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f ENVIRONMENTAL HEALTH DEPARTMENT <br /> PQM'" SAN JOAQU N COUNTY <br /> r Unit Supervisors <br /> V, F -? <br /> Donna K.Henan,R.E.H.s. 304 East Weber A enue, Third Floor Carl Borgman,R.E.H.S. <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, Califo is 95202-2708 <br /> ,r` Douglas W.Wilson,R.E.H.S. <br /> 04 � P Program Manager Telephone: ( 9) 468-3420 Margaret Lagorio,R.E.H.S. <br /> �f�bR Laurie A.Cotulla,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. <br /> JUN 2 4 2005 <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 J Daquin County Environmental Health <br /> Department (EHD). Attending the meeting were you representing Shell Oil,Joe Neely and Aubrey <br /> Cool representing Cambria Environmental Technology, I c., and Margaret Lagorio, Nuel C. <br /> Henderson,Jeff Wong, Harlin Knoll,Michael Infurna,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 ynopsis 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 NIW13 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 include in the next quarterly monitoring report. <br /> The contaminant of concern at this site is 1,2-DCA. If it an 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 />