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CAMBRIA <br /> Table 2 Mass Removal Data- Shell-branded Service Station, Incident#98996184,2575 Country Club Boulevard, Stockton,California <br /> Cumulative TPPH Benzene MTBE <br /> Volume Volume TPPH* TPPH Removed Benzene* Benzene Removed MTBE* MTBE Removed <br /> Date Well Pumped Pumped Sample Concentration Removed To Date Concentration Removed To Date Concentration Removed To Date <br /> Purged ID (gal) (gal) Date (ppb) (pounds) (pounds) (ppb) (pounds).,_ ._, ) (Pounds) (ppb) (pounds) (pounds) <br /> 05/08/00 RWAA 5,000 163 255 04/18/00 64 400 268688 220 55132 14 400 060079 1394807 139,000 579933 241 63456 <br /> 05/22/00 RWAA 5 000 168,255 04/18/00 64 400 268688 223 23821 14 400 060079 1454886 139,000 5 79933 247 43389 <br /> 06/08/00 RW-lA 5 000 173,255 04/18/00 64 400 268688 225 92509 14 400 060079 15 14966 139,000 5 79933 253 23321 <br /> 06/19/00 RW-IA 5 000 178 255 04/18/00 64 400 268688 228 61197 14400 060079 15 75045 139,000 5 79933 259 03254 <br /> 07/03/00 RWAA 5 000 183,255 04/18/00 64,400 268688 231 29885 14 400 060079 1635125 139,000 5 79933 264 83187 <br /> 07/31/00 RWAA 5 000 188 255 07/28/00 45 000 1 87748 233 17633 13 500 056324 1691449 152,000 634171 271 17358 <br /> 08/14/00 RWAA 200 188 455 07/28/00 45 000 007510 233 25143 13 500 002253 1693702 152,000 025367 271 42725 <br /> 08/22/00 RW-lA 5 000 193 455 07/28/00 45 000 187748 235 12891 13 500 056324 1750026 152,000 634171 277 76896 <br /> "Total Gallons Extracted 193,455 Total Pounds Removed. 235.12891 170025 277476896 <br /> Total Gallons Removed 3854572 2.39130 44 80444 <br /> Abbreviations&Notes, <br /> TPPH=Total purgeable hydrocarbons as gasoline <br /> MTBE=Methyl tert butyl ether <br /> µg/L=Micrograms per liter <br /> ppb—Parts per billion,equivalent to pg/L <br /> L=Liter <br /> gal=Gallon <br /> g=Gram <br /> *=Concentration based on most recent groundwater monitoring results <br /> Mass removed based on the formula volume extracted(gal)x Concentration(pg/L)x(g110`µg)x(pound/453 6g)x(3 785 L/gal) <br /> Volume removal data based on the formula density(in gmslcc)x 9 339(ccxlbs/gmsxgals) <br /> TPPH benzene analyzed by EPA Method 8015/8020 <br /> MTBE analyzed by EPA Method 8260 in bold font all other MTBE analyzed by EPA Method 8020 <br /> Groundwater extracted by vacuum trucks provided by ECI Water disposed of at a Martinez refinery <br /> 7114/00 No vacuum truck operation for this day <br /> I <br /> 0783 2 of 2 <br />