The typical release limits identified in 10 CFR 835, 10 CFR 20, were based on Regulatory Guide 1.86. Since I do not have ready access to this reg guide, I am wondering if any readers could explain the basis for these values (ie, detection limit, dose-based, or?)? CLARK H GUNION, FACILITY REPRESENTATIVE USDOE, HANFORD SITE (509) 376-7193