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' Geolagual Terltxics lxc Page 5 Groundwater Monitonng Report ' Project No 724 2 Apn125,2006 The detection limits for the above analyses are listed in Table 5A--- 5C of Appendix A, while the lab analytical results are presented in Appendix B As required under AB2886, the laboratory data and groundwater elevation were submitted ' electronically to GeoTracker on April 20, 2006 (confirmation #'s 4613566935 and 3882171452, respectively) ' 2.0 FINDINGS AND DISCUSSION ' The results of the groundwater sample analyses indicate the following 1 Non-detect Wells ' • Wells — MW-1, MW-4, MW-5, MW-6, MW-11, MW-104, MW-110, MW-111 and MW-202 did not contain petroleum hydrocarbon contaminants above the laboratory reporting limits 2 TPH-G • TPH-G was not detected in any of the shallow wells • Intermediate wells MW-2, MW-3, MW-106, MW-107 and MW-108 contained 73 2, 50 8, 87 1, 68 3 and 98 3 µg/1 of TPH-G,respectively o Deep wells MW-208 contained 1580 [.g/1 of TPH-G 3 MTBE C Shallow well MW-7 contained 0 7 Rg/l MTBE O Intermediate wells MW-106, MW-107 and MW-109 contained 17 3, 2 4 and 19 ' [g/1 MTBE, respectively • Deep well MW-209 contained 4 µg/1 of MTBE 4 Benzene • Benzene was not detected in any of the wells above the laboratory reporting limits ' The distribution of groundwater contaminants is summarized as follows (Note The Isoconcentration contours are generated utilizing the SURFER® computer imodeling 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 maps at hest provide a shadow of reality Bath need to be looked at as ' interpretation, not reality ) ' 1 TPH-G • None of the shallow wells contained TPH-G above the laboratory reporting limits and therefore a contour diagram was not produced