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Table A-4
<br /> Dual Phase Extraction System-Groundwater Treatment Effluent Data
<br /> ARCO 4932
<br />-� - 16 East Harding Way, Stockton, California
<br /> Effluent Concentrations
<br /> Average
<br /> Totalizer Volume Discharge TPH as Ethyl- Total In
<br /> Sample Date Value Discharged Rate Gasoline Benzene Toluene Benzene Xylenes MtBE Compliance
<br /> ID Sampled (gallons) (gallons) m /L L /L /L /L /L H (Yes/No-)
<br /> GW EFFL 05/14/03 a 510 0 0 <5,000 <0 50 <0 50 <0 50 <0 50 <0 50 948 Yes
<br /> 05/29/03 b 630 0 0 -- -- - -- - -- - -
<br /> GW-EFF 07/08/03 c 1,000 0 0 <50 <0 50 <0 50 <0 50 <0 50 1 1 8 49 No
<br /> EFF 08/07/03 g,h 47,800 46,800 108 <50 <0 50 <0 50 <0 50 <0 50 <0 50 8 36 Yes
<br /> - 08/14/03 1 64,200 16,400 163 -- -- - -- - -- - -
<br /> EFF 08/25/03 1 -- - -- -- <0 50 <0 50 <0 50 <0 50 <0 50 851 Yes
<br /> - 09/02/03 a -- -- -- -- -- - -- - - - -
<br /> -- 09/05/03 k -- -- -- -- -- - -- -- -- --
<br /> EFF 09/09/03 68,200 4,000 0 93 <50 <0 50 <0 50 <0 50 <0 50 <0 50 8 80 Yes
<br /> -- 10/09/03 118 600 50,400 1 17 -- __ - - __ - -
<br /> EFF 10/23/03 140,560 21,960 109 <50 <0 50 <0 50 <0 50 <0 50 <0 50 796 Yes
<br /> -- 10/29/03 141,980 1,420 016 - - - __ _ __ _ _
<br /> -- 11/05/03 146,440 4,460 044 -- - - -- - - --
<br /> GW-EFF 11/13/03 I,m 151,000 4,560 040 <50 <0 50 <0 50 <0 50 <0 50 <0 50 7 56 Yes
<br /> EFF 12/03/03 184,200 33,200 1 15 <50 <0 50 <0 50 <0 50 <0 50 <0 50 820 Yes
<br /> EFF 01/12/04 n 263,870 79 670 1 38 <50 <0 50 <0 50 <0 50 <0 50 <0 50 862 Yes
<br /> EFF 02/04/04 328,800 64,930 196 <50 <0 50 <0 50 <0 50 <0 50 <0 50 8 53 Yes
<br /> EFF 03/03/04 407,240 78,440 1 95 <50 <0 50 <0 50 <0 50 <0 50 <0 50 842 Yes
<br /> EFF 04/05/04 486,070 78,830 166 <50 <0 50 <0 50 <0 50 <0 50 <0 50 870 Yes
<br /> 04/30/04 d 529,020 42,950 119 -- - - -- - - - -
<br /> 05/25/04 d 529,020 0 000 - -- -- -- _ _ _
<br /> EFF 06/14/04 a 540,400 11,380 040 <50 <0 50 <0 50 <0 50 <0 50 <0 50 877 Yes
<br /> EFF 07/13/04 638,970 96,570 236 <50 <0 50 <0 50 <0 50 <0 50 <0 50 866 Yes
<br /> . EFF 08/01/04 o 685,450 46,480 1 70 <50 <0 50 <0 50 <0 50 <0 50 <0 50 7 84 Yes
<br /> EFF 09/09/04 744,200 58,750 1 05 <50 <0 50 <0 50 <0 50 <0 50 <0 50 827 Yes
<br /> EFF 10/04/04 788 000 43,800 1 22 - -- _ _ _ _ _ _
<br /> REPORTING PERIOD August 2004(09109104 to 10/04104)'
<br /> TOT WATER DISCHARGED(gal) 787,000
<br /> PERIOD WATER DISCHARGED(gal) ,102,550 "
<br /> PERIOD AVG DISCHARGE RATE(gpm) 122 r ,
<br /> TOTAL AVG DISCHARGE RATE m- 1 15
<br /> Definitions Wastewater Discharch Permit limitations
<br /> pg/L =Micrograms per liter Flow Rate<5 gpm
<br /> gpm =Gallons per minute TPH<100,000 pgll
<br /> TPH =Total petroleum hydrocarbons Total BTEX<4,570 pgll
<br /> MtBE =Methyl-tert-butyl ether Benzene<500 pgll
<br /> not available MtBE<0 5 pgll
<br /> 50<pH<100
<br /> Notes
<br /> a System start-up and shake-down Groundwater samples collected prior to intitial discharge Water held in knockout
<br /> b LEL monitoring device and totalizer certification conducted LEL monitoring device not waterproof,replacement ordered Water
<br /> held in knockout
<br /> c Permanent system startup
<br /> d System shut down for carbon changeout
<br /> e System restarted
<br /> f Data not available at time of reporting
<br /> g Analysis for ail analytes except TPH as gasoline and pH were run without pnor method blank Analysis run beyond the EPA
<br /> recommended holding time still reported reported the analytes as non-detect
<br /> h Sample was not received by the laboratory within the EPA recommended holding time for pH
<br /> i Groundwater extraction system was shut down to await for samples taken on 08/07/03 to confirm that effluent MtBE hit was in
<br /> fact a laboratory anamoly The 08/07/03 samples were received 08/25/03
<br /> Sample was taken to confirm 08107/03 sample analyses which were not run according to standard LPA methods
<br /> k GWE system shut down due to air stripper failure
<br /> 1 Air stripper additive installed to prevent scaling
<br /> m Autodialer installed
<br /> n Sample for pH was collected 01/21/04 because original sample was run beyond the EPA recommended holding time
<br /> o Sample for pH was collected 08/25/04 because original sample was run beyond the EPA recommended holding time
<br /> 11ARCOW93210&M1ARCO 4932 O&M Tables 3004 xis
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