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I SVE System Installation and Efficiene} Report Canepa s Car Wash(Pacific Avenue) June 25 1999 Page -4 Ichain-of-custody procedures, to GeoAnalytical Laboratories, Inc, in Modesto, California, on the day of Collection I6 1 1 Laboratory Analyses The laboratory samples were analyzed by GeoAnalyttcal Laboratories, Inc for total petroleum I hydrocarbons - quantified as gasoline (TPH-G) by Method 5030/LUFT, and for benzene, toluene, ethyl benzene, and total xylenes (BTEX) and for methy I tertiary-butyl ether(MTBE) by EPA Method 8020 I PID nneasurements of tine SVE system influent and effluent detected VOC concentrations of 281 and 1 9 parts per million (ppin), respectively Laboratory analysis of the influent sample Indicated that BTEX constituents were detected at concentrations ranging from 8 4 to 630 micrograms per liter(µg/I) MTBE was detected at a concentration of 190 pg/l and TPH-G was detected at a concentration of 2 1 milligrams per liter (mg/1) Laboratory analysis of t11e effluent sample indicated that benzene and toluene were detected at concentrations of 2 2 µg/I and 1 3 µg/1, respectively Ethyl benzene, total xylenes, TPH-G, and MTBE were not detected at or above laboratory reported detection limits The March 15, 1999 influent and effluent data are shown below in Table 1 Laboratory report sheets indicating analytical methods used, detection limits, and the results of the analyses are included in Appendix C I TABLE 1 LABORATORY AND PID ANALYTICAL RESULTS(MARCH 15, 1999) B T E A TPH-G MTBE PID MEASUREMENT Detection 03 03 03 06 005 1 0 1 0 ILimits—* µg/1 µl;/1 µ€,l1 µg/l mg/1 µP,/1 ppm SAMPLE I D I1701-Influent 3115/99 200 630 84 28 2 1 190 281 1701-Effluent 3/15/99 22 1 3 ND ND ND ND 19 Unit Convc r'ions An-6tic-il lig/l parts per billion(ppb) B 1,h X-benzene toluene,etli3I benzene and total xylenes mg/I pans pet mt€lion(ppm) TPH-G=total petroleum hydrocarbons quantified as gasoline MTBE=Methyl tertiary Butyl Ether PID=photoionization detector ND=not detected at or abo%a reported laboratory detection limit IUstno both the influent and effluent concentrations of benzene and toluene reported by the laboratory in the samples c011CLted on March 15, 1999, the destruction efficiency for the SVE system ranges from I98 90 to 99 79 percent 6 2 FIELD MONITORING I lie SVE system is monitored by Condor on a wcokly basis Volatile organic vapor screening is 6 performed with a PID at the system inlet and exhaust to evaluate the destruction efficiency of the thermal oxidation unit Vacuum measurements in inches of water are recorded trorn ports installed at the SVE I wells to evaluate the radius of Influence Various other system parameters are monitored to inaiulwn optimum pciforinance of the SVE system (see SVE System Log, Appendix D) Ntio� Ia« CONDOR