1.0 SCOPE
1.1 Purpose
The purpose of this sampling and analysis plan is to demonstrate that the release criterion have not been exceeded. The objective of the final status survey is to demonstrate that residual radioactivity levels meet these release criterion. The methodology used to make this determination is detailed.
1.2 Applicability
This plan is applicable to Chem Nuclear Systems, LLC (CNS) and its subcontractors for work on the BOMARC Accident Site Plutonium Remediation Project (IRP Site RW-01) at McGuire Air Force Base, New Jersey.
2.0 REFERENCES
2.1 NUREG 1575, Multi Agency Radiation Survey and Site Investigation Manual (MARSSIM), December 1997,
2.2 Final Report for BOMARC Missile Accident Site (RW01), November 25, 1997,
2.3 NUREG 1505, A Nonparametric Statistical Methodology for the Design and Analysis of Final Status Decommissioning Surveys, 1995,
2.4 Record of Decision, BOMARC Missile Accident Site, McGuire Air Force Base, New Jersey, November 1992,
2.5 American Society for Testing and Materials (ASTM). 1998 Annual Book of ASTM Standards,
2.6 International Air Transport Association (IATA), 1999, Dangerous Goods Regulations. January 1, 1999,
2.7 USACE, 1994. Requirements for the Preparation of Sampling and Analysis Plans. EM 200-1-3. Prepared by U.S. Army Corps of Engineers (USACE), Washington, D.C., 1 September 1994,
2.8 USACE, 1996. Chemical Data Quality Management for Hazardous, Toxic and Radioactive Waste Remediation Activities, EM 1110-1-263. Prepared by U.S. Army Corps of Engineers (USACE), Washington, D. C. 1 April 1996 and
2.9 HASL-300, "The Procedure Manual for the Environmental Measurements Laboratory", 28th Edition, February 1997.
3.0 STATEMENT OF PROBLEM
The Record of Decision (ROD), Reference 2.4, for the BOMARC Missile Accident Site specifies remediation of soil with plutonium (Pu-239/240) associated contamination levels exceeding 8 picocuries per gram (pCi/g). This is considered the Dose Concentration Guideline Level (DCGL). Building structures with removable alpha contamination exceeding 20 disintegrations per minute per 100 square centimeters (20 dpm/100 cm2), and/or building surfaces with fixed contamination levels exceeding a maximum of 300 dpm/100 cm2 or an average of 100 dpm/cm2 over 1 m2 will be remediated.
The question to be answered about this site is; "Is the level of residual radioactivity in the survey units on this site below the release criterion?" The decision will be to determine whether or not all the survey units on the site satisfy the release criterion. The null hypothesis (Ho) tested for this plan is that residual contamination exceeds the release criterion. The alternative hypothesis (Ha) is that residual contamination meets the release criterion.
4.0 AREA CLASSIFICATION AND SURVEY UNITS
Area classification in accordance with Reference 2.1 was established from data from the Characterization Report, Reference 2.2. Reference area soil samples are not necessary given that 1) background americium and plutonium levels in soils is non-existent, or, at most, in trace amounts, significantly lower that the DCGL; and
2) soil sample analysis is a radionuclide specific measurement. Background for use of gamma survey instruments, such as the FIDLER, will be done on areas of similar construction or soil type, where no known contamination exists. Background for surface scans of structures will be taken on structures of similar construction where no known contamination exists. Survey units are physical areas consisting of structures or land, which are divided into specified sizes where a separate decision will be made as to whether or not that area exceeds the release criterion. Survey units will be established that include only one classification of area, i.e. a survey unit cannot have Class 1 and Class 2 areas. Survey unit size that is adjusted will take into consideration the potential for small areas of elevated activities. Smaller survey units may be considered appropriate as determined by the site Certified Health Physicist in conjunction with the Project Manager and the contracting officer's representative.
|
