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' River Islands at Lathrop 5044.5.001.01 Monitoring Wells MW-13 through MW-22 January 13, 2006 MONITORING WELL LOCATION STUDY Page 3 • November 5, 1999 ' — MW-13,MW-14, MW-15,MW-18, MW-19 and MW-21 were damaged. — MW-17 was not observed. • December 7, 1999 — MW-13, MW-14, MW-18, MW-19 and MW-21 were damaged. — MW-17 was not observed. The approximate locations of the subject monitoring wells are shown in the Kleinfelder 2000 report on their Plates AAA, A-IB, A-1C and A-11). Copies of these plates are attached as an ' Appendix. SITE INVESTIGATION ' Field reconnaissance of the locations of Monitoring Wells MW-13 through MW-22, as shown on the Plates A-lA, A-113, A-1C and A-11) of the Kleinfelder 2000 report, was conducted on October 20 and 21, 2005. The reconnaissance included viewing the property for physical evidence of an existing well and/or remnants of the subject monitoring wells. A summary of our observations are presented below. ' SUMMARY OF FIELD OBSERVATIONS Monitoring Comments ' Well ID MW-13 No physical evidence of existing well; presumed destroyed MW-14 No physical evidence of existing well; presumed destroyed ' MW-15 Well in moderate condition— 1'/2-inch PVC pipe incased by metal pipe MW-16 No physical evidence of existing well; presumed destroyed ' MW-17 No physical evidence of existing well; presumed destroyed (see comments below) MW-18 Well in poor condition— 1-inch PVC pipe incased by a green plastic container MW-19 No physical evidence of existing well; presumed destroyed ' MW-20 Well in moderate condition— 1'/2-inch Plastic PVC pipe without casing MW-21 No physical evidence of existing well; presumed destroyed MW-22 I No physical evidence of existing well; presumed destroyed Based on the findings of the field reconnaissance, Monitoring Wells MW-13, MW-14, MW-16, ' MW-17, MW-19, MW-21 and MW-22 could not be located and appear to have been accidentally destroyed. Following the initial reconnaissance, ENGEO Incorporated performed a limited surface investigation on December 9 and 13, 2005. Exploration activities consisted of ' excavating 12 to 24 inches below the ground surface in the vicinity of the suspected monitoring well (MW-13, MW-14, MW-16, MW-19, MW-21 and MW-22) locations. A summary of our observations are presented below, as well as a summary observation for MW-17.