The URL can be used to link to this page

Home My WebLink About001054 Original Contract F c � STATE OF VVASMNGTON DEPARTMENT OF ECOLOGY PCJ Box 47600 , 01vinpia, M/A 98504-7600 1 360-407-6000 711 for Washington Bela}'Service o Persons with a speech disabffitJ�area call 877-833-6347' January 7., 2016. CERTIFIE D MAIL 7014 0150 0000 9188 6244 Mr. Dan McKeen City Manager" City of Port Angeles P.O. Box 1150 Port Angeles, WA 98362 RE: National Pollutant Discharge Elimination System (NPDES) Permit Issuance for the City of Port Angeles Wastewater Treatment Plant Dear Mr. McKeen: Enclosed is NPDES Permit No. WA0023973 for the city of Port Angeles Wastewater Treatment Plant. Also enclosed is the Department of Ecology's (Ecology) response to comments received during the public comment period of the draft permit. The permit is issued by Ecology in conformance with the Water Pollution. Control Law [Chapter 90.48 Revised Code of Washington (RCV')], and as authorized by the U.S. Environmental Protection Agency (EPA) acting under the Federal Clean Water Act. Submission of an application for permit renewal or continued discharge must be received by Ecology the date indicated in the permit [Washington Administrative Code (WAC) 173-220-1-80]. Please contact.Carey Cholski, Permit Administrator, at 360-407-6279, or by e-mail at care y.cl)olski(c.),eev.wa.�-,ov for an application form. The new permit requires you to submit Discharge Monitoring Reports (DMRs) electronically by using our WAWebDMR, unless we issue a waiver(Special Condition S3.A.). For more information please go to the WAWebDMR home page: ht.tp://www.ecy.Nva.�-yov/programs/wq/permits/paris/webdmr.html. Or call Tonya Wolfe in our Headquarters Technical Assistance Unit(360-407-7097), or Carey Cholski in our Southwest.Region (360-407-6279). You have the right to appeal this permit within 30 days upon receipt of this document. Pursuant to Chapter 43.21B RCW, your appeal must be filed with the Pollution Control Hearings Board, and served oil the Department of Ecology, within 30 days of the date of your receipt of this document. If you choose to appeal this decision, your notice of appeal must contain: (1) a copy of the permit you are appealing, and (2) a copy of the application for the permit/modification.. Any appeal must contain the following in accordance with the rules of the Hearings Board: a. The appellant's name and address; b. The coverage date and number of the permit appealed; C. A description of the substance within the permit that is the subject of the appeal; d. A clear, separate, and concise statement of every error alleged to have been committed; Mr. Dan MoI{eon Page a. A clear and concise statement of1belaut which the requester relies 10 sustain his or her statements of error; and f. A atatcaoeo1 setting forth the relief sought. ADDRESS AND LOCATION Street Addresses Mailing Addresses Department of Ecology Department of Ecology Attn: Appeals Processing Desk Attn: Appeals Processing Desk 300 Desmond Drive Southeast P.O. Box 47608 Lacey., WA 98503) Olympia, WA 98504-7608 Pollution Control Hearings Board Pollution Control Hearings Board I I I I Israel Road Southwest, Suite 301 P.O. Box 40903 Turnwater, WA 98501 Olympia, WA 98504-0903 /r07-moditio/u/ bo67-modom. Hearings (7/ficoN/ebxdo. If you have any questions on this action, please contact Dave Dougherty at 360-407-6278, or by e-mail at d avid.dough eEt.yLd-).ecy. , BJuburdI)000gemr Southwest Region &4aoogcr Water Quality Program FD}:CC(0023973) Eocloourca co: Craig Fulton, City of Port Angeles Mikcl.idgurd, EPA Region 10 Richard Smith, Smith 6tLoprocy, PI.I.0 Jeff Young, City of Port Angeles City of Port Angeles Record # 001054 Page 1 of 59 Permit No. WA0023973 Issuance Date: January 7, 2016 Effective Date: February 1, 2016 Expiration Date: January 31, 2021 DEPARTMENT OF ECOLOGY State of Washington NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM WASTE DISCHARGE PERMIT NO. WA0023973 State of Washington DEPARTMENT OF ECOLOGY Southwest Regional Office P.O. Box 47775 Olympia, WA 98504 -7775 In compliance with the provisions of The State of Washington Water Pollution Control Law Chapter 90.48 Revised Code of Washington and The Federal Water Pollution Control Act (The Clean Water Act) Title 33 United States Code, Section 1342 et seq. City of Port Angeles 321 East Fifth Street P.O. Box 1150 Port Angeles, WA 98362 is authorized to discharge in accordance with the Special and General Conditions that follow. Plant Location: 1509 East Columbia Street Port Angeles, Washington Treatment Type: Trickling Filter /Solids Contact with Chlorine Disinfection Receiving Water: Strait of Juan de Fuca Rich Doenges Southwest Region Manager Water Quality Program Washington State Department of Ecology Page 2 of 59 Permit No. WA0023973 TABLE OF CONTENTS TABLEOF CONTENTS ...........................................................................................................................2 SUMMARY OF PERMIT REPORT SUBMITTALS.............................................................................2 SPECIALCONDITIONS ..........................................................................................................................2 S1. DISCHARGE LIMITS ....................................................................................................................2 A. Effluent Limits....................................................................................................................2 B. Mixing Zone Authorization................................................................................................2 S2. MONITORING REQUIREMENTS................................................................................................2 A. Monitoring Schedule...........................................................................................................2 B. Combined Sewer Overflow(CSO) Monitoring Schedule ..................................................2 C. Sampling and Analytical Procedures..................................................................................2 D. Flow Measurement, Field Measurement, and Continuous Monitoring Devices ................2 E. Laboratory Accreditation....................................................................................................2 S3. REPORTING AND RECORDING REQUIREMENTS .................................................................2 A. Discharge Monitoring Reports............................................................................................2 B. Permit Submittals and Schedules........................................................................................2 C. Records Retention...............................................................................................................2 D. Recording of Results...........................................................................................................2 E. Additional Monitoring by the Permittee.............................................................................2 F. Reporting Permit Violations...............................................................................................2 G. Other Reporting ..................................................................................................................2 H. Maintaining a Copy of this Permit......................................................................................2 S4. FACILITY LOADING....................................................................................................................2 A. Design Criteria....................................................................................................................2 B. Plans for Maintaining Adequate Capacity..........................................................................2 C. Duty to Mitigate..................................................................................................................2 D. Notification of New or Altered Sources .............................................................................2 E. Infiltration and Inflow Evaluation ......................................................................................2 F. Wasteload Assessment........................................................................................................2 S5. OPERATION AND MAINTENANCE...........................................................................................2 A. Certified Operator...............................................................................................................2 B. Operation and Maintenance Program .................................................................................2 C. Short-Term Reduction ........................................................................................................2 D. Electrical Power Failure......................................................................................................2 E. Prevent Connection of Inflow.............................................................................................2 F. Bypass Procedures..............................................................................................................2 G. Operations and Maintenance (O&M)Manual....................................................................2 S6. PRETREATMENT..........................................................................................................................2 A. General Requirements.........................................................................................................2 B. Monitoring Requirements...................................................................................................2 C. Reporting of Monitoring Results........................................................................................2 D. Local Limit Development...................................................................................................2 Page 3 of 59 Permit No. WA0023973 STSOLID WASTES.............................................................................................................................2 A. Solid Waste Handling.........................................................................................................2 B. Leachate..............................................................................................................................2 S8. APPLICATION FOR PERMIT RENEWAL OR MODIFICATION FOR FACILITY CHANGES..........................................................................................................................2 S9. COMBINED SEWER OVERFLOWS ............................................................................................2 A. Authorized Combined Sewer Overflow Discharge Locations............................................2 B. Nine Minimum Controls.....................................................................................................2 C. Combined Sewer Overflow Annual Report........................................................................2 D. Compliance Schedule .........................................................................................................2 E. Requirements for Controlled Combined Sewer Overflows................................................2 S 10. OUTFALL EVALUATION............................................................................................................2 SI I. ACUTE TOXICITY ........................................................................................................................2 A. Testing When There is No Permit Limit for Acute Toxicity..............................................2 B. Sampling and Reporting Requirements ..............................................................................2 512. CHRONIC TOXICITY....................................................................................................................2 A. Testing When There is No Permit Limit for Chronic Toxicity...........................................2 B. Sampling and Reporting Requirements ..............................................................................2 GENERALCONDITIONS........................................................................................................................2 GI. SIGNATORY REQUIREMENTS...................................................................................................2 G2. RIGHT OF INSPECTION AND ENTRY.......................................................................................2 G3. PERMIT ACTIONS.........................................................................................................................2 G4. REPORTING PLANNED CHANGES............................................................................................2 G5. PLAN REVIEW REQUIRED .........................................................................................................2 G6. COMPLIANCE WITH OTHER LAWS AND STATUTES...........................................................2 G7. TRANSFER OF THIS PERMIT .....................................................................................................2 G8. REDUCED PRODUCTION FOR COMPLIANCE ........................................................................2 G9. REMOVED SUBSTANCES ...........................................................................................................2 GIO. DUTY TO PROVIDE INFORMATION.........................................................................................2 GI 1. OTHER REQUIREMENTS OF 40 CFR.........................................................................................2 G12. ADDITIONAL MONITORING......................................................................................................2 G13. PAYMENT OF FEES......................................................................................................................2 G14. PENALTIES FOR VIOLATING PERMIT CONDITIONS............................................................2 G15. UPSET.............................................................................................................................................2 G16. PROPERTY RIGHTS......................................................................................................................2 GI7. DUTY TO COMPLY ......................................................................................................................2 G18. TOXIC POLLUTANTS...................................................................................................................2 G19. PENALTIES FOR TAMPERING...................................................................................................2 Page 4 of 59 Permit No. WA0023973 G20. COMPLIANCE SCHEDULES .......................................................................................................2 G21. SERVICE AGREEMENT REVIEW...............................................................................................2 APPENDIXA............................................................................................................................................45 Page 5 of 59 Permit No. WA0023973 SUMMARY OF PERMIT REPORT SUBMITTALS Refer to the Special and General Conditions of this permit for additional submittal requirements. Permit Submittal Frequency First Submittal Date Section S3.A. Discharge Monitoring Report(DMR) Monthly March 15, 2016 S3.A. Quarterly DMR Quarterly July 15, 2018 S3.A. Annual DMR Annual January 15, 2018 S3.F. Reporting Permit Violations As necessary S4.13. Plans for Maintaining Adequate Capacity As necessary S4.D. Notification of New or Altered Sources As necessary S4.E. Infiltration and Inflow Evaluation Annually May 15, 2016 S4.F. Wasteload Assessment Annually May 15, 2016 S5.F. Bypass Notification As necessary Operations and Maintenance (O&M) S5.G. Manual Update or Review Confirmation Annually November 30, 2016 Letter S6.A.5. Pretreatment Report Annually April 15, 2016 S6.A.6. Request to Make Changes to Pretreatment As necessary Program S8. Application for Permit Renewal 1/permit cycle September 1,2020 S9.C. Combined Sewer Overflow Report Annually May 15, 2016 S9.D. Combined Sewer Overflow Reduction 1/permit cycle June 30,2016 Specific Project Milestones/Goals SM. Outfall Evaluation 1/permit cycle December 31, 2019 511. Acute Toxicity Effluent Test Results - 1/permit cycle September 1 2020 Submit with Permit Renewal Application S12. Chronic Toxicity Effluent Test Results with 1/permit cycle September 1,2020 Permit Renewal Application G1. Notice of Change in Authorization As necessary G4. Reporting Planned Changes As necessary G5. Engineering Report for Construction or As necessary Modification Activities G7. Notice of Permit Transfer As necessary G10. Duty to Provide Information As necessary G20. Compliance Schedules As necessary Page 6 of 59 Permit No. WA0023973 Permit Submittal Frequency First Submittal Date Section G21. Contract Submittal As necessary Page 7 of 59 Permit No. WA0023973 SPECIAL CONDITIONS SI. DISCHARGE LIMITS A. Effluent Limits All discharges and activities authorized by this permit must comply with the terms and conditions of this permit. The discharge of any of the following pollutants more frequently than, or at a level in excess of, that identified and authorized by this permit violates the terms and conditions of this permit. Beginning on the effective date of this permit, the Permittee may discharge treated domestic wastewater to Port Angeles Harbor and the Strait of Juan de Fuca at the permitted locations subject to compliance with the following limits: Effluent Limits: Outfalls 001 &002 001: Latitude: 48.12722 Longitude: -123.39806 002: Latitude: 48.12826 Longitude: -123.37935 Parameter Average Monthly' Average Weekly b Carbonaceous Biochemical 25 milligrams/liter(mg/L) 40 mg/L Oxygen Demand(5-day) 905 pounds/day(lbs/day) 1 358 lbs/day (CBOD5) 85%removal of influent CBOD5 C Total Suspended Solids 30 mg/L 45 mg/L (TSS) 1,676 lbs/day 2,515 lbs/day 85%removal of influent TSS Parameter Minimum Maximum pH 6.0 Standard Units 9.0 Standard Units Parameter Monthly Geometric Mean Weekly Geometric Mean Fecal Coliform Bacteria d 200/100 milliliter(mL) 400/100 mL Parameter Average Monthly Maximum Daily e Total Residual Chlorine 0.50 mg/L 0.75 mg/L a Average monthly effluent limit means the highest allowable average of daily discharges over a calendar month. To calculate the discharge value to compare to the limit,you add the value of each daily discharge measured during a calendar month and divide this sum by the total number of daily discharges measured. See footnote d for fecal coliform calculations. b Average weekly discharge limit means the highest allowable average of daily discharges over a calendar week,calculated as the sum of all daily discharges measured during a calendar week divided by the number of daily discharges' measured during that week. See footnote d for fecal coliform calculations. Page 8 of 59 Permit No. WA0023973 Effluent Limits: Outfalls 001 &002 001: Latitude: 48.12722 Longitude: -123.39806 002: Latitude: 48.12826 Longitude: -123.37935 c When monthly average influent CBOD5 concentration falls below 90 mg/L, a minimum 75 percent removal of influent CBOD5 is required. When monthly average influent TSS concentration falls below 90 mg/L, a minimum 75 percent removal of influent TSS is required. d The Department of Ecology(Ecology)provides directions to calculate the monthly and the weekly geometric mean in publication No. 04-10-020, Information Manual for Treatment Plant Operators available at: htip://www.ecy.wa.gov/pubs/0410020.pd. e Maximum daily effluent limit is the highest allowable daily discharge. The daily discharge is the average discharge of a pollutant measured during a calendar day. For pollutants with limits expressed in units of mass, calculate the daily discharge as the total mass of the pollutant discharged over the day. This does not apply to pH or temperature. B. Mixing Zone Authorization Mixing Zone for Outfall 001 The following paragraphs define the maximum boundaries of the mixing zones for Outfall 001: Chronic Mixing Zone The mixing zone is a circle with radius of 260 feet(79.2 meters)measured from the center of each discharge port. The mixing zone extends from the bottom to the top of the water column. The concentration of pollutants at the edge of the chronic zone must meet chronic aquatic life criteria and human health criteria. Acute Mixing Zone The acute mixing zone is a circle with radius of 26 feet (7.9 meters) measured from the center of each discharge port. The mixing zone extends from the bottom to the top of the water column. The concentration of pollutants at the edge of the acute zone must meet acute aquatic life criteria. Available Dilution (Dilution Factor) Acute Aquatic Life Criteria 37 Chronic Aquatic Life Criteria 510 Human Health Criteria- Carcinogen 510 Human Health Criteria-Non-carcinogen 510 Page 9 of 59 Permit No. WA0023973 Mixing Zone for Outfall 002 The following paragraphs define the maximum boundaries of the mixing zones for Outfall 002: Chronic Mixing Zone The mixing zone is a circle with radius of 352 feet(107 meters)measured from the center of each discharge port. The mixing zone extends from the bottom to the top of the water column. The concentration of pollutants at the edge of the chronic zone must meet chronic aquatic life criteria and human health criteria. Acute Mixing Zone The acute mixing zone is a circle with radius of 35.2 feet (10.7 meters) measured from the center of each discharge port. The mixing zone extends from the bottom to the top of the water column. The concentration of pollutants at the edge of the acute zone must meet acute aquatic life criteria. Available Dilution (dilution factor) Acute Aquatic Life Criteria 68 Chronic Aquatic Life Criteria 593 Human Health Criteria- Carcinogen 593 Human Health Criteria-Non-carcinogen 593 S2. MONITORING REQUIREMENTS A. Monitoring Schedule The Permittee must monitor in accordance with the following schedule and the requirements specified in Appendix A. Units& Minimum Parameter Speciation Sampling Sample Type Frequency (1)Wastewater Influent Wastewater Influent means the raw sewage flow from the collection system into the treatment facility. Sample the wastewater entering the headworks of the treatment plant excluding any side-stream returns from inside the plant. Flow MGD Continuous a Metered/Recorded CBOD5 mg/L 2/week b Composite Sample (24-Hour) CBOD5 lbs/day 2/week b Calculated d Page 10 of 59 Permit No. WA0023973 Units& Minimum Parameter Speciation Sampling Sample Type Frequency TSS mg/L 2/week b Composite Sample (24-Hour) TSS lbs/day 2/week b Calculated d (2)Final Wastewater Effluent Final Wastewater Effluent means wastewater exiting the last treatment process or operation. Typically, this is after or at the exit from the chlorine contact chamber or other disinfection process. The Permittee may take effluent samples for the BOD5 analysis before or after the disinfection process. If taken after, the Permittee must dechlorinate and reseed the sample. CBOD5 mg/L 2/week b Composite Sample (24-Hour) CBOD5 lbs/day 2/week b Calculated d CBOD5 %removal 2/week b Calculated e TSS mg/L 2/week b Composite Sample (24-Hour)e TSS lbs/day 2/week b Calculated d TSS %removal 2/week b Calculated e Chlorine (Total mg/L 1/day Grab f Residual) Fecal Coliform S #/100 ml 3/week Grab f pH h Standard Units 1/day Grab f Temperature Degrees 1/day Measurement Centigrade (°C) Total Ammonia mg/L as N 1/week Composite Sample (24-Hour)e (3)Whole Effluent Toxicity Testing—Final Wastewater Effluent Acute Toxicity As specified in Special Condition S11 Testing Chronic Toxicity Testing As specified in Special Condition S12 (4)Pretreatment As specified in Special Condition S6.13 Page 11 of 59 Permit No. WA0023973 Units& Minimum Parameter Speciation Sampling Sample Type Frequency (5)Effluent Characterization —Final Wastewater Effluent Monthly J for 2 Total Phosphorus mg/L as P years, then Composite Sample Quarterly', (24-Hour) thereafter Monthly J for 2 Soluble Reactive mg/L as P years, then Composite Sample Phosphorus Quarterly', (24-Hour) thereafter Monthly J for 2 Nitrate plus Nitrite mg/L as N years, then Composite Sample Nitrogen Quarterly', (24-Hour) thereafter Monthly J for 2 Total Kjeldahl years, then Composite Sample Nitrogen(TKN) mg/L as N Quarterly', (24-Hour) thereafter (6)Permit Renewal Application Requirements—Final Wastewater Effluent The Permittee must record and report the wastewater treatment plant flow discharged on the day it collects the sample for priority pollutant testing with the discharge monitoring report. BOD5 k mg/L Once per year- Composite Sample (24-Hour) Dissolved Oxygen mg/L Once per year- Grab f Oil and Grease mg/L Once per year- Grab f Total Dissolved mg/L Once per year- Composite Sample Solids (24-Hour) Total Hardness mg/L Once per year M Composite Sample (24-Hour) Cyanide micrograms/liter Once per year m Grab f (µg/L) Total Phenolic µg/L Once per year m Grab f Compounds Priority Pollutants µg/L;nanograms Composite Sample (PP) —Total Metals (ng/L) for Quarterly (24-Hour) mercury Grabf for mercury PP—Volatile Organic µg/L Once per year m Grab f Compounds Page 12 of 59 Permit No. WA0023973 Units& Minimum Parameter Speciation Sampling Sample Type Frequency PP—Acid-extractable M/L Once per year M Composite Sample Compounds (24-Hour) PP—Base-neutral µg/L Once per year M Composite Sample Compounds (24-Hour) a Continuous means uninterrupted except for brief lengths of time for calibration, power failure,or unanticipated equipment repair or maintenance. The time interval for the associated data logger must be no greater than 30 minutes. b Two (2)/week means two times during each calendar week. c Twenty-four (24)-hour composite means a series of individual samples collected over a 24-hour period into a single container, and analyzed as one sample. d Calculated means figured concurrently with the respective sample, using the following formula: Concentration (in mg/L) X Flow (in MGD) X Conversion Factor(8.34) =lbs/day e Percent removal=Influent concentration(mg/L) —Effluent concentration(mg/L) x 100 Influent concentration (mg/L) Calculate the percent removal of BOD5 and TSS using the above equation. f Grab means an individual sample collected over a 15 minute, or less,period. g Report a numerical value for fecal coliforms following the procedures in Ecology's Information Manual for Wastewater Treatment Plant Operators, Publication Number 04-10-020 available at: htip://www.ecy.wa.goy/programs/wg/permits/guidance.html. Do not report a result as too numerous to count(TNTC). h Report the daily pH and the minimum and maximum for the monitoring period. i Temperature grab sampling must occur when the effluent is at or near its daily maximum temperature, which usually occurs in the late afternoon. If measuring temperature continuously, the Permittee must determine and report a daily maximum from half-hour measurements in a 24-hour period. Continuous monitoring instruments must achieve an accuracy of 0.2 degrees C and the Permittee must verify accuracy annually. j Monthly means once every calendar month during alternating weeks. k Take effluent samples for the BOD5 analysis before or after the disinfection process. If taken after, dechlorinate and reseed the sample. 1 Quarterly sampling periods are January through March, April through June,July through September, and October through December. The Permittee must begin quarterly monitoring April 1,2018. m Annual sampling period is January through December. The Permittee must begin annual monitoring January 1,2017. Page 13 of 59 Permit No. WA0023973 B. Combined Sewer Overflow(CSO) Monitoring Schedule The Permittee must monitor all discharges from CSO outfalls listed in Special Condition S9 using the following monitoring schedule. Permittees must use automatic flow monitoring equipment to collect the information required below. Permittee must calibrate flow monitoring equipment according to requirements in Condition S2.D. Parameter Units Minimum Sampling Sample Type Frequency CSO discharge is defined as any untreated CSO which will exit or has exited the CSO outfall. Volume Gallons Per Event Measurement/ Discharged Calculation a,b Discharge Hours Per Event c Measurement Duration Storm Duration Hours Per Event d Measurement Precipitation Inches Per Event c Calcuremenb alculation Footnotes for CSO Monitoring: a Flow measurement must be continuous, except for brief lengths of time for calibration, for power failure, or for unanticipated equipment repair or maintenance. During periods of interrupted service, a calculation may be used to estimate the discharge volume. An explanation must be provided in the monthly DMR for all disruptions in flow measurement. b "Measurement/Calculation" means the total volume of the discharge or amount of precipitation event as estimated by direct measurement or indirectly by calculation (i.e. flow weirs, pressure transducers, tipping bucket). Precipitation must be measured by the nearest possible precipitation-measuring device and actively monitored during the period of interest. Per Event"means a unique flow event as defined in the Permit Writer's Manual,p. V-17. Ecology defines the minimum inter-event period(MIST)as 24 hours. A CSO event is considered to have ended only after at least 24 hours has elapsed since the last measured occurrence of an overflow. d Storm duration is the amount of total time when precipitation occurred that contributed to a discharge event. It is determined on a case-by-case basis. C. Sampling and Analytical Procedures Samples and measurements taken to meet the requirements of this permit must represent the volume and nature of the monitored parameters. The Permittee must conduct representative sampling of any unusual discharge or discharge condition, including bypasses,upsets, and maintenance-related conditions that may affect effluent quality. Sampling and analytical methods used to meet the monitoring requirements specified in this permit must conform to the latest revision of the Guidelines Establishing Test Procedures for the Analysis of Pollutants contained in 40 Code of Federal Regulations (CFR) Part 136 [or as applicable in 40 CFR subchapters N (Parts 400-471) or 0 (Parts Page 14 of 59 Permit No. WA0023973 501-503)]unless otherwise specified in this permit. The Department of Ecology(Ecology) may only specify alternative methods for parameters without permit limits and for those parameters without an Environmental Protection Agency (EPA)-approved test method in 40 CFR Part 136. D. Flow Measurement, Field Measurement, and Continuous Monitoring Devices The Permittee must: 1. Select and use appropriate flow measurement, field measurement, and continuous monitoring devices and methods consistent with accepted scientific practices. 2. Install, calibrate, and maintain these devices to ensure the accuracy of the measurements is consistent with the accepted industry standard, the manufacturer's recommendation, and approved Operation and Maintenance (O&M) Manual procedures for the device and the wastestream. 3. Calibrate continuous monitoring instruments weekly unless it can demonstrate a longer period is sufficient based on monitoring records. The Permittee: a. May calibrate apparatus for continuous monitoring of dissolved oxygen by air calibration. b. Must calibrate continuous pH measurement instruments using a grab sample analyzed in the lab with a pH meter calibrated with standard buffers and analyzed within 15 minutes of sampling. C. Must calibrate continuous chlorine measurement instruments using a grab sample analyzed in the laboratory within 15 minutes of sampling. 4. Calibrate micro-recording temperature devices, known as thermistors, using protocols from Ecology's Quality Assurance Project Plan Development Tool (Standard Operating Procedures for Continuous Temperature Monitoring of Fresh Water Rivers and Streams Version 1.0 1012612011). This document is available online at: htlp://www.ecy.wa.goy/programs/eap/ga/docs/ECY EAP SOP Cont Temp Mo n Ambient vl 0EAP080.pdf. Calibration as specified in this document is not required if the Permittee uses recording devices certified by the manufacturer. 5. Use field measurement devices as directed by the manufacturer and do not use reagents beyond their expiration dates. 6. Establish a calibration frequency for each device or instrument in the O&M Manual that conforms to the frequency recommended by the manufacturer. 7. Calibrate flow-monitoring devices at a minimum frequency of at least one calibration per year. 8. Maintain calibration records for at least three years. Page 15 of 59 Permit No. WA0023973 E. Laboratory Accreditation The Permittee must ensure that all monitoring data required by Ecology for permit specified parameters is prepared by a laboratory registered or accredited under the provisions of chapter 173-50 Washington Administrative Code (WAC), Accreditation of Environmental Laboratories. Flow,Temperature, Settleable Solids,Conductivity,pH, and internal process control parameters are exempt from this requirement. The Permittee must obtain accreditation for conductivity and pH if it must receive accreditation or registration for other parameters. S3. REPORTING AND RECORDING REQUIREMENTS The Permittee must monitor and report in accordance with the following conditions. Falsification of information submitted to Ecology is a violation of the terms and conditions of this permit. A. Discharge Monitoring Reports (DMRs) The first monitoring period begins on the effective date of the permit (unless otherwise specified). The Permittee must: 1. Summarize, report, and submit monitoring data obtained during each monitoring period on the electronic Discharge Monitoring Report (DMR) form provided by Ecology within the Water Quality Permitting Portal. Include data for each of the parameters tabulated in Special Condition S2 and as required by the form. Report a value for each day sampling occurred (unless specifically exempted in the permit) and for the summary values (when applicable) included on the electronic form. To find out more information and to sign up for the Water Quality Permitting Portal go to: htlp://www.ecy.wa.gov/programs/wg/ ep rmits/paris/webdmr.html 2. Enter the "No Discharge" reporting code for an entire DMR, for a specific monitoring point, or for a specific parameter as appropriate, if the Permittee did not discharge wastewater or a specific pollutant during a given monitoring period. 3. Report single analytical values below detection as "less than the detection level (DL)" by entering < followed by the numeric value of the detection level (e.g. < 2.0) on the DMR. If the method used did not meet the minimum DL and quantitation level(QL)identified in the permit,report the actual QL and DL in the comments or in the location provided. 4. Do Not report zero for bacteria monitoring. Report as required by the laboratory method. 5. Calculate and report an arithmetic average value for each day for bacteria if multiple samples were taken in one day. 6. Calculate the geometric mean values for bacteria(unless otherwise specified in the permit)using: Page 16 of 59 Permit No. WA0023973 a. The reported numeric value for all bacteria samples measured above the detection value except when it took multiple samples in one day. If the Permittee takes multiple samples in one day it must use the arithmetic average for the day in the geometric mean calculation. b. The detection value for those samples measured below detection. 7. Report the test method used for analysis in the comments if the laboratory used an alternative method not specified in the permit and as allowed in Appendix A. 8. Calculate average values and calculated total values(unless otherwise specified in the permit)using: a. The reported numeric value for all parameters measured between the agency-required detection value and the agency-required quantitation value. b. One-half the detection value (for values reported below detection) if the lab detected the parameter in another sample from the same monitoring point for the reporting period. C. Zero (for values reported below detection) if the lab did not detect the parameter in another sample for the reporting period. 9. Report single-sample grouped parameters(for example:priority pollutants,PAHs, pulp and paper chlorophenolics, TTOs) on the WQWebDMR form and include: sample date, concentration detected, detection limit (DL) (as necessary), and laboratory quantitation level(QL) (as necessary). The Permittee must also submit an electronic copy of the laboratory report as an attachment using WQWebDMR. The contract laboratory reports must also include information on the chain of custody, QA/QC results, and documentation of accreditation for the parameter. 10. Ensure that DMRs are electronically submitted no later than the dates specified below,unless otherwise specified in this permit. 11. Submit DMRs for parameters with the monitoring frequencies specified in S2 (monthly, quarterly, annual, etc.) at the reporting schedule identified below. The Permittee must: a. Submit monthly DMRs by the 15`i'day of the following month. b. Submit quarterly DMRs,unless otherwise specified in the permit,by the 15t' day of the month following the monitoring period. Quarterly sampling periods are January through March, April through June, July through September, and October through December. The Permittee must submit the first quarterly DMR April 1,2016. Page 17 of 59 Permit No. WA0023973 C. Submit annual DMRs, unless otherwise specified in the permit, by January 15th for the previous calendar year. The annual sampling period is the calendar year, starting January 1,2017. d. Submit permit renewal application monitoring data in WQWebDMR as required in Special Condition S2 by September 1,2020. B. Permit Submittals and Schedules The Permittee must ensure that all other written permit-required reports are postmarked or received by Ecology no later than the dates specified in the permit. The Permittee may use the Water Quality Permitting Portal—Permit Submittals application to submit written permit-required reports by the date specified in the permit. Send any paper reports to Ecology at the following address: Water Quality Permit Coordinator Department of Ecology Southwest Regional Office P.O. Box 47775 Olympia, WA 98504-7775 C. Records Retention The Permittee must retain records of all monitoring information for a minimum of three years. Such information must include all calibration and maintenance records and all original recordings for continuous monitoring instrumentation, copies of all reports required by this permit, and records of all data used to complete the application for this permit. The Permittee must extend this period of retention during the course of any unresolved litigation regarding the discharge of pollutants by the Permittee or when requested by Ecology. D. Recording of Results For each measurement or sample taken, the Permittee must record the following information: 1. The date, exact place,method, and time of sampling or measurement. 2. The individual who performed the sampling or measurement. 3. The dates the analyses were performed. 4. The individual who performed the analyses. 5. The analytical techniques or methods used. 6. The results of all analyses. Page 18 of 59 Permit No. WA0023973 E. Additional Monitoring by the Permittee If the Permittee monitors any pollutant more frequently than required by Special Condition S2 of this permit, then the Permittee must include the results of such monitoring in the calculation and reporting of the data submitted in the Permittee's DMR unless otherwise specified by Special Condition S2. F. Reporting Permit Violations The Permittee must take the following actions when it violates or is unable to comply with any permit condition: I. Immediately take action to stop, contain, and cleanup unauthorized discharges or otherwise stop the noncompliance and correct the problem. 2. If applicable,immediately repeat sampling and analysis. Submit the results of any repeat sampling to Ecology within 30 days of sampling. a. Immediate Reporting The Permittee must immediately report to Ecology and the Department of Health, Shellfish Program, and the Local Health Jurisdiction (at the numbers listed below), all: • Failures of the disinfection system. • Collection system overflows. • Plant bypasses other than authorized operating procedures that discharge to marine surface waters. • Any other failures of the sewage system(pipe breaks, etc.) Southwest Regional Office 360-407-6300 Department of Health, 360-236-3330 (business hours) Shellfish Program 360-789-8962 (after business hours) Clallam County Environmental 360-417-2258 Health Services b. Twenty-Four(24)-Hour Reporting The Permittee must report the following occurrences of noncompliance by telephone, to Ecology at the telephone numbers listed above, within 24 hours from the time the Permittee becomes aware of any of the following circumstances: Page 19 of 59 Permit No. WA0023973 1. Any noncompliance that may endanger health or the environment, unless previously reported under immediate reporting requirements. 2. Any unanticipated bypass that causes an exceedance of an effluent limit in the permit(See Part S5.F, `Bypass Procedures"). 3. Any upset that causes an exceedance of an effluent limit in the permit(See G15, "Upset"). 4. Any violation of a maximum daily or instantaneous maximum discharge limit for any of the pollutants in Section S1.A of this permit. 5. Any overflow prior to the treatment works, whether or not such overflow endangers health or the environment or exceeds any effluent limit in the permit. C. Report Within Five Days The Permittee must also submit a written report within five days of the time that the Permittee becomes aware of any reportable event under subparts a or b, above. The report must contain: 1. A description of the noncompliance and its cause. 2. The period of noncompliance,including exact dates and times. 3. The estimated time the Permittee expects the noncompliance to continue if not yet corrected. 4. Steps taken or planned to reduce, eliminate, and prevent recurrence of the noncompliance. 5. If the noncompliance involves an overflow prior to the treatment works, an estimate of the quantity (in gallons) of untreated overflow. d. Waiver of Written Reports Ecology may waive the written report required in subpart c, above, on a case-by-case basis upon request if the Permittee has submitted a timely oral report. e. All Other Permit Violation Reporting The Permittee must report all permit violations, which do not require immediate or within 24 hours reporting, when it submits monitoring reports for S3.A ("Reporting"). The reports must contain the information listed in subpart c, above. Compliance with these requirements does not relieve the Permittee from responsibility to maintain continuous Page 20 of 59 Permit No. WA0023973 compliance with the terms and conditions of this permit or the resulting liability for failure to comply. G. Other Reporting 1. Spills of Oil or Hazardous Materials The Permittee must report a spill of oil or hazardous materials in accordance with the requirements of Revised Code of Washington (RCW) 90.56.280 and chapter 173-303-145. You can obtain further instructions at the following website: htip://www.ecy.wa.goy/pro rag ms/spills/other/reportast)ill.htm. 2. Failure to Submit Relevant or Correct Facts Where the Permittee becomes aware that it failed to submit any relevant facts in a permit application, or submitted incorrect information in a permit application, or in any report to Ecology,it must submit such facts or information promptly. H. Maintaining a Copy of this Permit The Permittee must keep a copy of this permit at the facility and make it available upon request to Ecology inspectors. S4. FACILITY LOADING A. Design Criteria The flows or waste loads for the permitted facility must not exceed the following design criteria: Maximum Month Design Flow(MMDF) 10.8 MGD BOD5 Influent Loading for Maximum Month 8,100 lbs/day TSS Influent Loading for Maximum Month 11,750 lbs/day B. Plans for Maintaining Adequate Capacity 1. Conditions Triggering Plan Submittal The Permittee must work with Ecology to determine if a plan and a schedule for continuing to maintain capacity are needed when: a. The actual flow or waste load reaches 85 percent of any one of the design criteria in S4.A for three consecutive months. b. The projected plant flow or loading would reach design capacity within five years. Page 21 of 59 Permit No. WA0023973 2. Plan and Schedule Content The plan and schedule must identify the actions necessary to maintain adequate capacity for the expected population growth and to meet the limits and requirements of the permit. The Permittee must consider the following topics and actions in its plan. a. Analysis of the present design and proposed process modifications b. Reduction or elimination of excessive infiltration and inflow of uncontaminated ground and surface water into the sewer system C. Limits on future sewer extensions or connections or additional waste loads d. Modification or expansion of facilities e. Reduction of industrial or commercial flows or wasteloads Engineering documents associated with the plan must meet the requirements of WAC 173-240-060, "Engineering Report," and be approved by Ecology prior to any construction. C. Duty to Mitigate The Permittee must take all reasonable steps to minimize or prevent any discharge or sludge use or disposal in violation of this permit that has a reasonable likelihood of adversely affecting human health or the environment. D. Notification of New or Altered Sources 1. The Permittee must submit written notice to Ecology whenever any new discharge or a substantial change in volume or character of an existing discharge into the wastewater treatment plant is proposed which: a. Would interfere with the operation of, or exceed the design capacity of, any portion of the wastewater treatment plant. b. Is not part of an approved general sewer plan or approved plans and specifications. C. Is subject to pretreatment standards under 40 CFR Part 403 and Section 307(b) of the Clean Water Act. 2. This notice must include an evaluation of the wastewater treatment plant's ability to adequately transport and treat the added flow and/or waste load,the quality and volume of effluent to be discharged to the treatment plant, and the anticipated impact on the Permittee's effluent[40 CFR 122.42(b)]. Page 22 of 59 Permit No. WA0023973 E. Infiltration and Inflow Evaluation 1. The Permittee must conduct an infiltration and inflow evaluation. Refer to the U.S. EPA publication, I/I Analysis and Project Certification, available as Publication No. 97-03 at: htip://www.ecy.wa.gov/.programs/wry/permits/guidance.html 2. The Permittee may use monitoring records to assess measurable infiltration and inflow. 3. The Permittee must prepare a report summarizing any measurable infiltration and inflow. 4. The Permittee must submit a report summarizing the results of the evaluation and any recommendations for corrective actions by May 15, 2016, and annually thereafter. F. Wasteload Assessment The Permittee must conduct an annual assessment of its influent flow and wasteload and submit a report to Ecology by May 15, 2016, and annually thereafter. The report must contain: 1. A description of compliance or noncompliance with the permit effluent limits. 2. A comparison between the existing and design: a. Monthly average dry weather and wet weather flows b. Peak flows C. BOD5loading d. Total Suspended Solids loadings 3. The percent change in the above parameters since the previous report (except for the first report). 4. The present and design population or population equivalent. 5. The projected population growth rate. 6. The estimated date upon which the Permittee expects the wastewater treatment plant to reach design capacity, according to the most restrictive of the parameters above. Ecology may modify the interval for review and reporting if it determines that a different frequency is sufficient. S5. OPERATION AND MAINTENANCE The Permittee must at all times properly operate and maintain all facilities and systems of treatment and control(and related appurtenances),which are installed to achieve compliance with the terms Page 23 of 59 Permit No. WA0023973 and conditions of this permit. Proper operation and maintenance also includes keeping a daily operation logbook (paper or electronic), adequate laboratory controls, and appropriate quality assurance procedures. This provision of the permit requires the Permittee to operate backup or auxiliary facilities or similar systems only when the operation is necessary to achieve compliance with the conditions of this permit. A. Certified Operator This permitted facility must be operated by an operator certified by the state of Washington for at least a Class III plant. This operator must be in responsible charge of the day-to-day operation of the wastewater treatment plant. An operator certified for at least a Class II plant must be in charge during all regularly scheduled shifts. B. Operation and Maintenance Program The Permittee must: 1. Institute an adequate operation and maintenance program for the entire sewage system. 2. Keep maintenance records on all major electrical and mechanical components of the treatment plant, as well as the sewage system and pumping stations. Such records must clearly specify the frequency and type of maintenance recommended by the manufacturer and must show the frequency and type of maintenance performed. 3. Make maintenance records available for inspection at all times. C. Short-Term Reduction The Permittee must schedule any facility maintenance,which might require interruption of wastewater treatment and degrade effluent quality, during non-critical water quality periods and carry this maintenance out according to the approved Operation and Maintenance (O&M) Manual or as otherwise approved by Ecology. If a Permittee contemplates a reduction in the level of treatment that would cause a violation of permit discharge limits on a short-term basis for any reason,and such reduction cannot be avoided,the Permittee must: 1. Give written notification to Ecology,if possible, 30 days prior to such activities. 2. Detail the reasons for, length of time of, and the potential effects of the reduced level of treatment. This notification does not relieve the Permittee of its obligations under this permit. D. Electrical Power Failure The Permittee must ensure that adequate safeguards prevent the discharge of untreated wastes or wastes not treated in accordance with the requirements of this permit during electrical power failure at the treatment plant and/or sewage lift stations. Adequate Page 24 of 59 Permit No. WA0023973 safeguards include,but are not limited to, alternate power sources, standby generator(s), or retention of inadequately treated wastes. The Permittee must maintain Reliability Class II (EPA 430-99-74-001) at the wastewater treatment plant. Reliability Class II requires a backup power source sufficient to operate all vital components and critical lighting and ventilation during peak wastewater flow conditions. Vital components used to support the secondary processes (i.e., mechanical aerators or aeration basin air compressors)need not be operable to full levels of treatment, but must be sufficient to maintain the biota. E. Prevent Connection of Inflow The Permittee must strictly enforce its sewer ordinances and not allow the connection of inflow(roof drains, foundation drains, etc.) to the sanitary sewer system. F. Bypass Procedures This permit prohibits a bypass, which is the intentional diversion of waste streams from any portion of a treatment facility. Ecology may take enforcement action against a Permittee for a bypass unless one of the following circumstances (1, 2, or 3) applies. 1. Bypass for essential maintenance or wet weather operation of the approved wet weather high flow bypass system without the potential to cause violation of permit limits or conditions. This permit authorizes a bypass if it allows for essential maintenance or is an authorized operating procedure and does not have the potential to cause violations of limits or other conditions of this permit, or adversely impact public health as determined by Ecology prior to the bypass. For maintenance bypasses, the Permittee must submit prior notice, if possible, at least 10 days before the date of the bypass. 2. Bypass which is unavoidable, unanticipated, and results in noncompliance of this permit. This permit authorizes such a bypass only if: a. Bypass is unavoidable to prevent loss of life, personal injury, or severe property damage. "Severe property damage" means substantial physical damage to property, damage to the treatment facilities which would cause them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass. b. No feasible alternatives to the bypass exist, such as: • The use of auxiliary treatment facilities. • Retention of untreated wastes. Page 25 of 59 Permit No. WA0023973 • Maintenance during normal periods of equipment downtime, but not if the Permittee should have installed adequate backup equipment in the exercise of reasonable engineering judgment to prevent a bypass. • Transport of untreated wastes to another treatment facility. C. Ecology is properly notified of the bypass as required in Special Condition S3.F of this permit. 3. If bypass is anticipated and has the potential to result in noncompliance of this permit. a. The Permittee must notify Ecology at least 30 days before the planned date of bypass. The notice must contain: • A description of the bypass and its cause. • An analysis of all known alternatives which would eliminate, reduce, or mitigate the need for bypassing. • A cost-effectiveness analysis of alternatives including comparative resource damage assessment. • The minimum and maximum duration of bypass under each alternative. • A recommendation as to the preferred alternative for conducting the bypass. • The projected date of bypass initiation. • A statement of compliance with State Environmental Policy Act (SEPA). • A request for modification of water quality standards as provided for in WAC 173-201A-410,if an exceedance of any water quality standard is anticipated. • Details of the steps taken or planned to reduce, eliminate, and prevent reoccurrence of the bypass. b. For probable construction bypasses, the Permittee must notify Ecology of the need to bypass as early in the planning process as possible. The Permittee must consider the analysis required above during the project planning and design process. The project-specific engineering report or facilities plan as well as the plans and specifications must include details of probable construction bypasses to the extent practical. In cases where the Permittee determines the probable need to bypass early, the Permittee must continue to analyze conditions up to and including the construction period in an effort to minimize or eliminate the bypass. Page 26 of 59 Permit No. WA0023973 C. Ecology will consider the following prior to issuing an administrative order for this type of bypass: • If the bypass is necessary to perform construction or maintenance- related activities essential to meet the requirements of this permit. • If feasible alternatives to bypass exist, such as the use of auxiliary treatment facilities, retention of untreated wastes, stopping production, maintenance during normal periods of equipment down time, or transport of untreated wastes to another treatment facility. • If the Permittee planned and scheduled the bypass to minimize adverse effects on the public and the environment. After consideration of the above and the adverse effects of the proposed bypass and any other relevant factors,Ecology will approve or deny the request. Ecology will give the public an opportunity to comment on bypass incidents of significant duration, to the extent feasible. Ecology will approve a request to bypass by issuing an administrative order under RCW 90.48.120. G. Operations and Maintenance (O&M) Manual I. O&M Manual Submittal and Requirements The Permittee must: a. Review the O&M Manual at least annually and confirm this review by letter to Ecology by November 30th of each year. b. Submit to Ecology for review and approval substantial changes or updates to the O&M Manual whenever it incorporates them into the manual. C. Keep the approved O&M Manual at the permitted facility. d. Follow the instructions and procedures of this manual. 2. O&M Manual Components In addition to the requirements of WAC 173-240-080(1) through (5), the O&M Manual must be consistent with the guidance in Table GI-3 in the Criteria for Sewage Works Design (Orange Book), 2008. The O&M Manual must include: a. Emergency procedures for cleanup in the event of wastewater system upset or failure. b. A review of system components which if failed could pollute surface water or could impact human health. Provide a procedure for a routine schedule of checking the function of these components. Page 27 of 59 Permit No. WA0023973 C. Wastewater system maintenance procedures that contribute to the generation of process wastewater. d. Reporting protocols for submitting reports to Ecology to comply with the reporting requirements in the discharge permit. e. Any directions to maintenance staff when cleaning or maintaining other equipment or performing other tasks which are necessary to protect the operation of the wastewater system (for example, defining maximum allowable discharge rate for draining a tank, blocking all floor drains before beginning the overhaul of a stationary engine). f. The treatment plant process control monitoring schedule. g. Minimum staffing adequate to operate and maintain the treatment processes and carry out compliance monitoring required by the permit. S6. PRETREATMENT A. General Requirements 1. The Permittee must implement the Industrial Pretreatment Program in accordance with the legal authorities,policies,procedures, and financial provisions described in the Permittee's approved pretreatment program submittal entitled "Industrial Pretreatment Program" and dated June 2010; any approved revisions thereto; and the General Pretreatment Regulations (40 CFR Part 403). At a minimum, the Permittee must undertake the following pretreatment implementation activities: a. Enforce categorical pretreatment standards under Section 307(b) and (c) of the Federal Clean Water Act(hereinafter,the Act),prohibited discharge standards as set forth in 40 CFR 403.5, local limits specified in Section 13.06.040 of Ordinance Title 13.06,or state standards,whichever are most stringent or apply at the time of issuance or modification of a local industrial waste discharge permit. Locally-derived limits are defined as pretreatment standards under Section 307(d)of the Act and are not limited to categorical industrial facilities. b. Issue industrial waste discharge permits to all significant industrial users [SIUs, as defined in 40 CFR 403.3(v)(i)(ii)] contributing to the treatment system, including those from other jurisdictions. Industrial waste discharge permits must contain, as a minimum, all the requirements of 40 CFR 403.8 (f)(1)(iii). The Permittee must coordinate the permitting process with Ecology regarding any industrial facility that may possess a State Waste Discharge Permit issued by Ecology. Once issued, an Industrial Waste Discharge Permit takes precedence over a State-issued Waste Discharge Permit. C. Maintain and update, as necessary, records identifying the nature, character, and volume of pollutants contributed by industrial users to the Publicly Owned Treatment Works(POTW). The Permittee must maintain records for at least a three-year period. Page 28 of 59 Permit No. WA0023973 d. Perform inspections, surveillance, and monitoring activities on industrial users to determine or confirm compliance with pretreatment standards and requirements. The Permittee must conduct a thorough inspection of SNs annually. The Permittee must conduct regular local monitoring of SIU wastewaters commensurate with the character and volume of the wastewater but not less than once per year. The Permittee must collect and analyze samples in accordance with 40 CFR Part 403.12(b)(5)(ii)-(v) and 40 CFR Part 136. e. Enforce and obtain remedies for noncompliance by any industrial users with applicable pretreatment standards and requirements. Once it identifies violations, the Permittee must take timely and appropriate enforcement action to address the noncompliance. The Permittee's action must follow its enforcement response procedures and any amendments, thereof. f. Publish, at least annually in the largest daily newspaper in the Permittee's service area, a list of all non-domestic users which, at any time in the previous 12 months, were in significant noncompliance as defined in 40 CFR 403.8(f)(2)(viii). g. If the Permittee elects to conduct sampling of an SI 's discharge in lieu of requiring user self-monitoring,it must satisfy all requirements of 40 CFR Part 403.12. This includes monitoring and record keeping requirements of Sections 403.12(g) and (o). For SNs subject to categorical standards (CIUs),the Permittee may either complete baseline and initial compliance reports for the CIU [when required by 403.12(b) and (d)] or require these of the C1U. The Permittee must ensure that it provides SNs the results of sampling in a timely manner, inform SNs of their right to sample, their obligations to report any sampling they do,to respond to non-compliance, and to submit other notifications. These include a slug load report [403.12(f)],notice of changed discharge [403.120)], and hazardous waste notifications [403.12(p)]. If sampling for the SIU, the Permittee must not sample less than once in every six-month period unless the Permittee's approved program includes procedures for reduction of monitoring for Middle-Tier or Non-Significant Categorical Users per 403.12(e)(2) and (3) and those procedures have been followed. h. Develop and maintain a data management system designed to track the status of the Permittee's industrial user inventory,industrial user discharge characteristics, and compliance status. i. Maintain adequate staff, funds, and equipment to implement its pretreatment program. j. Establish, where necessary, contracts or legally binding agreements with contributing jurisdictions to ensure compliance with applicable pretreatment requirements by commercial or industrial users within these jurisdictions. These contracts or agreements must identify the agency responsible to perform the various implementation and enforcement activities in the contributing jurisdiction. In addition, the Permittee must Page 29 of 59 Permit No. WA0023973 develop a Memorandum of Understanding(or Inter-local Agreement)that outlines the specific roles, responsibilities, and pretreatment activities of each jurisdiction. 2. The Permittee must implement the Accidental Spill Prevention Program described in the approved Industrial Pretreatment Program dated August 7, 1990. 3. The Permittee must evaluate, at least once every two years, whether each Significant Industrial User needs a plan to control slug discharges. For purposes of this section,a slug discharge is any discharge of a non-routine, episodic nature, including but not limited to an accidental spill or non-customary batch discharge. The Permittee must make the results of this evaluation available to Ecology upon request. If the Permittee decides that a slug control plan is needed, the plan must contain, at a minimum, the following elements: a. Description of discharge practices, including non-routine batch discharges. b. Description of stored chemicals. C. Procedures for immediately notifying the Permittee of slug discharges, including any discharge that would violate a prohibition under 40 CFR 403.5(b), with procedures for follow- up written notification within five days. d. If necessary, procedures to prevent adverse impact from accidental spills,including inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operations, control of plant site run-off,worker training,building of containment structures or equipment, measures for containing toxic organic pollutants(including solvents),and/or measures and equipment necessary for emergency response. 4. Whenever Ecology determines that any waste source contributes pollutants to the Permittee's treatment works in violation of Section (b), (c), or (d) of Section 307 of the Act, and the Permittee has not taken adequate corrective action, Ecology will notify the Permittee of this determination. If the Permittee fails to take appropriate enforcement action within 30 days of this notification, Ecology may take appropriate enforcement action against the source or the Permittee. 5. Pretreatment Report The Permittee must provide to Ecology an annual report that briefly describes its program activities during the previous calendar year. The Permittee must submit the annual report to Ecology by April 15th. The report must include the following information: Page 30 of 59 Permit No. WA0023973 a. An updated non-domestic inventory. b. Results of wastewater sampling at the treatment plant as specified in S6.B. The Permittee must calculate removal rates for each pollutant and evaluate the adequacy of the existing local limits in Section 13.06.040 of Ordinance Title 13.06 in prevention of treatment plant interference,pass through of pollutants that could affect receiving water quality, and sludge contamination. C. Status of program implementation,including: • Any substantial modifications to the pretreatment program as originally approved by Ecology, including staffing and funding levels. • Any interference, upset, or permit violations experienced at the POTW that are directly attributable to wastes from industrial users. • Listing of industrial users inspected and/or monitored, and a summary of the results. • Listing of industrial users scheduled for inspection and/or monitoring for the next year, and expected frequencies. • Listing of industrial users notified of promulgated pretreatment standards and/or local standards as required in 40 CFR 403.8(f)(2)(iii). The list must indicate which industrial users are on compliance schedules and the final date of compliance for each. • Listing of industrial users issued industrial waste discharge permits. • Planned changes in the approved local pretreatment program. (See Subsection A.6.below) d. Status of compliance activities,including: • Listing of industrial users that failed to submit baseline monitoring reports or any other reports required under 40 CFR 403.12 and in the Permittee's pretreatment program. • Listing of industrial users that were at any time during the reporting period not complying with federal, state, or local pretreatment standards or with applicable compliance schedules for achieving those standards, and the duration of such noncompliance. • Summary of enforcement activities and other corrective actions taken or planned against non-complying industrial Page 31 of 59 Permit No. WA0023973 users. The Permittee must supply to Ecology a copy of the public notice of facilities that were in significant noncompliance. 6. The Permittee must request and obtain approval from Ecology before making any significant changes to the approved local pretreatment program. The Permittee must follow the procedure in 40 CFR 403.18 (b) and(c). B. Monitoring Requirements The Permittee must: I. Monitor its influent, effluent, and sludge for the priority pollutants identified in Tables II and III of Appendix D of 40 CFR Part 122 as amended, any compounds identified because of Special Condition S6.13.11,and any other pollutants expected from non-domestic sources using U.S. EPA-approved procedures for collection, preservation, storage, and analysis. 2. Test influent, effluent, and sludge samples for the priority pollutant metals (Table III, 40 CFR 122, Appendix D) on a quarterly basis throughout the term of this permit. 3. Test influent,effluent,and sludge samples for the organic priority pollutants(Table II, 40 CFR 122, Appendix D) on an annual basis. The Permittee may use the data collected for application purposes using Appendix A test methods to meet this requirement. 4. Sample POTW influent and effluent on a day when industrial discharges are occurring at normal-to-maximum levels. 5. Obtain 24-hour composite samples for the analysis of acid and base/neutral extractable compounds and metals. 6. Collect grab samples at equal intervals for a total of four grab samples per day for the analysis of volatile organic compounds. The laboratory may run a single analysis for volatile pollutants (Method 624) for each monitoring day by compositing equal volumes of each grab sample directly in the GC purge and trap apparatus in the laboratory, with no less than I ml of each grab included in the composite. 7. Ensure that all reported test data for metals represents the total amount of the constituents present in all phases,whether solid,suspended,or dissolved elemental or combined,including all oxidation states unless otherwise indicated. 8. Handle,prepare, and analyze all wastewater samples taken for GC/MS analysis in accordance with the U.S. EPA Methods 624 and 625 (October 26, 1984). 9. Collect a sludge sample concurrently with a wastewater sample as a single grab of residual sludge. Sludge organic priority pollutant sampling and analysis must conform to U.S. EPA Methods 624 and 625 unless the Permittee requests an alternate method and Ecology has approved. Sludge metals priority pollutant Page 32 of 59 Permit No. WA0023973 sampling and analysis must conform to U.S. EPA SW 846 6000/7000 Series Methods unless the Permittee requests an alternate method and Ecology has approved. 10. Collect grab samples for cyanide,phenols, and oils. Measure hexane soluble oils (or equivalent) only in the influent and effluent. 11. Make a reasonable attempt to identify all other substances and quantify all pollutants shown to be present by gas chromatograph/mass spectrometer(GC/MS) analysis per 40 CFR 136, Appendix A, Methods 624 and 625, in addition to quantifying pH, oil and grease, and all priority pollutants. The Permittee should attempt to make determinations of pollutants for each fraction, which produces identifiable spectra on total ion plots (reconstructed gas chromatograms). The Permittee should attempt to make determinations from all peaks with responses 5 percent or greater than the nearest internal standard. The 5 percent value is based on internal standard concentrations of 30 µg/L, and must be adjusted downward if higher internal standard concentrations are used or adjusted upward if lower internal standard concentrations are used. The Permittee may express results for non-substituted aliphatic compounds as total hydrocarbon content. 12. Use a laboratory whose computer data processing programs are capable of comparing sample mass spectra to a computerized library of mass spectra, with visual confirmation by an experienced analyst. 13. Conduct additional sampling and appropriate testing to determine concentration and variability, and to evaluate trends for all detected substances determined to be pollutants. C. Reporting of Monitoring Results The Permittee must include a summary of monitoring results in the Annual Pretreatment Report. D. Local Limit Development As sufficient data become available, the Permittee, in consultation with Ecology, must reevaluate its local limits in order to prevent pass-through or interference. If Ecology determines that any pollutant present causes pass-through or interference, or exceeds established sludge standards, the Permittee must establish new local limits or revise existing local limits as required by 40 CFR 403.5. Ecology may also require the Permittee to revise or establish local limits for any pollutant discharged from the POTW that has a reasonable potential to exceed the Water Quality Standards, Sediment Standards, or established effluent limits, or causes whole effluent toxicity. Ecology makes this determination in the form of an Administrative Order. Ecology may modify this permit to incorporate additional requirements relating to the establishment and enforcement of local limits for pollutants of concern. Any permit modification is subject to formal due process procedures under state and federal law and regulation. Page 33 of 59 Permit No. WA0023973 S7. SOLID WASTES A. Solid Waste Handling The Permittee must handle and dispose of all solid waste material in such a manner as to prevent its entry into state ground or surface water. B. Leachate The Permittee must not allow leachate from its solid waste material to enter state waters without providing all known, available, and reasonable methods of treatment, nor allow such leachate to cause violations of the State Surface Water Quality Standards, Chapter 173-201A WAC, or the State Ground Water Quality Standards, Chapter 173-200 WAC. The Permittee must apply for a permit or permit modification as may be required for such discharges to state ground or surface waters. S8. APPLICATION FOR PERMIT RENEWAL OR MODIFICATION FOR FACILITY CHANGES The Permittee must submit an application for renewal of this permit by September 1,2020. The Permittee must also submit a new application or supplement at least 180 days prior to commencement of discharges,resulting from the activities listed below,which may result in permit violations. These activities include any facility expansions,production increases, or other planned changes, such as process modifications,in the permitted facility. S9. COMBINED SEWER OVERFLOWS A. Authorized Combined Sewer Overflow (CSO) Discharge Locations Beginning on the effective date of this permit, the Permittee may discharge domestic wastewater from the following list of CSOs outfalls which represent occasional point sources of pollutants as a result of overloading of the combined sewer system during precipitation events. The permit prohibits discharges not caused by precipitation. This permit does not authorize a discharge from a CSO that causes adverse impacts that threaten characteristic uses of the receiving water as identified in the water quality standards, chapter 173-201A WAC. Outfall CSO Location Receiving Water Body Latitude Longitude Number Outfall 9002 Primary Outfall Strait of Juan de Fuca 48.12826 -123.37935 CSO 906 Oak and port Angeles Harbor 48.12167 -123.43389 Railroad CSO 907 Laurel and port Angeles Harbor 48.12111 -123.43139 Railroad Ist/2"d Alley Peabody Creek Culvert, CSO 908 and Lincoln outlet into Port Angeles 48.12028 -123.43000 Harbor Page 34 of 59 Permit No. WA0023973 Outfall CSO Location Receiving Water Body Latitude Longitude Number CSO 910 Francis St Park port Angeles Harbor 48.11722 -123.41694 (East Manhole) B. Nine Minimum Controls In accordance with chapter 173-245 WAC and US EPA CSO control policy(59 FR 18688), the Permittee must implement and document the following nine minimum controls(NMC) for CSOs. The Permittee must document compliance with the NMC in the annual CSO report as required in Special Condition S9.C. The Permittee must comply with the following technology-based requirements; the Permittee must: 1. Implement proper operation and maintenance programs for the sewer system and all CSO outfalls to reduce the magnitude, frequency, and duration of CSOs. The program must consider regular sewer inspections;sewer,catch basin,and regulator cleaning; equipment and sewer collection system repair or replacement, where necessary; and disconnection of illegal connections. 2. Implement procedures that will maximize use of the collection system for wastewater storage that can be accommodated by the storage capacity of the collection system in order to reduce the magnitude, frequency, and duration of CSOs. 3. Review and modify, as appropriate,its existing pretreatment program to minimize CSO impacts from the discharges from non-domestic users. 4. Operate the Permittee's wastewater treatment plant at maximum treatable flow during all wet weather flow conditions to reduce the magnitude, frequency, and duration of CSOs. The Permittee must deliver all flows to the treatment plant within the constraints of the treatment capacity of the POTW. 5. Not discharge (prohibited) overflows from CSO outfalls except as a result of precipitation events. The Permittee must report each dry weather overflow to the permitting authority immediately per Special Condition S3.E. When it detects a dry weather overflow,the Permittee must begin corrective action immediately and inspect the dry weather overflow each subsequent day until it has eliminated the overflow. 6. Implement measures to control solid and floatable materials in CSOs. 7. Implement a pollution prevention program focused on reducing the impact of CSOs on receiving waters. 8. Implement a public notification process to inform the citizens of when and where CSOs occur. The process must include (a) mechanism to alert persons of the occurrence of CSOs and (b) a system to determine the nature and duration of conditions that are potentially harmful for users of receiving waters due to CSOs. Page 35 of 59 Permit No. WA0023973 9. Monitor CSO outfalls to characterize CSO impacts and the efficacy of CSO controls. This data must include: a. Characteristics of the combined sewer system, including the population served by the combined portion of the system and locations of all CSO outfalls in the CSS. b. Total number of CSO events, and the frequency and duration of CSOs for a representative number of events. C. Locations and designated uses of receiving water bodies. d. Any available water quality data for receiving water bodies that the Permittee becomes aware of. e. Water quality impacts directly related to CSO (e.g., beach closing, floatables,wash-up episodes, fish kills). C. Combined Sewer Overflow Annual Report The Permittee must submit a CSO Annual Report to Ecology for review and approval by May 15th of each year. The CSO Annual Report must cover the previous calendar year. The report must comply with the requirements of WAC 173-245-090(1) and must include documentation of compliance with the Nine Minimum Controls for CSOs described in Special Condition S9.B. The CSO Annual report must include the following information: 1. A summary of the number and volume of untreated discharge events per outfall for that year. 2. A summary of the five-year moving average number of untreated discharge events per outfall, calculated once annually. 3. An event-based reporting form (provided by Ecology) for all CSO discharges for the reporting period, summarizing all data collected according to the monitoring schedule in Special Condition S23. 4. An explanation of the previous year's CSO reduction accomplishments. 5. A list of CSO reduction projects planned for the next year. D. Compliance Schedule In order to achieve the greatest reasonable reduction of combined sewer overflows at the earliest possible date,the Permittee must complete the following elements of the approved CSO reduction plan. The Permittee must finish construction, as defined by substantial completion by June 30,2016. Page 36 of 59 Permit No. WA0023973 E. Requirements for Controlled Combined Sewer Overflows 1. Performance Standards for Controlled CSO Outfalls The performance standard for each controlled CSO outfall is not more than one discharge event per outfall per year on average, due to precipitation. For this facility, Ecology has requested that CSO discharges be directed preferentially to Outfall 002, which is offshore, as opposed to the downtown CSO locations. Because of this, Outfall 002 may have up to 1.3 discharge events per year on average, due to precipitation. Ecology evaluates compliance with the performance standard annually based on a five-year moving average. The Permittee must report the running five-year average number of overflow events per year during this permit term from these CSO outfalls in the CSO Annual Report required in Section S9.C. S 10. OUTFALL EVALUATION The Permittee must inspect, at least once each permit term, the submerged portion of the outfall lines(#001 &9002)and diffusers to document their integrity and continued function. If conditions allow for a photographic verification, the Permittee must include such verification in the report. By December 31,2019,the Permittee must submit the inspection report to Ecology. The Permittee must submit hard-copies of any video files to Ecology as required by Permit Condition S3.13 (the Portal does not support submittal of video files). The inspector must at minimum: • Assess the physical condition of the outfall pipes, diffusers, and associated couplings. • Determine the extent of sediment accumulation in the vicinity of the diffusers. • Ensure diffuser ports are free of obstructions and are allowing uniform flow. • Confirm physical location(latitude/longitude)and depth(at MLLW)of the diffuser section of the outfalls. • Assess physical condition of the submarine line. • Assess physical condition of anchors used to secure the submarine line. S 11. ACUTE TOXICITY A. Testing When There is No Permit Limit for Acute Toxicity The Permittee must: 1. Conduct acute toxicity testing on final effluent once in the last summer and once in the last winter prior to submission of the application for permit renewal. 2. Conduct acute toxicity testing on a series of at least five concentrations of effluent, including 100 percent effluent and a control. Page 37 of 59 Permit No. WA0023973 3. Use each of the following species and protocols for each acute toxicity test: Acute Toxicity Tests Species Method Fathead minnow 96-hour pimephales promelas EPA-821-R-02-012 static-renewal test Ceriodaphnia dubia, Daphnid 48-hour static test Daphnia pulex, or EPA-821-R-02-012 Daphnia magna 4. Submit the results to Ecology by Reserved for Issuance(with the permit renewal application). B. Sampling and Reporting Requirements 1. The Permittee must submit all reports for toxicity testing in accordance with the most recent version of Ecology Publication No. WQ-R-95-80, Laboratory Guidance and Whole Effluent Toxicity Test Review Criteria. Reports must contain toxicity data, bench sheets, and reference toxicant results for test methods. In addition, the Permittee must submit toxicity test data in electronic format(CETIS export file preferred) for entry into Ecology's database. 2. The Permittee must collect 24-hour composite effluent samples for toxicity testing. The Permittee must cool the samples to 0 -6 degrees Celsius during collection and send them to the lab immediately upon completion. The lab must begin the toxicity testing as soon as possible but no later than 36 hours after sampling was completed. 3. The laboratory must conduct water quality measurements on all samples and test solutions for toxicity testing, as specified in the most recent version of Ecology Publication No. WQ-R-95-80,Laboratory Guidance and Whole Effluent Toxicity Test Review Criteria. 4. All toxicity tests must meet quality assurance criteria and test conditions specified in the most recent versions of the EPA methods listed in Subsection C and the Ecology Publication No. WQ-R-95-80,Laboratory Guidance and Whole Effluent Toxicity Test Review Criteria. If Ecology determines any test results to be invalid or anomalous,the Permittee must repeat the testing with freshly collected effluent. 5. The laboratory must use control water and dilution water meeting the requirements of the EPA methods listed in Section A or pristine natural water of sufficient quality for good control performance. 6. The Permittee must conduct whole effluent toxicity tests on an unmodified sample of final effluent. 7. The Permittee may choose to conduct a full dilution series test during compliance testing in order to determine dose response. In this case, the series must have a minimum of five effluent concentrations and a control. The series of Page 38 of 59 Permit No. WA0023973 concentrations must include the acute critical effluent concentration(ACEC). The ACEC equals 2.7 percent effluent. 8. All whole effluent toxicity tests, effluent screening tests, and rapid screening tests that involve hypothesis testing must comply with the acute statistical power standard of 29 percent as defined in WAC 173-205-020. If the test does not meet the power standard, the Permittee must repeat the test on a fresh sample with an increased number of replicates to increase the power. S12. CHRONIC TOXICITY A. Testing When There is No Permit Limit for Chronic Toxicity The Permittee must: 1. Conduct chronic toxicity testing on final effluent once in the last winter and once in the last summer prior to submission of the application for permit renewal. 2. Conduct chronic toxicity testing on a series of at least five concentrations of effluent and a control. This series of dilutions must include the acute critical effluent concentration(ACEC). The ACEC equals 2.7 percent effluent. The series of dilutions should also contain the CCEC of 0.2 percent effluent. 3. Compare the ACEC to the control using hypothesis testing at the 0.05 level of significance as described in Appendix H, EPA/600/4-89/001. 4. Submit the results to Ecology Reserved for Issuance (with the permit renewal application). 5. Perform chronic toxicity tests with all of the following species and the most recent version of the following protocols: Saltwater Chronic Test Species Method Topsmelt survival and growth Atherinops affinis EPA/600/R-95/136 Mysid shrimp survival and Ainericainysis Bahia growth (formerly Mysidopsis EPA-821-R-02-014 Bahia) B. Sampling and Reporting Requirements 1. The Permittee must submit all reports for toxicity testing in accordance with the most recent version of Ecology Publication No. WQ-R-95-80, Laboratory Guidance and Whole Effluent Toxicity Test Review Criteria. Reports must contain toxicity data, bench sheets, and reference toxicant results for test methods. In addition, the Permittee must submit toxicity test data in electronic format(CETIS export file preferred) for entry into Ecology's database. 2. The Permittee must collect 24-hour composite effluent samples for toxicity testing. The Permittee must cool the samples to 0 -6 degrees Celsius during collection and Page 39 of 59 Permit No. WA0023973 send them to the lab immediately upon completion. The lab must begin the toxicity testing as soon as possible but no later than 36 hours after sampling was completed. 3. The laboratory must conduct water quality measurements on all samples and test solutions for toxicity testing, as specified in the most recent version of Ecology Publication No. WQ-R-95-80,Laboratory Guidance and Whole Effluent Toxicity Test Review Criteria. 4. All toxicity tests must meet quality assurance criteria and test conditions specified in the most recent versions of the EPA methods listed in Section C.and the Ecology Publication no. WQ-R-95-80, Laboratory Guidance and Whole Effluent Toxicity Test Review Criteria. If Ecology determines any test results to be invalid or anomalous,the Permittee must repeat the testing with freshly collected effluent. 5. The laboratory must use control water and dilution water meeting the requirements of the EPA methods listed in Subsection C. or pristine natural water of sufficient quality for good control performance. 6. The Permittee must conduct whole effluent toxicity tests on an unmodified sample of final effluent. 7. The Permittee may choose to conduct a full dilution series test during compliance testing in order to determine dose response. In this case, the series must have a minimum of five effluent concentrations and a control. The series of concentrations must include the CCEC and the ACEC. The CCEC and the ACEC may either substitute for the effluent concentrations that are closest to them in the dilution series or be extra effluent concentrations. The CCEC equals 0.2 percent effluent. The ACEC equals 2.7 percent effluent. 8. All whole effluent toxicity tests that involve hypothesis testing must comply with the chronic statistical power standard of 39 percent as defined in WAC 173-205- 020.If the test does not meet the power standard,the Permittee must repeat the test on a fresh sample with an increased number of replicates to increase the power. Page 40 of 59 Permit No. WA0023973 GENERAL CONDITIONS G1. SIGNATORY REQUIREMENTS A. All applications,reports,or information submitted to Ecology must be signed and certified. 1. In the case of corporations,by a responsible corporate officer. For the purpose of this section, a responsible corporate officer means: • A president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy or decision making functions for the corporation; or • The manager of one or more manufacturing, production, or operating facilities, provided, the manager is authorized to make management decisions which govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term environmental compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. 2. In the case of a partnership,by a general partner. 3. In the case of sole proprietorship,by the proprietor. 4. In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking elected official. Applications for permits for domestic wastewater facilities that are either owned or operated by, or under contract to, a public entity shall be submitted by the public entity. B. All reports required by this permit and other information requested by Ecology must be signed by a person described above or by a duly authorized representative of that person. A person is a duly authorized representative only if: 1. The authorization is made in writing by a person described above and submitted to Ecology. 2. The authorization specifies either an individual or aposition having responsibility for the overall operation of the regulated facility, such as the position of plant manager, superintendent,position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters. (A duly authorized representative may thus be either a named individual or any individual occupying a named position.) C. Changes to authorization. If an authorization under paragraph GLB, above, is no longer accurate because a different individual or position has responsibility for the overall Page 41 of 59 Permit No. WA0023973 operation of the facility, a new authorization satisfying the requirements of paragraph G1.B, above, must be submitted to Ecology prior to or together with any reports, information, or applications to be signed by an authorized representative. D. Certification. Any person signing a document under this section must make the following certification: "I certify under penalty of law,that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief,true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." G2. RIGHT OF INSPECTION AND ENTRY The Permittee must allow an authorized representative of Ecology, upon the presentation of credentials and such other documents as may be required by law: A. To enter upon the premises where a discharge is located or where any records must be kept under the terms and conditions of this permit. B. To have access to and copy,at reasonable times and at reasonable cost,any records required to be kept under the terms and conditions of this permit. C. To inspect,at reasonable times,any facilities,equipment(including monitoring and control equipment),practices,methods, or operations regulated or required under this permit. D. To sample or monitor, at reasonable times, any substances or parameters at any location for purposes of assuring permit compliance or as otherwise authorized by the Clean Water Act. G3. PERMIT ACTIONS This permit may be modified, revoked and reissued, or terminated either at the request of any interested person(including the Permittee)or upon Ecology's initiative. However,the permit may only be modified,revoked and reissued, or terminated for the reasons specified in 40 CFR 122.62, 40 CFR 122.64 or WAC 173-220-150 according to the procedures of 40 CFR 124.5. A. The following are causes for terminating this permit during its term,or for denying apermit renewal application: 1. Violation of any permit term or condition. 2. Obtaining a permit by misrepresentation or failure to disclose all relevant facts. 3. A material change in quantity or type of waste disposal. Page 42 of 59 Permit No. WA0023973 4. A determination that the permitted activity endangers human health or the environment, or contributes to water quality standards violations and can only be regulated to acceptable levels by permit modification or termination. 5. A change in any condition that requires either a temporary or permanent reduction, or elimination of any discharge or sludge use or disposal practice controlled by the permit. 6. Nonpayment of fees assessed pursuant to RCW 90.48.465. 7. Failure or refusal of the Permittee to allow entry as required in RCW 90.48.090. B. The following are causes for modification but not revocation and reissuance except when the Permittee requests or agrees: 1. A material change in the condition of the waters of the state. 2. New information not available at the time of permit issuance that would have justified the application of different permit conditions. 3. Material and substantial alterations or additions to the permitted facility or activities which occurred after this permit issuance. 4. Promulgation of new or amended standards or regulations having a direct bearing upon permit conditions, or requiring permit revision. 5. The Permittee has requested a modification based on other rationale meeting the criteria of 40 CFR Part 122.62. 6. Ecology has determined that good cause exists for modification of a compliance schedule, and the modification will not violate statutory deadlines. 7. Incorporation of an approved local pretreatment program into a municipality's permit. C. The following are causes for modification or alternatively revocation and reissuance: 1. When cause exists for termination for reasons listed in Al through A7 of this section, and Ecology determines that modification or revocation and reissuance is appropriate. 2. When Ecology has received notification of a proposed transfer of the permit. A permit may also be modified to reflect a transfer after the effective date of an automatic transfer (General Condition G7) but will not be revoked and reissued after the effective date of the transfer except upon the request of the new Permittee. G4. REPORTING PLANNED CHANGES The Permittee must, as soon as possible,but no later than 180 days prior to the proposed changes, give notice to Ecology of planned physical alterations or additions to the permitted facility, production increases, or process modification which will result in: Page 43 of 59 Permit No. WA0023973 A. The permitted facility being determined to be a new source pursuant to 40 CFR 122.29(b). B. A significant change in the nature or an increase in quantity of pollutants discharged. C. A significant change in the Permittee's sludge use or disposal practices. Following such notice, and the submittal of a new application or supplement to the existing application, along with required engineering plans and reports,this permit may be modified, or revoked and reissued pursuant to 40 CFR 122.62(a) to specify and limit any pollutants not previously limited. Until such modification is effective, any new or increased discharge in excess of permit limits or not specifically authorized by this permit constitutes a violation. G5. PLAN REVIEW REQUIRED Prior to constructing or modifying any wastewater control facilities, an engineering report and detailed plans and specifications must be submitted to Ecology for approval in accordance with chapter 173-240 WAC. Engineering reports, plans, and specifications must be submitted at least 180 days prior to the planned start of construction unless a shorter time is approved by Ecology. Facilities must be constructed and operated in accordance with the approved plans. G6. COMPLIANCE WITH OTHER LAWS AND STATUTES Nothing in this permit excuses the Permittee from compliance with any applicable federal, state, or local statutes, ordinances, or regulations. G7. TRANSFER OF THIS PERMIT In the event of any change in control or ownership of facilities from which the authorized discharge emanate, the Permittee must notify the succeeding owner or controller of the existence of this permit by letter, a copy of which must be forwarded to Ecology. A. Transfers by Modification Except as provided in paragraph(2)below,this permit may be transferred by the Permittee to a new owner or operator only if this permit has been modified or revoked and reissued under 40 CFR 122.62(b)(2), or a minor modification made under 40 CFR 122.63(d), to identify the new Permittee and incorporate such other requirements as may be necessary under the Clean Water Act. B. Automatic Transfers This permit may be automatically transferred to a new Permittee if: 1. The Permittee notifies Ecology at least 30 days in advance of the proposed transfer date. 2. The notice includes a written agreement between the existing and new Permittees containing a specific date transfer of permit responsibility, coverage, and liability between them. 3. Ecology does not notify the existing Permittee and the proposed new Permittee of its intent to modify or revoke and reissue this permit. A modification under this Page 44 of 59 Permit No. WA0023973 subparagraph may also be minor modification under 40 CFR 122.63. If this notice is not received, the transfer is effective on the date specified in the written agreement. G8. REDUCED PRODUCTION FOR COMPLIANCE The Permittee,in order to maintain compliance with its permit,must control production and/or all discharges upon reduction, loss, failure, or bypass of the treatment facility until the facility is restored or an alternative method of treatment is provided. This requirement applies in the situation where, among other things, the primary source of power of the treatment facility is reduced, lost, or fails. G9. REMOVED SUBSTANCES Collected screenings, grit, solids, sludges, filter backwash, or other pollutants removed in the course of treatment or control of wastewaters must not be resuspended or reintroduced to the final effluent stream for discharge to state waters. G10. DUTY TO PROVIDE INFORMATION The Permittee must submit to Ecology, within a reasonable time, all information which Ecology may request to determine whether cause exists for modifying, revoking and reissuing, or terminating this permit or to determine compliance with this permit. The Permittee must also submit to Ecology upon request, copies of records required to be kept by this permit. G11. OTHER REQUIREMENTS OF 40 CFR All other requirements of 40 CFR 122.41 and 122.42 are incorporated in this permit by reference. G12. ADDITIONAL MONITORING Ecology may establish specific monitoring requirements in addition to those contained in this permit by administrative order or permit modification. G13. PAYMENT OF FEES The Permittee must submit payment of fees associated with this permit as assessed by Ecology. G14. PENALTIES FOR VIOLATING PERMIT CONDITIONS Any person who is found guilty of willfully violating the terms and conditions of this permit is deemed guilty of a crime, and upon conviction thereof shall be punished by a fine of up to $10,000 and costs of prosecution, or by imprisonment in the discretion of the court. Each day upon which a willful violation occurs may be deemed a separate and additional violation. Any person who violates the terms and conditions of a waste discharge permit may incur, in addition to any other penalty as provided by law, a civil penalty in the amount of up to $10,000 for every such violation. Each and every such violation is a separate and distinct offense, and in case of a continuing violation, every day's continuance is deemed to be a separate and distinct violation. Page 45 of 59 Permit No. WA0023973 G15. UPSET Definition— "Upset"means an exceptional incident in which there is unintentional and temporary noncompliance with technology-based permit effluent limits because of factors beyond the reasonable control of the Permittee. An upset does not include noncompliance to the extent caused by operational error,improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation. An upset constitutes an affirmative defense to an action brought for noncompliance with such technology-based permit effluent limits if the requirements of the following paragraph are met. A Permittee who wishes to establish the affirmative defense of upset must demonstrate, through properly signed, contemporaneous operating logs, or other relevant evidence that: A. An upset occurred and that the Permittee can identify the cause(s) of the upset. B. The permitted facility was being properly operated at the time of the upset. C. The Permittee submitted notice of the upset as required in Special Condition S3.E. D. The Permittee complied with any remedial measures required under S3.E of this permit. In any enforcement action the Permittee seeking to establish the occurrence of an upset has the burden of proof. G16. PROPERTY RIGHTS This permit does not convey any property rights of any sort, or any exclusive privilege. G17. DUTY TO COMPLY The Permittee must comply with all conditions of this permit. Any permit noncompliance constitutes a violation of the Clean Water Act and is grounds for enforcement action; for permit termination,revocation and reissuance, or modification; or denial of a permit renewal application. G18. TOXIC POLLUTANTS The Permittee must comply with effluent standards or prohibitions established under Section 307(a) of the Clean Water Act for toxic pollutants within the time provided in the regulations that establish those standards or prohibitions, even if this permit has not yet been modified to incorporate the requirement. G19. PENALTIES FOR TAMPERING The Clean Water Act provides that any person who falsifies, tampers with, or knowingly renders inaccurate any monitoring device or method required to be maintained under this permit shall,upon conviction, be punished by a fine of not more than $10,000 per violation, or by imprisonment for not more than two years per violation, or by both. If a conviction of a person is for a violation committed after a first conviction of such person under this condition, punishment shall be a fine of not more than $20,000 per day of violation, or by imprisonment of not more than four years, or by both. Page 46 of 59 Permit No. WA0023973 G20. COMPLIANCE SCHEDULES Reports of compliance or noncompliance with, or any progress reports on, interim and final requirements contained in any compliance schedule of this permit must be submitted no later than 14 days following each schedule date. G21. SERVICE AGREEMENT REVIEW The Permittee must submit to Ecology any proposed service agreements and proposed revisions or updates to existing agreements for the operation of any wastewater treatment facility covered by this permit. The review is to ensure consistency with chapters 90.46 and 90.48 RCW as required by RCW 70.150.040(9). In the event that Ecology does not comment within a 30-day period, the Permittee may assume consistency and proceed with the service agreement or the revised/updated service agreement. Page 47 of 59 Permit No. WA0023973 APPENDIX A LIST OF POLLUTANTS WITH ANALYTICAL METHODS,DETECTION LIMITS AND QUANTITA TION LEVELS The Permittee must use the specified analytical methods, detection limits (DLs) and quantitation levels (QLs)in the following table for permit and application required monitoring unless: • Another permit condition specifies other methods, detection levels, or quantitation levels. • The method used produces measurable results in the sample and EPA has listed it as an EPA- approved method in 40 CFR Part 136. If the Permittee uses an alternative method,not specified in the permit and as allowed above,it must report the test method, DL, and QL on the discharge monitoring report or in the required report. If the Permittee is unable to obtain the required DL and QL in its effluent due to matrix effects,the Permittee must submit a matrix-specific detection limit (MDL) and a quantitation limit (QL) to Ecology with appropriate laboratory documentation. When the permit requires the Permittee to measure the base neutral compounds in the list of priority pollutants,it must measure all of the base neutral pollutants listed in the table below. The list includes EPA required base neutral priority pollutants and several additional polynuclear aromatic hydrocarbons(PAHs). The Water Quality Program added several PAHs to the list of base neutrals below from Ecology's Persistent Bioaccumulative Toxics (PBT) List. It only added those PBT parameters of interest to Appendix A that did not increase the overall cost of analysis unreasonably. Ecology added this appendix to the permit in order to reduce the number of analytical "non-detects" in permit-required monitoring and to measure effluent concentrations near or below criteria values where possible at a reasonable cost. The lists below include conventional pollutants (as defined in CWA section 502(6) and 40 CFR Part 122.), toxic or priority pollutants as defined in CWA section 307(a)(1) and listed in 40 CFR Part 122 Appendix D, 40 CFR Part 401.15 and 40 CFR Part 423 Appendix A), and nonconventionals. 40 CFR Part 122 Appendix D (Table V) also identifies toxic pollutants and hazardous substances which are required to be reported by dischargers if expected to be present. This permit appendix A list does not include those parameters. Page 48 of 59 Permit No. WA0023973 CONVENTIONAL PARAMETERS Detection Quantitation Pollutant& CAS No. (if Recommended (DL)i,ug/L Level(QL)Z available) Analytical Protocol unless ugIL unless specified specified Biochemical Oxygen Demand SM5210-B 2 mg/L Chemical Oxygen Demand SM5220-D 10 mg/L Total Organic Carbon SM5310-B/C/D 1 mg/L Total Suspended Solids SM2540-D 5 mg/L Total Ammonia(as N) SM4500-NH3-B and 20 C/D/E/G/H Flow Calibrated device Dissolved oxygen SM4500-OC/OG 0.2 mg/L Temperature (max. 7-day Analog recorder or Use micro-recording devices 0.2°C avg.) known as thermistors pH SM4500-H+B N/A N/A NONCONVENTIONAL PARAMETERS Detection Quantitation D Pollutant& CAS No. (if Recommended (Date tion Level(QL)Z available) Analytical Protocol gg/L unless unless specified specified Total Alkalinity SM2320-B 5 mg/L as CaCO3 Chlorine, Total Residual SM4500 Cl G 50.0 Color SM2120 B/C/E 10 color units Fecal Coliform SM 9221E,9222 N/A Specified in method - sample Page 49 of 59 Permit No. WA0023973 Detection Quantitation D Pollutant& CAS No. (if Recommended (Date tion Level(QL)Z available) Analytical Protocol gg/L unless unless specified specified aliquot dependent Fluoride (16984-48-8) SM4500-F E 25 100 Nitrate +Nitrite Nitrogen (as SM4500-NO3-E/F/H 100 N) Nitrogen, Total Kjeldahl(as SM4500-NorgB/C and N) SM4500NH3- 300 B/C/D/EF/G/H Soluble Reactive Phosphorus SM4500-PE/PF 3 10 (as P) Phosphorus, Total(as P) SM 4500 PB followed 3 10 by SM4500-PE/PF Oil and Grease (HEM) 1664 A or B 1,400 5,000 3 practical Salinity SM2520-B salinity units or scale (PSU or PSS) Settleable Solids SM2540 -F 100 Sulfate (as mg/L SO4) SM4110-B 200 Sulfide (as mg/L S) SM4500-S2F/D/E/G 200 Sulfite (as mg/L SO3) SM4500-SO3B 2000 Specified in Total Coliform SM 9221B, 9222B, N/A method - sample 9223B aliquot dependent Total dissolved solids SM2540 C 20 mg/L Total Hardness SM2340B 200 as CaCO3 Aluminum, Total(7429-90-5) 200.8 2.0 10 Barium Total(7440-39-3) 200.8 0.5 2.0 Page 50 of 59 Permit No. WA0023973 Detection Quantitation D Pollutant& CAS No. (if Recommended (Date tion Level(QL)Z available) Analytical Protocol gg/L unless unless specified specified BTEX(benzene +toluene+ EPA SW 846 1 2 ethylbenzene+m,o,p xylenes) 8021/8260 Boron Total(7440-42-8) 200.8 2.0 10.0 Cobalt, Total(7440-48-4) 200.8 0.05 0.25 Iron, Total(7439-89-6) 200.7 12.5 50 Magnesium, Total(7439-95-4) 200.7 10 50 Molybdenum, Total(7439-98- 200.8 0.1 0.5 7) Manganese, Total(7439-96-5) 200.8 0.1 0.5 NWTPH Dx Ecology NWTPH Dx 250 250 NWTPH Gx Ecology NWTPH Gx 250 250 Tin, Total(7440-31-5) 200.8 0.3 1.5 Titanium, Total(7440-32-6) 200.8 0.5 2.5 PRIORITY POLLUTANTS Detection Quantitation Pollutant& CAS No. (if Recommended Level(QL)Z available) Analytical Protocol (DL) 1491L ugIL unless unless specified specified METALS, CYANIDE &TOTAL PHENOLS Antimony, Total(7440-36-0) 200.8 0.3 1.0 Arsenic, Total(7440-38-2) 200.8 0.1 0.5 Beryllium, Total(7440-41-7) 200.8 0.1 0.5 Cadmium, Total(7440-43-9) 200.8 0.05 0.25 Page 51 of 59 Permit No. WA0023973 Detection Quantitation Pollutant& CAS No. (if Recommended Level(QL)Z available) Analytical Protocol (DL) 1491L ,ugIL unless unless specified specified Chromium(hex) dissolved SM3500-Cr EC 0.3 1.2 (18540-29-9) Chromium, Total(7440-47-3) 200.8 0.2 1.0 Copper, Total(7440-50-8) 200.8 0.4 2.0 Lead, Total(7439-92-1) 200.8 0.1 0.5 Mercury, Total(7439-97-6) 1631E 0.0002 0.0005 Nickel, Total(7440-02-0) 200.8 0.1 0.5 Selenium, Total(7782-49-2) 200.8 1.0 1.0 Silver, Total(7440-22-4) 200.8 0.04 0.2 Thallium, Total(7440-28-0) 200.8 0.09 0.36 Zinc, Total(7440-66-6) 200.8 0.5 2.5 Cyanide, Total(57-12-5) 335.4 5 10 Cyanide, Weak Acid SM4500-CN I 5 10 Dissociable Cyanide, Free Amenable to Chlorination(Available SM4500-CN G 5 10 Cyanide) Phenols, Total EPA 420.1 50 ACID COMPOUNDS 2-Chlorophenol(95-57-8) 625 1.0 2.0 2,4-Dichlorophenol(120-83-2) 625 0.5 1.0 2,4-Dimethylphenol(105-67- 625 0.5 1.0 9) 4,6-dinitro-o-cresol(534-52-1) 625/1625B 1.0 2.0 (2-methyl-4,6,-dinitrophenol) Page 52 of 59 Permit No. WA0023973 Detection Quantitation Pollutant& CAS No. (if Recommended Level(QL)Z available) Analytical Protocol (DL) 1491L ,ugIL unless unless specified specified 2,4 dinitrophenol(51-28-5) 625 1.0 2.0 2-Nitrophenol(88-75-5) 625 0.5 1.0 4-nitrophenol(100-02-7) 625 0.5 1.0 Parachlorometa cresol(59-50- 7) 625 1.0 2.0 (4-chloro-3-methylphenol) Pentachlorophenol(87-86-5) 625 0.5 1.0 Phenol(108-95-2) 625 2.0 4.0 2,4,6-Trichlorophenol(88-06- 625 2.0 4.0 2) VOLATILE COMPOUNDS Acrolein(107-02-8) 624 5 10 Acrylonitrile (107-13-1) 624 1.0 2.0 Benzene (71-43-2) 624 1.0 2.0 Bromoform(75-25-2) 624 1.0 2.0 Carbon tetrachloride (56-23-5) 624/601 or SM6230B 1.0 2.0 Chlorobenzene (108-90-7) 624 1.0 2.0 Chloroethane (75-00-3) 624/601 1.0 2.0 2-Chloroethylvinyl Ether 624 1.0 2.0 (110-75-8) Chloroform (67-66-3) 624 or SM6210B 1.0 2.0 Dibromochloromethane 624 1.0 2.0 (124-48-1) 1,2-Dichlorobenzene (95-50-1) 624 1.9 7.6 Page 53 of 59 Permit No. WA0023973 Detection Quantitation Pollutant& CAS No. (if Recommended Level(QL)Z available) Analytical Protocol (DL) IU91L ,ugIL unless unless specified specified 1,3-Dichlorobenzene (541-73- 624 1.9 7.6 1) 1,4-Dichlorobenzene (106-46- 624 4.4 17.6 7) Dichlorobromomethane (75- 624 1.0 2.0 27-4) 1,1-Dichloroethane (75-34-3) 624 1.0 2.0 1,2-Dichloroethane (107-06-2) 624 1.0 2.0 1,1-Dichloroethylene (75-35- 624 1.0 2.0 4) 1,2-Dichloropropane (78-87-5) 624 1.0 2.0 1,3-dichloropropene (mixed isomers) (1,2- 624 1.0 2.0 dichloropropylene) (542-75-6) 3 Ethylbenzene (100-41-4) 624 1.0 2.0 Methyl bromide (74-83-9) 624/601 5.0 10.0 (Bromomethane) Methyl chloride (74-87-3) (Chloromethane) 624 1.0 2.0 Methylene chloride (75-09-2) 624 5.0 10.0 1,1,2,2-Tetrachloroethane 624 1.9 2.0 (79-34-5) Tetrachloroethylene (127-18- 624 1.0 2.0 4) Toluene (108-88-3) 624 1.0 2.0 1,2-Trans-Dichloroethylene 624 1.0 2.0 Page 54 of 59 Permit No. WA0023973 Detection Quantitation Pollutant& CAS No. (if Recommended Level(QL)Z available) Analytical Protocol (DL) IU91L ,ugIL unless unless specified specified (156-60-5) (Ethylene dichloride) 1,1,1-Trichloroethane (71-55- 624 1.0 2.0 6) 1,1,2-Trichloroethane (79-00- 624 1.0 2.0 5) Trichloroethylene (79-01-6) 624 1.0 2.0 Vinyl chloride (75-01-4) 624/SM6200B 1.0 2.0 BASE/NEUTRAL COMPOUNDS(compounds in bold are Ecology PBTs) Acenaphthene (83-32-9) 625 0.2 0.4 Acenaphthylene (208-96-8) 625 0.3 0.6 Anthracene (120-12-7) 625 0.3 0.6 Benzidine (92-87-5) 625 12 24 Benzyl butyl phthalate (85-68- 625 0.3 0.6 7) Benzo(a)anthracene (56-55-3) 625 0.3 0.6 Benzo(b)fluoranthene (3,4-benzofluoranthene) (205- 610/625 0.8 1.6 99-2) 4 Benzoo)fluoranthene (205- 625 0.5 1.0 82-3) 4 Benzo(k)fluoranthene (11,12-benzofluoranthene) 610/625 0.8 1.6 (207-08-9) 4 Benzo(r,s,t)pentaphene 625 0.5 1.0 (189-55-9) Benzo(a)pyrene (50-32-8) 610/625 0.5 1.0 Page 55 of 59 Permit No. WA0023973 Detection Quantitation Pollutant& CAS No. (if Recommended Level(QL)Z available) Analytical Protocol (DL) IU91L ,ugIL unless unless specified specified Benzo(ghi)Perylene (191-24- 610/625 0.5 1.0 2) Bis(2-chloroethoxy)methane 625 5.3 21.2 (111-91-1) Bis(2-chloroethyl)ether(111- 611/625 0.3 1.0 44-4) Bis(2-chloroisopropyl)ether 625 0.3 0.6 (39638-32-9) Bis(2-ethy1hexy0phthalate 625 0.1 0.5 (117-81-7) 4-Bromophenyl phenyl ether 625 0.2 0.4 (101-55-3) 2-Chloronaphthalene (91-58-7) 625 0.3 0.6 4-Chlorophenyl phenyl ether 625 0.3 0.5 (7005-72-3) Chrysene (218-01-9) 610/625 0.3 0.6 Dibenzo (a,h)acridine (226- 610M/625M 2.5 10.0 36-8) Dibenzo (a,j)acridine (224- 610M/625M 2.5 10.0 42-0) Dibenzo(a-h)anthracene (53-70-3)(1,2,5,6- 625 0.8 1.6 dibenzanthracene) Dibenzo(a,e)pyrene (192-65-4) 610M/625M 2.5 10.0 Dibenzo(a,h)pyrene (189-64-0) 625M 2.5 10.0 3,3-Dichlorobenzidine (91-94- 605/625 0.5 1.0 1) Diethyl phthalate (84-66-2) 625 1.9 7.6 Page 56 of 59 Permit No. WA0023973 Detection Quantitation Pollutant& CAS No. (if Recommended Level(QL)Z available) Analytical Protocol (DL) IU91L ,ugIL unless unless specified specified Dimethyl phthalate (131-11-3) 625 1.6 6.4 Di-n-butyl phthalate (84-74-2) 625 0.5 1.0 2,4-dinitrotoluene (121-14-2) 609/625 0.2 0.4 2,6-dinitrotoluene (606-20-2) 609/625 0.2 0.4 BASE/NEUTRAL COMPOUNDS(compounds in bold are Ecology PBTs) Di-n-octylphthalate (117-84- 0) 625 0.3 0.6 1,2-Diphenylhydrazine (as 1625B 5.0 20 Azobenzene) (122-66-7) Fluoranthene (206-44-0) 625 0.3 0.6 Fluorene (86-73-7) 625 0.3 0.6 Hexachlorobenzene (118-74-1) 612/625 0.3 0.6 Hexachlorobutadiene (87-68- 625 0.5 1.0 3) Hexachlorocyclopentadiene 1625B/625 0.5 1.0 (77-47-4) Hexachloroethane (67-72-1) 625 0.5 1.0 Indeno(l,2,3-ca)Pyrene 610/625 0.5 1.0 (193-39-5) Isophorone (78-59-1) 625 0.5 1.0 3-Methyl cholanthrene (56- 625 2.0 8.0 49-5) Naphthalene (91-20-3) 625 0.3 0.6 Nitrobenzene (98-95-3) 625 0.5 1.0 Page 57 of 59 Permit No. WA0023973 Detection Quantitation Pollutant& CAS No. (if Recommended Level(QL)Z available) Analytical Protocol (DL) 1U91L ,ugIL unless unless specified specified N-Nitrosodimethylamine (62- 607/625 2.0 4.0 75-9) N-Nitrosodi-n-propylamine 607/625 0.5 1.0 (621-64-7) N-Nitrosodiphenylamine (86- 625 0.5 1.0 30-6) Perylene (198-55-0) 625 1.9 7.6 Phenanthrene (85-01-8) 625 0.3 0.6 Pyrene (129-00-0) 625 0.3 0.6 1,2,4-Trichlorobenzene 625 0.3 0.6 (120-82-1) DIOXIN 2,3,7,8-Tetra-Chlorodibenzo- P-Dioxin(176-40-16) (2,3,7,8 1613B 1.3 pg/L 5 pg/L TCDD) PESTICIDES/PCBs Aldrin(309-00-2) 608 0.025 0.05 alpha-BHC(319-84-6) 608 0.025 0.05 beta-BHC(319-85-7) 608 0.025 0.05 gamma-BHC(58-89-9) 608 0.025 0.05 delta-BHC(319-86-8) 608 0.025 0.05 Chlordane (57-74-9) 5 608 0.025 0.05 4,4'-DDT(50-29-3) 608 0.025 0.05 4,4'-DDE(72-55-9) 608 0.025 0.0510 4,4' DDD (72-54-8) 608 0.025 0.05 Page 58 of 59 Permit No. WA0023973 Detection Quantitation Pollutant& CAS No. (if Recommended Level(QL)Z available) Analytical Protocol (DL) 1U91L ,ugIL unless unless specified specified Dieldrin(60-57-1) 608 0.025 0.05 alpha-Endosulfan(959-98-8) 608 0.025 0.05 beta-Endosulfan(33213-65-9) 608 0.025 0.05 Endosulfan Sulfate (1031-07- 608 0.025 0.05 8) Endrin(72-20-8) 608 0.025 0.05 Endrin Aldehyde (7421-93-4) 608 0.025 0.05 Heptachlor(76-44-8) 608 0.025 0.05 Heptachlor Epoxide (1024-57- 608 0.025 0.05 3) PCB-1242 (53469-21-9) 6 608 0.25 0.5 PCB-1254 (11097-69-1) 608 0.25 0.5 PCB-1221 (11104-28-2) 608 0.25 0.5 PCB-1232 (11141-16-5) 608 0.25 0.5 PCB-1248 (12672-29-6) 608 0.25 0.5 PCB-1260 (11096-82-5) 608 0.13 0.5 PCB-1016 (12674-11-2) 6 608 0.13 0.5 Toxaphene (8001-35-2) 608 0.24 0.5 1. Detection level(DL)or detection limit means the minimum concentration of an analyte(substance) that can be measured and reported with a 99 percent confidence that the analyte concentration is greater than zero as determined by the procedure given in 40 CFR part 136, Appendix B. 2. Quantitation Level(QL) also known as Minimum Level of Quantitation (ML) — The lowest level at which the entire analytical system must give a recognizable signal and acceptable calibration point for the analyte. It is equivalent to the concentration of the lowest calibration standard, assuming that the lab has used all method-specified sample weights, volumes, and cleanup procedures. The QL is calculated by multiplying the MDL by 3.18 and rounding the result to the Page 59 of 59 Permit No. WA0023973 number nearest to (1, 2, or 5) x 10", where n is an integer. (64 FR 30417). ALSO GIVEN AS: The smallest detectable concentration of analyze greater than the Detection Limit(DL) where the accuracy(precision&bias)achieves the objectives of the intended purpose. (Report of the Federal Advisory Committee on Detection and Quantitation Approaches and Uses in Clean Water Act Programs Submitted to the US Environmental Protection Agency December 2007). 3. Soluble Biochemical Oxygen Demand method note: First, filter the sample through a Millipore Nylon filter (or equivalent) - pore size of 0.45-0.50 um (prep all filters by filtering 250 ml of laboratory grade deionized water through the filter and discard). Then, analyze sample as per method 5210-B. 4. NWTPH Dx Northwest Total Petroleum Hydrocarbons Diesel Extended Range — see htlp://www.ecy.wa.gov/biblio/97602.html 5. NWTPH Gx - Northwest Total Petroleum Hydrocarbons Gasoline Extended Range — see htlp://www.ecy.wa.gov/biblio/97602.html 6. 1, 3-dichloroproylene mixed isomers)You may report this parameter as two separate parameters: cis-1, 3-dichlorpropropene (10061-01-5) and trans-1, 3-dichloropropene (10061-02-6). 7. Total Benzofluoranthenes - Because Benzo(b)fluoranthene, Benzo(j)fluoranthene and Benzo(k)fluoranthene co-elute you may report these three isomers as total benzofluoranthenes. 8. Chlordane — You may report alpha-chlordane (5103-71-9) and gamma-chlordane (5103-74-2) in place of chlordane (57-74-9). If you report alpha and gamma-chlordane, the DL/PQLs that apply are 0.025/0.050. 9. PCB 1016&PCB 1242—You may report these two PCB compounds as one parameter called PCB 1016/1242. PAPER WASTEWATER TREATMENT PL T DISCHARGE CHARG ITORIN G REPORT Permit No. WA0023973 Month Year Facility blame City of Part Angeles County � Clallam _v Deceiving Water Strait of Juan cle Fuca _._ Plant Operator tl � Plant Type Trickling Filter/Solids Contact with Chlorine Disinfection Population INFLUENT _ EFFLUENT Frequency CONT 2lUVEEK 2NWEEK 21 WEEK 21WEEK 2/WEEK 2/WEEK 2/WEEK 2/WEEK DAILY 31WEEK DAILY DAILY _ w a Q a Q oa Cr W W z ¢ < a Q ¢ m z a c°r d v a Lo to ¢ a LO w a ¢ w d cC � W w �, 0 n , M 0 � o C) a a , c� d a � <t o z o- W a Ct in rn cn cn a a Of a co cn u> W 0 c 5 -- U o Cale c7 m a m m r!r °� ua m m c� m w m cn cn w v> m z w ..: 0 w w U C C 7 _, _:f U U 0- U ._J n C? w vy n 1 2 7 8 - 9 10 11 13 15 16 __ 17 18 19 _ 20 22 24 25 26 27 28 mu AVG wnmwewwmm AVG',m,muowmm,mmm' AVG AVG 'AVG AWG hVG .AVG AWC3 remx AVG "�� NWG �'�"" AVG"' w CEM - MINm AVG F ro l 0e8 RE PC�DT 0 1 FtE r 50 2 85 9�R5' 0 85 1 0 0a5N0 m� 00 O.0 I�EPOD MAX MAx MA. MF,k; MAX AVW Am AVVM AVW -M:1.D GP47 MAX WD � REPO ... mm mmiwenmow mm L tt7t REPOT DLPODT' F1=} Oi RE OR I EPtDI S 5b ,� 4k DEF'CR Phase Circle ALL Permit Violations Mail to P.O. Box 47775, Olympia WA 98504-7775 AVG=Average AVW=Highest Weekly Average GEM=Geometric Mean MAX=Maximum MAIN=Minimurn Gl'M7=highest 7-day Geometric Mean I certify under penalty of lamp,that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that gUalified personnel properly gather and evaluate the information SUbmitted. Based on my Inquiry of the person or persons wl*manage the system or those persons directly responsible for gathering information,Ora inforration submitted is,to the best of my knowledge and belief,true,accurate,and complete. I am aware that there are significant penalties for submitting false information,including the possibility of fine and imprisonment for knowing violations. ,.per �.�,, ,.. �.-m. � ,�.. ,,� �n,.�°°<-,.,- .�u,°°°°„ °.��w�° .,�.�°°�m,� ,n, ,,,, �zk,,..�,,,..� ,°:��°,-, m ,�.,�,...��°;,��.°„,°,°�.�. ��. .,,...,�. ICJ m�� nci I..itle `ignatwe PAPER WASTEWATER TREATMENT PLANT DISCHARGE MONITORING REPORT Permit No. WA0023973 Month Year Facility blame City of Port Angeles _ County Clallam Receiving Water Strait of Juan de Fuca Plant Operator Plant Type Trickling Filter/Solids Contact with Chlorine Disinfection Population EFFLUENT Chi#002 � CSC)#06� Frequency 11WEEK 1/30' 1/30" 1/30` 1/30° 11EVENT 1/EVENT VEVENT 1 1EVENT VEVENT 1 1EVENT VEVENT VEVENT 1/EVENT 1 1EVENT z a z W W ¢ 6 O O O Q O u -¢ O CL o U ) o Z � f— O < fcc—[[ O u) O Z n a J C] F— U C7 CC F Z U � W () ¢ o + a U) U) >d a o Q o o a D- I(') UWI U) W U) U) U Z b Z O W Z Z O 4 -C Q ° O �o O Ui O d U W � O i PAPER WASTEWATER TREATMENT PLANT DISCHARGE MONITORING REPORT Permit No. vvA0023e73 Month Year Facility Name City of Port Angeles County Ciallam Receiving Water Strait of Juan de Fuca Plant Operator Plant -) LI ate z TOTAL TOTAL TOTAL TOTAL TOTAL TOTAL T TT.."tl-(57-�L T'TA TO TOM TOTAL Limits REPOREEPO�T R' Please Circle ALL Permit Violations Mail to P,O. Box 47775, Olympia wxAye*n4-/T7s AvG=AvemgeAVVY=Highest Weekly Average GEM=G*nmethuMean M4&=Maximum MIG=Minimum swmr=xig»ost7-day Geometric Mean /cs�rm under penp*mlaw,that this uvzu"mm and all attachments were prepared under m'mfem*"o,supervision m,onma"we w�m"s'*°~designed*assure that qualified personnel properly gathered aria evaluated the information submitted. Based or)Try inquiry m the person=persons who manage the system w those persons directly°sp" mmcuxnamn»"u/omr"mmn.me/m"rm=w"Su*".med.s,m'heunm m�'x"=/oon°and belief,true,accurate,anal"^;Tln/°.°. /"=aware that there are significant penalties for submitting false information,including the possibility u/n"°and imprisonment for knowing./mo,/""s Tr PAPER WASTEWATER TREATME14T PLANT DISCHARGE MONITORING REPORT Permit No. WA0023973 Month Year .Facility Name City of Port County Clallarn Receiving Water Strait of Juan de Fuca Plant Operator Plant Type Trickling Filter/Solids Contact with Chlorine Disinfection Population AFTER TWO YEARS OF MONITORING MONTHLY,MONITOR THE FOLLOWING QUARTERLY STARTING APRIL 1, 2018 QUARTERLY MONITORING PARAMETER UNITS EFFLUENT 'TOTAL PHOSPHORUS MG/L SOLUBLE REACTIVE PHOSPHORUS MG/L NITRATE + NITRITE AS N MG/L TOTAL KJELDAHL NITROGEN MG/L DATE SAMPLED QUARTERLY IS DEFINED AS: JANUARY- MARCH, APRIL - JUNE, JULY- SEPTEMBER, & OCTOBER - DECEMBER I certify under penalty of law,that this document and all attachments were prepared under my direction Or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information,the information submitted is,to the best of my knowledge and belief,true,accurate,and complete. I am aware that there are significant penalties for submitting false information,including the possibility of fine and imprisonment for knowing violations. Name and Title Signature PAPER WASTEWATERTREATM ENT PLANT DISCHARGE ET R G REPORT Permit too, WA0023973 Month Year Facility dame City of Port Angeles County Clallam Receiving Water Strait of Juan de Fuca _ Plant Operator Plant Type Trickling Filter/Solids Contact with Chlorine Disinfection Population ANNUAL MONITORING PARAMETER NITS` EFFLUENT BOD 5-DAY MG/L DISSOLVED OXYGEN MG/L OIL & GREASE MG/L TOTAL DISSOLVED SOLIDS MG/L __ TOTAL HARDNESS MG/L CYANIDE MG/L TOTAL PHENOLIC COMPOUNDS MG/L _ _W DATE SAMPLED ANNUAL IS DEFINED AS: JANUARY- DECEMBER. STARTING JANUARY 1, 2017 I certify under penalty of law.that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information,the information submitted is,to the best of my knowledge and belief,true,accurate,and complete. I am aware that there are significant penalties for submitting false information,including the possibility of fine and imprisonment for knowing violations, Name and Title Signature FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT WA0023973 Purpose of this Fact Sheet This fact sheet explains and documents the decisions the Department of Ecology (Ecology) made in drafting the proposed National Pollutant Discharge Elimination System (NPDES) permit for the city of Port Angeles Wastewater Treatment Plant. This fact sheet complies with Section 173-220-060 of the Washington Administrative Code (WAC), which requires Ecology to prepare a draft permit and accompanying fact sheet for public evaluation before issuing an NPDES permit. Ecology makes the draft permit and fact sheet available for public review and comment at least 30 days before issuing the final permit. Copies of the fact sheet and draft permit for the city of Port Angeles, NPDES permit WA0023973, are available for public review and comment. For more details on preparing and filing comments about these documents,please see Appendix A-Public Involvement Information. The city of Port Angeles reviewed the draft permit and fact sheet for factual accuracy. Ecology corrected any errors or omissions regarding the facility's location, history, wastewater discharges, or receiving water prior to publishing this draft fact sheet for public notice. After the public comment period closes, Ecology will summarize substantive comments and provide responses to them. Ecology will include the summary and responses to comments in this fact sheet as Appendix E - Response to Comments, and publish it when issuing the final NPDES permit. Ecology generally will not revise the rest of the fact sheet. The full document will become part of the legal history contained in the facility's permit file. Summary The city of Port Angeles operates a wastewater treatment plant that discharges to the Strait of Juan de Fuca. Ecology issued the previous permit for this facility on July 15, 2008. The permit was modified on August 19, 2010. The proposed permit contains the same effluent limits for five-day Carbonaceous Biological Demand (CBOD5), Total Suspended Solids (TSS), Fecal Coliform Bacteria, and pH as the permit issued in 2008. The proposed permit includes revised limits for Total Residual Chlorine due to the change in discharge location and the use of the old industrial outfall (Outfall 9002) as the new main outfall. Also, due to Whole Effluent Toxicity (WET) testing results, the limit for Acute WET was removed. The permit does not include any other significant changes. This permit does transition the facility to using the new Combined Sewer Overflow (CSO) facilities, including the new outfall (Outfall 9002), the CSO storage tank, and the new influent and effluent diversion structures. With the use of these new facilities and completion of Phase 2 of the CSO reductions, the number and amount of CSO discharges should be greatly reduced during the term of this permit. 1/7/16 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 TABLE OF CONTENTS I. INTRODUCTION...........................................................................................................................1 II. BACKGROUND INFORMATION ................................................................................................2 A. Facility Description.............................................................................................................4 History...................................................................................................................4 Collection System Status.......................................................................................5 TreatmentProcesses ..............................................................................................6 Solid Wastes/Residual Solids ................................................................................8 DischargeOutfall...................................................................................................8 B. Description of the Receiving Water....................................................................................8 C. Wastewater Influent Characterization.................................................................................9 D. Wastewater Effluent Characterization................................................................................9 E. Summary of Compliance with Previous Permit Issued ....................................................10 F. State Environmental Policy Act(SEPA) Compliance......................................................11 III. PROPOSED PERMIT LIMITS.....................................................................................................11 A. Design Criteria..................................................................................................................l l B. Technology-Based Effluent Limits...................................................................................12 C. Surface Water Quality-Based Effluent Limits..................................................................14 Numerical Criteria for the Protection of Aquatic Life and Recreation................14 Numerical Criteria for the Protection of Human Health......................................14 NarrativeCriteria.................................................................................................15 Antidegradation ...................................................................................................15 Combined Sewer Overflows................................................................................16 MixingZones.......................................................................................................16 D. Designated Uses and Surface Water Quality Criteria.......................................................21 E. Water Quality Impairments...............................................................................................22 F. Evaluation of Surface Water Quality-Based Effluent Limits for Narrative Criteria........22 G. Evaluation of Surface Water Quality-Based Effluent Limits for Numeric Criteria..........23 H. Human Health...................................................................................................................27 I. Sediment Quality ..............................................................................................................27 J. Whole Effluent Toxicity...................................................................................................28 K. Groundwater Quality Limits.............................................................................................29 L. Comparison of Effluent Limits with the Previous Permit Issued on July 15, 2008..........29 IV. MONITORING REQUIREMENTS..............................................................................................30 A. Wastewater Monitoring ....................................................................................................30 B. Lab Accreditation .............................................................................................................31 C. Effluent Limits which are Near Detection or Quantitation Levels...................................31 1/7/16 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 V. OTHER PERMIT CONDITIONS.................................................................................................31 A. Reporting and Record Keeping.........................................................................................31 B. Prevention of Facility Overloading...................................................................................32 C. Operation and Maintenance..............................................................................................32 D. Pretreatment......................................................................................................................32 Duty to Enforce Discharge Prohibitions..............................................................32 E. Solid Wastes .....................................................................................................................33 F. Combined Sewer Overflows (CSO)..................................................................................34 CSO Reduction Plan/Long-Term Control Plan and CSO Reduction Plan Amendments...........................................................................................34 Nine Minimum Controls......................................................................................34 CSOMonitoring ..................................................................................................35 AnnualCSO Report.............................................................................................35 Post-Construction Monitoring Program...............................................................35 G. Outfall Evaluation.............................................................................................................36 H. General Conditions...........................................................................................................36 VI. PERMIT ISSUANCE PROCEDURES .........................................................................................36 A. Permit Modifications ........................................................................................................36 B. Proposed Permit Issuance.................................................................................................36 VII. REFERENCES FOR TEXT AND APPENDICES........................................................................36 APPENDIX A--PUBLIC INVOLVEMENT INFORMATION.................................................................38 APPENDIX B --YOUR RIGHT TO APPEAL...........................................................................................39 APPENDIXC--GLOSSARY .....................................................................................................................40 APPENDIX D--TECHNICAL CALCULATIONS....................................................................................48 APPENDIX E--RESPONSE TO COMMENTS.........................................................................................49 Table 1 General Facility Information...........................................................................................................2 Table2 Ambient Background Data.............................................................................................................9 Table3 Violations...................................................................................................................................... 10 Table 4 Design Criteria for the Port Angeles WWTP................................................................................ 12 Table 5 Technology-based Limits.............................................................................................................. 13 Table 6 Technology-based Mass Limits.................................................................................................... 14 Table 7 Critical Conditions Used to Model the Discharge ........................................................................18 Table 8 Marine Aquatic Life Uses and Associated Criteria......................................................................22 Table9 Recreational Uses .........................................................................................................................22 Table 10 Dilution Factors (DF) for Outfall 001.........................................................................................24 1/7/16 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Table 11 Dilution Factors (DF) for Outfall 002.........................................................................................28 Table 12 Comparison of Previous and Proposed Effluent Limits..............................................................29 Table13 Accredited Parameters................................................................................................................31 Figure1 Facility Location Map ...................................................................................................................3 1/7/16 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 L INTRODUCTION The Federal Clean Water Act(FCWA, 1972, and later amendments in 1977, 1981, and 1987) established water quality goals for the navigable (surface)waters of the United States. One mechanism for achieving the goals of the Clean Water Act is the National Pollutant Discharge Elimination System (NPDES), administered by the federal Environmental Protection Agency (EPA). The EPA authorized the state of Washington to manage the NPDES permit program in our state. Our state legislature accepted the delegation and assigned the power and duty for conducting NPDES permitting and enforcement to Ecology. The Legislature defined Ecology's authority and obligations for the wastewater discharge permit program in 90.48 Revised Code of Washington (RCW). The following regulations apply to domestic wastewater NPDES permits: Procedures the Department of Ecology (Ecology) follows for issuing NPDES permits [chapter 173-220 Washington Administrative Code (WAC)] Technical criteria for discharges from municipal wastewater treatment facilities (chapter 173-221 WAC) • Water quality criteria for surface waters (chapter 173-201A WAC) • Water quality criteria for groundwaters (chapter 173-200 WAC) Whole effluent toxicity testing and limits (chapter 173-205 WAC) • Sediment management standards (chapter 173-204 WAC) • Submission of plans and reports for construction of wastewater facilities (chapter 173-240 WAC) The following additional regulations apply to communities operating collection systems with Combined Sewer Overflows (CSOs): • Submission of plans and reports for construction and operation of Combined Sewer Overflow reduction facilities (chapter 173-245 WAC) • US EPA CSO control policy(59 FR 18688) These rules require any treatment facility owner/operator to obtain an NPDES permit before discharging wastewater to state waters. They also help define the basis for limits on each discharge and for requirements imposed by the permit. Under the NPDES permit program and in response to a complete and accepted permit application, Ecology must prepare a draft permit and accompanying fact sheet, and make them available for public review before final issuance. Ecology must also publish an announcement (public notice) telling people where they can read the draft permit, and where to send their comments, during a period of thirty days (WAC 173-220-050). (See Appendix A-Public Involvement Information for more detail about the public notice and comment procedures). After the public comment period ends, Ecology may make changes to the draft NPDES permit in response to comment(s). Ecology will summarize the responses to comments and any changes to the permit in Appendix E. 1/7/16 Page 1 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 IL BACKGROUND INFORMATION Table 1 General Facility Information Facility Information City of Port Angeles Applicant 321 East 5' Street Port Angeles, WA 98362 Port Angeles Wastewater Treatment Plant Facility Name and Address 1509 East Columbia Street Port Angeles, WA 98362 Name: Jeff D. Young Contact at Facility Telephone #: 360-417-4845 Cell#: 360-461-1044 Email: 'yours a)ci ofpa.us Name: Dan McKeen Title: City Manager Responsible Official Address: 321 East 5t' Street Telephone #: 360-417-4501 FAX#: 360-417-4509 Type of Treatment Secondary(Trickling Filter/Solids Contact/Chlorine) Facility Location (NAD83/WGS84 reference Latitude: 48.11113 datum) Longitude: -123.40215 Outfall 001 Outfall 002 Discharge Waterbody Name and Location Port Angeles Harbor Strait of Juan de Fuca (NAD83/WGS84 reference datum) Latitude: 48.12722 48.12826 Longitude: -123.39806 -123.37935 Permit Status Issuance Date of Previous Permit July 15, 2008 Application for Permit Renewal Submittal Date March 29, 2013 Inspection Status Date of Last Non-sampling Inspection September 9,2014 1/7/16 Page 2 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Figure 1 Facility Location Map di V400vt, s Dorf . 0 flarbor 0 bb l ISIS .igqY ri u CO afigrairlent " w � , M �. / X10`1 Ap T P Iowa 1 (is Hwy 1 , 1/7/16 Page 3 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 NO �r f l/� l� A. Facility Description History The city of Port CityAngeles Wastewater Treatment Plant(WWTP) was built in 1968-69 as a primary wastewater treatment facility. The facility consisted of a grit chamber, a barminutor (bar screen with comminutor), one primary clarifier, and a chlorinator. Two anaerobic digesters in series stabilized sludge prior to land application or drying for landfill disposal. The WWTP was upgraded to a secondary treatment facility in 1994. The upgraded facility consisted of two bar screens (one mechanically cleaned and one manually cleaned), one grit chamber, two primary clarifiers, two trickling filters, one solids contact tank, one solids reaeration tank, two secondary clarifiers, two chlorine contact basins, and a dechlorinator. Sludge was processed with a gravity thickener, two anaerobic digesters, and a belt filter press. Biosolids were hauled to the city of Port Angeles's (City) composting facility where they were composted and/or stored for land application. 1/7/16 Page 4 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 In 2013 and 2014, as part of its CSO Reduction Plan, certain improvements were made at the WWTP. The CSO Reduction Plan and several changes to the City's collection system are discussed in the next section of this document (Collection System Status). Improvements at the WWTP include the following items. • Conversion of an existing 5 million gallon (MG) tank, located on the former industrial site previously occupied by the Rayonier Pulp and Paper Mill, for use as a temporary CSO storage tank. • Construction of a new influent diversion structure (IDS) upstream of the headworks. This structure allows the WWTP to split flows from the collection system between the treatment plant and the newly refurbished CSO storage tank. • Installation of two, 1/4-inch mechanically cleaned bar rack systems in parallel at the headworks. These units replaced the previous bar screen systems and provide redundancy for the screening process. • The launders in the rectangular primary clarifier were raised in order to avoid submergence at higher flows. • An additional trickling filter influent pump was installed for redundancy purposes, and the trickling filter rotary distributors were upgraded to increase capacity. • A new submersible chemical induction system was installed to improve initial mixing of the hypochlorite with secondary effluent. • Construction of a new Effluent Diversion Structure (EDS) which manages WWTP effluent between the new outfall (002) and the City's original outfall (001) during extreme,high-flow events. • The industrial outfall formerly used by the now defunct Rayonier Mill was procured and refurbished to serve at the City's primary outfall (002). • Improvements to the WWTP's supervisory control and data acquisition (SCADA) system were also made as part of the project. The Port Angeles Publicly Owned Treatment Works (POTW) is an Environmental Protection Agency (EPA) major facility with a maximum month design flow of 10.8 million gallons per day(MGD). Collection System Status The City's sewage collection system consists of both separate sanitary system (67 percent) and combined sanitary and stormwater system (33 percent). The City's original collection system was designed as a combined sewer system with storm water routed along with sanitary sewage. The collection system has approximately 119 miles of 6- to 30-inch diameter pipeline. There are also 66 miles of storm drains. The system serves approximately 11,642 acres. It has 17 pump stations. The WWTP receives most of the 1/7/16 Page 5 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 wastewater(about 90 percent) from pump station number 4 which has a peak capacity of 13.4 mgd. This pump station will be upgraded to 28 mgd in 2016 as part of the CSO reduction plan. Wastewater also comes through a gravity line serving the area north of the WWTP. A new 12-inch gravity interceptor serving eastern Urban Growth Area (UGA)was connected 2008. Most of the sewer lines were constructed between 1900 and 1960. The oldest part of town, the area known as the "Old Downtown," was built with street and building storm water drainage purposely routed to the combined system, which was constructed around 1915. The City's storm sewer system was not built until the 1960s. The sewer lines were constructed of terra cotta or concrete. The system has mostly small diameter 8-inch gravity sewers, and sometimes as small as 6-inch because of steep slope in the general north-south alignment. Wastewater is subsequently pumped eastward along the waterfront to the WWTP. The City has two UGAs (western and eastern) that are part of the WWTP collection system. It annexed a portion of the western UGA in 2005 and has provided service to some areas but the eastern UGA remains outside the city limit. The 2006 general sewer plan identified the collection system bottlenecks that need to be upgraded to accommodate build out flows in 2026. The collection system is subject to significant infiltration and inflow (I/I) during storm events. Treatment plant inflows are directly correlated with rainfall. The combined collection system does not have adequate conveyance capacity during rainfall events that result in bypass of the treatment plant and discharge of raw sewage into the Port Angeles Harbor. At present, there are four CSO outfalls in the collection system. After completion of the CSO Plan, the collection system will have a total peak design flow capacity of 50 mgd,which will result in control of CSOs into Port Angeles Harbor. Treatment Processes You can find basic information describing wastewater treatment processes included in a booklet at the Water Environment Federation website at: htlp://www.wef.org//publicinfonnation/default.aspx Port Angeles WWTP is a secondary treatment facility that utilizes Trickling Filter/Solids Contact (TF/SC) process. The TF/SC process combines trickling filters with short detention solids contact to promote flocculation and subsequent settling. The plant is designed for a maximum month flow of 10.8 mgd. Peak daily flow is limited to 13.4 mgd. Flow is either pumped to the plant from Pumping Station 4 or enters the force main approaching the plant from a gravity-pressure line from an elevated plateau where the Francis Street diversion manholes are located. Flow is pre-chlorinated to reduce odors. The headworks consist of screening, flow measurement and splitting, and screenings and grit removal. All flows pass through an automatic mechanical screen. Influent flow is measured by Parshall flumes. Plant flow is normally routed through the newer rectangular primary clarifier. High flows are routed to both the rectangular and older circular clarifiers. The older primary clarifier is 70 feet in diameter and has a 10 feet side water depth. The newer rectangular clarifier is 104 feet by 21.5 feet with a 10 feet side water depth. Primary sludge is pumped to cyclonic de-gritters where grit are recovered, 1/7/16 Page 6 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 and then to gravity thickener. The grit is dewatered and combined with screenings and the combined solid material is disposed in a landfill. Secondary treatment is provided by the TF/SC process which combines positive features of an attached growth system (energy efficiency and resistance to shock loading) with positive features of a suspended growth system (ability to flocculate dispersed solids and polish effluent to low dissolved organic levels). The trickling filter contains a biofilm reactor that primarily removes soluble Biochemical Oxygen Demand (BOD) from primary effluent. The trickling filter effluent and sloughed off solids flow to the solids contact tank. The solids contact tank with a low hydraulic residence time provides conditions in which sloughed off solids can flocculate and produce a rapidly settling mixed liquor. Residual soluble BOD is also removed in the solids contact tank. Primary effluent joins with filtrate recycle and trickling filter circulation recycle and flows to the trickling filter circulation pumping station. Primary effluent is pumped to the top of the two 55 feet diameter trickling filters. Trickling filter effluent passes a channel hopper where any accumulated snails can be pumped to a de-gritting cyclone. The solids contact part of the TF/SC process consist of two 150,000 gallons rectangular tanks (I 10 feet x 12 feet x 16 feet) that can be operated in three different modes. In solids re-aeration mode, a large proportion of solids inventory is retained in one tank resulting in lower Mixed Liquor Suspended Solids (MLSS) in solids contact tank and therefore a lower loading to the clarifier. Three blowers supply air to the solids contact tanks. Mixed liquor from the solids contact tank is split between two 68 feet secondary clarifiers (16 feet side water depth). Solids settle to the bottom of the clarifiers where a sludge collector device sweeps clarifier bottom and return secondary sludge pumps withdraw the sludge. Sludge is recycled to the solids re-aeration tank with a portion wasted to the gravity thickener. Secondary effluent is chlorinated with liquid sodium hypochlorite in two chlorine contact tanks with a total volume of 263,000 gallons. The effluent is then dechlorinated with sodium bisulfite immediately upstream of the outlet weir of the chlorine contact tanks. The plant is provided with a standby generator and dual sources of electrical power. In the event of an emergency power failure, wastewater will receive primary treatment and disinfection. Degritted primary sludge and waste activated sludge are conveyed to a covered gravity thickener (32 feet in diameter and 12 feet deep). Thickened sludge and scum (collected separately) are pumped into two anaerobic digesters of 40 feet diameter and 23 feet deep each. One digester is equipped with a fixed cover while the other is equipped with a floating cover. Volatile solids are destroyed anaerobically at a high temperature environment. Sludge flows by gravity from the digesters to a 70,000 gallons storage tank where it is well mixed before dewatering. Sludge from the storage tank is pumped to a single 2.2 in belt filter press that produces 18 to 20 percent solids. Dewatered sludge is sent to 1/7/16 Page 7 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 municipal landfill for composting. Filtrate is stored in an 114,000 gallon tank and is eventually recycled with primary effluent for secondary treatment. The City has a partially delegated pretreatment program where it regulates the Minor Industrial Users (MIUs) and Ecology regulates the Significant Industrial Users (SIUs). At present, there are 13 MIUs and I SIU. The MIUs include small industries such as laundries,printers,breweries, film developers, and seafood. The WWTP is classified as a level III facility that requires an operator certification level "Group III" to be in responsible charge of the day-to-day operation. The wastewater division has 12 staff, three of which handle the collection system while the other nine operate and maintain the treatment plant. The plant is staffed from 7:00 am to 3:30 pm Monday through Friday. On weekends, one operator works three hours each day from 7:00 am to 10:00 am. Solid Wastes/Residual Solids The treatment facilities remove solids during the treatment of the wastewater at the headworks (grit and screenings), and at the primary and secondary clarifiers, in addition to incidental solids (rags, scum, and other debris) removed as part of the routine maintenance of the equipment. Port Angeles drains grit, rags, scum, and screenings and disposes this solid waste at the local landfill. Solids removed from the primary and secondary clarifiers are treated. This facility has met the solid waste requirements for screening, as required by WAC 173-308-205. Discharge Outfalls The treated and disinfected effluent flows into Port Angeles Harbor and the Strait of Juan de Fuca through two outfalls. The old City Outfall 001 is a 27-inch concrete pipe that is 3,550 feet long. Outfall 001 will now only be used during high tides and flows when the recently acquired ex-industrial outfall(002) cannot handle all the flow. This new primary outfall is a 48-inch diameter pipe that is 7,990 feet long. It discharges to the Strait, and has a 940 foot diffuser with 48, 6-inch ports spaced on 20-foot centers. The depth is 52 feet MLLW and the capacity is 40 mgd. Due to the location and higher currents of the Strait,the ex-industrial outfall provides better dilution than old City outfall 001. B. Description of the Receiving Water Port Angeles discharges primarily to the Strait of Juan de Fuca through Outfall 002. Some flows may still be discharged to Port Angeles Harbor through Outfall 001. There are no other nearby point source outfalls. Significant nearby non-point sources of pollutants include stormwater runoff. Section IIIE of this fact sheet describes any receiving waterbody impairments. The ambient background data used for this permit includes the following from Ecology marine water monitoring site PAH008 —Port Angeles Harbor—Morse Creek: 1/7/16 Page 8 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Table 2 Ambient Background Data Parameter Value Used Temperature (highest annual 1-DADMax) 11.9° C pH(Maximum/Minimum) 7.9/7.77 Standard Units Dissolved Oxygen 7.3 mg/L Total Ammonia-N 0.014 mg/L Fecal Coliform 1/100 mL dry weather (8/100 mL storm related) Salinity 31.3 mg/L C. Wastewater Influent Characterization Port Angeles reported the concentration of influent pollutants in discharge monitoring reports. The influent wastewater is characterized as follows: Parameter Units Average Value Maximum Value Biochemical Oxygen Demand mg/L 182 492 (BOD5) BOD5 lbs/day 3,287 9,272 Carbonaceous Biochemical mg/L 115 368 Oxygen Demand (CBOD5) CBOD5 lbs/day 2,047 6,111 Total Suspended Solids (TSS) mg/L 346 10,226 TSS lbs/day 4,883 52,521 Flow mgd 2.5 8.7 Ammonia(Total) mg/L 22.7 45.8 pH Standard units 6.1 (Min.) 7.7 D. Wastewater Effluent Characterization Port Angeles reported the concentration of pollutants in the discharge in the permit application and in discharge monitoring reports. The tabulated data represents the quality of the wastewater effluent discharged from August 1, 2009, to July 31, 2014. The wastewater effluent is characterized as follows: Parameter Units Average Value Maximum Value CBOD5 mg/L 4.83 12.0 CBOD5 lbs/day 101 661 1/7/16 Page 9 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Parameter Units Average Value Maximum Value TSS mg/L 9.1 35 TSS lbs/day 194 1,997 Ammonia(Total) mg/L 13.3 33.0 Chlorine (Total Residual) mg/L 0.09 0.57 Temperature °C 13.9 19.9 Maximum Monthly Maximum Parameter Units Weekly Geometric Geometric Mean Mean Fecal Coliform 9/100 ml 76 995 Parameter Units Minimum Value Maximum Value pH Standard Units 6.1 8.0 E. Summary of Compliance with Previous Permit Issued The previous permit placed effluent limits on CBOD5, TSS, Fecal Coliform Bacteria, pH, Total Residual Chlorine, and Acute Whole Effluent Toxicity(WET). Port Angeles has complied with the effluent limits and permit conditions throughout the duration of the permit issued on July 15, 2008. Ecology assessed compliance based on its review of the facility's information in the Ecology Permitting and Reporting Information System (PARIS), Discharge Monitoring Reports (DMRs) and on inspections. The following table summarizes the violations that occurred during the permit term. Table 3 Violations Monitoring Statistical Date Point Parameter Base Units Value Limit Weekly 11/1/2009 001 Fecal Coliform Geometric 9/100 mL 537 400 Mean Weekly 11/1/2011 001 Fecal Coliform Geometric 9/100 mL 995 400 Mean 01/01/2012 001 CBOD5 Average Percent 81 85 Removal 2/1/2014 001 TSS Removal Average Percent 81 85 7/1/2010 Influent TSS Loading Average lbs/day 12,382 11,750 1/7/16 Page 10 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Port Angeles has been in compliance with report submittal requirements over the permit term. F. State Environmental Policy Act(SEPA) Compliance State law exempts the issuance, reissuance or modification of any wastewater discharge permit from the SEPA process as long as the permit contains conditions that are no less stringent than federal and state rules and regulations (RCW 43.21C.0383). The exemption applies only to existing discharges,not to new discharges. III. PROPOSED PERMIT LIMITS Federal and state regulations require that effluent limits in an NPDES permit must be either technology- or water quality-based. • Technology-based limits are based upon the treatment methods available to treat specific pollutants. Technology-based limits are set by the EPA and published as a regulation, or Ecology develops the limit on a case-by-case basis [40 Code of Federal Regulations (CFR) 125.3, and chapter 173-220 WAC]. • Water quality-based limits are calculated so that the effluent will comply with the Surface Water Quality Standards (chapter 173-201A WAC), Ground Water Standards (chapter 173-200 WAC), Sediment Quality Standards (chapter 173-204 WAC), or the National Toxics Rule (40 CFR 131.36). • Ecology must apply the most stringent of these limits to each parameter of concern. These limits are described below. The limits in this permit reflect information received in the application and from supporting reports (engineering, hydrogeology, etc.). Ecology evaluated the permit application and determined the limits needed to comply with the rules adopted by the state of Washington. Ecology does not develop effluent limits for all reported pollutants. Some pollutants are not treatable at the concentrations reported, are not controllable at the source, are not listed in regulation, and do not have a reasonable potential to cause a water quality violation. Ecology does not usually develop limits for pollutants not reported in the permit application but may be present in the discharge. The permit does not authorize discharge of the non-reported pollutants. During the five-year permit term, the facility's effluent discharge conditions may change from those conditions reported in the permit application. The facility must notify Ecology if significant changes occur in any constituent [40 CFR 122.42(a)]. Until Ecology modifies the permit to reflect additional discharge of pollutants, a permitted facility could be violating its permit. A. Design Criteria Under WAC 173-220-150 (1)(g), flows and waste loadings must not exceed approved design criteria. Ecology approved design criteria for this facility's treatment plant in the plans and specifications from 1991 and prepared by Brown and Caldwell. The table below includes design criteria from the referenced report. Table 4 Design Criteria for the Port Angeles WWTP 1/7/16 Page 11 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Parameter Design Quantity Maximum Month Design Flow(MMDF) 10.8 MGD Maximum Daily Flow 13.4 MGD BOD5 Loading for Maximum Month 8,100 lbs/day TSS Loading for Maximum Month 11,750 lbs/day B. Technology-Based Effluent Limits Federal and state regulations define technology-based effluent limits for domestic wastewater treatment plants. These effluent limits are given in 40 CFR Part 133 (federal) and in chapter 173- 221 WAC (state). These regulations are performance standards that constitute all known, available, and reasonable methods of prevention, control, and treatment (AKART) for domestic wastewater. Both the federal and state regulations allow alternate limits for waste stabilization ponds (lagoons), trickling filters, and facilities with less concentrated influent wastewater. Ecology may approve a request for alternative limits only if a facility meets all of the following conditions. • The discharge must not cause water quality violations. • The facility must identify effluent concentrations consistently achievable through proper operation and maintenance. • The facility must demonstrate that industrial wastewater does not interfere with the domestic wastewater facility. • The wastewater facility must be within Ecology approved hydraulic and organic design loading capacity. • The facility must evaluate whether seasonal alternative limits are more appropriate than year-round. • The facility must meet all other permit requirements and conditions. The federal CSO Control Policy (59 FR 18688) also requires entities with Combined Sewer Overflows to implement "Nine Minimum Controls" as technology-based performance standards for CSO discharges. Nine Minimum Controls are discussed in more detail in Section V of this fact sheet. The table below identifies technology-based limits for pH, fecal coliform, BOD5, and TSS, as listed in chapter 173-221 WAC. Section IILF of this fact sheet describes the potential for water quality-based limits. Table 5 Technology-based Limits 1/7/16 Page 12 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Parameter Average Monthly Limit Average Weekly Limit CBOD5 25 mg/L 40 mg/L (concentration) In addition, the CBOD5 effluent concentration must not CBOD5 exceed 15 percent of the average influent concentration, (concentration) except when the monthly average influent falls below 90 mg/L. TSS (concentration) 30 mg/L 45 mg/L TSS In addition, the TSS effluent concentration must not exceed 15 percent of the average influent concentration, except (concentration) when the monthly average influent falls below 90 mg/L. Chlorine 0.5 mg/L 0.75 mg/L Parameter Monthly Geometric Mean Weekly Geometric Mean Limit Limit Fecal Coliform Bacteria 200 organisms/100 mL 400 organisms/100 mL Parameter Daily Minimum Daily Maximum pH 6.0 Standard Units 9.0 Standard Units Ecology derived the technology-based monthly average limit for chlorine from standard operating practices. The Water Pollution Control Federation's Chlorination of Wastewater (1976) states that a properly designed and maintained wastewater treatment plant can achieve adequate disinfection if a 0.5 mg/L chlorine residual is maintained after fifteen minutes of contact time. See also Metcalf and Eddy, Wastewater Engineering, Treatment, Disposal and Reuse, Third Edition, 1991. A treatment plant that provides adequate chlorination contact time can meet the 0.5 mg/L chlorine limit on a monthly average basis. According to WAC 173-221-030(11)(b), the corresponding weekly average is 0.75 mg/L. Technology-based mass limits are based on WAC 173-220-130(3)(b) and 173-221-030(11)(b). Ecology calculated the monthly and weekly average mass limits for CBOD5 and Total Suspended Solids as follows: Mass Limit = CL x DF x CF where: CL = Technology-based concentration limits listed in the above table DF = Maximum Monthly Average Design flow (MGD) CF = Conversion factor of 8.34 For this facility, the existing permitted values for CBOD5 and TSS were used for the mass limits, as they are lower than the above calculation. The Permittee requested that the required 85 1/7/16 Page 13 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 percent removal of CBOD5 and TSS be reduced when the influent concentrations are below 90 mg/L. A minimum of 75 percent removal is required during that situation. Table 6 Technology-based Mass Limits Parameter Concentration Mass Limit(mg/L) Limit(lbs/day) CBOD5 Monthly Average 25 905 CBOD5 Weekly Average 40 1,358 TSS Monthly Average 30 11676 TSS Weekly Average 45 2,515 C. Surface Water Quality-Based Effluent Limits The Washington State surface water quality standards (chapter 173-201A WAC) are designed to protect existing water quality and preserve the beneficial uses of Washington's surface waters. Waste discharge permits must include conditions that ensure the discharge will meet the surface water quality standards (WAC 173-201A-510). Water quality-based effluent limits may be based on an individual waste load allocation or on a waste load allocation developed during a basin wide Total Maximum Daily Load(TMDL) Study. Numerical Criteria for the Protection of Aquatic Life and Recreation Numerical water quality criteria are listed in the water quality standards for surface waters (chapter 173-201A WAC). They specify the maximum levels of pollutants allowed in receiving water to protect aquatic life and recreation in and on the water. Ecology uses numerical criteria along with chemical and physical data for the wastewater and receiving water to derive the effluent limits in the discharge permit. When surface water quality-based limits are more stringent or potentially more stringent than technology-based limits, the discharge must meet the water quality-based limits. Numerical Criteria for the Protection of Human Health The U.S. EPA has published 91 numeric water quality criteria for the protection of human health that are applicable to dischargers in Washington State (EPA, 1992). These criteria are designed to protect humans from exposure to pollutants linked to cancer and other diseases, based on consuming fish and shellfish and drinking contaminated surface waters. The water quality standards also include radionuclide criteria to protect humans from the effects of radioactive substances. Narrative Criteria Narrative water quality criteria (e.g., WAC 173-201A-240(1); 2006) limit the toxic, radioactive, or other deleterious material concentrations that the facility may discharge to levels below those which have the potential to: • Adversely affect designated water uses 1/7/16 Page 14 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 • Cause acute or chronic toxicity to biota • Impair aesthetic values • Adversely affect human health Narrative criteria protect the specific designated uses of all fresh waters (WAC 173- 201A-200, 2006) and of all marine waters (WAC 173-201A-210, 2006) in the state of Washington. Antidegradation Description--The purpose of Washington's Antidegradation Policy (WAC 173-201A- 300-330; 2006)is to: • Restore and maintain the highest possible quality of the surface waters of Washington. • Describe situations under which water quality may be lowered from its current condition. • Apply to human activities that are likely to have an impact on the water quality of surface water. • Ensure that all human activities likely to contribute to a lowering of water quality, at a minimum, apply all known, available, and reasonable methods of prevention, control, and treatment(AKART). • Apply three tiers of protection (described below) for surface waters of the state. Tier I ensures existing and designated uses are maintained and protected and applies to all waters and all sources of pollutions. Tier II ensures that waters of a higher quality than the criteria assigned are not degraded unless such lowering of water quality is necessary and in the overriding public interest. Tier II applies only to a specific list of polluting activities. Tier III prevents the degradation of waters formally listed as "outstanding resource waters," and applies to all sources of pollution. A facility must prepare a Tier II analysis when all three of the following conditions are met: • The facility is planning a new or expanded action. • Ecology regulates or authorizes the action. • The action has the potential to cause measurable degradation to existing water quality at the edge of a chronic mixing zone. Facility Specific Requirements--This facility must meet Tier I requirements. 1/7/16 Page 15 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 • Dischargers must maintain and protect existing and designated uses. Ecology must not allow any degradation that will interfere with, or become injurious to, existing or designated uses, except as provided for in chapter 173-201A WAC. Ecology's analysis described in this section of the fact sheet demonstrates that the proposed permit conditions will protect existing and designated uses of the receiving water. Combined Sewer Overflows Chapter 173-245 WAC requires that "All CSO sites shall achieve and at least maintain the greatest reasonable reduction, and neither cause violations of applicable water quality standards, nor restrictions to the characteristic uses of the receiving water, nor accumulation of deposits which: (a) Exceed sediment criteria or standards; or(b)have an adverse biological effect." "The greatest reasonable reduction" means control of each CSO outfall such that an average of no more than one untreated discharge may occur per year. Ecology includes specific conditions in the proposed permit to ensure that Port Angeles continues to make progress towards meeting water quality goals for each CSO outfall in its system. Section V of this fact sheet contains more detailed information on these CSO requirements. Mixing Zones A mixing zone is the defined area in the receiving water surrounding the discharge port(s), where wastewater mixes with receiving water. Within mixing zones the pollutant concentrations may exceed water quality numeric standards, so long as the discharge doesn't interfere with designated uses of the receiving water body (for example, recreation, water supply, and aquatic life and wildlife habitat, etc.) The pollutant concentrations outside of the mixing zones must meet water quality numeric standards. State and federal rules allow mixing zones because the concentrations and effects of most pollutants diminish rapidly after discharge, due to dilution. Ecology defines mixing zone sizes to limit the amount of time any exposure to the end-of-pipe discharge could harm water quality,plants, or fish. The state's water quality standards allow Ecology to authorize mixing zones for the facility's permitted wastewater discharges only if those discharges already receive AKART. Mixing zones typically require compliance with water quality criteria within a specified distance from the point of discharge and must not use more than 25 percent of the available width of the water body for dilution [WAC 173-201A-400 (7)(a)(ii-iii)]. Ecology uses modeling to estimate the amount of mixing within the mixing zone. Through modeling Ecology determines the potential for violating the water quality standards at the edge of the mixing zone and derives any necessary effluent limits. Steady-state models are the most frequently used tools for conducting mixing zone analyses. Ecology chooses values for each effluent and for receiving water variables that correspond to the time period when the most critical condition is likely to occur (see Ecology's Permit Writer's Manuao. Each critical condition parameter, by itself, has a low probability of occurrence and the resulting dilution factor is conservative. The term "reasonable worst-case" applies to these values. 1/7/16 Page 16 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 The mixing zone analysis produces a numerical value called a dilution factor (DF). A dilution factor represents the amount of mixing of effluent and receiving water that occurs at the boundary of the mixing zone. For example, a dilution factor of 4 means the effluent is 25 percent and the receiving water is 75 percent of the total volume of water at the boundary of the mixing zone. Ecology uses dilution factors with the water quality criteria to calculate reasonable potentials and effluent limits. Water quality standards include both aquatic life-based criteria and human health-based criteria. The former are applied at both the acute and chronic mixing zone boundaries; the latter are applied only at the chronic boundary. The concentration of pollutants at the boundaries of any of these mixing zones may not exceed the numerical criteria for that zone. Each aquatic life acute criterion is based on the assumption that organisms are not exposed to that concentration for more than one hour and more often than one exposure in three years. Each aquatic life chronic criterion is based on the assumption that organisms are not exposed to that concentration for more than four consecutive days and more often than once in three years. The two types of human health-based water quality criteria distinguish between those pollutants linked to non-cancer effects (non-carcinogenic) and those linked to cancer effects (carcinogenic). The human health-based water quality criteria incorporate several exposure and risk assumptions. These assumptions include: • A 70-year lifetime of daily exposures. • An ingestion rate for fish or shellfish measured in kg/day. • An ingestion rate of two liters/day for drinking water. • A one-in-one-million cancer risk for carcinogenic chemicals. This permit authorizes a small acute mixing zone, surrounded by a chronic mixing zone around the point of discharge (WAC 173-201A-400). The water quality standards impose certain conditions before allowing the discharger a mixing zone: 1. Ecology must specify both the allowed size and location in a permit. The proposed permit specifies the size and location of the allowed mixing zone (as specified below). 2. The facility must fully apply "all known, available, and reasonable methods of prevention, control and treatment" (AKART) to its discharge. Ecology has determined that the treatment provided at Port Angeles meets the requirements of AKART(see "Technology-based Limits"). 3. Ecology must consider critical discharge conditions. Surface water quality-based limits are derived for the water body's critical condition (the receiving water and waste discharge condition with the highest potential for adverse impact on the aquatic biota, human health, and existing or 1/7/16 Page 17 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 designated waterbody uses). The critical discharge condition is often pollutant- specific or waterbody-specific. Critical discharge conditions are those conditions that result in reduced dilution or increased effect of the pollutant. Factors affecting dilution include the depth of water, the density stratification in the water column, the currents, and the rate of discharge. Density stratification is determined by the salinity and temperature of the receiving water. Temperatures are warmer in the surface waters in summer. Therefore, density stratification is generally greatest during the summer months. Density stratification affects how far up in the water column a freshwater plume may rise. The rate of mixing is greatest when an effluent is rising. The effluent stops rising when the mixed effluent is the same density as the surrounding water. After the effluent stops rising, the rate of mixing is much more gradual. Water depth can affect dilution when a plume might rise to the surface when there is little or no stratification. Ecology uses the water depth at mean lower low water (MLLW) for marine waters. Ecology's Permit Writer's Manual describes additional guidance on criteria/design conditions for determining dilution factors. The manual can be obtained from Ecology's website at: htips://fortress.wa. ovg/ecy/publications/SummauPages./92109.html. Table 7 Critical Conditions Used to Model the Discharge Critical Condition Value for Value for O u tf a 11001 O u tf a 11002 Water depth at MLLW 60 feet 52 feet Density 25 24 10"'percentile current speeds for acute mixing 0.056 m/sec 0.022 m/sec zone 50th percentile current speeds for chronic and human health mixing zones 0.155 m/sec 0.14 m/sec Maximum average monthly effluent flow for 5.3 million chronic and human health non-carcinogen gallons per 8.44 MGD day (MGD) Maximum daily flow for acute mixing zone 13.4 MGD 26.7 MGD 1 DAD MAX effluent temperature 12 degrees C 10 °C Ecology obtained ambient data at critical conditions in the vicinity of the outfall from "Outfall Location Studies, Port Angeles, Washington" study conducted in 1971 by Rayonier, and Ecology obtained ambient data from ambient stations PAH003,PAH006,PAH007, and PAH008 located in the area. 4. Supporting information must clearly indicate the mixing zone would not: • Have a reasonable potential to cause the loss of sensitive or important habitat. 1/7/16 Page 18 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 • Substantially interfere with the existing or characteristic uses. • Result in damage to the ecosystem. • Adversely affect public health. Ecology established Washington State water quality criteria for toxic chemicals using EPA criteria. EPA developed the criteria using toxicity tests with numerous organisms and set the criteria to generally protect the species tested and to fully protect all commercially and recreationally important species. EPA sets acute criteria for toxic chemicals assuming organisms are exposed to the pollutant at the criteria concentration for one hour. They set chronic standards assuming organisms are exposed to the pollutant at the criteria concentration for four days. Dilution modeling under critical conditions generally shows that both acute and chronic criteria concentrations are reached within minutes of discharge. The discharge plume does not impact drifting and non-strong swimming organisms because they cannot stay in the plume close to the outfall long enough to be affected. Strong swimming fish could maintain a position within the plume, but they can also avoid the discharge by swimming away. Mixing zones generally do not affect benthic organisms (bottom dwellers) because the buoyant plume rises in the water column. Ecology has additionally determined that the effluent will not exceed 33 degrees C for more than two seconds after discharge; and that the temperature of the water will not create lethal conditions or blockages to fish migration. Ecology evaluates the cumulative toxicity of an effluent by testing the discharge with WET testing. Ecology reviewed the above information, the specific information on the characteristics of the discharge, the receiving water characteristics, and the discharge location. Based on this review, Ecology concluded that the discharge does not have a reasonable potential to cause the loss of sensitive or important habitat, substantially interfere with existing or characteristics uses, result in damage to the ecosystem, or adversely affect public health if the permit limits are met. 5. The discharge/receiving water mixture must not exceed water quality criteria outside the boundary of a mixing zone. Ecology conducted a reasonable potential analysis; using procedures established by the EPA and by Ecology, for each pollutant and concluded the discharge/receiving water mixture will not violate water quality criteria outside the boundary of the mixing zone if permit limits are met. 1/7/16 Page 19 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 6. The size of the mixing zone and the concentrations of the pollutants must be minimized. At any given time, the effluent plume uses only a portion of the acute and chronic mixing zone, which minimizes the volume of water involved in mixing. Because tidal currents change direction, the plume orientation within the mixing zone changes. The plume mixes as it rises through the water column therefore much of the receiving water volume at lower depths in the mixing zone is not mixed with discharge. Similarly, because the discharge may stop rising at some depth due to density stratification, waters above that depth will not mix with the discharge. Ecology determined it is impractical to specify in the permit the actual,much more limited volume in which the dilution occurs as the plume rises and moves with the current. Ecology minimizes the size of mixing zones by requiring dischargers to install diffusers when they are appropriate to the discharge and the specific receiving waterbody. When a diffuser is installed, the discharge is more completely mixed with the receiving water in a shorter time. Ecology also minimizes the size of the mixing zone (in the form of the dilution factor) using design criteria with a low probability of occurrence. For example, Ecology uses the expected 95th percentile pollutant concentration, the 90th percentile background concentration, the centerline dilution factor, and the lowest flow occurring once in every ten years to perform the reasonable potential analysis. Because of the above reasons, Ecology has effectively minimized the size of the mixing zone authorized in the proposed permit. 7. Maximum Size of Mixing Zone The authorized mixing zone does not exceed the maximum size restriction. 8. Acute Mixing Zone • The discharge/receiving water mixture must comply with acute criteria as near to the point of discharge as practicably attainable. Ecology determined the acute criteria will be met at 10 percent of the distance of the chronic mixing zone. • The pollutant concentration, duration, and frequency of exposure to the discharge will not create a barrier to migration or translocation of indigenous organisms to a degree that has the potential to cause damage to the ecosystem. As described above, the toxicity of any pollutant depends upon the exposure, the pollutant concentration, and the time the organism is exposed to that concentration. Authorizing a limited acute mixing zone for this discharge assures that it will not create a barrier to migration. The effluent from this discharge will rise as it enters the receiving water, 1/7/16 Page 20 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 assuring that the rising effluent will not cause translocation of indigenous organisms near the point of discharge (below the rising effluent). • Comply with size restrictions. The mixing zone authorized for this discharge complies with the size restrictions published in chapter 173-201A WAC. 9. Overlap of Mixing Zones The mixing zones do not overlap another mixing zone. D. Designated Uses and Surface Water Quality Criteria Applicable designated uses and surface water quality criteria are defined in chapter 173-201A WAC. In addition, the U.S. EPA set human health criteria for toxic pollutants (EPA 1992). The tables included below summarize the criteria applicable to the receiving water's designated uses. • Aquatic life uses are designated using the following general categories. All indigenous fish and non-fish aquatic species must be protected in waters of the state. 1. Extraordinary quality salmonid and other fish migration, rearing, and spawning; clam, oyster, and mussel rearing and spawning; crustaceans and other shellfish (crabs, shrimp, crayfish, scallops, etc.)rearing and spawning. 2. Excellent quality salmonid and other fish migration,rearing, and spawning; clam, oyster, and mussel rearing and spawning; crustaceans and other shellfish (crabs, shrimp, crayfish, scallops, etc.)rearing and spawning. 3. Good quality salmonid migration and rearing; other fish migration, rearing, and spawning; clam, oyster, and mussel rearing and spawning; crustaceans and other shellfish(crabs, shrimp, crayfish, scallops, etc.)rearing and spawning. 4. Fair quality salmonid and other fish migration. The Aquatic Life Uses and the associated criteria for this receiving water are identified below. Table 8 Marine Aquatic Life Uses and Associated Criteria Excellent Quality Temperature Criteria—Highest 1D 16°C(60.8°F) MAX Dissolved Oxygen Criteria—Lowest 6.0 mg/L 1-Day Minimum • 5 NTU over background when the Turbidity Criteria background is 50 NTU or less; or • A 10 percent increase in turbidity when 1/7/16 Page 21 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Excellent Quality the background turbidity is more than 50 NTU. pH must be within the range of 7.0 to 8.5 pH Criteria with a human-caused variation within the above range of less than 0.5 units. • To protect shellfish harvesting, fecal coliform organism levels must not exceed a geometric mean value of 14 colonies/100 mL, and not have more than 10 percent of all samples (or any single sample when less than ten sample points exist) obtained for calculating the geometric mean value exceeding 43 colonies/100 mL. • The recreational uses are primary contact recreation and secondary contact recreation. The recreational uses for this receiving water are identified below. Table 9 Recreational Uses Recreational Use Criteria Fecal coliform organism levels must not exceed a geometric mean value of 14 colonies/100 mL,with Primary Contact Recreation not more than 10 percent of all samples (or any single sample when less than ten sample points exist) obtained for calculating the geometric mean value exceeding 43 colonies/100 mL. • The miscellaneous marine water uses are wildlife habitat, harvesting, commerce and navigation,boating, and aesthetics. E. Water Quality Impairments Port Angeles Harbor is listed on the current 303(d) and is impaired for Fecal Coliform Bacteria. F. Evaluation of Surface Water Quality-Based Effluent Limits for Narrative Criteria Ecology must consider the narrative criteria described in WAC 173-201A-160 when it determines permit limits and conditions. Narrative water quality criteria limit the toxic, radioactive, or other deleterious material concentrations that the facility may discharge which have the potential to adversely affect designated uses, cause acute or chronic toxicity to biota, impair aesthetic values, or adversely affect human health. Ecology considers narrative criteria when it evaluates the characteristics of the wastewater and when it implements all known, available, and reasonable methods of treatment and prevention (AKART) as described above in the technology-based limits section. When Ecology determines if a facility is meeting AKART it considers the pollutants in the wastewater and the adequacy of the treatment to prevent the violation of narrative criteria. 1/7/16 Page 22 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 In addition, Ecology considers the toxicity of the wastewater discharge by requiring whole effluent toxicity (WET) testing when there is a reasonable potential for the discharge to contain toxics. Ecology's analysis of the need for WET testing for this discharge is described later in the fact sheet. G. Evaluation of Surface Water Quality-Based Effluent Limits for Numeric Criteria Pollutants in an effluent may affect the aquatic environment near the point of discharge (near-field) or at a considerable distance from the point of discharge (far-field). Toxic pollutants, for example, are near-field pollutants; their adverse effects diminish rapidly with mixing in the receiving water. Conversely, a pollutant such as BOD5 is a far-field pollutant whose adverse effect occurs away from the discharge even after dilution has occurred. Thus, the method of calculating surface water quality-based effluent limits varies with the point at which the pollutant has its maximum effect. With technology-based controls (AKART), predicted pollutant concentrations in the discharge exceed water quality criteria. Ecology therefore authorizes a mixing zone in accordance with the geometric configuration, flow restriction, and other restrictions imposed on mixing zones by chapter 173-201A WAC. The diffuser at Outfall 001 is 250 feet long with a diameter of 42 inches. The diffuser has a total of 13, 6-inch diameter ports. The distance between ports is 20 feet. The mean lower low water (MLLW) depth is 60 feet. The diffuser at Outfall 002 is 940 feet long with a diameter of 42 inches. The diffuser has a total of 48, 6-inch diameter ports. The distance between ports is 20 feet. The mean lower low water(MLLW) depth is 52 feet. Outfall 001: Chronic Mixing Zone--WAC 173-201A-400(7)(b) specifies that mixing zones must not extend in any horizontal direction from the discharge ports for a distance greater than 200 feet plus the depth of water over the discharge ports and may not occupy more than 25 percent of the width of the water body as measured during MLLW. The horizontal distance of the chronic mixing zone is 260 feet. The mixing zone extends from the bottom to the top of the water column. Acute Mixing Zone--WAC 173-201A-400(8)(b) specifies that in estuarine waters a zone where acute criteria may be exceeded must not extend beyond 10 percent of the distance established for the chronic zone. The acute mixing zone for Outfall 001 extends 26 feet in any direction from any discharge port. Outfall 002: Chronic Mixing Zone--WAC 173-201A-400(7)(c) specifies that mixing zones must not extend in any horizontal direction from the discharge ports for a distance greater than 300 feet plus the depth of water over the discharge ports as measured during MLLW. The horizontal distance of the chronic mixing zone is 352 feet. The mixing zone extends from the bottom to the top of the water column. 1/7/16 Page 23 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Acute Mixing Zone--WAC 173-201A-400(8)(b) specifies that in oceanic waters a zone where acute criteria may be exceeded must not extend beyond 10 percent of the distance established for the chronic zone. The horizontal distance of the acute mixing zone is 35.2 feet. The mixing zone extends from the bottom to the top of the water column. Ecology determined the dilution factors that occur within these zones at the critical condition using models. The dilution factors are listed below. Table 10 Dilution Factors (DF) for Outfall 001 Criteria Acute Chronic Aquatic Life 37 510 Human Health, Carcinogen 510 Human Health,Non-carcinogen 510 Table 11 Dilution Factors (DF) for Outfall 002 Criteria Acute Chronic Aquatic Life 68 593 Human Health, Carcinogen 593 Human Health,Non-carcinogen 593 Ecology determined the impacts of dissolved oxygen deficiency, nutrients, pH, fecal coliform, chlorine, ammonia, metals, other toxics, and temperature as described below, using the dilution factors in the above table. The derivation of surface water quality-based limits also takes into account the variability of pollutant concentrations in both the effluent and the receiving water. Dissolved Oxygen--BOD5 and Ammonia Effects--Natural decomposition of organic material in wastewater effluent impacts dissolved oxygen in the receiving water at distances far outside of the regulated mixing zone. The BOD5 of an effluent sample indicates the amount of biodegradable material in the wastewater and estimates the magnitude of oxygen consumption the wastewater will generate in the receiving water. The amount of ammonia-based nitrogen in the wastewater also provides an indication of oxygen demand potential in the receiving water. With technology-based limits, this discharge results in a small amount of biochemical oxygen demand (BOD5) relative to the large amount of dilution in the receiving water at critical conditions. Technology-based limits will ensure that dissolved oxygen criteria are met in the receiving water. pH--Compliance with the technology-based limits of 6.0 to 9.0 will assure compliance with the water quality standards of surface waters because of the high buffering capacity of marine water. Fecal Coliform--Ecology modeled the numbers of fecal coliform by simple mixing analysis using the technology-based limit of 400 organisms per 100 ml and a dilution factor of 37. 1/7/16 Page 24 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Under critical conditions, modeling predicts no violation of the water quality criterion for fecal coliform. Therefore, the proposed permit includes the technology-based effluent limit for fecal coliform bacteria. Turbidity--Ecology evaluated the impact of turbidity based on the range of total suspended solids in the effluent and turbidity of the receiving water. Ecology expects no violations of the turbidity criteria outside the designated mixing zone provided the facility meets its technology- based total suspended solids permit limits. Toxic Pollutants--Federal regulations (40 CFR 122.44) require Ecology to place limits in NPDES permits on toxic chemicals in an effluent whenever there is a reasonable potential for those chemicals to exceed the surface water quality criteria. Ecology does not exempt facilities with technology-based effluent limits from meeting the surface water quality standards. The following toxic pollutants are present in the discharge: chlorine, ammonia, and heavy metals. Ecology conducted a reasonable potential analysis on these parameters to determine whether it would require effluent limits in this permit. Ammonia's toxicity depends on that portion which is available in the unionized form. The amount of unionized ammonia depends on the temperature, pH, and salinity of the receiving marine water. To evaluate ammonia toxicity, Ecology used the available receiving water information from ambient stations and Ecology spreadsheet tools. Ecology determined that chlorine, ammonia, and heavy metals pose no reasonable potential to exceed the water quality criteria at the critical condition using procedures given in EPA, 1991 and as described above. Ecology's determination assumes that this facility meets the other effluent limits of this permit. Water quality criteria for most metals published in chapter 173-201A WAC are based on the dissolved fraction of the metal (see footnotes to table WAC 173-201A-240(3); 2006). Port Angeles may provide data clearly demonstrating the seasonal partitioning of the dissolved metal in the ambient water in relation to an effluent discharge. Ecology may adjust a metal's translator on a site-specific basis when data is available clearly demonstrating the seasonal partitioning in the ambient water in relation to an effluent discharge. Temperature--The state temperature standards [WAC 173-201A-200-210 and 600-612] include multiple elements: • Annual summer maximum threshold criteria(June 15 to September 15) • Supplemental spawning and rearing season criteria(September 15 to June 15) • Incremental warming restrictions • Protections against acute effects Ecology evaluates each criterion independently to determine reasonable potential and derive permit limits. • Annual summer maximum and supplementary spawning/rearing criteria 1/7/16 Page 25 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Each water body has an annual maximum temperature criterion [WAC 173-201A- 200(1)(c), 210(1)(c), and Table 602]. These threshold criteria (e.g., 12, 16, 17.5, 20°C) protect specific categories of aquatic life by controlling the effect of human actions on summer temperatures. Some waters have an additional threshold criterion to protect the spawning and incubation of salmonids (9°C for char and 13°C for salmon and trout) [WAC 173-201A- 602, Table 602]. These criteria apply during specific date-windows. The threshold criteria apply at the edge of the chronic mixing zone. Criteria for most fresh waters are expressed as the highest seven-day average of daily maximum temperature (7-DADMax). The 7-DADMax temperature is the arithmetic average of seven consecutive measures of daily maximum temperatures. Criteria for marine waters and some fresh waters are expressed as the highest one-day annual maximum temperature (1-DMax). • Incremental Warming Criteria The water quality standards limit the amount of warming human sources can cause under specific situations [WAC 173-201A-200(1)(c)(i)-(ii), 210(1)(c)(i)-(ii)]. The incremental warming criteria apply at the edge of the chronic mixing zone. At locations and times when background temperatures are cooler than the assigned threshold criterion, point sources are permitted to warm the water by only a defined increment. These increments are permitted only to the extent doing so does not cause temperatures to exceed either the annual maximum or supplemental spawning criteria. At locations and times when a threshold criterion is being exceeded due to natural conditions, all human sources, considered cumulatively, must not warm the water more than 0YC above the naturally warm condition. When Ecology has not yet completed a TMDL, our policy allows each point source to warm water at the edge of the chronic mixing zone by 0YC. This is true regardless of the background temperature and even if doing so would cause the temperature at the edge of a standard mixing zone to exceed the numeric threshold criteria. Allowing a 0YC warming for each point source is reasonable and protective where the dilution factor is based on 25 percent or less of the critical flow. This is because the fully mixed effect on temperature will only be a fraction of the 0YC cumulative allowance (0.075°C or less) for all human sources combined. • Protections for Temperature Acute Effects Instantaneous lethality to passing fish: The upper 99'percentile daily maximum effluent temperature must not exceed 33°C, unless a dilution analysis indicates ambient temperatures will not exceed 33°C two seconds after discharge. General lethality and migration blockage: Measurable (0.3°C)increases in temperature at the edge of a chronic mixing zone are not allowed when the receiving water temperature exceeds either a 1DMax of 23°C or a 7DADMax of 22°C. 1/7/16 Page 26 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Lethality to incubating fish: Human actions must not cause a measurable (0.3°C) warming above 17.5°C at locations where eggs are incubating. Reasonable Potential Analysis Annual summer maximum and incremental warming criteria: Ecology calculated the reasonable potential for the discharge to exceed the annual summer maximum and the incremental warming criteria at the edge of the chronic mixing zone during critical conditions. No reasonable potential exists to exceed the temperature criterion where: (Criterion+ 0.3) > [Criterion+(Teffluent95 —Criterion)/DF]. (16 +0.3) >(16+(25— 16)/510). Therefore, the proposed permit does not include a temperature limit. The permit requires additional monitoring of effluent. Ecology will reevaluate the reasonable potential during the next permit renewal. H. Human Health Washington's water quality standards include 91 numeric human health-based criteria that Ecology must consider when writing NPDES permits. These criteria were established in 1992 by the U.S. EPA in its National Toxics Rule (40 CFR 131.36). The National Toxics Rule allows states to use mixing zones to evaluate whether discharges comply with human health criteria. Ecology determined the effluent may contain chemicals of concern for human health, based on the facility's status as an EPA major discharger. Ecology evaluated the discharge's potential to violate the water quality standards as required by 40 CFR 122.44(d) by following the procedures published in the Technical Support Document for Water Quality-Based Toxics Control (EPA/505/2-90-001) and Ecology's Permit Writer's Manual to make a reasonable potential determination. The evaluation showed that the discharge has no reasonable potential to cause a violation of water quality standards, and an effluent limit is not needed. L Sediment Quality The aquatic sediment standards (chapter 173-204 WAC) protect aquatic biota and human health. Under these standards Ecology may require a facility to evaluate the potential for its discharge to cause a violation of sediment standards (WAC 173-204-400). You can obtain additional information about sediments at the Aquatic Lands Cleanup Unit website. htip://www.ecy.wa.goy/progr6ams/tcp/smu/sediment.html The facility has performed sediment testing in 1996, 2003/2004, and 2010. These tests were done at Outfall 9001 and the CSO outfalls 906, 907, 908, and 910. With the change to the new Outfall 9002 from Outfall 9001 and the planned reduction in discharges at the CSOs, it was determined to let the facility transition to the new discharge points and then determine the need for any additional sediment testing. Once the CSO reductions occur and the flows are mostly directed to Outfall 9002, the need for sediment testing will be re-evaluated based on the success of the CSO 1/7/16 Page 27 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 reductions and flow split to Outfalls #001 and 9002. The next permit term may include additional sediment testing requirements. J. Whole Effluent Toxicity The water quality standards for surface waters forbid discharge of effluent that has the potential to cause toxic effects in the receiving waters. Many toxic pollutants cannot be measured by commonly available detection methods. However, laboratory tests can measure toxicity directly by exposing living organisms to the wastewater and measuring their responses. These tests measure the aggregate toxicity of the whole effluent, so this approach is called whole effluent toxicity (WET) testing. Some WET tests measure acute toxicity and other WET tests measure chronic toxicity. • Acute toxicity tests measure mortality as the significant response to the toxicity of the effluent. Dischargers who monitor their wastewater with acute toxicity tests find early indications of any potential lethal effect of the effluent on organisms in the receiving water. • Chronic toxicity tests measure various sublethal toxic responses, such as reduced growth or reproduction. Chronic toxicity tests often involve either a complete life cycle test on an organism with an extremely short life cycle, or a partial life cycle test during a critical stage of a test organism's life. Some chronic toxicity tests also measure organism survival. Laboratories accredited by Ecology for WET testing know how to use the proper WET testing protocols, fulfill the data requirements, and submit results in the correct reporting format. Accredited laboratory staff knows about WET testing and how to calculate an NOEC, LC50, EC50, IC25, etc. Ecology gives all accredited labs the most recent version of Ecology Publication No. WQ-R-95-80, Laboratory Guidance and Whole Effluent Toxicity Test Review Criteria (htips://fortress.wa.e ov/ecy/publications/Summarages/9580.htm1), which is referenced in the permit. Ecology recommends that Port Angeles send a copy of the acute or chronic toxicity sections(s) of its NPDES permit to the laboratory. All WET testing results conducted in order to monitor for compliance with an acute WET limit assigned in a previous permit met the acute toxicity performance standard defined in WAC 173- 205-020. In addition, Ecology has determined that the Permittee has not made any changes to the facility which would trigger an additional effluent characterization pursuant to WAC 173-205- 060. For these reasons, Ecology has not included the acute WET limit in the proposed permit. Instead, the Permittee must conduct WET testing at the end of the permit term in order to verify that effluent toxicity has not increased. WET testing conducted during effluent characterization showed no reasonable potential for effluent discharges to cause receiving water chronic toxicity. The proposed permit will not include a chronic WET limit. Port Angeles must retest the effluent before submitting an application for permit renewal. • If this facility makes process or material changes which, in Ecology's opinion, increase the potential for effluent toxicity, then Ecology may (in a regulatory order, by permit modification, or in the permit renewal) require the facility to conduct additional effluent characterization 1/7/16 Page 28 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 • If WET testing conducted for submittal with a permit application fails to meet the performance standards in WAC 173-205-020, Ecology will assume that effluent toxicity has increased. Port Angeles may demonstrate to Ecology that effluent toxicity has not increased by performing additional WET testing after the process or material changes have been made. K. Groundwater Quality Limits The groundwater quality standards (chapter 173-200 WAC) protect beneficial uses of groundwater. Permits issued by Ecology must not allow violations of those standards (WAC 173-200-100). Port Angeles does not discharge wastewater to the ground. No permit limits are required to protect groundwater. L. Comparison of Effluent Limits with the Previous Permit Issued on July 15, 2008 Table 12 Comparison of Previous and Proposed Effluent Limits Previous Effluent Limits: Proposed Effluent Limits: Outfall#001 Outfall#001 &#002 Parameter Basis of Average Average Average Average Limit Monthly Weekly Monthly Weekly 25 , 25 CBOD5 Technology 905 lbsg/day 40 mg/L 905 lbsg/day 40 mg/L 85%removal 11358 lbs/day 85%removal 11358 lbs/day 30 mg/L, 30 mg/L, 1,676 TSS Technology 1,676 lbs/day, 45 mg/L lbs/day, 45 mg/L, 85%removal 2,515 lbs/day 85%removal 21515 lbs/day Basis of Monthly Weekly Monthly Weekly Parameter Geometric Geometric Geometric Geometric Limit Mean Limit Mean Limit Mean Limit Mean Limit Fecal Coliform Technology 200/100 mL 400/100 mL 200/100 mL 400/100 mL Bacteria pH Technology 6.0-9.0 SU 6.0-9.0 SU No statistically significant Acute Whole difference in test organism Effluent W Q survival between the acute NA Toxicity critical effluent concentration (WET) (ACEC),2.7%of the effluent, and the control Parameter Basis of Average Maximum Average Maximum Limit Monthly Daily Monthly Daily 1/7/16 Page 29 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Previous Effluent Limits: Proposed Effluent Limits: Outfall#001 Outfall#001 &#002 Parameter Basis of Average Average Average Average Limit Monthly Weekly Monthly Weekly Total Residual Technology 0.25 mg/L 0.65 mg/L 0.50 mg/L 0.75 mg/L Chlorine IV. MONITORING REQUIREMENTS Ecology requires monitoring, recording, and reporting (WAC 173-220-210 and 40 CFR 122.41) to verify that the treatment process is functioning correctly and that the discharge complies with the permit's effluent limits. If a facility uses a contract laboratory to monitor wastewater, it must ensure that the laboratory uses the methods and meets or exceeds the method detection levels required by the permit. The permit describes when facilities may use alternative methods. It also describes what to do in certain situations when the laboratory encounters matrix effects. When a facility uses an alternative method as allowed by the permit, it must report the test method, detection level (DL), and quantitation level (QL) on the discharge monitoring report or in the required report. A. Wastewater Monitoring The monitoring schedule is detailed in the proposed permit under Special Condition S2. Specified monitoring frequencies take into account the quantity and variability of the discharge, the treatment method, past compliance, significance of pollutants, and cost of monitoring. The required monitoring frequency is consistent with agency guidance given in the current version of Ecology's Permit Writer's Manual (Publication Number 92-09) for Trickling Filter Plants > 2.0 mgd Average Design Flow. Ecology has included some additional monitoring of nutrients in the proposed permit to establish a baseline for this discharger. It will use this data in the future as it develops TMDLs for dissolved oxygen and establishes WLAs for nutrients. Monitoring of sludge quantity and quality is necessary to determine the appropriate uses of the sludge. Biosolids monitoring is required by the current state and local solid waste management program and also by EPA under 40 CFR 503. As a pretreatment POTW,the city of Port Angeles is required to sample influent,primary clarifier effluent, final effluent, and sludge for toxic pollutants in order to characterize the industrial input. Sampling is also done to determine if pollutants interfere with the treatment process or pass- through the plant to the sludge or the receiving water. The city of Port Angeles will use the monitoring data to develop local limits which commercial and industrial users must meet. B. Lab Accreditation Ecology requires that facilities must use a laboratory registered or accredited under the provisions of chapter 173-50 WAC, Accreditation of Environmental Laboratories, to prepare all monitoring 1/7/16 Page 30 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 data(with the exception of certain parameters). Ecology accredited the laboratory at this facility for: Table 13 Accredited Parameters Parameter Name Category Method Name Matrix Description Turbidity General Chemistry SM 2130 B-01 Non-Potable Water TSS General Chemistry SM 2540 D-97 Non-Potable Water Chlorine (Residual), General Chemistry SM 4500-C1 G-00 Non-Potable Water Total pH General Chemistry SM 4500-H+B-00 Non-Potable Water Ammonia General Chemistry SM 4500-NH3 D-97 Non-Potable Water Dissolved Oxygen General Chemistry SM 4500-0 G-01 Non-Potable Water BOD General Chemistry SM 5210 B-01 Non-Potable Water Fecal Coliform-count Microbiology SM 9222 D (m-FC)-97 Non-Potable Water C. Effluent Limits which are Near Detection or Quantitation Levels The water quality-based effluent concentration limits may be near the limits of current analytical methods to detect or accurately quantify. The Method Detection Level(MDL) also known as Detection Level(DL)is the minimum concentration of a pollutant that a laboratory can measure and report with a 99 percent confidence that its concentration is greater than zero (as determined by a specific laboratory method). The Quantitation Level(QL)is the level at which a laboratory can reliably report concentrations with a specified level of error. Estimated concentrations are the values between the DL and the QL. Ecology requires permitted facilities to report estimated concentrations. When reporting maximum daily effluent concentrations, Ecology requires the facility to report"less than X"where X is the required detection level if the measured effluent concentration falls below the detection level. V. OTHER PERMIT CONDITIONS A. Reporting and Record Keeping Ecology based Special Condition S3 on its authority to specify any appropriate reporting and record keeping requirements to prevent and control waste discharges (WAC 173-220-210). B. Prevention of Facility Overloading Overloading of the treatment plant is a violation of the terms and conditions of the permit. To prevent this from occurring, RCW 90.48.110 and WAC 173-220-150 require the city of Port Angeles to: • Take the actions detailed in proposed permit Special Condition S4. • Design and construct expansions or modifications before the treatment plant reaches existing capacity. 1/7/16 Page 31 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 • Report and correct conditions that could result in new or increased discharges of pollutants. Special Condition S4 restricts the amount of flow. C. Operation and Maintenance The proposed permit contains Special Condition S.5 as authorized under RCW 90.48.110, WAC 173-220-150, chapter 173-230 WAC, and WAC 173-240-080. Ecology included it to ensure proper operation and regular maintenance of equipment, and to ensure that the city of Port Angeles takes adequate safeguards so that it uses constructed facilities to their optimum potential in terms of pollutant capture and treatment. D. Pretreatment Duty to Enforce Discharge Prohibitions This provision prohibits the publicly owned treatment works (POTW) from authorizing or permitting an industrial discharger to discharge certain types of waste into the sanitary sewer. • The first section of the pretreatment requirements prohibits the POTW from accepting pollutants which causes "pass-through" or"interference." This general prohibition is from 40 CFR §403.5(a). Appendix C of this fact sheet defines these terms. • The second section reinforces a number of specific state and federal pretreatment prohibitions found in WAC 173-216-060 and 40 CFR §403.5(b). These reinforce that the POTW may not accept certain wastes,which: 1. Are prohibited due to dangerous waste rules. 2. Are explosive or flammable. 3. Have too high or low of a pH (too corrosive, acidic or basic). 4. May cause a blockage such as grease, sand,rocks, or viscous materials. 5. Are hot enough to cause a problem. 6. Are of sufficient strength or volume to interfere with treatment. 7. Contain too much petroleum-based oils,mineral oil, or cutting fluid. 8. Create noxious or toxic gases at any point. 40 CFR Part 403 contains the regulatory basis for these prohibitions, with the exception of the pH provisions which are based on WAC 173-216-060. 1/7/16 Page 32 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 • The third section of pretreatment conditions reflects state prohibitions on the POTW accepting certain types of discharges unless the discharge has received prior written authorization from Ecology. These discharges include: 1. Cooling water in significant volumes. 2. Stormwater and other direct inflow sources. 3. Wastewaters significantly affecting system hydraulic loading, which do not require treatment. Ecology delegated authority to the city of Port Angeles for permitting, monitoring, and enforcement over industrial users discharging to their treatment system to provide more direct and effective control of pollutants. Ecology oversees the delegated Industrial Pretreatment Program to assure compliance with federal pretreatment regulations (40 CFR Part 403) and categorical standards and state regulations (chapter 90.48 RCW and chapter 173-216 WAC). As sufficient data becomes available, the city of Port Angeles must,in consultation with Ecology, reevaluate its local limits in order to prevent pass-through or interference. If any pollutant causes pass-through or interference, or exceeds established sludge standards, the city of Port Angeles must establish new local limits or revise existing local limits as required by 40 CFR 403.5. In addition, Ecology may require revision or establishment of local limits for any pollutant that causes a violation of water quality standards or established effluent limits, or that causes whole effluent toxicity. Ecology may modify this permit to incorporate additional requirements relating to the establishment and enforcement of local limits for pollutants of concern. E. Solid Wastes To prevent water quality problems the facility is required in permit Special Condition S7 to store and handle all residual solids (grit, screenings, scum, sludge, and other solid waste)in accordance with the requirements of RCW 90.48.080 and state water quality standards. The final use and disposal of sewage sludge from this facility is regulated by U.S. EPA under 40 CFR 503, and by Ecology under chapter 70.957 RCW, chapter 173-308 WAC `Biosolids Management," and chapter 173-350 WAC "Solid Waste Handling Standards." The disposal of other solid waste is under the jurisdiction of the Clallam County Health Department. Requirements for monitoring sewage sludge and record keeping are included in this permit. Ecology will use this information,required under 40 CFR 503, to develop or update local limits. F. Combined Sewer Overflows Combined sewer systems are sewers that are designed to collect rainwater runoff, domestic sewage, and industrial wastewater in the same piping system. Most of the time, combined sewer systems transport all wastewater to a sewage treatment plant, where it is treated and then discharged to a water body. During periods of heavy rainfall or snowmelt, however, the wastewater volume in a combined sewer system can exceed the capacity of the combined sewer system or treatment plant. For this reason, combined sewer systems are designed to overflow 1/7/16 Page 33 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 occasionally and discharge excess wastewater directly to nearby streams, rivers, or other water bodies. Chapter 173-245 WAC and EPA's CSO control policy (59 FR 18688) identify the required measures for control of overflows from combined sewer systems. CSO Reduction Plan/Long-Term Control Plan and CSO Reduction Plan Amendments Ecology requires municipalities to initially develop CSO reduction plans per chapter 173- 245 WAC requirements. These plans are substantially equivalent to the Long-Term Control Plan (LTCP) as defined by EPA in its CSO control policy. Chapter 173-245 WAC requires that "All CSO sites shall achieve and at least maintain the greatest reasonable reduction, and neither cause violations of applicable water quality standards, nor restrictions to the characteristic uses of the receiving water, nor accumulation of deposits which: (a) Exceed sediment criteria or standards; or (b) have an adverse biological effect." "The greatest reasonable reduction" means control of each CSO outfall such that an average of no more than one untreated discharge may occur per year. Under EPA's CSO Control Policy's presumption approach, CSO controls are presumed to attain WQS if certain performance criteria are met. Ecology presumes that a program that meets the criteria specified in WAC 173-245 and EPA's CSO control policy provides an adequate level of control to meet the water quality-based requirements of the Clean Water Act. This presumption must be verified via a post-construction monitoring program by characterization, monitoring, and modeling of the system, including consideration of sensitive areas. Nine Minimum Controls Municipalities with combined sewer overflow outfalls must implement nine minimum controls as technology-based standards for CSO discharges. The nine minimum controls are largely programmatic policies and practices designed to minimize the impacts untreated CSOs have on human health and the environment. It is not possible with current knowledge and technology to calculate numeric water quality-based effluent limits for CSOs. Ecology may include numeric water quality-based effluent limits in the future permits only after the long-term control plan is in place and after collection of sufficient water quality data. The nine minimum controls include: 1. Use proper operations and maintenance practices within the combined collection system to reduce the magnitude, frequency and duration of CSOs. 2. Implement procedures that maximize storage capacity of the combined collection system. 3. Minimize pollution from non-domestic wastewater sources through close management of a pretreatment program. 4. Maximize treatable flow to the wastewater treatment plant during wet weather. 5. Prevent CSO discharges during dry weather and properly report any dry weather CSO discharges immediately to Ecology. 1/7/16 Page 34 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 6. Implement procedures to control solid and floatable materials in CSOs. 7. Implement and maintain a pollution prevention program designed to keep pollutants from entering the combined sewer system. 8. Establish aprocess to notify the public when and where CSOs occur. 9. Monitor CSO outfalls to characterize CSO impacts and the efficacy of CSO controls, including event-based monitoring of all CSO flow quantity, frequency and duration. CSO Monitoring The proposed permit requires the city of Port Angeles to monitor the volume, duration and precipitation associated with each CSO discharge event at each identified outfall. Annual CSO Report The city of Port Angeles must submit annual reports according to the requirements of WAC 173-245-090(1). This report: (a) details the past year's frequency and volume of combined sewage discharge from each CSO site, (b) explains the previous year's CSO reduction accomplishments, and (c) lists the projects planned for the next year. The report must indicate whether a CSO site has increased over the baseline annual condition. If an increase has occurred, the Permittee must propose a project and/or schedule to reduce that site below its baseline conditions. The report must document implementation of the nine minimum controls, and wet weather operation (flow blending) at the treatment plant. The city of Port Angeles must also assess in its annual reports and CSO reduction plan amendment whether identified outfalls meet the state standard of one untreated discharge per year per CSO. Assessment may be based on a long-term average which is currently defined as five years. Post-Construction Monitoring Program The federal CSO control policy (59 FR 18688) requires post-construction monitoring to verify implemented CSO control strategies comply with water quality standards. Post- construction monitoring applies to any CSO outfall that is controlled to meet the "greatest reasonable reduction" of combined sewer overflows, as defined in chapter 173-245 WAC. Implementation requires development of a monitoring plan and completion of a data report that documents compliance. This may be implemented in the next permit term. EPA is currently developing guidance on post-construction monitoring plans. G. Outfall Evaluation The proposed permit requires the city of Port Angeles to conduct an outfall inspection and submit a report detailing the findings of that inspection (Special Condition S10). The inspection must evaluate the physical condition of the discharge pipe and diffusers, and evaluate the extent of sediment accumulations in the vicinity of the outfall. 1/7/16 Page 35 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 H. General Conditions Ecology bases the standardized General Conditions on state and federal law and regulations. They are included in all individual domestic wastewater NPDES permits issued by Ecology. VI. PERMIT ISSUANCE PROCEDURES A. Permit Modifications Ecology may modify this permit to impose numerical limits, if necessary to comply with water quality standards for surface waters, with sediment quality standards, or with water quality standards for groundwater, based on new information from sources such as inspections, effluent monitoring, outfall studies, and effluent mixing studies. Ecology may also modify this permit to comply with new or amended state or federal regulations. B. Proposed Permit Issuance This proposed permit meets all statutory requirements for Ecology to authorize a wastewater discharge. The permit includes limits and conditions to protect human health and aquatic life, and the beneficial uses of waters of the state of Washington. Ecology proposes to issue this permit for a term of five years. VII. REFERENCES FOR TEXT AND APPENDICES Environmental Protection Agency(EPA) 1992.National Toxics Rule. Federal Register,V. 57,No. 246, Tuesday, December 22, 1992. 1991. Technical Support Document for Water Quality-based Toxics Control. EPA/505/2-90-001. 1988. Technical Guidance on Supplementary Stream Design Conditions for Steady State Modeling. USEPA Office of Water,Washington, D.C. 1985. Water Quality Assessment:A Screening Procedure for Toxic and Conventional Pollutants in Surface and Ground Water.EPA/600/6-85/002a. 1983. Water Quality Standards Handbook. USEPA Office of Water,Washington, D.C. Tsivoglou, E.C., and J.R.Wallace. 1972. Characterization of Stream Reaeration Capacity.EPA-R3-72-012. (Cited in EPA 1985 op.cit.) Washington State Department of Ecology. December 2011.Permit Writer's Manual. Publication Number 92-109 (https://fortress.wa. ovg/ecy/gublications/SummmPages/92109.html) September 2011. Water Quality Program Guidance Manual Supplemental Guidance on Implementing Tier II Antidegradation.Publication Number 11-10-073 (https://fortress.wa. ovg/ecy/gublications/summarypages/1110073.html) May 2011. Technical Memorandum -Dilution Modeling of Port Angeles WWTP New Outfall. 1/7/16 Page 36 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 October 2010 (revised). Water Quality Program Guidance Manual Procedures to Implement the State's Temperature Standards through NPDES Permits.Publication Number 06-10-100 (littps://fortress.wa. ov/ecv/gublications/summaryLages/0610100.html) Laws and Regulations (httg://www.ecy.wa.gov/laws-rules/index.btml) Permit and Wastewater Related Information (http://www.ecy.wa. ov/programs/wgl/permits/guidance.html) Water Pollution Control Federation. 1976. Chlorination of Wastewater. Wright, R.M., and A.J. McDonnell. 1979.In-stream Deoxygenation Rate Prediction.Journal Environmental Engineering Division, ASCE. 105(EE2). (Cited in EPA 1985 op.cit.) 1/7/16 Page 37 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 APPENDIX A- PUBLIC INVOLVEMENT INFORMATION Ecology proposes to reissue a permit to the city of Port Angeles WWTP. The permit includes wastewater discharge limits and other conditions. This fact sheet describes the facility and Ecology's reasons for requiring permit conditions. Ecology placed a Public Notice of Application on June 12, 2013, and June 16, 2013, in the Peninsula Daily News to inform the public about the submitted application and to invite comment on the reissuance of this permit. Ecology will place a Public Notice of Draft on September 28, 2015, in the Peninsula Daily News to inform the public and to invite comment on the proposed draft National Pollutant Discharge Elimination System permit and fact sheet. The notice: • Tells where copies of the draft permit and fact sheet are available for public evaluation (a local public library, the closest regional or field office,posted on our website). • Offers to provide the documents in an alternate format to accommodate special needs. • Asks people to tell us how well the proposed permit would protect the receiving water. • Invites people to suggest fairer conditions,limits, and requirements for the permit. • Invites comments on Ecology's determination of compliance with antidegradation rules. • Urges people to submit their comments,in writing,before the end of the comment period. • Tells how to request a public hearing about the proposed NPDES permit. • Explains the next step(s)in the permitting process. Ecology has published a document entitled Frequently Asked Questions about Effective Public Commenting, which is available on our website at htlps://fortress.wa.gov/ecy/�ublications/SummMPa,�4es/0307023.html. You may obtain further information from Ecology by telephone, 360-407-6279, or by email at cares .cholski&ecy.wa.gov, or by writing to the address listed below. Water Quality Permit Coordinator Department of Ecology Southwest Regional Office P.O. Box 47775 Olympia, WA 98504-7775 The primary author of this permit and fact sheet is Dave Dougherty. 1/7/16 Page 38 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 APPENDIX B--YOUR RIGHT TO APPEAL You have a right to appeal this permit to the Pollution Control Hearing Board (PCHB) within 30 days of the date of receipt of the final permit. The appeal process is governed by chapter 43.21B RCW and chapter 371-08 WAC. "Date of receipt"is defined in RCW 43.21B.001(2) (see glossary). To appeal you must do the following within 30 days of the date of receipt of this permit: • File your appeal and a copy of this permit with the PCHB (see addresses below). Filing means actual receipt by the PCHB during regular business hours. • Serve a copy of your appeal and this permit on Ecology in paper form - by mail or in person. (See addresses below.) E-mail is not accepted. You must also comply with other applicable requirements in chapter 43.21B RCW and chapter 371-08 WAC. ADDRESS AND LOCATION INFORMATION Street Addresses Mailing Addresses Department of Ecology Department of Ecology Attn: Appeals Processing Desk Attn: Appeals Processing Desk 300 Desmond Drive Southeast P.O. Box 47608 Lacey, WA 98503 Olympia, WA 98504-7608 Pollution Control Hearings Board Pollution Control Hearings Board 1111 Israel Road Southwest, Suite 301 P.O. Box 40903 Tumwater,WA 98501 Olympia, WA 98504-0903 1/7/16 Page 39 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 APPENDIX C--GLOSSARY I-DMax or I-day Maximum Temperature -- The highest water temperature reached on any given day. This measure can be obtained using calibrated maximum/minimum thermometers or continuous monitoring probes having sampling intervals of thirty minutes or less. 7-DADMax or 7-day Average of the Daily Maximum Temperatures -- The arithmetic average of seven consecutive measures of daily maximum temperatures. The 7-DADMax for any individual day is calculated by averaging that day's daily maximum temperature with the daily maximum temperatures of the three days prior and the three days after that date. Acute Toxicity --The lethal effect of a compound on an organism that occurs in a short time period, usually 48 to 96 hours. AKART -- The acronym for "all known, available, and reasonable methods of prevention, control and treatment." AKART is a technology-based approach to limiting pollutants from wastewater discharges, which requires an engineering judgment and an economic judgment. AKART must be applied to all wastes and contaminants prior to entry into waters of the state in accordance with RCW 90.48.010 and 520,WAC 173-200-030(2)(c)(ii), and WAC 173-216-110(1)(a). Alternate Point of Compliance -- An alternative location in the ground water from the point of compliance where compliance with the ground water standards is measured. It may be established in the ground water at locations some distance from the discharge source,up to,but not exceeding the property boundary and is determined on a site specific basis following an AKART analysis. An "early warning value"must be used when an alternate point is established. An alternate point of compliance must be determined and approved in accordance with WAC 173-200-060(2). Ambient Water Quality-- The existing environmental condition of the water in a receiving water body. Ammonia -- Ammonia is produced by the breakdown of nitrogenous materials in wastewater. Ammonia is toxic to aquatic organisms, exerts an oxygen demand, and contributes to eutrophication. It also increases the amount of chlorine needed to disinfect wastewater. Annual Average Design Flow (AADF -- average of the daily flow volumes anticipated to occur over a calendar year. Average Monthly Discharge Limit -- The average of the measured values obtained over a calendar month's time. Background Water Quality -- The concentrations of chemical, physical, biological or radiological constituents or other characteristics in or of ground water at a particular point in time upgradient of an activity that has not been affected by that activity, [WAC 173-200-020(3)]. Background water quality for any parameter is statistically defined as the 95 percent upper tolerance interval with a 95 percent confidence based on at least eight hydraulically upgradient water quality samples. The eight samples are collected over a period of at least one year, with no more than one sample collected during any month in a single calendar year. Best Management Practices (BMPs) -- Schedules of activities, prohibitions of practices, maintenance procedures, and other physical, structural and/or managerial practices to prevent or reduce the pollution of waters of the state. BMPs include treatment systems, operating procedures, and 1/7/16 Page 40 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 practices to control: plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage. BMPs may be further categorized as operational, source control, erosion and sediment control, and treatment BMPs. BOD5 -- Determining the five-day Biochemical Oxygen Demand of an effluent is an indirect way of measuring the quantity of organic material present in an effluent that is utilized by bacteria. The BOD5 is used in modeling to measure the reduction of dissolved oxygen in receiving waters after effluent is discharged. Stress caused by reduced dissolved oxygen levels makes organisms less competitive and less able to sustain their species in the aquatic environment. Although BOD5 is not a specific compound, it is defined as a conventional pollutant under the federal Clean Water Act. Bypass -- The intentional diversion of waste streams from any portion of a treatment facility. Categorical Pretreatment Standards -- National pretreatment standards specifying quantities or concentrations of pollutants or pollutant properties, which may be discharged to a POTW by existing or new industrial users in specific industrial subcategories. Chlorine -- A chemical used to disinfect wastewaters of pathogens harmful to human health. It is also extremely toxic to aquatic life. Chronic Toxicity -- The effect of a compound on an organism over a relatively long time, often 1/10 of an organism's lifespan or more. Chronic toxicity can measure survival, reproduction or growth rates, or other parameters to measure the toxic effects of a compound or combination of compounds. Clean Water Act (CWA -- The federal Water Pollution Control Act enacted by Public Law 92-500, as amended by Public Laws 95-217, 95-576, 96-483, 97-117;USC 1251 et seq. Compliance Inspection-Without Sampling -- A site visit for the purpose of determining the compliance of a facility with the terms and conditions of its permit or with applicable statutes and regulations. Compliance Inspection-With Sampling -- A site visit for the purpose of determining the compliance of a facility with the terms and conditions of its permit or with applicable statutes and regulations. In addition it includes as a minimum, sampling and analysis for all parameters with limits in the permit to ascertain compliance with those limits; and, for municipal facilities, sampling of influent to ascertain compliance with the 85 percent removal requirement. Ecology may conduct additional sampling. Composite Sample -- A mixture of grab samples collected at the same sampling point at different times, formed either by continuous sampling or by mixing discrete samples. May be "time-composite" (collected at constant time intervals) or "flow-proportional" (collected either as a constant sample volume at time intervals proportional to stream flow, or collected by increasing the volume of each aliquot as the flow increased while maintaining a constant time interval between the aliquots). Construction Activity-- Clearing, grading, excavation, and any other activity, which disturbs the surface of the land. Such activities may include road building; construction of residential houses, office buildings, or industrial buildings; and demolition activity. 1/7/16 Page 41 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Continuous Monitoring--Uninterrupted,unless otherwise noted in the permit. Critical Condition -- The time during which the combination of receiving water and waste discharge conditions have the highest potential for causing toxicity in the receiving water environment. This situation usually occurs when the flow within a water body is low, thus, its ability to dilute effluent is reduced. Date of Receipt— This is defined in RCW 43.21B.001(2) as five business days after the date of mailing; or the date of actual receipt,when the actual receipt date can be proven by a preponderance of the evidence. The recipient's sworn affidavit or declaration indicating the date of receipt, which is unchallenged by the agency, constitutes sufficient evidence of actual receipt. The date of actual receipt,however,may not exceed forty-five days from the date of mailing. Detection Limit-- See Method Detection Level. Dilution Factor(DF) --A measure of the amount of mixing of effluent and receiving water that occurs at the boundary of the mixing zone. Expressed as the inverse of the percent effluent fraction, for example, a dilution factor of 10 means the effluent comprises 10 percent by volume and the receiving water 90 percent. Distribution Uniformity-- The uniformity of infiltration (or application in the case of sprinkle or trickle irrigation) throughout the field expressed as a percent relating to the average depth infiltrated in the lowest one-quarter of the area to the average depth of water infiltrated. Early Warning Value -- The concentration of a pollutant set in accordance with WAC 173-200-070 that is a percentage of an enforcement limit. It may be established in the effluent, ground water, surface water, the vadose zone or within the treatment process. This value acts as a trigger to detect and respond to increasing contaminant concentrations prior to the degradation of a beneficial use. Enforcement Limit -- The concentration assigned to a contaminant in the ground water at the point of compliance for the purpose of regulation, [WAC 173-200-020(11)]. This limit assures that a ground water criterion will not be exceeded and that background water quality will be protected. Engineering Report-- A document that thoroughly examines the engineering and administrative aspects of a particular domestic or industrial wastewater facility. The report must contain the appropriate information required in WAC 173-240-060 or 173-240-130. Fecal Coliform Bacteria -- Fecal coliform bacteria are used as indicators of pathogenic bacteria in the effluent that are harmful to humans. Pathogenic bacteria in wastewater discharges are controlled by disinfecting the wastewater. The presence of high numbers of fecal coliform bacteria in a water body can indicate the recent release of untreated wastewater and/or the presence of animal feces. Grab Sample -- A single sample or measurement taken at a specific time or over as short a period of time as is feasible. Ground Water -- Water in a saturated zone or stratum beneath the surface of land or below a surface water body. 1/7/16 Page 42 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Industrial User -- A discharger of wastewater to the sanitary sewer that is not sanitary wastewater or is not equivalent to sanitary wastewater in character. Industrial Wastewater -- Water or liquid-carried waste from industrial or commercial processes, as distinct from domestic wastewater. These wastes may result from any process or activity of industry, manufacture, trade or business; from the development of any natural resource; or from animal operations such as feed lots, poultry houses, or dairies. The term includes contaminated storm water and, also, leachate from solid waste facilities. Interference -- A discharge which, alone or in conjunction with a discharge or discharges from other sources,both: • Inhibits or disrupts the POTW, its treatment processes or operations, or its sludge processes,use or disposal; and • Therefore is a cause of a violation of any requirement of the POTW's NPDES permit (including an increase in the magnitude or duration of a violation) or of the prevention of sewage sludge use or disposal in compliance with the following statutory provisions and regulations or permits issued thereunder (or more stringent State or local regulations): Section 405 of the Clean Water Act, the Solid Waste Disposal Act (SWDA) (including title II, more commonly referred to as the Resource Conservation and Recovery Act (RCRA), and including State regulations contained in any State sludge management plan prepared pursuant to subtitle D of the SWDA), sludge regulations appearing in 40 CFR Part 507, the Clean Air Act, the Toxic Substances Control Act, and the Marine Protection, Research and Sanctuaries Act. Local Limits -- Specific prohibitions or limits on pollutants or pollutant parameters developed by a POTW. Major Facility -- A facility discharging to surface water with an EPA rating score of> 80 points based on such factors as flow volume, toxic pollutant potential, and public health impact. Maximum Daily Discharge Limit -- The highest allowable daily discharge of a pollutant measured during a calendar day or any 24-hour period that reasonably represents the calendar day for purposes of sampling. The daily discharge is calculated as the average measurement of the pollutant over the day. Maximum Day Design Flow (MDDF) -- The largest volume of flow anticipated to occur during a one- day period, expressed as a daily average. Maximum Month Design Flow (MMDF) -- The largest volume of flow anticipated to occur during a continuous 30-day period, expressed as a daily average. Maximum Week Design Flow (MWDF) -- The largest volume of flow anticipated to occur during a continuous seven-day period, expressed as a daily average. Method Detection Level (MDL) -- The minimum concentration of a substance that can be measured and reported with 99 percent confidence that the pollutant concentration is above zero and is determined from analysis of a sample in a given matrix containing the pollutant. 1/7/16 Page 43 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Minor Facility -- A facility discharging to surface water with an EPA rating score of< 80 points based on such factors as flow volume, toxic pollutant potential, and public health impact. Mixing Zone -- An area that surrounds an effluent discharge within which water quality criteria may be exceeded. The permit specifies the area of the authorized mixing zone that Ecology defines following procedures outlined in state regulations (chapter 173-201A WAC). National Pollutant Discharge Elimination System (NPDES) -- The NPDES (Section 402 of the Clean Water Act) is the federal wastewater permitting system for discharges to navigable waters of the United States. Many states, including the state of Washington, have been delegated the authority to issue these permits. NPDES permits issued by Washington State permit writers are joint NPDES/State permits issued under both state and federal laws. pH -- The pH of a liquid measures its acidity or alkalinity. It is the negative logarithm of the hydrogen ion concentration. A pH of 7 is defined as neutral and large variations above or below this value are considered harmful to most aquatic life. Pass-through -- A discharge which exits the POTW into waters of the State in quantities or concentrations which, alone or in conjunction with a discharge or discharges from other sources, is a cause of a violation of any requirement of the POTW's NPDES permit(including an increase in the magnitude or duration of a violation), or which is a cause of a violation of State water quality standards. Peak Hour Design Flow (PHDF) -- The largest volume of flow anticipated to occur during a one-hour period, expressed as a daily or hourly average. Peak Instantaneous Design Flow (PIDF) -- The maximum anticipated instantaneous flow. Point of Compliance -- The location in the ground water where the enforcement limit must not be exceeded and a facility must comply with the Ground Water Quality Standards. Ecology determines this limit on a site-specific basis. Ecology locates the point of compliance in the ground water as near and directly downgradient from the pollutant source as technically, hydrogeologically, and geographically feasible, unless it approves an alternative point of compliance. Potential Significant Industrial User (PSIU) --A potential significant industrial user is defined as an Industrial User that does not meet the criteria for a Significant Industrial User, but which discharges wastewater meeting one or more of the following criteria: I. Exceeds 0.5 percent of treatment plant design capacity criteria and discharges <25,000 gallons per day or; 2. Is a member of a group of similar industrial users which, taken together, have the potential to cause pass through or interference at the POTW(e.g. facilities which develop photographic film or paper, and car washes). Ecology may determine that a discharger initially classified as a potential significant industrial user should be managed as a significant industrial user. Quantitation Level (QL) -- Also known as Minimum Level of Quantitation (ML) — The lowest level at which the entire analytical system must give a recognizable signal and acceptable calibration 1/7/16 Page 44 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 point for the analyte. It is equivalent to the concentration of the lowest calibration standard, assuming that the lab has used all method-specified sample weights, volumes, and cleanup procedures. The QL is calculated by multiplying the MDL by 3.18 and rounding the result to the number nearest to (1, 2, or 5) x 10",where n is an integer(64 FR 30417). ALSO GIVEN AS: The smallest detectable concentration of analyte greater than the Detection Limit (DL) where the accuracy (precision & bias) achieves the objectives of the intended purpose. (Report of the Federal Advisory Committee on Detection and Quantitation Approaches and Uses in Clean Water Act Programs Submitted to the US Environmental Protection Agency December 2007). Reasonable Potential -- A reasonable potential to cause a water quality violation, or loss of sensitive and/or important habitat. Responsible Corporate Officer -- A president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy- or decision-making functions for the corporation, or the manager of one or more manufacturing, production, or operating facilities employing more than 250 persons or have gross annual sales or expenditures exceeding $25 million (in second quarter 1980 dollars), if authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures (40 CFR 122.22). Significant Industrial User (SIU) -- 1. All industrial users subject to Categorical Pretreatment Standards under 40 CFR 403.6 and 40 CFR Chapter I, Subchapter N and; 2. Any other industrial user that: discharges an average of 25,000 gallons per day or more of process wastewater to the POTW (excluding sanitary, noncontact cooling, and boiler blow-down wastewater); contributes a process wastestream that makes up 5 percent or more of the average dry weather hydraulic or organic capacity of the POTW treatment plant; or is designated as such by the Control Authority* on the basis that the industrial user has a reasonable potential for adversely affecting the POTW's operation or for violating any pretreatment standard or requirement [in accordance with 40 CFR 403.8(f)(6)]. Upon finding that the industrial user meeting the criteria in paragraph 2, above, has no reasonable potential for adversely affecting the POTW's operation or for violating any pretreatment standard or requirement, the Control Authority* may at any time, on its own initiative or in response to a petition received from an industrial user or POTW, and in accordance with 40 CFR 403.8(f)(6), determine that such industrial user is not a significant industrial user. *The term "Control Authority" refers to the Washington State Department of Ecology in the case of non-delegated POTWs or to the POTW in the case of delegated POTWs. Slug Discharge -- Any discharge of a non-routine, episodic nature, including but not limited to an accidental spill or a non-customary batch discharge to the POTW. This may include any pollutant released at a flow rate that may cause interference or pass through with the POTW or in any way violate the permit conditions or the POTW's regulations and local limits. 1/7/16 Page 45 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Soil Scientist-- An individual who is registered as a Certified or Registered Professional Soil Scientist or as a Certified Professional Soil Specialist by the American Registry of Certified Professionals in Agronomy, Crops, and Soils or by the National Society of Consulting Scientists or who has the credentials for membership. Minimum requirements for eligibility are: possession of a baccalaureate, masters, or doctorate degree from a U.S. or Canadian institution with a minimum of 30 semester hours or 45 quarter hours professional core courses in agronomy, crops or soils, and have 5,3,or I years, respectively, of professional experience working in the area of agronomy, crops, or soils. Solid Waste -- All putrescible and non-putrescible solid and semisolid wastes including, but not limited to, garbage, rubbish, ashes, industrial wastes, swill, sewage sludge, demolition and construction wastes, abandoned vehicles or parts thereof, contaminated soils and contaminated dredged material, and recyclable materials. Soluble BOD5 -- Determining the soluble fraction of Biochemical Oxygen Demand of an effluent is an indirect way of measuring the quantity of soluble organic material present in an effluent that is utilized by bacteria. Although the soluble BOD5 test is not specifically described in Standard Methods, filtering the raw sample through at least a 1.2 um filter prior to running the standard BOD5 test is sufficient to remove the particulate organic fraction. State Waters -- Lakes, rivers, ponds, streams, inland waters, underground waters, salt waters, and all other surface waters and watercourses within the jurisdiction of the state of Washington. Stormwater--That portion of precipitation that does not naturally percolate into the ground or evaporate, but flows via overland flow, interflow,pipes, and other features of a storm water drainage system into a defined surface water body, or a constructed infiltration facility. Technology-Based Effluent Limit -- A permit limit based on the ability of a treatment method to reduce the pollutant. Total Coliform Bacteria--A microbiological test, which detects and enumerates the total coliform group of bacteria in water samples. Total Dissolved Solids--That portion of total solids in water or wastewater that passes through a specific filter. Total Suspended Solids (TSS) -- Total suspended solids is the particulate material in an effluent. Large quantities of TSS discharged to a receiving water may result in solids accumulation. Apart from any toxic effects attributable to substances leached out by water, suspended solids may kill fish, shellfish, and other aquatic organisms by causing abrasive injuries and by clogging the gills and respiratory passages of various aquatic fauna. Indirectly, suspended solids can screen out light and can promote and maintain the development of noxious conditions through oxygen depletion. Upset -- An exceptional incident in which there is unintentional and temporary noncompliance with technology-based permit effluent limits because of factors beyond the reasonable control of the Permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, lack of preventative maintenance, or careless or improper operation. 1/7/16 Page 46 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Water Quality-Based Effluent Limit--A limit imposed on the concentration of an effluent parameter to prevent the concentration of that parameter from exceeding its water quality criterion after discharge into receiving waters. 1/7/16 Page 47 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 APPENDIX D--TECHNICAL CALCULATIONS Several of the Excel® spreadsheet tools used to evaluate a discharger's ability to meet Washington State water quality standards can be found in the PermitCalc workbook on Ecology's webpage at: htip://www.ecy.wa.goy/programs/wq/permits/guidance.html. Simple Mixing: Ecology uses simple mixing calculations to assess the impacts of certain conservative pollutants, such as the expected increase in fecal coliform bacteria at the edge of the chronic mixing zone boundary. Simple mixing uses a mass balance approach to proportionally distribute a pollutant load from a discharge into the authorized mixing zone. The approach assumes no decay or generation of the pollutant of concern within the mixing zone. The predicted concentration at the edge of a mixing zone (C,T,z)is based on the following calculation: Cmz = Ca + (Ce-Ca) DF where: Cc =Effluent Concentration Ca=Ambient Concentration DF=Dilution Factor Reasonable Potential Anal: The spreadsheets — Reasonable Potential, and LimitCalc in Ecology's PermitCalc Workbook determine reasonable potential (to violate the aquatic life and human health water quality standards) and calculate effluent limits. The process and formulas for determining reasonable potential and effluent limits in these spreadsheets are taken directly from the Technical Support Document for Water Quality-based Toxics Control, (EPA 505/2-90-001). The adjustment for autocorrelation is from EPA (1996a), and EPA (1996b). 1/7/16 Page 48 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 APPENDIX E--RESPONSE TO COMMENTS A public comment period was held from September 28, 2015 to October 27, 2015. Comments were received from the Permittee and from Puget Soundkeeper Alliance. During the comment period, the following comments were received from David Freed, Wastewater Division Source Control Specialist, the city of Port Angeles. Comment 1: Special Condition S6.A.l.b. — Pretreatment General Requirements. Should Minor Industrial Users (MNs) be included along with SNs? How many State Waste Discharge permits has Ecology issued that contribute to the Port Angeles system? Does Ecology intend the City to replace any such permits with SIU permits? If so, how soon? Do we still need to consult with Ecology for MIU permits? Response 1: The NPDES permit does not reinforce the activities which the Permittee is doing now with respect to Minor Industrial Users (minor non-domestic dischargers). These are businesses that are not discharging enough to be considered Significant Industrial Users (SNs). The permit language that begins the pretreatment section states that the Permittee is required to administer the Permittee's approved program, which includes provisions for permitting Minor Industrial Users (MNs). The Permittee is expected to continue to implement those provisions in the same way as they are now despite the lack of explicit reinforcement of such activities in the permit. That said, the Permittee is free to categorize such Users as SIU's at this juncture if they believe such is warranted. The next comment on this sub-section is with respect to how soon the Permittee would be expected to issue permits for discharges which Ecology has permitted. A query of our PARIS database showed that we have issued two pretreatment permits for the 1) Port Angeles Landfill (ST0006247) and 2) Port Angeles Landfill Transfer Station (ST006249). The Permittee should reissue these permits within 180 days after the effective date of the NPDES permit. Ecology then expects the Permittee to issue permits prior to allowing discharge to the POTW of any new discharger. The next question at S6.A.Lb was whether this means the Permittee does not need to consult with Ecology prior to issuance of MIU permits. That is correct,however, Ecology will now have to do a Pretreatment Compliance Inspection or Audit of the Permittee's pretreatment program every two years. During such inspections, both MIU and SIU permits will be reviewed for consistency with pretreatment standards and requirements and their permitting rules. The Permittee is free to continue to consult with Ecology on MIU permits if they so desire. Comment 2: Special Condition S6.A.l.d. —Pretreatment General Requirements. Must we inspect and monitor MIUs? 1/7/16 Page 49 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Response 2: The Permittee is expected to continue to oversee MNs in accordance with the policies and procedures of its approved pretreatment program,including MNs. Comment 3: Special Condition S6.A.Lf - Pretreatment General Requirements. The citation in this section should end with(viii),not(vii). Response 3: You are correct, this section should cite the definition of significant noncompliance as 403.8(f)(2)(viii). Comment 4: Special Condition S6.A.3. - Pretreatment General Requirements. Do we need to continue to evaluate whether MNs as well as SNs need slug discharge control plans? Response 4: Yes, to the extent that a User meets the criteria of the approved program for requiring such review it needs to continue to be done. Also, MIU's which have a potential to cause a slug discharge may be considered SIU's for that reason alone should the Permittee so desire. Comment 5: Special Condition S6.A.5.c.- Pretreatment General Requirements. This section should refer to A.6. There is no section A.7. Response 5: The observation that S6.A.5.c should refer to Subsection A.6 rather than A.7 is correct. Comment 6: Special Condition S6.B.1.- Pretreatment Montoring Requirements. This section should refer to S6.B.11. Response 6: The observation that S6.B.1 should refer to S6.B.I I instead of S63.4 is correct. Comment 7: Special Condition S6.B.5.-Pretreatment Montoring Requirements. No more clean mercury stuff? 1/7/16 Page 50 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Response 7: The question at S6.B.5 is whether the Permittee still needs to do clean sampling of the influent and effluent for mercury. This is a good one to resolve. They do not need to do clean sampling for mercury in the influent,but they should continue to do clean sampling for mercury in the effluent. Comment 8: Special Condition S6.B.9.-Pretreatment Montoring Requirements. Does this replace the previous permit's reference to US EPA Method 1669 for clean mercury sampling? Response 8: The question at S6.B.9 is whether they need to do clean sampling of the sludges. No, only clean sampling for mercury in the effluent is needed. As with the influent, normal methods of analysis for mercury in the sludge is sufficient for Ecology needs. The following comments were received from Kathryn Neal, P.E., Engineering Manager, the city of Port Angeles. Comment 9: Sections S4A Design Criteria, and S5F Bypass Procedures will need to be modified. S5.F Bypass Procedures. We request that the permit contain a provision that allows primary effluent to be conveyed around the TF/SC during storm events when CSO flows are being received by the plant. The section on bypass procedures in the permit describes circumstances under which the plant is permitted to divert waste streams from a portion of the treatment facility. None of the conditions listed pertain specifically to storm events when additional combined sewer flows will be routed to the treatment plant as a result of implementation of the City's CSO Reduction Plan. As described above, after the Phase 1 CSO improvements, peak plant flows will reach 13.4 mgd on a more frequent basis and may exceed 13.4 mgd for short durations. The TF/SC system will be upgraded to increase its capacity from 10.6 to 13.4 mgd. After the Phase 2 CSO improvements,peak plant flows may reach as high as 20 mgd. In both cases, any primary effluent flow in excess of 13.4 mgd will be conveyed around the TF/SC system. Blending of primary effluent and secondary effluent flows will thus take place at total plant influent flows between 13.4 and 20 mgd. The blended flows will be disinfected and dechlorinated prior to discharge to the outfall. We request that the permit contains a provision that allows primary effluent to be conveyed around the TF/SC during storm events when CSO flows are being received by the plant. Response 9: The bypass procedures section was modified to allow operation of the approved wet weather high flow bypass system. The design criteria section was also modified. We often do not list a Maximum Daily Design Flow, so this value was removed. 1/7/16 Page 51 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Comment 10: The Maximum Month Design Flow is 10.8 MGD, slightly more than the 10.6 MGD shown on the draft permit. Response 10: The design flow in S4 was adjusted as requested. Comment 11: We request that you review S9.139. The header paragraph should be updated, and item d. should more clearly specify what water quality data Ecology expects the City to provide. Response 11: The section was updated in recognition that the Permittee is past the point of developing an intial baseline on the CSOs and at instead at the point of controled CSOs. Comment 12: S9,page 33. It would be good to standardize a name for Outfall 4002, it's called different things in different places. I like `primary outfall'. Then the other outfall could be called `old City outfall'. Other terms might be `new City outfall' or `refurbished industrial outfall' or `ex- industrial outfall' (as it's called in the fact sheet). Response 12: It would be good to standardize the name of Outfall 9002. The name was changed in the table on page 33 to primary outfall. In the future Ecology will try to stay with primary outfall, though we did not go back thru this permit and fact sheet to clean up all the references to the outfall. Comment 13: Fact Sheet, page 5. The City installed a rock trap and four-celled storage vault at the headworks in 2014 that attenuates batch flows from septage haulers. There are currently no plans for additional construction of a separate septage receiving station. Response 13: Paragraph on receiving station was deleted. Comment 14: Fact Sheet, Page 5, last paragraph. The MMDF is being increased to 10.8 MGD as a result of improvements constructed to implement the Combined Sewer Overflow Reduction plan. Under high flow conditions in wet weather,the plant can accept flows up to 20 MGD. 1/7/16 Page 52 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Response 14: Design flow was adjusted as requested. Comment 15: Fact Sheet, Page 6. Collection System Status, first paragraph. It has 17 pump stations. Pump Station 4 will be upgraded to 28 MGD in 2016 as part of the CSO reduction plan. The wastewater main from Francis St was also upgraded, to a peak flow capacity of 20 MGD. The remaining wastewater (2MGD peak flow) comes through a gravity line serving the area north of the WWTP. Storm flows in excess of the treatment plant capacity are routed to the 5 MG storage tank for temporary storage, and routed back to the treatment plant when capacity is available. Response 15: This paragraph was adjusted. Comment 16: Fact Sheet, Page 6. Collection System Status, last paragraph. Because of the implementation of the CSO reduction plan, the combined sewer collection system has a total peak design flow capacity of 50 MGD, which will result in control of combined sewer overflows into Port Angeles harbor. Response 16: The paragraph was adjusted. Comment 17: Fact Sheet, Page 6, Treatment Processes - The treatment plant improvements installed in 2013 and 2014 result in a maximum month flow of 10.8 million gallons a day(mgd),Peak daily flow is limited to 13.4 mgd, except during winter storm events when up to 20 mgd may flow through the plant. The TF/SC maximum capacity is 13.4 mgd. Flows in excess of 20 mgd, are routed to the storage tank for temporary storage before being returned to the plant for treatment. Most flows will be pumped to the treatment plant from a 28mgd pump station located downtown through new force mains, or flow through the new Francis St. gravity main. Response 17: The paragraph was slightly adjusted. Comment 18: We have started training our staff on the new NPDES Permit, and noticed a difference in item S3.F.2.a, Immediate Reporting of Permit Violations. The second bullet point now reads "collection system overflows", and the 2008 language was "collection system overflows which may reach surface waters". Under the new requirement, we would report an overflow of a manhole, even if it is contained and never reaches a receiving water. Please confirm that this is 1/7/16 Page 53 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Ecology's intention. I understand that the new language is standard nowadays. This means you will be getting more reports of small incidents from us. Response 18: Yes,it is Ecology intention that all overflows be reported, even if they do not reach surface water. Comment 19: Another issue involves the third bullet point in S2.F.2.a, "plant bypasses discharging to marine surface waters". Consistent with our earlier comments on section S5F, we request that when the treatment plant is receiving flows between 13.4 and 20MGD during rainstorms, that this is acknowledged as our authorized operating procedure. These flows would bypass the trickling filter/solids contact system, but will be disinfected before discharge from Outfall 002 (the refurbished industrial outfall that now serves as the wastewater treatment plant's primary outfall). It would possible for us to report the duration and volume of these flows, but they should not be accounted as an untreated CSO, and certainly not as a permit violation. Response 19: The bullet was adjusted. Comments from Richard A. Smith on behalf of Puget Soundkeeper Alliance. Comment 20: Soundkeeper strongly supports the statement in the fact sheet (p.11) as appropriate and a generally accurate interpretation of applicable law: "Ecology usually does not develop limits for pollutants not reported in the permit application but may be present in the discharge. The permit does not authorize discharge of the non-reported pollutants. During the five-year permit term, the facility's effluent discharge conditions may change from those conditions reported in the permit application. The facility must notify Ecology if significant changes occur in any constituent [40 CFR 122.42(a)]. Until Ecology modifies the permit to reflect additional discharge of pollutants, a permitted facility could be violating its permit." Soundkeeper's concern is that the prohibition of discharge of pollutants not identified by the City in its permit application materials does not appear in the permit itself. To ensure that this limitation is a meaningful and enforceable limitation on the discharge, the permit should include a provision clearly "prohibiting" (i.e., not merely "not authorizing") discharges of pollutants that were not disclosed in application materials. Response 20: The permit does include a condition in section G4 that the Permittee must give notice to Ecology of any change in the nature or an increase in the quantity of pollutants discharged. Therefore, the statement in the fact sheet is already in the permit. In addition, while we appreciate your concern with pollutants not mentioned in the application, the data that we have seen suggests that one of the best ways for a domestic wastewater treatment plant to have a positive effect on all pollutants is to do a good job on the pollutants listed in the permit. 1/7/16 Page 54 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Comment 21: Appendix A to the draft permit identifies detection limits ("DLs") and quantitation levels ("QLs") for the individual pollutant analyses required by the permit. Where do these DLs and QLs come from? Many of them are different from those given in the federal regulations. Where do the QLs come from? A QL is typically calculated as the DL multiplied by 3.18, but that does not fit most of the given figures. It is also puzzling that closely related pollutants to be analyzed with the same lab method have apparently inconsistent numbers; for instance, on p. 55, the QLs for PCB-1248 and PCB-1260 are both identified as 0.5 µg/L while the DL for PCB-1248 is 0.25 µg/L and that for PCB-1260 is 0.13 µg/L. How, when, and by whom were the QLs and DLs in these tables developed? Response 21: Ecology compiled the list of Appendix A methods, detection levels (DLs), and quantitation levels (QLs) over several years, beginning in 1993. Early efforts relied on input on the DLs and QLs from Ecology staff, EPA Region 10, and several public and private laboratories. In January 2008, EPA Region 10 published a document titled "Table of Limits" that included a list of methods with known detection limits, instrument detection limits, and method detection limits. Also in early 2008, Ecology conducted a survey of all labs accredited in Washington for organics analysis. After comparing the results from Ecology's survey and the Region 10 Table of Limits, Ecology's Water Quality program staff assembled Appendix A in consultation with Ecology's Manchester Laboratory staff, Ecology's Environmental Assessment Program (EAP) staff, and the agency's Quality Assurance (QA) Officer. The version of Appendix A included in the proposed permit is a product of the efforts described above. Ecology recognizes that many older EPA Part 136 methods lack method detection levels (e.g. EPA Method 608.2). Even when a method includes detection levels, Appendix A values for DLs and QLs may be lower than those published with the method. This reflects advances in laboratory analysis procedures allowing lower DLs and QLs. As noted above, the actual values included in Appendix A by Ecology were influenced by a survey of laboratories and input from experienced chemists at Ecology's Manchester lab. Ecology's Water Quality Program maintains Appendix A and updates the appendix on a regular basis, primarily to add newly approved EPA Part 136 methods. Consideration of edits to DLs and QLs occurs in consultation with appropriate staff at the Manchester Laboratory and Ecology's QA Officer. Ecology last updated the appendix in August 2014. Ecology added Appendix A to its permit to ensure Permittees meet the detection and quantitation levels necessary for adequate assessment. Consistent with WAC 173-201A-260(3)(h), Appendix A was developed in accordance with the "Guidelines Establishing Test Procedures for the Analysis of Pollutants" (40 C.F.R. Part 136). Use of Part 136 test methods is required by 40 CFR Part 122.410)(4). In general, this comment applies more to Ecology's agency-wide policies and application of the State's WQ standards and EPA required testing methods, rather than to how these standards were applied to this individual permit. Ecology developed this permit consistent with the State's water quality standards,the methods described in its Permit Writers' Manual, and relevant Federal laws and rules. 1/7/16 Page 55 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Comment 22: Soundkeeper urges the use of more accurate and precise lab analytical methods for screening for permit renewal application requirements per condition S2.A.6. Although the permit language is not specific in requiring the methods identified in Appendix A for this monitoring (it should), it appears that this is the intent. The Appendix A methods appear to be taken from the list of methods approved for NPDES compliance monitoring at 40 CFR 136. For some of these pollutants, better lab methods with lower DLs and PQLs have been developed but not included in 40 CFR 136. Since the S2.A.6. monitoring is not for permit compliance but to provide information to inform the next round of permit issuance, it is sensible and appropriate to require use of the better methods. For example, Appendix A specifies Method 608 for PCB analysis, while Method 1668C has PQLs orders of magnitude lower and is more useful for determining total PCB concentration. Other pollutants identified in Appendix A,including those designated as PBTs by Ecology, are subject to water quality criteria that are far below the PQLs for the methods required. If Ecology really wants to determine whether the pollutants screened for are present at levels of concern, it needs to update the list of required analytical methods to avoid or minimize this problem (PQLs far above criteria). Response 22: Consistent methods are used for both compliance and permit application monitoring. The methods used are accurate and precise and switching methods for different purposes would generally lead to less useful data. Comment 23: Condition SLA appears to authorize discharges from outfalls 001 and 002 without distinction or limitation relative to each other. The fact sheet indicates that the facility has switched or is switching to use 002 as the primary outfall, and states (p. 8) that "Outfall 001 will now only be used during high tides and flows when the recently acquired ex-industrial outfall (002) cannot handle the flow." The permit should incorporate this requirement for use of outfall 002 except in specified circumstances, and address the circumstance in which outfall 002 capacity is exceeding during low tide. The permit also lacks effluent limitations for discharge flow from the respective outfalls,which seems inappropriate. The flow capacity of outfall 002 also needs to be identified. Response 23: The new effluent diversion structure at the treatment plant is designed to send flow to the new primary Outfall 002. This outfall is ready to be put to use as soon as this permit is issued. All flow will be directed to the new primary outfall, unless during high flow events during high tide where the diversion structure may start to surcharge and then overflow to Outfall 001 as needed. The circumstance that a discharge to Outfall 001 will occur is the water level in the diversion structure reaching the weir elevation of 43.50'. This should take a flow of around 44 MGD, depending on tide height. The dilution factors of both outfalls are similar enough that the same effluent limitations apply to both. 1/7/16 Page 56 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Comment 24: Upon what information is the authorization of mixing zones and dilution factors based? The fact sheet cites no mixing zone analysis study or report. What is the information that Ecology relies on to satisfy the requirements of WAC 173-201A-400(4)? Response 24: Both outfalls 001 & 002 have extensive studies and reports completed on them. Outfall 001 has the Final Outfall Mixing Zone Study (January 26, 1996) by Brown and Caldwell. The new primary Outfall 002 has studies back to the Outfall Location Studies Port Angeles, Washington (August 1971) by ITT Rayonier and up to the Technical Memorandum Dilution Modeling of Port Angeles WWTP New Outfall (May 2011) by Ecology. The technical memorandum is cited in the Fact Sheet. Comment 25: The receiving water, Port Angeles Harbor, is 303(d) listed for fecal coliform, yet it appears that the reasonable potential analysis for fecal coliform incorporates a mixing zone and a dilution factor of 37 (fact sheet p. 25). Under WAC 173-201A-400(4) and EPA mixing zone guidance, consideration of dilution when the receiving waters lack assimilative capacity for the pollutant of concern is inappropriate without justification. Does Port Angeles Harbor have remaining assimilative capacity for fecal coliform despite its 303(d) listing? What information does Ecology have to satisfy WAC 173-201A-400(4) for fecal coliform, given the 303(d)listing? Response 25: Portions of Port Angeles Harbor are on the 303(d) list for fecal coliform, but not in the area of Outfalls 001 & 002. The new primary Outfall 002 discharges outside of Port Angeles Harbor into the Strait of Juan de Fuca in an area that is not on the 303(d) list for any pollutants. Likewise, Outfall 001,while on the border/entrance to Port Angeles Harbor,is located in an unlisted area. Comment 26: The fact sheet's Appendix D, which is supposed to include technical calculations for reasonable potential analysis, is incomplete — no technical calculations are provided. These are a necessary and important part of the fact sheet. Response 26: Appendix D can include technical calculations, but no specific calculation is necessary or required. There are many documents and calculations that support this permit, but they cannot all be included in the fact sheet. Comment 27: The mixing zone descriptions provided in the permit and fact sheet are inadequate under WAC 173-201A-400(1) and WAC 173-220-130(3)(c) (permits must specify the "dimensions" of a mixing zone). Condition S 1.B purports to describe mixing zones for outfalls 001 and 002 as "a circle"with a radius of a given number of feet"measured from the center of each discharge port." 1/7/16 Page 57 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 This is nonsense and unintelligible. Both of the outfalls' diffusers have multiple discharge ports and the shape derived from radii centered on these cannot be a single circle as implied. The shapes of the mixing zones can be a series of neighboring or overlapping circles, or something else. The permit must accurately describe the dimensions of the mixing zones. Response 27: We believe the description in the fact sheet is accurate in that it correctly describes the mixing zone as the aggregation of a series of circles centered on each port. The descriptions are adequate and are not in violation of WAC 173-201A-400(1) and WAC 173-220-130(3)(c). Comment 28: Soundkeeper does not understand the basis for the no reasonable potential determination for temperature as discussed at fact sheet pp. 26 —27. Where is the policy described at the bottom of page 26? Response 28: The policy can be found in the Water Quality Program Guidance Manual: Procedures to Implement the State's Temperature Standards through NPDES Permits (Publication 06-10-100). Comment 29: The fact sheet discusses sediment impact evaluation on pp. 27 — 28. There is no reference to any analysis of sediments in the vicinity of outfall 002. Surely some information exists from previous regulatory activity concerning this formerly industrial outfall. Soundkeeper suggests that evaluation of this information, and, possibly, collection of additional outfall 002 sediment monitoring data, should be done now to assess the potential for sediment impacts per WAC 173- 204-400(6). No matter what discharge quality improvements result from the cited planned activities, there may be impacts at outfall 002 sediments already that already warrant inclusion of effluent limitations, monitoring, or a sediment impact zone. At a minimum, the permit should prescribe a sediment monitoring program for outfall 002 to provide information for the next permitting round. Response 29: There have been studies of sediment in the area of the outfalls. Nothing significant for this permit has been found. The previous discharge to the industrial outfall was of a different nature than the future discharge and no pertinent sediments impacts are known to exist. For a discharge with little industrial input, proper treatment, and to an active marine environment, the existing sediments impact analysis is adequate and indicates no need for a sediment monitoring program. Ecology developed this permit consistent with the State's water quality standards, the methods described in its Permit Writers' Manual, and relevant Federal laws and rules. Comment 30: Condition S9, concerning CSOs, states that "[t]his permit does not authorize a discharge from a CSO that causes adverse impacts that threaten characteristic uses of the receiving water ...." 1/7/16 Page 58 FACT SHEET FOR CITY OF PORT ANGELES WASTEWATER TREATMENT PLANT NPDES PERMIT W4 0023973 Soundkeeper urges that this language be modified to affirmatively "prohibit" such discharges to avoid potential enforcement difficulties. Response 30: This is standard language used in all CSO permits. Ecology developed this permit consistent with the State's water quality standards, the methods described in its Permit Writers' Manual, and relevant Federal laws and rules. Comment 31: Condition S9.E. references Ecology's "request" "that CSO discharges be directed preferentially to Outfall 002." Presuming the environmental soundness of this request, Soundkeeper suggests that it be converted into a permit requirement with appropriate specificity. Response 31: The request to preferentially direct CSO discharges to Outfall 002 has been designed into the CSO upgrades with the focus being able to get flow to the WWTP and the CSO storage tank. Overflow from the CSO storage tank goes directly to Outfall 002. A permit requirement is not needed as the approved system is designed to preferentially send flow to Outfall 002. 1/7/16 Page 59