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Exxon #73708 page 2 <br /> 2705 Country Club Blvd., Stockton. <br /> Previous recommendations for this site included the placement of"MW 9'to the <br /> north of the site in the apartment parking lot area. Prior to any remedial action <br /> approval by PHS-EHD and in the presence of continued detectable Benzene in <br /> MW-3, this down-gradient monitoring well will need to be installed. <br /> PHS-EHD recommends that this site continue to monitor and sample all wells <br /> with groundwater in them (including vapor wells) on a quarterly schedule. If <br /> contaminants continue to be detected, the site should proceed to evaluate <br /> remedial options. In addition, steps should be taken to install the down-gradient <br /> monitoring well and collect soil data from 20 feet below the surface in all areas <br /> where only shallow data exists. A work pian that addressees these concerns <br /> should be submitted to PHS-EHD for review and approval. <br /> Closure requests (No Further Action determination) can only be considered after <br /> the site has been fully assessed and mitigation activities are completed. . <br /> If continued quarterly monitoring verifies that no contaminants are present in any <br /> well, a Closure request(as outlined in The Tri-Regional, Appendix B) should be <br /> submitted to PHS-EHD for review and approval. All items listed on page two of <br /> the appendix should be addressed and areas where data currently does not exist <br /> should have steps taken to collect it prior to closure request submittal. <br /> Please contact Michael Infuma at (209) 468-3454 should you have any <br /> questions or wish to discuss the site. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> C Gl(4a <br /> Michael J. Infuma Jr., Senior REHS Margaret Lagor o, REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> MI/ <br /> c: Delta Environmental- Keoni Almeida <br /> c: CVRWQCB - Pat Anderson <br />