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r �rM CMd%vdwioDAWd Ai0cal Mts M r r I% a r <br /> Farmer ai Service Stratton#5098 <br /> 5606 Pacific Avenue <br /> Stockton, California <br /> Groundwater monitoring data and laboratory analytical results prior to September 15, 1998, were compiled from reports prepared by MPDS Services, Inc <br /> TOC - Top of Casing B s Benzene ppb m Parts per billion <br /> DTW s Depth to Water T = Toluene ND - Not Detected <br /> (ft) m Feet E - Ethylbenzene -- Not MeasuredlNot Analyzed <br /> GWE a Groundwater Elevation X - Xylenes <br /> msl - Relative to mean sea level MTBE - Methyl tertiary butyl ether <br /> TPH(G) - Total Petroleum Hydrocarbons as Gasoline 1,2-DCE - 1,2-Dichloroethene <br /> TOC elevations have been surveyed relative to mean sea level (msl)per the City of Stockton Benchmark No 14 (Elevation a 10.95 feet msl). Prior to June 28, 1993, the DTW <br /> measurements were taken from the top of well covers <br /> i Well has been destroyed <br /> 2 Nitrates were ND, and coliform bacteria were below detection limits. <br /> = All EPA Method 8010 constituents were ND. except for concentrations of bromodichloromethane at 0 53 ppb, chloroform at 1.4 ppb,and <br /> dibromochloromethane at 0.97 ppb. <br /> ` Laboratory has potentially identified the presence of MTBE at reportable levels in the groundwater sample collected from this well. <br /> s Laboratory has identified the presence of MTBE at a level above or equal to the taste and odor threshold of 40 ppb in the sample collected from this well <br /> 6 Laboratory report indicates the hydrocarbons detected appeared to be a gasoline and non-gasoline mixture <br /> 7 MTBE by EPA Method 8260 <br /> d Detection limit raised Refer to analytical results <br /> 9 All EPA Method 8010 constituents were AID <br /> io Laboratory report indicates unidentified hydrocarbons C6-C8 <br /> ii Sampled by Environmental Audit, Inc <br /> i= Laboratory report indicates a chromatogram pattern of gasoline C6-C12. <br /> 5098.xIsIN280046 8 As of 06/17/99 <br />