J.02_NPDES_NO._CA0108928.pdf

CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD

SAN DIEGO REGION

2375 Northside Drive, Suite 100, San Diego, CA 92108

Phone (619) 516-1990 ∙ Fax (619) 516-1994 www.waterboards.ca.gov/sandiego

ORDER NO. R9-2017-0024

AMENDING

ORDER NO. R9-2014-0009 AS AMENDED BY ORDER NO. R9-2014-0094,

NPDES NO. CA0108928

WASTE DISCHARGE REQUIREMENTS

FOR THE UNITED STATES SECTION OF THE

INTERNATIONAL BOUNDARY AND WATER COMMISSION

SOUTH BAY INTERNATIONAL WASTEWATER TREATMENT PLANT,

DISCHARGE TO THE PACIFIC OCEAN VIA THE SOUTH BAY OCEAN OUTFALL

The California Regional Water Quality Control Board, San Diego Region (San Diego Water Board), finds that:

Background

1. On February 13, 2013, the San Diego Water Board adopted Order No. R9-2013-0006, National Pollutant Discharge Elimination System (NPDES) No. CA0109045, establishing waste discharge requirements for the City of San Diego (City) to discharge up to 15 million gallons per day (MGD) of secondary-treated effluent from the South Bay Water Reclamation Plant (SBWRP) into the Pacific Ocean through the South Bay Ocean Outfall (SBOO).

2. On June 26, 2014, the San Diego Water Board adopted Order No. R9-2014-0009 (NPDES No. CA0108928), establishing waste discharge requirements for the U.S. Section of the International Boundary and Water Commission (Discharger or USIBWC) to discharge up to 25 MGD of secondary-treated effluent from the South Bay International Wastewater Treatment Plant (SBIWTP) into the Pacific Ocean via the SBOO.

3. The effluents from the SBWRP and the SBIWTP co-mingle as they discharge through the SBOO. Thus, the receiving water monitoring program is conducted jointly by the City and USIBWC to characterize the ocean receiving waters and the effects of the combined discharge on the ocean receiving waters. The joint monitoring effort achieves maximum efficiency and economy of resources through sharing of technical resources, trained personnel, and associated costs. The joint monitoring effort also creates an integrated receiving water monitoring program covering the combined discharges from the SBWRP and the SBIWTP to ocean waters.

4. On November 12, 2014, the San Diego Water Board adopted Order No. R9-2014-0094, to correct the requirements for the screening period for whole effluent toxicity (WET) testing contained in section III.C of Attachment E of Order No. R9-2014-0009, to make requested clarifications to Order No. R9-2014-0009, and to correct other typographical errors.

http://www.waterboards.ca.gov/sandiego

U.S. Section of the AMENDING ORDER NO. R9-2017-0024 International Boundary And Water Commission NPDES NO. CA0108928 South Bay International Wastewater Treatment Plant

5. The City also performs receiving water monitoring at the Point Loma Ocean Outfall (PLOO) in accordance with Order No. R9-2017-0007, NPDES No. CA0107409, Waste Discharge Requirements and National Pollutant Discharge Elimination System Permit for the City of San Diego, E.W. Blom Point Loma Wastewater Treatment Plant discharge to the Pacific Ocean through the Point Loma Ocean Outfall, adopted by the San Diego Water Board on April 12, 2017.

6. Chromium is a metal that is used mainly for making steel and other alloys. Chromium compounds, in either the chromium (III) or chromium (VI) forms, are used for chrome plating;

the manufacture of dyes and pigments, leather, and wood preservation; and the treatment of cooling tower water. Smaller amounts are used in drilling muds, textiles, and toner for copying machines.1 Total chromium is the sum of chromium (III) and chromium (VI) forms.

a. For total recoverable chromium (III) (trivalent chromium), Order No. R9-2014-0009 contains performance goals and quarterly influent and effluent monitoring requirements.

b. The Clean Water Act has no analytical test method approved for trivalent chromium. In order to obtain a value for trivalent chromium, two separate analytical methods must be used: one for total recoverable chromium and one for total recoverable chromium (VI), with the later value subtracted from the former value.

Purpose of this Order

7. USIBWC has requested that the San Diego Water Board modify the receiving water monitoring requirements in Order No. R9-2014-0009 (regulating the USIBWC SBIWTP discharge through the SBOO) to align sampling frequencies and analysis methods with the receiving water monitoring program in Order No. R9-2017-0007 (regulating the City’s PLOO discharge) to provide consistency and efficiency in the City’s management of the monitoring programs.

8. USIBWC has also requested that the San Diego Water Board add a footnote to Tables 5, E- 2, E-3, and F-14 in Order No. R9-2014-0009 to recognize the lack of an analytical test method for trivalent chromium and to allow the USIBWC to meet the objective for chromium (III) as a total chromium objective.

9. Based on Findings 1 through 8 of this Order, the San Diego Water Board is amending Order No. R9-2014-0009 to incorporate the changes requested by USIBWC.

Legal Authorities

10. Section 13263(e) of the California Water Code, provides that the San Diego Water Board may, upon application by any affected person, or on its own motion, review and revise waste discharge requirements. Section 122.62(a) of title 40 of the Code of Federal Regulations authorizes the reopening and modification of an NPDES permit based upon new information.

11. Order No. R9-2014-0009 is not being reopened for any other purpose than the revisions contained herein. Except as contradicted or superseded by the findings and directives set forth in this Order, all of the previous findings and directives of Order No. R9-2014-0009, as amended by Order No. R9-2014-0094, shall remain in full force and effect.

1 Health Effects Notebook for Hazardous Air Pollutants, Chromium Compounds, Summary created in April

1992, updated in January 2000, available at https://www.epa.gov/sites/production/files/2016- 09/documents/chromium-compounds.pdf https://www.epa.gov/sites/production/files/2016-09/documents/chromium-compounds.pdf https://www.epa.gov/sites/production/files/2016-09/documents/chromium-compounds.pdf

U.S. Section of the AMENDING ORDER NO. R9-2017-0024 International Boundary And Water Commission NPDES NO. CA0108928 South Bay International Wastewater Treatment Plant

California Environmental Quality Act

12. This action is exempt from the requirement of preparation of environmental documents under the California Environmental Quality Act (Public Resources Code, division 13, chapter 3, section 21000 et seq.) in accordance with section 13389 of the Water Code.

Public Participation

13. The San Diego Water Board has notified all known interested parties of its intent to adopt this Order.

14. The San Diego Water Board in a public meeting heard and considered all comments pertaining to adoption of this Order.

15. Any person aggrieved by this action of the San Diego Water Board may petition the State

Water Board to review the action in accordance with Water Code section 13320 and California Code of Regulations, title 23, sections 2050 et seq. The State Water Board must receive the petition by 5:00 p.m., 30 days after the adoption date of this Order. Copies of the law and regulations applicable to filing petitions may be found on the Internet at:

http://www.waterboards.ca.gov/public_notices/petitions/water_quality or will be provided upon request.

http://www.waterboards.ca.gov/public_notices/petitions/water_quality

U.S. Section of the International Boundary And Water Commission South Bay International Wastewater Treatment Plant

AMENDING ORDER NO. R9-2017-0024

NPDES NO. CA0108928

IT IS HEREBY ORDERED:

1. This Order amends Order No. R9-2014-0009, NPDES No. CA0108928, as described in the revised version included as Attachment 1 to this Order. Added text to Order No. R9-2014- 0009 is displayed in red-underline text and deleted text is displayed as Feel stFikee1::1t text.

Modifications to Order No. R9-2014-0009 were made to the following sections:

Paae No. Section No.

6 throuah 10 Section IV.A.2, Table 5

B-2 Attachment B E-4 through E-6 Attachment E, Section II. Table E-1 E-7 through E-9 Attachment E, Section Il l.A, Table E-2

E-10 throuqh E-12 Attachment E, Section 11 1.B, Table E-3 E-14 throuah E-31 Attachment E, Section IV E-38 through E-39 Attachment E, Section VIII.B.3, Table E-11

E-42 Attachment E, Section VIII.D, Table E-12 F-27 throuah F-31 Attachment F, Section IV.C.4.q, Table F-14 F-41 through F-42 Attachment F, Section VII.A.2 F-42 through F-45 Attachment F, Section VII .B

2. The amended version of Order No. R9-2014-0009, included as Attachment 1 to this Order, shall become effective on December 13, 2017.

3. San Diego Water Board staff is directed to prepare and post a conformed copy of Order No.

R9-2014-0009, as amended by Order No. R9-2014-0094, incorporating the revisions made by this Order.

I, David W. Gibson, Executive Officer, do hereby certify that this Order is a full, true, and correct copy of an Order adopted by the Californ ia Regional Water Quality Control Board, San Diego Region, on December 13, 2017.

David W. Gibson Executive Officer

CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD

SAN DIEGO REGION

2375 Northside Drive, Suite 100, San Diego, CA 92108 619-516-1990 Fax 619-516-1994 http://www.waterboards.ca.gov/sandiego/

ORDER NO. R9-2014-0009

AS AMENDED BY ORDER NOS. R9-2014-0094 and R9-2017-0024

NPDES NO. CA0108928

WASTE DISCHARGE REQUIREMENTS

FOR THE UNITED STATES SECTION OF THE

INTERNATIONAL BOUNDARY AND WATER COMMISSION,

SOUTH BAY INTERNATIONAL WASTEWATER TREATMENT PLANT,

DISCHARGE TO THE PACIFIC OCEAN VIA THE SOUTH BAY OCEAN OUTFALL

The following Discharger is subject to waste discharge requirements (WDR’s) set forth in this Order:

Table 1. Discharger Information Discharger United States Section of the International Boundary and Water Commission (USIBWC) Name of Facility South Bay International Wastewater Treatment Plant

Facility Address 2995 Clearwater Way San Diego, CA 92154 San Diego County

Table 2. Discharge Location

Table 3. Administrative Information This Order was adopted on: June 26, 2014 This Order shall become effective on: August 1, 2014 This Order shall expire on: July 31, 2019 The Discharger shall file a Report of Waste Discharge as an application for reissuance of WDR’s in accordance with title 23, California Code of Regulations, and an application for reissuance of a National Pollutant Discharge Elimination System (NPDES) permit no later than:

180 days prior to the Order expiration date

The U.S. Environmental Protection Agency (USEPA) and the California Regional Water Quality Control Board, San Diego Region have classified this discharge as follows: Major

I, David W. Gibson, Executive Officer, do hereby certify that this Order with all attachments is a full, true, and correct copy of the Order adopted by the California Regional Water Quality Control Board, San Diego Region, on June 26, 2014, and amended on November 12, 2014.

David W. Gibson, Executive Officer

Discharge Point No. Effluent Description Discharge Point

Latitude (North) Discharge Point Longitude (West)

Receiving Water

001 Secondary treated wastewater 32º 32’ 15” N 117º 11’ 00” W Pacific Ocean

Attachment 1 to Order No. R9-2017-0024

U.S. Section of the International Boundary And Water Commission Order No. R9-2014-0009 South Bay International Wastewater Treatment Plant As Amended by Order No. R9-2014-0094

NPDES No. CA0108928

ORDER PAGE 2

Contents I. Facility Information II. Findings III. Discharge Prohibitions IV. Effluent Limitations and Discharge Specifications

A. Effluent Limitations and Performance Goals – Discharge Point No. 001

1. Final Effluent Limitations – Discharge Point No. 001

2. Performance Goals – Discharge Point No. 001

3. Interim Effluent Limitations - Not Applicable

B. Land Discharge Specifications – Not Applicable C. Recycling Specifications – Not Applicable

V. Receiving Water Limitations A. Surface Water Limitation B. Groundwater Limitations – Not Applicable

VI. Provisions A. Standard Provisions B. Monitoring and Reporting Program (MRP) Requirements C. Special Provisions

1. Reopener Provisions

2. Special Studies, Technical Reports and Additional Monitoring Requirements

3. Best Management Practices and Pollution Prevention – Not Applicable

4. Construction, Operation and Maintenance Specifications – Not Applicable

5. Special Provisions for Municipal Facilities (Wastewater Facilities Only)

6. Other Special Provisions - Responsibilities, Liabilities, Legal Action, Penalties – Not

Applicable

7. Compliance Schedules – Not Applicable

VII. Compliance Determination

Tables Table 1. Discharger Information Table 2. Discharge Location Table 3. Administrative Information Table 4. Effluent Limitations at EFF-0011 Table 5. Performance Goals1 Table 6. Sharing Transboundary Wastewater Information with Mexico Table 7. Interim Influent Limitations Table 8. Sharing Pretreatment Information with Mexico

Attachments Attachment A – Abbreviations and Glossary ........................................................................................ A-1 Attachment B – Map ............................................................................................................................. B-1 Attachment C – Flow Schematic ........................................................................................................... C-1 Attachment D – Standard Provisions .................................................................................................... D-1 Attachment E – Monitoring and Reporting Program ............................................................................. E-1 Attachment F – Fact Sheet ................................................................................................................... F-1 Attachment G – Ocean Plan and Basin Plan Prohibitions .................................................................... G-1 Attachment H – Dilution Model Information .......................................................................................... H-1

NPDES No. CA0108928

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 3

I. FACILITY INFORMATION

General information about the South Bay International Wastewater Treatment Plant (Facility) is summarized in Table 1. More detailed information describing the Facility, five canyon collectors, two pump stations, the South Bay Land Outfall (SBLO), the South Bay Ocean Outfall (SBOO), and other associated infrastructure (collectively referred to as Facilities) is contained in sections I and II of the Fact Sheet (Attachment F). Section I of the Fact Sheet also includes information regarding the Discharger’s permit application.

II. FINDINGS

The California Regional Water Quality Control Board, San Diego Region (San Diego Water Board), finds:

A. Legal Authorities. This Order serves as WDR’s pursuant to article 4, chapter 4, division 7 of the California Water Code (commencing with section 13260). This Order is also issued pursuant to section 402 of the federal Clean Water Act (CWA) and implementing regulations adopted by the USEPA and chapter 5.5, division 7 of the Water Code (commencing with section 13370). It shall serve as an NPDES permit for point source discharges from this Facility to surface waters.

B. Background and Rationale for Requirements. The San Diego Water Board developed the requirements in this Order based on information submitted as part of the application, through monitoring and reporting programs, and other available information. The Fact Sheet (Attachment F), which contains background information and rationale for the requirements in this Order, is hereby incorporated into and constitutes Findings for this Order. Attachments A through E, G, and H are also incorporated into this Order.

C. Provisions and Requirements Implementing State Law. The provisions/requirements in subsections IV.B, IV.C, V.B, VI.A.2, VI.C.1.b, and VI.C.1.c are included to implement state law only. These provisions/requirements are not required or authorized under the federal CWA; consequently, violations of these provisions/requirements are not subject to the enforcement remedies that are available for NPDES violations.

D. Notification of Interested Parties. The San Diego Water Board has notified the Discharger and interested agencies and persons of its intent to prescribe WDR’s for the discharge and has provided them with an opportunity to submit their written comments and recommendations. Details of the notification are provided in the Fact Sheet (Attachment F).

E. Consideration of Public Comment. The San Diego Water Board, in a public meeting, heard and considered all comments pertaining to the discharge. Details of the Public Hearing are provided in the Fact Sheet (Attachment F).

NPDES No. CA0108928

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 4

THEREFORE, IT IS HEREBY ORDERED, that this Order supersedes Order No. 96-50 except for enforcement purposes, and, in order to meet the provisions contained in division 7 of the Water Code (commencing with section 13000) and regulations adopted thereunder, and the provisions of the CWA and regulations and guidelines adopted thereunder, the Discharger shall comply with the requirements in this Order. If any part of this Order is subject to a temporary stay of enforcement, unless otherwise specified in the order granting stay, the Discharger shall comply with the analogous portions of the previous Order. This action in no way prevents the San Diego Water Board from taking enforcement action for past violations of the previous Order.

III. DISCHARGE PROHIBITIONS

A. The discharge of waste from the Facilities to a location other than Discharge Point No. 001, unless specifically regulated by this Order or separate WDR’s, is prohibited.

B. The Discharger must comply with Discharge Prohibitions contained in the Water Quality Control Plan for Ocean Waters of California, California Ocean Plan (Ocean Plan), incorporated into this Order as if fully set forth herein and summarized in Attachment G, as a condition of this Order.

C. The Discharger must comply with Discharge Prohibitions contained in chapter 4 of the Water Quality Control Plan for the San Diego Basin (Basin Plan), incorporated into this Order as if fully set forth herein and summarized in Attachment G, as a condition of this Order.

IV. EFFLUENT LIMITATIONS AND DISCHARGE SPECIFICATIONS

A. Effluent Limitations and Performance Goals – Discharge Point No. 001

1. Final Effluent Limitations – Discharge Point No. 001

a. The Discharger shall maintain compliance with the following effluent limitations at

Discharge Point No. 001, with compliance measured at Monitoring Location EFF- 001 as described in the Monitoring and Reporting Program (Attachment E):

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 5

Table 4. Effluent Limitations at EFF-0011 Parameter Units1,2 Effluent Limitations1,3

Average Monthly

Average Weekly

Instantaneous Minimum

Instantaneous Maximum

Flow MGD 25 -- -- Carbonaceous

Biochemical Oxygen Demand (5-Day at

20°C) (CBOD5)

mg/L 25 40 --lbs/day 5,213 8,340

Total Suspended Solids

(TSS)

mg/L 30 45 --lbs/day 6,255 9,383 --

Oil and Grease mg/L 25 40 75 lbs/day 5,213 8,340 15,012

Settleable Solids mL/L 1.0 1.5 3.0 Turbidity NTU 75 100 225 pH standard units -- -- 6.0 9.0

BASED ON OCEAN PLAN OBJECTIVES FOR PROTECTION OF MARINE AQUATIC LIFE

6-Month Median

Maximum Daily

Instantaneous Minimum

Instantaneous Maximum

Mercury, Total Recoverable µg/L 3.78E+00 1.52E+01 3.82E+01 lbs/day 7.87E-01 3.18E+00 7.96E+00

Zinc, Total Recoverable µg/L 1.16E+03 6.89E+03 -- 1.84E+04 lbs/day 2.41E+02 1.44E+03 -- 3.83E+03

Chronic Toxicity TUc -- 95.6 -- -- Acute Toxicity TUa -- 3.2 -- --

BASED ON OCEAN PLAN OBJECTIVES FOR PROTECTION OF HUMAN HEALTH

30-Day Average

Thallium, Total Recoverable µg/L 1.91E+02 lbs/day 3.99E+01

Tributyltin µg/L 1.34E-01 lbs/day 2.79E-02

Benzidine µg/L 6.60E-03 lbs/day 1.38E-03

Chlordane1 µg/L 2.20E-03 lbs/day 4.58E-04

Chlorodibromomethane (dibromochloromethane) µg/L 8.22E+02 lbs/day 1.71E+02

DDT1 µg/L 1.63E-02 lbs/day 3.39E-03

Heptachlor Epoxide µg/L 1.91E-03 lbs/day 3.99E-04

Hexachlorobenzene µg/L 2.01E-02 lbs/day 4.19E-03

PCBs1 µg/L 1.82E-03 lbs/day 3.79E-04

TCDD Equivalents1 µg/L 3.73E-07 lbs/day 7.77E-08

Toxaphene µg/L 2.01E-02 lbs/day 4.19E-03

1 See Attachment A for definitions of abbreviations and a glossary of common terms used in this Order.

NPDES No. CA0108928

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 6

2 The mass emission rate (MER) limit, in pounds per day, was calculated based on the following equation: MER (lb/day) = 8.34 x Q x C, where Q is the maximum allowable flow rate (in MGD) and C is the concentration (in mg/L).

3 Scientific “E” notation is used to express certain values. In scientific “E” notation, the number following the “E” indicates the position of the decimal point in the value. Negative numbers after the “E” indicate that the value is less than 1, and positive numbers after the “E” indicate that the value is greater than 1. In this notation a value of 6.1E-02 represents 6.1 x 10-2 or 0.061, 6.1E+02 represents 6.1 x 102 or 610, and 6.1E+00 represents 6.1 x 100 or 6.1.

b. Percent Removal. The average monthly percent removal1 of CBOD5 and TSS shall not be less than 85 percent.

2. Performance Goals – Discharge Point No. 001 Parameters that do not have reasonable potential to cause or contribute to an exceedance of water quality objectives, or for which reasonable potential to cause or contribute to an exceedance of water quality objectives cannot be determined, are referred to as performance goal parameters and are assigned the performance goals listed in the following table. Performance goal parameters shall be monitored at Monitoring Location EFF-001 as described in the Monitoring and Reporting Program, Attachment E. The San Diego Water Board will use the results for informational purposes only, not compliance determinations.

Table 5. Performance Goals1

Parameter Unit1,2 Performance Goals1,3

6-Month Median

Maximum Daily

Instantaneous Maximum

30-Day Average

BASED ON OCEAN PLAN OBJECTIVES FOR PROTECTION OF MARINE AQUATIC LIFE

Arsenic, Total Recoverable µg/L 4.81E+02 2.78E+03 7.36E+03 --lbs/day 1.00E+02 5.79E+02 1.54E+03 --

Cadmium, Total Recoverable µg/L 9.56E+01 3.82E+02 9.56E+02 --lbs/day 1.99E+01 7.97E+01 1.99E+02 --

Chromium VI, Total Recoverable4 µg/L 1.91E+02 7.65E+02 1.91E+03 --lbs/day 3.99E+01 1.59E+02 3.99E+02 --

Copper, Total Recoverable µg/L 9.76E+01 9.58E+02 2.68E+03 --lbs/day 2.03E+01 2.00E+02 5.59E+02 --

Lead, Total Recoverable µg/L 1.91E+02 7.65E+02 1.91E+03 --lbs/day 3.99E+01 1.59E+02 3.99E+02 --

Nickel, Total Recoverable µg/L 4.78E+02 1.91E+03 4.78E+03 --lbs/day 9.97E+01 3.99E+02 9.97E+02 --

Selenium, Total Recoverable µg/L 1.43E+03 5.74E+03 1.43E+04 --lbs/day 2.99E+02 1.20E+03 2.99E+03 --

Silver, Total Recoverable µg/L 5.18E+01 2.53E+02 6.54E+02 --lbs/day 1.08E+01 5.27E+01 1.36E+02 --

1 See Attachment A for definitions of abbreviations and a glossary of common terms used in this Order.

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 7

Parameter Unit1,2

Performance Goals1,3 6-Month Median

Maximum Daily

Instantaneous Maximum

30-Day Average

Cyanide, Total Recoverable5 µg/L 9.56E+01 3.82E+02 9.56E+02 --lbs/day 1.99E+01 7.97E+01 1.99E+02 --

Total Chlorine Residual6 µg/L 1.91E+02 7.65E+02 5.74E+03 --lbs/day 3.99E+01 1.59E+02 1.20E+03 --

Ammonia (expressed as nitrogen) µg/L 5.74E+04 2.29E+05 5.74E+05 --lbs/day 1.20E+04 4.78E+04 1.20E+05 --

Phenolic Compounds (non-chlorinated)1 µg/L 2.87E+03 1.15E+04 2.87E+04 --lbs/day 5.98E+02 2.39E+03 5.98E+03 --

Chlorinated Phenolics1 µg/L 9.56E+01 3.82E+02 9.56E+02 --lbs/day 1.99E+01 7.97E+01 1.99E+02 --

Endosulfan1 µg/L 8.60E-01 1.72E+00 2.58E+00 --lbs/day 1.79E-01 3.59E-01 5.38E-01 --

Endrin µg/L 1.91E-01 3.82E-01 5.74E-01 --lbs/day 3.99E-02 7.97E-02 1.20E-01 --

HCH1

µg/L 3.82E-01 7.65E-01 1.15E+00 --lbs/day 7.97E-02 1.59E-01 2.39E-01 --

Radioactivity pCi/l

Not to exceed limits specified in title 17, division 1, chapter 5, subchapter 4, group 3, article 3, section 30253 of the California Code of Regulations, Reference to section 30253 is prospective, including future changes to any incorporated provisions of federal law, as the changes take effect.

BASED ON OCEAN PLAN OBJECTIVES FOR PROTECTION OF HUMAN HEALTH –

NONCARCINOGENS

Acrolein µg/L -- -- -- 2.10E+04 lbs/day -- -- -- 4.39E+03

Antimony, Total Recoverable µg/L -- -- -- 1.15E+05 lbs/day -- -- -- 2.39E+04

Bis(2-chloroethoxy) Methane µg/L -- -- -- 4.21E+02 lbs/day -- -- -- 8.77E+01

Bis(2-chloroisopropyl) Ether µg/L -- -- -- 1.15E+05 lbs/day -- -- -- 2.39E+04

Chlorobenzene µg/L -- -- -- 5.45E+04 lbs/day -- -- -- 1.14E+04 Chromium (III) , Total Recoverable4 µg/L -- -- -- 1.82E+07 lbs/day -- -- -- 3.79E+06

Di-n-butyl Phthalate µg/L -- -- -- 3.35E+05 lbs/day -- -- -- 6.98E+04

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 8

Dichlorobenzenes1 µg/L -- -- -- 4.88E+05 lbs/day -- -- -- 1.02E+05

Diethyl Phthalate µg/L -- -- -- 3.15E+06 lbs/day -- -- -- 6.58E+05

Dimethyl Phthalate µg/L -- -- -- 7.84E+07 lbs/day -- -- -- 1.63E+07

4,6-dinitro-2-methylphenol µg/L -- -- -- 2.10E+04 lbs/day -- -- -- 4.39E+03

2,4-dinitrophenol µg/L -- -- -- 3.82E+02 lbs/day -- -- -- 7.97E+01

Ethylbenzene µg/L -- -- -- 3.92E+05 lbs/day -- -- -- 8.17E+04

Fluoranthene µg/L -- -- -- 1.43E+03 lbs/day -- -- -- 2.99E+02 Hexachlorocyclopentadien e µg/L -- -- -- 5.54E+03 lbs/day -- -- -- 1.16E+03

Nitrobenzene µg/L -- -- -- 4.68E+02 lbs/day -- -- -- 9.77E+01

Toluene µg/L -- -- -- 8.13E+06 lbs/day -- -- -- 1.69E+06

1,1,1-trichloroethane µg/L -- -- -- 5.16E+07 lbs/day -- -- -- 1.08E+07

BASED ON OCEAN PLAN OBJECTIVES FOR PROTECTION OF HUMAN HEALTH -

CARCINOGENS

Acrylonitrile µg/L -- -- -- 9.56E+00 lbs/day -- -- -- 1.99E+00

Aldrin µg/L -- -- -- 2.10E-03 lbs/day -- -- -- 4.39E-04

Benzene µg/L -- -- -- 5.64E+02 lbs/day -- -- -- 1.18E+02 Beryllium, Total Recoverable µg/L -- -- -- 3.15E+00 lbs/day -- -- -- 6.58E-01

Bis(2-chloroethyl) Ether µg/L -- -- -- 4.30E+00 lbs/day -- -- -- 8.97E-01

Bis(2-ethlyhexyl) Phthalate µg/L -- -- -- 3.35E+02 lbs/day -- -- -- 6.98E+01

Carbon Tetrachloride µg/L -- -- -- 8.60E+01 lbs/day -- -- -- 1.79E+01

Chloroform µg/L -- -- -- 1.24E+04 lbs/day -- -- -- 2.59E+03

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 9

1,4-dichlorobenzene µg/L -- -- -- 1.72E+03 lbs/day -- -- -- 3.59E+02

3,3'-dichlorobenzidine µg/L -- -- -- 7.74E-01 lbs/day -- -- -- 1.61E-01

1,2-dichloroethane µg/L -- -- -- 2.68E+03 lbs/day -- -- -- 5.58E+02

1,1-dichloroethylene µg/L -- -- -- 8.60E+01 lbs/day -- -- -- 1.79E+01

Dichlorobromomethane µg/L -- -- -- 5.93E+02 lbs/day -- -- -- 1.24E+02 Dichloromethane (Methylene Chloride) µg/L -- -- -- 4.30E+04 lbs/day -- -- -- 8.97E+03

1,3-dichloropropene (1,3-Dichloropropylene) µg/L -- -- -- 8.51E+02 lbs/day -- -- -- 1.77E+02

Dieldrin µg/L -- -- -- 3.82E-03 lbs/day -- -- -- 7.97E-04

2,4-dinitrotoluene µg/L -- -- -- 2.49E+02 lbs/day -- -- -- 5.18E+01

1,2-diphenylhydrazine µg/L -- -- -- 1.53E+01 lbs/day -- -- -- 3.19E+00

Halomethanes1 µg/L -- -- -- 1.24E+04 lbs/day -- -- -- 2.59E+03 heptachlor µg/L -- -- -- 4.78E-03 lbs/day -- -- -- 9.97E-04

Hexachlorobutadiene µg/L -- -- -- 1.34E+03 lbs/day -- -- -- 2.79E+02

Hexachloroethane µg/L -- -- -- 2.39E+02 lbs/day -- -- -- 4.98E+01

Isophorone µg/L -- -- -- 6.98E+04 lbs/day -- -- -- 1.46E+04

N-nitrosodimethylamine µg/L -- -- -- 6.98E+04 lbs/day -- -- -- 1.46E+04

N-nitrosodi-N-propylamine µg/L -- -- -- 3.63E+01 lbs/day -- -- -- 7.57E+00

N-nitrosodiphenylamine µg/L -- -- -- 2.39E+02 lbs/day -- -- -- 4.98E+01

PAH1

µg/L -- -- -- 8.41E-01 lbs/day -- -- -- 1.75E-01

1,1,2,2-tetrachloroethane µg/L -- -- -- 2.20E+02 lbs/day -- -- -- 4.58E+01

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 10

Tetrachloroethylene (Tetrachloroethene) µg/L -- -- -- 1.91E+02 lbs/day -- -- -- 3.99E+01

Trichloroethylene (Trichloroethene) µg/L -- -- -- 2.58E+03 lbs/day -- -- -- 5.38E+02

1,1,2-trichloroethane µg/L -- -- -- 8.99E+02 lbs/day -- -- -- 1.87E+02

2,4,6-trichlorophenol µg/L -- -- -- 2.77E+01 lbs/day -- -- -- 5.78E+00

Vinyl Chloride µg/L -- -- -- 3.44E+03 lbs/day -- -- -- 7.18E+02 1 See Attachment A for definitions of abbreviations and a glossary of common terms used in this Order.

2 The mass emission rate (MER) limit, in pounds per day, was calculated based on the following equation: MER

(lb/day) = 8.34 x Q x C, where Q is the maximum allowable flow rate (in MGD) and C is the concentration (in mg/L).

3 Scientific “E” notation is used to express certain values. In scientific “E” notation, the number following the “E” indicates that position of the decimal point in the value. Negative numbers after the “E” indicate that the value is less than 1, and positive numbers after the “E” indicate that the value is greater than 1. In this notation a value of 6.1E-02 represents 6.1 x 10-2 or 0.061, 6.1E+02 represents 6.1 x 102 or 610, and 6.1E+00 represents 6.1 x 100 or 6.1.

4 The Discharger may, at its their option, meet this limitation (or apply this performance goal) as a total chromium limitation (or performance goal).

5 If a Discharger can demonstrate to the satisfaction of the San Diego Water Board (subject to USEPA approval) that an analytical method is available to reliably distinguish between strongly and weakly complexed cyanide, effluent limitations for cyanide may be met by (or performance goals may be evaluated with) the combined measurement of free cyanide, simple alkali metals cyanides, and weakly complexed organometallic cyanide complexes. In order for the analytical method to be acceptable, the recovery of free cyanide from metal complexes must be comparable to that achieved by the approved method in title 40 Code of Federal Regulations (CFR) part 136, as revised May 14, 1999.

6 The water quality objectives for total chlorine residual applicable to intermittent discharges not exceeding two hours, shall be determined through the use of the following equation:

log y = -0.43 (log x) + 1.8, where y = the water quality objective (in µg/l) to apply when chlorine is being discharged;

x = the duration of uninterrupted chlorine discharge in minutes.

Actual effluent limitations for total chlorine, when discharging intermittently, shall then be determined according to Implementation Procedures for Table 1 from the Ocean Plan, using a minimum probable initial dilution factor of 94.6 and a flow rate of 25 MGD.

3. Interim Effluent Limitations - Not Applicable

B. Land Discharge Specifications – Not Applicable C. Recycling Specifications – Not Applicable

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 11

V. RECEIVING WATER LIMITATIONS

A. Surface Water Limitation

The receiving water limitations set forth below for ocean waters are based on water quality objectives contained in the Basin Plan and Ocean Plan and are a required part of this Order.

The discharge of waste shall not cause or contribute to violation of these limitations in the Pacific Ocean. Compliance with these limitations shall be determined from samples collected at stations representative of the area within the waste field where initial dilution is completed.

1. Bacterial Characteristics

a. Within a zone bounded by the shoreline and a distance of three nautical miles from the shoreline, including all kelp beds, the following bacterial objectives shall be maintained throughout the water column. The zone of initial dilution for the ocean outfall is excluded.

i. 30-day Geometric Mean – The following standards are based on the geometric mean of the five most recent samples from each site:

a) Total coliform density shall not exceed 1,000 per 100 mL;

b) Fecal coliform density shall not exceed 200 per 100 mL; and

c) Enterococcus density shall not exceed 35 per 100 mL.

ii. Single Sample Maximum:

a) Total coliform density shall not exceed 10,000 per 100 mL;

b) Fecal coliform density shall not exceed 400 per 100 mL;

c) Enterococcus density shall not exceed 104 per 100 mL; and

d) Total coliform density shall not exceed 1,000 per 100 mL when the fecal coliform/total coliform ratio exceeds 0.1.

b. The Initial Dilution Zone of wastewater outfall shall be excluded from designation as kelp beds for purposes of bacterial standards. Adventitious assemblages of kelp plants on waste discharge structures (e.g., outfall pipes and diffusers) do not constitute kelp beds for purposes of bacterial standards.

c. At all areas where shellfish may be harvested for human consumption, as determined by the San Diego Water Board, the median total coliform density shall not exceed 70 per 100 mL throughout the water column, and not more than 10 percent of the samples shall exceed 230 per 100 mL.

2. Physical Characteristics

a. Floating particulates and grease and oils shall not be visible.

b. The discharge of waste shall not cause aesthetically undesirable discoloration of the ocean surface.

c. Natural light shall not be significantly reduced at any point outside the initial dilution zone as a result of the discharge of waste.

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 12

d. The rate of deposition of inert solids and the characteristics of inert solids in the ocean sediments shall not be changed such that benthic communities are degraded.

3. Chemical Characteristics

a. The dissolved oxygen concentration shall not at any time be depressed more than

10 percent from that which occurs naturally, as the result of the discharge of oxygen demanding waste materials.

b. The pH shall not be changed at any time more than 0.2 units from that which occurs naturally.

c. The dissolved sulfide concentration of waters in and near sediments shall not be significantly increased above that present under natural conditions.

d. The concentration of substances set forth in Chapter II, Table 1 of the Ocean Plan, shall not be increased in marine sediments to levels that would degrade indigenous biota.

e. The concentration of organic materials in marine sediments shall not be increased to levels that would degrade marine life.

f. Nutrient materials shall not cause objectionable aquatic growths or degrade indigenous biota.

g. Numerical water quality objectives established in Chapter II, Table 1 of the Ocean Plan apply to all discharges within the jurisdiction of the Ocean Plan. Unless otherwise specified, all metal concentrations are expressed as total recoverable concentrations.

4. Biological Characteristics

a. Marine communities, including vertebrate, invertebrate, and plant species, shall not be degraded.

b. The natural taste, odor, color of fish, shellfish, or other marine resources used for human consumption shall not be altered.

c. The concentration of organic materials in fish, shellfish, or other marine resources used for human consumption shall not bioaccumulate to levels that are harmful to human health.

5. Radioactivity Discharge of radioactive waste shall not degrade marine life.

B. Groundwater Limitations – Not Applicable

VI. PROVISIONS

A. Standard Provisions

1. The Discharger shall comply with all Standard Provisions included in Attachment D of this Order.

2. The Discharger shall comply with the following provisions. In the event that there is any conflict, duplication, or overlap between provisions specified by this Order, the more stringent provision shall apply.

a. The Facility shall be supervised and operated by persons possessing certificates of appropriate grade pursuant to title 23, division 3, chapter 26 of the California Code

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 13

of Regulations (CCR). The Facility shall be provided with a sufficient number of qualified personnel to operate the Facility effectively so as to achieve the required level of treatment at all times.

b. All proposed new treatment facilities and expansions of existing treatment facilities shall be completely constructed and operable prior to initiation of the discharge from the new or expanded facilities. The Discharger shall submit a certification report for each new canyon collector, treatment facility, expansion of an existing treatment facility, and design capacity re-ratings. The certification report shall be prepared by the design engineer. For design capacity re-ratings, the certification report shall be prepared by the engineer who evaluated the treatment facility design capacity. The signature and engineering license number of the engineer preparing the certification report shall be affixed to the report. If reasonable, the certification report shall be submitted prior to beginning construction.

i. The certification report shall:

a) Identify the design capacity of the treatment facility, including the daily and 30-day design capacity;

b) Certify the adequacy of each component of the treatment facility; and

c) Contain a requirement-by-requirement analysis, based on acceptable engineering practices, of the process and physical design of the facility to ensure compliance with this Order.

ii. The Discharger shall not initiate a discharge from an existing treatment facility at a daily flow rate in excess of its previously approved design capacity until:

a) The certification report is received by the San Diego Water Board;

b) The San Diego Water Board has received written notification of completion of construction (new treatment facilities and expansions only);

c) An inspection of the facility has been made by the San Diego Water Board or its designated representatives (new treatment facilities and expansions only); and

d) The San Diego Water Board has provided the Discharger with written authorization to discharge at a daily flow rate in excess of its previously approved design capacity.

c. All waste treatment, containment, and disposal facilities shall be protected against 100-year peak stream flows as defined by the San Diego County flood control agency.

d. All waste treatment, containment, and disposal facilities shall be protected against erosion, overland runoff, and other impacts resulting from a 100-year, 24-hour storm event.

e. This Order expires on July 31, 2019, after which, the terms and conditions of this permit are automatically continued pending issuance of a new permit, provided that all requirements of USEPA’s NPDES regulations at 40 CFR section 122.6 and the

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 14

State’s regulations at title 23, division 3, chapter 9, article 3, section 2235.4 of the CCR regarding the continuation of expired permits and waste discharge requirements are met.

f. A copy of this Order shall be posted at a prominent location at or near the treatment and disposal facilities and shall be available to operating personnel at all times.

B. Monitoring and Reporting Program (MRP) Requirements The Discharger shall comply with the MRP, and future revisions thereto, in Attachment E of this Order.

C. Special Provisions

1. Reopener Provisions

a. This Order may be reopened for modification to include an effluent limitation if monitoring establishes that the discharge causes, has the reasonable potential to cause, or contributes to an excursion above a performance goal(s) set forth in section IV.A.2, Table 5, of this Order or as otherwise described in Ocean Plan Table

1. (40 CFR section 122.44(d)(1))

b. This Order may be reopened for modification of the monitoring and reporting requirements and/or special studies requirements, at the discretion of the San Diego Water Board. Such modification(s) may include, but is (are) not limited to, revision(s)

(i) to implement recommendations from Southern California Coastal Water Research Project (SCCWRP), (ii) to develop, refine, implement, and/or coordinate a regional monitoring program, (iii) to develop and implement improved monitoring and assessment programs in keeping with San Diego Water Board Resolution No.

R9-2012-0069, Resolution in Support of a Regional Monitoring Framework, and/or

(iv) to add provisions to require the Discharger to evaluate and provide information on cost and values of the monitoring and reporting program.

c. This Order may be modified, revoked and reissued, or terminated for cause including, but not limited to, the following:

i. Violation of any terms or conditions of this Order. (Water Code section 13381(a))

ii. Obtaining this Order by misrepresentation or failure to disclose fully all relevant facts. (Water Code section 13381(b))

iii. A change in any condition that requires either a temporary or permanent reduction or elimination of the permitted discharge. (Water Code section 13381(c))

d. The filing of a request by the Discharger for modifications, revocation and reissuance, or termination of this Order does not stay any condition of this Order.

Notification by the Discharger of planned operational or facility changes or anticipated noncompliance with this Order does not stay any condition of this Order.

(40 CFR section 122.41(f))

e. If any applicable toxic effluent standard or prohibition (including any schedule of compliance specified in such effluent standard or prohibition) is promulgated under section 307(a) of the CWA for a toxic pollutant and that standard or prohibition is more stringent than any limitation on the pollutant in this Order, the San Diego Water Board may institute proceedings under these regulations to modify or revoke

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 15

and reissue the Order to conform to the toxic effluent standard or prohibition. (40 CFR section 122.4(b)(1))

f. This Order may be reopened and modified, in accordance with the provisions set forth in 40 CFR parts 122 and 124.

g. This Order may be reopened and modified to revise effluent limitations as a result of future Basin Plan Amendments, or the adoption of a total maximum daily load (TMDL) for the receiving water. (40 CFR section 122.62(a)(2))

h. This Order may be reopened upon submission by the Discharger of adequate information, as determined by the San Diego Water Board, to provide for dilution credits or a mixing zone, as may be appropriate. (40 CFR section 122.62(a)(2))

i. This Order may also be reopened and modified, revoked and, reissued or terminated in accordance with the provisions of 40 CFR sections 122.44, 122.62 to 122.64, and 125.62. Causes for taking such actions include, but are not limited to, failure to comply with any condition of this Order and permit, and endangerment to human health or the environment resulting from the permitted activity.

2. Special Studies, Technical Reports and Additional Monitoring Requirements

a. Spill and Transboundary Wastewater Flow Event Prevention and Response

Plan.

i. Spill and Transboundary Wastewater Flow Event Types. For purposes of section VI.C.2, spill and transboundary wastewater flow event types are defined and categorized as set forth below. Event types do not include waste discharges to the Pacific Ocean at SBOO Discharge Point No. 001 or discharges of waste from the Facilities specifically regulated by separate waste discharge requirements or an NPDES permit.

a) Spill from the Facilities (Facilities Spill Event). A discharge of treated or untreated wastewater or other material to the environment that occurs from the Discharger’s Facilities, including, but not limited to, the entire wastewater conveyance, storage, treatment, and disposal system (wastewater system) that is owned and operated by the Discharger. The wastewater system includes all devices and system components used such as pipes, pump stations, force mains, Junction Box 1, Junction Box 2, the five canyon collector systems, the treatment works, SBLO, and SBOO.

b) Transboundary Wastewater Flow Past the Canyon Collector System (Flow Event Type A). A dry weather transboundary treated or untreated wastewater or other flow through a conveyance structure owned and operated by the United States Government into Smuggler Gulch, Goat Canyon, Canyon del Sol, Stewart’s Drain, or Silva Drain and not diverted into the canyon collector system for treatment at the Facility.

c) Transboundary Wastewater Flow Event or Other Spill/Wastewater Flow Event in Mexico (Flow Event Type B). A dry weather spill or dry weather transboundary wastewater or other flow (not categorized in other Event Types above) that creates, or threatens to create, pollution or nuisance conditions in waters of the United States and/or State including the Tijuana River (main channel), Yogurt Canyon drainage, other unnamed

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 16

drainages and nearby coastal marine waters. These spills or transboundary flows include, but are not limited to the following:

1) A dry weather transboundary treated or untreated wastewater flow in waters of the Tijuana River (main channel) as described in Commitment No. 16 of IBWC Minute No. 283 (Conceptual Plan for the International Solution to the Border Sanitation Problem in San Diego, California/Tijuana, Baja California, July 2, 1990).

2) A dry weather transboundary treated or untreated wastewater flow through a conveyance structure owned and operated by the United States Government into Yogurt Canyon.

3) Spills or wastewater flows occurring in Mexico that the Discharger has knowledge of.

ii. Development and Submittal. The Discharger shall prepare and submit a Spill and Transboundary Wastewater Flow Prevention and Response Plan (Prevention/Response Plan) to the San Diego Water Board, via the State Water Board’s California Integrated Water Quality System (CIWQS) Program Web site, no later than 180 days after the adoption of this Order. The Prevention/Response Plan shall be developed in consultation with the Comisión Internacional de Limites y Aguas (CILA, the Mexican Section of the IBWC), the San Diego Water Board, the County of San Diego Department of Environmental Health (DEH), and other interested stakeholders. At a minimum, the Prevention/Response Plan shall address the three types of events identified above in section VI.C.2.a.i of this Order and shall include the following elements:

a) Goal. The goal of the Prevention/Response Plan shall be described and consistent with the following criteria:

1) Reduce, eliminate and prevent the recurrence of spills and transboundary wastewater flows;

2) Protect public health and safety; and

3) Prevent adverse impacts to the environment from spills and transboundary wastewater flows, including but not limited to, adverse impacts to waters of the United States and/or State.

b) Desired Outcomes. The Prevention/Response Plan shall be consistent with the following desired outcomes:

1) Prompt notification and reporting of spills and transboundary wastewater flows to appropriate regulatory agencies, municipalities, and other potentially affected entities is ensured;

2) Effective measures are identified, documented and implemented to prevent, reduce, and eliminate spills and transboundary wastewater flows;

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 17

3) Compliance with the requirements of this Order is achieved and maintained;

4) Effective remedial measures are implemented to 1) control or limit the spill and/or transboundary wastewater flow volume, 2) terminate the spill and/or transboundary wastewater flow, and 3) recover as much of the spill and/or transboundary wastewater flow volume as possible for proper disposal, including any wash down water; and

5) A framework for binational actions and cooperation in achieving the goals and desired outcomes of the Prevention/Response Plan is established and followed by the Discharger and CILA and the following agencies to the extent that these agencies are willing and able to participate, Secretaría de Protección al Ambiente (SPA), Comisión Estatal de Servicios Públicos de Tijuana (CESPT), Procuraduría Federal de Protección al Ambiente (PROFEPA), Comisión Nacional del Agua (CONAGUA), and the City of Tijuana’s Secretaría de Desarrollo Urbano y Ecología (SDUE).

c) Roles and Responsibilities. The Prevention/Response Prevention/Response Plan shall:

1) Identify the duly authorized individual(s) or position(s) having overall responsibility for the development and implementation of the Prevention/Response Plan on behalf of the Discharger as described in Attachment D of this Order, Special Provisions, section V.B;

2) Identify the names of all key individuals, associated position titles, e-mail addresses and telephone numbers, including management, administrative, contractor and maintenance positions, responsible for implementing specific measures described in the Prevention/Response Plan, on behalf of the Discharger; and

3) Provide a complete description of the roles and responsibilities, and lines of authority for implementation of the Prevention/Response Plan with respect to the Discharger, including organization chart(s) or similar document(s).

4) Provide a complete description of the roles and responsibilities, and lines of authority for implementation of the Prevention/Response Plan with respect to CILA, SPA, CESPT, PROFEPA, CONAGUA, and SDUE, including organization chart(s) or similar document(s) to the extent that they are available. The Discharger shall request in writing this information to assist the Discharger in implementing the Prevention/Response Plan. The Discharger shall include a copy of the request and CILA’s response to the request in the Prevention/Response Plan. If CILA refuses or does not confirm within one month, the Discharger shall communicate the same to the San Diego Water Board in writing in a timely manner.

LIMITATIONS AND DISCHARGE REQUIREMENTS PAGE 18

d) Communication and Coordination with Mexico. The Prevention/Response Plan shall document the framework and procedures for coordination between the Discharger, CILA, SPA, CESPT, the San Diego Water Board, and interested parties through regular meetings and written or oral communication to:

1) Develop procedures for reducing, eliminating, and preventing recurrence of transboundary wastewater flows resulting from an emergency or unanticipated outages of wastewater infrastructure on either side of the international border;

2) Develop binational emergency response and notification procedures for loss of wastewater infrastructure capacity on either side of the international border;

3) Review existing plans, specifications and reports of key wastewater infrastructure on both sides of the international border;

4) Assist CILA and local agencies in Mexico, as requested by these entities through IBWC, in preventing, reducing, terminating, and recovering transboundary wastewater flows;

5) Provide a framework for binational actions and cooperation…