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October 26, 2006 <br /> Mr. Jeffrey Wong, Senior REHS <br /> LOP/Site Mitigation Unit IV <br /> Environmental Health Department San Joaquin Court <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, CA 95202-2708 <br /> Re: Continental Grain Co. (ContiGroup) <br /> 9504 South Harlan Road <br /> French Camp, CA 95231 <br /> Soil Boring Installation Work Plan <br /> Dear Mr. Wong: <br /> We are submitting this brief letter Work Plan for the installation of one soil boring at the above <br /> referenced property. This workplan provides details of the soil boring installation activities for your <br /> review prior to procuring the permit. <br /> SITE OVERVIEW <br /> The French Camp Elevator is an active grain storage and transfer facility located approximately <br /> five miles south of Stockton, California in San Joaquin County (See Figure 1). The site <br /> encompasses roughly nine acres and includes improvements such as grain elevators, grain <br /> storage bins, seed storage, storage buildings, truck scales, and an office. <br /> In 2005, an interim action/pilot scale study of methods to enhance the zone of influence during <br /> injection and to accelerate abiotic dehalogenation was implemented at the French Camp site. <br /> The pilot study consisted of two actions: hydraulic fracturing of the intermediate zone and <br /> injection of granular zero-valent iron (GZVI) into the intermediate aquifer. <br /> A groundwater model is being developed for the site in order to investigate the feasibility of <br /> extracting water from the northern portion of the site and re-injecting it in the area that GZVI <br /> was injected. Information regarding the soil properties at the site is needed in order to finalize the <br /> groundwater model and therefore it is proposed to install one soil boring and collect Shelby tubes <br /> from several depth intervals. <br /> SOIL BORING INSTALLATION INFORMATION <br /> A California-licensed drilling company, RSI Drilling, Inc., will advance one nominal 8'/4-inch <br /> diameter borehole to approximately 90 feet below ground surface using a hollow stem auger drill <br /> rig. Advanced GeoEnvironmental, Inc. (AGE), an environmental consulting firm out of Stockton, <br />