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I stockton Plating Inc. <br /> Soil & Groundwater Investigation <br /> April 29, 1494 <br /> Page - 12 - <br /> 1 10 <br /> TABLE 2 <br /> Laboratory Results - Groundwater Samples (2/22/94) <br /> B T E % TPH-G TEPH DTW ELEV <br /> Sample Location Detection 0.3 0.3 0 3 0.6 0.5 0 5 <br /> Limits- Ng/l Pg/l 9g/l Pg/l mg/l mg/1 <br /> MW-1 2 . 0 3. 1 1. 6 1. 7 ND ND 45 . 97 52.86 <br /> I (99 83)# <br /> xw-2 3 .5 1.2 ND ND ND ND 46 . 42 52.53 <br /> (98.95) <br /> MW-3 13, 000* 7, 500* ND ND 48* ND46 .40 52.60 <br /> (99.00) <br /> lin t Conversions Chemical Analyses <br /> pg kg:parts per billion (ppb) B,T,E,X - benzene, toluene, ethyl benzene, and xylene. <br />' mg/kg.parts per million (ppm) TEPH - total extractable petroleum hydrocarbons, quantified as kerosene, <br /> diesel and motor oil <br /> TPH-G - total petroleum hydrocarbons, quantified as gasoline <br /> * - detection limit raised due to high gasoline concen+,rations. <br /> ND - none detected at or above laboratory detection limits. <br /> Groundwater Elevation Data <br /> (99.11)4 a we collar elevation based on assumed bench mark of 300 feet mal. <br /> DTW - Depth-to-water measured from well collar. <br /> ELEV - elevation of groundwater table based on DTW measurements and <br /> assumed bench mark. <br /> Laboratory analyses indicate that 48 mg/1 TPH--G and BTEX <br /> concentrations ranging to 13,000 µg/l were detected in the <br /> groundwater sample collected from MW3 . Lower concentrations of <br /> BTEX were detected in MW1 and MW2 . TEPH was not detected at <br /> Ilaboratory detection limits in any of the groundwater samples . <br /> 6.0 GROUNDWATER GRADIENT <br /> Groundwater at the site occurs at a depth of approximately <br /> 47 feet. The groundwater gradient was 0 . 002 ( 0 .201/ 1001 ) and <br /> toward the east-northeast based on water level measurements <br /> I <br /> j� CONDOR <br />