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Cone Penetrometer Testing (CPT) Report - February 2001 <br /> K& S GAS & GROCERY <br />' 701 East Charter Way, Stockton, California <br /> I1.0. INTRODUCTION AND SCOPE OF WORK <br /> At the request of Mr Kaldoon Othman of K&S Gas&Grocery,Advanced GeoEnvironmental,Inc <br />' (AGE),has prepared the enclosed report for 701 East Charter Way, Stockton, California The report <br /> documents procedures and results for subsurface investigation conducted at the site during 14 and <br /> 15 February 2001, as described in the AGE-prepared Revised Work Plan Addendum - October 2000 <br />' and approved by the San Joaquin County Public Health Services - Environmental Health Division <br /> (PHS-EHD) by letter dated 08 November 2000 The site setting is illustrated on Figure 1 Site <br /> structures and monitoring well locations are depicted on Figure 2 <br />' The objective of the cone penetrometer testing CPT investigation was to characterize and assess <br /> J p g ( } g <br />' <br /> concentrations of dissolved petroleum hydrocarbons and volatile halocarbons in ground water and <br /> to characterize stratigraphy at the site This report is prepared in accordance with guidelines <br /> established by the Regional Water Quality Control Board - Central Valley Region (RWQCB) for <br />' investigation of underground storage tank(UST) sites Background information and site history is <br /> summarized in the AGE-prepared Monitoring Well Installation Report dated 02 June 1999 <br /> 2.0. CPT SOIL BORINGS <br />' On 14 and 15 February 2001, three paired CPT soil borings (CPT-01, CPT-02 and CPT-03) were <br /> advanced at the K & S site utilizing CPT technology to characterize the geological and hydro- <br /> geological framework and to assess potential petroleum-migration pathways beneath the site <br />' Additionally,"grab"ground water and soil samples were collected from selected depths at each CPT <br /> soil-bonng location Boring logs are presented in Appendix A, a site plan depicting boring locations <br /> is presented in Figure 2 <br /> 1 <br /> 21 CPT LITHOLOGIC SOUNDINGS <br />' Three CPT soil bonag s were advanced vertically utilizing a 25-ton truck-mounted CPT drill rig <br /> equipped with 1 50-inch diameter hollow-stem rods(See Figure 2) CPTs-01 and-02 were advanced <br />' to 100 feet below surface grade (bsg), CPT-03 was advanced to 120 feet bsg <br />' Each CPT soil boring utilized a hydraulic ram to advance a cone penetrometer tip to the total depth <br /> of each soil boring Soil parameters such as cone penetrometer tip resistance,sleeve friction, friction <br /> ratio (ratio between sleeve friction and tip resistance) and pore water pressure were continuously <br />' measured as the cone penetrometer was advanced to depth A continuous boring log was generated <br /> utilizing the Gregg In-Situ System CPT computer program The Gregg In-Situ System computer <br /> Advanced GeoEnvironmental,Inc <br /> 1 <br />