HomeMy WebLinkAbout13.a. Receive 2019 National Pollutant Discharge Elimination System (NPDES) Annual Report Page 1 of 5
Item 43.a.
k�*k CENTRAL SAN
CENTRAL CONTRA COSTA SANITARY DISTRICT
February 20, 2020
TO: HONORABLE BOARD OF DIRECTORS
FROM: ALAN WEER, PLANT OPERATIONS DIVISION MANAGER
REVIEWED BY: ANN SASAKI, DEPUTY GENERAL MANAGER
ROGER S. BAILEY GENERAL MANAGER
SUBJECT: RECEIVE THE 2019 NATIONAL POLLUTANT DISCHARGE ELIMINATION
SYSTEM (NPDES)ANNUAL REPORT
The 2019 National Pollutant Discharge Elimination System (NPDES)Annual Report was submitted to the
California Regional Water Quality Control Board, San Francisco Bay Section, on January 30, 2020.
Plant Operations Division Manager Alan Weer will present the highlights from the annual report.
Strategic Plan Tie-In
GOAL TWO: Strive to Meet Regulatory Requirements
Strategy 1 - Strive to achieve 100%permit compliance in air, water, land, and other regulations
ATTACHMENTS:
1. Presentation
February 20, 2020 Regular Board Meeting Agenda Packet- Page 93 of 161
Page 2 of 5
2019 NATIONAL POLLUTANT
DISCHARGE ELIMINATION SYSTEM
ANNUAL REPORT
Board of Directors Meeting
February 20, 2020
:- Alan Weer
Plant Operations Division Manager
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2019 NATIONAL POLLUTANT DISCHARGE
ELIMINATION SYSTEM ANNUAL REPORT
Total flow treated = 15.1 billion gallons (13.1 billion in 2018)
Average daily effluent flow= 38.6 million gallons
(34.7 million in 2018)
Average daily influent flow=41.2 million gallons
(36.0 million in 2018)
Peak hourly flow= 174 million gallons per day
(103 million in 2018)
Ash disposal = 3,514 tons
(wet weight for soil amendment; 3,610 tons in 2018)
February 20, 2020 Regular Board Meeting Agenda Packet- Page 94 of 161
Page 3 of 5
2019 NATIONAL POLLUTANT DISCHARGE
ELIMINATION SYSTEM ANNUAL REPORT
BOD/CBOD—Carbonaceous Biochemical Oxygen Demand
A measure of oxygen used by microorganisms
Entero—Enterococci
A measure of bacteria
TSS—Total Suspended Solids
A measure of suspended particles
Bioassay
A measure for evaluating the potential harmful effects of effluents
discharged into surface waters
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2019 NATIONAL POLLUTANT DISCHARGE
ELIMINATION SYSTEM ANNUAL REPORT
CBODmonthiy average(mg/L)= 7.1 mg/L (Limit=25 mg/L)
CBOD (% removal) = 96.4% (Limit= Minimum of 85%)
TSSmonthiy average(mg/L) = 7.9 mg/L (Limit= 30 mg/L)
TSS (% removal) = 96.6% (Limit= Minimum of 85%)
Entero (MPN/100ml) =4 (Limit= Geometric Mean of< 35)
Bioassay (11 Sample Median Average) = 99.4% (Limit= 11 Sample
Median > 90%)
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February 20, 2020 Regular Board Meeting Agenda Packet- Page 95 of 161
Page 4 of 5
2019 NATIONAL POLLUTANT DISCHARGE
ELIMINATION SYSTEM ANNUAL REPORT
Completed over 15,000 analytical tests
Approximately 11,000 hours of laboratory work
100 percent compliance with National Pollutant
Discharge Elimination System Permit requirements
NACWA Platinum Award — 22nd Consecutive Year
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ACKNOWLEDGEMENTS
Environmental Laboratory
Operations Department
Engineering Department
Administration Department
Board of Directors
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February 20, 2020 Regular Board Meeting Agenda Packet- Page 96 of 161
Page 5 of 5
RECOMMENDATION
Receive the 2019
National Pollutant Discharge
Elimination System Annual Report
February 20, 2020 Regular Board Meeting Agenda Packet- Page 97 of 161