Document: NRC Regulatory Guide
Document ID: 688895c2-d1d9-44f3-9c79-3cf0daa88510
Document Type: regulatory_guide
Title: 
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML0037/ML003739541.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.5
CFR Part: 
CFR Title: 

Content:
cm deep made of 0.16-cm-thick cold-rolled steel, welded at the comers). Plastic bags, 52 x 23 x 0.02 cm (20i x 9 x o0o00 in.) Mortar trowel Long flat-bladed knife Meter stick (or 24-in. ruler) One 1.5 m length of two by four Tarpaulin D. Soil Sample Preparation I. Procedure a. Spread out sample on a plastic sheet and allow it to air dry. This may take three days or more. b. Break up soil aggregates and pull apart the topsoil plugs (consisting of vegetation and mot mat). With a pair of scissors, cut up the vegetation so that it can eventually be distributed homogeneously. c. When the sample is completely dry, weigh the entire sample to ±50 grams. d. Remove large rocks (>2.5 cm), weigh separately, and discard. (For gravelly soil, it may be desirable also to screen out the greater-than.2-mm fraction after appropriate treatment of the samnle to break up soil aggregates.) e. Crush the entire soil sample, then blend for about 30 minutes. f. Spread out the sample, mark off quarters, and take scoopfuls from each quarter consecutively until approximately 3 kilograms have been collected. g. Pass this subsample of soil through a grinder or pulverizer and transfer to a one-gallon wide-mouth polyethylene bottle. 2. Equipment Scale-Capacity of -50 kg Crusher -To precrush rocks to more suitable size for pulverizer Pulverizer-For pulverizing to about 100 mesh Blender-Capacity "-'0.05 6 m3 (2 ft 3) E. Reporting of Data Results should be expressed in nanocuries per gram of dry soil (total soil): the field bulk density should be recorded, as well as the area and depth sampled, to provide information necessary to also calculate and express contaminant activity per unit area. II. Method of Nevada Applied Ecology Group for Sampling and Sample Preparation of Nevada Test Site Soil (modified for Regulatory purposes) The method developed specifically for the Nevada Test Site under the auspices of the Nevada Applied Ecology Group should be applicable to other similar soils. The "ring" and