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Mr. Allan Fetters, Mr. i denOuden - 2 - 17 October 2008 4" <br /> Summary <br /> California Regional Water Quality Control Board, Central Valley Region staff concur <br /> with the Phase II Work Plan on the condition that the following actions are added to the <br /> work plan: <br /> • Obtain an additional soil boring near the eastern concrete ponds, with samples to be <br /> obtained at five feet intervals between the soil surface and the water table with <br /> samples to be analyzed for nitrate and ammonium in the same manner as the other <br /> soil borings. <br /> • Before initiating field work, provide a revised Figure 3 to Regional Water Board staff <br /> for review illustrating where the additional soil boring is proposed to be drilled. This <br /> may be submitted electronically. <br /> • All soil and groundwater samples shall be analyzed for ammonium in addition to <br /> nitrate. <br /> • Notify Regional Water Board staff when a schedule for field work is secured. <br /> Thank you for providing a rather comprehensive work plan that will provide a good <br /> assessment of whether nitrate is migrating to groundwater through the soil column. The <br /> groundwater samples obtained below the first water-bearing zone will help to determine <br /> whether site operations have affected the deeper water-bearing zones. <br /> It is anticipated that the work described in this work plan can be completed by <br /> 15 November 2008, and the site characterization report should be delivered by <br /> 30 December 2008. If you have any questions, you may contact me at (916) <br /> 46 -4680. <br /> AMY ERRELL <br /> Private Sites Cleanup Unit <br /> cc: Mr. Kevin Werner, City of Ripon, Ripon <br /> Ms. Vicki McCartney, San Joaquin County Environmental Health Dept., Stockton <br /> Mr. Bud denOuden, Ripon Farm Service LLC., Stockton <br /> Ms. Stacy Guthmiller, Herum Crabtree Brown, Stockton <br /> Mr. Jeffrey Hawkins, Isola Law Group, Lodi <br /> Mr. John Cooper, Genesis Engineering and Redevelopment, Ripon <br /> Mr. Paul Sheldon, Law Offices of Patrick Riddle, Stockton <br /> Mr. Patrick Hubbard, Treadwell & Rollo, San Francisco <br /> Mr. David Kleesattel, Johnson Wright Inc., Lafayette <br />