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Leola c�aC re�liics <br /> 1101 7`h Street � <br /> Modesto,California 95354 <br /> (209)522-4119/Fax(209)522-4227 3 Z�Q3 <br /> •�NV1R��MSERUCES� <br /> January 21, 2003 ��RMITI <br /> Project No.: 989.2 <br /> Project Name: Valley Wholesale Drug Company <br /> Mr. Paul Souva <br /> Valley Wholesale Drug Co., Inc. <br /> 1401 W. Fremont St. <br /> Stockton, CA <br /> RE: Work Plan: Geophysical Analysis <br /> Location: Valley Wholesale Drug Co., Inc. <br /> 1401 W. Fremont St., Stockton, CA <br /> I <br /> Dear Mr. Souva: <br /> Upon review of the site geologic condition, soil sample test results and groundwater sample test <br /> results from the groundwater monitoring, we believe it is valuable to perform some basic <br /> geophysical testing on selected soil cores collected from our last drilling: This Work Plan <br /> outlines the work proposed to obtain geophysical data. This information will 'be used in <br /> preparing a site closure report. Geological Technics Inc. believes this sitewill be a candidate <br /> for closure by early summer. <br /> The purpose of gathering geophysical analysis is to incorporate quantitative soil characteristics <br /> data on two sandy layer and the thick clay unit at this site and to evaluate th'e potential for these <br /> sedimentary units to either transport or to be a barrier to migration' of the petroleum <br /> hydrocarbon contaminant. This information will be used to expedite site characterization in <br /> anticipation of site closure. <br /> a <br /> The soil sample testing work will include: <br /> • Select one soil sample from three lithologically distinct layers encountered during drilling <br /> the borehole for the monitoring well installation. These soil cores have been stored at <br /> N: Geological Technics under secure environment, capped, sealed, and labeled.'-' <br /> N (Refer to the attached log of MW-101) <br /> Depth ftDescription <br /> o 20.5-21 gravely, silty sand <br /> �n} o 25.5-26 clayey sand <br /> �t o 40.5-41 gravely, silty, dense clay <br /> • These three soil samples will be sent to Cooper Testing Labs for the following analyses: <br /> o Dry Bulk Density <br /> o Porosity <br /> o Permeability <br /> o Total Organic Carbon <br /> o Hydraulic Conductivity <br /> • Prepare and submit a Risk Evaluation and Appendix B Site Closure Checklist Report as..a <br /> formal request for site closure. <br />