Laserfiche WebLink
Flag City Chevron <br /> 6421 Capitol Avenue,Lodi -2 - 28 February 2002 <br /> Therefore, following destruction of RDW-1 on 6 March 2002,please complete the following items and submit <br /> an addendum to the FRP Addendum on or before 1 July 2002: <br /> • Collect monthly water level measurements for March,April,May, and June, and prepare monthly <br /> contour maps to show groundwater flow directions and gradients for all five informal water bearing <br /> zones. Using the C-C' cross-section(included as Figure 4 in the FRP Addendum Report), show vertical <br /> groundwater gradients at monitoring wells MW-13,MW-11, and MW-9 for the four months. <br /> • Using the March 2002 groundwater analytical results, estimate the remaining mass of petroleum <br /> hydrocarbon contamination and MtBE in groundwater outside the influence of the on-site groundwater <br /> extraction and treatment system. <br /> • Evaluate in-situ remedial methods to reduce MtBE groundwater contamination including bio sparging <br /> and ozone sparging. Complete a cost analysis of remedial methods evaluated including groundwater <br /> extraction and treatment,and estimate the length of time each method may take to achieve water quality <br /> objectives. <br /> • Provide a plan of work and schedule to implement the best available technology and remediate MtBE <br /> and petroleum hydrocarbon contamination in groundwater. <br /> Please notify me at least five business days prior to any site work or sampling. If you have any questions or <br /> comments,please call me at(916)255-3115. <br /> �Y <br /> � FR.G._b�M Hartz , <br /> Associate Engineering Geologist <br /> cc: Mr.Mark Owens,UST Cleanup Fund, SWRCB, Sacramento <br /> Mr. Mike Infurna, San Joaquin County Environmental Health Division, Stockton <br /> Mr. Timothy J. Cuellar,Advanced GeoEnvironmental, Incorporated, Stockton <br /> Mr. Scott Rishwain,Rishwain&Rishwain, Stockton <br /> Mr. Ben Guzman, San Joaquin County Municipal Utilities, Stockton <br /> Ms. Beverly Benigno,Rocky's Restaurant,Lodi <br />