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E.W. Blom Point Loma Wastewater Treatment Plant

Southern California Bight

Point Loma Ocean Outfall

Point Loma kelp beds

• City of San Diego• City of Chula Vista• City of Coronado• City of Del Mar• City of El Cajon• City of Imperial Beach• City of La Mesa• City of National City• City of Poway• Otay Water District• Padre Dam MWD• Lemon Grove SD• San Diego County

Disinfection

301(h) waiver for Point Loma WWTP

Peter Kozelka, USEPAWater Division

TSS BOD301(h) criteria

• must < 75 mg/L conc. • must ≥ 80% removal

• must ≥ 58% removal

Facility performance• 25-50 mg/L (mos. avg.)• 90% removal

• 65-68% removal

Secondary treatment level• meet 30 mg/L • 85% removal

• meet 30 mg/L • 85% removal

CWA 301(h) Criteria

• Adequately remove toxics prior to WWTP– City has effective pretreatment program

• Adequate effluent and ocean monitoring– City has extensive monitoring program–many

parameters in water(s), sediment and fish– Robust data set over 2 decades

OPRA requires reuse program

Monitoring Near

Pt. Loma OceanOutfall

Sediment chemistry (’95-’15)

0

0.05

0.1

0.15

0.2

0.25

B-12 B-9 E-26 E-25 E-23 E-20 E-17 E-14 E-11 E-8 E-5 E-2

Nitrogen total (mg/kg) 199192

93

94

95

96

97

98

99

00

01

02

03

04

05

0

200

400

600

800

1000

1200

B-12 B-9 E-26 E-25 E-23 E-20 E-17 E-14 E-11 E-8 E-5 E-2

BOD total (mg/kg)199192

93

94

95

96

97

98

99

00

01

02

03

04

05

Sediment chemistry (’95-’15)

0

20

40

60

80

100

120

140

160

180

200

B-12 B-9 E-26 E-25 E-23 E-20 E-17 E-14 E-11 E-8 E-5

Zinc total (mg/kg) 199192

93

94

95

96

97

98

99

00

01

02

03

04

0

5000

10000

15000

20000

25000

30000

35000

40000

45000

B-12 B-9 E-26 E-25 E-23 E-20 E-17 E-14 E-11 E-8 E-5 E-2

DDT total (ng/kg) 199192

93

94

95

96

97

98

99

00

01

02

03

04

05

Benthic Community (‘91-’13)(benthic response index values)

-5

0

5

10

15

20

25

30

35

40

45

1991

-319

92-1

1992

-319

93-1

1993

-319

94-1

1994

-319

95-1

1995

-319

96-1

1996

-319

97-1

1997

-319

98-1

1998

-319

99-1

1999

-320

00-1

2000

-320

01-1

2001

-320

02-1

2002

-320

03-1

2003

-320

04-1

2004

-320

05-1

2005

-320

06-1

2006

-320

07-1

2007

-320

08-1

2008

-320

09-1

2009

-320

10-1

2010

-320

11-1

2011

-320

12-1

2012

-320

13-1

2013

-3

BRI

BRI-B9 BRI-E14 BRI-E26Pre-discharge Post-discharge

Reference

Minor deviation from reference

Loss in biodiversity

Survey (1991-2013)

Fish tissue conc. (‘95-’13)

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014

ug/k

g, w

et w

eigh

t

Year

total PCB concentrations in rockfish muscle at 98 meter stations

RF-2

RF-1

Secondary Equivalency forTotal Suspended Solids

Current Mass Emission Limitation 13,598 metric tons/year (mt/yr)

Proposed Mass Emission Limitation 12,000 mt/yr (years 1-4)11,999 mt/yr (by year 5)

Mass Emission Goal for Year 20289,942 mt/yr

Mass Emission at full capacity and secondary standard

9,942 mt/yr

Mass Emissions Rate and Flow

Jan

2017

.

May

2017

.

Jan

2018

.

Mar

2018

.

Jan

2019

.

Oct

2019

.

Jan

2020

.

Dec

2023

.

Dec

2027

.

Dec

2035

.

Notice toProceed onFinal DesignConveyance To Reservoir

Notice toProceed onFinal Design15 MGDFacility

Final Program EIR &30% Design15 MGDFacility

30% DesignConveyance To Reservoir

60% Design15 MGDFacility

Complete Design15 MGDFacility

Complete DesignConveyance To Reservoir 15 MGD

Potable Reuse Water

30 MGDPotable Reuse Water

83 MGDPotable Reuse Water

Tasks in Timeframe Tentative OrderGoals Beyond Tentative Order

Water Quality-BasedEffluent Limitations

• Total Chlorine Residual• Chronic Toxicity• Aldrin

Effluent limitationscarried over


• Total Chlorine Residual• Chronic Toxicity• Aldrin - New effluent limitations


• Total Chlorine Residual• Chronic Toxicity• Aldrin• TCDD Equivalency Error:

No new effluent limitationKeep performance goal

Expanded Receiving Water Monitoring Program

Plume Tracking

Expanded Receiving Water Monitoring Program

Sediment Toxicity

Receiving Water Monitoring Reports

Current Reporting(6 reports every 2 years)

Proposed Reporting(2 reports every 2 years)

Annual Full Assessment• Point Loma Ocean Outfall• South Bay Ocean Outfall

(City of San Diego)• South Bay Ocean Outfall

(International Boundary and Water Commission)

Biennial Full Assessment• Point Loma Ocean Outfall and South Bay Ocean

Outfall

Interim Report/Executive Summary• Point Loma Ocean Outfall and South Bay Ocean

Outfall

Special Study – Climate Change

Oct 28, 2016: Public Notice/Tentative Documents

Dec 14, 2016: Joint Public Hearing

Dec 21, 2016: Comment Due on Tentative Documents

City of San Diego Comment Letter• Typographical errors and request

for clarification• Error on TCDD equivalency

reasonable potential analysis

Lemon Grove Sanitation District Comment Letter

• Support waiver• Support Pure Water San Diego

• Joint Adoption of Tentative Order by – USEPA and – San Diego Water Board

• Endangered Species Act consultation – US Fish and Wildlife Services and – National Marine Fishery Service

• Determination from– California Coastal Commission

• Final 301(h) Waiver Decision Document– USEPA Region 9 Administrator

Questions?