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CRA <br /> Table 1. Groundwater Extraction-Mass Removal Data-Former Shell Service Station, 1313 East Charter Way,Stockton,California <br /> Date Cumulative 1,2 DCA 1,2 DCA <br /> Baker Purged Volume Estimated Sample 1,2 DCA Period Mass Cumulative Mass <br /> Tank Volume Pumped Flow Rate Date Concentration Removed Removed <br /> Purged (gallons) (gallons) m (pounds) (pounds) <br /> 12/22/08 2,828 69,615 0.33 12/3/2008 12 0.0003 0.0118 <br /> 12/29/08 2986 72,601 0.30 12/3/2008 12 0.0003 0.0121 <br /> 12/31/08 1,346 73,947 0.47 12/3/2008 12 0.0001 0.0122 <br /> 01/02/09 1,410 75,357 0.49 12/3/2008 12 0.0001 0.0124 <br /> 01/06/09 1,456 76,813 0.25 1/12/2009 17 0.0002 0.0126 <br /> 01/09/09 1,452 78,265 0.34 1/12/2009 17 0.0002 0.0128 <br /> 01/13/09 3,077 81,342 0.53 1/12/2009 17 0.0004 0.0132 <br /> Total Gallons Extracted: 428,535 Total Pounds Removed: 0.0802 <br /> Total Gallons Removed: 0.0077 <br /> Abbreviations&Notes: <br /> pg/L=Micrograms per liter <br /> NA=Not Analyzed or not applicable <br /> gpm=Gallons per minute <br /> Extracted groundwater transported to Martinez Refinery Corporation for disposal. <br /> 1,2-DCA is analyzed by EFA Method 8260B. <br /> When constituents arc not detected,the concentration is assumed to be equal to half the detection limit in subsequent calculations. <br /> Mass removed(pounds)based on the formula:volume(gal)x concentration(pg/L)x(gramsllejag)x(pound/453.6gram)x(3.785 Litersrgal) <br /> Volume removed(gallons)based on the formula: [mass(pounds)x 453.6(gramsfpound)x(gallons/3.785Liter)x(Liter/1000 centimeter)]/density(gramslcentimeter5) <br /> Density inputs: 1,2 Dichlomethane(1,2 DCA)=1.25 grams/cendmetersr <br /> Pur ed volume for individual wells estimated using total volume from BOLs,stroke counter readings,and totalizer readings ' <br /> I LSootma.SLtlt.Gchusl2415—WI511-Slxk1ou 1518E Chula Way\241511-REMEUTAr[OW41511-Tablt2 MMR-1 ARCHIV.ds 5of5 <br />