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0 i ' <br /> Table 3 Groundwater Analytical Results - Volatile Organic Compounds - Chevron Service Station #19-6171, 6633 Pacific Avenue, Stockton, California <br /> (continued) <br /> EXPLANATION ANALYTICAL LABORATORIES <br /> 1,2-DCA = 1,2 Dichloroethane APPL = Agriculture&Priority Poilutants Laboratories,Inc of Fresno,California <br /> 1,1 DCA = 1,1 Dichloroethane SAL = Superior Analytical Laboratory of San Francisco California <br /> TCE = Trichloraethene GTEL = Groundwater Technology Environmental Laboratories, Inc , of Concord, California <br /> PCE = Tetrachloroethene SEQ = Sequoia Analytical Laboratories of Redwood City,California <br /> B = Benzene Quanterra = Quanterra Environmental Services of West Sacramento California <br /> T= Toluene <br /> E = Ethylbenzene NOTES <br /> X = Xylenes <br /> VOCs = Volatile Organic Compounds ' Well has been dry since December 15 1989 sampling event <br /> ppb = Parts per billion 2 Chloroform detected at 1 4 ppb Other VOCs not detected at detection limits of 0 5 to 1 0 ppb <br /> ND = Not detected i Not detected at detection limits of 0 5 to 1 0 ppb <br /> ` Not detected at detection limits of 3 to 20 ppb <br /> ANALYTICAL METHODS 5 BTEX concentrations included on Table 2 Other VOC s not detected at detection limits of 5 to 50 ppb <br /> All other VOC s were non detectable with detections limits ranging from 40 to 200 ppb <br /> VOC = EPA Method 8240/EPA Method 624& ' All other VOC s were non detectable with detection limits ranging from 100 to 700 ppb <br /> EPA method 8260 s All other VOC's were non detectable with detection limits ranging from 22 to 110 ppb <br /> Volatile Tentatively Identified Compounds not present at estimated detection limits of 100 ppb Positive <br /> identification or specification between isomers cannot be made without retention time standards <br /> Q Volatile Tentatively Identified Compounds not present at estimated detection limits of 250 ppb Positive <br /> iaentificatton or specification between isomers cannot be made without retention time standards <br /> " Volatile Tentatively Identified Compounds not present at estimated detection lirruts of 56 ppb Positive <br /> identification or specification between isomers cannot be made without retention time standards <br /> " Split samples taken by Levine-Fricke-Recon,analyzed by Quanterra Environmental Services of West <br /> S tcramento Analytical results supplied by Levine-Fricke-Recon <br /> Cts-1 2-Dichloroethene was detected at 1 6 ppb All other constituents were non detectable <br /> " All other constituents were non-detectable <br /> 15 Cis-1 2-Drchloroethene was detected at 10 ppb All other constituents were non-detectable <br /> 16 Benzene and toluene were detected at 1 3 and 1 2 ppb respectively All other constituents were non- <br /> detectable <br /> 17 Toluene was detected at 2 1 ppb All other constituents were non-detectable <br /> 18 Cis-1,2 Dichloroethane was detected at 1 9 ppb Chloroform 1,1 1-Trichloroethane,benzene and toluene <br /> were detected at 1 7 7 6 1 6 and 1 1 ppb,respectively <br /> 19 Chloroform 1 1,1 trichloroethane, benzene, and toluene were detected at 3 3, 9 0, 1 3, and 1 6 ppb <br /> respectively <br /> Cts 1 2 dichloroethane and 1,1,1 2-tetrachloroethane were detected at 1 9 and 1 8 ppb respectively <br /> 5121voc TQM <br /> 2 <br />