f. Using backhoes, FRST, and other resources as available, perform soil profiling surveys in the FIG/QUINCE and Cactus crater areas. Sample locations and spacing must be coordinated between JTG and ERSP and must lie on the 50 meter prid lines or agreed subdivisions thereof. Sampling locations, insofar as possible, must be directly contributory to data needed for cleanup survey and for certification. This effort is intended to determine the limits of the subsurface contamination pockets indicated by soil sample data at sample points AEC 104, 111, 112; USAF-EPA 16, 12-1; and USAF-RHEL 8, 15, 32, 10, 31, 27 and 9. If possible, this profiling effort should await completion of the in-situ survey of not a necessity. YT A Es te” in-situ effort. above, but this is Profiling can be done before or concurrent with the It is envisioned that this profAling effort will use iterative “one-half distance" techniques to establish the size of the subsurface pockets showing contamination levels in excess of 400 pCi/g PU 239/240. g. As resources permit, continue soil profiling in other areas in northern half of Runit. Sample locations and spacing should be > we d directly contributory to data needed for cleanup survey and for certification es well as characterization. Additional samples should be venee TE UL RN Ane one tees tate ase taken in each of the three areas, FIG/QUINCE, Cactus crater, and the central grea. The objective is to further assurance of presence or ~..- absence of subterranian contamination. are found they should be defined as in If pockets of contamination f above.