Permit No.: WA0037168 City of Puyallup WWTP


# Fact Sheet

The U.S. Environmental Protection Agency (EPA) Proposes to Reissue a National Pollutant Disc harge Elimination System (NPDES) Permit to Discharge Pollutants Pursuant to the Provi sions of the Clean Water Act (CWA) to: 

### City of Puyallup Wastewater Treatment Plant 1602 18th St NW Puyallup, WA 98371 NPDES Permit Number: WA0037168 Public Notice Start Date: ******, 2014 Public Notice Expiration Date: ******, 2014 Technical Contact: John Drabek 206-553-8257 1-800-424-4372 ext. 3-8257 (within Region 10) Email: drabek.john@epa.gov The EPA Proposes To Reissue NPDES Permit The EPA proposes to reissue the NPDES permit to the facility referenced above. The draft permit places conditions on the discharge of polluta nts from the wastewater treatment plant to waters of the United States. In order to ensure protection of water quality and human health, the permit place limits on the types and amounts of po llutants that can be discharged from each facility. This Fact Sheet includes:

 information on public comment, public hearing, and appeal procedures

 a listing of proposed effluent limitations and other conditions for the facility

 a map and description of the discharge location

 technical material supporting the conditions in the permit Puyallup Tribe Certification The EPA will request that the Puya llup Tribe to certify the NPDES permit for this facility, under Section 401 of the Clean Water Ac t. Comments regarding the certi fication should be directed to:Permit No.: WA0037168 City of Puyallup WWTP 1 Puyallup Tribe Environmental Department 2002 28th Street Tacoma, WA 98404 253 573-7851 Public Comment Persons wishing to comment on or request a pub lic hearing for the draft permit may do so in writing by the expiration date of the Public Notice. All comments or requests for a public hearing should include the name, address and telephone number of the commentator and a concise statement of the exact basis of any comment and the relevant facts upon which it is based. All comments and requests for a public hearing must be in writing and should be submitted to EPA as described in the Public Comments S ection of the attached Public Notice. If no significant comments are received, the tent ative conditions in the draft permit will become final, and the permit will become effective upon issuance. If comments are received, EPA will address the comments and issue the permit. The permit will become effective 33 days after the issuance date, unless a request for an eviden tiary hearing is submitted within 33 days. Documents are Available for Review The draft NPDES permit and related documents can be reviewed or obtained by visiting or contacting EPA’s Regional Office in Seattle be tween 8:30 a.m. and 4:00 p.m., Monday through Friday (See address below). United States Environmental Protection Agency Region 10 1200 Sixth Avenue, OWW-130 Seattle, Washington 98101 (206) 553-0523 or 1-800-424-4372 (within Alaska, Id aho, Oregon and Washington) The fact sheet and draft pe rmit are also available at: EPA Washington Operations Office 300 Desmond Drive SE Lacey, WA 98503 360 753-9080 Puyallup Tribe Environmental Department 3009 E. Portland Ave, Tacoma, WA 98404 253 573-7851 Washington Department of Ecology 300 Desmond Drive SE Lacey, WA 98503 360 407-6275Permit No.: WA0037168 City of Puyallup WWTP 2

LIST OF ACRONYMS AND ABBREVIATIONS

...................................................................................... 4 I. APPLICANT

.................................................................................................................. ........................... 5 II. FACILITY ACTIVITY

......................................................................................................... ................... 5 III. RECEIVING WATER

.......................................................................................................... .................. 5 A. Discharge Location.

........................................................................................................ ..................... 5 B. Benefici al Uses

............................................................................................................ ......................... 5 C. Existing or Potential Impa irments of Water Quality

......................................................................... ... 5 IV. FACILITY BACKGROUND

....................................................................................................... .......... 6 A. Treatment System

........................................................................................................... ..................... 6 B. Permit Background

.......................................................................................................... ..................... 6 C. Compliance Status

.......................................................................................................... ...................... 6 V. EFFLUENT LIMITATIONS

....................................................................................................... ............ 7 VI. PRETREATMENT PROGRAM

...................................................................................................... .... 10 VII. MUNICIPAL SEWAGE SLUDGE /BIOSOLIDS MANAGEMENT

................................................. 10 VIII. MONITORING REQUIREMENTS

................................................................................................. . 10 A. Effluent Monitoring

........................................................................................................ ................... 10 B. Method Detection Limits

..................................................................................................... ............... 13 C. Whole Effluent Toxicity

.................................................................................................... ................. 13 D. Receiving Water Monitoring

................................................................................................. ............. 13 E. Outfall Evaluation

......................................................................................................... ..................... 14 F. Infiltration and Inflow Evaluation

......................................................................................... ............. 14 G. Representative Sampling

.................................................................................................... ................ 15 IX. OTHER PERMIT CONDITIONS

................................................................................................... ..... 15 A. Quality Assu rance Plan

..................................................................................................... ................. 15 B. Arsenic Monitoring

......................................................................................................... ................... 15 C Electronic Submission of Discharge Monitoring Reports

................................................................... 17 D. Operation and Maintenance Plan

............................................................................................. .......... 18 E. Additional Permit Provisions

................................................................................................ .............. 18 X. OTHER LEGAL REQUIREMENTS

................................................................................................... . 18 A. Endangered Species Act

..................................................................................................... ................ 18 B. The Magnuson-Stevens Fishery Co nservation and Management Act

................................................ 20 C. Certification

.............................................................................................................. .......................... 21Permit No.: WA0037168 City of Puyallup WWTP 3 D. Permit Expiration .......................................................................................................... ..................... 21 REFERENCES .................................................................................................................... ....................... 21 APPENDIX A – CITY OF PUYALLUP FACILITY LOCATION ........................................................... 23 APPENDIX B – CITY OF PUYALLUP WASTE STREAMS AND TREATMENT PROCESSES ........ 25 APPENDIX C – BASIS FOR EFFLUENT LIMITATIONS ..................................................................... 27 APPENDIX D – EXAMPLE EFFLUENT LIMIT CALCULATIONS...................................................... 43 APPENDIX E – MONITORING DATA .................................................................................................. .. 51 APPENDIX F – PRE-CERTIFICATION OF DRAFT PERMIT ............................................................. 122

LIST OF TABLES Table 1: Reported Effluent Li mit Violations 2003 Through 2011 Table 2: Outfall 001 Effluent Limits Comparison Table 3: Outfall 001 Monitoring Requirements Table 4: Receiving Water Monitoring Requirements in the Puyallup River Table 5: Ambient Arsenic in the Puyallup River Table B-1: Pollutants Detected in Discharge (2003 to 2011) Table C-1: Dilution Factors at Critical Mixing Conditions Table C-2: BOD5 Draft Limits Table C-3: TSS Draft Limits Table C-4: Unionized Ammonia Criteria Table C-5: Total Ammonia Limits Table C-6: Metals Criter ia for the Puyallup River Table C-7: Metals Limits (total recoverable) for th e City of Puyallup Permit Table C-8: Determination of pH Limits Table D-1: Unionized Ammonia Criteria Table D-2: Reasonable Potentia l Calculations and Limits LIST OF FIGURES Figure 1: Total Recoverable Arsenic in Puya llup Wastewater Treatme nt Plant Effluent Figure A-1: Puyallup Wastewater Tr eatment Facility Outfall Location Figure A-2: Puyallup Wastewater Tr eatment Facility Aerial Photo Figure C-1: Mixing ZonePermit No.: WA0037168 City of Puyallup WWTP 4 LIST OF ACRONYMS AND ABBREVIATIONS AML Average monthly limit BMP Best management practices BOD5 Five-day biochemical oxygen demand CFR Code of Federal Regulations cfs Cubic feet per second CWA Clean Water Act DMR Discharge monitoring report CV Coefficient of variation Ecology Washington St ate Dept. of Ecology EPA United States Environmental Protection Agency lb/day Pounds per day LTA Long term average MDL Maximum daily limit or method detection limit mgd Million gallons per day mg/L Milligrams per liter ml Milliliters MOA Memorandum of agreement NPDES National Pollutant Discharge Elimination System O&M Operation and maintenance POTW Publicly owned treatment works RP Reasonable potential TMDL Total maximum daily load TSD Technical Support Document for Wate r Quality-based Toxics Control , (EPA1991) TSS Total suspended solids USGS United States Geological Survey WWTP Wastewater treatment plant WLA Wasteload allocation μ g/L Micrograms per literPermit No.: WA0037168 City of Puyallup WWTP 5



### I. APPLICANT Facility Name: City of Puya llup Wastewater Treatment Plant NPDES Permit No: WA0037168 Location: 1602 18th St NW, Puyallup, WA 98371 Facility Contact: Don Lange, Wastew ater Treatment Plant Supervisor 

### II. FACILITY ACTIVITY The City of Puyallup owns and operates a municipal treatment facility that provides secondary treatment and disinfection of domestic and industrial wastes prio r to discharge to the Puyallup River. The maximum month desi gn flow of the facility is 13.98 million gallons per day (mgd). In the period from August 2003 through December 2011, the treatment plant had an average annual flow of 4.07 mgd, and a maximum monthly average fl ow of 8.81 mgd. Biosolids generated during the treatment process are hauled by a private contractor to a land application site in eastern Washington. See Appendix A for a map of the location of th e treatment plant and discharge. Appendix B contains additional information on the treatment processes and waste streams. 

### III. RECEIVING WATER A. Discharge Location. The Puyallup Wastewater Treatmen t Plant (WWTP) discharges to the Puyallup River (latitude 47 O 12' 26" N, longitude 122 O 19' 11" W) located within the 1873 survey area of the Puyallup Reservation. The Puyallup Tribe of Indians is the bene ficial owner of the bed and banks (to the mean high water mark) of the Puyallup River within the 1873 survey area of the Puyallup Reservation, which the United States holds in trust for the Tribe. 

### B. Beneficial Uses. The Puyallup Tribe’s Water Quality Standards designate beneficial uses for waters of the Reservation. The current tribal standards for th e Puyallup River designate the river as Class A in the vicinity of the outfall. Characteristic us es include the following: domestic, industrial and agricultural water supply, stock watering, fish a nd shellfish (including salmonids, crustaceans and other shellfish, and other fi sh), wildlife habitat, ceremoni al and religious water use, commerce, navigation, and primary and secondary recreation. 

### C. Existing or Potential Impairments of Water Quality. A 1994 Ecology water quality study of the river iden tified the potential for future problems in meeting the dissolved oxygen criteria if existi ng NPDES facilities reached their design capacity. As a result, Ecology established a seasonal preven tative total maximum daily load (TMDL) for ammonia and five-day biochemical oxygen demand (BOD5) for the Puyallup River basin and tributaries effective May 1 through October 31 (Ecology, 1993 and 1994). Subsequent Puyallup WWTP permits also incorporated a BOD/ammoni a trade as allowed in the 1993 Puyallup River TMDL. See section IV of Appendix C for details. The Puyallup River is also one of many in th e State of Washington that contain naturallyoccurring arsenic in amounts that may be greater than human health criteria for arsenic. ThePermit No.: WA0037168 City of Puyallup WWTP 6 Department of Ecology determined in 2002 1 that arsenic concentrations in Washington rivers and streams are typically in the range of 0.2 - 1.0 ug/L, whereas concen trations greater than 2 to 5 ug/L may indicate contamination from anthropogen ic sources. Upstream Puyallup River arsenic levels from Ecology’s Puyallup river monitoring station #10A070 were found in the range of 0.47 - 1.14 ug/L (data from August 2001 - August 2006) . See Section IX.B. for information about arsenic monitoring required by the draft permit. 

### IV. FACILITY BACKGROUND A. Treatment System The original collection system for the City’s wastewater was constructed in 1905 as a gravity sewer system discharging directly into the P uyallup River. In 1955, a 6.0 mgd sewage treatment plant providing primary treatment and disinfectio n was constructed at the present site. In 1984, the treatment plant was upgraded to a secondary treatment system utiliz ing rotating biological contactors (RBCs). A sewer system rehabilita tion project completed in 1981 significantly reduced inflow and infiltration. In April 1999, the RBCs were replaced by an activated sludge system and chlorination was replaced by ultr aviolet disinfection. Although the original collection system was built as a combined stor m and sanitary system, the system is now 100 percent separated. 

### B. Permit Background In 1997, EPA, the Puyallup Tribe, and Ecol ogy signed a memorandum of agreement (MOA) regarding implementation of the NPDES permit program on the Puyallup Reservation. The MOA recognized that the federal government ha s the authority to issue NPDES permits for discharges to waters of the Reservation. A draft permit for the facility was proposed in June 2000. Because changes were made to the proposed effluent limits following public notice of the draft permit (because of additional background and monitoring data), a new draft pe rmit was prepared and was issued in August 2003. The permit was then modified in April 2008 to include language instituting the facility’s new pretreatment program. An NPDES application for permit issuance was submitted by the permittee on December 17, 2007. The EPA determined that the application wa s timely and complete. Therefore, pursuant to 40 CFR 122.6., the permit has been administrativel y extended and remains fully effective and enforceable. 

### C. Compliance Status Table 1, below, summarizes the reported effluent limit violations for the Puyallup WWTP based on Discharge Monitoring Reports (DMRs) between August 2003 and December 2011.

1 http://www.ecy.wa.gov/pubs/0203045.pdf , Publication No. 02-03-045.Permit No.: WA0037168 City of Puyallup WWTP 7 TABLE 1. E90 Report – Reported Efflue nt Limit Violations 2003 Through 2011

Monitoring Period End Date Code Expansion for Parameter

Code Concentration Average Value Concentration Maximum Value Average Limit Concentration Maximum Limit Concentration Effluent Violation Code for Parameter Measurement Code Expansion for Effluent Violation Code for Parameter Measurement Quantity Average Value Quantity Maximum

Value Average Quantity Limit Maximum Quantity Limit

30-Nov-06 ZINC TOTAL RECOVERABLE 72.4 72.4 70 102 E90 NUMERIC VIOLATION NUMERIC VIOL 1.8 1.8 8.2 11.9

31-Jul-09 MERCURY TOTAL RECOVERABLE 0 >0.0001 0.052 0.072 E90 NU ME RIC VIOLATION NUMERIC VIOL >0 >0 0.006 0.008

30-Jun-06 NITROGEN, AMMONIA TOTAL (AS N) 5 6 4.2 12 E90 NUMERIC VIOLATION NUMERIC VIOL 14 27 490 792

30-Apr-08 LEAD TOTAL RECOVERABLE 0.5 0.5 6.1 10.5 E90 NUMERIC VIOLATION NUMERIC VIOL 0.02 2 0.71 1.22 

### V. EFFLUENT LIMITATIONS EPA followed the Clean Water Act (CWA), tr ibal and federal regulations, and EPA’s 1991 Technical Support Document for Water Quality-Based Toxics Control (TSD) to develop the proposed effluent limits. In general, the CWA requ ires that the effluent limits for a particular pollutant are the more stringent of either th e technology-based or wate r quality-based limits. Appendix C provides the basis for the developmen t of technology-based and water quality-based effluent limits. Technology-based limits are set base d on the level of treatment that is achievable using readily available technol ogy. For publicly owned treatmen t works, federal regulations include technology-based limits for three para meters: five-day biochemical oxygen demand (BOD5), total suspended solids (TSS), and pH. P uyallup Tribal standards have also specified a technology-based limit for fecal coliform bacteria. EPA evaluates the technology-based limits to determ ine whether they are adequate to ensure that water quality standards are met in the receiving wa ter. If the limits are not adequate, EPA must develop additional water quality-based limits. These limits are designed to prevent exceedances of the Puyallup Tribe’s water qu ality standards in the Puyallup River. The proposed permit includes water quality-based limits for BOD5, a mmonia, and copper. Limits for lead, mercury, and zinc were not carried through from the prev ious permit based on the lack of reasonable potential to exceed water quality criteria. New information not available during the development of the previous permit formed the basis for removing these limits without backsliding or risking negative impacts water quality. The new informa tion came in the form of a larger data set obtained using consistent and correct sampling and an alytical methods. This change is consistent with language in Clean Water Act section 303(d)(4)(B ) regarding th e revision of certain effluent limits. Appendix D provides an example calcula tion for the development of a water qualitybased permit limit. Table 2 compares the limits in the existing perm it with those in the draft permit. The draft permit specifies more stringent limits for pH and ammonia during the winter. Recent monitoring data for all other parameters were below the draft permit limits.Permit No.: WA0037168 City of Puyallup WWTP 8

Table 2 Outfall 001 Effluent Limits Comparison

Parameters Average Monthly Limit Average Weekly Limit Maximum Daily Limit

Draft Permit (2013 ) Existing Permit 2 Draft Permit (2013 ) Existing Permit 2 Draft Permit (2013 ) Existing Permit 2

BOD 5 mg/L 30 30 45 45 --- --- lbs/day 1 2,179 2,179 3,268 3,268 --- --- Minimum Percent Removal 85 85 85 85 --- ---

TSS mg/L 30 30 45 45

--- --- lbs/day 1 2,333 2,333 3,499 3,499

--- --- Minimum Percent Removal 85 85 85 85 Fecal Coliform #/100 mL 3 100 100

--- --- --- --- Total Ammonia as N: November 1 - April 30 mg/L 5.4 6.8 --- --- 16.1 17.6 lb/day 793 793

--- --- 2,622 2,862 Total Ammonia as N: May 1 - October 31 mg/L 4.2 4.2

--- --- 12.0 12.0 lb/day 490 490

--- --- 792 792Permit No.: WA0037168 City of Puyallup WWTP 9
Table 2 Outfall 001 Effluent Limits Comparison

Parameters Average Monthly Limit Average Weekly Limit Maximum Daily Limit

Draft Permit (2013 ) Existing Permit 2 Draft Permit (2013 ) Existing Permit 2 Draft Permit (2013 ) Existing Permit 2 Copper, Total Recoverable μg/l 8.5 8.5 --- --- 13.7 13.7 lb/day 0.99 0.99

--- --- 1.60 1.60 Lead, Total Recoverable μg/l NA 6.1

--- --- NA 10.5 lb/day NA 0.71

--- --- NA 1.22 Mercury

μg/l NA 0.052 --- --- NA 0.072 lb/day NA 0.006 --- --- NA 0.008 Zinc, Total Recoverable

μg/l NA 70 --- --- NA 102 lb/day NA 8.2 --- --- NA 11.9 pH, std units 4 6.4 – 9.0 6.4 – 9.0

1. Mass-based loadings are based on a design flow of 13.98 mgd, (or 19.5 mgd for winter ammonia loadings). See Appendix C Basis for Effluent Limits. 2. The existing permit limits were issued in 2003. 3. The draft permit requires that no more than 10% of samples over a 30-day period may exceed 200/100 mL. 4. The draft permit requires that the pH be within the specified range of 6.4 to 9.0 at all times. In addition to the limits for specific parameters, the draft permit authorizes the discharge of only those pollutants resulting from facility processes, waste streams, and operations that have beenPermit No.: WA0037168 City of Puyallup WWTP 10 clearly identified in the permit application pro cess. The draft permit also requires that the discharge be free from floating so lids, visible foam in other than trace amounts, or oily wastes that produce a sheen on the surface of the receiving water.



### VI. PRETREATMENT PROGRAM Section 301(b) of the CWA requi res that industrial users who discharge to publicly owned treatment works comply with pretreatment requi rements established under section 307 of the CWA. The objectives of the pr etreatment program are: 1) to prevent the introduction of pollutants to the treatment system that will in terfere with the plant’s operation, that could pass untreated through the system and contribute to water quality problems, or otherwise be incompatible with the treatment plant, and 2) to improve opportunities to reclaim and recycle municipal and industrial waste water and sludge. The previous permit was modified in April 2008 to introduce a pretreatment program developed by the City in accordance with the general pr etreatment regulations under 40 CFR §403. The modified permit required a local limits evaluation for pollutants of concer n, the institution of a local sewer use ordinance, and th e preparation of policies and pr ocedures necessary to run the program properly. The draft permit includes language addressing ongoing pretreatment operations in the City. The previous and draft permit require that metals analyses be conducted using the most sensitive EPA-approved methods, unless a less sensitiv e method is approved by EPA's Pretreatment Coordinator. This provision ensures that the City will use the most sensitive EPA-approved analytical method currently available when influent or effluent concentrat ions for a particular pollutant are near or below the lowest met hod detection limit without imposing the financial burden of using these methods when a less se nsitive method will provide quantifiable data.



### VII. MUNICIPAL SEWAGE SLUDGE/BIOSOLIDS MANAGEMENT Currently, dewatered sludges are hauled to eastern Washington for land application. The EPA Region 10 separates wastewater and sl udge permitting. The EPA has authority under the CWA to issue separate sludge-only permits for the purposes of regulating biosolids. The EPA may issue a sludge-only permit to each facility at a later date, as appropriate. Until future issuance of a sludge-only permit, slu dge management and disposal activities at each facility continue to be subject to the national sewage sludge st andards at 40 CFR Part 503 and any requirements of the State’s biosolids pr ogram. The Part 503 regulations are selfimplementing, which means that facilities must comply with them whether or not a permit has been issued.



### VIII. MONITORING REQUIREMENTS A. Effluent Monitoring Section 308 of the CWA and fede ral regulation 40 CFR 122.44(i) require that monitoring be included in permits to determine compliance with effluent limitations. Monitoring may also be required to gather data for future effluent lim itations or to monitor effluent impacts on receivingPermit No.: WA0037168 City of Puyallup WWTP 11 water quality. The City of Puyallup is res ponsible for conducting the monitoring and for reporting results to EPA on DMRs. Table 3 comp ares the proposed monitoring requirements in the draft permit to those in the 2003 permit. Monitoring frequency is based on the minimum sampling necessary to adequately monitor the fa cility’s performance as well as the monitoring requirements in the 2003 permit. Continuous temperature monitoring is required to better characteri ze temperature. The State of Washington Department of Ecology Permit Wr iter’s Manual, December 2011, (Publication no. 92-109), page VI-55, states recomm ended analytic protocol for temperature is continuous. The EPA, Tribe, USFWS and NOAA concur continuo us temperature monitoring is necessary. Table 3: Outfall 001 Monitoring Requirements Parameter Draft Sample Frequency 2003 Sample Frequency BOD5, mg/L, lb/day, percent removal1 5/Week 5/Week

TSS, mg/L, lb/day, percent removal1 5/Week 5/Week

Fecal Coliform Bacteria, #/100 mL 5/Week 5/Week

Total Ammonia as N, mg/L 2/Week 2/Week Copper, Total Recoverable, ug/L Monthly Monthly

pH, standard units2 Continuous Continuous Flow, mgd Continuous Continuous Temperature, °C Continuous 5 Daily Chronic Whole Effluent Toxicity Testing Annual Annual

Hardness, mg/L CaCO 3 Monthly Monthly Acute Whole Effluent Toxicity Annual Annual Arsenic, Total Quarterly for 5 yrs (influent and effluent), coinciding where possible with quarterly arsenic NAPermit No.: WA0037168 City of Puyallup WWTP 12 monitoring in the receiving water (Table 4) Arsenic, Inorganic Quarterly for 5 yrs (effluent only), coinciding where possible with quarterly arsenic monitoring in the receiving water (Table 4) NA

Total Kjeldahl Nitrogen, mg/L Monthly NA

Nitrogen, NO2+NO3, mg/L Monthly NA Total Phosphorus, mg/L Monthly NA Notes: 1. The draft permit and the 2003 permit require infl uent and effluent monitoring to determine compliance with effluent limitations and percent removal requirements. 2. The draft permit requires the City to report th e number and duration of pH excursions during the month. 3. Monitoring requirements for ne w parameters (bold text). 4. Arsenic monitoring includes quarterly upst ream ambient monitoring to help evaluate arsenic partitioning and inorganic arseni c reasonable potential (see Table 4). 5. Continuous temperature monitoring must be gin no later than six months after the effective date of the permit. New nutrients monitoring requirements are being a dded in light of findings from the South Puget Sound Dissolved Oxygen Study. The need for this study became evident when, in their 2008 Water Quality Assessment, the Washington Stat e Department of Ecol ogy found 24 locations in South Puget Sound that were impaired due to a lack of dissolved oxygen. The South Puget Sound Dissolved Oxygen Study evaluated a number of different sources fo r nitrogen, as nitrogen is the main pollutant responsible for the low marine dissolved oxygen levels. The study identified the Puyallup River as a source of ni trogen loading into Puge t Sound. EPA determined that the City of Puyallup should conduct monitoring of nutrient species in their effluent to better characterize their contribution of these pollutants to the Puyallup River thr oughout the year given that both nitrogen and phosphorus contribute to a loss of dissolved oxygen in receiving waters. Under the authority of Clean Water Act Section 308, this increased monitoring has been included in the draft permit.Permit No.: WA0037168 City of Puyallup WWTP 13 

### B. Method Detection Limits EPA’s regulations require that Permittees monito r for compliance with effluent limits using methods promulgated by EPA at 40 CFR Part 136. For all pollutants, the draft permit requires the City to use an EPA-approved method with an MDL 0.1 times the effluent limitation or the most sensitive EPA-approved method, whichever is greater. This provision ensures that, to the extent possible, data can be us ed to accurately determine comp liance with permit limits without imposing an undue burden on the City where a less sensitive method will give accurate data. Mercury An August 23, 2007, memorandum from James A. Hanlon to the Water Division Directors clarifies and explains that, in light of existing regulatory requ irements for NPDES permits, only the most sensitive methods, such as Methods 1631E and 245.7, are appropriate in most instances for use in deciding whether to set a permit limita tion for mercury and for sampling and analysis of mercury pursuant to the monitoring requirements within a permit. See Analytical Methods for Mercury in National Pollutant Discharge Elimination System (NPDES) Permits , which is available at http://www.epa.gov/npdes/pubs/mercurymemo_analyticalmethods.pdf

. The permit requires Methods 1631E or 245.7 for mercury monitoring. 

### C. Whole Effluent Toxicity Federal regulations at 40 CFR 122.4 4(d)(1) require that permits contain limits on whole effluent toxicity when a discharge has re asonable potential to cause or contribute to an exceedance of a water quality standard. Section 5, paragraphs 1 and 2 of the Puyallup water quality standards prohibit the discharge of toxic s ubstances in toxic amounts and requi re that toxicity testing be used to determine compliance with this prohibition. Whole effluent toxicity tests are laboratory tests that replicate to the greatest extent possible the total effect and actual environmental exposure of aquatic lif e to effluent toxicants without requiring the identification of specific toxicants. Whole effluent toxicity tests use small vertebrate and invertebrate species and/or plants to measure the aggr egate toxicity of an effluent. There are two different durations of toxicity te sts: acute and chronic. Acute toxicity tests measure survival over a 48- or 96- hour exposure. Chronic toxici ty tests measure reductions in survival, growth, and reproducti on over a 7-day exposure. The City of Puyallup’s 2003 permit required annu al acute and chronic to xicity testing. This testing showed no reasonable potential to caus e or contribute to exceedances of water quality standards. The draft permit continues the annual WET testing frequency required by the previous permit. 

### D. Receiving Water Monitoring Receiving water monitoring is used to evaluate if the effluent is causing or contributing to an instream excursion of the water quality criteria. The draft permit requires the Permittee to conduct ambient monitoring using test methods that achieve the same MDLs as are necessary for effluent sampling. To the extent practicable, r eceiving water monitoring must occur on the same day as effluent sample collection and duri ng low river flow conditions. Upstream and downstream monitoring must also occur on the same day to enable a comparison of downstream concentrations with backgr ound concentrations. The proposed receiving water monitoring requirements for the draft permit are provided in Table 4. The monitori ng frequency has beenPermit No.: WA0037168 City of Puyallup WWTP 14 reduced for this permit cycle based on data collect ed in the previous perm it cycle that confirmed water quality criteria are being met in the receivi ng water. However, for the same reasons stated for continuous temperature monitoring of the effluent, continuous temp erature monitoring is required for the receiving water. Table 4: Receiving Water Monitoring Requirements in the Puyallup River

Parameter Units Upstream Sampling Frequency Downstream Sampling Frequency Sampling Method

Total Ammonia as N mg/L Once/year Once/year Grab Temperature C Continuous Continuous Recording 2 pH standard units Once/year Once/year Grab

Hardness as CaCO 3 mg/L Once/year Once/year Grab Arsenic (total, dissolved, and inorganic) μg/L Quarterly 1 Quarterly 1 Grab

Copper μg/L Once/year Once/year Grab Note: 1 Ambient arsenic monitoring for 5 years as part of Special Condition II. B., Arsenic Monitoring.

2 Continuous temperature monitoring must begin no later than six m onths after the effective date of the permit. 

### E. Outfall Evaluation In early 1998 the City modified the existing diffuse r to prevent damage by gravel and rocks. The diffuser ports are now angled downstream with a “Tide Flex” valve conne cted with a neoprene sleeve and flange. To ensure that the new di ffuser is not damaged by sediment deposition, the draft permit requires the City to c onduct an annual outfall evaluation. 

### F. Infiltration and Inflow Evaluation In the past, significant rainfall ev ents have been a source of pr imary-treated overflows to the Puyallup River from the outfall. Infiltration and inflow to the conveyance system might include rainwater entering manholes, roof drain connect ions, combined stormwater and sewage piping, infiltration through leaky underground pipes, etc. The draft permit requires that the Permittee conduct a comprehensive study that includes a pre liminary evaluation of the sewerage facility and a system-wide inventory/evaluation surv ey that identifies the causes of thePermit No.: WA0037168 City of Puyallup WWTP 15 untreated/primary-treated overflows and contains deadlines for correcti ng the problems. This report is due three years from the effective date of the permit. 

### G. Representative Sampling Federal regulations require representative sampling whenever a bypass, spill, or non-routine discharge of pollutants occurs, if the discharge may reasonably be expected to cause or contribute to a violation of an effluent limit under the permit (40 CFR 122.41[j]). If such a discharge occurs, the City must conduct additional, targeted monitoring to quantify the effects of the discharge on the final effluent. This provision is included in the draft permit because routine monitoring could easily miss a permit violation or water quality standard exceedance resulting from a bypass, spill, or non-routine discharge.



### IX. OTHER PERMIT CONDITIONS A. Quality Assurance Plan Federal regulations require Permittees to properly operate and maintain their facilities, including “adequate laboratory controls a nd appropriate quality assurance procedures” (40 CFR 122.41(e)). To implement this requirement, the draft pe rmit requires that the City update the Quality Assurance Plan (QAP) required by the previous permit to reflect any substantive changes in monitoring requirements. An up-to-date QAP w ill help to ensure that monitoring data are accurate and to explain data anomalies if they occu r. The City is required to implement the plan within 120 days of the effectiv e date of the draft permit. The QAP must include standard operating procedures the City will follow for coll ecting, handling, storing and shipping samples, laboratory analysis, a nd data reporting. 

### B. Arsenic Monitoring Section 308(a)(3)(A) of the Clean Water Act au thorizes EPA to require reports, monitoring equipment or methods, expanded sampling, or any ot her information that would help establish or determine compliance with effluent limits, proh ibitions, effluent standards, pretreatment standards, or standards of performance under the CWA. Further monitoring is necessary in order to investigate the effluent from the City of P uyallup wastewater treatmen t plant with respect to the Puyallup Tribal human health standard fo r arsenic of 0.018 ppb. The permit includes influent, effluent and receiving water monitoring. Figure 1, below, depicts the amount of total reco verable arsenic in the Puyallup WWTP effluent. While this amount of arsenic does not threaten aquatic life, the inorganic portion may be present in sufficient quantities to exceed the human health standard for arsenic given the consumption of both water and aquatic organisms together. Cons equently, the permit requires the Permittee to conduct a limited round of inorganic arsenic monito ring to determine whether or not there should be a follow up study to determine if arsenic in th e treatment plant effluent is naturally-occurring arsenic, or if it is of commercial or industrial origin.Permit No.: WA0037168 City of Puyallup WWTP 16

Figure 1: Total Recoverable Arsenic in Puya llup Wastewater Treatme nt Plant Effluent

Arsenic has been found in ambient river sa mples taken upstream of the Puyallup WWTP discharge. According to a 2002 Depa rtment of Ecology report titled Results and Recommendations from Monitoring Arsenic Leve ls in 303(d) Listed Rivers in Washington 2 , during low flows arsenic concentrations in the Puyallup River range from approximately 0.76 to over 1.5 ug/L (ppb). Ecology argues in the report against th e inclusion of the Puyallup River in a 303(d) list fo r arsenic due to the likelihood that the arsenic is naturallyoccurring. Table 5 below contains ambient arsenic data collected for the 2002 Ecology report. TABLE 5: Ambient Arseni c in the Puyallup River

Location Date Arsenic (ug/L) Temperature ( o C) Conductivity (umhos/cm) TSS (mg/L) Puyallup R. above Electron 9/26/2001 0.76 7.7 62 371

Puyallup R. above Carbon

River 9/26/2001 1.2 9.3 56 558

2 Ecology publication number 02-03-045, al so available online at (accessed 5/2009): http://www.ecy.wa.gov/biblio/0203045.htmlPermit No.: WA0037168 City of Puyallup WWTP 17 Carbon

River 9/26/2001 1.0 10.8 66 717

Puyallup R. above White River 9/26/2001 1.5 10.2 65 1000

White River 9/26/2001 1.3 13.0 112 92 Puyallup R. @ Meridian St. 9/26/2001 1.0 11.5 79 313

The potable water supply for the City of Puyallup is a series of groundwater wells and springs, as well as a tie-in with the City of Tacoma water su pply. The City of Tacoma obtains much of their water from the Green River. Recent water qua lity reports from the Cities of Puyallup and Tacoma detail the amount of arsenic in the potabl e water supply. The reports indicate that the maximum arsenic concentration in the Puyallup system was 6 ppb, and in Tacoma the maximum concentration was 7 ppb 3 . Neither system exceeds the federa l drinking water standard of 10 ppb. However, this information about the potable wate r supply could explain the source of arsenic in the Puyallup WWTP effluent. As described in the permit, the Permittee must conduct quarterly arsenic monitoring. The results will be used to determine if there is reasonabl e potential for inorganic arsenic to exceed the human health standard. 

### C Electronic Submission of Di scharge Monitoring Reports The draft permit requires that the permittee su bmit DMR data electronically using NetDMR within six months of the effective date of the pe rmit. NetDMR is a national web-based tool that allows DMR data to be submitted electronically via a secure Internet application. NetDMR allows participants to discontinue mailing in paper forms under 40 CFR 122.41 and 403.12. Under NetDMR, all reports required under the pe rmit are submitted to EPA as an electronic attachment to the DMR. Once a permittee begi ns submitting reports using NetDMR, it is no longer required to submit paper copies of DMRs or other reports to EPA or the Department of Ecology. Paper submissions to the Puyallup Tribe shall continue for the duration of the permit. The EPA currently conducts free training on the use of NetDMR. Further information about NetDMR, including upcoming trainings and cont acts, is provided on the following website: http://www.epa.gov/netdmr . The permittee may use NetDMR after requesting and receiving permission from EPA Region 10.

3 Puyallup water supply report for 2006 (accessed 5/2009): http://www.cityofpuyallup.org/files/library/5c171d6575f 6b030.pdf . Tacoma water supply report for 2007 (accessed 5/2009): http://www.mytpu.or g/files/library/2007-water-quality_002.pdf

.Permit No.: WA0037168 City of Puyallup WWTP 18



### D. Operation and Maintenance Plan Section 402 of the CWA and fede ral regulations 40 CFR 122.44(k)(2 ) and (3) authorize EPA to require best management pract ices, or BMPs, in NPDES permits. BMPs are measures for controlling the generation of pollutants and their release to wate rways. For municipal facilities, these measures are typically included in the f acility’s Operation & Maintenance (O&M) plan. These measures are important tools for wa ste minimization and pollution prevention. The draft permit requires the City of Puyallup to update existing or incorporate new BMPs as appropriate into their O&M plan within 180 days of permit issuance. Specifically, the City must consider spill pr evention and control, optimiza tion of chemical use, public education aimed at controlling the introducti on of household hazardous materials to the sewer system, and water conservation. To the ex tent that any of thes e issues have already been addressed, the City need only reference the appropriate document in its O&M plan. The O&M plan must be revised as new pract ices are developed. As part of proper operation and maintenance, the draft permit requires the City to develop a facility plan when the annual average flow exceeds 85% of th e average annual design flow of the plant (9.46 mgd). This plan requires the City to develop a strategy for re maining in compliance with effluent limits in the permit. 

### E. Additional Permit Provisions In addition to facility-specific requirements, Sec tions IV, V, and VI of the draft permit contain “boilerplate” requirements. Boile rplate is standard regulatory language that applies to all Permittees and must be included in NPDES permits. Because the boilerp late requirements are based on regulations, they cannot be challenged in the context of an NPDES permit action. The boilerplate covers requ irements such as monitoring, reco rding, and reporting requirements, compliance responsibilities, and general requirements.



### X. OTHER LEGAL REQUIREMENTS A. Endangered Species Act Section 7 of the Endangered Speci es Act requires federal agencies to consult with the National Marine Fisheries Service (NMFS) and the U.S. Fish and Wildlife Service (USFWS) to insure that any action authorized, funded, or carried out by such agency is not likely to jeopardize the continued existence of any endangered or threat ened species or result in the destruction or adverse modification of designated critical habitat. In order to begin the consultation process the EPA requested lists of threatened and endangered species that may be present in the project area in phone conversations with the NM FS and USFWS (hereafter referred to as the Services). In a phone call on March 26, 2009, Andrea LaTier w ith the USFWS identified bull trout ( Salvelinus confluentus ) as threatened and indicated that the bald eagle ( Haliaeetus leucocephalus ) had been delisted since preparation of the previous biological evaluation (BE). In a phone call on March 31, 2009, Dan Guy with NMFS identified Chinook salmon ( Oncorhynchus tshawytscha ) and Puget Sound steelhead trout ( O. mykiss ) as threatened species that would need to be considered in future BE’s for this discharge.Permit No.: WA0037168 City of Puyallup WWTP 19 The EPA submitted a BE to the Services for the bull trout, Chinook salmon, and steelhead along with a request for informal consultation on February 17, 2011 . The EPA determined that issuance of the NPDES permit was not likely to adversely affect the bu ll trout, Chinook salmon, or steelhead trout. Subsequent to this determination the EPA received letters of nonoccurrence from NMFS and USFWS on May 4, 2011and May 13, 2011, respectively. The Services requested additional information including an anal ysis of unregulated pharmaceuticals, PBDE’s, and other compounds including an analysis of e ffects on an additional species, the Southern Resident Killer Whale ( Orcinus orca ). After further consulta tion with the Services and discussions with the Puyallup Tribe of Indians, the EPA prepared a revised BE and requested formal consultation with th e Services on March 30, 2012. USFWS BO A biological opinion (BO) from the USFWS date d May 17, 2013 concluded that the issuance of the NPDES permit would result in incidental ta ke in the form of ha rassment of adult and subadult bull trout from the Puya llup River core area. The Serv ice concluded that take would result from the discharge of treated and disinf ected water causing degraded surface water quality. The BO stated the continuous source of ammoni a and dissolved metals create a plume within which bull trout are exposed to elevated temperature, unionized ammonia, dissolved zinc and dissolved copper. These degraded water quality conditi ons are a source of metabolic stress for exposed bull trout and are reasonably certain to significantly disrupt norm al bull trout behaviors (i.e. the ability to successfully feed, move, and shelter). The USFWS BO also stated that temperature is the most important abiotic factor influencing metabolic rate in fish. The BO also concluded that the level of anticipated take is not likely to result in jeopardy to bull trout. The following reasonable and prudent measures (RP Ms) were stipulated for the City of Puyallup in the BO as necessary and appropriate to minimize the impact of incidental take to bull trout: a) The City of Puyallup must provide an a nnual report to the Service by February 15 each year of the permit term (2012-2017). The annual report shall compile and summarize data and information from Di scharge Monitoring Reports submitted by the City of Puyallup, and sh all include the following: (i) A summary of maximum reported effl uent discharge concentrations. (ii) A summary of any reported e ffluent limit violations. (iii) A summary of any reported emergenc y and/or non-compliance events, including any instances when th e WWTP discharged under bypass or upset conditions. (iv) A summary of surface/receivi ng water monitoring data. (v) Results of annual Whole Effluent Toxicity testing. (vi) A summary of any significant revi sions to the facility operation and maintenance (O&M) plan. b) The City of Puyallup shall submit annual reports to the Washi ngton Fish and Wildlife Office in Lacey, Washington (Attn: Fede ral Activities Br anch, Division of Consultation and Conservation Planning).Permit No.: WA0037168 City of Puyallup WWTP 20 c) In substitute for any pa rt of the annual report, the City of Puyallup may instead choose to send an electronic (e-mail) notification directing our office to specific, relevant information which is available on-lin e (e.g., the EPA's Envirofacts web-site). Email notification shall be given once annually, on or around February 15 each year of the permit term (2012-2017), to the Fe deral Activities Bran ch, Division of Consultation and Conservation Planning. Please identify Reference No. 13410-2011­ F-0148. These RPMs are included in the permit. NMFS BO A BO from the NMFS dated December 14, 2012 determ ined that the effects of the proposed permit reissuance will harm ESA-listed fish by causing decreased fitn ess and disorientation, leading to increased predation risk. Therefore, in cidental take (in the fo rm of harm) of Puget Sound Chinook salmon and Puget Sound steelhead is reasonably certain to occur. NMFS also anticipates that the effects of the proposed permit will harm some ESA-listed fish due to sublethal effects as a result of exposure to low co ncentrations of contaminants and elevated temperatures. However, the BO al so concluded that the proposed action is not likely to jeopardize the continued existence of Puget Sound Chinook salmon and Puget Sound Steelhead, or destroy or adversely modi fy designated critical habitat for Puget Sound Chinook salmon. Finally, the NMFS BO c oncluded the reissuance of the permit may affect, but not likely adversely affect the S outhern Resident Killer Whale, the Humpback Whale ( Megaptera novaeangliae) and Steller sea lions ( Eumetopias jubatus ). The BO stated water temperature is a key factor influencing salmon survival. In a meeting between the Puyallup tribe, the USFWS, NMFS and the EPA it was agreed discharges must be characterized for temperat ure by continuous monitoring and a temperature monitoring plan. The permit require s continuous monitoring of temper ature in both the effluent and upstream of the discharge in the Puyall up River and a temperature monitoring plan. A second RPM is to require the City to pr ovide NMFS with annual monitoring reports of regulated discharge constituent concentrations at the outfall and rapidly inform NMFS of any exceedances of permit limits. The permit requires the same reporting requirement to NMFS as it does to the USFWS as stated above. 

### B. The Magnuson-Stevens Fishery C onservation and Management Act The Magnuson-Stevens Fishery Conservation and Management Act (January 21, 1999) (MSA) requires the EPA to consult with NOAA National Marine Fisheries Service when a proposed discharge has the potential to adversely affect (reduce quality and/or quantity of) Essential Fish Habitat. Essential fish habitat (EFH) includes the waters and substrate (sediments, etc.) necessary for fish to spawn, breed, feed or grow to matur ity. The EFH regulations define an adverse effect as any impact which reduces quality or qua ntity of EFH and may include direct (e.g. contamination or physical disruption), indirect (e .g. loss of prey, reduction in species’ fecundity), site specific, or habitat-wide impacts, incl uding individual, cumula tive, or synergistic consequences of actions. Based on information provided in the BE and th e analysis of effects presented in the ESA portion of the BO, the NMFS BO concluded that the proposed action will result in long­Permit No.: WA0037168 City of Puyallup WWTP 21 term degradation of EFH. NMFS concluded, “Effects from elevated temperature and contaminants would occur in the Puyallup Rive r, affecting water column EFH for the life of the structure. Decreased water quality woul d be found in the mixing zone, covering an area approximately 400 feet in length and 50 f eet in width throughout the water column, or roughly 0.5 acres, reducing rearing, foraging, and spawning success of pink, Chinook, and Coho salmon”. Section 305(b) of the MSA requires NMFS to r ecommend measures that may be taken by the action agency to conserve EFH. 

### C. Certification Section 401 of the CWA requires EPA to seek ce rtification from the Trib e that the permit is adequate to meet Tribal water quality standards before issuing a final permit. The regulations allow for the Tribe to stipulate more stringent co nditions in the permit, if the certification cites the CWA or Tribal law provisi ons upon which that condition is based. In addition, the regulations (40 CFR 124.53(e)(3)) re quire a certification to include statements of the extent to which each condition of the permit can be made le ss stringent without violating the requirements of Tribal law. Part of the Tribe’s certificat ion is authorization of a mixing zone. The draft permit contains a mixing zone based on the provisi ons in the Puyallup Water Quality Standards. If the Tribe authorizes a differe nt mixing zone in its final certification, EPA will recalculate the effluent limitations based on the dilution available in the final mixing zone. If the Tribe does not certify the mixing zone, EPA will recalculate the permit limitations based on meeting water quality standards at the point of discharge. The Tribe stipulat ed conditions of the draft permit and fact sheet as part of the pr e-certification. A copy of the Tr ibe’s pre-certification is provided in Appendix F. 

### D. Permit Expiration This permit will expire five years from the effective date

.

REFERENCES City of Puyallup, 1995. Final Effluent Ammonia, Copper and Mercury Evaluation. May 1995. EPA 1991. Technical Support Document for Wate r Quality-based Toxics Control Office of Water Enforcement and Permits, Office of Water Regulations and Standards. Washington, D.C., March 1991. EPA/505/2-90-001. Gray and Osborne, 1996. City of Puyallup Wastewater Facility Plan. June 1996. Washington State Department of Ecology, 1993. Puyallup River Total Maximum Daily Load for Biochemical Oxygen Demand, Am monia, and Residual Chlorine. June 1993. Washington State Department of Ecology, 1994 . Addendum to the 1993 Puyallup River TMDL Report. July 1994. EPA 1999. Update of Ambient Water Quality Criteria for Ammonia. Office of Water. Washington, D.C., December 1999. EPA-822-R-99-014.Permit No.: WA0037168 City of Puyallup WWTP 22 U S Department of Interior, Fish and Wildlife Service, Biological Opinion, City of Puyallup Wastewater Treatment Plant, NPDES Permit Reissuance . May 17, 2013. Reference: 13410­ 2011-F-0148, US Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Endangered Species Act (ESA) Secti on 7(a)(2) Biological Opinion and Magnuson-Stevens Fishery Conservation and Management Act Essential Fish Habitat (EFH) Consultation City of Puyallup Wastewater Nati onal Pollution Discharge Elimination System Reissuance. Pierce County, Washington State. December 14, 2012, NMFS Consultation Number: 2012/01103Permit No.: WA0037168 City of Puyallup WWTP 23 APPENDIX A – CITY OF PUYALLUP FACILITY LOCATION

Outfall LocationPermit No.: WA0037168 City of Puyallup WWTP 24
Figure A-1: Puyallup Wastewater Tr eatment Facility Outfall Location

City of Puyallup WWTP Outfall Location

Figure A-2: Puyallup Wastewater Tr eatment Facility Aerial Photo The Puyallup Wastewater Treatmen t Plant (WWTP) discharges to the Puyallup River (latitude 47 O 12' 26" N, longitude 122 O 19' 11" W) located within the 1873 survey area of the Puyallup Reservation. The discharge point is marked on Figures A-1 and A-2 above.Permit No.: WA0037168 City of Puyallup WWTP 25 APPENDIX B – CITY OF PUYALLUP WASTE STREAMS AND TREATMENT PROCESSES Effluent Characterization In determining the pollutants present in the di scharge and their maximum concentrations, EPA considered the City’s NPDES application, discha rge monitoring reports, and priority pollutant scans (collected as part of the City’s pretreatment requirements ). Table B-1 lists the maximum concentration of pollutants reported by the City as being detected in its discharge. The toxic and conventional pollutant categories are defi ned in the regulations (40 CFR 401.15 and 401.16, respectively). The category of nonconventional po llutants includes all pollutants not included in either of the other categories. Table B-1: Pollutants Detected in Discharge (2003 to 2011) Pollutant Type Parameter Maximum Reported Concentration Conventional 1 BOD5, monthly average 8.97 mg/L TSS, monthly average 12.41 mg/L pH, min - max 6.3 - 7.6 s.u. Fecal Coliform Bacteria, monthly average 57 /100 mL

Toxic 2,3 Arsenic, daily maximum 1.38 ug/L Cadmium, daily maximum 0.18 ug/L Chromium, daily maximum 2.70 ug/L

Copper 1 , daily maximum 20.9 ug/L Endosulfan II, daily maximum 0.05 ug/L Lead 1 , daily maximum 1.00 ug/L Mercury 1 , daily maximum 0.02 ug/L

Nickel, daily maximum 3.00 ug/L Selenium, daily maximum 1.10 ug/L

Silver, daily maximum 0.30 ug/L Toluene-d8, daily maximum 97 ug/LPermit No.: WA0037168 City of Puyallup WWTP 26 Zinc 1 , daily maximum 72.04 ug/L Non-conventional 1 Ammonia, daily maximum Ammonia, max unionized 9.25 mg/L 93 ug/L Temperature 23.60 o C (summer) 18.40 o C (winter) Notes: 1. Values determined from monthly discharge monitoring reports submitted to EPA (2003-2011). 2. Values determined from Permittee electr onic submittal following initial paper permit application. 3. Metals concentrations are reported as total recoverable metals. 4. Maximum concentrations do no t include statistical outliers. 5. Unionized ammonia estimated at less than 1% of total ammonia. Treatment Processes Preliminary treatment:

- Solids removal (fine screen)

- Dewatering and landfilling removed solids Primary treatment:

- Primary Clarification

- Sludge / grit centrifugal separation

- Grit disposal to landfill Secondary treatment:

- Activated Sludge

- Secondary Clarification

- UV Disinfection Final Discharge:

- Design Flow (Maximum Month) - 13.98 mgd

- Max Monthly Average Flow - 8.81 mgd (DMR data 2003-2010)

- Average Annual Flow - 4.06 mgd (DMR data 2003-2010) Biosolids (sludge) handling:

- Anaerobic digestion

- Belt filter press

- Hauling by private contractor for land applicationPermit No.: WA0037168 City of Puyallup WWTP 27 APPENDIX C – BASIS FOR EFFLUENT LIMITATIONS I. Statutory and Regulatory Basis for Limits Sections 101, 301(b), 304, 308, 401, 402, and 405 of the Clean Water Act (CWA) provide the basis for the effluent limitations and other cond itions in the draft permit. The EPA evaluates discharges with respect to thes e sections of the CWA and the relevant NPDES regulations to determine which conditions to include in the draft permit. In general, the EPA first determines which techno logy-based limits must be incorporated into the permit. EPA then evaluates the effluent quality exp ected to result from these controls, to see if it could result in any exceedences of the water quality standards in th e receiving water. If exceedences could occur, EPA must include water quality-based limits in the permit. The draft permit limits reflect whichever requirements (tec hnology-based or water quality-based) are more stringent. A table of the limits that EPA is pr oposing in the draft permit is found in section V of this fact sheet. This Appendix describes the technology-based and water quality-based evaluations for the C ity of Puyallup WWTP. II. Technology-ba sed Evaluation The 1972 CWA required publicly ow ned treatment works (POTWs) to meet performance-based requirements based on available wastewater tr eatment technology. Under Section 301(b)(1)(B) of the CWA, EPA was required to develop a pe rformance level referred to as “secondary treatment” for POTWs. Based on this statutory requireme nt, EPA developed secondary tr eatment regulations which are specified in 40 CFR Part 133.102. Th ese technology-based regulati ons apply to all municipal wastewater treatment plants and identify the mi nimum level of effluent quality attainable by secondary treatment in terms of five-day bi ochemical oxygen demand (BOD5), total suspended solids (TSS), and pH. Section IV of this Appendix discusses the details of the evaluation for each of these pollutants. III. Water Quality-based Evaluation In addition to the technology-based limits di scussed above, EPA evaluated the discharge to determine compliance with Section 301(b)(1)(C ) of the CWA. This section requires the establishment of limitations in permits necessary to meet water quality standards by July 1, 1977. The regulations at 40 CFR 122.44(d)(1) implement section 301(b)(1)(C) of the CWA. These regulations require that NPDES pe rmits include limits for all pollutants or parameters which “are or may be discharged at a level which will cause , have the reasonable potential to cause, or contribute to an excursion above any State water quality stan dard, including State narrative criteria for water quality.” These regulations also apply to Tribal water quality standards. The limits must be stringent enough to ensure that water quality standards are met, and must be consistent with any availabl e wasteload allocation (WLA). In determining whether water quality-based limits are needed and developing those limits when necessary, EPA uses the approach outlined below:

a. Determine the appropriate water quality criteria b. Determine whether there is “reasona ble potential” to exceed the criteriaPermit No.: WA0037168 City of Puyallup WWTP 28

c. If there is “reasonable potential”, develop a WLA d. Develop effluent limitations based on the WLA Appendix D provides example calculations to i llustrate how these steps are implemented. A. Determine Water Quality Criteria The first step in developing water quality-based limits is to determine the applicable water quality criteria. The applicable criteria are determined based on the beneficial uses of the receiving water as identified in section III of the Fact Sheet. For any gi ven pollutant, different uses may have different criteria. To protect all beneficial uses, the permit limits are based on the most stringent of the water quality criteria applicable to those uses. B. Reasonable Pote ntial Evaluation To determine if there is “reasonable potential” to cause or contribute to an exceedence of the water quality criteria for a given pollutant, EPA comp ares applicable water quality criteria to the maximum projected downstream concentrations fo r a particular pollutant , Cd. If the projected downstream concentration exceeds the criteria, there is “reasonable potential” and a water quality-based effluent limit must be included in the permit. EPA used the recommendations in Chapter 3 of the Technical Support Document for Water Quality-based Toxics Control (TSD) to conduct this “reasonable potential” analysis for the City of Puyallup WWTP. The maximum projected downstream concentrati on, Cd, is determined using the following mass balance equation. Cd = (Ce x Qe) + (Cu x Qu) Qd where, Cd = receiving water concentration downstream of the effluent discharge (at the edge of the mixing zone) Ce = maximum projected e ffluent concentration Qe = design flow Cu = upstream concentration of pollutant Qu = upstream flow Qd = receiving water flow downstream of the effluent discharge = Qe + Qu Substituting the equality: D = (Qu + Qe) / Qe where, D = dilution factor the equation becomes: Cd = ((Ce - Cu) / D) + CuPermit No.: WA0037168 City of Puyallup WWTP 29 For most of the metals of concern, the aquatic life water quality criteria are expressed as dissolved. Effluent concentratio ns are expressed as total recove rable metals. The dissolved metal is the concentration of an analyte that will pa ss through a 0.45 micron filter. Total metal is the concentration of an analyte in an unfiltered sa mple. To account for the differences between total effluent concentrations and dissolved criteria, “t ranslators” are used in the reasonable potential (and permit limit derivation) equations. Additional discussion on the translators is provided in Section IV of this appendix. Pollutant Specific An alysis of this appendi x. In order to compare metals with criteria expressed as dissolved, the downstream concentration must be converted to the dissolved fraction via the translator. Cd (dissolved) = Cd (total) * translator Paragraphs 1 through 3 below discuss each of the factors used in the mass balance equation to calculate Cd. 1. Effluent Concentration The maximum projected effluent concentration (Ce) in the mass balance equation is based on the 99th percentile, calculated using the statisti cal approach recommended in the TSD. The calculation incorporates a “reasonable potential multiplier” which accounts for uncertainty in the data. The multiplier decreases as the number of data points increases and variability of the data decreases. Variability is measured by the coeffici ent of variation (CV) of the data. When there are not enough data to reliabl y determine a CV, the TSD recommends using 0.6 as a default value. A partial listing of reasonable potential multipliers can be found in Table 3-1 of the TSD. Maximum reported effluent con centrations, CVs, and RPMs used in the reasonable potential calculations were based on data collected by the City (DMR data and other monitoring) since August 2003. 2. Upstream (Ambient) Concentration The ambient concentration in the mass balance equation is based on a reasonable worst-case estimate of the pollutant concentration upstream from the City of Puyallup’s discharge. For criteria that are expressed as maxima (for example, copper, ammonia), Ecology guidance (Publication Number 92-109) allows for the use of the 90th percentile of critical period ambient data as a conservative estimate. For criteria that are expressed as minima (for example, dissolved oxygen) the 10 th percentile can be used. These percentile s were calculated based on data obtained from Ecology’s River and Stream Water Qua lity Monitoring Program (Station 10A070). Because of changes to collection and analytical methods, metals data collected prior to May 1994 were not included in the evaluation. 3. Dilution Under the Tribe’s water quality standards, dischargers are not authorized to use the entire upstream flow for dilution of their effluent. Instead, the standards contain the following restrictions on mixing zones for determining compliance with chronic criteria:Permit No.: WA0037168 City of Puyallup WWTP 30 The size may be up to 300 feet plus the dept h of water over the di scharge ports, 100 feet upstream, and 25 percent of the width of the river at the 7Q10 4 flow; The mixing zone may not be more than 25 percent of the volume of the 7Q10 flow. The Tribe’s water quality standard s require that the acute mixing zone be the same width and 10 percent of the length of the chr onic mixing zone. In addition, the acute mixing zone is limited to 10 percent of the volume of the chronic mi xing zone, or 2.5 percent of the 7Q10 flow. The Puyallup mixing zone is depicted belo w with the maximum dimensions allowed by applicable water quality standa rds. The horizontal le ngth of the diffuser according to the 2007 Outfall Inspection Report is 50 feet. The river is about 207 ft wide duri ng low flows according to a 1995 Cosmopolitan Engineering dilution memo (25% of 207 ft is about 52 ft for the upper bound of the mixing zone width).

Chronic Zone

Acute Zone50ft 300 ft 100 ft

10 ft 30 ft Puyallup River Flow Direction

NOTES: Drawing not to scale. The river is approximately 207 ft wide during low flows (1995 Cosmopolitan Engineering Memo). The existing diffuser is approximately 50 ft in length (2007 Outfall Inspection Report). Figure C-1: Mixing Zone The 1996 Facility Plan for the treatment plant (Gray and Osbor ne, 1996) provided the dilution factors under these conditions. Thes e factors, which were used in calculating the water-quality based effluent limits, are summarized in Table C-1.

4 The 7Q10 (7-day, 10-year low flow) is the 7-day average low flow that has a 10 percent chance of occurring in any given year. The 7Q10 was calc ulated based on the Log Pearson Type III distribution using United States Geological Survey (USGS) data . According to the 1996 Facility Plan, the 7Q10 flow for the Puyallup River is 757 cubic feet per second (cfs).Permit No.: WA0037168 City of Puyallup WWTP 31 Table C-1: Dilution Factors at Critical Mixing Conditions Mixing Zone Dilution Factor River flow Conditions Percent of River Flow Available

for Effluent Mixing Effluent Flow (mgd) 1

Acute aquatic life 1.9 7Q10 (757 cfs) 2.5% 14.1 Chronic aquatic life 13.6 7Q10 (757 cfs) 25% 9.7

Notes: 1. This effluent flow estimate does not include the former Microchip flow allocation due to their cessation of operations, the expiration of their perm it, and the complete closure of the associated permit file at the request of the new facility owners. The acute effluent flow for Puyallup was determined by subtracting 1.88 mgd from 16 mgd (t he effluent flow assumption used in the previous dilution model per the facility plan ). Similarly, the chronic flow was obtained by subtracting 1.88 mgd from 11.6 mgd. In accordance with the Puyallup Tribe’s water qu ality standards, only the Tribe may authorize mixing zones. In its pre-certificat ion, the Tribe authorized a mixi ng zone for metals (copper), pH, and ammonia. The mixing zone was contingent on monitoring of the receiving water that demonstrated attainment of wate r quality criteria for these parame ters. The Tribe has agreed to a reduction of the receiving water monitoring frequency, now calling for ambient monitoring once per permit cycle. If the Tribe authorizes a different sized mixing zone in its final 401 certification, EPA will recalculate the reasonabl e potential and effluent limits based on the revised mixing zone. If the Tribe does not author ize a mixing zone in its 401 certification, EPA will recalculate the limits based on meeting water quality criteria at the point of discharge. After Cd is determined, it is compared to the applicable wa ter quality criterion. If it is greater than the criterion, there is “reasonable potential” and a wa ter quality-based effluent limit is developed for that parameter. Table D-1 summarizes the “reas onable potential” calculations for the Puyallup WWTP discharge. When all effluent data for a particular pollutant were below the detection limit (e.g. toluene), EPA assumed that there was no reasonable potential. C. Wasteload Allocation Development Once EPA has determined that a water quality-based limit is required for a pollutant, the first step in developing a permit limit is developm ent of a wasteload allocation (WLA) for the pollutant. A WLA is the concentration (or load ing) of a pollutant that the Permittee may discharge without causing or contributing to an exceedence of water quality standards in the receiving water. WLAs for this permit were determined in three ways: based on a mixing zone for parameters such as pH and copper; based on a WLA established as part of a preventative TMDL such as for ammonia; and based on meeti ng water quality criteria at “end-of-pipe” for fecal coliform.Permit No.: WA0037168 City of Puyallup WWTP 32 1. Mixing zone-based WLA Where the Tribe authorizes a mixing zone for the discharge, the WLA is calculated as a mass balance, based on the available dilution, backgro und concentrations of th e pollutant(s), and the water quality criteria. The mass balance equation is the same as that used to calculate reasonable potential, with the acute or chronic criterion substituted for Cd and the WLA substituted for Ce. Because acute aquatic life, chroni c aquatic life, and human health criteria apply over different time frames and may have different mixing zones, it is not possible to compare them directly to determine which criterion results in more stri ngent limits. For example, the acute criteria are applied as a one-hour average and have a smalle r mixing zone, while the chronic criteria are applied as a four-day average and have a larger mixing zone. To allow for comparison, the acute, chronic, and human health WLAs are statistically converted to long-term average WLAs. The most stringent long-term average WLA resulting from these conversions is used to calculate the permit limits. 2. TMDL-based WLA Where the receiving water quality does not meet water quality standards, the WLA is generally based on a TMDL developed by the state or EPA. A TMDL is a determination of the amount of a pollutant, from point, nonpoint, and natural backgr ound sources, including a margin of safety that may be discharged to a water body without causing the water body to exceed the criterion for that pollutant. Any loading above this capacit y would violate water quality standards. Section 303(d) of the CWA requires states to develop TM DLs for waterbodies that will not meet water quality standards after the imposition of technol ogy-based effluent limitations, to ensure that these waters will come into compliance with water quality standards. The first step in establishing a TMDL is to determine the assimilative capacity (the loading of pollutant that a water body can assimilate w ithout exceeding water quality standards), accounting for seasonal variation, if appropriate. The next st ep is to divide the assimilative capacity into allocations for non-point sources (called load allo cations), point sources (called WLAs), natural background loadings, and a margin of safety to account for any uncertain ties. Permit limitations are then developed for point sources that are consistent with the WLAs. Ecology established a seasonal preventative TMDL for ammonia and BOD5 for the Puyallup River basin and tributaries e ffective May 1 through Octobe r 31 (Ecology, 1993 and 1994). The terms of this preventative TMDL were used in establishing limits for BOD5 and ammonia in the draft permit (see Sections IV.A and IV.D of Appendix C). 3. “End-of-Pipe” WLA In some cases, there is no dilution available. Fo r example, the Tribe may decide not to authorize a mixing zone for a particular pollutant, or th e receiving water may exceed the criterion for a particular pollutant, leaving no “clean” upstream water available for dilu tion. When there is no dilution, the criteri on becomes the WLA. D. Permit Limit Derivation Once the WLA has been developed, EPA applies th e statistical permit limit derivation approach described in Chapter 5 of the TSD to obtain daily maximum and monthly average permit limits. This approach takes into account effluent variability (through the CV), sampling frequency, and the difference in time frames between the monthly average and daily maximum limits.Permit No.: WA0037168 City of Puyallup WWTP 33 The daily maximum limit is based on the CV of the data and the probability basis, while the monthly average limit is dependent on these two variables and the monitoring frequency. As recommended in the TSD, EPA used a probability basis of 95 percent for monthly average limit calculation and 99 percent for the daily maxi mum limit calculation. As with the reasonable potential calculation, when there were not enough data to calculate a CV, EPA assumed a CV of 0.6 for both monthly average and daily maximum calculations. Where limits were necessary for specific pollutants, the CVs in Table D-1 were used. Appendix D provides an example permit limit calculation. E. Antidegradation In addition to water quality-based limitations fo r pollutants that could cause or contribute to exceedences of numeric or narrative criteria, EP A must consider the Tribe’s antidegradation policy. This policy is designed to protect existing water quality when the existing quality is better than that required to meet the standard and to prevent water quality from being degraded below the standard when existing quality just meets the standard. For waters that are at the leve l of the standard (known as “Tie r 1" waters), the antidegradation policy requires that water quality standards continue to be met. For waters with better quality than the standards (known as “high quality” or “T ier 2" waters), antidegr adation requires that no lowering of water quality be allowed unless the Tr ibe finds that allowing lower water quality is necessary to accommodate important economic or social development before any lowering of water quality is authorized. The Tribe may also designate waters as “Tier 3," in which case no lowering of water quality is allowed. The Tr ibe has no implementation guidance for their antidegradation policy. Therefore, th e Puyallup River in the vicinity of the City's discharge has not been assigned to any tier. However, the limits in the permit ensure that uses are protected and water quality standards are met. IV. Pollutant-specific Analysis This section outlines the basis for each of the effl uent limitations in the City of Puyallup’s draft permit. A. Biochemical Oxygen Demand The federal regulations at 40 CFR 133.102(a)(1)-(3) specify technol ogy-based requirements for BOD5 for POTWs. These requirements are based on the effluent quality attainable by secondary treatment and are equal to the following: Monthly Average Concentration: 30 mg/L Weekly Average Concentration: 45 mg/L Monthly Average Percent Removal: 85% Minimum The technology-based concentration and percent rem oval limits have been incorporated into the draft permit for BOD5. Under 40 CFR 122.45(f), permits must contain mass-based limitations. The concentration requirements may be converted to mass limits by multiplying the technology-based concentrations times the design flow (13.98 mgd) and a conversion factor of 8.34. The resultingPermit No.: WA0037168 City of Puyallup WWTP 34 monthly and weekly average loadings are 3,498 lbs/day and 5,247 lbs/da y respectively. These loading limits are less stringent than water qua lity-based BOD5 loading limits. Therefore, loading limits in the draft permit are water quality-based. Ecology developed a preventative TMDL for B OD5 and ammonia throughout the Puyallup River basin and tributaries effective May 1 thr ough October 31 (Ecology, 1993 and 1994). The TMDL also provides an option for dischargers to redu ce the WLA for ammonia in order to increase the WLA for BOD5, since both parameters together influence dissolved oxygen. For each pound of ammonia reduction, the WLA for B OD5 may increase by 13.4 lb/da y. The net effect of this exchange in the allocation is considered negligible. The BOD5 TMDL WLA is appl ied only during the critical season (May - October). The recommended Waste Load Allocations (W LAs) for BOD5 and ammonia from May - October given in the preventative TMDL for the Puyallup WWTP are: BOD5: 2,085 lbs/day maximum weekly average Ammonia: 880 lbs/day maximum daily load In their comments on the previous draft permit, the City of Puyallup re quested the following BOD5 loading limits: Average monthly = 2,179 lbs/day Average weekly = 3,268 lbs/day The requested increase in the BOD5 average we ekly WLA is equal to 1,183 lbs/day, i.e.: 3,268 - 2,085 = 1,183 lbs/day. With the increase in the aver age weekly BOD5 loading limit, the average monthly BOD5 loading limit increases to 2,179 lbs/day, based on an average weekly:average monthly factor of 1.5 (i.e. 3,268 ÷ 1.5 = 2,179 lbs/ day.) The revised average monthly BOD5 loading limit corresponds to 85% re moval of the BOD5 loading de sign criteria for the treatment plant (of 14,525 lbs/day), i.e. 14,525 x 0.15 = 2,179 lbs/ day. The basis for the requested trade may be seen in the influent BOD5 loading cr iterion for the treatment plant, which is 14,525 lbs/day. Assuming 85% removal, the average m onthly mass-based effluent limit for BOD5 is 2,179 lbs/day (i.e. 14,525 x 0.15 = 2,179 lbs/day). Assu ming an average weekly:average monthly ratio of 1.5, the resulting average weekly mass-ba sed effluent limit is 3,268 lbs/day. These limits are more stringent than mass-based limits calculate d from the effluent concentration limits and the facility design flow (of 13.98 MGD). Table C-2 outlines the BOD5 limits in the draft permit. The draft limits are the same as the limits in the previous permit. Table C-2: BOD5 Draft Limits Concentration (mg/L) Loading (lb/day) Minimum Percent Removal (%) Average Monthly 30 2,179 85 Average Weekly 45 3,268

--Permit No.: WA0037168 City of Puyallup WWTP 35 B. Total Suspended Solids The federal regulations at 40 CFR 133.102(a)(1)-(3) specify technol ogy-based requirements for TSS for POTWs. These requirements are based on the effluent quality attainable by secondary treatment and are equal to the following: Monthly Average Concentration: 30 mg/L Weekly Average Concentration: 45 mg/L Monthly Average Percent Removal: 85% Minimum These technology-based concentration and percent removal limits have been incorporated into the TSS draft permit limits. The concentration requirements may be converted to mass limits by multiplying the concentrations times the design flow (13.98 mgd) and a conversion factor of 8.34. The resulting monthly and weekly average loadings are 3,498 lbs/day and 5,247 lb s/day respectively. However, the previous permit established the TSS mass-based limits on 85% removal of the TSS design load. The TSS design lo ading of the upgraded treatm ent plant is 15,550 lbs/day. Assuming 85 percent removal of the influent TSS, and applying a 1.5 factor to convert from the maximum monthly loading to the maximum week ly loading, results in the following TSS massbased limits: Maximum Monthly Average 2,333 lbs/day Maximum Weekly Average 3,499 lbs/day These limits have been incorporated into the dr aft permit. Table C-3 outlines the TSS limits in the draft permit. Table C-3: TSS Draft Limits Concentration (mg/L) Loading (lb/day) Minimum Percent Removal (%) Average Monthly 30 2,333 85 Average Weekly 45 3,499

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C. Fecal Coliform Bacteria The Puyallup Tribe’s water quality standards stat e that the geometric m ean of fecal coliform bacteria may not exceed 100 colonies/100 ml and no more than 10 percent of the samples used to calculate the mean may exceed 200 colonies/100 ml. Fecal coliform counts in the Puyallup River upstream of the City’s discharge someti mes exceed these criteria. When the upstream water quality exceeds the criteria, there is no “clean” water to mix with the discharge to enable the water to meet the criterion downstream. As a re sult, the discharge must meet the criteria at the point of discharge. The criteria have been incorporated directly into the draft permit as aPermit No.: WA0037168 City of Puyallup WWTP 36 monthly average limit and a requirement that no more than 10 percent of samples exceed 200/100 ml. D. Ammonia Low concentrations of ammonia can be toxic to freshwater fish, particularly salmonids. Unionized ammonia (NH3) is the prin cipal toxic form of ammonia. The ammonium ion (NH4+) is much less toxic. The relative percentages of these two forms of ammonia in the water vary as th e temperature and pH vary. As th e pH and temperature increase, the percentage of ammonia that is in the un-ionized form increas es, causing increased toxicity. Because the toxicity of ammonia is dependent upon pH and temp erature, the criteria are also pH and temperature dependent (EPA, 1999). In keeping with the previous permit, seasonal criteria and concentration limits were developed for am monia. The receiving water pH and temperature and corresponding ammonia criteri a are presented in Table C-4. Data for the Puyallup River were from Ecology’s River and Stream Water Quality Monitoring Program (Station 10A070) and data collected as part of the TMDL re port (Ecology, 1993). Reasonable worst-case pH and temperature conditions were calculated from the 90 th percentile of samples obtained from 1990 through 2007. Although earlier data exist for the monitoring location (from 1960 to 1981), previous analysis of the data indicated that the pH conditions of the river have changed. Therefore, to represent the existing river conditio ns to which the treatment plant discharges, only the more recent years of data were used. Table C-4: Unionized Ammonia Criteria

Time Period Receiving Water Conditions 1 Acute Criteria (mg/L) Chronic Criteria (mg/L) pH Temperature (°C) November 1 – April 30 7.67 9.0 0.085 0.019 May 1 – October 31 7.70 15.9 0.140 0.031
Note: 1. Based on the 90th percentile of the receiving water data co llected from 1990 to 2007. Criteria were determined using the Puyallup Tribe’s water quality standards. Although it is the un-ionized form that is toxic, th e criteria are expressed as total ammonia. As effluent mixes with receiving water, the temp erature and pH change, making it difficult to predict how much of the total ammonia in the discharge will convert to the un-ionized form. Therefore, the limits in the draft permit are expr essed as total ammonia, not un-ionized ammonia. Using the statistical permit de rivation method in the TSD, EP A calculated seasonal daily maximum and monthly average concentration li mits. Mass-based loadin gs corresponding to these limits were calculated based on the design flow of 13.98 mgd. In addition to potential toxicity, ammonia can contribute to dissolv ed oxygen depression. Ecology developed a preventative TMDL for a mmonia and BOD5 to address dissolved oxygenPermit No.: WA0037168 City of Puyallup WWTP 37 concerns in the Puyallup River. The preventativ e TMDL established a WLA for ammonia for the City’s WWTP (880 lb/day) and allowed conversion of ammonia loading into BOD5. Recall that the requested increase in the BOD5 average w eekly WLA was equal to 1,183 lbs/day, and that for each pound of ammonia reduction the WLA for BOD5 was allowed to increase by 13.4 lb/day. Based on the conditions of the preventative TMDL then, the ammonia maximum daily WLA decreases to 792 lbs/day, i.e.: 880 - (1,183 ÷ 13.4) = 792 lbs/day. This decreased loading was set as the effluent limit for ammonia from May 1 through October 31. This limitation was also used in the previous permit. Table C-5 summarizes the ammonia limitations in the draft permit. Table C-5: Total Ammonia Limits Daily Maximum Monthly Average Time Period Concentration (mg/L) Loading (lb/day) Concentration (mg/L) Loading (lb/day)

November 1 – April 30 1 16.1 2,622 5.4 793 May 1 – October 31 2 12.0 792 4.2 490

Notes: 1. Water quality-based effluent lim its (see Table D-1 in Appendix D). 2. MDL loading limit based on preventative TMDL. E. Metals In the Puyallup Tribe’s water qual ity standards, the most stringent criteria applicable to the permit for metals other than arsenic are the criteria for the protection of aqua tic life. For arsenic, the most stringent criterion is for protection of human health. This section discusses the calculation of the metals criteria and the conversion of these criteria to limits in the draft permit. 1. Criteria calculation In evaluating whether limits for specific metals we re appropriate and in calculating the necessary limits, EPA considered only metals that were det ected in the effluent. Ta ble C-6 lists the most stringent criteria for the metals of concern. Except for mercury, the Tribe's aquatic life criteria for these metals are expressed as a function of hardness, measured in milligrams per liter calcium carbonate (mg/L CaCO3). As the hardness of th e receiving water increases, the toxicity decreases, and the numerical value of the criteria increases. The hardness-dependent metals cr iteria were calculated based on the combination of historical receiving water hardness and e ffluent hardness data. The same hardness values used in the previous permit cycle were used to calculate effl uent limits for the new permit. A hardness value of 43.5 mg/L as CaCO3 was used as the projected hardness at the edge of the acute mixing zone. A hardness value of 25.50 mg/L CaCO3 was used as the projected hardness at the edge of the chronic mixing zone. Receiving water hardness data is provided in Appendix E.Permit No.: WA0037168 City of Puyallup WWTP 38 In addition to the calculation for hardness, the Tribe’s criteria include a “conversion factor” to convert from total recoverable to dissolved criter ia. Total recoverable metals analysis measures both the particulate and the disso lved fraction of the metal. Conversion factors address the relationship between the total amount of metal in the water column (total recoverable metal) and the fraction of that metal that causes toxic ity (bioavailable metal) . Conversion factors are included in Table C-6. Table C-6: Metals Criteria for the Puyallup River

Parameter C onvers i on Factor Criterion Formula C r it er i on ( ug /L) Dissolved Total Cadmium Acute Chronic 0.865 0.865 exp(1.128*(ln[hardness]) - 3.828) exp(0.7852*(ln[hardness]) - 3.49) 1.33 0.34 - -

- - Chromium Acute Chronic - -

- - exp(0.8190*ln[hardness] + 3.688) exp(0.8190*ln[hardness] + 1.561) 878.21 67.59 - -

- - Copper Acute Chronic 0.862 0.862 exp(0.9422*ln[hardness] - 1.464) exp(0.8545*ln[hardness] - 1.465) 6.97 3.17 - -

- - Lead Acute Chronic 0.687 0.687 exp(1.273*ln[hardness] - 1.460) exp(1.273*ln[hardness] - 4.705) 19.44 0.38 - -

- - Mercury Acute Chronic N/A 1 N/A 1 N/A 1 N/A 1 - -

- - 2.4 0.012 Nickel Acute Chronic 0.950 0.950 exp(0.8460*ln[hardness] + 3.3612) exp(0.8460*ln[hardness] + 1.1645) 666.25 47.14 - -

- - Selenium Acute Chronic - -

- - 20.0 5.0 20.0 5.0 - -

- - Silver Acute Chronic 0.531

- - exp(1.72*ln[hardness] - 6.52)

- - 0.5149

- - - -

- - Zinc Acute Chronic 0.891 0.891 exp(0.8473*ln[hardness] + 0.8604) exp(0.8473*ln[hardness] + 0.7614) 51.50 29.67 - -

- - 1 The acute and chronic criteria for mercury are not hardness-dependent. Hardness, from RTCs last permit cycle (mg/L, CaCO 3 ): 43.5 25.50 acute chronic Based on data submitted by the City, the reasona ble potential analysis indicated that copper shows reasonable potential to contribute to excurs ions above criteria at the edge of the chronic mixing zone and the acute mixing zone. Therefore, the draft permit contains limits for this metal. The 2003 permit included mercury limits of 0.052 ug/L (average m onthly) and 0.069 ug/L (maximum daily). The faci lity remained in compliance with these levels during the most recent permit cycle. A reasonable potentia l evaluation was conducted using recent data provided by the City. The evaluation indicated that mercury in the effluent does not have a reasonable potential to exceed the applicable water qua lity criteria. A similar situation exists for lead and zinc. In such cases, new effluent limits t ypically reflect the effl uent limits established in the previous permit to avoid backsliding. Howeve r, there were questions about the validity of some of the metals data upon which the prior metals limits we re based. EPA determined that there is now a sufficiently large data set obtained using clean sampling methods upon which to base reasonable potential without having to use the questionable data. The results of the current reasonable potential calculations are cons equently being used to set e ffluent limits. These changes are consistent with language in Clean Water Act section 303(d)(4)(B) regarding the revision of certain effluent limits. 2. Permit Limit Calculation Although the metals criteria are based on dissolved metal, 40 CFR 122.45(c) requires that metal limits be based on total recoverable metals. Cha nges in water chemistry as the effluent and receiving water mix could cause some of the part iculate metal in the effluent to dissolve. ToPermit No.: WA0037168 City of Puyallup WWTP 39 account for the difference between total recoverable effluent concentrations and dissolved criteria, “translators” are used in calculating effluent limits. “Translators” are based on the fraction of the total recoverable metals that is predicted to be in the dissolved form in the receiving water. The dissolved wasteload allocati on is divided by the translator, resulting in a total recoverable value. Transl ators can either be site speci fic numbers or default numbers. Because there are no site-specific translators for the Puyallup River, EPA guidance allows for the use of the criteria conver sion factors listed in Table C-6 as the translators (EPA 1996). In cases where there were no tribal metals conve rsion factors (e.g. arsenic, and mercury ), factors were obtained from Table 1 of EPA’s me tals guidance document (EPA 1996). Table C-7 summarizes the limits for metals in the draft permit. Mass-based limits were calculated by multiplying the concentration (in mg/L) by the treatment plant design flow (13.98 mgd) and a conversion factor of 8.34. Example calc ulations for the ammonia and copper effluent limits are provided in Appendix D. Table C-7: Metals Limits (total recovera ble) for the City of Puyallup Permit Parameter Monthly Average Daily Maximum Copper, Total Recoverable

ug/L lbs/day 8.5 0.99 13.7 1.60

F. pH Under 40 CFR 133.102 effluent pH must be within the range of 6.0 to 9.0 standard units for POTWs. In addition, the Tribe’s water quality standa rds for protection of aqua tic life require that ambient pH be in the range of 6.5 to 8.5 standard units. A model of pH mixing was used to determine the effluent pH valu es that would result in meeting the criteria at the edge of the mixing zone (Table C-8). Mixing zone boundary pH is a function of effluent and ambient pH, flow, alkalinity (bu ffering capacity), and temperature. The worst-case scenario is a warm, highly buffe red effluent being discharged into a warm, poorly buffered stream.Permit No.: WA0037168 City of Puyallup WWTP 40 Table C-8: Determination of pH Limits Calculation of pH of a mixture of two flows. Based on the procedure in EPA's DESCON program (EPA, 1988. Technical Guidance on Supplementary Stream Design Conditions for Steady State Modeling. USEPA Office of Water, Wa shington D.C.)

Based on Lotus File PHMIX2.WK1 Revised 19-Oct-93 INPUT

1. DILUTION FACTOR AT MIXING ZONE BOUNDARY 1.900
2. UPSTREAM/BACKGROUND CHARACTERISTICS Temperature (deg C): 15.90 pH: 7.70 A kalinity (mg CaCO3/L): 20.10 3. EFFLUENT CHARACTERISTICS Temperature (deg C): 23.18 pH: 6.42 A kalinity (mg CaCO3/L): 110.60 OUTPUT
1. IONIZATION CONSTANTS Upstream/Background pKa: 6.41 Effluent pKa: 6.36
2. IONIZATION FRACTIONS Upstream/Background Ionization Fraction: 0.95 Effluent Ionization Fraction: 0.53 3. TOTAL INORGANIC CARBON Upstream/Background Total Inorganic Carbon (mg CaCO3/L): 21.14 Effluent Total Inorganic Carbon (mg CaCO3/L): 208.17 4. CONDITIONS AT MIXING ZONE BOUNDARY Temperature (deg C): 19.73 A kalinity (mg CaCO3/L): 67.73 Total Inorganic Carbon (mg CaCO3/L): 119.57 pKa: 6.38 pH at Mixing Zone Boundary: 6.50 The effluent temperature used in the model is the 99th percentile of DMR temperature data from 2003 through 2011. The effluent alkalinity value represents the 95th perc entile of WET testing data (obtained December 2003, November 2004, November 2005, and November 2006). The 95 th percentile effluent alkalin ity value was used in the pr evious permit mixed hardness calculation. The upstream temperatur e value represents the 90th pe rcentile of data from Ecology river monitoring station 10A 070 from 1990 through 2007, plus additional temperature data supplied separately by the Puyallup Tribe for years 2004 and 2007. The upstream alkalinity was the 10th percentile of available 10A070 ri ver monitoring data (2006 through 2007). The upstream pH range represents the 10th and 90th percentile of 10A070 data from 1990 through 2007.Permit No.: WA0037168 City of Puyallup WWTP 41 The model indicated that an effluent pH within th e range of 6.4 to 9.0 is required to achieve a pH at the edge of the mixing zone that complies w ith the Tribe's water quality standards. Therefore, the draft permit contains a pH range of 6.4 to 9.0. G. Temperature EPA calculated the reasonable potential for the discharge to exceed the Puyallup Tribe’s freshwater temperature criteria at the edge of the chronic mixing zone during critical conditions. According to the Puyallup water quality standards: (iv) Temperature shall not exceed 18.0°C (freshwater) or 16.0°C (marine water) due to human activities. When natural conditions exceed 18.0° C (freshwater) and 16.0°C (marine water), no temperature increase will be allowed which will raise the receiving water temperature by greater than 0.3°C. Temperature reasonable potential was evaluated for this permit using a statistical representation of existing temper ature data, including data provi ded by the Puyallup Tribe. If there is sufficient ambient temperature monitoring data that indicates th e need for the Puyallup River to be listed as Categor y 5 “impaired” waters under Clea n Water Act section 303(d), a TMDL process would be used to determine “n atural” temperature conditions in the river. Currently, the most serious temperature listing for the Puyallup River is Category 2, which identifies waters where there is some evidence of a water quality problem, but not enough to require a TMDL at this time. Incremental temperature increases resulting from poi nt source activities shall not, at any time, exceed t=28/(T+7) (freshwater) or t=12/(T-2) (mar ine water). Incremental temperature increases resulting from nonpoint source ac tivities shall not exceed 2.8 °C. For purposes hereof, “t” represents the maximum permissible temper ature increase measured at a mixing zone boundary; and "T" represents the bac kground temperature as measured at a point or points unaffected by the discharge and representative of the highest ambient water temperature in the vicinity of the discharge. Therefore: t=28/(T+7) (freshwater) t=28/(15.9+7)= 1.22 And, 1.22<2.8 Therefore, the maximum permissible temperat ure increase at a mixing zone boundary is 1.22 degrees C. What is the temperature at the edge of the chronic mixing zone? Inputs: 1.) chronic dilution factor = 13.6 2.) Max Effluent Temperature = 23.6 3.) 7DADMax Ambient Temperature (T) (Upstream Background 90th percentile) = 15.9Permit No.: WA0037168 City of Puyallup WWTP 42 Output: = (23.6+(13.6-1)*15.9)/13.6 = 16.5 degrees C What is the temperature increase at the chronic mixi ng zone boundary? = 16.5 - 15.9 = 0.6 degrees C Conclusion: The max permissible temperature increase at a mixing zone boundary is 1.22 degrees C. 0.6 degrees C < 1.22 degrees C Therefore, there is no reasonabl e potential for temperature. IV. References EPA, 1999. 1999 Update of Ambient Water Quality Criteria for Ammonia. EPA822-R-99-014, December 1999. EPA, 1996. The Metals Translator: Guidance for Calc ulating A Total Recoverable Permit Limit From A Dissolved Criterion. EPA 823-B-96-007, June 1996.Permit No.: WA0037168 City of Puyallup WWTP 43 APPENDIX D – EXAMPLE EFFLUENT LIMIT CALCULATIONS This appendix steps through an example calculation of permit lim its for ammonia during the time period of November through April. Calculations for additional parameters, such as copper, are also provided. Step 1 : Determine the appropriate criteria A. Determine the uses The Puyallup River is protected by the Puya llup Tribe for the following uses: domestic, industrial and agricu ltural water supply, stock watering, fish and shellfish (including salmonids, crustaceans and other shellfish, and other fish), w ildlife habitat, ceremonial and religious water use, commerce, navigation, and pr imary and secondary recreation. B. Determine the most stringent criterion to protect the uses The most stringent criterion associated with th ese uses is for protection of salmonid spawning. The criteria for ammonia are based on temperat ure and pH (see Appendix C, section IV.D). Using reasonable assumptions for pH and temper ature results in the following seasonal acute criterion (CMC) and ch ronic criterion (CCC):

Table D-1: Unionized Ammonia Criteria

Time Period Receiving Water Conditions 1 Acute Criteria (ug/L) Chronic Criteria

(ug/L) pH Temperature (°C) November to April 7.67 9.0 85 19 May to October 7.70 15.9 140 31 Note: 1 Based on the 90th percentile of the rece iving water data collected from 1990 to 2007.

Step 2 : Determine whether there is “reas onable potential” to exceed the criteria 2A. Determine the “reasonable potential” multiplier The “reasonable potential” multiplier is based on the CV of the data and the number of data points. The data used are DMR results fr om August 2003 through December 2011, there are 50 data points for this period duri ng the months of November through April. The calculated CV is 1.754. (See Appendix E for efflue nt monitoring results.) Using the equations in Section 3.3.2. of the TS D, the reasonable potentia l multiplier (RPM) is calculated as follows:Permit No.: WA0037168 City of Puyallup WWTP 44 pn = (1 - confidence level)1/n where, pn = the percentile represente d by the highest concentration n = the number of samples pn = (1-0.99)1/30 pn = 0.86 This means that the largest value in the da ta set is greater than the 86th percentile. Next, the ratio of the 99th percen tile to the 86th percentile is calculated, based on the equation: Cp = exp(z σ - 0.5 σ 2 ) where,

σ 2 = ln(CV 2 +1) CV = coefficient of variation (= 1.754)

σ 2 = 1.405 z = normal distribution value = 2.326 for the 99th percentile = 1.080 for the 86th percentile C99 = exp(2.326 * 1.185 - 0.5 * 1.405) = 7.80 C86 = exp(1.080 * 1.185 - 0.5 * 1.405) = 1.78 RPM = C99/C86

= 7.80/1.78 RPM = 4.38 2B. Calculate the concentra tion of the pollutant at the edge of the mixing zonePermit No.: WA0037168 City of Puyallup WWTP 45 There is reasonable potential to exceed criteria if the maximum projected concentration of the pollutant at the edge of the mixing zone exceeds the criterion. The maximum projected concentration is calculated from the following equation: Cd = (Ce – Cu)/D + Cu where, Cd = receiving water concentration at the edge of the mixing zone Ce = maximum projected effluent concentration = maximum reported effluent concentration * reasonable potential multiplier (( 6.83*1000*0.01 ) * 4.38 = 299.2 ug/L unionized ammonia) Cu = upstream concentration of unionized ammonia (0.4 ug/L) D = dilution factor (1.9 for acute, 13.6 for chronic) Acute mixing zone concentration, Cd = (299.2 - 0.4)/1.9 + 0.4 Cd = 157.6 ug/L (> 85 ug/L) Chronic mixing zone concentration, Cd = (299.2 - 0.4)/13.6 +0.4 Cd = 22.37 ug/L (> 19 ug/L) The concentrations at the edges of the acute and chronic mixing zones are greater than the criteria, therefore a limit must be included in the permit. Step 3 : Calculate the wasteload allocations Wasteload allocations (WLAs) are calculated using the same mass balance equation used to calculate the concentration of the pollu tant at the edge of the mixing zone. However, Cd becomes the acute or chronic criteri on and Ce is replaced by the acute or chronic WLA. The equation is rearranged to solve for the WLA, becoming:

WLAa = D*(CMC - Cu) + Cu For the acute criterion, WLAa = 1.9 * (85 - 0.4) + 0.4 WLAa = 161.14 ug/LPermit No.: WA0037168 City of Puyallup WWTP 46 For the chronic criterion, WLAc = 13.6 * (19- 0.4) + 0.4 WLAc = 253.36 ug/L The WLAs are converted to long-term average concentrations, using the following equations from EPA’s Technical Support Document for Water Quality-based Toxics Control (TSD): LTAa = WLAa * exp[0.5 σ 2 - z σ ] LTAc = WLAc * exp[0.5 σ 42 - z σ 4] where,

σ 42 = ln(CV2/4 + 1) = 0.570 z = 2.326 for 99th percentile probability basis LTAa = 161.14 * exp[0.5 * 1.405 - 2.326 * 1.185] LTAa = 20.67 ug/L (November through April) LTAc = 253.36 * exp[0.5 * 0.570 - 2.326 * 0.755] LTAc = 58.19 ug/L (November through April) The LTAs are compared and the more stringent is used to develop the daily maximum and monthly average permit limits. In this cas e, the acute LTA is more stringent. Step 4 : Derive the maximum daily (MDL) and average monthly (AML) permit limits Example calculations for Step 4 are provided fo r the November through April time period. Using the TSD equations, the MDL and AML perm it limits are calculated as follows: MDL = LTA * exp[z σ -0.5 σ 2] where: z = 2.326 for 99th percentile probability basis
MDL= 20.67 * exp[2.326 * 1.185 - 0.5 * 1.405] MDL= 161.18 ug/L AML= LTA * exp[z σ n - 0.5 σ n2] where:Permit No.: WA0037168 City of Puyallup WWTP 47

σ n2 = ln(CV2/n + 1) = ln((1.7542)/4 + 1) = 0.570 z = 1.645 for 95th percentile probability basis n = number of samples AML= 20.67 * exp[1.645 * 0.755 - 0.5 * 0.570] AML= 53.82 ug/L These MDL and AML are expressed as unionized ammonia. These values must be converted back to total ammonia to reflect limits that ar e consistent with the ammonia monitoring required at the facility. Based on receiving water info rmation including pH and temperature, the percentage of total ammonia in the unionized form is approximately 1%. The conversion to mg/L total ammonia is as follows: AML = 53.82 ug/L / 0.01 = 16,117.54 ug/L / 1000 = 16.12 mg/L total ammonia MDL = 161.18 ug/L / 0.01 = 5,382.07 ug/L / 1000 = 5.38 mg/L total ammonia The mass-based limits correspondi ng to these concentrations are calculated based on the concentration limits, the wastewater treatment plant design flow of 13.98 mgd, and a conversion factor of 8.34. From November to April: Mass-based MDL = 16.12 mg/L x 19.5 mgd x 8.34 = 2621.6 lbs/day Mass-based AML = 5.38 mg/L x 19.5 mgd x 8.34 = 874.9 lbs/day The MDLs and AMLs calculated in this manner must be compared to existing limits to ensure the more stringent limits are selected for th e new permit. The existing ammonia limits for November through April are an AML of 6.8 mg/L and 793 lbs/day, and an MDL of 17.6 mg/L and 2,862 lbs/day. The ammonia limits below will be used in the new permit for the months of November through April. Note that the maximu m day mass-based limits for November to April is based on the winter maximum day design flow of 19.5 MGD. This design criterion was used in the previous permit cycle as requested by the Permittee. AML = 5.4 mg/L; 793 lbs/day MDL = 16.1 mg/L; 2,622 lbs/day Ammonia limits were not calculated in a simila r fashion for May to October as a reasonable potential was not found on the basis of recent efflue nt data. However, as discussed in Appendix C Section IV.D, mass-based effluent limits for a mmonia were still assign ed for the period of May to October based on preventative TMDL waste load allocations and the prohibition on backsliding. Table D-2 summarizes the reasonable potential and effluent limit calculations for pollutants found in the treatment plant effluent. A reasona ble potential to exceed water quality standardsPermit No.: WA0037168 City of Puyallup WWTP 48 was found for ammonia and copper. The resulting limits for ammonia and copper were compared to effluent limits in the previous perm it, with the more stringent limit being selected for the new permit. Arsenic may also have been found to pose a reasonable potential to exceed human health criteria for the consumption of water and aquatic organisms (fish). A special course of arsenic monitoring has therefore been included in the draft perm it and is discussed in Section IX.B. of th is fact sheet.Permit No.: WA0037168 City of Puyallup WWTP 49

Table D-2. Reasonable Potentia l Calculations and Limits

Reasonable Potential Calculation Water Body Type Freshwater Facility:

Dilution Factors: Acute Chronic Puyallup

Aquatic Life 1.9 13.6 Human Health Carcinogenic 13.6 Human Health Non-Carcinogenic 13.6 Unionized NH3 Nov-April May-Oct Total AsAMMONIA, Criteria as Total NH3AMMONIA, Criteria as Total NH4ARSENIC (dissolved) 74403822MARSENIC (inorganic)CADMIUM - 7440439 4MHardness dependentCHROMIUM(TRI) -16065831 5MHardness dependentCOPPER - 744058 6M HardnessdependentENDOSULFAN a 959988 11P, b33213659 12PLEAD - 7439921 7M Dependenton hardnessMERCURY 7439976 8MNICKEL - 7440020 9M -Dependent on hardnessSELENIUM 7782492 10MSILVER - 7740224 11Mdependent on hardness.ZINC- 7440666 13M hardnessdependent

50 52 26 26 26 23 60 6 102 100 26 26 26 73 1.75 1.14 0.23 0.23 0.47 0.67 0.548 0.6 0.52 2.34 0.25 0.67 0.48 0.317 68 66 1.38 0.18 2.7 81 0.05 1 0.02 3 1.1 0.3 72.04

1.1 0.00265 2.4 0.4 0.4 1.03 0.02 0.26 0.94 0 0.05 0.008 0.52 0 0.02 2.66 0 0 0.002 0.415 Acute 85 140 360 - 1.326639 878.215 6.974045 0.22 19.43943 2.4 666.248 20 0.51487 51.5035 Chronic 19 31 190 - 0.33554 67.5912 3.170695 0.056 0.383819 0.012 47.1403 5 - 29.6696 - - - 0.018 - - - 0.93 - 0.14 610 - - -

Acute - - 1 - 0.865 - 0.862 - 0.687 0.95 - 0.531 0.891 Chronic - - 1 - 0.865 - 0.862 - 0.687 - 0.95 - - 0.891 N N Y Y N N N N N N N N N N Aquatic Life Criteria, ug/L

Carcinogen? WQ Criteria for Protection of Human Health, ug/L Metal Criteria Translator, decimal Water Quality Criteria Receiving Water Data 90th Percentile Conc., ug/L Geo Mean, ug/L Coeff of Variation (Cv)

Calculated 50th percentile Effluent Conc. (when n>10) Pollutant, CAS No. & NPDES Application Ref. No.

Effluent Data # of Samples (n) Effluent Concentration, ug/L (Max. or 99th Percentile)

Aquatic Life Reasonable Potential s 1.184 0.913 0.227 0.447 0.609 0.512 0.555 0.489 1.367 0.246 0.609 0.455 0.309 Pn 0.912 0.915 0.838 0.838 0.819 0.926 0.464 0.956 0.955 0.838 0.838 0.838 0.939 Multiplier 3.16 2.38 1.36 1.82 2.37 1.57 3.82 1.36 2.37 1.39 2.26 1.84 1.27 Max concentration (ug/L) at edge of... Acute Chronic 114 16 83 12 1.473 1.092 0.159 0.039 3.489 0.711 58.089 8.924 0.100 0.014 0.514 0.115 0. 029 0.011 2.333 0.773 1.310 0.183 0.164 0.059 44.274 8.474 Reasonable Potential? Limit Required? YES NO NO NO NO YES NO NO NO NO NO NO NOPermit No.: WA0037168 City of Puyallup WWTP 50 Copper Effluent Limit Calculation

Criteria Calculations per Tribal Standards INPUTS::: acute criteria = (0.862)*(EXP(0.9422*LN(acute hardness)-1.464)) = 6.97 ug/L dissolved Cu acute hardness = 43.5 mg/L CaCO 3 acute dilution = 1.9 chronic cr teria = (0.862)*(EXP(0.8545*LN(chronic hardness)-1.465)) = 3.17 ug/L dissolved Cu chronic hardness = 25.5 mg/L CaCO 3 chronic dilution = 13.9 background Cu = 0.94 <-- u g /L dissolved Co pp er (dissolved Cu data from upstream long-term monitoring station #10A070).
WLAa/WLAc WLAa = ( acute cr terion *acute DF )

- ( back g round Cu * ( acute DF-1 )) = 12.40 WLAb = (chronic cr ter on *chron c DF)-(background Cu *(chron c DF-1)) = 31.95 TLAa/TLAc LTAa = (WLAa)*(EXP(0.5 σ ^2 - z σ )) = 4.29 σ ^2 = LN(CV^2 + 1) = 0.263 z = 2.326 CV = 0.548 <-- Derived from last three years of DMRs. LTAc = (WLAb)*(EXP(0.5* σ ^2 - 2.326*SQRT( σ ^2))) = 17.72 σ ^2 = LN(CV^2/4 + 1) = 0.072

Choose lowest LTA LTAa < LTAc therefore LTAa is used for calculatin g MDL and AML MDL MDL = (LTAa)*(EXP(2.326*SQRT( σ ^2) - 0.5* σ ^2)) = 12.40 ug/L dissolved Cu σ ^2 = LN(CV^2 + 1) = 0.263 z = 2.326
AML AML = (LTAa)*(EXP(1.645*SQRT( σ n ^2) - 0.5* σ n ^2)) = 8.75 ug/L dissolved Cu n = 1 σ n ^2 = LN((CV^2)/n + 1) = 0.263 Convert dissolved limits to total recoverable using metals translators. Use conversion factors as translators per EPA guidance (EPA 823-B-96-007). MDL tr = MDL dis/0.862 = 14.39 ug/L total recoverable Cu AML_tr = AML_dissolved/0.862 = 10.15 ug/L total recoverable Cu Compare new and existing limits, choosing the most stringent for new permit. Calculated Limit vs. Existing Limit Limit for New Permit MDL = 14.39 ppb 13.7 ppb (ug/L) ---> 13.7 ppb Cu AML = 10.15 ppb 8.5 ppb (ug/L) ---> 8.5 ppb CuPermit No.: WA0037168 City of Puyallup WWTP 51 APPENDIX E – MONITORING DATA 5 Puyallup River Receiving Water pH Puyallup River Receiving Water Temp. ( o C) DATE TIME PARAMETER VALUE 9/26/2007 9:20 PH 7.59 8/22/2007 8:55 PH 7.51 7/18/2007 9:28 PH 7.41 6/13/2007 8:10 PH 7.35 5/23/2007 9:20 PH 7.73 4/25/2007 8:30 PH 7.39 3/21/2007 9:00 PH 7.54 2/14/2007 8:55 PH 7.23 1/24/2007 10:30 PH 7.36 11/15/2006 10:20 PH 7.21 10/18/2006 12:00 PH 7.47

9/25/2006 12:00 PH 7.36 8/21/2006 10:05 PH 7.84 7/24/2006 9:55 PH 7.29 6/19/2006 9:15 PH 7.33 4/17/2006 11:10 PH 7.56 3/13/2006 10:45 PH 7.46 2/13/2006 12:14 PH 7.37 1/23/2006 14:12 PH 7.35 DATE TIME TEST VALUE 9/26/2007 9:20 TEMP 10.2 8/22/2007 8:55 TEMP 13.5 7/18/2007 9:28 TEMP 14.3 6/13/2007 8:10 TEMP 12.7 5/23/2007 9:20 TEMP 9.7 4/25/2007 8:30 TEMP 9.4 3/21/2007 9:00 TEMP 4.4 2/14/2007 8:55 TEMP 5.1 1/24/2007 10:30 TEMP 3.9 12/20/2006 10:30 TEMP 3.9 11/15/2006 10:20 TEMP 7.3 10/18/2006 12:00 TEMP 10.8

9/25/2006 12:00 TEMP 12.3 8/21/2006 10:05 TEMP 13.8 7/24/2006 9:55 TEMP 15.5 6/19/2006 9:15 TEMP 11.1 5/15/2006 10:30 TEMP 11.8 4/17/2006 11:10 TEMP 6.5 3/13/2006 10:45 TEMP 4.8

5 U flagged data accounted for as 0.5 times the undetected concentration.Permit No.: WA0037168 City of Puyallup WWTP 52

12/12/2005 11:23 PH 7.42 2/13/2006 12:14 TEMP 6 11/14/2005 13:00 PH 7.41 1/23/2006 14:12 TEMP 6.4 10/17/2005 9:55 PH 7.52 12/12/2005 11:23 TEMP 3.3

9/19/2005 10:00 PH 7.46 11/14/2005 13:00 TEMP 7.3 8/15/2005 11:50 PH 7.23 10/17/2005 9:55 TEMP 11.7 7/18/2005 10:40 PH 7.29 9/19/2005 10:00 TEMP 11.7 6/13/2005 16:50 PH 7.74 8/15/2005 11:50 TEMP 15 5/23/2005 16:15 PH 7.6 7/18/2005 10:40 TEMP 15.4 4/18/2005 15:40 PH 7.46 6/13/2005 16:50 TEMP 14.4 3/28/2005 16:30 PH 7.48 5/23/2005 16:15 TEMP 11.5 2/14/2005 16:25 PH 7.51 4/18/2005 15:40 TEMP 9 1/24/2005 16:40 PH 7.28 3/28/2005 16:30 TEMP 7.8 12/13/2004 15:35 PH 7.36 2/14/2005 16:25 TEMP 5.4 11/15/2004 16:30 PH 7.64 1/24/2005 16:40 TEMP 7.6 10/18/2004 17:00 PH 7.37 12/13/2004 15:35 TEMP 6.1

9/21/2004 13:45 PH 7.45 11/15/2004 16:30 TEMP 9.4 8/17/2004 11:15 PH 7.24 10/18/2004 17:00 TEMP 10.2 7/20/2004 13:54 PH 7.43 9/21/2004 13:45 TEMP 11.7 6/22/2004 15:05 PH 7.48 8/17/2004 11:15 TEMP 14.1 5/18/2004 13:55 PH 7.55 7/20/2004 13:54 TEMP 14.4 4/20/2004 13:40 PH 7.79 6/22/2004 15:05 TEMP 14.6 3/23/2004 12:15 PH 7.62 5/18/2004 13:55 TEMP 12.3 2/24/2004 14:32 PH 7.46 4/20/2004 13:40 TEMP 10 1/27/2004 12:56 PH 7.43 3/23/2004 12:15 TEMP 9.5 12/16/2003 14:15 PH 7.32 2/24/2004 14:32 TEMP 7.2Permit No.: WA0037168 City of Puyallup WWTP 53

11/18/2003 14:49 PH 7.45 1/27/2004 12:56 TEMP 4.7 10/21/2003 15:06 PH 7.24 12/16/2003 14:15 TEMP 6

9/24/2003 13:40 PH 7.42 11/18/2003 14:49 TEMP 8.4 8/18/2003 14:25 PH 7.31 10/21/2003 15:06 TEMP 11.9 7/21/2003 16:30 PH 7.38 9/24/2003 13:40 TEMP 12.4 6/16/2003 15:00 PH 7.55 8/18/2003 14:25 TEMP 14.7 5/19/2003 12:55 PH 8.05 7/21/2003 16:30 TEMP 17.9 4/21/2003 13:30 PH 7.35 6/16/2003 15:00 TEMP 14.9 3/19/2003 12:55 PH 7.23 5/19/2003 12:55 TEMP 9.1 2/24/2003 14:05 PH 7.34 4/21/2003 13:30 TEMP 9.4 1/27/2003 13:23 PH 7.22 3/19/2003 12:55 TEMP 6 12/11/2002 14:50 PH 7.43 2/24/2003 14:05 TEMP 4 11/18/2002 13:25 PH 7.36 1/27/2003 13:23 TEMP 7 10/23/2002 14:10 PH 7.45 12/11/2002 14:50 TEMP 6

9/24/2002 14:00 PH 7.58 11/18/2002 13:25 TEMP 8.9 8/27/2002 17:00 PH 7.44 10/23/2002 14:10 TEMP 10.6 7/30/2002 14:00 PH 7.31 9/24/2002 14:00 TEMP 12.4 6/25/2002 14:10 PH 7.48 8/27/2002 17:00 TEMP 16.5 5/28/2002 15:02 PH 7.45 7/30/2002 14:00 TEMP 14.3 4/16/2002 14:05 PH 7.36 6/25/2002 14:10 TEMP 14.3 3/26/2002 12:23 PH 7.68 5/28/2002 15:02 TEMP 11.2 2/19/2002 14:52 PH 7.56 4/16/2002 14:05 TEMP 6.7 1/29/2002 13:14 PH 7.21 3/26/2002 12:23 TEMP 6.6 12/11/2001 12:37 PH 7.62 2/19/2002 14:52 TEMP 6 11/27/2001 13:00 PH 7.46 1/29/2002 13:14 TEMP 3.3Permit No.: WA0037168 City of Puyallup WWTP 54

10/30/2001 12:10 PH 7.36 12/11/2001 12:37 TEMP 5.4

9/19/2001 15:26 PH 7.57 11/27/2001 13:00 TEMP 6.2 8/22/2001 16:20 PH 7.52 10/30/2001 12:10 TEMP 9 7/18/2001 13:10 PH 7.57 9/19/2001 15:26 TEMP 12.2 6/20/2001 13:10 PH 7.55 8/22/2001 16:20 TEMP 12.4 5/23/2001 14:15 PH 7.7 7/18/2001 13:10 TEMP 14 4/18/2001 13:05 PH 7.63 6/20/2001 13:10 TEMP 14.3 3/21/2001 12:45 PH 7.83 5/23/2001 14:15 TEMP 14.3 2/28/2001 13:45 PH 7.43 4/18/2001 13:05 TEMP 9.5 1/24/2001 15:00 PH 7.7 3/21/2001 12:45 TEMP 7.4 12/6/2000 14:00 PH 7.57 2/28/2001 13:45 TEMP 4.3 11/15/2000 12:50 PH 7.56 1/24/2001 15:00 TEMP 5.1 10/18/2000 12:40 PH 7.6 12/6/2000 14:00 TEMP 4.1

9/20/2000 13:10 PH 7.3 11/15/2000 12:50 TEMP 4.5 8/23/2000 13:25 PH 7.53 10/18/2000 12:40 TEMP 10.9 7/19/2000 13:35 PH 7.7 9/20/2000 13:10 TEMP 12.4 6/21/2000 13:50 PH 7.6 8/23/2000 13:25 TEMP 15.2 5/17/2000 14:50 PH 7.8 7/19/2000 13:35 TEMP 12.5 4/19/2000 14:10 PH 7.8 6/21/2000 13:50 TEMP 10.9 3/22/2000 14:20 PH 7.6 5/17/2000 14:50 TEMP 9.2 2/16/2000 14:30 PH 7.4 4/19/2000 14:10 TEMP 8.5 1/19/2000 14:40 PH 7.6 3/22/2000 14:20 TEMP 5.4 12/8/1999 14:05 PH 7.4 2/16/2000 14:30 TEMP 0 11/3/1999 15:10 PH 7.3 1/19/2000 14:40 TEMP 1.9 10/20/1999 16:15 PH 7.6 12/8/1999 14:05 TEMP 4.4Permit No.: WA0037168 City of Puyallup WWTP 55 9/22/1999 13:40 PH 7.5 11/3/1999 15:10 TEMP 5.4 8/18/1999 13:20 PH 7.4 10/20/1999 16:15 TEMP 9.7 7/21/1999 14:45 PH 7.6 9/22/1999 13:40 TEMP 13.4 5/26/1999 13:55 PH 7.5 8/18/1999 13:20 TEMP 14.4 4/21/1999 15:20 PH 8.2 7/21/1999 14:45 TEMP 12.4 3/24/1999 14:00 PH 7.9 6/23/1999 14:35 TEMP 9.7 2/17/1999 14:40 PH 7.5 5/26/1999 13:55 TEMP 9.3 1/20/1999 16:05 PH 7.4 4/21/1999 15:20 TEMP 7.8 12/16/1998 13:30 PH 7.3 3/24/1999 14:00 TEMP 7.1 10/21/1998 16:50 PH 7.6 2/17/1999 14:40 TEMP 4.5

9/23/1998 8:20 PH 7.4 1/20/1999 16:05 TEMP 5 8/19/1998 7:20 PH 7.5 12/16/1998 13:30 TEMP 5.5 7/22/1998 7:15 PH 7.1 11/18/1998 15:10 TEMP 6.4 6/24/1998 7:30 PH 6.9 10/21/1998 16:50 TEMP 9.1 5/20/1998 7:30 PH 7.3 9/23/1998 8:20 TEMP 12.5 4/22/1998 7:25 PH 7.4 8/19/1998 7:20 TEMP 10.8 3/18/1998 8:00 PH 7.2 7/22/1998 7:15 TEMP 15.5 2/19/1998 8:10 PH 7.3 6/24/1998 7:30 TEMP 11.8 1/21/1998 8:28 PH 6.8 5/20/1998 7:30 TEMP 10 12/17/1997 9:30 PH 7.1 4/22/1998 7:25 TEMP 9.6 11/19/1997 8:30 PH 7 3/18/1998 8:00 TEMP 5.6 10/22/1997 7:45 PH 6.8 2/19/1998 8:10 TEMP 5.3

9/23/1997 11:05 PH 7.4 1/21/1998 8:28 TEMP 3.4 8/20/1997 10:45 PH 7.4 12/17/1997 9:30 TEMP 5.3 7/23/1997 10:55 PH 7.4 11/19/1997 8:30 TEMP 6.7Permit No.: WA0037168 City of Puyallup WWTP 56 6/18/1997 11:40 PH 7.6 10/22/1997 7:45 TEMP 9.2 5/21/1997 11:05 PH 7.4 9/23/1997 11:05 TEMP 15.3 4/23/1997 11:10 PH 7.5 8/20/1997 10:45 TEMP 14.2 3/19/1997 11:15 PH 7.3 7/23/1997 10:55 TEMP 13.1 2/19/1997 11:40 PH 7.4 6/18/1997 11:40 TEMP 11 1/22/1997 11:25 PH 7.3 5/21/1997 11:05 TEMP 9.1 12/17/1996 12:05 PH 7.4 4/23/1997 11:10 TEMP 7.8 11/20/1996 11:15 PH 7.7 3/19/1997 11:15 TEMP 6.6 10/23/1996 11:45 PH 7.6 2/19/1997 11:40 TEMP 4.6

9/18/1996 13:15 PH 7.6 1/22/1997 11:25 TEMP 5.1 8/21/1996 13:20 PH 7.7 12/17/1996 12:05 TEMP 4.5 7/24/1996 13:10 PH 7.5 11/20/1996 11:15 TEMP 3.5 6/19/1996 13:00 PH 7.7 10/23/1996 11:45 TEMP 7.5 5/22/1996 13:45 PH 7.6 9/18/1996 13:15 TEMP 9.8 4/24/1996 12:55 PH 7.4 8/21/1996 13:20 TEMP 14.8 3/20/1996 13:30 PH 7.2 7/24/1996 13:10 TEMP 17.9 2/21/1996 13:35 PH 7.3 6/19/1996 13:00 TEMP 12.9 1/24/1996 14:15 PH 7.2 5/22/1996 13:45 TEMP 10.2 12/19/1995 13:20 PH 7.5 4/24/1996 12:55 TEMP 8.3 11/21/1995 14:30 PH 7.2 3/20/1996 13:30 TEMP 7.7 10/18/1995 13:30 PH 7.6 2/21/1996 13:35 TEMP 5.7

9/18/1995 7:25 PH 7.2 1/24/1996 14:15 TEMP 4.8 8/21/1995 7:40 PH 6.9 12/19/1995 13:20 TEMP 6 7/17/1995 8:00 PH 7.1 11/21/1995 14:30 TEMP 7.3 6/19/1995 7:35 PH 7.7 10/18/1995 13:30 TEMP 10.6Permit No.: WA0037168 City of Puyallup WWTP 57 5/15/1995 7:05 PH 7.2 9/18/1995 7:25 TEMP 13.2 4/17/1995 7:50 PH 7 8/21/1995 7:40 TEMP 14.9 3/20/1995 7:40 PH 7.5 7/17/1995 8:00 TEMP 16.8 2/20/1995 7:50 PH 7.4 6/19/1995 7:35 TEMP 12.6 1/16/1995 7:50 PH 7.7 5/15/1995 7:05 TEMP 12.9 12/19/1994 7:50 PH 7.8 4/17/1995 7:50 TEMP 8.5 11/14/1994 8:30 PH 7.3 3/20/1995 7:40 TEMP 7.3 10/17/1994 7:40 PH 7.4 2/20/1995 7:50 TEMP 6.4

9/28/1994 10:50 PH 7.3 1/16/1995 7:50 TEMP 4.7 8/24/1994 10:30 PH 7.6 12/19/1994 7:50 TEMP 5.2 7/27/1994 11:10 PH 7.1 11/14/1994 8:30 TEMP 7.1 6/29/1994 10:30 PH 7.4 10/17/1994 7:40 TEMP 8.6 5/25/1994 11:40 PH 7.7 9/28/1994 10:50 TEMP 12.8 4/27/1994 11:20 PH 7.5 8/24/1994 10:30 TEMP 14.2 3/30/1994 9:50 PH 7.4 7/27/1994 11:10 TEMP 15.8 2/23/1994 10:35 PH 7.4 6/29/1994 10:30 TEMP 14.8 1/26/1994 12:00 PH 7.5 5/25/1994 11:40 TEMP 13.6 12/21/1993 12:15 PH 7.4 4/27/1994 11:20 TEMP 8.6 11/22/1993 14:40 PH 7.6 3/30/1994 9:50 TEMP 7.7 10/27/1993 11:40 PH 7.3 2/23/1994 10:35 TEMP 4.1

9/28/1993 13:05 PH 7.2 1/26/1994 12:00 TEMP 5.6 7/27/1993 11:50 PH 7.4 12/21/1993 12:15 TEMP 3.5 6/29/1993 12:35 PH 7.5 11/22/1993 14:40 TEMP 5.1 5/25/1993 11:30 PH 7.2 10/27/1993 11:40 TEMP 10.5 4/27/1993 12:15 PH 7.5 9/28/1993 13:05 TEMP 11.6Permit No.: WA0037168 City of Puyallup WWTP 58 3/23/1993 11:45 PH 7.2 8/24/1993 12:40 TEMP 13 2/23/1993 11:00 PH 7.3 7/27/1993 11:50 TEMP 15.9 1/26/1993 12:05 PH 7.2 6/29/1993 12:35 TEMP 12.3 12/21/1992 12:30 PH 7.6 5/25/1993 11:30 TEMP 12.5 11/22/1992 13:15 PH 7.2 4/27/1993 12:15 TEMP 9 10/27/1992 12:20 PH 7.5 3/23/1993 11:45 TEMP 7.1

9/30/1992 9:40 PH 7.6 2/23/1993 11:00 TEMP 2.9 8/26/1992 9:00 PH 7.4 1/26/1993 12:05 TEMP 6.6 7/29/1992 9:30 PH 7.5 12/21/1992 12:30 TEMP 4.3 6/24/1992 8:50 PH 7.5 11/22/1992 13:15 TEMP 6.9 5/27/1992 9:25 PH 7.1 10/27/1992 12:20 TEMP 10.4 4/29/1992 9:25 PH 7.6 9/30/1992 9:40 TEMP 13 3/25/1992 9:15 PH 7 8/26/1992 9:00 TEMP 13.2 2/26/1992 9:45 PH 7.3 7/29/1992 9:30 TEMP 14.1 1/29/1992 9:20 PH 7.5 6/24/1992 8:50 TEMP 15.9 12/18/1991 9:10 PH 7.4 5/27/1992 9:25 TEMP 13.4 11/20/1991 9:30 PH 7.2 4/29/1992 9:25 TEMP 11.8 10/30/1991 9:50 PH 7.2 3/25/1992 9:15 TEMP 9.3

9/25/1991 10:40 PH 7.4 2/26/1992 9:45 TEMP 6.8 8/28/1991 10:55 PH 7.4 1/29/1992 9:20 TEMP 6.4 7/31/1991 10:10 PH 7.9 12/18/1991 9:10 TEMP 4.5 6/26/1991 10:25 PH 7 11/20/1991 9:30 TEMP 7 5/29/1991 12:15 PH 7.7 10/30/1991 9:50 TEMP 8 4/24/1991 11:05 PH 7.4 9/25/1991 10:40 TEMP 11.5 3/27/1991 10:55 PH 7 8/28/1991 10:55 TEMP 13.8Permit No.: WA0037168 City of Puyallup WWTP 59 2/27/1991 10:35 PH 7.3 7/31/1991 10:10 TEMP 14.4 1/30/1991 13:30 PH 7.3 6/26/1991 10:25 TEMP 12 12/19/1990 11/28/1990 13:25 13:50 PH PH 7.6 7.4 5/29/1991 4/24/1991 12:15 11:05 TEMP TEMP 10.9 9.2 10/31/1990

9/26/1990 13:25 11:20 PH PH 7.7 7.6 3/27/1991 2/27/1991 10:55 10:35 TEMP TEMP 6.2 5.8 8/29/1990 7/31/1990 11:45 11:50 PH PH 7.5 7.6 1/30/1991 12/19/1990 13:30 13:25 TEMP TEMP 2.9 2 6/27/1990 10:35 PH 7.3 11/28/1990 13:50 TEMP 6.3 5/31/1990 4/25/1990 10:45 11:35 PH PH 7.3 7.1 10/31/1990 9/26/1990 13:25 11:20 TEMP TEMP 9.1 14.2 3/28/1990 2/28/1990 13:40 10:25 PH PH 7.7 7.3 8/29/1990 7/31/1990 11:45 11:50 TEMP TEMP 16.1 14.1 6/27/1990 5/31/1990 10:35 10:45 TEMP TEMP 13.5 10.7 4/25/1990 11:35 TEMP 8.7 3/28/1990 2/28/1990 13:40 10:25 TEMP TEMP 8.5 3.9 1/31/1990 11:10 TEMP 4.1Permit No.: WA0037168 City of Puyallup WWTP 60

Puyallup River Receiving Water Hardness (mg/L as CaCO 3 ) Puyallup River Receiving Water Metals (ug/L) 8/21/2006 10:05 HARD 32.7 6/19/2006 9:15 HARD 23.9 2/13/2006 12:14 HARD 31.6 12/12/2005 11:23 HARD 32.3 10/17/2005 9:55 HARD 32.3

8/20/1997 10:45 HARD 27 6/18/1997 11:40 HARD 21 4/23/1997 11:10 HARD 24 2/19/1997 11:40 HARD 22 12/17/1996 12:05 HARD 28 10/23/1996 11:45 HARD 26

8/21/1996 13:20 HARD 30 6/19/1996 13:00 HARD 26 4/24/1996 12:55 HARD 26 2/21/1996 13:35 HARD 24 12/19/1995 13:20 HARD 24 10/18/1995 13:30 HARD 20

3/20/1995 7:40 HARD 28 1/16/1995 7:50 HARD 26 11/14/1994 8:30 HARD 28

9/28/1994 10:50 HARD 41E 7/27/1994 11:10 HARD 37E 8/21/2006 10:05 Ag_DIS 0.02 U 6/19/2006 9:15 Ag_DIS 0.02 U 2/13/2006 12:14 Ag_DIS 0.02 U 12/12/2005 11:23 Ag_DIS 0.02 U 10/17/2005 9:55 Ag_DIS 0.02 U

8/21/2006 10:05 As_DIS 0.42 6/19/2006 9:15 As_DIS 0.57 2/13/2006 12:14 As_DIS 0.5 12/12/2005 11:23 As_DIS 0.55 10/17/2005 9:55 As_DIS 0.6

8/21/2006 10:05 As_TR 1.14 6/19/2006 9:15 As_TR 0.68 2/13/2006 12:14 As_TR 0.53 12/12/2005 11:23 As_TR 0.63 10/17/2005 9:55 As_TR 0.79

6/25/2002 14:10 As_TR 0.58 5/28/2002 15:02 As_TR 0.77 4/16/2002 14:05 As_TR 0.96 3/26/2002 12:23 As_TR 0.47 2/19/2002 14:52 As_TR 0.62Permit No.: WA0037168 City of Puyallup WWTP 61 5/25/1994 11:40 HARD 24E 1/29/2002 13:14 As_TR 0.47 10/30/1991 9:50 HARD 30 12/11/2001 12:37 As_TR 0.67 10/13/1982 12:15 HARD 32 11/27/2001 13:00 As_TR 0.56 12/18/1974 11:50 HARD 24 10/30/2001 12:10 As_TR 0.63 12/11/1974 10:20 HARD 37 9/19/2001 15:26 As_TR 0.85 11/20/1974 11:15 HARD 35 8/22/2001 16:20 As_TR 1.1 11/14/1974 11:00 HARD 28

Puyallup River Receiving Water NH3-N (mg/L) Puyallup River Receiving Water Metals (ug/L) 9/26/2007 9:20 NH3_N 0.044 8/22/2007 8:55 NH3_N 0.01 U 7/18/2007 9:28 NH3_N 0.017 6/13/2007 8:10 NH3_N 0.01 5/23/2007 9:20 NH3_N 0.01 U 4/25/2007 8:30 NH3_N 0.01 U 3/21/2007 9:00 NH3_N 0.01 U 2/14/2007 8:55 NH3_N 0.021 1/24/2007 10:30 NH3_N 0.038 12/20/2006 10:30 NH3_N 0.03 11/15/2006 10:20 NH3_N 0.01 U 10/18/2006 12:00 NH3_N 0.013

9/25/2006 12:00 NH3_N 0.012 8/21/2006 10:05 Cu_DIS 0.65 6/19/2006 9:15 Cu_DIS 0.74 2/13/2006 12:14 Cu_DIS 0.87 12/12/2005 11:23 Cu_DIS 0.79 10/17/2005 9:55 Cu_DIS 0.95

8/20/1997 10:45 CU_DIS 0.514 6/18/1997 11:40 CU_DIS 0.716 4/23/1997 11:10 CU_DIS 0.781 2/19/1997 11:40 CU_DIS 0.715 12/17/1996 12:05 CU_DIS 0.77 10/23/1996 11:45 CU_DIS 0.794

8/21/1996 13:20 CU_DIS 0.49 6/19/1996 13:00 CU_DIS 0.571Permit No.: WA0037168 City of Puyallup WWTP 62 8/21/2006 10:05 NH3_N 0.01 U 7/24/2006 9:55 NH3_N 0.01 6/19/2006 9:15 NH3_N 0.01 U 5/15/2006 10:30 NH3_N 0.01 U 4/17/2006 11:10 NH3_N 0.011 3/13/2006 10:45 NH3_N 0.01 U 2/13/2006 12:14 NH3_N 0.024 1/23/2006 14:12 NH3_N 0.016 12/12/2005 11:23 NH3_N 0.017 11/14/2005 13:00 NH3_N 0.01 U 10/17/2005 9:55 NH3_N 0.031

9/19/2005 10:00 NH3_N 0.015 8/15/2005 11:50 NH3_N 0.01 U 7/18/2005 10:40 NH3_N 0.012 6/13/2005 16:50 NH3_N 0.01 U 5/23/2005 16:15 NH3_N 0.01 U 4/18/2005 15:40 NH3_N 0.022 3/28/2005 16:30 NH3_N 0.024 2/14/2005 16:25 NH3_N 0.065 1/24/2005 16:40 NH3_N 0.022 12/13/2004 15:35 NH3_N 0.018 11/15/2004 16:30 NH3_N 0.025 10/18/2004 17:00 NH3_N 0.01 U

9/21/2004 13:45 NH3_N 0.012 8/17/2004 11:15 NH3_N 0.01 U 4/24/1996 2/21/1996 12/19/1995 10/16/1995

3/20/1995 1/16/1995 11/14/1994

9/28/1994 7/27/1994 5/25/1994

8/21/2006

6/19/2006 2/13/2006

12/12/2005 10/17/2005

8/20/1997 6/18/1997

4/23/1997 2/19/1997 12/17/1996 10/23/1996 12:55 CU_DIS 1.37 13:35 CU_DIS 0.878 13:20 CU_DIS 0.708 14:01 CU_DIS 0.903

7:40 CU_DIS 1.55 7:50 CU_DIS 0.855 8:30 CU_DIS 0.865 10:50 CU_DIS 0.535 11:10 CU_DIS 0.531 11:40 CU_DIS 0.446

10:05 Hg 0.0136 0.002 9:15 Hg U 12:14 Hg 0.0034 0.002 11:23 Hg U

9:55 Hg 0.0035 10:45 HG 0.003 11:40 HG 0.002 0.002 11:10 HG U 11:40 HG 0.003 12:05 HG 0.003 11:45 HG 0.001Permit No.: WA0037168 City of Puyallup WWTP 63 7/20/2004 13:54 NH3_N 6/22/2004 15:05 NH3_N 5/18/2004 13:55 NH3_N 4/20/2004 13:40 NH3_N 3/23/2004 12:15 NH3_N 2/24/2004 14:32 NH3_N 1/27/2004 12:56 NH3_N 12/16/2003 14:15 NH3_N 11/18/2003 14:49 NH3_N 10/21/2003 15:06 NH3_N

9/24/2003 13:40 NH3_N 8/18/2003 14:25 NH3_N 7/21/2003 16:30 NH3_N 6/16/2003 15:00 NH3_N 5/19/2003 12:55 NH3_N 4/21/2003 13:30 NH3_N 3/19/2003 12:55 NH3_N 2/24/2003 14:05 NH3_N 1/27/2003 13:23 NH3_N 12/11/2002 14:50 NH3_N 11/18/2002 13:25 NH3_N 10/23/2002 14:10 NH3_N

9/24/2002 14:00 NH3_N 8/27/2002 17:00 NH3_N 7/30/2002 14:00 NH3_N 0.048 0.01 U 0.011 0.013 0.016 0.024 0.015 0.025

0.01 U 0.012 0.021 0.019 0.016 0.014 0.013 0.033

0.01 U 0.011 0.019

0.06 0.01 U 0.014

0.02 0.013 0.024 U 8/21/1996 13:20 HG 0.003 6/19/1996 13:00 HG 0.001 0.001 4/24/1996 12:55 HG U 2/21/1996 13:35 HG 0.005 J 12/19/1995 13:20 HG 0.004 J 10/18/1995 13:30 HG 0.002

3/20/1995 7:40 HG 0.001 J 0.001 1/16/1995 7:50 HG U 11/14/1994 8:30 HG 0.002 J

9/28/1994 10:50 HG 0.017 7/27/1994 11:10 HG 0.009 J 5/25/1994 11:40 HG 0.001 J

8/21/2006 10:05 Pb_DIS 0.029 6/19/2006 9:15 Pb_DIS 0.031 2/13/2006 12:14 Pb_DIS 0.027 12/12/2005 11:23 Pb_DIS 0.037 10/17/2005 9:55 Pb_DIS 0.04 0.02 8/20/1997 10:45 PB_DIS U 0.02 6/18/1997 11:40 PB_DIS UPermit No.: WA0037168 City of Puyallup WWTP 64 6/25/2002 14:10 NH3_N 0.02 5/28/2002 15:02 NH3_N 0.02 4/16/2002 14:05 NH3_N 0.018 3/26/2002 12:23 NH3_N 0.027 2/19/2002 14:52 NH3_N 0.034 1/29/2002 13:14 NH3_N 0.04 12/11/2001 12:37 NH3_N 0.041 11/27/2001 13:00 NH3_N 0.028 10/30/2001 12:10 NH3_N 0.015

9/19/2001 15:26 NH3_N 0.085 8/22/2001 16:20 NH3_N 0.018 7/18/2001 13:10 NH3_N 0.043 6/20/2001 13:10 NH3_N 0.011 5/23/2001 14:15 NH3_N 0.026 4/18/2001 13:05 NH3_N 0.01 U 3/21/2001 12:45 NH3_N 0.01 U 2/28/2001 13:45 NH3_N 0.023 1/24/2001 15:00 NH3_N 0.021 12/6/2000 14:00 NH3_N 0.01 U 11/15/2000 12:50 NH3_N 0.01 U 10/18/2000 12:40 NH3_N 0.032

9/20/2000 13:10 NH3_N 0.01 U 8/23/2000 13:25 NH3_N 0.012 7/19/2000 13:35 NH3_N 0.03 6/21/2000 13:50 NH3_N 0.011 4/23/1997 11:10 PB_DIS 0.15 0.03 2/19/1997 11:40 PB_DIS U 12/17/1996 12:05 PB_DIS 0.037 10/23/1996 11:45 PB_DIS 0.031 0.02 8/21/1996 13:20 PB_DIS U 6/19/1996 13:00 PB_DIS 0.022 4/24/1996 12:55 PB_DIS 0.042 2/21/1996 13:35 PB_DIS 0.031 0.03 12/19/1995 13:20 PB_DIS U 0.03 10/18/1995 13:30 PB_DIS U 0.052 3/20/1995 7:40 PB_DIS J 0.022 1/16/1995 7:50 PB_DIS J 11/14/1994 8:30 PB_DIS 0.208 0.02 9/28/1994 10:50 PB_DIS U 0.02 7/27/1994 11:10 PB_DIS U 0.02 5/25/1994 11:40 PB_DIS U

8/21/2006 10:05 Zn_DIS 1.2 6/19/2006 9:15 Zn_DIS 3.2Permit No.: WA0037168 City of Puyallup WWTP 65 5/17/2000 14:50 NH3_N 0.01 U 2/13/2006 12:14 Zn_DIS 2.7 4/19/2000 14:10 NH3_N 0.01 U 12/12/2005 11:23 Zn_DIS 4.1 3/22/2000 14:20 NH3_N 0.023 10/17/2005 9:55 Zn_DIS 2.2 2/16/2000 14:30 NH3_N 0.01 U 8/20/1997 10:45 ZN_DIS 0.75 1/19/2000 14:40 NH3_N 0.01 U 6/18/1997 11:40 ZN_DIS 0.21 12/8/1999 14:05 NH3_N 0.019 4/23/1997 11:10 ZN_DIS 0.82 11/3/1999 15:10 NH3_N 0.01 U 2/19/1997 11:40 ZN_DIS 0.86 10/20/1999 16:15 NH3_N 0.01 UJ 12/17/1996 12:05 ZN_DIS 1.1

9/22/1999 13:40 NH3_N 0.046 10/23/1996 11:45 ZN_DIS 2.2 J 8/18/1999 13:20 NH3_N 0.051 8/21/1996 13:20 ZN_DIS 0.87 7/21/1999 14:45 NH3_N 0.027 6/19/1996 13:00 ZN_DIS 0.51 6/23/1999 14:35 NH3_N 0.019 4/24/1996 12:55 ZN_DIS 0.56 5/26/1999 13:55 NH3_N 0.031 2/21/1996 13:35 ZN_DIS 1 U 4/21/1999 15:20 NH3_N 0.01 U 12/19/1995 13:20 ZN_DIS 5 U 3/24/1999 14:00 NH3_N 0.022 10/18/1995 13:30 ZN_DIS 1.7 2/17/1999 14:40 NH3_N 0.01 U 3/20/1995 7:40 ZN_DIS 1.6 J 1/20/1999 16:05 NH3_N 0.01 U 1/16/1995 7:50 ZN_DIS 0.44 J 12/16/1998 13:30 NH3_N 0.025 11/14/1994 8:30 ZN_DIS 2.4 J 11/18/1998 15:10 NH3_N 0.039 9/28/1994 10:50 ZN_DIS 1 U 10/21/1998 16:50 NH3_N 0.034 7/27/1994 11:10 ZN_DIS 1 U

9/23/1998 8:20 NH3_N 0.01 U 5/25/1994 11:40 ZN_DIS 2.1 J 8/19/1998 7:20 NH3_N 0.01 U 7/22/1998 7:15 NH3_N 0.033 6/24/1998 7:30 NH3_N 0.01 U 5/20/1998 7:30 NH3_N 0.02Permit No.: WA0037168 City of Puyallup WWTP 66 4/22/1998 7:25 NH3_N 0.027 3/18/1998 8:00 NH3_N 0.01 U 2/19/1998 8:10 NH3_N 0.011 1/21/1998 8:28 NH3_N 0.019 12/17/1997 9:30 NH3_N 0.038 11/19/1997 8:30 NH3_N 0.015 10/22/1997 7:45 NH3_N 0.01 U

9/23/1997 11:05 NH3_N 0.019 8/20/1997 10:45 NH3_N 0.016 7/23/1997 10:55 NH3_N 0.01 U 6/18/1997 11:40 NH3_N 0.01 UJ 5/21/1997 11:05 NH3_N 0.019 4/23/1997 11:10 NH3_N 0.032 3/19/1997 11:15 NH3_N 0.038 2/19/1997 11:40 NH3_N 0.013 1/22/1997 11:25 NH3_N 0.029 12/17/1996 12:05 NH3_N 0.039 11/20/1996 11:15 NH3_N 0.023 10/23/1996 11:45 NH3_N 0.01 U

9/18/1996 13:15 NH3_N 0.01 U 8/21/1996 13:20 NH3_N 0.012 7/24/1996 13:10 NH3_N 0.01 U 6/19/1996 13:00 NH3_N 0.01 U 5/22/1996 13:45 NH3_N 0.013 4/24/1996 12:55 NH3_N 0.036Permit No.: WA0037168 City of Puyallup WWTP 67 3/20/1996 13:30 NH3_N 0.01 U 2/21/1996 13:35 NH3_N 0.01 U 1/24/1996 14:15 NH3_N 0.03 12/19/1995 13:20 NH3_N 0.023 11/21/1995 14:30 NH3_N 0.021 10/18/1995 13:30 NH3_N 0.01 U

9/18/1995 7:25 NH3_N 0.038 8/21/1995 7:40 NH3_N 0.01 U 7/17/1995 8:00 NH3_N 0.015 6/19/1995 7:35 NH3_N 0.023 5/15/1995 7:05 NH3_N 0.027 4/17/1995 7:50 NH3_N 0.015 3/20/1995 7:40 NH3_N 0.01 U 2/20/1995 7:50 NH3_N 0.045 1/16/1995 7:50 NH3_N 0.019 12/19/1994 7:50 NH3_N 0.01 U 11/14/1994 8:30 NH3_N 0.026 10/17/1994 7:40 NH3_N 0.01 U

9/28/1994 10:50 NH3_N 0.024 8/24/1994 10:30 NH3_N 0.01 UJ 7/27/1994 11:10 NH3_N 0.01 U 6/29/1994 10:30 NH3_N 0.053 5/25/1994 11:40 NH3_N 0.01 U 4/27/1994 11:20 NH3_N 0.016 3/30/1994 9:50 NH3_N 0.01Permit No.: WA0037168 City of Puyallup WWTP 68 2/23/1994 10:35 NH3_N 0.039 1/26/1994 12:00 NH3_N 0.039 12/21/1993 12:15 NH3_N 0.033 11/22/1993 14:40 NH3_N 0.1 10/27/1993 11:40 NH3_N 0.017

9/28/1993 13:05 NH3_N 0.019 8/24/1993 12:40 NH3_N 0.017 7/27/1993 11:50 NH3_N 0.018 6/29/1993 12:35 NH3_N 0.037 5/25/1993 11:30 NH3_N 0.033 4/27/1993 12:15 NH3_N 0.03 3/23/1993 11:45 NH3_N 0.045 2/23/1993 11:00 NH3_N 0.027 1/26/1993 12:05 NH3_N 0.067 12/21/1992 12:30 NH3_N 0.059 11/22/1992 13:15 NH3_N 0.039 10/27/1992 12:20 NH3_N 0.019

9/30/1992 9:40 NH3_N 0.02 8/26/1992 9:00 NH3_N 0.04 7/29/1992 9:30 NH3_N 0.04 6/24/1992 8:50 NH3_N 0.03 5/27/1992 9:25 NH3_N 0.01 4/29/1992 9:25 NH3_N 0.03 3/25/1992 9:15 NH3_N 0.03 2/26/1992 9:45 NH3_N 0.02Permit No.: WA0037168 City of Puyallup WWTP 69 1/29/1992 9:20 NH3_N 0.05 12/18/1991 9:10 NH3_N 0.03 11/20/1991 9:30 NH3_N 0.04 10/30/1991 9:50 NH3_N 0.02

9/25/1991 10:40 NH3_N 0.03 8/28/1991 10:55 NH3_N 0.04 7/31/1991 10:10 NH3_N 0.03 6/26/1991 10:25 NH3_N 0.01 U 5/29/1991 12:15 NH3_N 0.01 4/24/1991 11:05 NH3_N 0.02 3/27/1991 10:55 NH3_N 0.03 2/27/1991 10:35 NH3_N 0.02 1/30/1991 13:30 NH3_N 0.03 12/19/1990 13:25 NH3_N 0.03 11/28/1990 13:50 NH3_N 0.02 10/31/1990 13:25 NH3_N 0.03

9/26/1990 11:20 NH3_N 0.01 8/29/1990 11:45 NH3_N 0.03 7/31/1990 11:50 NH3_N 0.04 6/27/1990 10:35 NH3_N 0.02 5/31/1990 10:45 NH3_N 0.03 4/25/1990 11:35 NH3_N 0.02 3/28/1990 13:40 NH3_N 0.02 2/28/1990 10:25 NH3_N 0.03 1/31/1990 11:10 NH3_N 0.06Permit No.: WA0037168 City of Puyallup WWTP 70 EFFLUENT DATA Note on units: Metals are in ug/L. Ammonia, BOD5, and TSS are in mg/L. Temperature is in degrees Celsius. pH is in standard units. Fecal coliform is in cfu/100mL.

TEST DATE MCMN MCAV MCMX AMMONIA, TOTAL 08/31/2003 1.2 3.9 AMMONIA, TOTAL 09/30/2003 0.8 2.3 AMMONIA, TOTAL 10/31/2003 0.6 2.2 AMMONIA, TOTAL 11/30/2003 0.6 2.6 AMMONIA, TOTAL 12/31/2003 0.5 1.1 AMMONIA, TOTAL 01/31/2004 0.9 2.7 AMMONIA, TOTAL 02/29/2004 2.3 9.3 AMMONIA, TOTAL 03/31/2004 0.5 1.0 AMMONIA, TOTAL 04/30/2004 0.4 0.6 AMMONIA, TOTAL 05/31/2004 0.5 0.7 AMMONIA, TOTAL 06/30/2004 0.3 0.4 AMMONIA, TOTAL 07/31/2004 0.4 1.3 AMMONIA, TOTAL 08/31/2004 1.0 2.5 AMMONIA, TOTAL 09/30/2004 0.5 0.8 AMMONIA, TOTAL 10/31/2004 0.2 0.4 AMMONIA, TOTAL 11/30/2004 0.2 0.5 AMMONIA, TOTAL 12/31/2004 0.2 0.4 AMMONIA, TOTAL 01/31/2005 0.2 0.8 AMMONIA, TOTAL 02/28/2005 0.2 0.5 AMMONIA, TOTAL 03/31/2005 0.3 0.6Permit No.: WA0037168 City of Puyallup WWTP 71

AMMONIA, TOTAL 04/30/2005 0.2 0.6 AMMONIA, TOTAL 05/31/2005 0.2 0.4 AMMONIA, TOTAL 06/30/2005 0.3 0.7 AMMONIA, TOTAL 07/31/2005 0.6 1.6 AMMONIA, TOTAL 08/31/2005 0.2 0.5 AMMONIA, TOTAL 09/30/2005 0.5 2.1 AMMONIA, TOTAL 10/31/2005 0.2 0.5 AMMONIA, TOTAL 11/30/2005 0.2 0.3 AMMONIA, TOTAL 12/31/2005 0.1 0.2 AMMONIA, TOTAL 01/31/2006 0.4 1.8 AMMONIA, TOTAL 02/28/2006 0.1 0.3 AMMONIA, TOTAL 03/31/2006 0.1 0.3 AMMONIA, TOTAL 04/30/2006 0.2 0.3 AMMONIA, TOTAL 05/31/2006 0.2 0.5 AMMONIA, TOTAL 06/30/2006 5.0 6.0 AMMONIA, TOTAL 07/31/2006 0.9 2.0 AMMONIA, TOTAL 08/31/2006 0.4 0.9 AMMONIA, TOTAL 09/30/2006 0.7 2.3 AMMONIA, TOTAL 10/31/2006 0.1 0.2 AMMONIA, TOTAL 11/30/2006 0.7 1.2 AMMONIA, TOTAL 12/31/2006 0.3 0.8 AMMONIA, TOTAL 01/31/2007 1.1 3.9 AMMONIA, TOTAL 02/28/2007 0.1 0.3 AMMONIA, TOTAL 03/31/2007 0.4 1.1Permit No.: WA0037168 City of Puyallup WWTP 72

AMMONIA, TOTAL 04/30/2007 0.2 0.9 AMMONIA, TOTAL 05/31/2007 0.1 0.1 AMMONIA, TOTAL 06/30/2007 0.1 0.1 AMMONIA, TOTAL 07/31/2007 0.5 1.4 AMMONIA, TOTAL 08/31/2007 0.4 1.1 AMMONIA, TOTAL 09/30/2007 0.5 0.9 AMMONIA, TOTAL 10/31/2007 0.4 1.6 AMMONIA, TOTAL 11/30/2007 0.1 0.2 AMMONIA, TOTAL 12/31/2007 0.3 0.6 AMMONIA, TOTAL 01/31/2008 0.1 0.2 AMMONIA, TOTAL 02/29/2008 0.1 0.0 AMMONIA, TOTAL 03/31/2008 0.1 0.1 AMMONIA, TOTAL 04/30/2008 0.1 0.1 AMMONIA, TOTAL 05/31/2008 0.1 0.1 AMMONIA, TOTAL 06/30/2008 0.1 0.2 AMMONIA, TOTAL 07/31/2008 0.6 1.5 AMMONIA, TOTAL 08/31/2008 0.5 1.3 AMMONIA, TOTAL 09/30/2008 0.3 0.8 AMMONIA, TOTAL 10/31/2008 0.1 0.2 AMMONIA, TOTAL 11/30/2008 0.1 0.2 AMMONIA, TOTAL 12/31/2008 0.2 0.4 AMMONIA, TOTAL 1/31/2009 1.8 4.3 AMMONIA, TOTAL 2/28/2009 0.6 1.7 AMMONIA, TOTAL 3/31/2009 0.1 0.2Permit No.: WA0037168 City of Puyallup WWTP 73

AMMONIA, TOTAL 4/30/2009 0.1 0.1 AMMONIA, TOTAL 5/31/2009 0.1 0.1 AMMONIA, TOTAL 6/30/2009 0.1 0.1 AMMONIA, TOTAL 7/31/2009 0.1 0.3 AMMONIA, TOTAL 8/31/2009 0.5 1.8 AMMONIA, TOTAL 9/30/2009 0.9 2.9 AMMONIA, TOTAL 10/13/2009 0.9 2.9 AMMONIA, TOTAL 10/31/2009 0.4 1.0 AMMONIA, TOTAL 11/30/2009 0.1 0.3 AMMONIA, TOTAL 12/31/2009 0.1 0.1 AMMONIA, TOTAL 1/31/2010 0.1 0.3 AMMONIA, TOTAL 2/28/2010 0.1 0.1 AMMONIA, TOTAL 3/31/2010 0.1 0.1 AMMONIA, TOTAL 4/30/2010 0.1 0.1 AMMONIA, TOTAL 5/31/2010 0.1 0.2 AMMONIA, TOTAL 6/30/2010 0.1 0.1 AMMONIA, TOTAL 7/31/2010 0.2 0.7 AMMONIA, TOTAL 8/31/2010 0.3 1.8 AMMONIA, TOTAL 9/30/2010 0.1 0.2 AMMONIA, TOTAL 10/31/2010 0.1 0.4 AMMONIA, TOTAL 11/30/2010 0.1 0.3 AMMONIA, TOTAL 12/31/2010 0.2 0.4 AMMONIA, TOTAL 1/31/2011 0.1 0.2 AMMONIA, TOTAL 2/28/2011 0.1 0.1Permit No.: WA0037168 City of Puyallup WWTP 74

AMMONIA, TOTAL 3/31/2011 0.1 0.1 AMMONIA, TOTAL 4/30/2011 0.1 0.2 AMMONIA, TOTAL 5/31/2011 0.6 2.2 AMMONIA, TOTAL 6/30/2011 2.7 7.3 AMMONIA, TOTAL 7/31/2011 0.1 0.3 AMMONIA, TOTAL 8/31/2011 0.1 0.2 AMMONIA, TOTAL 9/30/2011 0.2 0.4 AMMONIA, TOTAL 10/31/2011 0.3 0.6 AMMONIA, TOTAL 11/30/2011 0.1 0.3 AMMONIA, TOTAL 12/31/2011 0.3 0.7 BOD5 08/31/2003 6.4 4.3 BOD5 09/30/2003 5.7 4.0 BOD5 10/31/2003 7.4 4.0 BOD5 11/30/2003 5.0 4.2 BOD5 12/31/2003 6.2 4.5 BOD5 01/31/2004 7.4 5.9 BOD5 02/29/2004 8.7 6.5 BOD5 03/31/2004 7.6 6.4 BOD5 04/30/2004 7.5 4.8 BOD5 05/31/2004 5.7 4.4 BOD5 06/30/2004 3.8 2.5 BOD5 08/31/2004 9.0 6.0 BOD5 09/30/2004 6.5 4.7 BOD5 10/31/2004 4.3 2.5Permit No.: WA0037168 City of Puyallup WWTP 75

BOD5 11/30/2004 2.8 2.4 BOD5 12/31/2004 2.9 2.6 BOD5 01/31/2005 5.4 3.3 BOD5 02/28/2005 2.7 2.5 BOD5 03/31/2005 4.4 3.8 BOD5 04/30/2005 2.5 2.3 BOD5 05/31/2005 2.8 2.2 BOD5 06/30/2005 3.9 2.5 BOD5 07/31/2005 4.9 3.6 BOD5 08/31/2005 3.0 2.2 BOD5 09/30/2005 4.7 3.7 BOD5 10/31/2005 5.8 4.2 BOD5 11/30/2005 6.3 5.5 BOD5 12/31/2005 2.8 2.5 BOD5 01/31/2006 6.7 5.0 BOD5 02/28/2006 5.7 3.5 BOD5 03/31/2006 3.5 2.9 BOD5 04/30/2006 4.0 2.7 BOD5 05/31/2006 3.0 3.0 BOD5 06/30/2006 4.0 5.0 BOD5 07/31/2006 7.0 5.6 BOD5 08/31/2006 3.5 3.0 BOD5 09/30/2006 5.3 3.6 BOD5 10/31/2006 4.7 3.5Permit No.: WA0037168 City of Puyallup WWTP 76

BOD5 11/30/2006 3.2 4.9 BOD5 12/31/2006 4.5 6.4 BOD5 01/31/2007 6.3 16.0 BOD5 02/28/2007 4.7 7.1 BOD5 03/31/2007 7.5 5.5 BOD5 04/30/2007 3.2 3.5 BOD5 05/31/2007 2.7 1.9 BOD5 06/30/2007 2.0 2.5 BOD5 07/31/2007 3.3 2.9 BOD5 08/31/2007 2.9 3.5 BOD5 09/30/2007 3.4 4.3 BOD5 10/31/2007 3.8 5.3 BOD5 11/30/2007 3.8 4.4 BOD5 12/31/2007 4.8 7.0 BOD5 01/31/2008 4.2 4.7 BOD5 02/29/2008 4.5 5.5 BOD5 03/31/2008 3.4 3.8 BOD5 10/31/2008 2.5 3.0 BOD5 11/30/2008 2.9 3.3 BOD5 12/31/2008 3.7 5.0 BOD5 1/31/2009 5.3 6.5 BOD5 3/31/2009 3.3 3.7 BOD5 1/31/2010 4.6 5.8 BOD5 2/28/2010 2.7 3.1Permit No.: WA0037168 City of Puyallup WWTP 77

BOD5 3/31/2010 2.5 3.4 BOD5 4/30/2010 3.5 4.0 BOD5 5/31/2010 3.4 4.2 BOD5 6/30/2010 2.5 2.7 BOD5 7/31/2010 2.7 3.7 BOD5 8/31/2010 2.6 3.5 BOD5 9/30/2010 2.9 3.4 BOD5 10/31/2010 3.1 3.8 BOD5 11/30/2010 3.7 4.0 BOD5 12/31/2010 3.9 4.9 BOD5 1/31/2011 4.0 5.1 BOD5 2/28/2011 3.4 3.7 BOD5 3/31/2011 3.5 4.2 BOD5 4/30/2011 4.0 4.8 BOD5 5/31/2011 3.5 5.9 BOD5 6/30/2011 3.5 4.6 BOD5 7/31/2011 2.7 3.1 BOD5 8/31/2011 2.2 2.6 BOD5 9/30/2011 2.4 2.9 BOD5 10/31/2011 4.5 6.4 BOD5 11/30/2011 3.7 4.5 BOD5 12/31/2011 3.0 3.2 BOD5, % REMOVAL 08/31/2003 99.0 BOD5, % REMOVAL 09/30/2003 99.0Permit No.: WA0037168 City of Puyallup WWTP 78

BOD5, % REMOVAL 10/31/2003 98.0 BOD5, % REMOVAL 11/30/2003 99.0 BOD5, % REMOVAL 12/31/2003 96.0 BOD5, % REMOVAL 01/31/2004 97.0 BOD5, % REMOVAL 02/29/2004 98.0 BOD5, % REMOVAL 03/31/2004 98.0 BOD5, % REMOVAL 04/30/2004 98.0 BOD5, % REMOVAL 05/31/2004 99.0 BOD5, % REMOVAL 06/30/2004 99.0 BOD5, % REMOVAL 07/31/2004 99.0 BOD5, % REMOVAL 08/31/2004 98.0 BOD5, % REMOVAL 09/30/2004 99.0 BOD5, % REMOVAL 10/31/2004 99.0 BOD5, % REMOVAL 11/30/2004 99.0 BOD5, % REMOVAL 12/31/2004 99.0 BOD5, % REMOVAL 01/31/2005 99.0 BOD5, % REMOVAL 02/28/2005 99.0 BOD5, % REMOVAL 04/30/2005 99.0 BOD5, % REMOVAL 05/31/2005 99.0 BOD5, % REMOVAL 06/30/2005 99.0 BOD5, % REMOVAL 07/31/2005 99.0 BOD5, % REMOVAL 08/31/2005 99.0 BOD5, % REMOVAL 09/30/2005 99.0 BOD5, % REMOVAL 10/31/2005 99.0Permit No.: WA0037168 City of Puyallup WWTP 79

BOD5, % REMOVAL 11/30/2005 98.0 BOD5, % REMOVAL 12/31/2005 99.0 BOD5, % REMOVAL 01/31/2006 94.0 BOD5, % REMOVAL 02/28/2006 98.0 BOD5, % REMOVAL 03/31/2006 97.0 BOD5, % REMOVAL 04/30/2006 99.0 BOD5, % REMOVAL 05/31/2006 98.0 BOD5, % REMOVAL 06/30/2006 98.0 BOD5, % REMOVAL 07/31/2006 98.0 BOD5, % REMOVAL 08/31/2006 99.0 BOD5, % REMOVAL 09/30/2006 98.1 BOD5, % REMOVAL 10/31/2006 98.6 BOD5, % REMOVAL 11/30/2006 96.0 BOD5, % REMOVAL 12/31/2006 94.4 BOD5, % REMOVAL 01/31/2007 95.0 BOD5, % REMOVAL 02/28/2007 97.4 BOD5, % REMOVAL 03/31/2007 96.6 BOD5, % REMOVAL 04/30/2007 98.5 BOD5, % REMOVAL 05/31/2007 99.3 BOD5, % REMOVAL 06/30/2007 99.3 BOD5, % REMOVAL 07/31/2007 99.0 BOD5, % REMOVAL 08/31/2007 99.0 BOD5, % REMOVAL 09/30/2007 99.0 BOD5, % REMOVAL 10/31/2007 98.5Permit No.: WA0037168 City of Puyallup WWTP 80

BOD5, % REMOVAL 11/30/2007 98.0 BOD5, % REMOVAL 12/31/2007 92.7 BOD5, % REMOVAL 01/31/2008 97.1 BOD5, % REMOVAL 02/29/2008 97.6 BOD5, % REMOVAL 03/31/2008 98.3 BOD5, % REMOVAL 04/30/2008 98.4 BOD5, % REMOVAL 05/31/2008 99.0 BOD5, % REMOVAL 06/30/2008 99.0 BOD5, % REMOVAL 07/31/2008 98.9 BOD5, % REMOVAL 08/31/2008 99.2 BOD5, % REMOVAL 09/30/2008 99.3 BOD5, % REMOVAL 10/31/2008 99.2 BOD5, % REMOVAL 11/30/2008 98.6 BOD5, % REMOVAL 12/31/2008 98.6 BOD5, % REMOVAL 1/31/2009 96.9 BOD5, % REMOVAL 2/28/2009 98.2 BOD5, % REMOVAL 3/31/2009 98.2 BOD5, % REMOVAL 3/31/2009 98.2 BOD5, % REMOVAL 4/30/2009 98.2 BOD5, % REMOVAL 5/31/2009 98.9 BOD5, % REMOVAL 6/30/2009 99.3 BOD5, % REMOVAL 7/31/2009 99.2 BOD5, % REMOVAL 8/31/2009 98.8 BOD5, % REMOVAL 9/30/2009 98.8Permit No.: WA0037168 City of Puyallup WWTP 81

BOD5, % REMOVAL 10/13/2009 98.8 BOD5, % REMOVAL 10/31/2009 99.1 BOD5, % REMOVAL 11/30/2009 98.6 BOD5, % REMOVAL 12/31/2009 98.5 BOD5, % REMOVAL 1/31/2010 96.8 BOD5, % REMOVAL 1/31/2010 96.8 BOD5, % REMOVAL 2/28/2010 98.6 BOD5, % REMOVAL 2/28/2010 98.6 BOD5, % REMOVAL 3/31/2010 98.6 BOD5, % REMOVAL 4/30/2010 98.3 BOD5, % REMOVAL 5/31/2010 98.7 BOD5, % REMOVAL 5/31/2010 98.3 BOD5, % REMOVAL 6/30/2010 99.0 BOD5, % REMOVAL 6/30/2010 98.9 BOD5, % REMOVAL 7/31/2010 99.1 BOD5, % REMOVAL 8/31/2010 99.1 BOD5, % REMOVAL 9/30/2010 99.1 BOD5, % REMOVAL 10/31/2010 99.9 BOD5, % REMOVAL 11/30/2010 98.1 BOD5, % REMOVAL 12/31/2010 97.4 BOD5, % REMOVAL 1/31/2011 97.8 BOD5, % REMOVAL 2/28/2011 98.2 BOD5, % REMOVAL 3/31/2011 97.6 BOD5, % REMOVAL 4/30/2011 97.3Permit No.: WA0037168 City of Puyallup WWTP 82

BOD5, % REMOVAL 5/31/2011 97.9 BOD5, % REMOVAL 6/30/2011 98.5 BOD5, % REMOVAL 7/31/2011 99.0 BOD5, % REMOVAL 8/31/2011 99.2 BOD5, % REMOVAL 9/30/2011 99.2 BOD5, % REMOVAL 10/31/2011 98.3 BOD5, % REMOVAL 11/30/2011 98.4 BOD5, % REMOVAL 12/31/2011 98.9 COPPER (total recoverable) 08/31/2003 7.2 7.2 COPPER (total recoverable) 09/30/2003 11. 11. COPPER (total recoverable) 10/31/2003 10.6 10.6 COPPER (total recoverable) 11/30/2003 9.8 9.8 COPPER (total recoverable) 12/31/2003 10.7 10.5 COPPER (total recoverable) 01/31/2004 12. 12. COPPER (total recoverable) 02/29/2004 9.7 9.7 COPPER (total recoverable) 03/31/2004 8.1 8.1 COPPER (total recoverable) 04/30/2004 10.9 10.7 COPPER (total recoverable) 05/31/2004 10.8 10.8 COPPER (total recoverable) 06/30/2004 13.4 13.4 COPPER (total recoverable) 07/31/2004 10.5 6.1 COPPER (total recoverable) 08/31/2004 11.8 11.8 COPPER (total recoverable) 09/30/2004

. . COPPER (total recoverable) 10/31/2004 12.2 12.2 COPPER (total recoverable) 11/30/2004 15.3 14.9Permit No.: WA0037168 City of Puyallup WWTP 83

COPPER (total recoverable) 12/31/2004 13.4 13.4 COPPER (total recoverable) 01/31/2005 13.8 13.8 COPPER (total recoverable) 02/28/2005 12.3 12.3 COPPER (total recoverable) 03/31/2005 15.2 15.1 COPPER (total recoverable) 04/30/2005 12. 12. COPPER (total recoverable) 05/31/2005 9.6 9.6 COPPER (total recoverable) 06/30/2005 12.5 12.5 COPPER (total recoverable) 07/31/2005 22.3 22.3 COPPER (total recoverable) 08/31/2005 16.3 16.3 COPPER (total recoverable) 09/30/2005 17.4 17.4 COPPER (total recoverable) 10/31/2005 18.5 18.5 COPPER (total recoverable) 11/30/2005

. . COPPER (total recoverable) 12/31/2005 15.6 15.6 COPPER (total recoverable) 01/31/2006 10.1 10.1 COPPER (total recoverable) 02/28/2006 14.7 13.1 COPPER (total recoverable) 03/31/2006 14.4 13.2 COPPER (total recoverable) 04/30/2006 14.8 14.2 COPPER (total recoverable) 05/31/2006 17.1 16.4 COPPER (total recoverable) 06/30/2006 18.4 18.4 COPPER (total recoverable) 07/31/2006 20.9 20.9 COPPER (total recoverable) 08/31/2006 14.6 14.6 COPPER (total recoverable) 09/30/2006 13.8 13.8 COPPER (total recoverable) 10/31/2006 14.9 14.9 COPPER (total recoverable) 11/30/2006 17.9 17.9Permit No.: WA0037168 City of Puyallup WWTP 84

COPPER (total recoverable) 12/31/2006 12.4 12.4 COPPER (total recoverable) 01/31/2007 9. 9. COPPER (total recoverable) 02/28/2007 15.5 15.5 COPPER (total recoverable) 03/31/2007 12.4 11.7 COPPER (total recoverable) 04/30/2007 12.7 12.7 COPPER (total recoverable) 05/31/2007 4.5 4.5 COPPER (total recoverable) 06/30/2007 3.7 3.7 COPPER (total recoverable) 07/31/2007 3.6 3. COPPER (total recoverable) 08/31/2007 3.1 3.1 COPPER (total recoverable) 09/30/2007 5.5 5.5 COPPER (total recoverable) 10/31/2007 7.7 6.5 COPPER (total recoverable) 11/30/2007 4.2 4.2 COPPER (total recoverable) 12/31/2007 6. 6. COPPER (total recoverable) 01/31/2008 3.9 3.9 COPPER (total recoverable) 02/29/2008 4.3 4.3 COPPER (total recoverable) 03/31/2008 7.1 5.2 COPPER (total recoverable) 08/31/2003 7.2 7.2 COPPER (total recoverable) 09/30/2003 11. 11. COPPER (total recoverable) 10/31/2003 10.6 10.6 COPPER (total recoverable) 11/30/2003 9.8 9.8 COPPER (total recoverable) 12/31/2003 10.7 10.5 COPPER (total recoverable) 01/31/2004 12. 12. COPPER (total recoverable) 02/29/2004 9.7 9.7 COPPER (total recoverable) 03/31/2004 8.1 8.1Permit No.: WA0037168 City of Puyallup WWTP 85

COPPER (total recoverable) 04/30/2004 10.9 10.7 COPPER (total recoverable) 05/31/2004 10.8 10.8 COPPER (total recoverable) 06/30/2004 13.4 13.4 COPPER (total recoverable) 07/31/2004 10.5 6.1 COPPER (total recoverable) 08/31/2004 11.8 11.8 COPPER (total recoverable) 09/30/2004

. . COPPER (total recoverable) 10/31/2004 12.2 12.2 COPPER (total recoverable) 11/30/2004 15.3 14.9 COPPER (total recoverable) 12/31/2004 13.4 13.4 COPPER (total recoverable) 01/31/2005 13.8 13.8 COPPER (total recoverable) 02/28/2005 12.3 12.3 COPPER (total recoverable) 03/31/2005 15.2 15.1 COPPER (total recoverable) 04/30/2005 12. 12. COPPER (total recoverable) 05/31/2005 9.6 9.6 COPPER (total recoverable) 06/30/2005 12.5 12.5 COPPER (total recoverable) 07/31/2005 22.3 22.3 COPPER (total recoverable) 08/31/2005 16.3 16.3 COPPER (total recoverable) 09/30/2005 17.4 17.4 COPPER (total recoverable) 10/31/2005 18.5 18.5 COPPER (total recoverable) 11/30/2005

. . COPPER (total recoverable) 12/31/2005 15.6 15.6 COPPER (total recoverable) 01/31/2006 10.1 10.1 COPPER (total recoverable) 02/28/2006 14.7 13.1 COPPER (total recoverable) 03/31/2006 14.4 13.2Permit No.: WA0037168 City of Puyallup WWTP 86

COPPER (total recoverable) 04/30/2006 14.8 14.2 COPPER (total recoverable) 05/31/2006 17.1 16.4 COPPER (total recoverable) 06/30/2006 18.4 18.4 COPPER (total recoverable) 07/31/2006 20.9 20.9 COPPER (total recoverable) 08/31/2006 14.6 14.6 COPPER (total recoverable) 09/30/2006 13.8 13.8 COPPER (total recoverable) 10/31/2006 14.9 14.9 COPPER (total recoverable) 11/30/2006 17.9 17.9 COPPER (total recoverable) 12/31/2006 12.4 12.4 COPPER (total recoverable) 01/31/2007 9. 9. COPPER (total recoverable) 02/28/2007 15.5 15.5 COPPER (total recoverable) 03/31/2007 12.4 11.7 COPPER (total recoverable) 04/30/2007 12.7 12.7 COPPER (total recoverable) 05/31/2007 4.5 4.5 COPPER (total recoverable) 06/30/2007 3.7 3.7 COPPER (total recoverable) 07/31/2007 3.6 3. COPPER (total recoverable) 08/31/2007 3.1 3.1 COPPER (total recoverable) 09/30/2007 5.5 5.5 COPPER (total recoverable) 10/31/2007 7.7 6.5 COPPER (total recoverable) 11/30/2007 4.2 4.2 COPPER (total recoverable) 12/31/2007 6. 6. COPPER (total recoverable) 01/31/2008 3.9 3.9 COPPER (total recoverable) 02/29/2008 4.3 4.3 COPPER (total recoverable) 03/31/2008 7.1 5.2Permit No.: WA0037168 City of Puyallup WWTP 87

COPPER (total recovera ble) 04/30/2008 2.8 2.8 COPPER (total recovera ble) 05/31/2008 2.6 2.6 COPPER (total recovera ble) 06/30/2008 2.9 2.9 COPPER (total recovera ble) 07/31/2008 3.4 3.4 COPPER (total recovera ble) 08/31/2008 2.8 2.8 COPPER (total recovera ble) 09/30/2008 2.9 2.9 COPPER (total recovera ble) 10/31/2008 2.8 2.8 COPPER (total recovera ble) 11/30/2008 4.1 4.1 COPPER (total recovera ble) 12/31/2008 4.2 4.2 COPPER (total recovera ble) 01/31/2009 4.3 4.3 COPPER (total recovera ble) 02/28/2009 3.2 3.2 COPPER (total recovera ble) 03/31/2009 2.8 2,8 COPPER (total recovera ble) 04/31/2009 3.7 3.7 COPPER (total recovera ble) 05/31/2009 4.4 4.4 COPPER (total recovera ble) 06/30/2009 3.9 3.9 COPPER (total recovera ble) 07/31/2009 2.6 2.6 COPPER (total recovera ble) 08/31/2009 3.8 3.8 COPPER (total recovera ble) 09/30/2009 4.2 4.2 COPPER (total recovera ble) 10/31/2009 7.7 7.7 COPPER (total recovera ble) 11/30/2009 3.4 3.4 COPPER (total recovera ble) 01/31/2010 5 5 COPPER (total recovera ble) 01/31/2010 7.7 7.7 COPPER (total recovera ble) 02/28/2010 5 5 COPPER (total recovera ble) 03/31/2010 4.9 4.9Permit No.: WA0037168 City of Puyallup WWTP 88

COPPER (total recovera ble) 04/30/2010 7.5 7.5 COPPER (total recovera ble) 05/31/2010 4.4 4.4 COPPER (total recovera ble) 06/30/2010 2.7 2.7 COPPER (total recovera ble) 07/31/2010 3.1 3.1 COPPER (total recovera ble) 08/31/2010 3.8 3.8 COPPER (total recovera ble) 09/30/2010 4.2 4.2 COPPER (total recovera ble) 10/31/2010 5.2 5.2 COPPER (total recovera ble) 11/30/2010 6.4 6.4 COPPER (total recovera ble) 12/31/2010 4.9 4.9 COPPER (total recovera ble) 01/31/2011 4.9 4.9 COPPER (total recovera ble) 02/28/2011 4.4 4.4 COPPER (total recovera ble) 03/31/2011 4.8 4.8 COPPER (total recovera ble) 04/30/2011 8.1 8.1 COPPER (total recovera ble) 05/31/2011 6.4 6.4 COPPER (total recovera ble) 06/30/2011 6.3 6.3 COPPER (total recovera ble) 07/31/2011 4 4 COPPER (total recovera ble) 08/31/2011 4 4 COPPER (total recovera ble) 09/30/2011 3.5 3.5 COPPER (total recovera ble) 10/31/2011 6.7 6.7 COPPER (total recovera ble) 11/30/2011 6.1 6.1 COPPER (total recovera ble) 12/31/2011 5.4 5.4 COPPER (total recovera ble) 01/31/2012 5.9 5.9 COPPER (total recovera ble) 02/29/2012 6.1 6.1 COPPER (total recovera ble) 03/31/2012 5.9 5.9Permit No.: WA0037168 City of Puyallup WWTP 89

COPPER (total recovera ble) 04/30/2012 4.8 4.8 COPPER (total recovera ble) 05/31/2012 5 5 COPPER (total recovera ble) 06/30/2012 3.4 3.4 COPPER (total recovera ble) 07/31/2012 5.9 5.9 COPPER (total recovera ble) 08/31/2012 5.2 5.2 COPPER (total recovera ble) 09/30/2012 5.2 5.2 COPPER (total recovera ble) 10/31/2012 4.8 4.8 COPPER (total recovera ble) 11/30/2012 4.3 4.3 COPPER (total recovera ble) 12/31/2012 5.6 5.6 COPPER (total recovera ble) 01/31/2013 6 6 COPPER (total recovera ble) 02/28/2013 5.9 5.9 COPPER (total recovera ble) 03/31/2013 6.9 6.9Permit No.: WA0037168 City of Puyallup WWTP 90

FECAL COLIFORM 08/31/2003 53.0 FECAL COLIFORM 09/30/2003 54.0 FECAL COLIFORM 10/31/2003 25.0 FECAL COLIFORM 11/30/2003 14.0 FECAL COLIFORM 12/31/2003 32.0 FECAL COLIFORM 01/31/2004 8.0 FECAL COLIFORM 02/29/2004 9.0 FECAL COLIFORM 03/31/2004 13.0 FECAL COLIFORM 04/30/2004 10.0 FECAL COLIFORM 05/31/2004 25.0 FECAL COLIFORM 06/30/2004 9.0 FECAL COLIFORM 07/31/2004 20.0 FECAL COLIFORM 08/31/2004 47.0 FECAL COLIFORM 09/30/2004 8.0 FECAL COLIFORM 10/31/2004 5.0 FECAL COLIFORM 11/30/2004 8.0 FECAL COLIFORM 12/31/2004 3.0 FECAL COLIFORM 01/31/2005 11.0 FECAL COLIFORM 02/28/2005 2.0 FECAL COLIFORM 03/31/2005 6.0 FECAL COLIFORM 04/30/2005 6.0 FECAL COLIFORM 05/31/2005 6.0 FECAL COLIFORM 06/30/2005 4.0Permit No.: WA0037168 City of Puyallup WWTP 91

FECAL COLIFORM 07/31/2005 9.0 FECAL COLIFORM 08/31/2005 9.0 FECAL COLIFORM 09/30/2005 31.0 FECAL COLIFORM 10/31/2005 55.0 FECAL COLIFORM 11/30/2005 18.0 FECAL COLIFORM 12/31/2005 6.0 FECAL COLIFORM 01/31/2006 8.0 FECAL COLIFORM 02/28/2006 9.0 FECAL COLIFORM 03/31/2006 9.0 FECAL COLIFORM 04/30/2006 2.0 FECAL COLIFORM 05/31/2006 5.0 FECAL COLIFORM 06/30/2006 19.0 FECAL COLIFORM 07/31/2006 21.0 FECAL COLIFORM 08/31/2006 9.0 FECAL COLIFORM 09/30/2006 12.0 FECAL COLIFORM 10/31/2006 4.0 FECAL COLIFORM 11/30/2006 4.3 FECAL COLIFORM 12/31/2006 10.3 FECAL COLIFORM 01/31/2007 4.7 FECAL COLIFORM 02/28/2007 6.3 FECAL COLIFORM 03/31/2007 0.0 FECAL COLIFORM 04/30/2007 7.9 FECAL COLIFORM 05/31/2007 6.5 FECAL COLIFORM 06/30/2007 10.6Permit No.: WA0037168 City of Puyallup WWTP 92

FECAL COLIFORM 07/31/2007 18.9 FECAL COLIFORM 08/31/2007 9.9 FECAL COLIFORM 09/30/2007 7.4 FECAL COLIFORM 10/31/2007 3.2 FECAL COLIFORM 11/30/2007 0.0 FECAL COLIFORM 12/31/2007 0.0 FECAL COLIFORM 01/31/2008 0.0 FECAL COLIFORM 02/29/2008 4.4 FECAL COLIFORM 03/31/2008 2.5 FECAL COLIFORM 04/30/2008 2.9 FECAL COLIFORM 05/31/2008 3.2 FECAL COLIFORM 06/30/2008 3.2 FECAL COLIFORM 07/31/2008 2.9 FECAL COLIFORM 08/31/2008 3.6 FECAL COLIFORM 09/30/2008 4.6 FECAL COLIFORM 10/31/2008 7.6 FECAL COLIFORM 11/30/2008 3.6 FECAL COLIFORM 12/31/2008 2.7 FECAL COLIFORM 1/31/2009 12.8 FECAL COLIFORM 2/28/2009 6.0 FECAL COLIFORM 3/31/2009 2.6 FECAL COLIFORM 4/30/2009 3.9 FECAL COLIFORM 5/31/2009 4.0 FECAL COLIFORM 6/30/2009 12.0Permit No.: WA0037168 City of Puyallup WWTP 93

FECAL COLIFORM 7/31/2009 14.8 FECAL COLIFORM 8/31/2009 18.2 FECAL COLIFORM 9/30/2009 4.0 FECAL COLIFORM 10/13/2009 4.0 FECAL COLIFORM 10/31/2009 3.1 FECAL COLIFORM 11/30/2009 5.0 FECAL COLIFORM 12/31/2009 6.4 FECAL COLIFORM 1/31/2010 11.1 FECAL COLIFORM 2/28/2010 3.2 FECAL COLIFORM 3/31/2010 5.7 FECAL COLIFORM 4/30/2010 7.4 FECAL COLIFORM 5/31/2010 38.7 FECAL COLIFORM 6/30/2010 14.5 FECAL COLIFORM 7/31/2010 5.7 FECAL COLIFORM 8/31/2010 9.5 FECAL COLIFORM 9/30/2010 10.0 FECAL COLIFORM 10/31/2010 8.6 FECAL COLIFORM 11/30/2010 56.8 FECAL COLIFORM 12/31/2010 40.4 FECAL COLIFORM 1/31/2011 12.1 FECAL COLIFORM 2/28/2011 33.1 FECAL COLIFORM 3/31/2011 8.9 FECAL COLIFORM 4/30/2011 15.3 FECAL COLIFORM 5/31/2011 11.2Permit No.: WA0037168 City of Puyallup WWTP 94

FECAL COLIFORM 6/30/2011 20.2 FECAL COLIFORM 7/31/2011 8.8 FECAL COLIFORM 8/31/2011 13.3 FECAL COLIFORM 9/30/2011 18.4 FECAL COLIFORM 10/31/2011 18.7 FECAL COLIFORM 11/30/2011 28.8 FECAL COLIFORM 12/31/2011 4.1 LEAD (total recoverable) 08/31/2003 0.6 0.6 LEAD (total recoverable) 09/30/2003 0.6 0.6 LEAD (total recoverable) 10/31/2003 0.8 0.8 LEAD (total recoverable) 11/30/2003 0.5 0.5 LEAD (total recoverable) 12/31/2003 0.4 0.4 LEAD (total recoverable) 01/31/2004 0.3 0.3 LEAD (total recoverable) 02/29/2004 0.3 0.3 LEAD (total recoverable) 03/31/2004 0.3 0.3 LEAD (total recoverable) 04/30/2004 0.3 0.3 LEAD (total recoverable) 05/31/2004 0.5 0.5 LEAD (total recoverable) 06/30/2004 0.2 0.2 LEAD (total recoverable) 07/31/2004 0.3 0.3 LEAD (total recoverable) 08/31/2004 0.3 0.3 LEAD (total recoverable) 09/30/2004 0.0 0.0 LEAD (total recoverable) 10/31/2004 0.3 0.3 LEAD (total recoverable) 11/30/2004 0.4 0.4 LEAD (total recoverable) 12/31/2004 0.2 0.2Permit No.: WA0037168 City of Puyallup WWTP 95

LEAD (total recoverable) 01/31/2005 0.2 0.2 LEAD (total recoverable) 02/28/2005 0.2 0.2 LEAD (total recoverable) 03/31/2005 0.3 0.3 LEAD (total recoverable) 04/30/2005 0.3 0.3 LEAD (total recoverable) 05/31/2005 0.2 0.2 LEAD (total recoverable) 06/30/2005 0.3 0.3 LEAD (total recoverable) 07/31/2005 0.6 0.6 LEAD (total recoverable) 08/31/2005 0.5 0.5 LEAD (total recoverable) 09/30/2005 0.4 0.4 LEAD (total recoverable) 10/31/2005 0.5 0.5 LEAD (total recoverable) 11/30/2005 0.0 0.0 LEAD (total recoverable) 12/31/2005 0.3 0.3 LEAD (total recoverable) 01/31/2006 0.2 0.2 LEAD (total recoverable) 02/28/2006 0.2 0.2 LEAD (total recoverable) 03/31/2006 0.4 0.4 LEAD (total recoverable) 04/30/2006 0.3 0.4 LEAD (total recoverable) 05/31/2006 0.3 0.4 LEAD (total recoverable) 06/30/2006 0.4 0.4 LEAD (total recoverable) 07/31/2006 0.4 0.4 LEAD (total recoverable) 08/31/2006 0.4 0.4 LEAD (total recoverable) 09/30/2006 0.3 0.3 LEAD (total recoverable) 10/31/2006 0.4 0.4 LEAD (total recoverable) 11/30/2006 1.0 1.0 LEAD (total recoverable) 12/31/2006 0.5 0.5Permit No.: WA0037168 City of Puyallup WWTP 96

LEAD (total recoverable) 01/31/2007 0.4 0.4 LEAD (total recoverable) 02/28/2007 0.4 0.4 LEAD (total recoverable) 03/31/2007 0.4 0.6 LEAD (total recoverable) 04/30/2007 0.3 0.3 LEAD (total recoverable) 05/31/2007 0.7 0.7 LEAD (total recoverable) 06/30/2007 0.3 0.3 LEAD (total recoverable) 07/31/2007 0.3 0.4 LEAD (total recoverable) 08/31/2007 0.8 0.8 LEAD (total recoverable) 09/30/2007 0.3 0.3 LEAD (total recoverable) 10/31/2007 0.5 0.6 LEAD (total recoverable) 11/30/2007 0.4 0.4 LEAD (total recoverable) 12/31/2007 0.7 0.7 LEAD (total recoverable) 01/31/2008 0.4 0.4 LEAD (total recoverable) 02/29/2008 0.3 0.3 LEAD (total recoverable) 03/31/2008 0.4 0.6 LEAD (total recoverable) 04/30/2008 0.5 0.5 LEAD (total recoverable) 05/31/2008 0.3 0.3 LEAD (total recoverable) 06/30/2008 0.2 0.2 LEAD (total recoverable) 07/31/2008 0.4 0.4 LEAD (total recoverable) 08/31/2008 0.3 0.3 LEAD (total recoverable) 09/30/2008 0.2 0.2 LEAD (total recoverable) 10/31/2008 0.6 0.6 LEAD (total recoverable) 11/30/2008 0.4 0.4 LEAD (total recoverable) 12/31/2008 0.4 0.4Permit No.: WA0037168 City of Puyallup WWTP 97

LEAD (total recoverable) 1/31/2009 0.4 0.4 LEAD (total recoverable) 2/28/2009 0.6 0.6 LEAD (total recoverable) 3/31/2009 0.6 1.1 LEAD (total recoverable) 4/30/2009 0.7 0.7 LEAD (total recoverable) 5/31/2009 0.3 0.3 LEAD (total recoverable) 6/30/2009 0.8 0.8 LEAD (total recoverable) 7/31/2009 0.6 0.6 LEAD (total recoverable) 8/31/2009 0.3 0.3 LEAD (total recoverable) 9/30/2009 0.3 0.3 LEAD (total recoverable) 10/13/2009 0.3 0.3 LEAD (total recoverable) 10/31/2009 0.4 0.4 LEAD (total recoverable) 11/30/2009 0.2 0.2 LEAD (total recoverable) 12/31/2009 0.2 0.2 LEAD (total recoverable) 1/31/2010 0.3 0.3 LEAD (total recoverable) 2/28/2010 0.2 0.2 LEAD (total recoverable) 3/31/2010 0.1 0.2 LEAD (total recoverable) 4/30/2010 0.2 0.2 LEAD (total recoverable) 5/31/2010 0.3 0.3 LEAD (total recoverable) 6/30/2010 0.1 0.1 LEAD (total recoverable) 7/31/2010 0.2 0.2 LEAD (total recoverable) 8/31/2010 0.2 0.2 LEAD (total recoverable) 9/30/2010 0.3 0.3 LEAD (total recoverable) 10/31/2010 0.3 0.3 LEAD (total recoverable) 11/30/2010 0.2 0.2Permit No.: WA0037168 City of Puyallup WWTP 98

LEAD (total recoverable) 12/31/2010 0.3 0.3 LEAD (total recoverable) 1/31/2011 0.3 0.3 LEAD (total recoverable) 2/28/2011 0.3 0.3 LEAD (total recoverable) 3/31/2011 0.2 0.2 LEAD (total recoverable) 4/30/2011 0.3 0.3 LEAD (total recoverable) 5/31/2011 0.2 0.2 LEAD (total recoverable) 6/30/2011 0.2 0.2 LEAD (total recoverable) 7/31/2011 0.4 0.1 LEAD (total recoverable) 8/31/2011 0.2 0.2 LEAD (total recoverable) 9/30/2011 0.2 0.2 LEAD (total recoverable) 10/31/2011 0.2 0.2 LEAD (total recoverable) 11/30/2011 0.2 0.2 LEAD (total recoverable) 12/31/2011 0.2 0.2 MERCURY (total recoverable) 08/31/2003 0.0052 0.0052 MERCURY (total recoverable) 09/30/2003 0.0022 0.0022 MERCURY (total recoverable) 10/31/2003 0.0123 0.0123 MERCURY (total recoverable) 11/30/2003 0.0040 0.0040 MERCURY (total recoverable) 12/31/2003 0.0053 0.0077 MERCURY (total recoverable) 01/31/2004 0.0058 0.0058 MERCURY (total recoverable) 02/29/2004 0.0032 0.0032 MERCURY (total recoverable) 03/31/2004 0.0037 0.0037 MERCURY (total recoverable) 04/30/2004 0.0026 0.0026 MERCURY (total recoverable) 05/31/2004 0.0058 0.0058 MERCURY (total recoverable) 06/30/2004 0.0032 0.0032Permit No.: WA0037168 City of Puyallup WWTP 99

MERCURY (total recoverable) 07/31/2004 0.0022 0.0022 MERCURY (total recoverable) 08/31/2004 0.0021 0.0021 MERCURY (total recoverable) 09/30/2004 0.0028 0.0028 MERCURY (total recoverable) 10/31/2004 0.0018 0.0018 MERCURY (total recoverable) 11/30/2004 0.0037 0.0045 MERCURY (total recoverable) 12/31/2004 0.0024 0.0024 MERCURY (total recoverable) 01/31/2005 0.0017 0.0017 MERCURY (total recoverable) 02/28/2005 0.0017 0.0017 MERCURY (total recoverable) 03/31/2005 0.0024 0.0026 MERCURY (total recoverable) 04/30/2005 0.0033 0.0033 MERCURY (total recoverable) 05/31/2005 0.0013 0.0013 MERCURY (total recoverable) 06/30/2005 0.0020 0.0020 MERCURY (total recoverable) 07/31/2005 0.0059 0.0059 MERCURY (total recoverable) 08/31/2005 0.0025 0.0025 MERCURY (total recoverable) 09/30/2005 0.0029 0.0029 MERCURY (total recoverable) 10/31/2005 0.0039 0.0039 MERCURY (total recoverable) 11/30/2005 0.0000 0.0000 MERCURY (total recoverable) 12/31/2005 0.0034 0.0034 MERCURY (total recoverable) 01/31/2006 0.0002 0.0024 MERCURY (total recoverable) 02/28/2006 0.0018 0.0018 MERCURY (total recoverable) 03/31/2006 0.0033 0.0033 MERCURY (total recoverable) 04/30/2006 0.0017 0.0019 MERCURY (total recoverable) 05/31/2006 0.0015 0.0015 MERCURY (total recoverable) 06/30/2006 0.0030 0.0030Permit No.: WA0037168 City of Puyallup WWTP 100

MERCURY (total recoverable) 07/31/2006 0.0040 0.0040 MERCURY (total recoverable) 08/31/2006 0.0018 0.0018 MERCURY (total recoverable) 09/30/2006 0.0011 0.0011 MERCURY (total recoverable) 10/31/2006 0.0011 0.0011 MERCURY (total recoverable) 11/30/2006 0.0022 0.0022 MERCURY (total recoverable) 01/31/2007 0.0023 0.0023 MERCURY (total recoverable) 02/28/2007 0.0041 0.0041 MERCURY (total recoverable) 03/31/2007 0.0021 0.0023 MERCURY (total recoverable) 04/30/2007 0.0027 0.0027 MERCURY (total recoverable) 05/31/2007 0.0014 0.0014 MERCURY (total recoverable) 06/30/2007 0.0012 0.0012 MERCURY (total recoverable) 07/31/2007 0.0011 0.0012 MERCURY (total recoverable) 09/30/2007 0.0012 0.0012 MERCURY (total recoverable) 10/31/2007 0.0023 0.0029 MERCURY (total recoverable) 11/30/2007 0.0017 0.0017 MERCURY (total recoverable) 12/31/2007 0.0032 0.0032 MERCURY (total recoverable) 01/31/2008 0.0020 0.0020 MERCURY (total recoverable) 02/29/2008 0.0020 0.0020 MERCURY (total recoverable) 03/31/2008 0.0000 0.0000 MERCURY (total recoverable) 04/30/2008 0.0000 0.0000 MERCURY (total recoverable) 05/31/2008 0.0176 0.0176 MERCURY (total recoverable) 06/30/2008 0.0014 0.0014 MERCURY (total recoverable) 08/31/2008 0.0000 0.0000 MERCURY (total recoverable) 09/30/2008 0.0015 0.0015Permit No.: WA0037168 City of Puyallup WWTP 101

MERCURY (total recoverable) 11/30/2008 0.0013 0.0013 MERCURY (total recoverable) 1/31/2009 0.0021 0.0021 MERCURY (total recoverable) 2/28/2009 0.0000 0.0001 MERCURY (total recoverable) 3/31/2009 <.0011 0.0023 MERCURY (total recoverable) 4/30/2009 0.0014 0.0014 MERCURY (total recoverable) 5/31/2009 0.0013 0.0013 MERCURY (total recoverable) 6/30/2009 0.0010 0.0010 MERCURY (total recoverable) 7/31/2009 0.0000 0.0001 MERCURY (total recoverable) 8/31/2009 0.0018 0.0018 MERCURY (total recoverable) 9/30/2009 0.0013 0.0014 MERCURY (total recoverable) 10/13/2009 0.0013 0.0014 MERCURY (total recoverable) 10/31/2009 0.0024 0.0024 MERCURY (total recoverable) 11/30/2009 0.0011 0.0011 MERCURY (total recoverable) 12/31/2009 0.0000 0.0001 MERCURY (total recoverable) 1/31/2010 0.0030 0.0030 MERCURY (total recoverable) 2/28/2010 0.0016 0.0016 MERCURY (total recoverable) 3/31/2010 0.0014 0.0020 MERCURY (total recoverable) 5/31/2010 0.0023 0.0023 MERCURY (total recoverable) 6/30/2010 0.0000 0.0000 MERCURY (total recoverable) 7/31/2010 0.0000 0.0000 MERCURY (total recoverable) 8/31/2010 0.0014 0.0014 MERCURY (total recoverable) 9/30/2010 0.0017 0.0017 MERCURY (total recoverable) 10/31/2010 0.0024 0.0024 MERCURY (total recoverable) 11/30/2010 0.0017 0.0017Permit No.: WA0037168 City of Puyallup WWTP 102

MERCURY (total recoverable) 12/31/2010 0.0019 0.0019 MERCURY (total recoverable) 1/31/2011 0.0520 0.0720 MERCURY (total recoverable) 2/28/2011 0.0013 0.0013 MERCURY (total recoverable) 3/31/2011 0.0024 0.0029 MERCURY (total recoverable) 4/30/2011 0.0029 0.0029 MERCURY (total recoverable) 5/31/2011 0.0030 0.0030 MERCURY (total recoverable) 6/30/2011 0.0024 0.0024 MERCURY (total recoverable) 7/31/2011 0.0014 0.0014 MERCURY (total recoverable) 8/31/2011 0.0015 0.0015 MERCURY (total recoverable) 9/30/2011 0.0015 0.0015 MERCURY (total recoverable) 10/31/2011 0.0023 0.0023 MERCURY (total recoverable) 11/30/2011 0.0017 0.0017 MERCURY (total recoverable) 12/31/2011 0.0022 0.0022 PH 08/31/2003 6.5 7.3 PH 09/30/2003 6.3 6.6 PH 10/31/2003 5.9 6.6 PH 11/30/2003 6.2 6.5 PH 12/31/2003 6.2 6.3 PH 01/31/2004 6.1 6.4 PH 02/29/2004 6.3 6.7 PH 03/31/2004 6.4 6.7 PH 04/30/2004 6.4 6.6 PH 05/31/2004 6.2 6.5 PH 06/30/2004 6.3 6.5Permit No.: WA0037168 City of Puyallup WWTP 103

PH 08/31/2004 6.4 6.7 PH 09/30/2004 6.2 6.8 PH 10/31/2004 6.3 6.6 PH 11/30/2004 6.4 6.6 PH 12/31/2004 6.4 6.8 PH 01/31/2005 6.1 6.8 PH 02/28/2005 6.5 6.7 PH 03/31/2005 6.4 6.9 PH 04/30/2005 6.7 7.0 PH 05/31/2005 6.7 7.0 PH 06/30/2005 6.8 7.1 PH 07/31/2005 6.8 7.0 PH 08/31/2005 6.7 7.0 PH 09/30/2005 6.8 7.0 PH 10/31/2005 6.9 7.0 PH 11/30/2005 6.6 6.9 PH 12/31/2005 6.6 6.8 PH 01/31/2006 6.5 6.8 PH 02/28/2006 6.5 6.9 PH 03/31/2006 6.7 6.9 PH 04/30/2006 6.6 6.9 PH 05/31/2006 6.7 7.0 PH 06/30/2006 6.7 7.2 PH 07/31/2006 6.5 7.2Permit No.: WA0037168 City of Puyallup WWTP 104

PH 08/31/2006 6.8 7.4 PH 09/30/2006 6.6 7.2 PH 10/31/2006 6.6 7.2 PH 11/30/2006 6.5 7.1 PH 12/31/2006 6.3 6.8 PH 01/31/2007 6.4 6.7 PH 02/28/2007 6.2 6.7 PH 03/31/2007 6.2 6.8 PH 04/30/2007 6.4 7.1 PH 05/31/2007 6.2 7.4 PH 06/30/2007 6.9 7.3 PH 07/31/2007 6.8 7.4 PH 08/31/2007 6.8 7.3 PH 09/30/2007 6.7 7.1 PH 10/31/2007 6.7 7.1 PH 11/30/2007 6.8 7.1 PH 12/31/2007 6.5 7.0 PH 01/31/2008 6.5 7.1 PH 02/29/2008 6.5 7.1 PH 03/31/2008 6.5 7.2 PH 10/31/2008 6.8 7.2 PH 11/30/2008 6.7 7.1 PH 12/31/2008 6.6 7.3 PH 1/31/2009 6.6 7.0Permit No.: WA0037168 City of Puyallup WWTP 105

PH 3/31/2009 6.7 7.1 PH 4/30/2009 6.7 7.2 PH 5/31/2009 6.8 7.2 PH 6/30/2009 6.8 7.2 PH 7/31/2009 6.8 7.2 PH 8/31/2009 6.7 7.1 PH 9/30/2009 6.6 7.2 PH 10/13/2009 6.6 7.2 PH 10/31/2009 6.5 7.1 PH 11/30/2009 6.5 7.3 PH 12/31/2009 6.6 7.1 PH 1/31/2010 6.7 7.0 PH 2/28/2010 6.7 7.0 PH 3/31/2010 6.7 7.1 PH 4/30/2010 6.7 7.2 PH 5/31/2010 6.7 7.6 PH 6/30/2010 6.7 7.1 PH 7/31/2010 6.8 7.2 PH 8/31/2010 6.9 7.4 PH 9/30/2010 6.4 7.3 PH 10/31/2010 6.7 7.4 PH 11/30/2010 6.7 7.2 PH 12/31/2010 6.5 7.1 PH 1/31/2011 6.6 7.2Permit No.: WA0037168 City of Puyallup WWTP 106

PH 2/28/2011 6.4 7.2 PH 3/31/2011 6.6 7.0 PH 4/30/2011 6.5 7.3 PH 5/31/2011 6.5 7.1 PH 6/30/2011 6.7 7.4 PH 7/31/2011 6.7 7.3 PH 8/31/2011 6.7 7.6 PH 9/30/2011 6.8 7.6 PH 10/31/2011 6.6 7.2 PH 11/30/2011 6.6 7.1 PH 12/31/2011 6.6 7.2 TEMPERATURE ( C) 08/31/2003 22.3 23.1 TEMPERATURE ( C) 09/30/2003 21.5 23.0 TEMPERATURE ( C) 10/31/2003 19.8 21.3 TEMPERATURE ( C) 11/30/2003 16.0 17.2 TEMPERATURE ( C) 12/31/2003 14.5 15.8 TEMPERATURE ( C) 01/31/2004 13.4 14.4 TEMPERATURE ( C) 02/29/2004 13.8 14.7 TEMPERATURE ( C) 03/31/2004 15.0 16.3 TEMPERATURE ( C) 04/30/2004 16.9 18.0 TEMPERATURE ( C) 05/31/2004 18.7 19.8 TEMPERATURE ( C) 06/30/2004 20.2 21.5 TEMPERATURE ( C) 08/31/2004 22.4 23.6 TEMPERATURE ( C) 09/30/2004 20.8 22.4Permit No.: WA0037168 City of Puyallup WWTP 107

TEMPERATURE ( C) 10/31/2004 19.1 20.9 TEMPERATURE ( C) 11/30/2004 17.1 18.4 TEMPERATURE ( C) 12/31/2004 15.6 16.5 TEMPERATURE ( C) 01/31/2005 14.4 15.4 TEMPERATURE ( C) 02/28/2005 14.5 15.3 TEMPERATURE ( C) 03/31/2005 15.9 17.1 TEMPERATURE ( C) 04/30/2005 16.1 17.8 TEMPERATURE ( C) 05/31/2005 18.4 20.7 TEMPERATURE ( C) 06/30/2005 20.0 21.3 TEMPERATURE ( C) 07/31/2005 21.6 23.0 TEMPERATURE ( C) 08/31/2005 22.4 22.8 TEMPERATURE ( C) 09/30/2005 21.0 22.7 TEMPERATURE ( C) 10/31/2005 19.9 20.6 TEMPERATURE ( C) 11/30/2005 16.7 18.2 TEMPERATURE ( C) 12/31/2005 14.5 15.4 TEMPERATURE ( C) 01/31/2006 13.5 14.4 TEMPERATURE ( C) 02/28/2006 13.4 14.5 TEMPERATURE ( C) 03/31/2006 14.6 16.0 TEMPERATURE ( C) 04/30/2006 16.2 18.3 TEMPERATURE ( C) 05/31/2006 18.2 20.2 TEMPERATURE ( C) 06/30/2006 21.3 TEMPERATURE ( C) 07/31/2006 21.5 23.1 TEMPERATURE ( C) 08/31/2006 21.9 22.8 TEMPERATURE ( C) 09/30/2006 21.1 22.5Permit No.: WA0037168 City of Puyallup WWTP 108

TEMPERATURE ( C) 10/31/2006 19.6 21.4 TEMPERATURE ( C) 11/30/2006 18.2 TEMPERATURE ( C) 12/31/2006 15.6 TEMPERATURE ( C) 01/31/2007 14.5 TEMPERATURE ( C) 02/28/2007 14.6 TEMPERATURE ( C) 03/31/2007 14.3 15.4 TEMPERATURE ( C) 04/30/2007 16.9 TEMPERATURE ( C) 05/31/2007 17.7 19.3 TEMPERATURE ( C) 06/30/2007 21.3 TEMPERATURE ( C) 07/31/2007 21.4 22.9 TEMPERATURE ( C) 08/31/2007 22.1 TEMPERATURE ( C) 09/30/2007 22.1 TEMPERATURE ( C) 10/31/2007 19.3 TEMPERATURE ( C) 11/30/2007 17.8 TEMPERATURE ( C) 12/31/2007 15.1 TEMPERATURE ( C) 01/31/2008 14.3 TEMPERATURE ( C) 02/29/2008 14.8 TEMPERATURE ( C) 03/31/2008 15.5 TEMPERATURE ( C) 10/31/2008 20.7 TEMPERATURE ( C) 11/30/2008 18.4 TEMPERATURE ( C) 12/31/2008 17.2 TEMPERATURE ( C) 1/31/2009 14.1 TEMPERATURE ( C) 3/31/2009 14.8 TEMPERATURE ( C) 7/31/2009 23.1Permit No.: WA0037168 City of Puyallup WWTP 109

TEMPERATURE ( C) 1/31/2010 14.3 TEMPERATURE ( C) 2/28/2010 14.6 TEMPERATURE ( C) 3/31/2010 16.1 TEMPERATURE ( C) 4/30/2010 16.8 TEMPERATURE ( C) 5/31/2010 18.5 TEMPERATURE ( C) 6/30/2010 19.2 TEMPERATURE ( C) 7/31/2010 21.1 TEMPERATURE ( C) 8/31/2010 22.2 TEMPERATURE ( C) 9/30/2010 21.6 TEMPERATURE ( C) 10/31/2010 20.7 TEMPERATURE ( C) 11/30/2010 18.2 TEMPERATURE ( C) 12/31/2010 15.7 TEMPERATURE ( C) 1/31/2011 14.4 TEMPERATURE ( C) 2/28/2011 15.0 TEMPERATURE ( C) 3/31/2011 14.3 TEMPERATURE ( C) 4/30/2011 15.6 TEMPERATURE ( C) 5/31/2011 17.1 TEMPERATURE ( C) 6/30/2011 19.7 TEMPERATURE ( C) 7/31/2011 21.4 TEMPERATURE ( C) 8/31/2011 22.6 TEMPERATURE ( C) 9/30/2011 22.3 TEMPERATURE ( C) 10/31/2011 20.5 TEMPERATURE ( C) 11/30/2011 17.2 TEMPERATURE ( C) 12/31/2011 15.0Permit No.: WA0037168 City of Puyallup WWTP 110

TSS 08/31/2003 6.8 9.7 TSS 09/30/2003 4.9 5.3 TSS 10/31/2003 7.3 10.8 TSS 11/30/2003 9.3 10.1 TSS 12/31/2003 9.9 10.9 TSS 01/31/2004 10.1 11.7 TSS 02/29/2004 10.5 12.8 TSS 03/31/2004 12.4 14.6 TSS 04/30/2004 8.8 11.4 TSS 05/31/2004 7.4 16.3 TSS 06/30/2004 4.9 6.6 TSS 08/31/2004 8.2 11.8 TSS 09/30/2004 7.4 9.6 TSS 10/31/2004 3.9 5.6 TSS 11/30/2004 3.7 4.5 TSS 12/31/2004 3.9 4.5 TSS 01/31/2005 4.2 5.8 TSS 02/28/2005 4.0 4.2 TSS 03/31/2005 5.4 6.1 TSS 04/30/2005 3.7 5.0 TSS 05/31/2005 3.5 3.8 TSS 06/30/2005 5.3 9.1 TSS 07/31/2005 7.2 10.0 TSS 08/31/2005 3.2 4.8Permit No.: WA0037168 City of Puyallup WWTP 111

TSS 09/30/2005 4.8 6.2 TSS 10/31/2005 6.4 7.5 TSS 11/30/2005 8.4 9.7 TSS 12/31/2005 4.0 5.7 TSS 01/31/2006 9.3 14.9 TSS 02/28/2006 6.3 12.1 TSS 03/31/2006 4.0 6.5 TSS 04/30/2006 3.6 4.4 TSS 05/31/2006 3.0 4.0 TSS 06/30/2006 5.0 6.0 TSS 07/31/2006 4.9 7.6 TSS 08/31/2006 3.2 4.0 TSS 09/30/2006 3.9 4.4 TSS 10/31/2006 5.0 6.0 TSS 11/30/2006 4.8 5.8 TSS 12/31/2006 6.0 8.5 TSS 01/31/2007 5.2 9.5 TSS 02/28/2007 5.8 8.0 TSS 03/31/2007 7.1 8.9 TSS 04/30/2007 6.4 7.8 TSS 05/31/2007 3.8 5.7 TSS 06/30/2007 4.1 4.6 TSS 07/31/2007 3.7 4.3 TSS 08/31/2007 2.9 3.4Permit No.: WA0037168 City of Puyallup WWTP 112

TSS 09/30/2007 4.6 6.3 TSS 10/31/2007 6.0 7.3 TSS 11/30/2007 6.1 6.5 TSS 12/31/2007 7.1 8.8 TSS 01/31/2008 7.1 8.5 TSS 02/29/2008 7.1 10.5 TSS 03/31/2008 5.0 5.4 TSS 10/31/2008 2.1 2.6 TSS 11/30/2008 3.0 3.7 TSS 12/31/2008 4.4 6.0 TSS 1/31/2009 4.8 6.3 TSS 3/31/2009 3.8 5.3 TSS 4/30/2009 4.6 6.3 TSS 5/31/2009 2.8 3.9 TSS 6/30/2009 2.2 2.5 TSS 7/31/2009 2.6 3.2 TSS 8/31/2009 3.4 4.0 TSS 9/30/2009 3.1 4.5 TSS 10/13/2009 3.1 4.5 TSS 10/31/2009 4.7 7.2 TSS 11/30/2009 4.5 5.7 TSS 12/31/2009 6.1 7.0 TSS 1/31/2010 6.9 9.5 TSS 2/28/2010 3.4 3.9Permit No.: WA0037168 City of Puyallup WWTP 113

TSS 3/31/2010 3.0 4.0 TSS 4/30/2010 4.5 6.8 TSS 5/31/2010 4.6 6.6 TSS 6/30/2010 2.5 3.0 TSS 7/31/2010 4.3 6.8 TSS 8/31/2010 3.4 4.6 TSS 9/30/2010 4.6 5.0 TSS 10/31/2010 5.7 7.0 TSS 11/30/2010 5.9 6.3 TSS 12/31/2010 6.4 7.6 TSS 1/31/2011 5.5 6.7 TSS 2/28/2011 4.6 4.9 TSS 3/31/2011 5.8 7.4 TSS 4/30/2011 7.5 9.2 TSS 5/31/2011 6.6 9.4 TSS 6/30/2011 5.2 7.8 TSS 7/31/2011 3.8 4.6 TSS 8/31/2011 3.5 5.2 TSS 9/30/2011 3.7 4.5 TSS 10/31/2011 9.7 14.5 TSS 11/30/2011 7.1 9.1 TSS 12/31/2011 5.3 6.9 TSS, % REMOVAL 08/31/2003 98.0 TSS, % REMOVAL 09/30/2003 99.0Permit No.: WA0037168 City of Puyallup WWTP 114

TSS, % REMOVAL 10/31/2003 98.0 TSS, % REMOVAL 11/30/2003 97.0 TSS, % REMOVAL 12/31/2003 96.0 TSS, % REMOVAL 01/31/2004 96.0 TSS, % REMOVAL 02/29/2004 96.0 TSS, % REMOVAL 03/31/2004 96.0 TSS, % REMOVAL 04/30/2004 98.0 TSS, % REMOVAL 05/31/2004 98.0 TSS, % REMOVAL 06/30/2004 99.0 TSS, % REMOVAL 07/31/2004 98.0 TSS, % REMOVAL 08/31/2004 98.0 TSS, % REMOVAL 09/30/2004 98.0 TSS, % REMOVAL 10/31/2004 99.0 TSS, % REMOVAL 11/30/2004 99.0 TSS, % REMOVAL 12/31/2004 99.0 TSS, % REMOVAL 01/31/2005 99.0 TSS, % REMOVAL 02/28/2005 99.0 TSS, % REMOVAL 05/31/2005 99.0 TSS, % REMOVAL 06/30/2005 98.0 TSS, % REMOVAL 07/31/2005 98.0 TSS, % REMOVAL 08/31/2005 99.0 TSS, % REMOVAL 09/30/2005 99.0 TSS, % REMOVAL 10/31/2005 98.0 TSS, % REMOVAL 11/30/2005 97.0Permit No.: WA0037168 City of Puyallup WWTP 115

TSS, % REMOVAL 12/31/2005 98.0 TSS, % REMOVAL 01/31/2006 94.0 TSS, % REMOVAL 02/28/2006 97.0 TSS, % REMOVAL 03/31/2006 97.0 TSS, % REMOVAL 04/30/2006 99.0 TSS, % REMOVAL 05/31/2006 98.0 TSS, % REMOVAL 06/30/2006 94.0 TSS, % REMOVAL 07/31/2006 98.0 TSS, % REMOVAL 08/31/2006 98.8 TSS, % REMOVAL 09/30/2006 98.0 TSS, % REMOVAL 10/31/2006 98.1 TSS, % REMOVAL 11/30/2006 94.6 TSS, % REMOVAL 12/31/2006 91.3 TSS, % REMOVAL 01/31/2007 97.0 TSS, % REMOVAL 02/28/2007 97.4 TSS, % REMOVAL 03/31/2007 96.4 TSS, % REMOVAL 04/30/2007 97.6 TSS, % REMOVAL 05/31/2007 98.6 TSS, % REMOVAL 06/30/2007 98.7 TSS, % REMOVAL 07/31/2007 98.8 TSS, % REMOVAL 08/31/2007 99.2 TSS, % REMOVAL 09/30/2007 98.8 TSS, % REMOVAL 10/31/2007 97.8 TSS, % REMOVAL 11/30/2007 97.1Permit No.: WA0037168 City of Puyallup WWTP 116

TSS, % REMOVAL 12/31/2007 93.2 TSS, % REMOVAL 01/31/2008 94.5 TSS, % REMOVAL 02/29/2008 96.8 TSS, % REMOVAL 03/31/2008 97.9 TSS, % REMOVAL 04/30/2008 98.6 TSS, % REMOVAL 05/31/2008 99.0 TSS, % REMOVAL 06/30/2008 99.1 TSS, % REMOVAL 07/31/2008 99.0 TSS, % REMOVAL 08/31/2008 99.2 TSS, % REMOVAL 09/30/2008 99.4 TSS, % REMOVAL 10/31/2008 99.2 TSS, % REMOVAL 11/30/2008 98.7 TSS, % REMOVAL 12/31/2008 98.7 TSS, % REMOVAL 1/31/2009 98.4 TSS, % REMOVAL 2/28/2009 98.8 TSS, % REMOVAL 3/31/2009 98.2 TSS, % REMOVAL 4/30/2009 97.7 TSS, % REMOVAL 5/31/2009 98.7 TSS, % REMOVAL 6/30/2009 99.2 TSS, % REMOVAL 7/31/2009 99.1 TSS, % REMOVAL 8/31/2009 98.8 TSS, % REMOVAL 9/30/2009 98.9 TSS, % REMOVAL 10/13/2009 98.9 TSS, % REMOVAL 10/31/2009 98.4Permit No.: WA0037168 City of Puyallup WWTP 117

TSS, % REMOVAL 11/30/2009 97.7 TSS, % REMOVAL 12/31/2009 97.2 TSS, % REMOVAL 1/31/2010 95.9 TSS, % REMOVAL 2/28/2010 98.4 TSS, % REMOVAL 3/31/2010 98.6 TSS, % REMOVAL 4/30/2010 98.1 TSS, % REMOVAL 5/31/2010 98.3 TSS, % REMOVAL 6/30/2010 99.0 TSS, % REMOVAL 7/31/2010 98.6 TSS, % REMOVAL 8/31/2010 98.9 TSS, % REMOVAL 9/30/2010 98.5 TSS, % REMOVAL 10/31/2010 98.1 TSS, % REMOVAL 11/30/2010 97.5 TSS, % REMOVAL 12/31/2010 96.7 TSS, % REMOVAL 1/31/2011 97.3 TSS, % REMOVAL 2/28/2011 98.1 TSS, % REMOVAL 3/31/2011 96.3 TSS, % REMOVAL 4/30/2011 95.8 TSS, % REMOVAL 5/31/2011 96.9 TSS, % REMOVAL 6/30/2011 97.7 TSS, % REMOVAL 7/31/2011 98.6 TSS, % REMOVAL 8/31/2011 98.8 TSS, % REMOVAL 9/30/2011 98.8 TSS, % REMOVAL 10/31/2011 96.4Permit No.: WA0037168 City of Puyallup WWTP 118

TSS, % REMOVAL 11/30/2011 97.0 TSS, % REMOVAL 12/31/2011 97.9 ZINC (total recove rable) 01/31/2006 23.0 23.0 ZINC (total recove rable) 02/28/2006 41.0 44.0 ZINC (total recove rable) 03/31/2006 35.1 38.8 ZINC (total recove rable) 04/30/2006 42.0 44.3 ZINC (total recove rable) 05/31/2006 51.0 52.0 ZINC (total recove rable) 06/30/2006 47.0 47.0 ZINC (total recove rable) 07/31/2006 64.6 64.6 ZINC (total recove rable) 08/31/2006 53.9 53.9 ZINC (total recove rable) 09/30/2006 51.5 51.5 ZINC (total recove rable) 10/31/2006 55.9 55.9 ZINC (total recove rable) 11/30/2006 72.4 72.4 ZINC (total recove rable) 12/31/2006 43.3 43.3 ZINC (total recove rable) 01/31/2007 38.7 38.7 ZINC (total recove rable) 02/28/2007 44.3 44.3 ZINC (total recove rable) 03/31/2007 40.6 45.0 ZINC (total recove rable) 04/30/2007 34.8 34.8 ZINC (total recove rable) 05/31/2007 67.2 67.2 ZINC (total recove rable) 06/30/2007 39.0 39.0 ZINC (total recove rable) 07/31/2007 57.3 60.7 ZINC (total recove rable) 08/31/2007 69.8 71.9 ZINC (total recove rable) 09/30/2007 49.2 49.2 ZINC (total recove rable) 10/31/2007 54.4 59.4Permit No.: WA0037168 City of Puyallup WWTP 119

ZINC (total recove rable) 11/30/2007 52.1 52.1 ZINC (total recove rable) 12/31/2007 23.7 23.7 ZINC (total recove rable) 01/31/2008 30.5 30.5 ZINC (total recove rable) 02/29/2008 29.7 29.7 ZINC (total recove rable) 03/31/2008 39.6 44.8 ZINC (total recove rable) 04/30/2008 38.4 38.4 ZINC (total recove rable) 05/31/2008 45.0 45.0 ZINC (total recove rable) 06/30/2008 30.7 30.7 ZINC (total recove rable) 07/31/2008 41.6 41.6 ZINC (total recove rable) 08/31/2008 46.8 46.8 ZINC (total recove rable) 09/30/2008 46.5 46.5 ZINC (total recove rable) 10/31/2008 65.0 65.0 ZINC (total recove rable) 11/30/2008 60.6 60.6 ZINC (total recove rable) 12/31/2008 53.0 53.0 ZINC (total recove rable) 1/31/2009 22.8 22.8 ZINC (total recove rable) 2/28/2009 45.8 45.8 ZINC (total recove rable) 3/31/2009 49.0 49.5 ZINC (total recove rable) 4/30/2009 37.1 37.1 ZINC (total recove rable) 5/31/2009 37.7 37.7 ZINC (total recove rable) 6/30/2009 44.9 44.9 ZINC (total recove rable) 7/31/2009 53.6 53.6 ZINC (total recove rable) 8/31/2009 43.1 43.1 ZINC (total recove rable) 9/30/2009 43.4 46.5 ZINC (total recove rable) 10/13/2009 43.4 46.5Permit No.: WA0037168 City of Puyallup WWTP 120

ZINC (total recove rable) 10/31/2009 55.0 55.0 ZINC (total recove rable) 11/30/2009 27.5 27.5 ZINC (total recove rable) 12/31/2009 20.8 20.8 ZINC (total recove rable) 1/31/2010 19.7 19.7 ZINC (total recove rable) 2/28/2010 28.8 28.8 ZINC (total recove rable) 3/31/2010 29.4 30.1 ZINC (total recove rable) 4/30/2010 24.2 24.2 ZINC (total recove rable) 5/31/2010 29.0 29.0 ZINC (total recove rable) 6/30/2010 23.6 23.6 ZINC (total recove rable) 7/31/2010 35.0 35.0 ZINC (total recove rable) 8/31/2010 39.5 39.5 ZINC (total recove rable) 9/30/2010 45.0 45.0 ZINC (total recove rable) 10/31/2010 39.3 39.3 ZINC (total recove rable) 11/30/2010 28.9 28.9 ZINC (total recove rable) 12/31/2010 39.9 39.9 ZINC (total recove rable) 1/31/2011 35.7 35.7 ZINC (total recove rable) 2/28/2011 27.4 27.4 ZINC (total recove rable) 3/31/2011 23.6 24.4 ZINC (total recove rable) 4/30/2011 22.9 22.9 ZINC (total recove rable) 5/31/2011 27.9 27.9 ZINC (total recove rable) 6/30/2011 24.4 24.4 ZINC (total recove rable) 7/31/2011 25.1 25.1 ZINC (total recove rable) 8/31/2011 28.7 28.7 ZINC (total recove rable) 9/30/2011 44.5 44.5Permit No.: WA0037168 City of Puyallup WWTP 121

ZINC (total recove rable) 10/31/2011 45.9 45.9 ZINC (total recove rable) 11/30/2011 37.3 37.3 ZINC (total recove rable) 12/31/2011 24.0 24.0Permit No.: WA0037168 City of Puyallup WWTP 122 APPENDIX F – PRE-CERTIFICATION OF DRAFT PERMITDRAFT CERTIFICATION UNDER 401 OF THE CLEAN WATER ACT FOR PUYALLUP WASTEWATER TREATMENT PLANT (PUYALLUP, WASHINGTON) As required under section 401 of the Clean Wate r Act, the Puyallup Tribe of Indians has been requested by EPA to certify that the wastewater discharged from the City of Puyallup Wastewater Treatment Plant will comp ly with the Water Quality Standards for Surface Waters of the Puyallup Tribe. Region X EPA is proposing to issue a National Pollutant Discharge Elimination System pe rmit (WA-003716-8) to the City of Puyallup Wastewater Treatment Plant, authorizing the discharge of wastewater from the wastewater treatment facility located in th e City of Puyallup to the Puyallup River at latitude 47o12'26"N, l ongitude 122o 19' 11" W. Upon review of the draft NPDES permit (W A-003716-8), the Puyallup Tribe of Indians is granting certification under S ection 401 of the Clean Water Ac t that there is reasonable assurance that the proposed activity and resulting discha rge is in compliance with requirements of the Clean Water Act and Wate r Quality Standards for Surface Waters of the Puyallup Tribe provided that the following conditions are satisfied:

1. A mixing zone pursuant to section 9 of the Tribe’s Water Quality Standards is authorized for copper, pH, and ammonia provided that the City of Puyallup monitor annually during cri tical conditions at the edge of the mixing zone. The intent of monitoring is to ensure that wa ter quality criteria are met at the edge of the mixing zone over the life of the NPDES permit. Samples should be collected prior to the annual maintenance of the out fall and diffuser valves so that samples are representative of typical conditions. The Tribe will work with the City of Puyallup in developing a monitoring progr am that includes upstream sampling as well as sampling within the mixing zone boundary. A Quality Assurance Project Plan shall be submitted to the Tribe’s Environmental Protection Department for review and approval prior to sampling. See Section I.D. of the draft permit. 2. As required in Section I.D. of the draf t permit, the permittee must conduct surface water monitoring for total ammonia, temp erature, pH, hardness, arsenic (total, dissolved, inorganic), copper (dissolved), and mercury (total). The permittee must develop a plan or modify the existing plan to incorporate new parameters, including continuous temperature monitoring for both effluent temperature monitoring and surface water temperature monitoring. Sampling frequencies, methods, and method detection limit threshol ds for all parameters to be sampled are detailed in Table 2 of the draft pe rmit. Continuous temperature monitoring of the effluent shall begin with in six months of the effective date of the permit. The temperature sensor should be set to re cord at one-hour intervals. The 1-day maximum temperature and the 7-day averag e of the daily maximum temperatures ( 7-DADMax) should be recorded on the DMRs. The electronic data file must be submitted to the Puyallup Tribe annually by January 31 st for the previous monitoring. A placement log that include s the following information relative to

City of Puyallup NPDES Permit (No. WA-003716-8)- Draft 401 Certification Page 1the sensor deployment must be included in the submittal: date, time, temperature device manufacturer ID, location, depth, whether it measured air or water temperature, and any other details that may explain data anomalies. The Report must be submitted to EPA and the Puyallup Tribe with the application for permit renewal. See Section I.D (No. 1 through 10) a nd Table 2, including table notes, of the draft permit. 3. As required in Section II.B of the draf t permit, the permittee must conduct arsenic monitoring for five years to assist in de termining if there is reasonable potential for inorganic arsenic to exceed human heal th criteria. The permittee must monitor treatment plant influent and effluent quarterly for inorganic arsenic and total recoverable arsenic for five years. The permittee must also monitor the upstream receiving water for inorganic, dissolv ed, and total recoverable arsenic. The monitoring results must be submitted to EPA and the Tribe with the application for permit renewal and reported on the DMRs. See Section I.D. and II.B. 4. The permittee shall conduct an annual outfall inspection and repair any and all tideflex valves damaged by the river bed load during low flow conditions. This annual inspection and maintenance program is intended to optimize mixing and dilution. 5. Monitoring data must be submitted electronically to EPA and the Tribe no later than the 15 th of the month following the completed reporting period. Electronic submittals can be e-mailed directly to Char Naylor at char.naylor@puyalluptribe.com

. 6. The permittee shall provide an annual report to the USFWS, NMFS and the Puyallup Tribe by February 15 each year of the permit term. The annual report shall compile and summarize data and information from Discharge Monitoring Reports submitted by the City of Puyallup, and shall include the following: a. A summary of maximum reported effluent discharge concentration b. A summary of any reported effluent limit violations. c. A summary of any reported emergency and/or non-compliance events, including any instances when the WWTP discharged under bypass or upset conditions. d. A summary of surface/receiving water monitoring data. e. Results of annual Whole Effluent Toxicity testing. f. A summary if there have been any significant revisions to the facility operation and maintenance (O&M) plan. See Section III.B.3 in the draft permit.

City of Puyallup NPDES Permit (No. WA-003716-8)- Draft 401 Certification Page 2