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rw 09 January 2003 AGE-NC Project No. 95-0114 Page 5 of 9 Hydrological units are depicted in cross sectional view A-A' (Figure 3). 3.3. LABORATORY RESULTS OF GRAB GROUND WATER SAMPLES A total of eighteen discrete, grab ground water samples was collected from HU1, HU2, HU4 and HU6 and submitted for laboratory analysis for the constituents listed in Section 2.2 (Table 1): HU1 Samples CPT3-45 and CPT7-50 were collected from HUL Only the volatile organic compounds (VOCs) tetrachloroethene (PCE), trichloroethane (TCE) and cis 1,2-dichloroethane (cis 1,2-DCE) were detected, in sample CPT3-45 at concentrations of 99 micrograms per liter(µg/1), 19 µg/1 and 21 µg11, respectively. . HU2 Samples CPT3-62, CPT5-50 and CPT6-50 were collected from HU2. TPH-ss was detected in samples CPT3-62 and CPT5-50 at concentrations of 110µg/1 and 300µg/l,respectively.In addition, the VOCs PCE and TCE were detected in samples CPT5-50 and CPT6-50 at maximum concentrations of 270 µg11 and 130 µg11,respectively(sample CPT5-50),cis 1,2-DCE was detected in sample CPT5-50 at 120 µg11, and 1,2-dichloropropane was detected in sample CPT3-62 at 2.2 µg11. HU4 Samples CPT1-80,CPT2-75,CPT4-75,CPT5-70,CPT6-77 and CPT7-80 were collected from HU4. TPH-ss was detected in CPT1-80, CPT2-75 and CPT4-75 at a maximum concentration of 130µg11 (CPT1-80 and CPT2-75).The VOC PCE was detected in samples CPT4-75 and CPT7-80 at 6.1 µg11 . and 3.0 µg/1, respectively. In addition, cis 1,2-DCE and TCE were detected in sample CPT4-75 at 7.7 µg11 and 5.4 µg11, respectively. HU6 Samples CPT1-120,CPT2-115,CPT3-110, CPT4-110, CPT5-120,CPT6-120 and CPT7-120 were collected from HU6. TPH-ss was detected in samples CPT1-120, CPT2-115, CPT3-110 and CPT4-110 at a maximum concentration of 360µg/1 (CPT1-120). PCE was detected in samples Advanced GeoEnvironmental,Inc.