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20 April 1995 <br /> AGE-NC-95-0109 <br /> Page 2 of 8 <br /> indicated a significant decrease of hydrocarbon impacted soil in the immediate vicinity of <br /> one of the inoculated wells <br /> To further demonstrate the effectiveness of bioremediation, microbial inoculum was added <br /> to drums that contained soil cuttings and purge water from subsurface investigation activities <br /> over the past few years Subsequent sampling and analysis of soil and water samples <br /> indicated a significant degradation of hydrocarbons <br /> Based upon the results of the pilot study and the drum treatment, a full-scale soil <br /> inoculation was initiated by GeoAudit in August 1994 Approximately 1,200 gallons of <br /> inoculum were introduced into wells on-site A total of nine monitoring wells, one <br /> extraction well and six remediation wells were inoculated Details of the inoculation <br /> procedure were reported in the September 1994 Quarterly Report of GeoAudit <br /> Between 13 and 15 July 1994, a series of aquifer tests was peiformed at the site The <br /> procedures, results and conclusions of the aquifer testing were detailed in the September <br /> 1994 Quartetly Report of GeoAudit <br /> S 30 PROCEDURES <br /> 3 1 MONITORING OF MICROBIOLOGICAL ACTIVITIES IN GROUND WATER <br /> For this purpose, ground water samples were collected from selected wells on 11 and 23 <br /> January, 6 and 21 February, and 7 and 13 March 1995 The samples wei e collected for <br /> analysis of dissolved oxygen, pH, electrical conductivity (EC) and for microbiological <br /> enunciation Table 1 summarizes the results of theses activities through 13 March 1995 <br /> Following procedures described in Section 3 4 , samples for rniciobiological evaluation «ere <br /> collected in non-preserved 40-m1 VOA vials and transported to Applied Biotics in <br /> Bakersfield, California <br /> 3 2 SOIL VAPOR MONITORING <br /> Seven remediation wells (VW-1 through VW-7), five monitoring wells, which ale currently <br /> dry (MW-1 thiough MW-5), and MW-14 are connected to a Iow-pressure blowei that <br /> provides oxygen (air) to all wells, except to MW-1 and MW-2, on a continuous basis <br /> Oxygen, carbon dioxide and organic vapors were measured twice each month using field <br /> instiuments Percent oxygen and carbon dioxide were measured using a GasTech 350 <br />