Permit No.: WA0037168 Page 1 of 41

United States Environmental Protection Agency

Region 10 1200 Sixth Avenue Suite 900 Seattle, Washington 98101-3140



### A uthorization to Discharge Under the National Pollutant Discharge Elimination System

In compliance with the provisions of the Clean Water Act, 33 U.S.C. §1251 et seq ., as amended by the Water Quality Act of 1987, P.L. 100-4, the “Act”,

City of Puyallup Wastewater Treatment Plant

1602 18th St NW Puyallup, WA 98371

is authorized to discharge from the wastewater treatment facility located in the City of Puyallup at the following location:

Outfall Receiving Water Latitude Longitude 001 Puyallup River 47o 12' 26" N 122o 19' 11" W

in accordance with discharge point(s), effluent limitations, monitoring requirements and other

c onditions set forth herein.

This permit shall become effective December 1, 2014

This permit and the authorization to discharge shall expire at midnight, November 3 0

, 2019

The permittee shall reapply for a permit reissuance on or before June 3, 2019, 180 days before the expiration of this permit if the permittee intends to continue operations and discharges at the facility beyond the term of this permit.

Signed this 9 th day of October, 2014.

/s/ Christine Psyk for Daniel D. Opalski, Director Office of Water and WatershedsPermit No.: WA0037168 Page 2 of 41



### Schedule of Submissions The following is a summary of some of the items the permittee must complete and/or submit to EPA during the term of this permit:

Item Due Date 1 . Discharge Monitoring Reports (DMR) DMRs are due monthly and must be postmarked on or before the twentieth day of each subsequent month.
2. Quality Assurance Plan (QAP) The permittee must provide EPA with written notification that the Plan has been dev eloped and implemented within 180 days of the effective date of the final permit (see I.C.). The Plan must be kept on site and made available to EPA and the Puyallup Tribe upon request. 3. Operation and Maintenance (O&M) Plan The permittee must provide EPA with written notification that the Plan has been developed and implemented within 180 days of the effective date of the final permit (see II.C.). The Plan must be kept on site and made available to EPA an d the Puyallup Tribe upon request.

4. NPDES A pplication Renewal The application must be submitted at least 180 days before the expiration date of the permit (see V.B.).
5. Surface Water Monitoring Report The Report must be submitted to EPA and the Puyallup Tribe with the application for permit rene wal

. 6 . Twenty

- Four Hour Notice of Noncompliance Reporting The permittee must report certain occurrences of noncompliance by telephone within 24 hours from the time the permittee becomes aware of the circumstances. ( See III.G. and I.B.)

7 . Local Limit s Evaluation By December 31

, 201 5

, the permittee must submit to EPA a complete local limits evaluation pursuant to 40 CFR 403.5(c)(1). (See II.A.5.)

8 . Annual Pretreatment Report The Report must be submitted to the pretreatment coordinator no later than February 15 of the year following each calendar year. (See II.A.9.)

9 . Emergency Response and Public Notification Plan The permittee must develop and implement an overflow emergency response and public notification plan. The permittee must submit writte n notice to EPA and the Puyallup Tribe that the plan has been developed and implemented within 180 days of the effective date of this permit.
10.Lead and Zinc Study By November 1

, 2016, the permittee must complete a study to determine the source(s) of l ead and zinc in the wastewater treatment plant effluent and identify opportunities for reduction of lead and zinc levels at the source. Submit the study to the Tribe, EPA, and Ecology. (See II. D.)
11. Mercury Minimization The permittee must submit an annual status report. (See II.C.)Permit No.: WA0037168 Page 3 of 41



### Table of Contents

Schedule of Submissions ............................................................................................................... 2

I. Limitations and Monitoring Requirements ......................................................................... 5

A. Discharge Authorization ..................................................................................................... 5 B. Effluent Limitations and Monitoring .................................................................................. 5 C. Whole Effluent Toxicity Testing Requirements ................................................................. 9 D. Surface Water Monitoring ................................................................................................ 12

II. Special Conditions ............................................................................................................. 14

A. Pretreatment Requirements ............................................................................................... 14 B. Arsenic Monitoring ........................................................................................................... 21 C. Mercury Minimization Plan .............................................................................................. 22 D. Lead and Zinc Study ......................................................................................................... 22 E. Operation and Maintenance Plan ...................................................................................... 23 F. Quality Assurance Plan (QAP) ......................................................................................... 23 G. Facility Planning Requirement ......................................................................................... 23 H. Emergency Response and Public Notification Plan

................................ .......................... 24

III. Monitoring, Recording and Reporting Requirements .................................................. 25

A. Representative Sampling (Routine and Non-Routine Discharges) ................................... 25 B. Reporting of Monitoring Results ...................................................................................... 25 C. Monitoring Procedures...................................................................................................... 27 D. Additional Monitoring by Permittee ................................................................................. 27 E. Records Contents .............................................................................................................. 28 F. Retention of Records......................................................................................................... 28 G. Twenty-four Hour Notice of Noncompliance Reporting .................................................. 28 H. Other Noncompliance Reporting ...................................................................................... 29 I. Public Notification ............................................................................................................ 30 J. Notice of New Introduction of Toxic Pollutants............................................................... 30

IV. Compliance Responsibilities ............................................................................................ 30

A. Duty to Comply................................................................................................................. 30 B. Penalties for Violations of Permit Conditions .................................................................. 30 C. Need To Halt or Reduce Activity not a Defense .............................................................. 32 D. Duty to Mitigate ................................................................................................................ 32 E. Proper Operation and Maintenance .................................................................................. 32 F. Bypass of Treatment Facilities.......................................................................................... 33 G. Upset Conditions ............................................................................................................... 33 H. Toxic Pollutants ................................................................................................................ 34 I. Planned Changes ............................................................................................................... 34 J. Anticipated Noncompliance.............................................................................................. 34 K. Reopener ........................................................................................................................... 35

V. General Provisions ............................................................................................................ 35Permit No.: WA0037168 Page 4 of 41

A. Permit Actions .................................................................................................................. 35 B. Duty to Reapply ................................................................................................................ 35 C. Duty to Provide Information ............................................................................................. 35 D. Other Information ............................................................................................................. 35 E. Signatory Requirements .................................................................................................... 35 F. Availability of Reports ...................................................................................................... 36 G. Inspection and Entry ......................................................................................................... 37 H. Property Rights ................................................................................................................. 37 I. Transfers ........................................................................................................................... 37 J. State Laws ......................................................................................................................... 37

VI. Definitions .......................................................................................................................... 38Permit No.: WA0037168 Page 5 of 41



### I. Limitations and Monitoring Requirements

A. Discharge Authorization During the effective period of this permit, the permittee is authorized to discharge pollutants from the outfalls specified herein to the Puyallup River, within the limits and subject to the conditions set forth herein. This permit authorizes the discharge of only those pollutants resulting from facility processes, waste streams, and operations that ha ve been clearly identified in the permit application process.

B. Effluent Limitations and Monitoring
1. The permittee must limit and monitor discharges from outfall 001 as specified in Table 1, below. All figures represent maximum effluent limits unless otherwise indi cated. The permittee must comply with the effluent limits in the tables at all times unless otherwise indicated, regardless of the frequency of monitoring or reporting required by other provisions of this permit.

Table 1: Effluent Limitations and Monitoring Requirements

Parameter Effluent Limitations Monitoring Requirements

Average Monthly Limit Average

Weekly Limit Max

Daily Limit Instantaneous

Maximum Limit Sample

Location S ample

Frequency Sample

Type

Flow, mgd

--- --- --- --- --- Continuous Recording

Biochemical Oxygen Demand (BOD 5 ) 30 mg/l 45 mg/l

--- --- Influent and Effluent 3/week 24

- hr Composite 2,179 lb/day 3,268

lb/day

Total Suspended Solids (TSS) 30 mg/l 45 mg/l

--- --- Influent and Effluent 3/week 24

- hr Composite 2,333 lb/day 3,499

lb/day

Fecal Coliform Bacteria 1,2 100/100

ml --- --- --- Effluent 3/week Grab

pH, standard units 4 6. 1

- 9.0 Effluent Continuous Recording

Temperature, o C

--- --- --- -- - Effluent Continuous Recording 3

Hardness, mg/L CaCO 3 --- --- --- --- Effluent Monthly 24

- hr Composite

Chronic Whole Effluent Toxicity Annual, See Part I.C.Permit No.: WA0037168 Page 6 of 41

Table 1: Effluent Limitations and Monitoring Requirements

Parameter Effluent Limitations Monitoring Requirements

Average Monthly Limit Average

Weekly Limit Max

Daily Limit Instantaneous

Maximum Limit Sample

Location S ample

Frequency Sample

Type

Arsenic, Total Recoverable --- --- --- --- Influent and Effluent Quarterly

for 5 year s 24

- hr

C omposite

Arsenic, Inorganic --- --- --- --- Effluent Quarterly for 5 year s Quarterly

for 5 year s

Endosulfan
--- --- --- --- Effluent Quarterly for 5 years Quarterly

for 5 years

Copper, Total Recoverable 2 8.5 ug/L

--- 13.7 ug/L --- Effluent 1/month 24

- hr Composite

0. 99 lb/day 1.60

lb/day

Total Ammonia (as N) 2 November 1

– April 30 5.4 mg/L

--- 16.1 mg/L --- Effluent 2/week 24

- hr Composite

793 lb/day 2,622

lb/day

Total Ammonia (as N) 2 May 1

– October 31 4.2 mg/L

--- 12.0 mg/L --- Efflue nt 2/week 24

- hr Composite

490 lb/day 792

lb/day

Total Kjeldahl Nitrogen, mg/L --- --- --- --- Effluent 1/month 24

- hr Composite

Nitrogen, NO2+NO3, mg/L --- --- --- --- Effluent 1/month 24

- hr Composite

Total Phosphorus, mg/L --- --- --- --- Efflue nt 1/month 24

- hr CompositePermit No.: WA0037168 Page 7 of 41

Table 1: Effluent Limitations and Monitoring Requirements

Parameter Effluent Limitations Monitoring Requirements

Average Monthly Limit Average

Weekly Limit Max

Daily Limit Instantaneous

Maximum Limit Sample

Location S ample

Frequency Sample

Type

1. The geometric mean 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. See Part VI for a definition of geometric mean. 2. Reporting is required within 24 hours of a maximum daily limit or instantaneous maximum limit violation. See Sections I.B.2. and III.G.

3

. Continuous effluent monitoring shall begin within six months of the effective date of the permit. Tempera ture data must be recorded using a micro

- recording temperature devices known as thermistors. Set the recording device to record at one

- hour intervals. Report the following temperature monitoring data on the DMR: 1

- day maximum temperature and the 7

- day ave rage of the daily maximum temperatures ( 7

- DADMax). Use the temperature device manufacturer’s software to generate (export) an Excel text or electronic ASCII text file. The file must be submitted annually to Puyallup Tribe by January 31 for the previous m onitoring year along with the placement log

. The placement logs should include the following information for both thermistor deployment and retrieval: date, time, temperature device manufacturer ID, location, depth, whether it measured air or water tempera ture, and any other details that may explain data anomalies. 4. See I.B.4.

2. The permittee must report within 24 hours any violation of the maximum daily limits for copper and ammonia

. Violations of all other effluent limits are to be

re ported at the time that discharge monitoring reports are submitted (See III.B. and III.H.).

3. The permittee must not discharge any floating solids, visible foam in other than trace amounts, or oily wastes that produce a sheen on the surface of the receiving

water.

4. The pH must not be less than 6. 1 standard units (s.u.) nor greater than 9.0 standard units (s.u.). T he permittee shall maintain the pH within the range in Table 1 except excursions from the range are permitted subject to the following limitation s: (1) The total time during which the pH values are outside the required range of pH values shall not exceed 7 hours and 26 minutes in any calendar month; and
(2) No individual excursion from the range of pH values shall exceed 60 minutes.

5. Removal Requirements for BOD 5 and TSS: The monthly average effluent concentration must not exceed 15 percent of the monthly average influent concentration. Percent removal of BOD 5 and TSS must be reported on the Discharge Monitoring Reports (DMRs). For each parameter, the monthly average percent removal must be calculated from the arithmetic mean of the influent values and the arithmetic mean of the effluent values for that month. Influent and effluent samples must be taken over approximately the same time period.Permit No.: WA0037168 Page 8 of 41

6. Th e permittee must collect effluent samples from the effluent stream after the last treatment unit prior to discharge into the receiving waters.

7. For all effluent monitoring, the permittee must use sufficiently sensitive analytical methods which meet the following:
a) Parameters with an effluent limit. The method must achieve a minimum level (ML) less than the effluent limitation unless otherwise specified in Table 1 Effluent Limitations and Monitoring Requirements.
b) Parameters that do not have effluent limitations.
(i) The permittee must use a method that detects and quantifies the level of the pollutant, or
(ii) The permittee must use a method that can achieve a maximum ML less than or equal to those specified in Table 2 ; c) For parameters that do not have an effluent limit, the permittee may request different MLs. The request must be in writing and must be approved by EPA.
d) See also Part III.D. Monitoring Procedures

Table 2: Maximum MLs for Pollutants Not Subject to Effluent Limitations

Parameter Units Maximum ML

Arsen ic μg/L 0.5
Copper μg/L 1

TKN μg/L 100

NO2+NO3 as N μg/L 100
Total Phosphorus μg/L 100

Lead μg/L 0.5

Nickel μg/L 15

Zinc μg/L 30

8. For purposes of calculating monthly averages, zero may be assigned for values less than the MDL, and the {numeric value of the MDL} may be assigned for

va lues between the MDL and the ML. If the average value is less than the MDL, the permittee must report “less than {numeric value of the MDL}” and if the average value is less than the ML, the permittee must report “less than {numeric value of the ML}.” If a value is equal to or greater than the ML, the permittee must report and use the actual value.

9. The permittee must perform the effluent testing required by Part D of NPDES application Form 2A (EPA Form 3510-2A, revised 1 -99). The permittee must submit the results of this testing with its application for renewal of this NPDES permit. To the extent that effluent monitoring required by other conditions of this permit satisfies this requirement, these samples may be used to satisfy the

re quirements of this paragraph.Permit No.: WA0037168 Page 9 of 41

C. Whole Effluent Toxicity Testing Requirements

The permittee must conduct chronic toxicity tests on effluent samples from Outfall 001. Testing must be conducted in accordance with subsections 1 through 6, below.

1. Toxicity testing must be conducted on 24-hour composite samples of effluent. In addition, a split of each sample collected must be analyzed for the chemical and physical parameters required in Part I.B, above, with a required sampling frequency of once per month or more frequently, using the sample type required in P art I.B. For parameters for which grab samples are required in Part I.B, grab samples must be taken during the same 24-hour period as the 24-hour composite

sa mple used for the toxicity tests. When the timing of sample collection coincides with that of the sampling required in Part I.B, analysis of the split sample will fulfill the requirements of Part I.B as well.

2. Chronic Test Species and Methods
a) For Outfall 001

, short

- term chronic toxicity test s must be conducted annually. T he effluent collected for toxicity testing must be collected at the same time as the receiving water surface water monitoring (see Part I.D.).
b) The permittee must conduct the following two chronic toxicity tests on each sample, using the following species and protocols:
(i) Fathead minnow , Pimephales promelas, larval survival and growth test (method 1000.0 in EPA

- 821

- R

- 02

- 013)
(ii) Daphnid

, Ceriodaphnia dubia, survival and reproduction test (method 1002.0 in EPA-821-R-02-013)

c) The presence of chronic toxicity must be determined as specified in Short

Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms , Fourth Edition, EPA

- 821

- R

- 02

- 013

, October 2002.
d) Results must be reported in TU c (chronic toxic units), which is defined as follows:
(i) For survival endpoints, TU c = 100/NOEC.
(ii) For all other test endpoints, TU c = 100/IC 25 (iii) IC 25 means “25% inhibition concentration.” The IC 25 is a point estimate of the toxicant concentration, expressed in percent effluent, that c auses a 25% reduction in a non-quantal biological measurement (e.g., reproduction or growth) calculated from a continuous model (e.g., Interpolation Method).
(iv) NOEC means “no observed effect concentration.” The NOEC is the highest concentration of toxicant, expressed in percent effluent, to which organisms are exposed in a chronic toxicity test [full life-cycle or partial life-cycle (short term) test], that causes no observable adverse effects on the test organisms (i.e., the highest concentration ofPermit No.: WA0037168 Page 10 of 41
effluent in which the values for the observed responses are not statistically significantly different from the controls).

3. Quality Assurance
a) The toxicity testing on each organism must include a series of five test dilutions and a control

, a s follows:
(i) The chronic test dilutions must include the receiving water concentration (RWC), which is the dilution associated with the chronic toxicity trigger; two dilutions above the RWC, and; two dilutions below the RWC. The chronic RWC is 52.6 % effluen t. b) All quality assurance criteria and statistical analyses used for chronic tests and reference toxicant tests must be in accordance with Short-Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms, Fourth Edition, EPA/821-R-02-013, October 2002,

a nd individual test protocols.
c) In addition to those quality assurance measures specified in the methodology, the following quality assurance procedures must be followed:
(i) If organisms are not cultured in-house, concurrent testing with

re ference toxicants must be conducted. If organisms are cultured inhouse, monthly reference toxicant testing is sufficient. Reference toxicant tests must be conducted using the same test conditions as the effluent toxicity tests.
(ii) If either of the reference toxicant tests or the effluent tests do not meet all test acceptability criteria as specified in the test methods manual, the permittee must re-sample and re-test within 14 days of receipt of the test results.
(iii) Control and dilution water must be receiving water or lab water, as appropriate, as described in the manual. If the dilution water used is different from the culture water, a second control, using culture water must also be used. Receiving water may be used as control and dilution water upon notification of EPA. In no case shall water that has not met test acceptability criteria be used for either dilution or control.

4. Accelerated Testing.
a) For Outfall 001, the chronic toxicity trigger is 1.9 TU c . b) If chronic toxicity is detected above 1.9 TU c the permittee must conduct four (see also Part C.4.e., below) more biweekly tests over an eight week period. This accelerated testing must be initiated within two weeks of receipt of the test results that indicate an exc eedance.
c) The permittee must notify EPA of the exceedance in writing within two weeks of receipt of the test results. The notification must include the following information:Permit No.: WA0037168 Page 11 of 41
(i) A status report on any actions required by the permit, with a schedule for actions not yet completed.
(ii) A de scription of any additional actions the permittee has taken or will take to investigate and correct the cause(s) of the toxicity.
(iii) Where no actions have been taken, a discussion of the reasons for not taking action.
d) If none of the four accelerated tests exceed the toxicity trigger, the permittee may return to the normal testing frequency. If any of the four tests exceed the trigger, then the T oxicity R eduction E valuation requirements in Part I.C.5., shall apply.
e) Initial Investigation. If the permittee demonstrates through an evaluation of facility operations that the cause of the exceedance is known and corrective actions have been implemented, only one accelerated test is necessary. If toxicity exceeding 1.9 TU c is detected in this te st, then the T oxicity R eduction E valuation requirements in Part I.C.5. shall apply.

5. Toxicity Reduction Evaluation (TRE) and Toxicity Identification Evaluation (TIE):
a) If chronic toxicity is detected above 1.9 TU c in any of the accelerated tests under Part I .C.4., the permittee must initiate a TRE in accordance with EPA manual EPA 833

- B

- 99

- 002 ( Toxicity Reduction Evaluation Guidance for Municipal Wastewater Treatment Plants)

, within two weeks of the exceedance. At a minimum, the TRE must include:
(i) Further actions to investigate and identify the cause of toxicity;
(ii) Actions the permittee will take to mitigate the impact of the discharge and to prevent the recurrence of toxicity; and
(iii) A schedule for these actions.
b) The permittee may initiate a TIE as part of the over all TRE process , using as guidance the methods described in the EPA acute and chronic TIE manuals EPA/600/6

- 91/005F (Phase I), EPA/600/R

- 92

- 080 (Phase II), and EPA/600/R

- 92

- 081

. c) If a TIE is initiated prior to completion of the accelerated testing, the

ac celerated testing schedule may be terminated, or used as necessary in performing the TIE.

6. Reporting
a) The permittee must submit the results of the toxicity tests with the discharge monitoring reports (DMR) for the month following recei pt of the results from the lab

. b) The permittee must submit the results of any accelerated testing required under Part I.C.4. within 2 weeks of receipt of the results from the lab. The full report must be submitted within 4 weeks of receipt of the results from the lab.Permit No.: WA0037168 Page 12 of 41
If an initial investigation indicates the source of toxicity and accelerated testing is unnecessary, the result of the investigation must be submitted with the DMR for the month following completion of the investigation.
c) The report of toxicity test results must include all relevant information outl ined in Section 10, Report Preparation, of Short-Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms, Fourth Edition, EPA/821-R-02-013, October 2002. In

a ddition to toxicity test results, the permittee must report: dates of sample collection and initiation of each test; flow rate at the time of sample collection; and the results of the monitoring required in Part I.B of this permit, for parameters with a required monitoring frequency of monthly or more frequently.

D. Surface Water Monitoring The permittee must conduct surface water monitoring. The program must meet the following requirements:
Surface water monitoring must meet the following requirements:

1. Working with the Puyallup Tribe, the permittee must develop a receiving water monitoring plan. This plan must include a continuous temperature monitoring plan for both effluent temperature monitoring and surfac e water temperature monitoring. Existing plans that meet the requirements of this section can be used provided any new modifications to the monitoring schema or schedule below are incorporated into the existing plan.

2. Working with the Puyallup Tribe, the permittee must establish monitoring station s in the Puyallup River. The upstream monitoring station must be upstream of the facility’s outfall, at a minimum distance of 100 feet from the facility’s outfall. The downstream monitoring station must be established at a maximum distance of 302 feet belo w the facility’s outfall at the edge of the mixing zone (i.e. at a point where the effluent and the receiving water are completely mixed).

3. To the extent possible, the receiving water samples must occur on the same day as the effluent sample collection.

4. To the extent possible, the downstream receiving water samples must be collected during critical conditions. Working with the Puyallup Tribe, the permittee must establish critical conditions.

5. Quality assurance/quality control for all monitoring must be documented in the Quality Assurance Plan required under Part I.D, Quality Assurance Plan.

6. Samples must be analyzed for the parameters listed in Table 3 . Copper must be analyzed as dissolved . Arsenic must be analyzed as dissolved ( relates to water quality criter ion ), inorganic (relates to human health criterion ), and total recoverable. Mercury must be analyzed as total recoverable.

7. The flow rate must be measured as near as practicable to the time that other ambient parameters are sampled.Permit No.: WA0037168 Page 13 of 41

8. With the exception of ar senic s amples must achieve method detection limits (MDLs) that are equivalent to or less than those listed in Table 3 except for arsenic . The permittee may request different MDLs. The request must be in writing and must be approved by EPA.
For arsenic the permittee must use sufficiently sensitive analytical methods which detect and quantifies the level of arsenic or a method that can achieve a maximum MDL less than or equal to those specified in Table 3.

Table 3 : Surface Water Monitoring Requirements in the Puyallup River

Parameter Units Upstream Sampling Frequency Downstream

Sampling Frequency Sampling Method Max

MDL (ug/L)

Total Ammonia as N mg/L Once/ year Once/ year Grab 10

Temperature 3 oC Continuous Continuous Recording NA

pH standard

units Once / year Once/year Grab NA

Hardness as CaCO 3 mg/L Once/ year Once/year Grab NA

Arsenic, total ug/L Quarterly for five years

--- Grab 0.5

Arsenic, dissolved ug/L Quarterly for five years

--- Grab 0.5

Arsenic, inorganic ug/L Quarterly for five years

--- Grab 0.0 36

Copper , dissolved ug/L Once/ year Once/ year Grab 1

Mercury, total ug/L Once/ year Once/year Grab 0 .0018 2

Lead ug/L Once/year Once/year Grab 1.0

Zinc ug/L Once/year Once/year Grab 0.05

Note: 1 Ambient arsenic monitoring for total, inorganic, and di ssolved arsenic quarterly as part of Special Condition II. B., Arsenic Monitoring.

2 Methods 1631E or 245.7 must be used. The permittee must achieve a MDL of 1.8 ng/L and a ML of 5.0 ng/L (0.005 μg/L).

3. Continuous effluent monitoring shall begin within si x months of the effective date of the permit. Temperature data must be recorded using a micro

- recording temperature devices known as thermistors. Set the recording device

to record at one

- hour intervals. Report the following temperature monitoring data on the DMR: 1

- day maximum temperature a nd the 7

- day average of the daily maximum temperatures ( 7

- DADMax).
Use the temperature device manufacturer’s software to generate (export) an Excel text or electronic ASCII text file. The file must be submitted annua lly to the Puyallup Tribe by January 31 for the previous monitoring year along with the placement log

. The placement logs should include the following information for both thermistor deployment and retrieval: date, time, temperature device manufacturer ID, location, depth, whether it measured air or water temperature, and any other details that may explain data anomalies

9. Receiving water monitoring results must be submitted to the EPA and the Puyallup Tribe Environmental Department with the application for a new permit

.Permit No.: WA0037168 Page 14 of 41

10. Surface water monitoring results must be reported on the DMR.



### II. Special Conditions

A. Pretreatment Requirements
1. Implementation
The permittee must implement its pretreatment program in accordance with the legal authorities, policies, procedures, staffing levels and financial provisions de scribed in its original approved pretreatment program submission entitled City of Puyallup Source Control Program and submitted to EPA on December 14, 2007

, any program amendments submitted thereafter and approved by EPA, and the g eneral p retreatment regulations (40 CFR 403) and any amendments thereof. At a minimum, the permittee must carry out the following activities:
a) Enforce prohibitive discharge standards as set forth in 40 CFR 403.5(a) and (b), categorical pretreatment standards promulgated pursuant to Section 307(b) and (c) of the Act (where applicable), and local limitations and BMPs developed by the permittee in accordance with 40 CFR 403.5(c), whichever are more stringent and are applicable to non-domestic users discharging wastewater into the permittee's collection system. Locally derived limitations must be defined as pretreatment standards under Section 307(d) of the Act.
b) Implement and enforce the requirements of the most recent and EPAapproved portions of local law and regulations (e.g. municipal code, sewer use ordinance) addressing the regulation of non-domestic users.
c) Update its inventory of non-domestic users at a frequency and diligence adequate to ensure proper identification of non-domestic users subject to pretreatment standards, but no less than once per year. The permittee must notify these users of applicable pretreatment standards in accordance with 40 CFR 403.8(f)(2)(iii).
d) Issue, reissue, and modify, in a timely manner, industrial wastewater discharge permits to at least all Significant Industrial Users (SIUs) and categorical industrial users. These documents must contain, at a minimum, conditions identified in 40 CFR 403.8(f)(1)(iii), including Best Management Practices, if applicable. The permittee must follow the methods described in its implementation procedures for issuance of individual permits.
e) Develop and maintain a data management system designed to track the status of the permittee's non-domestic user inventory, non-domestic user discharge characteristics, and their compliance with applicable pretreatment standards and requirements. The permittee must retain all records relating to its pretreatment program activities for a minimum of three years, as required by 40 CFR 403.12(o), and must make such records available to EPA upon

re quest. The permittee must also provide public access to information considered effluent data under 40 CFR 2.Permit No.: WA0037168 Page 15 of 41
f) Establish, where necessary, legally binding agreements with contributing jurisdictions to ensure compliance with applicable pretreatment requirements in 40 CFR Part 403 by industrial users within these jurisdictions. These legally binding agreements must identify the agency responsible for the various pretreatment implementation and enforcement activities in the contributing jurisdiction and outline the specific roles, responsibilities and pretreatment activities of each jurisdiction.
g) Carry out inspections, surveillance, and monitoring of non-domestic users to determine compliance with applicable pretreatment standards and

re quirements. A complete inspection of all SIUs and sampling of all SIUs’ effluent must be conducted at least annually.
h) Require SIUs to conduct wastewater sampling as specified in 40 CFR 403.12(e) or (h). Frequency of wastewater sampling by the SIUs must be appropriate for the character and volume of the wastewater but no less than twice per year. Sample collection and analysis must be performed in accordance with 40 CFR 403.12(b)(5)(ii) through (v) and 40 CFR 136. In cases where the Pretreatment Standard requires compliance with a Best Management Practice or pollution prevention alternative, the permittee must require the User to submit documentation to determine compliance with the Standard. If the permittee elects to conduct all non-domestic user monitoring for any SIU instead of requiring self-monitoring, the permittee must conduct sampling in accordance with the requirements of this paragraph, and the requirements of 40 CFR 403.12(g)(2).
i) Enforce and obtain remedies for any industrial user noncompliance with applicable pretreatment standards and requirements. This must include timely and appropriate reviews of industrial reports to identify all violations of the user's permit, the local ordinance, and federal pretreatment standards and requirements. Once violations have been uncovered, the permittee must take timely and appropriate action to address the noncompliance. The permittee's enforcement actions must follow its EPA-approved enforcement response procedures.
j) Publish, at least annually, in a newspaper or newspapers of general circulation that provides meaningful public notice within the jurisdiction(s) served by the POTW, a list of all non-domestic users which, at any time in the previous 12 months, were in significant noncompliance as defined in 40 CFR 403.8 (f)(2)(viii).
k) Maintain adequate staff, funds and equipment to implement its pretreatment

program. l) Conduct an analysis annually to determine whether influent pollutant loadings are approaching the maximum allowable headworks loadings calculated in the

pe rmittee’s most recent local limits calculations. Any local limits found to be inadequate by this analysis must be revised. The permittee may be required to revise existing local limits or develop new limits if deemed necessary by EPA.Permit No.: WA0037168 Page 16 of 41

2. Spill Prevention and Slug Discharges
The permittee must implement an accidental spill prevention program to reduce and prevent spills and slug discharges of pollutants from non-domestic users.
a) Control mechanisms for SIUs must contain requirements to control slug discharges if determined by the POTW to be necessary [40 CFR 403.8(f)(1)(iii)(B)(6)].
b) SIUs must be evaluated for the need for a plan or other action to control slug discharges within 1 year of being designated an SIU. For IUs designated as significant prior to November 14, 2005, this evaluation must be conducted by October 14, 2006 [40 CFR 403.8(f)(2)(vi)].
c) SIUs must notify the POTW immediately of any changes at their facilities affecting the potential for a slug discharge [40 CFR 403.8(f)(2(vi)].

3. Enforcement Requirement
Whenever EPA finds, on the basis of any available information, that the owner or operator of any source is introducing a pollutant into the POTW in violation of national pretreatment standards, including prohibited discharges, local limits, or categorical standards, or has caused interference or pass through, EPA may notify the owner or operator of the POTW of such violation. If, within 30 days after such notification has been sent by EPA to the POTW, the POTW fails to

c ommence appropriate enforcement action to correct the violation, EPA may take appropriate enforcement action under the authority provided in section 309(f) of the Cl ean Water Act.

4. Modification of the Pretreatment Program
If the permittee elects to modify any components of its pretreatment program, it must comply with the requirements of 40 CFR 403.18. No substantial program modification, as defined in 40 CFR 403.18(b), may be implemented prior to receiving written authorization from EPA.

5. Local Limits Evaluation
By December 31 , 201 5 , the permittee must submit to EPA a complete local limits evaluation pursuant to 40 CFR 403.5(c)(1) . The study must take into account water quality in the receiving stream, inhibition levels for biological processes in th e treatment plant, and sludge quality goals. The study must address at least the following pollutants: arsenic, 5

- day biochemical oxygen demand, cadmium, chromium, copper, cyanide, lead, mer cury, molybdenum, nickel, selenium, silver, total suspended soli ds, and zinc and any other pollutants of concern. The permittee must address total ammonia as N if the POTW accepts non

- domestic discharges of ammonia. Submitted results of the study must include proposed local limits, maximum allowable headworks loading s, all supporting calculations, and all assumptions.

6. Control of Undesirable PollutantsPermit No.: WA0037168 Page 17 of 41
The permittee must not allow introduction of the following pollutants into the publicly owned treatment works (POTW):
a) Pollutants which will create a fire or explosion hazard in the POTW, including, but not limited to, wastestreams with a closed cup flashpoint of less than 140 oF or 60 oC using the test methods specified in 40 CFR 261.21;
b) Pollutants which will cause corrosive structural damage to the POTW, but in

no case, discharges with a pH lower than 5.0, unless the POTW is designed to accommodate such discharges;
c) Solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW (including the collection system) resulting in interference;
d) Any pollutant, including oxygen demanding pollutants (BOD, etc.), released in a discharge at a flow rate and/or pollutant concentration which will cause interference with the POTW;
e) Heat in amounts which inhibit biological activity in the POTW resulting in interference, but in no case heat in such quantities that the temperature at the POTW treatment plant exceeds 40 oC (104 oF) unless the Regional Administrator, upon request of the POTW, approves alternate temperature limits;
f) Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass through;
g) Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause acute worker health and safety problems; and
h) Any trucked or hauled pollutants, except at discharge points designated by the POTW.

7. Requirements for Industrial users
The permittee must require any industrial user of its treatment works to comply with any applicable requirements in 40 CFR 403 through 471.

8. Sampling Requirements
a) Parameters: The permittee must sample influent and effluent from the POTW for arsenic, cadmium, chromium, copper, cyanide, lead, mercury, molybdenum, nickel, selenium, silver, and zinc. Metals must be analyzed and reported as total metals. If the POTW accepts ammonia from industrial sources, the permittee must also sample the POTW influent and effluent for ammonia. The permittee must sample sludge for arsenic, cadmium, copper, lead, mercury, molybdenum, nickel, percent solids, selenium and zinc.
b) Frequency: Sampling must be conducted twice per year: once between January 1 and June 30 and once between July 1 and December 31, the two sampling events must be approximately 6 months apart.Permit No.: WA0037168 Page 18 of 41
Sampling Locations and Sample Type: The permittee must sample as described in Table 4

.

Table 4 : Pretreatment Monitoring

- Sample Types and Frequency

Wastestream Sample Type Frequency

Influent 24

- hour Composite 1 3 days within a week (Mon

- Fri)

Effluent 24

- hour Composite 1 3 days w ithin a week (Mon

- Fri)

Sludge Grab Once, during the same time period that influent and effluent samples are being taken

Note: Influent and effluent samples for cyanide must be collected and analyzed as required in paragraph H.8. of this Part

. c) Analytical Methods: For influent and effluent pretreatment sampling, the permittee must use EPA-approved analytical methods that achieve the method detection limits (MDLs) or minimum level (ML) in Table 5

, unless higher detection limits are approved by EPA. Requests for higher MDLs for pretreatment monitoring must be submitted in writing to the Pretreatment Coordinator at the address in paragraph 8, below.

Table 5 : Method Detection Limits

Parameter MDL/ML, μg/l

Arsenic 0.5

Cadmium 0.1

Chromium 1.0 Copper 1.0 Cyanide 5.0

Lead 1.0 Mercury 0.00 5

Nickel 1.0

Silver 0.2

Zinc 0.05

d) Sludge Sampling: Sludge samples must be taken as the sludge leaves the dewatering device or digesters.
e) Sludge Reporting: Metals concentrations in sludge must be reported in mg/kg, dry weight.
f) Reporting Results: Analytical results for each day’s samples must be reported separately. Sample results must be submitted with the pretreatment annual report required in paragraph I., below.
g) Cyanide sampling: Influent and effluent sampling for cyanide must be conducted as follows. Eight discrete grab samples must be collected over aPermit No.: WA0037168 Page 19 of 41

24 -hour day. Each grab sample must be at least 100 ml. Each sample must be checked for the presence of chlorine and/or sulfides prior to preserving and compositing (refer to Standard Methods, 4500-CN B). If chlorine and/or sulfides are detected, the sample must be treated to remove any trace of these parameters. After testing and treating for the interference compounds, the pH of each sample must be adjusted, using sodium hydroxide, to 12.0 standard units. Each sample can then be composited into a larger container which has been chilled to 4 degrees Celsius, to allow for one analysis for the day.
h) Toxic organics sampling: The permittee must perform chemical analyses of its influent, effluent, and sludge for all specific toxic organic pollutants listed in Table II of Appendix D of 40 CFR 122.
(i) Sample Type: The influent and effluent samples must be 24-hour composites, except when sampling volatiles.
(ii) Frequency: Sampling must be conducted once p er year. (iii) Volatile Organics Sampling: eight discrete samples must be collected over the 24 hour day using 40 ml VOC vials with teflon septa. During sampling, the flow from the discharge will be controlled to produce smooth laminar flow to prevent agitation and aeration of the sample. The VOC vials will be filled to the top such that there is a meniscus present. There must be no visible air space or air bubbles in the VOC vials when capped. A single analysis for volatile pollutants may be run for each monitoring day by compositing equal volumes of the individual discrete VOC vials (at the analytical laboratory using extreme care not to introduce air/air bubbles) directly into the GC purge and trap apparatus, with no less than 1 ml of each grab included in the composite. The composite sample must be analyzed immediately.
(iv) GC/MS Analysis: In addition to analyzing for pollutants specified in the previous paragraph, the permittee must make a reasonable attempt using GC/MS analytical techniques to identify and quantify the ten most abundant constituents of each effluent extract (excluding toxic organic pollutants and unsubstituted aliphatic compounds) shown to b e present by peaks on the total ion plots (reconstructed gas chromatograms). Identification must be attempted through the use of the USEPA/NIH computerized library of mass spectra, with visual confirmation by an experienced analyst. Quantification may be an orde r- of -magnitude estimate based upon comparison with an internal standard.
(v) Sample Handling: All samples must be prepared, preserved, shipped, and analyzed in accordance with USEPA Methods 624 and 625.

9. Pretreatment Report
a) The permittee must submit an annual report pursuant to 40 CFR 403.12(i) that de scribes the permittee’s program activities over the January 1 – December 31Permit No.: WA0037168 Page 20 of 41
report year. This report must be submitted to the following addresses no later than February 15 of each year:
orig inal to:

Pretreatment Coordinator

U.S. Environmental Protection Agency Region 10, OWW-130 1200 Sixth Avenue, Suite 900 Seattle, WA 98101-3140

copy to: The Puyallup Tribe

Environmental Department 3009 E. Portland Ave, Tacoma, WA 98404 copy to:

Pretreatment Coord inator

Department of Ecology, Southwest Regional Office P.O. Box 47775 Olympia, WA 98504-7775

b) The pretreatment report must be compiled following the Region 10 Annual Report Guidance. At a minimum, the report must include:
(i) An updated non-domestic user inventory, including those facilities that are no longer discharging (with explanation), and new dischargers, appropriately categorized and characterized. Categorical users should have the applicable category noted as well as cases where more stringent local limits apply instead of the categorical standard.
(ii) R esults of wastewater and sludge sampling at the POTW as specified in Part II.A.8 (above).
(iii) Calculations of removal rates for each pollutant for each day of sampling.
(iv) An analysis and discussion of whether the existing local limitations in the permittee's sewer use ordinance continue to be appropriate to prevent treatment plant interference and pass through of pollutants that could affect water quality or sludge quality. This should include a comparison between influent loadings and the most recent relevant maximum allowable headworks loadings calculated for the treatment plant.
(v) Status of program implementation, including:
(a) Any planned modifications to the pretreatment program that have been approved by EPA, including staffing and funding updates.Permit No.: WA0037168 Page 21 of 41
(b) A description of any interference, upset, or NPDES permit violations experienced at the POTW which were directly or indirectly attributable to non-domestic users, including:
(i) Date & time of the incident
(ii) Description of the effect on the POTW’s operation
(iii) Effects on the POTW’s effluent and biosolids quality
(iv) Identification of suspected or known sources of the discharge causing the upset
(v) Steps taken to remedy the situation and to prevent recurrence
(c) Listing of non-domestic users inspected and/or monitored during the report year with dates and an indication compliance status.
(d) Listing of non-domestic users planned for inspection and/or monitoring for the coming year along with associated frequencies.
(e) Listing of non-domestic users whose permits have been issued, reissued, or modified during the report year along with current permit expiration dates.
(f) Listing of non-domestic users notified of promulgated pretreatment standards and/or local standards during the report year as required in 40 CFR 403.8(f)(2)(iii).
(g) Listing of non-domestic users notified of promulgated pretreatment standards or applicable local standards who are on compliance schedules. The listing must include the final date of compliance for each facility.
(vi) Status of enforcement activities including:
(a) Listing of non-domestic users who failed to comply with applicable pretreatment standards and requirements, including:
(i) Summary of the violation(s).
(ii) Enforcement action taken or planned by the permittee.
(iii) Present compliance status as of the date of preparation of the pretreatment report. (b) Listing of those users in significant noncompliance during the report year as defined in 40 CFR 403.8(f)(2)(viii) and a copy of the newspaper publication of those users’ names.
(c ) EPA may require more frequent reporting on those users who are determined to be in significant noncompliance.

B. Arsenic Monitoring The permittee must conduct arsenic monitoring for five years to assist in determining if there is reasonable potential for inorganic arsenic to exceed human health criteria

.Permit No.: WA0037168 Page 22 of 41
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 quarterly ( coinciding where possible with quarterly arsenic monitoring of plant influent and effluent) for five years

. The monitoring results must be submitted to EPA with the application for permit renewal and on the DMRs

.

C. Mercury Minimization Plan The permittee must develop and implement a mercury minimization plan that identifies potential sources of mercury and the measures to reduce or eliminate mercury loading. Written notice must be submitted to the EPA and Tribe that the plan has been developed and implemented within 90 days of the effective date of this permit. Any existing emergency response and public notification p l an may be modified fo r compliance with this section. The mercury minimization plan should include the following:

1. A program plan which includes the permittee’s commitments for:
a) Identification of potential sources of mercury that contribute to discharge concentrations (includes a review of existing data);
b) Reasonable, cost-effective activities to reduce or eliminate mercury loadings from identified sources;
c) Tracking mercury source reduction implementation and mercury source monitoring;
d) Quarterly monitoring of POTW influent and effluent;
e) Resources and staffing;

2. Implementation of cost-effective control measures for direct and indirect contributors; and

3. An annual status report submitted to the EPA and Tribe, which includes:
a) A list of potential mercury sources;
b) A summary of actions taken to reduce or eliminate mercury discharges to progress toward meeting water quality standards;
c) Mercury source reduction implementation, source monitoring results, influent and effluent, and results for the previous year; and proposed revisions to the program plan based on findings from the previous year.

D. Lead and Zinc Study By November 1

, 2016, the permittee must complete a study to determine the source(s) of lead and zinc in the wastewater treatment plant effluent and identify opportunities for reduction of lead and zinc levels at the source. Submit the study to the Tribe, EPA, and Ecology.Permit No.: WA0037168 Page 23 of 41

E. Operation and Maintenance Plan In addition to the requirements specified in Section IV.E. of this permit (Proper Ope ration and Maintenance), the permittee must provide written notice to EPA that an operations and maintenance plan for the current wastewater treatment facility has been updated as needed and is being implemented within 180 days of the effective date of this permit. The plan shall be retained on site and made available on request to EPA and the Puyallup Tribe. Any changes occurring in the operation of the plant sha ll be reflected within the Operation and Maintenance plan.

F. Quality Assurance Plan (QAP) The permittee must develop a quality assurance plan (QAP) for all monitoring required by this permit. The permittee must submit written notice to EPA that the P lan has been developed and implemented within 180 days of the effective date of this permit. Any existing QAPs may be modified for compliance with this section.

1. The QAP must be designed to assist in planning for the collection and analysis of effluent and receiving water samples in support of the permit and in explaining data anomalies when they occur.

2. Throughout all sample collection and analysis activities, the permittee must use the EPA-approved QA/QC and chain-of-custody procedures described in EPA Requirements for Quality Assurance Project Plans (EPA/QA/R-5) and Guidance for Quality Assurance Project Plans (EPA/QA/G-5). The QAP must be prepared in the format that is specified in these documents.

3. At a minimum, the QAP must include the following:
a) De tails on the number of samples, type of sample containers, preservation of samples, holding times, analytical methods, analytical detection and quantitation limits for each target compound, type and number of quality assurance field samples, precision and accuracy requirements, sample preparation requirements, sample shipping methods, and laboratory data delivery requirements.
b) Map(s) indicating the location of each sampling point.
c) Qualification and training of personnel.
d) Name(s), address(es) and telephone number(s) of the laboratories used by or proposed to be used by the permittee.

4. The permittee must amend the QAP whenever there is a modification in sample collection, sample analysis, or other procedure addressed by the QAP.

5. Copies of the QAP must be kept on site and made available to EPA and/or the P uyallup Tribe upon request.

G. F acility Planning Requirement Each year, the permittee must compute an annual average value for the flow, BOD5 loading, and TSS loading entering the facility based on the previous twelve monthsPermit No.: WA0037168 Page 24 of 41
data. If the facility has completed a plant upgrade that affects the facility planning values listed in Table 6 , only the data collected after the upgrade should be used in determining the annual average value.
When the annual average values exceed 85% of the facility planning values listed in Table 6, the permittee must develop a facility plan and schedule within one year from the date of the first exceedance. The plan must include the permittee’s strategy for continuing to maintain compliance with effluent limits and will be made available to the Director, the Puyallup Tribe, or an authorized representative upon request.

Table 6

- Facility Planning

Criteria Value Units

Maximum Month Flow 13.98 mgd

Influent BOD 5 Loading 14,525 lbs/day
Influent TSS Loading 15,550 lbs/day

H. Emergency Response and Public Notification Plan
1. The permittee must develop and implement an overflow emergency response and public notification plan that identifies measures to protect public health from overflows that may endanger health and unanticipated bypasses or upsets that exceed any effluent limitation in the permit. At a minimum the plan must include mechanisms to:
a) Ensure that the permittee is aware (to the greatest extent possible) of all overflows from portions of the collection system over which the permittee has ownership or operational control and unanticipated bypass or upset that exceed any effluent limitation in the permit;
b) Ensure appropriate responses including assurance that reports of an overflow or of an unanticipated bypass or upset that exceed any effluent limitation in the permit are immediately dispatched to appropriate personnel for investigation and response;
c) Ensure immediate notification to the public, health agencies, and other affected public entities (including public water systems). The overflow response plan must identify the public health and other officials who will receive immediate notification;
d) Ensure that appropriate personnel are aware of and follow the plan and are

a ppropriately trained; and
e) Provide emergency operations.

2. The permittee must submit written notice to EPA and the Puyallup Tribe that the plan ha s been developed and implemented within 180 days of the effective date of this permit. Any existing emergency response and public notification plan may be modified for compliance with this section.Permit No.: WA0037168 Page 25 of 41



### III. Monitoring, Recording and Reporting Requirements

A. Representative Sampling (Routine and Non-Routine Discharges) Samples and measurements must be representative of the volume and nature of the monitored discharge.
In order to ensure that the effluent limits set forth in this permit are not violated at times other than when routine samples are taken, the permittee must collect additional samples at the appropriate outfall whenever any discharge occurs that may reasonably be expected to cause or contribute to a violation that is unlikely to be detected by a routine sample. The permittee must analyze the additional samples for thos e parameters limited in Part I.B. of this permit that are likely to be affected by the discharge.
The permittee must collect such additional samples as soon as the spill, discharge, or bypassed effluent reaches the outfall. The samples must be analyzed in accordance with paragraph II I.C (“Monitoring Procedures”). The permittee must report all additional monitoring in accordance with paragraph II I.D (“Additional Monitoring by Permittee”).

B. Reporting of Monitoring Results During the period between the effective date of the permit and six months from the effective date of the permit, the permittee must either submit monitoring data and other reports in paper form, or must report electronically using NetDMR, a web-based tool that allows permittees to electronically submit DMRs and other required reports via a secure internet connection.

After six months of the effective date of the permit, the permittee must submit monitoring data and other reports electronically using NetDMR to the EPA. The permittee must continue to provide paper copy submissions to Puyallup Tribe after electronic submission to EPA has started, and continue for the duration of the permit.
Specific requirements regarding submittal of data and reports in paper copies, and submittal using NetDMR are described below.

1. Paper Copy Submissions
Monitoring data must be submitted using the DMR form (EPA No. 3320-1) or equivalent and must be postmarked by the 20 th day of the month following the completed reporting period. The permittee must sign and certify all DMRs, and all other reports, in accordance with the requirements of Part V.E, of this permit Signatory Requirements. The permittee must submit the legible originals of these documents to the Director, Office of Compliance and Enforce ment, with copies to the Puyallup Tribe at the following addresses below:Permit No.: WA0037168 Page 26 of 41
US EPA Region 10 Attn: ICIS Data Entry Team 1200 Sixth Avenue, Suite 900 OCE -133 Seattle, Washington 98101-3140

The Puyallup Tribe Environmental Department 3009 E. Portland Ave, Tacoma, WA 98404
Department of Ecology Southwest Regional Office P.O. Box 47775 Olympia, WA 98504-7775

2. Electronic Copy Submissions to EPA
a) Monitoring data must be submitted electronically to EPA no later than the 20 th of the month following the completed reporting period. All reports required under this permit must be submitted to EPA as a legible electronic attachment to the DMR. The permittee must sign and certify all DMRs, and all other reports, in accordance with the requirements of Part V.E, of this permit Signatory Requirements

. Once a permittee begins submitting reports using NetDMR, it will no longer be required to submit paper copies of DMRs or other reports to EPA or the Department of Ecology

. Paper submissions to the Puyallup Tribe remains unchanged and shall continue for the duration of the permit.
b) The permittee may use NetDMR after requesting and receiving permission from US EPA Region 10. NetDMR is accessed from http://www.epa.gov/netdmr

. 3. Annual Report to U.S. Fish and Wildlife Service, Washington Office (USFWS) National Marine Fisheries Service (NMFS) and the Puyallup Tribe.
a) The City of Puyallup shall provide an annual report to the USFWS, NMFS and the Puyallup Tribe by February 15 each year. The annual report shall

c ompile and summarize data and information from Discharge Monitoring Reports submitted by the City of Puyallup, and shall include the following:

(i) A summary of maximum reported effluent discharge concentration
(ii) A summary of any reported effluent limit violations.
(iii) A summary of any reported emergency and/or non-compliance events, including any instances when the WWTP discharged under bypass or upset conditions.
(iv) A summary of surface/receiving water monitoring data.
(v) Results of annual Whole Effluent Toxicity testing.
(vi) A summary if there have been any significant revisions to the facility operation and maintenance (O&M) plan.Permit No.: WA0037168 Page 27 of 41
b) The City of Puyallup shall submit annual reports to the USFWS, Western Washington Office in Lacey, Washington
US Department of Interior US Fish and Wildlife Service Western Washington Office US Fish and Wildlife Office 510 Desmond Drive SE, Suite 102 Lacey, WA 98503-1273
Attn: Federal Activities Branch, Division of Consultation and Conservation Planning) : c) The City of Puyallup shall submit annual reports to the NMFS, Northwest Region in Seattle , Washington ( NMFS Tracking No. 2012/1103 ) : United States Department of Commerce National Oceanic and Atmospheric Administration National Marine Fisheries Service Lacey Offi ce 510 Desmond Drive Southeast, Suite 103 Lacey, WA 98503

Att: Scott Anderson
d) In substitute for any part of the annual report, the City of Puyallup may instead choose to send an electronic (e-mail) notification directing the USFS and NMFS to specific, rel evant information which is available on

- line (e.g., the EPA's Envirofacts web

- site). Email notification shall be given once annually by February 15 each year of the permit term (2012

- 2017), to the USFS Federal Activities Branch, Division of Consultation a nd Conservation Planning , the NMFS Lacey Office and the Puyallup Tribal Office

. I dentify for the USFWS Reference No. 13410

- 2011

- F

- 0148 and identify for the NMFS Office, NMFS Tracking No. 2012/1103

.

C. Monitoring Procedures Monitoring must be conducted according to test procedures approved under 40 CFR 136, unless other test procedures have been specified in this permit or approved by EPA as an alternate test procedure under 40 CFR 136.5.

D. Additional Monitoring by Permittee If the permittee monitors any pollutant more frequently than required by this permit, using test procedures approved under 40 CFR 136 or as specified in this permit, the permittee must include the results of this monitoring in the calculation and reporting of the data submitted in the DMR.
Upon request by EPA, the permittee must submit results of any other sampling, regardless of the test method used.Permit No.: WA0037168 Page 28 of 41

E. Records Contents Records of monitoring information must include:

1. the date, exact place, and time of sampling or measurements;

2. the name(s) of the individual(s) who performed the sampling or measurements;

3. the date(s) analyses were performed;

4. the names of the individual(s) who performed the analyses;

5. the analytical techniques or methods used; and

6. the results of such analyses.

F. Retention of Records The permittee must retain records of all monitoring information, including, all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by this permit, copies of DMRs, a copy of the NPDES permit, and records of all data used to complete the application for this permit, for a period of at least five years from the date of the sample, measurement, report or application. This period may be extended by request of EPA.

G. Twenty -four Hour Notice of Noncompliance Reporting
1. The permittee must report the following occurrences of noncompliance by telephone within 24 hours from the time the permittee becomes aware of the circumstances:
a) any noncompliance that may endanger health or the environment;
b) any unanticipated bypass that exceeds any effluent limitation in the permit (Se e Part IV.F., “Bypass of Treatment Facilities”);
c) any upset that exceeds any effluent limitation in the permit (See Part IV.G.,

“ Upset Conditions”); or
d) any violation of a maximum daily discharge limitation for applicable pollutants identified in Part I.B.
e) a ny overflow prior to the treatment works over which the permittee has

owne rship or has operational control. An overflow is any spill, release or diversion of municipal sewage including:
(i) an overflow that results in a discharge to waters of the United States; and
(ii) an overflow of wastewater, including a wastewater backup into a building (other than a backup caused solely by a blockage or other malfunction in a privately owned sewer or building lateral) that does not reach waters of the United States.Permit No.: WA0037168 Page 29 of 41

2. The permittee must also provide a written submission within five days of the time that the permittee becomes aware of any event required to be reported under subpart 1 above. The written submission must contain:
a) a description of the noncompliance and its cause;
b) the period of noncompliance, including exact dates and times;
c) the estimated time noncompliance is expected to continue if it has not been corrected; and
d) steps taken or planned to reduce, eliminate, and prevent recurrence of the noncompliance.
e) if the noncompliance involves an overflow, the written submission must contain:
(i) The location of the overflow;
(ii) The receiving water (if there is one);
(iii) An estimate of the volume of the overflow;
(iv) A description of the sewer system component from which the release occurred (e.g., manhole, constructed overflow pipe, crack in pipe);
(v) The estimated date and time when the overflow began and stopped or will be stopped;
(vi) The cause or suspected cause of the overflow;
(vii) Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the overflow and a schedule of major milestones for those steps;
(viii) An estimate of the number of persons who came into contact with wastewater from the overflow; and
(ix) Steps taken or planned to mitigate the impact(s) of the overflow and a schedule of major milestones for those steps.

3. The Director of the Office of Compliance and Enforcement may waive the written report on a case- by -case basis if the oral report has been received within 24 hours by the NPDES Compliance Hotline in Seattle, Washington, by telephone, (206) 553 -1846.

4. Reports must be submitted to the three addresses in Part II I.B (“Reporting of Monitoring Results”). The reports must be sent to the Puyallup Tribe and to Ec ology even if NetDMR is being used to submit documentation to EPA.

H. Other Noncompliance Reporting The permittee must report all instances of noncompliance, not required to be reported within 24 hours, at the time that monitoring reports for Part III.B (“Reporting of Monitoring Results”) are submitted. The reports must contain the information listed in Part II I.G.2 of this permit (“Twenty-four Hour Notice of Noncompliance Reporting”).Permit No.: WA0037168 Page 30 of 41

I. Public Notification The permittee must immediately notify the public, health agencies and other affected entities (e.g., public water systems) of any overflow which the permittee owns or has

ope rational control; or any unanticipated bypa ss or upset that exceeds any effluent limitation in the permit in accordance with the notification procedures developed in

a ccordance with Part II.F.

J. Notice of New Introduction of Toxic Pollutants The permittee must notify the Director of the Office of Water and Watersheds and the P uyallup Tribe in writing of:

1. Any new introduction of pollutants into the POTW from an indirect discharger which would be subject to Sections 301 or 306 of the Act if it were directly discharging those pollutants; and

2. Any substantial change in the volume or character of pollutants being introduced into the POTW by a source introducing pollutants into the POTW at the time of issuance of the permit.

3. For the purposes of this section, adequate notice must include information on:
a) The qu ality and quantity of effluent to be introduced into the POTW, and
b) Any anticipated impact of the change on the quantity or quality of effluent to be discharged from the POTW.

4. The permittee must notify the Director of the Office of Water and Watersheds at the following address:

US EPA Region 10 Attn: NPDES Permits Unit Manager 1200 Sixth Avenue, Suite 900 OWW-130 Seattle, WA 98101 -3140



### IV. Compliance Responsibilities

A. Duty to Comply The permittee must comply with all conditions of this permit. Any permit

nonco mpliance constitutes a violation of the Act and is grounds for enforcement action, for permit termination, revocation and reissuance, or modification, or for denial of a permit renewal application.

B. Penalties for Violations of Permit Conditions
1. Civil and Administrative Penalties. Pursuant to 40 CFR Part 19 and the Act, any person who violates section 301, 302, 306, 307, 308, 318 or 405 of the Act, or any permit condition or limitation implementing any such sections in a permit issued under section 402, or any requirement imposed in a pretreatment program approved under sections 402(a)(3) or 402(b)(8) of the Act, is subject to a civilPermit No.: WA0037168 Page 31 of 41
penalty not to exceed the maximum amounts authorized by Section 309(d) of the Act and the Federal Civil Penalties Inflation Adjustment Act (28 U.S.C. § 2461 note) as amended by the Debt Collection Improvement Act (31 U.S.C. § 3701 note) (currently $37,500 per day for each violation).

2. Administrative Penalties. Any person may be assessed an administrative penalty by the Administrator for violating section 301, 302, 306, 307, 308, 318 or 405 of this Act, or any permit condition or limitation implementing any of such sections in a permit issued under section 402 of this Act. Pursuant to 40 CFR 19 and the Act, administrative penalties for Class I violations are not to exceed the maximum

a mounts authorized by Section 309(g)(2)(A) of the Act and the Federal Civil Penalties Inflation Adjustment Act (28 U.S.C. § 2461 note) as amended by the Debt Collection Improvement Act (31 U.S.C. § 3701 note) (currently $16,000 per viol ation, with the maximum amount of any Class I penalty assessed not to exceed $37,500). Pursuant to 40 CFR 19 and the Act, penalties for Class II violations are not to exceed the maximum amounts authorized by Section 309(g)(2)(B) of the Act and the Federal Civil Penalties Inflation Adjustment Act (28 U.S.C. § 2461 note) as amended by the Debt Collection Improvement Act (31 U. S.C. § 3701 note) (currently $16,000 per day for each day during which the violation continues, with the maximum amount of any Class II penalty not to exceed $177,500).

3. Criminal Penalties:
a) Negligent Violations. The Act provides that any person who negligently violates sections 301, 302, 306, 307, 308, 318, or 405 of the Act, or any condition or limitation implementing any of such sections in a permit issued under section 402 of the Act, or any requirement imposed in a pretreatment program approved under section 402(a)(3) or 402(b)(8) of the Act, is subject to criminal penalties of $2,500 to $25,000 per day of violation, or imprisonment of not more than 1 year, or both. In the case of a second or subsequent conviction for a negligent violation, a person shall be subject to criminal penalties of not more than $50,000 per day of violation, or by imprisonment of not more than 2 years, or both.
b) Know ing Violations. Any person who knowingly violates such sections, or such conditions or limitations is subject to criminal penalties of $5,000 to $50,000 per day of violation, or imprisonment for not more than 3 years, or both. In the case of a second or subsequent conviction for a knowing violation, a person shall be subject to criminal penalties of not more than $100,000 per day of violation, or imprisonment of not more than 6 years, or both.
c) Knowing Endangerment. Any person who knowingly violates section 301, 302, 303, 306, 307, 308, 318 or 405 of the Act, or any permit condition or limitation implementing any of such sections in a permit issued under section 402 of the Act, and who knows at that time that he thereby places another person in imminent danger of death or serious bodily injury, shall, upon conviction, be subject to a fine of not more than $250,000 or imprisonment ofPermit No.: WA0037168 Page 32 of 41
not more than 15 years, or both. In the case of a second or subsequent conviction for a knowing endangerment violation, a person shall be subject to

a fine of not more than $500,000 or by imprisonment of not more than 30 years, or both. An organization, as defined in section 309(c)(3)(B)(iii) of the Act, shall, upon conviction of violating the imminent danger provision, be subject to a fine of not more than $1,000,000 and can be fined up to $2,000,000 for second or subsequent convictions.
d) False Statements. The Act provides that any person who falsifies, tampers with, or knowingly renders inaccurate any monitoring device or method required to be maintained under this permit shall, upon conviction, be punished by a fine of not more than $10,000, or by imprisonment for not more than 2 years, or both. If a conviction of a person is for a violation committed after a first conviction of such person under this paragraph, punishment is a fine of not more than $20,000 per day of violation, or by imprisonment of not more than 4 years, or both. The Act further provides that any person who knowingly makes any false statement, representation, or certification in any record or other document submitted or required to be maintained under thispermit, including monitoring reports or reports of compliance or noncompliance shall, upon conviction, be punished by a fine of not more than $10,000 per violation, or by imprisonment for not more than 6 months per violation, or by both.

C. Need To Halt or Reduce Activity not a Defense It shall not be a defense for the permittee in an enforcement action that it would have b een necessary to halt or reduce the permitted activity in order to maintain compliance with this permit.

D. Duty to Mitigate The permittee must take all reasonable steps to minimize or prevent any discharge in violation of this permit that has a reasonable likelihood of adversely affecting human health or the environment.

E. Proper Operation and Maintenance The permittee must at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the permittee to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures. This provision requires the operation of back -up or auxiliary facilities or similar systems which are installed by the permittee only when the operation is necessary to achieve compliance with the conditions of the permit.Permit No.: WA0037168 Page 33 of 41

F. Bypass of Treatment Facilities
1. Bypass not exceeding limitations. The permittee may allow any bypass to occur that does not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to assure efficient operation. These bypasses are not subject to the provisions of paragraphs 2 and 3 of this Part.

2. Notice.
a) Anticipated bypass. If the permittee knows in advance of the need for a bypass, it must submit prior written notice, if possible at least 10 days before the date of the bypass.
b) Unanticipated bypass. The permittee must submit notice of an unanticipated bypass as required under Part II I.G (“Twenty-four Hour Notice of Noncompliance Reporting”).

3. Prohibition of bypass.
a) Bypass is prohibited, and the Director of the Office of Compliance and Enforcement may take enforcement action against the permittee for a bypass, unless:
(i) The bypass was unavoidable to prevent loss of life, personal injury, or severe property damage;
(ii) There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass that occurred during normal periods of equipment downtime or preventive maintenance; and
(iii) The permittee submitted notices as required under paragraph 2 of this Part.
b) The Director of the Office of Compliance and Enforcement may approve an anticipated bypass, after considering its adverse effects, if the Director determines that it will meet the three conditions listed above in paragraph 3.a. of this Part.

G. Upset Conditions
1. Effect of an upset. An upset constitutes an affirmative defense to an action brought for noncompliance with such technology-based permit effluent li mitations if the permittee meets the requirements of paragraph 2 of this Part. No determination made during administrative review of claims that noncompliance was caused by upset, and before an action for noncompliance, is final administrative action subject to judicial review.Permit No.: WA0037168 Page 34 of 41

2. Conditions necessary for a demonstration of upset. To establish the affirmative defense of upset, the permittee must demonstrate, through properly signed, contemporaneous operating logs, or other relevant evidence that:
a) An upse t occurred and that the permittee can identify the cause(s) of the upset;
b) The permitted facility was at the time being properly operated;
c) The permittee submitted notice of the upset as required under Part III.G, “Twenty-four Hour Notice of Noncompliance Reporting;” and
d) The permittee complied with any remedial measures required under Part IV.D,

“ Duty to Mitigate.”

3. Burden of proof. In any enforcement proceeding, the permittee seeking to establish the occurrence of an upset has the burden of proof.

H. Toxic Pollutants The permittee must comply with effluent standards or prohibitions established under Section 307(a) of the Act for toxic pollutants within the time provided in the regulations that establish those standards or prohibitions, even if the permit has not yet been modified to incorporate the requirement.

I. Planned Changes The permittee must give written notice to the Director of the Office of Water and Wa ter sheds as specified in Part III.J.4 . and the Puyallup Tribe as soon as possible of

a ny planned physical alterations or additions to the permitted facility whenever:

1. The alteration or addition to a permitted facility may meet one of the criteria for determining whether a facility is a new source as determined in 40 CFR 122.29(b); or

2. The alteration or addition could significantly change the nature or increase the quantity of pollutants discharged. This notification applies to pollutants that are not subject to effluent limitations in this permit.

3. The alteration or addition results in a significant change in the permittee’s sludge use or disposal practices, and such alteration, addition, or change may justify the application of permit conditions that are different from or absent in the existing permit, including notification of additional use or disposal sites not reported during the permit application process or not reported pursuant to an approved land application site.

J. Anticipated Noncompliance The permittee must give written advance notice to the Director of the Office of C ompliance and Enforcement and the Puyallup Tribe of any planned changes in the

pe rmitted facility or activity that may result in noncompliance with this permit.Permit No.: WA0037168 Page 35 of 41

K. Reopener This permit may be reopened to include any applicable standard for sewage sludge use or disposal promulgated under section 405(d) of the Act. The Director may modify or revoke and reissue the permit if the standard for sewage sludge use or disposal is more stringent than any requirements for sludge use or disposal in the permit, or controls a pollutant or practice not limited in the permit.



### V. General Provisions

A. Permit Actions This permit may be modified, revoked and reissued, or terminated for cause as specified in 40 CFR 122.62, 122.64, or 124.5. The filing of a request by the permittee for a permit modification, revocation and reissuance, termination, or a notification of planned changes or anticipated noncompliance does not stay any permit condition.

B. Duty to Reapply If the permittee intends to continue an activity regulated by this permit after the expiration date of this permit, the permittee must apply for and obtain a new permit. In accordance with 40 CFR 122.21(d), and unless permission for the application to be submitted at a later date has been granted by the Regional Administrator, the permittee must submit a new application at least 180 days before the expiration date of this permit.

C. Duty to Provide Information The permittee must furnish to EPA

, within the time specified in the request, any information that EPA may request to determine whether cause exists for modifying, revoking and reissuing, or terminating this permit, or to determine compliance with this permit. The permittee must also furnish to EPA, the Puyallup Tribe, or the Department of Ecology, upon request, copies of records required to be kept by this permit.

D. Other Information When the permittee becomes aware that it failed to submit any relevant facts in a permit application, or that it submitted incorrect information in a permit application or any report to EPA

, it must promptly submit the omitted facts or corrected infor mation in writing.

E. Signatory Requirements All applications, reports or information submitted to EPA must be signed and certified as follows.

1. All permit applications must be signed as follows:
a) For a corporation: by a responsible corporate officer.Permit No.: WA0037168 Page 36 of 41
b) For a partnership or sole proprietorship: by a general partner or the proprietor, respectively.
c) For a municipality, state, federal, Indian tribe, or other public agency: by either a principal executive officer or ranking elected official.

2. All reports required by the permit and other information requested by EPA must be signed by a person described above or by a duly authorized representative of that person. A person is a duly authorized representative only if:
a) The authorization is made in writing by a person described above;
b) The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity, such as the position of plant manager, operator of a well or a well field,

supe rintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company; and
c) The written authorization is submitted to the Director of the Office of Compliance and Enforcement.

3. Changes to authorization. If an authorization under Part V.E.2 is no longer accurate because a different individual or position has responsibility for the overall operation of the facility, a new authorization satisfying the requirements of Part V.E.2. must be submitted to the Director of the Office of Compliance and Enforcement prior to or together with any reports, information, or applications to be signed by an authorized representative.

4. Certification. Any person signing a document under this Part must make the following certification:
“I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.”

F. Availability of Reports In accordance with 40 CFR 2, information submitted to EPA pursuant to this permit may be claimed as confidential by the permittee. In accordance with the Act, permit applications, permits and effluent data are not considered confidential. Any confidentiality claim must be asserted at the time of submission by stamping the words “confidential business information” on each page containing such information. If no claim is made at the time of submission, EPA may make the information available to the public without further notice to the permittee. If a claim is asserted,Permit No.: WA0037168 Page 37 of 41
the information will be treated in accordance with the procedures in 40 CFR 2, Subpart B (Public Information) and 41 Fed. Reg. 36902 through 36924 (September 1, 1976), as amended.

G. Inspection and Entry The permittee must allow the Director of the Office of Compliance and Enforcement, EPA Region 10; the Puyallup Tribe; or an authorized representative (including an

a uthorized contractor acting as a representative of the Administrator), upon the presentation of credentials and other documents as may be required by law, to:

1. Enter upon the permittee's premises where a regulated facility or activity is located or conducted, or where records must be kept under the conditions of this permit;

2. Have access to and copy, at reasonable times, any records that must be kept under the conditions of this permit;

3. Inspect at reasonable times any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this permit; and

4. Sample or monitor at reasonable times, for the purpose of assuring permit compliance or as otherwise authorized by the Act, any substances or parameters at any location.

H. Property Rights The issuance of this permit does not convey any property rights of any sort, or any exclusive privileges, nor does it authorize any injury to persons or property or invasion of other private rights, nor any infringement of federal, tribal, state or local laws or regulations.

I. Transfers This permit is not transferable to any person except after written notice to the Director of the Office of Water and Watersheds as specified in Part III.J.4 . The Director may require modification or revocation and reissuance of the permit to change the name of the permittee and incorporate such other requirements as may be necessary under the Act. (See 40 CFR 122.61; in some cases, modification or revocation and reissuance is mandatory).

J. State Laws Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the permittee from any responsibilities, liabilities, or penalties established pursuant to any applicable state law or regulation under authority preserved by Section 510 of the Act.Permit No.: WA0037168 Page 38 of 41



### VI. Definitions

1. “Act” means the Clean Water Act.

2. “Acute Toxic Unit” (“TUa”) is a measure of acute toxicity. TUa is the reciprocal of the effluent concentration that causes 50 percent of the organisms to die by the end on the acute exposure period (i.e., 100/”LC50”).

3. “Administrator” means the Administrator of the EPA, or an authorized representative.

4. “Average monthly discharge limitation” means the highest allowable average of “daily discharges” over a calendar month, calculated as the sum of all “daily discharges” measured during a calendar month divided by the number of “daily discharges” measured during that month.

5. “Average weekly discharge limitation” means the highest allowable average of “daily discharges” over a calendar week, calculated as the sum of all “daily discharges” measured during a calendar week divided by the number of “daily discha rges” measured during that week.

6. “Best Management Practices” (BMPs) means schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to prevent or reduce the pollution of waters of the United States. BMPs also include

tre atment requirements, operating procedures, and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage areas.

7. “Bypass” means the intentional diversion of waste streams from any portion of a treatment facility.

8. “Chronic toxic unit” (“TUc”) is a measure of chronic toxicity. TUc is the reciprocal of the effluent concentration that causes no observable effect on the test organisms by the end of the chronic exposure period (i.e., 100/“NOEC”).

9. “Composite” - see “24-hour composite”.

10. “Daily discharge” means the discharge of a pollutant measured during a calendar day or any 24-hour period that reasonably represents the calendar day for purposes of sampling. For pollutants with limitations expressed in units of mass, the “daily discharge” is calculated as the total mass of the pollutant discharged over the day. For pollutants with limitations expressed in other units of measurement, the “daily discharge” is calculated as the average measurement of the pollutant over the day.

11. “1

- day maximum temperature” is the highest water temperature reached on any given day. This measure can be obtained using calibrated maximum/minimum thermometers or continuous monitoring probes havin g sampling intervals of one hour or less.

12. “Director of the Office of Compliance and Enforcement” means the Director of the Office of Compliance and Enforcement, EPA Region 10, or an authorized representative.Permit No.: WA0037168 Page 39 of 41

13. “Director of the Office of Water and Watersheds” means the Director of the Office of Water and Watersheds, EPA Region 10, or an authorized representative.

14. “DMR” means discharge monitoring report.

15. “EPA” means the United States Environmental Protection Agency.

16. “Geometric Mean” means the n th root of a product of n factors, or the antilogarithm of the arithmetic mean of the logarithms of the individual sample values.

17. “Grab” sample is an individual sample collected over a period of time not exceeding 15 minutes.

18. “Inhibition concentration”, IC, is a point estimate of the toxicant concentration that causes a given percent reduction (p) in a non-quantal biological measurement (e.g., reproduction or growth) calculated from a continuous model (e.g., Interpolation Method).

19. “Interference” is defined in 40 CFR 403.3.

20. “Interim Minimum Level (IML)” is used when a method-specific “Minimum Level (ML)” has not been published by EPA. The IML is equal to 3.18 times the method -specified “Method Detection Limit (MDL)”.

21. “LC50” means the concentration of toxicant (e.g., effluent) which is lethal to 50 percent of the test organisms exposed in the time period prescribed by the test.

22. “Maximum daily discharge limitation” means the highest allowable “daily discharge.”

23. “Method Detection Limit (MDL)” means the minimum concentration of a substance (analyte) that can be measured and reported with 99 percent confidence that the analyte concentration is greater than zero and is determined from analysis of a sample in a given matrix containing the analyte.

24. “Minimum Level (ML)” means the concentration at which the entire analytical system must give a recognizable signal and an acceptable calibration point. The ML is the concentration in a sample that is equivalent to the concentration of the lowest calibration standard analyzed by a specific analytical procedure, assuming that all the method-specified sample weights, volumes and processing steps have been followed.

25. “NOEC” means no observed effect concentration. The NOEC is the highest concentration of toxicant (e.g., effluent) to which organisms are exposed in a chronic toxicity test [full life-cycle or partial life-cycle (short term) test], that causes no observable adverse effects on the test organisms (i.e., the highest concentration of effluent in which the values for the observed responses are not statistically significantly different from the controls).

26. “NPDES” means National Pollutant Discharge Elimination System, the national program for issuing, modifying, revoking and reissuing, terminating, monitoring and enforcing permits . . . under sections 307, 402, 318, and 405 of the CWA.Permit No.: WA0037168 Page 40 of 41

27. “Pass Through” means a Discharge which exits the POTW into waters of the United St ates in quantities or concentrations which, alone or in conjunction with a discharge or discharges from other sources, is a cause of a violation of any requirement of the POTW's NPDES permit (including an increase in the magnitude or duration of a violation).

28. “QA/QC” means quality assurance/quality control.

29. “Regional Administrator” means the Regional Administrator of Region 10 of the EPA, or the authorized representative of the Regional Administrator.

30. “7

- DADMax” or “7

- day average of the daily maximum temperatures” is the arithmetic average of seven consecutive measures of daily maximum temperatures. The 7

- DADMax for any individu al day is calculated by averaging that day’s daily maximum temperature with the daily maximum temperatures of the three days prior and the three days after that date.

31. “Severe property damage” means substantial physical damage to property, damage to the treatment facilities which causes them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production.

32. “Significant Industrial User” means all industrial users subject to Categorical Pretreatment Standards under 40 CFR 403.6 and 40 CFR chapter I, subchapter N; and any other industrial user that: discharges an average of 25,000 gallons per day or more of process wastewater to the POTW (excluding sanitary, noncontact cooling and boiler blowdown wastewater); contributes a process wastestream which makes up 5 percent or more of the average dry weather hydraulic or organic capacity of the POTW treatment plant; or is designated as such by the Control Authority as defined in 40 CFR 403.12(a) on the basis that the industrial user has a reasonable potential for adversely affecting the POTW's operation or for violating any pretreatment standard or requirement (in accordance with 40 CFR 403.8(f)(6)). Upon a finding that an industrial user meeting above the criteria has no reasonable potential for adversely affecting the POTW's operation or for violating any pretreatment standard or requirement, the Control Authority (as defined in 40 CFR 403.12(a)) may at any time, on its own initiative or in response to a petition received from an industrial user or POTW, and in accordance with 40 CFR 403.8(f)(6), determine that such industrial user is not a significant industrial user.

33. “Upset” means an exceptional incident in which there is unintentional and temporary noncompliance with technology-based permit effluent limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation.

34. “24 -hour composite” sample means a combination of at least 8 discrete sample aliquots of at least 100 milliliters, collected over periodic intervals from the samePermit No.: WA0037168 Page 41 of 41
location, during the operating hours of a facility over a 24 hour period. The composite must be flow proportional. The sample aliquots must be collected and stored in accordance with procedures prescribed in the most recent edition of Standard Methods for the Examination of Water and Wastewater.