ML061770593

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State of Vermont, Environmental Radiation Surveillance Report, 2005 Summary. Vermont Department of Health Office of Radiological Health
ML061770593
Person / Time
Site: Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date: 04/10/2006
From:
State of VT, Dept of Health
To:
Office of Nuclear Reactor Regulation
References
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Download: ML061770593 (100)
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Text

State of VE~RMO~Y4KEE NUCLEAR K

POWERI STA TION Environmental Radiation Surveillan ce Report 2005 Summary

'Vermont Department of Health Office of RadiologicaI Health I.

M

/

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VERMONT Department of Health Agency of Human Services Division of Health Protection

[phone]

862-865-7730 Radiological Health IMax]

802-865-7745 io8 Cherry Street - PO Box 70 Burlington, VT 05402-0070 healthvermont.gov Executive Summary April 10, 2006 This Vermont Yankee Nuclear Power Station (VYNPS) Environmental Radiation Surveillance Report 2005 Summary is the most recent such report compiled annually by the Vermont Department of Health (VDH) since 1971. Over these years the annual report has expanded from a relatively small number of surveillances to today where the VDH reports on more than 600 samples and nearly 1,500 measurements.

Environmental surveillance is important. This report profiles the radiological conditions around VYNPS using samples and measurements in the communitiei surrounding the station. In reviewing the data tabulated here, you will find comparisons of some 2005 results.to long-term historical trends. Generally, these comparisons show no significant adverse impact of VYNPS operations. You may also find results that are compared to background levels. Background levels, in this case, are the levels of radioactivity in the air, water and earthen materials not attributable to VYNPS. Measurements above background generally may be attributed to the station, other uses of radioactivity in the measurement area, and changing meteorological conditions. The report also includes maps that show the locations where samples are collected and/or measurements are made.

Some samples and measurements are being collected or made continuously. Other samples are taken periodically.

You will find the results of all of these samples and measurements in this report. They include:

The direct gamma radiation emanations as measured continuously at dozens of thermoluminescent dosimeter (TLD) sites.

0 The amount of radioactive particulates and radioactive iodine that may be found in the air as collected with numerous continuous air samplers.

Water from wells and waterways surrounding the plant which are sampled every month, as is milk

' from local dairy farms, which are analyzed at the VDH Laboratory to determine the amount of natural and man-made radioactivity within them.

Various wild and cultivated vegetation, river bed sediments, and soils which are sampled at least annually, and analyzed at the laboratory for man-made and naturally occurring radioactivity.

The results of environmental surveillance help us verify that the VYNPS is operating in compliance with VDH Regulations which are designed to protect the health and safety of Vermonters. Should any measurements indicate a lack of compliance, the station is notified, and an investigation is undertaken to determine if the measurements are accurate, and, if so, the remedial actions to take to prevent recurrence.

There are no significant adverse health effects from the operation of VYNPS tO Vermonters for the year 2005. The sampling and measurements reported here are sometimes complex, and we invite all who read this report to contact the Radiological Health staff at the VDH to help answer any questions they may have.

ENVIRONMENTAL RADIATION SURVEILLANCE

SUMMARY

FOR 2005 ALL SAMPLES FOR THE YEAR 2005 ARE WITHIN THE EXPECTED HISTORICAL RANGE Sample' Historical

.2005 Media Range Air Filter Gross Alpha

<LLD to 0.0071 0.0009 to 0.0049 (pCi/m3) ss...

Gross Beta,

<LLD to 0.0251 0.0036 to 0.0238 Biota

. Plant Cesium-137.

<LLD

.<LLD (pCi/kg)

Potassium-40t')

2,000 to 13,000 3,060 to 20,4001.)

Beryllium-7Vl)

<LLD to 1,500

< LLD to 2,5601-'

Fungi Cesium-137 50 to 9,000 6,130 Potassium-40°'

1,000 to 12,000 7,110 Beryllium-7(')

< LLD

< LLD Cesium-134(2)

< LLD to 45

< LLD Femr Cesium-137

< LLD to 540

< LLD Potassium-40W) 4,000 to 11,000 5,270 Beryllium-7(')

100 to 4,000

'518 Honey Cesium-137

<LLD to 200 NS Potassium-400')

300 to 2,000.

NS Beryllium-7(')

< LLD NS

Sample Historical 2005 Media Range Fish Cesium-137

<LLD to 100

< LLD (pCi/kg)

Potassium-40W 1,000 to 5,000.

1,960 to 2,290 Iodine Cartridges Iodine-131

< LLD

< LLD (pCi/M3)

Milk Iodine-131

< LLD.

< LLD (pC i/L)

Potassium-40"l) 1,200 to 2,000.

1,350 to 1,690 Sediment Cesium-137

<LLD to 500-

<LLD to 83.6 jCi/kg)

Potassium-40')

6,000 to 22,000 8,290 to 14,500 Beryllium-7(')

< LLD to 5,000

< LLD Soil Cesium-137

< LLD to 500

<LLD to 1,780.

(pC i/kg)"...

(j'i"ki.

Potassium-40W 7,000 to 20,000 604 to 19,800

  • Beryllium-7(i)

< LLD to 600

"<LLD to 660 Special Study Beryllium-7.('

< LLD to 3,000

< LLD to 947 Sediments

  • .(pCi/kg).

Cobalt-60

< LLD to 2500

<LLD to 3351 Potassium-40('*

6,000 to 26,000 12,000 to 24,900 Cesium-137

<LLD to 500 97.4 to 241 TLD Gross Gamma 0 to 12.5 0 to 4.5 (mR/quarter)-

< LLD

< LLD (nCi/L) "__

Sample Historical 2005 Media.

Range Water Alpha

< LLD to 15

< LLD to 8.4

( p C )

Beta

< LLD to 15

< LLD to 5.8 Quarterly Air Beryllium-7t" *

< LLD to 0.21 0.0991 to 0.1945 Composite

( ih 3)

LLD = Lower Limit of Detection NS =No Sample

(' Naturally occurring radionuclide (2) Due to Chemobyl event.,

(3) Higher value due to differences in archival atmospheric testing deposition

AIR SAMPLES 2005 All air samples for the Year 2005 are within the expected historical range.

The historical range for alpha is from less than the detection limit to 0.0071 pCi/m3. The samples for 2005 range from 0.0009 to 0.0049 pCi/m3.

The historical range for beta is from less than the detection limit to 0.0251 pCi/in 3. The samples for 2005 range from 0.0036 to 0.0238 pCi/m3.

Air samples are taken at various fixed locations using a line powered piston type compressor,'operating at a rate of 1 cubic foot per minute nominal. The sample is collected on a fiberglass 2" diameter filter. Collection time is continuous with a nominal sampling period of four weeks.

The air filters are analyzed, for gross alpha and gross beta using an alpha/beta proportional counter. Results are reported in picocuries per cubic meter of air with 2 sigma (standard deviation) value.

(picocuries/cubic meter)

,jt db*r Siinpleeri6 ifi~dhani.CouimtyCour

~

Brt nSfiite Police 1/10 -2/15/05 0.0040 + 0.0010 0.0176 + 0.0016 0.0026 + 0.0007 0.0154+0.0013 2/15 - 3/30/05, 0.0023 + 0.0007 0.0116.h 0.0012 0.0029 + 0.0006 0.0111 + 0.0010 3/30 -4/13/05 0.0020 + 0.0012 0.0127 + 0.0024 0.0012 + 00008

.0.0100 A 0.0019 4/13 - 5/25/05 0.0016 + 0.0006 0.0094 + 0.0011 0.0016 + 0.0005 0.0074 + 0.0009 5/25 - 6/17/05 0.0020+ 0.0010 0.0122 + 0.0017 0.0024 + 0.0009 0.0103 + 0.0014 6/17-7/13/05 0.0032 + 0.0010 0.0144_+ 0.0017 0.0029 + 0.0009 0.0114+ 0.0014 7/13 - 8/17/05,,.

0.0036 + 0.0009 0.0210 +/- 0.0017 0.0035 + 0.0008 0.0165 + 0.0014 8/17 -9/12/05 0.0028 + 0.0007 0.0151 + 0.0018 0.0020 +.0.0006 0.0116 + 0.0010 9/12 - 10/11/05 0.0039 + 0.00120) 0.0238 + 0.0021")

0.0028 + 0;0008.

0.0134 + 0.0013 10/11 - 11/17/05 0.0031 +0.0009(z) 0.0156 + 0.001511)

. 0.0017+0.0007 A

.0.0110+0.0013 11/17 - 12/20/05 0.0025 + 0.0007.

0.0157 + 0.0013 0.0027 + 0.0006 0.0157 + 0.0012

) Air meter broke during this time interval and was replaced on 11/17/2005. Calculatio In used 30 liters per minute of air from 9/12/2005 to 10/11/2005.

(.2) Air meter broke during this time interval and was replaced on 11/17/2005. Calculation used 30 liters per minute of air from 10/11/2005 to 11/17/2005.

AIR SAMPLES 2005 (picocuries/cubic meter)

S plPeid Gufrdown-a emo Hen B

tA" Alpha"___

I__

"':ta.

1/10 - 2/15/05 0.0049 :- 0.0010 0.0193 -0.0016 0.0027 +/- 0.0007 0.0153 h 0.0012 2/15 -3/30/05 0.0031 0.0007 0.0127h -0.0012

.0.0021 +/- 0.0006 0.0115 +/- 0.0010 3/30- 4/13/05 0.0023 0.0012 0.0101 0.0021 0.0025 +/- 0.0011 0.0091 +/- 0.0018 4/13 - 5/25/05 0.0021 - 0.0006 0.0086 - 0.0010 0.0022 h 0.0006 0.0067 1 0.0008

-5/25 - 6/17/05 0.0022 + 0.0009 0.0090 + 0.0014 0.0010 + 0.0007 0.0076 + 0.0013 6/17 - 7/13/05, 0.0019 +/- 0.0008, 0.0123 +/- 0.0015 0.0021 + 0.0008.

0.0109 + 0.0013 7/13.- 8/17/05, 0.0027 + 0.0008 0.0141 +/- 0.0014 0.0026 +/- 0.0008 0.0144 10.0013 8/17 - 9/12/05 0.0024 + 0.0006 0.0145 + 0.0017 0.0017 + 0.0005 0.0089 + 0.0013 9/12 - 10/11/05.

0.0038 + 0.0010, 0.0196 + 0.0018 0.0026 + 0.0008 0.0178 + 0.0016 10/11 - 11/17/05 0.0030 + 0.0009-.

0.0144 + 0.0015 0.0023 + 0.0007 0.0130 + 0.0013 11/17 - 12/20/05 0.0033 + 0.0008, 0.0198 + 0.0014 0.0030 + 0.0006 0.0145 + 0.0011

AIR SAMPLES 2005 (picocuries/cubic meter) roSample Period Power LieRiver.,C rosisgi,-,

,RenaudzBrothers(Puffers),,,

1/10-2/15/05 0.0041 -0.0009 0.0182 +/- 0.0014 0.0034 + 0.0008 0.0159 + 0.0013 2/15 - 3/30/05 0.0030 +/- 0.0007 0.0119 +/- 0.0011 0.0025 + 0.0006 0.0115 +/- 0.0011 3/30- 4/13/05 0.0019 +/- 0.0010 0.0107 +/- 0.0020 i 0.0029 +/- 0.0012 0.0101 + 0.0020 4/13 - 5/25/05 0.0025 + 0.0006 0.0095 + 0.0010 0.0023 + 0.0006 0.0081 + 0.0009 5/25 - 6/17/05 0.0016 +/- 0.0008 0.0099 +/- 0.0014 0.0018 + 0.0008 0.0096 + 0.0014 6/17-7/13/05.,

0.0022 +/- 0.0008 0.0119 +/- 0.0014 0.0016 + 0.0007 0.0086+0.0012 7/13 - 8/17/05

.0.0035 + 0.0009 0.0178 +/- 0.0015 0.0032 + 0.0008 0.0162 +/- 0.0014

- 8/17 - 9/12/05 0.0022 + 0.0006 0.0144 + 0.0017 0.0017+0.0005 0.0134+0.0015 9/12 -10/11/05

-0.0031 + 0.0009 0.0201 + 0.0018'

.0.0026 + 0.0008 0.0151 + 0.0015 10/11 - 11/17/05

.0.0031.+ 0.0008 0.0136 + 0.0014 0.0030 + 0.0008 0.0118 + 0.0012 11/17 - 12/20/05

.0.0028 + 0.0007 0.0156 + 0.0012 0.0022+0.0006 0.0132 + 0.0011

AIR SAMPLES 2005 (picocuries/cubic Meter)

(3) Filter was seated improperly in the holder.

AIR SAMPLES 2005 (picocuries/cubic meter)

.SamplePeoer P

c

,ston StateHig hway, ara e, 1/10 -2/15/05 0.0024 +/- 0.0006 0.0144 +/- 0.0012 2/15 - 3/30/05 0.0023 +/- 0.0006 0.0109 +/- 0.0010 3/30 - 4/13/05 0.0026 +/- 0.0012 0.0098 b 0.0020 4/13-5/25/05 0.0020 h 0.0006 0.0074 +/- 0.0009 5/25 - 6/17/05 0.0016 +/- 0.0008 0.0089+/- 0.0014 6/17 - 7/13/05 0.0028 1 0.0009 0.0117 L 0.0014 7/13 -,8/17/05 0.0031 +/- 0.0008

.0.0173 +/- 0.0015 8/17 -9/12/05 0.0019 + 0.0006 0.0135 + 0.0016' 9/12 - 10/11/05 0.0033 + 0.0010

'0.0203 + 0.0017 10/11 - 11/17/05 0.0022 + 0.0007 0.0130 + 0.0013.

11/17 -- 12/20/05 0.0027 + 0.0006 0.0154 + 0.0012

AIR SAMPLES - ALPHA 0.006 u 0.005 n nAA J

J.-

0.003 0.002 0.001 I -Wlndham County Court

- B rafttI eb o ro St at e Police DATE Guilford Town Garage

AIR SAMPLES - ALPHA 0.006 0.005 0.004 0.00 0.002 0.001 00 DATE

AIR SAMPLES = BETA U0.

0

--Windham County Court

--Brattleboro State Police DATE Guilford Town Garage

AIR SAMPLES.-- BETA S0.02.

Sit c

ro IT...

71 II I

AIR SAMPLES - BETA 0.04 0.03 C',

0.02 0.01 0

DATE

Renaud Brothers

-W--Wilmington State Highway Garage

AIR SAMPLES - BETA 0.04 0.03 0.02 0.01

/

DATE Vernon Elementary School

-*-Dummerston State Highway Garage

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QUARTERLY AIR COMPOSITE 2005 The quarterly air composites for the Year 2005 are within the expected historical range.

The historical range for quarterly air cofmiposites(since 2003) for Be-7 is 0.08 to'0.21 pCi/n 3.

Monthly air filters from all air sampling siations were composited for the periods January through March, April through June, July through September, and October through December'..Radiochemical analyses were decay corrected tothe middle of the composite'period, i.e. February j15, May 15; August 16, itnd November 16. Usual spectra include primordial radionuclides (such as potassium-40),Iarchival'cesium-137

.and occasional cosmogenic beryllium-7. Reporting units are picocuries per cubic meter (pCi/m3) with 2 sigma (standard deviation) value.,

April toJune2005

<LLD

<LLD 0.1451+0.0113 JaJuly to Setember 2005

<LLD, LLD 0.1640 + 0.0115 October to December 2005

< LLD

< LLD 0.0991 + 0.0078

-.}

(')Archival atmospheric testing (2) Terrestrial radioactivity (3) Cosmogenic LLD = Lower Limit of Detection

BIOTA 2005 All biota samples for the Year 2005 are within the expected historical range.

The historical ranges for plant material:

Cesium-137 (1) is less than the detection limit, Potassium-40 (2) is from 2,000 to 13,000 pCi/kg, Beryllium-773 ) is from 1ess than the detection limit to 1,500 pCi/kg.

The plant sample for 2005 lies ithin these historical ranges. See table below.

The historical ranges for fungi:

Cesium-137 is 50 to 9,000 pCi/kg, Potassium-40 is from 1,000,to 12,000 pCi/kg, Beryllium:7 is less thanithe detection limit, Cesiim-134 (4) is firom less than the detection limit to 45 pCi/kg.

The fungi sample for 2005 lies within ihes6 hisiorical ranges. See table below.

The historical ranges for ferns:

Cesium-137 is from less than the detection limit to 540 pCi/kg, Potassium-40 is from 4,000 to 1.1,000 pCi/kg, Beryllium-7 is from 100 to 4,000 pCi/kg.

There fern sample for 2005 lies-within these historical ranges. See table below.

Occasional sampling,. most often once a-year, is done on forage or wild foods as available or needed. -Samples are collected (usually in the northwest quadrant) within a mile or two from the facility. These normally consist of ferns (fiddleheads), edible fungi (Clavaria sp., Boleti sp.,

Russlae sp., grapes, etc.) and grass'.' Sample sizes range from 250 to 1,000 grams. The samples are weighed, placed wet in re-entrant beakers and analyzed in the Gamma Spectrometer System using a reverse germanium detector. Usual spectra include primordial radionuclides, archival cesium-137 and occasional csiosmgenic beryllium-7. Reporting units are picocuries per kilogram with 2 sigma (standard deviation) value.

BIOTA 2005 (picocuries/kilogram)

Vernon - Rte 142 Indian Summer (June)

Grass

< LLD 5950 + 680

<LLD Point Park Vernon Rte 142 Indian Fall (October)-..

Fungi 6130+320.

7110+890

<LLD Point Park Vernon - Power Line River Spring (May)

Fern,

<LLD 5270+ 570, 518+ 349.

Crossing Vernon - North of Vernon Summer (June)

Grass

< LLD 4770 + 450 "

390 + 144 Elementary School Vernon - Miller Farm, Spring (May)

Grass

< LLD 7530 + 540

< LLD Outside Milking Parlor Vernon - Miller Farm Summer (July)

Grass(5

< LLD 20400 + 1200 2560 + 430 Outside Milking Parlor Vernon-North Side of Spring (May)

Grass

< LLD 6670 + 590

<LLD

-Blodgett Road Vernon-Small Parking Lot Summer (July)

Grass (4)

< LLD 6570 + 560 2270 + 330

.on Governor Hunt Road South of Vernon Power Dam Beach Vernon-Vermont Yankee Fall Corn

< LLD 3060 +320 689+ 143 North Fence (September)

Vernon -Vermont Yankee Fall_.

Alfalfa

< LLD 8620+ 690 558+ 139 North Fence.

(September).

Wilmington. State Highway Fall Sedge/Grass

< LLD 7320 + 670

< LLD Garage (September)

Shelburne - Background Fall Corn

< LLD 3550 + 300 436 + 121 (September)

BIOTA 2005 Samples were also evaluated for the radionuclides listed'below. None were present in excess of the lower limits of detection.

RAidi 6nucid iS'i LLD Ii R

fdinikicid'e, j LLD Chromium-51 69 Antimony-126 18

'18 Cesium-137 5

Strontium-85 86

" Cerium-139 93 Ruthenium/Rhenium-103 32 Cerium-141 98 Antimony-124:

18 Cerium-144 98

(')Archival atmospheric testing (2)Terrestrial radioactivity (3)Cosmogenic (4)Chemoby_

(5)Concentrations are higher than the historical range, but are naturally occurring radionuclides.

LLD= Lower Limit of Detection

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FISH 2005 All fish samples for the Year 2005 are within the expected historical range.

The historical range for cesium-137 () is from less than the detection limit to 100 pCi/kg. The samples for 2005 are less than the detection limit.

The historical range for potassium-40 (2) is from 1,000 to 5,000 pCi/kg. The samples for 2005 range from 1,960 to 2,290 pCi/kg.

Two locations (3-4 Vernon Pond and 3-8 Route 9 Highway bridge) provide fish samples in the spring and fall of about one.kilogram for each sample. Fish are captured via an electroshock method. The fish are frozen whole, weighed, and chopped or blended (entire) for loading into a re-entrant beaker. It is subsequently analyzed with a gamma spectrometer system using a reverse, germanium detector.

Radionuclides detected usually include naturally occurring potassium-40, thorium and uranium with daughters, archival cesium-137 due to former open atmospheric nuclear tests, and occasional traces of cosmogenic beryllium-7. Reporting units are picocuries per kilogram with 2 sigma (standard deviation) value.

Spring.

(picocuries/kilogram)

Fall (picocuries/ki.logram)

FISH 2005 Samples were also evaluated for the radionuclides listed below. None were present in excess of the lower limits of detection (LLD) which are shown in pCi/kg.

~~~~d Rainide 2

> LD,&:

R diii 2 VLLD

~

Chromium-51

69.

Antimony-126 18:

Manganese-54 15 Iodine-131 27 Cobalt-56

"_15:.:

Cesium-134

-58.

Cobalt-60 21 Cesium-136 18 Zinc-65 18 Cesium-137 5

Strontium-85.

86 C erium-39 93 Ruthenium/Rhenium-103 32 Cerium-141 98 Antimony-124 18 Cerium-144 98 (1) Aichival atmospheric testing Terrestrial radioactivity "LLD - Lower Limit of Detection,

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IODINE CARTRIDGES 2005 All iodine cartridges for the Year 2005 are within the expected historical range.

The historical range for iodine-131 in air cartridges is less than the detection limit. The samples for 2005 were less than the detection limit.

Air samples are taken at Various fixed locations using a line powered piston type compressor operating at a rate of 1 cubic foot per minute nominal. The sample is collected on a charcoal cartridge loaded with TEDA (triethylenediamine) for iodine collection. The charcoal cartridge follows the filtration of air by a glass fiber filter in the air sampling train at.all air sampling stations. Collection time is continuous with a nominal sampling period of four weeks. Response to the Chernobyl iodine release was marked in 1986, proving the sensitivity to environmental trace levels of iodine of this system. The air cartridges are analyzed for iodine-131 with the gamma spectrometer system using a reverse germanium detector. The nominal lower limit of detection is 2 x 10-2 picocuries per cubic meter of air.

IODINE CARTRIDGES 2005

IODINE CARTRIDGES 2005 LLD = Lower Limit of Detection

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MILK 2005 All milk samples for the Year 2005 are within the expected historical range.

The historical range for iodine-131 is less than the detection limit. The samples for 2005 are all less than the detection limit.

.The histoical range for potassium-40(

is from 1,200 to 2,000 pCi/L. The samples for 2005 range from 1,350 to 1,690 pCifL.

Milk sampling is performed at a frequency of once per month. The samples are measured; placed into reentrant beakers and analyzed in the gamma spectrometer system using a reverse germanium detector.

.*Usual spectra include terrestrial. potassium-40. The nominal detection limit for. iodine-131 is 10 picoCuries/liter. Significant indications'of the presence of any other radionuclides are investigated and reported if found:. Reporting units'are picocuries per liter with 2 sigma (standard deviation) value.

Blodgett Farm (picocuries/liter)

C5SI

.PeMd Ilo'dmef&31: dPidt~siiim-e40 January

< LLD 1650+130 February

<LLD 1-.,490+130 March

< LLD 1520+120 April.

< LLD 1360+ 100 May

<LLD 1520+ 120 June

< LLD

.1430 + 110 July

< LLD 1580+120

  • August

< LLD 1550+ 100 September

< LLD 1560+ 120

-October

< LLD 1610+120

-November

< LLD 1530 + 120 December

< LLD

-1520 + 100 I,...-

MILK 2005 Miller Farm (picocuries/liter)

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a....

0,.

January

< LLD 1450 + 120 February

< LLD 1350+120 March

< LLD 1580+ 130 April

< LLD 1450+110 May

< LLD 1440+120 June

<LLD.

1500+100 July

< LLD 1360+90 August

< LLD 1460+ 120 September

< LLD 1600 + 120 October

< LLD 1470 + 100 November

.<LLD -

1690+ 120 December

< LLD 1510+ 100

(')Terrestrial Radioactivity.

LLD = Lower Limit of Detection

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NORTH STORM DRAIN SEDIMENTS 2005 All north storm drain sediment samples for the Year 2005 are within the expected historical range.

The historical range for beryllium-7 (1) is from less than the detection limit to 3,000 pCi/kg. The samples for 2005 range from less than the detection limit to 947 pCi/kg.

The historical range for cobalt-60 (2) is from less than the detection limit to 2,500 pCi/kg. The samples for 2005 range from less than the detection limit to 335 pCi/kg.

The historical range for potassium-40 (3) is from 6,000 to 26,000 pCi/kg. The samples for 2005 range from 12,200 to 24,900 pCi/kg.

The historical range for cesium-137 (4) is from less than the detection limit to 500 pCi/kg. The samples for 2005 ranged from 97.4 to 241 pCi/kg.

Sediment samples from the north storm drain are taken biannually in the spring and fall. A sediment sample is taken ranging from approximately 0.75 to 1.25 kilograms from the Connecticut River at up to 40 separate locations in a grid around the discharge structure. The sample is dried, weighed on a top loaded balance and placed in a 500 milliliter HDPE (high density polyethylene) bottle. The sample is counted on the gamma spectrometer system using a reverse germanium detector. A normal spectrum will include primordial radionuclides with daughters, and archival cesium-137 from former open atmospheric nuclear testing. On occasion short-lived cosmogenic beryllium-7 and cobalt-60 can be discerned. Reporting units are picocuries per kilogram with 2 sigma (standard deviation) value.

NORTH STORM DRAIN SEDIMENTS 2005 SPRING 2005 S. :.

.~....

-. *(picocurie/kilogram)

S-1

.<LLD

<LLD 20200+1300 165+34

,..S-2 LLD

<LLD

'24900+1500-

.241.+57 S-3 S-4 T-1

< LLD

< LLD 16400+ 1000 153+51 T-2

<LLD 335+39 17800+1100 150_+33

'T-3:

_<L

.<LLD 16400+1100 149_+41 T-4 T-5 U-1

<LLD

<LLD 17100+1200 129_+50 U-2

<LLD'

<LLD 22200_+1300-' ""172+42, U-3

<LLD

<LLD, 19600-+1300

-.144+53 U-4

<LLD

<LLD.

18000+ 1200 117+371 U-5 V-1 V-2 V-3*

V-4

< LLD

< LLD 18300+ 1200 180+41 V-5

<LLD

<LLD 16000+ 1100 126+43.

W-1 W-2 W-3 W-4.

< LLD.

< LLD 16100+ 1000 120 +28 W-5

<LLD

<LLD 17600-+1100 122+31.

X-1 X-2 X-3 X-4 X-5 Y-1 Y-2 Y-3 Y-4*

Y-5*

Z-1 Z-2 Z-3 Z-4 Z-5

NORTH STORM DRAIN SEDIMENTS 2005 FALL 2005 (picocurie/kilogram) iocation I

7

~Beiw1hum-7 J C6bil Potaissiim-40. i~Cesium437 x~

S-1

<LLD

< LLD

'18000 +1100 108 +46 S-2

< LLD

< LLD 19400+ 1200 169+30 S-3 S-4 S-5 T-1

< LLD

< LLD

-12200 + 700 97.4 +23.0 T-2 947+252

< LLD 12200 +800 114+27 T-3

< LLD

< LLD 18900+ 1200 147+35 T-4 T-5 U-1

< LLD

< LLD 18000 +1200 107+43 U-2

<LLD

<LLD 1,8300+ 1100 127+42 U-3

<LLD

<LLD 18900_+1100 159+33 U-4

< LLD

< LLD 16600+ 1000 102+34 U-5 V-1 V-2 V-3

< LLD

< LLD 17500 +1600 111+28 V-4

<LLD

<LLD 18800+1100 129+31 V-5

<LLD

<LLD 15100+1000 99.7+37.4 W-1 W-2 W-3 W-4

< LLD

< LLD 17800 +1700

.157+42 W-5

< LLD

< LLD 16200+ 1000 93.6+24.5 X-1 X-2*

X-3 X-4 X-5

< LLD

< LLD 16400 +1000 112+32 Y-1 Y-2 Y-*

Y-*

Y-5 Z-1 Z-2 Z-3 Z-4*

Z-5

NORTH STORM DRAIN SEDIMENTS 2005 Samples were also evaluated for the radionuclides listed below. None were present in excess of the lower limits of detectability which are shown in pCi/kg.

Chromium-51 69 Antimony-126 18 Manganese-54 15 Iodine-131 27,,,

Cobalt-56

,15 Cesium-134 58.

Cobalt-60 21 Cesium-136 18.

Zinc-65

.18 Cesium-137 5

Strontium-85 86 Cerium-139 93:

Ruthenium/Rhenium-103

`32 Cerium-141 98 Antimony-124 18 Cerium-144.

98

  • Location not included for sampling

()Cosmogenic (2) Hot particles from Vermont Yankee Nuclear Power Plant (3) Terrestrial radioactivity (4) Archival atmospheric testing LLD

= Lower Limit of Detection

APPENDIX.

A RADIOLOGICAL SAMPLING PROGRAM OF. BOTTOM SEDIMENT NORTH STORM DRAIN S

T U

V w

X y

+

+OBuoy 75 ft.

from shore Channel 40e+4 _

+

+

+

+

+

÷-

3+

0

+

+

++

/

+

+

+

+

+

+

+

+

I 20 ft.

+

I *

+

.+

+

~

~.

3

%~*.~q

~

  • .3 I ~

I C-

~

  • ~

~

      • C C

9' C

C

  • C 4

C C

  • ~

C 6

C.

CC C

CCC

,6

'.0.0.0 North Storm Drain

SEDIMENT 2005 All sediment samples for the Year 2005 are within the expected historical range.

The historical range for cesium-i37 1

is from less than the detection limiitto 500 pCi/kg. The samples for 2005 range from less than the detection limit to 83.6 pCi/kg.

The historical range for potassium-40 (2) is from 6,000 to 22,000 pCi/kg. The samples for 2005 range from 8,290 to 14,500 pCi/kg.

The historical range for beryllium-7 (3) is from less than the detection limit to 5,000 pCi/kg.. The samples for 2005 range are less than the detection limit.

Sediment samples are taken biannually in the spring and ffall. A'sediment sample is taken ranging from approximately 0.75 *to 1.25 kilograins from the Connecticut River at three separate locations in the spring and fall of each year. The sample is dried, weighed on a top loaded balance and placed in a 500 milliliter HDPE (high density polyethylene) bottle. The sample is counted on the gamma spectrometer system using a reverse germanium detector. A normal spectrum will include primordial radionuclides with daughters, and archival cesium-137 from former open atmospheric nuclear testing.

On occasion' short-lived cosmogenic beryllium-7 can be discerned. Reporting units are pi.cocuries per kilogram with 2 sigma" (standard deviation) value.

SPRING (picocurie/kilogram)

FALL

.(picocurie/kilogram)

SEDIMENT 2005

  • Samples were also evaluated for the radionuclides listed beldw. None were present in excess of the lower
  • limits of detectability which are shown in pCi/kg.

',MRadi~fific~ide 6-L

~h*A~ Ridiohiuilide&

LLD

-Chromium-5 69 Antimony-126 18 Manganese-54 15 Iodine-131 -

77 27 Cobalt-56 15 Cesium-134 58 Cobalt-60 21 Cesium-136 18 Zinc-65 18 Cesium-137 5

Strontium-85.

86 Cerium-139 93 Ruthenium/Rhenium-32 Cerium-141 98.

103 Antimony-124 18 Cerium-144 98

, ')Archival atmospheric testing (2) Terrestrial radioactivity (3) Cosmogenic

'LLD = Lower Limit of Detection

[11 Li 1:5 u-mu Lii

0lL7

~D~MENT

-A Clb VA I,

.0goo VEL CH4ARLES HILL I

got Ho K

iSOUTH VERNON

t SOIL 2005 All soil samples for the Year 2005 are within the expected historical range.

The historical range for cesium-137 '() is from less than the detection limit to 500 pCi/kg. The samples for 2005 range from less than the detection limit to 1,780 pCi/kg. Samples from" indian Point Park and Renaud Brothers are greater than the historical limit, but are likely to have been' affected by differences in archival atmospheric testing deposition or unintentional collection of ash'from old sites where trees or scrub were burnt.

The historical*range for potassium-40 (2) is from 7,000 to 20,000 pCi/kg. The samples for 2005 range from 604 to 19,800 pCi/kg.

The historical'range for beryllium-7 (3) is from less than the detection limit to 600 pCi/kg. The samples for 2005 range from less than the detection limit to 660 pCi/kg. The sample from Dummerston State Highway Garage is greater than the historical limit, however Be-7 isa naturally.

occurring cosm ogenic radionuclide and may be affected by human activities.

Occasional sampling, most often once a year, is done on other soils as available or needed. Samples are collected (usually in the northwest quadrant) within a mile or two from thefacility. Sample sizes range from 250 to 1,000 grams. The samples are weighed, dried and placed in 500 ml wide mouth HDPE (high density polyethylene) bottles and analyzedon the gamma spectrometer system using a reverse germanium detector.

Usual spectra include primordial radionuclides, archival cesuim-137 and occasional cosmogenic.beryllium-7. Reporting units are picocuries per kilogram with 2 sigma (standard deviation) value.

C-

SOIL 2005 (picocuries/kilogram) 6Loation* *,

J i

Seson>*

  • Cesmiuhi137..

'Pot assi6i i40,Q,Beryllinm-7;*:*

Northwest Corner Vermont Fall (October) 148 + 29 15000 + 900

< LLD Yankee Fence Indian Point Park Summer (July) 1510+ 100 10300+ 900

< LLD Miller Farm Outside of Milking Summer (July) 196+35 17600+1100

<LLD Parlor Renaud Brothers Spring (May) 1780 + 100 19800 + 1200

< LLD Renaud Brothers Summer (June) 488+44 12600 + 700 390 + 203 Renaud Brothers Summer (June).

139 + 36 12800 + 700 530 + 157 Renaud Brothers Summer (June) 236+37 12400 +800

<LLD Power Line River Crossing Spring (May) 118+30

.12800 + 800

< LLD Dummerston State Highway Summer (June)

< LLD 18000 + 1000 660 + 1000 Garage New England Power Dam Summer (June)

< LLD 8630 + 570

'< LLD Beach Sand D & E. Tree Mulch Summer (June)

< LLD 604+89

< LLD Wilmington State Highway

-Fall 110+22 15200 + 1000

< LLD Garage

, i _

(September)

SOIL 2005 Samples were also evaluated for the radionuclides listed below. None were present in excess of the lower limits of detectability which are shown in pCi/kg.

Chromium-51 69 Antimony-126 18 Manganese-54 15 Iodine-131 27 Cobalt-56 15 Cesium-134 58 Cobalt-60 21 Cesiumr 136 18 Zinc-65 18 Cesium-137 5

Strontium-85 86 Cerium-139 93

,,Ruthenium/Rhenium-103 32 Cerium-141 98

-Antimony-124.

18 Cerium-144>

98

0) Archival atmospheric testing, (2) Terrestrial radioactivity.'

(3) Cosmogenic LLD = Lower Limit of Detection i

n r

We I

4-6

~VERNON IL-oft goo-

SOiL II.

I I.

I.

U I

I

-p 1/#~so1 9L~

I I,I.

'I E

SOUTH 1

VERNON

GU20GUILORD A

WILKEN HILL

,^1300JO.

so-.

IrD

LA

SOIL r-m I

THERMOLUMINESCENT DOSIMETRY (TLD) DATA 2005 All TLDs for the Year 2005 are within the expected historical range..

The annual exposure at the boundary of Vermont Yankee is less than 20 - 5 milliroentgen for 2005.

The historical. range for TLDs ranges from 0 to 12.5 milliroentgeii/quarter. The samples for 2005 range from less than the detection limit to 4.5 milliroentgen/quarter.

Thermoluminescent detectors are provided to the State of Vermont by Global Dosiffietry. TLDs are deployed for a quarterly sampling interval.,

This method samples direct gamma radiation in the environment.ý Detectors utilize crystals, which store energy from gamma and x-rays until analyzed for their cumulative energy exposure experience. Vermont has forty one selected locations where direct radiation levels are measured. Some of these sites are located where other types of samples are taken (e.g. air milk, water, etc.).ý Levels of direct radiation from the natural environment are routinely detected at each site. Reporting units are milliroentgen/quartei. The TLD exposures listed below exclude background. Background is based on the average of TLD measurements at the Putney Town Clerk, Putneyand State Highway Garage, Wilmington TLD stations. In these measurements 1 milliroentgen is equal to 1 mrillirem according the Vermont Regulations,' Part 5, Chapter 3.

THERMOLUMINESCENT DOSIMETRY (TLD) DATA 2005 EXPOSURE RATES 2005 (milliroentgen/quarter)

Miller Farm, Vernon

-0.5 4 1.2

-1.0 +/- 0.0

-3.5 - 1.2

-3.0 +/- 1.2 0.0 +/- 2.0 Elementary School Exterior, Vernon *

-1.5 +/- 1.2

-1.0 +/- 2.3

-0.5 4 1.2 0.0 + 1.2 0.0 +/- 3.1 Elementary School Interior, Vernon 2.5 4 1.2 2.0 +/- 0.0 2.5 +/- 3.5 3.0 +/- 0.0 10.0 +/- 3.7 VY North Fence, Vemon.

-2.5- +/-1.2 1.0+/- 0.0 0.5 +/-4.2 3.0- +/-8.7 4.5 +/- 9.7 VY Parking Lot Fence, Vernon 1.5 +/- 0.0 4.5 +/-1.1 4.3 2.0 4.0- +/-2.0 14.3 3.0 Dummerston State Highway Garage (IFO)*

0.5 +/- 1.2 0.0 +/- 0.0

-0.5.

1.2 0.0 +/- 1.2 0.5 - 2.0 VY. Southwest Fence, Vernon 1.5 +/- 7.6 0.0 +/- 2.5

-0.5 +/--2.0

-1.0 +/- 0.0 1.5 - 8.2 Renaud Bros. (Puffers), Vernon*

0.5 - 5.3 0.0 - 0.0

-0.5 +/- 2.0.

-1.0 +/- 0.0 0.5 -5.7 Tyler Hill & Franklin Road, Vernon*

-0.5 0.0

-1.0 1.2

-2.5-A1.2 1.0+/-1.2 1.0 2.0 Power Line River Crossing, vernon*'

-1.5 3.1

-1.0+/- 1.2

-1.5 +/-2.3

-2.0+/-2.0 0.0 4.5 Blodgett Farm, Vernon

-1.5 1.2 0.0-11.2

-1.5 +/-2.0 1.0+/- 1.2 1.0'+/- 2.8 Henry Transportation/D&E Tree, Guilford *

-1.5 0.0

-3.0 +/- 0.0

-3.5 2.0

-2.0 +/- 1.2 0.0 +/- 2.3 Guilfoid Town Highway Garage, Guilford

  • 0.5 1.2

-1.0 +/- 0.0

-1.5 - 0.0

-1.0 +/- 3.5 0.5 +/- 3.7 Evaris Farm, Guilford'

-0.5 +/- 0.0

-2.0+/-- 1.2

-3.5'+/- 0.0

-1.0+/- 1.2 0.0+ -1.6 Putney Towri Clerk, Putney,

-0.5 +/-2.3

-2.0'+/- 1.2

-1.5 +/- 1.2

-1.0+/- 1.2 0.0+/-.3.1 State Highway Garage, Wilmington

  • 0.5 1.2 2.0 +/- 3.5 1.5+ +/-0.0 1.0 0.0 5.0 3.7 West Brattleboro State Police*

-1.5 2.3 0.0 +/- 4.2

-3.5 +/- 1.2

-3.0 0.0 0.0 4.9 Windham County Courthouse, Brattleboro*

-2.5 1.4

-4.0:h 0.0

-5.5 +/- 2.3

-4.0 1.2 0.0 +/- 2.9 SmeadLumber,,Vermonor

-1.5 1.2

-1.0+/- 1.2

-1.5+/-L2.3

-1.0 1.2 0.0+/-3.1 Rte. 142 N & Pond Rd.; Vernon

-1.5+/-2.0

-1.0+/--5.0 0.5.5.7

-2.0'+/- 1.2 0.5+/-7.9 Edgewood Dr. &West Rd., Vernon

-1.5 3.1 1.0 +/- 2.0

-1.5 1.2.

-1.0 +/- 1.2 1.0'+/- 4.0 Fairman Rd.,'Vemron

-1.5.

1.2 0.0+/--2.3

-1.5 1.2

-1.0+/- 1.2 0.0+/--3.1 Pond Rd. & Houghton Hill Rd., Vernon

-2.5 1.2

-2.0- +/-1.2

-1.5 2.0

-2.0 +/- 1.2 0.0 +/- 2.8 Rte. 5, Wolosko, Guilford (10) 0.5 3.1 0.0 +/- 1.2 2.5 4.6 1.0 1.2 4.0 +/- 5.8 Rte. 5, Andrews Cemetery, Guilford (40)

-1.5 +/- 2.3 0.0 +/- 2.8

-0.5 +/-2.0

-1.0 0.0 0.0 +/- 4.2

EXPOSURE RATES 2005 (milliroentgen/quarter),

~:

,>'i

~ocaion1~

tr.~

~ Q.j 3

k3d~t;~

Q V'th Qt.YEAR'ý;-7

'Rte. 5 &Tkaczyk Farm Rd., Guilford (11)

-1.5-2.0 0.0+-1.2

-1.5+/-1.2

-1.0'+/-1.2 0.0+/--2.8 TylerHillRd.,Vernon

-2.511.2 0.0- 1.2

-1.5+/- 1.2

--. 0 +/-0.0 0.0+/-2.0 Rte. 142 N of Transmission Line, Vernon

-2.5 +/- 1.2 0.0 2.0

-0.5 +/- 1.2 -

-1.0+/- 2.0

-0.0+/- 3.3 Rte. 5 &' Guilford Ctr. Rd., Guilford (14)

-0.5 +/- 1.2

-1.0 1.2

-1.5k -0.0

. -2:.0+/- 2.0

+/-0.04-2.6 Guilford Ctr Rd. & Tater Rd., Guilford 0.5 -6.4

. 0.0 +/-1.2

-2.5 - 1.2

-1.0+-1.2.

0.51-6.7 Weatherhead Hollow & Stony Hill Rds, Gfd

-1.5 - 0.0

-2.0 1.2

-4.5 - 1.2

-2.0 - 2.0-,.

0.0 +/- 2.6 Huckle.Hill Rd. N ofVT/MA Border, 0.5 1.2 1.0+/- 1.2

.0.5 :1.2 1.0 2.0 3.0+/-:h 2.8 Vernon'______

Dummerston School, Dummerston, Rte. 5

-1.5 A 1.2

-2.0+/- 0.0

-2.5 L 1.2.

-1.0 - 0.0 0.0 - 1.6 Pond Rd., Vernon Rec. Area, Vernon

-1.5 +/-.2.0

-2.0 +/-- 2.0

-2.5 +/- 0.0.

-3.0 +/- 0.0 0.0 +/- 2.8 VernonFire Dept., Vernon, Rte. 142 1.5-1.2

.0.0 1.2

-2.5 +/- 0.0

-2.0 +/- 0.0.

0.0 +/- 1.6 Rte.142 S'&PondRd.,Vernon

-1.5+/-0.0

-10 1.2

--1.5 +/- 1.2

-1.0+/-2.0, 0.0+/--2.6 Rte: 142 & Newton-Rd., Vernon

-1.5+/-0.0

-2.0+/-'1.2

-2.56 L2

-2.0+/-.3.1 0.0+/- 3.5..

Rte. 142 & Depot St., VT/MALine, Vernon

-0.5-+/-1.2

-1.0+/- 1.2

2.5 1.2

. -2.0+/- 1.2 2.5+/--2.3 Gov. Hunt Rd. at Vernon Elem. School 0.5 0.0 0.0 +/- 11.2, 0.5 +/- 0.0 0.0 +/- 1.2 1.0+/--1.6 Putney Utility Pole 1.0+/- 0.0 1.51.4 2.0+/- 5.8 3.0+-5.9

.Wilmington Utility Pole*.

--1.5+/-0.0

-2.0+/-12.

0.0 1.2.

  • Collocated with Air Sampling Station
    • Stations established in the second and third quarters of 2005.

THERMOLUMINESCENT DOSIMETRY 15 10

.I-Cu

.E 5

0

-5

-10 DA TEQ"

'DATE..

Miller Farm

-U-Vernon Elem School Exterior Vernon Elem School Interior

I THERMOLUMINESCENT DOSIMETRY mI-.

CE E

ý,pz T'

,~

,Z 7Z ZNNNNý

~

?

t b

X-*--VY North Fence

-)---VY Parking Lot Fence DATE N

THERMOLUMINESCENT DOSIMETRY

.h, J",

15.

10 Lm E

5 0

-5

-10 Dummerston State Hwy Garage VY Southwest Fence Renaud Bros S~~~l S§ P6Nz z Z Z,(

Z -iIZ )RlZ, (iSý DATE '

THERMOLUMINESCENT DOSIMETRY 15-12~

A ~~~q p~.....

10.

A A'~~'~C~-

~

'~'~A

,..4

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~

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7 Blodgett Farmn

'zi~..

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-10 000 C)

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cL >, a.

c

r. >,o LC:

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>,a MU (U

)

(U wU

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c (u

a)

(a U

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DATE'

.THERMOLUMINESCENT DOSIMETRY 15 10 LM CU5 E 0

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-X-Guilford Town Hwy Garage X Evans Farm C) 0~ C)

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.... THERMOLUMINESCENT DOSIMETRY 15 10 Cu i20

-5 0- Putney Town Clerk 0 0 D0 0

0 0

0)0 0

0) 0 0

CDO 0

0)C 0 0O 0

0 0

0ý DATE Wilmlngton State Hwy.Garage" W Brattleboro State Police

I THERMOLUMINESCENT DOSIMETRY 15 10 L_G) 5

-5

-10

-X-- Windham County Court

)*-Smead Lumber 00 a

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THERMOLUMINESCENT DOSIMETRY 1 5

.4 f4 y'2;.

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'..4 44

ýel~'A

- 441 iI't 10 Pond Rd

( Zj K

tK-U-Edgewood

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15 5

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R)~~~

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THERMOLUMINESCENT DOSIMETRY 15 10 U,

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a) a0 C.D 0

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THERMOLUMINESCENT DOSIMETRY

.15 10

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.- X--- 142 N Transmission Line

-*-Rt 5 & Guilford.

Center Rd CZ cz 0z 0z V.-

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Stony Hill Rd Huckle Hill DATE

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ý:THERMOLUMINESCENT DOSIMETRY 15 10 to 0*

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-15 Apr-05.,.

Jul-05 DATE Oct-05 - Putney Pole

-U--Wilmington Pole

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TRITIUM IN WATER 2005 VERMONT YANKEE (CONNECTICUT RIVER)

All tritium in water samples for the Year 2005 are within the expected historical range.

The historical range for tritium in water is less than the detection limit. The samples for 2005 are less than the detection limit.

As part of the water, sampling effort, an aliquot of the monthly water samples is analyzed for tritium (hydrogen-3). Two locations are reported monthly for tritium content from the Connecticut River (upstream and downstream Of the nuclear power station). The samples are analyzed by liquid scintillation counting.

The' detection limit for tritium is 0.5 nCi/l. Reporting units are nanocuries/liter with 2 sigma (standard deviation) value.

WATER (nanocuries/liter)

January

<0.5

<0.5 February

< 0.5

<0.5 March

<0.5

<0.5 April

<0.5

<0.5

-May

< 0.5

<0.5 June

<0.5

<0.5:

July

< 0.5

< 0.5

August,

< 0.5

< 0.5 September

< 0.5

<0.5 October

< 0.5

< 0.5 November 0.5

<0.5 December

<0.5

" <0.5*

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STflITZUM

WATER SAMPLES 2005 All water samples for the Year 2005 are within the expected historical range.

The historical range for alpha is from less than the detection limit to 15 pCi/l. 'The samples for 2005 range.

from less than the detection limit to 8.4 pCi/l.

The historical range for beta is from less than the detection limit to 15 pCi/I. The samples for 2005 range

-from less than the detection limit to 5.8 pCi/1.

Water samples are collected monthly from 8 sites. One gallon of water is placed in a re-entrant beaker and analyzed on the gamma spectrometer system using a reverse germanium detector. Usual spectra include primordial radionuclides. A priori detection limits are 3 pCi/i for alpha and 4 pCi/i for beta.

Reporting units are picocuries per liter with 2 sigma (standard deviation) value.

WATER 2005 (picocuries/liter)

MnhTest

,ernon-e Schoo elDa Disc arg e,

~

in~

January Alpha 6.2+1.1

-0.5+1.6 0.0+1.6

-0.0+1.6 aBeta 2.3+1.8 0.3+1.8 2.9+1.8

-0.3+1.7 Gamma

< LLD

< LLD

< LLD February

Alpha, 7.5 + 1.2 1.1 + 1.4 1.8 + 1.6 1.1 +1.4 Beta 2.7+1.8 2.1+1.8 0.5+1..8 1.1+1.8 Gamma

<LLD

<LLD

< LLD March Alpha 6.7+1.2 0.8+1.4 3.1+1.6 0.5+1.4 Beta 4.9+ 1.9 1.8+ 1.8 1.8+ 1.8 2.8+ 1.9 Gamma

< LLD

< LLD

< LLD April Alpha 7.2+1.2 1.2+0.9 0.6+0.8.

0.8+1.5 Beta 2.9 + 1.9 0.2 + 0.9 0.4 + 0.9

-1.1 + 1.8 May Gamma

< LLD.

< LLD

< LLD May Alpha 6.1+1.1

-0.8 + 1.4 1.4+1.5

-0.2+0.8 Beta 4.7+1.8 2.8+1.7 2.2+1.7 1.6+0.9 Gamma

<LLD

<LLD.2

<LLD June Alpha 6.1 + 1.2 0.8 + 1.4 0.5 + 1.3 0.5 + 1.4 Beta 3.1+1.9 1.7+1.8 1.4+1.8.

1.4+1.8 Gamma

< LLD

<LLD

< LLD July Alpha 4.7+1.0 0.6+1.5 1.1 +1.5 1.6+1.5 Beta 5.8+1.9 2.3+1.8 3.1+1.8 0.8+1.8 Gamma

< LLD

< LLD

< LLD

< LLD August Alpha

'6.2 + 1.1

-0.6+1.4 0.6+1.5 0.2+0.8 Beta 4.2+1.8.

2.5+1.8 3.1 + 1.8 1.2+0.9 GaSpa' b

<LLD

< LLD

< LLD

< LLD September Alpha 6.4+1.1

  • 0+1.4 1.1+/-1.5 0.6+0.8 Beta' 4.9+1.9 0.6C+ 1.8 1.7+1.8 0.8+0.9 Gamma

< LLD

< LLD

< LLD October....

Alpha 7.0+ 1.2..

2.5+0.9-

2.1+ 1.3 0.9+0.7 Beta' 2.3+2.0 2.5+1.0 4.3+2.0'

-0.8+0.9 November Gamma

<LLD

<LLD

  • <LLD November Alpha

'5.3 + 1.0

-0.5+1.0

.- 0.9 +1.0" 0.4+1.0 Beta'

  • 3.3+2.3

-0.1+1.1" 0.2+1.

-0.1+1.1

,Gamma

<LLD' LLD

<LLD December.

Alpha 8.4 + 1.2`

1.9+-1.4 1.4+ 1.3 0.3+ 1.4 Beta' -

4.9+1.9 2.3+1.8 1.5+1.8 1.4+1.8

_'-Gamma.

'<LLD

<LLD

<LLD

WATER 2005 (picocuriesfliter)

'January,,

Alpha' 1.4_+ 1.7

  • -0.3 + 1.6,

0.9 +1.7.,

-0.5 +1.6 ama!.

Rv "LD~ii

tea...8.

2 owstea Betma 1.8+1.

0.21D 2.9+1.

.2 D.0+.

G ma D

<L'LD.......

< LLD...

... < LLD..x...

February Alpha 0.6 + 1.4:

1.6+1.4 2.1+1.6

-Beta -

0.2+1.7..

0.9+1.89

+

..1.7+1.8 Gamma

<LLD

,-LLD

<LLD

March, Alpha:

0.9+1.5 1.4+1.5.

0.5+1.3 1.1+1.4 Beta 0.9+1.8.

3.2+1.9

-0.3+1.8, 1.1+1.8 Gamma

<LLD,

.<LLD

<LLD

.<LLD April Alpha-2.6+1.6,.

0.5+0.8, 0.5+0.6:

.1.1+0.9 i:

Beta

- -1.2+ 1.8, 0.I1+0.9 0.3+0.6 1.4+0.9.

Gamma

<LLD.-

<LLD

-- <LLD

<LLD May

, Alpha 0.0+0.8.

0.0+1.4

-0.6+1.4 0.6+1.5 Beta 1.6+0.9.

1.3+1.7 2.8+1.7, 3.2+1.8 Gamma

-<LLD

<LLD,-

<LLD

-<LLD June Alpha 0.8 + 1.4 0.8 +1.4 1.6+1.4 0.3+13 Beta

.0.5+1.8 1.8+ 1.8 "0.2+ 1.8 0.5+1.8 Gamma

< LLD

< LLD,

<LLD,.

<LLD July Alpha

.0.5+1.4 0.6+1.5,

0.8 + 1.5.

0.3+1.4 Beta 2.6+ 1.8 2.3+1.8 2.0+1.8 0.9+1.8 Gamma

<LLD

<LLD

<LLD

<LLD -..

August Alpha 0.0+1.4 0.0+1.4 0.3+1.4'.

-0.6+1.4 Beta

  • 0.9 + 1.8 1.4+1.8 2.9 + 1.8.

2.9 + 1.8 Gamma

<LLD

<LLD

<LLD

<LLD September Alpha 2.0+1.5.

0.8+1.5 1.5+ 1.6 0.8+1.5 Beta 1.4+1.8 0.6+.1.8 2.6+.1.8-1.5+1.8 Gamma

<LLD

<LLD

<LLD

!..LLD October Alpha 1.1+1.3 0.6+_0.7 -

0.5+0.6 0.8+1.2 Beta 3.4+2.0 0.9+1.0 1.-1+1.0.;

-0.6+1.9 Gamma

<LLD

-<LLD,

<LLD

.<LLD November Alpha 0.3+0.9

. 0.6+1.0 0.9+1.0 0.3+1.0 Beta 0.6 + 1.1 0..2+1.1 0.4+1.1

-0.1+1.1 Gamma

<LLD

<LLD-

< LLD

.,<LLD December Alpha 1.4+0.8 0.5+1.3 0.3 + 0.4.::

1.1+1.3 Beta 1.5+0.9 7 1.5+1.8 0.8+0.5 0.8+1.8

'Gamma

< LLD,

< LLD

< LLD

-<LLD-

  • Naturally Occurring Radionuclides
    • River was frozen at this location in February.

LLD = Lower Limit of Detection

GROUND WATER GROSS BETA

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-- *-Power Line River Crossing

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