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1%W INTERNA`i'16NAL TECHNOLOGY CORPORATION <br /> Mr. Mike Infurna <br /> October 3, 1991 <br /> Page 2 <br /> Disposal <br /> As discussed in Section 5.4 of the Soil Remediation Proposal, it is anticipated that the <br /> excavated soils will be classified as non hazardous, and removed from the site by Eight Ball <br /> Trucking to the Remco Incineration Facility in Port Costa, CA. <br /> To comply with self certification procedures, four composite soil samples per soil stockpile <br /> will be collected and analyzed by the Title 22, LC50 fish toxicity test (96 hr) and for metals <br /> by EPA method 6010 (full scan). The resultant analytical data will be submitted to the San <br /> Joaquin County Health Department's Site Mitigation Unit for review and approval, prior to <br /> disposal of the stockpiles. <br /> Soil Borings <br /> As discussed in Section 5.5.2 of the Soil Remediation Proposal, an investigative soil boring <br /> phase will be initiated if contamination is still present in the tank pit following the completion <br /> of over excavation efforts. The purpose of the borings will be to define the lateral and <br /> vertical extent of hydrocarbon migration. In the event that this phase is deemed necessary, <br /> the scheduling and methodology will be addressed under separate cover. A permit application <br /> and the appropriate fees will be submitted at that time. <br /> I hope this addendum has sufficiently addressed your concerns. If you have any further <br /> questions or comments, please contact me at (510) 372-9100. <br /> I appreciate you assistance in this matter and look forward to working together on this <br /> project. <br /> Sincerely, <br /> Sydney ::sy <br /> IT Corporation <br /> Project Manager <br /> SM:mr <br /> MZ:UST:0021 MER <br />