c. b If resources are available, the effort outlined in be tried in the Cactus crater vicinity. above should The test should be in the vicinity of USAF-RHL sample sites 9, 10, 27, 31 as shown on the Runit data map (to be provided). This effort should not be extensive. The Cactus crater area does - not exhibit the same characteristics as the FIG/QUINCE area. The effort will probably not be productive in the Cactus crater area, but potential gain justifies a limited experiment provided sufficient resources are available not to interfere with other operations. d. | Using an IMP, conduct in-situ surveys on the established 50 meter grid, to define the size of the areas contaminated to levels greater than 400 pCi/g PU 239/240. In order to minimize risk of contamination of the IMP, this need not include a detailed survey of the area within the 400 pCi/g isopleth. However, data taken should be directly contributory to the full survey required for cleanup and certification. This effort should be confined to the FIG/QUINCE area and the Cactus crater area as indicated by the con- tamination isopleths on the YVONNE June-July 1977 aerial survey data. e. Using backhoes, FRST, and other resources as available, perform soil prcefiling surveys in the central area (between FIG/QUINCE and Cactus crater arezs) where no profile data is currently available. profiles should be sufficient. Ten to 15 Location and spacing of the sampling sites must be coordinated between JTG and ERSP and must lie on the 50 meter grid _ lines or agreed subdivisions thereof. Sampling locations selected must directly contribute to data required for cleanup survey and for certification. This effort should be initially limited to those areas selected for stockpiling contaminated debris and contaminated soil. i below for sampling techniques and analyses.) (See -h and