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V <br /> page 2, 1645 Cherokee Lane <br /> debris. The location of this well was under the tracks that led into the bam (the tracks had <br /> been removed as the excavation proceeded towards the east). This drinking water well <br /> was destroyed under SJC/EHD permit and inspection on July 15, 2005. A grab <br /> groundwater sample was collected for analysis from it before it was destroyed. It is <br /> believed that the original purpose of this well was to supply water to steam engines. <br /> In summary, it is obvious that the excavation activities have exceeded the scope of work <br /> outlined in the work plan, and that areas of contamination that have been discovered are <br /> not all related to the UST issue. SJC/EHD has had discussions about this in the field with <br /> your consultant. In addition to encountering hotspots of petroleum contamination, your <br /> consultant has noted that odors and analytical results indicate they are finding substances <br /> not generally related to diesel UST's. Pockets of buried debris have been encountered, <br /> some at 40 feet bsg. Care and concern should be exercised in segregating the <br /> contaminated soils related to the diesel UST from contamination caused by other activities <br /> at the site. The current excavation area incudes a former engine repair pit and engine <br /> wash down area, in addition to the area where the drinking water well was discovered. <br /> SJC/EHD has, by contract with the State Water Resources Control Board, authority over <br /> subsurface contamination resulting from underground storage tank systems. As <br /> previously approved, groundwater monitoring wells still need to be installed as part of the <br /> UST investigation at this site. Authority over the other issues discovered at this site <br /> resides with the California Regional Water Quality Control Board, Central Valley Region <br /> (CVRWQCB), specifically with the SLIC (spills, leaks, investigations and cleanup) unit. <br /> Please contact Duncan Austin with the CVRWQC13 at (916)464-4712 to request oversight <br /> of the corrective action performed with respect to the non-UST contamination. <br /> Donna Heran, RENS, Director <br /> Environmental Health Department <br /> Lori Duncan, Senior REHS Margaret Lagorio, Supervising REHS <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> cc: James Barton, CVRWQCB <br /> Duncan Austin, CVRWQCB <br /> Bob Trommer, SWRCB-Cleanup Fund <br /> Dave Solis, BES <br />