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M. Scott Mansholt - 2 - 14 February 2007 <br /> TAOC Tracy Gravel Pits Workpl, <br /> Geomatrix proposes to implement the workplan by late spring - early summer to allow ground <br /> conditions to dry sufficiently for heavy equipment access to the site and to provide adequate <br /> time for stormwater accumulated in the adjacent retention basin to evaporate/percolate. <br /> Regional Water Board staff concurs with the 30 January 2007 workplan for soil and <br /> groundwater investigation proposed by Geomatrix. <br /> Please notify Regional Water Board staff once ground conditions are suitable to allow <br /> implementation of the workplan. <br /> If you have any questions or comments, please contact Dean Hubbard at (559) 445-5179. <br /> SHELTON R. GRAY C. DEAN HUBBARD <br /> Senior Engineering Geologist Engineering Geologist <br /> P.G. No. 6357 <br /> cc: Michael J. Infurna, San Joaquin County EHD, Stockton <br /> James Levy, UPRR, Roseville <br /> Luis Mercado, SAIC, Sacramento <br /> Caryl Weekley, SAIC, San Ramon <br />