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Kearny-KPF -2- 1 June 1989 uniform in nature throughout the soil column for most of the length of the ditch. At the southern most end of the ditch for approximately 30 feet, a brownish- yellow silty clay was observed. This soil was approximately 18 inches thick. A thin layer (1/8 inch) of caliche rested directly above this layer. Caliche was also observed throughout this soil . This substratum was not observed in other portions of the ditch due to the side wall erosion and the accumulation of debris. I observed the soils in the three proposed disposal areas in the west field. The field had been disced and therefore the upper three inches of soil were loose. I also observed the soils in the general area of Pond 1. The soils were a medium to dark brown clayey silt to silty clay. The soils observed in these areas did not appear to vary in nature and were very similar to those observed in profile in the ditch. INSPECTION SUMMARY: The soil at the Kearney-KPF site is classified as landlow adobe clay (U.S. Department of Agriculture, Series 1939, No. 10, May 1951) . The drillers log of B-4, located in the center of the west field describes the soils/sediments as predominantly alternating from a clayey silt to a silty clay to a depth of 59 feet. The Cation-Exchange Capacity milliequivalents per 100 grams (meg/100g) for soils at the Kearney-KPF site ranged from 22 to 42 meg/100g which represent average acid-neutralizing potential of the soil . (Canonie Environmental , Hydrogeologic Assessment Report, June 1986). The depth to ground water at the site is presently about 60 feet but was at 35 feet three years ago. Other than the ditch there are no surface water drainages near the field in the western portion of the facility that could be readily affected by disposal of the muds, cuttings or development waters. Based on this information, field observations and on the volume of wastes to be disposed and low concentrations of metals and volatile organic constituents reported in the muds, cuttings and development water, the proper disposal of these wastes in the field in the western portion of the facility should not pose a threat to water quality. Proper disposal includes incremental applications, using a spreader bar for the development and aquifer test waters, discing the wastes and soils until thoroughly blended, allowing the blended material to thoroughly dry prior to adding additional wastes, not allowing mixing of the three disposal areas and not performing the disposal during a rain event. CKW:ej Attachment