20. The group discussed time frames and future meetings. It was apreed that 90 days appeared to be a reasonable target for obtaining data for the characterization. Data only for certification could be obtained during cleanup of Runit. The group would plan to meet again, at the call of the Chairman, after the characterization data is available. 21. The chair addressed the question of "plowing" to further homogonize Runit soil, thus reducing the "hot spot" concentrations. Mr. Yoder stated that cleanup experience so far indicates that we have had to go back repeatedly to cleanup to new, lower levels. Plowing will simply make such future cleanup more difficult and he strongly recommends against plowing. Further discussion indicated that plowing generally tends to lower average concentrations, and if the primary problem is air resuspension, plowing may help. However, in the specific case of Runit plowing might result in increasing surface levels by bringing subsurface contamination to the surface. This condition would be worse than doing nothing. It was generally agreed that plowing should not be used to meet cleanup criteria. After cleanup plowing may be considered to further reduce concentration in "hot" areas. However, if plowing is used, for any reason, it must be fully justified and defensible. Plowing should in all cases be kept shallow, on the order of six inches. . 22. The concept of limiting disposal soil quantities by spreading lower level contaminated soil from other islands on Runit was discussed. It was agreed that leaving such soil uncontained on Runit was preferable to leaving it on other islands of greater potential benefit. If this concept is used the soil should not be spread on Runit. The soil should, instead, be used to fill in holes, left by cleanup of Runit, and/or left in one stockpile. Whichever is done the area should be clearly identified and delineated for future reference. re-assay of the soil would be necessary for certification purposes. A 23. The group indicated a consensus that amounts of soil excised, amounts of soil entombed, and amounts of soil left uncontained should be recorded. An estimate of the curie content of activity entombed and left uncontained should be recorded for future use. This could be done by sampling truckloads and estimating content thereof. 24. The chair thanked the attendees and outlined his plan for report and minutes submission. The conference adjourned. me ee ms ee ‘ nee TE rt ge ‘ . LE OMPY raeeeme , oy an ‘y e re ; amp eee ye a