ML20042F539
| ML20042F539 | |
| Person / Time | |
|---|---|
| Issue date: | 04/10/1990 |
| From: | Randy Hall, Michaud P NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-WM-39 NUDOCS 9005090045 | |
| Download: ML20042F539 (3) | |
Text
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fhd na ase UNITBD STATES NUCtEAR REOULATORY COMMISSION
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Reel 0N IV URANtUM RE VE PIELD OPPICE DENVER.COLoRADOsets
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L APR 101990 '
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Docket No. 40-WM039 r
040WM039380E MEMORANDUM FOR:
Docket File No. 40-WM039 l
FROM:
Paul W. Michaud, Project Manager
SUBJECT:
APPLICATION OF SUPPLEMENTAL STANDARDS AT VICINITY PROPERTY DU-616(S)
Backaround
~The Radiological and Engineering Assessment (REA) for. vicinity property DU-616(S) was submitted on July 27, 1989, in which the Department of t
Energy (DGE) requested NRC concurrence on the application of supplemental l
standards.
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Discussion
'This property lies across a creek from a former uranium mill site, and consists mainly of'a creek bank and area adjacent to a highway.
Surveys revealed contamination present to depths of 20 feet in some locations.
The proposed remediation consists of removal of the top 18 inches.of contaminated material from.most of the property with the exception of an: area of steep sloped creek bank.
The estimated cost of complete remediation is $910,850 more than the proposed remediation's cost of $96,550.
The land is not inhabited and a portion of the 3 property is part of the highway right of way.
The land usage in this area is A not expected to change, and there are no clear benefits to public health from=
complete remediation.
The' estimated volume of' residual radioactive material is 16,458 cubic yards.
t The location of this material is such that it will most likely remain in place.
When the proposed remedial actions are completed, the maximum surface gamma exposure rate will be 30 micro R/hr.
Background for this area is 4
14 micro R/hr. A person spending 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> per day in a 30 micro R/hr radiation field would receive 263 millirem in one year, which is nearly half that
- permitted under 10 CFR 20.105 for unrestricted areas.
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2 APR 101990 Conclusion The location of the contaminated material, the fact that the land use is not likely to change, and the low public health hazard compared to the cost of complete remediation justify the application of supplemental standards for this property.
3 This REA meets the criteria established in 40 CFR 192.21(c) necessary to apply supplemental standards.
The proposed remedial actions are reasonable under the circumstances and the requirements of 40 CFR 192.22(a) are therefore satisfied.
The staff concurs with 00E that suppleniental standards be applied for vicinity property DU-616(S).
GL'u,wuaLe Paul W. Michaud P
ect Manager Approved by:
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t Rapion E. Hall Director Case Closed:
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1 CONCURRENCE:
DATE:
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