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i <br /> tf <br /> ,TATE OF CALIFORNIA Envrronmontai Protection Agency BETE WILSON Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD r)L" <br /> CENTRAL_ VALLEY REGION <br /> 3443 Routicr Road Suite A i <br /> 4prd"'Lntc CA 95827 3098Nr (916) 255 3000 <br /> 19161 255 3015 <br /> 9 December 1994 <br /> Nlr John Welch <br /> Attorney at I.aw <br /> 1800 West March Lane, Suite 490 <br /> Stockton, CA 95219 <br /> PROPOSED ASSESSMENT OF SOIL AND GROUND WATER CON'T'AMINATION, <br /> INDEPENDENT TRUCKING FACILITY, STOCKTON, SAN JOAQUIN COUNTY <br /> I ha\c reviewed the 7 November 1994 Site Contamination Work Plan for Ground Water 7nve> figution <br /> Sill)mitted by Will J HuntLC & A""ociates on behalf of Mr William Miles and Ms Patricia Nolet, the <br /> 0��ners of the property at 1 145 W t<.liarter Way in Stockton A significant amount of Soil excavation <br /> cork has oLc.tirred .it the site lit conjunction with the closure of four underground petialetutl storage tanks <br /> (IJS 1 s) Confirmation soil sampling showed that contaminated soils are still present in the, subsurface <br /> Further rcmediation needs to be done to eliminate the threat these soils pose to ground water <br /> Your proposal to drill three soil borings and construct one giound water monitoring well is inadequate <br /> At least three ground water monitoring wells are needed in order to begin to define the lateral extent of <br /> ground eater containination an(] the ground water gradient Since the local gradient is generally towards <br /> le cast, at least one of the \Neils should be placed Last (down-radiLnt) of the open excavation I'lie work <br /> pian stated that the property owntrrs at 1045 W Charter Way, immediately to the cast of the Independent <br /> I rLICkIng site, "have requested permission to place one or more monitoring wells on the Independent <br /> I'rtiLking '01C In till at1Cn1j)t to dellnL the contamination piobiein which exists benLath their props rty" It <br /> might be wi"e for you to coordinate your well installation requirements with the neighbor's activities <br /> Further investigation also is needed south of the old leach field excavation where gasoline and other <br /> petroleum constituents are in the soil column down to ground water Grab ground water samples from <br /> that .irca also showed contamination with gasoline and volatile organic compounds <br /> 13y 6 Januaty 1995, please submit an amended work plan to lurtlker iemctiiate the soils assocmt4d with <br /> the fornivr US I's, install at least three, ground water monitoring wc,lls at appropriate location', and <br /> ronduLt further investigation near the old ]CAL11 field All work phins should include schedule" with <br /> particular calendar dates Please also submit a copy of the wog k plan to M" Diane Hinson of the San <br /> Joaquin County Public Health Services <br /> If you have any questions or comments, feel free to Lall rile at 1916) 255-3077 <br /> JOEIL M WEISS <br /> l.nglneering Geologist <br /> iJMW Jmw/Isb <br /> cL San Joaquin County Public Health Services, Stockton <br /> Mr Larry Bradfish, Gray, Cary, Ware & Freidenrich, Palo Alto <br />