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Marley Cooling Tower Company 2 June 25, 1986 necessary before developing the mitigation plan. The regulatory agencies did not agree with this statement, and indicated that they would express their concerns when they reviewed the workplan for future activities. There are three options in the retort pit area. 1. Do nothing. 2 . Try to leach out contaminates. 3 . Try to fix contaminants in place. Jeanine Jones said that DHS will not sign off on the do nothing option and that leaching out contaminants can create a problem by spreading contamination to other areas. Excavation was another option discussed. Dick Landon said that MCTC does not want to consider this option. They would prefer to keep the contamination on their own property where they can control it and in turn this would help reduce the volume of contaminants going to land disposal. Mitigation Alternatives Alternatives for remediating contaminated ditch soils would be capping or excavating with the possibility of temporary storage in the stormwater runoff pond before taking them to a Class I disposal site. Alternatives for soil and groundwater would be containment or pumping and treating. In order to make decisions regarding possible extraction and treatment alternatives a historical record of data is helpful. It was decided that water levels would be measured monthly for 3 months on the 200 and 300 series wells and MW6 . Water samples will be analyzed for total and hexavalent chromium for these wells along with a one-time analysis for standard minerals (to investigate possible commingling of source waters) . The target dates are July 1, August 1, and September 1. After this data is collected it will be decided if it will be necessary to continue collecting either water level data or sampling and analysis data. Bob Fujii requested one nitrate analysis of each of these wells in any one of these monthly sampling efforts. Stormwater Pond Bob Fujii will verify MCTC' s interpretation regarding the need for a hydrogeological assessment report (HAR) . MCTC states in their workplan, dated June 19, 1986, that Article 25208 . 8 of the California Hazardous Waste Act stipulates that the HAR is intended only for facilities which will remain in operation after July 1, 1988 or which will be operated after January 1, 1988 with an exemption from the required double liner system. Once the treatment system is operational and the pondwater is treated MCTC wants to pump and treat groundwater. The RWQCB will require reapplication of their NPDES permit for treatment and discharge of groundwater. Regarding the NPDES permit, copper is the limiting contaminant for impacts to biota. The pond will not be receiving runoff water during the next rainy season. Runoff