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CAMBRIA
<br /> Table 1.Mass Removal Data,Shell-branded Service Station,3725 Tracy Boulevard,Tracy,California
<br /> Cumulative Cumulative Cumulative Cumulative
<br /> Volume Volume TPHg TPHg TPHg Benzene Benzene Benzene MTBE MTBE MTBE
<br /> Date Well Pumped Pumped Sample Concentration Removed Removed Concentration Removed Removed Concentration Removed Removed
<br /> Purged ID ( al) ( al) Date (ppb) (pounds) (pounds) (ppb) (pounds) (pounds) (ppb) (pounds) (pounds)
<br /> 23-Mar-01 BF-1 2,101 28,596 01/23/01 <20,000 0.175 2.14 390 0.007 0.052 110,000 1.928 21.0
<br /> 26-Apr-Ol BF-I 2,400 30,996 01/23/01 <20,000 0.200 2.34 390 0.008 0.060 110,000 2.203 23.2
<br /> 06-May-01 3 BF-1 5,529 36,525 01/23/01 <20,000 0.461 2.80 390 0.018 0.078 110,000 5.075 28.3
<br /> 23-May-01 BF-1 2,180 38,705 01/23/01 <20,000 0.182 2.98 390 0.007 0.085 tt0,000 2.001 30.3
<br /> 08-Jun-01 BF-1 2,400 41,105 06/05/01 <13,000 0.130 3.11 <50 0.001 0.085 33,000 0.661 30.9
<br /> 22-Jun-01 BF-1 3,700 44,805 06/05/01 <13,000 0.201 3.31 <50 0.001 0.086 33,000 1.019 31.9
<br /> 05-Jul-01 BF-I 2,500 47,305 06/05/01 <13,000 0.136 3.45 <50 0.001 0.086 33,000 0.688 32.6
<br /> 23-Jul-01 BF-1 2,200 49,505 06/05/01 <13,000 0.119 3.57 <50 0.000 0.087 33,000 0.606 33.2
<br /> 09-Aug-01 BF-1 1,500 51,005 07/27/01 <20,000 0.125 3.69 <200 0.001 0.088 75,000 0.939 34.2
<br /> 25-Aug-01 BF-1 2,100 53,105 07/27/01 <20,000 0.175 3.87 <200 0.002 0.090 75,000 1.314 35.5
<br /> 08-Sep-01 BF-1 1,400 54,505 07/27/01 <20,000 0.117 3.99 <200 0.001 0.091 75,000 0.876 36.4
<br /> 28-Sep-01 BF-1 1,000 55,505 07/27/01 <20,000 0.083 4.07 <200 0.001 0.092 75,000 0.626 37.0
<br /> 17-Oct-01 BF-1 2,400 57,905 07/27/01 <20,000 0.200 4.27 <200 0.002 0.094 75,000 1.502 38.5
<br /> 29-Oct-Ot BF-I 2,400 60,305 10/24/01 <200 0.002 4.27 <2.0 0.000 0.094 690 0.014 38.5
<br /> 14-Nov-01 BF-I 2,400 62,705 10/24/01 <200 0.002 4.27 <2.0 0.000 0.094 690 0.014 38.5
<br /> 28-Nov-01 BF-1 2,400 65,105 10/24/01 <200 0.002 4.28 <2.0 0.000 0.094 690 O.Ot4 38.5
<br /> 12-Dec-01 BF-1 1,000 66,105 10/24/01 <200 0.001 4.28 <2.0 0.000 0.094 690 0.006 38.5
<br /> 26-Dec-01 BF-1 2,500 68,605 10/24/01 <200 0.002 4.28 <2.0 0.000 0.094 690 0.014 38.6
<br /> 09-Jan-02 BF-1 2,550 71,155 10/24/01 <200 0.002 4.28 <2.0 0.000 0.094 690 0.015 38.6
<br /> 23-Jan-02 BF-I 1,800 72,955 01/23/02 <50 0.000 4.28 <0.50 0.000 0.094 130 0.002 38.6
<br /> 06-Feb-02 BF-1 1,700 74,655 01/23/02 <50 0.000 4.28 <0.50 0.000 0.094 130 0.002 38.6
<br /> 20-Feb-02 BF-1 1,000 75,655 01/23/02 <50 0.000 4.28 <0.50 0.000 0.094 130 0.001 38.6
<br /> otal Galloins U" S�, b F To al.'o tds Removed: S q4 f: 0.102
<br /> _! ota1 Gallons R'einovetl- �� . .0.8938.. ....
<br /> Abbreviations&Notes:
<br /> TPHg=Total purgeable hydrocarbons as gasoline
<br /> MTBE=Methyl tertiary butyl ether
<br /> ppb=Parts per billion,equivalent to Jeg/L
<br /> jig=Micrograms
<br /> L=Liter
<br /> gal=Gallon
<br /> 0813 Page 3 of 4
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