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TABLE 1 <br /> HISTORICAL GROUNDWATER DATA <br /> Former Discovery Chevrolet <br /> 161511th Street <br /> Tracy, California <br /> Ethyl <br /> Well Date Total Well Depth to Groundwater Floating TPfIg Benzene Toluene benzene Xylenes TPHd O& <br /> No. Sampled Depth Elevation' water' Elevation Product <br /> (ft). (ppb) (ppb) (Ppb) (Ppb) (Ppb) (Ppb) (PPi <br /> MW-1 . 09/16/94 20.0 45,00 9,97 35.03 ---- 640 35 40 6.8 72 NA NA <br /> 03108/95 20.0 45.00 10.05 34.95 ---- 3,900 730 510 140 430 NA NA <br /> 05117/95 20.0 45.00 10.02 34.98 ---- 400 120 36 12 43 NA NA- <br /> MW-2 09f E6/94 19.5 44.98 10.07 34.91 ---- -7,600 - 370 180 240 680 NA NA <br /> 03f08/95 19.5 44.98 10.12 34.86 ---- 1.000 180,- 47 57 1180 NA NA <br /> 05f17195 19.5 44.98 10.48 34.90 ---- 100 37 11 5.5 21 NA NA <br /> MW-3 09f(6/94 19.5 45.59 10.49 35.10 <50 <0.5 <0.5 <0.5 <0.5 <50 <10 <br /> O3f08/95 19.5 45.59 10.65 34.94 ---- <50 <0.5 <0.5 <0.5 <0.5 240 <1 <br /> 05/17/95 19.5 45.59 10.66 34.93 --- <50 <0.5 <0.5 X0.5 <2 <50 <1 <br /> Nrnra <br /> '(­oundwate r 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 Surveyin <br /> (PLS No. 63 23). <br /> TPHS 'Total petroleum hydrocarbons as gasoline ppb = parts per billion <br /> I'M Total petroleum hydrocarbons as diesel ppm = parts per milliom <br /> 0 0&0 += Oil to d Grease ft. = feet ' <br /> D NA'-.Not analyzed <br /> r <br /> z) <br /> M <br /> 0 8146.02-2 <br /> L <br />