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<br /> CAMB RIA
<br /> Table 2 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 _ (gal) (gal) Date (ppb) (pounds) (pounds) (ppb) (pounds) (pounds) (ppb) (pounds) (pounds)
<br /> 15-Feb-01 BF-1 2,422 26,495 01/23/01 <20,000 0202 196 390 0 008 0 045 110,000 2 223 191
<br /> 23-Mar-01 BF-1 2,101 28,596 01/23/01 <20,000 0175 214 390 0007 0052 110,000 1928 210
<br /> 26-Apr-01 BF-1 2,400 30,996 01/23/01 <20,000 0200 234 390 0 008 0 060 110,000 2203 232
<br /> 06-May-01 3 BF-I 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 0 182 298 390 0 007 0 085 110,000 2001 303
<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 0 661 309
<br /> 22-Jan-01 BF-1 3,700 44,805 06/05/01 <13,000 0201 3 31 <50 0 001 0 086 33,000 1019 319
<br /> 05-Jul-01 BF-1 2,500 47,305 06/05/01 <13,000 0 136 3 45 <50 0 001 0 086 33,000 0 688 326
<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 0 606 332
<br /> 09-Aug-01 BF-1 1,500 51,005 07/27/01 <20,000 0 125 369 <200 0 001 0 088 75,000 0 939 342
<br /> 25-Aug-01 BF-1 2,100 53,105 07/27/01 <20,000 0175 387 <200 0002 0090 75,000 1314 355
<br /> 08-Sep-01 BF-1 1,400 54,505 07/27/01 <20,000 O H7 399 <200 0 001 0 091 75,000 0 876 364
<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 0 626 370
<br /> 17-Oct-01 BF-1 2,400 57,905 07/27/01 <20,000 0200 4 27 <200 0 002 0 094 75,000 1 502 385
<br /> 29-Oct-01 BF-1 2,400 60,305 10/24/01 <200 0 002 4 27 <2 0 0 000 0 094 690 0 014 385
<br /> 14-Nov-01 BF-1 2,400 62,705 10/24/01 <200 0 002 4 27 <2 0 0 000 0 094 690 0 014 385
<br /> 28-Nov-01 BF-1 2,400 65,105 10/24/01 <200 0 002 428 <2 0 0 000 0 094 690 0 014 385
<br /> 12-Dec-01 BF-1 1,000 66,105 10/24/01 <200 0 001 428 <2 0 0 000 0 094 690 0 006 385
<br /> 26-Dec-01 BF-1 2,500 68,605 10/24/01 <200 0 002 428 <2 0 0 000 0 094 690 0 014 386
<br /> 09-Jan-02 BF-1 2,550 71,155 10/24/01 <200 0 002 428 <2 0 0 000 0 094 690 0 015 386
<br /> 23-Jan-02 BF-1 1,800 72,955 01/23/02 <50 0 000 428 <0 50 0 000 0 094 130 0 002 386
<br /> 06-Feb-02 BF-1 1,700 74,655 01/23/02 <50 0 000 428 <0 50 0 000 0 094 130 0 002 386
<br /> 20-Feb-02 BF-1 1,000 75,655 O1/23/02 <50 0 000 428 <0 50 0 000 0 094 130 0 001 38 6
<br /> ,Total Gallons Extracted- 182,784 Total Pounds Removed 5.45 0.102 51A
<br /> Total Gallons Removed 0.894 0 014 8.32
<br /> Abbreviations&Notes
<br /> TPHg=Total purgeable hydrocarbons as gasoline
<br /> MTBE=Methyl tertiary butyl ether
<br /> ppb=Parts per billion,equivalent to ug/L
<br /> gg=Micrograms
<br /> L=Liter
<br /> 0813 Page 3 of 4
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