ML20057C015
| ML20057C015 | |
| Person / Time | |
|---|---|
| Site: | 07000371 |
| Issue date: | 09/17/1993 |
| From: | UNITED NUCLEAR CORP. (SUBS. OF UNC, INC.) |
| To: | |
| Shared Package | |
| ML20057C012 | List: |
| References | |
| NUDOCS 9309240284 | |
| Download: ML20057C015 (12) | |
Text
UNC Naval Products Additional Remediation and Survey Information Incinerator Pad Area 1.0 Introduction UNC performed remediation of the incinerator pad area at the UNC Naval Products site and reported the final survey results to the NRC in the " Final Site Decontamination Report" dated March 12,.
1993, transmitted by letter NIS-93-03-11 dated March 15, 1993.
On 5/17/93 ORISE was on site to perform final confirmatory soil I
l analyses in the incinerator pad area.
On 6/10/93 an ORISE representative informed UNC that preliminary analysis results forwarded to NRC Region I identified one sample with elevated levels of uranium.
UNC located this sample, which had been marked with a flag by ORIS E, at the top of the hillside north of i
i the incinerator pad between sample points El and F1.
Figure 1, i
which is a duplicate of Figure G-2.2.5 in the referenced report, is used for continuity to locate this elevated sample.
l 2.0 Remediation and Surveys UNC remediated the area identified by ORISE and then conducted additional gamma surveys over the two 10m X 10m grids shown in Figure 2.
One elevated reading was found approximately half way between El and E2.
That area was remediated and resampled.
One of the follow-up soil analyses was elevated at 160 pCi/ gram and is identified as " Dredging N East" (NE side due south of an old pipe in the hill used for pumping of dredging materials prior to UNC's site ownership).
As a result of finding these two identified areas with elevated uranium levels, UNC chose to conduct an additional systematic soil sampling survey within the two ten meter grids as shown in Figure 3.
Designated core sample points were selected to fall between previous corings already analyzed and showing acceptable results.
The new survey resulted in an additional 33 corings taken, each down to approximately two feet in depth.
This provided a tighter pattern, creating sample points equidistant between the original triangular grid point core sample pattern within these two 10m X 10m grids.
Page 1 9309240284 930917 PDR ADDCK 07000371 C
PDR a.
Analysis results for this work are presented in Figures 4, 5 and 6.
This data has been transferred to Figure 3.
All results were acceptable to the NRC's soil release criteria.
Figure 7 shows three soil analyses identified as ORAU East, URAU West and ORAU North.
These results represent final data following remediation of the area containing the ORAU hot spot.
Figure 7 also shows three soil analyses identified as Dredging W est, Dredging South and Dredging N East.
These results represent data following remediation of the UNC hot spot.
Additional remediation was done within the Dredging N East area and the final follow-up soil analysis data is presented in Figure 8.
Figure 9 presents final soil analyses taken from two locations, EC and GG, reported in Figure 5 and 6, respectively.
Although these locations met NRC release criteria, UNC conservatively performed additional remediation and resampling due to the high statistical uncertainty associated with the initial results.
3.0 Su rvey Findinas/Comoliance Criteria As discussed above and presented in the attached figures, the incinerator pad area now meets all applicable NRC requirements for release for unrestricted use.
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I LIST OF FIGURES Figure 1 Location of ORISE Identified Elevated Soil Sample Figure 2 Location of ORISE and UNC Identified Elevated Soil Samples Figure 3 Additional Soil Sample Locations - North of Incinerator Pad Figure 4 Results - Additional Soil Samples Figure 5 Results - Additional Soil Samples Figure 6 Results - Additional Soil Samples Figure 7 Follow-up Soil Samples - Elevated Areas Figure 8 Final Soil Analysis - Remediated ORISE Hot Spot Figure 9 Follow-up Soil Analysis - Statistical Evaluation l
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AT TOP OF HILLSIDE NORTH OF INCINERATOR PAD UNC HOTSPOT C
Figure 2 Location of ORISE & UNC Ident. Elevated Soil Samples
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"*;*"**J" Figure 3 Additional Soil Sample Locations North of Incinerator Pad
ll NUCLEAR ENVIRONMENTAL LABORATORIES R.D.1, BOX 355 VANDERGRIFT, PA.15690 f Page 2 LEVEL 1 RADIOCHEMISTRY DATA REPORT MULTIPLES SAMPLES OR MULTIPLE ANALYTES DATE: 07/30/93 l Cost Center:
220 NEL Contract No. 431 -1747 - 01 Report No.:
9307.092 Client:
UNITED NUCLEAR NAVAL PRODUCTS Client Site:
Uncasville, Ct.
Client Auth. No.:
Client Representative:
Don K. Luster No. Samples 11 COC No.:
UN 0980 Sample
Description:
Incinerator Soil Samples SDG No.:
NA Sample Weig_ht/ Volume:
NA Sample Receipt Date:
07/27/93 Analysis Date: 07/29/93 Recuested TAT:
5 DAYS Actual TAT:
3 DAYS Decayed To: NA Customer's N EL's Analytical One sigma Samole No.
Samnle No.
Method Analvte Results Units Uncertainty Units AC 27037 Gamma Spectrograchic Total Uranium 7.33 Pico Ci/ gram 3.99 Pico Ci/ gram BD 27038 Gamma Soectrograchic Total Uranium 2.16 Pico Cl/ gram 1.39 Pico Ci/ gram BE 27039 Gamma Spectrographic Total Uranium 4.69 Pico Ci/ gram 2.03 Pico Ci/ gram BF 27040 Gamma Spectrograchic Total Uranium 2.16 Pico Ci/ gram 1.34 Pico Ci/ gram CB 27041 Gamma Spectrographic Tctal Uranium 2.43 Pico Ci/ gram 1.73 Pico Ci/ gram CC 27042 Gamma Spectrograchic Tctal Uranium 5.69 Pico Ci/ gram 1.92 Pico Ci/ gram CD 27043 Gamma Spectrographic Total Uranium 5.88 Pico Ci/ gram 1.94 Pico Ci/ gram CF 27044 Gamma Spectrograchic Total Uranium 3.18 Pico Ci/ gram 1.76 Pico Ci/ gram CG 27045 Gamma Spectrographic Tctal Uranium 2.69 Pico Ci/ gram 1.83 Pico Ci/ gram DA 27046 Gamma Spectrograchic Total Uranium 5.69 Pico Ci/ gram 2.73 Pico Ci/ gram DB 27047 Gamma Spectrographic Total Uranium 5.51 Pico Ci/ gram 1.91 Pico Ci/ gram Note: Gammaspectrographic analysis. dry basis except where noted.
- = as-received Lahuatory Super _ visor l iData Reviewed / Approved by:
cO. A - Em Report DATE: 07/30/93 r_W. J. Rossy Figure 4
Results - Additional Soil Samples
lNUCLEAR ENVIRONMENTAL LABORATORIES R.D.1, BOX 35S VANDERGRIFT, PAi 15690 e
Page 2 LEVEL 1 RADIOCHEMISTRY DATA REPORT MULTIPLES SAMPLES OR MULTIPLE ANALYTES DATE: 08/02/93 l Cost Center:
220 NEL Contract No. 431 -1747-01 Report No.:
9308.003 Client:
UNITED NUCLEAR NAVAL PRODUCTS Client Site:
Uncasville, Ct.
Client Auth. No.:
Client Representative:
Don K. Luster No. Samples 11 COC No.:
UN 0981 Sample
Description:
Incinerator Soil Samples S D G N o.:
NA Sample Weight / Volume:
NA Sample Receipt Date:
07/27/93 Analysis Date: 07/30/93 Recuested TAT:
5 DAYS Actual TAT:
4 DAYS Decayed To: NA Customer's NEL's Analytical One sigma Samole No.
Samole No.
Method Analvte Resuits Units Uncertal..iv Units DD 27048 Gamma Spectrograchte Total Uranium 4.20 Pico Ci/ gram 1.60 Pico Ci/ gram DE 27049 Gamma Spt.ctrograchic Total Uranium 6.23 Pico Ci/ gram 2.11 Pico Ci/ gram DF 27050 Gamma Soectrograchic Total Uranium 2.21 Pico Ci/ gram 1.27 Pico Ci/ gram EB 27051 Gamma Spectrograchic Total Uranium 6.45 Pico Ci/ gram 1.82 Pico Ci/ gram EC 27052 Gamma Spectrograchic Tota! Uranium 13.85 Pico Ci/ gram 13.56 Pico Ci/ gram ED 27053 Gamma Spectragrachic Total Uranium 10.43 Pico Ci/ gram 8.44 Pico Ci/ gram EG 27054 Gamma Spectragrachic Total Uranium 13.64 Pico Ci/ gram 8.84 Pico Ci/ gram EF 27055 Gamma Spectrograchic Total Uranium 4.06 Pico Ci/ gram 1.82 Pico Ci/ gram FA 27056 Gamma Spectrographic Total Uranium 5.95 Pico Ci/ gram 1.22 Pico Ci/ gram FB 27057 Gamma Spectrographic Total Uranium 2.67 Pico Ci/ gram 1.25 Pico Ci/ gram FD 27058 Gamma Spectrograchic Total Uranium 6.50 Pico Ci/ gram 2.26 Pico Ci/ gram t
s Note: Gamma spectrographic analysis, dry basis except where noted.
l
- = as-received l
Data Reviewed / Approved by:
M.)-
bDc l
Report DATE: 08/02/93
{
(W. J. Joss)
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Figure 5 l
-Results - Additional Soil Samples
fNUCLEAR ENVIRONMENTAL LABORATORIES R.D.1, BOX 355 VANDERGRIFT, PA.15690 j,.
Page 2 LEVEL 1 RADIOCHEMISTRY DATA REPORT MULTIPLES SAMPLES OR MULTIPLE ANALYTES DATE: 08/02/93 l Cost Center:
220 NEL Contract No. 431 -1747-01 Report No.:
9308.004 Client:
UNTTED NUCLEAR NAVAL PRODUCTS Client Site:
Uncasville, Ct.
Client Auth. No.:
Client Representative:
Don K. Luster No. Samples 11 COC No.:
UN 0982 Sample
Description:
incinerator Soil Samples SDG No.:
NA Sample Weight / Volume:
NA Sample Receipt Date:
07/27/93 Analysis Date: 08/02/93 Reouested TAT:
5 DAYS Actual TAT:
5 DAYS Decayed To: NA
,s Customer's N EL's Analytical One sigma
~ '
Samole No.
Samole No.
Method Analvte Results Units Uncertainty Units FE 27059 Gamma Spectrograchic Total Uranium 3.17 Pico Cl/ gram 1.54 Pico Ci/ gram FF,EF 27060 Gamma Spectrograchic Total Uranium 6.48 Pico Ci/ gram 2.17 Pico Ci/ gram GB 27061 Gamma Spectrograchic Total Uranium 1.96 Pico Ci/ gram 0.70 Pico Ci/ gram GC 27062 Gamma Spectrographic Tctn! Uranium 8.46 Pico Ci/ gram 2.52 Pico Ci/ gram GD 27063 Gamma Spectrograchic Totaj Uranium 11.49 Pico Ci/ gram 9.28 Pico Ci/ gram GF 27064 Gamma Spectrograchic Total Uranium 9.33 Pico Ci/ gram 5.71 Pico Ci/ gram GG 27065 Gamma Spectrograchic Total Uranium 22.12 Pico Ci/ gram 8.63 Pico Ci/ gram HB 27066 Gamma Spectrographic Tctal Uranium 2.41 Pico Ci/ gram 0.60 Pico Ci/ gram HD 27067 Gamma Spectrograchic Total Uraniurr.
1 2.41 Pico Ci/ gram 9.56 Pico Ci/ gram HE 27068 Gamma Spectrograchic Total Uranium 4.55 Pico Ci/ gram 1.62 Pico Ci/ gram HF 27069 Gamma Spectrographic Total Uranium 5.07 Pico Ci/ gram 1.89 Pico Ci/ gram Ncte: Gamma spectrographic analysis, dry basis except where noted.
- = as-received Data Reviewed / Approved by: '
Gd S'0 l
Report DATE: 08/02/93 o
I (W. J...Ross)
La bora to rL$upe rvjsor' Figure 6 Results - Additional Soil Samples
hNUCLEAR ENVIRONMENTAL LABORATORIES R.D.1, BOX 355 VANDERGRIFT, PA 1569'O l a
LEVEL 1 RADIOCHEMISTRY DATA REPORT MULTIPLES SAMPLES OR MULTIPLE ANALYTES Date: 07/08/93 l Cost Center:
220 NEL Contract No. 431 -1747-01 Report No.:
9307.016 Client:
UNC Naval Products Client Site:
Uncasville, CT.
Client Auth. No.: NA" Client Representative:
D. Luster No. Samples 10 LAB REO:
UN 0920 Sample
Description:
Soil Samoles SDG No.:
NA Sample Weight / Volume:
NA Sample Receipt Date:
07/02/93 Analysis Date: 07/07/93 Recuested TAT:
5 DAYS Actual TAT:
2 DAY Decaved To: NA s
Customer's N EL's Analytical One sigma Samole No.
Sample No.
Method Analvte Results Units Uncertainty Units ORAU EAST 26518 Gamma Spectrograph:c Total Uranium 9.96 Pico Ci/ gram 4.18 Pico Ci/ gram CRAU WEST 26519 Gamma Spectrograchic Total Uranium 2.41 Pico Ci/ gram 0.55 Pico Ci/ gram ORAU NORTH 26520 Gamma Spectrograchic Total Uranium 8.44 Pico Ci/ gram 1.55 Pico Cl/ gram DREDGING WEST 26521 Gamma Spectrograchte Total Uranium 7.09 Pico Ci/ gram 2.82 Pico Ci/ gram DREDGING SOUTH 26522 Gamma Spectrograchic Total Uranium 9.01 Pico Ci/ gram 3.64 Pico Ci/ gram DREDGING N EAST 26523 Gamma Spectrographic Total Uranium 160.40 Pico Ci/ gram 8.23 Pico Ci/ gram Note: Gamma spectrographic analysis results, dry weight basis l
Data Reviewed / Approved by:
(A ) - ',, - N%
l Report Date: 07/08/93 I nbntnenne suncrvknr.
(w. J. nose Figure 7 Follow-up Soil Samples - Elevated Areas
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NUCLEAR ENVIRONMENTAL LABORATORIES R.D.1, BOX 355 VANDERGRIFT, PA.15690 h a
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Page 2 LEVEL 1 RADIOCHEMISTRY DATA REPORT MULTIPLES SAMPLES OR MULTIPLE ANALYTES DATE: 08/24/93 l Cost Center:
220 NEL Contract No. 431 -1747- 01 Report No.:
9308.065 Client:
UNITED NUCLEAR NAVAL PRODUCTS Client Site:
Uncasville, Ct.
Client Auth. No.:
Client Representative:
Don K. Luster No. Samples 2
COC No.:
UN 0999 Sample
Description:
Incinerator Soil Samples SDG No.:
NA Sample Weight / Volume:
NA Sample Receipt Date:
08/18/93 Analysis Date: 08/24/93 Reouested TAT:
5 DAYS Actual TAT:
4 DAYS Decaved To: NA Customer's N EL's Analytical One sigma Samole No.
Samole No.
Method Analvte Results Units Uncertainty Units EC 27595 Gamma Soectrographic Total Uranium 3.30 Pico Ci/ gram 0.73 Pico Ci/ gram' GG 27596 Gamma Soectrograchic Total Uranium 8.27 Pico Ci/ gram 5.56 Pico Cilgtam Ncte:
Gamma spectrographic analysis, dry basis except where noted.
- = as-received l
Report DATE: 08/24/93 h
'j Data Reviewed / Approved by:
dd C--~ :,
(W. J._Ross) t4 gator _y Supenisor-Figure 9 Follow-up Soil Analysis - Statistical Evaluation
.