SITE INFORMATION AND CORRESPONDENCE

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I RE: Les Calkins Trucking December 29, 1992 Page 2 In August 1992, the report of information from the soil borings was reviewed by PHS/EHD staff. It was noted that the analytical detection limits used were too high and could not be accepted as evidence that contamination was not present. A meeting with you and your consultant was held in our office to discuss alternatives. After the meeting, it was decided two additional soil borings would be drilled and the soil samples would be analyzed using the detection limits in the "Tri--Regional Board Staff Recommendations" and the "LUFT Manual" Table 3--5. After reviewing the report from the two additional soil borings PHS/EHD staff agrees that 'groundwater has not been impacted. However, PHS/EHD does not agree with your consultant's proposal that soil contaminated with 1000 parts per million of the total petroleum hydrocarbons, as diesel, be left in place. 6 i At the November 9, 1992, meeting, you. expressed concern that the wrong test method had been used. It was clarified that the test method described as "CA LUFT" is the same as the method 8015 which you requested. However, if you wish to perform additional sampling and testing that you have that option. You also expressed concern about the high cost of the investigation, citing the $70,000 spent to date. PHS/EHD urges you to make application to the "Underground Storage Tank Cleanup Fund" for reimbursement of investigation and cleanup costs. An application package is enclosed for your use. As was also discussed at the meeting, it, is essential that criteria, such as the LUFT "leaching ;`potential analysis" which is used to evaluate the amount of contamination which can remain in the soil without posing a threat to groundwater quality, be followed in order for PHS%EHD to provide you with site closure certification. You may choose to limit further site work to that which your consultant hash proposed. However, your site will remain 'on the local "Contaminated Site List" and the "State Leaking Underground Storage Tank Site List." It is possible this would cause :some difficulty with property transfers in the future.' In addition, the contamination may migrate downward, as previously noted, resulting in higher cleanup costs in the future. If you have any questions or wish to discuss this site further contact Margaret Lagorio, Senior�REHS, at (209) 468-3449: { Jog! Khanna, B. , M.P.H. Health Off' er L rie A. Cotulla, REHS, Program Manager nvironmental Health Division Enc: cc: George Barber, Supervisor San Joaquin County cc: Ed Simas,: Supervisor San Joaquin County CC., T & T Earth Services cc: ElizabethlThayer, CVRWQCB cc: Randal Yim, Parker Milliken, 915 L Street, Suite 1180 Sacramento, CA 95814 II 1