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Table 1 Water Level Data and Groundwater Analytical Results-Former Chevron Service Station#9-0959, 103 West 11th Street,Tracy, California <br /> j (continued) <br /> Product <br /> Well ID/ DTW GWE Thickness* TPH(G) B T E X MTBE <br /> TOC(ft) Date (ft) (msl) (ft} <_---___---._..........----------.....ppb...-- <br /> Bailer Blank <br /> BB 3123193 — — --- <50 <0 5 <0 5 <05 <05 --- <br /> 6122193 — --- — <50 <05 <05 <05 <05 --- <br /> 8113/93 — — --- <50 <0 5 <05 <05 <0 5 --- <br /> 11/18/93 — — --- <50 <0 5 <05 <05 <0 5 --- <br /> 2/15194 — — — <50 <0 5 <05 <05 <0 5 — <br /> EXPLANATION NOTES <br /> DTW = Depth to water • Product thickness was measured with an MMC flexr-dip interface probe <br /> TOC = Top of casing elevation <br /> GWE = Groundwater elevation Groundwater elevation data and laboratory analytic results prior to March 9, 1995 were <br /> msl = Measurements referenced relative to mean sea level compiled from the Quarterly Groundwater Monitoring Reports prepared for Chevron by <br /> TPH(G) = Total Purgeable Petroleum Hydrocarbons as Gasoline Sierra Enviornmental Services <br /> B = Benzene <br /> T =Toluene ' Laboratory reports a hydrocarbon pattern not characteristic of gasoline <br /> E = Ethylbenzene Z Top of casing elevations resurveyed February 23, 1994 by Ron Miller,P E #15816 <br /> X = Xylenes ' Water level measurement only was collected due to apparent obstruction in well <br /> MTBE = Methyl-tentary-butyl ether ' Hydrocarbons in the gasoline range do not match the gasoline standard pattern <br /> ppb = Parts per billion (GTEL) <br /> -- = Not analyzed/Not applicable s Water level elevation data for this event compiled from the Well Installation Report <br /> prepared for Chevron by Groundwater Technology <br /> ANALYTICAL METHODS a Well was surveyed by Morrow Surveying of West Sacramento,California,April 1995 <br /> TPH(G) = EPA Method 8015/5030 <br /> BTEX = EPA Method 8020 <br /> MTBE = EPA Method 8020 <br /> 5247 TQM <br /> 3 <br />