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ENVIRONMENTAL HEALTHODEPARTMENT <br /> PQUIN SAN JOAQUIN COUNTY <br /> Unit Superrisors <br /> `.c <br /> t' ? Donna K.Heran,R.E.H.S. Carl Borgman,R.E.H.S. <br /> 304 East Weber Avenue, Third Floor <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> • �:q, ,. ,:`p• Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Corolla,R.E.H.S. Robert McClellon,R.E.H.S. <br /> Program Manager Fax: (2O9) 464-0138 Mark Barcellos,R.E.H.S. <br /> DENIS L BROWN <br /> SHELL OIL PRODUCTS <br /> 20945 S WILMINGTON <br /> CARSON CA 90810-1039 <br /> RE: SHELL Sites in San Joaquin County <br /> A meeting was held on June 9,2005,at the office of San Joaquin County Environmental Health <br /> Department (EHD). Attending the meeting were you representing Shell Oil,Joe Neely and Aubrey <br /> Cool representing Cambria Environmental Technology,Inc.,and Margaret Lagorio,Nuel C. <br /> Henderson,Jeff Wong,Harlin Knoll,Michael Infuma,Lori Duncan,and Vicki McCartney <br /> representing EHD. There was a general discussion about preparing cross sections that have <br /> lithological correlations with interpretations of the subsurface and including them in site conceptual <br /> models (SCM)prepared for each site. The following is a synopsis of the status and/or site specific <br /> discussions at the meeting. <br /> 3011 Benjamin Holt, Stockton <br /> A third geologic cross section is to be prepared that extends from the contaminant source area to <br /> newly installed monitoring well MW13 and is to be included in an updated SCM. In the conclusions <br /> and recommendations of the August 14,2004,SCM,it was stated that MTBE was no longer a fuel- <br /> component at this site, that concentrations of MTBE were declining and expected to continue <br /> declining and that case closure may be warranted. If this is the conclusion and recommendation of <br /> the updated SCM, then a closure report should be prepared as discussed in the Tri-Regional Board <br /> Staff Recommendations dated April 16,2004. <br /> 1313 Charter Way.Stockton <br /> An SCM is to be prepared for this site and can be included in the next quarterly monitoring report. <br /> The contaminant of concern at this site is 1,2-DCA. If it can be demonstrated that the 1,2-DCA <br /> plume has been adequately characterized on-site and off-site and that action to remediate the mass of <br /> contamination is not necessary, then a closure report should be prepared as discussed in the Tri- <br /> Regional Board Staff Recommendations dated April 16,2004. <br /> 620 Charter Way.Stockton <br /> The comments provided in the EHD letter dated May 18,2005,were discussed. It was agreed that <br /> CPT borings would be advanced and the data would be used to decide where monitoring wells <br /> would be installed. <br /> 440 Charter WayStockton <br /> It was stated that the off-site property owner had not responded to the access agreement request. <br /> Cambria will follow up on securing an access agreement and proceed with implementation of the <br /> work plan approved December 13,2004. <br />