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. Additional Site Assessment Work Plan - April 2000 <br /> FLAG CITY CHEVRON <br /> 6421 Capitol Avenue, Lodi, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr Richard Bokides of Flag City Chevron, Advanced GeoEnvironmental, Inc <br /> (AGE)has prepared this Additional Site Assessment Work Plan for the advancement and sampling <br /> of 11 soil borings at 6421 Capitol Avenue, Lodi, California (site) The location of the site is <br /> illustrated on Figure 1 A plan of the site is illustrated on Figure 2 <br /> On 01 March 2000, the California Regional Water Quality Control Board - Central Valley Region <br /> (CRWQCB-CVR)directed by Cleanup and Abatement Order No 5-00-700 that the horizontal and <br /> vertical extent of methyl tertiarybutyl ether(MTBE)-impact be defined both on and off the site(page <br /> 4, section 6C) This work plan addendum has been prepared in accordance with California <br /> CRWQCB-CVR guidelines for the investigation of underground storage tanks (UST) sites <br /> To date, only on soil sample analyzed has detectable concentrations of MTBE (P1-35) Suspected <br /> potential MTBE sources include the existing USTs, dispensers and storm drain line <br /> This work plan provides a description of the scope of work and procedures for advancement and <br /> sampling of 12 soil probe borings and 6 hand auger borings A description of current site conditions, <br /> a summary of underground storage tank (UST) removal and a summary of previous subsurface <br /> investigations was included in the Work Plan Addendum -March 2000 <br /> 2.0. SCOPE OF WORK <br /> The source area and extent of MTBE release has not been delineated at the site Analytical results <br /> of soil samples, ground water samples, storm drain grab samples and soil vapor samples indicate <br /> additional assessment of several areas is required Borings will be advanced near the storm drainage <br /> system, near the USTs, east of the dispenser islands <br /> AGE proposes to collect soil samples and in-situ grab ground water samples to evaluate the lateral <br /> and vertical extent of hydrocarbon impacted soil and ground water The additional assessment <br /> activities will consist of the following tasks <br /> • Permitting and pre-field work activities, <br /> • Soil sample collection and analysis, <br /> • Ground water sample collection and analysis, and <br /> • Report preparation <br /> i <br /> Advanced GeoEnr ironmental,Inc <br />