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May Shell Oil Meeting <br /> Page 2 <br /> 141 North El Dorado Street,Stockton-Mary Meays <br /> Following remedial efforts,soil borings and monitoring confirmed that the site had undergone effective <br /> remediation. During post remedial groundwater monitoring,MTBE and chlorinated solvents were detected in <br /> samples collected. Once Shell and Enviros have reviewed the most recent results along with possible sources of the <br /> chlorinated solvents,a summary table and a request for closure evaluation will be submitted,then PHS/EHD will <br /> will discuss the site with the Central Valley Regional Water Quality Control Board staff and if warranted direct the <br /> preparation of a closure report. <br /> 6131 Pacific Avenue, Stockton-Mary Meays <br /> The additional investigation to define the extent of groundwater contamination was discussed. If Ron Slate grants <br /> access to his property a total of four monitoring wells will be installed by July 3, 1997. Shell Oil will prepare an <br /> access agreement for Ron Slate's review by June 6, 1997. The agreement will limit access to non-business hours so <br /> that Air Touch's business operations will not be affected. Air Touch will also have to approve of the access <br /> agreement. The installation of monitoring wells on the Slate property will be limited to planter areas. Copies of <br /> reports and correspondence regarding the Slate property will be forwarded to Ron Slate and to Air Touch. <br /> 2575 Country Club Boulevard,Stockton-Mary Meays <br /> The domestic wells which were sampled shortly after the unauthorized release was discovered will be resampled <br /> and analyzed for petroleum constituents and MTBE. The Caltrans permit should be issued by early June for the <br /> offsite well proposed southwest of MW8. There was a discussion of the soil analytical results that were obtained <br /> from samples collected at 46.5 feet below grade as evidence of vertical migration. PHS/EHD requested that a <br /> monitoring well be installed to evaluate the quality of water at a greater depth than is currently monitored. There <br /> will be a response to PHS/EHD's request for further vertical delineation of the contamination within the next <br /> quarterly report submitted. <br /> A follow-up meeting was scheduled for September 17, 1997 at 9:30 a.m.at the office of PHS/EHD. Thank you for <br /> the opportunity to meet and discuss the Shell sites in San Joaquin County. Hopefully,these meetings will facilitate <br /> communication and enhance a cooperative relationship. If you have any comments regarding the contents of this <br /> summary,please do not hesitate to contact me at(209)468-0337. <br /> Donna Heran,Director,REHS <br /> Environmental Health Division <br /> Mary Meays,Senior REHS Margar rgorio,REHJ <br /> Site Mitigation Unit Supervisor <br /> cc: Elizabeth Thayer,Central Valley Regional Water Quality Control Board <br /> Diane Lundquist,Enviros <br />