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4 <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Unit Supervisors <br /> A Donna K. Heron, R.E.H,S, <br /> " Director 304 East Weber Avenue, Third Floor Carl Borgman, R E.H.S. <br /> At Olsen, R.E.H.S. Stockton, California 95202-2708 Mike Huggins, R.E.H.S., R.D.I. <br /> Douglas W. Wilson, R.E.H.S. <br /> a P ie A, C'n Manager R.E.H.S. <br /> Telephone: 209 468-3420 <br /> 9 � / FOR Laurie A. Cotulla, R.E.H.S. P � ) Margaret Lagorio, R.E.H.S. <br /> Fax: (209) 464-0138 Robert McClellon, R.E.H.S, <br /> Program Manager Mark Bareellos, R.E.H.S. <br /> DENIS L BROWN <br /> JIJ14 2 4 2005 <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 Inf rma, 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 Way, Stockton <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 />