Regulations.gov document: USEPA. 1990a. U.S. Environmental Protection Agency. Office of Drinking Water. Occurrence and exposure assessment for radon in public drinking water supplies. Prepared by Wade Miller Associates, Inc. for U.S. EPA Office of Drinking Water under contract 68-03-3514. September 25, 1990. Washington DC: U.S. Environmental Protection Agency [PHASE-III-RADS-III-D2D-110]
Regulations.gov document: USEPA. 1990a. U.S. Environmental Protection Agency. Office of Drinking Water. Occurrence and exposure assessment for radon in public drinking water supplies. Prepared by Wade Miller Associates, Inc. for U.S. EPA Office of Drinking Water under contract 68-03-3514. September 25, 1990. Washington DC: U.S. Environmental Protection Agency [PHASE-III-RADS-III-D2D-110] — retained record — High Signal