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f Table 1 SUMMARY OF GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS December 30,2003 Former 76 Station 6981 Date TOC Depth to LPH Ground- Change in TPI -G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water Elevation 8260B benzene Xylenes 8021B 8260E Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/1) (41) (µg11) (µg11) (µg/1) (µg/1) (µg/1) MW-1 (Screen Interval in feet 510-55 0) 12/30/03 1107 32 85 0 00 -21 78 037 -- ND<50 ND<O 50 0 64 052 1 5 -- ND<2 0 MW-2 (Screen Interval in feet 510-55 0) 12/30/03 1156 3423 0 00 -2267 055 -- 370 12 0 55 ND<O 50 21 5 0 MW-4 (Screen Interval in feet 510-55 0) 12/30/03 1163 33 51 000 -2188 050 -- ND<50 ND<O 50 076 ND<O 50 25 -- 21 a MW-5 (Screen Interval in feet 50 0-55 0) 12/30/03 1152 33 58 1 000 -22 06 043 57 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- ND<2 0 MW-6 (Screen Interval in feet 49 0-69 0) 12/30/03 1143 33 26 000 -2183 -044 -- ND<50 ND<O 50 1 1 ND<O 50 18 -- ND<2 0 MW-7 '(Screen Interval in feet 49 0.69 0) 12/30/03 1182 3406 000 -22 24 0 52 -- ND<50 056 29 0 70 3 3 -- ND<2 0 MW-8 (Screen interval in feet 49 0-69 0) 12/30/03 1038 ' 3196 000 -2158 043 -- ND<50 ND<O 50 13 068 2 3 -- NDQ 0 MW-9 (Screen Interval to feet 50 0-70 0) 12/30/03 1176 33 54 000 -21 78 042 -- 77 ND<O 50 13 ND<0 50 19 -- ND<2 0 MW-11 (Screen Interval in feet 54 0-72 0) 12/30/03 1123 3388 0 00 -22 65 0 59 -- -- -- -- __ -- .. __ Inaccessible MW-14 (Screen Interval in feet 18 0-38 0) 12/30/03 1159 3390 000 -2231 0 57 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- 2 6 MW-15 '(Screen Interval in feet 18 0-38 0) 12/30/03 1137 3 34 02 000 -2265 062 -- 100 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- 63 MW-16 1(Scrcen Interval in feet 18 0-38 0) 12/30/03 1220 3431 000 -2211 050 -- 200 32 ND<2 0 5 6 9 6 -- 22 PTW-1 (Screen Interval in feet 52 5.72 5) 6981 Page 1 of 2