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CealogicaI TeChKics <br /> 1 101 7`h Street <br /> Modesto,Califomia 95354 <br /> (209)522-4119 I Fax(209)522-4227 <br /> REPORT <br /> ' Initial Site Conceptual Model <br /> Sinclair Trucking <br /> 3780 West Linne Road <br /> Tracy, California <br /> ' Project No. 1030.2 <br /> June 18, 2003 <br /> 1.0 INTRODUCTION <br /> The site has been undergoing investigation activities since 1995 when three monitoring <br /> wells and one soil boring were installed. Groundwater flow has been to the northeast for <br /> most of the site history. <br /> On June 14, 1995, Geological Technics Inc. (GTI) installed three monitoring wells and <br /> advanced one soil boring in order to evaluate the vertical and lateral extent of gasoline <br /> range petroleum hydrocarbons. <br /> ' On February 16, 1999, GTI personnel supervised the installation of one groundwater <br /> monitoring well downgradient of the former UST to further define the lateral extent of <br /> ' gasoline contamination in the soil and groundwater. This well shows low levels of gasoline <br /> range hydrocarbons. <br /> ' In response to a request by Mr. Ron Rowe of SJC PHS/EHD, GTI prepared a work plan on <br /> January 18, 2000, to define the lateral extent of the soil and groundwater contamination at <br /> the site. On April 20, 2000, Ms. Lori Duncan of SJC PHS/EHD issued a letter denying the <br /> ' approval of the work plan. During phone conversations in May of 2000, Ms Duncan <br /> requested that a work plan be prepared for the installation of a deeper monitoring well near <br />