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STATE OF CAUFORNIA j1-� �1-; 4 :,=,GtOAGE DEUKMEJIAN.Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— NUV 2 LO <br /> CENTRAL VALLEY REGION FNV I A LFH: <br /> 3443 ROUTIER ROAD <br /> SACRAMENTO,CA 95827-3098 <br /> Mr. Alan R. Bashor 15 November 1989 <br /> 6750 LBJ Freeway--75240 <br /> P.O. Box 809046 <br /> Dallas, TX 75380-9046 <br /> LODI OVERHEAD DOOR CORPORATION, HYDROGEOLOGICAL ASSESSMENT REPORT, CLOSURE OF <br /> SURFACE IMPOUNDMENT <br /> The enclosed memorandum discusses the few remaining items of data <br /> interpretation you must address before your Hydrogeological Assessment Report <br /> is complete. As noted in the memorandum, it appears that the field work <br /> completed to date may be sufficient. The interpretation, other than the <br /> results of recent soil sampling and analysis, shn,tld be Submitted with. the <br /> year end interpretation of monitoring data by 1 February 1990. <br /> We agree in concept with clean closure of this surface impoundment. <br /> Background levels of nickel and zinc have been established in the past, and <br /> should be used to guide the cleanup. It remains to be seen whether removal of <br /> all soils with levels of nickel and zinc greater than background is feasible. <br /> We are looking forward to receiving the results of your current investigation <br /> into the extent of the soil contamination around the surface impoundment by 8 <br /> December 1989 as you indicated in your letter of 19 October 1989. <br /> A revised closure plan based on this investigation should be submitted to the <br /> Regional Board and the Department of Health Services (DHS) . In your letter <br /> you indicated that a "schedule for revising the closure plan" will be <br /> submitted by 8 January 1990. The closure plan should be completed in a time <br /> frame which allows for review by the Board and DHS, public notice and a public <br /> hearing by DHS, and implementation at the onset of the dry season (May 1) . <br /> I will not be working for the Regional Board after 17 November 1989. My <br /> supervisor, Greg Vaughn, will continue to coordinate Board involvement with <br /> this site. If you have any questions regarding this letter or the enclosed <br /> memorandum, please call Greg Vaughn at (916) 361-5743. <br /> ROBERT L. NIBLACK <br /> Associate Engineering Geologist <br /> RLN <br /> enclosure <br /> cc+enc: Ms. Linda Hogg, Toxic Substances Control Division, Sacramento <br /> Mr. Ron Valinoti , San Joaquin County Environmental Health, <br /> Stockton <br /> Mr. John Schweizer, Remediation Services, <br /> Mr. C. Curtis Carter, Overhead/Lodi Door Company, Lodi <br />