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Jeanine Jones 2 July 22 , 1986 Under interim measures on page 5, which "other" well locations will be used to retard groundwater contaminant movement? Is there an intention to use wells other than MW6 and MW213 , which we discussed at the June 19, 1986 meeting? In addition to the general schedule on page 11, the workplan should have a schedule or time table to show when well drilling, soil sampling, data evaluation and report submittal will take place. The workplan should contain the following information with regard to the groundwater assessment. o Exact location for proposed wells and borehole. o Name of the property owner of the well locations, if other than MCTC. o Drilling method to be used. o Name of laboratory which will do water analysis. o Name of company which will do geophysical logging of the borehole. The portion of the workplan regarding additional soil sampling should be expanded to include the following information: o Name of person and consulting company who will do soils assessment o Type of equipment used to take soil samples o Methods used to do sampling o Name of laboratory which will do soil analyses. The Kleinfelder Soil Assessment Report described the area of soil contamination under the retort pit as a truncated pyramid (page 32) . this appears to be an acceptable estimate of the shape of the contaminant plume. To further define the area of contamination, more soil sampling should be done in a radial area surrounding the retort pit area. It will be helpful for ion mitigation purposes to clearly define the extent of contaminat in the area between the retort pit and the pond. The potential for contaminant migration through the vadose zone (especially the sand channel under the retort pit) into the groundwater needs