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I 1I � <br /> I <br /> Table 1 <br /> Groundwater Monitoring Data and Analytical Results _ <br /> Former Unocal Service Station#2859 <br /> 1665 Pacific Avenue ` <br /> j Stockton, California <br /> v I Ig <br /> EXPLANATIONS. <br /> Groundwater monitoring data and laboratory analytical results prior to March 6, 1998, were compiled from reports prepared by MPDS Services, Inc <br /> 'F I IE <br /> TOC = Top of Casing elevation �, B =Benzene ` ppb = Parts per billion <br /> DTW = Depth to Water l T =IToluene ND = Not Detected _ <br /> (ft) = Feet E =Pthylbenzene -- = Not Measured/Not Analyzed <br /> GWE = Groundwater Elevation X = ylenes D = Duplicate <br /> msl = Relative to mean sea level j MTBE = Methyl tertiary butyl ether EB = Equipment Blank <br /> TPH(G) = Total Petroleum Hydrocarbons as Gasoline I <br /> * TOC elevations have been surveyed relative to mean sea level On February 10, 1999, TOC measurements were re-surveyed relative to-City of Stockton BM#24, msl <br /> i Laboratory report indicates the hydrocarbons detected appeared to be a gasoline and non-gasoline mixture <br /> z Laboratory report indicates the hydrocarbons detected did not appear to tie gasoline <br /> 3 Detection limit raised Refer to analytical reports <br /> a MTBE by EPA Method 8260 <br /> 5 Laboratory report indicates unidentified hydrocarbons C6-C12 - u <br /> 6Laboratory report indicates gasoline and unidentified hydrocarbons C8 <br /> Well development only f I� II - <br /> s laboratory report indicates gasoline and unidentified hydrocarboas C6-C l2 _ <br /> 9 I <br /> Laboratory report indicates discrete peaks I <br /> i° Laboratory report indicates gasoline C6-C12 _ <br /> I <br /> ANALYTICAL METHODS. <br /> t k <br /> EPA Method 8015 for TPH(G) � <br /> EPA Method 8020 for BTEX and MTBE except where noted ; <br /> EPA Method 8260 for MTBE where noted <br /> i <br /> i 1 - <br /> , I - <br /> 1 <br /> - <br /> 2$59 A00054 I y A Ii7/0o <br />