ARCHIVED REPORTS XR0000155 - Laserfiche WebLink

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IfierNIVIRC.C. SACRAMENTO h The Ashley Road facility has an expanse of lawn on the southwest and northwest sides of the building. This area would be utilized as the operational site for the bioremediation and is shown in Figure 5-1 . R Initially, the site would be surveyed to determine where moisture would drain. An earthen berm approximately 15 inches high would be constructed around the perimeter of the sites from noncontaminated soil . Leachate collection locations would be incorporated if ground slope permits. The entire bermed site would be lined with heavy gauge polyethylene sheeting. Upon this sheeting, the contaminated soil would be laid out to a uniform depth of approximately nine to 12 inches. A coordinate grid would be established (FPA SW846) for the site in order 1 to determine where soil samples submitted for analyses had originated. From this coordinate system a base line sampling would be made and submitted to the laboratory for TPH analyses. Fertilizer containing the nitrogen and phosphorus necessary for bacteria growth would be spread over the entire plot. The soil would be rototilled in order to distribute the fertilizer and break up any soil clods. Preparations would then be completed for the addition of bacteria. w Bacteria suitable for the remediation of diesel contaminated soil are readily available commercially. Generally the bacteria are freeze-dried and require rehydrating prior to their application. Once hydrated, the bacteria and water are sprayed over the soil plot until the desired soil ! moisture level is obtained. Once inoculated with bacteria a period of approximately 12 weeks will be required for the bioremediation to be completed. During this period, a number of support activities will be ongoing. The soil will + need to be turned over by a rototiller two to three times weekly. Fertilizer will be added every two weeks and water sprayed over the plot 1 17 1