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SEP 27 '00 14:06 FR HOLLY SUGRR CORP 2098363764 TO 19168539297 P.02i02 <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> Steven T.Butler,Chair <br /> Winston H. Hickox Grav Davis <br /> Secretary for Sacramento Main Office Go-verno), <br /> F.nvirontntental internal Address: http://www.sw-cb.ca.gov/—rwgcb5 <br /> Protection 3443 Routier Road,suite A.Sacramento,('alifoiaia 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 26 September 2000 <br /> Ms. Anne Ogrey <br /> Spreckels Sugar Co_ Inc- <br /> P-0. Box 60 <br /> Tracy, CA 95378 <br /> REVIEW OF REVISED TECHNICAL REPORTAND WORKPLAN,SPRECKELS UGAR <br /> COMPANY TRACY FACILITY, (CASE# 171) <br /> We have reviewed the Revised Technical Report and Work Plan submitted on your behalf by West Yost <br /> and Associates on 15 September 2000. We have the following comments: <br /> The Work Plan proposes to install two up-gradient wells to establish background groundwater quality. <br /> The well design calls for a 4-inch diameter, schedule 40, PVC cased well installed to a depth of <br /> approximately 30 feet. The well is to be constructed with 10 feet of well screen. Backgroun,! <br /> monitoring wells should be designed to sample the uppermost groundwater_ The work plan,hould be <br /> changed so that the well screen is installed across the water table rather than the current plan )f installing <br /> the top of the well screen at a depth of 20 feet. A sufficient length of well screen should be a)ove the <br /> water table to allow for changes in water level, so the uppermost water is always monitored_ <br /> Board staff concurs with the proposed well locations and with the other aspects of well desi,- i. Please <br /> submit a Ietter confirming you intention to implement the change in design depth noted abov� and staff <br /> can concur with the work plan. <br /> WDR No. 5-00-060 requires that the installation and development of background and detecti:)n <br /> monitoring systems must be complete by the end of September 2000. <br /> If you have any questions please call me at (916) 255-3814. <br /> Ross D. Atkinson <br /> Associate Engineering Geologist <br /> Cc: Mr. Norman Bates Spreckels Sugar Company, Inc.Tracy <br /> Mr. Robert Beggs, West Yost and Associates,Davis <br /> California Environmental Protection Agency <br />