Laserfiche WebLink
SIERRA <br /> Table 1 Water Level Data and Ground Water Analytic Results - Chevron Service Station #9-6171, 6633 Pacific Avenue, <br /> Stockton, California (continued) <br /> EXPLANATION NOTES <br /> DTW=Depth to water TOC elevations were surveyed by Ron Miller, Licensed Land Surveyor, <br /> TOC=Top of casing elevation CE#15816 on September 5 1990 <br /> GWE=Ground water elevation <br /> msl=Measurements referenced relative to mean sea level Product thickness was measured with an MMC[lexi-dip interface probe <br /> TPPH(G)= Total Purgeable Petroleum Hydrocarbons ' Monitoring well abandoned on July 31, 1992 <br /> as Gasoline 2 EDB was also analyzed and not detected at detection limits of 0 2 ppb <br /> TOG=Total Oil and Grease s TOG was also analyzed and not detected at detection limits of 5,000 ppb <br /> B=Benzene ' Gasoline range concentration reported Peaks not associated with gasoline <br /> T=Toluene are observed early in the chromatogram <br /> E=Ethylbenzene 5 Both gasoline and multiple solvent peaks were observed in the <br /> X=Xylenes chromatogram <br /> EDS=Ethylene dibromide 6 Uncategonzed compound is not included in the gasoline hydrocarbon <br /> VOC=Volatile Organic Compound concentration <br /> -- =Not analyzed/not applicable 7 Detection limit raised due to surfactants <br /> ppb=Parts per billion 6 Typical gasoline pattern not present Peak at 7 2 minutes subtracted from <br /> gasoline range before calculating gasoline concentration <br /> ANALYTIC METHODS ° Non-gasoline components which were not identified by the laboratory <br /> present in sample at 150 ppb 11/29/90 Non-gasoline components which <br /> 8015=EPA Method 5030/8015 for TPPH(G) were not identified by the laboratory present in sample at 300 ppb <br /> 602=EPA Method 602 for BTEX 3/14/91 <br /> 8020=EPA Method 8020 for BTEX 10 Gasoline range concentration reported peaks are representative of <br /> 504=EPA Method 504 for EDB tetrachloroethene and trace amount of gasoline <br /> 503E=Standard Methods Method 503E for TOG " Gasoline range concentration reported The chromatogram shows only a <br /> 8240=EPA Method 8240 for VOC s single peak <br /> '2 Both gasoline and a single solvent peak(chlorinated)were observed in the <br /> chromatogram <br /> " Both gasoline and a single solvent peak are observed in the chromatogram <br /> 14 Detection limit raised due to foaming sample matrix <br /> 15 TOC elevation for well MW-7 was surveyed by Ron Miller Licenced Land <br /> Surveyor PE#15816 on September 13 1993 <br /> '6 Carryover from previous sample in run sequence made it necessary to <br /> analyze backup sample Backup sample foamed therefore no data is <br /> available <br /> 14604T WLG <br />