Page 1 of 44

Permit No. WA0023451

Issuance Date: August 27, 2013

Effective Date: October 1, 2013

Expiration Date: September 30, 2018

National Pollutant Discharge Elimination System

Waste Discharge Permit No. WA0023451

State of Washington

DEPARTMENT OF ECOLOGY

Northwest Regional Office

3190 160th Avenue SE

Bellevue, WA 98008-5452

In compliance with the provisions of

The State of Washington Water Pollution Control Law

Chapter 90.48 Revised Code of Washington

and

The Federal Water Pollution Control Act

(The Clean Water Act)

Title 33 United States Code, Section 1342 et seq.

LAKEHAVEN UTILITY DISTRICT – REDONDO WWTP

31627 1st Avenue South

Federal Way, WA 98023

is authorized to discharge in accordance with the Special and General Conditions that follow.

Plant Location:

Redondo Wastewater Treatment Plant

515 South 288th Street

Des Moines, WA 98198

King County

Receiving Water:

Puget Sound – Poverty Bay

Treatment Type:

Trickling Filter (Secondary Treatment)

Kevin C. Fitzpatrick

Water Quality Section Manager

Northwest Regional Office

Washington State Department of Ecology
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Permit No. WA0023451

Table of Contents

Summary of Permit Report Submittals ......................................................................................... 4

Special Conditions.......................................................................................................................... 5

S1. Discharge limits................................................................................................................... 5

S1.A. Effluent limits.....................................................................................................................5

S1.B. Mixing zone authorization ..................................................................................................6

S2. Monitoring requirements ................................................................................................... 7

S2.A. Monitoring schedule ...........................................................................................................7

S2.B. Sampling and analytical procedures ...................................................................................9

S2.C. Flow measurement, field measurement, and continuous monitoring devices ....................9

S2.D. Laboratory accreditation ...................................................................................................10

S2.E. Request for reduction in monitoring.................................................................................10

S3. Reporting and recording requirements........................................................................... 10

S3.A. Reporting ..........................................................................................................................10

S3.B. Records retention ..............................................................................................................12

S3.C. Recording of results..........................................................................................................12

S3.D. Additional monitoring by the Permittee ...........................................................................13

S3.E. Reporting permit violations ..............................................................................................13

S3.F. Other reporting..................................................................................................................14

S3.G. Maintaining a copy of this permit.....................................................................................15

S4. Facility loading .................................................................................................................. 15

S4.A. Design criteria...................................................................................................................15

S4.B. Plans for maintaining adequate capacity...........................................................................15

S4.C. Duty to mitigate ................................................................................................................16

S4.D. Notification of new or altered sources..............................................................................16

S4.E. Infiltration and inflow evaluation .....................................................................................16

S5. Operation and maintenance ............................................................................................. 16

S5.A. Certified operator..............................................................................................................17

S5.B. Operation and maintenance program................................................................................17

S5.C. Short-term reduction .........................................................................................................17

S5.D. Electrical power failure.....................................................................................................17

S5.E. Prevent connection of inflow............................................................................................18

S5.F. Bypass procedures ............................................................................................................18

S5.G. Operations and maintenance (O&M) manual ...................................................................19

S6. Pretreatment...................................................................................................................... 20

S6.A. General requirements........................................................................................................20

S6.B. Duty to enforce discharge prohibitions.............................................................................21

S6.C. Wastewater discharge permit required..............................................................................22

S6.D. Identification and reporting of existing, new, and proposed industrial users ...................22

S7. Solid wastes........................................................................................................................ 23

S7.A. Solid waste handling.........................................................................................................23

S7.B. Leachate............................................................................................................................23
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Permit No. WA0023451

S8. Application for permit renewal or modification for facility changes........................... 23

S9. Sediment monitoring......................................................................................................... 23

S9.A. Sediment sampling and analysis plan ...............................................................................23

S9.B. Sediment data report .........................................................................................................23

S10. Acute toxicity...................................................................................................................... 24

S10.A. Effluent characterization...................................................................................................24

S10.B. Effluent limit for acute toxicity.........................................................................................24

S10.C. Compliance with the effluent limit for acute toxicity .......................................................25

S10.D. Compliance testing for acute toxicity ...............................................................................25

S10.E. Response to noncompliance with the effluent limit for acute toxicity..............................25

S10.F. Testing when there is no permit limit for acute toxicity (if the characterization testing in 

S10.A shows no acute toxicity) ........................................................................................27

S10.G. Sampling and reporting requirements...............................................................................27

S11. Chronic toxicity.................................................................................................................. 28

S11.A. Testing when there is no permit limit for chronic toxicity ...............................................28

S11.B. Sampling and reporting requirements...............................................................................28

General Conditions...................................................................................................................... 30

G1. Signatory requirements.................................................................................................. 30

G2. Right of inspection and entry......................................................................................... 31

G3. Permit actions.................................................................................................................. 31

G4. Reporting planned changes............................................................................................ 32

G5. Plan review required....................................................................................................... 33

G6. Compliance with other laws and statutes ..................................................................... 33

G7. Transfer of this permit ................................................................................................... 33

G8. Reduced production for compliance ............................................................................. 34

G9. Removed substances ....................................................................................................... 34

G10. Duty to provide information .......................................................................................... 34

G11. Other requirements of 40 CFR...................................................................................... 34

G12. Additional monitoring .................................................................................................... 34

G13. Payment of fees................................................................................................................ 34

G14. Penalties for violating permit conditions...................................................................... 34

G15. Upset................................................................................................................................. 35

G16. Property rights................................................................................................................ 35

G17. Duty to comply ................................................................................................................ 35

G18. Toxic pollutants............................................................................................................... 35

G19. Penalties for tampering .................................................................................................. 36

G20. Compliance schedules..................................................................................................... 36

G21. Service agreement review............................................................................................... 36

Appendix A................................................................................................................................... 37
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Permit No. WA0023451

Summary of Permit Report Submittals

Refer to the Special and General Conditions of this permit for additional submittal requirements.

Permit 

Section

Submittal Frequency First Submittal Date

S3.A Discharge Monitoring Report Monthly November 15, 2013

S3.A Final Effluent Monitoring Report Submittal 1/year in January January 15, 2014

S3.E Reporting Permit Violations As necessary

S3.E.a Reporting Permit Violations – Immediate 

Reporting

As necessary

S3.E.b Reporting Permit Violations – 24-Hour 

Reporting

As necessary

S3.E.c Reporting Permit Violations – Report within 

Five Days

As necessary

S3.E.e Reporting Permit Violations – All Other 

Reporting

Monthly as 

necessary

S3.F Other Reporting As necessary

S4.B Plans for Maintaining Adequate Capacity As necessary

S4.D Notification of New or Altered Sources As necessary

S4.E Infiltration and Inflow Evaluation 1/permit cycle April 30, 2016

S5.F Bypass Notification As necessary

S5.G Operations and Maintenance Manual Update 1/permit cycle June 30, 2015

S5.G Operations and Maintenance Manual Review 

Confirmation Letter

1/permit cycle June 30, 2017

S8 Application for Permit Renewal 1/permit cycle September 30, 2017

S9.A Sediment Baseline Sampling and Analysis 

Plan

1/permit cycle March 31, 2015

S9.B Sediment Chemistry Analyses 1/permit cycle March 31, 2017

S10.A Acute Toxicity Characterization Report 4/permit cycle January 30, 2014

April 30, 2014

July 30, 2014

October 30, 2014

S10.D Acute Toxicity Compliance Monitoring 

Reports

IF Acute 

Toxicity Limit is 

Triggered

January 30, 2015 and 

each subsequent 4/30, 

7/30, 10/30, and 1/30

S10.E Acute Toxicity: “Causes and Preventative 

Measures for Transient Events”

As necessary

S10.E Acute Toxicity TI/TRE Plan As necessary

S10.F Acute Toxicity Effluent Test Results 2/permit cycle

IF NO LIMIT

October 30, 2016

April 30, 2017

S11.A Chronic Toxicity: Effluent Testing Results 2/permit cycle January 30, 2017

July 30, 2017

G1 Notice of Change in Authorization As necessary

G4 Reporting Planned Changes As necessary

G5 Engineering Report for Construction or 

Modification Activities

As necessary

G7 Notice of Permit Transfer As necessary

G10 Duty to Provide Information As necessary

G13 Payment of Fees As assessed

G20 Compliance Schedules As necessary

G21 Contract Submittal As necessary
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Permit No. WA0023451

Special Conditions

S1. Discharge limits 

S1.A. Effluent limits

All discharges and activities authorized by this permit must comply with the terms 

and conditions of this permit. The discharge of any of the following pollutants 

more frequently than, or at a level in excess of, that identified and authorized by 

this permit violates the terms and conditions of this permit.

Beginning on the effective date of this permit, the Permittee may discharge 

treated municipal wastewater to the Puget Sound – Poverty Bay at the permitted 

location subject to compliance with the following limits: 

Effluent Limits: Outfall # 001

Latitude: 47.34941 Longitude: -122.338038

Parameter Average Monthly a Average Weekly b

Carbonaceous Biochemical 

Oxygen Demand (5-day) 

(CBOD5)

25 milligrams/liter (mg/L)

1,168 pounds/day (lbs/day)

85% removal of influent CBOD5

40 mg/L

1,868 lbs/day

Total Suspended Solids (TSS) 30 mg/L

1,401 lbs/day

85% removal of influent TSS

45 mg/L

2,102 lbs/day

Parameter Minimum Maximum

pH 6.0 standard units 9.0 standard units

Parameter Monthly Geometric mean Weekly Geometric mean

Fecal Coliform Bacteria c

200/100 milliliter (mL) 400/100 mL

Parameter Average Monthly Maximum Daily d

Total Residual Chlorine e

120 micrograms/liter (μg/L) 312 μg/L

a Average monthly effluent limit means the highest allowable average of daily discharges over a calendar 

month. To calculate the discharge value to compare to the limit, you add the value of each daily 

discharge measured during a calendar month and divide this sum by the total number of daily 

discharges measured. See footnote c for fecal coliform calculations.

b 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 discharges” measured during that week. See footnote c for fecal 

coliform calculations.

c Ecology provides directions to calculate the monthly and the weekly geometric mean in publication No. 

04-10-020, Information Manual for Treatment Plant Operators available at: 

http://www.ecy.wa.gov/pubs/0410020.pdf

d Maximum daily effluent limit is the highest allowable daily discharge. The daily discharge is the 

average discharge of a pollutant measured during a calendar day. For pollutants with limits expressed 

in units of mass, calculate the daily discharge as the total mass of the pollutant discharged over the 

day. This does not apply to pH or temperature.

e Chlorine limits apply only during emergency periods when UV disinfection is not available and the 

Permittee uses chlorine for disinfection. During normal operations with UV disinfection, chlorine limits 

do not apply. When not using chlorine during the monitoring period, enter “no discharge” for chlorine on 

the DMR for the period. 
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Permit No. WA0023451

24 inch HDPE Outfall Pipe w/ open end port

Plan View

Chronic Mixing 

Zone Boundary

Side View

-400 ft MLLW

120 ft

0 ft MLLW

Acute Mixing 

Zone Boundary

Figure 1. Outfall Mixing Zones

1200 ft

S1.B. Mixing zone authorization

Mixing zone for Outfall No.001

The following paragraphs define the maximum boundaries of the mixing zones:

Chronic mixing zone

The mixing zone is a circle with radius of 600 feet (182.9 meters) measured from 

the center of each discharge port. The mixing zone extends from the discharge 

port to the top of the water surface. The concentration of pollutants at the edge of 

the chronic zone must meet chronic aquatic life criteria and human health criteria.

Acute mixing zone

The acute mixing zone is a circle with radius of 60 feet (18.3 meters) measured 

from the center of the discharge port. The mixing zone extends from the 

discharge port to the top of the water surface. The concentration of pollutants at 

the edge of the acute zone must meet acute aquatic life criteria.

Available Dilution (dilution factor)

Acute Aquatic Life Criteria 79

Chronic Aquatic Life Criteria 182

Human Health Criteria - Carcinogen 182

Human Health Criteria - Non-carcinogen 182

The horizontal dimensions and boundaries of the mixing zone are as depicted in 

Figure 1. 
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Permit No. WA0023451

S2. Monitoring requirements

S2.A. Monitoring schedule

The Permittee must monitor in accordance with the following schedule and the 

requirements specified in Appendix A. 

Parameter Units & Speciation Minimum Sampling 

Frequency

Sample Type

(1) Wastewater influent

Wastewater Influent means the raw sewage flow from the collection system into the treatment facility. 

Sample the wastewater entering the headworks of the treatment plant excluding any side-stream returns 

from inside the plant.

BOD5 mg/L 1/week 24-hour composite a

BOD5 lbs/day 1/week Calculated b

CBOD5 mg/L 3/week 24-hour composite

CBOD5 lbs/day 3/week Calculated

TSS mg/L 3/week 24-hour composite

TSS lbs/day 3/week Calculated

(2) Final wastewater effluent

Final Wastewater Effluent means wastewater exiting the last treatment process or operation. Typically, 

this is after or at the exit from the chlorine contact chamber or other disinfection process. The Permittee 

may take effluent samples for the BOD5 analysis before or after the disinfection process. If taken after, 

the Permittee must dechlorinate and reseed the sample.

Flow mgd Continuous c Metered/recorded

CBOD5 mg/L 3/week 24-hour composite

CBOD5 lbs/day 3/week Calculated

CBOD5 % removal d1/month Calculated

TSS mg/L 3/week 24-hour composite

TSS lbs/day 3/week Calculated

TSS % removal 1/month Calculated

Chlorine (Total 

Residual) e

μg/L 1/day Grab

Fecal Coliform f

# /100 mL 3/week g Grab h

pH i Standard Units Daily Grab or Measured

Temperature j Degrees centigrade (C) Daily Grab or Measured

(3) Whole effluent toxicity testing – final wastewater effluent

Acute Toxicity Testing –

Characterization

See S10.A Quarterly for 1 year 

beginning 4th quarter 

2013

24-hr composite

Acute Toxicity Testing –

Compliance

IF ACUTE WET LIMIT 

IS TRIGGERED

See S10.D Quarterly beginning 4th

quarter 2014

24-hr composite

Acute Toxicity Testing –

Reapplication

IF NO ACUTE WET 

LIMIT

See S10.F 3

rd Quarter 2016 &

1

st Quarter 2017

24-hr composite

Chronic Toxicity Testing 4

th Quarter 2016 &

2

nd Quarter 2017 

24-hour composite

(4) Effluent characterization – final wastewater effluent

Total Ammonia mg/L as N Monthly k24-hour composite

Total Phosphorus mg/L as P Monthly 24-hour composite

Soluble Reactive mg/L as P Monthly 24-hour composite
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Permit No. WA0023451

Parameter Units & Speciation Minimum Sampling 

Frequency

Sample Type

Phosphorus

Nitrate plus Nitrite 

Nitrogen

mg/L as N Monthly Grab

Total Kjeldahl Nitrogen 

(TKN)

mg/L as N Monthly 24-hour composite

(5) Permit renewal application requirements – final wastewater effluent

The Permittee must record and report the wastewater treatment plant flow discharged on the day it 

collects the sample for priority pollutant testing with the discharge monitoring report.

Dissolved Oxygen mg/L Once per year Grab

Oil and Grease mg/L Once per year Grab

Total Dissolved Solids mg/L Once per year 24-Hour composite

Total Hardness mg/L Once per year 24-Hour composite

Priority Pollutants (PP) 

see Appendix A –

Metals, Cyanide & Total 

Phenols

μg/L; nanograms (ng/L) 

for mercury

Once per year 24-Hour composite

Grab for mercury

PP – Volatile

Compounds

μg/L Once per year Grab

PP – Acid Compounds μg/L Once per year 24-Hour composite

PP – Base/neutral 

Compounds 

μg/L Once per year 24-Hour composite

(6) Sediment study

As specified in Special Condition S 9.

a

24-hour composite means a series of individual samples collected over a 24-hour period into a single 

container, and analyzed as one sample.

b Calculated means figured concurrently with the respective sample, using the following formula: 

Concentration (in mg/L) X Flow (in MGD) X Conversion Factor (8.34) = lbs/day

c Continuous means uninterrupted except for brief lengths of time for calibration, power failure, or 

unanticipated equipment repair or maintenance.

d % removal = Influent concentration (mg/L) – Effluent concentration (mg/L) x 100

Influent concentration (mg/L)

Calculate the percent (%) removal of CBOD5 and TSS using the above equation. 

e The Permittee must monitor total chlorine residual concentrations only when using chlorine for 

disinfection purposes.

f Report a numerical value for fecal coliforms following the procedures in Ecology’s Information Manual 

for Wastewater Treatment Plant Operators, Publication Number 04-10-020 available at: 

http://www.ecy.wa.gov/programs/wq/permits/guidance.html . Do not report a result as too numerous to 

count (TNTC).

g

3/week means three (3) times during each calendar week.

h Grab means an individual sample collected over a fifteen (15) minute, or less, period.

i The Permittee must report the instantaneous maximum and minimum pH daily. Do not average pH 

values. 

j Temperature grab sampling must occur when the effluent is at or near its daily maximum temperature, 

which usually occurs in the late afternoon. If measuring temperature continuously, the Permittee must 

determine and report a daily maximum from half-hour measurements in a 24-hour period. Continuous 

monitoring instruments must achieve an accuracy of 0.2 degrees C and the Permittee must verify 

accuracy annually.

k Monthly means once every calendar month.
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Permit No. WA0023451

S2.B. Sampling and analytical procedures

Samples and measurements taken to meet the requirements of this permit must 

represent the volume and nature of the monitored parameters. The Permittee must 

conduct representative sampling of any unusual discharge or discharge condition, 

including bypasses, upsets, and maintenance-related conditions that may affect 

effluent quality.

Sampling and analytical methods used to meet the monitoring requirements 

specified in this permit must conform to the latest revision of the Guidelines 

Establishing Test Procedures for the Analysis of Pollutants contained in 40 CFR 

Part 136 (or as applicable in 40 CFR subchapters N [Parts 400–471] or O [Parts 

501-503]) unless otherwise specified in this permit . Ecology may only specify

alternative methods for parameters without permit limits and for those parameters 

without an EPA approved test method in 40 CFR Part 136. 

S2.C. Flow measurement, field measurement, and continuous monitoring devices

The Permittee must:

1. Select and use appropriate flow measurement, field measurement, and 

continuous monitoring devices and methods consistent with accepted 

scientific practices.

2. Install, calibrate, and maintain these devices to ensure the accuracy of the 

measurements is consistent with the accepted industry standard and the 

manufacturer’s recommendation for that type of device.

3. Calibrate continuous monitoring instruments weekly unless it can demonstrate 

a longer period is sufficient based on monitoring records. The Permittee:

a. May calibrate apparatus for continuous monitoring of dissolved oxygen by 

air calibration.

b. Must calibrate continuous pH measurement instruments using a grab 

sample analyzed in the lab with a pH meter calibrated with standard 

buffers and analyzed within 15 minutes of sampling.

c. Must calibrate continuous chlorine measurement instruments using a grab 

sample analyzed in the laboratory within 15 minutes of sampling.

4. Calibrate micro-recording temperature devices, known as thermistors, using 

protocols from Ecology’s Quality Assurance Project Plan Development Tool 

(Standard Operating Procedures for Continuous Temperature Monitoring of 

Fresh Water Rivers and Streams Version 1.0 10/26/2011). This document is 

available online at: 

http://www.ecy.wa.gov/programs/eap/qa/docs/ECY_EAP_SOP_Cont_Temp_Mon_A

mbient_v1_0EAP080.pdf

Calibration as specified in this document is not required if the Permittee uses 

recording devices certified by the manufacturer.

5. Use field measurement devices as directed by the manufacturer and do not use 

reagents beyond their expiration dates.
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Permit No. WA0023451

6. Calibrate these devices at the frequency recommended by the manufacturer.

7. Calibrate flow-monitoring devices at a minimum frequency of at least one 

calibration per year.

8. Maintain calibration records for at least three years.

S2.D. Laboratory accreditation

The Permittee must ensure that all monitoring data required by Ecology for permit 

specified parameters is prepared by a laboratory registered or accredited under the 

provisions of chapter 173-50 WAC, Accreditation of Environmental Laboratories. 

Flow, temperature, settleable solids, conductivity, pH, and internal process control 

parameters are exempt from this requirement.

S2.E. Request for reduction in monitoring

The Permittee may request a reduction of the sampling frequency after twelve 

(12) months of monitoring. Ecology will review each request and at its discretion 

grant the request when it reissues the permit or by a permit modification.

The Permittee must:

1. Provide a written request.

2. Clearly state the parameters for which it is requesting reduced monitoring.

3. Clearly state the justification for the reduction. 

S3. Reporting and recording requirements

The Permittee must monitor and report in accordance with the following conditions. 

Falsification of information submitted to Ecology is a violation of the terms and 

conditions of this permit.

S3.A. Reporting

The first monitoring period begins on the effective date of the permit. The 

Permittee must:

1. Summarize, report, and submit monitoring data obtained during each 

monitoring period on the electronic Discharge Monitoring Report (DMR) 

form provided by Ecology within WQWebDMR. Include data for each of the 

parameters tabulated in Special Condition S2 and as required by the form. 

Report a value for each day sampling occurred (unless specifically exempted 

in the permit) and for the summary values (when applicable) included on the 

electronic form. 

To find out more information and to sign up for WQWebDMR go to: 

http://www.ecy.wa.gov/programs/wq/permits/paris/webdmr.html

If unable to submit electronically (for example, if you do not have an internet 

connection), the Permittee must contact Ecology to request a waiver and 

obtain instructions on how to obtain a paper copy DMR.
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Permit No. WA0023451

2. Enter the “no discharge” reporting code for an entire DMR, for a specific 

monitoring point, or for a specific parameter as appropriate, if the Permittee

did not discharge wastewater or a specific pollutant during a given monitoring 

period. 

3. Report single analytical values below detection as “less than the detection 

level (DL)” by entering < followed by the numeric value of the detection level 

(e.g. < 2.0) on the DMR. If the method used did not meet the minimum DL 

and quantitation level (QL) identified in the permit, report the actual QL and 

DL in the comments or in the location provided.

4. Report the test method used for analysis in the comments if the laboratory

used an alternative method not specified in the permit and as allowed in 

Appendix A. 

5. Calculate average values (unless otherwise specified in the permit) using:

a. The reported numeric value for all parameters measured between the 

agency-required detection value and the agency-required quantitation 

value. 

b. One-half the detection value (for values reported below detection) if the 

lab detected the parameter in another sample for the reporting period.

c. Zero (for values reported below detection) if the lab did not detect the 

parameter in another sample for the reporting period.

6. Report single-sample grouped parameters (for example priority pollutants, 

PAHs, pulp and paper chlorophenolics, TTOs) on the WQWebDMR form and 

include: sample date, concentration detected, detection limit (DL) (as 

necessary), and laboratory quantitation level (QL) (as necessary). The 

Permittee must also submit an electronic PDF copy of the laboratory report

using WQWebDMR. 

If the Permittee has obtained a waiver from electronic reporting or if 

submitting prior to the compliance date, the Permittee must submit a paper 

copy of the laboratory report providing the following information: date

sampled, sample location, date of analysis, parameter name, CAS number, 

analytical method/number, detection limit (DL), laboratory quantitation level 

(QL), reporting units, and concentration detected. 

The contract laboratory reports must also include information on the chain of 

custody, QA/QC results, and documentation of accreditation for the 

parameter.

7. Ensure that DMRs are electronically submitted no later than the dates 

specified below, unless otherwise specified in this permit. 

If the Permittee has obtained a waiver, it must ensure that paper forms are 

postmarked or received by Ecology no later than the dates specified below, 

unless otherwise specified in this permit.
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Permit No. WA0023451

8. Submit DMRs for parameters with the monitoring frequencies specified in S2 

(monthly, quarterly, annual, etc.) at the reporting schedule identified below. 

The Permittee must:

a. Submit monthly DMRs by the 15th day of the following month. The first 

submittal is November 15, 2013.

b. Submit the annual monitoring report under Special Condition S2A. (5) in 

January each year. The first submittal is January 15, 2014.

c. Submit permit renewal application monitoring data in WQWebDMR and 

electronic files (EXCEL files) to permit manager as required in Special 

Condition S2 by September 30, 2017. If the Permittee has obtained a 

waiver from Ecology, it must submit the permit renewal application 

monitoring data in a report by September 30, 2017.

9. Submit reports to Ecology online using Ecology’s electronic WQWebDMR 

submittal forms (electronic DMRs) as required above. Send paper reports to 

Ecology at:

Water Quality Permit Coordinator

Department of Ecology

Northwest Regional Office

3190 160th Avenue SE

Bellevue, WA 98008-5452

S3.B. Records retention

The Permittee must retain records of all monitoring information for a minimum of 

three (3) years. Such information must include all calibration and maintenance 

records and all original recordings for continuous monitoring instrumentation, 

copies of all reports required by this permit, and records of all data used to 

complete the application for this permit. The Permittee must extend this period of 

retention during the course of any unresolved litigation regarding the discharge of 

pollutants by the Permittee or when requested by Ecology. 

S3.C. Recording of results

For each measurement or sample taken, the Permittee must record the following 

information: 

1. The date, exact place, method, and time of sampling or measurement.

2. The individual who performed the sampling or measurement.

3. The dates the analyses were performed.

4. The individual who performed the analyses.

5. The analytical techniques or methods used.

6. The results of all analyses.
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Permit No. WA0023451

S3.D. Additional monitoring by the Permittee

If the Permittee monitors any pollutant more frequently than required by Special 

Condition S2 of this permit, then the Permittee must include the results of such 

monitoring in the calculation and reporting of the data submitted in the 

Permittee's DMR unless otherwise specified by Special Condition S2.

S3.E. Reporting permit violations

The Permittee must take the following actions when it violates or is unable to 

comply with any permit condition: 

1. Immediately take action to stop, contain, and cleanup unauthorized discharges 

or otherwise stop the noncompliance and correct the problem.

2. If applicable, immediately repeat sampling and analysis. Submit the results of 

any repeat sampling to Ecology within thirty (30) days of sampling.

a. Immediate reporting

The Permittee must immediately report to Ecology and the Department of 

Health, Shellfish Program, and the King County Department of Public Health

(at the numbers listed below), all:

 Failures of the disinfection system.

 Collection system overflows that may reach surface waters.

 Plant bypasses discharging to marine waters.

 Any other failures of the sewage system (pipe breaks, etc.)

Northwest Regional Office 425-649-7000

Department of Health, Shellfish 

Program

360-236-3330 (business hours)

360-789-8962 (after business hours)

King County Department of Public 

Health (Wastewater Program)

206-296-4932

b. Twenty-four-hour reporting

The Permittee must report the following occurrences of noncompliance by 

telephone, to Ecology at the telephone numbers listed above, within 24 hours 

from the time the Permittee becomes aware of any of the following 

circumstances: 

1. Any noncompliance that may endanger health or the environment, unless 

previously reported under immediate reporting requirements.

2. Any unanticipated bypass that causes an exceedance of an effluent limit in 

the permit (See Part S5.F, “Bypass Procedures”).

3. Any upset that causes an exceedance of an effluent limit in the permit (See 

G.15, “Upset”).
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Permit No. WA0023451

4. Any violation of a maximum daily or instantaneous maximum discharge 

limit for any of the pollutants in Section S1.A of this permit.

5. Any overflow prior to the treatment works, whether or not such overflow 

endangers health or the environment or exceeds any effluent limit in the 

permit. 

c. Report within five days

The Permittee must also submit a written report within five days of the time that 

the Permittee becomes aware of any reportable event under subparts a or b, 

above. The report must contain:

1. A description of the noncompliance and its cause. 

2. The period of noncompliance, including exact dates and times.

3. The estimated time the Permittee expects the noncompliance to continue if 

not yet corrected.

4. Steps taken or planned to reduce, eliminate, and prevent recurrence of the 

noncompliance.

5. If the noncompliance involves an overflow prior to the treatment works, 

an estimate of the quantity (in gallons) of untreated overflow.

d. Waiver of written reports

Ecology may waive the written report required in subpart c, above, on a 

case-by-case basis upon request if the Permittee has submitted a timely oral 

report.

e. All other permit violation reporting

The Permittee must report all permit violations, which do not require 

immediate or within 24 hours reporting, when it submits monitoring reports 

for S3.A ("Reporting"). The reports must contain the information listed in 

subpart c, above. Compliance with these requirements does not relieve the 

Permittee from responsibility to maintain continuous compliance with the 

terms and conditions of this permit or the resulting liability for failure to 

comply.

f. Report submittal

The Permittee must submit reports to the address listed in S3.A.

S3.F. Other reporting

a. Spills of Oil or Hazardous Materials

The Permittee must report a spill of oil or hazardous materials in accordance 

with the requirements of RCW 90.56.280 and chapter 173-303-145 WAC. 

You can obtain further instructions at the following website: 

http://www.ecy.wa.gov/programs/spills/other/reportaspill.htm .
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Permit No. WA0023451

b. Failure to submit relevant or correct facts

Where the Permittee becomes aware that it failed to submit any relevant facts 

in a permit application, or submitted incorrect information in a permit 

application, or in any report to Ecology, it must submit such facts or 

information promptly.

S3.G. Maintaining a copy of this permit

The Permittee must keep a copy of this permit at the facility and make it available 

upon request to Ecology inspectors.

S4. Facility loading

S4.A. Design criteria

The flows or waste loads for the permitted facility must not exceed the following 

design criteria:

Maximum Month Design Flow (MMDF) 5.6 MGD

BOD5 Influent Loading for Maximum Month 9,760 lbs/day

TSS Influent Loading for Maximum Month 11,710 lbs/day

S4.B. Plans for maintaining adequate capacity

a. Conditions triggering plan submittal

The Permittee must submit a plan and a schedule for continuing to maintain 

capacity to Ecology when:

1. The actual flow or waste load reaches 85 percent of any one of the design 

criteria in S4.A for three consecutive months Or;

2. The projected plant flow or loading would reach design capacity within 

five years. 

b. Plan and schedule content

The plan and schedule must identify the actions necessary to maintain 

adequate capacity for the expected population growth and to meet the limits 

and requirements of the permit. The Permittee must consider the following 

topics and actions in its plan.

1. Analysis of the present design and proposed process modifications

2. Reduction or elimination of excessive infiltration and inflow of 

uncontaminated ground and surface water into the sewer system

3. Limits on future sewer extensions or connections or additional waste loads

4. Modification or expansion of facilities

5. Reduction of industrial or commercial flows or waste loads

Engineering documents associated with the plan must meet the requirements 

of chapter 173-240-060 WAC, "Engineering Report," and be approved by 

Ecology prior to any construction. 
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Permit No. WA0023451

S4.C. Duty to mitigate

The Permittee must take all reasonable steps to minimize or prevent any discharge or 

sludge use or disposal in violation of this permit that has a reasonable likelihood of 

adversely affecting human health or the environment.

S4.D. Notification of new or altered sources

1. The Permittee must submit written notice to Ecology whenever any new discharge 

or a substantial change in volume or character of an existing discharge into the 

wastewater treatment plant is proposed which:

a. Would interfere with the operation of, or exceed the design capacity of, any 

portion of the wastewater treatment plant.

b. Is not part of an approved general sewer plan or approved plans and specifications.

c. Is subject to pretreatment standards under 40 CFR Part 403 and Section 307(b) 

of the Clean Water Act. 

2. This notice must include an evaluation of the wastewater treatment plant’s ability 

to adequately transport and treat the added flow and/or waste load, the quality and 

volume of effluent to be discharged to the treatment plant, and the anticipated 

impact on the Permittee’s effluent [40 CFR 122.42(b)]. 

S4.E. Infiltration and inflow evaluation

1. The Permittee must conduct an infiltration and inflow evaluation. Refer to the 

U.S. EPA publication, I/I Analysis and Project Certification, available as 

Ecology Publication No. 97-03 at:

http://www.ecy.wa.gov/programs/wq/permits/guidance.html

2. The Permittee may use monitoring records to assess measurable infiltration 

and inflow.

3. The Permittee must prepare a report summarizing any measurable infiltration 

and inflow. If infiltration and inflow have increased by more than 15 percent 

from that found in the previous report based on equivalent rainfall, the report 

must contain a plan and a schedule to locate the sources of infiltration and 

inflow and to correct the problem.

4. The Permittee must submit a report summarizing the results of the evaluation 

and any recommendations for corrective actions by April 30, 2016.

S5. Operation and maintenance

The Permittee must at all times properly operate and maintain all facilities and systems of 

treatment and control (and related appurtenances), which are installed to achieve compliance 

with the terms and conditions of this permit. Proper operation and maintenance also includes 

keeping a daily operation logbook (paper or electronic), adequate laboratory controls, and 

appropriate quality assurance procedures. This provision of the permit requires the Permittee 

to operate backup or auxiliary facilities or similar systems only when the operation is necessary 

to achieve compliance with the conditions of this permit.
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Permit No. WA0023451

S5.A. Certified operator

This permitted facility must be operated by an operator certified by the state of 

Washington for at least a Class III plant. This operator must be in responsible charge of 

the day-to-day operation of the wastewater treatment plant. An operator certified for at 

least a Class II plant must be in charge during all regularly scheduled shifts.

S5.B. Operation and maintenance program

The Permittee must:

1. Institute an adequate operation and maintenance program for the entire sewage 

system. 

2. Keep maintenance records on all major electrical and mechanical components 

of the treatment plant, as well as the sewage system and pumping stations. 

Such records must clearly specify the frequency and type of maintenance 

recommended by the manufacturer and must show the frequency and type of 

maintenance performed. 

3. Make maintenance records available for inspection at all times. 

S5.C. Short-term reduction

The Permittee must schedule any facility maintenance, which might require interruption 

of wastewater treatment and degrade effluent quality, during non-critical water quality 

periods and carry this maintenance out in a manner approved by Ecology.

If a Permittee contemplates a reduction in the level of treatment that would cause a 

violation of permit discharge limits on a short-term basis for any reason, and such 

reduction cannot be avoided, the Permittee must: 

1. Give written notification to Ecology, if possible, thirty (30) days prior to such 

activities. 

2. Detail the reasons for, length of time of, and the potential effects of the reduced 

level of treatment. 

This notification does not relieve the Permittee of its obligations under this permit.

S5.D. Electrical power failure

The Permittee must ensure that adequate safeguards prevent the discharge of untreated 

wastes or wastes not treated in accordance with the requirements of this permit during 

electrical power failure at the treatment plant and/or sewage lift stations. Adequate 

safeguards include, but are not limited to, alternate power sources, standby 

generator(s), or retention of inadequately treated wastes. 

The Permittee must maintain Reliability Class II (EPA 430-99-74-001) at the 

wastewater treatment plant. Reliability Class II requires a backup power source 

sufficient to operate all vital components and critical lighting and ventilation during 

peak wastewater flow conditions. Vital components used to support the secondary 

processes (i.e., mechanical aerators or aeration basin air compressors) need not be 

operable to full levels of treatment, but must be sufficient to maintain the biota.
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Permit No. WA0023451

S5.E. Prevent connection of inflow

The Permittee must strictly enforce its sewer ordinances and not allow the connection 

of inflow (roof drains, foundation drains, etc.) to the sanitary sewer system.

S5.F. Bypass procedures

This permit prohibits a bypass, which is the intentional diversion of waste streams 

from any portion of a treatment facility. Ecology may take enforcement action against 

a Permittee for a bypass unless one of the following circumstances (1, 2, or 3) applies.

1. Bypass for essential maintenance without the potential to cause violation of 

permit limits or conditions.

This permit authorizes a bypass if it allows for essential maintenance and does 

not have the potential to cause violations of limits or other conditions of this 

permit, or adversely impact public health as determined by Ecology prior to the 

bypass. The Permittee must submit prior notice, if possible, at least ten (10) days 

before the date of the bypass.

2. Bypass which is unavoidable, unanticipated, and results in noncompliance of 

this permit.

This permit authorizes such a bypass only if:

a. Bypass is unavoidable to prevent loss of life, personal injury, or severe property 

damage. “Severe property damage” means substantial physical damage to 

property, damage to the treatment facilities which would cause them to become 

inoperable, or substantial and permanent loss of natural resources which can 

reasonably be expected to occur in the absence of a bypass.

b. No feasible alternatives to the bypass exist, such as:

 The use of auxiliary treatment facilities. 

 Retention of untreated wastes.

 Maintenance during normal periods of equipment downtime, but not if 

the Permittee should have installed adequate backup equipment in the 

exercise of reasonable engineering judgment to prevent a bypass. 

 Transport of untreated wastes to another treatment facility or preventative 

maintenance), or transport of untreated wastes to another treatment facility.

c. Ecology is properly notified of the bypass as required in Special Condition 

S3.E of this permit.

3. If bypass is anticipated and has the potential to result in noncompliance of this permit.

a. The Permittee must notify Ecology at least thirty (30) days before the 

planned date of bypass. The notice must contain: 

 A description of the bypass and its cause. 

 An analysis of all known alternatives which would eliminate, reduce, 

or mitigate the need for bypassing. 
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Permit No. WA0023451

 A cost-effectiveness analysis of alternatives including comparative 

resource damage assessment. 

 The minimum and maximum duration of bypass under each alternative.

 A recommendation as to the preferred alternative for conducting the bypass. 

 The projected date of bypass initiation. 

 A statement of compliance with SEPA. 

 A request for modification of water quality standards as provided for 

in WAC 173-201A-410, if an exceedance of any water quality 

standard is anticipated. 

 Details of the steps taken or planned to reduce, eliminate, and prevent 

reoccurrence of the bypass.

b. For probable construction bypasses, the Permittee must notify Ecology of 

the need to bypass as early in the planning process as possible. The 

Permittee must consider the analysis required above during preparation of 

the engineering report or facilities plan and plans and specifications and 

must include these to the extent practical. In cases where the Permittee 

determines the probable need to bypass early, the Permittee must continue 

to analyze conditions up to and including the construction period in an 

effort to minimize or eliminate the bypass.

c. Ecology will consider the following prior to issuing an administrative 

order for this type of bypass:

 If the bypass is necessary to perform construction or maintenance-related 

activities essential to meet the requirements of this permit.

 If feasible alternatives to bypass exist, such as the use of auxiliary 

treatment facilities, retention of untreated wastes, stopping production, 

maintenance during normal periods of equipment down time, or 

transport of untreated wastes to another treatment facility.

 If the Permittee planned and scheduled the bypass to minimize adverse 

effects on the public and the environment.

After consideration of the above and the adverse effects of the proposed bypass and 

any other relevant factors, Ecology will approve or deny the request. Ecology will 

give the public an opportunity to comment on bypass incidents of significant 

duration, to the extent feasible. Ecology will approve a request to bypass by issuing 

an administrative order under RCW 90.48.120. 

S5.G. Operations and maintenance (O&M) manual

a. O&M manual submittal and requirements

The Permittee must:

1. Update the Operations and Maintenance (O&M) Manual that meets the 

requirements of chapter 173-240-080 WAC and submit it to Ecology for 

approval by June 30, 2015. The Permittee must submit a paper copy and an 

electronic copy (preferably as a PDF).
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Permit No. WA0023451

2. Review the O&M Manual once per permit cycle after the first submittal

and confirm this review by letter to Ecology by June 30, 2017. 

3. Submit to Ecology for review and approval substantial changes or updates 

to the O&M Manual whenever it incorporates them into the manual. The 

Permittee must submit a paper copy and an electronic copy (preferably as 

a PDF).

4. Keep the approved O&M Manual at the permitted facility.

5. Follow the instructions and procedures of this manual.

b. O&M manual components

In addition to the requirements of WAC 173-240-080 (1) through (5), the 

O&M Manual must include:

1. Emergency procedures for cleanup in the event of wastewater system 

upset or failure.

2. A review of system components which if failed could pollute surface 

water or could impact human health. Provide a procedure for a routine 

schedule of checking the function of these components.

3. Wastewater system maintenance procedures that contribute to the 

generation of process wastewater.

4. Reporting protocols for submitting reports to Ecology to comply with the 

reporting requirements in the discharge permit.

5. Any directions to maintenance staff when cleaning or maintaining other 

equipment or performing other tasks which are necessary to protect the 

operation of the wastewater system (for example, defining maximum 

allowable discharge rate for draining a tank, blocking all floor drains 

before beginning the overhaul of a stationary engine).

6. The treatment plant process control monitoring schedule.

7. Minimum staffing adequate to operate and maintain the treatment 

processes and carry out compliance monitoring required by the permit.

8. Specify other items on case-by-case basis such as O&M for collection 

systems pump stations, lagoon liners, etc.

S6. Pretreatment

S6.A. General requirements

The Permittee must work with Ecology to ensure that all commercial and 

industrial users of the publicly owned treatment works (POTW) comply with the 

pretreatment regulations in 40 CFR Part 403 and any additional regulations that 

the Environmental Protection Agency (U.S. EPA) may promulgate under Section 

307(b) (pretreatment) and 308 (reporting) of the Federal Clean Water Act.
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Permit No. WA0023451

S6.B. Duty to enforce discharge prohibitions

1. Under federal regulations (40 CFR 403.5(a) and (b)), the Permittee must not 

authorize or knowingly allow the discharge of any pollutants into its POTW 

which may be reasonably expected to cause pass through or interference, or 

which otherwise violate general or specific discharge prohibitions contained 

in 40 CFR Part 403.5 or WAC-173-216-060.

2. The Permittee must not authorize or knowingly allow the introduction of any 

of the following into their treatment works:

a. Pollutants which create a fire or explosion hazard in the POTW (including, 

but not limited to waste streams with a closed cup flashpoint of less than 

140 degrees Fahrenheit or 60 degrees Centigrade 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 pH lower than 5.0, or greater than 11.0 standard 

units, unless the works are specifically designed to accommodate such 

discharges.

c. Solid or viscous pollutants in amounts that could cause obstruction to the 

flow in sewers or otherwise interfere with the operation of the POTW.

d. Any pollutant, including oxygen-demanding pollutants, (BOD5, etc.) 

released in a discharge at a flow rate and/or pollutant concentration which 

will cause interference with the POTW. 

e. Petroleum oil, non-biodegradable cutting oil, or products of mineral origin 

in amounts that will cause interference or pass through.

f. Pollutants which result in the presence of toxic gases, vapors, or fumes 

within the POTW in a quantity which may cause acute worker health and 

safety problems.

g. Heat in amounts that will inhibit biological activity in the POTW resulting 

in interference but in no case heat in such quantities such that the 

temperature at the POTW headworks exceeds 40 degrees Centigrade (104 

degrees Fahrenheit) unless Ecology, upon request of the Permittee, 

approves, in writing, alternate temperature limits.

h. Any trucked or hauled pollutants, except at discharge points designated by 

the Permittee.

i. Wastewaters prohibited to be discharged to the POTW by the Dangerous 

Waste Regulations (chapter 173-303 WAC), unless authorized under the 

Domestic Sewage Exclusion (WAC 173-303-071).

3. The Permittee must also not allow the following discharges to the POTW 

unless approved in writing by Ecology:

a. Noncontact cooling water in significant volumes.

b. Stormwater and other direct inflow sources.
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Permit No. WA0023451

c. Wastewaters significantly affecting system hydraulic loading, which do 

not require treatment, or would not be afforded a significant degree of 

treatment by the system.

4. The Permittee must notify Ecology if any industrial user violates the 

prohibitions listed in this section (S6.B), and initiate enforcement action to 

promptly curtail any such discharge.

S6.C. Wastewater discharge permit required

The Permittee must

1. Establish a process for authorizing non-domestic wastewater discharges that 

ensures all SIUs in all tributary areas meet the applicable state waste discharge 

permit (SWDP) requirements in accordance with chapter 90.48 RCW and 

chapter 173-216 WAC.

2. Immediately notify Ecology of any proposed discharge of wastewater from a 

source, which may be a significant industrial user (SIU) [see fact sheet

definitions or refer to 40 CFR 403.3(v)(i)(ii)]. 

3. Require all SIUs to obtain a SWDP from Ecology prior to accepting their nondomestic wastewater, or require proof that Ecology has determined they do 

not require a permit. 

4. Require the documentation as described in S6.C.3 at the earliest practicable 

date as a condition of continuing to accept non-domestic wastewater 

discharges from a previously undiscovered, currently discharging and 

unpermitted SIU. 

5. Require sources of non-domestic wastewater, which do not qualify as SIUs 

but merit a degree of oversight, to apply for a SWDP and provide it a copy of 

the application and any Ecology responses.

6. Keep all records documenting that its users have met the requirements of 

S6.C.

S6.D. Identification and reporting of existing, new, and proposed industrial users

1. The Permittee must take continuous, routine measures to identify all existing, 

new, and proposed SIUs and potential significant industrial users (PSIUs) 

discharging or proposing to discharge to the Permittee's sewer system (see 

Appendix C of the fact sheet for definitions). 

2. Within 30 days of becoming aware of an unpermitted existing, new, or 

proposed industrial user who may be a significant industrial user (SIU), the 

Permittee must notify such user by registered mail that, if classified as an SIU, 

they must apply to Ecology and obtain a State Waste Discharge Permit. The 

Permittee must send a copy of this notification letter to Ecology within this 

same 30-day period.
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Permit No. WA0023451

3. The Permittee must also notify all Potential SIUs (PSIUs), as they are 

identified, that if their classification should change to an SIU, they must apply 

to Ecology for a State Waste Discharge Permit within 30 days of such change.

S7. Solid wastes

S7.A. Solid waste handling

The Permittee must handle and dispose of all solid waste material in such a 

manner as to prevent its entry into state ground or surface water.

S7.B. Leachate

The Permittee must not allow leachate from its solid waste material to enter state 

waters without providing all known, available, and reasonable methods of treatment, 

nor allow such leachate to cause violations of the State Surface Water Quality 

Standards, Chapter 173-201A WAC, or the State Ground Water Quality Standards, 

Chapter 173-200 WAC. The Permittee must apply for a permit or permit 

modification as may be required for such discharges to state ground or surface waters.

S8. Application for permit renewal or modification for facility changes

The Permittee must submit an application for renewal of this permit by September 30, 2017. 

The Permittee must submit a paper copy and an electronic copy (preferably as a PDF).

The Permittee must also submit a new application or supplement at least one hundred eighty 

(180) days prior to commencement of discharges, resulting from the activities listed below, 

which may result in permit violations. These activities include any facility expansions, 

production increases, or other planned changes, such as process modifications, in the permitted 

facility.

S9. Sediment monitoring 

S9.A. Sediment sampling and analysis plan

The Permittee must submit to Ecology for review and approval a sediment sampling and 

analysis plan for sediment monitoring by March 31, 2015. The Permittee must submit 

two paper copies and an electronic copy (preferably as a PDF).The purpose of the plan is 

to re-characterize sediment (the nature and extent of chemical contamination and 

biological toxicity) quality in the vicinity of the Permittee’s discharge location. The 

Permittee must follow the guidance provided in the Sediment Source Control Standards

User Manual, Appendix B: sediment sampling and analysis plan (Ecology, 2008).

S9.B. Sediment data report

Following Ecology approval of the Sediment Sampling and Analysis Plan, the 

Permittee must collect sediments between August 15, 2016 and September 15, 2016. 

The Permittee must submit to Ecology a Sediment Data Report containing the results of 

the sediment sampling and analysis no later than March 31, 2017. The Permittee must 

submit two paper copies and an electronic copy (preferably as a PDF). The sediment 

data report must conform to the approved sediment sampling and analysis plan. 
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Permit No. WA0023451

In addition to a Sediment Data Report, the sediment chemical and biological data 

must be submitted to Ecology’s EIM database (http://www.ecy.wa.gov/eim/). 

Ecology’s MyEIM tools must be used to confirm the accuracy of the submitted 

data (http://www.ecy.wa.gov/eim/MyEIM.htm).

S10. Acute toxicity

S10.A. Effluent characterization

The Permittee must:

1. Conduct quarterly acute toxicity testing on the final effluent for one year starting in 

the 4th quarter 2013 (October-December). Quarters means January through March, 

April through June, July through September, and October through December.

2. Submit a quarterly written report to Ecology for one year within 45 days of 

sampling and starting no later than January 30, 2014. Subsequent reports are due 

on April 30, 2014, July 30, 2014, and October 30, 2014. Further instructions on 

testing conditions and test report content are in Section S10.G below. 

3. Use a dilution series consisting of a minimum of five concentrations and a 

control. The five concentrations should include the ACEC of 1.27 % effluent.

4. Conduct the following two acute toxicity tests on each sample:

Acute Toxicity Tests Species Method

Fathead minnow 96-hour 

static-renewal test 

Pimephales promelas EPA-821-R-02-012

Daphnid 48-hour static test Ceriodaphnia dubia, Daphnia 

pulex, or Daphnia magna

EPA-821-R-02-012

5. The effluent limit for acute toxicity listed in Section S10.B below applies if 

after one year of effluent characterization:

 The median survival of any species in 100% effluent is below 80%.

 Any one test of any species exhibits less than 65% survival in 100% effluent.

If the effluent limit applies, then the Permittee must immediately follow the 

instructions in Sections S10.B, S10.C, S10.D, S10.E, and S10.G. If the effluent 

limit does not apply, then the Permittee must follow the instructions in Sections 

S10.F and S10.G.

S10.B. Effluent limit for acute toxicity

The effluent limit for acute toxicity is:

No acute toxicity detected in a test concentration representing the acute 

critical effluent concentration (ACEC).

The ACEC means the maximum concentration of effluent during critical 

conditions at the boundary of the acute mixing zone, defined in Section S1.B of 

this permit. The ACEC equals 1.27 % effluent.
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Permit No. WA0023451

S10.C. Compliance with the effluent limit for acute toxicity

Compliance with the effluent limit for acute toxicity means the results of the 

testing specified in Section S10.D show no statistically significant difference in 

survival between the control and the ACEC. 

If the test results show a statistically significant difference in survival between the 

control and the ACEC, the test does not comply with the effluent limit for acute 

toxicity. The Permittee must then immediately conduct the additional testing 

described in Section S10.E. The Permittee will comply with the requirements of 

this section by meeting the requirements of Section S10.E.

The Permittee must determine the statistical significance by conducting a 

hypothesis test at the 0.05 level of significance (Appendix H, EPA/600/4-89/001). 

If the difference in survival between the control and the ACEC is less than 10%, 

the Permittee must conduct the hypothesis test at the 0.01 level of significance.

S10.D. Compliance testing for acute toxicity

The Permittee must:

1. Perform the acute toxicity tests with 100% effluent, the ACEC, and a control, 

or with a full dilution series.

2. Conduct quarterly acute toxicity testing on the final effluent if characterization 

determines that the effluent limit for acute toxicity applies. Testing must 

begin by 4

th quarter 2014. Quarters means January through March, April 

through June, July through September, and October through December.

3. Submit a quarterly written report to Ecology within 45 days of sampling and 

starting no later than January 30, 2015. Each subsequent report is due on 

April 30th, July 30th, October 30th, and January 30th of each year. Further 

instructions on testing conditions and test report content are in Section S10.G 

below.

4. The Permittee must perform compliance tests using each of the species and 

protocols listed below on a rotating basis:

Acute Toxicity Tests Species Method

Fathead minnow 96-hour 

static-renewal test 

Pimephales promelas EPA-821-R-02-012

Daphnid 48-hour static test Ceriodaphnia dubia, 

Daphnia pulex, or

Daphnia magna

EPA-821-R-02-012

S10.E. Response to noncompliance with the effluent limit for acute toxicity 

If a toxicity test conducted under Section S10.D determines a statistically 

significant difference in response between the ACEC and the control, using the 

statistical test described in Section S10.C, the Permittee must begin additional

testing within one week from the time of receiving the test results. The Permittee 

must:
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Permit No. WA0023451

1. Conduct one additional test each week for four consecutive weeks, using the 

same test and species as the failed compliance test.

2. Test at least five effluent concentrations and a control to determine 

appropriate point estimates. One of these effluent concentrations must equal 

the ACEC. The results of the test at the ACEC will determine compliance 

with the effluent limit for acute toxicity as described in Section S10.C. 

3. Return to the original monitoring frequency in Section S10.D after completion 

of the additional compliance monitoring.

Anomalous test results: If a toxicity test conducted under Section S10.D

indicates noncompliance with the acute toxicity limit and the Permittee believes 

that the test result is anomalous, the Permittee may notify Ecology that the 

compliance test result may be anomalous. The Permittee may take one additional 

sample for toxicity testing and wait for notification from Ecology before 

completing the additional testing. The Permittee must submit the notification 

with the report of the compliance test result and identify the reason for 

considering the compliance test result to be anomalous. 

If Ecology determines that the test result was not anomalous, the Permittee must 

complete all of the additional monitoring required in this section. Or,

If the one additional sample fails to comply with the effluent limit for acute 

toxicity, then the Permittee must complete all of the additional monitoring 

required in this section. Or,

If Ecology determines that the test result was anomalous, the one additional test 

result will replace the anomalous test result.

If all of the additional testing in this section complies with the permit limit, the 

Permittee must submit a report to Ecology on possible causes and preventive 

measures for the transient toxicity event, which triggered the additional 

compliance monitoring. This report must include a search of all pertinent and 

recent facility records, including:

 Operating records

 Monitoring results

 Inspection records

 Spill reports

 Weather records

 Production records

 Raw material purchases

 Pretreatment records, etc.

If the additional testing in this section shows another violation of the acute 

toxicity limit, the Permittee must submit a Toxicity Identification/Reduction 

Evaluation (TI/RE) plan to Ecology within sixty (60) days after the sample date 

(WAC 173-205-100(2)).
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Permit No. WA0023451

S10.F. Testing when there is no permit limit for acute toxicity (if the characterization 

testing in S10.A shows no acute toxicity)

The Permittee must:

1. Conduct acute toxicity testing on final effluent during the 3

rd quarter 2016 

(July-September) and 1

st quarter 2017 (January-March) prior to submission of 

the application for permit renewal. 

2. Submit the results to Ecology by October 30, 2016, and April 30, 2017,

respectively.

3. Conduct acute toxicity testing on a series of at least five concentrations of 

effluent, including 100% effluent and a control.

4. Use each of the following species and protocols for each acute toxicity test:

Acute Toxicity Tests Species Method

Fathead minnow 96-hour 

static-renewal test 

Pimephales promelas EPA-821-R-02-012

Daphnid 48-hour static test Ceriodaphnia dubia, Daphnia 

pulex, or Daphnia magna

EPA-821-R-02-012

S10.G. Sampling and reporting requirements

1. The Permittee must submit all reports for toxicity testing in accordance with 

the most recent version of Ecology Publication No. WQ-R-95-80, Laboratory 

Guidance and Whole Effluent Toxicity Test Review Criteria. Reports must 

contain bench sheets and reference toxicant results for test methods. If the lab 

provides the toxicity test data in electronic format for entry into Ecology’s 

database, then the Permittee must send the data to Ecology along with the test 

report, bench sheets, and reference toxicant results.

2. The Permittee must collect 24-hour composite effluent samples for toxicity 

testing. The Permittee must cool the samples to 0 - 6 degrees Celsius during 

collection and send them to the lab immediately upon completion. The lab 

must begin the toxicity testing as soon as possible but no later than 36 hours 

after sampling was completed.

3. The laboratory must conduct water quality measurements on all samples and 

test solutions for toxicity testing, as specified in the most recent version of 

Ecology Publication No. WQ-R-95-80, Laboratory Guidance and Whole 

Effluent Toxicity Test Review Criteria.

4. All toxicity tests must meet quality assurance criteria and test conditions 

specified in the most recent versions of the EPA methods listed in Subsection

C and the Ecology Publication No. WQ-R-95-80, Laboratory Guidance and 

Whole Effluent Toxicity Test Review Criteria. If Ecology determines any test 

results to be invalid or anomalous, the Permittee must repeat the testing with 

freshly collected effluent.
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Permit No. WA0023451

5. The laboratory must use control water and dilution water meeting the requirements 

of the EPA methods listed in Section A or pristine natural water of sufficient quality 

for good control performance.

6. The Permittee must conduct whole effluent toxicity tests on an unmodified 

sample of final effluent.

7. The Permittee may choose to conduct a full dilution series test during compliance 

testing in order to determine dose response. In this case, the series must have a 

minimum of five effluent concentrations and a control. The series of concentrations 

must include the acute critical effluent concentration (ACEC). The ACEC equals 

1.27% effluent.

8. All whole effluent toxicity tests, effluent screening tests, and rapid screening 

tests that involve hypothesis testing must comply with the acute statistical power 

standard of 29% as defined in WAC 173-205-020. If the test does not meet the 

power standard, the Permittee must repeat the test on a fresh sample with an 

increased number of replicates to increase the power.

S11. Chronic toxicity

S11.A. Testing when there is no permit limit for chronic toxicity

The Permittee must:

1. Conduct chronic toxicity testing on final effluent 4

th quarter 2016 (OctoberDecember) and during the 2nd quarter 2017 (April-June) prior to submission of 

the application for permit renewal.

2. Submit the results to Ecology by January 30, 2017, and July 30, 2017, respectively.

3. Conduct chronic toxicity testing on a series of at least five concentrations of 

effluent and a control. This series of dilutions must include the acute critical 

effluent concentration (ACEC). The ACEC equals 1.27% effluent. The series 

of dilutions should also contain the CCEC of 0.55% effluent.

4. Compare the ACEC to the control using hypothesis testing at the 0.05 level of 

significance as described in Appendix H, EPA/600/4-89/001.

5. Perform chronic toxicity tests with all of the following species and the most 

recent version of the following protocols:

Saltwater Chronic Test Species Method

Topsmelt survival and growth Atherinops affinis EPA/600/R-95/136

Mysid shrimp survival and growth Americamysis bahia 

(formerly Mysidopsis bahia)

EPA-821-R-02-014

S11.B. Sampling and reporting requirements

1. The Permittee must submit all reports for toxicity testing in accordance with 

the most recent version of Ecology Publication No. WQ-R-95-80, Laboratory 

Guidance and Whole Effluent Toxicity Test Review Criteria. Reports must 

contain bench sheets and reference toxicant results for test methods. If the lab 
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Permit No. WA0023451

provides the toxicity test data in electronic format for entry into Ecology’s 

database, then the Permittee must send the data to Ecology along with the test 

report, bench sheets, and reference toxicant results.

2. The Permittee must collect 24-hour composite effluent samples for toxicity 

testing. The Permittee must cool the samples to 0 - 6 degrees Celsius during 

collection and send them to the lab immediately upon completion. The lab 

must begin the toxicity testing as soon as possible but no later than 36 hours 

after sampling was completed.

3. The laboratory must conduct water quality measurements on all samples and 

test solutions for toxicity testing, as specified in the most recent version of 

Ecology Publication No. WQ-R-95-80, Laboratory Guidance and Whole 

Effluent Toxicity Test Review Criteria.

4. All toxicity tests must meet quality assurance criteria and test conditions 

specified in the most recent versions of the EPA methods listed in Section C 

and the Ecology Publication no. WQ-R-95-80, Laboratory Guidance and 

Whole Effluent Toxicity Test Review Criteria. If Ecology determines any test 

results to be invalid or anomalous, the Permittee must repeat the testing with 

freshly collected effluent.

5. The laboratory must use control water and dilution water meeting the 

requirements of the EPA methods listed in Subsection C or pristine natural 

water of sufficient quality for good control performance.

6. The Permittee must conduct whole effluent toxicity tests on an unmodified 

sample of final effluent.

7. The Permittee may choose to conduct a full dilution series test during 

compliance testing in order to determine dose response. In this case, the 

series must have a minimum of five effluent concentrations and a control. 

The series of concentrations must include the CCEC and the ACEC. The 

CCEC and the ACEC may either substitute for the effluent concentrations that 

are closest to them in the dilution series or be extra effluent concentrations. 

The ACEC equals 1.27% effluent. The CCEC equals 0.55% effluent.

8. All whole effluent toxicity tests that involve hypothesis testing must comply 

with the chronic statistical power standard of 39% as defined in chapter 

173-205-020 WAC. If the test does not meet the power standard, the 

Permittee must repeat the test on a fresh sample with an increased number of 

replicates to increase the power.
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Permit No. WA0023451

General Conditions

G1. Signatory requirements

1. All applications, reports, or information submitted to Ecology must be signed and 

certified.

a. In the case of corporations, by a responsible corporate officer. For the purpose of 

this section, a responsible corporate officer means: 

 A president, secretary, treasurer, or vice-president of the corporation in charge 

of a principal business function, or any other person who performs similar 

policy or decision making functions for the corporation, or 

 The manager of one or more manufacturing, production, or operating 

facilities, provided, the manager is authorized to make management decisions 

which govern the operation of the regulated facility including having the 

explicit or implicit duty of making major capital investment 

recommendations, and initiating and directing other comprehensive measures 

to assure long-term environmental compliance with environmental laws and 

regulations; the manager can ensure that the necessary systems are established 

or actions taken to gather complete and accurate information for permit 

application requirements; and where authority to sign documents has been 

assigned or delegated to the manager in accordance with corporate 

procedures. 

 In the case of a partnership, by a general partner.

 In the case of sole proprietorship, by the proprietor.

 In the case of a municipal, state, or other public facility, by either a principal 

executive officer or ranking elected official.

Applications for permits for domestic wastewater facilities that are either owned or 

operated by, or under contract to, a public entity shall be submitted by the public 

entity.

2. All reports required by this permit and other information requested by Ecology must 

be signed by a person described above or by a duly authorized representative of that 

person. A person is a duly authorized representative only if:

a. The authorization is made in writing by a person described above and submitted 

to Ecology.

b. The authorization specifies either an individual or a position having responsibility 

for the overall operation of the regulated facility, such as the position of plant 

manager, superintendent, position of equivalent responsibility, or an individual or 

position having overall responsibility for environmental matters. (A duly 

authorized representative may thus be either a named individual or any individual 

occupying a named position.)
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Permit No. WA0023451

3. Changes to authorization. If an authorization under paragraph G1.2, above, 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 

paragraph G1.2, above, must be submitted to Ecology 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 section must make the 

following certification:

“I certify under penalty of law, that this document and all attachments were prepared 

under my direction or supervision in accordance with a system designed to assure that 

qualified personnel properly gathered and evaluated the information submitted. 

Based on my inquiry of the person or persons who manage the system or those 

persons directly responsible for gathering information, the information submitted is, 

to the best of my knowledge and belief, true, accurate, and complete. I am aware that 

there are significant penalties for submitting false information, including the 

possibility of fine and imprisonment for knowing violations.”

G2. Right of inspection and entry

The Permittee must allow an authorized representative of Ecology, upon the presentation 

of credentials and such other documents as may be required by law:

1. To enter upon the premises where a discharge is located or where any records must be 

kept under the terms and conditions of this permit.

2. To have access to and copy, at reasonable times and at reasonable cost, any records 

required to be kept under the terms and conditions of this permit.

3. To inspect, at reasonable times, any facilities, equipment (including monitoring and 

control equipment), practices, methods, or operations regulated or required under this 

permit.

4. To sample or monitor, at reasonable times, any substances or parameters at any 

location for purposes of assuring permit compliance or as otherwise authorized by the 

Clean Water Act.

G3. Permit actions

This permit may be modified, revoked and reissued, or terminated either at the request of 

any interested person (including the Permittee) or upon Ecology’s initiative. However, 

the permit may only be modified, revoked and reissued, or terminated for the reasons 

specified in 40 CFR 122.62, 40 CFR 122.64 or WAC 173-220-150 according to the 

procedures of 40 CFR 124.5. 

1. The following are causes for terminating this permit during its term, or for denying a 

permit renewal application:

a. Violation of any permit term or condition.

b. Obtaining a permit by misrepresentation or failure to disclose all relevant facts.

c. A material change in quantity or type of waste disposal.
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Permit No. WA0023451

d. A determination that the permitted activity endangers human health or the 

environment, or contributes to water quality standards violations and can only be 

regulated to acceptable levels by permit modification or termination.

e. A change in any condition that requires either a temporary or permanent 

reduction, or elimination of any discharge or sludge use or disposal practice 

controlled by the permit.

f. Nonpayment of fees assessed pursuant to RCW 90.48.465.

g. Failure or refusal of the Permittee to allow entry as required in RCW 90.48.090.

2. The following are causes for modification but not revocation and reissuance except 

when the Permittee requests or agrees:

a. A material change in the condition of the waters of the state.

b. New information not available at the time of permit issuance that would have 

justified the application of different permit conditions.

c. Material and substantial alterations or additions to the permitted facility or 

activities which occurred after this permit issuance.

d. Promulgation of new or amended standards or regulations having a direct bearing 

upon permit conditions, or requiring permit revision.

e. The Permittee has requested a modification based on other rationale meeting the 

criteria of 40 CFR Part 122.62.

f. Ecology has determined that good cause exists for modification of a compliance 

schedule, and the modification will not violate statutory deadlines.

g. Incorporation of an approved local pretreatment program into a municipality’s 

permit.

3. The following are causes for modification or alternatively revocation and reissuance:

a. When cause exists for termination for reasons listed in 1.a through 1.g of this 

section, and Ecology determines that modification or revocation and reissuance is 

appropriate.

b. When Ecology has received notification of a proposed transfer of the permit. A 

permit may also be modified to reflect a transfer after the effective date of an 

automatic transfer (General Condition G7) but will not be revoked and reissued 

after the effective date of the transfer except upon the request of the new 

Permittee.

G4. Reporting planned changes

The Permittee must, as soon as possible, but no later than one hundred eighty (180) days 

prior to the proposed changes, give notice to Ecology of planned physical alterations or 

additions to the permitted facility, production increases, or process modification which 

will result in:
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Permit No. WA0023451

1. The permitted facility being determined to be a new source pursuant to 40 CFR 

122.29(b)

2. A significant change in the nature or an increase in quantity of pollutants discharged.

3. A significant change in the Permittee’s sludge use or disposal practices. Following 

such notice, and the submittal of a new application or supplement to the existing 

application, along with required engineering plans and reports, this permit may be 

modified, or revoked and reissued pursuant to 40 CFR 122.62(a) to specify and limit 

any pollutants not previously limited. Until such modification is effective, any new 

or increased discharge in excess of permit limits or not specifically authorized by this 

permit constitutes a violation.

G5. Plan review required

Prior to constructing or modifying any wastewater control facilities, an engineering 

report and detailed plans and specifications must be submitted to Ecology for approval in 

accordance with chapter 173-240 WAC. Engineering reports, plans, and specifications 

must be submitted at least one hundred eighty (180) days prior to the planned start of 

construction unless a shorter time is approved by Ecology. Facilities must be constructed 

and operated in accordance with the approved plans.

G6. Compliance with other laws and statutes

Nothing in this permit excuses the Permittee from compliance with any applicable 

federal, state, or local statutes, ordinances, or regulations.

G7. Transfer of this permit

In the event of any change in control or ownership of facilities from which the authorized 

discharge emanate, the Permittee must notify the succeeding owner or controller of the 

existence of this permit by letter, a copy of which must be forwarded to Ecology.

1. Transfers by Modification

Except as provided in paragraph (2) below, this permit may be transferred by the 

Permittee to a new owner or operator only if this permit has been modified or revoked 

and reissued under 40 CFR 122.62(b)(2), or a minor modification made under 40 

CFR 122.63(d), to identify the new Permittee and incorporate such other 

requirements as may be necessary under the Clean Water Act.

2. Automatic Transfers

This permit may be automatically transferred to a new Permittee if:

a. The Permittee notifies Ecology at least thirty (30) days in advance of the proposed 

transfer date.

b. The notice includes a written agreement between the existing and new Permittees

containing a specific date transfer of permit responsibility, coverage, and liability 

between them. 
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Permit No. WA0023451

c. Ecology does not notify the existing Permittee and the proposed new Permittee of 

its intent to modify or revoke and reissue this permit. A modification under this 

subparagraph may also be minor modification under 40 CFR 122.63. If this 

notice is not received, the transfer is effective on the date specified in the written 

agreement.

G8. Reduced production for compliance

The Permittee, in order to maintain compliance with its permit, must control production 

and/or all discharges upon reduction, loss, failure, or bypass of the treatment facility until 

the facility is restored or an alternative method of treatment is provided. This 

requirement applies in the situation where, among other things, the primary source of 

power of the treatment facility is reduced, lost, or fails.

G9. Removed substances

Collected screenings, grit, solids, sludges, filter backwash, or other pollutants removed in 

the course of treatment or control of wastewaters must not be resuspended or 

reintroduced to the final effluent stream for discharge to state waters. 

G10. Duty to provide information

The Permittee must submit to Ecology, within a reasonable time, all information which 

Ecology may request to determine whether cause exists for modifying, revoking and 

reissuing, or terminating this permit or to determine compliance with this permit. The 

Permittee must also submit to Ecology upon request, copies of records required to be 

kept by this permit. 

G11. Other requirements of 40 CFR

All other requirements of 40 CFR 122.41 and 122.42 are incorporated in this permit by 

reference.

G12. Additional monitoring

Ecology may establish specific monitoring requirements in addition to those contained in 

this permit by administrative order or permit modification.

G13. Payment of fees

The Permittee must submit payment of fees associated with this permit as assessed by 

Ecology.

G14. Penalties for violating permit conditions

Any person who is found guilty of willfully violating the terms and conditions of this 

permit is deemed guilty of a crime, and upon conviction thereof shall be punished by a 

fine of up to ten thousand dollars ($10,000) and costs of prosecution, or by imprisonment 

in the discretion of the court. Each day upon which a willful violation occurs may be 

deemed a separate and additional violation. 
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Permit No. WA0023451

Any person who violates the terms and conditions of a waste discharge permit may incur, 

in addition to any other penalty as provided by law, a civil penalty in the amount of up to 

ten thousand dollars ($10,000) for every such violation. Each and every such violation is 

a separate and distinct offense, and in case of a continuing violation, every day's 

continuance is deemed to be a separate and distinct violation.

G15. Upset

Definition – “Upset” means an exceptional incident in which there is unintentional and 

temporary noncompliance with technology-based permit effluent limits because of 

factors beyond the reasonable control of the Permittee. An upset does not include 

noncompliance to the extent caused by operational error, improperly designed treatment 

facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or 

improper operation.

An upset constitutes an affirmative defense to an action brought for noncompliance with 

such technology-based permit effluent limits if the requirements of the following 

paragraph are met.

A Permittee who wishes to establish the affirmative defense of upset must demonstrate, 

through properly signed, contemporaneous operating logs, or other relevant evidence 

that: 

1. An upset occurred and that the Permittee can identify the cause(s) of the upset.

2. The permitted facility was being properly operated at the time of the upset.

3. The Permittee submitted notice of the upset as required in Special Condition S3.E.

4. The Permittee complied with any remedial measures required under S3.E of this 

permit.

In any enforcement action the Permittee seeking to establish the occurrence of an upset 

has the burden of proof.

G16. Property rights

This permit does not convey any property rights of any sort, or any exclusive privilege.

G17. Duty to comply

The Permittee must comply with all conditions of this permit. Any permit 

noncompliance constitutes a violation of the Clean Water Act and is grounds for 

enforcement action; for permit termination, revocation and reissuance, or modification; 

or denial of a permit renewal application.

G18. Toxic pollutants

The Permittee must comply with effluent standards or prohibitions established under 

Section 307(a) of the Clean Water Act for toxic pollutants within the time provided in the 

regulations that establish those standards or prohibitions, even if this permit has not yet 

been modified to incorporate the requirement.
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Permit No. WA0023451

G19. Penalties for tampering

The Clean Water Act provides that any person who falsifies, tampers with, or knowingly 

renders inaccurate any monitoring device or method required to be maintained under this 

permit shall, upon conviction, be punished by a fine of not more than $10,000 per 

violation, or by imprisonment for not more than two (2) years per violation, or by both. 

If a conviction of a person is for a violation committed after a first conviction of such 

person under this condition, punishment shall be a fine of not more than $20,000 per day 

of violation, or by imprisonment of not more than four (4) years, or by both.

G20. Compliance schedules

Reports of compliance or noncompliance with, or any progress reports on, interim and 

final requirements contained in any compliance schedule of this permit must be 

submitted no later than fourteen (14) days following each schedule date.

G21. Service agreement review

The Permittee must submit to Ecology any proposed service agreements and proposed 

revisions or updates to existing agreements for the operation of any wastewater treatment 

facility covered by this permit. The review is to ensure consistency with chapters 90.46 

and 90.48 RCW as required by RCW 70.150.040(9). In the event that Ecology does not 

comment within a thirty-day (30) period, the Permittee may assume consistency and 

proceed with the service agreement or the revised/updated service agreement.
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Permit No. WA0023451

Appendix A 

LIST OF POLLUTANTS WITH ANALYTICAL METHODS, 

DETECTION LIMITS AND QUANTITATION LEVELS 

The Permittee must use the specified analytical methods, detection limits (DLs) and quantitation 

levels (QLs) in the following table for permit and application required monitoring unless:

 Another permit condition specifies other methods, detection levels, or quantitation levels.

 The method used produces measurable results in the sample and EPA has listed it as an 

EPA-approved method in 40 CFR Part 136.

If the Permittee uses an alternative method, not specified in the permit and as allowed above, it must

report the test method, DL, and QL on the discharge monitoring report or in the required report.

If the Permittee is unable to obtain the required DL and QL in its effluent due to matrix effects, the 

Permittee must submit a matrix-specific detection limit (MDL) and a quantitation limit (QL) to 

Ecology with appropriate laboratory documentation.

When the permit requires the Permittee to measure the base neutral compounds in the list of priority 

pollutants, it must measure all of the base neutral pollutants listed in the table below. The list 

includes EPA required base neutral priority pollutants and several additional polynuclear aromatic 

hydrocarbons (PAHs). The Water Quality Program added several PAHs to the list of base neutrals 

below from Ecology’s Persistent Bioaccumulative Toxics (PBT) List. It only added those PBT 

parameters of interest to Appendix A that did not increase the overall cost of analysis unreasonably.

Ecology added this appendix to the permit in order to reduce the number of analytical “non-detects” 

in permit-required monitoring and to measure effluent concentrations near or below criteria values 

where possible at a reasonable cost.

CONVENTIONAL PARAMETERS

Pollutant & CAS No. 

(if available)

Recommended 

Analytical Protocol

Detection (DL)1 

μg/L unless 

specified

Quantitation Level 

(QL) 2μg/L unless 

specified

Biochemical Oxygen Demand SM5210-B 2 mg/L

Soluble Biochemical Oxygen 

Demand SM5210-B 3

2 mg/L

Chemical Oxygen Demand SM5220-D 10 mg/L

Total Organic Carbon SM5310-B/C/D 1 mg/L

Total Suspended Solids SM2540-D 5 mg/L

Total Ammonia (as N) SM4500-NH3-B and 

C/D/E/G/H

20

Flow Calibrated device

Dissolved oxygen SM4500-OC/OG 0.2 mg/L

Temperature (max. 7-day avg.) Analog recorder or Use microrecording devices known as 

thermistors

0.2o C

pH SM4500-H

+ B N/A N/A
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Permit No. WA0023451

NONCONVENTIONAL PARAMETERS

Pollutant & CAS No. 

(if available)

Recommended 

Analytical Protocol

Detection (DL)1 

μg/L unless specified

Quantitation Level 

(QL) 2μg/L unless 

specified

Total Alkalinity SM2320-B 5 mg/L as CaCO3

Chlorine, Total Residual SM4500 Cl G 50.0

Color SM2120 B/C/E 10 color units

Fecal Coliform SM 9221E,9222 N/A Specified in method - sample 

aliquot dependent

Fluoride (16984-48-8) SM4500-F E 25 100

Nitrate + Nitrite Nitrogen (as N) SM4500-NO3- E/F/H 100

Nitrogen, Total Kjeldahl (as N) SM4500-NorgB/C and 

SM4500NH3-

B/C/D/EF/G/H

300

Soluble Reactive Phosphorus (as P) SM4500- PE/PF 3 10

Phosphorus, Total (as P) SM 4500 PB followed 

by SM4500-PE/PF

3 10

Oil and Grease (HEM) (Hexane 

Extractable Material)

1664 A or B 1,400 5,000

Salinity SM2520-B 3 practical salinity units or 

scale (PSU or PSS)

Settleable Solids SM2540 -F 500 (or 0.1 mL/L)

Sulfate (as mg/L SO4) SM4110-B 0.2 mg/L

Sulfide (as mg/L S) SM4500-S

2F/D/E/G 0.2 mg/L

Sulfite (as mg/L SO3) SM4500-SO3B 2 mg/L

Total Coliform SM 9221B, 9222B, 

9223B

N/A Specified in method - sample 

aliquot dependent

Total dissolved solids SM2540 C 20 mg/L

Total Hardness SM2340B 200 as CaCO3

Aluminum, Total (7429-90-5) 200.8 2.0 10

Barium Total (7440-39-3) 200.8 0.5 2.0

BTEX (benzene +toluene + 

ethylbenzene + m,o,p xylenes)

EPA SW 846 

8021/8260

1 2

Boron Total (7440-42-8) 200.8 2.0 10.0

Cobalt, Total (7440-48-4) 200.8 0.05 0.25

Iron, Total (7439-89-6) 200.7 12.5 50

Magnesium, Total (7439-95-4) 200.7 10 50

Molybdenum, Total (7439-98-7) 200.8 0.1 0.5

Manganese, Total (7439-96-5) 200.8 0.1 0.5

NWTPH Dx 4 Ecology NWTPH Dx 250 250

NWTPH Gx 5 Ecology NWTPH Gx 250 250

Tin, Total (7440-31-5) 200.8 0.3 1.5

Titanium, Total (7440-32-6) 200.8 0.5 2.5
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Permit No. WA0023451

PRIORITY POLLUTANTS

Pollutant & CAS No. 

(if available)

Recommended 

Analytical Protocol

Detection (DL)1 

μg/L unless specified

Quantitation Level 

(QL) 2μg/L unless 

specified

METALS, CYANIDE & TOTAL PHENOLS

Antimony, Total (7440-36-0) 200.8 0.3 1.0

Arsenic, Total (7440-38-2) 200.8 0.1 0.5

Beryllium, Total (7440-41-7) 200.8 0.1 0.5

Cadmium, Total (7440-43-9) 200.8 0.05 0.25

Chromium (hex) dissolved 

(18540-29-9)

SM3500-Cr EC 0.3 1.2

Chromium, Total (7440-47-3) 200.8 0.2 1.0

Copper, Total (7440-50-8) 200.8 0.4 2.0

Lead, Total (7439-92-1) 200.8 0.1 0.5

Mercury, Total (7439-97-6) 1631E 0.0002 0.0005

Nickel, Total (7440-02-0) 200.8 0.1 0.5

Selenium, Total (7782-49-2) 200.8 1.0 1.0

Silver, Total (7440-22-4) 200.8 0.04 0.2

Thallium, Total (7440-28-0) 200.8 0.09 0.36

Zinc, Total (7440-66-6) 200.8 0.5 2.5

Cyanide, Total (57-12-5) 335.4 5 10

Cyanide, Weak Acid Dissociable SM4500-CN I 5 10

Cyanide, Free Amenable to 

Chlorination (Available Cyanide)

SM4500-CN G 5 10

Phenols, Total EPA 420.1 50

Pollutant & CAS No. 

(if available)

Recommended 

Analytical Protocol

Detection (DL)1 

μg/L unless specified

Quantitation Level 

(QL) 2μg/L unless 

specified

ACID COMPOUNDS

2-Chlorophenol (95-57-8) 625 1.0 2.0

2,4-Dichlorophenol (120-83-2) 625 0.5 1.0

2,4-Dimethylphenol (105-67-9) 625 0.5 1.0

4,6-dinitro-o-cresol (534-52-1) 

(2-methyl-4,6,-dinitrophenol)

625/1625B 1.0 2.0

2,4 dinitrophenol (51-28-5) 625 1.0 2.0

2-Nitrophenol (88-75-5) 625 0.5 1.0

4-nitrophenol (100-02-7) 625 0.5 1.0

Parachlorometa cresol (59-50-7)

(4-chloro-3-methylphenol)

625 1.0 2.0

Pentachlorophenol (87-86-5) 625 0.5 1.0

Phenol (108-95-2) 625 2.0 4.0

2,4,6-Trichlorophenol (88-06-2) 625 2.0 4.0
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Permit No. WA0023451

PRIORITY POLLUTANTS (continued)

Pollutant & CAS No. 

(if available)

Recommended 

Analytical Protocol

Detection (DL)1 

μg/L unless specified

Quantitation Level 

(QL) 2μg/L unless 

specified

VOLATILE COMPOUNDS

Acrolein (107-02-8) 624 5 10

Acrylonitrile (107-13-1) 624 1.0 2.0

Benzene (71-43-2) 624 1.0 2.0

Bromoform (75-25-2) 624 1.0 2.0

Carbon tetrachloride (56-23-5) 624/601 or SM6230B 1.0 2.0

Chlorobenzene (108-90-7) 624 1.0 2.0

Chloroethane (75-00-3) 624/601 1.0 2.0

2-Chloroethylvinyl Ether 

(110-75-8)

624 1.0 2.0

Chloroform (67-66-3) 624 or SM6210B 1.0 2.0

Dibromochloromethane 

(124-48-1)

624 1.0 2.0

1,2-Dichlorobenzene (95-50-1) 624 1.9 7.6

1,3-Dichlorobenzene (541-73-1) 624 1.9 7.6

1,4-Dichlorobenzene (106-46-7) 624 4.4 17.6

Dichlorobromomethane (75-27-4) 624 1.0 2.0

1,1-Dichloroethane (75-34-3) 624 1.0 2.0

1,2-Dichloroethane (107-06-2) 624 1.0 2.0

1,1-Dichloroethylene (75-35-4) 624 1.0 2.0

1,2-Dichloropropane (78-87-5) 624 1.0 2.0

1,3-dichloropropene (mixed 

isomers) (1,2-dichloropropylene) (542-75-6) 

6

624 1.0 2.0

Ethylbenzene (100-41-4) 624 1.0 2.0

Methyl bromide (74-83-9) 

(Bromomethane)

624/601 5.0 10.0

Methyl chloride (74-87-3) 

(Chloromethane)

624 1.0 2.0

Methylene chloride (75-09-2) 624 5.0 10.0

1,1,2,2-Tetrachloroethane 

(79-34-5)

624 1.9 2.0

Tetrachloroethylene (127-18-4) 624 1.0 2.0

Toluene (108-88-3) 624 1.0 2.0

1,2-Trans-Dichloroethylene 

(156-60-5) (Ethylene dichloride)

624 1.0 2.0

1,1,1-Trichloroethane (71-55-6) 624 1.0 2.0

1,1,2-Trichloroethane (79-00-5) 624 1.0 2.0

Trichloroethylene (79-01-6) 624 1.0 2.0

Vinyl chloride (75-01-4) 624/SM6200B 1.0 2.0
Page 41 of 44

Permit No. WA0023451

PRIORITY POLLUTANTS (continued)

Pollutant & CAS No. 

(if available)

Recommended 

Analytical Protocol

Detection (DL)1 

μg/L unless specified

Quantitation Level 

(QL) 2μg/L unless 

specified

BASE/NEUTRAL COMPOUNDS (compounds in bold are Ecology PBTs)

Acenaphthene (83-32-9) 625 0.2 0.4

Acenaphthylene (208-96-8) 625 0.3 0.6

Anthracene (120-12-7) 625 0.3 0.6

Benzidine (92-87-5) 625 12 24

Benzyl butyl phthalate (85-68-7) 625 0.3 0.6

Benzo(a)anthracene (56-55-3) 625 0.3 0.6

Benzo(b)fluoranthene

(3,4-benzofluoranthene) (205-99-2) 7

610/625 0.8 1.6

Benzo(j)fluoranthene (205-82-3) 7625 0.5 1.0

Benzo(k)fluoranthene 

(11,12-benzofluoranthene) (207-08-9) 7

610/625 0.8 1.6

Benzo(r,s,t)pentaphene 

(189-55-9)

625 0.5 1.0

Benzo(a)pyrene (50-32-8) 610/625 0.5 1.0

Benzo(ghi)Perylene (191-24-2) 610/625 0.5 1.0

Bis(2-chloroethoxy)methane (111-

91-1)

625 5.3 21.2

Bis(2-chloroethyl)ether (111-44-4) 611/625 0.3 1.0

Bis(2-chloroisopropyl)ether (39638-

32-9)

625 0.3 0.6

Bis(2-ethylhexyl)phthalate 

(117-81-7)

625 0.1 0.5

4-Bromophenyl phenyl ether (101-

55-3)

625 0.2 0.4

2-Chloronaphthalene (91-58-7) 625 0.3 0.6

4-Chlorophenyl phenyl ether (7005-

72-3)

625 0.3 0.5

Chrysene (218-01-9) 610/625 0.3 0.6

Dibenzo (a,h)acridine (226-36-8) 610M/625M 2.5 10.0

Dibenzo (a,j)acridine (224-42-0) 610M/625M 2.5 10.0

Dibenzo(a-h)anthracene 

(53-70-3)(1,2,5,6-dibenzanthracene)

625 0.8 1.6

Dibenzo(a,e)pyrene (192-65-4) 610M/625M 2.5 10.0

Dibenzo(a,h)pyrene (189-64-0) 625M 2.5 10.0

3,3-Dichlorobenzidine (91-94-1) 605/625 0.5 1.0

Diethyl phthalate (84-66-2) 625 1.9 7.6

Dimethyl phthalate (131-11-3) 625 1.6 6.4

Di-n-butyl phthalate (84-74-2) 625 0.5 1.0

2,4-dinitrotoluene (121-14-2) 609/625 0.2 0.4

2,6-dinitrotoluene (606-20-2) 609/625 0.2 0.4
Page 42 of 44

Permit No. WA0023451

PRIORITY POLLUTANTS (continued)

Pollutant & CAS No. 

(if available)

Recommended 

Analytical Protocol

Detection (DL)1 

μg/L unless specified

Quantitation Level 

(QL) 2μg/L unless 

specified

BASE/NEUTRAL COMPOUNDS (compounds in bold are Ecology PBTs)

Di-n-octyl phthalate (117-84-0) 625 0.3 0.6

1,2-Diphenylhydrazine (as 

Azobenzene) (122-66-7)

1625B 5.0 20

Fluoranthene (206-44-0) 625 0.3 0.6

Fluorene (86-73-7) 625 0.3 0.6

Hexachlorobenzene (118-74-1) 612/625 0.3 0.6

Hexachlorobutadiene (87-68-3) 625 0.5 1.0

Hexachlorocyclopentadiene 

(77-47-4)

1625B/625 0.5 1.0

Hexachloroethane (67-72-1) 625 0.5 1.0

Indeno(1,2,3-cd)Pyrene

(193-39-5)

610/625 0.5 1.0

Isophorone (78-59-1) 625 0.5 1.0

3-Methyl cholanthrene (56-49-5) 625 2.0 8.0

Naphthalene (91-20-3) 625 0.3 0.6

Nitrobenzene (98-95-3) 625 0.5 1.0

N-Nitrosodimethylamine (62-75-9) 607/625 2.0 4.0

N-Nitrosodi-n-propylamine 

(621-64-7)

607/625 0.5 1.0

N-Nitrosodiphenylamine (86-30-6) 625 0.5 1.0

Perylene (198-55-0) 625 1.9 7.6

Phenanthrene (85-01-8) 625 0.3 0.6

Pyrene (129-00-0) 625 0.3 0.6

1,2,4-Trichlorobenzene

(120-82-1)

625 0.3 0.6

Pollutant & CAS No. 

(if available)

Recommended 

Analytical Protocol

Detection (DL)1 

μg/L unless specified

Quantitation Level 

(QL) 2μg/L unless 

specified

DIOXIN

2,3,7,8-Tetra-Chlorodibenzo-PDioxin (176-40-16) (2,3,7,8 TCDD)1613B 1.3 pg/L 5 pg/L
Page 43 of 44

Permit No. WA0023451

PRIORITY POLLUTANTS (continued)

Pollutant & CAS No. 

(if available)

Recommended 

Analytical Protocol

Detection (DL)1 

μg/L unless specified

Quantitation Level 

(QL) 2μg/L unless 

specified

PESTICIDES/PCBs

Aldrin (309-00-2) 608 0.025 0.05

alpha-BHC (319-84-6) 608 0.025 0.05

beta-BHC (319-85-7) 608 0.025 0.05

gamma-BHC (58-89-9) 608 0.025 0.05

delta-BHC (319-86-8) 608 0.025 0.05

Chlordane (57-74-9) 8

608 0.025 0.05

4,4’-DDT (50-29-3) 608 0.025 0.05

4,4’-DDE (72-55-9) 608 0.025 0.0510

4,4’ DDD (72-54-8) 608 0.025 0.05

Dieldrin (60-57-1) 608 0.025 0.05

alpha-Endosulfan (959-98-8) 608 0.025 0.05

beta-Endosulfan (33213-65-9) 608 0.025 0.05

Endosulfan Sulfate (1031-07-8) 608 0.025 0.05

Endrin (72-20-8) 608 0.025 0.05

Endrin Aldehyde (7421-93-4) 608 0.025 0.05

Heptachlor (76-44-8) 608 0.025 0.05

Heptachlor Epoxide (1024-57-3) 608 0.025 0.05

PCB-1242 (53469-21-9) 9

608 0.25 0.5

PCB-1254 (11097-69-1) 608 0.25 0.5

PCB-1221 (11104-28-2) 608 0.25 0.5

PCB-1232 (11141-16-5) 608 0.25 0.5

PCB-1248 (12672-29-6) 608 0.25 0.5

PCB-1260 (11096-82-5) 608 0.13 0.5

PCB-1016 (12674-11-2) 9

608 0.13 0.5

Toxaphene (8001-35-2) 608 0.24 0.5

1. Detection level (DL) or detection limit means the minimum concentration of an analyte (substance) 

that can be measured and reported with a 99% confidence that the analyte concentration is greater 

than zero as determined by the procedure given in 40 CFR part 136, Appendix B.

2. Quantitation Level (QL) also known as Minimum Level of Quantitation (ML) – The lowest level at 

which the entire analytical system must give a recognizable signal and acceptable calibration point 

for the analyte. It is equivalent to the concentration of the lowest calibration standard, assuming that 

the lab has used all method-specified sample weights, volumes, and cleanup procedures. The QL is 

calculated by multiplying the MDL by 3.18 and rounding the result to the number nearest to (1, 2, or 

5) x 10n, where n is an integer (64 FR 30417). 

ALSO GIVEN AS: 

The smallest detectable concentration of analyte greater than the Detection Limit (DL) where the 

accuracy (precision & bias) achieves the objectives of the intended purpose. (Report of the Federal 
Page 44 of 44

Permit No. WA0023451

Advisory Committee on Detection and Quantitation Approaches and Uses in Clean Water Act 

Programs Submitted to the US Environmental Protection Agency, December 2007).

3. Soluble Biochemical Oxygen Demand method note: First, filter the sample through a Millipore 

Nylon filter (or equivalent) - pore size of 0.45-0.50 um (prep all filters by filtering 250 ml of 

laboratory grade deionized water through the filter and discard). Then, analyze sample as per 

method 5210-B. 

4. NWTPH Dx - Northwest Total Petroleum Hydrocarbons Diesel Extended Range – see 

http://www.ecy.wa.gov/biblio/97602.html

5. NWTPH Gx - Northwest Total Petroleum Hydrocarbons Gasoline Extended Range – see 

http://www.ecy.wa.gov/biblio/97602.html

6. 1, 3-dichloroproylene (mixed isomers) You may report this parameter as two separate parameters: 

cis-1, 3-dichlorpropropene (10061-01-5) and trans-1, 3-dichloropropene (10061-02-6). 

7. Total Benzofluoranthenes - Because Benzo(b)fluoranthene, Benzo(j)fluoranthene and 

Benzo(k)fluoranthene co-elute you may report these three isomers as total benzofluoranthenes.

8. Chlordane – You may report alpha-chlordane (5103-71-9) and gamma-chlordane (5103-74-2) in 

place of chlordane (57-74-9). If you report alpha and gamma-chlordane, the DL/PQLs that apply are

0.025/0.050.

9. PCB 1016 & PCB 1242 – You may report these two PCB compounds as one parameter called PCB 

1016/1242.