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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) ( pm) (N /L) (N /L) (N 1L) (u IL) (pg/L) (dig/L) pH (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 1 849 No
<br /> EFF 08/07/03 g,h 47,800 46,800 1 08 <50 <0 50 <0 50 <0 50 <0 50 8 36 Yes
<br /> ' - 08/14/03 i 64,200 16,400 163 - -- - - - - - --
<br /> EFF 08/25/03 <0 50 <0 50 <0 50 <0 50 <0 50 8 51 Yes
<br /> - 09/02/03 a -- -- -- -_ - -- - - - -
<br /> - 09/05/03 k - -- - -- -- - -- - - - --
<br /> ' EFF 09/09/03 68,200 4,000 093 <50 <0 50 <0 50 <0 50 <0 50 <0 50 880 Yes
<br /> 10/09/03 118,600 50,400 117
<br /> EFF 10/23/03 140,560 21,960 1 09 <50 <0 50 <0 50 <0 50 <0 50 <0 50 7 96 Yes
<br /> - 10/29/03 941980 1,420 016 -- - - -- -- -- _ __
<br /> '
<br /> - 11105103 146,440 4 460 044 - - -- -- -- -- -
<br /> EFF -
<br /> GW- 11/13/03 i,m 151,000 4,560 0 40 <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 8 62 Yes
<br /> EFF 02/04/04 328,800 64,930 196 <50 <0 50 <0 50 <0 50 <0 50 <0 50 853 Yes
<br /> EFF 03/03/04 407,240 78,440 195 <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 98 570 236 <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 50 784 Yes
<br /> EFF 09/09/04 744,200 58,750 105 <50 <0 50 <0 50 <0 50 <0 50 <0 50 127 Yes
<br /> EFF 10/04/04 788,000 43,800 9 22 <50 <0 50 <0 50 <0 50 <0 50 <0 50 840 Yes
<br /> EFF 11/01/04 844,100 56,100 1 39 <50 <0 50 <0 50 <0 50 <0 50 <0 50 8 54 Yes
<br /> EFF 12/13/04 954,500 110,400 1 83 <50 <0 50 <0 50 <0 50 <0 50 <0 50 8 37 Yes
<br /> EFF 01/05/05 1,011,400 56,900 1 72 <50 <0 50 <0 50 <0 50 <0 50 <0 50 147 Yes
<br /> ' EFF 02/09/05 1,119,300 107,900 214 <50 <0 50 <0 50 <0 50 <0 50 <0 50 8 35 Yes
<br /> EFF 03/15/05 1 163,080 43,780 089 <50 <0 50 <0 50 <0 50 <0 50 <0 50 835 Yes
<br /> EFF 04/14/05 1 264 300 101,220 234 <50 <0 50 <0 50 <0 50 <0 50 <0 50 845 Yes
<br /> EFF 05/09/05 1,308,600 44,300 123 <50 <0 50 <0 50 <0 50 <0 50 <0 50 8 62 Yes
<br /> EFF 06/01/05 1,308,600 0 000 <50 <0 50 <0 50 <0 50 <0 50 <0 50 8 64 Yes
<br /> Definitions Wastewater Discharch Permit limitations
<br /> pg/L =Micrograms per liter Flow Rate<5 gpm
<br /> ' gpm =Gallons per minute TPH<100,000 ugll
<br /> TPH =Total petroleum hydrocarbons Total BTEX<4,570 pg/I
<br /> MtBE =Methyl-tert-butyl ether Benzene<500 pgli
<br /> =not available MtBE<0 5 pg/I
<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 /> t 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 all analytes except TPH as gasoline and PH were run without prior 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 08/07/03 sample analyses which were not run according to standard EPA methods
<br /> k GWE system shut down due to air stripper failure
<br /> I 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 /> I IBP ARC01493210&MIDPE O&M Tables5ARCO 4932 O&M Tables 2Q05 As
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