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Golder Associates inc. <br /> 180 Grand Avenue,Suite 250 ShIl <br /> - /'���� <br /> Oakland,CA USA 946 <br /> I sil _ eS <br /> Telephone(510)239-900 l7 <br /> 00 <br /> fax(510)239-9010 <br /> ' a i <br /> February 18, 1997 Our Ref.: PR3-7592 <br /> San Joaquin County <br /> Public Health Services <br /> Environmental Health Division <br /> 445 N. San Joaquin.Street, <br /> P.O. Box 388 <br /> Stockton,CA 95201-0388 <br /> Attention: Ms. Mary Meays <br /> RE: PERMIT APPLICATION AND WORK PLAN FOR <br /> DECOMMISSIONING ALL EXISTING MONITORING:WELLS AT <br /> UNION ICE FACILITY, 1320 WEST WEBER STREET, STOCKTON,CA <br /> Dear Ms. Meays: <br /> Golder Associates Inc. (Golder)is pleased to submit this,workplan for the decommissioning <br />` of allxi tin <br /> e . s g monitoring wells at 1320 West Weber Street in Stockton, California (Figure 1). <br /> The well decommissioning is being conducted as part of the activities associated with <br /> obtaining final closure of the site. <br /> Background <br /> As part of a remedial investigation for a petroleum hydrocarbon release from former <br /> underground storage tanks at the Union Ice Company's facility,thirteen monitoring wells <br /> were installed over a four year period under the direction of URS Corporation and WHY <br /> Environmental Consultants,Inc. (WHF). <br /> k Monitoring wells MW-1S and MW-1D are located upgradient to the site at 1245 West Weber <br /> Avenue. Monitoring wells MW-2 through MW-12 are located at 1320 West Weber Avenue at <br /> the Union Ice Company's facility (Figure 1). <br /> Well construction details are included on the attached boring logs. All monitoring wells, <br /> with the exception of monitoring well MW-4D were constructed using 4-inch.diameter <br /> Polyvinyl Chloride (PVC) casings. Monitoring well MW413.was constructed using a 4-inch <br /> PVC inner casing to a total depth of 60 feet and a.12-inch'diameter outer steel conductor <br /> casing to a total depth of.38 feet. This well was screened'between 50 and-60 feet. The 12-inch <br /> diameter steel conductor casing was grouted to the surface and'the 4-inch diameter PVC <br /> I casing was sealed inside'the 12-inch casing with a cement/sand grout from 38 feet to ground <br /> surface. <br /> OFFICES IN AUSTRALIA,CANADA,GERMANY,HUNGARY,ITALY,SWEDEN;UNITED KINGDOM,UNITED STATES <br />