SITE INFORMATION AND CORRESPONDENCE

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S./ Chevron U.S.A. Products Company 2409 E. Main Street, Stockton CA. Page 3 A workplan regarding assessment for the above referenced site submitted by Pacific Environmental Group Inc. (PEG) was reviewed by San Joaquin County Public Health Services Environmental Health Division (PHS/EHD). PHS/EHD provided comments regarding substantial deficiencies noted in that plan after many conversations with consultants and responsible parties at this site and subsequently faxed those comments to Chevron on April 18, 1996. Of highest priority was the subject of closing Chevrons abandoned underground waste oil storage tank and any other potential sources. After several telephone conversations with the property owner and Chevron representatives including PEG staff, Brett Hunter of Chevron was verbally notified again on August 5, 1996 that tank and related appurtenances closure was the primary and highest priority item on the agenda for this site. On August 5, 1996 Chevron representative Brett Hunter was notified of pending enforcement actions with regard to the above referenced site for failure to comply with a multitude of potential violations. Following this conversation the RP (Sherman Hinaman) was also notified of this potential enforcement action. On August 7, 1996 Brett Hunter spoke with the supervisor of the PHS/EHD Site Mitigation Unit providing a verbal commitment to remove the tank, other potential sources and also requested written comments on the deficiencies of the workplan submitted previously. The following comments are consistent with those directives and suggestions found on the faxed version dated April 18, 1996. A Ground Penetrating Radar (GPR) assessment of the site should be conducted at the site prior to workplan approval in order to determine the presence of potential sources left by Chevron as a result of incomplete demolition and closure as suggested by reviewing the demolition/abandonment report generated by Chevron engineers in 1976 and the findings of the MARK Environmental Assessment report. The results of this work shall submitted and be incorporated in the workplan amendment. Immediately obtain/submit all necessary permits and applications required for the removal of all known or suspected tanks, piping and potential sources or debris which may preclude the full assessment and characterization at this site. Submit a Health and Safety Plan (HSP) and contact this office for appointments to witness all site work related to this assessment 48 hours in advance by contacting Ronald Rowe, Sr. REHS, at (209) 468-0342. All site work to be witnessed by the contact at PHS/EHD listed above: In the event that wells are justified and placed at this site they shall be designed so as to provide full vertical and lateral definition.