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CH2M HILL <br /> 155 Grand Avenue <br /> Suite 1000 <br /> ' <br /> Oakland,CA <br /> CH2MHILL 84612 <br /> low P.O. Box 12681 <br /> Oakland,CA <br /> December 5,2000 94604-2681 <br /> Tel 510.261.2426 <br /> Fax 510.883.8205 <br /> Margaret Lagorio <br /> San Joaquin County Public Health Services <br /> LOP/Site Mitigation Unit <br /> Environmental Health Division <br /> 304 E.Weber Ave.,Third Floor <br /> Stockton,CA 95202 <br /> Subject: Work Plan for Additional CPT Investigation,Monitoring well and Extraction Well <br /> Installation at the Disco Property,Stockton,California <br /> Dear Ms. Lagorio: <br /> Enclosed is the work plan for additional site characterization at the Del Monte Disco <br /> property,located at Myrtle and Filbert Streets,in Stockton California..CH2M HILL is <br /> submitting this work plan on behalf of Del Monte. Del Monte has reviewed and approved of <br /> this work plan.This work plan has been developed to further characterize and define the <br /> ( extent of 1,2-DCA in groundwater beneath,cross-gradient,and downgradient of the Disco <br /> property. This.work plan also specifies the installation of several groundwater monitoring <br /> wells and a groundwater extraction well. The monitoring wells will provide long-term <br /> monitoring points downgradient and cross-gradient of the site. A deep monitoring well <br /> will provide a monitoring point beneath the hydrocarbon/1,2-DCA plume..The extraction <br /> well is being installed to attempt to hydraulically control the source area of the <br /> hydrocarbon/1,2-DCA plume. <br /> A copy if this work plan is being submitted concurrently to the State Water Resources <br /> Control Board Underground Storage Tank Cleanup Fund (UST Fund)for pre-approval.A <br /> copy is also submitted to the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB). Activities outlined in this work plan will be implemented upon approval <br /> from SJC PHS/EHD and the UST Fund. <br /> If you have any questions or comments,please feel free to call me at 510-251-2888 ext. 2101. <br /> Sincerely, <br /> CH2M H LL <br /> Keith Sheets,RG,CHG <br /> Project Manager <br />