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QUARTERLY REPORT <br /> Geweke Land Development & Marketing <br /> 16 South Cherokee Lane <br /> Lodi, California <br /> June 1995 <br /> 1.0. INTRODUCTION AND SCOPE OF WORK <br /> At the request of Geweke Land Development&Marketing(GLDM), and in accordance with Cleanup <br /> and Abatement Order No 93-701, Advanced GeoEnvironmental, Inc (AGE) conducted field <br /> activities at 16 South Cherokee Lane in Lodi, California (Figure 1 - Vicinity Map) A detailed site <br /> plan is depicted in Figure 2 - Site Plan <br /> In accordance with the Revised Monitonng and Reporting Program No 94-701, ground water and <br /> soil vapors are scheduled for monitoring on a periodical basis for microbiological activities The <br /> progress of remediation in soil is monitored on a quarterly basis The scope of work is to evaluate the <br /> field data and summarize the progress of in-situ bioremediation and monitonng activities at the site <br /> during the second quarter of 1995 <br />• <br /> 2.0. PREVIOUS ASSESSMENT AND REMEDIATION ACTIVITIES <br /> Assessment and remediation activities of a subsurface release of hydrocarbons have taken place at <br /> the site since 1987 A total of 14 ground water monitoring wells, one ground water extraction well, <br /> 7 vadose zone wells and numerous soil borings were installed, drilled and sampled In 1993, <br /> Geological Audit Services, Inc (GeoAudit) completed the assessment activities A Problem <br /> Assessment Report (PAR), Final Remedial Plan (FRP) and subsequent addenda, were prepared by <br /> GeoAudit and submitted to the Central Valley Regional Water Quality Control Board in 1993 and <br /> 1994 <br /> The PAR detailed the results of final assessment procedures and evaluated several possible methods <br /> of soil and ground water remediation for the site Based upon site conditions, current site use and <br /> cost, the PAR recommended an in-situ remediation method using hydrocarbon-degrading microbes <br /> The FRP, and subsequent addenda, detailed the proposed remediation method <br /> A pilot study of the in-situ soil bioremediation was performed between 4 February and 31 March <br /> 1994 For the pilot study, five wells were inoculated with hydrocarbon-degrading bacteria The pilot <br /> study lasted for two months During the pilot study, two soil borings were drilled to monitor the <br /> bioremediation progress Analysis of soil samples from the soil borings indicated a significant decrease <br /> of hydrocarbon impacted soil in the immediate vicinity of one of the inoculated wells <br />