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Table 2 <br /> HISTORIC GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS <br /> January 2000 Through October 2003 <br /> Former 76 Station 4409 <br /> Date TOC Depth to LPH Ground- Change in TPH-G TPPH Benzene Toluene Ethyl- Total MTBE M7 BE Comments <br /> Sampled Elevation Water Thickness water Elevation 8260B benzene Xylenes 8021B 8260B <br /> Elevation <br /> (feet) (feet) (feet) (feet) (feet) (pg/1) (Ag/1) (µg/1) (µg/1) (gg/l) (µg11) (}ig/l) (Ng/1) <br /> MW-1 (Screen Interval in feet 300-500) <br /> 4/10/2000 1144 2481 000 -1337 — ND -- ND ND ND ND ND ND <br /> 7!512000 1144 2579 000 -1435 -098 ND - ND ND ND ND ND ND <br /> 10/10/2000 1144 2786 000 -1642 -- ND - ND ND ND ND ND ND <br /> 1/22/2001 1144 2767 000 -1623 0 19 ND — ND ND ND ND ND ND <br /> 4/5/2001 1 1 44 27 10 000 -1566 0 57 ND -- ND ND ND ND ND ND <br /> 7/5/2001 1144 2806 000 -1662 -096 ND - ND ND ND ND ND ND <br /> 10/10/2001 l 1 44 3019 000 -1875 -2 13 ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 <br /> 1/17/2002 1144 29 59 000 -18 15 060 ND<50 — ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<1 0 <br /> 4/18/2002 1 l 44 2986 000 -1742 073 ND<50 — ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 <br /> 7/11/2002 1144 2993 000 -1849 -107 ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<I 0 2 5 <br /> 11/14/2002 1 1 44 3271 000 -2127 -278 ND<50 - ND<0 50 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 <br /> 1/30/2003 1144 3183 000 -2039 088 ND<50 — ND<O 50 ND<O 50 ND<O 50 ND<1 0 ND<2 0 <br /> 4/28/2003 1144 31 03 000 -1959 080 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 33 <br /> 7/28/2003 1 1 44 32 54 000 -21 10 -151 — -- - -- -- -- <br /> 10/8/2003 1144 3409 000 -2265 -155 -- ND<50 ND<O 50 ND<O 50 ND<O 50 13 46 <br /> MW-2 (Screen Intern al in feet 25 0-45 0) <br /> 1/5/2000 1268 2970 000 -1702 -- ND -- ND ND ND ND ND <br /> 4/10/2000 1268 2736 000 -1468 234 ND -- ND ND ND ND ND ND <br /> 7/5/2000 1268 2722 000 -14 54 0 14 ND ND ND ND ND ND ND <br /> 10/10/2000 1268 2931 000 -1663 — ND ND ND ND ND ND ND <br /> 1/22/2001 1268 29 15 000 -1647 0 16 ND — ND ND ND ND 328 ND <br /> 4/5/2001 1268 2860 000 -1592 055 ND -- ND ND ND ND ND ND <br /> 715/2001 1269 2952 000 -1684 -092 ND — ND ND ND ND ND ND <br /> 1 D/1012001 1268 3168 000 -1900 -216 ND<50 — ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 <br /> 1/17/2002 12 68 31 11 000 -1843 0 57 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<l 0 <br /> 4409 Page 1 of 6 <br />