ML17289A769

Radiological Environ Monitoring Special Rept for Jul 1992.

ML17289A769
Person / Time
Site:	Columbia
Issue date:	07/31/1992
From:	WASHINGTON PUBLIC POWER SUPPLY SYSTEM
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Shared Package
ML17289A768	List: ML17289A767 ML17289A769
References
NUDOCS 9208060168
Download: ML17289A769 (67)

Text

RADIOLOGICALENVIRONM1PlTALMONITORING SPECIAL REPORT JULY 1992 .

P20806Q168 92o 73Q 3o PDR ADOCK 050003977 R

STATEMENT OF THE PROBLEM:

Water samples taken on April 29, May 13 and May 18, 1992, from the outfall to the storm drain event pond on the Plant 2 site contained elevated levels of iodine-131, cerium-141, and tritium. These samples also contained detectable levels of manganese-54, zinc-65, antimony-125, cesium-137 and cobalt-60. The concentrations of iodine-131 found in these three samples were 12.6, 21.1 and 1.2 pCi/liter. The tritium concentrations were 270,000 and 120,000 pCi/liter for the May 13 and May 18 samples, respectively.'he estimated second quarter 1992 average concentrations determined for iodine-131 and tritium were 2.4 pCi/liter and 46,000 pCi/liter, respectively.2 These estimated average concentrations exceed the Nuclear Regulatory Commission's (NRC's) reporting levels for iodine-131 and for tritium, as given in Table 6.3.1.1-2 of the Offsite Dose Calculation Manual (ODCM). In addition, the individual results exceeded the investigation levels set by the Washington State Department of Health (DOH) and the Supply System for Radiological Environmental Monitoring Program (REMP) samples.'ISCUSSION The Plant 2 storm drain system receives water from several sources, including building roof drains, the Service Building fioor drain sump, Diesel Generator Building fioor drains, air-handling unit drains, backwash efiluent from gravity and carbon filters in the Service Building, Turbine Building nonradioactive fioor drains, and the dike around the condensate storage tanks. Water released through this system fiows to a small pond area, about 400 feet

'o tritium data is available for the April 29 sample.

2 Based on time-weighted averages of all sample results. Averages of only the biweekly samples taken during the quarter weie 4.0 an*d'91,000 pCi/liter for iodine-131 and tritium, respectively.

'etter from R.A. Chitwood, Supply System, to Bob Mooney, DOH, "Establishing

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Reporting Levels for Supply System REMP Results,",dated March 26, 1986; letter from John L. Erickson, DOH, to Joe Bell, Supply System, dated January 17, 1991.

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in length, which is situated approximately 1500 feet northeast of the plant. The estimated water fiow to the storm drain is approximately 30,000 gallons per day.

Floor drains in the Diesel Generator, Service, and Turbine Buildings, as well as the storm water drainage, are normally considered nonradioactive. However, the potential for radioactivity to enter these systems has been recognized. The drainage from the nonradioactive fioor drain sumps in the Turbine Building is monitored before and during release to the storm drain by detectors which have alarm setpoints at 80% of the 10 CFR 20 Appendix B Table II value for cesium-137. The other Qoor and equipment drain systems connected to the storm drain system are not monitored. Drainage from the dike around the condensate storage tanks is analyzed before being routed to the storm drain or to radwaste.

Sediment samples and occasional water and vegetation samples have been collected from the storm drain since 1985. Low levels of cesium-137, cesium-134, cobalt-60 and zinc-65 have been routinely detected in the storm drain sediments, but no detectable radioactivity has been found in the vegetation and water prior to this year. The REMP began in February 1992 to take biweekly water (grab) samples and quarterly soil and vegetation samples, in addition to the monthly sediment samples from the storm drain outfall. Summaries and graphs of the sediment, water and vegetation results prior to 1992 and during the first four months of 1992 are presented in Attachments 1 and 2. The soil sample results are not included, since they are not directly related to the issues presented here.

On April 29 and May 13, 1992, the biweekly water samples and the monthly sediment samples were collected from the storm drain outfall. On May 15, Teledyne Isotopes, the analytical contractor for the REMP, reported that the gamma isotopic analysis results for the April 29 water sample indicated that it contained 12.6 pCi/liter of iodine-131. Recounts of the sample supported that analysis. On May 21, gamma isotopic analysis results for the May 13 water. sample indicated not only detectable iodine-131;- but detectable levels of several other radionuclides. A later tritium analysis indicated significant levels of that radionuclide, as well. The May 13 water sample results are presented in. the following table.

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Also included in that table are the NRC reporting:levels, the DOH investigation levels and

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80% of the 10 CFR 20 Appendix B Table II maximum permissible concentrations (MPCs) for comparison.

MAY 13, 1992, WATER SAMPLE RESULTS COMPARED TO REGULATORY LEVELS (pCi/liter)

NRC DOH Reporting Investigation 80% Table II Nuclide4 ~SI R ] +2 Level " Level Value iodine-131 21.1 + 5.0 240 manganese-54 5.8 + 3.6 1000 100 80,000 cobalt-60 124.7 + 7.7 100 40,000 zinc-65 52.9 + 10.2 300 100 80,000 antimony-125 20.8 2 9.6 Not given 100 80,000 cesium-137 5.7 + 3.3 50 100 16,000 cerium-141 707.0 + 11.6 Not given 100 72,000 tritium 270,000 + 10,000 30,000 1000 2,400,000

• quarterly average concentration On May 22, PER // 292-0531, describing the storm drain water radioactivity, was completed.

The State of Washington DOH was notified that the investigation levels for iodine-131, cerium-141 and cobalt-60 had been exceeded. The Region V office of the Nuclear Regulatory Commission was also notified of the results. Later, when the tritium result for the May 13 sample was received, DOH was again notified that an investigation level had been exceeded.

Tritium analyses were also performed on later samples, but none were as high as the May 13 sample. The second highest concentration was in the May 18 sample, which contained 120,000 pCi/liter. The quarterly average concentrations for iodine-131 and tritium estimated for the Second Quarter 1992 were, therefore, 2.4 and 46,000 pCi/liter, respectively.

'nalyses for strontium were also performed on this sample. The strontium-90 and strontium-89 results were below detection limits.

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Summaries of the water sample results and percentages of the MPCs from 10 CFR 20 Appendix B Table II for water samples collected during the Second Quarter 1992 are presented in Attachment 3. The highest percent of an MPC during the quarter was the May 13 tritium result, which was 9% of the MPC value. Water samples collected after May 29 have not contained detectable levels of gamma-emitters or tritium.

The results of gamma and tritium analyses performed on other water samples taken before and during the second quarter indicate that the ratios of tritium concentrations to the concentrations of gamma-emitters, such as cesium-137, vary greatly. In storm drain water collected March 18, for example, the tritium concentration was elevated, 15,000 pCi/liter, while the only principal gamma-emitter detected was cobalt-60, which was present at a low concentration. The sump monitors, which can detect only gamma radiation, are therefore, not effective in preventing the release of water containing significant levels of tritium via the storm drain.

Some sediment samples taken at the storm drain outfall and pond during May also contained the same radionuclides observed in the May 13 water sample. A sediment sample taken on May 18 contained detectable levels of manganese-54, cerium-141 and cesium-134, in addition to the cobalt-60, zinc-65 and cesium-137 previously observed in the sediment. These radionuclides continued to be detected in sediment samples in June and July. A summary and graphs of these recent sediment sample results are presented in Attachment 4.

A special set of water, vegetation, and sediment samples was taken on May 22 at the pipe outfall and at Qve other locations around the pond, in order to characterize the spread of radionuclides to various parts of the pond. The concentrations of gamma-emitters in the water were below detection levels at all locations. The tritium results, however, were above detection levels at all locations. One water sample taken from the point furthest from the drain outfall, Location E, had a tritium result that exceeded the 1,000 pCi/liter DOH investigation level. The cobalt-60, zinc-65, cesium-137 and cerium-141 concentrations found in the sediment at some locations, especially at the point where the narrow stream bed widens into the main pond, area, were above DOH investigation levels. Cattails collected at

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two locations in the pond had no detectable radioactivity, aside from potassium-40, which is naturally-occurring. As shown in Attachment 2, vegetation samples taken since then, however, have contained detectable levels of cesium-137, zinc-65, and cobalt-60. A summary and graphs of the water, vegetation, and sediment results for each sampling location used in this special study are presented in Attachment 5.

DOSE CALCULATIONS The ODCM Requirement for Operability 6.3.1.1, applies to cases when, as result of plant eQiuents, levels of radioactivity in an environmental medium exceed NRC reporting levels.

It requires that, in response to those levels, corrective actions be taken to reduce radioactive liquid eQluents so that the potential annual dose to a member of the public is: (1) E 1.5 mrem to the total body.and 6 5 mrem to any organ during any calendar quarter, and (2)

~ 3 mrem to the total body and ~ 10 mrem to any organ for any calendar year. The storm drain has no direct pathway to members of the public, so it is highly unlikely that the measured radioactivity in the pond water would impact the dose to members of the public.

Even if an individual drank this water every day, the annual dose to total body and to the maximum organ would still be below the above limits.'AUSES OF THE RELEASES TO THE STORM DRAI¹ The most probable sources of the radioactivity observed in the storm drain pond were releases of liquids associated with the turbine replacement and other nonroutine outage work in the Turbine Building. Other contributing factors include the use of 10 CFR 20 Appendix B Table II levels as the criteria for releases, sump monitor setpoints, the assumption that sufhcient levels of gamma-emitters would accompany the beta-emitters and the limited ability of the radwaste processing system to handle water with high organic and silica content.

'he estimated total body and maximum organ doses. for the second quarter are 0.4 and 1.5 mrem, respectively. The estimated annual doses to the total body and to the maximum organ are 1.6 and 5.9 mrem, respectively: These estimated doses were calculated using the quarterly averages and ODCM Equation 5.

The specific factors that have been considered in order to resolve the problem are:

a) Some water has been released to the storm drain if the radioactivity it contained was below 80% of 10 CFR 20 Appendix B, Table II levels. Since the sump monitoring systems are designed to detect 80% of the 10 CFR 20 Appendix B Table II levels of radioactivity, levels below the Table II values could be released to the environment. These levels are up to 1000 times greater than the NRC reporting levels for environmental samples; b) The sensitivity of the sump monitors and the residual radioactivity in the Turbine Building nonradioactive sumps makes the monitoring equipment appropriate only for detecting gamma radioactivity in the sump. The monitors

,are not,designed to detect beta-emitters; c) .

Supply System policies and procedures do not clearly specify the criteria for the release or the transfer of water from potentially contaminated sumps to clean drain systems.

CORRECTIVE ACTIONS:

The ODCM Requirement for Operability 6.3.1.1 requires that corrective actions be taken to reduce radioactive efiluents so that the potential annual dose to a member of the public would be within the limits discussed in the Dose Calculation section of this report. Based on the conservative evaluation performed, no corrective actions are needed to reduce the dose to the public.

The Supply System's response to PER 292-0531 (elevated levels of radioactivity detected in the storm drain pond) included the following actions:

a) Administrative controls were tightened on release of liquids to the storm drain system to preclude further releases of radioactivity;

b) A formal root cause analysis was instituted to identify the causes of the elevated readings and further corrective actions to prevent recurrence of the problem; c) Efforts underway prior to the event were accelerated to ensure that all floor drains were properly and clearly labeled to distinguish between radioactive and nonradioactive drains, and established policy prohibiting discharge of liquids to plant drains was reinforced.

Proposed corrective actions from the root cause analysis include strengthening and clarifying the policies and procedures, investigating the monitoring system capabilities and sensitivities

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to determine the feasibility of improving the sensitivity to low levels of activity, and investigating other leak paths into the system to ensure that all sources of radioactive water are isolated. These actions are judged to be sufficient to prevent recurrence of the spikes of activity observed in the storm drain pond.

ATTACHMENT 1 ST101 SEDIMENT - 1987 TO APRIL 1992

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1987-92 ST101 SEDIMENT RESULTS - PICOCURIES/KILOGRAM DATE CS-137 CS-134 CO-60 CO-58 ZN-65 1-131 01/09/87 3.80E+O1 4.50E+00 7.80E& I 7.90E+00 8AOE+02 01/27/87 4.8 I E&I gr ~',".<5jli';c'> 4.35E&2 3.93E&I 1.84E&3 "r( qW~yx>g>rr'(x 02/05/87 3.57E+01 ""."':,"'."g4'j'x(cyys 2.08E+02 9.20E+00 1.09E&3 .<.9xcgr>ry<

02/19/87 4.70E+01 ")"'.':,'?.".r6s~$ 5, 1.37E+02 7.78E+00 9.28E+02 6Yk~o>X?~Z.r'r8&

03/20/87 3.63E&1 ~sf~! IM!j",,.-;". 3A4EtOI 5.07E+02 "rlxi':;rw<<:y,:,<.

c, < <x r 04/02/87 4.32E+Ol ',".'";";i."" Q'g( 6.93E& I '/c?(RAN~K'-'.<<'I 6.89E+02 *> 'c 04/23/87 3.15E+OI:;..'v'i "'>('FP'9'.33E+O1 1.55E+Ol 6.66E+02 >~(>>(pZ 05/01/87 4.93E+Ol 4.90E+00 7.85E&1 1.29E+01 8.76E&2 f'0'Y--NMCSN) 05/21/87 4.99E+O1 ';:,.;:,:g~;m:y~('.16E+Ol 1.62E+01 7.81E+02 K( gF~'::e~('(

05/29/87 4.70Et01 8.82E+00 6.11E+Ol 7.62E+00 6.97E+02 06/11/87 4.39E+01 7.75E+00 7. 17' 1.41 ENVOI 8.10E+02 06/28/87 4.66E+01 8.90E+00 1.00E+02 2.07E&1 8.87E+02 07/10/87 4.09E&I g',:NSg>'Irg:c 1.09E+02 2.03E+01 1.00E+03 07/13/$ 7 4.80E+Ol 1.27Et01 1.10E+02 1.86E+01 9.75E+02 07/23/87 5.35E+O1 1.48E+Ol 4.66E+02 9.36E+01 1.78Et03 ><<r'S"ypyx(c'gSp 08/10/87 4.2 I E&I,"':x(;",'ijg';><<<<'?,4, 1.07E+02 2.01E+01 9.42E+02 08/20/87 4.69E+01 ":~>c(~':.'m>'g 1.25E+02 3.35E&I 9. 14E+02 09/03/87 3.83E+01 9.79EKO 1.18E+02 2.02E+Ol 8.52E+02 <<r>:.K4'<<X/<4:(

10/09/87 4A4E+Ol NQ<r .<<x (cyc

<<<<<<.rrrc r 1.07E+02 1.21E+01 6.94Et02 2?j<>>c cl<(pic 'c 10/28/87 1.50E+02 5.42E+Ol 6.64E+02 3.49E+Ol 1.8 1 E&3 11/12/87 4. 34E+01 r".".; ir?cy'i<>x>r'((wr', 1.08E+02 1.03E+Ol 7.29E+02 I I/24/87 4.89E+Ol 2.35EtOI 1.07Et02 1.46E&I 6.82E&2 (<<i;~r.Cg>(w~&

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12/10/87 5.29E+Ol 2.82Et01 1.81E+02 3.28E&l 6.85E+02 6.06E+00 01/07/88 5.62E&l 2.54E&1 1.66E+02 9.49E+00 6.46E+02 Ol/21/88 5.49E& I 2.39EtOI 1.09E+02 1.04E+01 5.43E+02 vr'yv"2>(X wr?C <p 02/12/88 7.29E+O1 2.71E+01 1.84E&2 6.36E+00 7.57E+02 03/23/88 3.65E+01 1.78E+01 1.08E+02 3.60E+02 04/18/88 4.87E+Ol 2.16E+01 3.20Et02 R?NN~R:.-:;:; 5.62E+02 1.79E&I 05/11/88 5.67E+Ol 2.76E+OI 1.36Et02 4.27E+02 2.86E+Ol 06/09/8$ 3.75E+01 2.94E& I 1.64E+02 4'jg4p'rwXC'<'(('('?r.:<<>wc<<

3.73E+02 1.54E&1 06/28/88 6.88E+Ol 3.14' 1.63E&2 3.93E+02 07/08/88 6.94E+Ol 4.83Et01 1.57E+02 3.93E+02 07/21/88 6.85E+0 I 3.37E+O1 1.06E+02 3.ISED 08/04/88 7.78E+01 4.65E+Ol 3.31E+02 xA:x< 'c < yyr(x >?.. 'r>;

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'r"v'Cxr'Cj>>g 09/Ol/88 9.54E+Ol 4.89E+01 1.19E&3 (>r:,>c(: v 4M;.'I I.0 IE&3 09/19/88 8.76E+O1 3.71 E&1 8.74E+02 "P><<>r(>,w>cyy A 7.82E+02 10/10/88 6.88E+01 4.25E+Ol 1.91E+02 6.23E+00 3.81E~ Pc. Ark~><<M 10/25/88 6.02E+01 3.75E+Ol 9.39E& I (w.c<<~Yp>x ~x,'? 2.33E+02 >0 <<$ 3>4'yap ov<<r< .<<X<<<<>

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01/31/89 5.03E+0 I 3.26Et01 5 A IE+01 ger(x<<j( >P-v".: S 8.48E&l I;.'"~~g~Cr': ',

02/17/89 7.16' 6.40E&1 2.82E+02 2.69E+02 02/28/89 8.68E+0 I 6.35E+O1 2.40E+02 W,~YIM;,">)s., 1.97E+02 v'g: r>.g 03/23/89 5.02E+Ol 4.84E+01 I. I I E+02 1.43E+02 P<,X)P"'<v, 04/14/89 4.95E+Ol 6.60E+O1 5.73E+O1 y~>% 'Pi "c ~+5~; 8.08E&I cp y 04/28/89 8.00E+O1 7.04E+01 I A6E+02 > x><<r4r c<<r,.:.~m 05/18/89 2.99E+Ol 4.08E+O1 2.34E+O1 4.72' >~

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05/31/89 5.49E+Ol 4.09E&1 8.28E+Ol 1.00E&2 06/15/89 6.53E+01 3.58E+Ol 1.07E+02  :>i&?>(<((",>".."., 1. 19E+02 07/05/89 6.36E+0 I 3.91E+Ol 1.72E+02 6.74E+02 .>...c".. 1,>'vgr>r 08/28/89 1.14E+02 I.27E+02 5.00E+02 1.29E+Ol 1.08E&3 'c

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1987-92 ST101 SEDIMENT RESULTS - PICOCURIES/KILOGR<tl>M DATE CS-137 CS-134 CO-60 CO-58 ZN-65 I-131 09/13/89 5.8IE+OI 6.28EtOI 3.33E+02 1.04E+0 I 6.33E+02 ?y,~g),',,"',>>.,P 09/26/89 7.22' 2.46E+02 1'z;,'.":~<?'(@~j', 6.94E+02 '.n+~.~4'..,":<'.'.z' 10/13/89 6.20E+Ol 5.73' 3.03E+02 >>g>>",: j'>'s>j>zc'>)c 5.08E+02:, >; W;,<<.',cc';.;:x 10/30/89 7.67E+Ol 5.84E+01 2.48E+02 4.68E+00 5A4E+02 7.61E+00 11/21/89 6.38E+O1 4.19EtOI 1.82E+02 '<>>,z'"'4R>:. 3.25E+02>>.".>MS::R 12/07/89 9.31E+Ol 6.63E& I 3.98E+02 ~i"'i!Nz<..>>~r.'.s'> 5.81E+02 Rgg<<g~

12/20/89 9.95E+01 6.62Et01 3.50E~ 6.00E+02 6.67EKO Ol/08/90 8.70E+01 6.1 IE+Ol 2.76E+02 +g';>Pig~ 4.18E+02 k<g<<~? AS 02/05/90 8.37E+Ol 6.17' 2.99E+02 Q,:'>>>>>>gP>)>>ic>)>> 4.25E+02 4.50E~

03/23/90 .Z>, Qgyy W&x)n'>>c>e>) %~>><g'yj)y<x 'y>>

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06/07/90 1.08E&2 6 43E& I 3 36E+02 4<XL>>><9<>>iry,"~.'.44Et01 1.92E+02 "~'l,".".z:.::-'<<

06/29/90 l. 12E+02 2.46E~ ylx<n>>c><<<xi;.,>qx I 42E~ x~xcy)<:x, .>cx>>

07/13/90 8.23E+Ol 5.88EtOI 1.78E&3 jp,"'4y+q>>p".'Pf 2.32E+02 <<:j~;s".~><.">>,>>/>;>>

07/19/90 1.49E+02 9*41' 4.06E+02 ij'.zi"-.%)j5jc~~ 2.23E&2 x<'>xc<<c?Z<X>>chic 08/08/90 1.07E+02 6.87E+01 2.42E+02 g@~PIz~)x~iÃz.. 1.70E+02 g's4>>)9)'z~

08/31/90 1.04E+02 4.50E& I 1.97E~ z'">~;.:g".;<>>'5 6.70E+01 x 09/05/90 7.89E+Ol 4.98E+Ol 1.24E+02 <<P~zg'jhow<..j.'-'>> 1.41E+02 P Q;~SF'".<c 10/05/90 1.47E+02 9.67E>.",y:,.",jgQyg@ 1.49E+02 '$~~'"-j""-~~a'.

10/30/90 1.53E+02 9.24EtOI 2.60E+02 ~,':>Pp?k~% 12E+02 Ã4~<:n8.'"-;"<x">

11/08/90 1.79E+02 1.13E+02 1.75Et02 g';.'<)l<'z'><<:,",:,'-"i@>> 1.13E+02 n ~n".>~Yg>".<g:;">

11/28/90 1.56E+02 8.66' 7.55E+02 ~b'.;<:gg>g')'z:q 2.57E+02 8.;>>~,d,c)',%>>>%

12/28/90 1.55E+02 9.13E&I 2.68E+02 ~~~Pgne4>>gc 1.00E+02 "'/4>>@pc'"":>>

01/18/91 1.45E+02 7.97E+Ol 2.63E+02 jetsjn)~')>~gg> 1.02E+02 M.'.g@g~:i.

02/15/91 1.45E+02 8 21' 3 62E+02 ~@':>g4s'<>>Q 1.18E+02 <x<PPg~~j5 03/15/91 1.51E+02 9.05' 1.87E+02 j~4~wp,.<.Qj 7.09E&I 8.96Et00 03/29/91 1.68E+02 8.64' 2.37Et02 j'8:",.1-.':>S~P$ 8.14E+O1 @gayx ~<.".:".>p, 04/17/91 1.58E+02 8.90E+01 1.80Et02 x)xz>>>>gi 'jz".';j,'y 7.02E+01 nyiI+~%'Qi<;

05/15/91 1.66E+02 1.04E+02 1.28E+02 ~,')"".:;>>>0>>z"'<P 1.70E&2 @+'<<'.>':.i";.'-z, 06/19/91 1.44E&2 1.04E+02 9 A8E&2 d 4yj'><II!>>~'4<'x. 1.47E+02 @<g.":<)I":;)<'-.",

06/28/91 8.57E&I 5.93E& I 1.63E+02 6.00E~ 7.30E+Ol !g. >>9>>>:y" ~\<x) 07/11/91 5.59E+Ol 4 67E+01 I, 19E+02 jx<>>s~/>'~x':PPs 5.87E+Ol z)+Pg~~'zVq>,'

07/25/91 6.68E&1 4.65E+Ol 1.13Et02 ~<~~,,>>).>>~gQ 14',gc'QP>>nP" zz>>c 08/20/91 7.50E+01 4.98E+Ol 1.53E+02 Fg"~,.',,)'"'.j, 4.49EtOI ~~>'<'"4'~>.;

08/30/91 8.03E&I 4.90E+Ol 1.17E+02 @,','>>'>>>py>>>><',i? 4 05E+01 >x>>>yggxvxc'rv<c>>

09/13/91 1.01E+02 6.35E+Ol 4.49E+02 '<yl4~,.'>'z)>>> 8.75E+Ol ij~~>>~C)".:;x!

10/01/91 8.20E&1 5.73E+O1 1.96E+02,":;~'zs":x'~Fbi) 7.67' >>ck<> "'~)."

10/18/91 8.25E+01 5.10E+01 1.06E&2 4.95E+00 5.64EKI 10/31/91 9.47EtOI 5.25' 1.77E+02 r;.'>zz>,lx"..-;.":;":,

I I/21/91 4.83E+Ol 3.62E+01 1.16E+02;,.Nezpg'.>> 4.04'  ?:.>>)'-;>jg"nx>c 12/12/91 6.28E&l 4. 17' 9.04E+Ol 3 07E+O1 .z".."-'r"""'.;"4>

12/31/91 8.69E+01 4.30E& I 7 7 IE&I n~q:a<xn'<c'pj:,';+ 5.96E+O1 >>z>>@~pi>'.'Pj, (S/S) 01/23/92 7.79E+Ol 5.57E+01 1.01E+02 'gP~z>>~~'"jjQ))y>> 5.80E+Ol,c:;>7;."'.'~5'-'g~'.

(TELE 01/23/92 1. 15E+02 4.90E+01 1.03E+02 "2.80E+00 6.60E+Ol -3.50E&1 02/05/92 9.95E+Ol 5.37E&1 8.22E+O1 -9.20E+00 5.51E+01 1.90E+O1 02/19/92 8.30E+01 1.50E+OI 1.04E+02 -3.40E+00 9.08E+Ol &.20E-OI 03/04/92 1.43E+02 7.09E+01 5.11E+02 3AOE+00 9.30E+Ol -8.80E+00 03/18/92 I A3E+02 7.86E+01 1.27E~ -1.30Et01 9AOE&1 -1.80E+01 04/02/92 1.40E+02 6.16' 1.64E+02 -1.80E+00 1.22E+02 1.20E&1 04/15/92 1.08E+02 2.70E+O1 1.46E+02 9.20E+00 1.31E+02 -5.50E+00 04/29/92 1.47E+02 8.90E&1 2.79E~ -9.70E& I 1.43E+02 6.10E+00 Avcragc 8.07E+Ol. .5.18E+01 2.28E+02 .,1.33E+O1 4.08E+02 4.07E+00 High 1.79E~ 1.27E+02 I.78E&3 9.36E& I 1.84E&3 2.86E+O1 h

2.77E&I 4.50E+00, 2.34E&I -1.30E+O1 3,07E+Ol -3.50EtOI. c

// of Sample , 104 91 , 104 "

39 103  ? 16 1-3

1987-89 ST101 RESULTS 1990-92 ST101 RESULTS Co-60 and Co-58 Thru 12/20/89 Co-60 and Co-58 thru 04/29/92 PICOCURIES/KILOGRAM P ICOCU RIES/KILOGRAM 2000 2000 1740- 1750 1600- 1500 1260 1240 1000 1000 740 74O 500 500 260 250 250 -260 108 7 1088 1080 10Q0 1001 1002 COLLECTION PERIOD COLLECTION PERIOD CO.60 ~ CC.44 CC-40 ~ CO-48

'987-89 ST101 RESULTS 1990-92 ST101 RESULTS Zn-65 thru 12/20/89 Zn-65 thru 04/29/92 PICOCURIES/KILOGRAM PICOCURIES/KILOGRAM 2000 2000 1750 1760-1400 1600 1250 1250 1000- 1000 75O 750 500 500 260 240 lQ 87, 1088 108Q 1000 1001 1002 COLLECTION PERIOD COLLECTION PERIOD ZN 86 ZN.65

~ I. ~ ~

0

.El

1987-89 ST103 RESULTS Cs-137, Cs-134 and I-131 thru 12/20/89 P I COC U R IES/K I LOG RAM 200 176 160 125 100 26

-26

-50 1987 1988 1989 COLLECTION PERIOD CS-137 CS-134 + I-131 1990-92 ST)01 RESULTS Cs-137, Cs-134 and I-131 thru 04/29/92 P I COG UR IES/KILOGRAM 200 175 160 126 100 76 60 26 0

-26

-50 1990 1991 1992 COLLECTION PERIOD CS-137 ~ CS 134 + I-131 1-5

ATTACHMENT2 1992 ST101 SEDIMENT, WATER AND VEGETATION RESULTS

~ ' ~4 4 Al+ ~ g 4 t1 1l,tv 4 *At 2-1

j ~ w s>W 1992 ST101 SEDIMENT RESULTS 1992 ST)0 I SEDIMENT RESUL ACTIVATION PRODUCTS. ACTIVATION PRODUCTS PICOCURIES/KILOGRAM PICOCURIES/KILOGRAM 550 State Investlgstlon Level - 2500 pCI/I Slate Investlgstlon Level - 2500 pCI/I 500 460 300 7?I 400 350 260 300 200  ???>a 260 t ,c';/ >Vra

? ,">c> g$ ',r8 200 V re 150  ?>r I 160 a 5:,':>? r a",

100 I >>' r/i 100 r

>>/.> '

50 ?r;, se i>

?r>>,.

V?? '>>4 ~?2 60 Ã'>V r'>?I 50 . V?

r .5:

)V (>>  ???

r 100 I/23(S/Sl 2/6 3/4 4/2 4/20 6/id 5/3 5/17 7/I I/23(S/3) 2/6 3/4 4/2 4/20 dltd 5/3 6/17 7/I I/23(TEL) 2/10 3/ld 4/165/13 6/27 6/10 5/26 I/23(TEL) 2/10 3I Id 4/16 5/13 6/27 5/10 5/26 COLLECTION PERIOD COLLECTION PERIOD LCD.dg RiQ CO.SS - CO-50 Nota(sat LLD CO-6d Notalnat LLD C'3ZN dd ZN-d6 Notalnat LLD 1992 STION SEDIMENT RESULTS ACTIVATION PRODUCTS PICOCURIE/KILOGRAM 120 State Investlgsllon Level - 2500 pCI/I

'I 10 100 50 70

>av 50 50 ?r

.WV 40 Sv>

rs 30 20 r,'>>

Y?

C':? >>~>>5 ws I

10  :?

i; 1/23(S/SI 2/6 3/4 4/2 4/2Q d/IS 5/3 5/17 7/I I/23(TEL) 2/IQ 3/ld 4/16 6/13 6/27 5/10 d/26 COLLECTION PERIOD LIMN.54 MN-64 Nominal LLD

C t992 ST l01 SEDIMENT RESULTS FISSION PRODUCTS P I COCU RIES%KILOGRAM 180 State Investigation Level - 1000 pCI/I (Ca-137). 2500 pCI/I (Cs-134) 140

?')

(C

)C 120  ?

sc s)

X Y C.

?.

?

100  ?

's

)< V "C

C's s<<

vs 80

a 80 ~C C. Cg 44 .?

L 40 4 C

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cj <<'. s'j C<  ?

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s4 <<C 4 1/23(S/8) 2/6 3/4 4/2 4/29 6/18 8/3 8/17 7/1 1/23(TEL) 2/19 3/18 4/16 5/13 6/27 8/10 8/26 COLLECTION PERIOD EH CS-137 HR CS-134 "-- CS-137 Nominal LLD CS-134 Nominal LLD 1992 ST101 SEDIMENT RESULTS FISSION PRODUCTS P I COCUR IE/KILOGRAM

,250 State Investigation Level - 1000 pCI/I 225 200 C? ")C 175 160

.4)s.

125

<) ss< <.,':s 100 x)

')C )

r)  :!R)

',I'?

75 s'~?"  :"h)

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254, 50

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r,'

~

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1992 GROSS BE IN WATER RESULT FOR ST101 DRAINAGE LAGOON P I COG U R I ES/L IT E R 1200 LOG SCALE OF GROSS BETA IN WATER RESULTS 1100 PICOGURIES/LITEA 9/w.' 10000 7

1000

'+9 v7 f000 900 m

i? <<'r yr9;

..M f 800 loo 700 'VC n

Nomfnof fownr Lfmff ol Doloollon

.c rxf d fo 600 r.

V 2

9 v'

500 2/la 0/fa 4/fe 4/fe a/22 4/22 4/24 e/l e/0 e/4 a/4 4/fo 4/le 0/4 4/2 4/24 4/l4 4/24 0/24 4/00 4/2 4/4 4/ ~ 4/4 4/II 4/11 SAMPLE DATE v" .";

400 300 .p PA

++i'.,K 200 100

'9r'?'/9 'M(:vm:

0 2/19 3/18 4/15 5/13 5/22 5/27 5/29 6/1 6/3 6/5 6/8 6/10 6/12 3/4 4/2 4/29 5/18 5/26 5/28 5/30 6/2 6/4 6/6 6/9 6/11 6/17 SAMPLE DATE

,p4 0

1992 TRITIUM WATER RESULTS FOR ST1Q1 DRAINAGE LAGOON PICOCURIES/LITER {x 1000) 300 LOG SCALE OF TRITIUM IN WATER RESULTS

-275 10000000 00% Ol COC//?20 AOA 8. 2401 ~ 2 250 . A?v 1000000 225 'Ch 100000 r?~88OSO/llh~r~hrOI.OWrrtrlt h r Sr ', ~ ~ '4 41~~

200 10000 175. 1000

?CO?hlhh/ Crhrrr llrhll Ol OOIOCI ?Oh

'?

150 100 r

?

a'g.

10 125 0/10 0/10 4I14 4IIS 4Itt ~ /tt ~ /2 ~ 0/1 SI4 4/t 4/20 0/10 ~ /20 4/20 4/40 ~ It

~ IS 4/4

~ IS

~ /0

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0/0 0/1'1

/lt

~ Ilt SAMPLE DATE 100

C (,,?

75 Cv'C

?'??

50 '~lt 25 2/?.~

0 2/19 3/18 H

4/15 5/13 5/22 5/27 5/29 6/1 6/3 6/5 6/8 6/10 6/12 3/4 4/2 4/29 5/18 5/26 5/28'/30 6/2 6/4 6/6 6/9 6/11 6/17 SAMPLE DATE

1992 MN-54 WATER RESULTS ST101 DRAINAGE LAGOON P I COC U R I ES/L I T E R LOG SCALE OF MN-54 IN WATER RESULTS PICOCUAIES/LITEA

~ OOOOOO 100000 l 004 ol lOCIAtO ADD 0. 1>olt 4 tent 10000

>COC atDWC>DO ltrtt&DWIW>tAco 1000 "Cw. 100 4 ill~ 1llvt ill ~ litt \ oct>

10

>COO>>A\> Ooctck lot 0 DI 0 41>to C

Y, Ic 0.1 I 411 ~ OI 44 ~ Il~ 4 I~

1 I

~ 1 4 4I4 I ~ IO ~ 0/1 I

~ 4 ~ IO 0IO ~ 10I ~ I 14 4/4 AIO ~ IO ~ OIl~ OIO ~ 4IO ~ ~ IOO ~ IO I

~ ~ OI ~ I

~ ~ ~ Ill OI11 C?: SAMPLE DATE

';:,st?

0'ZC,. .

Yog

'W 4

YCI

'C ' 'CCYI>

'DY. C>

Cw

?q

~

Z~'!4-2/19 3/18 4/15 5/13 5/22 5/27 5/29 6/1 6/3 6/5 6/8 6/10 6/12 3/4 4/2 4/29 5/18 5/26 5/28 5/30 6/2'/4 6/6 6/9 6/11 6/17 SAMPLE DATE

3992 CO-60 WATER RESULTS ST101 DRAINAGE LAGOON P I COCO RIES/LITER 140 LOG SCALE OF CO-60 IN WATER RESULTS PICOCURIES/LITER 100000 120 00% o1 rOC/420 APO. B. Trois 2 10000 1 1000 f 100 rr4C rrspor llew Level.Ousrrerlg nvff Blare Invesll ~ rien Lever 100 4 faf j vornrnsl tovrer Llrnff ol Oeteorron 80 r 4

s e C.

Or V 5r

'i 60 Y V

2/1 ~ 2/14 s/14 4/12 4/22 a/22 4/20 4/1 4/2 4/4 4IO 4I10 4/12 s/a e/2 e/2 ~ s/fa s/24 4/24 a/ao a/2 4/s a/s OIO a/11 a/fr SAMPLE DATE 40 20 0

2/19 3/18 4/15 5/13 5/22 5/27 5/2 9 6/1 6/3 6/5 6/8 6/10 6/12 3/4 4/2 4/29 5/18 5/26 5/28 5/30 6/2 6/4 6/6 6/9 6/11 6/17 SAMPLE DATE

1992 ZN-65 I WATER RESULTS ST101 DRAINAGE LAGOON P I COC 0 R I ES/L I T E R 60 1992 ZN-65 IN WATER RESULTS 55 ST101 DRAINAGE LAGOON PICOCURIES/LITER 50 1000000 45 100000 00% ol ICCI A20 AOO. 8. tool ~ 2 10000 40 1000 35 MAC Aooocclocy tovol Occor/OAT Aco.

100 30 101 NOCOIOOI tOWOC 1.IIII/1 01 DOCOCIIOO 25 C C

20 2/10 2/4 0/14 4/1 ~ 4/12 Oltt 4/21 4/2 ~ 0/1 0/4 ~ /4 ~ /4 ~ //0 Oll2 O/2 Ol to ~ I1 ~ 4 /to Ol to 4/40 Olt 0/4 4/4 4/0 4/11 ~ /11 SAMPLE DATE 15 10 C I';X q>p Ctt 'CC pg,:,:

0 AA Co C oC.,

g 5'10

-15 2/19 3/'I 8 4/15 5/13 5/22 5/27 5/2 9 6/1 6/3 6/5 6/8 6/10 6/12 3/4 4/2 4/29 5/18 5/26 5/28 5/30 6/2 6/4 6/6 6/9 6/11 6/17 SAMPLE DATE

~

i

1992 CS-134 WATER RESULTS ST101 DRAINAGE LAGOON P I COC 0 R I ES/L I T E R 12 LOG SCALE OF CS-134 IN WATER RESULTS PICOCURIES/LITER 10- 100000 10000 00% Ol COC/020 OOO 0. jill~ 2 1000

<0

<<0 Io

. C C ".

yS". 100 4 K Aoj0/J L"2 '22<212 <kiP2 < It "N 2.i < 10 ~

4Oaloal LO+o/ 2/all Ol OCICCI/On 5

4 C XM

$ &<~o OI1 ~ 2/1 ~ 1/1 ~ ~ Il2 0/22 0/22 OIO ~ 0/1 0/0 OI ~ ~ I ~ OI/O ~ /12 0/0 C/2 OI2 ~ OIl~ ~ /2 ~ OIOO 0/20 OIO ~ I ~ ~ /0 OI ~ ~ /11 ~ /ll

'og SAMPLE DATE

'wo 4<<~2 .

2

'A'44

, . A:,'

C

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<2

fA 0 '; vo

<<0<<

ej

<4<.

h".

oo .:.

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2/19 3/18 4/15 5/13 5/22 5/27 5/29 6/1 6/3 6/5 6/8 6/10 6/12 3/4 4/2 4/29 5/18 5/26 5/28 5/30 6/2 6/4 6/6 6/9 6/11 6/17 I

SAMPLE DATE

I. l

~!

1992 CS- I37 WATER RESULTS ST101 DRAINAGE LAGOON P I COC 0 R I ES/L I T E R 15 14 LOG SCALE OF CS-137 IN WATER RESULTS 13 C 40004 PICOCURIESILITER

~ Ol Oc COCIO)0 Ooo. fnlo l 12 ~ oooo 0.

l4 00 10 e ~4 ~

thCI OCPPIJ~0 lWclebce Ie.'IP A

.9 ee Hoaloal c~r ecalc 4I otctccloo C

C

~ IN OI) ~ clio OIIO l/el ~ Il~ ~ Ie ~ ln eu OIO onl onl ~ Iee ene OIOO eu illOI ~

~ Io OIO Olo OIO

~ Iso onl

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~

4 SAMPLE DAlE 3

4C.l 2 n)"

, p':,C.

$ w~ cnc)

)MAL' 1 Cv~(,  % Pp OA 8 'N '?v):C

")'x:', .C

. gv>))

'&K

~

$ ~eW: $,'<?~C O'PI ) CC+>

0 ':Y.:.

<!:CC

Q.A

,:~tv'Cv@~

.FPCPC V. NC

).'vw "6

2/19 -

3/18 4/15 5/13 5/22 5/27 5/29 6/1 6/3 6/5 6/8 6/10 6/12 3/4 4/2 4/29 5/18 5/26 5/28 5/30 6/2 6/4 6/6 6/9 6/11 6/17 SAMPLE DATE

1992 I-131 I ATER RESULTS FOR ST101 DRAINAGE LAGOON (GAMMA)

P I COC U R I ES/Ll T E R 24 22 20 18 16 14 12 10--

Nominal Lower Limit of Detection (Gamma Analysis)

...Y "Sj w%/c V'

Q;) )y4+ S<

/~ac 2/19 3/18 4/15 5/13 5/22 5/27 5/29 6/1 6/3 6/5 6/8 6/10 6/12 3/4 4/2 4/29 5/18 5/26 5/28 5/30 6/2 6/4 6/6 6/9 6/11 6/17 SAMPLE DATE

1992 I-131 WATER RESULTS FOR ST101 DRAINAGE LAGOON {RESIN)

P I COCU RIES/LITER 1000 80% of 10CFR App. 8, Table 2 100 10 NRC Reporting Level-Quar terly Avg.

State Investigation Level Nominal Lower Limit of Detection-0.5 pCi/I c~Mi 0.1 W$ $

vs pci$

0.0 1 2/19 3/18 4/15 5/13 5/2 2 5/2 7 5/2 9 6/1 6/3 6/5 6/8 6/10 6/12 3/4 4/2 4/29 5/18 5/26 5/28 5/30 6/2 6/4 6/6 6/9 6/11 6/17 SAMPLE DATE

1992 CE-141 WATER RESULTS ST101 DRAINAGE LAGOON I COCU RIES/LITER 800 750 LOG SCALE OF CE-141 IN WATER RESULTS 700  ?

/ PICOCURIES/LITER v?

40% ol tOCFA20 APt?. 8, TOt?ta 2 650 w

?'5 10000 ~

600

r,' 1000 550

b'av Stats tnvostt piton Lowt 500 100 450 r',?A

10 t ttomlnol Lowor Llmlt at Dotoctton 400 1

5

'..?'A'00000 1 s

?'?

?

350 1?

?.

??

01 n 300 :jYjc X

?I

?

250 2/10 3/14 4ltdd ltd 5/22 5/22 5/20 4/1 4/3 4/5 4I4 4/10 4/12 3/4 4/2 4/22 4/14 5/24 d/24 d/30 4/2 4/4 4/4 4/4 4/11 4/t/

200  ??,'.>>

'4 SAMPLE DATE 150 :1 .0:

100 50 0

-50 2/19 3/18 4/15 5/13 5/22 5/27 5/29 6/1 6/3 6/5

~l~l 6/8 6/10 6/12 3/4 4/2 4/29 5/18 5/26 5/28 5/30 6/2 6/4 6/6 6/9 6/11 6/17 SAMPLE DATE

1992 ST101 QUARTERLY GAMMAIN VEGETATION RESULTS pCi/kg DATE CS-137 CS-134 CO-60 CO-58 ZN-65 MN-54 I-131 CE-141 CE-144 03/19/92 1.6E+01 -2.6E<00 1.7E+01 -7.2'0 4.3E+01 1.7E+01 5.9E-01 -1.3Ew01 -3.1E+01 06/17/92 9.4E+Ol 4.6E+01 2.6E+01 -1.1E-OI $.7E&1 3.2E&1 2.8E+00 6.1E+00 -5.1E+00 AVERAGE 5.5E+01 2.2E+01 2.2E+01 -9.7E+00 5.0E+01 2.5Et01 1.7E+00 -3.5E+00 -1.8E+01 HIGH 9.4E+01 4.6E+Ol 2.6E+01 -1.1E-01 5.7E+01 3.2E<01 2.8E+00 6.1E+00 -5.1E+00 LOW 1.6E+01 -2.6E+00 1.7E+01 -7.2E+00 4.3E+01 1.7E+01 5.9E-01 -1.3E+01 -3. IE<01

// OF SAMPLES NOTE: Larger, darker print indicates result above detection level.

T101 QUARTERLY VEGETATION SAMPLE 1992 RESULTS ST)01 QUARTERLY VEGETATION S ~ LE 1992 RESULTS PICOCURIES/KILOGRAM P ICOCURIES/KILOGRAM 120 30 110 2d.3 100 03.6 26 60 tlomfnal Lower Llmlf of Oofecf lan 70- 20 17 50 60 46.5 40 10

-15 = ttcmlnel Lpwer Llmll Ol OefeCIIOn 20 10

-10 -2.d, 20 3/ le 5/$ 7 0/15 12/15 3/10 6/17 0/16 12/15 SAMPLE DATE SAMPLE DATE E3 Cs-$ 37 C3 Cs-134 E3Co do STION QUARTERLY VEGETATION SAMPLE 1992 RESULTS PICOCURIES/KILOGRAM 60 46 40 ttomfnal Lower Llmll ol Oetecllon 30 20 16 10-5.1

-6

-10

$ 6 13 20 3/10 6/17 6/16 12/15 SAMPLE DATE EDGE 141

101 QUARTERLY VEGETATION SAMPLE ST101 QUARTERLY VEGETATION S E 1992 RESULTS 1992 RESULTS PICOCURIES/KILOGRAM P ICOCURIES/KILOGRAM 40 60 38 62.4 38 66 34 32.2 tlomlnal Lower Llmlt ol Detection 32 60 30 46 43 28 25 40 24-22 tlomlnal Lower Llmtt ol Ootectlon 20 30 18 26 16 14 20 12 16- 10 8

10- 4 4

2 0

3/18 5/17 8/16 12/15 3/te 8/17 8/15 12/15 SAMPLE DATE SAMPLE DATE E3Zn-46 C3 at n-64 ST101 QUARTERLY VEGETATION SAMPLE 1992 RESULTS PICOCURIES/KILOGRAM 60 46 40 ttomlnaLLotreLLtmtLot.Detect to 36-30 2d 20 16 10 2.8 0.6tt 3/18 8/ tl 8/td 12/18 SAMPLE DATE E3I-131

ATTACHMENT3 SECOND QUARTER 1992 ST101 WATER SAMPLE RESULTS AND % MPC LISTING 3-1

L  %%"Vg'~

0 P,

IV Cl~)$

"4 ~

n

3>>%@4?c cog(x~<<~?x wx(,Ac.S)cx.<<3'?x . c<<';4NN 1992 STIOI IH WATER RESULTS IPCI/I) <?'"y'.4+$ 3(<<s.'.(":NK'%MC?/y<<cFk'c's?CAzs?"y)"4NA!>y(3'(>5 DATE Cs-137 Cs-134 Co-60 Co-5$ Zn-65 1-131 Cc-141 Cc-144 Sb-124 Sb-125 I-131 R H-3 Os/02/92 1.7E+00 1.28+00 -1.6E+00 -2.3E+00 -2.58&1 -2.7E+00 -5.68<1 -2.$ 8+00 04/ls/92 2.6MO 1.48+00 -1.38)M 8.98&1 1.3E+00 -2.98)M 3A 8+00 1.78+00 c(,c'.?<<)1 y(hs 04/29/92 2.88~ 4.BENI 4.98&1 -1.78&1 2.78+00 I.28~ 1.268+01 -7.68& 1 -3.S 8<00 y <?>>() <<h ) cyhy>>h,c??3) c 05/13/92 5.69E+00 4.88+00 1.258+02 3.48)00 5.308+01 5.798)M 2.11E+01 7.078<02 I. I E+Ol I. I5E+0 I 2.08E+O1 $ .38)M 2.78)05 05/18/92 3.BE+00 -3.0M)1 1.668<01 -4.28-01 1.918&1 2.2E+00 1.2E+00 1.9E+00 -I.SE+Ol 1.68&1 1.2E+05 05/22/92 1.78+00 4.68&1 4.7E+00 -7.38-02 1.6E+00 S.0 8&1 1.6E+00 3.0MB B.OMO -1.08<1 g'>//?(S))S>>j'c 05/26/92 3.2E+00 1.2E+00 1.28+00 8.98&1 9.38-01 1.SEMI 3.58+00 2.88)M -3.38+M -1.88~ 2.18)02 05/27/92 2.28&1 -1.68+00 .50E-OI 4.78& 1 1.98+00 1.48+00 -9.58<1 3.18+00 -$ .18+00 1.88+00 1.38)02 osn8/92 1.2E+00 1.58)M 6.28& I -5.4802 -1.2E+00 1.38<M 4.4E+M 6.58~ -8.88)M 6.88%1 1.98<02 8.38+00 4.$ E-OI I.58<M -1.8841 O.0E+00 2.98+00 -6.4E+00 -4.48-02 5.78)OI 05/30/92 I.IE~ 1.18+00 -3.48&1 6.65M'5.88-01 2.9E+Po 6.78&1 I.OE)M 6.4E-OI -3.48)M ~'c( c'3?>>y: x<3:>r>(X~S>".Q 2.6M)I I.BE+02 06/01/92 I.6MB -1.48<M 4.0E+00 I. I E+00 4.48&1 I.58+00 8.18&1 -2.88+00 -6.2E+00 7.78-02 3.48+02 06/02/92 2.48+00 5.48&1 I.OE+00 -1.88-01 3.08+CO -2.78<1 -2.2E+00 -6.58<1 -5.4E+00 -2.28-02 1.38)02 06/03/92 8.48&1 1.4E+00 -IAE+00 -5.2&)l 0.08<M -3.98&1 -1.98~ -1.18)OI -5.98~ 1.18+02 06/N/92 2.38~ 2.SEMI 1.28~ 5.2E-OI -3.58~ 8.38&1 -8.08~ 4.08&1 -1.18<01 -2.68% -9.38+01 06/OS/92 I.BE+00 0.08+00 6.28& 1 -I.BE+00 0.08+00 -9.08<1 1.28+00 H.5E+00 -8.28<M ;. ~: S('; yc5t k )'~y'.,'>>si 9.38~ -1.88<01 06/06/92 2.1E+00 2.28&1 4.08+00 0.08<M -1.78+00 -6.08<1 5.38&1 -1.98+M -3.4E+00 x?.xi)S??<<33?C 1.6E+02 3.58&1 0,08+00 I.OEOI -1.4E-O I 2.9E+00 3.98&1 -1.2E+00 -1.28& -2.28)01 44<<';;c',".>V.", 7.78)OI 06/09/92 1.88<1 2.4E-OI -I. I 8~ -9.88<1 -9.2M I.SEMI -1.4&)I -3.08+00 -7.78)M -2.08%1 1.18+02 06/10/92 1.88+00 5.98&1 2.98&1 -1.08-01 2.18~ -7.48&1 1.48+00 -1.38&1 3.0E+00 c (<<g(((c) ' )g'xi -1.68&1 I A8+02 06/11/92 -8.98&1 -4.08)M 1.4E+00 -I. IE+00 -1.88+00 1.38+00 1.68KO I. I E+00 -9.78<M >s.<<?)'(4x>> x3%('>>s). -1.48-01 I.0E+02 3.0E+00 1.78<M 2.2E+00 -1.4E+M 3.88+00 6.78&1 -9.7&)l -3.58<M -I.OMO -9.68~ 2.2E+02 06/17/92 -2.5E+00 -I.48<M'6.6&)l -2.3&)I -1.3E+01 -3.28NS -2.28<1 3.38+00 4.58)M ,'::()'.'x", o .>>?c';.I ( "?,,': I.78&1 3.98<03 AVERAGE I.OBEm 7.028-01 7.528iCO I.928&1 3.16E+00 5.748&1 1.708+00 3.088)pl .608)00 I. ISE+Ol 2.088)pl S.938&1 2.08E+04 HIGH 5.698)M 8.30E+00 1.25E+02 3.40E+M 5.30E+Ol 5.798)M 2.11E+Ol 7.078+02 1. IOE)01 I. ISE+Ol 2.088<01 8.30E+00 2.708)05 LOW .708+M .OOPS I. IOE)M 1.808kB I.30M)I 3.208<00 508)M 2.208<01 1.158+01 2.08E+01 2.CORI 9.308)01

// SAMPLES 18 KV('a@V (<@M@":< 3.'"'-. R%%))>>k@X';%SR@ Ny('c%)%'?Nh?? OX)(N33+<<c?x'c)mk? h <<3'?)C)S'>>(k4%N@%<<)I DATE Cs-137 Cs-134 Gr60 Co-5$ 1-131 Cc-141 Cc-144 Sb-124 Sb-125 I-131 R H-3 0.0189% 0.0024% 4;-'y::.":~.8'x)) (>N~yY&5 WAS:) i)%s %As>>k?'.3?~) INKS:f~ a,'~?cy~: , v"~43i>>?<<>> (sv)?s'x>>c'?>'?y 04/15/92 0.0105% 0.0289% 0.0028% y y,> (?>?3<<g. h 0.0009% 0.0013% s?y <?'?'>>is'9 0.0038% 0.0170% ,c

' xc';3'S> (."3oh(1>>?s 04/29/92 0.0140% 0.0053% 0.0010% 0.0027% 0.0012% 4.2000% >?.5 (c?(Q:$ $ c?( 'c)44~<~'>> y>i('cV;,

0.0533%

c>yc'5/13/92 0.0285% 0.2500% 0.0034% 0.0530% 0.0058% 7.0333% 0.7856% 0.1100% 0.0575% 0.0208% 2.7667% 9.0000%

05/18l92 0.0190% 0.0332% 0.0191% O.C022% OAOM% 0.0021% . 's*.'. >>?y" O.OS 33% 4.0000%

05/22/92 0.0051% 0.0%4% ,'"5 0.0016% 0.0005% 0.5333% 0.0033% O.OBM% "x

+(hc'.M70%

0.0085'%sn6/92 o.o160% 0.0133% 0.0024% 0.0009% 0.0009% O.CP02% 1.1667% 0.0031%; .."zyc 05m/92 O.OO11% 0.0005% 0.0019% 00014% ~? >'..-."' "3? '.0034% (:(x"," >>>:(?P.(,.6<<>> 0.6X0% 0.0043%

05/28/92 0.0060% 0.0167% O.M 12% 0.0013% 1.4667% 0.0001% >).." 0.2267% 0.0063%

p5n9/92 .hxhC. y(h 0.0922% 0.0133% 0.0005% 0.001S% 0.0032% x '('(i 0.0019%

05/30/92 0.0055% <'.4-'~x3>>'>'x@ 0.0022% y".sx>c)<<<jp M29% 0.0007% 0.3333% 0.0007% h- A<<V:: hx:Si..:.S>c 0.0867% 0.0060%

06/01/92 0,0080% '.?)r:y(3'(? <k 0.0080% 0.0011% 0.0004% 0.0015% 0.2700% 0.0257% 0.0113%

06/02/92 0.0120% 0.0060% 0.0020% >'y?(<i.!i",;:; ~ 0.0030% I??>3~Via4 SS"'(x?x?(d: 0.0043%

06/03/92:"'?'<<(<"".'s(c 0.0093% 0.0028% c ."..y" 3 C .3 .  ??(>3.gk>>3 :s4>>3)?,4s:,."c',; 0.0037%

"'"<'6/04/92 0.0115% 0.0028% 0.0024% 0 0005% "((>C>>?3(4'Bs O.OCP8% 's(<'hc~(.""sr)?( 0.0004%: ." ( ?x)'; 3 << ~':,'><"??>>c "yx)<<')5? <'!2 06/05/92 0.0090% 0 0012% $ s)h<<<+4 0.40M% 0 0310%  ?: IS s;:.IS<.>>;g 06/06/92 Fx7??klan!.",.  ;'y cs)h(y',";K 0.0105% 0.0024% 0.0080% r>c '- k~".VA~ 'sc'c k>>>>s'c/('.>> ::s>(?)?h8 %i 0.1767% 0.0053%

06/08/92 0.0017% '..V>,<"".'.0029% 0.0004% Fx ..".>><<?(Fc 0.0026%

06/09/92 0.0009% 0.0027% ',";:;s?. sxP; 0.0002% x ic,':,<i'??h(33 )(y> <Ic(>go:<?s(( 0.0037%

',1>>hy'v 06/Ip/92 0.0090% 0.0066% 0.0006% .xiV'(<<(?P>3( 0 4667% ".'.'h;(. 0.0300% ssc hyy'j h ( 0.0047%

06/I I/92:(xc) x?":x-'3 O.M28% O.CO13% 0.5333% 0.0012% k'yh'<<xhxy'>>y'( 0.0033%

06/12/92 0.0150% 0.0189% 0.0044% :s?>"';1!y!94 0.0038% 0.0007% (<W<B?xB?x?c x '>>>>c 0.0073%

".<<'.0037%

06/17/92 ('S"'!:~ '3<<i()? / "3?y'<<cc.<<.'~(,,' x:?x (< '",sx(?yh(Vy(. 13 '??ss)(3'."sh>>>(4 0.0450% 0.0567% 0.1300%

• Arithmetic average, not time-weighted.

3-2

ATTACHMENT4 MAY. - JULY 1992 ST101 SEDIMENT RESULTS 4-1

I'g I

)(,

"'l

1992 ST101 GAMMAIN SEDIMENT RESULTS pCi/kg DATE CS-137 CS-134 CO-60 CO-58 ZN-65 MN-54 I-131 CE-141 CE-144 EU-152 05/13/92 $.98+01 4.7E+01 1.6E&2 5.6E+00 5.2E+01 3.5E+01 O.OE+00 l. 18402 2.5E+00 05/I &/92 1.38+02 $.7E1 4.9E&2 3.8E+00 2.$E&2 6.7E&l 9.4E~OO 1.9E&2 -4.2E+01 05/27/92 4.3E~OI 3.9E+01 9.68+01 -I. IE+01 3.9E+01 1.6E+01 I.SEWOI 3.6EIOI 1.3E+01 06/03/92 1.28%2 7.38+01 $.0E+02 1.9E+01 2.98+02 7.48+01 1.9E+01 2. 1E+02 -1.5E+01 06/10/92 1.18<02 4.9E+01 3.BE+02 5.5E-OI 2.3E+02 1.18%2 -1.2E+01 1.38~02 -I. IE+02 06/17/92 1.48-/02 7.4E<01 3.3E&2 1.4E+00 2.$8&2 7.38v01 8.9E-OI 8.9E+01 -8.3EWOI 1.3E+OI 06/25/92 8.98+01 6.3E<01 2.38&2 -5.2E+00 7.7E+01 4.1E+Ol 3.1E+01 I.SE+Ol -1.3E+02 07/01/92 1.1E+02 7.68+01 3. 7E&2 1.2E+01 2.1E+02 4.2E~OI 5.2E+00 1.08&2 4.3E+00 AVERAGE I.OE+02 6.0E+01 3.2E+02 3.3E+00 1.8E+02 5.7E+01 8.9E+00 I. IE+02 -4.5E+01 1.3E+01 IIIGII 1.4E002 7.6E<01 5.0E+02 1.9E<01 2.9E+02 I. IE+02 3.1E+01 2.1E+02 1.3E<OI 1.3E+01 LOW 4.3E+01 3.9E+01 9.6Ew01 -I. I E+Ol 3.9E+01 1.6E+01 -1.2E+01 I.SE+01 -1.3E+02 1.3E+01

// SAMPLES 8.0E+00 S.OE+00 S.OE+00 8.0E+00 8.0E+00 8.0E+00 8.0E+00 S.OE+00 S.OE<00 I.OE+00 NOTE: Larger, darker print indicates result above detection level.

1992 ST)01 SEDIMENT RESULTS 1992 ST)01 SEDIMENT RESU ACTIVATION PRODUCTS ACTIVATION PRODUCTS PICOCURIES/KILOGRAM PICOCURIES/KILOGRAM 650 360 Ststo Inveatlgstlon Level - 2600 pCI/I Slate Invest tpst ton Level - 2500 PCI/I 500 C

'C X 460 ..C?

'i 300 400 350 C 6 260 N.,;% l? %Q Sg?.

QY

>Y>t 300 200 260  ?>>C.:,.>'.

'?I '>Yc> Y 200 k 4, g .'~?C r'.Yt

%V..'Y'C? ~

cce 'Y 150 150 Y">,

p Y.

"'?'t 100 'x? YvC C'?',

Cg>

100

1?Sejm ,C C-

';'.:."c:,:.'c?6 I et W 44/  ; Yc>ac C C..;

.CXYCY Y' 50 s ~/ Y> X?.;Y.:;

50 '4jI 100 6/13 d/16 6/27 d/3 6/10 0/17 d/25 7/I 6/13 6/16 d/27 6/3 6/10 6/17 6/26 7/I COLLECTION PERIOD COLLECTION P ERIOD EICO.50 Ial CO-56 -- CO-50 Notalnat LLD CO-dd Hontlnal LLD E'3 ZN-56 ZN.66 Hotalnal LLD 1992 ST)01 SEDIMENT RESULTS ACTIVATION PRODUCTS PICOCURIES/KILOGRAM 120 State Investlpstlon Level - 2500 PCI/I 110 100 60 70 50 60

?6 >Z>Kr. >

40

~ c>'Yl c:I 30 20 10 "ca c 6/13 6/15 5/27 6/3 6/10 6/17 6/25 7/I COLLECTION PERIOD E3 MH-54 MN.64 Notalnal LLD

i P 1992 ST101 SEDIMENT RESULTS FISSION PRODUCTS P I COG U RI ESXKI LOG RAM 160 State Investigation Level - 1000 pCI/I (Cs-137), 2500 pCI/I (Cs-134) 140

'??

120 "< v E..":s>

..s?'P 100 p$

5?v,js j  ;:(+x'?v.',S'

,s"

;

?Ck" 80

<.;?:,v?,

$x"vis s..;Ias v >(~v?>,"..;sk>>

ISO  ?> .<.

'4?>:v.

Is(P( 4h(

?,":/4

>:.Svg 40 j(.<?,?

20 y)g ': (<v .>>??;~?

???I<.

>>Sv> Y<.y ., ,5r'.  ?::t, 0

6/13 6/18 6/27 8/3 8/10 8/17 8/26 7/1 COLLECTION PERIOD E3 CS-137 lEW CS-134 --- CS-137 Nominal LLD CS-134 Nominal I.LD 1992 ST101 SEDIMENT RESULTS FISSION PRODUCTS P I COG UR IES/KILOGRAM 260 State Investigation Level - 2500 pCI/I 225

'"8::

200 175 160 125 100 76

'4 >(r'.s>>'s 50

'<?><<> m 26 0

-25 5/13 I

~

6/18 6/27, i

6/3 '/10 6/17 Ia/25 7/1 COLLECTION P ERIOD E3 CE-141 "CE-141 Nominal LLD 4-4

ATTACHMENT5 ST101 MAY 22 SPECIAL STUDY RESULTS 5-1

MAY 22 STORM DRAIN POND SEDIMENT SAMPLE RESULTS (pCi/kg)

Radionuclide Concentrations Sam le cobalt-60 200 Location A (near pipe) 18,000% B '(mid channel) 25,400% C (mouth of channel) 483 D (west side of pond) 935 E (north side of pond) 1920 F (east side of pond) zinc-65 184 Location A (near pipe) 4650~> B (mid channel) 2870@ C (mouth of channel) 150 D (west side of pond) 130 E (north side of pond) 300 F (east side of yond) cesium-134 64 Location A (near pipe) 1140 B (mid channel) 737 C (mouth of channel) 81 D (west side of pond) 98 E (north side of pond) 202 F (east side of pond) cesium-137 94 Location A (near pipe) 2900"' ff B (mid channel) ff 2500@ C (mouth of channel) ff 270 D (west side of pond) ff 275 E (north side of pond) ff 500 F (east side of pond) cerium-141 144 Location A (near pipe) ff 3474 B (mid channel) ff 1390 C (mouth of channel) ff 67 D (west side of pond) manganese-54 670 Location B (mid channel) ff 448 C (mouth of channel)

(1) Sketch of sample locations on the following page oi this attachment.

(2) Exceed the DOH investigation levels of 1000 pCi/kg for cesium-137 and 2500 pCi/kg for other radionuclides.

5-2

ST101D ST101A ST1 018 ST101E ST 1,01C ST101P ST101 GROSS BETA IN WATER RESULTS ST101 TRITIUM IN WATER RESULTS SPECIAL SAMPLE 5/22/92 SPECIAL SAMPLE 5/22/92 PICOCURIES/LITER PICOCURIES/LITER

~ 400 4000 to OOOO 14 4000 I~

4400 I~

4000 4400 10 4000 1400

'?; troiaihot co r llnH ol Dotter\on 1000 400 lltotl tO XO'tlt Ax:x."Cr '~~ Hololhol conor ol PotocttonIICC paEI 4110 IA 41101 ~ OUOIC 411014 ~ 1 101A 4'11010 011010 ~ I tote STATION STATION ST101 CS-137 8 CS-134 IN WATER RESULTS ST101 CE-141 IN WATER RESULTS SPECIAL SAMPLE 5/22/92 SPECIAL SAMPLE 5/22/92 PICOCURIES/LITER PICOCURIES/LITER Nero thol to>>or~rrtrol} hl Dot ot tron

~ ~

NOrolnol towor urott ol Dotoaton 10 0

4 4

~ 110 I A ~ 1101 ~ ~ 'I I 0 IC ~ I tote STATION 41101* 41101 ~ 4 NO Ic C3CO 141 IS)et 141 STATION

l h

0 C'

ST101D ST101A ST1013 ST101E ST101C ST101F ST101 ZN-65 IN WATER RESULTS ST1011-131 IN WATER RESULTS SPECIAL SAMPLE 5/22/92 SPECIAL SAMPLE 5/22/92 PICOCURIES/LITER PICOCURIES/LITER

~ .0 TA Nhalha lhwhf lOCII Ol DCICCIICh 10 Nhhlhhl lhwCT llall Of DCICCIIOh 1.0

~A

~ .0

~ .4

~A 4A 4.0 OA 4.0 tA 4.0 IA 'ww 1.0 c 'rk.:.,:O'P Yr 0.4 0.0

'.w hxc:wth 0.4 1.0 4110 IA 41101 ~ ~ 11010 4 1 IO It O'I 10 IA 4T I 014 OUOID ~ 'I I0 It STATION STATION ST101 GO-60 IN WATER RESULTS ST101 MN-54 IN WATER RESULTS SPECIAL SAMPLE 5/22/92 SPECIAL SAMPLE 5/22/92 PICOCURIES/LITER PICOCURIES/LITER

~ .0 4.0

~ .4 CA Nhalnll lawll Ilail Ol DCICCIIOn Ncalhll Iowof ital ol DOIOCIIOh 1

40 4.0 4A 4.4 4.0

4. ~ tA 4.0 g;. ~,Icl;$ ; t.O tA IA 1.0 1.0 IA OA AX LXC> k.c'.

1.0 0.0 X4'> 'c-.","..",

0.4 OA hw odAO 0.0 IA

~I 1 CIA ~ 11010 ~ 11010 411014 41'IOIA 411014 411010 41 IOII STATION STATION

k l 992 ST101 GAMMAIN SPECIAL SEDIMENT SAMPLE RESULTS pCi/kg DATE LOCATION CS-137 ~

CS-134 CO-60 CO-58 ZN-65 MN-54 I-131 CE-141 CE-144 EU-152 05/22/92 ST101A 9.4E&1 6.4E&1 2.0B+02 1.$E&1 1.8B+02 2.3E+01 5.4E+00 1.4E+02 -5.4E~OI -9.2E~00 05/22/92 STIOIB 2.9E<3 I. 1E/03 1.9E+04 5.8E401 4.7E+03 6.7E+02 7.2E+02 3.7&03 6.6E<01 1.5E+02 05/22/92 ST101C 2.$E<03 7.4E+02 2.$E+04 2.1E+00 2.9E+03 4.$B+02 1.3E+02 1.4E+03 1.5E+02 -3.2E<02 05/22/92 ST101D 2.7E+02 8.1E&1 4.8B+02 -6.8E~00 1.$E+02 4.2E<00 -7.2E<00 6.7E&1 -5.0Ew01 -1.6Et01 05/22/92 ST101E 2.8&02 9.8E+01 9.4E+02 6.3E<00 1.3B+02 1.6E+01 -9.2E+00 3.1E+01 -3.4E401 3.1E~OI 05/22/92 ST101F $.0E+02 2.0E&2 1.9E&3 -2.0E~00 3.0E+02 5. I Et01 4.2E<00 9.9E&1 -5.6E<01 2.4E<01 05/28/92 MID-POND 4.0Ev01 3.3E+01 1.6E&2 -1.0E+01 2.4E+01 6.8E+00 7.5E+00 2.2E+01 -1.4E002 AVERAGE 9.4E<02 3.4E+02 6.8E+03 8.9E+00 1.2E+03 1.7E<02 1.2E+02 7.8E+02 -1.7E+01 -2.3Ew01 HIGII 2.9E403 1.1E+03 2.5E+04 5.8E+01 4.7E+03 6.7E+02 7.2E+02 3.7E+03 1.5E402 1.5E+02 LOW 4.0EWOI 3.3E401 1.6E+02 -1.0E+01 2.4E+01 4.2E~00 -9.2E+00 2.2E+01 -1.4E<02 -3.2E<02 i/ SAMPLES 7.0Ew00 7.0E+00 7.0E+00 7.0E~00 7.0E+00 7.0E+00 7.0E+00 7.0E+00 7.0E>00 6.0E<00 NOTE: Larger, darker print indicates result above detection level.

I I 992 ST101 SPECIAL SEDIMENT RESULT 1992 ST101 SPECIAL SEDIMENT LTS=

SAMPLES TAKEN 5/22/92 SAMPLES TAKEN 5/22/92 PICOCURIES/LITER PICOCURIES/KILOGRAM 30000 6000 27600 4600 26000 4000 22600 3500 20000 17500 3000 Stele Invest tget ton Level 15000 2600 A(y( iikPV, OP . +

12500 2000 10000 1500 :X%y,'v'PCWP+r 7600 1000 6000 Slete Invesllgallon Level 500 2600

,.vce ISSy STIOIA - 8T1018 87101C 871010 87101E ST 10 IF 87101A ST1018 3710 IC ST I SIP ST101E 8T101F STATION STATION E3CO-50 E3ZN-65 1992 ST101 SPECIAL SEDIMENT RESULTS SAMPLES TAKEN 5/22/92 PICOCURIES/KILOGRAM 3000 2760 Slste Investlgstlon Level 2500 2250 2000 1750 1600 1260 1000 760 600

';Is sg'.j." g:

260 ST 10 IA ST10'IS ST I 0 10 ST1010 ST10'IE STIOIF STATION E3 LIN-54

I r (k l(

am

1992 ST101 SPECIAL SEDIMENT RESULTS SAMPLES TAKEN 5/22/92 3000 P I COCU RIES/KILOGRAM 2760 2600 2250 2000 1750 g;iAP 1600

."P'qa.'""'g 1260 State Investlgat Ion Level (Cs-137) 1000 760  :

g).

600 260

(?h '

. C?:C'. ,'v:

0 ST101A ST101B ST101C ST101D ST101E ST101F STATION E'2 CS-137 C3 CS-134 i992 ST i01 SPECIAL SEDIMENT RESULTS SAMPLES TAKEN 5/22/92 P ICOCUR IES/KILOGRAM 4000 3500 3000 State Investigation Level 2600 2000 1600 1000 600 0

ST101A ST101B, i -

ST101C ~ ST101D ST101E ST101F STATION C3 CE-141 5-7

GAMMAIN SPECIAL 05/22/92 VEGETATION SAMPLE RESULTS pCi/kg LOCATION CS-137 CO-58 CO-60 MN-54 CS-134 CE-141 I-131 ZN"65 CE-144 ST1018 1.3E+01 3.4E+00 1.2E+01 9.6E+00 9.1E+00 1.2E+01 -1.2E+00 4.1E+00 -2.1Ew01 ST101E 8.3E<00 1.5E+00 -3.6E+00 1.7E+01 -2.1E+00 6.5E-01 2.4E+00 2.8Ew01 -5.4E+01 AVERAGE 1.1E+01 2.5E+00 4.2E+00 1.3E+01 3.5E+00 5.7E+00 6.0E-01 1.6E+01 -3.8E+01 HIGH 1.3E+01 3.4E+00 1.2E+01 1.7E+01 9.1Et00 1.2E<01 2.4E+00 2.8E+01 -2.1E+01 LOW 8.3E+00 1.5E+00 -3.6E+00 9.6E+00 -2.1E+00 -6.5E-01 -1.2E+00 4.1E+00 -5.4E+01

//OE SAMPLES OO

l,p, yt P'

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ST101 SPECIAL VEGETATION SAMPLES SAMPLES TAKEN 5/22/92 ST101 SPECIAL VEGETATION SA SAMPLES TAKEN 5/22/92

~ S PICOCURIES/KILOGRAM PICOCURIES/KILOGRAM 24 24 22- Nominal Lower Level ol Oelecllon 22 20- 20 Ncmlnsl Liower l,evel ol Oyleclldn 14 10 10 10 14 14 12 12- 12 10 10 d.3 2 -2 2.1

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-4 -e 871018 87101E 071018 ST101E STATION STATION E3CS 137 KBCS 134 RICO de ST101 SPECIAL VEGETATION SAMPLES SAMPLES TAKEN 5/22/92 P ICOCURIES/KILOGRAM 34 32 Nomlnel Lower Level ol OetecNon 30 20-20 24 22 20 18 10 14 12 12 10 0

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-0 ST1018 0'7101E STATION E3 CE-141

T101 SPECIAL VEGETATION SAMPLES ST101 SPECIAL VEGETATION SA S SAMPLES TAKEN 5/22/92 SAMPLES TAKEN 5/22/92 PICOCURIES/KILOGRAM PICOCURIES/KILOGRAM 65 22 50- Nomlnel Lower Leyol ol Oelecllon Nomlnel l.ower Level of Oelecllon 20 46 18 40- 18 14 28 12 26 10 8.8 20 16 8-4.1

. BT1018 ST101E 871018 ST 101E STATION STATION E3 ZN-55 El MN.64 ST101 SPECIAL VEGETATION SAMPLES SAMPLES TAKEN 5/22/92 P ICOCURIES/KILOGRAM 46 Nomlnel Lower Level ol Oolocllon 40 30 26 20-15 10 5

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- .2 ST1018 ST101E STATION C31-131

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