HomeMy WebLinkAbout09.b. Receive 2018 NPDES Annual Report Page 1 of 8
Item 9.b.
,ek CENTRAL SAN
SANITARYCENTRAL CONTRA COSTA , .
February 21, 2019
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 2018 NATIONAL POLLUTANT DISCHARGE ELIMINATION
SYSTEM (NPDES)ANNUAL REPORT
The 2018 National Pollutant Discharge Elimination System Annual Report was submitted to the California
Regional Water Quality Control Board, San Francisco Bay Section, on January 30, 2019.
Plant Operations Division Manager Alan Weer will present the highlights from the annual report.
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 21, 2019 Regular Board Meeting Agenda Packet- Page 66 of 111
2018 NATIONAL POLLUTANT
DISCHARGE ELIMINATION SYSTEM
r ANNUAL REPORT
7
Board of Directors Meeting
February 21 , 2019
Alan Weer
Plant Operations Division Manager
February 21, or Board Me - Pqne 67 nf 111 Slide 1
2018 NATIONAL POLLUTANT DISCHARGE
ELIMINATION SYSTEM ANNUAL REPORT
Total flow treated = 13. 1 billion gallons (16. 1 billion in 2017)
Average daily effluent flow = 34.7 million gallons
(44.0 million in 2017)
Average daily influent flow = 36.0 million gallons
(45. 1 million in 2017)
Peak hourly flow = 103 million gallons per day
(181 million in 2017)
; .: Ash disposal = 3,610 tons
(wet weight for soil amendment; 3,960 tons in 2016)
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Slide 2
February 21, 2019 Regular Board Meeting Age - -`-
2018 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
Slide 3 `
February 21. 2019 Regular Board Meeting Agenda Packet- Paae 69 of 111 ._
2018 NATIONAL POLLUTANT DISCHARGE
ELIMINATION SYSTEM ANNUAL REPORT
CBODmonthly average (mg/L) = 7.4 mg/L (Limit = 25 mg/L)
CBOD (% removal) = 96.6% (Limit = Minimum of 85%)
TSSmonthly average (mg/L) = 8. 1 mg/L (Limit = 30 mg/L)
TSS (% removal) = 97.0% (Limit = Minimum of 85%)
Entero (MPN/100ml) = 3 (Limit = Geometric Mean of < 35)
Bioassay (% survival) = 97.7% (Limit = 11 Sample Median > 90%)
Slide 4 `
February 21. 2019 Regular Board Meeting Agenda Packet- Paae 70 of 111 ._
2018 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 — 21St Consecutive Year
F.,.
Slide 5 `
'February`2 2019 Regular Board Meeting Agenda Parket- PaaP 71 nf 111 _._
ACKNOWLEDGEMENTS
Environmental Laboratory
Operations Department
Engineering Department
Administration Department
Board of Directors
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Slide 6
'February 21, 2019 Regular Board Meeting Age - =
COMMENDATION
Receive the 2018
National Pollutant Discharge
Elimination System Annual Annual Report
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Slide 7
February21, 2019 Regular Board Meeting Agenda Parket- PaaP 71 nf 111 :._