ARCHIVED REPORTS XR0001595 - Laserfiche WebLink

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On February 2, 1994, approximately 90 DOT drums containing soil cuttings and purge water were treated with a bacteria] inoculum The drums represented an accumulation of soil cuttings and purge water from monitoring well installations and samplings over the past few Iyears The lid for each drum was removed and the bactenal inoculum was placed directly onto the contents of each drum After inoculation was completed, each lid was replaced On .Tune 21, 1994, water samples were collected from five inoculated drums The samples were transported to a state-certified laboratory and composited for analysis No petroleum hydrocarbons were detected in the composite water sample from the treated drums On June 22, 1994, three soil samples were collected from drums containing soil cuttings The samples were transported to a state-certified laboratory and composited for analysis TPH as gasoline was detected in the composite soil sample at 3 1 ppm, no BTE&X were detected in the composite soil sample Results of the drum treatment provided encouraging results for the treatment of both hydrocarbon impacted sod and groundwater Based upon the results of the pilot study and the drum treatment, a full-scale soil inoculation was initiated in August 1994 2.3 Full Scale Bioremediation Inoculation On August 16, 1994, full-scale inoculation of the site was initiated At that time, approximately 1,200 gallons of inoculum were introduced into wells on-site A total of nine monitoring wells, one extraction well and six remediation wells were inoculated Both soil and groundwater were inoculated during the full scale inoculation Packers were rused in several wells to allow the direction of inoculum into specific zones The packers used were non-pneumatic because a 100 percent seal was not necessary Details of the inoculation procedure were reported in the September 1994 Quarterly Report 2.4 Aquifer Testing ' Between July 13 and 15, 1994, a series of aquifer tests were performed at the site Two slug tests were performed on monitoring well MW-13, a step test was performed on well EW-1, and a pumping test was performed on well EW-1, with drawdown measured in surrounding t wells The procedures, results and conclusions of the aquifer testing were detailed in the September 1994 Quarterly Report 1 30 PROCEDURES 3.1 Bioremediation Monitoring ' In accordance with the Proposed Revised Monitoring and Reporting Program No 94-701, G-1.9-1 A.6i SarvKes Inc `1 Qvanerly P po 02 4111 33 G2 EWQM6 1