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California Regional Water Quality Control. Board <br /> Central Valley Region a <br /> Winston H.Hickox Gray Davis <br /> Secretaryfor Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca-gov/—Twgcb5 <br /> Protection 3443 ROutier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 8 January 2001 <br /> Mr. Benjamin Hall <br /> i Musco Olive Products <br /> ti 17950 Via Nicolo <br /> Tracy, CA 95376 <br /> CONDITIONAL APPROVAL, HYDR OGEOL OGIC INVES TIGA TION WORKPLAN, MUSCO <br /> OLIVE PRODUCTS, SAN JOA QUIN COUNTY <br /> f I have reviewed the 29 December 2000 Hydrogeologic Investigation Workplan, prepared by Kleinfelder. <br /> The report was submitted in response to Requirement C.2 of Cleanup and Abatement Order No. 5-00- <br /> 717. After reviewing the workplan, I have the following comments: <br /> • Section 4.1, Soil Analysis, states, "A minimum of two (2) soil samples from both deep borings in <br /> the pond areas will be analyzed." The Order requires a minimum of two soil samples from each <br /> deep boring. Please clarify the number of samples prior to implementing the investigation. <br /> • It is noted that the deep borings will be drilled with 10-inch hollow stem augers. That is <br /> acceptable, however, easier drilling would be experienced using 8-inch diameter hollow stem <br /> augers. <br /> • Because of the depth of drilling and the likelihood that a significant portion of the borehole will <br /> be unsaturated, Musco shall grout the borings using a cement based grout material as described <br /> in Section 19.1) of California Well Standards Bulletin 74-90, and Section 13.17 of San Joaquin <br /> County Environmental Health Department's Well Standards. Bentonite chips or slurry is not <br /> F acceptable as a grout material. <br /> The workplan is approved on the condition that the above comments are addressed in an addendum <br /> letter. By 19 January 2001, Musco shall submit an addendum to the workplan. If you have any <br /> questions on this conditional approval,please telephone me at (916) 255-3116. <br /> TIMOTHY R. O'BRIEN <br /> Waste Discharge to Land Unit <br /> San Joaquin River Watershed - <br /> cc: Mike Huggins, San Joaquin County Environmental Health Department, Stockton <br /> Laura Racca, Kleinfelder, Stockton <br /> Richard Stratton, HDR, Folsom <br /> California Environmental Protection A en <br />' C:VmI.•t AI4.i51,e1Mi.e.lH.Ig10a1..DpC <br /> ?a Recycled Paper <br />