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1 <br /> HISTORICAL GROUNDWATER DATA <br /> Former Discovery Chevrolet <br /> 1615 11th Street <br /> Tracy, California <br /> Ethyl <br /> Well Date Total Well Depth to Groundwater Floating TPHg Benzene Toluene benzene Xylenes TPHd O&G <br /> No. Sampled Depth Elevation water Elevation Product <br /> (ft.) (ft.) (ft.) (ft.) (ft)• (Ppb) (Ppb) (Ppb) (Ppb) (Ppb) (Ppb) (Ppm) <br /> MW-1 09/16/94 20.0 45.00 9.97 35.03 ---- 640 35 40 6.8 72 NR NR <br /> 03/08/95 20.0 45.00 10.05 34.95 ---- 3,900 730 510 140 430 NR NR <br /> MW-2 09/16/94 19.5 44.98 10.07 34.91 ---- 7,600 370 180 260 680 NR NR <br /> 03/08/95 19.5 44.98 10.12 34.86 ---- 1,000 180 47 57 1180 NR NR <br /> MW-3 09/16/94 19.5 45.59 10.49 35.10 ---- <50 <0.5 <0.5 <0.5 <0.5 <50 <10 <br /> 03/08/95 19.5 45.59 10.65 34-94 --- <50 <0.5 <0.5 <0.5 <0.5 200 <1 <br /> Notes <br /> 1.Groundwater depths measured from surveyed top of well casing. .Well casing elevations <br /> Surveyed to mean sea level (MSL) by Virgil Chavez Land Surveying (PLS no. 6323). <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> TPHd = Total petroleum hydrocarbons as diesel <br /> O&G = Oil and Grease <br /> ppb = parts per billion <br /> ppm = parts per million <br /> ft. = feet <br /> 8146.02-1 <br />