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i <br /> Table 2 <br /> HISTORIC GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS <br /> September 2003 Through March 2004 <br /> Former 76 Station 6981 <br /> Date TQC Depth to LPH Ground- Change in TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments <br /> Sampled Elevation Water Thickness water Elevation 8260B benzene Xylenes 8021B 8260B <br /> Elevation <br /> (feet) (feet) (feet) (feet) (feet) (µg/1) (pg/1) (µg11) (µgll) (µfill) (µg11) (Agll) (Agll) <br /> MW-1 (Screen Interval in feet 510-55 0) <br /> 9124/03 1107 3322 000 -22 15 -- ND<50 ND<0 50 088 ND<0 50 ND<1 0 ND<50 <br /> 12/30/03 1107 32 85 000 -21 78 037 ND<50 ND<0 50 064 052 1 5 ND<2 0 <br /> 3/9/04 1107 31 91 000 -2084 094 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<2 0 <br /> MW-2 (Screen Interval in feet 51 0-55 0) <br /> 9/24/03 11 56 3478 000 -2322 -- 2100 81 ND<2 5 70 97 10 <br /> 12/30/03 11 56 3423 000 -2267 055 370 12 055 ND<0 50 21 5 0 <br /> 319104 1156 33 34 000 -2178 0 89 200 9 2 ND<0 50 ND<0 50 3 3 3 2 <br /> MW4 , (Screen Interval in feet 51 0-55 0) <br /> 9124/03 1163 3401 000 -2238 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<2 0 <br /> 12/30/03 1163 33 51 000 -2188 050 ND<50 ND<0 50 076 ND<0 50 2 5 21 <br /> 3/9104 1163 3260 000 -2097 091 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 ND<2 0 <br /> MW-5 (Screen Interval in feet 50 0-55 0) <br /> 9124103 1152 3401 000 -2249 -- ND<50 ND<0 50 056 ND<0 50 ND<1 0 ND<2 0 <br /> 12/30/03 1152 33 58 000 -22 06 043 57 ND<0 50 ND<0 50 ND<0 50 ND<l 0 ND<2 0 <br /> 319104 1152 3257 000 -2105 101 ND<50 ND<0 50 1 5 ND<0 50 24 ND<2 0 <br /> 3 <br /> MW-6 (Screen Interval in feet 49 0-69 0) <br /> 9/24/03 1143 3282 000 -2139 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 ND<2 0 <br /> 12/30/03 1143 3326 000 -21 83 -044 ND<50 ND<0 50 1 1 ND<0 50 18 ND<2 0 <br /> 319104 1143 3241 000 -2098 0 85 ND<50 ND<0 50 ND<0 50 ND<O 50 1 5 ND<2 0 <br /> MW-7 '(Screen interval in feet 49 0-69 0) <br /> 9124103 11 82 3458 000 -22 76 ND<50 ND<0 50 062 ND<0 50 ND<1 0 ND<2 0 <br /> 12/30/03 11 82 3406 000 -2224 052 ND<50 056 2 9 0 70 33 ND<2 0 <br /> 3/9104 11 82 33 11 000 -21 29 095 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 ND<2 0 <br /> MW-8 (Screen Interval in feet 49 0-69 0) <br /> 9124103 1038 3239 000 -2201 -- ND<50 ND<0 50 1 1 ND<0 50 ND<1 0 ND<2 0 <br /> 6981 Pagel of 3 <br /> i <br />