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Unocal Corporation <br /> Diversified Businesses <br /> 2000 Crow Canyon Place,Suite 400 <br /> All San Ramon,California 94583 \ <br /> Telephone(510)867-0760 <br /> Facsimile(510)277-2309 <br /> UNOCAL 76 <br /> November 11, 1996 <br /> Wast Region Mr. Michael Infurna <br /> Environmental Remediation Services <br /> San Joaquin County <br /> Public Health Services <br /> 304 E. Weber Avenue, 3rd Floor <br /> Stockton, California 95201-0388 <br /> SUBJECT: Site Code 2162 <br /> FORMER UNOCAL SS 45098 <br /> 5606 Pacific Avenue <br /> Stockton, California <br /> Dear Mr. Infurna: <br /> I have reviewed your letter of September 30, 1996 and offer these comments: <br /> UNOCAL continues to believe that the vadose zone at the subject location has been <br /> adequately characterized and remediated. Additional investigation to identify an <br /> alleged continued source is unwarranted and does not acknowledge prior investigative <br /> results. It is our opinion that residual hydrocarbon concentrations at this site are <br /> associated with the capillary fringe and groundwater regime which were impacted <br /> prior to facility closure and remedial activities. <br /> It is important that this issue be resolved prior to conducting any additional site <br /> characterization. In an effort to move forward with this investigation, I would like to <br /> offer to meet with you to discuss this case and establish a mutually satisfactory strategy <br /> that will satisfy both our concerns. If you feel that that would be beneficial, please <br /> contact me at 510-277-2321. I am very interested in hearing from you. <br /> Sincerely, <br /> Tina Berry <br /> Senior Geologist <br /> Project Manager <br />