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- <br /> CAMB A <br /> Table 2. Groundwater Extraction System-Mass Removal Calculations - Shell-branded Service Station - Incident#98995874, 341 East Main Street, <br /> Ripon, California <br /> TPPH Benzene MTBE <br /> TPHg Benzene MTBE <br /> Meter TPHg TPHg Removed Benzene Benzene Removed MTBE MTBE Removed <br /> Date Well Reading Conc. Removed To Date Conc. Removed To Date Conc. Removed To Date <br /> Purged ID (gallons) (u ) (pounds) (pounds) (u ) (pounds) (pounds) (ppb) (pounds) (pounds) <br /> 12/08/00 EIV-1 1,057,400 <50 <0.02710 <2.95694 <2.50 <0.00135 <0.03836 119 0.06444 14.62912 <br /> 12/13/00 EIV-1 1,103,700 <50 <0.01933 <2.97628 <2.50 <0.00097 <0.03932 118 0.04559 14.67471 <br /> 12/20/00 EIV-1 1,168,900 <50 <0.02722 <3.00350 <2.50 <0.00136 <0.04068 113 0.06148 14.73619 <br /> 12/28/00 EIV-1 1,240,300 53 <0.03160 <3.03510 <1 <0.00060 <0.04128 110 0.06554 14.80172 <br /> 01103/01 EIV-1 1,297,320 <50 <0.02381 <3.05891 <0.500 <0.00024 <0.04152 95 0.04520 14.84693 <br /> 01/11/01 EIV-1 1,372,200 <50 <0.03127 <3.09017 <0.500 <&00031 <0.04183 718 0.04611 14.89304 <br /> 01/17/01 EIV-1 1,426,100 <50 <0.02251 <3.11268 <0.500 <0.00022 <0.04205 79.8 0.03589 14.92893 <br /> 01/26/01 EIV-1 1,508,700 <50 <0.03449 <3.14717 <0.500 <0.00034 <0.04240 72.8 0.05018 14.97911 <br /> 02/02/01 EIV-1 1,571,100 <50 <0.02605 <3.17322 <0.500 <0.00026 <0.04266 81.6 0.04249 15.02159 <br /> 02109/01 EIV-1 1,632,200 <50 <0.02551 <3.19873 <0.500 <0.00025 <0.04291 43.7 0.02228 15.04387 <br /> 03/12/01 EIV-1 1,893,900 <50 <0.10927 <3.30800 <0.500 <0.00109 <0.04401 39 0.08517 15.12904 <br /> 03/27/01 EIV-1 1,977,700 <50 <0.03499 <3.34299 <0.500 <0.00035 <0.04436 22.6 0.01580 I5.14484 <br /> Total Gallons Extracted: Total Pounds Removed: 0.03510 <0.04128 14.80172 <br /> Total Gallons Removed: <0.49756 <0.00565 2.38737 <br /> Abbreviations&Not.s: <br /> TPHg=Total petroleum hydrocarbons,calculated as gasoline <br /> MTBE=Methyl tert-1;utyl ether <br /> µg/L=Micrograms per liter <br /> L=Liter <br /> gat=Gallon <br /> g=Gram <br /> Mass removed based c the formula:volume extracted(gal)x Concentration(pg/L)x(g/l0fiµg)x(pound/453.6g)x(3.785 Ugal) <br /> Volume removal dataeased on the formula:density(in gms/cc)x 9.339(ccxlbs/gmsxgals) <br /> TPHg,benzene analyzed by EPA Method 8015/8020 <br /> MTBE analyzed by EPA Method 8260 <br /> g:lripon341 ma1nlgml13WE Mass Rem TbUls Page 2 of 2 <br />