ML20248L998
| ML20248L998 | |
| Person / Time | |
|---|---|
| Issue date: | 06/09/1998 |
| From: | Joseph Holonich NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Rael G ENERGY, DEPT. OF |
| References | |
| REF-WM-67 NUDOCS 9806120216 | |
| Download: ML20248L998 (10) | |
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June 9, 1998 Mr. George Rael, Director U.S. Department of Energy Albuquerque Operations Office ERD /UMTRA P.O. Box 5400 Albuquerque, NM 87185-5400
SUBJECT:
ACCEPTANCE OF COMPLETION REPORT FOR AMBROSIA LAKE, NEW MEXICO, VICINITY PROPERTY AM-001S
Dear Mr. Rael:
The U.S. Nuclear Regulatory Commission (NRC) staff reviewed the Ambrosia Lake, New Mexico, Vicinity Property Completion Report (VP CR) for property AM-001S, northeast of the Ambrosia Lake site, which was submitted by U.S. Department of Energy (DOE) letter dated September 16, 1996. The NRC staff review resulted in six comments, which were forwarded to DOE by NRC letter dated November 28,1996. One of the six comments concerned the use of supplemental standards for soil cleanup for the area around the Anne Lee mine shaft. DOE responded to the NRC comments with e revised VP CR, submitted by letter dated December 16,1997, which also enclosed copies of the comment review worksheets. This revised VP CR was reviewed by the NRC staff, and some points requiring clarification were discussed with DOE by telephone. DOE subsequently provided documentation of the responses to the NRC staff questions by letter dated May 26,1998.
Concurrence by the NRC on this VP CR is required because special circumstances resulted in supplemental standards being invoked during remedial action. The NRC staff review of the use of supplemental standards, as well as the other five items raised in the staff's review of the VP CR, is documented in detail in the enclosed staff review report (Enclosure 2). In summary, the NRC staff concurs with the DOE position that the use of supplemental standards for the material is acceptable, due to the high estimated cleanup oost in comparison to the limited long-term reduction in maximum radiation dose for the wo,.. case assessment.
Thus, the staff concludes that information provided by the DOE in the Ambrosia Lake VP CR provides reasonable assurance that supplemental standards for soil cleanup have been properly applied at vicinity property AM-001S. The staff concurs that the use of supplemental standards and the remediation of the vicinity property were completed in accordance with the U.S.
Environmental Protection Agency standards. The signed NRC Review Form for Supplemental jl Certification of Vicinity Properties, showing NRC concurrence, is Enclosure 1.
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S G. Rael June 9, 1998 If you have any questions concerning this letter or the enclosures, please contact the NRC Project Manager, Ken Hooks, at (301) 415-7777.
Sincerely,
[D. Gillen for]
Joseph J. Holonich, Chief Uranium Recovery Branch Division of Waste Management Office of Nuclear Material Safety and Safeguards
Enclosures:
As stated cc: F. Bosiljevac, DOE Alb E. Artiglia, TAC Alb
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VP No.: AM-001 NRC Review Form for Supplemental Certification of Vicinity Properties The Department of Energy (DOE) has determined that the remedial action at the following vicinity property (VP) has been completed and thereby complies with supplemental standards invoked by DOE under 40 CFR, Subpart C, specifically Subsections 192.21 and 192.22.
1
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NRC cc,ncurrence for the Radiological Engineering Assessment (REA) given on:
[X]
Supplemental standards were not in the REA, special circumstances required that supplem I standards involved during remedial action.
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$ lh Yb Stev'en C. Hamp, DOE Certifidbtion Officer Datef
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Based on the information and certification provided by the DOE, the NRC:
DQ concurs that the remedial action at the subject VP has been completed under its authonty provided by the Uranium Mill Tailings Radiation Control Act (UMTRCA),
Section 104(f)(1) and as described in the Memorandum of Understanding (MOU),
Appendix A, Section 3.4.
[]l concurs, as above, except for the following conditions:
1.
2.
3.
. [] See attached sheets for any additional provisions.
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needs additional information to make a concurrence decision. This information consists of:
[- ] See attached sheets for any additional informational needs.
Ou. A OR n 6/9b8 NEC Concuning Official and Trle Date Joseph J. Holonich, Chief Uranium Recovery Branch Division of Waste Management Office of' Nuclear Material Safety and Safeguards
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i ENCLOSURE 1 f
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VP No.: AM-001 NRC Review Form for Supplemental Certification of Vicinity Properties The Department of Energy (DOE) has determined that the remedial action at the following vicinity property (VP) has been completed and thereby complios with supplemental standards invoked by DOE under 40 CFR, Subpart C, specifically Subsections 192.21 and 192.22.
[]
NRC concurrence for the Radiological Engineering Assessment (REA) given on:
[X ]
Supplemental standards were not in the REA, special circumstances required that supplem tal standards involved during remedial action.
A (ho 9 /d fI Stev'en C. Hamp, DOE Certifidtion Officer Date/
/
==__._____________s------
_=========
Based on the information and certification provided by the DOE, the NRC:
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concurs that the remedial action at the subject VP has been completed under its authority provided by the Uranium Mill Tailings Radiation Control Act (UMTRCA),
Section 104(f)(1) and as described in the Memorandum of Understanding (MOU),
Appendix A, Section 3.4.
[]
concurs, as above, except for the following conditions:
1.
2.
3.
[] See attached sheets for any additional provisions.
[]
needs additionalinformation to make a concurrence decision. This information consists of:
[ ] See attached sheets for any additional informational needs.
1 Ou. 2 OL L chh8 NRt Concurring Official and Title
' date Joseph J. Holonich, Chief Uranium Recovery Branch Division of Waste Management Office of Nuclear Material Safety l
and Safeguards
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ENCLOSURE 2 i
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U.S. NUCLEAR REGULATORY COMMISSION STAFF REVIEW OF REVISED COMPLETION REPORT FOR AMBROSIA LAKE VICINITY PROPERTY AM-001
' The U.S. Nuclear Regulatory Commission (NRC) staff previously reviewed the 1996 version of the Vicinity Property Completion Report (VP CR) for the Ambrosia Lake vicinity property (VP)
AM-001 (MK-F 1996), and provided comments on six issues to the Department of Energy (DOE)
(NRC 1996b). These issues were addressed by the DOE and its contractor, by revising the VP CR (MK-F 1997) and by providing responses to the NRC staff comments (DOE 1997). The NRC staff have also reviewed the revised VP CR (MK-F 1997) submitted to the NRC.
The VP CR describes the remedial actions (radiological cleanup) and verification activities performed at the VP. Tnis VP is an area of primarily windblown and waterbome contamination,
. adjacent to the designated mill site. While most of the VP appears to have been contaminated by windblown tailings, there are some areas with more complex conditions. To the southwest of the tailings pile, there was what appears to have been a pond, called Voght Tank. This pond, and the ditch leading to it from the mill site, are part of the VP and were contaminated to depths greater than most other areas of the VP. Also within the VP boundaries are the Anne Lee triine ~snaft and-three mine vent shafts. Supplemental standards for soil cleanup were proposed.
the area around the mine shaft.
This present review is concerned only with the resolution of the six issues identified in the NRC staff's previous review. The following discussion of these issues presents, for each issue, a summary of the NRC staff's previous comments, discussion of the DOE revisions and responses to comments, and the NRC staff conclusion.
COMMENT 1: PREVIOUS OPEN ISSUES, AMBROSIA LAKE PROCESSING SITE DRAFT COMPLETION REVIEW REPORT Summary of Previous NRC Comments There remained three open issues from the Ambrosia Lake processing site draft completion review report (NRC 1996a) that also applied to this VP. First, there was contradictory information about the background concentration of Ra-226 in soil. The Remedial Action Plan (RAP) for the processing site (DOE 1990) indicated a value of 1.0 pCi/g, while the Completion Report (CR) for the processing site (MK-F 1995) indicated 1.2 pCi/g. The VP CR, though, indicated a value of 1.5 pCi/g.
Second, the RAP indicated that Ra-226/U-238 ratios were used to distinguish tailings material from ore material. However, the CR and the VP CR did not indicate if and where such ratios were applied.
Third, there was insufficient information provided in the VP CR on the potential for Th-230 contamination on the VP.
Discussion -
Regarding the background Ra-226 concentration in soil, the revised VP CR indicates (page 6) the average value to be 1.2 pCi/g, the same value as determined for the processing site.
Regarding the use of Ra-226/U-238 ratios, the DOE contractor responses to comments (DOE 1997) stated that Ra-226!U-238 ratios were not used for this vicinity property.
'Regarding information on the potential for Th-230 contamination, the revised VP CR was updated to include results of the Th-230 analyses performed on at least 4% of the verification soil
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' NRC Rsvitw of'Rsvised VP CR for AM-001 2
May 1998
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samples. The NRC staff reviewed the Th-230 data, and there does not appear to be any.
indication of areas where the Th-230 concentration is significantly greater than that expected based on the Ra-226 concentration. As indicated in the NRC's previous comments 5 and 6, the the NRC staff considered Voght Tank and the ditch leading to it to be an area for which the potential for elevated Th-230 contamination should have been evaluated. In the Voght Tank area,
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there were 19 verification samples for which Th-230 analyses were performed. The analysis I
results for these samples showed Th-230 concentrations less than 2 pCi/g and generally consistent with the Ra-226 concentrations. Thus it appears that the Th-230 data do not show any areas where Th-230 would be of particular concern.
NRC Staff Conclusion The NRC staff conclude that the revisions to the VP CR and the responses to the NRC comments are acceptable.
COMMENT 2: APPLICABILITY OF UMTRA PROJECT STANDARDS Summary of Previous NRC Comment i
The descriptions in the VP CR did not clearly demonstrate whether the materials backfilled (by the VP site landownta) into the mine shaft and mine vent shafts were residual radioactive i
material (RRM). If the materials were RRM, the standards (including, potentially, supplemental i
standards) of 40 CFR 192 would apply.
Discussion Appendix B (page B-3) of the revised VP CR indicates that the mine shaft was backfilled with ore from off the UMTRA site, which is considered non-UMTRA material and thus not RRM. In the second response to comments (DOE 1998), the DOE contractor states that no RRM was left in place around the vent shafts. The NRC staff interpret this to also mean that no RRM was in the vent shafts.
NRC Staff Conclusion 1
- The information provided in the revisions to the VP CR and the responses to the NRC comments l
l' is acceptaHe to describe the materials backfilled in the mine shaft and vent shafts, and is thus i
l sufficient to determine that the EPA standards of 40 CFR 192 do not apply to the backfill material in the mine shaft and vent shaft.
COMMENT 3: COMPLETE DESCRIPTION OF REMEDIAL ACTION Summary of Previous NRC Comments The VP CR did not contain a complete description of the remedial actions that were performed
- for the Anne Lee mine shaft area and the areas around the three mine vent shafts. It also was unclear what radioactive material was left in place in these areas.
Discussion Appendix B, Application for Supplemental Standards, was revised in the revised VP CR. The RRM contamination remaining around the mine shaft is now more clearly described in this appendix as contamination that covers the area from the edge of the mine shaft to 2 ft outside the fence line around the mine shaft area. The estimated volume of this remaining contaminated 2
material was 3504 yd and the contaminated area is approximately 4588 ft. In the contaminated area, the Ra-226 concentrations were measured to range up to 452.8 pCi/g, and the average concentration was estimated to be 30.5 pCi/g.
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Regarding potential contamination around the mine vent shafts, the revised VP CR does not
' indicate any RRM backfilled in the vent shafts. The response to NRC comments (DOE 1997) l l
NRC R3vi;w of Rsvis:d VP CR for AM-001 3
May 1998 indicates that the vents were excavated to the edge of the 48 inch shaft. The second response to comments (DOE 1998) indicates that no RRM was left in place around the vent shafts. The NRC staff interpret this to also mean that no RRM was in the vent shafts.
NRC Staff Conclusion The NRC staff conclude that information provided in the revisions to the VP CR and the responses to the NRC comments is acceptable to describe remedial actions around the mine shaft and vent shafts, and to describe any remaining RRM in these areas.
COMMENT 4: JUSTIFICATION FOR SUPPLEMENTAL STANDARDS Summary of Previous NRC Comments The VP CR had recommended the use of supplemental standards based on safety concerns (40 CFR 192.21(a)) and based on unreasonably high cleanup cost relative to long-term benefits (40 CFR 192.21(c)). However, the VP CR did not state what the specific safety concems were. In terms of costs, the VP CR indicated that the cost of removing contamination from the 600-ft deep mine shaft, and then backfilling, would be extremely high. Additional details to justify the use of supplemental standards were requested by the NRC staff.
i i
Discussion
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First, as discussed regarding comments 2 and 3 above, the revised VP CR includes a more l
complete description of the RRM remaining at the VP. It is now understood that the backfill l
material in the mine shaft is not RRM, but was ore material from offsite. The remaining RRM, for which the use of supplemental standards is proposed, includes contamination that lies from the edge of the mine shaft to 2 ft outside the fence line around the mine shaft area.
Appendix B of the revised VP CR also contains additional information to justify the use of supplemental standards. Regarding the safety concerns, Appendix B (page B-3) indicates that the fill material placed in the mine shaft was not compacted and therefore the material is constantly settling, making work near the shaft dangerous.
The appendix also describes potential benefits from cleanup (reduction in dose) and the estimated costs. Measurements of gamma exposure rates were made, and Appendix B reports i
the range for ground-level measurements to be 6-25 pR/ hour, with the average over the contaminated area being 13 pR/ hour. The NRC staff note that all but one of the 17 gamma measurement locations were on the outside boundary of the supplemental standards area or
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outside the area. For the one location in the middle of the supplemental standards area, the i
gamma exposure rate was measured to be 45 pR/ hour at the ground surface and 68 pR/ hour 1 m above the ground, somewhat higher than the stated range. Based on the maximum (stated) exposure rate of 25 pR/ hour, a dose assessment was performed, that was indicated to be a worst case assessment. The result indicated that a person would have to spend 4000 hours0.0463 days <br />1.111 hours <br />0.00661 weeks <br />0.00152 months <br /> per year at the location of 25 pR/ hour exposure rate in order to receive a dose of 100 mrem in a year.
Appendix B (page B-10) of the revised VP CR further indicates that it is highly unlikely for an individual to be exposed for the amount of time necessary to receive a dose of 100 mrem in a year, due both to the length of time required and the remote location.
l Appendix B to the revised VP CR also describes costs of remediating the contamination that is proposed to be left in place at this VP. The cost for cleaning up this material was estimated to be
$166,140. Appendix B (page B-8) of the revised VP CR indicates that the work to clean up this remaining contamination would be dangerous to workers and would require a substantial amcunt of work and money compared to the benefits received from remediation.
I NRC Staff Conclusion L
NRC Review of Revised VP CR for AM-001 4
May 1998 The NRC staff agree that the remoteness and inaccessibility of the remaining RRM make it unlikely that any person would receive a significant radiation dose if the materialis left in place.
The cost of the cleanup and the existence of significant risks to workers appear to outweigh the potential benefits of removing the material. Thus, the NRC staff concur that the use of supplemental standards for this material is acceptable, due to the high cleanup cost relative to long-term benefits (criterion (c) of 40 CFR 192.21).
COMMENT 5: QA/QC AND THORIUM-230 ANALYSIS RESULTS Summary of Previous NRC Comments The VP CR did not provide results of required QA/QC analyses of soil samples and Th-230 analyses of soil samples.
Discussion I
As discussed regarding Comment 1 above, the revised VP CR includes the Th-230 analysis data. Regarding the QA/QC analyses, in the second response to comments (DOE 1998), the DOE contractor indicates that QA/QC data are documented in project functions other than VP CRs, audits in particular.
NRC Staff Conclusion The NRC staff accept that it is not necessary that the QA/QC data are documented in the VP CR.
As no specific problems related to QA/QC measurements for this VP have been noted by the NRC staff, the staff consider the state of documentation of QA/QC data to be acceptable.
COMMENT 6: CLEANUP OF VOGHT TANK AREA Summary of Previous NRC Comments From the wording in section 2.3 of the VP CR, it was not clear what the areal extent of remediation was in the Voght Tank area. In addition, the potential for Th-230 contamination in Voght Tank and the ditch had not been addressed.
Discussion In the revised VP CR, the descriptions of the boundaries of Voght Tank, and of the extent of remediation in the Voght Tank area, are clarified. The revised VP CR (page 5) indicates that the Voght Tank area had been incorrectly drawn on engineering drawings, with boundaries incorrectly shown beyond the actual berm. The.amediation was performed out to the berm around the Voght Tank. In the response to cor..ients (DOE 1997), the DOE contractor indicated that due to heavy mining in the area, the Voght Tank was only excavated to the berms and that anything outside the berms is considered non-UMTRA. In the second response to comments (DOE 1998), the DOE contractor furtherindicated that the boundaries of the VP were set by the DOE and no surveys were performed outside of the boundaries; remediation was performed up to the preset boundaries.
As discussed regarding Comment 1 above, a review of the Th-230 data presented for the Voght Tank area did not show any areas where Th-230 was of particular concem.
NRC Staff Conclusion Since cleanup of the Voght Tank was performed up to the boundary of the VP (the berm), the NRC staff agree that the areal extent of remediation in this area was sufficient. The Th-230 data show that there did not remain any areas within '.he Voght Tank for which Th-230 was of particular concem.
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NRC Review of Revised VP CR for AM-001 5
May 1998 NRC STAFF OVERALL CONCLUSION The NRC staff concludes that the revisions to the VP CR and the responses to NRC's comments are adequate, and the six issues discussed here should be considered closed. The staff thus also concludes that information provided by the DOE and its contractor in the VP CR and in other documents provides reasonable assurance that remediation of this VP and the use of supplemental standards were completed in accordance with the EPA standards.
REFERENCES DOE (U.S. Department of Energy).1990. Remedial Action Plan and Site ConceptualDesign for Stabilization of the inactive Uranium Mill Tailings Site at Ambrosia Lake, New Mexico, Final.
September 1990.
DOE (U.S. Department of Energy).1997. Vicinity Property No. AM-001S, UNC Property, Northeast of Ambrosia Lake Site, Ambrosia Lake, New Mexico. Letter from L.A. Woodworth to J.J. Holonich, Uranium Recovery Branch, Division of Waste Management, Office of Nuclear Material Safety and Safeguards, U.S. Nuclear Regulatory Commission, with enclosed responses to comments, dated December 18,1997. DOE, Environmental Restoration Division, Uranium Mill Tailings Remedial Action Team.
DOE (U.S. Department of Energy).1998. Title goes here. Letter from L.A. Woodworth to J.J.
Holonich, Uranium Recovery Branch, Division of Waste Management, Office of Nuclear Material Safety and Safeguards, U.S. Nuclear Regulatory Commission, with enclosed responses to comments, dated May 26,1998. DOE, Environmental Restoration Division, Uranium Mill Tailings Remedial Action Team.
MK-F (MK-Ferguson Company).1995. Ambrosia Lake, New Mexico, Draft Completion Report.
August 1995.
MK-F (MK-Ferguson Company and Rust Federal Services, Inc.).1996. Vicinity Property Completion Report at AM-001S, Ambrosia Lake, NM. May 2,1996.
MK-F (MK-Ferguson Company and Rust Federal Services, Inc.).1997. Vicinity Property Completion Report at AM-001S, Ambrosia Lake, NM. Revised report, July 7,1997.
NRC (U.S. Nuclear Regulatory Commission).1996a. Draft Completion Review Report for the Remedial Action at the Ambrosia Lake, New Mexico, Uranium Mill Tailings Site. July 1996.
NRC, Division of Waste Management, Washington, DC.
NRC (U.S. Nuclear Regu'atory Commissions.1996b. Review of Completion Report for Ambrosia lake Vicinity Property AM-001S, Northeast of Ambrosia Lake Site. Letter from J.J. Holonich to R. Sena, Uranium Mill Tailings Remedial Action Project Office, U.S. Department of Energy, dated November 28,1996. NRC, Office of Nuclear Material Safety and Safeguards, Division of Waste Management, Uranium Recovery Branch, Washington, DC.
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Dspartm3nt of Energy Albuquerque Operations Office
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May 26,1998
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Mr. Joseph J. Holonich, Chief Uranium Recovery Branch M'
Division of Waste Management Office of Nuclear Material Safety and Safeguards Mail Stop T7J9 U. S. Nuclear Regulatory Commission Washington, DC 20555-2738
Dear Mr. Holonich:
Enclosed for your review are four (4) copies of the Department of Energy's (DOE )
responses to Nuclear Regulatory Commission (NRC) comments, regarding Ambrosia Lake, New Mexico, Vicinity Property No. AM-001S. The NRC comments were initially discussed via teleconference on Marcy 19,1998, between Messrs. Hooks and Schmidt of your office and myself and have undergone one iteration since that date. DOE's responses were informally transmitted to Mr. Schmidt via email on April 15,1998. This transmittal represents DOE's formal response to these comments Please feel free to contact me at (505) 845-5637 if you have any questions concerning this transmittal.
Sincerely,
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i M. A. Woodworth Vicinity Property Manager Uranium Mill Tailings Remedial Action Team Environmental Restoration Division
Enclosures:
(AM-001S, NRC Comment Responses) a Pnnled on temsed paper 94 o(y wo 3 w
Mr. Joseph J. Holonich 2
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D. Gillen, NRC C. Abrams. NRC K. Hooks, NRC F. Bosiljevac, ERD, AL R. D'Arezzo, MK-F E. Artiglia, TAC K. Johnson, TAC
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'Mr. Joseph J. Holonich, Chief Vicinity Property No. AM-001S Uranium Recovery Branch UNC Property
' Division of Waste Management Northeast of Ambrosia Lake Site Office of Nuclear Material Safety Ambrosia Lake, New Mexico And Safeguards 4
Mail Stop T7J9
' U.S. Nuclear Regulatory Commission
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Washington, DC l
20555-2738 j
Dear Mr. Holonich:
Enclosed for your review and concurrence, are two revised copies of the Completion Report for Ambrosia Lake, New Mexico, Vicinity Property No. AM-OO1S per your letter (Review of Completion Report for Ambrosia Lake Vicinity Property AM-001S, Northeast of Ambrosia Lake Site) dated 28 November 1996. This revision reflects a format change to Appendix B,.
2 addition of Th data to Appendix A and some text changes in the main body of the.
document which precipitated repagination of the entire document. Also enclosed, to aid in your review are'two copies of the Review Comments Worksheet generated by the Remedial Action Contractor. This revision replaces the documents currently in your possession in their entirety.
Should you have any questions or require any additionalinformation regarding this transmission, please feel free to contact me at (505) 845-5637.
Sincerely,~'
O,.
L. A. Woodworth Vicinity Property Manager Uranium Mill Tailings Remedial Action Team Environmental Restoration Division
' Enclosures cc w/ enclosures:
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Department of Energy
!, Albuquerque Op'erations Office P.O. Bcx 5400 y
Albuquerque, New Mexico 87185-5400 SEP16 E86
. Mr. Joseph J. Holonich, Chief Vicinity Property No. AM-001 Uranium Recovery Branch Northeast of Ambrosia Lake Site Office of Nuclear Materials Safet?
Ambrosia Lake, NM And Safeguards Mail Stop T7J9 U.S. Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Holonich:
In accordance with the Uranium Mill Tailings Radiation Control Act of 1978 (Public Law 95404), the Environmental Protection Agency (EPA) Standards (40 CFR part 192), and the Memorandum of Understar. ding t;etween the U.S. Department of Energy (DOE) and the U.S.
Nuclear Regulatory Commission (NRC) (GM004 85AL26037), two copies of the Vicinity Property Completion Report for the above property are submitted for NRC certification concurrence. Please note that the application of supplemental standards does not appear in the REA. Supplemental standards were applied in the field. Also enclosed to aid in the review are the NRC Review form and a' copy of the Vicinity Property Certification Summary and Decision.
Should you have any questions,'please contact contact John Evett of my staff at (505) 845-4865.
1, Sincerely, i
Steven C. Hamp Uranium MillTailings Remedial i
f Action Team Leader Environmental Restoration Division Enclosures
\\'k '
- 1. AM-001 Completion Report (2 Copies)
- 2. NRC Review Form for Supplemental
/
- 3. Certification Summary and i I
5 Decision Form 9
t' i
cc w/o enclosures:
. J. Hams, CDPHE J. Evett, ERD
/
E. Artiglia, TAC 1
R. Johnson, TAC
'l g960916 j
Evvv WM-67
,,,,,,P DR y
L______-___
VP No.: AM-001 NRC Review Form for Supplemental Certification i
I of Vicinity Properties i
The Department of Energy (DOE) has determined that the remedial action at the following vicinity property (VP) has been completed and thereby complies with supplemental standards invoked by DOE under 40 CFR' Subpart C, specifically Subsections 192.21 and 192 22.
[}
NRC concurrence for the Radiological Engineenng Assessment (REA) given on:
i
[X ]
Supplemental standards were not in the REA, special circumstances required that supplemental standards involved during remedial action.
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Steven C. Hamp, DOE Certific6 tion Officer Date/
/
==============================
Based on the information and certification provided by the DOE, the NRC:
[]
concurs that the remedial action at the subject VP has been completea under its authonty provided by the Uranium Mill Tailings Radiation Control Act (UMTRCA).
Section 104(f)(1) and as desenbed in the Memorandum of Understanding (MOU).
Appendix A, Section 3 4.
[]
concurs, as above, except for the following conditions:
1.
2.
3
[] See attached sheets for any additional provisions
[]
needs additionalinformation to make a concurrence decision This information consists of j
3 i
1 J
[ ] See attached sheets:for any additionalinformational needs-
)
- .'t NRC Concumng Official and Title Date a
I
j j
'b'-
VICINITY PROPERTY CERTIFICATION
SUMMARY
AND DECISION - VP NO. AM-001 The data presented in the certification folder indicate:
Evaluation Yes No N/A 1.
The Ra 226 concentration in the top 15 cm of soil g
]
]
averages sSpCl/0 above background over 100 m',
in-situ O lab 4
)
i
- 2. The Ra 226 concentration in any 15 cm of soil below the
]
]
top 15 cm surface layer averages $15 pCl/g above background over 100 m', in-situ O lab O.
- 3. The indoor gamma readings are 520 R/h above
]
]
background in every habitable room.
cipera L.A ~ h - rJo.CTRu c7tAES 4.
The radon daughter concentra: lori (RDC)in any habitable
]
]
g room is <0.02 working levels, or at most 0.03 WL. O RDC levels exceed 0.03 WL due to non-tailings material.
- 5. Supplemental standards were applied in accctdance with g
]
]
EPA standards 40 CFR Part 192.21.
TAC Recommendation: O Certification, Certification pending NRC concurrence, O Hold pending l
long-term RDCs (detectors previously installed), O Request additional measurements per the RAC AC consensus fo, O Close-out.
7kl /96 he /N _) U L-TA ' valuator
//
Date
/
f 6LJalt AQzu
& ssnc I
TAC Vicinity Property Mana(er Date Comments:
- 52) ALL vE.h o =tcA rfchi Sc,t C4 e O l<=s ra s k < / Ct wt
~ ) E4 W
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d 5h ik.cMom1LE Et~r'su r tois iMAbs'* T~e r1 t v a hu n E T rft" \\/ t'
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Act cA b r & L f iffE Cht UCAY %vud ilr CE.tvr t~rtc'd ht,~b e4 NQC Y~ frJri Cc.ucu.mt.cucE.
4,,A v 0
EY>tA th 1*f tnEM C5 on CA&L r hiuWi$ Pck Dh w wh r s. 2 h : z "] VT }. 3ke. 5g
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~ TAR L C= 5'. l. $c e t CA M d c i" :A lH IS - N-r% - t 2 - I'l r % Mr SE r evG, _ k/ u/
hAQ &Ttsor IMICA'rt*C A SOIL (cNc g n%vir N c7 I h Q /Q*
c 7pc ;uc sgoveh raw,vis wue-.~ w R t e i.i. p. g c.,).'
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4 CERTIFICATION REVIEW SUM
.Y 1
h6O
, Vicinity Property No. AM-001 Date
'I
/
Reviewed by: f C/
l ODEA/LA"b
)
Address:
Property Category:
Portion of Section 28 & 33, i
N & NE of Construction Boundary _
j Ambrosia Lake, New Mexico Quantity of soil removed:i,117; %d(yd))
RA Contractor:_.M_ 2 FG6vsod The recommendation for certification is based on a review of the Completion Report and other available data describing remedial actions and resulting radiological conditions at this property.
Measurement methods and data are compared to the requirements provided in the Vicinity Properties Management and implementation Manual, and in 40 CFR 192. The following recommendations are made according to the intent of those requirements.
1.0 CERTIFICATION M
This property complies with the EPA standards and is recommended for certification.
O This property is recommended for certification only after the conditions listed in 3.0, below, are met.
O Remedial actions were refused by the property owner, and the property cannot be j
certified.
2.0 SUPPLEMENTAL STANDARDS O
Supplemental Standards were not applied at this property.
'M Supplemental Standards were applied as described in the completion report.
O The following agencies concurred in the application of Supplemental Standards at this property.
l l
3.0 CONDITIONS O
Annual average RDC results are required.
O The following additional measurements are required:
l l
M The following additional actions must kb leted:
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VICINITY PROPERTY COMPLETION REPORT
(
AT AM 00lS AMBROSIA LAKE, NM May 2,1996 i
FOR l
URANIUM MILL TAILINGS REMEDIAL ACTION ROJECT OFFICE
's ALBUQUERQUE OPERATIONS OFFICE U.S. DEPARTMENT OF ENERGY t
ALBUQUERQUE, NM BY
{
MK-FERGUSON COMPANY AND RUST FEDERAL SERVICES, INC.
'k MK Ferguson Company has been granted authorization to perform remedial action under the Uranium Mill Tailings
(
adiation Control Act of 1978, Public Law 95-604. Remedial acticn was done in accordance to the EPA Standards or Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material from inactive Uranium Processing Sites,40 CFR 192.12,192.20-2
%96092000%%960 N PDR WASTE WM-67 PDR L....
Vicinity Property No. AM@l
[
TABLE OF CONTENTS 1.0
SUMMARY
2.0 OPERATION
SUMMARY
2.1 Remedial Action Plan-2.2 Previously Unidentified Contamination
!(
2.3 Unanticipated items During Remedia! Action 3.0 VERIFICATION
SUMMARY
(
3.1 Radiological Survey Data
[
3.1.1 Pre-Remedial Action Survey 3.1.2 Pre-Restoration Survey 3.1.3 Justification for Supplemental Standards f
3.2 Recommendation for Certification
\\
{
3.2.1 Exterior a
3.2.2 Interior
.0 REFERENCES APPENDIX A - Radiological Survey Data i
APPENDIX B Supplemental Standa/ds APPENDIX C - Legal Description LIST OF FIGURES Figure l
Property Photos Property Site Plan (AMB-PS-tp-0403) 4 Certification Radiological Plan;(AMB-PS 10-0424, AMB SV 023, A2, A3, A4, AS, B1, B2, B3, B4, B5, B6, C5, C6, DS, D6, D7, ES, E6, E7, FS, F6, F7, Vought Tank, and Vought Tank Ditch)
LIST OF TABLES l
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3.1 Verification Soil Sample Survey 3.2 Borehole Data for Supplemental Standards Area 3.3 Soil Sample Survey fot Supplemental Standards Area 9
3.4 Gamma Scan of Supple' mental Standards Area i.
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Vicinity Property No. AM-001 1
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,3 (V) i 1.0 SUMM ARY i
PROPERTY NUMBER:
AM-001 j
l PROPERTY ADDRESS:
NORTHEAST OF AMBROSIA LAKE SITE AMBROSIA LAKE, NM PROPERTY OWNER:
UNITED NUCLEAR CORPORATION l
1700 LOUISIANA BLVD., SUITE 230 j
ALBUQUERQUE, NM 87110 l
PROPERTY CATEGORY:
OPEN LAND REMEDIAL ACTION CONTRACTOR:
MK-FERGUSON COMPANY CONSTRUCTION SUBCONTRACTOR:
GIBBONS AND REED
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RADIOLOGICAL CONTRACTOR:
RUST FEDERAL SERVICES i
REA APPROVED:
N/A REMEDIAL ACTION STARTliD:
JUNE 6,1993 REMEDIAL ACrlON COMPLETED:
MAY 24,1995 APPENDIX C SIGNED AUGUST 12, 1995 VOLUME OF MATERIAL REMOVED:
OUTDOOR: 1,177,806 CY INDOOR: N/A-l k
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e Vicinity Property No. AM-001 1.0
SUMMARY
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Remedial action was completed on Vicinity Property AM-001. A total of 1,177,806 cubic yards of soil was removed from the property. Radiological surveys conducted following removal of contaminated material, I
but before property restoration, demonstrate that the property, with the applications of supplemental standards, has been cleaned to EPA standards. This completion report racommends the DOE review the radiological data provided and award final cenification.
I 2.0 OPERATIONS
SUMMARY
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2.1 Remedial Actiori Plan
. The basic remedial action on this property was performed according to the Remedial Action Plan.
A total of 1,177,806 cubic yards of soil was removed from the property. An estimate of the amount of material to be removed from this property was not made since the remedial action was performed in conjunction with the Ambrosia Lake Site Remedial Action Plan. Restoration consisted of grading to promote positive drainage and seeding the re-contoured araas. In addition, th.: application of Supplemental Standards 'for the material which was left unexcavated in and around the abandoned Anne Lee Mine Shaft is appropriate.
2.2 Previously Unidentified contamination No new areas of contamination were identified during remedial action.
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Unanticipated items During Remedial Action v
The east and south boundaries for Vought tank were beyond the tank berm. The tank was remediated only to meet the berm. In areas where the boundaries didn't reach the berm remediation was extended to the berm.
3.0.
VERIFICATION
SUMMARY
3.1 Radiological Survey Data All survey data were acquired according to approved procedures.
3.1.1 Pre Remedial Action Suney De information defining the ~ contaminated area - requiring remedial action is presented in.the Remedial Action Plan and Final Desien for Stabilization of the l
. inactive Uranium Mill Tailines at Ambrosia Lake. New Mesleo: Final. ' 19E L
UMTRA DOE /AL 050516.0000.- The material is incorporated into this document by reference.
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Vicinity Property No. AM-001 h, x 3.1.2 Pre-Restoration Survey Exterior:
After removal of contamination, and prior to backfilling, a soil sample survey was conducted in the excavated area. Soil samples were aliquoted from the 13348 verification grids and analyzed by gamma spectroscopy with the opposed crystal system in accordance with Health Physics Procedure 015. The radium concentration in these soil samples ranged from 0.0 to 6.1 pCi/g, as described in Table 3.1.
AMB-PS 10-0424, Vought Tank Ditch, and Vought Tank drawings show the actual
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areas of excavation.
The resul'ts confirm that contamination has been reduced to below the EPA standards for radium m soil. Background for the Ambrosia Lake site is 1.5 pCilg Ra-226.
Interior-1 There are no structures on the property.
3.1.3 Justification for Supplemental Standards i
Application of Supplemental Standards is in accordance with 40 CFR 192.22, (ex
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a)
Risk of injury to worke'r/public L
b)
Environmental harm i
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c)
High cost relative to long term benefits d)
High cost of cleaning up building relative to benefits e)
No known remedial action f)
Radiorwelides other than Ra 226 emt Brief Condition Description and Justification:
Supplemental Standards are recommended in the area of the Anne Lee Mine Shaft due tn sa[ety concerns of working near the mine shaft and due to the extrerne cost to remove the contamination from and backfill the 600 foot deep mine shaft. The cos't to p'erform this work in a safe manner would far outweigh any long term benefits.
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I Vicinity Property No. AM-001 1
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De area is open land used for grazing. Land use in this uea is not expected to
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O, change in the future and it is unlikely that a person would spend an extended period of time in the uea. Remediation would require the excavation and proper backfilling of the,600 feet deep mine shaft. Derefore, we are recommending that the contaminated material in the Anne Lee Mine Shaft be left in place. His action is permitted under Title 40, Code of Federal Regulations, Section 192.21 and 22 subsection A and C.
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ne material left in place has radiation exposure rates ranging from 5 to 68 micro i
R/hr. If a person spent 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> a day,5 days a week, for 50 weeks in a 68 micro R/hr radiation field, he would receive about 136 millirem of gamma exposure in one year. Although this dose is over the yearly limit of 100 millirem, the example provided is a worst case scenario and ~it is not likely or expected that a member of i
the general public would spend the amount of time in the area of the Anne Lee Mine Shaft required to receive this dose.
JUSTIFICATION CHECKLIST FOR APPLICATION OF SUPPLEMENTAL STAND'ARDS Additional cost without application of Supplemental Standards = Unknown Ye+
No if Supplemental Standards are Applied:
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Open Land?
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Occupied Building?
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If yes, to No.2, is contaminated area beneath or within 10 feet of a building?
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4 Anticipated change of land use within the next 5 years?
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Is contamination in a habitable ares?
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Have owner's comments been solicited'(attach comments or record of teleconference) (See Appendix B).
E.stimated volume of contaminated material to remain = 12.500 cy Contami' ated area to remain = 19,500 sf n
Range for contaminated areas = 5 to 68 pR.hr at 3 feet above surface.
Range of Ra 226 concentration in soil in contaminated area = 0.4 to 452.8 pCi/g w
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2 Vicinity Property No. AM@i
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3.2 Recommendation for Certification
3.2.1 Exterior
One area of contamination was identified and removed.
Soil samples after excavation and prior to backfilling indicate that the limits of 5 pCi/g in the surface 15 cm. and 15 pCi/g in any 15 cm. layer below the surface are not exceeded. Based on this information, we recommend the exterior of this vicinity property, with the application of Supplemental Standards, be certified to be in compliance with EPA standuds for the UMTRA Project.
3.2.2 Interior 9ere ve no structures on the preperty.
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Vicinity Property No. AM-001 I
4.0 REFERENCES
4.1 Remedial Action Plan and Site Design for Stabilization of the Inactive Uranium Mill Tailings at Ambrosia Lake, New Mexico: Final,1987; UMTRA-DOE /AL 050516.0000.
4.2 Health Physics Procedures; Chem-Nuclear Environmental Services, Inc., for MK Ferguson Company, Remedfal Action Contractor; Albuquerque, New Mexico; June 1986.
4.3 Vicinity Properties Management and implementation Manual; UMTRAP, U.S. Department of l
Energy; Albuquerque, New Mexico; August 1986.
4.4 Title 40, Code of Federt! Regulations, Part 192.12 23; U.S. Environmental Protection Agency; i
Washington, D.C.; July 1983.
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