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tiAMR <br /> . <br /> TABLE 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). (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 NA NA <br /> 03/08/95 20.0 45.00 10.05 34.95 ---- 3,900 730 510 140 430 NA NA <br /> 05/17/95 20.0 45.00 10.02 34.98 ---- 400✓ 1-120 -36 ✓12 A3 NA NA <br /> MW-2 09/16/94 19.5 44.98 10.07 34.91 --- 7,600 370 180 260 680 NA NA <br /> 03/08/95 19.5 44.98 10.12 34.86 ---- 1,000 180 47 57 1180 NA NA <br /> 05/17/95 19.5 44.98 10.08 34.90 ---- 100v 37- 11,E 5.5,- 21 - NA NA <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 /> 05/17/95 19.5 45.59 10.66 34.93 --- <50 <0.5 <0.5 <0.5 ,<2 <50 <1 <br /> Notes <br /> 'Groundwater depths measured from surveyed top of the north side of the well casing. Well casing elevations surveyed to mean sea level (MSL) by Virgil Chavez Land Surveying <br /> (PLS No. 6323). <br /> TPHg = Total petroleum hydrocarbons as gasoline ppb = parts per billion <br /> TPHd = Total petroleum hydrocarbons as diesel ppm = parts per milliom <br /> O&G = Oil and Grease ft. = feet <br /> NA = Not analyzed <br /> 8146.02-2 <br />