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1590 Solano Way <br /> #A <br /> Concord, CA 94520 <br /> October 4 , 2007 TRC Project No. 151793 <br /> Ms. Lori Duncan <br /> San Joaquin County <br /> Environmental Health Department <br /> boo East Main Street <br /> Stockton, California 95202 <br /> RE: Additional Soil and Groundwater Investigation Work Plan <br /> Central California Traction Company(CCT)Stockton Rail Yard <br /> 1645 Cherokee Road <br /> Stockton, California <br /> Dear Ms. Duncan: <br /> On behalf of Central California Traction Company(CCT),TRC submits this Additional <br /> Soil and Groundwater Investigation Work Plan in response to comments made by the <br /> San Joaquin County Environmental Health Department(SJCEHD) in a letter May 14, <br /> 2007 concerning the Remedial Action Report(RAR) submitted by CLS Environmental <br /> Services, Inc. on December 12, 2006. The site is currently a rail yard and maintenance <br /> facility located at 1645 Cherokee Road in Stockton, California (Figures 1 and 2). <br /> 1.0 PROJECT OBJECTIVES AND SCOPE OF WORK <br /> The objectives of this work plan are to: (1) clarify and resubmit data previously presented <br /> in the RAR(originally submitted by CLS Environmental Services (CLS) on December 12, <br /> 2oo6) in a manner which identifies potential data gaps, and; (2) propose the appropriate <br /> field activities to further characterize the extent of hydrocarbons in both soil and <br /> groundwater. <br /> The scope of work for this assessment includes the following: <br /> • Advancement of four(4) exploratory borings to assess the lateral distribution of <br /> hydrocarbons in soil and groundwater. <br /> • Collection of soil and grab groundwater samples from the exploratory borings for <br /> analysis at a state-certified laboratory. <br /> • Preparation of a final technical report documenting soil boring and sampling <br /> activities, groundwater sampling procedures, laboratory results, waste <br /> characterization, and disposal. <br />