Ground Condition The Plow X-1 plot is an area relatively clear of vegetation and debris and has not been heavily vegetated since the cleanup project began. Plots X-2 and X-3 were in areas which were windrowed in the fall of 1977 as part of the brush removal program prior to surveying or IMP measurements. Now, only ground cover type vegetation (grasses and morning glory vines) is present in those two areas. The Plow X-2 plot is near areas in which extensive blasting has taken place and may have been subjected to some Shrapnel. The Plow X-3 area contains some surface asphalt and concrete. 2. Primary Site a Plot Plan Consideration of the three sites led to the choice of Plow X-] as the actual experiment area. The area contained eight IMP locations and was sectioned off in blocks as shownin Figure B-9-7. Results of two surface contamination measurement techniques are also given in this figure. The data values above each center point (grid location) were determined by IMPing; those below the point are the average of four surface soil sample com posites. 25m 109 91.6 Oo oO oO oO 108 69.5 142 126 ¢—_—\— Soil 67.4 58.1 69.9 64.8 hg@—_—_—_——IMP oO oO 25 mM oO 113 62.2 79.2 75.2 13 14 15 16 @—_—_—_—_— Soil rag oO awe FIGURE B-9-7. Plow X-1 Plot Plan Showing Average TRU Concentrations From IMP and Surface Soil,pCi/gz my 1 48.8 Grid point designations are also shown at the edge of the plot, giving the 25 m survey locations. The two regions which were later plowed are indicated by wavy lines in rows 14 and 16. Radioactivity Profile Characterization An extensive sampling program was employed to define the radioactivity profile in the Plow X-1 plot. Figure B-9-8 shows the sampling array with the different sample types coded on the plot. Again, the wavy lines indicate those blocks which were plowed. ial -. 2 62.3 B-9-15