Loading...
HomeMy WebLinkAbout97.PPP 091014 Cessation of disinfection of OCSD's ocean discharge �o�NS•{ S A N f Tq T�o2 � � o Q � O - h We' re here for you. Administration Committee Meeting 9/10/2014 1 ■ Orange County Sanitation District We're here for you. TIMELINE • August 2002 : Began effluent disinfection w/bleach r _ • July 2005 : Initial decline in benthic community near the outfall • July 2008: GWRS targets 70 MGD reclaimed effluent • January 2009: GWRS increased to 90 MGD, acceleration in benthos population decline • March 2011: Full secondary treatment achieved, effluent chlorination use decreased by 90% • January2012 : Initial recovery seen in benthic community Disinfection and Beach Water Quality Studies conducted from 1999-2003 and recent special OCSD studies/projects indicate: • Discharge from OCSD outfall does not impact beach water quality • Local and natural source(s) are causing infrequent high levels of enterococci bacteria at Huntington Beach, CA • Results from J-112 Enhanced Disinfection Project • Dry weather urban runoff diversions have reduced beach bacteria levels • Effluent disinfection has no benefit on beach water quality • No overall change in beach water quality between pre-disinfection and disinfection periods • . • - County Sanitation —Total Effluent Heavy Metals — — Influent Flow 2500 500 2000 400 I b 1500 300 S _ M d .40 ` _ D a 1000200 Y 500 100 0 0 77 80 83 86 89 92 95 98 01 04 07 10 13 X 3.50 2 50 3.00 2.50 200 2.00 150 1.50 100 1.00 50 030 Outfall Flow (MGD) —TSS (1000 Ibs/day) —OC Population (Millions; right axis) 0 0.00 °���°°�'AA A$�°°y�P�°Rti�'00ti�°91 �°Cbl)�°0��A���00�°° ,c�No,o °°(),�,�O$ °°���°��°°° °°ti�°°ti�����a�°°��°°°����°°��°°°�°ti°�°titi�°titi�°tip Independent Advisory Panel Meeting Jeff Mosher, Exe.Director National Water Research Institute „ A6 o, 0 Creating New Sources of Water... I www.nwri-usa.org/ Environmental Health � . HEALTH �t George Tchobanoglous, panel chair v CALIFORNIA ENVIRONMENTAL PROTECTION AGENCY SANTA ANA REGIONAL WATER QUALITY CONTROL BOARD Jack and Nancy Skinner Coastal/Bay City Counsel Meeting • wp0�l, Water • O� O� Quality Citizens Advisory • ' c+ Committee 4tl>r04 Meeting Orange County Coastal Coalition www.newportbeachca.gov/ www.huntingtonbeach ca.goy/ http://0cgov.com/ Summary 1. Disinfection is environmentally harmful esp. on the benthic community around the outfall 2. No health benefit on local beach water quality 3. Unnecessary cost to ratepayers 4. NWRI panel recommended ceasing disinfection 5. Stakeholder feedback has endorsed ceasing disinfection The Next Steps 1. OCSD will continue Public Outreach and Stakeholder Input 2. Requested regulators to re-open ocean discharge permit to eliminate disinfection requirement 1!� PIT, I I I I , I II I,�f III I I � j I 1'i'I I f''� { {`' ) +1 �I�I I I�I■■` fJ l � ' I'f'' + I I I I f I II I f 11, �'��' +,'� 11� ��,� �� ,►� , ,� ,1► I I � I 1 4 • I� 1 `p11 I illy 1 , IN I t - _• fl I'I '� ,I�I I �` I � f f,l if � 1 I "yrp ! I � I 1 1 I f 111 ,•�[/ I4 1 �l.Y�..�►Z. I II 1 ,� '.�' 1 1�11 �I� r � A / 1 �'il, .�� l '\ � �I � �� OCSD"s Beach Monitoring OCSD begins diverting and OCSD begins disinfection on Special demonstration study: Enhanced disinfection treating runoff August 2002 from July 31—Sept. 10, 2012 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 AB411 Standards USGSStudy: OCSD outfall Changes in aquatic life observed in FOMachieves full secondary plume does not impact beach 2005,correlation with chlorine treatment contamination Orange County Sanitation1 for you. Impact of Runoff on Huntington Beach 3S _ SWE 3N - s - Past: 4 million gallons per day y� Current: 10 million gallons per day "M OF- Orange County Sanitation Huntington Beach : Potential Sources nt�ngt°� Beach Hu TalberfStorrn=K-� Drain Cha Nomai- 4007 Talbert Marsh = r - - Santa Ana River Orange County Sanitation District We're here for you.