SITE INFORMATION AND CORRESPONDENCE

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Landa Turkette, REHS San Joaquin County Public Health Services Environmental Health Division April 5, 1993 Page 3 continue to completion, absent plowing up the area and causing potential spreading of the contaminants due to disturbance of same. In view of the proven stability of the low level contamination zone, the natural remediation taking place, the predictable endpoint of the problem, and the absence of existing or potential damage from the VOCs, and in keeping with our mutual concern for the preservation of the Tracy well's potable water standards, I suggest that we test the boundary wells MW-1 and MW-3 quarterly and the balance of the wells MW-2 and MW-4 annually to further verify the VOCs total isolation to the BC&D site. We have interviewed the previous owner of the property with respect to the alleged tank that was encountered during the 1987 investigations. He indicated that only three (3) tanks existed on site (he installed same) and that we had removed same. As-built drawings of the fueling systems are nonexistent; therefore we are operating on verbal recollection of events which are not quite precise. We will take steps to probe the area to determine if the drilling encountered a tank or other uncharted debris that often occupies building sites. Should a tank be determined to exist, proper procedures will be followed to extract and dispose of same (as was the case with the former three tanks). Pursuant to your request, by copy of this letter to Geological Technics, I am requesting a copy of the soil boring report and laboratory documentation to be forwarded directly to you, which was to be included as a portion of the MW-4 installation report. I am certain that it was an oversight. We appreciate your assistance in this effort and look forward to completion of the work in a prudent, reasonable, cost-effective manner with the least possible disturbance of the environment, community, and the owner's ongoing business operations. cerel Robert J. Buric Agent for Owners cc: BC&D Files Ben Curran Ray Kablanow/Geological Technics, Inc.