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} o c <br /> 1 Water Level Data and Ground Water Analytic Results - Former Chevron Service Station #9-0959, 103 West 11th <br /> Street, Tracy, California (continued) <br /> DTW GWE Product Analytic TPPH(G) B T E X <br /> t) Date (ft) (msl) Thickness' Method <------------------------------------ppb-----------------------------------> <br /> 31ank <br /> 3/23/93 --- --- --- 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 <br /> 6/22/93 --- --- --- 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 <br /> 8/13/93 --- - --- 6015/8020 <50 <0 5 <0 5 <0 5 <0 5 <br /> 11/18/93 --- --- --- 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/15/94 --- --- -- 8015/8020 <50 <0 5 <0 5 <0 5 <0 5 <br /> VATION NOTES <br /> DTW=Depth to water Product thickness was measured with an MMC flexi-dip interface <br /> rOC=Top of casing elevation probe <br />;,WE=Ground water elevation <br />'nsl=Measurements referenced relative to mean sea level Top of casing elevations and analytic data prior to March 23 1993 <br /> rPPH(G)=Total Purgeable Petroleum Hydrocarbons as Gasoline were compiled from the Environmental Assessment Report prepared <br /> 3=Benzene for Chevron by Groundwater Technology Inc ,January 7 1993 <br /> r=Toluene <br /> =Ethylbenzene ' Laboratory reports a hydrocarbon pattern not characteristic of <br /> K=Xylenes gasoline <br /> ppb=Parts per billion <br />-- =Not analyzed/Not applicable 2 Top of casing elevations resurveyed February 23 1994 by Ron <br /> Miller P E #115816 <br /> rIC METHODS <br /> s Water level measurement only was collected due to apparent <br /> 3015=EPA Method 8015/5030 for TPPH(G) obstruction in well <br /> 3020=EPA Method 8020 for BTEX <br /> 7IA <br />