Laserfiche WebLink
TABLE 1B <br /> ADDITIONAL CUMULATIVE GROUNDWATER MONITORING AND SAMPLING DATA <br /> Former Mobil Service Station 99CAS <br /> 75 E.Alpine Avenue <br /> Stockton,California <br /> (Page 7 of 8) <br /> Well Sampling DIPE ETBE TAME TBA 1,2-DCA EDB Ethanol Methanol <br /> ID Date (V9/L) (N9/L) (N9/L) (N9/L) (Ng/L) (Ng/L) (Ng/L) (Ng/L) <br /> Grab Groundwater Samples <br /> W-34-SVE1 09/26/11 <100 <100 <100 <1,000 <100 <100 <10,000 <br /> W-34.5-SVE2 09/26/11 <500 <500 <500 <5,000 <500 <500 <50,000 <br /> W-35-AS3 09/20/11 <1,000 <1,000 <1,000 <10,000 <1,000 <1,000 <100,000 -- <br /> W-45-AS4 08/24/11 <500 <500 <500 <5,000 <500 <500 <50,000 — <br /> W-35-SVE5 08/31/11 <2,5 <2.5 <2.5 34 <2.5 <2.5 <250 <br /> W-35-AS6 09/26/11 <500 <500 <500 <5,000 <500 <500 <50,000 --- <br /> Notes: <br /> TOC = Top of well casing elevation. <br /> DTW = Depth to water. <br /> GW Elev. = Groundwater elevation. <br /> NAPL = Non-aqueous phase liquid. <br /> TPHd = Total petroleum hydrocarbons as diesel analyzed using EPA Method 8015(modified). <br /> TPHg = Total petroleum hydrocarbons as gasoline analyzed using EPA Method 8015B. Prior to 2002,analyzed using EPA Method 8015(modified). <br /> MTBE = Methyl tertiary butyl ether analyzed using EPA Method 8260B. <br /> BTEX = Benzene,toluene,ethylbenzene,and total xylenes analyzed using EPA Method 82606;analyzed using EPA Method 8021B during first quarter 2009. <br /> PCBs = Polychlorinated biphenyls analysis as Aroclors by EPA Method 8082 includes PCB types 1016,1221,1232,1242, 1248,1254,and 1260. <br /> SVOCs = Semi-volatile organic compounds. <br /> ETBE = Ethyl tertiary butyl ether analyzed using EPA Method 8260B. <br /> TAME = Tertiary amyl methyl ether analyzed using EPA Method 8260B. <br /> TBA = Tertiary butyl alcohol analyzed using EPA Method 82608. <br /> EDB = 1,2-dibromoethane analyzed using EPA Method 8260B. <br /> 1,2-DCA = 1,2-dichloroethane analyzed using EPA Method 8260B. <br /> DIPE = Di-isopropyl ether analyzed using EPA Method 82608. <br /> Ethanol = Ethanol analyzed using EPA Method 8260B. <br /> Metals = Metals analyzed using EPA Method 60106;prior to May 2011,analyzed using EPA Method 6020. <br /> Ng/L = Micrograms per liter. <br /> ND = Not detected at or above tee laboratory reporting limit. See laboratory analytical report for complete list of analytes and method reporting limits. <br /> -- = Not measured/Not sampled/Not analyzed. <br /> < = Less than the stated laboratory reporting limit. <br /> a = The sample extract was subjected to silica gel treatment prior to analysis. <br /> b = Sample received after recommended holding time. <br /> C = Compound did not meet method-described identification guidelines.Identification was based on additional GC/MS characteristics. <br /> d = The sample chromatographic pattern does not match that of the specified standard. <br /> e = Secondary ion abundances were outside method requirements.Identification based on analytical judgment. <br /> f = Analyte was present in the associated method blank. <br /> 9 = Hydrocarbon result partly due to individual peak(s)in quantitation range. <br />