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r <br /> Mitigation Steps: Teresi Trucking, Inc. proposes to undertake a bioremediation process <br /> for treatment of the stockpiled soil removed from the excavation to mitigate the <br /> petroleum hydrocarbon,contamination. After consultation with , Wm J. Hunter & <br /> Associates and Jim Thorpe Oil, Inc., Teresi Trucking, Inc. proposes the following steps <br /> to accomplish the above-mentioned mitigation: <br /> A. Prepare the area for setup of treatment machinery and soil placement. Place berm <br /> around treated soil stockpile area. <br /> B. Bring on-site and set up Foothill Engineering soil mixing equipment and 2,500 <br /> gallon "nurse truck" for mixing water, bacteria, nutrient, surfactant and enhancer. <br /> C. Inoculate 1000 gallons of water in the "nurse truck" with the specified combination <br /> of bacteria and nutrient S hours prior to the start of mixing process. Start circulation <br /> utilizing the trucks pumping system to assure a through mixture. Remediation <br /> ingredients will be mixed in 1000 gallons (2 gallons for each cubic yard to be treated) of <br /> water at the rate of I gallon of bacteria, 1 quart of nutrient, 1 quart of surfactant and 5 <br /> pounds of SBI enhancer to 23 cubic yards of material to be treated (see attached data <br /> sheets for names and properties of the materials to be used). <br /> D. Introduce the remaining ingredients into the "nurse tank" approximately 30 <br /> minutes prior to start of mixing operation to minimize foaming action. <br /> E. The contaminated soil will be fed into the hopper of the mixer, commencing <br /> treatment. Moisture levels will be kept at optimum by the operator. The treated <br /> material will be discharged at the end of the mixer by conveyor belt. The treated <br /> material will then be placed by loader on the asphalt in the predetermined area in depths <br /> of 5 to 6 feet. <br /> F. Treated soil will be placed in the prepared area to the southwest of the excavation <br /> approximately 100 yards away. <br /> The mixing process provides an ideal environment for the degradation of the <br /> hydrocarbon contamination. A homogeneous mixture of all the necessary ingredients <br /> that make the process work at maximum speed is created. Placing the bacteria, <br /> nutrient, surfactant, enhancer and optimum moisture directly on the contamination <br /> causes degradation actually to begin inside the mixer. Under ideal conditions the <br /> bacteria can double in number every 20 minutes. The mixing action also provides <br /> aeration which is extremely important. When the material is discharged from the <br /> machine it is about 50 percent air by volume. Thus the bacteria supplied with the <br /> proper support (nutrient, surfactant, inhancer, moisture and enough oxygen) can <br /> complete its digestion and conversion of the hydrocarbons before oxygen depletion and <br /> becoming anaerobic. As the food source (petroleum hydrocarbons) is diminished, the <br /> bacteria begins to consume itself until it is all gone. The end result is soil that is under <br /> 100 ppm TPH, rich in nutrients with the by-products of the degradation process being <br /> harmless CO2 and water. <br /> -2- <br />