Off-Site Radiation Exposure Review Project: Phase 2 soils program

Closure Report for Corrective Action Unit 394: Areas 12, 18, and 29 Spill/Release Sites, Nevada Test Site, Nevada: Revision 0

“…The results did not indicate the presence of man-made radionuclides at concentrations greater than, or statistically distinguishable from, background concentrations (US Ecology and Atlan-Tech, 1991;McArthur and Miller, 1989). -Tech, 1991;McArthur and Miller, 1989).…”

“…Calibration verification did not meet criteria or was not performed. -Tech, 1991;McArthur and Miller, 1989).…”

Corrective Action Investigation Plan for Corrective Action Unit 127: Areas 25 and 26 Storage Tanks, Nevada Test Site, Nevada (Rev. No.: 0, August 2002)

“…The MDCs listed in Table 3-3 are typical default levels available for a commercial radioanalytical laboratory. (McArthur and Miller, 1989;and DOE/NV, 1999). The PAL is equal to the MDC for isotopes not reported in soil samples from undisturbed background locations or if the PAL is less than the MDC.…”

“…• The PALs for radionuclides are isotope-specific and defined as the maximum concentration for that isotope found in samples from undisturbed background locations in the vicinity of the NTS (McArthur and Miller, 1989; US Ecology and Atlan-Tech, 1992; DOE/NV, 1999). The PAL is equal to the MDC for isotopes not reported in soil samples from undisturbed background locations or if the PAL is less than the MDC (see Table 3 The comparison of laboratory results to PALs will be discussed in the CADD.…”

“…Background is considered the mean plus two times the standard deviation of the mean for sediment samples collected by the Nevada Bureau of Mines and Geology throughout the Nellis Air Force Range (NBMG, 1998;Moore, 1999). • The PALs for radionuclides are isotope-specific and defined as the maximum concentration for that isotope found in samples from undisturbed background locations in the vicinity of the NTS (McArthur and Miller, 1989;DOE/NV, 1996).…”