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TABLE 1 - GROUNDWATER MONITORIN(`""a\D CHEMICAL ANALYTICAL DATA Aw <br /> Tosco (Former BP) Service Station No.11195 <br /> 16500 South Interstate-5 <br /> Lathrop, California <br /> Total Well Depth Ground <br /> Well Elev. to Floating Water Ethyl- Total <br /> Sample Sample Depth (ft. Water Product Elevation TPHg Benzene Toluene benzene Xylenes <br /> No. Date (ft.) MSL) (ft.) (ft.) ft.MSL b) b) (ppb) b) (ppb) <br /> MW-18 2/13/2003 19.37 12.29 8.48 0.00 3.81 <50 <0.50 <0.50 <0.50 <1.0 <br /> MW-19 2/13/2003 19.65 12.84 8.95 0.00 3.89 60Z <0.50 <0.50 <0.50 1.4 <br /> MW-20 2/13/2003 19.89 12.54 8.71 0.00 3.83 <50 <0.50 <0.50 <0.50 <1.0 <br /> MW-21 2/13/2003 19.76 12.80 8.05 0.00 4.75 <50 <0.50 <0.50 <0.50 <1.0 <br /> EXPLANATION ANALITICAL LABORATORY: <br /> ft.-feet Sevem Trent Laboratory,Pleasanton.CA (FLAP#2496) <br /> ft.MSL=feet relative to Mean Sea Level <br /> ppb=parts per billion <br /> <50=analyte not detected at or above the laboratories reporting limit <br /> i=Well elevations reported as top of casing (TOC) surveyed by Virgil Chavez,Licensed California Land Surveyor No. 6323 <br /> =Laboratory reports that the hydrocarbon reported in the gasoline range does not match the laboratories gasoline standard. <br /> E <br /> TPHg=Total Petroleum Hydrocarbons as gasoline according to EPA Method 8260B <br /> Benzene, Toluene,Ethylbenzene, and Total Xylenes according to EPA Method 8260B <br /> 140193.14-2 <br />