Page 1 of 55 Permit No. WA0 0 29181



### Issuance Date: December 19, 2014
Effective Date: February 1, 2015 Expiration Date: January 31, 2020



## National Pollutant Discharge Elimination System Waste Discharge Permit No. WA 0 0 29181

State of Washington DEPARTMENT OF ECOLOGY Northwest Regional Office 3190 160 th 

### 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.

KING COUNTY WASTEWAT ER TREATMENT DIVISIO N

– WEST POINT WASTEWATE R

TREATMENT PLANT & COMBINED SEWER OVE RFLOW SYSTEM

King Street Center, KSC

- NR

- 0512 201 South Jackson Street Seattle, WA 98104

- 3855



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

Facility Name West Point

Wastewater Treatment Plant (serves combined sewer area) Alki Storage and CSO
Treatment Plant Carkeek Storage and CSO
Treatment Plant Denny/Elliott West Storage and CSO
Treatment Plant Henderson/MLK

Storage and CSO
Treatment Plant

Plant Address 1400 Di scovery Park

Blvd Seattle, WA 98199 3380 Beach Drive SW Seattle, WA 98116

- 2616 1201 NW Carkeek Park
R d

, Seattle, WA 98177

- 4640 545 Elliott Ave W Seattle, WA 98119 Outlet Regulator

9829 42 nd Ave S Seattle, WA 98118

Receiving
Water Puget Sound Puget Sound Puget Sound Elliott Bay Duwamish Waterway

Plant Type Secondary,

Activated Sludge, Chlorine Disinfection Satellite CSO Storage
and Treatment Plant Satellite CSO Storage
and Treatment Plant Satellite CSO Storage and
Treatment Plant Satellite CSO

Storage and
Treatment Plant

Discharge Location : Lat: 47. 661111  ̊

Long:

- 12 2

. 446389  ̊ Lat: 47.57025 ̊ Long:

- 12 2

. 4225  ̊ Lat: 47.71264 ̊ Long:

- 12 2

. 38789  ̊ Lat: 47.61755 ̊ Long:

- 12 2

. 36186  ̊ Lat: 47.51194 ̊

Long:

- 122

. 29736  ̊



### Kevin C. Fitzpatrick Water Quality Section Manager Northwest Regional Office Washington State Department of EcologyPage 2 of 55 Permit No. WA0 0 29181



## Table of Contents

Summary of Permit Report Submittals

................................ ................................ ......................... 4

Special Conditions

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

................................ ................................ ................................ .................... 5
S1.A. Effluent limits for Outfall 001

- West Point wastewater treatment plant

........................... 5
S1.B. Effluent limits for the CSO treatment plants

................................ ................................ ...... 6
S1.C. Mixing zone authorizations

................................ ................................ ................................ . 9 

### S2. Monitoring requirements

................................ ................................ ................................ .. 10
S2.A. Monitoring schedules

................................ ................................ ................................ ........ 10
S2.B. Sampling and analytical procedures

................................ ................................ ................. 14
S2.C. Flow measurement, field measurement, and continuous monitoring devices

.................. 14
S2.D. Laboratory accreditation

................................ ................................ ................................ ... 15 

### S3. Reporting and recording requirements

................................ ................................ ............ 15
S3.A. Reporting

................................ ................................ ................................ .......................... 15
S3.B. Permit submittals and schedules

................................ ................................ ....................... 16
S3.C. Records retention

................................ ................................ ................................ .............. 17
S3.D. Recording of results

................................ ................................ ................................ .......... 17
S3.E. Additional monitoring by the Permittee

................................ ................................ ........... 17
S3.F. Reporting permit violations

................................ ................................ .............................. 17
S3.G. Other reporting

................................ ................................ ................................ .................. 19
S3.H. Maintaining a copy of this permit

................................ ................................ ..................... 19 

### S4. Facility loading (West Point WWTP)

................................ ................................ ............... 19
S4.A. Design criteria

................................ ................................ ................................ ................... 19
S4.B. Plans for maintaining adequate capacity

................................ ................................ ........... 20
S4.C. Duty to mitigate

................................ ................................ ................................ ................ 20
S4.D. Notification of new or altered sources

................................ ................................ .............. 20
S4.E. Wasteload assessment

................................ ................................ ................................ ....... 21 

### S5. Operation and maintenance

................................ ................................ .............................. 21
S5 .A. Certified operator

................................ ................................ ................................ .............. 21
S5.B. Operation and maintenance program

................................ ................................ ................ 22
S5.C. Short

- term reduction

................................ ................................ ................................ ......... 22
S5.D. Electrical power failure

................................ ................................ ................................ ..... 22
S5.E. Prevent connection of inflow

................................ ................................ ............................ 22
S5.F. Bypass procedures

................................ ................................ ................................ ............ 23
S5.G. Op erations and maintenance (O&M) manual

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

### S6. Pretreatment

................................ ................................ ................................ ....................... 25
S6.A. General requirements

................................ ................................ ................................ ........ 25
S6.B. Monitoring requirements

................................ ................................ ................................ .. 29
S6.C. Reporting of monitoring results

................................ ................................ ........................ 30
S6.D. Local limit development

................................ ................................ ................................ ... 30 

### S7. Solid wastes

................................ ................................ ................................ ......................... 30
S7.A. Solid waste handling

................................ ................................ ................................ ......... 30
S7.B. Leachate

................................ ................................ ................................ ............................ 30 

### S8. Acute toxicity

................................ ................................ ................................ ...................... 31
S8.A. Acute testing

................................ ................................ ................................ ..................... 31
S8.B. Sampling and reporting requirements

................................ ................................ ............... 31 

### S9. Chronic toxicity

................................ ................................ ................................ .................. 32
S9.A. Chronic testing

................................ ................................ ................................ .................. 32
S9.B. Sampling and reporting requirements

................................ ................................ ............... 32Page 3 of 55 Permit No. WA0 0 29181



### S10. Wet weather operation

................................ ................................ ................................ ....... 33
S11. Combined sewer overflows

................................ ................................ ................................ 34
S1 1.A. Authorized CSO discharge locations

................................ ................................ ................ 34
S11.B. Nine minimum controls

................................ ................................ ................................ .... 35
S11.C. Combined sewer overflow reporting

................................ ................................ ................ 37
S11.D. Combined sewer overflow reduction plan amendment

................................ ..................... 38
S11.E. Engineering reports and plans and specifications for CSO reduction projects

................. 38
S11.F. Requirements for controlled combined sewer overflows

................................ ................. 38 

### S12. Spill control plan

................................ ................................ ................................ .................. 40
S13. Sed iment monitoring

................................ ................................ ................................ ........... 40
S13.A. Sediment sampling

– West Point WWTP

................................ ................................ ......... 40
S13.B. Sediment sampling

– CSO outfalls

................................ ................................ ................... 41
S13.C. Sediment quality summary at CSO outfalls

................................ ................................ ...... 42 

### S14. Outfall evaluation

................................ ................................ ................................ ............... 43
S15. Elliott West CSO treatment plant

– copper reduction assessment

................................ 43
S16. Elliott West CSO treatment plant

– settleable solids removal assessment

................... 43
S17. Application for permit renewal or facility modifications

................................ ............... 44

General Conditions

................................ ................................ ................................ ...................... 45
G1. Signatory requirements

................................ ................................ ................................ ..... 45
G2. Right of inspection and entry

................................ ................................ ............................ 46
G3. Permit actions

................................ ................................ ................................ ..................... 46
G4. Reporting planned changes

................................ ................................ ............................... 47
G5

. Plan review required

................................ ................................ ................................ .......... 48
G6. Compliance with other laws and statutes

................................ ................................ ......... 48
G7. Transfer of this permit

................................ ................................ ................................ ....... 48
G8. Reduced production for compliance

................................ ................................ ................. 49
G9. Removed substances

................................ ................................ ................................ ........... 49
G10. Duty to provide information

................................ ................................ .............................. 49
G11. Other requirements of 40 CFR

................................ ................................ ......................... 49
G12. Additional monitoring

................................ ................................ ................................ ........ 49
G13. Payment of fees

................................ ................................ ................................ ................... 49
G14. Penalties for violating permit conditions

................................ ................................ ......... 49
G15. Upset

................................ ................................ ................................ ................................ .... 50
G16. Property rights

................................ ................................ ................................ .................... 50
G17. Duty to comply

................................ ................................ ................................ .................... 50
G18. Toxic pollutants

................................ ................................ ................................ .................. 50
G19. Penal ties for tampering

................................ ................................ ................................ ...... 50
G20. Compliance schedules

................................ ................................ ................................ ........ 51
G21. Service agreement review

................................ ................................ ................................ .. 51

Ap pendix A

................................ ................................ ................................ ................................ ... 52

Tab le 1

. Dilution zone sizes and dilution factors for permitted outfalls

...................................................... 9
Table 2

. Monitoring Sc hedule

– West Point WWTP (001)

.................................................................... 10
Table 3

. Monitoring Schedule for all CSO TPs: Alki

- 051, Carkeek

- 046, Elliott West

- 027, Henderson/MLK

- 044

... 12
Table 4

. Monitoring Schedule

– Untreated CSO Outfalls

..................................................................... 14
Table 5

. Permitted CSO outfalls (38)

............................................................................................ 34
Table 6

. Controlled CSO outfalls (16)

........................................................................................... 39Page 4 of 55 Permit No. WA0 0 29181



## Summary of Permit Report Submittals

Section Submittal Frequency First Submittal Date

S3.A Discharge Monitoring Report Monthly Annually March 15, 2015

July 31 , 2015

S3. F Reporting Permit Violations As necessary

S4.B Plans for Maintaining Adequate Capacity As necessary

S4.D Notification of New or Altered Sources As necessary

S4.E Wasteload Assessment 1/ permit cycle With permit application

S5.F Bypass Notification As necessary

S5.G Operations and Maintenance Update As necessary

S6.A Pretreatment Report 1/year March 31, 2015

S 8 Acute Toxicity Effluent Tests

(testing in 1 st and 3 rd quarters of 2017) 2 tests/ permit cycle,
1 submittal /permit cycle W ith permit application

S 9 Chronic Toxicity Effluent Test s

(testing in 2 nd and 4 th quarters of 2017) 2 tests/permit cycle,
1 submittal /permit cycle With permit application

S10 Wet Weather Operation Reports As necessary with monthly DMR submittal

S 11.C CSO Monthly Report Monthly with monthly DMR submittal

S 1 1 .C CSO Annual Report Annually July 31, 201 5

S 11 .D CSO Reduction Plan Amendment 1/permit cycle With permit application

S 11.F.d CSO Post Construction Monitoring Data Report 1/permit cycle December 1, 201 9

S12 Spill Control Plan Update As necessary

S 1 3.A Sediment Sampling & Analysis Plan

- West Pt

Sediment Data Report

- West Pt 1/permit cycle December 1, 2016
December 1, 2018

S 1 3.B Sediment Sampling & Analysis Plan

- CSO Outfalls

Sediment Data Report

- CSO Outfalls 1/permit cycle December 1, 2016
December 1, 2018

S13.C Sediment Quality at CSO Outfalls Summary Report 1/permit cycle December 1, 2018

S 14 Outfall Evaluation Reports

– West Point and CSO TPs 1/permit cycle With permit application

S1 5 Elliott West Copper Reduction Assessment 1/permit cycle November 1, 2018

S1 6 Elliott West S ettleable S olids Removal A ssessment 1/permit cycle November 1, 2018

S1 7 Application for Permit Renewal 1/permit cycle January 31, 2019

G1 Notice of Change in Authorization As necessary

G4 Reporting Planned Changes As necessary

G5 Engineering Report for Construction or Modification

Activities As necessary

G13 Payment of Fees As assessedPage 5 of 55 Permit No. WA0 0 29181



## Special Conditions

S1. Discharge 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.

S1. A. Effluent limits for Outfall 001

- West Point w astewater t reatment p lant

Beginning on the effective date of this permit and lasting through the expiration date, the Permittee may discharge treated municipal wastewater at the permitted locations subject to compliance with the following limits:

Effluent Limits : Outfall # 001

- West Point WWTP

Latitude : 47.661111  ̊ Longitude :

- 122.446389  ̊

Parameter Average Monthly a Average Weekly b

Carbonaceous Biochemical Oxygen Demand (5

- day) 25 milligrams/liter (mg/L) 44,800 pounds/day ( lbs/day ) May

– Oct: 85% removal of influent CBOD 5 Nov

– April: 80% removal of influent CBOD 5 40 mg/L
71,700 lbs/day

Total Suspended Solids 30 mg/L, 53,800 lbs/day May

– Oct: 85% removal of influent TSS

Nov

– April: 80% removal of influent TSS 45 mg/ L
80,700 lbs/day

Monthly Geometric Mean Weekly Geometric Mean

Fecal Coliform Bacteria c 200/100 mL 400/100 mL

Instantaneous Minimum Instantaneous Maximum

pH d 6.0 9.0

Average Monthly a Maximum Daily e

Total Residual Chlorine 139 μg/L 364 μg/L

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

, calculated as the sum of all daily discharges measured during a calendar month divided by the number of daily discharges measured during that month

. b Average weekly discharge limit means the highest allowable average of daily discharges over a calendar week, calculated as the sum of all daily discharges measured during a calendar week divided by the number of daily discharges measured during that week

.

c Ecology provides directions to calculate this value in publication No. 04

- 10

- 020, Information Manual for Treatment Plant Operators, available at : http://www.ecy.wa.gov/pubs/0410020.pdf

. d R eport the instantaneous maximum and minimum pH monthly

. Do not average pH values.

e Maximum da ily effluent limit means the highest allowable daily discharge. The daily discharge is the average measurement of the pollutant over the day.Page 6 of 55 Permit No. WA0 0 29181



### S1. B. Effluent l

imits for the CSO treatment p lants

Beginning on the effective date of this permit and lasting through the expiration date, the Permittee may discharge treated combined sewer overflows at the following permitted location s subject to compliance with the following limits

. Discharges from the s e outfall s are pro hibited except as a result of precipitation

event s

.

Effluent Limits: Outfall #051

- Alki CSO TP

Latitude: 47.5702 5  ̊ Longitude:

- 122. 4225  ̊

Parameter Average Monthly Annual Average a

Total Suspended Solids Removal Efficiency b Report Equal to or greater than 50% removal of influent TSS

Monthly Geometric Mean

Fecal Coliform Bacteria 400/100 mL c

Annual Average a

Settleable Solids 0.3 mL/L/hr

Instantaneous Minimum Instantaneous Maximum

pH d 6.0 9.0

Maximum Daily e

Total Residual Chlorine 234 μg/L

Long

- Term Average f

Number of Discharge Events 29 events/year

Discharge Volume 108 million gallons/ year

a Calculate annual averages as the average of all ‘event’ averages. Do not omit one event per year from calculation. Data must be collected and reported on a calendar year basis via WQWebDMR and in the Annual CSO Report.

b Calculate t he TSS total removal efficiency on a mass balance basis as the percent of solids captured at the CSO treatment f acility and then permanently removed at the West Point WWTP . The reported daily average TSS % removal efficiency at the West Point WWTP, corresponding to the event, must be used for calculating the total removal efficiency f or the CSO f acility. Note: While % TSS removal is reported on a monthly basis, compliance is
based on the annual average as reported via WQWebDMR and in the annu al CSO report as required in S11

.

c For the monthly geometric mean, calculate the geometric me an of all samples collected during the month ; use a value of 1 for the geomean calc when fecal coliform results are 0

. Do not include non

- discharge days in the calculation. Ecology provides directions to calculate this value in publication No. 04

- 10

- 020, I nformation Manual for Treatment Plant Operators, available at: http://www.ecy.wa.gov/pubs/0410020.pdf

. d Re port the instantaneous maximum and minimum pH monthly

. Do not average pH values.

e Maximum daily effluent limit means the highest allowable daily discharge. The daily discharge is the average measurement of the pollutant measured over a calendar day while discharging

. f Long

- term average will be assessed using data collected over the fu ll permit cycle

. Data must be collected and reported for the period of the permit cycle prior to permit renewal , as required in S4.E.Page 7 of 55 Permit No. WA0 0 29181

Effluent Limits: Outfall #046

- Carkeek CSO TP

Latitude: 47.7126 4  ̊ Longitude:

- 122.387 8 9 ̊

Parameter Average Monthly Annual Average a

Total Suspended Solids Removal Efficiency b Report Equal to or greater than 50% removal of influent TSS

Monthly Geometric Mean

Fecal Coliform Bacteria c 400/100 mL

Annual Average a

Settleable Solids 0.3 mL/L/hr

Instantaneous Minimum Instantaneous Maximum

pH d 6.0 9.0

Maximum Daily e

Total Residual Chlorine 490 μg/L

Long

- Term Average f

Number of Discharge Events 10 events/year

Discharge Volume 46 million gallons/year

a Calculate annual averages as the average of all ‘event’ averages. Do not omit one event per year from calculation. Data must be collected and reported on a calendar year basis via WQWebDMR and in the Annual CSO Report.

b Calculate the TSS total removal efficiency on a mass balance basis as the percent of solids captured at the CSO treatment facility and then permanently removed at the West Point WWTP. The reported daily average TSS % removal efficiency at the West Point WW TP, corresponding to the event, must be used for calculating the total removal efficiency for the CSO facility. Note: While % TSS removal is reported on a monthly basis, compliance is based on the annual average as reported via WQWebDMR and in the annual C SO report as required in S11.

c For the monthly geometric mean, calculate the geometric mean of all samples collected during the month; use a value of 1 for the geomean calc when fecal coliform results are 0. Do not include non

- discharge days in the calcu lation. Ecology provides directions to calculate this value in publication No. 04

- 10

- 020, Information Manual for Treatment Plant Operators, available at: http://www.ecy.wa.gov/pubs/0410020.pdf

. d Report the instantaneous maximum and minimum pH monthly

. Do not average pH values.

e Maximum daily effluent limit means the highest allowable daily discharge. The daily discharge is the average measurement of the pollutant measured over a calendar day while dis charging.

f Long

- term average will be assessed using data collected over the full permit cycle. Data must be collected and reported for the period of the permit cycle prior to permit renewal , as required in S4.E.Page 8 of 55 Permit No. WA0 0 29181

Effluent Limits: Outfall #027B

- Elliott West CSO TP
Latitude: 47.61755 ̊ Longitude:

- 122.361856 ̊

Parameter Average Monthly Annual Average a

Total Suspended Solids Removal Efficiency b Report Equal to or greater than 50% removal of influent TSS

Monthly Geometric Mean

Fecal Coliform Bacteria c 400/100 mL

Annual Average a

Settleable Solids 0.3 mL/L/hr

Instantaneous Minimum Instantaneous Maximum

pH d 6.0 9.0

Maximum Daily e

Total Residual Chlorine 109 μg/L

a Calculate annual averages as the average of all ‘event’ averages. Do not omit one event per year from calculation. Data must be collected and reported on a calendar year basis via WQWebDMR and in the Annual CSO Report.

b Calculate the TSS total removal efficiency on a mass balance basis as the percent of soli ds captured at the CSO treatment facility and then permanently removed at the West Point WWTP. The reported daily average TSS % removal efficiency at the West Point WWTP, corresponding to the event, must be used for calculating the total removal efficiency for the CSO facility. Note: While % TSS removal is reported on a monthly basis, compliance is based on the annual average as reported via WQWebDMR and in the annual CSO report as required in S11.

c For the monthly geometric mean, calculate the geometric mean of all samples collected during the month; use a value of 1 for the geomean calc when fecal coliform results are 0. Do not include non

- discharge days in the calculation. Ecology provides directio ns to calculate this value in publication No. 04

- 10

- 020, Information Manual for Treatment Plant Operators, available at: http://www.ecy.wa.gov/pubs/0410020.pdf

. d Report the instantaneous maximum and minimum pH monthly

. Do not average pH values.

e Maximum daily effluent limit means the highest allowable daily discharge. The daily discharge is the average measurement of the pollutant measured over a calendar day while discharging.Page 9 of 55 Permit No. WA0 0 29181

Effluent Limits: Outfall #044

- Henderson/MLK CSO TP

Latitude: 47.5119 4  ̊ Longitude:

- 122.29736 ̊

Parameter Average Monthly Annual Average a
Total Suspended Solids Removal Efficiency b Report Equal to or greater than 50% removal of influent TSS

Monthly Geometric Mean

Fecal Coliform Bacteria c 400/100 mL

Annual Average a

Settleable Solids 0.3 mL/L/hr

Instantaneous Minimum Instantaneous Maximum
pH d 6.0 9.0

Maximum Daily e

Total Residual Chlorine 39 μg/L

a Calculate annual averages as the average of all ‘event’ averages. Do not omit one event per year from calculation. Data must be collected and reported on a calendar year basis via WQWebDMR and in the Annual CSO Report.

b Calculate the TSS total removal efficiency on a mass balance basis as the percent of solids captured at the CSO treatment facility and then permanently removed at the West Point WWTP. The reported daily average TSS % removal efficiency at the West Point WW TP, corresponding to the event, must be used for calculating the total removal efficiency for the CSO facility. Note: While % TSS removal is reported on a monthly basis, compliance is based on the annual average as reported via WQWebDMR and in the annual C SO report as required in S11.

c For the monthly geometric mean, calculate the geometric mean of all samples collected during the month; use a value of 1 for the geomean calc when fecal coliform results are 0. Do not include non

- discharge days in the calcu lation. Ecology provides directions to calculate this value in publication No. 04

- 10

- 020, Information Manual for Treatment Plant Operators, available at: http://www.ecy.wa.gov/pubs/0410020.pdf

. d Report the instantaneous maximum and minimum pH monthly

. Do not average pH values.

e Maximum daily effluent limit means the highest allowable daily discharge. The daily discharge is the average measurement of the pollutant measured over a calendar day while dis charging.



### S1. C

. Mixing z one a uthorization s

Tab le 1 summarizes the mixing boundaries and dilution factors for the West Point WWTP and CSO treatment plant outfalls.

Tab le 1

. Dilution zone sizes and dilution factors for permitted outfalls

Outfall Mixing Zone Radius (feet) a Dilution Factors

Chronic Acute Aquatic Life Chronic Aquatic

Life Acute Human Health:

Carcinogen Human Health:

Non

- Carcinogen

West Point WWTP 430 43 188 28 324 324

Alki CSO b 343 34 99 20

Carkeek CSO b 395 39.5 104 75

Elliott West CSO b 260 26 9 .7 8 .4

Henderson/MLK CSO b 312 c 31.2 c 10.3 1.9

a As measured from each port.

b Mixing zone dilution modeling is more accurate for continuous discharges. The resultant dilution factor that is achieved in the mixing zone of an intermittent discharge such as this is an approximation that is based on reasonable assumptions about the flow characteristics of the discharge and conditions of the receiving water.

c Since this is a river discharge, these dimensions represent distance downstream of outfall instead of radius.Page 10 of 55 Permit No. WA0 0 29181



### S2. Monitoring requirements

S2. A. Monitoring schedule s

The Permittee must monitor in accordance with the schedule s in the following
tables and the requirements specified in Appendix A or any corresponding Sampling Analysis Plan/Quality Assurance Project Plan (SAP/QAPP) documents.
Alternative methods from 40 CFR Part 136 ar e acceptable only for those parameters without limits and if the DL and QL are equivalent to those specified in Appendix A, any corresponding SAP/QAPP documents, or sufficient to produce a measurable quantity.

Table 2 . Monitoring Sc hedule

– West Point WWTP (001)

Parameter Units Minimum Frequency Sample Type

(1) Wastewater Influent a

BOD 5 mg/L 1/week 24

- hr Composite b
lbs/day c 1/week Calculation

CBOD 5 mg/L 1/day 24

- hr Composite lbs/day c 1/day Calculation

TSS mg/L 1/day 24

- hr Composite lbs/day 1/day Calculation (2) Final Wastewater Effluent d

Flow MGD Continuous e Meter

CBOD 5 f mg/L 1/day 24

- hr Composite lbs/day c 1/day Calculation

% removal g 1/month Calculation

TSS mg/L 1/day 24

- hr Composite lbs/day c 1/day Calculation

% removal g 1/month Calculation Chlorine (after dechlorination) μg/L Continuous e Meter

Fecal Coliform # /100 ml 1/day Grab h

pH Standard Units Continuous e Meter (3) Effluent Characterization

– Final Wastewater Effluent

Total Ammonia mg/L N 1/month 24

- hr Composite lbs/day 1/month Calculation

Nitrate + Nitrite Nitrogen mg/L N 1/month 24

- hr Composite Total Kjeldahl Nitrogen mg/L N 1/month 24

- hr Composite Total Phosphorus mg/L P 1/month 24

- hr Composite Soluble Reactive Phosphorus mg/L P 1/month 24

- hr Composite ( 4) Whole Effluent Toxicity Testing

– Final Wastewater Effluent

- As specified in Permit Conditions S8 & S9. Acute Toxicity Testing 2/permit cycle 24

- hr Composite Chronic Toxicity Testing 2/permit cycle 24

- hr Composite (5) Pretreatment

- As specified in Permit Condition S6. ( 6 ) CSO Monitoring

- As specified in Permit Condition S11. ( 7 ) Permit Application Requirements

– Final Wastewater Effluent j
Dissolved Oxygen mg/L 1/year in Aug Grab Oil and Grease (HEM) mg/L 1/year in Aug Grab

Total Dissolved Solids mg/L 1/year in Aug 24

- hr Composite

Total Hardness mg/L 1/year in Aug 24

- hr Composite Alkalinity mg/L as CaCO3 1/year in Aug GrabPage 11 of 55 Permit No. WA0 0 29181

Table 2 . Monitoring Sc hedule

– West Point WWTP (001)

Parameter Units Minimum Frequency Sample Type

Temperature  ̊ C 1/year in Aug Grab

Cyanide μg/L 2/year i, j Grab Total Phenolic Compounds μg/L 2/year i, j Grab Priority Pollutants (PP)

– Total Metals μg/L (ng for mercury) 2/year i, j 24

- hr Composite; Grab for

mercury
PP

– Volatile Organic Compounds μg/L 2/year i, j Grab

PP

– Acid

- extractable Compounds μg/L 2/year i, j 24

- hr Composite

PP

– Base

- neutral Compounds μg/L 2/year i, j 24

- hr Composite (8) Sediment Study

- As specified in Permit Condition S13. A.

a Wastewater Influent means the raw sewage flow from the collection system into the treatment facility. Sample the wastewater entering the headworks of the plant excluding any side

- stream returns from inside the plant.

b 24

- hour composite means a series o f individual samples collected over a 24

- hour period in a single container and analyzed as one sample.

c lbs/day = Concentration (in mg/L) x Flow (in MGD) x Conversion Factor (8.34) = lbs/day . Calculate using the average flow measured during the sample collection period.

d Final Wastewater Effluent means wastewater which is exiting, or has exited, the last treatment process or operation.

e “ Continuous” means uninterrupted except for brief lengths of time for calibration, power failure, or unantici pated equipment repair or maintenance. The Permittee must sample every six hour s when continuous monitoring is not possible.

f Effluent samples for CBOD 5 analysis may be taken before or after the disinfection process. If taken after, dechlorinate
and r eseed the sample.

g % removal = Influent monthly average concentration (mg/L)

– Effluent monthly average concentration (mg/L) x 100 Influent monthly average concentration (mg/L)

h “Grab” means an individual sample collected over a 15

- minute, or less, period.

i One of the two annual sampling events must occur when flows are being diverted around the secondary process (i.e. instantaneous effluent flow rate is greater than 300 MGD) or when the average daily precipitation is equal to or greater than 0.25 inches

. j The Permittee must record and report the wastewater treatment plant flow discharged on the day it collects the sample for Appendix A pollutant testing with the discharge monitoring report. See Appendix A or corresponding SAP/QAPP fo r the required detection (DL) or quantitation (QL) levels. Report single analytical values below detection as “less than (detection level)” where (detection level) is the numeric value specified in Appendix A.
Report single analytical values between the detection and quantitation levels with qualifier code of ‘ j ’ following the value. If unable t o obtain the required DL and QL due to matrix effects, the Permittee must submit a matrix specific MDL and a QL with appropriate laboratory documentation

.Page 12 of 55 Permit No. WA0 0 29181

Table 3 . Monitoring Schedule for all CSO TPs: Alki

- 051, Carkeek

- 046, Elliott West

- 027, Henderson/MLK

- 044

Parameter Units Minimum Frequency Sample Type

(1) Influent a

Volume MG Per Event b Meter /Calculation c

BOD 5 mg/L Per Event Flow Proportional Composite d

TSS mg/L Per Event Flow Proportional Composite (2) Final Effluent e

Volume MG Per Event Meter /Calculation

BOD 5 mg/L Per Event Flow Proportional Composite

TSS mg/L Per Event Flow Proportional Composite

% removal f 1/month Calculatio n
Settleable Solids mL/L/hr Per Event Flow Proportional Composite

Total Residual Chlorine ug/L Continuous during
events g Mete r

Fecal Coliform # /100 ml Per Event Grab h, i

pH Std Units Continuous d uring
events Meter

Copper , total recoverable j μg/L Elliott West and Henderson/MLK:
Per Event All others: 1/year Flow Proportional Composite

Cyanide μg/L Elliott West: 4/yr Grab Dissolved Oxygen mg/L Elliott West :
Per Event starting in Nov 2016 All others: 1/year Meter or Grab

Discharge Duration Hours Per Event Meter /Calculation

Storm Duration k Hours Per Event Meter /Calculation
Precipitation Inches Per Event Meter /Calculation (3) Effluent Characterization

– Final Effluent

Total Ammonia mg/L N Henderson/MLK:
1 st 4 d ischarge

e vents

, then 1/year

All others: 1/year Flow Proportional Composite

Nitrate

- Nitrite Nitrogen mg/L N Flow Proportional Composite
Total Kjeldahl Nitrogen mg/L N Flow Proportional Composite
Total Phosphorus mg/L P Flow Proportional Composite Soluble Reactive Phosphorus mg/L P Flow Proportional Composite
Total Alkalinity mg CaCO 3 /L Flow Proportional Composite or Grab
Temperature  C Grab
Priority Pollutants (PP)

– Total Metals μg/L Flow Proportional Composite ; Grab for

mercury

PP

– Volatile Organic Compounds μg/L Grab

PP

– Acid

- extractable Compounds μg/L Flow Proportional Composite

PP

– Base

- neutral Compounds μg/L Flow Proportional Composite Cyanide μg/L Grab

Total Phenols μg/L Grab

PP

– Total PCBs l μg/L Henderson/MLK only: 1/year Flow Proportional Composite

(4) Permit Application Requirements

– Final Effluent m

Oil and Grease mg/L 1/year Grab

Total Dissolved Solids mg/L 1/year Flow Proportional CompositePage 13 of 55 Permit No. WA0 0 29181

Table 3 . Monitoring Schedule for all CSO TPs: Alki

- 051, Carkeek

- 046, Elliott West

- 027, Henderson/MLK

- 044

Parameter Units Minimum Frequency Sample Type

Total Hardness mg/L 1/year Flow Proportional Composite

a Influent means the combined raw sewage and stormwater flow s from the collection system into the treatment facility. Sample the wastewater entering the treatment plant.

b “Per Event” means a unique flow event as defined in the Permit Writer’s Manual , p. V

- 30. Ecology defines the
minimum inter

- even t period as 24 hours. A CSO event is considered to have ended only after at least 24 hours has elapsed since the last measured occurrence of an overflow.

c “ Meter /Calculation” means the total volume of the discharge or amount of precipitation event as estimated by direct measurement or indirectly by calculation (i.e. flow weirs, pressure transducers, tipping bucket). Precipitation must be measured by the nearest precipitation

- measuring device as owned and op erated by King County and actively monitored during the period of interest.

d “Flow proportional composite” means a series of individual samples c ollected over a flow period in a single container, and analyzed as one sample. The composite sample should re present the entire discharge event.

e “ Final Effluent ” means treated CSO effluent which is discharged to the receiving water, sampled after the dechlorination process. The Permittee may take effluent samples for the BOD 5 analysis before or after the disinfection process. If taken after, dechlorinate and reseed the sample.

f The total removal efficiency for TSS is to be calculated on a mass balance basis as the percent of solids captured at the CSO Treatment Plant and th en permanently removed at the West Point Treatment Plant based on the estimated removal efficiency at West Point.

g “Continuous” means uninterrupted except for brief lengths of time for calibration, power failure, or unanticipated equipment repair or maintenance. The Permittee must sample every hour when continuous monitoring is not possible.

h “Grab” means an individual sample collected over a 15

- minute, or less, period.

i Fecal grab samples must be taken at specific time intervals after the dischar ge begins to the receiving water as follows:
1. 1 sample within first 3 hours

. 2. 1 sample between 3

- 8 hours

. 3. 1 sample between 20

- 24 hours

. 4. If discharge extend s beyond 24 hours, at a minimum take 1 sample each day until the discharge ends.
I f more than 1 sample is collected within the time intervals listed above, report the average of the fecal values for that time interval. Report one fecal value for each interval ( as appropriate for the discharge duration ) and calculate the monthly geomean using all of the reported fecal values for the month. C hlorine and pH analyzer reading s must be logged when fecal coliform samples are taken. Each individual fecal coliform sample should be dechlorinated.

j Copper sampling must be performed with laboratory

- verified sampling procedures.

k Storm duration is the total amount of time precipitation occurred that contributed to a discharge event ; i t is determined

on a case

- by

- case basis.

l PCB monitoring only required for the Henderson/MLK CSO treatment plant. Total PCB s must be analyzed using method 1668 with a detection limit of 0.0001 μg/L or lower.

m The Permittee must r ecord and report the wastewater treatment plant flow discharged on the day it collects the sample for Appendix A pollutant testing with the discharge monitoring report. See Appendix A or corresponding SAP/QAPP for the required detection (DL) or quantitation (QL) levels.
Report single analytical values below detection as “less than [ detection level ]” where [ detection level ] is the numeric value specified in Appendix A. Report single analytical values between the detection and quantitation levels with qualifier code of ‘j’ following the
value.Page 14 of 55 Permit No. WA0 0 29181



### Untreated CSO Outfalls

The Permittee must monitor all discharges from the CSO outfalls listed in Special
Condition S11

, not including any CSO treatment plants

, using the following monitoring
schedule

. The Permittee must use automatic flow monitoring equipment to collect the information required below , and must calibrate flow monitoring equipment according to requirements in Condition S2. C

. A CSO discharge is defined as any untreated CSO
which will exit or has exited the CSO outfall.

Table 4 . Monitoring Schedule

– Untreated CSO Outfalls

Parameter Units Minimum Sampling Frequency Sample Type

Volume Discharged MG Per Event a Meter /Calculation b

Discharge Duration Hours Per Event Meter /Calculation

Storm Duration c Hours Per Event Meter /Calculation

Precipitation Inches Per Event Meter /Calculation

Sediments

– As specified in Permit Condition S 13. C.

a “Per Event” means a unique flow event as defined in the Permit Writer’s Manual , p. V

- 30. Ecology defines
the minimum inter

- event period as 24 hours. A CSO event is considered to have ended only after at least 24 hours has elapsed since the last measured occurrence of an overflow.

b “ Meter /Calculation” means the total volume of the discharge or amount of precipitation event as estimated by direct measurement or indirectly by calculation (i.e. flow weirs, pressure transducers, tipping bucket)

. Precipitation must be measured by the nearest possible precipitation

- measuring device and actively monitored du ring the period of interest.

c Storm duration is the total amount of time precipitation occurred that contributed to a discharge event ; i t is determined on a case

- by

- case basis.



### 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 c onditions 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 paramete rs without an EPA approved test method in 40 CFR Part 136

. S2. C. F low 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.Page 15 of 55 Permit No. WA0 0 29181



### 2. Install 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. Calib rate continuous monitoring instruments consistent with the manufacturer’s recommendation

. 4. Maintain calibration records for at least three years.

S2. D. Laboratory accreditation

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

, and internal process control parameters are exempt fr om this requirement.

.

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 provid ed by Ecology within the Water Quality Permitting Portal

. Include
data fo r each of the parameters tabulated in Special Condition S2 and as required by the form

. Report a value for each day sampling occurred (unless specifically exempted in the permit) and for the summary values (when applicable) included on the electronic form

. To find out more information and to sign up for the Water Quality Permitting Portal go to: http://www.ecy.w a.gov/programs/wq/permits/paris/webdmr.html

. 2. E nter 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 minim um DL
and quantitation level ( QL ) identified in the permit, report the actual QL and
DL in the comment s 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

.Page 16 of 55 Permit No. WA0 0 29181



### 5. Calculate average values and calculated total values (unless otherwise specified in the permit) using:

a. T he reported numeric value for all parameters measured between the

agency

- required detection value and the agency

- required quantitation
value.

b. O ne

- half the detection value (f or values reported below detection ) if the lab detected the parameter in another s ample for the reporting period.

c. Z ero (f

or values reported below detection ) if the lab did not detect the parameter in another sample for the reporting period

.
6. Report priority pollutant data on the WQWebDMR form and i nclude sampl e date, concentration detect ed, detection limit (DL) (as necessary) , laboratory quantitation level (QL) (as necessary) , and CAS number . The Permittee must
also submit a n electronic PDF copy of the laboratory report as an attachment using WQWebDMR. The laboratory report must provide t he 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 laboratory report mu st also include information on the chain of custody, QA/QC results, and documentation of accreditation for the parameter.

7. Submit DMRs for parameters with the monitoring frequencies specified in S2 (monthly, quarterly, annual, etc.) at the reporting schedul e identified below

. The Permittee must:

a. Submit monthly DMRs by the 15 th 

### day of the following month

. b. Submit annual DMRs by July 31 th 

### for the previous calendar year. The annual samplin g period is the calendar year.

S3.B. Permit submittals and schedules

The Permittee must use the Water Quality Permitting Portal

– Permit Submittals application to submit all other written permit

- required reports by the date specified in the permit.

When another permit condition requires submittal of a report/file that cann ot be accepted by the Water Quality Permitting Portal (i.e. video file for outfall inspection), the Permittee must ensure that the report/file is postmarked or received by Ecology no later than the dates specified by this permit. Send these reports/files t o Ecology at:

Water Quality Permit Coordinator Department of Ecology Northwest Regional Office
3190 160 th 

### Avenue SE Bellevue, WA 98008

- 5452Page 17 of 55 Permit No. WA0 0 29181



### S3. C

. 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. D

. Recording of results

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

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

. 2. The individual who perfor med the sampling or measurement

. 3. The da tes the analyses were performed

. 4. The individual who performed the analyses

. 5. The analyt ical techniques or methods used and the relevant detection limits

.
6. The results of all analyses

. S3. E

. A dditional monitoring by the P ermittee

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 or annual CSO report, as appropriate. If the Permittee monitors
sediment or untreated CSO discharges more frequently than required by this permit

, then the Permittee must enter the results of such monitoring into Ecology’s EIM database or include the results in the annual CSO report, as appropriate.

S3. F

. Reporting permit violations

The Per mittee 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 non

- compliance and correct the problem.

2. If applic able, 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 King County Public Health (at the numbers listed below) , all:

 F ailure s of the disinfection system s

.

 C ollection system overflows other than permitted CSO discharges

.Page 18 of 55 Permit No. WA0 0 29181



###  P lant bypass es discharging to marine surface waters , other than as
described in Section S10

.

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

Additionally, f

or any sanitary sewer overflow (SSO) that discharge s to

a m unicipal separa te storm sewer system (MS4) , th e Permittee must notify the appropriate MS4 owner or operat or

.

Northwest Regional Office 425

- 649

- 7000 Department of Health, Shellfish Program 360

- 236

- 3330 (business hours)
360

- 789

- 8962 ( after business hours) Public Health of Seattle

- King County 206

- 296

- 4932



### b. Twenty

-

four

- hour reporting

The Permittee must report the following occurrences of non

- compliance 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 non

- compliance 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 Section S5.F , “Bypass Procedures”).

3. Any up set that causes an exceedance of an effluent limit in the permit (See G15, “Upset”).

4. Any violation of a maximum daily or instantaneous maximum discharge limit for any of the pollutants in Section S1 of this permit for the West
Point o utfall 001

. 5. Any overfl ow 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 w ithin five days

The Permittee must also submit a written report within five business 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 non

- compliance and its cause.

2. The period of non

- compliance, including exact dates and times.

3. The estimated time the Permittee expects the non

- compliance to continue if not yet corrected.

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

non

- compliance.Page 19 of 55 Permit No. WA0 0 29181



### 5. If the non

- compliance 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 viola tion 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

. Com pliance 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 submi t reports to the address listed in S 3. B

. S3. G

. Other reporting

a. Spills of oil or hazardous m aterials

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

. You can
ob tain further instructions at the following website: http://www.ecy.wa.gov/programs/spills/other/reportaspill.htm

. 

### 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. H

. M aintaining a copy of thi

s permit

The Permittee must keep a copy of this permit at all treatment facilit ies and make it available upon request to Ecology inspectors.

S4. Facility loading (West Point WWTP)

S4. A. Design criteria

The flows or waste loads for the permitted West Point WWTP must not exceed the following design criteria:

Maximum Month Design Flow (MMDF) 215 MGD BOD 5 

### Influent Loading for Maximum Month 201 ,000 lbs/day TSS Influent Loading for Maximum Month 218 ,000 lbs/dayPage 20 of 55 Permit No. WA0 0 29181



### 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 month s , 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

unconta minated 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 a ssociated with the plan must meet the requirements
of WAC 173

- 240

- 060, "Engineering Report," and be approved by Ecology prior to any construction.

S4. C. Duty to mitigate

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

, us e , or disposal of sludge or biosolids 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 when ever 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

.Page 21 of 55 Permit No. WA0 0 29181



### 2. This notice must include an evaluation of the wastew ater 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

. Wasteload assessment

The Permittee must conduct wasteload assessment s of the West Point WWTP and each CSO treatment plant and submit a report to Ecology with the next permit application

. The Permittee must also submit the report electronic ally

. The report
must contain:

1. A description of compliance or non

- compliance with the permit effluent
limits

. 2. A comparison between the existing and design :

a. M onthly average dry weather and wet weather flows

. b. P eak flows

.

c. C BOD 5 

### and TSS loading s (West Point only)

. d. 5

- year average of annual discharge events and annual discharge volume for the Alki and Carkeek CSO treatment plants.

3. The percent change in the above parameters since the previous report.

4. T he present and design population or population equivalent

. 5. The proj ected population growth rate

.
6. The estimated date upon which the Permittee expects the wastewater treatment plant to reach design capacity, according to the most restrictive of the parameters above

.

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 keep ing 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.

S5. A. Certified operator
These permitted facilities must be operated by an operator certified by the state of Washington for at least a Class IV plant

. This operator must be i n responsible charge of the day

- to

- day operation of the wastewater treatment facilities

. An operator certified for at least a Class III plant must be in charge during all regularly scheduled shifts.Page 22 of 55 Permit No. WA0 0 29181



### S5. B. O peration and maintenance program

The Permittee mus t:

1. Maintain the operation and maintenance program for the entire sewage system under the ownership and control of KC

. 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. S hort

- term reduction

The Permittee must schedule any facility maintenance, which might require interruption of wastewater treatment and degra de 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 notificatio n 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 pl ant 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

- 9 9

- 74

- 001) at the

w astewater 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.

S5. E. Prevent connection of inflow

The Permittee must strictly enforce its sewer ordinances and n ot allow the connection of inflow (roof drains, foundation drains, etc.) to the sanitary sewer system where under ownership and control of King County.Page 23 of 55 Permit No. WA0 0 29181



### 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. B ypass for essential mainten ance without the potential to cause violation of permit limits or conditions

. This permit authorizes a b ypass if it allows for essential maintenance and does not have the potential to cause violations of limits or other conditions of this permit, or advers ely 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. B ypass which is unavoidable, unanticipated, and results in non

- compliance of

t his 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.

c. Ecology is properly notified of the bypass as required in Special C ondition
S3

. E of this permit.

3. If bypass is anticipated and has the potential to result in non

- compliance 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.

 

### A cost

- effectiveness analysis of alternatives including comparative resource damage assessment.Page 24 of 55 Permit No. WA0 0 29181

 

### 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 m ust 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 by pass 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, stop ping 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.

Afte r 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. O perations and maintenance ( O&M) manual

a. O&M manual submittal and requirements

The Permittee must:

1. Review the O&M m anual s at least annually

.Page 25 of 55 Permit No. WA0 0 29181



### 2. Submit to Ecology for review and approval substantial changes or updates
to the O&M m anual s whenever it incorporates them into the manual

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

3. Keep the approved O&M m anual s at the permitted facility.

4. Follow the instructions and proc edures of these manual s

. b. O&M manual components

In addition to the requirements of WAC 173

- 24 0

- 080 (1) through (5), the
O&M m anual s must include:

 

### Emergency procedures for cleanup in the event of wastewater system upset or failure.

 

### 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 the se components

.

 

### Wastewater system maintena nce procedures that contribute to the generation of process wastewater.

 

### Reporting protocols for submitting reports to Ecology to comply with the reporting requirements in the discharge permit.

 

### 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).

 

### T reatment plant process control monitoring schedule s

.

S6. Pretreatment

S6. A. General r equirements

1. The Permittee must implement the Industrial Pretreatment Program in accordance with King County Code 28.84.060 as amended by King Co unty Ordinance No. 11963 on January 1, 1996, legal authorities, policies, procedures, and financial provisions described in the Permittee's approved pretreatment program submittal entitled "Industrial Pretreatment Program"
and dated April 27, 1981; any app roved revisions thereto; and the General Pretreatment Regulations (40 CFR Part 403)

. At a minimum, the Permittee must undertake the following pretreatment implementation activities:

a. Enforce categorical pretreatment standards under Section 307(b) and (c)
of the Federal Clean Water Act (hereinafter, the Act), prohibited discharge standards as set fort h in 40 CFR 403.5, local limits , or state standards, which ever are most stringent or apply at the time of issuance
or modification of a local industrial waste d ischarge permit

. Locally derived limits are defined as pretreatment standards under Section 307(d) of the Act and are not limited to categorical industrial facilities.Page 26 of 55 Permit No. WA0 0 29181



### b. Issue industrial waste discharge permits to all significant industrial users [SIUs, as d efined in 40 CFR 403.3( v )(i)(ii)] contributing to the treatment system, including those from other jurisdictions

. Industrial waste discharge permits must contain as a mini mum, all the requirements of
40 CFR 403.8 (f)(l)(iii)

. The Permittee must coordinate the permitting process with Ecology regarding any industrial facility which may possess a state waste discharge permit issued by Ecology

.

c. Maintain and update, as necessary, records identifying the nature, character, and volume of pollutants contributed by industrial users to the
treatment works

. The Permittee must mainta in records for at least a
three

- year period.

d. Perform inspections, surveillance, and monitoring activities on industrial users to determine or confirm compliance with pretreatment standards and requirements

. The Permittee must conduct a thorough inspection of SIUs annually , except Middle

- Tier Categorical Industrial Users

, as defined by 40 CFR 403.8(f)(2)(v)(B)&(C)

, need only be inspected once every two

years , unless they discharge to a CSO ou tfall (controlled and uncontrolled) located within the Lower Duwamish Waterway cleanup site boundary , in which case they must be inspected annually. The Permittee must conduct regular local monitoring of SIU wastewaters commensurate with the
character and volume of the wastewater but not less than once per year except for Middle

- Tier Categorical Industrial Users which may be sampled once every two years

. The Permittee must collect and analyze samples in accordance with 40 CFR Part 403.12(b)(5)(ii)

- (v) and 4 0 CFR
Part 136.

e. Enforce and obtain remedies for non

- compliance by any industrial users with applicable pretreatment standards and requirements

. Once violations have been identified, the Permittee must take timely and appropriate
enforcement action to address the non

- compliance

. The Permittee's action must follow its enforcement response procedures and any amendments,
thereof.

f. Publish, at least a nnually in a newspaper of general circulation within the Permittee's service area, a list of all non

- domestic users which, at any time in the previous 12 months, were in significant non

- compliance as defined in 40 CFR 403.8(f)(2)(vii).

g. If the Permittee elects to conduct sampling of an SIU's discharge in lieu of requiring user self

- monitoring, it must satisfy all requirements of 40
CFR Part 403.12

. This includes monitoring and record keeping requirements of sections 403.12(g) and (o)

. For SIU's subject to categorical standards ( i.e., CIUs), the Permittee may either complete baseline and initial compliance reports f or the CIU (when required by 403.12(b) and (d)) or require these of the CIU

. The Permittee must ensure SIUs are provided the results of sampling in a timely manner, inform SIUs of their right to sample, their obligations to report any sampling they do, to respond to non

- compliance, and to submit other notifications

.Page 27 of 55 Permit No. WA0 0 29181



### These include a slug load report (403.12(f)), notice of changed discharge (403.12(j)), and hazardous waste notifications (403.12(p))

. If sampling for the SIU, the Permittee must not sample less than once in every six month period unless the Permittee's approved program includes procedures for reduction of mo nitoring for Middle

- Tier or
Non

- Significant Categorical Users per 403.12(e)(2) and (3) and those procedures have been followed.

h. Develop and m aintain a data management system designed to track the status of the Permittee's industrial user inventory, industrial user discharge characteristics, and compliance status.

i. Maintain adequate staff, funds, and equipment to implement its pretreatment progra m. j. Establish, where necessary, contracts or legally binding agreements with contributing jurisdictions to ensure compliance with applicable pretreatment requirements by commercial or industrial users within these jurisdictions

. These contracts or agreement s must identify the agency responsible for the various implementation and enforcement activities to be performed in the contributing jurisdiction

. 2. Per 40 CFR 403.8(f)(2)(vii), the Permittee must evaluate each Significant
Industrial User to determine if a Slug Control Plan is needed to prevent slug discharges which may cause interference, pass

- through, or in any other way result in violations of the Permittee’s regulations, local limits or permit
conditions

. The Slug Control Plan evaluation shall occur with in one year of a user’s designation as a SIU

. In accordance with 40 CFR 403.8(f)(1)(iii)(B)(6) the Permittee shall include slug discharge control requirements in an SIU’s permit if the Permittee determines that they are necessary.

3. Whenever Ecology determi nes that any waste source contributes pollutants to the Permittee's treatment works in violation of Subsection (b), (c), or (d) of Section 307 of the Act, and the Permittee has not taken adequate corrective action, Ecology will notify the Permittee of this determination

. If the Permittee fails to take appropriate enforcement action within 30 days of this notification, Ecology may take appropriate enforcement action against the
source or the Permittee.

4. Pretreatment Report

The Permittee must provide to Ecolog y an annual report that briefly describes its program activities during the previous calendar year. By March 31 st 

### , the Permittee must send the annual report to Ecology at:

Water Quality Permit Coordinator Department of Ecology Northwest Regional Office
319 0 160 th 

### Avenue SE Bellevue, WA 98008

- 5452Page 28 of 55 Permit No. WA0 0 29181



### The report must include the following information:

a. An updated listing of non

- domestic industrial dischargers

. Starting with the report submitted in 2016, the list must identify , for each discharger
with a King County discharge authorization (minor or major) or discharge permi t , the downstream CSO outfall ( s ) t o which the discharger
contributes , where applicable

. b. Results of wastewater sampling at the treatment plant as specified in
Subsection S6. B below

. T he Permittee must calculate removal rates for each pollutant and evaluate the adequacy of th e existing local limits in prevention of treatment plant interference, pass through of pollutants that
could affect receiving water quality and biosolids contaminat ion.

c. Status of program implementation, including:

i. Any substantial modifications to the pretreatment program as originally approved by Ecology, including staffing and funding
levels.

ii. Any interference s , upset s , or permit violations experienced at the
WWTP that are directly attributable to wastes from industrial users.

iii. Listing of industrial users inspected and/or monitored, and a summary of the results.

iv. Listing of industrial users scheduled for inspection and/or monitoring for the next year, and expected fr equencies.

v. Listing of industrial users notified of promulgated pretreatment standards and/or local standards as required in 40 CFR 403.8(f)(2)(iii)

. The list must indicate which industrial users are on compliance schedules and the final date of compliance for each.

vi. Listing of industrial users issued industrial waste discharge permits.

vii. Planned changes in the pretreat ment program implementation plan.

d. Status of compliance activities, including:

i. Listing of industrial users that failed to submit baseline moni toring reports or any other reports required under 40 CFR 403.12 and in the Permittee's pretreatment program, dated April 27, 1981.

ii. Listing of industrial users that were at any time during the reporting period not complying with federal, state, or local pr etreatment standards or with applicable compliance schedules for achieving those standards, and the duration of such non

- compliance.

iii. Summary of enforcement activities and other corrective actions taken or planned against non

- complying industrial users

. The Permittee must supply to Ecology a copy of the public notice of facilities that were in significant non

- compliance.Page 29 of 55 Permit No. WA0 0 29181



### 5. The Permittee must request and obtain approval from Ecology before making any significant changes to the approved local pretreatment progr am

. The Permittee must follow the procedure in 40 CFR 403.18 (b) and (c)

. S6. B. Monitoring r equirements

The Permittee must monitor its influent, effluent, and biosolids at the West Point
WWTP for the priority pollutants identified in Tables II and III of Appendix D of 40 CFR Part 122 as amended, any compounds identified as a result of Condition S6.B.4, and any other pollutants expected from nondomestic sources using U.S.
EPA

- approved procedure s for collection, preservation, storage, and analysis

. The Permittee must test influent, effluent, and biosolids samples for the priority pollutant metals (Table III, 40 CFR 122, Appendix D) on a quarterly basis throughout the term of this permit

. The Perm ittee must test influent, effluent, and
biosolids samples for the organic priority pollutants (Table II, 40 CFR 122, Appendix D) on an annual basis.

1. The Permittee must sample West Point WWTP influent and effluent on a day when industrial discharges are oc curring at normal to maximum levels

. The
Permittee must obtain 24

- hour composite samples for the analysis of acid and base/neutral extractable compounds and metals

. The Permittee must collect samples for the analysis of volatile organic compounds and sampl es must be collected using grab sampling techniques at equal intervals for a total of four grab samples per day.

The laboratory may run a single analysis for volatile pollutants (using GC/MS procedures approved by 40 CFR 136 ) for each monitoring day by

co mpositing equal volumes of each grab sample directly in the GC purge and trap apparatus in the laboratory, with no less than 1 ml of each grab included in the composite.

Unless otherwise indicated, all reported test data for metals must represent the
total amount of the constituent present in all phases, whether solid, suspended, or dissolved, elemental or combined including all oxidation states.

The Permittee must handle, prepare, and analyze all wastewater samples taken for GC/MS analysis using procedures approved by 40 CFR 136.

2. The Permittee must collect a biosolids sample concurrently with a wastewater sample as a single grab sample of residual biosolids

. Sampling and analysis must be performed using procedures approved by 40 CFR 136 unless the
Permittee requests an alternate method and Ecology has approved.

3. The Permittee must take c yanide, phenols, and oils as grab samples

. Oils must be hexane soluble or equivalent, and should be measured in the influent and effluent only.

4. In addition to quantifying pH, oil and grease, and all priority pollutants, the Permittee must make a reasonable attempt to identify all other substances and quantify all pollutants shown to be present by gas chromatograph/mass spectrometer (GC/MS) analysis using procedures approved by 40 CFR 136

. The Permittee should attempt to make determinations of pollutants for eachPage 30 of 55 Permit No. WA0 0 29181



### fraction, which produces identifiable spectra on total ion plots (reconstructed gas chromatograms)

. The Permittee should attempt to make determinations from all peaks w ith responses 5% or greater than the nearest internal standard

. The 5% value is based on internal standard concentrations of 30  g/l, and must be adjusted downward if higher internal standard concentrations are used or adjusted upward if lower internal standard concentrations are used

. The Permittee may express results for non

- substituted aliphatic compounds as total hydrocarbon content

. The Permittee must use a laboratory whose computer data processing programs are capable of comparing sample mass spect ra to a computerized library of mass spectra, with visual confirmation by an experienced analyst

. For all detected substances which are determined to be pollutants, the Permittee must conduct additional sampling and appropriate testing to determine concent ration and variability, and to evaluate trends.

S6. C. Reporting of m onitoring r esults

The Permittee must include a summary of monitoring results in the Annual Pretreatment Report

. S6. D. Local l

imit d evelopment

As sufficient data become available, the Permi ttee must, in consultation with Ecology, reevaluate their local limits in order to prevent pass through or
interference

. On a case

- by

- case basis, as applicable, the Permittee should consider the impacts of CSO discharges on the receiving waterbody when est ablishing limits for individual permittees. If Ecology determines that any pollutant present causes pass through or interference, or exceeds established biosolids standards,
the Permittee must establish new local limits or revise existing local limits as

r equired by 40 CFR 403.5

. Ecology may also require the Permittee to revise or establish local limits for any pollutant discharged from the treatment works that has a reasonable potential to exceed the water quality standards, sediment standards, or establis hed effluent limits, or causes whole effluent toxicity

. Ecology makes this determination in the form of an Administrative Order.

Ecology may modify this permit to incorporate additional requirements relating to
the establishment and enforcement of local li mits for pollutants of concern

. Any permit modification is subject to formal due process procedures under state and federal law and regulation.

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 QualityPage 31 of 55 Permit No. WA0 0 29181



### Standards, Chapter 173

- 200 WAC. The Permittee must apply for a permit or permit modification as may be requir ed for such discharges to state ground or
surface waters

.

S 8

. Acute toxicity

S 8

. A

. Acute t esting

The Permittee must:

1. Conduct acute toxicity testing on final West Point WWTP effluent during the first and third quarters of 2017

. 2. Submit the results to Ecology with the permit renewal application.

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 eac h acute toxicity test:

Acute Toxicity Tests Species M ethod

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



### S 8

. 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 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

repor t, 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 co mpletion

. 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 th e 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 Subs ection 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
f reshly collected effluent.Page 32 of 55 Permit No. WA0 0 29181



### 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 collect eff luent samples for whole effluent toxicity testing just prior to the chlorination step in the treatment process.

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 3.6 % effluent.

8. A ll whole effluent toxicity tests that involve hypothesis testing must comply with the acute statistical power standa rd 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

.

S 9

. Chronic toxicity

S 9

. A

. Chronic t esting

The Permittee must:

1. Conduct chronic toxicity testing on final West Point WWTP effluent during the second and fourth quarters of 2017.

2. Submit the results to Ecology with the permit renewal a pplication

. 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 3.6 % effluent. The series
of dilutio ns should also contain the CCEC of 0.53 % 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



### S 9

. 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 labPage 33 of 55 Permit No. WA0 0 29181



### provides the toxicity test data in electronic format for entry into Ecology’s database, then the Permittee must send the d ata 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 N o. 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 S ubs ection C or pristine natural water of sufficient quality for good control performance.

6. The Permittee must collect effluent samples for whole effluent toxicity testing just prior to the chlorination step in the treatment process

.
7. The Permittee may c hoose 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 t he ACEC

. The CCEC and the ACEC may either substitute for the effluent concentrations
that are closest to them in the dilution series or be extra effluent
concentrations

. The CCEC equals 0.53 % effluent

. The ACEC equals 3.6 %
effluent.

8. All whole effluent toxi city tests that involve hypothesis testing must comply with the chronic statistical power standard of 39% 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.

S1 0

. Wet w eather o peration

CSO

- related bypass of the secondary treatment portion of the West Point WWTP is
authorized when the instantaneous flow rate to the WWTP exceeds 300 MGD as a result of precipitation even ts

. Bypasses that occur when the instantaneous flow rate is less than 300 MGD are not authorized under this condition and are subject to the bypass provisions as stated in S5.F of the permit

. In the event of a CSO

- related bypass
authorized under this condi tion, the Permittee must minimize the discharge ofPage 34 of 55 Permit No. WA0 0 29181



### pollutants to the environment

. At a minimum, CSO

- related bypass flows must receive solids and floatables removal, primary clarification, and disinfection

. The final discharge must at all times meet the eff luent limits of this permit as listed in S1.

The Permittee must maintain records of all CSO

- related bypasses at the treatment plant. These records must document the date, duration, and volume of each bypass event, and the magnitude of the precipitation eve nt

. The records must also indicate the effluent flow rate at the time when bypassing is initiated

. The Permittee must report a ll occurrences of bypassing on a monthly and annual basis

. The monthly report must include the above
information and must be inclu ded in narrative form with the discharge monitoring report. The annual report must include all of the above information in summary format and should be reported in the annual CSO report per S11.C

.

S 1 1

. Combined sewer overflows

S 1 1 .A. Authorized CSO dischar ge locations

Beginning on the effective date of this permit, the Permittee may discharge
combined wastewater and stormwater from the 38 combined sewer overflow (CSO) outfalls listed in

Table 5 . These point source discharges occur intermittently when rain events overload the combined sewer system. The permit prohibits discharges from the CSO outfall sites except as a result of preci pitation. This permit does not authorize discharges from CSO outfalls that threaten characteristic uses of the receiving water as identified in the water quality standards, Chapter 173

- 201A
WAC , or that result in an exceedance of the Sediment Management St andards, Chapter 173

- 204 WAC

.

Table 5 . Permitted CSO outfalls (38)

Outfall No. Facility Name Receiving Water Latitude Longitude

003 Ballard Siphon Reg

. via Seattle s torm d rain Lake Washington Ship Canal 47.663916 ̊

- 122.382333 ̊

004 11 th Ave NW (AKA East Ballard) Lake Washington Ship Canal 47.659491 ̊

- 122.370774 ̊

006 Magnolia Overflow Elliott Bay/Puget Sound 47.630184 ̊

- 122.399021 ̊

007 Canal Street Overflow Lake Washington Ship Canal 47.651856 ̊

- 122.358113 ̊

008 3rd Ave W and Ewing St. Lake Washington Ship Canal 47.652084 ̊

- 122.360052 ̊

009 Dexter Ave Regulator Lake Union 47. 632273  ̊

- 122. 339235  ̊

011 E Pine St. PS Emergency Overflow Lake Washington 47.614926 ̊

- 122.280304 ̊

012 Belvoir Pump Station Emergency Overflow Lake Washington 47.656698 ̊

- 122.287589 ̊

013 MLK Trunkline Overflow

- via storm drain Lake Washington 47.523285 ̊

- 122.26295 0  ̊

014 Montlake Overflow Lake Washington Ship Canal 47.64711 0  ̊

- 122.304861 ̊

015 University Regulator Lake Washington Ship Canal 47. 64892 9  ̊

- 122. 311296  ̊

018 Matthews Park PS Emergency Overflows Lake Washington 47.697458 ̊

- 122.27265 0  ̊

027a Denny Way Regulator Elliott Bay 47.618139 ̊

- 122.361888 ̊

028 King Street Regulator Elliott Bay 47.599003 ̊

- 122.337425 ̊

029 Kingdome Elliott Bay 47.592532 ̊

- 122.342106 ̊

030 Lander St. Regulator Elliott Bay 47. 58147 6  ̊

- 122. 342997  ̊Page 35 of 55 Permit No. WA0 0 29181

Outfall No. Facility Name Receiving Water Latitude Longitude

031 a
, b, c Hanford #1 Overflow

- Via Diagonal Storm
Drain Duwamish River 47.563108 ̊

- 122.345315 ̊

032 Hanford #2 Regulator Duwamish

- East Waterway 47.577223 ̊

- 122.34278 ̊

033 Rainier Ave Pump Station Lake Washington 47.571374 ̊

- 122.27553 ̊

034 E. Duwamish Pump Station Duwamish River 47. 562985  ̊

- 122. 345272  ̊

035 W. Duwamish Pump Station Duwamish River 47. 56322 4  ̊

- 122. 348256  ̊

036 Chelan Ave Regulator Duwamish

- West Waterway 47.573667 ̊

- 122.357779 ̊

037 Harbor Avenue Regulator Duwamish t o Elliott Bay 47.573706 ̊

- 122.361159 ̊

038 Terminal 115 Overflow Duwamish River 47.54826 ̊

- 122.340503 ̊

039 Michigan S. Regulator Duwamish River 47.54353 ̊

- 122.334967 ̊

040 8th Ave South Reg

. (W . Marginal Way PS ) Duwamish River 47.533648 ̊

- 122.322639 ̊

041 Brandon Street Regulator Duwamish River 47.554661 ̊

- 122.340832 ̊

042 Michigan W. Reg ulator Duwamish River 47.541561 ̊

- 122.334994 ̊

043 East Marginal Pump Station Duwamish River 47.537048 ̊

- 122.31849 ̊

044 a Norfolk Outfall Duwamish River 47.511941 ̊

- 122.297356 ̊

045 Henderson Pump Station Lake Washington 47.523285 ̊

- 122.26295 ̊

048a ,b North Beach Pump Station: a.) wet well

,

b) inlet structure Puget Sound 47.704007 ̊ 47.702142 ̊ - 122. 392337  ̊

- 122.392564 ̊

049 30th Avenue NE Pump Station Lake Washington 47.656698 ̊

- 122.287589 ̊

05 2 53rd Avenue SW Pump Station Puget Sound 47.584799 ̊

- 122.402552 ̊

054 63rd Avenue SW Pump Station Puget Sound 47.570016 ̊

- 122.416301 ̊

055 SW Alaska Street Overflow Puget Sound 47.559442 ̊

- 122.406947 ̊

056 Murray Street Pump Station Puget Sound 47.540275 ̊

- 122.400003 ̊

057 Barton Street Pump Station Puget Sound 47.523886 ̊

- 122.396393 ̊



### S 1 1 .B

. Nine minimum controls

In accordance with chapter 173

- 245 WAC and US EPA CSO control policy (59 FR 18688), the Permittee must implement and document the following nine minimum controls (NMC) for CSOs . The Permittee must document c ompliance
with the NMC s in the annual CSO report as required in Special Condition S 1 1

. C

. The NMCs are considered technology

- based requirements for CSO systems. In order to comply with these requirements, t he Permittee must:

1. Implement proper operation and maintenance programs for the sewer system
and all CS O outfalls to reduce the magnitude, frequency, and duration of CSOs. The program must consider regular sewer inspections; sewer, catch basin, and regulator cleaning; equipment and sewer collection system repair or replacement, where necessary; and disconne ction of illegal connections.

2. Implement procedures that will maximize use of the collection system for wastewater storage that can be accommodated by the storage capacity of the collection system in order to reduce the magnitude, frequency, and duration of
CSOs.Page 36 of 55 Permit No. WA0 0 29181



### 3. Review and modify, as appropriate, its existing pretreatment program to minimize CSO impacts from the discharges from non

- domestic users. Starting with its annual Pretreatment Report submitted in 2016, the County must include in the report , f

or each discharger with a King County discharge
authorization (major or minor) or discharge permit, the downstream CSO outfall(s) to which the discharger contributes, where applicable

. 4. Operate the wastewater treatment plant at maximum treatable flow during all wet weather flow conditions to reduce the magnitude, frequency, and duration
of CSOs

. The Permittee must deliver all flows to the treatment plant within the constraints of the treatment capacity of the treatment works

. 5. Not discharge overflows from CSO outfalls except as a result of precipitation

events ; d ry weather overflows from CSO outfalls are prohibited. The Permittee must report each dry weather overflow to the permitting authority immediately per Special Condition S3.E. When it detects a dry weather overflow, the Permittee must begin corrective action immediately and inspect the dry weather overflow each subsequent day until it has eliminated the
overflow.

6. Implement measures to control solid and fl oatable materials in CSOs.

7. Implement a pollution prevention program focused on reducing the impact of CSOs on receiving waters. Best management practices (BMPs) to control pollutant sources in stormwater in CSO basins must be an element of the pollution pr evention program

. Ecology’s Stormwater Management Manual for Western Washington (2012) contains appropriate BMPs for reference

. Starting with t he Annual CSO Report submitted in 201 7 , the Permittee must include a detailed description of the pollution preven tion program, appropriate BMPs, and the legal authority and administrative procedures that will be used

to ensure the program is being implemented

. If the legal authority and/or administrative procedures are not in place, th e Annual CSO Report must
include a detailed description of the steps needed to establish such a program and the timeline for getting the program in place

. 8. Continue to i mplement the public notification process that inform s citizens of when and where CSOs occur. The process must continue to include (a) a mechanism to alert citizens of CSO occurrence s and (b) a system to determine the nature and duration of conditions that are potentially harmful for users of receiving waters due to CSOs.

9. Monitor CSO outfalls to characterize CSO impacts and the efficacy of CSO
controls. This must include collec tion of data to document existing baseline
conditions and to evaluate the efficacy o f the technology

- based controls

. This
data must include:

a. Characteristics of the combined sewer system

, including the population served by the combined portion of the system and location s of all CSO
outfalls

.Page 37 of 55 Permit No. WA0 0 29181



### b. Total number of CSO events, and the frequency and duration of CSOs for
all events.

c. Locations and designated uses of receiving water bodies.

d. Water qual ity data for receiving water bodies.

e. Water quality impacts directly related to CSO (e.g., beach closing, floatables, wash

- up episodes, fish kills).

S 1 1 .C

. Combined sewer overflow reporting

1. Monthly CSO Report

The P ermittee must submit a monthly report by the 15 th 

### of each month that
includes:

a. D ischarge monitoring reports (DMRs) and narrative summaries for each CSO treatment plant (Alki, Carkeek, Elliott West, and Henderson) , and

b. A n event

- based summary that includes discharge volume, dura tion, and precipitat ion for all CSO discharge event s that occur during the reporting period.

2. Annual CSO Report

The Permittee must submit a CSO Annual R eport to Ecology for review by July 31 st 

### of each year . The CSO Annual Report must cover the previous calendar year. The report must comply w ith the requirements of WAC
173

- 245

- 090(1) and must include documentation of compliance with the Nine
Minimum Controls for CSOs described in Special Condition S 11. B. The
P ermittee must submit paper and electronic copies of the report , and Excel spreadsheet copies of significant spreadsheets . The CSO Annual R eport must include the following information:

a. A summary of the number and volume of untreated discharge events per outfall for that year.

b. A summary of the 20

- year moving average number of untreated discharge events per outfall, calculated once annually.

c. An event

- based reporting form (provided by Ecology) for all CSO discharges for the reporting period, summarizing all data collected according to the monitoring schedule in Special Condition S11 .B .9

. d. An explanation of the previous year’s CSO reduction accomplishments.

e. A list of CSO reduction projects planned for the next year.

f. A list of which permitted CSO outfalls can b e categorized as meeting the one untreated discharge per year on a 20

- year moving average performance standard. This annual assessment may be based on histo rical long

- term discharge data , modeling, or other reasonable methods as approved by Ecology.Page 38 of 55 Permit No. WA0 0 29181



### S 1 1 .D

. Combined sewer overflow reduction plan amendment

The Permittee must submit an amendment of its 2012 Long Term Control Plan
Amendment (also referred to as a CSO Reduction Plan ) to Ecology for review and approval with the application for permit renewal

. The amendment must comply with the requirements of WAC 173

- 245

- 090(2)

. S 1 1 .E. Engineering r eports and p lans and s pecifications for CSO r educ tion p rojects

The Permittee must submit to Ecology an engineering report for each specific CSO reduction construction project. Engineering documents associated with each CSO reduction project must meet the requirements of WAC 173

- 240

- 060, Engineering Repor t , and be approved by Ecology prior to construction. The report

must:

1. Specify any contracts, ordinances, methods of financing, or any other arrangements necessary to achieve this objective.

2. Describe how each project will achieve the performance standard o f greatest reasonable control and explicitly state the expected frequency of overflow events per year per associated outfall after the CSO reduction construction project has been completed.

3. Identify the potential hydraulic impact s of the project on downst ream conveyance and treatment facilities.

For each specific CSO reduction construction project, the Permittee must prepare and submit approvable plans and specifications consistent with chapter
173

- 240

- 070 WAC to Ecology for review and approval. Ecology mu st approve plans and specifications prior to construction.

Prior to the start of construction, the Permittee must submit to Ecology a construction quality assurance plan as required by chapter 173

- 240

- 075 WAC.

S 1 1

. F

. Requirements for controlled combined sewer overflows

a. CSOs identified as controlled

Based on monitoring data presented in King County’s 2012 Annual CSO Report and King County’s 2012 Long Term Control Plan Amendment , the 16
CSO outfalls listed in Table 6 meet the requirement of “greatest reasonable reduction” as defined in chapter WAC 173

- 245

- 020(22). Frequency of overflow events at these CSO outfalls, as a result of precipitation e vents, must continue to meet the performance standard.Page 39 of 55 Permit No. WA0 0 29181

Table 6 . Controlled CSO outfalls (16)

CSO Outfall No Location/Name Receiving Water Latitude Longitude

007 Canal Street Overflow Lake Washington Ship Canal 47.651856 ̊

- 122.358113 ̊

011 E Pine St. PS Emergency Overflow Lake Washington 47.614926 ̊

- 122.280304 ̊

012 Belvoir PS Emergency Overflow Lake Washington 47.656698 ̊

- 122.287589 ̊

013 MLK Trunkline Overflow

- via storm drain Lake Washington 47.523285 ̊

- 122.26295 ̊

018 Matthews Park PS Emergency Overflows Lake Washington 47.697458 ̊

- 122.27265 ̊

033 Rainier Ave Pump Station Lake Washington 47.571374 ̊

- 122.27553 ̊

034 E. Duwamish Pump Station Duwamish River 47.563224 ̊

- 122.348256 ̊

035 W. Duwamish Pump Station Duwamish River 47.562986 ̊

- 122.345272 ̊

040 8th Ave South Reg

. (W Marginal Way PS ) Duwamish River 47.533648 ̊

- 122.322639 ̊

043 East Marginal Pump Station Duwamish River 47.537048 ̊

- 122.31849 ̊

044 a Norfolk Outfall Duwamish River 47.511941 ̊

- 122.297356 ̊

045 Henderson Pump Station Lake Washington 47.523285 ̊

- 122.26295 ̊

049 30th Avenue NE Pump Station Lake Washington 47.656698 ̊

- 122.287589 ̊

05 2 53rd Avenue SW Pump Station Puget Sound 47.584799 ̊

- 122.402552 ̊

054 63rd Avenue SW Pump Station Puget Sound 47.570016 ̊

- 122.416301 ̊

055 SW Alaska Street Overflow Puget Sound 47.559442 ̊

- 122.406947 ̊



### b. Performance standards for controlled CSO outfalls

The performance standard for each controlled CSO outfall is not more than one discharge event per outfall per year on average, due to precipitation

. Ecology evaluates compliance with the performance standard annually based on a 20 year moving average. The Permittee must report the running 20

- year average number of overflow events per year during this permit term from
these CSO outfalls in the CSO Annual Report required in Section S 1 1

. C

.

c. CSO p ost construction monitoring

The Permittee must continue to implement a post construction compliance monitoring program to verify the effectiveness of CSO controls and to
demonstrate compliance with water quality standards and protection of designated uses. The Permittee must follow the approved King County 2012
Po st Construction Monitoring Plan and submit to Ecology for review and approval any proposed changes to this plan.

d. CSO post construction monitoring data report

The Permittee must submit to Ecology

, b y December 1, 201 9 , a post

- construction monitoring summa ry report that demonstrates how each
CSO outfall listed as controlled in Table 6 , as well as those brought under control during the permit term

, achiev es performance requirements and compli es with state water and sediment quality standards. The report mustPage 40 of 55 Permit No. WA0 0 29181



### conform to the approved CSO Post Construction Monitoring Plan

. For
outfalls with SMS exceedances associated with CSO discharge s , t he report
must describe clean

- up activities in the vicinity including clean

- up actions planned or that have been performed, targeted chemical s, any available

pre

- and post

- cleanup monitoring results, clean

- up project schedule, post

- project monitoring schedule, and a list of parties involved.

The outfalls scheduled to be controlled during this permit term and to be discussed in the CSO post c onstruction monitoring data report include: Dexter Avenue Regulator (DSN 009), Denny Way Regulator (DSN 027a), Harbor Avenue Regulator (DSN 037), Ballard Siphon Regulator (DSN 003), Barton (DSN 057), Murray (DSN 056), South Magnolia (DSN 006), and North Be ach (DSN 048).

S 1 2

. Spill c ontrol p lan

The Permittee must:

1. Review the West Point WWTP Spill Plan at least annually and update as needed.

2. Send updated plans to Ecology when significant changes are made.

3. Follow the plan and any supplements throughout the term of the permit.

The spill control plan must include the following:

1. A list of all oil and petroleum products and other materials used and/or stored on site, which when spilled, or otherwise released into the envi ronment, designate as dangerous waste (DW) or extremely hazardous waste (EHW) by the procedures set
forth in WAC 173

- 303

- 070

. Include other materials used and/or stored on site which may become pollutants or cause pollution upon reaching state's waters.

2. A description of preventive measures and facilities (including an overall facility plot showing drainage patterns) which prevent, contain, or treat spills of these materials.

3. A description of the reporting system the Permittee will use to alert responsible

m anagers and legal authorities in the event of a spill.

4. A description of operator training to implement the plan.

S 1 3

. Sediment monitoring

S 1 3 .A. Sediment sampling

– West Point WWTP

a

. Sediment sampling and analysis plan

Th e Permittee must submit to Ecology for review and approval a sediment sampling and analysis plan for sediment monitoring for the West Point
WWTP outfall . The Permittee must submit one paper copy and an electronic copy (preferably as a PDF ) by December 1, 2 01 6

. The purpose of the plan is to re

- characterize sediment quality in the vicinity of the discharge location

.Page 41 of 55 Permit No. WA0 0 29181



### The Permittee must :

 F ollow the guidance provided in the Sediment Source Control Standards
User Manual

, Appendix B: sediment sampling and analysis plan (Ecology, 2008). M ethod detection limits must be listed in the plan

.

 Collect e nough sediment in the top 10 cm at each station to allow for conventional parameter testing (percent solids, total orga nic carbon, particle size), chemistry testing , and if necessary, bioassay testing

. Chemistry tests must be performed before b ioassay tests and if there are Sediment Quality Standard (SQS) exceedances, then bioassay tests must be performed

.

 Chemistry : A nalyze conventional parameters and the full suite of 47 Sediment Management Standards ( SMS ) marine chemica ls at all stations

.

 Bioassay: Perform b ioassay tests at all stations with SQS exceedances.
R un parallel larval echinoderm tests, using standard protocols and screen tube manipulation, in order to see if a physical influence from turbidity in the overlying test water continues to lead to failed bioassays.

 Stations : C ollect samples at the same stations as the previous sampling

events. Identify the predominant current direction in the vicinity of the

out fall on all figures.

b

. Sediment data report

Following Ecology approval of the Sediment Sampling and Analysis Plan, the Permittee must collect sediments between August 15 th 

### and September 15 th



### . The Permittee must submit to Ecology a Sediment Data Report containing the results of the sediment samp ling and a nalysis no later than December 1, 2018. 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 an d analysis plan.

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 

### / ), and Ecology’s MyEIM tools must be used to confirm the accuracy of the submitted data ( http://www.ecy.wa.gov/eim/MyEIM.htm 

### ).

S 1 3

. B

. Sediment sampling

– CSO out fall s

The Permittee must model and/or collect sediment samples in the vicinities of
controlled CSO outfalls: E. Pine Street Pump Station Emergency Overflow (011), Belvoir (012)/30 th 

### Ave NE Pump Station (049)

, Martin Luther King (013)/Henderson Pump Station (045), Matthews Park Pump Station Emergency Overflow ( 018), and Rainier Avenue Pump Station Emergency Overflow (033) . A s ediment s ampling and

a nalysis p lan (SAP) must be submitted by December 1, 2016 in accordance with (a) below. Following Ecology approval of the s ediment SAP , the Permittee must collect
sedim ents according to the SAP . The Permittee must submit to Ecology a s ediment
d ata r eport , in accordance with (b) below, that contain s the sediment sampling and analysis results no later than December 1, 2018.Page 42 of 55 Permit No. WA0 0 29181



### In addition, t he Permittee must model and /or samp le sediments in accordance
with the ir approved 2012 Post Construction Monitoring Plan or any subsequent approved plan revisions

. Post construction monitoring of sediments is required with the completion of CSO projects once the CSO has been deemed controlled
unless sufficient recent data exists that shows there are no SMS exceedances

. An exception is made i f an area

- wide cleanup pr oject is planned with sediment sampl ing scheduled at cleanup project completion

. For each CSO outfall site that requires sediment monitoring, the Permittee must submit a sediment sampling and analysis plan and data report in accordance with the following.

a

. Sediment sampling and analysis plan

The Permittee must submit to Ecology for review and approval a sediment sampling and analysis plan (SSAP) for sediment monitoring at least eight months prior to sediment testing . The Permittee must submit one paper c op y and an electronic copy (preferably as a PDF). The purpose of the plan is to characterize sediment (the nature and extent of chemical contamination and biological toxicity) quality in the vicinity of the discharge location s . The SSAP
must be consistent with the CSO Sediment Quality Characterization Sampling and Analysis Plan in Appendix H of the County’s approved Post

- Construction Monitoring Plan. The P ermittee must list method detection limits in the plan.

b. Sediment data report

Following Ecology approval of the Sediment Sampling and Analysis Plan, the
Permittee must collect sediments according to the plan. The Permittee must submit to Ecology a Sediment Data Report containing the results of the sediment samp ling and analysis no l ater than ten months after the data was
collected

. 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.

In addition to a Sedimen t Data Report, the sediment chemical and biological data must be submitted to Ecology’s EIM database ( http://www.ecy.wa.gov/eim 

### / ),
and Ecology’s MyEIM tools must be used to confirm the accuracy of the
submitted data ( http://www.ecy.wa.gov/eim/MyEIM.htm 

### ).

S 1 3

. C

. Sediment quality summary at CSO outfalls

The Permittee mu st submit to Ecology an update to the 2009 Comprehensive Sediment Qua lity Summary Report no later than December 1, 20 18

. The 2009 report summarizes sediment data collected at all CSO outfalls including CSO treatment plant s . The purpose of this update is to keep CSO sediment monitoring history information consolidated to help King County and Ecology assess the potential for sediment impacts from CSO discharges.

This update report must provide any new site

- specific information including quantity and quality of the discharges, receiving water characteristics, and new knowledge about sediment quality near the CSO outfalls. The report must also
include a status of sediment cle anup sites and monitoring plans.Page 43 of 55 Permit No. WA0 0 29181



### Data not previously submitted and not yet formatted a nd future data must be
formatted in the EIM format.

S 1 4

. Outfall evaluation

The Permittee must inspect, once during the permit term, the submerged portion s of the
West Point WWTP and CSO treatment plant outfall line s and diffuser s to document their integri ty and continued function

. If conditions allow for a photographic verification, the Permittee must include such verification in the report s . T he Permittee must submit the inspection report s to Ecology w ith the NPDES Permit renewal application. The inspecto r must at minimum:

 Assess the physical condition of the outfall pipe s , diffuser s , and associated couplings.

 Determine the extent of sediment accumulation in the vicinity of the diffuser s

.

 Ensure diffuser ports are free of obstructions and are allowing uniform flow.

 Confirm physical location (latitude/longitude) and depth (at MLLW) of the diffuser
section s of the outfall s

.

 Assess physical condition of anchors used to secure the submarine line s

.

 For the West Point WWTP, follow

- up on the findings from the 2011 inspection by inspecting gaps and checking for leaks at station 30.

S1 5

. Elliott West CSO t reatment p lant

– c opper r eduction a ssessment

The Permittee must assess copper discharges from the Elliott West CSO treatment plant
and submit a Copper Reductio n Assessment R eport to Ecology by November 1, 2018. As part of the a ssessment

, the Permittee must:

1. E valuate sample reliability /accuracy of copper measurement s , including potential sample interferences

, from the Elliott West facility

. 2. Assess copper discharge patterns such as first flush or seasonal (wet season vs. dry season) impacts

, land use patterns , etc.

3. C onduct a copper source inventory and provide a list of significant copper sources.

4. Provide a description of copper source control options

. 5. Exa mine opportunities for outfall mixing enhancements.

6. Recommend a preferred strategy with corresponding schedule to address copper discharges from the Elliott West CSO treatment plant.

S1 6

. Elliott West CSO treatment plant

– settleable solids removal assessm ent

The Permittee must assess settleable solids discharges from the Elliott West CSO treatment plant and submit a Settleable Solids Reduction Assessment Report to Ecology by November 1, 2018. As part of the assessment, the Permittee must:

1. Assess settleable solids discharge patterns such as seasonal or first flush impacts

, stormwater vs. domestic wastewater concentrations, etc

.Page 44 of 55 Permit No. WA0 0 29181



### 2. Recommend a preferred strategy with corresponding schedule to address settleable solids discharges from the Elliott West CSO treatment plant in order to meet the annual average settleable solids limit

.

S 1 7

. Application for permit renewal or facility modification s

The Permittee must submit an application for renewal of this permit one year prior to its expiration date, or b y January 31, 2019. The Permittee must submit a paper copy and an electronic copy (preferably as a PDF)

. The Permittee must also submit a new application or application supplement at least one hundred eighty (180) da ys 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 t he permitted facility.Page 45 of 55 Permit No. WA0 0 29181



## 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 corpora tion, 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 establis hed 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.

b. In the case of a partnershi p, by a general partner.

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

d. 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 wastewat er 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 posit ion 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 matter s

. (A duly authorized representative may thus be either a named individual or any individual occupying a named position.)

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 ofPage 46 of 55 Permit No. WA0 0 29181



### paragraph G1 .2, above, must be submitted to Ecology prior to or tog ether 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, in cluding 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. T o sample or monitor, at reasonable ti mes, 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 procedure s 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 fa cts.

c. A material change in quantity or type of waste disposal.

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 perm it modification or termination.Page 47 of 55 Permit No. WA0 0 29181



### e. A change in any condition that requires either a temporary or permanent reduction, or elimination of any discharge or biosolids 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 occu rred 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 ter mination for reasons listed in 1 .a through 1. g of this section, and Ecology determines that modification or revocation and reissuance is

appropr iate.

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 G 7 ) 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 pla nned physical alterations or additions to the permitted facility, production increases, or process modification which
will result in:

1. T he 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 o f pollutants discharged.

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

. Following such notice, and the submittal of a new application or supplement to the existingPage 48 of 55 Permit No. WA0 0 29181



### 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 p ermit 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 aut horized 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 permi t 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 suc h 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. T he notice includes a written agreement between the existing and new Permittees containing a specific date transfer of permit responsibility, coverage, and liability
between them.

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

.Page 49 of 55 Permit No. WA0 0 29181



### 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 al ternative 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 substanc es
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 m ust 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 a lso submit to Ecology upon request, copies of records required to be kept by this permit.

G11. Other requirement s 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.

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.Page 50 of 55 Permit No. WA0 0 29181



### G15. Upset

Definition

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

- compliance with technology

- based permit effluen t limits because of factors beyond the reasonable control of the Permittee

. An upset does not include non

compliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive ma intenance, or careless or improper operation.

An upset constitutes an affirmative defense to an action brought for non

- compliance with such technology

- based permit effluent limits if the requirements of the following paragraph are met.

A Permittee who wish es to establish the affirmative defense of upset must demonstrate, through properly signed, contemporaneous operating logs, or other relevant evidence that:

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

. 2. T he permitted fa cility was being properly operated at the time of the upset

. 3. T he Permittee submitted notice of the upset as required in Special Condition S3. F

. 4. T he Permittee complied with any remedial measures required under S3. F 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 non

- compliance 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. T oxic pollutants

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

G19. Penalties for tampering

The Clean Water Act provides that any person who falsifies, tampers with, or knowingly renders inaccurate any monitoring device or method required to be m aintained 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.Page 51 of 55 Permit No. WA0 0 29181



### G20. Compliance schedules

Reports of compliance or non

- compliance 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 schedu le 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 i s 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 revis ed/updated service agreement

.Page 52 of 55 Permit No. WA0 0 29181



## 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 followin g table for permit and applicat ion 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 , or EPA has granted the laboratory written permission to use the method

.

 The Permittee knows that an alternate, less sensitive method (higher DL and QL) from those listed below is sufficient to produce measurable results in their effluent

.

 If the Permittee is unable to obtain the required DL and QL due to matrix effects (such as f or treatment plant influent or CSO effluent) , the Permittee must strive to achieve to lowest possible DL and QL and report the DL and QL in the required report.

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 re port or in the required report.

All pollutants that have numeric limits in Section S1 of this permit must be analyzed with the methods specified below. 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 polynuc lear 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 increa se 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 possi ble at a reasonable cost.

CONVENTIONAL PARAMETERS

Pollutant & CAS No. (if available) Recommended Analytical Protocol Detection (DL) 1 μg/L unless specified Quantitation Level

(QL) 2 μg/L unless specified Biochemical Oxygen Demand SM5210

- B 2 mg/L
Total Suspended Solids SM2540

- D 5 mg/L Total Ammonia (as N) SM4500

- NH3

- B and C/D/E/G/H Kerouel & Aminot 1997 0.3 mg/L

Dissolved oxygen SM4500

- OC/OG 0.2 mg/L Temperature (max. 7

- day avg.) Analog recorder or u se micro

recording devices known as thermistors 0.2o C

pH SM4500

- H + B N/A N/A

NONCONVENTIONAL PARAMETERS

Pollutant & CAS No. (if available) Recommended Analytical Protocol Detection (DL) 1 μg/L unless specified Quantitation Level

(QL) 2 μg/L unless specified Total Alkalinity SM2320

- B 1.3 mg/L as CaCO3 Chlorine, Total Residual SM4500 Cl G 4500 Cl D/E

, Hach 8370 50.0

Fecal Coliform SM 9221E,9222 N/A Specified in method

- sample aliquot dependent Nitrate + Nitrite Nitrogen (as N) SM4500

- NO3

- E/F/H 200 Nitrogen, Total Kjeldahl (as N) SM4500

- N org B/C and SM4500NH 3 - B/C/D/EF/G/H EPA 351.2 5 00Page 53 of 55 Permit No. WA0 0 29181

Pollutant & CAS No. (if available) Recommended Analytical Protocol Detection (DL) 1 μg/L unless specified Quantitation Level

(QL) 2 μg/L unless specified Nitrogen, Total (as N) SM4500

- N

- C 50 100 Soluble Reactive Phosphorus (as P) SM4500

- PE/PF 100 100 Phosphorus, Total (as P) SM 4500 PB followed by SM4500

- PE/PF 100 3 0 0

Oil and Grease (HEM) 1664 A or B 1,400 5,000 Salinity SM2520

- B 3 practical salinity units or scale (PSU or PSS) Settleable Solids SM2540

- F Sample and limit dependent Sulfate (as mg/L SO 4 ) SM4110

- B

, 4500

- SO4 E 7.1 mg/L Sulfide (as mg/L S) SM4500

- S 2 F/D/E/G 200 Sulfite (as mg/L SO 3 ) SM4500

- SO3B 2000
Total dissolved solids SM2540 C 20 mg/L
Total Hardness SM2340B C

, 200.7, 200.8 200 as CaCO 3

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 , 200.8 12.5 50 Magnesium, Total (7439

- 95

- 4) 200.7 , 200.8 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

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 B 5 10 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

, SM4500

- CN

- C,E 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

ACID COMPOUNDS

2

- Chlorophenol (95

- 57

- 8) 625 1.0 2.0 2,4

- Dichlorophenol (120

- 83

- 2) 625 0.5 1.0Page 54 of 55 Permit No. WA0 0 29181

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 2 .0 4 .0

2,4 dinitrophenol (51

- 28

- 5) 625 1. 5 3 .0
2

- Nitrophenol (88

- 75

- 5) 625 0.5 1.0
4

- nitrophenol (100

- 02

- 7) 625 1.0 2.0 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

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

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 20 40 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) 7 625 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 1.3 5 .0 Benzo( a )pyrene (50

- 32

- 8) 610/625 0.5 1.0Page 55 of 55 Permit No. WA0 0 29181

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. 5 1.0 Bis( 2

- ethylhexyl

)phthalate (117

- 81

- 7) 625 0. 3 1.0
4

- Bromophenyl phenyl ether (101

- 55

- 3) 625 0. 3 0. 5
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 2.0 4 .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 1.0 2.0 2,6

- dinitrotoluene (606

- 20

- 2) 609/625 1.0 2.0
Di

- n

- octyl phthalate (117

- 84

- 0) 625 0.3 0.6 1,2

- Diphenylhydrazine ( as Azobenzene )(122

- 66

- 7) 1625B , 625 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 2.0 4.0 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 0.4 0.75 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 1.0 2.0 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

DIOXIN 2,3,7,8

- Tetra

- Chlorodibenzo

- P

- Dioxin (176

- 40

- 16) (2,3,7,8 TCDD) 1613B 1.3 pg/L 5 pg/L

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)

– T he smallest detectable concentration of analyte greater than the Detection Limit (DL) where the accuracy (precision & bias) achieves the objectives of the int ended purpose. ( Report of the Federal Advisory Committee on Detection and Quantitation Approaches and Uses in Clean Water Act Programs Submitted to the US Environmental Protection Agency

, December 2007).
3. Soluble Biochemical Oxygen Demand method note: Firs t, 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 D x - 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 t rans

- 1, 3

- dichloropro pene (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 benzo fluoranthenes.