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Shell Gas Station Chronology page 3 <br /> 3011 W. Benjamin Holt Dr, Stockton <br /> January 2005 Cambria's December 30, 2004 UST Removal Report details <br /> second UST removal at site. <br /> May 2005 Monitoring well MW-13 installed offsite for lateral/down <br /> gradient investigation. Cambria's May 19, 2004 Site <br /> Investigation Report received on Geotracker May 2005 <br /> details soil and ground water samples which all were non <br /> detect for petroleum. <br /> July 2006 Cambria's July 20, 2005 Updated SCM received on <br /> Geotracker. <br /> March 2006 Cambria's March 20, 2006 Case Closure Summary received <br /> on Geotracker. EHD requests vapor intrusion evaluation <br /> prior to approving NFA. <br /> July 2006 Cambria's June 1, 2006 Closure Addendum —Vapor <br /> Intrusion Analysis received on Geotracker. March 1, 2006 <br /> sampling data for MtBE indicates that at least four <br /> monitoring well data points exceed ESL Surfer Final Tier 1. <br /> (MW-1 at 55 ug/I, MW-2 at 7.0 ug/I, MW-5 at 11 ug/I, MW-11 <br /> at 11 ug/1). Cambria utilizes ESL Table E-1 a for ground <br /> water and potential vapor intrusion concerns. Based on this <br /> evaluation, site passes for allowable limits of MtBE and <br /> vapor intrusion concerns. EHD approves no further action <br /> request and processes site for submittal to CVRWQCB. <br /> August 2006 Site NFA concurrence request sent to CVRWQCB. <br />