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25 October 2001 AGE-NC Project No 97-0301 ' Page 4 of 7 P-10 and submitted for laboratory analysis for the above mentioned constituents At least one grab water sample was collected from each informal hydrologic flow unit at each boring Six grab water samples were collected from First Water Zone(P5-40 to 50, P6-35 to 50, P7-36 to 40,P8-36 to 40, P9-40 to 45 and P10-36 to 40), six grab water samples were collected from Second Water Zone (P5-70 to 80,P6-68 to 73,P7-62 to 35, P8-64 to 67,P9-64 to 67 and P10-62 to 67), six grab water samples were collected from Third Water Zone (P5-95 to 105, P6-90 to 95, P7-94 to 97,P8-96 to ' 99,P9-88 to 95 and P 10-90 to 100), and six grab water samples were collected from Fourth Water Zone(P5-120 to 125,P6-120 to 125, P7-121 to 125, P8-116 to 120, P9-117 to 120 and P10-120 to 125) Table 1 shows the sample identification, sampling depth and the associated informal hydrologic flow unit designation TPH-g was detected in three P-5 water samples collected from First, Second and Fourth Water ' Zones at concentrations as high as 590 micrograms per liter (µg11), in two P-7 water samples collected from First and Second Water Zones at concentrations as high as 3,200 Ag/l, in one P-9 water sample collected from First Water Zone at a concentration of 720µg11, and in one P-10 water ' sample collected from Third Water Zone at a concentration of 94µgll The laboratory reported the First Water Zone sample chromatograms from P-5,the First and Second Water Zone samples from P-7,the First Water Zone sample from P-9 and the Third Water Zone sample from P-10 as having significant unmodified or weakly modified gasoline The laboratory reported the Second and Fourth Water Zone sample chromatograms from P-5 as having heavier gasoline-range compounds I ' TPH-d was detected in two P-5 water samples collected from First and Fourth Water Zones at concentrations as high as 330µg/1, in two P-6 water samples collected from First and Fourth Water ' Zones at concentrations as high as 190 µg/1, In two P-7 water samples collected from First and Second Water Zones at concentrations as high as 780µg/l, in two P-8 water samples collected from Third and Fourth Water Zones at concentrations as high as 61 1,4g11, and in two P-9 water samples collected from First and Second Water Zones at concentrations as high as 130µg/1 The laboratory reported the First and Fourth Water sample chromatograms from P-5,the First Water Zone sample from P-7 and the First Water Zone sample from P-9 as having slgmficant gasoline range compounds ' The laboratory reported the First Water Zone sample chromatogram from P-6 and the Third Water Zone sample from P-8 as being more consistent with kerosene The laboratory also reported the Fourth Water Zone sample chromatograms from P-6, the Second Water Zone sample from P-7, the Fourth Water Zone sample from P-8 and the First and Second Water Zone samples from P-9 as having significant diesel-range compounds Various BTEX compounds were detected in three P-5 water samples collected from First, Second and Fourth Water Zones at concentrations as high as 59µg11, in three P-7 water samples collected from First, Second and Third Water Zones at concentrations as high as 18 µg/1, in one P-8 ' intermediate water sample collected between Second and Third Water Zones at a concentration of 6 6 µg11, in one P-9 water sample collected from First Water Zone at concentrations as high as 99 Advanced GeoEnvironmentat,Inc