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9000030411 CON-17 tanks. Soils affected by the spillage were recently excavated to the top of the buried asphalt (about 4 inches deep) and replaced with imported fill material . No soil discolorations were observed on the surface of the fill material although the fertilizer may have migrated below the asphalt into underlying soils. Soils and clam shells beyond the eastern fence line, adjacent to the tank farm, were stained black. The discoloration extended about 130 feet along the fence line. The width of the discoloration was about 3 feet. An area near the southeastern corner of the facility was used to aerate soils from the underground storage tank excavation. These soils were known to have contained hydrocarbons. In addition, because they were excavated from an area near the facility weight scales, they may have also contained fertilizers and pesticides from vehicles using the scales. During aera- tion, any constituents potentially present in the excavated soils could have leached into the soil during precipitation. Green algal "blooms" were observed in several areas beyond the southern site fence line. The individual blooms were typically about 50 ft in area. The blooms may be attributable to the presence of fertilizers in these areas. The two dry wells installed near the fertilizer tank farm could not be located in the field during the WCC site inspection. According to Mr. Bill Jensen, water from the cooling coils of the Aqua Ammonia Converter, which contained aqua ammonia, was flushed down the dry wells. In addition, these wells may have provided a conduit for downwards migration of runoff at the facility. The runoff may have contained fertilizers, pesticides, or waste oils. 2-13