ML20043F967
| ML20043F967 | |
| Person / Time | |
|---|---|
| Issue date: | 06/01/1990 |
| From: | Randy Hall, Michaud P NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML20043F964 | List: |
| References | |
| REF-WM-39 NUDOCS 9006180369 | |
| Download: ML20043F967 (3) | |
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te UNITED STATES z.
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REGION IV
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URANIUM RECOVERY FIELD OFFICE
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D O 90235 JN -l 1990 URF0:PWM Docket No.4WM-39 040WM039640E' y
j MEMORANDUM FOR:-
Docket File No. WM-39 FROM:~'
Paul W. Michaud~
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'l Project Manager
SUBJECT:
APPLICATION OF SUPPLEMENTAL STANDARDS AT VICINITY I
i PROPERTY GJ-97008-0T
Background
The Radiological and Engineering Assessment (REA) for vicinity property 1
GH-97008-0T was submitted by the DOE on January 30, 1990, for NRC concurrence 1
on.the. application of' supplemental standards.-
l Discussion.
This: property is.a strip of land approximately 10-feet wide, adjacent to the edge of. North Avenue in Grand Junction, Colorado.
The REA focuses on i
contaminated mill tailings which surround a 3 and 4-inch diameter water line l
swithin this property.
Four remediation alternatives were considered, including complete, partial, and 1
no remediation with the application of supplemental standards.
The partial remediation option-is estimated to cost $197,440, but would involve a high risk
'of damaging,the existing water line which cculd result in additional costs and a disruption of water service provided by this line.
Partial remediation would-
'1 lower the surface gamma exposure-rate to background levels, but would not a
eliminate radon emissions from the tailings which remain.
In addition, it would not be possible to separate the clean fill placed'during partial
=remediation from the remaining contaminated material in the future.
The total-volume'..of contaminated material would therefore be greatest under partial remediation.
These facts indicate that partial remediation is not a desirable course of action.
The cost of complete remediation is estimated to be $329,784. The estimated volume of contaminated: materials which would be removed is 3,600 cubic yards.
The land is not inhabited, and its use is not expected to change.
The maximum surface gamma exposure rate is 51 micro R per hour.
Background levels for this jp[ M060; PDC
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-2 JUN -l 1990 area are 13 micro R per hour.
A person spending 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> a day in a 51 micro R
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e per hour radiation field would not exceed the permissible annual exposure for-unrestricted areas-of 10 CFR 20.105.
The greatest potential health risk is to i
' utility workers who perform repairs in trenches.
This subject was addressed in a Utility Workers Health Risk Analysis, which is incorporated by reference to-this REA.
The~ NRC approved the Utility Workers Health Risk Analysis on April 26, 1990.
These facts provide a sufficient basis to conclude that no significant risk to the public health will occur if supplemental standards are applied to this property.
Conclusion 5
'The location of the property, the fact that the land use is not likely to change, and.the low public health hazard compared to the high cost of complete remediation justify the application of supplemental standards for this property.
The REA meets the criteria established in 40 CFR 192.21(c) necessary to apply q
supplemental standards.
The proposal for no remedial action on this property is reasonable under the circumstances and the requirements of 40 CFR 192.22(a)-
are also satisfied.
The' staff concurs with DOE for the application of supplemental standards for vicinity property GJ-97008-0T.
The staff is concerned with the post-UMTRAP disposal of contaminated mill tailings which remain in place as a result of the application of supplemental standards.
Though supplemental standards have been appropriately applied, as in this case, utility line repairs are certain to generate contaminated material which will have to be disposed of for years to come.
This is an important issue,:with potential impacts on the public health.
The State of 4
Colorado and DOE are working to address this issue and will keep the NRC informed.
b Paul W. Michaud Project Manager f
Rafon E. Hall '
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D4 rector Case Closed:
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