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Additional Monitoring Well Installation Work Plan - July 2002 <br /> GEWEKE LAND DEVELOPMENT & MARKETING <br /> 16 South Cherokee Lane, Lodi, California <br /> 10. INTRODUCTION <br /> At the request of Mr Dale Gillespie of Geweke Land Development & Marketing (GLDM), _ <br /> Advanced GeoEnvironmental,Inc(AGE)has prepared this work plan for installation of two ground <br /> water monitoring well clusters The location of the site is illustrated on Figure 1 A site plan is <br /> illustrated on Figure 2 <br /> The work plan was prepared to verify the lateral and vertical extent of impacted ground water <br /> downgradient of the site, as directed by the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) by letter dated 13 June 2002 (Appendix A) This work plan is in accordance with <br /> CVRWQCB Cleanup and Abatement(C&A) Order No 93-701 and CVRWQCB guidelines for the <br /> investigation of underground storage tank (UST)'sites <br /> This work plan provides a description of the scope of work and procedures for installation of two <br /> ground water monitoring well clusters (five borings), collection of soil samples and analysis of <br /> ground water samples <br /> 2.0. BACKGROUND <br /> In 1985,two 10,000-gallon,one 6,000-gallon and one 1,000-gallon underground storage tank(UST) <br /> were removed from the site, no soil sampling was performed during tank excavation In October <br /> 1985, San Joaquin County required GLDM to conduct a site investigation of suspected leakage from <br /> the 1,000-gallon waste oil tank ' <br /> Between 1986 and 2001, thirty-two soil borings, seven vapor extraction wells, one ground water <br /> extraction well and fourteen ground water monitoring wells were installed on and near the site <br /> Ground water monitoring was conducted at the site by Kleinfelder in 1985, Browri and Caldwell <br /> from February 1986 to July 1990,PES Environmental Inc and Blaine Tech Services,Inc from May <br /> 1991 to September 1991,Sun Tech Environmental Inc from December 1991 to July 1993,Geologic <br /> Audit Services, Inc (GeoAudit) from September 1993 to September 1994 and AGE from March <br /> 1995 to the present <br /> A Problem Assessment Report(PAR)was prepared by PES Environmental Inc and submitted to the <br /> CVRWQCB in July 1991 A Final Remediation Plan (FRP) was prepared by GeoAudit and <br /> submitted to the CVRWQCB in July 1993 <br /> In December 1993, a low pressure blower was installed and connected to the seven vapor wells and <br /> four monitoring wells to introduce an oxygen source (air) in preparation to innoculate wells with <br /> hydrocarbon-consuming bacteria In August 1994, in-situ bioremediation began at the site by <br /> Advanced GcoEnvironmental,Inc <br />