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(�Wlogcol Tecknks Inc Page 5 ' Groundwater Monitonng Report Project No 724 2 March 29,2005 1 2.0 FINDINGS AND DISCUSSION ' The results of the groundwater sample analyses indicate the following ' 1 Non-detect Well • Wells MW-1, MW-4, MW-5, MW-I1, MW-104, MW-110, MW-111 and MW- 210 did not contain petroleum hydrocarbon contarrunants above the laboratory ' reporting limits 2 Dry Well ' • Well MW-6 was dry and was not sampled 3 TPH-G • Wells MW-2 (120 0 ltg/L TPH-G) and MW-3 were the only wells found detected (in shallow wells) for TPH-g contaminants • Intermediate wells MW-106, MW-107 and MW-108 contained 160, 120 and 810 [tg/l TPH-G, respectively ' • Deep well MW-208 contained 880 µg/1 of TPH-G 4 MTBE • MW-7 has been detected for MTBE (3 0 [tg/]L) among the shallow wells • Intermediate wells MW-106, MW-107 and MW-109 contained 23 0, 6 6 and 15 µg/1 MTBE, respectively • Deep well MW-209 contained 8 8 µg/1 of MTBE ' 5 Benzene • MW-2 (1 3 [.g/1) and MW-3 (0 9 µg/1) has been detected for Benzene among the ' shallow wells • Intermediate wells MW-106 and MW-107 contained 0 76 and 0 55 ltg/l Benzene, respectively • Deep well MW-208 contained 9 9 µg/1 of Benzene, and also contains 0 63 µg/l of Toluene and 14 µg/1 of total xylenes ' The distribution of groundwater contaminants is summarized as follows (Note The Isoconcentration contours are generated utilizing the SURFER® computer ' modeling program We recognize that computer generated contour maps do not provide the most accurate representation of what is taking place in the field However, even hand- contoured map at best provide a shadow of reality Both need to be looked at as ' interpretation, not reality) 1 TPH-G ' • Only MW-2 (120 0 µg/L TPH-G) and MW-3 (71 µg/L TPH-G) were the only wells found detected for TPH-g contaminants above the laboratory reporting lrrrnts A contour diagram was not plotted because of the limited data