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Pestana -- Q-Tip Trust page 2 <br /> 2360 East St, Tracy. <br /> Work plan comment <br /> COMMENTS AND CONDITIONS (continued): <br /> • Additional vertical/lateral soil and ground water investigation is <br /> needed in the former waste oil UST area. SJCEHD will require <br /> additional borings to be installed and soil and ground water samples <br /> to be collected and analyzed from this area so that delineation <br /> conclusions can be supported. <br /> • An additional soil boring should be placed between each of the <br /> proposed borings and the area to the north of MW-1 and MW-2,just <br /> short of the "commingled pipeline area"described in the work plan. <br /> The migration/dispersion of the historical high levels of petroleum in <br /> the ground water from MW-1 and MW-2 needed further <br /> understanding. By placing an additional boring north of each of <br /> these wells, the undefined soil contamination noted during well <br /> installation and the ground water down gradient of each well can be <br /> evaluated. <br /> • Please provide an adequate number of cross-sections in the Site <br /> Conceptual Model/Report so that the soil lithology and iso- <br /> concentration lines for each chemical detected is mapped. In order <br /> for SJCEHD to evaluate site-specific conditions and the need for <br /> remediation, all of the conclusions (attenuation, migration, mass- <br /> balance, etc) in the report should be supported by lithological and <br /> laboratory data. <br /> • The permit application already submitted will be processed as soon <br /> as SJCEHD receives confirmation from your consultant that the <br /> above noted concerns will be included in this field mobilization. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN fH&S Section <br /> 25296.1 0(c)(3)1: <br /> • none. <br /> DATED: May 24, 2005 BY <br /> Michael Infurna, S. (2 9) 468-3454 <br /> c: CVRWQCB — James L. Barton, Sacramento. <br /> c: SWRCB — CUF -- Mark Owens, Sacramento. <br /> c: Ground Zero Analysis --- John Lane, 1714 Main St, Escalon CA. 95320 <br /> jXj faxed to consultant on:_ 5-zclr e��.' <br /> Attachment A to addressee and Ground Zero only.- <br />