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QUARTERLY REPORT Geweke Land De%elopment & Marketing 16 South Cherokee Lane Lodi, California March 1995 1.0. INTRODUCTION AND SCOPE OF `FORK At the request of Geweke Land Development & Marketing (GLDM), and in accordance with Cleanup and Abatement Older No 93-701, Geological Audit Services, Inc (GeoAudrt) conducted field activities at 16 South Cherokee Lane in Lodi, California (Figure 1 - Vicinity Map) A detailed site plan is depicted in Figuie 2 - Site Plan Advanced'GeoEnvlroninnental, Inc (AGE) was subsequently retained to prepare the Quarterly Report on field data collected by GeoAudrt In accordance with the Revised Monitoring and Reporting Program No 94-701, prepared by GeoAudrt, ground water and soil vapors are scheduled to be monitored on a periodical basis for microbiological activities The progress of remediation in soil is monitored on a quarterly basis The scope of%voile is to evaluate the field data collected by GeoAudrt and to summarize the progress of an in-start bioiemediation and monitoring activities at the site during the first quaiter of 1995 2 0. PREVIOUS ASSESSMENT AND REMEDIATION ACTIVITIES Assessment and ieniediation activities of a subsurface release of hydrocarbons ha-'e taken place at the site since 1987 A total of 14 ground water momtoii ng wells, one ground water extiactiorn well and numerous soil borings were installed, drilled and sampled In 1993, GeoAudrt completed the assessment activities A Pioblem Assessment Report (PAR), Final Remedial Plan (FRP) and subsequent addenda, were prepared by GeoAudrt and submitted to the Central Valley Regional Water Quality Control Board in 1993 and 1991 The PAR detailed the results of final assessment procedures and evaluated several possible methods of soil and ground water iemediatron for the site Based upon site conditions, cuiient site use and cost, the PAR reconimended an to-stat remediation method using hydrocarbon-degrading microbes The FRP, and subsequent addenda, detailed the proposed iemediatron method A pilot study of the to-stat soil bioiemediation was per formed between 4 February and 31 March 1994 For the pilot study, five wells were inoculated with hydrocarbon-degrading bacteria The pilot study lasted for two months During the pilot study, two soil borings were drilled to monitor the broieinediatioin progress Analysis of soil samples fiom the soil borings