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v <br /> r : <br /> REVISED PROPOSED WORK PLAN <br /> SUBSURFACE HYDROCARBON INVESTIGATION <br /> MANTECA BEAN FACILITY <br /> 229 MOFFAT BOULEVARD <br /> MANTECA, CALIFORNIA <br /> June 2, 1989 <br /> 1.0 INTRODUCTION <br /> The proposed work plan presented in the Revi-ed Preliminary <br /> Report (January 11, 1989) by Groundwater Technology, Inc. (GTI) , <br /> on behalf of Golden Grain Company, is here substantially revised <br /> in response to a letter dated March 29, 1989 from Mr. Edward W. <br /> James of the California State Regional Water Quality Control <br /> Board to Mr. Steven Wulff of Golden Grain Company. <br /> 1 <br /> Based on a review of the drill logs and the results of a <br /> hand pump test at the site, it was decided to install single <br /> wells rather than nested or clustered pairs of wells. GTI's <br /> investigation of the site will proceed in three steps: <br /> 1) A soil--vapor survey will be conducted to delineate the <br /> extent of free product beneath the site. <br /> 2) Data from the soil-vapor survey will be used to choose <br /> locations for four to seven soil borings. Three of the <br /> GRouNDWATER <br /> TECuNOLOCY.INC. <br />