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Item No . 3 PC : 2-18-88 UP-88-20 Page 4 The following steps describe the treatment process : 1 . The concrete slab ' s curbing will be sealed to prevent spillage of soil and water . 2 . Soil samples will be taken for laboratory analysis (petroleum hydrocarbon content ) . 3 . Soil will be fertilized to bring nitrate and phosphorus level to at least 20 parts per million (ppm) and 5 ppm. Soil will be thoroughly mixed. 4 . Soil will be thoroughly wetted to bring the field moisture level in the soil to 30 - 70 percent . 5 . Prepare bacterial additive ; after incubation period, dilute and spray over the entire surface of the contaminated soil . 6. Thoroughly mix the entire contaminated soil mass . 7 . Sprinkle the soil surface with water to maintain 30 - 70 percent moisture condition at all times . 8 . Repeat Items 6 and 7 above on a daily basis to ensure that adequate oxygen and moisture reach the entire mass . 9 . Take samples of soil every two weeks for laboratory analy- sis to determine treatment progress . 10 . When laboratory analysis indicates that the soil ' s petro- leum hydrocarbon level has been reduced to meet the regula- tory agency' s acceptable standards , the cleansed soil is hauled away to its permanent resting place . 11 . The concrete slab will be "reloaded" as described above and treated as stated in Items 1 - 10 . Contaminated soil will be transported to the project site by dump truck for processing. The applicant indicates that a small tractor will be used on the concrete treatment slab to mix and aeriate the soil . Once the soil is "clean, " it will be loaded on haul trucks by the tractor for delivery to fill sites or cropland. All operations will be restricted to daylight hours. The potential exists for spillage of the contaminated soil material during the unloading process. In addition, mixing of the material during the treatment process may also result in