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HomeMy WebLinkAbout09.a. (Handout)q 0 a. (Nanda�.i-� 2011 Annual NPDES Report Board Meeting January 26, 2012 Margaret P. Orr, RE Central Contra Costa Sanitary District 2011 NPDES Annual Report ➢ Total flow treated volume as ➢ Average daily flow gallons ➢ Average dry weather flow ➢ Peak hourly flow ➢ Ash disposal 14.8 billion gallons (the same in 2010) = 39.5 million gallons (40.6 million in 2010) = 34.6 million gallons (33.5 million gallons in 2010) = 111 million gallons per day = 3,900 tons (wet weight for soil amendment which is the same weight as in 2010) Treatment Plant ➢ Completed over 15,000 analytical tests ➢ Approximately 11,000 hours of laboratory work ➢100 percent compliance with NPDES Permit requirements ➢ NACWA Platinum Award -14th Year! Permit reporting TABLE 1. ANALYTES DETECTED WITHIN ONE ORDER OF MAGNITUDE OF THE WATER QUALITY OBJECTIVE (WQO) Analyte W00 Aug -11 Sep -11 Oct -11 Nov -11 Dec -11 Copper (mi) 7 2 5 38 4 32 619 7 49 711 Lead (ug/L) 1 8 027 020 031 031 038 Merary (ug/L) 0 025 0 0087 00044 0 00835 0 00987 000681 Zinc (ug/L) 81 24 1 33 308 307 326 Cyanide (ug/L) 1 282 255 3 22 4 33 29 Acrylanildle (ug/L) 080 08 Td Who -dn (ug[L) 001 0 .0019 00018 00032 0.0022 00020 Total PAH'S (ug/L) 15 2 28 2 Effluent BOD Concentration (mg/L) Annual Average 30 25 20 J a 15 E 10 5 0 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 Year — Effluent TSS Concentration (mg/L) Annual Average I 35 r - *lftAVImp LW — -- — — 30 25 1 J 20 a E 15 10 5 0 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 Year 3 Effluent Mercury Concentration (ug[L) Annual Averages Hg (ug /L) Aterage (ND =MDL) 0.500 Hg (ug /L) Aterage (ND =O) 0.450 -.- Hg (ug/L) Daily Maximum 0 400 0.350 0.300 0.250 0.200 0.150 0.100 0.050 0.000 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 201 Year 4 Influent Mercury Concentration (ug/L) Annual Averages Hg (ug/L) Aterage (ND =MDL) n Hg (ug/L) Aterage (ND=O) o - Hg (ug/L) Daily Maximum a e e s u 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 201 Year Effluent Mercury Concentration (ug[L) Annual Averages Hg (ug /L) Aterage (ND =MDL) 0.500 Hg (ug /L) Aterage (ND =O) 0.450 -.- Hg (ug/L) Daily Maximum 0 400 0.350 0.300 0.250 0.200 0.150 0.100 0.050 0.000 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 201 Year 4 Permit Renewal • Permit expires March 31, 2012 • New Permit Hearing February 8, 2012 • Continued Nutrient Study participation • Suisun Bay Study • NNE Process • BACWA Conceptual Model • Continued Surface Water Ambient Monitoring 5