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_ o <br /> m <br /> r, <br /> m <br /> en <br /> Table 1 Water Level Data and Groundwater Analytic Results - Chevron Service Station #9-6171, 6633 Pacific Avenue, Stockton, Califoma <br /> (continued) ra <br /> EXPLANATION _s <br /> l,'OTC3 (continued) <br /> DTtV = Depth to water en <br /> TOC=Top of easing elevation ' Monitoring well abandoned an July 31, 1992 <br /> n <br /> OWE A Groundwater elevation ' EDB was also anityzed and not detected at detcebon brain of 0 2 ppb <br /> 00 <br /> msl =Measurements referenced relative to mean sea level ' TOO was also analyzed and not detected at deteeboa limits of 5,000 ppb <br /> TPPH(G) s'total Purgeablo Petroleum H)drocarbons as Gasoline ` Gasoline range coneentrationreponed Peals not auoclated with gasoline are <br /> B =Benzene observed catty in the chromatogram co <br /> T =Tolue no r Both gasoline and mu Itiple solvent peals wero observed In the chromatogram � <br /> E =Ethylbetvene a Uncaue oozed compound is not Included in the <br /> g p gasoline hydrocarbon <br /> X —x)lcnea sorrcentratton. <br /> EDB a Eth)lone dNromrda ' Delectson limit raised duo to surfaetsnts <br /> TOG A Total Oil and Grease ' Typical gasoline partcm not present Peal, it 7 2 minutes subtracted from <br /> VOC a Volatile Orgnnte Compound gasoline range before calculating gasoline concenlnuon <br /> Not analyzedlnol applicable ' Non-gssoltne components which were not idtahtcd by the fib oratory present <br /> ppb=Pans per billion in sample at 150 ppb, 11/29190 Nan-gasoline components which were not n <br /> tderili Eked by the liborsitory preseat in sample at 300 ppb,3114191 <br /> t�NALYTfC METHODS Gasoline range concentration reported, peaks wog representative of <br /> letraehloroahane And Iraca amount ofgaaoline p <br /> 8015-EPA Method 50301$015 for TPPH(G) i' Gasoline range concentration reparted The thromailogum thaws only a single Z <br /> 602 a EPA Method 602 for BTEX peak 110 <br /> 8020 b EPA Method 8020 rot{ITEX n Both 9130110S and 19 stnglo solvent peak(ehlonnited) were observed in the C <br /> n <br /> 504 -EPA Method 504 for EDB chroutogram C <br /> 503E 4 Standard h{ed ods Method 503E Fur TOG is Bath gasoline and a single solvent peak are observed in the:chromatogram ,n <br /> 8240=EPA Method 8240 for VOC's 1e Detection limit raised dug to foaming sample matrix N <br /> 's TOC elevation for well Mw 7 was surveyed by Ron Miller, Licensed band 4 <br /> NOTES, Surveyor,PE 1158I6 on September 13, 1993, y <br /> Csrryovcr(coin previous sample in run sequence made it Decesury to analyze ,b <br /> TOC elevations ware surve)ed by Ron Miller,Licensed Iand Surveyor,CE 115816 backup sample Back-up sample foamed,thcrefom,no data is available <br /> on September 5, 1990 " The sample was diluted due to high eoncenlmdoa of rion-target compounds <br /> Hydrocarbons in the gasoline ssmpl4 do not match the gasoline standard pattern. <br /> Water level elevation data And laboratory Analylie results pnor to May30,1995 were " '{he sample we s diluted due to high eoncentrauons of non target compounds U, <br /> compiled from Quarterly Monitoring Reports prepared for Chevmn by Sierra <br /> Environmental Services n <br /> • Product IfiKkneu w2s rnessumd with sa MMC Elexr-dip inlerfac4 probe <br /> 5121 TQM <br /> 1� <br /> 0 <br /> —s <br /> a <br /> 0 <br />