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Z. 1 • i <br /> Table 1 Water Level Data and Ground Water Analytic Results - Chevron Service Station X19-6171, 6633 Pacific Avenue, Stockton, California <br /> (continued) <br /> j EXPLANATION NOTES (continued) <br /> DTW= Depth to water ` Monitoring well abandoned on July 31, 1992 <br /> TOC = Top of casing elevation r EDB was also analyzed and not detected at detection hunts of 0 2 ppb <br /> GWE= Ground water elevation ° TOG was also analyzed and not detected at detection limits of 5,000 ppb <br /> mal = Measurements referenced relative to mean sea level I Gasoline range concentration reported Peaks not associated with gasoline art <br /> TPPH(G) = Total Purgeable Petroleum Hydrocarbons as Gasoline observed early in the chromatogram <br /> B = Benzene I Both gasoline and multiple solvent peaks were observed in the chromatogram <br /> T - Toluene 6 Uncategonzed compound is not included in the gasoline hydrocarbon <br /> E = Ethylbenzene concentration <br /> X = Xylenes r Detection limit raised due to surf ketems <br /> EDB = Ethylene dibromide 6 Typical gasoline pattern not present Peak at 7 2 minutes subtracted from <br /> TOG =Total Oil and Grease gasoline range before calculating gasoline concentration <br /> VOC = Volatile Organic Compound ' Non-gaaolme components which were not identified by the laboratory present in <br /> — = Not analyzedlnot applicable sample at 150 ppb, 11/29/90 Non-gasolme components which were not <br /> ppb = Parts per billion identified by the laboratory present in sample at 300 ppb,3114191 <br /> 10 Gasoline range concentration reported, peaks are representative of <br /> ANALYTIC METHODS tetrachloroethane and trace amount of gasoline <br /> i` Gasoline range concentration reported The chrornatogram shows only a single <br /> 8015 = EPA Method 5030/8015 for TPPH(G) peak <br /> 602 = EPA Method 602 for BTEX u Both gasoline and a single solvent peak(chlorinated) were observed in the <br /> 8020 = EPA Method 8020 for BTEX chromatogram <br /> 504 - EPA Method 504 for EDB i' Both gasoline and a single solvent peak are observed in the chromatogram <br /> 503E= Standard Methods Method 503E for TOG " Detection hunt raised due to foaming sample matnx <br /> 8240 — EPA Method 8240 for VOC's i' TOC elevation for well MW-7 was surveyed by Ron Miller,Licensed Land <br /> Surveyor,PE 915816 on September 13, 1993 <br /> NOTES 16 Carryover from previous sample in nut sequence made it necessary to analyze <br /> backup sample Backup sample foamed,therefore,no data is available <br /> TOC elevations were surveyed by Ron Miller,Licensed Land Surveyor,CE 115816 `r The sample was diluted due to high concentration of non-target compounds <br /> on September 5, 1990 Hydrocarbons in the gasoline sample do not match the gasoline standard pattern <br /> 16 The sample was diluted due to high concentrations of non-target compounds <br /> • Product thickness was measured with an MMC flea-lip interface probe <br /> 5121 TQM <br />