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VAPOR EXTRACTION SYSTEM PERFORMANCE DATA <br /> Exxon Service Station No 7-0137 <br /> 1605 S El Dorado Street <br /> Stockton,California <br /> TPH as gasoline Benzene Estimated Pounds TPH <br /> Percent Influent Flowrate Influent TPH as gasoline Effluent as gasoline Removed in <br /> Date Days Operational Operational (CFM) (pg/L) Effluent (µg/L) (gg/L) Period <br /> 11/13/95 NA NA 38 20,055 218 2 - <br /> 1 l/13/95 NA NA 38 21,110 289 3 0 <br /> 11/20/95 NA NA 38 5,278 95 1 31559 <br /> 12/Q4/95 NA NA 38 3,518 60 0 21039 <br /> 01/03/96 NA NA 38 2,392 42 0 30296 <br /> 02/05/96 NA NA 38 1,500 13 ND 21946 <br /> 03/04/96 NA NA 38 900 10 ND 11481 <br /> 02/21/97 0 - NM 380 <5 <0 05 000 <br /> 02/27/97 6 100% 7 52 <5 <0 05 0 82 <br /> 04/04/97 35 97% 53 1,200 24 0 5911 <br /> 05/06/97 17 53% 85 130 <10 <0 1 7014 <br /> 06/04/97 29 100% 83 210 <10 <0 1 37 24 <br /> 07/02/97 28 100% 80 440 <10 <0 1 6681 <br /> 08/11/97 40 100% 83 69 <10 <0 1 7474 <br /> 09/11/97 31 100% 83 200 10 <0 1 31 12 <br /> 10/17/97 15 42% 97 51 <5 <0 05 1523 <br /> 12/04/97 31 65% 79 DS <10 <0 1 1251 <br /> 01/29/98 14 25% 83 280 <10 <0 1 1688 <br /> 03/30/98 3 5% 83 <10 <10 <0 1 3 13 <br /> Total or Average 249 61% <br /> 1,551 <br /> TPPH =Total purgeable petroleum hydrocarbons <br /> CFM=Cubic feet per minute <br /> µg/L=Micrograms per liter <br /> NA=Not available rtrfomrauon <br /> NM=Not measured <br /> ND=Non detect <br /> DS=Tedlar bag was received deflated by laboratory,concentration assumed equal to 10/17/97 result for calculahon <br /> Note Estimated pounds total petroleum hydrocarbons as gasoline removed to period_Average Influent cone µg/1.)"average flowrate(CFM) 1,440 min/day•1 g/1,000 000 mg'0 002205 ibslg`28 32 1j <br /> SVE system operated by Fugro from November 13 1995 to Manch 4 1996 <br /> SVE system operated by EA from March 4 1996 to March 30 1998 <br /> (Page I of 1)99-865 xis <br />