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IGEOCON <br /> CONSULTANTS,INC. <br /> G E O T E C H N I C A L ■ ENVIRONMENTAL n MATERIALS <br /> Project No. 59200-06-89 <br /> November 17,2009 <br /> Mr. Saiyed Ali <br /> Caltrans District 10 Environmental Planning 06/176 <br /> 1976 Dr.Martin Luther King Jr. Blvd. <br /> Stockton, California 95205 <br /> Subject: DISTRICT 10 MONITORING STATIONS <br /> STATE ROUTE 99, SAN JOAQUIN COUNTY, CALIFORNIA <br /> CONTRACT NO. 06A1141 <br /> TASK ORDER NO. 89,EA NO. 10-OK3201 <br /> PRELIMINARY SITE INVESTIGATION WORKPLAN <br /> Dear Mr. Ali: <br /> In accordance with the California Department of Transportation (Caltrans) Contract No. 06A1141 and <br /> Task Order(TO)No. 89,we submit this Workplan for Preliminary Site Investigation(PSI)activities to <br /> be conducted at three sites along State Route 99 (SR-99) in San Joaquin County, California. This <br /> Workplan describes the scope of services requested by Caltrans and outlines the procedures and <br /> methods we will employ to complete the project. <br /> PROJECT LOCATION AND PROPOSED IMPROVEMENTS <br /> The three project locations are located within state right-of-way along SR-99 near the communities of <br /> Ripon, Stockton and Lodi. The approximate project locations are depicted on the attached Vicinity Map, <br /> Figure 1. PSI activities will be conducted at the following locations: <br /> • Site #5 - SR-99 northbound offramp to Jack Tone Road, approximate Post Mile (PM) 2.3 near <br /> Ripon <br /> • Site#22 - SR-99 northbound offramp to Eight-Mile Road, approximate PM 25.4 near Stockton <br /> • Site#41 - SR-99 northbound onramp to Acampo Road, approximate PM 33.7 near Lodi <br /> Caltrans proposes to install traffic monitoring stations at each of the three project locations. <br /> PURPOSE AND PROJECT SCOPE <br /> Caltrans identified each of the project locations as potentially being impacted by petroleum <br /> hydrocarbons and heavy metals based on adjacent land use activities. It is our understanding that <br /> Caltrans will use the PSI results to inform construction contractors of potentially impacted soil within <br /> the project boundaries for soil management and disposal evaluation, and construction worker health <br /> and safety purposes. <br /> Cj.�rr..r►�.ei ��U <br /> 3160 Gold Valley Drive,Suite 800 0 Rancho Cordova,CA 95742-7515 0 Telephone 916.852.9118 ■ fax 916.852.9132 <br />