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Mr. Mark Buller - 2 - 7 November 2014 <br /> Idealease Stockton <br /> consider drilling additional soil borings to define the extent of the contamination in <br /> Area A. <br /> 3. Idealease collected floor samples from the two excavation areas in 2010 and TPHd <br /> concentrations in two samples exceeded the ESLs (EXC.A-F1 and EXC.B-F2). Floor <br /> samples were collected at six and eight feet logs and it is unclear whether the vertical <br /> extent of the soil contamination is defined. Idealease should drill one soil boring near <br /> the elevated floor sample location of each excavation area and collect soil samples at <br /> the previous soil sample depth and deeper to define the vertical extent of contamination <br /> that exceeds direct contact limits for unrestricted use at the Site. <br /> 4. Central Valley Water Board staff may request that a deed covenant be filed for the area <br /> of remaining soil concentrations that that exceeds direct contact limits for unrestricted <br /> use. Idealease may choose to excavate the remaining soil mass and close the Site with <br /> unrestricted use (no deed covenant). <br /> 5. Effective 13 October 2014, Central Valley Water Board will no longer accept paper copy <br /> submittals. Idealease needs to continue to submit electronic documents to GeoTracker <br /> by the deadline. If you need additional assistance with GeoTracker you may call the <br /> help desk at (916) 341-5791 or log on to the State Water Board's GeoTracker website at <br /> http://geotracker.waterboards ca.00v , and click on the Electronic submittal of <br /> information. <br /> In summary, Central Valley Water Board staff concurs with the installation of three soil borings <br /> with a potential for a fourth boring to define the southern extent of soil contamination at the Site. <br /> Idealease should consider drilling additional borings to define the vertical extent of the <br /> contamination in Areas A and B and additional lateral definition of the eastern extent of <br /> contamination at Area A. By 31 December 2014, Idealease needs to drill the soil borings, <br /> collect and analyze the soil samples, and submit a report of findings. <br /> If you have any questions, you may contact me by phone at (916)464-4819 or email me at <br /> kshelton waterboards.ca.aov. <br /> KRISTI SHELTON, P.E. <br /> Water Resources Control Engineer <br /> Aboveground Tanks Cleanup Unit <br /> cc: San Joaquin County Environmental Health Division, Stockton <br /> Mr. Brian Millman, Advanced GeoEnvironmental, Stockton <br />