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l. <br /> TABLE 1 <br /> IRSTORICAL GROUNDWATER DATA <br /> Former Discovery Chevrolet <br /> 1615 II b Street <br /> Tracy, California <br /> Explanation: <br /> TPHg = Total Petroleum Hydrocarbons as gasoline Analytical Laboratory: American Environmental Network(FLAP#1172) <br /> TPHd = Total Petroleum Hydrocarbons as diesel <br /> O&G = Oil and Grease Analytical Methods: <br /> BTEX Benzene, Toluene, Ethylbenzene, and total Xylenes TPHg: EPA Methods503018015 (GCFID) <br /> MTBE = Methyl t-Butly Ether TPHd: EPA Method 3510/8015(GCFID) <br /> nd = none detected at or above laboratory reporting limits BTEXIMTBE: EPA Method 8020 <br /> ppb = parts per billion O&G: Standard MEthod 5520 B&F <br /> ft. = feet Chlorinated Halocarbons: EPA 8010 <br /> na = not analyzed <br /> 1 Measured from surveyed top of the north side of the well casing. Well casing elevations surveyed to MSL by Virgil Chavez Land Surveying(PLS#6323). <br /> 8146.03-3 <br /> Page 2 of 2 <br />