Document: NRC Regulatory Guide
Document ID: eb3f5778-b26b-4ba0-9962-f7101bddfff7
Document Type: regulatory_guide
Title: (Rev. 3005)
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML0037/ML003739900.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.8
CFR Part: 
CFR Title: 

Content:
edibefore operation in the field or several should be mounted in series to prevent loss of iodine. tAny soil sampling and analysis program capable.of measuring 0ong-term accumulation of radioactivity, such as presented in HASL-300 or Regulatory Guide 4.5. is ac captable to the staff (HASL-300, HASL Proced*res Mantel, J.H. Harley, Ed., Rev. August 1974). ý ' " ,gFor facilities not locatedK on a stream, the "upstream sample" shduld be taken at a distance beyond significant influence of the discharges. The "downstream" sample should be taken io an area beyond the olutfall, which would aliow for mixing and dilution. "Upstream" samples in a tidal area must be taken far enough upstream to be beyond the plant influence and should be above the salt water intrusion. Generally, salt water is not sampled except when the receiving water is utilized for recreational activities. 'Composite samples should be collected with equipment (or equivalent) which is capable of collecting an aliquot at time intervals which are very short (e.g., hourly) .relative to the compositing period (e.g., monthly). lGround water samples should be taken when this source is tapped for drinking or irrigation purposes in areas where the hydraulic gradient or recharge properties are suitable for contamination. kAquatic plants and animals to be sampled should be specified as closely as practicable, e.eg;:attached and, floating algae, floating and rooted aquatic plants, migratory and nonmigratory fish, zooplankton, phytoplankton, and shellfish. Nomenclature by common name should be used. 'Other sampling locations may be required for certain sites. For further guidance see pertinent footnotes in Table 1 of EPA document ORP/SID 72-2, Environmental Radioactivity Surveillance Guide, U.S. Environmental Protection Agency, June 1972. mMilk samples should be- collected and analyzed weakly in areas where the calculated dose to a child's thyroid exceeds 15 mrem/yr. Sampling and analysis should be semimonthly in areas