Soil Remedial Action Guidelines Radionuclide Am—241 Surface Soil Guideline (pCi/g above background) Pu-4l Pu-- 239,-240 Pu -238 Natural uranium U-238 Th—-230 Ra--226 . Cs—137 sr—90 H-3 (pCi/ml Soil moisture) Loe Alamos 20) 800 100 100 79 79 300 15 80 100 5,200 Reference Healy 1977 Healy 1977 Healy 1977 Healy 1977 Gilbert et al. 1983 Gilbert et al. 1983 Gilbert et al. 1983 Gilbert et al. 1983 Healy et al. 1979 Healy et al. 1979 Appendix B ofORO—831