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CENTRALOLLEY REGIONAL WATER QUALITY C«ROL BOARD INSPECTION REPORT DISCHARGER : KEARNEY-KPF 1 June 1989 LOCATION & COUNTY : Stockton, San Joaquin County CONTACTS ) : Harry Mossburger, Plant Manager INSPECTION DATE : 3 May 1989 INSPECTED BY : Camilla Williams ACCOMPANIED BY : Susan Timm, Department of Health Services OBSERVATIONS AND COMMENTS: This inspection was conducted to observe the proposed disposal areas in the field in the western portion of the facility. This portion of the site is a non- manufacturing area and is believed to be uncontaminated. Soils in this field were compared to the soils from the manufacturing portion of the facility and with the descriptive logs of wells drilled on-site. Per my conversations with representatives of Hargis and Associates, each disposal area for the drilling muds, cuttings development and aquifer test waters are to be placed along the western edge of the west field. Each and will be approximately 100 feet by 100 feet and will not be bermed. The muds and cuttings will be spread using a backhoe in approximately three inch lifts. The development and aquifer test waters will be spread using a spray attachment to the truck. It is estimated that approximately 17,000 gal of mud and cuttings will be disposed of in the two areas (8,500 gallons (gal) per 10,000 square feet (ft 2) ) and that there will be 42,000 gallons of development and aquifer test waters disposed of in the field (only 6,000 gallons are estimated to be development water). The facility will disc the soils after the application of the wastes until all the wastes are blended. Discing should occur by the end of July. A map of the proposed disposal areas is attached. The west field is bordered on the western edge by a ditch. The ditch is approximately 900 feet in length, 10 feet wide and is four feet deep at the northern end and three feet deep at the southern end. A pipe inlet or outlet in the ditch was not observed. The Southern Pacific Railroad parallels the ditch to the west and lies approximately ten feet above the floor of the ditch. There is no berm along the western edge of the field. The western edge of the west field was previously fenced as evidenced by the fence posts and rusty barbed wire along the east wall of the ditch. I observed the soils in the east side wall along the entire length of the ditch. The predominant soil type is a medium to dark brown clayey silt to silty clay with small to trace amounts of sand. The soil had a blocky structure due to drying and the cracks were generally 1/16 inch wide. When the soil was crumbled it had small (1/16 inch wide) hard, prismatic structures. The soil when wetted readily absorbed moisture and had a moderate to low plasticity. The soil was REVIEWED BY: