HomeMy WebLinkAbout08.a. Accept 2012 (NPDES) National Pollutant Discharge Elimination System Annual ReportCentral Contra Costa Sanitary District
' BOARD OF DIRECTORS
POSITION PAPER
Board Meeting Date: January 24, 2013
subject: BOARD ACCEPTANCE OF THE 2012 NATIONAL POLLUTANT
DISCHARGE ELIMINATION SYSTEM (NPDES) ANNUAL REPORT
Submitted By
Mary Lou Esparza
Laboratory Superintendent
Initiating Dept /Div.:
Plant Operations / Laboratory
REVIEWED AND RECOMMENDED FOR BOARD ACTION.
�, 6
M. parza D raig Curtis W. Swanson
Interim General
Manager
ISSUE: The Central Contra Costa Sanitary District's (District) 2012 National Pollutant
Discharge Elimination System (NPDES) Annual Report has been prepared for
submission to the California Regional Water Quality Control Board (RWQCB),
San Francisco Bay Section. This annual report is presented to the Board of Directors'
for information and acceptance. The Sewer System Overflow and Recycled Water
Annual Reports will be submitted separately at later dates.
RECOMMENDATION: Accept the 2012 NPDES Annual Report.
FINANCIAL IMPACTS: None
ALTERNATIVES /CONSIDERATIONS: None
BACKGROUND: During 2012, the treatment plant received a total of 13.7 billion
gallons of wastewater, which equates to an average flow of 37.6 million gallons per day.
This average flow is approximately 4.8 percent lower than in 2011. The treatment plant
produced an effluent with annual average carbonaceous biochemical oxygen demand
(C -BOD) and total- suspended solids (TSS) concentrations of 6 mg /L and 8 mg /L,
respectively. These concentrations are markedly lower than our NPDES permit
standards of 25 mg /L and 30 mg /L, respectively. Both C -BOD and TSS removal
efficiency for the treatment plant averaged 97 percent. Solids disposal during the year
involved the incineration of dewatered sludge in the District's multiple -hearth furnaces.
Approximately 3,657 tons of furnace ash was produced. The ash met regulatory
requirements for final disposal throughout the year.
More than 15,000 tests were completed to comply with the NPDES permit. The
treatment plant effluent met all (100 percent) of the NPDES permit requirements
throughout the year, which makes this the fifteenth consecutive year of full compliance.
N: \POSUP \Board of Directors \Board - Position Papers\2013 \NPDES Annual Report 01- 24- 13.doc
�M'
POSITION PAPER
Board Meeting Date: January 24, 2013
subject. BOARD ACCEPTANCE OF THE 2012 NATIONAL POLLUTANT
DISCHARGE ELIMINATION SYSTEM (NPDES) ANNUAL REPORT
The District's NPDES permit requires the annual report to have four content areas that
cover the following:
• A comprehensive discussion of treatment plant performance and compliance
with the permit. This includes a statement about all projects that were completed
to improve performance and reliability of the District's wastewater treatment,
collection and disposal practices in 2012.
• List of Approved Analyses.
• Plant schematic.
• Annual review of Facility Reports.
Additionally, the District has compiled yearly totals, averages, maximum and minimum
values for influent, final effluent, sludge, and receiving water quality parameters for
Board review and District staff use. This information has been submitted to the
RWQCB electronically and is not a required component of the annual report.
Upon acceptance of this annual report by the District Board of Directors, it will be
submitted to the RWQCB. The NPDES permit requires the annual report be submitted
to the RWQCB by February 1, 2013.
RECOMMENDED BOARD ACTION: Accept the 2012 National Pollutant Discharge
Elimination System Annual Report.
NAPOSUP \Board of Directors \Board - Position Papers\2013 \NPDES Annual Report 01- 24- 13.doc