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i • <br /> Mr. Mike Infurna <br /> January 13 , 1992 <br /> Page 3 <br /> KEI has completed the tasks listed above. The results of our site <br /> inspection and file review are as follows. <br /> 1. On May 18, 1991, a representative of KEI inspected the <br /> subject site to determine the condition of all of the <br /> remaining monitoring wells. Wells RW1, MW2, MW8, and off- <br /> site well MW6 were monitored and found to be dry. The <br /> total depths of these wells ranged between 47.72 and 58 . 50 <br /> feet below ground surface. Wells MW2 and MW8 have <br /> suffered wellhead damage during the site excavation and <br /> were unsecured. Wells MW4 and MW5 appear to be located <br /> underneath the office building that has recently been <br /> constructed on the site. Well MW9 appears to have been <br /> paved over during construction of a parking lot for the <br /> new office building. The condition of the wells obscured <br /> by the building and parking lot are unknown to KEI. Well <br /> MW3 was unable to be located despite considerable hand and <br /> backhoe excavation in the vicinity of this well. In <br /> addition, as previously mentioned, wells MW1 and MW7 were <br /> properly destroyed during the soil excavation project that <br /> was performed at the site. <br /> 2 . Based upon our site inspection, KEI recommended that all <br /> of the on-site wells that have been located (MW2 , MW8, and <br /> RW1) be properly destroyed. It is KEI 's opinion that the <br /> damage inflicted on these wells during the construction of <br /> the new office building is severe enough that any future <br /> sampling results obtained from these wells may not be <br /> representative of the actual conditions at the site. Well <br /> MW6 appears to be in tact and will remain as is; however, <br /> this well was dry on the date of the site inspection. <br /> Therefore, KEI recommended that four new monitoring wells <br /> be installed at the site in order to determine the present <br /> ground water quality at the site. The details of the <br /> proposed new monitoring wells are presented in KEI 's work <br /> plan (KEI-P88-1013 . P2) dated August 23, 1991. Locations <br /> for the proposed new monitoring wells are shown on the <br /> attached Site Plan, Figure 4 . <br /> 3 . A review of all past or present environmental <br /> investigations performed in the vicinity of the subject <br /> site has been conducted. The review of SJCPHS files <br /> revealed that four sites in the area have conducted, or <br /> are presently conducting, subsurface investigations. <br /> These sites are as follows; 1) a Chevron service station, <br /> located at the corner off Pershing Avenue and Robinhood <br /> Drive, 2) a Shell service station, located at the corner <br /> of Pacific Avenue and Porter Avenue, 3) a former Regal <br /> (now Exxon) service station, located at the corner of <br />