ML20029A634
| ML20029A634 | |
| Person / Time | |
|---|---|
| Issue date: | 02/14/1991 |
| From: | Michaud P NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-WM-39 NUDOCS 9102260226 | |
| Download: ML20029A634 (2) | |
Text
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hDN ud UNITED STATES p
4-NUCLEAR REGULATORY COMMISSION r
s-8 REGION IV URANIUM RECOVERY FIELD OFFICE
,o
- DENVER, L
DO 8025 FEB 141991 URFO:PWM Docket No. WM-39 040WM039520E s
MEMORANDUM FOR:-
Docket File No. WM-39 FROM:
Paul W. Michaud, Profect Manager
SUBJECT:
APPLICATION OF SUPPLEMENTAL STANDARDS AT VICINITY PROPERTY GJ-00461-CC, A PORTION OF GJ-90101-CC
. 0ackground-The: Radiological and Engineering Assessment (REA) for vicinity property-
_GJ-00461-CC,'was submitted to the NRC on January 4,1991.
In this submittal, 1
the Department of Energy (00E) requested NRC concurrence on the application of supplemental standards for this property.
Vicinity property GJ-00461-CC represents a portion of vicinity property _ GJ-90101-CC.
The property-involved is the area beneath the concrete floor and footers of Building 3 of the Whitewater Complex commercial property, -located at 940 South
- 10 St., Grand Junction, Colorado.
Tailings are assumed to have te.n placed on-the property prior _ to the construction of Building 3,:and exist to a depth of
'approximately;48 inches.
The building was constructed in 1979:and_ is used for storing concrete _ materials.
Its use is not expected to change in the Voreseeable future.
o
-' Discussion
.Two alternatives were examined; complete remediation and no remediation.
Partial remediation:was not evaluated since the efforts involved would be nearly.the same as for complete remediation. The cost of complete remediation is estimated at $78,893; and would involve removal _of an estimated 282 cubic yards of contaminated material.
The maximum ganima exposure rate is 16 micro R perLhour.
Complete remediation would reduce this to the background level of 12 micro R per hour. This incremental reduction in radiation levels would be of no benefit to any persons occupying the premises.
A person could spend-24= hours a day in a 16 micro R per hour radiation fielu and would receive only 28 percent of the permissible annual exposure allowed for unrestricted areas, as stated in 10 CFR 20.105.
These facts, as well as the estimated additional PMiURF0 D:URF0 0:URF0:RIV PWMicha
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FEl} 141991 50 years of useful building life and the likelihood that the us,e of this land will not change, provide a sufficient basis for determining that no significant risk to the public health will occur if supplemental standards are applied to this property.
Conclusion The use of this property, the fact that its use is not likely to change, and tho low health hazard compared to the relatively high cost of complete remediation justify the application of supplemental standards for this property.
The REA meets the criteria established in 10 CFR 192.21(d) necessary to apply _
supplemental standards.
The proposal-to perform no remedial action on this property is reasonable 1er the circumstances, and the requirements of 40 CFR 192.22(a) are at satisfied.
The staff concurs with the DOE in the application of supplemental standards for property GJ-00461-CC.
.f
//
Paul W. Michaud ProjectManager
. Case Closed:
040WO39520E cc:
MAbrams,-DOE PMann. DOE RQuillin, RCPD, CO-bec:
Docket No. WM-39 PDR/DCS URF0 r/f-ABBeach, RIV-LLUR Branch, LLWM PWMichaud WM-39/520E/PWM/91/01/24/M
.-.