HomeMy WebLinkAbout06.a. _Position Paper re 2014 NPDES Annual ReportCentral Contra Costa Sanitary District
BOARD OF DIRECTORS
POSITION PAPER
Board Meeting Date: February 5, 2015
Subject: 2014 NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES) ANNUAL REPORT
Submitted By.
Ann K. Sasaki, P.E.
Deputy General Manager
Initiating Dept. /Div.:
Operations /Laboratory
REVIEWED AND RECOMMENDED FOR BOARD ACTION:
M. Esparza — Laboratory Superintendent
R. Bailey
General Manag r
ISSUE: The Central Contra Costa Sanitary District's (District) 2014 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. The Sewer System Overflow and Recycled Water Annual Reports will
be submitted separately at later dates.
RECOMMENDATION: Receive the 2014 NPDES Annual Report.
FINANCIAL IMPACTS: None.
ALTERNATIVES /CONSIDERATIONS: Under the current NPDES Permit, the District is
required to submit an annual self- monitoring report to the RWQCB by February 1, 2015.
BACKGROUND: During 2014, the Treatment Plant received a total of 12.7 billion
gallons of wastewater, which equates to an average flow of 35.6 million gallons per day.
The Treatment Plant produced an effluent with annual average carbonaceous
biochemical oxygen demand (C -BOD) and total- suspended solids (TSS) concentrations
of 5.3 mg /L and 6.2 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 and 98 percent
respectively. Solids disposal during the year involved the incineration of dewatered
sludge in the District's multiple -hearth furnaces. Approximately 4,010 tons of furnace
ash was produced. The ash met regulatory requirements for final disposal throughout
the year.
Over 15,000 analyses were completed for process control and NPDES permit
compliance. The Treatment Plant effluent met all (100 percent) of the NPDES permit
requirements throughout the year, which makes this the seventeenth consecutive year
of full compliance.
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POSITION PAPER
Board Meeting Date: February 5, 2015
subject. 2014 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 2014.
• 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.
The NPDES permit requires the annual report be submitted to the RWQCB by
February 1, 2015.
COMMITTEE RECOMMENDATION: This report is not reviewed by a Board
Committee.
RECOMMENDED BOARD ACTION: Receive the 2014 NPDES Annual Report.
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