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i • � <br /> CAMBRIA <br /> Table 1 Mass Removal Data,Shell branded Service Station,3725 Tracy Boulevard Tracy California <br /> 23 May 01 BY 1 2,180 38,705 01/23/01 <20,000 <04 <6 390 0007 <0 10 110,000 2 30 <br /> 08-Jun 01 Bt 1 2,400 41,105 06/05/01 <13,000 <03 <6 <50 <0001 <010 33,000 1 31 <br /> 22-Jun 01 BY 1 3,700 44,805 06/05/01 <13,000 <0 4 <6 <50 <0 002 <0 10 33,000 1 32 <br /> 05 Jul 01 BY 1 2 500 47,305 06/05/01 <13,000 <0 3 <6 <50 <0 001 <0 10 33,000 1 33 <br /> Total Gallons Extracted 76,108 Total Pounds Removed <7 <01 39 <br /> Total Gallons Removed <t <0 01 6 <br /> Abbreviation%&Notes <br /> TPHg-Total purgedble hydrocarbons as gasolme <br /> MTBE=Methyl ternary butyl ether <br /> ppb=P irts per billion equivalent to pg/L <br /> pg=Micrograms <br /> L=Liter <br /> gal=Gallon <br /> b=Gram <br /> Groundwater extr[cted by vacuum trucks provided by ACTS Water disposed of at a Marltnez Teti fiery <br /> TPHg ind benzene analyzed by EPA Method SO 15/8020 <br /> MTBE analyzed by EPA Method 8260 results by EPA Method 8020 shown in italics <br /> When constituents are not detected the concentration is assumed to be equal to the detection limit in subsequent calculations <br /> Mass removed(pounds)based on the formula volume(gal)x concentranon(}tg/L)x(g1106Ng)x(pound/453 6g)x(3 785 L1gal) <br /> Volume removed(gallons)based on the formula [mass(p(iunds)x 45'1 6(g/pound)x(gal/3 785L)x(111000cm;)]/denstty(g/cm') <br /> Density inputs TPHg=0 73 g/cm` benzene=0 88 glom; MTBE=0 74 g/cm; <br /> I Concentrations based on most recent groundwater monttormg results for each h}drocarbon constituent <br /> 2 Began performing vacuum purging with a double diaphragm pump since there was carbon filter breakthrough during the I I/t/01 event <br /> G MW IA did not produce much water on May 6 2001(may have been vapor locked) so the total amount was t iken trom BF-I <br /> i <br /> 0813 Page 2 of 2 <br />