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�i Geologccal7'tc/aucslru. Page 5 i Groundwater Monitonng Report ' Project No 724 2 May 16,2005 L1 The detection limits for the above analyses are listed in Table 5 of Appendix A, while the lab I analytical results are presented in Appendix B As required under AB2886, the laboratory data was submitted electronically to GeoTracker i on May 16, 2005 (confirmation #4017810225) and groundwater elevation was submitted electronically to GeoTracker on May 16, 2005 (confirmation#3098728775) I 2.0 FINDINGS AND DISCUSSION ' The results of the groundwater sample analyses indicate the following 1 Non-detect Well I " • Wells - MW-7, MW-11, MW-109, MW-110, MW-111, MW-202, MW-209 and MW-210 did not contain petroleum hydrocarbon contaminants above the laboratory reporting limits 2 TPH-G • Wells MW-2 (63 0 µg/L TPH-G) was the only well where TPG-g contaminants were found (in shallow wells) ' • Intermediate wells MW-106, MW-107 and MW-108 contained 170, 87 and 80 µg11 of TPH-G, respectively • Deep well MW-208 contained 600 Rg/1 of TPH-G ' 3 MTBE • MTBE (3 0 µg/L) was found in one shallow well, MW-7 • Intermediate wells MW-106, MW-107 and MW-109 contained 23 0, 6 6 and 15 ` 4 µg/1 MTBE, respectively • Deep well MW-209 contained 8 8 µg/1 of MTBE 4 Benzene • Benzene was not detected in any of the shallow wells • Intermediate wells MW-106 and MW-108 contained 2 10 and 1 1 µg/l Benzene, L �" respectively • Deep well MW-208 contained 6 1 µg/1 of Benzene, and also contains 0 89 µg/1 of total xylenes I 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 I most accurate representation of what is taking place in the field However, even hand- r contoured map at best provide a shadow of reality Both need to be looked at as interpretation, not reality) I � L