Text

Annual Radiological Environmental Operating Report, Appendix D and E, Pages D-101 Through E-3
	ML031260606
Person / Time
Site:	Cook
Issue date:	04/30/2003
From:	Jack Giessner; Indiana Michigan Power Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	AEP:NRC:3691-03
	Download: ML031260606 (153)
	v • d • e

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR U2037-02 23 Cs-137 2.10E+OO l.90E+00 6.30E+O0 MR L3037-02 23 Fe-59 6.60E+00 6.40E+00 2.20E+01 MR L3037-02 23 1-131 -6.00E-02 1.70E-01 8.10E-OI MR L3037-02 23 K-40 1.72E+03 7.40E+01 9.30E+OI MR L3037-02 23 La-140 -7.OOE-01 3.90E+00 I.SOE+0I MR L3037-02 23 Mn-54 -1.50E+00 1.70E+00 6.30E+O0 MR L3037-02 23 Nb-95 -6.00E-01 2.OOE+00 7.40E+00 MR L3037-02 23 Ru-103 -8.OOE-OI 1.90E+00 6.70E+00 MR L3037-02 23 Ru-106 -I.OOE+OI 1.70E+01 6.20E+0I MR L3037-02 23 Sb-124 5.70E+00 3.90E+00 1.30E+OI MR L3037-02 23 Sb-125 2.40E+00 4.00E+00 1.40E+OI MR 13037-02 23 Se-75 -I.IOE+O0 2.10E+00 7.30E+O0 MR 13037-02 23 Zn-65 -5.80E+00 4.80E+00 1.80E+OI MR L3037-02 23 Zr-95 -4.30E+00 3.OOE+00 1.20E+0O SF L3037-03 23 AcTh-228 -5.50E+00 5.20E+00 I.90E+0O SF L3037-03 23 Ag-108m 6.OOE-01 I.OOE+O0 3.50E1+O0 SF L3037-03 23 Ag- lOim -I.OOE+O0 1.80E+00 6.60E+O0 SF L3037-03 23 Ba-140 2.40E+00 2.IOE+00 7.20E+00 SF L3037-03 23 Be-7 I.OOE+0O 1.20E+01 4.00E+0O SF L3037-03 23 Ce-141 3.70E+00 2.00Ei+00 6.40E+00 SF L3037-03 23 Ce-144 1.30E+00 7.IOE+00 2.40E+01 SF L3037-03 23 Co-57 8.90E-01 9.80E-01 3.30E+00 SF L3037-03 23 Co-58 -2.00E-01 1.30E+00 4.60E+00 SF L3037-03 23 Co-60 1.30E+00 1.60E+00 5.50E+00 SF L3037-03 23 Cr-51 -1.40E+01 1.40E+01 4.90E+01 SF L3037-03 23 Cs-134 -2.00E-01 1.30E+00 4.50E+00 SF L3037-03 23 Cs-137 2.OOE+00 1.40E+00 4.70E+00 SF L3037-03 23 Fe-59 4.60E+00 4.20E+00 1.40E+0I SF L3037-03 23 1-131 -6.00E-02 I.50E-0I 8.10E-0O SF L3037-03 23 K-40 1.33E+03 5.10E+01 6.50E+01 SF L3037-03 23 La-140 2.70E+00 2.40E+00 8.30E+00 SF L3037-03 23 Mn-54 O.OOE+00 1.40E+00 4.80E+00 SF L3037-03 23 Nb-95 -I.OOE-OI 1.70E+00 5.90E+00 SF L3037-03 23 Ru-103 -2.00E-01 1.50E+00 5.30E+00 SF U3037-03 23 Ru-106 -3.OOE+00 1.30E+01 4.60E+01 SF L3037-03 23 Sb-124 -1.40E+00 2.90E+00 I.IOE+0I SF L3037-03 23 Sb-125 -2.20E+00 3.30E+00 1.20E+0O SF L3037-03 23 Se-75 -2.00E-01 1.70E+00 5.90E+00 SF L3037-03 23 Zn-65 -5.OOE+00 3.30E+00 1.20E+0I SF L3037-03 23 Zr-95 -4.OOE-01 2.30E+00 8.20E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-101

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LF L3037-04 23 AcTh-228 -1.IO0+00 5.20E+00 1.80E+0O LF L3037-04 23 Ag-108m -I.OOE+00 1.E10+00 4.00E+00 LF L3037-04 23 Ag-I lOm -1.70E+00 2.10E+00 7.40E+00 LF L3037-04 23 Ba-140 -1.30E+00 1.80E+00 7.20E+00 LF L3037-04 23 Be-7 -8.00E+00 1.20E+01 4.20E+0I LF L3037-04 23 Ce-141 -7.30E+00 2.30E+00 8.302+00 LF L3037-04 23 Ce-144 -1.96E+01 7.202+00 2.60E+0I LF L3037-04 23 Co-57 -5.00E-01 9.60E-01 3.30E+00 LF L3037-04 23 Co-58 -I.OOE+00 1.50E+00 5.50E+00 LF L3037-04 23 Co-60 2.60E+00 1.50E+00 4.90E+00 LF L3037-04 23 Cr-51 -1.20E+01 1.30E+01 4.70E+01 LF. L3037-04 23 Cs-134 4.00E-01 1.60E+00 5.60E+00 LF L3037-04 23 Cs-137 -5.00E-01 1.50E+00 5.20E+00 LF L3037-04 23 Fe-59 5.30E+00 3.902+00 1.30E+0I LF L3037-04 23 1-131 4.00E-01 3.00E-01 9.80E-01 LF L3037-04 23 K-40 1.48E+03 5.30E+01 7.30E+01 LF L3037-04 23 La-140 -1.50E+00 2.10E+00 8.30E+00 LF L3037-04 23 Mn-54 1.20E+00 1.50E+00 5.00E+00 LF L3037-04 23 Nb-95 1.602+00 1.60E+00 5.50E+00 LF L3037-04 23 Ru-103 -1.30E+00 1.40E-+00 5.10E+00 LF L3037-04 23 Ru-106 -7.00E+00 1.30E+01 4.50E+01 LF L3037-04 23 Sb-124 6.00E-01 2.80E+00 I.OOE+01 LF L3037-04 23 Sb-125 -3.80E+00 3.30E+00 1.20E+01 LF L3037-04 23 Se-75 3.40E+00 1.70E+00 5.702+00 LF L3037-04 23 Zn-65 -2.40E+00 3.50E+00 1.30E+01 LF L3037-04 23 Zr-95 -5.00E-01 2.302+00 8.30E+00 WF L3037-05 23 Aclh-228 2.30E+00 5.70E+00 2.00E+01 WF, L3037-05 23 Ag-108m 1.25E+00 9.502-01 3.20E+00 WF L3037-05 23 Ag-I lOm -3.20E+00 1.80E+00 6.80E+00 WF L3037-05 23 Ba-140 I.IOE+00 2.10E+00 7.60E+00 WF L3037-05 23 Be-7 8.00E+00 1.10E+01 3.70E+01 WF L3037-05 23 Ce-141 -2.20E+00 2.1OE+00 7.40E+00 WF L3037-05 23 Ce-144 -8.40E+00 6.40E+00 2.30E+OI WF L3037-05 23 Co-57 -6.00E-02 9.80E-01 3.30E+00 WF L3037-05 23 Co-58 2.00E-01 1.30E+00 4.602+00 WF L3037-05 23 Co-60 1.40E+00 1.30E+00 4.50E+00 WF L3037-05 23 Cr-51 -6.00E+00 1.20E+01 4.20E+01 WF L3037-05 23 Cs-134 -1.302+00 1.30E+00 4.702+00 WF L3037-05 23 Cs-137 1.902+00 1.40E+00 4.70E+00 WF L3037-05 23 Fe-59 8.OOE-01 4.202+00 1.50E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-102

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WF L3037-05 23 1-131 5.40E-01 3.30E-01 L.OOE+00 WF L3037-05 23 K-40 1.52E+03 5.30E+01 6.90E+01 WF L3037-05 23 La-140 1.30E+00 2.50E+00 8.70E+O0 WF L3037-05 23 Mn-54 -I.OOE-0 1.20E+00 4.30E+0O WF L3037-05 23 Nb-95 1.70E+00 1.30E+00 4.40E+0O WF L3037-05 23 Ru-103 3.OOE-01 1.40E+00 4.80E+0O WF L3037-05 23 Ru-106 -5.OOE+00 1.30E+01 4.50E+0O WF L3037-05 23 Sb-124 -1.30E+00 3.20E+00 1.20E+0O WF L3037-05 23 Sb-125 1.IOE+00 3.10E+00 I.IOE+0O WF L3037-05 23 Se-75 7.00E-01 1.30E+00 4.50E+00 WF L3037-05 23 Zn-65 1.40E+00 3.20E+00 I.IOE+0O WF L3037-05 23 Zr-95 4.30E+00 2.40E+00 7.70E+00 GTF L3143-01 25 AcTh-228 8.20E+00 5.20E+00 1.70E+0O GTF L3143-01 25 Ag-108m -1.20E+00 1.1OE+00 3.90E+00 GTF L3143-01 25 Ag- lOim -4.OOE-01 2.20E+00 7.60E+00 GTF L3143-01 25 Ba-140 -2.10E+00 3.20E+00 1.20E+0O GTF L3143-01 25 Be-7 I.OOE+00 1.IOE+01 3.90E+01 GTF L3143-01 25 Ce-141 1.50E+00 2.OOE+00 6.60E+00 GTF L3143-01 25 Cc-144 5.20E+00 6.70E+00 2.20E+0O GTF L3143-01 25 Co-57 9.80E-01 8.10E-01 2.70E+00 GTF L3143-01 25 Co-58 -1.20E+00 1.40E+00 5.OOE+00 GTF U3143-01 25 Co-60 -7.OOE-01 1.70E+00 6.30E+00 GTF L3143-01 25 Cr-51 L.OOE+0 1.30E+01 4.40E+01 GTF L3143-01 25 Cs-134 -1.30E+00 1.50E+00 5.50E+00 GTF L3143-01 25 Cs-137 -1.IOE+00 1.40E+00 5.20E+00 GTF L3143-01 25 Fe-59 I.OOE+O0 3.90E+00 1.30E+01 GTF L3143-01 25 1-131 5.10E-01 2.70E-01 7.70E-0O GTF L3143-01 25 K-40 1.46E+03 5.70E+01 8.40E+0I GTF L3143-01 25 La-140 -2.40E+00 3.70E+00 1.40E+01 GTF L3143-01 25 Mn-54 -1.90E+00 1.40E+00 5.30E+00 GTF L3143-01 25 Nb-95 9.OOE-01 1.70E+00 5.90E+00 GTF L3143-01 25 Ru-103 -I.OOE+00 1.50E+00 5.40E+00 GTF L3143-01 25 Ru-106 3.OOE+00 1.20E+01 4.30E+0O GTF L3143-01 25 Sb-124 -8.OOE+00 3.50E+00 1.50E+0O GTF L3143-01 25 Sb-125 -6.90E+00 3.20E+00 1.20E+0O GTF L3143-01 25 Se-75 -6.OOE-01 1.60E+00 5.50E+00 GTF L3143-01 25 Zn-65 O.OOE+00 3.40E+00 1.20E+01 GTF L3143-01 25 Zr-95 -3.OOE+00 2.40E+00 9.10E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-103

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR L3143-02 25 AcTh-228 -9.OOE-01 4.60E+00 1.60E+01 MR L3143-02 25 Ag-108m l.lOE-01 8.80E-01 3.00E+00 MR L3143-02 25 Ag-I lOm O.OOE+00 1.50E+00 5.30E+00 MR L3143-02 25 Ba-140 -1.30E+00 2.10E+00 7.80E+00 MR L3143-02 25 Be-7 -L.70E+01 l.OOE+01 3.70E+01 MR L3143-02 25 Cc-141 -2.00E+00 2.00E+00 6.90E+00 MR L3143-02 25 Ce-144 1.42E+01 6.20E+00 2.00E+01 MR L3143-02 25 Co-57 6.80E-01 7.90E-01 2.70E+00 MR L3143-02 25 Co-58 -9.00-01 1.30E+00 4.50E+00 MR L3143-02 25 Co-60 1.40E+00 1.20E+00 4.10E+00 MR L3143-02 25 Cr-51 1.60E+0O 1.20E+01 4.00E+01 MR L3143-02 25 Cs-134 -8.OOE-01 1.30E+00 4.70E+00 MR L3143-02 25 Cs-137 -1.60E+00 1.20E+00 4.40E+00 MR L3143-02 25 Fe-59 l.OOE-0O 3.00E+00 1.10+01 -

MR U 143-02 25 1-131 8.OOE-01 3.40E-01 8.40E-01 MR L3143-02 25 K-40 1.79E+03 4.80E+01 5.70E+01 MR L3143-02 25 La-140 -1.50E+00 2.40E+00 9.00E+00 MR L3143-02 25 Mn-54 1.OOE-01 1.20E+00 4.10E+00 MR L3143-02 25 Nb-95 -2.80E+00 1.40E+00 5.102+00 MR L3143-02 25 Ru-103 2.00E-01 1.30E+00 4.30E+00 MR L3143-02 25 Ru-106 -5.00E+00 1.10+01 3.70E+01 MR L3143-02 25 Sb-124 -2.80E+00 2.80E+00 1.00+01 MR L3143-02 25 Sb-125 1.50E+00 2.80E+00 9.50E+00 MR L3143-02 25 Se-75 -7.00E-01 1.50E+00 5.10E+00 MR L3143-02 25 Zn-65 -3.00E+00 3.20E+00 1.10+01 MR L3143-02 25 Zr-95 -8.00E-01 2.00E+00 7.20E+00 SF L3143-03 25 AcTh-228 8.OOE-01 4.80E+00 1.60E+01 SF L3143-03 25 Ag-108m 4.10E-01 8.50E-01 2.90E+00 SF L3143-03 25 Ag-i lOm -2.OOE-01 1.502+00 5.202+00 SF L3143-03 25 Ba-140 1.20E+00 1.80E+00 6.202+00 SF L3143-03 25 Be-7 -6.20E+00 8.40E+00 3.00E+01 SF L3143-03 25 Ce-141 O.OOE+00 1.60E+00 5.30E+00 SF W3143-03 25 Ce-144 3.10E+00 5.40E+00 1.80E+01 SF L3143-03 25 Co-57 8.00E-02 7.00E-01 2.402+00 SF L3143-03 25 Co-58 1.44E+00 9.90E-01 3.30E+00 SF L3143-03 25 Co-60 7.00E-01 1.10E+00 3.70E+00 SF L3143-03 25 Cr-51 -1.70E+01 1.00+01 3.70E+01 SF L3143-03 25 Cs-134 -2.00E-01 .1OE+00 3.90E+00 SF L3143-03 25 Cs-137 8.00E-01 l.OOE+00 3.50E+00 SF L3143-03 25 Fe-59 2.00E+00 3.20E+00 1.l10E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-104

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SF L3143-03 25 1-131 4.50E-01 3.1OE-OI 9.80E-0O SF L3143-03 25 K-40 1.34E+03 4.20E+0O 6.OOE+0I SF L3143-03 25 La-140 1.30E+0O 2.OOE+00 7.10E+00 SF L3143-03 25 Mn-54 -6.60E-0O 9.60E-01 3.50E+00 SF L3143-03 25 Nb-95 -1.50E+00 1.60E+O0 5.90E+00 SF L3143-03 25 Ru-103 -2.30E+00 1.lOE+O0 4.20E+00 SF L3143-03 25 Ru-106 2.40E+00 9.30E+OO 3.20E+01 SF L3143-03 25 Sb-124 -3.40E+O0 2.30E+OO 9.OOE+00 SF L3143-03 25 Sb-125 2.OOE-01 2.50E+00 8.60E+0O SF L3143-03 25 Se-75 -3.OOE-01 l. lOE+O0 3.90E+0O SF L3143-03 25 Zn-65 -5.60E+00 2.60E+00 9.70E+00 SF L3143-03 25 Zr-95 -1.80E+00 1.80E+00 6.60E+00 LF L3143-04 25 AcTh-228 1.14E+01 5,30E+O0 1.70E+0O LF L3143-04 25 Ag-108m -2.00E-0O 1.1OE+00 3.70E+00 LF L3143-04 25 Ag- lOrm 5.OOE-0O 1.70E+00 6.10E+00 LF L3143-04 25 Ba-140 5.60E+00 3.70E+00 1.20E+0O LF L3143-04 25 Be-7 -I.OOE+00 1.lOE+01 3.80E+01 LF L3143-04 25 Ce-141 -1.50E+00 2.OOE+00 6.90E+00 LF L3143-04 25 Cc-144 -1.39E+01 6.50E+00 2.30E+0O LF L3143-04 25 Co-57 -1.56E+00 8.30E-01 2.90E+00 LF L3143-04 25 Co-58 1.40E+00 1.50E+O0 5.OOE+00 LF L3143-04 25 Co-60 8.00E-O1 1.70E+00 5.90E+00 LF L3143-04 25 Cr-51 5.OOE+00 1.40E+01 4.60E+0O LF L3143-04 25 Cs-134 -2.50E+00 1.501E+00 5.50E+00 LF L3143-04 25 Cs-137 1.70E+00 1.40E+O0 4.60E+00 LF L3143-04 25 Fe-59 5.90E+00 5.60E+00 1.90E+01 LF L3143-04 25 1-131 5.50E-01 3.30E-01 9.80E-01 LF L3143-04 25 K-40 1.38E+03 5.50E+0O 7.80E+01 LF L3143-04 25 La-140 6.40E+OO 4.20E+00 1.40E+0O LF L3143-04 25 Mn-54 2.30E+0O 1.60E+00 5.20E+00 LF L3143-04 25 Nb-95 -I.OOE-01 1.80E+OO 6.30E+00 LF L3143-04 25 Ru-103 -1.70E+00 1.50E+00 5.50E+00 LF L3143-04 25 Ru-106 1.60E+0O 1.30E+0O 4.20E+O1 LF L3143-04 25 Sb-124 2.20E+00 3.60E+00 1.30E+0O LF L3143-04 25 Sb-125 5.80E+00 3.40E+O0 I. IOE+01 LF L3143-04 25 Se-75 -2.OOE-0O 1.70E+00 5.70E+00 LF L3143-04 25 Zn-65 1.60E+00 3.50E+00 1.20E+0O LF L3143-04 25 Zr-95 -5.00E-0O 2.60E+00 9.30E+OO WF L3143-05 25 AcTh-228 2.50E+00 4.50E+00 1.5OE+OI WF L3143-05 25 Ag-108m 4.60E-OI 8.40E-O1 2.80E+OO

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-105

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WF L3143-05 25 Ag-l1lm 2.00E-01 1.50E+00 5.00E+00 WF W3143-05 25 Ba-140 2.70E+00 2.202+00 7.30E+00 WF L3143-05 25 Be-7 5.OOE-01 8.70E+00 3.00E+01 WF L3143-05 25 Cc-141 -2.30E+00 1.702+00 5.80E+00 WF L3143-05 25 Ce-144 5.60E+00 5.402+00 1.802+01 WF L3143-05 25 Co-57 -1.20E+00 1.101O+00 3.90E+00 WF W143-05 25 Co-58 -2.00E-01 1.OOE+00 3.60E+00 WF 1W143-05 25 Co-60 0.OOE+00 1.20E+00 4.IOE+00 WF W3143-05 25 Cr-51 6.00E+00 1.10E+01 3.80E+01 WF W3143-05 25 Cs-134 1.70E+00 1.10E+00 3.60E+00 WF W3143-05 25 Cs-137 -5.00E-01 1.1OE+00 3.90E+00 -

WF W3143-05 25 Fe-59 1.60E+00 3.60E+00 1.202+01 WF W3143-05 25 1-131 -2.40E-01 1.30E-01 1.002+00 WF W3143-05 25 K-40 1.42E+03 4.00E+01 4.902+01 WF U 143-05 25 La-140 3.10E+00 2.50E+00 8.40E+00 WF L3143-05 25 Mn-54 -1.IOE+00 1.102+00 3.802+00 WF L3143-05 25 Nb-95 -1.I10E+00 1.50E+00 5.30E+00 WF L3143-05 25 Ru-103 -4.10E+00 1.10+00 4.30E+00 WF L3143-05 25 Ru-106 -1.56E+01 9.80E+00 3.50E+0O WE W3143-05 25 Sb-124 1.70E+00 2.20E+00 7.70E+00 WF L3143-05 25 Sb-125 -6.50E+00 2.50E+00 9.20E+00 WF W3143-05 25 Se-75 -5.00E-01 1.302+00 4.40E+00 WF 12143-05 25 Zn-65 -2.40E+00 2.30E+00 8.40E+00 WF W3143-05 25 Zr-95 8.00E-0O 1.80E+00 6.20E+00 GTF W3252-01 27 AcTh-228 -1.06E+0O 6.70E+00 2.50E+0I GTF W3252-01 27 Ag-108m I.OE+00 1.302+00 4.40E+00 GTF L3252-01 27 Ag- lOim -1.80E+00 2.50E+00 9.30E+00 GTF L3252-01 27 Ba-140 3.30E+00 2.90E+00 9.90E+00 GTF L3252-01 27 Be-7 -6.OOE+00 1.40E+01 5.00E+01 GTF L3252-01 27 Ce- 141 2.80E+00 2.40E+00 7.90E+00 GTF L3252-01 27 Cc-144 -1.70E+00 7.70E+00 2.60E+01 GTF L3252-01 27 Co-57 2.50E-01 9.60E-01 3.30E+00 GTF W3252-01 27 Co-58 -I.OOE+00 1.60E+00 5.90E+00 GTF W3252-01 27 Co-60 2.60E+00 1.902+00 6.30E+00 GTF W3252-01 27 Cr-51 -7.00E+00 1.502+01 5.20E+01 GTF L3252-01 27 Cs-134 1.30E+00 2.00E+00 6.90E+00 GTF L3252-01 27 Cs-137 -4.002-01 1.702+00 6.102+00 GTF L3252-01 27 Fe-59 -7.50E+00 6.20E+00 2.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-106

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

GTF U3252-01 27 1-131 3.00E-01 1.90E-01 5.80E-01 GTF U3252-01 27 K-40 1.35E+03 6.40E+01 8.10E+01 GTF U3252-01 27 La-140 3.80E+00 3.30E+00 1.10+01 GTF U3252-01 27 Mn-54 -1.60E+00 1.60E+00 6.10E+00 GTF U3252-01 27 Nb-95 -2.30E+00 2.00E+00 7.50E+00 GTF U3252-01 27 Ru-103 -3.50E+00 1.80E+00 6.802+00 GTF U3252-01 27 Ru-106 -5.OOE+00 1.50E+01 5.20E+01 GTF U3252-01 27 Sb-124 O.OOE+00 3.90E+00 1.50E+01 GTF L3252-01 27 Sb-125 2.30E+00 4.10E+00 1.402+01 GTF L3252-01 27 Se-75 -2.80E+00 1.80E+00 6.60E+00 GTF U3252-01 27 Zn-65 -8.30E+00 4.40E+00 1.70E+01 GTF L3252-01 27 Zr-95 4.60E+00 2.90E+00 9.60E+00 MR L3252-02 27 AcTh-228 3.40E+00 7.60E+00 2.70E+01 MR L3252-02 27 Ag-108m 5.00E-01 1.30E+00 4.60E+00 MR L3252-02 27 Ag-l lOm 6.101E+00 2.70E+00 8.70E+00 MR L3252-02 27 Ba-140 3.90E+00 2.90E+00 9.60E+00 MR L3252-02 27 Be-7 3.50E+01 1.60E+01 5.00E+01 MR U2252-02 27 Ce-141 2.30E+00 2.40E+00 7.902+00 MR 12252-02 27 Ce-144 -7.20E+00 8.40E+00 2.90E+01 MR U3252-02 27 Co-57 3.00E-01 1.00E+00 3.50E+00 MR 12252-02 27 Co-58 -1.90E+00 1.60E+00 6.30E+00 MR U3252-02 27 Co-60 1.30E+00 2.20E+00 7.50E+00 MR L3252-02 27 Cr-51 2.20E+01 1.50E+01 5.00E+01 MR U3252-02 27 Cs-134 -1 .OOE-01 1.90E+00 6.90E+00 MR U3252-02 27 Cs-137 2.70E+00 1.70E+00 5.602+00 MR U3252-02 27 Fe-59 0.0023+00 6.40E+00 2.30E+01 MR U3252-02 27 1-131 2.20E-01 2.30E-01 8.60E-01 MR 12252-02 27 K-40 1.85E+03 7.60E+01 1.OOE+02 MR U3252-02 27 La-140 4.50E+00 3.30E+00 1.10E+O1 MR U3252-02 27 Mn-54 -3.60E+00 1.70E+00 6.80E+00 MR U3252-02 27 Nb-95 -9.OOE-01 2.00E+00 7.40E+00 MR U3252-02 27 Ru-103 -4.00E+00 1.80E+00 6.90E+00 MR U3252-02 27 Ru-106 1.30E+01 1.60E+01 5.30E+01 MR U3252-02 27 Sb-124 2.30E+00 5.00E+00 1.80E+01 MR 12252-02 27 Sb-125 2.70E+00 3.80E+00 1.30E+01 MR U3252-02 27 Se-75 -1.80E+00 1.90E+00 6.80E+00 MR U3252-02 27 Zn-65 5.00E-01 4.80E+00 1.70E+01 MR U2252-02 27 Zr-95 4.OOE-01 3.00E+00 I. IOE+01 SF U3252-03 27 AcTh-228 -1.00E-01 4.00E+00 1.40E+01 SF U3252-03 27 Ag-108m 3.10E-01 8.30E-01 2.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-107

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCilkg)

SF L3252-03 27 Ag-l Orm 1.70E+00 1.40E+00 4.70E+O0 SF L3252-03 27 Ba-140 -6.20E+00 2.20E+00 8.90E+00 SF L3252-03 27 Be-7 6.10E+00 9.10E+00 3.10E+0I SF L3252-03 27 Ce-141 1.70E+00 1.70E+00 5.70E+00 SF L3252-03 27 Cc-144 -4.50E+00 5.80E+00 2.OOE+01 SF L3252-03 27 Co-57 7.10E-01 7.50E-01 2.50E+00 SF L3252-03 27 Co-58 1.90E+O0O I .IOE+00 3.50E+00 SF L3252-03 27 Co-60 1.70E+00 1.IOE+00 3.50E+00 SF L3252-03 27 Cr-51 -l.OOE+00 1.IOE+0I 3.70E+01 SF L3252-03 27 Cs-134 1.40E+00 1.20E+00 3.90E+00 SF L3252-03 27 Cs-137 7.OOE-O1 I.IOE+00 3.60E+00 SF L3252-03 27 Fe-59 3.30E+00 3.30E+00 I.1OE+0O SF L3252-03 27 1-131 3.70E-01 2.00E-01 5.70E-OI SF L3252-03 27 K-40 1.36E+03 3.80E+01 4.50E+0I SP L3252-03 27 La-140 -7.1OE+00 2.60E+00 I.OOE+01 SF L3252-03 27 Mn-54 3.00E-0O 1.OOE+00 3.60E+00 SF L3252-03 27 Nb-95 -3.OOE-01 1.50E+00 5.10E+00 SF L3252-03 27 Ru-103 -3.30E+00 1.I1E+00 4.20E+00 SF L3252-03 27 Ru-106 -3.30E+00 9.30E+00 3.20E+0I SF L3252-03 27 Sb-124 2.20E+00 2.40E+00 8.10E+00 SF L3252-03 27 Sb-125 8.00E-01 2.70E+00 9.10E+00 SF L3252-03 27 Se-75 -1.OOE-0I 1.30E+00 4.40E+00 SF 12252-03 27 Zn-65 9.OOE-01 3.70E+00 1.20E+01 SF L3252-03 27 Zr-95 4.OOE-01 1.80E+00 6.40E+00 LF 12252-04 27 AcTh-228 9.00E+00 3.70E+00 1.20E+01 LF L3252-04 27 Ag-108m -5.40E-01 7.60E-01 2.70E+00 LF L3252-04 27 Ag-l tOm -I.OOE-01 1.20E+00 4.20E+00 LF L3252-04 27 Ba-140 -2.OOE+00 1.80E+00 6.80E+00 LF W3252-04 27 Be-7 -5.70E+00 7.90E+00 2.80E+01 LF L3252-04 27 Ce-141 4.OOE-01 1.80E+00 6.OOE+00 LF L3252-04 27 Ce-144 9.40E+00 4.90E+00 1.60E+01 LF L3252-04 27 Co-57 -4.50E-01 7.80E-01 2.70E+00 LF L3252-04 27 Co-58 -1.25E+00 9.90E-01 3.60E+00 LF L3252-04 27 Co-60 -3.00E-01 l.IOE+O0 3.90E+00 LF L3252-04 27 Cr-51 5.90E+00 9.70E+00 3.30E+01 LF L3252-04 27 Cs-134 -1.57E+00 8.90E-01 3.30E+00 LF 12252-04 27 Cs-137 1.60E+00 1.OOE+00 3.30E+00 LF 12252-04 27 Fe-59 5.80E+00 3.20E3+00 1.OOE+01 LF 12252-04 27 1-131 2.80E-01 2.40E-01 8.50E-0O LF 12252-04 27 K-40 1.35E+03 3.80E+01 5.70E+0I

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-108

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LF L3252-04 27 La-140 -2.30E+00 2.00E+O00 7.80E+00 LF 12252-04 27 Mn-54 1.85E+00 8.70E3-01 2.80E+00 LF U2252-04 27 Nb-95 8.001E-01 1.201E+00 4.OOE+00 LF L3252-04 27 Ru-103 -1.70E+00 3.80E+00 LF U3252-04 27 Ru-106 2.501E+00 9.301E+00 3.20E+01 LF U2252-04 27 Sb-124 1.OOE2+00 2.20E+00 7.7013+00 LF U2252-04 27 Sb-125 L OOE-01 2.401E+00 8.10E+00 LF U3252-04 27 Sc-75 9.OOE-01 l.OOE+00 3.30E+00 LF U3252-04 27 Zn-65 2.40E+00 2.30E+00 7.701E+00 LF U3252-04 27 Zr-95 -8.001-01 1.801E+00 6.30E+00 WF W3252-05 27 Aclb-228 3.30E+00 4.80E+00 1.60E+01 WF 12252-05 27 Ag-108m 8.10E-01 9.301E-01 3.10OE+00 WF 12252-05 27 Ag- IlOn -4.OOE-01 1.40E+00 5. IOE+00 WF L3252-05 27 Ba-140 -2.50E+00 2.10OE+00 8.40E+00 WF 12252-05 27 Be-7 1.13E+01 9.60E+00 3.20E+01 WF 12252-05 27 Ce-141 -4.10OE+00 2.OOE+00 7.20E+00 WF 12252-05 27 Cc-144 -2.1IOE+00 6.OOE+00 2.IOE+01 WF 12252-05 27 Co-57 5.OOE-01 8.70E-01 2.90E+00 WF 12252-05 27 C6-58 -1.OOE+00 I1.20E+00 4.50E+00 WF L3252-05 27 Co-60 -5.00OE-01 I1.40E+00 5.OOE+00 WF L3252-05 27 Cr-Si I.OOE+01 I1.20E.+01 4.OOE+01 WF 12252-05 27 Cs-134 5.001E-01 I. lOE+00 3.80E3+00 WF 12252-05 27 Cs-137 0.OOE3+00 I1.301E+00 4.40E+00 WF 12252-05 27 Fe-59 1.501E+00 4.10E+00 1.40E+01 WF U3252-05 27 1-131 3.50E-01 2.60E-01 8.40E-01 WF 12252-05 27 K-40 1.47E+03 4.80E+01 6.60E+01 WF 13252-05 27 La-140 -2.90E+00 2.40E+00 9.70E+00 WF L3252-05 27 Mn-54 -1 .20E+00 l.OOE+00 3.80E+00 WF 12252-05 27 Nb-95 O.OOE+00 1.401E+00 4.80E4-00 WF L3252-05 27 Ru-103 1.50E+00 I1.301E+00 4.50E+00 WF 12252-05 27 Ru-106 -2.OOE+00 1. lOE+01 3.90E+01 WF L3252-05 27 Sb-124 -2.30E+00 2.70E+00 I. IOE+01 WF L3252-05 27 Sb-125 3.80E+00 2.80E+00 9.301E+00 WF L3252-05 27 Se-75 -l1.20E+00 I1.20E+00 4.40E+00 WF L3252-05 27 Zn-65 2.60E+00 3.70E+00 1.20E+01 WF L3252-05 27 Zr-95 -4. 1OE+00 2.20E+00 8.30E+00 GTF L3335-01 29 AcTl-228 3.80E+00 4.70E+00 1.60E+01 GTF L3335-01 29 Ag-108m L.OOE-01 9.80E-01 3.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-109

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

GTF L3335-01 29 Ag-l l0m -1.40E+00 1.70E+O0 6.30E+00 GTF L3335-0O 29 Ba-140 1.OOE+00 1.30E+00 4.90E+00 GTF L3335-0O 29 Be-7 9.20E+00 9.40E+00 3.20E+01 GTF L3335-01 29 Ce-141 -8.OOE-01 2.00E+00 7.1 OE+00 GTF L3335-01 29 Ce-144 9.30E+00 7.90E+00 2.60E+01 GTF L3335-01 29 Co-57 8.10E-0O 9.30E-01 3. 1OE+00 GTF L3335-01 29 Co-58 6.00E-01 1.IOE+00 3.80E+00 GTF L3335-01 29 Co-60 3.60E-01 9.20E-01 3.40E+O0 GTF L3335-01 29 Cr-51 -6.00E+00 I.1OE+01 4.1OE+OI GTF L3335-01 29 Cs-134 9.00E-0O 1.20E+00 4.10E+00 GTF L3335-01 29 Cs-137 -9.00E-01 1.20E+00 4.70E+O0 GTF L3335-01 29 Fe-59 4.70E+00 3. 10E+00 1.OOE+0l GTF L3335-01 29 1-131 3.10E-0O 2.70E-01 9.50E-01 GTF L3335-01 29 K-40 1.38E+03 5.30E+01 5.30E+01 GTF L3335-01 29 La-140 1.IOE+OO 1.50E+00 5.60E+00 GTF L3335-01 29 Mn-54 4.OOE-01 1.20E+00 4.10E+00 GTF L3335-01 29 Nb-95 1.70E+00 1.20E+00 4.00E+00 GTF L3335-01 29 Ru-103 6.OOE-01 l.IlOE+00 3.90E+O0 GTF L3335-01 29 Ru-106 1.30E+01 1.OOE+01 3.40E+01 GTF L3335-01 29 Sb-124 -1.50E+00 1.80E+00 8. 10E+00 GTF L3335-01 29 Sb-125 9.OOE-0O 2.90E+00 1.OOE+0I GTF L3335-01 29 Se-75 -1.OOE+00 1.50E+00 5.20E+00 GTF L3335-01 29 Zn-65 -4.40E+00 2.90E+O0 1.lOE+01 GTF L3335-01 29 Zr-95 2.00E-0O 2.00E+00 7.30E+00 MR L3335-02 29 AcTh-228 1.60E+00 4.70E+00 1.70E+0O MR L3335-02 29 Ag-108m 1.70E+O0 1.OOE+OO 3.40E+00 MR 1335-02 29 Ag-l lOm 4.00E-01 1.80E+00 6.20E3+00 MR L3335-02 29 Ba-140 3.OOE-01 1.60E+00 5.90E+00 MR 1335-02 29 Be-7 9.00E+O0 1.OOE+01 3.50E+01 MR L3335-02 29 Ce-141 8.OOE-01 2.20E+00 7.50E+00 MR L3335-02 29 Ce-144 5.60E+00 8. 1OE+O0 2.70E+01 MR L3335-02 29 Co-57 1.OOE+00 I. 1OE+00 3.60E+00 MR L3335-02 29 Co-58 -2.60E+00 1.20E+00 4.90E+00 MR L3335-02 29 Co-60 1.20E+O0 1.30E+00 4.50E+00 MR L3335-02 29 Cr-51 4.OOE+00 1.20E+01 4. IOE+01 MR L3335-02 29 Cs-134 -2. 10E+00 1.40E+00 5.30E+00 MR L3335-02 29 Cs-137 -1.90E+00 1.40E+00 5.20E+00 MR L3335-02 29 Fe-59 -1.20E+00 3.70E+00 1.40E1+0I MR L3335-02 29 1-131 4.OOE-01 3.00E-01 9.70E-01 MR L3335-02 29 K-40 1.83E+03 6.OOE+01 5.20E+0OI

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-110

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR L3335-02 29 La-140 4.OOE-01 1.80E+00 6.80E+00 MR L3335-02 29 Mn-54 7.OOE-0I 1.IOE+00 3.80E+00 MR L3335-02 29 Nb-95 2.OOE-0I 1.30E+00 4.60E+00 MR L3335-02 29 Ru-103 2.OOE-01 1.30E+00 4.60E+00 MR L3335-02 29 Ru-106 l.OOE+00 1.OOE+01 3.70E+0I MR L3335-02 29 Sb-124 -6.OOE-0I 2.50E+00 9.80E+00 MR L3335-02 29 Sb-125 -4.90E+00 2.80E+00 I.1OE+01 MR L3335-02 29 Se-75 8.OOE-0I 1.60E+00 5.50E+00 MR L3335-02 29 Zn-65 -2.80E+00 3.60E+00 1.30E+0I MR L3335-02 29 Zr-95 2.20E+00 1.90E+00 6.50E+O0 SF L3335-03 29 AcTh-228 4.OOE+00 4.50E+00 1.50E+0I SF L3335-03 29 Ag-108m -5.40E-0I 8.50E-01 3.1OE+00 SF L3335-03 29 Ag-I lOm -4.OOE-01 1.40E+00 5.30E+00 SF L3335-03 29 Ba-140 -1 .OOE+00 1.50E+00 6.OOE+00 SF L3335-03 29 Be-7 -7.50E+00 8.60E+00 3.20E+01 SF L3335-03 29 Ce-141 6.00E-0O 1.90E+00 6.70E+00 SF L3335-03 29 Ce-144 1.92E+0I 6.90E+00 2.20E+01 SF L3335-03 29 Co-57 1.08E+00 9.30E-01 3.10E+O0 SF L3335-03 29 Co-58 8.OOE-0I l.OOE+O0 3.60E+00 SF L3335-03 29 Co-60 O.OOE+00 1.20E+00 4.30E+00 SF L3335-03 29 Cr-51 -1.30E+0I 1.1OE+01 3.90E+01 SF L3335-03 29 Cs-134 l.OOE+00 l.lOE+00 3.80E+00 SF L3335-03 29 Cs-137 -1.20E+00 1.20E+00 4.60E+00 SF L3335-03 29 Fe-59 1.20E+00 3.80E+00 1.30E+01 SF L3335-03 29 1-131 4.OOE-02 2.OOE-01 9.70E-0O SF L3335-03 29 K-40 1.49E+03 5.30E+01 5.1OE+01 SF L3335-03 29 La-140 -1.20E+00 1.70E+00 6.80E+00 SF L3335-03 29 Mn-54 l.OOE-01 l.OOE+00 3.70E+00 SF L3335-03 29 Nb-95 -1 .30E+00 1.20E+00 4.70E+00 SF L3335-03 29 Ru-103 4.OOE-OI l.lOE+00 3.80E+00 SF L3335-03 29 Ru-106 3.60E+00 9.20E+00 3.30E+01 SF L3335-03 29 Sb-124 5.OOE-01 1.90E+00 7.50E+00 SF L3335-03 29 Sb-125 -5.OOE-0O 2.70E+00 9.80E+00 SF L3335-03 29 Se-75 O.OOE+00 1.20E+00 4.30E+00 SF L3335-03 29 Zn-65 4.40E+00 2.80E+00 I.IOE+01 SF L3335-03 29 Zr-95 1.90E+00 1.70E+00 5.90E+00 LF L3335-04 29 AcTh-228 -8.OOE+00 6.30E+00 2.40E+01 LF L3335-04 29 Ag-108m -3.OOE-01 l.lOE+00 3.90E+00 LF L3335-04 29 Ag-lOrm -IOOE-01 2.10E+00 7.80E+O0 LF L3335-04 29 Ba-140 3.10E+00 1.80E+00 5.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-111

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LF L3335-04 29 Be-7 -I.OOE+01 1.00+01 4.00E+01 LF L3335-04 29 Cc-141 1.50IE+00 2.90E+00 1.OOE+01 LF L3335-04 29 Ce-144 1.OOE+01 1.10E+01 3.80E+01 LF L3335-04 29 Co-57 1.70E+00 1.40E+00 4.50E+00 LF L3335-04 29 Co-58 6.OOE-01 1.402+00 5.10E+00 LF L3335-04 29 Co-60 2.1OE+00 1.70E+00 5.80E+00 LF L3335-04 29 Cr-51 -7.00E+00 1.302+01 4.70E+01 LF L3335-04 29 Cs-134 8.00E-01 1.60E+00 5.80E+00 LF L3335-04 29 Cs-137 4.00E-01 1.40E+00 5.20E+00 LF L3335-04 29 Fe-59 -1.11+01 4.60E+00 2.00E+01 LF L3335-04 29 1-131 9.00E-01 3.90E-01 9.30E-01 LF L3335-04 29 K-40 1.40E+03 6.30E+01 6.30E+01 LF L3335-04 29 La-140 3.50E+00 2.10E+00 6.80E+00 LF L3335-04 29 Mn-54 2.50E+00 1.50E+00 4.90E+00 LF L3335-04 29 Nb-95 -1.20E+00 1.80E+00 6.80E+00 LF L3335-04 29 Ru-103 -1.80E+00 1.60E+00 5.90E+00 LF L3335-04 29 Ru-106 O.OOE+00 1.202+01 4.40E+01 LF L3335-04 29 Sb-124 l.OOE+00 2.80E+00 1.1OE+01 LF L3335-04 29 Sb-125 3.50E+00 3.90E+00 1.30E+01 LF L3335-04 29 Se-75 8.00E-01 1.902+00 6.60E+00 LF L3335-04 29 Zn-65 3.10E+00 3.40E+00 1.202+01 LF L3335-04 29 Zr-95 4.1OE+00 2.602+00 8.40E+00 WF L3335-05 29 AcTh-228 -7.00E-01 6.90E+00 2.50E+01 WF L3335-05 29 Ag-108m -6.OOE-01 1.30E+00 4.70E+00 WF L3335-05 29 Ag-I lOIm 2.90E+00 2.10E+00 7.102+00 WF L3335-05 29 Ba-140 -1.902+00 2.802+00 1.202+01 WF L3335-05 29 Be-7 2.20E+01 1.30E+01 4.20E+01 WF L3335-05 29 Cc- 141 1.60E+00 2.602+00 8.70E+00 WF L3335-05 29 Ce-144 8.60E+00 9.30E+00 3.IOE+01 WF L3335-05 29 Co-57 -2.30E+00 1.20E+00 4.302+00 WF L3335-05 29 Co-58 -1.50E+00 1.40E+00 5.70E+00 WF L3335-05 29 Co-60 -6.00E-01 2.00E+00 7.60E+00 WF L3335-05 29 Cr-51 -9.00E+00 1.60E+01 5.70E+01 WF L3335-05 29 Cs-134 -3.00E+00 1.602+00 6.90E+00 WF L3335-05 29 Cs-137 1.00-01 1.802+00 6.40E+00 WF L3335-05 29 Fe-59 2.50E+00 5.10E+00 1.902+01 WF L3335-05 29 1-131 5.40E-01 3.10E-01 8.902-01 WF L3335-05 29 K-40 1.37E+03 7.40E+01 8.002+01 WF L3335-05 29 La-140 -2.20E+00 3.20E+00 1.302+01 WF L3335-05 29 Mn-54 3.80E+00 1.60E+00 4.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-1 12

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WF L3335-05 29 Nb-95 -2.OOE+00 1.80E+00 7.30E+00 WF L3335-05 29 Ru-103 -2.10E+00 1.60E+00 6.30E+00 WF L3335-05 29 Ru-106 2.20E+01 1.50E+01 5.OOE+01 WF L3335-05 29 Sb-124 -3.OOE+00 3.60E+00 1.60E+01 WF L3335-05 29 Sb-125 -1 ,OOE+O0 3.80E+00 1.40E+01 WF L3335-05 29 Se-75 1.70E+OO l.90E+00 6.40E+00 WF L3335-05 29 Zn-65 4.40E+00 3.50E+00 1.20E+01 WF L3335-05 29 Zr-95 2.20E+00 2.90E+00 l.OOE+01 GTF L3449-01 31 AcTh-228 9.OOE-0O 5.40E+00 l.90E+01 GTF L3449-01 31 Ag-108m 8.20E-01 8.90E-01 3.OOE+00 GTF L3449-01 31 Ag- lOnm 2.OOE-01 1.50E+00 5.30E+00 GTF L3449-01 31 Ba-140 -6.OOE-0O 1.90E+00 7.OOE+00 GTF L3449-01 31 Be-7 -9.60E+00 9.20E+00 3.30E+01 GTF L3449-01 31 Ce-141 -8.OOE-01 2.OOE+00 6.70E+00 GTF L3449-01 31 Ce-144 -2.60E+00 6.10E+00 2.1OE+01 GTF L3449-01 31 Co-57 -2.OOE-02 9.OOE-01 3. 1OE+00 GTF L3449-01 31 Co-58 I.OOE+00 1.IOE+00 3.80E+00 GTF L3449-01 31 Co-60 5.00E-01 1.30E+00 4.50E+00 GTF L3449-01 31 Cr-51 -5.OOE+00 1.1OE+01 3.90E+01 GTF L3449-01 31 Cs-134 1.30E+00 1.20E+00 3.90E+00 GTF L3449-01 31 Cs-137 -9.OOE-01 1.20E+00 4.30E+00 GTF L3449-01 31 Fe-59 -7.OOE-01 2.90E+00 1.OOE+01 GTF L3449-01 31 1-131 3.OOE-02 1.60E-01 8.10E-01 GTF L3449-01 31 K-40 1.26E+03 4.50E+01 6.20E+01 GTF L3449-01 31 La-140 -7.OOE-01 2. 1OE+00 8.10E+00 GTF L3449-01 31 Mn-54 1.20E+00 1.IOE+00 3.70E+00 GTF L3449-01 31 Nb-95 -1.70E+00 1.30E+00 4.90E+00 GTF U3449-01 31 Ru-103 -2.OOE-0I 1.20E+00 4.10E+00 GTF L3449-01 31 Ru-106 -1.1OE+01 1.1OE+01 3.90E+01 GTF U3449-01 31 Sb-124 -1 .IOE+00 2.60E+00 9.80E+00 GTF L3449-01 31 Sb-125 4.OOE-01 2.80E+00 9.80E+00 GTF U3449-01 31 Se-75 1.90E+00 1.20E+00 3.90E+00 GTF U3449-01 31 Zn-65 -3.80E+00 2.90E+00 l.IOE+01 GTF U3449-01 31 Zr-95 1.30E+00 2. 1OE+00 7.20E+00 MR U3449-02 31 AcTh-228 1.30E+01 7.30E+00 2.40E+O1 MR U3449-02 31 Ag-108m -1.IOE+00 1.20E+00 4.40E+00 MR U3449-02 31 Ag-I lOim -5.OOE-01 2.40E+00 8.60E+00 MR U3449-02 31 Ba-140 3.40E+00 2.90E+00 9.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-113

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR L3449-02 31 Be-7 0.OOE+00 1.40E+01 4.70E+I0 MR L3449-02 31 Ce-141 - 2.20E+00 2.70E+00 9.10E+00 MR L3449-02 31 Ce-144 -I.OOE-0O 9.70E+00 3.30E+01 MR L3449-02 31 Co-57 -I.OOE-0O 1.30E+00 4.30E+00 MR L3449-02 31 Co-58 -2.20E+00 I .70E+00 6.30E3+00 MR L3449-02 31 Co-60 -4.OOE-01 1.70E+00 6.30E+00 MR L3449-02 31 Cr-51 1.70E+01 1.60E+01 5.30E+0O MR L3449-02 31 Cs-134 -4.30E+00 1.70E+00 6.60E+00 MR L3449-02 31 Cs-137 1.40E1+00 1.60E+00 5.30E+O0 MR L3449-02 31 Fe-59 I.OOE+00 4.00E+00 1.40E+01 MR L3449-02 31 1-131 -4.OOE-02 1.30E-01 8.10E-OI MR L3449-02 31 K-40 1.66E+03 6.30E+01 8.50E+OI MR L3449-02 31 LA-140 3.90E+00 3.30E+00 1.IOE+01 MR L3449-02 31 Mn-54 1.50E+00 1.80E+00 6.20E+00 MR L3449-02 31 Nb-95 -3.50E+00 2.70E+00 I.OOE+OI MR L3449-02 31 Ru-103 -5.10E+00 1.70E+00 6.60E+00 MR L3449-02 31 Ru-106 -2.50E+01 1.50E+01 5.40E+01 MR L3449-02 31 Sb-124 2.50E+00 3.70E+00 1.30E+01 MR W3449-02 31 Sb-125 -1.OOE+00 3.80E+00 1.30E+01 MR 12449-02 31 Se-75 4.30E+00 2.OOE+00 6.60E+00 MR 12449-02 31 Zn-65 -1.53E+01 4.IOE+00 1.70E+01 MR 12449-02 31 Zr-95 -3.60E+00 3.1OE+00 l.lOE+01 SF 1W449-03 31 AcTh-228 -9.40E+00 6.70E+00 2.60E+0O SF L3449-03 31 Ag-108m -3.OOE-01 1.30E+00 4.70E+00 SF 12449-03 31 Ag-l lOm -1.30E+00 2.50E+00 9.20E+00 SF L3449-03 31 Ba-140 2.80E+00 2.80E+00 9.80E3+00 SF L3449-03 31 Be-7 2.OOE+01 1.40E-+01 4.60E+0I SF L3449-03 31 Ce-141 -4.80E+00 2.20E+00 8.1OE+00 SF L3449-03 31 Ce-144 1.18E+01 7.80E+00 2.60E+0O SF L3449-03 31 Co-57 -8.OOE-0 1.OOE+O0 3.50E+00 SF 12449-03 31 Co-58 -4.OOE-01 1.70E+00 6.10E+00 SF L3449-03 31 Co-60 -1.40E+00 2.00E+00 7.60E+00 SF 12449-03 31 Cr-51 -1.80E+01 1.50E+01 5.40E+0O SF 12449-03 31 Cs-134 1.40E+00 1.70E+00 5.90E+00 SF L3449-03 31 Cs-137 -3.90E+00 1.80E+00 7.1OE+00 SF L3449-03 31 Fe-59 -7.30E+00 4.60E+00 1.80E+Ot SF L3449-03 31 1-131 5.00E-01 2.90E-01 8.30E-01 SF 12449-03 31 K-40 1.48E+03 6.90E+01 9.30E+0I SF 12449-03 31 La-140 3.20E+00 3.20E+00 I.IOE+01 SF W3449-03 31 Mn-54 0.OOE+00 1.80E+00 6.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-l 14

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SF L3449-03 31 Nb-95 -2.20E+00 2.10E+00 7.70E+00 SF L3449-03 31 Ru-103 -3.20E+00 1.60E+00 6.20E+0O SF L3449-03 31 Ru-106 4.OOE+00 1.60E+01 5.40E+OI SF L3449-03 31 Sb-124 3.1OE+00 3.70E+00 1.30E+01 SF L3449-03 31 Sb-125 2.30E+00 4.10E+00 1.40E+01 SF L3449-03 31 Se-75 2.60E+O0 l.90E+00 6.1OE+00 SF L3449-03 31 Zn-5 -9.OOE-01 4.40E+00 1.60E+01 SF L3449-03 31 Zr-95 2.70E+00 2.90E+00 9.90E+00 LF L3449-04 31 AcTh-228 7.50E+00 7.OOE+00 2.30E+0O LF L3449-04 31 Ag-108m 2.OOE-01 1.40E+00 4.70E+OO LF L3449-04 31 Ag-Il0m 1.OOE+00 2.50E+00 8.60E+00 LF L3449-04 31 Ba-140 -5.OOE-01 3.OOE+00 I.IOE+01 LF L3449-04 31 Be-7 I.OOE+01 1.20E+01 4.20E+01 LF L3449-04 31 Ce-141 -6.OOE-01 2.30E+00 7.80E+OO LF L3449-04 31 Ce-144 -I.OOE+O0 7.70E+00 2.60E+0O LF L3449-04 31 Co-57 3.OOE-02 9.90E-01 3.40E+0O LF L3449-04 31 Co-58 7.OOE-01 1.50E+00 5.40E+O0 LF L3449-04 31 Co-60 -1.OOE-01 1.80E+00 6.80E+O0 LF L3449-04 31 Cr-51 -1.30E+01 I.50E+0 5.40E+01 LF L3449-04 31 Cs-134 -1.40E+00 2.OOE+00 7.40E+00 LF L3449-04 31 Cs-137 3.80E+00 1.80E+0O 5.70E+00 LF L3449-04 31 Fe-59 3.30E+00 4.20E+C0 1.50E+0O LF L3449-04 31 1-131 3.40E-01 2.60E-01 8.30E-01 LF L3449-04 31 K-40 1.46E+03 6.80E+01 9.80E+0I LF L3449-04 31 La-140 -6.OOE-01 3.40E+00 1.30E+0O LF L3449-04 31 Mn-54 2.30E+00 1.60E+00 5.50E+OO LF L3449-04 31 Nb-95 1.50E+00 2.OOE+00 6.70E+OO LF L3449-04 31 Ru-103 -1.70E+00 1.60E+00 5.90E+00 LF L3449-04 31 Ru-106 O.OOE+00 1.50E+01 5.20E+0I LF L3449-04 31 Sb-124 5.40E+00 4.1OE+00 1.40E+01 LF L3449-04 31 Sb- 125 4.30E+00 4.40E+00 1.50E+01 LF L3449-04 31 Sc-75 -3.40E+00 1.90E+00 7.OOE+00 LF L3449-04 31 Zn-65 3.70E+00 4.40E+00 1.50E+O1 LF L3449-04 31 Zr-95 -1.9OE+00 2.80E+O0 l.1OE+O1 WF L3449-05 31 Aclb-228 -1.30E+0O 5.20E+00 1.80E+01 WF L3449-05 31 Ag-108m -1.72E+00 9.90E-01 3.60E+00 WF L3449-05 31 Ag-I lOm -1.80E+00 1.70E+00 6.20E+00 WF L3449-05 31 Ba-140 -2.30E+00 2.30E+00 8.80E+0O WF L3449-05 31 Be-7 1.49E+01 9.20E+00 3.OOE+0O WF L3449-05 31 Ce-141 3.60E+00 1.80E+00 6.OOE+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-l 15

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WF L3449-05 31 Ce-144 4.00E+00 6.70E+00 2.30E+01 -

WF L3449-05 31 Co-57 -2.17E+00 8.60E-01 3. 10E+00 WF L3449-05 31 Co-58 -1.70E+00 1.30E+00 4.70E+00 WF L3449-05 31 Co-60 1.70E+00 1.30E+00 4.30E+00 WF L3449-05 31 Cr-51 -1.OOE+01 1.1OE+0I 4.00E+01 WF L3449-05 31 Cs-134 -1.00E+00 1.30E+00 4.80E+00 WF L3449-05 31 Cs-137 -2.00E-0l 1.30E+00 4.50E+00 WF L3449-05 31 Fe-59 -2.40E+00 3.10+00 1.1OE+01 WF L3449-05 31 1-131 1.50E-01 2.00E-01 8.00E-01 WF L3449-05 31 K-40 1.44E+03 4.90E+01 6.00E+01 WF L3449-05 31 La-140 -2.70E+00 2.70E+00 1.00+01 WF L3449-05 31 Mn-54 4.00E-01 1.30E+00 4.40E+00 WF L3449-05 31 Nb-95 -3.40E+00 I .50E+00 5.80E+00 WF L3449-05 31 Ru-103 6.00E-01 1.40E+00O 4.70E+00 WF L3449-05 31 Ru-106 -6.OOE+00 1.20E+01 4.30E+01 WF L3449-05 31 Sb-124 -3.20E+00 2.902+00 1.10+01 WF L3449-05 31 Sb-125 -2.00E-01 3.20E+00 1.10+01 WF L3449-05 31 Se-75 1.1OE+00 1.50E+00 5.00E+00 WF L3449-05 31 Zn-65 -1.50E+00 2.80E+00 1.OOE+01 WF L3449-05 31 Zr-95 -2.00E-01 2.10E+00 7.50E+00 GTF L3560-01 33 AcTh-228 -7.50E+00 4.90E+00 1.90E+01 GTF L3560-01 33 Ag-108m I .40E+00 l.1OE+00 3.80E+00 GTF L3560-01 33 Ag-I lOm -4.00E-01 1.70E+00 6.10E+00 GTF L3560-01 33 Ba-140 -3.00E-01 1.50E+00 6.00E+00 GTF L3560-01 33 Be-7 6.30E+00 9.40E+00 3.30E+01 GTF L3560-01 33 Cc-141 -4.40E+00 2.30E+00 8.20E+00 GTF L3560-01 33 Ce- 144 -2.00E+00 8.50E+00 2.90E+01 GTF L3560-01 33 Co-57 1.lOE+00 1.00+00 3.50E+00 GTF L3560-01 33 Co-58 -9.OOE-01 1.40E+00 5. 102+00 GTF L3560-01 33 Co-60 -4.00E-01 1.20E+00 4.50E+00 GTF L3560-01 33 Cr-51 3.00E+00 1.20E+01 4.00E+01 GTF L3560-01 33 Cs-134 -1.60E+00 I .30E+00 5.20E+00 GTF L3560-01 33 Cs-137 1.20E+00 1.30E+00 4.40E+00 GTF L3560-01 33 Fe-59 -7.00E-01 3.40E+00 1.20E+01 GTF L3560-01 33 1-131 -1.40E-01 l.1OE-01 8.20E-01 GTF L3560-01 33 K-40 1.47E+03 5.60E+01 6.20E+01 GTF L3560-01 33 La- 140 -4.00E-01 1.80E+00 6.90E+00 GTF L3560-01 33 Mn-54 -I.OOE-01 1.20E+00 4.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X-standard deviation)

D-1 16

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

GTF L3560-01 33 Nb-95 -2.30E+00 1.301+00 5.10E+00 GTF L3560-01 33 Ru-103 -8.00E-01 1.30E+00 4.70E+00 GTF L3560-01 33 Ru-106 -1.OOE+00 l.1OE+01 4.10E+01 GTF L3560-01 33 Sb-124 2.00E+00 2.80E+00 1.002+01 GTF L3560-01 33 Sb-125 -4.00E+00 3.20E+00 1.20E+01 GTF L3560-01 33 Se-75 -1.40E+00 1.70E+00 6.102+00 GTF L3560-01 33 Zn-65 -7.90E+00 3.80E+00 1.50+01 GTF L3560-01 33 Zr-95 -3.00E+00 2.10E+00 8.30E+00 MR L3560-02 33 AcTh-228 1.45E+01 6.70E+00 2.10E+01 MR L3560-02 33 Ag-108m -1.IOE+00 1.30E+00 4.90E+00 MR L3560-02 33 Ag-l lOm 4.20E+00 2.50E+00 8.30E+00 MR L3560-02 33 Ba-140 -2.30E+00 1.90E+00 8.50E+00 MR L3560-02 33 Be-7 9.00E+00 1.40E+01 4.80E+01 MR L3560-02 33 Ce-141 3.60E+00 3.30E+00 1.10+01 MR L3560-02 33 Ce-144 -1.60E+01 1.20E+01 4.20E+0O MR L3560-02 33 Co-57 -1.20E+00 1.60E+00 5.40E+00 MR U3560-02 33 Co-58 1.90E+00 1.80E+00 6.00E+00 MR U 560-02 33 Co-60 1.lOE+00 1.40E+00 5.10E+00 MR L3560-02 33 Cr-51 2.40E+01 1.60E+01 5.30E+0O MR L3560-02 33 Cs-134 -2.40E+00 1.80E+00 7.00E+00 MR U3560-02 33 Cs-137 2.80E+00 1.50E+00 4.90E+00 MR L3560-02 33 Fe-59 -9.OOE-0O 4.00E+00 1.50E+01 MR L3560-02 33 1-131 7.OOE-0O 3.60E-01 9.30E-01 MR L3560-02 33 K-40 1.89E+03 7.50E+OI 6.60E+01 MR L3560-02 33 La-140 -2.70E+00 2.20E+00 9.80E+00 MR L3560-02 33 Mn-54 -6.OOE-0O 1.70E+00 6.10E+00 MR L3560-02 33 Nb-95 -4.OOE-01 1.80E+00 6.60E+00 MR L3560-02 33 Ru-103 2.OOE-01 1.80E+00 6.30E+00 MR L3560-02 33 Ru-106 8.00E+00 l .50E+0O 5.20E+01 MR L3560-02 33 Sb- 124 -3.OOE-01 2.30E+00 9.70E+00 MR L3560-02 33 Sb-125 l.OOE+00 4.30E+00 1.50+01 MR L3560-02 33 Se-75 -2.40E+00 2.20E+00 7.80E+00 MR L3560-02 33 Zn-65 -9.50E+00 4.30E+00 1.70E+01 MR L3560-02 33 Zr-95 4.30E+00 3.00E+00 9.90E+00 SF L3560-03 33 AcTh-228 4.50E+00 7.90E+00 2.80E+01 SF L3560-03 33 Ag-108m 3.OOE-0O 1.40E+00 5. 10E+00 SF L3560-03 33 Ag-I lOm 1.60E+00 2.80E+00 9.80E+00 SF L3560-03 33 Ba-140 -2.70E+00 3.00E+00 1.30E+01 SF L3560-03 33 Be-7 -2.00E+00 1.40E+01 5.00E+01 SF L3560-03 33 Ce-141 1.IOE+00 2.60E+00 9.00E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-117

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SF L3560-03 33 Ce-144 4.00E+00 1.00E+01 3.60E+0I SF L3560-03 33 Co-57 -1.40E+00 1.30E+00 4.70E+00 SF W3560-03 33 Co-58 0.00+00 1.80E+00 6.50E+00 SF - 3560-03 33 Co-60 4.90E+00 1.80E+00 5.OOE+00 SF L3560-03 33 Cr-51 -6.00E2+00 1.60E+01 5.60E+01 SF L3560-03 33 Cs-134 1.50E+00 1.602+00 5.70E+00 SF L3560-03 33 Cs-137 1.30E+00 1.80E+00 6.40E+00 SF L3560-03 33 Fe-59 2.70E+00 4.80E+00 1.70E+01 SF L3560-03 33 1-131 7.60E-01 3.50E-01 8.70E-01 SF L3560-03 33 K-40 1.33E+03 7.50E+01 7.70E+0I SF 12560-03 33 La-140 -3.10E+00 3.50E+00 1.50E+01 SF W3560-03 33 Mn-54 5.00E-01 1.80E+00 6.50E+00 SF L3560-03 33 Nb-95 -1.50E+00 2.002+00 7.80E+00 SF L3560-03 33 Ru-103 -2.30E+00 1.80E+00 7.00E+00 SF L3560-03 33 Ru-106 4.OOE+00 1.30E+01 4.70E+01 SF W3560-03 33 Sb-124 1.1OE+00 3.20E+00 1.30E+01 SF 12560-03 33 Sb-125 6.40E+00 4.60E+00 1.501E+01 SF L3560-03 33 Se-75 -2.20E+00 2.10E+00 7.70E+00 SF L3560-03 33 Zn-65 -2.70E+00 4.40E+00 1.70E+01 SF L3560-03 33 Zr-95 -2.70E+00 3.1OE+00 1.20E+01 LF L3560-04 33 Aclh-228 -6.90E+00 4.70E+00 1.802+01 LF L3560-04 33 Ag-108m -7.00E-0 I.lOE+00 4.002+00 LF L3560-04 33 Ag-llOm 2.20E+00 1.70E+00 5.60E+00 LF 12560-04 33 Ba-140 7.00E-01 1.80E+00 6.60E+00 LF L3560-04 33 Be-7 9.30E+00 9.30E+00 3.20E+01 LF L3560-04 33 Ce-141 -3.80E+00 2.20E+00 8.OOE+00 LF L3560 04 33 Ce-144 -1.23E+01 8.10E+00 2.90E+01 LF 12560-04 33 Co-57 -1.80E+00 I.IOE+00 3.80E+00 LF W3560-04 33 Co-58 0.OOE+00 1.30E+00 4.60E+00 LF L3560-04 33 Co-60 -9.00-01 1.402+00 5.30E+00 LF L3560-04 33 Cr-51 3.00E+00 1.20E+01 4.30E+01 LF L3560-04 33 Cs-134 I.OOE+00 1.20E+00 4.10E+00 LF L3560-04 33 Cs-137 -1.602+00 1.30E+00 4.902+00 LF L3560-04 33 Fe-59 7.50E+00 3.40E+00 I.IOE+01 LF L3560-04 33 1-131 -4.00E-02 1.30E-01 8.40E-01 LF L3560-04 33 K-40 1.43E+03 5.50E+01 6.00E+OI LF L3560-04 33 La-140 8.00E-01 2.10E+00 7.50E+00 LF L3560-04 33 Mn-54 I.OOE+00 I.IOE+00 3.80E+00 LF L3560-04 33 Nb-95 -1.40E+00 1.30E+00 5.IOE+00 LF L3560-04 33 Ru-103 -2.20E+00 1.20E+00 4.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-1 18

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LF L3560-04 33 Ru-106 -8.00E+00 I.IOE+01 4.00E+01 LF L3560-04 33 Sb-124 -2.OOE+00 2.10E+00 9.00E+00 LF L3560-04 33 Sb-125 -4.50E+00 3.20E+00 1.20E+01 LF L3560-04 33 Sc-75 3.00E-01 1.60E+00 5.70E+00 LF L3560-04 33 Zn-65 -2.00E+00 3.50E+00 1.30E+01 LF L3560-04 33 Zr-95 1.60E+00 2.00E+00 7.10E+00 WF L3560-05 33 AcTh-228 -2.60E+00 4.50E+00 1.70E+01 WF L3560-05 33 Ag-108m -4.OOE-01 1.lOE+00 3.90E+00 WF L3560-05 33 Ag- lOim O.OOE+00 1.50E+00 5.50E+00 WF L3560-05 33 Ba-140 - I.OOE+00 1.60E+00 6.70E+00 WF L3560-05 33 Be-7 -4.30E+00 9.80E+00 3.60E+01 WF L3560-05 33 Ce-141 -3.10E+00 2.20E+00 7.80E+00 WF L3560-05 33 Ce-144 -9.OOE+00 8.OOE+00 2.90E+O1 WF L3560-05 33 Co-57 -8.00E-01 1.OOE+00 3.70E+00 WF L3560-05 33 Co-58 9.OOE-01 1.20E+00 4. 10E+00 WF L3560-05 33 Co-60 -2.00E-01 1.30E+00 4.80E+00 WF L3560-05 33 Cr-51 -2.40E+01 1.20E+01 4.60E+01 WF L3560-05 33 Cs-134 1.20E+00 1.20E+00 4.1OE+00 WF L3560-05 33 Cs-137 1.70E+00 1.30E+00 4.30E+00 WF L3560-05 33 Fe-59 1.50E+00 2.60E+00 9.10E+00 WF L3560-05 33 1-131 2.20E-01 2.30E-01 8.60E-01 WF L3560-05 33 K40 1.29E+03 5.40E+01 6.00E+01 WF L3560-05 33 La-140 -1.20E+00 1.90E+00 7.70E+00 WF L3560-05 33 Mn-54 -6.OOE-01 1.20E+00 4.40E+00 WF L3560-05 33 Nb-95 1.50E+00 1.30E+00 4.40E+00 WF L3560-05 33 Ru-103 -7.OOE-01 1.20E+00 4.50E+00 WF L3560-05 33 Ru-106 I.OOE+00 1.10E+01 3.90E+01 WF L3560-05 33 Sb-124 2.70E+00 2.20E+00 7.60E+00 WF L3560-05 33 Sb-125 -6.OOE-01 3.00E+00 I.1OE+01 WF L3560-05 33 Se-75 2.OOE-01 1.70E+00 5.90E+00 WF L3560-05 33 Zn-65 -4.OOE-01 3.102E+00 1.10E+01 WF L3560-05 33 Zr-95 -2.OOE-0O 2.00E+00 7.50E+00 GTF L3685-01 35 AcTh-228 7.60E+00 4.10E+00 1.70E+01 GTF L3685-01 35 Ag-108m 6.60E-0O 8.20E-01 2.80E+00 GTF L3685-01 35 Ag- lOim -6.00E-01 1.60E+00 5.80E+00 GTF L3685-01 35 Ba-140 -1.20E+00 2.30E+00 8.30E+00 GTF L3685-01 35 Be-7 -7.30E+00 8.40E+00 3.00E+01 GTF L3685-01 35 Ce-141 4.00E-01 1.20E+00 4.00E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-1 19

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

GTF L3685-01 35 Ce-144 -3.00E-01 5.00E+00 1.70E+0I GTF L3685-01 35 Co-57 6.60E-01 6.30E-01 2.IOE+00 GTF L3685-01 35 Co-58 3.00E-01 1.00+00 3.50E+00 GTF L3685-01 35 Co-60 1.40E+00 1.50E+00 5.OOE+00 GTF L3685-01 35 Cr-51 -4.60E+00 9.90E+00 3.40E+01 GTF L3685-01 35 Cs-134 -4.00E-O1 I.IOE+00 3.90E+00 GTF L3685-01 35 Cs-137 1.70E+00 1.IOE+00 3.60E+00 GTF L3685-01 35 Fe-59 -7.40E+00 4.00E+00 I.50E+O1 GTF L3685-01 35 1-131 4.60E-01 2.90E-01 9.00E-01 GTF L3685-01 35 K-40 1.44E+03 4.30E+01 5.80E+01 GTF L3685-01 35 La-140 -1.30E+00 2.60E+00 9.50E+00 GTF L3685-01 35 Mn-54 -2.60E+00 1.20E-+00 4.30E+00 GTF L3685-01 35 Nb-95 -2.80E+00 1.50E+00 5.50E+00 GTF L3685-01 35 Ru-103 -6.00E-01 1.IO0+00 3.80E+00 GTF 12685-01 35 Ru-106 -1.70E+01 1.00+01 3.60E+0l GTF L3685-01 35 Sb-124 -1.90E+00 2.402+00 9.20E+00 GTF L3685-01 35 Sb-125 3.OOE-01 2.40E+00 8.302+00 GTF L3685-01 35 Se-75 O.OOE+00 1.20E+00 4.20E+00 GTF L3685-01 35 Zn-65 -4.00E-01 2.70E+00 9.50E+00 GTF L3685-01 35 Zr-95 O.OOE+00 1.80E+00 6.40E+00 MR L3685-02 35 AcTh-228 4.60E+00 6.OOE+00 2.00E+01 MR L3685-02 35 Ag-108m -1.30E-01 9.80E-01 3.40E+00 MR L3685-02 35 Ag-lOrm 1.20E+00 1.90E+00 6.60E+00 MR L3685-02 35 Ba-140 -2.20E+00 3.00E+00 I.IOE+0I MR L3685-02 35 Be-7 7.00E+00 1.10+01 3.70E+0I MR L3685-02 35 Ce-141 -4.60E+00 1.80E+00 6.40E+00 MR L3685-02 35 Ce-144 4.OOE-01 6.20E+00 2.l10E+I01 MR L3685-02 35 Co-57 6.OOE-02 7.80E-01 2.70E+00 MR L3685-02 35 Co-58 -7.00E-01 1.40E+00 5.00E+00 MR L3685-02 35 Co-60 7.00E-01 1.90E+00 6.60E+00 MR L3685-02 35 Cr-51 1.40E+01 1.30E+01 4.202+01 MR L3685-02 35 Cs-134 1.80E+00 1.40E+00 4.80E+00 MR L3685-02 35 Cs-137 -I.OOE-01 1.50E+00 5.10E+00 MR L3685-02 35 Fe-59 7.10+00 4.80E+00 1.60E+01 MR L3685-02 35 1-131 5.00E-02 I.90E-01 9.30E-0I MR L3685-02 35 K-40 1.72E+03 5.60E+01 7.OOE+01 MR L3685-02 35 La-140 -2.60E+00 3.40E+00 1.30E+01 MR L3685-02 35 Mn-54 3.00E-01 1.40E+00 4.80E+00 MR L3685-02 35 Nb-95 -5.20E+00 1.802+00 6.80E+00 MR L3685-02 35 Ru-103 8.00E-01 1.40E+00 4.60E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-120

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR L3685-02 35 Ru-106 -8.00E+00 1.30E+01 4.40E+01 MR L3685-02 35 Sb-124 -3.80E+00 4.10E+00 I.SOE+01 MR L3685-02 35 Sb-125 -3.30E+00 2.90E+00 I.1OE+01 MR L3685-02 35 Se-75 5.OOE-01 1.50E+00 5.10E+00 MR L3685-02 35 Zn-65 -1.IOE+00 3.50E+00 1.30E+01 MR L3685-02 35 Zr-95 2.80E+00 2.40E+00 8.OOE+00 SF L3685-03 35 AcTh-228 -4.20E+00 4.80E+00 1.80E+01 SF L3685-03 35 Ag-108m 8.OOE-0 L.OOE+00 3.40E+00 SF L3685-03 35 Ag-I lOm -3.OOE-01 I.90E+00 6.70E+00 SF L3685-03 35 Ba-140 -1.60E+00 2.40E+00 9.20E+00 SF L3685-03 35 Be-7 -2.OOE+O0 I.IOE+0I 3.90E+0O SF L3685-03 35 Ce-141 I.OOE+00 2.20E+00 7.50E+00 SF L3685-03 35 Ce-144 3.20E+00 6.70E+00 2.30E+0O SF L3685-03 35 Co-57 -1.41E+00 9.OOE-01 3.20E+00 SF L3685-03 35 Co-58 1.OOE-0 1.30E+00 4.40E+00 SF L3685-03 35 Co-60 9.OOE-01 1.50E+00 5.10E+00 SF L3685-03 35 Cr-51 -1.20E+01 1.30E+01 4.70E+0O SF L3685-03 35 Cs-134 -I.OOE-0 1.20E+00 4.40E+OO SF L3685-03 35 Cs-137 4.OOE-01 1.40E+00 4.70E+00 SF L3685-03 35 Fe-59 4.50E+00 3.70E+00 1.20E+01 SF L3685-03 35 1-131 8.OOE-02 2.10E-01 9.1OE-0O SF L3685-03 35 K-40 1.19E+03 4.50E+01 6.30E+01 SF L3685-03 35 La-140 -1.80E+00 2.80E+00 I.IOE+01 SF L3685-03 35 Mn-54 -1.60E+00 1.30E+00 4.90E+00 SF L3685-03 35 Nb-95 5.OOE-01 1.60E+00 5.60E+00 SF L3685-03 35 Ru-103 3.OOE-01 1.30E+00 4.60E+00 SF L3685-03 35 Ru-106 -5.OOE+00 1.20E+01 4.30E+01 SF L3685-03 35 Sb-124 -1.40E+00 3.50E+00 1.30E+0O SF L3685-03 35 Sb-125 -4.OOE-01 3.OOE+00 I.OOE+0I SF L3685-03 35 Se-75 1.80E+00 1.60E+00 5.20E+00 SF L3685-03 35 Zn-65 -3.80E+00 3.30E+00 1.20E+0O SF L3685-03 35 Zr-95 3.30E+00 2.20E+00 7.20E+00 LF L3685-04 35 AcTh-228 7.50E+00 5.60E+00 1.90E+01 LF W3685-04 35 Ag-108m O.OOE+00 9.60E-01 3.30E+00 LF L3685-04 35 Ag-l lOm -5.90E+00 2.OOE+00 7.60E+00 LF L3685-04 35 Ba-140 -4.00E-01 3.10E+00 I.IOE+OI LF L3685-04 35 Be-7 -3.OOE+00 L.OOE+01 3.60E+OI LF L3685-04 35 Ce-141 1.20E+00 1.80E+00 6.20E+00 LF L3685-04 35 Ce-144 3. 1OE+00 6.40E+00 2.10E+01 LF L3685-04 35 Co-57 -5.OOE-01 8.20E-01 2.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-121

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LF L3685-04 35 Co-58 L.OOE-OI 1.30E+00 4.70E+00 LF L3685-04 35 Co-60 7.OOE-01 1.70E+00 5.80E+O0 LF L3685-04 35 Cr-51 -1.30E+01 1.20E+01 4.40E+01 LF L3685-04 35 Cs-134 -8.00E-01 1.40E+00 5.10E+00 LF L3685-04 35 Cs-137 -1.20E+00 1.40E+00 5.00E+O0 LF L3685-04 35 Fe-59 -1.27E+01 5.20E+00 2.OOE+01 LF L3685-04 35 1-131 2.40E-01 2.60E-01 9.60E-0I LF L3685-04 35 K-40 1.32E+03 5.00E3+01 7.30E+01 LF L3685-04 35 La-140 -4.OOE-01 3.50E+00 1.30E+01 LF L3685-04 35 Mn-54 -1.OOE+00 1.30E+00 4.SOE+00 LF L3685-04 35 Nb-95 -4.OOE-01 1.60E+00 5.70E+00 LF W3685-04 35 Ru-103 8.00E-01 1.30E+00 4.40E+00 LF L3685-04 35 Ru-106 -1.60E+01 1.20E+01 4.40E+01 LF L3685-04 35 Sb-124 -1.40E+00 3.20E+00 1.20E+01 LF L3685-04 35 Sb-125 -3.90E+00 3.20E+00 1.IOE+01 LF L3685-04 35 Se-75 1.80E+00 1.50E+00 5.00E+00 LF L3685-04 35 Zn-65 -8.00E-01 3.30E+00 1.20E+01 LF L3685-04 35 Zr-95 -3.50E+00 2.50E+00 9.40E+00 WF L3685-05 35 AcTh-228 -6.102+00 5.60E+00 2.OOE+0I WF L3685-05 35 Ag-108m l.OOE-01 I.IOE+00 3.80E+OO WF L3685-05 35 Ag-llOm -9.OOE-0 I.90E+00 6.80E+00 WF L3685-05 35 Ba-140 -7.00E-01 2.80E+00 I.OOE+01 WF U3685 35 Be-7 1.60E+01 1.20E+01 3.90E+01 WF L3685-05 35 Ce-141 1.90E+00 2.20E+00 7.30E+00 WF L3685-05 35 Ce-144 -3.80E+00 7.20E+00 2.50E+01 WF L3685-05 35 Co-57 1.31E+00 9.1OE-01 3.00E+00 WF L3685-05 35 Co-58 2.00E-01 1.40E+00 5.00+E+0 WF L3685-05 35 Co-60 1.OOE-01 1.70E+00 6.00E+00 WF L3685-05 35 Cr-51 -1.40E+01 1.40E+01 5.10E+01 WF L3685-05 35 Cs-134 2.002-01 1.302+00 4.70E+00 WF L3685-05 35 Cs-137 -4.00E-01 1.402+00 5.102+00 WF W3685-05 35 Fe-59 3.40E+00 4.70E+00 1.60E+01 WF L3685-05 35 1-131 7.50E-01 3.60E-01 9.90E-01 WF L3685-05 35 K-40 1.33E+03 5.1OE+0I 7.00+E+1 WF L3685-05 35 La-140 -9.OOE-01 3.20E+00 1.20E+01 WF L3685-05 35 Mn-54 -2.10E+00 1.40E+00 5.10E+00 WF L3685-05 35 Nb-95 -1.80E+00 1.70E+00 6.30E+00 WF L3685-05 35 Ru-103 -3.40E+00 1.50E+00 5.80E+00 WF L3685-05 35 Ru-106 3.00E+00 1.30E+01 4.40E+01 WF L3685-05 35 Sb-124 O.OOE+00 3.40E+00, 1.20E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-122

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WF L3685-05 35 Sb-125 -2.20E+00 3.20E+00 1.20E+01 WF L3685-05 35 Se-75 1.OOE-0 1.70E+00 5.90E+00 WF L3685-05 35 Zn-65 2.40E+00 3.10E+0O 1.IOE+01 WF L3685-05 35 Zr-95 2.60E+00 2.40E+00 8.10E+00 GTF L3798-01 37 AcTh-228 -4.80E+00 5.60E+00 2.10E+0O GTF L3798-01 37 Ag-108m -6.OOE-01 1.1OE+00 3.90E+00 GTF L3798-01 37 Ag-I1lm 2.OOE+00 1.90E+00 6.50E+OO GTF L3798-01 37 Ba-140 4.OOE-01 2.10E+00 7.70E+OO GTF L3798-01 37 Be-7 -8.OOE+00 l.OOE+0 3.70E+0O GTF L3i98-01 37 Ce-141 -I.IOE+00 2.10E+00 7.40E+00 GTF L3798-01 37 Ce-144 -8.40E+00 7.60E+00 2.70E+01 GTF L3798-01 37 Co-57 -I.IOE-OI 9.50E-01 3.30E+00 GTF L3798-01 37 Co-58 -7.OOE-01 1.40E+00 5.10E+00 GTF L3798-01 37 Co-60 -1.80E+00 1.80E+00 6.80E+00 GTF L3798-01 37 Cr-51 1.80E+01 1.20E+01 4.OOE+01 GTF L3798-01 37 Cs-134 I.OOE+O0 1.40E+00 5.OOE+0O GTF L3798-01 37 Cs-137 -1.20E+00 1.40E+00 5.20E+00 GTF L3798-01 37 Fe-59 1.20E+00 3.10E+0O 1.IOE+01 GTF L3798-01 37 1-131 O.OOE+00 1.80E-01 9.10E-01 GTF L3798-01 37 K-40 1.41E+03 5.90E+01 6.60E+0I GTF L3798-01 37 La-140 5.OOE-01 2.40E+00 8.90E+00 GTF L3798-01 37 Mn-54 2.OOE-01 1.30E+00 4.70E+00 GTF L3798-01 37 Nb-95 -2.90E+00 1.50E+00 6.OOE+00 GTF L3798-01 37 Ru-103 O.OOE+00 1.30E+00 4.70E+00 GTF L3798-0l 37 Ru-106 6.OOE+00 I.IOE+01 3.90E+0O GTF L3798-01 37 Sb-124 -2.50E+00 2.90E+00 1.20E+01 GTF L3798-01 37 Sb-125 2.40E+00 3.40E+00 1.20E+01 GTF L3798-01 37 Se-75 I.IOE+00 1.60E+00 5.50E+00 GTF L3798-01 37 Zn-65 -2.OOE+00 3.30E+00 1.20E+01 GTF L3798-01 37 Zr-95 1.20E+00 2.20E+00 7.70E+00 MR L3798-02 37 AcTh-228 3.50E+00 4.60E+00 1.60E+0O MR L3798-02 37 Ag-108m 6.40E-01 9.50E-01 3.30E+00 MR L3798-02 37 Ag-I lOm -7.OOE-01 1.40E+00 5.20E+00 MR L3798-02 37 Ba-140 -1.20E+00 1.70E+00 6.90E+OO MR L3798-02 37 Be-7 2.OOE+00 9.20E+00 3.30E+0O MR L3798-02 37 Ce-141 -2.30E+00 2.10E+00 7.40E+00 MR L3798-02 37 Ce-144 1.72E+01 7.70E+00 2.50E+01 MR L3798-02 37 Co-57 1.09E+00 9.50E-01 3.20E+OO

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-123

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR L3798-02 37 Co-58 -7.00E-01 I.IOE+00 4.20E+00 MR L3798-02 37 Co-60 I.IOE+00 1.40E+00 4.80E+O0 MR L3798-02 37 Cr-51 -6.OOE+00 1.20E+01 4.20E+01 MR L3798-02 37 Cs-134 1.20E+00 1.30E+00 4.40E+00 MR L3798-02 37 Cs-137 3.OOE-01 1.30E+00 4.70E+00 MR L3798-02 37 Fe-59 2.70E+00 3.20E+00 1.1OE+01 MR L3798-02 37 1-131 2.50E-01 2.60E-01 9.70E-01 MR L3798-02 37 K-40 1.90E+03 6.OOE+01 4.80E+01 MR L3798-02 37 La-140 -1.40E+00 1.90E+00 7.90E+00 MR L3798-02 37 Mn-54 -8.OOE-01 1.IOE+00 4.OOE+00 MR L3798-02 37 Nb-95 -6.OOE-01 1.20E+00 4.50E+00 MR L3798-02 37 Ru-103 -5.OOE-01 1.20E+00 4.50E+00 MR L3798-02 37 Ru-106 4.OOE+00 1.1OE+0 3.80E+01 MR L3798-02 37 Sb-124 I.OOE+00 2.20E+00 8.20E+00 MR L3798-02 37 Sb-125 -3.10E+00 2.60E+00 9.90E+00 MR L3798-02 37 Se-75 I.OOE-01 1.30E+00 4.70E+00 MR L3798-02 37 Zn-65 6.OOE-01 3.OOE+00 I.IOE+0O MR L3798-02 37 Zr-95 1.80E+00 2.20E+00 7.70E+00 SF L3798-03 37 AcTh-228 2.50E+00 5.OOE+00 1.70E+01 SF L3798-03 37 Ag-108m -I.IOE+00 I.OOE+00 3.70E+00 SF L3798-03 37 Ag-ll0m 1.20E+00 1.70E+00 6.OOE+00 SF L3798-03 37 Ba-140 -5.OOE-01 2.OOE+00 7.70E+00 SF W3798-03 37 Be-7 1.40E+0I I.OOE+01 3.40E+01 SF L3798-03 37 Ce-141 -7.50E+00 2.50E+00 9.10E+O0 SF 12798-03 37 Ce-144 1.66E+01 8.70E+00 2.90E+0O SF 12798-03 37 Co-57 1.40E+00 1.IOE+00 3.70E+00 SF 12798-03 37 Co-58 -3.OOE-01 I.IOE+00 4.OOE+00 SF L3798-03 37 Co-60 -4.OOE-01 1.50E+00 5.30E+00 SF L3798-03 37 Cr-51 7.OOE+00 1.30E+01 4.30E+0I SF L3798-03 37 Cs-134 1.30E+00 1.30E+00 4.50E+00 SF W3798-03 37 Cs-137 1.40E+00 1.20E+00 3.90E+00 SF 12798-03 37 Fe-59 1.50E+00 2.90E+00 I.OOE+0O SF L3798-03 37 1-131 1.70E-01 2.30E-01 9.40E-0O SF L3798-03 37 K-40 1.24E+03 4.80E+01 5.40E+0I SF L3798-03 37 La-140 -6.OOE-01 2.30E+00 8.80E+00 SF L3798-03 37 Mn-54 -7.OOE-01 1.20E+00 4.50E+00 SF L3798-03 37 Nb-95 Q.OOE+0O 1.50E+00 5.20E+00 SF L3798-03 37 Ru-103 9.OOE-01 1.30E+00 4.60E+00 SF 12798-03 37 Ru-106 -6.80E+00 9.60E+00 3.50E+01 SF L3798-03 37 Sb-124 1.80E+00 2.70E+00 9.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-124

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SF L3798-03 37 Sb-125 -2.20E+00 2.90E+00 I .OOE+0O SF L3798-03 37 Se-75 -l.OOE-0O 1.60E+O0 5.60E+00 SF L3798-03 37 Zn-65 -6.40E+00 2.80E+00 l.lOE+0O SF L3798-03 37 Zr-95 -3.30E+00 2.30E+00 8.70E+00 LF L3798-04 37 AcTh-228 9.40E+00 4.90E+00 1.60E+0O LF L3798-04 37 Ag-108m 4.OOE-0O I.IOE+00 3.80E+O0 LF L3798-04 37 Ag-I lOm -3.70E+00 1.90E+00 7.50E+00 LF L3798-04 37 Ba-140 -1.20E+00 1.70E+00 7.10E+O0 LF L3798-04 37 Be-7 1.20E+O1 L.IOE+OI 3.70E+01 LF L3798-04 37 Ce-141 -3.90E+00 2.60E+00 9.30E+00 LF L3798-04 37 Ce-144 O.OOE+00 8.70E+00 3.OOE+01 LF L3798-04 37 Co-57 -1.20E+00 1.20E+00 4.10E+00 LF L3798-04 37 Co-58 -3.00E-01 1.30E+00 4.90E+00 LF L3798-04 37 Co-60 I.OOE+00 1.80E+00 6.IOE+00 LF L3798-04 37 Cr-51 3.50E+01 1.30E+01 4.20E+0I LF L3798-04 37 Cs-134 1.30E+00 1.20E+00 4.20E+00 LF L3798-04 37 Cs-137 1.50E+00 1.30E+00 4.50E+00 LF L3798-04 37 Fe-59 -4.20E+00 3.20E+00 1.20E+0O LF L3798-04 37 1-131 -1.90E-01 1.30E-01 9.90E-0O LF L3798-04 37 K-40 1.49E+03 5.70E+01 5.60E+0I LF L3798-04 37 La-140 -1.40E+00 I.90E+00 8.10E+00 LF L3798-04 37 Mn-54 -I.50E+00 1.20E+00 4.80E+00 LF L3798-04 37 Nb-95 2.OOE+00 2.70E+00 9.OOE+O0 LF L3798-04 37 Ru-103 -2.30E+O0 I.50E+00 5.80E+00 LF L3798-04 37 Ru-106 -2.IOE+01 1.20E+01 4.60E+OI LF L3798-04 37 Sb-124 -I.IOE+00 2.60E+00 I.IOE+OI LF L3798-04 37 Sb-125 -3.50E+00 3.30E+00 1.20E+01 LF L3798-04 37 Se-75 I.OOE+00 1.80E+00 6.30E+O0 LF L3798-04 37 Zn-65 7.50E+00 6.20E+00 2.1OE+O1 LF L3798-04 37 Zr-95 1.60E+00 2.30E+00 8.10E+O0 WF L3798-05 37 Aclb-228 6.60E+00 4.30E+00 1.40E+01 WF L3798-05 37 Ag-108m -1.OIE+O0 9.20E-01 3.40E+O0 WF L3798-05 37 Ag-I lOm -8.OOE-01 1.40E+00 5.40E+00 WF L3798-05 37 Ba-140 7.OOE-01 2.00E+00 7.40E+00 WF L3798-05 37 Be-7 O.OOE+OO I.OOE+0I 3.60E+OI WF L3798-OS 37 Ce-141 -2.50E+00 2.OOE+00 7.30E+OO WF L3798-05 37 Ce-144 5.20E+00 7.40E+00 2.50E+0O WF L3798-05 37 Co-57 3.50E-01 9.50E-01 3.30E+00 WF L3798-05 37 Co-58 -2.10E+00 1.20E+00 4.70E+00 WF L3798-05 37 Co-60 1.20E+00 1.70E+00 5.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-125

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WF L3798-05 37 Cr-51 -1.20E+01 1.IOE+0I 4.00E+01 WF L3798-05 37 Cs-134 1.80E+00 1.20E+00 4.10E+00 WF L3798-05 37 Cs-137 5.00E-01 1.30E+00 4.60E+00 WF L3798-05 37 Fe-59 -3.30E+00 2.80E+00 1.lOE+OI WF L3798-05 37 1-131 -4.OOE-02 1.50E-01 9.60E-01 WF L3798-05 37 K-40 1.42E+03 5.20E+01 5.002+01

WF L3798-05 37 La- 140 8.OOE-01 2.30E+00 8.60E+00 WF L3798-05 37 Mn-54 0.OOE+O0 l.OOE+00 3.80E+00 WF L3798-05 37 Nb-95 1.80E+00 1.30E+00 4.30E+00 WF L3798-05 37 Ru-103 -1.50E+00 1.30E+00 4.70E+00 WF L3798-05 37 Ru-106 5.OOE+00 1.lOE+01 3.70E+01 WF L3798-05 37 Sb-124 l.OOE+00 2.60E+00 9.50E+00 WF L3798-05 37 Sb-125 1.40E+00 2.70E+00 9.50E+00 WF L3798-05 37 Se-75 -2.OOE+00 1.50E+00 5.40E+00 WF L3798-05 37 Zn-65 1.90E+00 3.00E+00 l.OoE+0o WF L3798-05 37 Zr-95 3.30E+00 1.70E+00 5.30E+00 GTF L3923-01 39 AcTh-228 4.70E+00 6.20E+00 2.20E+01 GTF L3923-01 39 Ag-108m -1.10E+00 1.30E+00 4.90E+00 GTF 12923-01 39 Ag-l lOm 2.30E+00 2.30E+00 7.80E+00 GTF L3923-01 39 Ba-140 -2.50E+00 2.90E+00 1.20E+01 GTF L3923-01 39 Be-7 9.OOE+00 1.40E+01 4.80E+01 GTF L3923-01 39 Ce-141 -1.90E+00 3.40E+00 1.20E+01 GTF L3923-01 39 Ce-144 1.30E+01 1.20E+01 4.00E+01 GTF L3923-01 39 Co-57 -3.20E+00 1.50E+00 5.50E+00 GTF L3923-01 39 Co-58 1.50E+00 1.70E+00 5.90E+00 GTF L3923-01 39 Co-60 7.00E-01 1.80E+00 6.50E+00 GTF L3923-01 39 Cr-51 -4.00E+00 1.70E+01 5.90E+0I GTF U3923-01 39 Cs-134 O.OOE+00 1.80E+00 6.60E+00 GTF L3923-01 39 Cs-137 -4.00E-01 1.50E+00 5.70E+00 GTF L3923-01 39 Fe-59 3.90E+00 5.20E+00 1.80E+01 GTF L3923-01 39 1-13 l.OE-01 2.80E-01 9.80E-01 GTF L3923-01 39 K-40 1.48E+03 6.80E+01 7.50E+01 GTF L3923-01 39 La-140 -2.90E+00 3.30E+00 1.40E+01 GTF L3923-01 39 Mn-54 2.20E+00 1.70E+00 5.60E+00 GTF L3923-01 39 Nb-95 9.00E-01 2.OOE+00 7.10E+00 GTF L3923-01 39 Ru-103 3.70E+00 l.90E+00 6.00E+00 GTF L3923-01 39 Ru-106 -1.40E+01 1.50E+01 5.60E+01 GTF L3923-01 39 Sb- 124 2.00E-01 3.20E+00 1.30E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-126

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

GTF L3923-01 39 Sb-125 -4.OOE+00 3.60E+00 1.40E+0l GTF L3923-01 39 Se-75 -1.80E+00 2.20E+00 7.90E+O0 GTF L3923-01 39 Zn-65 3.10E+00 7.OOE+00 2.40E+Ol GTF L3923-01 39 Zr-95 1.90E+00 2.90E+00 l .OOE+0I MR L3923-02 39 AcTh-228 -1.50E+00 7.60E+O0 2.80E+Ol MR L3923-02 39 Ag-108m 3.20E+00 1.50E+00 4.60E+00 MR L3923-02 39 Ag-i lOmn -8.OOE-01 2.90E+O0 I. lOE+01 MR U923-02 39 Ba-140 -8.OOE-01 3.10E+O0 1.30E+01 MR L3923-02 39 Be-7 -1.70E+01 1.40E+OI 5.50E+01 MR L3923-02 39 Ce-141 3.60E+00 3.OOE+00 9.90E+00 MR L3923-02 39 Cc-144 1.90E+OI I.OOE+O1 3.30E+01 MR L3923-02 39 Co-57 1.40E+00 1.30E+00 4.30E+00 MR L3923-02 39 Co-58 -4.80E+00 1.80E+00 7.80E+00 MR L3923-02 39 Co-60 2.OOE+00 2.70E+00 9.30E+O0 MR L3923-02 39 Cr-51 -1.OOE+0O 1.60E+0O 6.OOE+01 MR L3923-02 39 Cs-134 -3.OOE-01 2.OOE+00 7.60E+00 MR . U923-02 39 Cs-137 -4.OOE-01 2.10E+00 7.50E+00 MR L3923-02 39 Fe-59 3.20E+00 6.40E+00 2.30E+01 MR U3923-02 39 1-131 3.40E-01 2.90E-OI l.OOE+00 MR L3923-02 39 K-40 1.72E+03 8.50E+O1 9.60E+01 MR L3923-02 39 La-140 -9.OOE-01 3.60E+00 1.50E+01 MR U3923-02 39 Mn-54 -1.80E+00 1.60E+OO 6.60E+O0 MR L3923-02 39 Nb-95 -1.80E+00 2.10E+O0 8.30E+O0 MR U3923-02 39 Ru-103 -2.40E+00 2.OOE+00 7.80E+O0 MR L3923-02 39 Ru-106 -1.80E+01 1.70E+0O 6.40E+01 MR L3923-02 39 Sb-124 -2.20E+00 4.60E+00 l.90E+01 MR L3923-02 39 Sb-125 6.10E+00 4.IOE+00 1.30E+01 MR L3923-02 39 Se-75 4.OOE-01 2.50E+00 8.60E+00 MR L3923-02 39 Zn-65 2.OOE+00 5.40E+00 l.90E+01 MR L3923-02 39 Zr-95 -I.OOE+00 3.90E+OO 1.40E+01 SF L3923-03 39 AcTh-228 8.OOE+00 5.30E+00 1.70E+0O SF L3923-03 39 Ag-108m -1.50E+00 I.IOE+00 4.20E+OO SF L3923-03 39 Ag-llOm -2.OOE+00 1.80E+00 7.OOE+OO SF L3923-03 39 Ba-140 5.OOE-01 2.50E+00 9.30E+O0 SF L3923-03 39 Be-7 -9.OOE+00 1.20E+01 4.50E+0I SF L3923-03 39 Ce-141 -2.OOE-01 2.50E+O0 8.60E+OO SF L3923-03 39 Ce-144 -6.70E+00 8.90E+O0 3.1OE+O1 SF L3923-03 39 Co-57 -4.OOE-0O I.IOE+O0 3.90E+00 SF L3923-03 39 Co-58 -7.OOE-01 1.20E+00 4.50E+OO SF L3923-03 39 Co-60 5.OOE-01 1.60E+00 5.90E+OO

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-127

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SF L3923-03 39 Cr-51 5.00E+00 1.40E+01 4.80E+01 SF L3923-03 39 Cs- 134 -1.40E+00 1.30E+00 5.20E+00 SF L3923-03 39 Cs-137 -7.00E-01 1.30E+00 4.90E+00 SF L3923-03 39 Fe-59 2.20E+00 4.80E+00 1.70E+01 SF L3923-03 39 1-131 1.60E-01 2.80E-01 I.OOE+OO SF L3923-03 39 K-40 1.28E+03 5.80E+01 7.00E+01 SF L3923-03 39 La-140 6.OOE-01 2.80E+00 I.IOE+01 SF L3923-03 39 Mn-54 1.40E+00 1.20E+00 4.20E+00 SF L3923-03 39 Nb-95 -4.00E-01 1.50E+00 5.60E+00 SF L3923-03 39 Ru-103 -1.20E+00 1.40E+00 5.20E+00 SF L3923-03 39 Ru-106 -2.00+OO0 1.10E+01 4.00E+01 SF L3923-03 39 Sb-124 1.30E+00 2.30E+00 8.60E+O0 SF L3923-03 39 Sb-125 -3.OOE+00 3.OOE+00 I.IOE+01 SF L3923-03 39 Se-75 -4.00E-01 1.90E+00 6.50E+00 SF L3923-03 39 Zn-65 -2.10E+00 3.30E+00 1.30E+01 SF L3923-03 39 Zr-95 -1.90E+00 2.30E+00 9.00E+00 LF L3923-04 39 AcTh-228 2.50E+00 5.10E+00 1.80E+01 LF L3923-04 39 Ag-108m 5.OOE-O1 1.20E+00 4.20E+00 LF L3923-04 39 Ag-I lOm -2.OOE+00 1.60E+00 6.40E+00 LF L3923-04 39 Ba-140 9.OOE-01 1.90E+00 7.20E+00 LF L3923-04 39 Be-7 -1.OOE+00 1.IOE+0 3.90E+01 LF L3923-04 39 Ce-141 I.OOE-01 2.60E+00 9.00E+00 LF L3923-04 39 Ce-144 8.00E+00 9.40E+00 3.20E+0I LF L3923-04 39 Co-57 8.00E-01 1.20E+00 4.10E+00 LF L3923-04 39 Co-58 6.00E-01 1.40E+00 5.1OE+00 LF L3923-04 39 Co-60 1.30E+00 1.40E+00 5.OOE+00 LF L3923-04 39 Cr-51 -6.00E+00 1.50E+01 5.30E+01 LF L3923-04 39 Cs-134 -1.50E+00 1.20E+00 5.00E+00 LF L3923-04 39 Cs-137 -2.80E+00 1.40E+00 5.50E+00 LF L3923-04 39 Fe-59 I.OOE+00 4.50E+00 1.60E+01 LF L3923-04 39 1-131 3.50E-01 2.90E-01 9.80E-01 LF L3923-04 39 K-40 1.45E+03 6.00E+01 5.50E+01 LF L3923-04 39 La-140 I.OOE+00 2.20E+00 8.20E+00 LF L3923-04 39 Mn-54 8.00E-01 1.IOE+00 3.90E+00 LF L3923-04 39 Nb-95 -2.502+00 1.60E+00 6.202+00 LF L3923-04 39 Ru-103 -3.10E+00 1.60E+00 6.20E+00 LF L3923-04 39 Ru-106 2.00E+01 1.20E+01 4.00E+01 LF L3923-04 39 Sb-124 3.90E+00 3.OOE+00 I.OOE+01 LF L3923-04 39 Sb-125 -5.40E+00 3.40E+00 1.30E+01 LF L3923-04 39 Se-75 -3.00E-01 1.60E+00 5.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-128

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LF L3923-04 39 Zn-65 2.90E+00 3.90E+0O I1.30E+01 LF L3923-04 39 Zr-95 3.OOE-01 2.30E+00 8.20E+00 WF L3923-05 39 AcTh-228 -1.40E+00 6.10E+00 2.20E+01 WF L3923-05 39 Ag- 108m 7.OOE-01 1.20E+0O 4. IOE+00 WF L3923-05 39 Ag-I lOm 2.30E+00 2.10E+00 7.30E+00 WF U3923-05 39 Ba-140 -3.30E+00 2.80E+00 1.20E+01 WF L3923-05 39 Be-7 -I1.50E+01 1.40E+OI 5.OOE+01 WF L3923-05 39 Ce-141 -7.OOE-O01 3.30E+0O 1.IOE+01 WF L3923-05 39 Ce-144 3.OOE+00 1.20E+0I 4.10E+01 WF L3923-05 39 Co-57 6.OOE-01 1.50E+00 5.IOE+00 WF. L3923-05 39 Co-58 3.10OE+00 1.60E+00 5.30E+OO WF L3923-05 39 Co-60 -4.OOE-01 2.OOE+00 7.20E+O0 WF U3923-05 39 Cr-51 -6.OOE+00 1.70E+O1 6.OOE+01 WF L3923-05 39 Cs-134 -LI OOE-01 1.60E+00 5.70E+O0 WF L3923-05 39 Cs-137 I1.90E+00 l.50E+O0 5. 1OE-i00 WF L3923-05 39 Fe-59 4.60E+O0 5.70E+00 2.OOE+01 WF L3923-05 39 1-131 2.40E-01 2.80E-0O 9.80E-01 WF L3923-05 39 K-40 I1.49E+03 6.20E+0O 5.70E+01 WF L3923-05 39 La-140 -3.80E-.00 3.20E+00 I1.30E+01 WF L3923-05 39 Mn-54 3.OOE-01 1.50E+0O 5.40E+00 WF L3923-05 39 Nb-95 -1.40E+00 2.OOE+0O 7.20E+00 WF L3923-05 39 Ru-103 O.OOE+00 1.80E+0O 6.40E+00 WF L3923-05 39 Ru-106 3.OOE+00 1.30E+01 4.70E+01 WF L3923-05 39 Sb-124 -7.70E+00 3.10E+0O 1.40E-,01 WF L3923-05 39 Sb-125 -2.40E+00 3.90E+00 1.40E+01 WF L3923-05 39 Se-75 -2.30E-i00 2.20E+OO 7.90E+00 WF L3923-05 39 Zn-65 1.30E+00 6.80E+OO 2.30E+01 WF L3923-05 39 Zr-95 -1 .60E+00 2.60E+0O 9.80E+O0 GTF L4043-01 41 AcTh-228 7.80E+00 4.30E+0O I1.40E+01 GTF L4043-01 41 Ag-108m -4.OOE-01 1.1OE+O0 3.80E+00 GTF L4043-01 41 Ag-l lOm 2.OOE-01 I .60E+0O 5.80E+00 GTF L4043-01 41 Ba-140 -8.001E-01 1.50E+0O 5.80E+00 GTF L4043-01 41 Be-7 2.OOE+O0 I.OOE+0O 3.60E+01 GTF L4043-01 41 Ce-141 4.001E-01 2.OOE+0O 6.90E+00 GTF L4043-01 41 Ce-144 -5.OOE+00 I .30E+0O 4.30E+01 GTF L4043-01 41 Co-57 7.OOE-01 1.10E+0O 3.50E+00 GTF L4043-01 41 Co-58 -2.60E+00 I .lOE+0O 4.50E+00 GTF L4043-01 41 Co-60 .1.30E+00 I .50E+00 5.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-129

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

GTF L4043-01 41 Cr-51 3.OOE+00 1.20E+01 4.OOE+0O GTF L4043-01 41 Cs-134 6.OOE-01 1.30E+00 4.40E+00 GTF L4043-01 41 Cs-137 -1.50E+00 1.20E+00 4.50E+00 GTF L4043-01 41 Fe-59 6.70E+00 2.70E+00 8.30E+O0 GTF L4043-01 41 1-131 -4.00E-02 2.40E-01 9.80E-01 GTF L4043-01 41 K-40 1.48E+03 5.10E+01 4.90E+01 GTF L4043-01 41 La-140 -9.OOE-01 1.70E+00 6.70E+00 GTF L4043-01 41 Mn-54 -2.00E-01 1.20E+00 4.50E+00 GTF L4043-01 41 Nb-95 I.OOE-0O 1.40E+00 4.80E+00 GTF L4043-01 41 Ru-103 7.OOE-01 1.20E+00 4.10E+00 GTF L4043-01 41 Ru-106 -2.OOE+00 I.IOE+01 3.80E+01 GTF L4043-01 41 Sb-124 -9.OOE-01 2.50E+00 9.60E+00 GTF L4043-01 41 Sb-125 O.OOE+00 3.1OE+00 1.10E+01 GTF L4043-01 41 Se-75 7.00E-01 1.60E+00 5.50E+00 GTF L4043-01 41 Zn-65 5.10E+00 5.90E+00 2.00E+01 GTF L4043-01 41 Zr-95 2.90E+00 2.10E+00 7.10E+00 MR L4043-02 41 AcTh-228 8.80E+00 5.90E+00 2.00E+01 MR L4043-02 41 Ag-108m -1.00E-0O l.1OE+00 3.90E+00 MR L4043-02 41 Ag-lOrm -5.OOE-01 2.30E+00 8.OOE+00 MR L4043-02 41 Ba-140 -3.002-01 2.20E+00 8.30E+00 MR L4043-02 41 Be-7 1.80E+01 1.I0E+01 3.80E+01 MR L4043-02 41 Ce-141 -1.IO0+00 2.80E+00 9.60E+00 MR L4043-02 41 Ce-144 1.102+01 l.lOE+0O 3.50E+OI MR L4043-02 41 Co-57 8.OOE-01 1.40E+00 4.70E+00 MR L4043-02 41 Co-58 -1.00-01 130E+00 4.80E+00 MR L4043-02 41 Co-60 O.OOE+00 1.80E+00 6.50E+00 MR L4043-02 41 Cr-51 -4.00E+00 1.40E+01 4.90E+01 MR L4043-02 41 Cs-134 O.OOE+00. 1.50E+00 5.50E+00 MR LA043-02 41 Cs-137 -1.50E+00 1.50E+00 5.50E+00 MR L4043-02 41 Fe-59 -4.40E+00 3.50E+00 1.30E+O1 MR

L4043-02 41 1-131 2.70E-01 2.80E-01 9.90E-O1 MR L4043-02 41 K-40 1.87E+03 6.40E+01 6.70E+01 MR L4043-02 41 La-140 -3.OOE-01 2.50E+00 9.50E+00 MR L4043-02 41 Mn-54 -3.30E+00 1.50E+00 5.70E+00 MR L4043-02 41 Nb-95 2.002+00 1.60E+00 5.50E+00 MR L4043-02 41 Ru-103 -7.00E-01 1.50E+00 5.30E+00 MR L4043-02 41 Ru-106 5.00E+00 I.IOE+01 3.702+01 MR L4043-02 41 Sb-124 -2.40E+00 2.90E+00 1.20E+01 MR L4043-02 41 Sb-125 1.IOE+00 3.40E+00 1.20E+01 MR L4043-02 41 Se-75 1.30E+00 1.90E+00 6.402+00

Radioactivity detected In sample (i.e., concentration > 3 X standard deviation)

D-130

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR L4043-02 41 Zn-65 -8.40E+00 3.80E+O0 1.50E+01 MR L4043-02 41 Zr-95 O.OOE+00 2.40E+00 8.60E+00 SF L4043-03 41 AcTh-228 -2.60E+00 6.OOE+00 2.20E+01 SF L4043-03 41 Ag-108m -5.OOE-01 1.20E+00 4.20E+O0 SF L4043-03 41 Ag-I lOm 5.OOE-01 2.20E+00 8.OOE+00 SF L4043-03 41 Ba-140 -5.OOE-01 2.OOE+00 8.10E+OO SF L4043-03 41 Be-7 3.OOE+00 l.OOE+0O 3.70E+O1 SF LA043-03 41 Ce-141 4.20E+00 2.20E+00 7.20E+O0 SF L4043-03 41 Ce-144 9.OOE-01 7.80E+00 2.70E+0O SF L4043-03 41 Co-57 7.OOE-01 1.lOE+O0 3.60E+OO SF L4043-03 41 Co-58 1.20E+O0 1.40E+00 4.70E3+00 SF L4043-03 41 Co-60 -1.90E+00 2.20E+00 8.30E+O0 SF L4043-03 41 Cr-51 5.OOE+O0 1.30E+01 4.40E+O1 SF L4043-03 41 Cs-134 7.OOE-0O 1.40E+00 5.OOE+O0 SF L4043-03 41 Cs-137 -7.OOE-0O 1.50E+O0 5.70E+O0 SF L4043-03 41 Fe-59 -2.80E+O0 3.60E+00 1.40E+01 SF L4043-03 41 1-13I 1.50E-0O 2.40E-01 9.10E-01 SF L4043-03 41 K-40 1.32E+03 6.30E+OI 7.OOE+0I SF L4043-03 41 La- 140 -5.OOE-01 2.30E+00 9.40E+00 SF L4043-03 41 Mn-54 O.OOE+00 1.50E+00 5.40E+O0 SF L4043-03 41 Nb-95 -1.90E+OO 1.70E+O0 6.70E+00 SF L4043-03 41 Ru-103 -1.IOE+O0 1.40E+00 5.40E+00 SF L4043-03 41 Ru-106 6.OOE+00 1.50E+OI 5.10E+01 SF L4043-03 41 Sb-124 -1.50E+00 3.10E+O0 1.30E+01 SF L4043-03 41 Sb-125 -4.80E+O0 3.50E+OO 1.30E+01 SF L4043-03 41 Se-75 6.OOE-01 1.80E+00 6.40E+O0 SF L4043-03 41 Zn-65 2.40E+0O 3.90E+O0 1.30E+01 SF L4043-03 41 Zr-95 2.20E+00 2.50E+00 8.60E+00 LF L4043-04 41 AcTh-228 -5.OOE-OI 4. 1OE+00 1.50E+I01 LF L4043-04 41 Ag-108m -2.20E-0I 8.90E-OI 3.20E+00 LF L4043-04 41 Ag-lOrm -2.00E-O1 1.40E+00 5. 1OE+00 LF L4043-04 41 Ba-140 0.OOE+O0 1.60E+O0 5.90E+00 LF L4043-04 41 Be-7 6.80E+00 8.50E+00 2.90E+0O LF L4043-04 41 Ce-141 -3.70E+00 1.80E+00 6.60E+O0 LF L4043-04 41 Ce-144 -1.60E+O0 7.OOE+00 2.40E+0O LF L4043-04 41 Co-57 5.60E-01 9.00E-01 3.10E+00 LF L4043-04 41 Co-58 -1.60E+O0 l.OOE+00 3.90E+OO LF L4043-04 41 Co-60 2.60E+00 1.40E+00 4.70E+OO LF L4043-04 41 Cr-51 -7.50E+O0 9.90E+00 3.50E+01 LF L4043-04 41 Cs-134 -2.00E+00 l.OOE+00 4.IOE+OO

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-131

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LF L4043-04 41 Cs-137 9.00E-01 1.20E+00 3.90E+00 LF L4043-04 41 Fe-59 5.00E-01 2.50E+00 8.70E+00 LF L4043-04 41 1-131 -4.OOE-02 2.40E-01 9.90E-0O LF L4043-04 41 K-40 1.43E+03 4.70E+01 4.90E+01 LF L4043-04 41 La-140 0.OOE+00 1.80E+00 6.80E+00 LF L4043-04 41 Mn-54 -3.20E-01 9.80E-01 3.60E+O0 LF L4043-04 41 Nb-95 -7.00E-01 1.IO0+00 4.10E+00 LF L4043-04 41 Ru-103 -I.IOE+00 1.IOE+00 4.00E+00 LF L4043-04 41 Ru-106 -1.82E+01 9.90E+00 3.70E+01 LF L4043-04 41 Sb-124 O.OOE+00 2.60E+00 9.50E+00 LF L4043-04 41 Sb-125 -9.OOE-01 2.80E+00 9.802+00 LF L4043-04 41 Se-75 -2.30E+00 1.40E+00 5.1OE+00 LF L4043-04 41 Zn-65 3.602+00 3.60E+00 1.202+01 LF L4043-04 41 Zr-95 1.60E+00 1.70E+00 5.802+00 WF L4043-05 41 Aclb-228 -1.40E+00 4.00E+00 1.50E+01 WF L4043-05 41 Ag-108m -7.40E-01 8.60E-01 3.20E+00 WF L4043-05 41 Ag-l lOnm 1.IOE+00 1.60E+00 5.50E+00 WF L[4043-05 41 Ba-140 -1.30E+00 1.60E+00 6.402+00 WF L4043-05 41 Be-7 O.OOE+00 8.402+00 3.002+01 WF L4043-05 41 Ce-141 1.20E+00 2.10E+00 7.102+00 WF L4043-05 41 Ce-144 3.00E+00 7.30E+00 2.50E+01 WF L4043-05 41 Co-57 -6.00E-02 9.802-01 3.40E+00 WF L4043-05 41 Co-58 0.00+00 1.102+00 3.90E+00 WF L4043-05 41 Co-60 1.20E+00 1.502+00 5.302+00 WF L4043-05 41 Cr-51 -I.OOE+01 1.102+01 4.002+01 WF L4043-05 41 Cs-134 -8.00E-01 1.202+00 4.602+00 WF L4043-05 41 Cs-137 3.002+00 1.20E+00 3.802+00 WF L4043-05 41 Fe-59 -2.60E+00 2.80E+00 1.10E+01 WF L4043-05 41 1-131 2.60E-01 2.70E-01 9.902-01 WF [4043-05 41 K-40 1.33E+03 5.102+01 5.20E+01 WF L4043-05 41 La-140 -1.50E+00 1.80E+00 7.402+00 WF L4043-05 41 Mn-54 -1.80E+00 1.IO0+00 4.202+00 WF L4043-05 41 Nb-95 -8.00E-01 1.20E+00 4.502+00 WF L4043-05 41 Ru-103 1.80E+00 1.30E+00 4.30E+00 WF L4043-05 41 Ru-106 -5.00E+00 1.00E+01 3.702+01 WF L4043-05 41 Sb-124 I.OOE+00 2.102+00 7.70E+00 WF L4043-05 41 Sb-125 -3.00E-01 3.002+00 1.102+01 WF L4043-05 41 Se-75 4.00E-01 1.402+00 4.90E+00 WF L4043-05 41 Zn-65 -3.20E+00 3.20E+00 1.20E+01 WF L4043-05 41 Zr-95 3.30E+00 2.202+00. 7.20E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-132

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

GTF L4185-01 43 AcTh-228 5.OOE-0O 5.30E+00 1.80E+01 GTF L4185-01 43 Ag-108m 3.1OE-01 8.80E-01 3.OOE+00 GTF L4185-01 43 Ag-IlOm 2.40E+00 1.501E+00 5.OOE+00 GTF L4185-01 43 Ba-140 2.OOE+00 2.00E+00 6.70E+00 GTF L4185-01 43 Be-7 -1.05E+01 8.70E+00 3.10E+0O GTF L4185-01 43 Ce-141 -3.40E+00 2.40E+00 8. 1OE+00 GTF L4185-01 43 Ce-144 -8.60E+00 5.30E+00 1.80E+0O GTF L4185-01 43 Co-57 -4.90E-0O 6.60E-01 2.30E+0O GTF L4185-01 43 Co-58 l.OOE-01 1. lOE+00 3.80E+00 GTF L4185-01 43 Co-60 2.30E+00 1.60E+00 S.20E+00 GTF L4185-01 43 Cr-51 8.00E-01 9.60E+O0 3.30E+01 GTF L4185-01 43 Cs-134 -7.00E-0O 1.30E3+00 4.50E+00 GTF L4185-01 43 Cs-137 l.OOE+00 1.20E+00 4.00E+00 GTF L4185-01 43 Fe-59 8.00E-01 2.90E+00 9.90E+00 GTF L4185-01 43 1-131 6.40E-0O 3.20E-0O 9.OOE-01 GTF L4185-01 43 K-40 1.41E+03 4.40E+0O 6.50E+01 GTF L4185-01 43 La-140 2.30E+00 2.30E+00 7.70E+00 GTF L4185-01 43 Mn-54 3.00E-01 1.lIOE+00 3.70E+O0 GTF L4185-01 43 Nb-95 -9.OOE-01 1.20E+00 4. 10E+00 GTF L4185-01 43 Ru-103 -1.70E+00 1.lOE+00 3.80E+00 GTF L4185-01 43 Ru-106 2.70E+00 9.90E+00 3.40E+01 GTF L4185-01 43 Sb-124 O.OOE+00 2.90E+00 1.OOE+01 GTF L4185-01 43 Sb-125 5.20E+00 2.70E+00 8.80E+00 GTF LU185-01 43 Se-75 2.20E+00 1.20E+00 4.OOE+00 GTF L4185-01 43 Zn-65 1.50E+00 2.70E+00 9.40E+00 GTF L4185-01 43 Zr-95 -2.50E+00 1.90E+00 6.90E+00 MR L4185-02 43 AcTh-228 1.501E+00 5.OOE+00 1.70E+0O MR L4185-02 43 Ag-108m 2.00E-0O l.OOE+00 3.50E+00 MR L4185-02 43 Ag-I lOm -1.70E+00 1.80E+00 6.30E+00 MR L4185-02 43 Ba-i40 1.60E+00 1.70E+00 5.90E+00 MR L4185-02 43 Be-7 -1.06E+01 9.30E+00 3.30E+01 MR L4185-02 43 Ce-141 -2.10E+00 1.70E+00 5.80E+00 MR L4185-02 43 Ce-144 8.50E+OO 6.60E+00 2.20E+01 MR L4185-02 43 Co-57 -1.20E-01 8.10E-OI 2.80E+00 MR UA185-02 43 Co-58 1.IOE+00 1.20E+00 3.90E+00 MR L4185-02 43 Co-60 -5.OOE-01 1.70E+00 5.90E+00 MR L4185-02 43 Cr-51 1.OOE+00 1.OOE+0O 3.50E+01 MR L4185-02 43 Cs-134 -3.00E-0O l.10E+00 4.OOE+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-133

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR L4185-02 43 Cs-137 -2.30E+00 1.20E+00 4.40E+O0 MR L4185-02 43 Fe-59 4.OOE-01 2.90E+00 9.90E+O0 MR L4185-02 43 1-131 7.OOE-02 2.10E-01 9.30E-OI MR L4185-02 43 K-40 1.94E+03 5.OOE+01 5.40E+OI MR L4185-02 43 La-140 I.90E+00 2.OOE+00 6.80E+O0 MR L4185-02 43 Mn-54 l.OOE-OI 1.20E+00 4.20E+OO MR L4185-02 43 Nb-95 -1.80E+00 1.40E+00 5.10E+0O MR L4185-02 43 Ru-103 -1.40E+0O l.lOE+OO 4.OOE+OO MR L4185-02 43 Ru-106 -2.00E+OO I.OOE+OI 3.60E+O1 MR L4185-02 43 Sb-124 -1.60E+00 2.60E+00 9.70E+O0 MR L4185-02 43 Sb-125 -4.80E+00 3.OOE+OO 1.1OE+0O MR L4185-02 43 Se-75 2.30E+00 1.50E+00 4.90E+OO MR L4185-02 43 Zn-65 3.80E+00 3.90E+00 1.30E+O1 MR L4185-02 43 Zr-95 -I.OOE+OO 2.10E+00 7.40E+OO SF L4185-03 43 AcTh-228 1.05E+01 5.10E+00 1.70E+O1 SF L4185-03 43 Ag-108m 4.50E-01 9.70E-01 3.30E+O0 SF L4185-03 43 Ag-llim -I.OOE+OO 1.90E+00 6.70E+OO SF L4185-03 43 Ba-140 -1.90E1+00 2.70E+OO 1.OOE+OI SF L4185-03 43 Be-7 l.OOE+OI I.OOE+OI 3.40E+OI SF L4185-03 43 Ce-141 1.20E+00 1.70E+00 5.80E+OO SF L4185-03 43 Ce-144 -1.30E+00 6.OOE+00 2.OOE+O1 SF L4185-03 43 Co-57 -7.90E-01 7.40E-01 2.60E+0O SF L4185-03 43 Co-58 1.40E+00 1.30E+00 4.50E+OO SF L4185-03 43 Co-60 7.OOE-01 1.80E+00 6.1OE+OO SF L4185-03 43 Cr-51 3.20E+01 1.20E+01 3.90E+OI SF L4185-03 43 Cs-134 -3.60E+00 1.50E+00 5.50E+O0 SF L4185-03 43 Cs-137 I.OOE-0 1.30E+00 4.60E+OO SF L4185-03 43 Fe-59 -2.60E+00 3.30E+00 1.20E+OI SF L4185-03 43 1-131 -2.1OE-01 1.20E-01 9.30E-OI SF L4185-03 43 K-40 1.35E+03 4.80E1+01 6.80E+OI1 SF L4185-03 43 La-140 -2.20E+00 3.10E+00 1.20E+O1 SF L4185-03 43 Mn-54 O.OOE+0O 1.40E+00 4.80E+OO SF L4185-03 43 Nb-95 -4.00E-01 1.50E+00 5.30E+0O SF L4185-03 43 Ru-103 -4.00E-01 1.20E+00 4.40E+OO SF L4185-03 43 Ru-106 I.OOE+O0 1.20E+01 4.10E+OI SF L4185-03 43 Sb-124 1.20E+00 3.50E+00 1.20E+O1 SF L4185-03 43 Sb-125 1.50E+00 2.90E+00 9.80E+O0 SF L4185-03 43 Se-75 I.OOE+00 1.50E+00 4.90E+00 SF L4185-03 43 Zn-65 I.OOE+00 4.30E+00 1.50E+0O SF L4185-03 43 Zr-95 -2.60E+00 2.30E+00 8.30E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-134

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LF L4185-04 43 AcTh-228 -3.20E+00 3.60E+00 1.30E+OI LF L4185-04 43 Ag-108m 3.OOE-02 6.70E-0O 2.30E+0O LF L4185-04 43 Ag-l lOm 4.OOE-0O l .1OE+O0 3.60E+OO LF L4185-04 43 Ba-140 -1.OOE+00 1.40E+00 5.30E+00 LF L4185-04 43 Be-7 4.70E+00 7.20E+00 2.40E+0O LF L4185-04 43 Ce-141 -3.10E+00 2.OOE+00 7.OOE+00 LF L4185-04 43 Ce-144 -1.20E+00 4.30E+00 1.50E+0I LF L4185-04 43 Co-57 4.20E-0O 5.70E-0O 1.90E+00 LF L4185-04 43 Co-58 -1.36E+00 8.80E-0O 3.20E+00 LF L4185-04 43 Co-60 -4.OOE-0O l.OOE+00 3.50E+00 LF L4185-04 43 Cr-51 5.10E+00 8.30E+00 2.80E+0O LF L4185-04 43 Cs-134 5.1OE-0I 8.20E-OI 2.80E+00 LF L4185-04 43 Cs-137 8.20E-01 8.90E-0O 3.OOE+00 LF L4185-04 43 Fe-59 -1.40E+00 2.OOE+OO 7.20E+00 LF L4185-04 43 1-131 3.60E-01 2.80E-0O 9.50E-0I LF LA185-04 43 K-40 1.51E+03 3.50E+01 4.OOE+0I LF L4185-04 43 La-140 -1.80E+00 1.60E+00 6.10E+O0 LF L4185-04 43 Mn-54 1.61E+00 7.80E-O1 2.50E+O0 LF L4185-04 43 Nb-95 -1.09E+00 9.70E-OI 3.50E+00 LF L4185-04 43 Ru-103 -2.80E-0O 8.60E-OI 3.00E+00 LF L4185-04 43 Ru-106 -6.80E+00 8.OOE+00 2.80E+OI LF L4185-04 43 Sb-124 -6.OOE-0O 1.80E+00 6.70E+O0 LF L4185-04 43 Sb-125 -3.70E+O0 2. 1OE+00 7.40E+00 LF L4185-04 43 Se-75 -7. IOE-0O 8.80E-OI 3.10E+00 LF L4185-04 43 Zn-65 2.90E+O0 2.80E+O0 9.OOE+00 LF L4185-04 43 Zr-95 -1.70E+00 1.50E+00 5.50E+00 WF LA185-05 43 AcTh-228 1.40E+00 4.80E+O0 1.60E+0O WF LA185-05 43 Ag-108m -7.10E-0O 7.90E-0O 2.80E+0O WF LA185-05 43 Ag-I lOm -8.OOE-0O 1.50E+O0 5.30E+00 WF L4185-05 43 Ba-140 -3.90E+00 2.20E+00 8.70E+00 WF L4185-05 43 Be-7 1.28E+0O 8.70E+00 2.90E+0O WF LA185-05 43 Ce-141 O.OOE+OO 1.40E+00 4.70E+00 WF L4185-05 43 Ce-144 4.20E+00 4.90E+0O 1.60E+0O WF LA185-05 43 Co-57 8.OOE-02 6.40E-OI 2.20E+00 WF L1A85-05 43 Co-58 -3.OOE-0O . IOE+0O 3.80E+00 WF LA185-05 43 Co-60 l .OE+0O 1.40E+0O 4.90E+00 WF LA185-05 43 Cr-51 -1.50E+0O l.OOE+0O 3.60E+0O WF LA185-05 43 Cs-134 9.OOE-OI 1.20E+00 4.OOE+OO WF LA185-05 43 Cs-137 l .OE+00 1.1 OE+0O 3.80E+O0 WF LA185-05 43 Fe-59 2.60E+00 2.90E+OO 9.70E+O0

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-135

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WF L4185-05 43 1-131 3.20E-01 2.60E-01 8.80E-0l WF L4185-05 43 K-40 1.34E+03 4.20E+01 5.70E+01 WF L4185-05 43 La-140 -4.50E+00 2.60E+00 1.00E+01 WF L4185-05 43 Mn-54 I.OOE+OO I.IOE+00 3.60E+00 WF L4185-05 43 Nb-95 -1.90E+00 1.50E+00 5.40E+00 WF L4185-05 43 Ru-103 -1.20E+00 1.IOE+00 3.80E+00 WF L4185-05 43 Ru-106 -7.20E+00 9.90E+00 3.50E+01 WF L4185-05 43 Sb-124 -1.60E+00 2.50E+00 9.40E+00 WF L4185-05 43 Sb-125 O.OOE+00 2.60E+00 8.80E+00 WF L4185-05 43 Se-75 -5.00E-01 1.20E+00 4.10E+00 WF L4185-05 43 Zn-65 -3.OOE+00 2.70E+00 9.80E+00 WF L4185-05 43 Zr-95 -9.OOE-01 2.00E+00 7.OOE+00 GTF L4254-01 45 AcTh-228 5.OOE-01 5.40E+00 1.90E+01 GTF L4254-01 45 Ag-108m -5.60E-01 9.90E-01 3.70E+00 GTF L4254-01 45 Ag-ll0m -5.00E-01 1.60E+00 6.00E+00 GTF L4254-01 45 Ba-140 I.OOE-01 1.60E+00 6.20E+00 GTF L4254-01 45 Be-7 9.OOE+00 1.OOE+01 3.50E+01 GTF L4254-01 45 Ce-141 3.60E+00 2.10E+00 6.80E+00 GTF L4254-01 45 Ce-144 -4.00E-01 8.00E+00 2.80E+01 GTF L4254-01 45 Co-57 9.00E-01 1.10E+00 3.60E+00 GTF LA254-01 45 Co-58 -6.00E-01 1.20E+00 4.70E+00 GTF LA254-01 45 Co-60 -1.60E+00 1.70E+00 6.60E+00 GTF L4254-01 45 Cr-51 1.OOE+00 1.20E+01 4.20E+01 GTF L4254-01 45 Cs-134 -1.60E+00 1.20E+00 4.80E+00 GTF L4254-01 45 Cs-137 7.00E-01 1.20E+00 4.30E+00 GTF L4254-01 45 Fe-59 -4.00E-01 2.90E+00 I.IOE+01 GTF L4254-01 45 1-131 2.20E-01 2.40E-01 9.30E-01 GTF U254-01 45 K-40 1.48E+03 5.90E+01 5.90E+01 GTF UA254-01 45 La-140 1.OOE-01 1.80E+00 7.10E+00 GTF U4254-01 45 Mn-54 -4.00E-02 9.70E-01 3.60E+00 GTF L4254-01 45 Nb-95 3.00E-01 1.20E+00 4.40E+00 GTF U4254-01 45 Ru-103 -1.20E+00 1.30E+00 4.80E+00 GTF L4254-01 45 Ru-106 -6.00E+00 1.10E+01 3.90E+01 GTF L4254-01 45 Sb-124 O.OOE+00 2.30E+00 9.20E+00 GTF 14254-01 45 Sb-125 -1.40E+00 3.20E+00 1.20E+01 GTF 14254-01 45 Se-75 6.00E-01 1.40E+00 4.90E+00 GTF UA254-01 45 Zn-65 -2.40E+00 3.20E+00 1.20E+01 GTF 1254-01 45 Zr-95 1.90E+00 2.50E+00 8.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-136

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR L4254-02 45 AcTh-228 1.50E+O0 8.30E+00 3.OOE+01 MR L4254-02 45 Ag-108m -1.20E+O0 1.SOE+O0 5.SOE+00 MR L4254-02 45 Ag- lOim 1.50E+00 2.40E+00 8.70E+O0 MR L4254-02 45 Ba-140 3. 1OE+00 2.OOE+00 6.60E+00 MR L4254-02 45 Be-7 3.1OE+0I 1.50E+01 4.70E+01 MR L4254-02 45 Ce-141 -5.30E+00 2.40E+00 9.10E+00 MR L4254-02 45 Ce-144 3.20E+O0 9.90E+00 3.40E+0O MR L4254-02 45 Co-57 1.80E+O0 1.20E+00 4.OOE+00 MR L4254-02 45 Co-58 4.OOE-Ol 1.60E+00 6.OOE+00 MR L4254-02 45 Co-60 1.lOE+00 2.90E+O0 I.OOE+01 MR L4254-02 45 Cr-51 -1.30E+0O 1.60E+01 6.OOE+01 MR L4254-02 45 Cs-134 8.OOE-0I 1.80E+00 6.SOE+00 MR L4254-02 45 Cs-137 -1.70E+00 2.10E+00 7.80E+00 MR L4254-02 45 Fe-59 3.80E+00 5.OOE+00 1.70E+01 MR L4254-02 45 1-131 2.OOE-02 1.60E-01 9.20E-01 MR L4254-02 45 K-40 1.95E+03 8.90E+01 8.30E+01 MR L4254-02 45 La-140 3.SOE+00 2.30E+00 7.60E+00 MR L4254-02 45 Mn-54 -1.30E+00 1.70E+00 6.70E+00 MR L4254-02 45 Nb-95 7.OOE-0I 2.OOE+00 7.10E+00 MR L4254-02 45 Ru-103 4.30E+00 1.60E+00 4.70E+00 MR L4254-02 45 Ru-106 6.OOE+00 1.70E+01 5.90E+0O MR L4254-02 45 Sb-124 O.OOE+O0 3.80E+O0 l.SOE+01 MR L4254-02 45 Sb-125 -1.SOE+00 4.10E+00 l .50E+0I MR L4254-02 45 Se-75 1. lOE+00 2.20E+00 7.60E+O0 MR L4254-02 45 Zn-65 -6.SOE+00 4.70E+00 1.90E+0I MR L4254-02 45 Zr-95 -1. IOE+00 3.10E+00 1.20E+0I SF L4254-03 45 AcTh-228 3.SOE+00 4.80E+00 1.70E+O1 SF L4254-03 45 Ag-108m 1.30E+00 1.lOE+00 3.60E+00 SF L4254-03 45 Ag- lOim 3.OOE-0I 2.OOE+00 7.20E+O0 SF L4254-03 45 Ba-140 -2.30E+00 1.90E+00 7.80E+O0 SF L4254-03 45 Be-7 -5.OOE+00 1.lOE+O1 3.90E+O1 SF L4254-03 45 Ce-141 -2.40E+O0 2.20E+00 8.OOE+O0 SF L4254-03 45 Ce-144 1.14E+01 8.90E+00 3.OOE+0O SF L4254-03 45 Co-57 2.30E+O0 1.lOE+O0 3.70E+O0 SF L4254-03 45 Co-58 3.OOE-01 1.30E+00 4.70E+00 SF L4254-03 45 Co-60 3.50E+O0 2.10E+00 6.70E+00 SF L4254-03 45 Cr-SI O.OOE+O0 1.30E+01 4.50E+0I SF L4254-03 45 Cs-134 6.OOE-0I 1.30E+00 4.70E+OO SF L4254-03 45 Cs-137 O.OOE+00 1.30E+00 4.90E+OO SF L4254-03 45 Fe-59 -4.OOE-01 3.40E+00 1.20E+O1

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-137

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SF L4254-03 45 1-131 9.OOE-02 1.70E-01 7.60E-OI SF L4254-03 45 K-40 1.47E+03 6.10E+01 6.10E+O1 SF L4254-03 45 La-140 -2.60E+00 2.l10E+00 9.OOE+OO SF L4254-03 45 Mn-54 -7.OOE-01 1.40E+00 5. IOE+00 SF L4254-03 45 Nb-95 9.OOE-01 1.20E+00 4.30E+O0 SF L4254-03 45 Ru-103 -1.20E+00 1.30E+00 4.80E+OO SF L4254-03 45 Ru-106 5.OOE+00 1.30E+01 4.50E+OI SF L4254-03 45 Sb-124 1.20E+00 2.60E+00 9.90E+OO SF L4254-03 45 Sb-125 I.90E+00 3.30E+O0 1.IOE+0I SF L4254-03 45 Se-75 3.50E+00 1.80E+00 5.80E+00 SF L4254-03 45 Zn-65 4.OOE-01 3.20E+00 1.20E+OI SF L4254-03 45 Zr-95 -5.OOE-01 2.IOE+00 7.80E+OO LF L4254-04 45 AcTh-228 3.20E+00 5.OOE+00 1.70E+OI LF L4254-04 45 Ag-108m -2.OOE-01 9.60E-01 3.50E+OO LF L4254-04 45 Ag-i lOmn 8.OOE-01 1.60E+00 5.50E+O0 LF L4254-04 45 Ba-140 -2. 1OE+00 1.60E+00 6.70E+O0 LF L4254-04 45 Be-7 I.OOE+01 l.OOE+OI 3.40E+OI LF L4254-04 45 Ce-141 3.70E+00 2.50E+00 8.30E+OO LF L4254-04 45 Ce-144 -1.30E+00 8.OOE+00 2.80E+OI LF L4254-04 45 Co-57 1.40E+0O I.1OE+OO 3.50E+OO LF L4254-04 45 Co-58 7.OOE-01 1.20E+00 4.20E+OO LF L4254-04 45 Co-60 -1.30E+00 1.50E+00 5.70E+O0 LF L4254-04 45 Cr-51 I.OOE+01 I.IOE+01 3.70E+0O LF L4254-04 45 Cs-134 -1.60E+00 1.30E+00 5.OOE+00 LF L4254-04 45 Cs-137 6.OOE-01 1.20E+00 4.20E+OO LF L4254-04 45 Fe-59 -3.20E+00 2.90E+O-O 1.IOE+OI LF L4254-04 45 1-131 8.OOE-01 3.80E-01 9.OOE-01 LF L4254-04 45 K-40 1.51E+03 5.60E+01 5.80E+01 LF L4254-04 45 La-140 -2.50E+00 1.80E+00 7.70E+OO LF L4254-04 45 Mn-54 -I.OOE-0I l.IOE+00 4.OOE+OO LF L4254-04 45 Nb-95 - 1.40E+00 1.20E+00 4.70E+OO LF L4254-04 45 Ru-103 -1.60E+00 1.30E+00 5.OOE+OO LF L4254-04 45 Ru-106 -9.OOE+00 1.20E+01 4.50E+0O LF L4254-04 45 Sb-124 -L.OOE-01 2.50E+00 9.70E+OO LF L4254-04 45 Sb-125 -2.1OE+00 2.90E+OO 1.IOE+0I LF L4254-04 45 Se-75 I.OOE-OI 1.70E+00 5.70E+00 LF L4254-04 45 Zn-65 -2.40E+00 3.60E+00 1.30E+0O LF L4254-04 45 Zr-95 -4.OOE-01 2.OOE+00 7.30E+OO WF L4254-05 45 AcTh-228 I.IOE+OO 4.60E+00 1.70E+01 WF L4254-05 45 Ag-108m -2.OOE-01 I.IOE+0O 3.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-138

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WF L4254-05 45 Ag-l lOm I .OOE-0O 1.30E+00 5.OOE+00 WF L4254-05 45 Ba-140 -1.70E+00 1.30E+00 6.OOE+O0 WF L4254-05 45 Be-7 -1.04E+01 9.1OE+00 3.50E+0O WF LU254-05 45 Ce-141 O.OOE+00 2.OOE+00 7.10E+00 WF L4254-05 45 Ce-144 9.OOE-01 8.10E+00 2.80E+0O WF L4254-05 45 Co-57 1.50E+00 l.IOE+00 3.60E+00 WF LU254-05 45 Co-58 -1.40E+O0 1.20E+00 4.90E+00 WF L4254-05 45 Co-60 1.80E+00 1.30E+00 4.30E+00 WF L4254-05 45 Cr-51 -7.OOE+00 l.lOE+01 4.OOE+0O WF L4254-05 45 Cs-134 3.OOE-0O 1.30E+00 4.70E+00 WF L4254-05 45 Cs-137 2.OOE+O0 1.30E+00 4.20E+O0 WF L4254-05 45 Fe-59 -1.50E+00 3.30E+00 1.20E+OI WF L4254-05 45 1-131 2.30E-0O 2.50E-01 9.60E-01 WF L4254-05 45 K-40 1.53E+03 6.OOE+01 5.90E+0I WF L4254-05 45 La-140 -2.OOE+00 1.50E+00 6.90E+O0 WF L4254-05 45 Mn-54 9.OOE-01 1.20E+00 4.20E+O0 WF L4254-05 45 Nb-95 6.OOE-01 1.20E+00 4.40E+O0 WF L4254-05 45 Ru-103 -3.OOE-0l 1.30E+00 4.70E+O0 WF L4254-05 45 Ru-106 -9.OOE+00 1.20E+01 4.40E+OI WF L4254-05 45 Sb-124 -4.10E+00 2.50E+O0 1.1OE+OI WF L4254-05 45 Sb-125 -3.OOE-0O 3.30E+00 1.20E+OI WF L4254-05 45 Se-75 4.OOE-01 1.40E+00 4.80E+00 WF L4254-05 45 Zn-65 -8.OOE-0O 3.40E+00 1.20E+0O WF L4254-05 45 Zr-95 -5.OOE-0O l.90E+00 7.10E+00 GTF L4372-01 47 AcTh-228 4.90E+00 5.OOE+00 1.70E+I0 GTF L4372-01 47 Ag-108m 7.30E-0I 9.20E-01 3.1OE+O0 GTF L4372-01 47 Ag- lOim 7.OOE-01 l.90E+00 6.70E+O0 GTF L4372-01 47 Ba-140 2.30E+00 2.60E+00 8.90E+O0 GTF L4372-01 47 Be-7 l .05E+0O 9.70E+00 3.20E+0O GTF L4372-01 47 Ce-141 l.OOE-0I 1.70E+00 5.70E+O0 GTF L4372-01 47 Ce-144 4.50E+00 6.OOE+00 2.OOE+0I GTF L4372-01 47 Co-57 -I.50E-0O 7.10E-01 2.40E+OO GTF L4372-01 47 Co-58 -1.70E+00 1.20E+00 4.30E+00 GTF L4372-01 47 Co-60 1.20E+O0 1.70E+00 5.70E+O0 GTF L4372-01 47 Cr-51 -6.OOE+O0 l.lOE+0O 3.80E+01 GTF L4372-01 47 Cs-134 1.30E+O0 1.20E+00 4. IOE+O0 GTF L4372-01 47 Cs-137 1.20E+O0 1.30E+00 4.20E+OO GTF L4372-01 47 Fe-59 4.50E+00 3.20E+00 I.IOE+OI

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-139

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

GTF L4372-01 47 1-131 4.00E-02 1.40E-01 7.50E-0O GTF L4372-01 47 K-40 1.44E+03 4.80E+01 6.30E+01 GTF L4372-01 47 La-140 2.70E+00 3.00E+00 I.OOE+01 GTF L4372-01 47 Mn-54 I.OOE+00 1.40E+00 4.60E+00 GTF L4372-01 47 Nb-95 1.30E+00 1.40E+00 4.60E+00 GTF L4372-01 47 Ru-103 -2.50E+00 1.30E+00 4.60E+00 GTF L4372-01 47 Ru-106 -2.40E+01 1.102+01 4.10E+OI GTF L4372-01 47 Sb-124 4.40E+00 3.10E+00 1.00E+01 GTF L4372-01 47 Sb- 125 -2.40E+00 2.80E+00 1.00E+01 GTF L4372-01 47 Se-75 -7.OOE-01 1.40E+00 4.70E+00 GTF L4372-01 47 Zn-65 -2.20E+00 3.30E+00 1.20E+01 GTF L4372-01 47 Zr-95 -5.OOE-01 2.20E+00 7.60E+00 MR L4372-02 47 AcTh-228 1.60E+00 7.20E+00 2.50E+01 MR L4372-02 47 Ag-108m -1.04E+00 8.90E-01 3.20E+00 MR L4372-02 47 Ag-l lOm -3.00E+00 1.80E+00 6.50E+00 MR L4372-02 47 Ba-140 3.10E+00 2.10E+00 7.10E+00 MR L4372-02 47 Be-7 -4.20E+00 9.40E+00 3.30E+0I MR L4372-02 47 Ce-141 -2.30E+00 2.70E+00 9.30E+00 MR L4372-02 47 Ce-144 3.80E+00 5.80E+00 1.90E+01 MR LA372-02 47 Co-57 8.70E-01 7.50E-01 2.50E+00 MR L4372-02 47 Co-58 3.00E-01 1.20E+00 4.30E+00 MR L4372-02 47 Co-60 -1.80E+00 1.70E+00 6.30E+00 MR L4372-02 47 Cr-SI 1.00E+01 1.10E+01 3.80E+01 MR L4372-02 47 Cs-134 1.50E+00 1.30E+00 4.40E+00 MR L4372-02 47 Cs-137 2.40E+00 1.40E+00 4.50E+00 MR L4372-02 47 Fe-59 O.OOE+00 3.302+00 1.20E+01 MR L4372-02 47 1-131 -3.00E-02 1.30E-01 8.40E-01 MR L4372-02 47 K-40 1.81E+03 5.302+01 6.40E+01 MR L4372-02 47 La-140 3.60E+00 2.50E+00 8.10E+00 MR L4372-02 47 Mn-54 2.70E+00 1.40E+00 4.40E+OO MR L4372-02 47 Nb-95 -3.00E-01 1.50E+00 5.102E+O MR L4372-02 47 Ru-103 -3.00E-01 1.30E+00 4.50E+00 MR L4372-02 47 Ru-106 5.00E+00 1.1OE+01 3.702+01 MR L4372-02 47 Sb-124 2.00E+00 3.10E+00 1.10E+01 MR L4372-02 47 Sb-125 0.OOE+00 3.002+00 I.OOE+01 MR L4372-02 47 Se-75 -1.60E+00 1.60E+00 5.40E+00 MR L4372-02 47 Zn-65 -7.90E+00 3.302+00 1.20E+01 MR L4372-02 47 zr-95 2.60E+00 2.30E+00 7.50E+00 SF L4372-03 47 AcTh-228 -9.OOE-01 7.20E+00 2.502+01 SF L4372-03 47 Ag-108m 1.60E+00 1.40E+00 4.602+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-140

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SF L4372-03 47 Ag-ll0m -5.OOE-01 2.70E+00 9.60E+00 SF L4372-03 47 Ba-140 5.20E+00 2.90E+00 9.20E+00 SF L4372-03 47 Be-7 3.10E+01 1.60E+01 5.10E+0O SF L4372-03 47 Ce-141 -4.OOE-01 3.20E+00 1.lOE+0O SF L4372-03 47 Ce-144 -1.OOE+00 I.IOE+0I 3.70E+0O SF L4372-03 47 Co-57 8.OOE-01 1.40E+00 4.60E+00 SF L4372-03 47 Co-58 2.80E+00 1.70E+00 5.60E+00 SF LA372-03 47 Co-60 -1.60E+00 2.10E+00 7.70E+00 SF L4372-03 47 Cr-51 7.OOE+00 1.80E+01 6.OOE+0O SF L4372-03 47 Cs-134 7.OOE-01 1.70E+00 6.1OE+OO SF L4372-03 47 Cs-137 5.OOE-O1 1.90E+00 6.40E+OO SF L4372-03 47 Fe-59 -1.09E+01 4.30E+00 1.70E+O1 SF L4372-03 47 1-131 2.20E-01 2.10E-01 7.90E-01 SF L4372-03 47 K-40 1.55E+03 6.60E+01 9.40E+01 SF L4372-03 47 La-140 6.OOE+00 3.30E+OO I.lOE+OI SF [4372-03 47 Mn-54 2.50E+00 1.70E+00 5.50E+OO SF [4372-03 47 Nb-95 3.70E+OO l.90E+00 6.20E+OO SF [A372-03 47 Ru-103 1.30E+.00 2.1OE+00 7.30E+OO SF L4372-03 47 Ru-106 -I.OOE+01 1.60E+01 5.60E+0O SF L4372-03 47 Sb-124 -2.10E+00 4.50E+00 1.70E+01 SF L4372-03 47 Sb-125 -3.80E+00 4.OOE+00 1.40E+O1 SF L4372-03 47 Se-75 -1.50E+00 2.30E+00 7.90E+00 SF [4372-03 47 Zn-65 1.65E+01 7.OOE+00 2.30E+0O SF L4372-03 47 Zr-95 -6.OOE-01 3.OOE+00 l.lOE+0O LF L4372-04 47 AcTh-228 1.28E+01 5.30E+00 1.70E+0O LF [4372-04 47 Ag-108m -1.90E+00 I.IOE+00 4.1OE+00 LF L4372-04 47 Ag-I Orm 9.OOE-01 1.80E+00 6.30E+00 LF L4372-04 47 Ba-140 -3.60E+00 2.30E+00 9.30E+00 LF L4372-04 47 Be-7 -1.30E+OI I.IOE+0 4.10E+0 LF L4372-04 47 Ce-141 1.40E+00 2.OOE+00 6.90E+00 LF L4372-04 47 Ce-144 -7.40E+00 7.OOE+00 2.SOE+0I LF L4372-04 47 Co-57 L.IOE-01 9.30E-01 3.20E+00 LF [4372-04 47 Co-58 -1.60E+00 1.30E+00 4.70E+00 LF L4372-04 47 Co-60 3.70E+00 1.60E+00 4.90E+00 LF L4372-04 47 Cr-51 -2.40E+01 1.40E+01 4.90E+0I LF L4372-04 47 Cs-134 -4.OOE-01 1.40E+00 5.OOE+00 LF L4372-04 47 Cs-137 -I.OOE+00 1.40E+00 5.10E+00 LF L4372-04 47 Fe-59 -1.80E+00 3.1OE+00 I.IOE+0O LF L4372-04 47 1-131 -1.09E-01 1.80E-02 8.20E-0O LF L4372-04 47 K-40 1.45E+03 5.30E+01 6.90E+0I

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-141

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LF L4372-04 47 La-140 -4.20E+00 2.70E+00 .I1OE+01 LF L4372-04 47 Mn-54 -5.00E-01 1.30E+00 4.80E+00 LF L4372-04 47 Nb-95 -1.30E+00 1.70E+00 6.10E+00 LF L4372-04 47 Ru-103 -2.70E+00 1.50E+00 5.40E+00 LF L4372-04 47 Ru-106 9.00E+00 1.20E+01 4.30E+01 LF L4372-04 47 Sb-124 1.80E+00 3.00E+00 I.1OE+01 LF L4372-04 47 Sb-125 -4.10E+00 3.40E1+00 1.20E+01 LF L4372-04 47 Se-75 -I.10E+00 1.60E1+00 5.60E+00 LF L4372-04 47 Zn-65 -2.60E+00 3.50E+00 1.30E+01 LF L4372-04 47 Zr-95 -4.70E+00 2.40E+00 9.10E+OO WF L4372-05 47 AcTh-228 2.10E+00 5.202+00 1.80E+01 WF L4372-05 47 Ag-108m 1.50E+00 I.OOE+00 3.40E+00 WF L4372-05 47 Ag-l lOm 3.00E+00 1.90E+00 6.20E+00 WF LA372-05 47 Ba-140 O.OOE+0O 2.20E+00 8.10E+00 WF L4372-05 47 Be-7 1.20E+0I I.IOE+0I 3.80E+01 WF L4372-05 47 Ce-141 1.70E+00 2.40E+00 8.00E+O00 WF L4372-05 47 Ce-144 -I.OOE+00 7.50E+00 2.60E+01 WF L4372-05 47 Co-57 -2.68E+00 9.402-01 3.40E+00 WF L4372-05 47 Co-58 -6.00E-01 1.50E+00 5.20E+00 WF L4372-05 47 Co-60 2.20E+00 1.802+00 6.10E+00 WF L4372-05 47 Cr-51 9.00E+00 1.30E+01 4.30E+01 WF L4372-05 47 Cs-134 -2.50E+00 1.602+00 5.80E+00 WF L4372-05 47 Cs-137 1.80E+00 1.60E+00 5.202+00 WF L4372-05 47 Fe-59 3.80E+00 3.502+00 1.20E+01 WF L4372-05 47 1-131 1.00-01 1.80E-01 8.20E-01 WF L4372-05 47 K-40 1.42E+03 5.20E+01 7.10E+01 WF L4372-05 47 La-140 0.00+00 2.50E+00 9.30E+00 WF L4372-05 47 Mn-54 -2.00E+00 1.40E+00 5.30E+00 WF L4372-05 47 Nb-95 -4.20E+00 1.60E+00 6.30E+OO WF L4372-05 47 Ru-103 -1.102+00 1.40E+00 4.90E+00 WF L4372-05 47 Ru-106 -1.OOE+OI 1.30E+01 4.60E+01 WF L4372-05 47 Sb-124 -3.90E+00 3.30E+00 1.30E+01 WF L4372-05 47 Sb-125 1.40E+00 3.20E+00 1.10+01 WF L4372-05 47 Se-75 -3.00E-01 1.702+00 5.802+00 WF L4372-05 47 Zn-65 -3.90E+00 3.80E+00 1.40E+01 WF L4372-05 47 Zr-95 -2.90E+00 2.40E+00 8.902+00 GTF L4468-01 49 AcTh-228 6.00E-01 8.30E+00 2.90E+01 GTF L4468-01 49 Ag-108m 1.OOE+00 1.40E+00 4.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-142

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

GTF L4468-01 49 Ag-l lOrn -3.40E+00 2.60E+00 9.80E+00 GTF L4468-01 49 Ba-140 -2.60E+00 2.70E+00 1.IOE+0O GTF L4468-01 49 Be-7 -I.IOE+0O 1.70E+01 5.90E+0O GTF IA468-01 49 Ce-141 -5.50E+00 3.OOE+00 L.OOE+0O GTF L4468-01 49 Ce-144 2.40E+0O 1.1OE+0 3.60E+01 GTF L4468-01 49 Co-57 -9.OOE-0O 1.40E+00 4.90E+00 GTF LA468-01 49 Co-58 1.20E+00 1.80E+00 6.40E+00 GTF LA468-01 49 Co-60 -2.10E+00 2.10E+00 8.OOE+00 GTF L4468-01 49 Cr-51 l.OOE+00 1.80E+01 6.10E+01 GTF LA468-01 49 Cs-134 -2.OOE-0O 2.1OE+00 7.50E+00 GTF L4468-01 49 Cs-137 -5.OOE-0O l.90E+00 6.80E+00 GTF L4468-01 49 Fe-59 7.OOE-0O 4.20E+00 1.50E+0O GTF LU468-01 49 1-131 3.OOE-0I 2.70E-01 9.50E-0O GTF LA468-01 49 K40 1.42E+03 7.OOE+0 I.OOE+02 GTF L4468-01 49 La-140 -3.OOE+00 3.1OE+00 1.20E+01 GTF LU468-01 49 Mn-54 8.OOE-0O 1.90E+00 6.50E+00 GTF U4468-01 49 Nb-95 -3.90E+00 2.30E+00 8.60E+00 GTF L4468-01 49 Ru-103 O.OOE+00 1.90E+00 6.60E+00 GTF UA468-01 49 Ru-106 2.30E+0O 1.70E+01 5.50E+01 GTF L4468-01 49 Sb-124 -4.70E+00 5. IOE+00 2.OOE+01 GTF U4468-01 49 Sb-125 3.40E+00 4.60E+00 1.60E+01 GTF LA468-01 49 Se-75 l .OOE-0O 2.30E+00 7.90E+00 GTF U4468-01 49 Zn-65 -8.90E+00 4.60E+00 1.80E+O1 GTF U4468-01 49 Zr-95 -2.70E+00 3.40E+00 1.20E+0O MR U4468-02 49 AcTh-228 -3.60E+00 5.70E+00 2.10E+0O MR 1U468-02 49 Ag-108m 1.70E+00 1.20E+00 3.80E+00 MR L4468-02 49 Ag-lOrm -1.70E+00 l.90E+00 7.20E+00 MR L4468-02 49 Ba-140 -6.OOE-01 2.OOE+00 7.50E+00 MR LU468-02 49 Be-7 7.OOE+00 1.lOE+0 3.80E+01 MR 14468-02 49 Ce-141 6.OOE-0I 2.10E+00 7.20E+00 MR 14468-02 49 Ce-144 6.30E+00 7.90E+00 2.60E+0O MR L4468-02 49 Co-57 -I.OOE-01 l.OOE+00 3.60E+00 MR 1A468-02 49 Co-58 -2.OOE-0O 1.30E+00 4.90E+00 MR LA468-02 49 Co-60 2.60E+00 2.OOE+00 6.60E+00 MR U4468-02 49 Cr-51 1.IOE+OI 1.30E+01 4.40E+0O MR 14468-02 49 Cs-134 1.50E+00 1.50E+00 5.1OE+O0 MR 14468-02 49 Cs-137 1.90E+00 1.70E+00 5.60E+00 MR U4468-02 49 Fe-59 -6.80E+00 3.50E+00 1.40E+0O MR L4468-02 49 1-131 4.80E-01 2.80E-01 7.50E-01 MR U4468-02 49 K-40 2.01E+03 6.40E+01 7.10E+0I

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-143

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR L4468-02. 49 La-140 -7.00E-01 2.30E+00 8.70E+00 MR L4468-02 49 Mn-54 -1.50E+00 I .SOE+00 5.40E+00 MR L4468-02 49 Nb-95 -2.80E+00 1.60E+00 6.10E+00 MR L4468-02 49 Ru-103 -1.50E+00 1.40E+00 5.IOE+00 MR L4468-02 49 Ru-106 -4.OOE+00 1.30E+01 4.60E+01 MR L4468-02 49 Sb-124 4.50E+00 3.10E+00 L.OOE+0O MR L4468-02 49 Sb-125 -2.40E+00 3.40E+00 1.20E+01 MR L4468-02 49 Se-75 8.OOE-01 1.80E+00 6.20E+00 MR L4468-02 49 Zn-65 -6.20E+00 3.50E+00 1.30E+0O MR L4468-02 49 Zr-95 7.OOE-01 2.50E+00 8.60E+00 SF L4468-03 49 AcTh-228 -2.OOE+00 5.50E+00 2.00E+01 SF L4468-03 49 Ag-108m 9.00E-01 I.IOE+00 3.90E+00 SF L4468-03 49 Ag-l lOm -6.20E+00 1.80E+00 7.50E+00 SF L4468-03 49 Ba-140 2.60E+00 1.90E+00 6.20E+00 SF L4468-03 49 Be-7 -1.30E1+01 1.20E+01 4.40E+0I SF L4468-03 49 Ce-141 3.80E+00 2.20E+00 7.20E+00 SF L4468-03 49 Ce-144 4.OOE+00 7.40E+00 2.50E+01 SP L4468-03 49 Co-57 -6.40E-01 9.10E-01 3.20E+0O SF L4468-03 49 Co-58 1.30E+00 1.40E+00 4.90E+00 SF L4468-03 49 Co-60 -2.00E-OI I.90E+00 6.60E+O0 SF L4468-03 49 Cr-51 -3.00E+00 1.40E+01 4.80E+01 SF LA468-03 49 Cs-134 -2.10E+00 1.40E+00 5.60E+00 SF L4468-03 49 Cs-137 I.90E+00 1.50E+00 5.00E+00 SF L4468-03 49 Fe-59 -6.OOE+00 3.10E+00 1.20E+I01 SF L4468-03 49 1-131 2.30E-01 2.30E-01 8.30E-0O SF L4468-03 49 K-40 1.22E+03 5.60E+01 8.OOE+0I SF L4468-03 49 La-140 3.00E+00 2.20E+00 7.20E+00 SF L4468-03 49 Mn-54 3.00E-01 1.30E+00 4.50E+00 SF L4468-03 49 Nb-95 -3.30E+00 1.60E+00 6.30E+00 SF L4468-03 49 Ru-103 3.OOE-01 1.40E+00 5.OOE+00 SF L4468-03 49 Ru-106 2.OOE+00 1.30E+01 4.70E+0I SF L4468-03 49 Sb-124 6.00E-01 2.90E+00 1.1OE+01 SF L4468-03 49 Sb-125 -2.20E+00 3.50E+00 1.30E+01 SF L4468-03 49 Se-75 -1.60E+00 1.50E+00 5.60E+00 SF L4468-03 49 Zn-65 -4.90E+00 3.60E+00 1.40E+01 SF L4468-03 49 Zr-95 -9.OOE-01 2.90E3+00 I.OOE+01 LF L4468-04 49 AcTh-228 -4.70E+00 5.30E+00 I.90E+0I LF L4468-04 49 Ag-108m -I.OOE-01 l.IOE+00 3.80E+00 LF L4468-04 49 Ag-I lOm -2.OOE-01 1.80E+00 6.20E+00 LF L4468-04 49 Ba-140 3.80E+00 2.40Ei+00 7.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-144

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LF L4468-04 49 Be-7 -8.OOE+00 I.IOE+01 3.80E+01 LF L4468-04 49 Ce-141 2.70E+00 2.50E+00 8.40E+00 LF L4468-04 49 Ce-144 -1 .08E+OI 7.40E+00 2.60E+0O LF L4468-04 49 Co-57 8.20E-01 9.30E-01 3.10E+00 LF L4468-04 49 Co-58 l1.OOE-OI 1.30E+00 4.70E+00 LF L4468-04 49 Co-60 -3.OOE-OI 1.80E+00 6.30E+00 LF L4468-04 49 Cr-51 1.40E+OI 1.30E+01 4.30E+0I LF L4468-04 49 Cs-134 -I .OOE-01 1.30E+00 4.60E+00 LF L4468-04 49 Cs-137 1.90E+OO 1.40E+00 4.60E+00 LF L4468-04 49 Fe-59 1.70E+00 3.50E+00 1.20E+0I LF L4468-04 49 1-131 2.OOE-OI 2.OOE-01 7.60E-OI LF L4468-04 49 K-40 1.41E+03 5.OOE+0 7.10E+0I LF L4468-04 49 La-140 4.40E+00 2.70E+00 8.90E+00 LF L4468-04 49 Mn-54 7.OOE-0O 1.30E+00 4.40E+00 LF L4468-04 49 Nb-95 -3.90E+00 1.70E+00 6.20E+00 LF L4468-04 49 Ru-103 -2.10E+00 1.40E+00 5.IOE+00 LF L4468-04 49 Ru-106 9.OOE+00 1.20E+01 4.10E+0O LF L4468-04 49 Sb-124 4.20E+00 2.90E+00 9.50E+O0 LF L4468-04 49 Sb-125 -8.OOE-0O 3.1OE+00 I.lOE+0O LF L4468-04 49 Se-75 -2.00E+00 1.60E+00 5.60E+00 LF L4468-04 49 Zn-65 2.90E+00 4.70E+00 1.60E+OI LF L4468-04 49 Zr-95 3.60E+00 2.IOE+00 7.00E+00 WF L4468-05 49 AcTh-228 9.40E+00 4.OOE+00 1.30E+0I WF L4468-05 49 Ag-108m 3.40E-OI 7.70E-01 2.60E+00 WF 1A468-05 49 Ag-i lOm -2.OOE-OI 1.40E+00 4.90E+00 WF L4468-05 49 Ba-140 3.00E-OI 1.60E+00 5.60E+00 WF L4468-05 49 Be-7 2.40E+00 7.OOE+00 2.40E+OI WF L4468-05 49 Cc-141 2.OOE-OI 1.20E+00 4.20E+00 WF L4468-05 49 Cc-144 6.40E+00 4.60E+00 I.50E+01 WF L4468-05 49 Co-57 -1.30E-0O 5.80E-01 2.OOE+00 WF L4468-05 49 Co-58 2.OOE-02 9.70E-01 3.40E+00 WF L4468-05 49 Co-60 2.20E+00 1.30E+00 4.30E+00 WF L4468-05 49 Cr-SI 5.50E+00 8.10E+00 2.70E+0I WF L4468-05 49 Cs-134 1.30E+00 l.OOE+00 3.50E+00 WF L4468-05 49 Cs-137 -I.OOE+OO l.lOE+00 3.80E+00 WF L4468-05 49 Fe-59 3.90E+00 2.40E+00 8.OOE+00 WF L4468-05 49 1-131 5.40E-0I 3.20E-01 8.20E-OI WF L4468-05 49 K-40 1.34E+03 3.90E+01 5.80E+0I WF L4468-05 49 La-140 4.00E-01 1.80E+00 6.40E+00 WF L4468-05 49 Mn-54 6.OOE-0O 1.lOE+00 3.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-145

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std; Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WF L4468-05 49 Nb-95 -4.60E-01 9.70E-01 3.40E+00 WF L4468-05 49 Ru-103 -7.90E-01 9.60E-01 3.30E+00 WF L4468-05 49 Ru-106 -4.20E+00 8.60E+00 3.00E+0O WF L4468-05 49 Sb-124 3.OOE-01 2.40E1+00 8.70E+00 WF L4468-05 49 Sb-125 -2.OOE-01 2.30E+00 7.90E+O0 WF L4468-05 49 Se-75 -9.OOE-OI I.IOE+0O 3.60E+00 WF L4468-05 49 Zn-65 2.20E+00 3.20E+00 I.OOE+0O WF L4468-05 49 Zr-95 5.00E-01 1.70E+00 5.80E+0O GTF L4546-01 51 AcTh-228 -1.03E+01 7.1OE+00 2.70E+01 GTF L4546-01 51 Ag-108m -1.90E+00 1.50E+00 5.40E+00 GTF L4546-01 51 Ag-l lOm -8.OOE-01 2.30E+00 8.50E+00 GTF L4546-01 51 Ba-140 2.OOE+00 2.70E+00 9.50E+00 GTF L4546-01 51 Be-7 8.00E+00 1.30E+01 4.50E+0O GTF L4546-01 51 Ce-141 -2.30E+00 2.40E+00 8.20E+00 GTF L4546-01 51 Ce-144 -5.OOE-01 7.50E+00 2.60E+OI GTF LA546-01 51 Co-57 1.52E+00 9.90E-01 3.30E+00 GTF L4546-01 51 Co-58 -1.20E+00 1.70E+00 6.20E+OO GTF L4546-01 51 Co-60 6.00E-01 2.40E+00 8.30E+OO GTF L4546-01 51 Cr-51 -1.20E+01 1.40E+01 5.OOE+OI GTF L4546-01 51 Cs-134 I.OOE-OI 1.7E+00 6.20E+0O GTF L4546-01 51 Cs-137 O.OOE+OO 1.90E+00 6.70E+OO GTF L4546-01 51 Fe-59 3.30E+00 3.90E+00 1.40E+01 GTF L4546-01 51 1-131 1.04E-01 7.40E-02 2.40E-01 GTF L4546-01 51 K-40 1.40E+03 6.70E+01 8.60E+0I GTF LA546-01 51 La-140 2.20E+00 3.10E+OO I.IOE+01 GTF L4546-01 51 Mn-54 -1.80E+00 1.90E+00 7. 1OE+00 GTF L4546-01 51 Nb-95 -3.OOE+00 1.90E+00 7.40E+00 GTF L4546-01 51 Ru-103 -2.80E+00 1.70E+00 6.40E+00 GTF L4546-01 51 Ru-106 3.OOE+00 1.60E+01 5.60E+01 GTF L4546-01 51 Sb-124 -8.60E+00 4.70E+00 2.OOE+01 GTF L4546-01 51 Sb-125 2.OOE+00 4.1OE+00 1.40E+01 GTF L4546-01 51 Se-75 -7.OOE-01 1.80E+00 6.30E+00 GTF L4546-01 51 Zn-65 -3.30E+00 4.50E+00 1.70E+O1 GTF L4546-01 51' Zr-95 -I.OOE-01 3.IOE+0O I.IOE+01 MR L4546-02 51 AcTh-228 -7.OOE+00 8. 10E+00 2.90E+01 MR L4546-02 51 Ag-108m O.OOE+O0 1.30E+00 4.60E+O0 MR L4546-02 51 Ag- lOim 1.60E+00 2.60E+00 9.10E+00 MR L4546-02 51 Ba-140 1.50E+00 2.90E+00 I.OOE+0I

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-146

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

MR L4546-02 51 Be-7 I.OOE+00 1.30E+01 4.60E+01 MR L4546-02 51 Ce-141 5.30E+00 2.402+00 7.60E+00 MR LA546-02 51 Ce-144 3.00E-01 7.70E+00 2.60E+01 MR L4546-02 51 Co-57 3.OOE-01 1.1OE+00 3.602+00 MR L4546-02 51 Co-58 1.50E+00 1.90E+00 6.50E+O0 MR L4546-02 51 Co-60 -1.90E+00 2.50E+00 9.10E+00 MR L4546-02 51 Cr-51 2.10E+01 1.50E+01 4.90E+01 MR L4546-02 51 Cs-134 4.90E+00 1.90E+00 6.00E+00 MR L4546-02 51 Cs-137 1.80E+00 1.90E+00 6.50E+00 MR L4546-02 51 Fe-59 -9.OOE-01 4.20E+00 1.50E+01 MR L4546-02 51 1-131 1.30E-01 1.20E-01 4.20E-01 MR L4546-02 51 K-40 2.03E+03 7.90E+01 8.50E+0 1 MR L4546-02 51 La-140 1.70E+00 3.30E+00 1.20E+01 MR L4546-02 51 Mn-54 -1.30E+00 1.80E+00 6.80E+00 MR L4546-02 51 Nb-95 -1.20E+00 1.80E+00 6.60E+00 MR L4546-02 51 Ru-103 3.OOE-01 1.80E+00 6.20E+00 MR L4546-02 51 Ru-106 1.70E+01 1.60E+01 5.40E+0l MR L4546-02 51 Sb-124 -7.80E+00 4.10E+00 1.80E+01 MR L4546-02 51 Sb-125 O.OOE+00 4.40E+00 1.50E+01 MR L4546-02 51 Se-75 O.OOE+OO 2.20E+00 7.50E+00 MR L4546-02 51 Zn-65 -I.OOE+00 4.70E+00 1.70E+01 MR L4546-02 51 Zr-95 -9.OOE-01 3.00E+00 1.10E+01 SF L4546-03 51 AcTh-228 l.OOE-01 6.50E+00 2.30E+01 SF L4546-03 51 Ag-108m -1.30E+00 l.OOE+O0 3.80E+00 SF L4546-03 51 Ag-lOrm 1.80E+00 2.OOE+00 6.80E+O0 SF L4546-03 51 Ba-140 -3.OOE-01 2.40E+00 8.90E+00 SF L4546-03 51 Be-7 6.OOE+00 1.30E+01 4.30E+01 SF L4546-03 51 Ce-141 l.OOE-01 1.90E+00 6.60E+00 SF 14546-03 51 Ce-144 6.80E+00 6.40E+00 2.10E+01 SF L4546-03 51 Co-57 -3.30E-01 8.30E-01 2.90E+00 SF L4546-03 51 Co-58 -2.50E+00 1.40E+00 5.20E+00 SF L4546-03 51 Co-60 2.20E+00 1.80E+00 6.OOE+00 SF L4546-03 51 Cr-51 2.80E+01 1.20E+01 3.90E+01 SF L4546-03 51 Cs-134 5.00E-01 1.60E+00 5.60E+00 SF L4546-03 51 Cs-137 7.00E-01 1.40E+00 4.70E+00 SF L4546-03 51 Fe-59 2.20E+00 3.30E+00 1.IOE+01 SF 14546-03 51 1-131 4.00E-01 2.50E-01 6.90E-01 SF 14546 51 K40 1.38E+03 5.40E+01 6.60E+01

SF L4546-03 51 La-140 -4.00E-01 2.80E+00 1.00E+01 SF L4546-03 51 Mn-54 -1.60E+00 1.402+00 5.20E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-147

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SF L4546-03 51 Nb-95 -3.60E+O0 1.501E+O0 5.80E+O0 SF L4546-03 51 Ru-103 -1.40E+O0 1.40E+O0 5.20E+00 SF L4546-03 51 Ru-106 4.OOE+O0 1.20E+01 4.20E+OI SF L4546-03 51 Sb-124 2.60E+O0 3.20E+00 l .OE+0O SF L4546-03 51 Sb-125 6. 10E+00 3.40E+O0 1.1OE+0O SF L4546-03 51 Se-75 1.70E+00 1.70E+O0 5.70E+00 SF L4546-03 51 Zn-65 -7.80E+O0 3.50E+00 1.40E+OI SF L4546-03 51 Zr-95 -7.OOE-01 2.40E3+00 8.80E+O0 LP L4546-04 51 Aclb-228 5.50E+O0 5.70E+O0 1.90E3+01 LF L4546-04 51 Ag-108m -6.00E-01 l.IOE+O0 3.90E3+00 LP L4546-04 51 Ag-I lOm -6.00E-01 1.80E+00 6.80E+O0 LF L4546-04 51 Ba-140 4.1OE+00 2. 10E+00 6.70E+O0 LP L4546-04 51 Be-7 -1.80E+O1 l.lOE+O1 4.30E+01 LP L4546-04 51 Ce-141 1.90E+O0 2.00E+O0 6.90E+O0 LF L4546-04 51 Ce-144 5.30E+O0 7.80E+00 2.60E1+O1 LF L4546-04 51 Co-57 l.IOE+00 l.OOE+00 3.40E+00 LF L4546-04 51 Co-58 -1.70E+O0 1.50E+O0 5.60E+00 LF L4546-04 51 Co-60 1.90E+O0 1.90E+O0 6.50E3+00 LF L4546-04 51 Cr-51 -1.20E+O1 1.30E+O1 4.60E+01 LF L4546-04 51 Cs-134 -4.OOE-01 1.501E+00 5.30E+00 LF L4546-04 51 Cs-137 -1.80E+O0 1.40E+O0 5.40E+00 LF L4546-04 51 Fe-59 -7. 10E+O0 3.OOE+00 1.20E+O1 LF L4546-04 51 1-131 -9. 1OE-02 1.90E-02 7.50E-O1 LF L4546-04 51 K-40 1.44E+03 5.90E+0O 7.40E+01 LF L4546-04 51 La-140 4.80E+00 2.40E+O0 7.70E+O0 LP L4546-04 51 Mn-54 -1.70E+3O0 1.40E+O0 5.20E+00 LF L4546-04 51 Nb-95 1.20E+3O0 1.60E+00 5.40E+OO LF L4546-04 51 Ru-103 -7.00E-01 1.501E+O0 5.30E+O0 LF L4546-04 51 Ru-106 -2.OOE+O0 1.30E+0O 4.70E+OI LF L4546-04 51 Sb-124 -2.90E+00 3.40E+OO 1.40E+O1 LF L4546-04 51 Sb-125 l.90E+O0 3.40E+O0 1.20E+01 LF L4546-04 51 Se-75 1.80E+00 1.40E+00 4.80E+00 LF L4546-04 51 Zn-65 6.30E+O0 6.80E+O0 2.30E+01 LF L4546-04 51 Zr-95 1.60E+O0 2.80E+O0 9.70E+O0 WF L4546-05 51 AcTh-228 1.48E+OI 7.00E+O0 2.30E+0O WF L4546-05 51 Ag-108m -8.00E-0O 1.30E+00 4.70E+O0 WF L4546-05 51 Ag-llOm 1.30E+O0 2.40E+00 8.40E3+00 WF L4546-05 51 Ba-140 5.60E1O0 2.60E+00 8.30E+O0 WF L4546-05 51 Be-7 -2.90E+O1 1.30E+0I 5.00E+01 WF L4546-05 51 Ce-141 2.80E+O0 2.70E+O0 9. IOE+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D- 148

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WF L4546-05 51 Ce-144 -1.97E+01 9.90E+00 3.50E+OI WF L4546-05 51 Co-57 -4.OOE-01 1.20E+00 4.20E+OO WF L4546-05 51 Co-58 -6.OOE-01 1.60E+00 5.90E+OO WF L4546-05 51 Co-60 1.30E+00 2.OOE+00 6.80E+OO WF L4546-05 51 Cr-51 2.OOE+00 1.50E+01 5.10E+OI WF L4546-05 51 Cs-134 -5.OOE-01 1.70E+00 6.20E+0O WF L4546-05 51 Cs-137 8.OOE-01 1.60E+00 5.70E+0O WF L4546-05 51 Fe-59 1.50E+00 3.40E+00 1.20E+01 WF L4546-05 51 1-131 -9.30E-02 1.90E-02 6.90E-OI WF L4546-05 51 K-40 1.30E+03 5.70E+01 8.1OE+01 WF L4546-05 51 La-140 6.40E+00 3.OOE+00 9.50E+0O WF L4546-05 51 Mn-54 -8.OOE-01 1.70E+00 6. 1OE+OO WF L4546-05 51 Nb-95 -2.1OE+00 1.90E+00 6.90E+OO WF LA546-05 51 Ru-103 -I.OOE-0O 1.90E+00 6.50E+OO WF L4546-05 51 Ru-106 1.70E+01 1.60E+01 5.40E+0O WF L4546-05 51 Sb-124 1.1OE+0O 4.10E+00 1.50E+OI WF L4546-05 51 Sb-125 -5.40E+00 3.80E+00 1.40E+OI WF L4546-05 51 Se-75 3.OOE-01 2.OOE+00 6.80E+OO WF L4546-05 51 Zn-65 -1.50E+01 4.10E+00 1.70E+0O WF L4546-05 51 Zr-95 I.OOE+0O 2.90E+00 I.OOE+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-149

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/lkg) (pCi/kg)

WD STJ L2062-01 02 AcTh-228 1.03E+01 3.90E+00 1.20E+01 STJ L2062-01 02 Ag-108m -6.50E-01 9.30E-01 3.30E+00 STJ L2062-01 02 Ag-1 10m 7.00E-01 1.60E+00 5.40E+00 STJ L2062-01 02 Ba-140 2.60E+00 2.30E+00 7.70E+00 STJ L2062-01 02 Be-7 O.OOE+00 9.20E+00 3.20E+0O STJ L2062-01 02 Ce-141 -1.80E+00 1.80E+00 6.40E+00 STJ L2062-01 02 Ce-144 5.40E+00 5.70E+00 I.90E+01 STJ L2062-01 02 Co-57 3.60E-01 7.40E-01 2.50E+O0 STJ L2062-01 02 Co-58 -4.OOE-0 1.IOE+00 3.80E+00 STJ L2062-01 02 Co-60 -4.OOE-01 1.20E+00 4.30E+00 STJ L2062-01 02 Cr-51 1.20E+0O I.IOE+0O 3.70E+01 STJ L2062-01 02 Cs-134 -I.OOE-01 l.lOE+00 4.OOE+00 STJ L2062-01 02 Cs-137 -2.OOE+00 1.20E+00 4.30E+00 STJ L2062-01 02 Fe-59 3.60E+00 3.30E+00 1.IOE+0O STJ L2062-01 02 GROSS BETA 1.45E+00 6.30E-01 2.OOE+00 STJ L2062-01 02 1-131 7.40E-01 4.10E-01 1.20E+00 STJ L2062-01 02 K-40 -9.OOE+00 1.70E+01 6.20E+0O STJ L2062-01 02 La-140 3.00E+00 2.60E+00 8.80E+00 STJ L2062-01 02 Mn-54 -6.30E-01 9.50E-01 3.50E+00 STJ L2062-01 02 Nb-95 -2. 10E+00 2.OOE+00 7.40E+00 STJ L2062-01 02 Ru-103 -8.00E-0O I.IOE+00 3.80E+00 STJ L2062-01 02 Ru-106 -3.OOE+00 1.OOE+01 3.70E+0O STJ L2062-01 02 Sb-124 -1.60E+00 2.80E+00 I.1OE+01 STJ L2062-01 02 Sb-125 2.60E+00 2.80E+00 9.30E+00 STJ L2062-01 02 Se-75 -1.40E+00 1.IOE+00 4.10E+00 STJ L2062-01 02 Zn-65 5.60E+00 5.70E+00 l.90E+0O STJ L2062-01 02 Zr-95 -1.20E+00 1.90E+00 7.OOE+00 LTW L2062-02 02 AcTh-228 1.32E+01 5.50E+00 2.00E+0I LTW L2062-02 02 Ag-108m -7.00E-01 1.20E+00 4.20E+00 LTW L2062-02 02 Ag-1 10m -2. 10E+00 2.20E+00 8.00E+00 LTW L2062-02 02 Ba-140 I.IOE+00 4.60E+00 1.70E+0O LTW L2062-02 02 Be-7 1.30E1+01 1.60E+01 5.50E+0I LTW L2062-02 02 Ce-141 1.30E+00 3.40E+00 I.1OE+01 LTW L2062-02 02 Ce-144 4.OOE+00 I.OOE+0O 3.50E+0O LTW L2062-02 02 Co-57 1.30E+00 1.20E+00 4.101E+00 LTW L2062-02 02 Co-58 3.OOE+00 1.50E+00 4.90E+00 LTW L2062-02 02 Co-60 -1.70E+00 1.60E+00 6.30E+00 LTW L2062-02 02 Cr-51 2.40E+0O I.90E+01 6.40E+0I LTW L2062-02 02 Cs-134 3.OOE-01 1.60E+00 5.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-150

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L2062-02 02 Cs-137 1.IOE+00 1.60E+00 5.50E+00 LTW L2062-02 02 Fe-59 3.80E+00 5.40E+00 1.90E+01 LTW L2062-02 02 GROSS BETA 3.69E+00 6.60E-01 1.90E+00 LTW L2062-02 02 1-131 6.30E-01 4.00E-01 1.20E+O0 LTW L2062-02 02 K-40 -3.OOE+01 2.20E+01 8.20E+01 LTW L2062-02 02 La-140 1.30E+00 5.30E+00 1.90E+01 LTW- L2062-02 02 Mn-54 -3.40E+00 1.70E+00 6.60E+00 LTW L2062-02 02 Nb-95 -5.OOE+O0 2.10E+00 8.30E+00 LTW L2062-02 02 Ru-103 -1.40E+00 2.10E+00 7.30E+00 LTW L2062-02 02 Ru-106 -2.40E+01 1.40E+01 5.30E+01 LTW L2062-02 02 Sb-124 -3.40E+00 4.40E+00 1.70E+01 LTW L2062-02 02 Sb-125 7.OOE-01 4.OOE+00 1.40E+01 LTW L2062-02 02 Se-75 -6.OOE-01 2.OOE+00 7.OOE+00 LTW L2062-02 02 Zn-65 9.20E+00 6.40E+00 2.10E+01 LTW L2062-02 02 Zr-95 4.60E+00 3.00E+00 9.90E+00 STJ L2121-01 04 AcTh-228 -1.40E+00 2.90E+00 9.60E+00 STJ L2121-01 04 Ag-108m 1.20E-01 3.50E-01 1.20E+00 STJ L2121-01 04 Ag-110m -1.30E-01 5.90E-01 2.OOE+00 STJ L2121-01 04 Ba-140 9.OOE-01 3.20E+00 1.1OE+01 STJ L2121-01 04 Be-7 4.10E+00 4.80E+00 1.60E+01 STJ L2121-01 04 Ce-141 2.OOE+00 1.lOE+00 3.60E+00 STJ L2121-01 04 Ce-144 3.OOE-01 2.40E+00 7.90E+00 STJ L2121-01 04 Co-57 O.OOE+00 3.10E-01 1.OOE+00 STJ L2121-01 04 Co-58 8.OOE-02 4.90E-01 1.70E+00 STJ L2121-01 04 Co-60 4.OOE-01 4.50E-01 1.50E+00 STJ L2121-01 04 Cr-51 -5.20E+00 7.90E+00 2.70E+01 STJ L2121-01 04 Cs-134 8.80E-01 4.10E-01 1.40E+00 STJ L21 21-01 04 Cs-137 -1.04E+00 4.40E-01 1.50E+00 STJ L2121-01 04 Fe-59 O.OOE+00 1.90E+00 6.40E+00 STJ L2121-01 04 GROSS BETA 3.71E+00 6.10E-01 1.70E+00 STJ L2121-01 04 1-131 5.OOE-02 2.30E-01 8.30E-01 STJ L2121 01 04 K-40 -1.OOE-01 9.40E+00 3.10E+01 STJ L2121-01 04 La-140 1.lOE+00 3.60E+00 1.20E+01 STJ L2121-01 04 Mn-54 6.OOE-02 4.40E-01 1.50E+00 STJ L2121-01 04 Nb-95 3.40E-01 7.50E-01 2.50E+00 STJ L2121-01 04 Ru-103 -1.70E+00 6.90E-01 2.40E+00 STJ L2121-01 04 Ru-106 O.OOE+00 4.10E+00 1.40E+01 STJ L2121-01 04 Sb-124 -1.30E+00 1.40E+00 4.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-151

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L2121-01 04 Sb-125 5.00E-01 1.10O+00 3.60E+00 STJ L2121-01 04 Se-75 7.00E-02 6.00E-01 2.00E+00 STJ L2121-01 04 Zn-65 -I.IOE+00 1.20E+00 4.30E+00 STJ L2121-01 04 Zr-9S 3.00E-02 9.10E-01 3.10E+00 LTW L2121-02 04 AcTh-228 -6.00E-01 2.20E+00 7.50+00 LTW L2121-02 04 Ag-108m -2.90E-01 3.40E-01 1.20E+O0 LTW L2121-02 04 Ag-1 10m -1.50E-01 6.00E-01 2.00E+00 LTW L2121-02 04 Ba-140 5.00E+00 3.00E+00 I.OOE+OI LTW L2121-02 04 Be-7 4.90E+00 5.00E+00 1.60E+0O LTW L2121-02 04 Ce-141 4.00E-01 1.70E+00 5.70E+00 LTW L2121-02 04 Ce-144 -4.20E+00 2.50E+00 8.50E+O0 LTW L2121-02 04 Co-57 1.60E-01 3.30E-01 1.IOE+O0 LTW L2121-02 04 Co-58 -1.70E-01 5.60E-01 1.90E+00 LTW L2121-02 04 Co-60 -3.00E-01 4.20E-01 1.50E+00 LTW L2121-02 04 Cr-51 1.40E+00 7.80E+00 2.60E+O1 LTW L2121-02 04 Cs-134 5.00E-02 4.60E-01 1.50E+00 LTW L2121-02 04 Cs-137 -8.30E-01 4.40E-01 1.50E+00 LTW L2121-02 04 Fe-59 2.50E+00 1.702+00 5.50E+00 LTW L2121-02 04 GROSS BETA 4.93E+00 6.30E-01 1.70E+OO LTW L2121-02 04 1-131 7.00E-02 2.10E-01 7.80E-01 LTW L2121-02 04 K-40 1.96E+01 8.30E+00 2.70E+01 LTW L2121-02 04 La-140 5.80E+00 3.50E+O0 1.102+01 LTW L2121-02 04 Mn-54 6.50E-01 4.50E-01 1.50E+00 LTW L2121-02 04 Nb-95 2.00E-01 1.302+00 4.40E+00 LTW L2121-02 04 Ru-103 -1.97E+00 7.20E-01 2.50E+00 LTW L2121-02 04 Ru-106 3.20E+00 4.102+00 1.402+01 LTW L212i-02 04 Sb-124 -1.30E+00 1.502+00 5.10E+00 LTW L2121-02 04 Sb-125 1.10E+00 1.IOE+00 3.60E+00 LTW L2121-02 04 Se-75 -9.10E-01 6.20E-01 2.10E+00 LTW L2121-02 04 Zn-65 1.00-01 3.002+00 9.80E+00 LTW L2121-02 04 Zr-95 -3.90E-01 9.20E-01 3.10E+00 STJ L2179-01 06 AcTh-228 3.80E+00 3.30E+00 1.102+01 STJ L2179-01 06 Ag-108m -2.50E-01 4.802-01 1.602+00 STJ L2179-01 06 Ag-1 10m -6.70E-01 8.50E-01 3.00E+00 STJ L2179-01 06 Ba-140 3.00E+00 2.302+00 7.70E+00 STJ L2179-01 06 Be-7 9.00E-01 6.20E+00 2.10E+OI STJ L2179-01 06 Ce-141 -2.30E+00 1.302+00 4.50E+00 STJ L2179-01 06 Cc-144 1.012+01 3.80E+00 1.202+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-152

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L2179-01 06 Co-57 1.80E-01 4.80E-01 1.60E+00 STJ L2179-01 06 Co-58 -9.OOE-02 6.70E-01 2.30E+00 STJ L2179-01 06 Co-60 -2.10E-01 6.OOE-01 2.10E+00 STJ L2179-01 06 Cr-51 l.OOE-01 8.20E+00 2.70E+0I STJ L2179-01 06 Cs-134 8.OOE-02 6.10E-01 2. 10E+00 STJ L2179-01 06 Cs-137 4.50E-01 6.OOE-01 2.OOE+00 STJ L2179-01 06 Fe-59 1.30E+00 2.OOE+00 6.90E+00 STJ L2179-01 06 GROSS BETA 1.96E+00 6.60E-01 2.OOE+00 STJ L2179-01 06 1-131 l1.OE-01 1.30E-0I 4.50E-01 STJ L2179-01 06 K-40 -1.OOE+00 l .OE+01 3.80E+01 STJ L2179-01 06 La-140 3.40E+00 2.70E+00 8.90E+00 STJ L2179-01 06 Mn-54 4.70E-01 6.50E-01 2.20E+00 STJ L2179-01 06 Nb-95 4.50E-01 8.70E-01 2.90E+00 STJ L2179-01 06 Ru-103 -6.90E-01 8.20E-0I 2.80E+00 STJ L2179-01 06 Ru-106 7.70E+00 5.60E+00 l.90E+01 STJ L2179-01 06 Sb-124 -1.30E+00 1.70E+00 6.OOE+00 STJ L2179-01 06 Sb-125 1.20E+00 1.50E+00 4.90E+00 STJ L2179-01 06 Se-75 8.00E-02 8.20E-01 2.80E+00 STJ L2179-01 06 Zn-65 1.OOE-01 1.90E+00 6.40E+00 STJ L2179-01 06 Zr-95 3.OOE+00 1.20E+00 3.70E+00 LTW L2179-02 06 AcTh-228 9.OOE-01 3.40E+00 l.1OE+01 LTW L2179-02 06 Ag-108m -1.1OE-0 4.90E-01 1.70E+00 LTW L2179-02 06 Ag-I lOm -1.80E-01 8.80E-01 3.OOE+00 LTW L2179-02 06 Ba-140 8.OOE-01 2.40E+00 8.70E+00 LTW L2179-02 06 Be-7 -8.90E+00 5.60E+00 2.OOE+01 LTW L2179-02 06 Ce-141 -4.OOE-01 1.20E+00 3.90E+00 LTW L2179-02 06 Ce-144 -2.70E+00 3.1OE+00 1.OOE+01 LTW L2179-02 06 Co-57 5.30E-01 4.OOE-01 1.30E+00 LTW L2179-02 06 Co-58 6.30E-0O 7.10E-01 2.40E+00 LTW L2179-02 06 Co-60 -3.OOE-01 7.20E-01 2.50E+00 LTW L2179-02 06 Cr-51 -2.OOE-01 7.90E+00 2.70E+01 LTW L2179-02 06 Cs-134 9.60E-0I 6.30E-01 2.10E+00 LTW L2179-02 06 Cs-137 -1. 16E+00 6.40E-0I 2.30E+00 LTW L2179-02 06 Fe-59 I .OOE+00 2.30E+00 8.OOE+00 LTW L2179-02 06 GROSS BETA 2.58E+00 6.90E-01 2.10E+00 LTW L2179-02 06 1-131 1.30E-01 l. IOE-0I 3.70E-01 LTW L2179-02 06 K-40 -1.70E+0O 1.20E+01 4. 1OE+OI LTW L2179-02 06 La-140 -1.20E+00 2.80E+00 1.OOE+01 LTW L2179-02 06 Mn-54 7.20E-01 6.50E-01 2.20E+00 LTW L2179-02 06 Nb-95 -2.20E+00 1.40E+00 4.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-153

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L2179-02 06 Ru-103 -I.OOE+00 1.IOE+00 3.70E+00 LTW L2179-02 06 Ru-106 6.50E+00 6.00E+00 2.00E+0O LTW L2179-02 06 Sb-124 2.30E+00 2.OOE+00 6.70E+00 LTW L2179-02 06 Sb-125 2.80E+00 1.50E+00 5.OOE+00 LTW L2179-02 06 Se-75 1.18E+00 7.60E-01 2.50E+00 LTW L2179-02 06 Zn-65 6.OOE-01 1.80E+00 6.10E+00 LTW L2179-02 06 Zr-95 8.00E-01 1.20E+00 4.OOE+00 STJ L2261-01 08 AcTh-228 1.30E+00 3.OOE+00 I.OOE+0O STJ L2261-01 08 Ag-108m 6.80E-01 7.90E-01 2.70E+00 STJ L2261-01 08 Ag-I lOm -1.40E+00 1.30E+00 4.70E+00 STJ L2261-01 08 Ba-140 4.OOE+00 2.70E+00 8.90E+00 STJ L2261-01 08 Be-7 -5.40E+00 8.50E+00 3.00E+01 STJ L2261-01 08 Ce-141 -2.00E+00 3.00E3+00 I.OOE+O1 STJ L2261-01 08 Ce-144 -1.08E+01 5.60E+00 1.90E+0O STJ L2261-01 08 Co-57 5.30E-01 7.10E-01 2.40E+00 STJ L2261-01 08 Co-58 -4.OOE-01 I.OOE+00 3.70E+00 STJ L2261-01 08 Co-60 1.30E-01 9.30E-01 3.30E+00 STJ L2261-01 08 Cr-51 -2.40E+01 1.20E+01 4.30E+01 STJ L2261-01 08 Cs-134 7.00E-0I 1.lOE+00 3.60E+00 STJ L2261-01 08 Cs-137 -6.70E-01 9.80E-01 3.50E+00 STJ L2261-01 08 Fe-59 -6.00E-01 2.90E3+00 I.OOE+0O STJ L2261-01 08 GROSSBETA 1.62E1+00 9.90E-01 3.20E+00 STJ L2261-01 08 1-131 I.OOE-0O 2.20E-01 8.30E-0O STJ L2261-01 08 K-40 3.00E+00 1.60E+01 5.50E+0I STJ L2261-01 08 La-140 4.60E+00 3.1OE+00 1.OOE+01 STJ L2261-01 08 Mn-54 -8.00E-01 I.OOE+00 3.60E+00 STJ L2261-01 08 Nb-95 2.80E+00 1.30E1+00 4.40E+00 STJ L2261-01 08 Ru-103 -8.00E-01 1.20E1+00 4.20E3+00 STJ L2261-01 08 Ru-106 1.15E+01 9.1OE+00 3.OOE+0O STJ L2261-01 08 Sb-124 -5.20E+00 2.80E+00 I.IOE+01 STJ L2261-01 08 Sb-125 5.OOE+00 2.50E+00 8.30E+00 STJ L2261 -01 08 Se-75 1.20E+00 1.30E+00 4.20E+00 STJ L2261-01 08 Zn-65 8.OOE-01 3.10E+00 I.OOE+01 STJ L2261-01 08 Zr-95 I.OOE-0I 0 1.70E+00 6.00E+00 LTW L2261-02 08 AcTh-228 -5.00E+00 4.20E1+00 1.50E+0O LTW L2261-02 08 Ag-108m 3.90E-01 7.20E-01 2.50E+00 LTW L2261-02 08 Ag-lOnm -1.30E+00 1.30E+00 4.80E+00 LTW L2261-02 08 Ba-140 -1.80E+00 2.30E+00 8.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-154

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L2261 -02 08 Be-7 1.96E+0I 8.40E2+00 2.70E3+01 LTW L2261-02 08 Ce-141 1.30E+00 1.60E+00 5.20E+00 LTW L2261-02 08 Ce-144 -9.OOE-0I 4.80E+00 1.60E+01 LTW L2261-02 08 Co-57 1.02E+00 6.40E-01 2.l0E+00 LTW L2261 -02 08 Co-58 -4.80E-0I 9.601E-01 3.40E+O0 LTW L2261-02 08 Co-60 1.92E+00 9.90E-01 3.20E+00 LTW L2261-02 08 Cr-51 7.OOE+00 1. lOE+01 3.60E+01 LTW L2261 -02 08 Cs-134 5.IOE-01 8.60E-01 3.OOE+00 LTW L2261-02 08 Cs-137 -2.32E+00 9.60E-01 3.60E+00 LTW L2261 -02 08 Fe-59 3.30E3+00 3.OOE+00 9.90E+00 LTW L2261-02 08 GROSS BETA 3.10E+00 l.OOE1+00 3.IOE+00*

LTW L2261-02 08 1-131 3.40E-01 2.40E3-01 8. 10E-01 LTW L2261-02 08 K-40 -1.30E+01 I1.501E+01 5.40E+01 LTW L2261-02 08 La-140 -2.10OE+00 2.60E+00 9.80E+00 LTW L2261 -02 08 Mn-54 -5.10E-01 8.20E-01 3.OOE+00 LTW L2261-02 08 Nb-95 -4.OOE-01 1.20E+00 4.30E+00 LTW L2261-02 08 Ru-103 -2. 10E+00 1.1OE+00 4.OOE+00 LTW L2261-02 08 Ru-106 -1.35E+01 8.80E+00 3.20E+01 LTW L2261-02 08 Sb-124 -3.00E-01 2.30E+00 8.30E+00 LTW L2261-02 08 Sb-125 -2.90E+00 2.20E+00 8.OOE+00 LTW L2261-02 08 Se-75 -4.10E-01 9.901E-01 3A40E+00 LTW L2261-02 08 Zn-65 -8.OOE-01 2.70E+00 9.60E+00 LTW L2261-02 08 Zr-95 1.1OE+00 I1.70E+00 5.701E+00 STJ L2358-01 09 AcTh-228 -I.OOE+00 4.10OE+00 I1.401E+01 STJ L2358-01 09 Ag-108m -8.00E-02 6.20E-01 2.10E+O0 STJ L2358-01 09 Ag-1 10m -1.80E+00 1.1OE+00 4. 10E+00 STJ L2358-01 09 Ba-140 8.OOE-01 2.001E+00 6.901E+00 STJ L2358-01 09 Be-7 5.OOE+00 7.40E+00 2.50E+01 STJ L2358-01 09 Ce-141 -5.90E+00 2.40E+00 8.20E+00 STJ L2358-01 09 Ce-144 -8.90E+00 5.OOE+00 1.70E+01 STJ L2358-01 09 Co-57 6.60E-01 6.40E-01 2.10OE+00 STJ L2358-01 09 Co-58 -1.77E+00 8.20E-01 3.OOE+00 STJ L2358-01 09 Co-60 4.70E-01 8.30E-01 2.801E+00 STJ L2358-01 09 Cr-51 3.50E+00 8.80E-i00 3.001E+01 STJ L2358-0 09 Cs-134 -8.10E-01 8.60E-01 3.OOE+00 STJ L2358-01 09 Cs-137 9.60E-0O 7.60E-01 2.50E+00 STJ L2358-01 09 Fe-59 -1 .90E+00 2.40E+00 8.401E+00 STJ L2358-01 09 GROSS BETA 2.43E+00 7. 1O-01 2.10E+00 *

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-155

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ 12358-01 09 1-131 -5.00E-02 2.00E-01 9.00E-01 STJ L2358-01 09 K-40 5.00E+00 1.40E+01 4.70E+01 STJ L2358-01 09 La-140 9.OOE-0O 2.30E+00 7.902+00 STJ L2358-01 09 Mn-54 5.30E-01 8.20E-01 2.802+00 STJ L2358-01 09 Nb-95 3.50E-01 9.80E-01 3.30E+00 STJ L2358-01 09 Ru-103 -5.30E-0O 9.80E-01 3.40E+00 STJ L2358-01 09 Ru-106 -1.69E+01 7. 1OE+00 2.50E+01 STJ L2358-01 09 Sb-124 2.80E+00 2.20E+00 7.30E+00 STJ L2358-01 09 Sb-125 1.30E+00 1.902+00 6.50E+00 STJ L2358-01 09 Se-75 -2.40E+00 1.00E+00 3.60E+00 STJ L2358-01 09 Zn-65 -3.80E+00 1.70E+00 6.302+00 STJ L2358-01 09 Zr-95 -2.10E+00 1.40E+00 4.90E+00 LTW L2358-02 09 AcTh-228 8.20E+00 3.60E+00 1.202+01 LTW L2358-02 09 Ag-108m -5.20E-01 8.30E-01 2.90E+00 LTW L2358-02 09 Ag-1 10m 9.00E-01 1.30E+00 4.50E+00 LTW L2358-02 09 Ba-140 1.OOE-01 1.80E+00 6.40E+00 LTW L2358-02 09 Be-7 -1.75E+01 7.70E+00 2.90E+01 LTW L2358-02 09 Ce- 141 3.00E-0O 1.402+00 4.90E+00 LTW L2358-02 09 Ce-144 8.00E-01 5.00E+00 1.702+01 LTW L2358-02 09 Co-57 6.80E-01 6.50E-01 2.20E+00 LTW L2358-02 09 Co-58 -5.OOE-02 9.40E-01 3.30E+00 LTW L2358-02 09 Co-60 2.OOE-01 1.00E+00 3.60E+00 LTW L2358-02 09 Cr-51 -7.30E+00 9.70E+00 3.40E+01 LTW L2358-02 09 Cs-134 8.102-01 9.40E-01 3.20E+00 LTW L2358-02 09 Cs- 137 1.50E+00 1.00E+00 3.30E+00 LTW L2358-02 09 Fe-59 2.90E+00 2.90E+00 9.90E+00 LTW L2358-02 09 GROSS BETA 2.29E+00 6.90E-01 2.10E+00 LTW L2358-02 09 1-131 8.502-01 3.50E-01 8.70E-01 LTW L2358-02 09 K-40 8.00E+00 1.60E+01 5.30E+01 LTW L2358-02 09 La-140 1.OOE-01 2.00E+00 7.40E+00 LTW L2358-02 09 Mn-54 -2.34E+00 8.50E-01 3.40E+00 LTW L2358-02 09 Nb-95 -1.90E+00 1.IOE+00 4.20E+00 LTW L2358-02 09 Ru-103 4.00E-01 1.00+00 3.60E+00 LTW L2358-02 09 Ru-106 -1.16E+01 8.90E+00 3.20E+01 LTW L2358-02 09 Sb-124 -3.40E+00 2.402+00 9.50E+00 LTW L2358-02 09 Sb-125 -5.402+00 2.40E+00 8.80E+00 LTW L2358-02 09 Se-75 -1.00E-01 1.00+00 3.50E+00 LTW L2358-02 09 Zn-65 2.30E+00 2.70E+00 8.80E+00 LTW L2358-02 09 Zr-95 2.20E+00 1.80E+00 6.10E+00

Radioactivity detected In sample (i.e., concentration > 3 X standard deviation)

. -156

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program

_- Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L2438-01 AcTh-228 1.60E+O1 5.90E+00 1.80E+O1 STJ L2438-01 Ag-108m -1.70E-01 9.50E-01 3.40E+O0 STJ L2438-01 Ag-I lOm -1.50E+00 1.50E+00 5.90E+O0 STJ L2438-01 Ba-140 -3.80E+O0 2.20E+00 9.30E+00 STJ L2438-01 Be-7 -8.30E+00 9.80E+00 3.60E+O1 STJ L2438-01 Ce-141 -4.60E+O0 1.80E+00 6.80E+00 STJ L2438-01 Ce-144 2.90E+O0 6.70E+00 2.30E+O1 STJ L2438-01 Co-57 -4.30E-OI 8.20E-01 2.90E+00 STJ L2438-01 Co-58 -1.80E+00 I.1OE+00 4.40E+O0 STJ L2438-01 Co-60 1.30E+00 1.40E+00 5.OOE+00 STJ L2438-01 Cr-51 4.OOE+00 1.20E+01 4.00E+01 STJ L2438-01 Cs-134 -1 .OOE-0O 1.30E+00 4.70E+00 STJ L2438-01 Cs-137 3.OOE-O1 1.40E+00 4.90E+00 STJ L2438-01 Fe-59 3.60E+00 3.IOE+O0 I.1OE+01 STJ L2438-01 GROSS BETA 3.77E+O0 6.70E-01 I.90E+00 STJ L2438-01 1-131 -I .OOE-01 1.50E-01 8.60E-01 STJ L2438-01 K-40 6.20E+O1 1.50E+01 3.80E+01 STJ L2438-01 La-140 -4.40E+O0 2.50E+00 I.IOE+01 STJ L2438-01 Mn-54 O.OOE+O0 l.1OE+O0 3.80E+00 STJ L2438-01 Nb-95 l .OOE-OI 1.40E+00 5.IOE+O0 STJ L2438-01 Ru-103 -1.70E+00 1.40E+00 5.OOE+O0 STJ L2438-01 Ru-106 3.OOE+00 1.IOE+OI 3.80E+O1 STJ L2438-01 Sb-124 1.50E+O0 3.1OE+O0 1.lOE+OI STJ L2438-01 Sb-125 2.80E+OO 3.1OE+00 1.OOE+O1 STJ L2438-01 Se-75 4.OOE-O1 1.30E+00 4.50E+00 STJ L2438-01 Zn-65 -2.60E+OO 2.60E+0O I.OOE+01 STJ L2438-01 Zr-95 4.20E+00 2.20E+00 7.10E+00 LTW L2438-02 AcTh-228 8.10E+00 6.20E+00 2.10E+0O LTW L2438-02 Ag-108m 3.OOE-01 l.lOE+O0 3.80E+00 LTW L2438-02 Ag-i lOm -1.40E+00 1.70E+00 6.40E+O0 LTW L2438-02 Ba-140 4.OOE-01 2.60E+00 9.40E+00 LTW L2438-02 Be-7 2.OOE+O0 1.OOE+01 3.60E+OI LTW L2438-02 Ce-141 -8.OOE-0O 2. 1OE+00 7.20E+00 LTW L2438-02 Ce-144 -2.OOE+00 7.10E+00 2.50E+01 LTW L2438-02 Co-57 1.20E-O1 9.70E-01 3.30E+00 LTW L2438-02 Co-58 -6.OOE-OI 1.30E+00 4.70E+00 LTW L2438-02 Co-60 5.OOE-O1 1.30E+00 4.80E+OO LTW L2438-02 Cr-51 -2.10E+0O 1.30E+01 4.60E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-157

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L2438-02 11 Cs-134 5.00E-01 1.20E+00 4.30E+00 LTW L2438-02 11 Cs-137 -1.00O+00 1.20E+00 4.60E+00 LTW L2438-02 11 Fe-59 -7.00E-01 4.20E+00 1.50E+01 LTW L2438-02 11 GROSS BETA 1.88E+00 6.30E-01 I.90E+O0 LTW L2438-02 11 1-131 -1.80E-01 1.30E-01 9.40E-01 LTW L2438-02 11 K-40 -1.30E+01 1.60E+01 5.902+01 LTW L2438-02 11 La-140 5.00E-01 3.00E+00 I.1OE+01 LTW L2438-02 11 Mn-54 4.00E-01 1.30E+00 4.70E+00 LTW L2438-02 11 Nb-95 -3.20E+00 1.60E+00 6. 10E+00 LTW L2438-02 11 Ru-103 4.00E-01 1.30E+00 4.60E+00 LTW L2438-02 11 Ru-106 1.30E+01 1.20E+01 3.90E+01 LTW L2438-02 11 Sb-124 -1.60E+00 3.00E+00 1.20E+01 LTW L2438-02 11 Sb-125 -3.60E+00 3.402+00 1.20E+01 LTW L2438-02 11 Se-75 1.80E+00 1.70E+00 5.80E+00 LTW L2438-02 11 Zn-65 -5.10E+00 3.10E3+00 1.202+01 LTW L2438-02 11 Zr-95 -1.50E+00 2.00E+00 7.60E+00 STJ L2529-01 13 AcTh-228 1.60E+01 5.70E+00 1.80E+01 STJ L2529-01 13 Ag-108m 8.00E-01 1.20E+00 4.10E+00 STJ L2529-01 13 Ag-ll0m -6.OOE-01 2.OOE+00 7.30E+00 STJ L2529-01 13 Ba-140 2.00E+00 3.30E+00 1.20E+01 STJ L2529-01 13 Be-7 -1.40E+01 1.20E+01 4.502+01 STJ L2529-01 13 Ce-141 -2.00E+00 2.80E+00 9.602+00 STJ L2529-01 13 Ce-144 -1.02E+01 9.50E+00 3.30E+01 STJ L2529-01 13 Co-57 3.00E-01 1.20E+00 4.10E+00 STJ L2529-01 13 Co-58 -3.002-01 1.502+00 5.40E+00 STJ L2529-01 13 Co-60 -1.702+00 1.402+00 5.70E+00 STJ L2529-01 13 Cr-51 -2.002+00 1.602+01 5.402+01 STJ L2529-01 13 Cs-134 1.70E+00 1.302+00 4.50E+00 STJ L2529-01 13 Cs-137 -2.00E+00 1.502+00 5.702+00 STJ L2529-01 13 Fe-59 -9.00E+00 3.902+00 1.602+01 STJ L2529-01 13 GROSS BETA 7.51E+00 9.20E-01 2.202+00 STJ L2529-01 13 1-131 1.702-01 2.40E-01 9.602-01 STJ L2529-01 13 K-40 -4.40E+01 2.002+01 7.70E+01 STJ L2529-01 13 La-140 2.302+00 3.802+00 1.302+01 STJ L2529-01 13 Mn-54 -1.002-01 1.40E+00 5.102+00 STJ L2529-01 13 Nb-95 -3.002-01 1.802+00 6.40E+00 STJ L2529-01 13 Ru-103 -3.00E+00 1.80E+00 6.60E+00 STJ L2529-01 13 Ru-106 5.00E+00 1.30E+01 4.602+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-158

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L2529-01 13 Sb-124 5.20E+00 3.70E+00 1.20E+0O STJ L2529-01 13 Sb-125 -8.80E+00 3.80E+00 1.40E+0I STJ L2529-01 13 Se-75 8.OOE-01 I.90E+00 6.30E+00 STJ L2529-01 13 Zn-65 I.IOE+0I 5.70E+0O 1.90E+OI STJ L2529-01 13 Zr-95 -2.40E+00 2.90E+0O 1.OOE+01 LTW L2529-02 13 AcTh-228 -3.90E+00 6.40E+00 2.40E+01 LTW L2529-02 13 Ag-108m 1.50E+00 1.20E+00 4.OOE+00 LTW L2529-02 13 Ag-I Orm 4.OOE+00 2.OOE+00 6.40E+0O LTW L2529-02 13 Ba-140 -6.OOE-01 3.30E+00 1.30E+01 LTW L2529-02 13 Be-7 1.80E+01 1.30E+01 4.20E+01 LTW L2529-02 13 Ce-141 5.OOE-01 2.30E+00 7.80E+00 LTW L2529-02 13 Ce-144 -2.40E+00 7.20E+00 2.50E+01 LTW L2529-02 13 Co-57 2.OOE-02 9.30E-01 3.20E+00 LTW L2529-02 13 Co-58 -2.40E+00 1.50E+00 6.10E+00 LTW L2529-02 13 Co-60 8.OOE-01 1.80E+00 6.30E+0O LTW L2529-02 13 Cr-51 2.60E+01 1.50E+01 4.80E+O1 LTW L2529-02 13 Cs-134 3.OOE-01 1.80E+00 6.30E+00 LTW L2529-02 13 Cs-137 -5.OOE-01 1.60E+00 5.90E+00 LTW L2529-02 13 Fe-59 7.80E+00 4.70E+00 1.50E+01 LTW L2529-02 13 GROSS BETA 4.36E+00 7.90E-01 2.1OE+O0 LTW L2529-02 13 1-131 6.OOE-02 1.40E-01 6.20E-01 LTW L2529-02 13 K-40 -3.OOE+00 I.90E+01 7.20E+0O LTW L2529-02 13 La-140 -7.OOE-01 3.80E+00 1.40E+0O LTW L2529-02 13 Mn-54 7.00E-01 1.60E+00 5.70E+00 LTW L2529-02 13 Nb-95 1.30E+00 1.90E+00 6.70E+00 LTW L2529-02 13 Ru-103 9.OOE-01 1.60E+00 5.40E+00 LTW L2529-02 13 Ru-106 -1.20E+01 1.30E+01 4.90E+01 LTW L2529-02 13 Sb-124 -8.OOE-01 4.80E+00 1.80E+01 LTW L2529-02 13 Sb-125 4.OOE+00 3.70E+00 1.20E+01 LTW L2529-02 13 Se-75 -2.60E+00 I.90E+00 6.70E+00 LTW L2529-02 13 Zn-65 -5.70E+00 3.80E+00 1.50E+0I LTW L2529-02 13 Zr-95 1.70E+00 2.60E+00 8.90E+00 STJ L2683-01 15 AcTh-228 -4.40E+00 5.1OE+00 1.80E+01 STJ L2683-01 15 Ag-108m 3.OOE-0 1.OOE+00 3.50E+0O STJ L2683-01 15 Ag-I Orm -3.10E+00 1.60E+00 6.20E+00 STJ L2683-01 15 Ba-140 -9.OOE-01 3.00E+00 1.IOE+01 STJ L2683-01 15 Be-7 -8.00E+00 I.IOE+0O 3.90E+O1 STJ L2683-01 15 Ce-141 5.OOE-01 2.10E+00 7.OOE+O0

Radioactivity detected in sample (i.e., concentration > 3 X standard deviatiom)

D-159

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L2683-01 15 Ce-144 3.00E-01 6.50E+00 2.20E+01 STJ L2683-01 15 Co-57 -2.OOE-02 8.10E-01 2.80E+OO STJ L2683-01 15 Co-S8 -1.OOE+OO 1.20E+00 4.40E+OO STJ L2683-01 15 Co-60 l.90E+00 1.20E+00 4.OOE+00 STJ L2683-01 15 Cr-51 -2.90E+01 1.40E+0I 5.20E+01 STJ L2683-01 15 Cs-134 1.90E+00 1.IOE+O0 3.50E+00 STJ L2683-01 15 Cs-137 -2.10E+00 1.20E+00 4.40E+00 STJ L2683-01 15 Fe-59 7.60E+00 3.90E+00 1.20E+01 STJ L2683-01 15 GROSS BETA 3.30E+00 1.IOE+00 3.10E+00 STJ L2683-01 15 1-131 -2.20E-01 2.20E-01 9.80E-01 STJ L2683-01 15 K-40 1.IOE+01 1.70E+01 5.80E+01 STJ L2683-01 15 La-140 -I.OOE+00 3.50E+00 1.30E+01 STJ L2683-01 15 Mn-54 1.30E+0O 1.I1OE+00 3.70E+00 STJ L2683-01 15 Nb-95 -2.70E+00 1.70E+00 6.40E3+00 STJ L2683-01 15 Ru-103 -1.IOE+00 1.50E1+00 5.20E+0O STJ L2683-01 15 Ru-106 I.OOE+O0 1.IOE+01 4.00E+0O STJ L2683-01 15 Sb-124 -5.40E+00 3.00E+00 1.20E+01 STJ L2683-01 15 Sb-125 0.OOE+00 3.10E+00 1.1OE+01 STJ L2683-01 15 Se-75 0.OOE+00 1.50E+00 5.20E+00 STJ L2683-01 15 Zn-65 -5.00E-01 2.50E+00 9.10E+00 STJ L2683-01 15 Zr-95 1.OOE-O1 2.40E+00 8.30E+00 LTW L2683-02 15 AcTh-228 -3.00E-01 4.70E+00 1.70E+01 LTW L2683-02 15 Ag-108m -3.20E-01 9.10E-01 3.20E+00 LTW L2683-02 15 Ag-i lOm 3.30E+00 1.60E+00 5.00E+00 LTW L2683-02 15 Ba-140 -1.OOE-0O 2.90E+00 1.1OE+0O LTW L2683-02 15 Be-7 -1.08E+01 9.90E+00 3.60E+01 LTW L2683-02 15 Ce-141 1.OOE+00 1.60E+00 5.50E+00 LTW L2683-02 15 Ce-144 1.IOE+00 5.80E+00 2.00E+01 LTW L2683-02 15 Co-57 5.30E-01 7.40E-01 2.50E+00 LTW L2683-02 15 Co-58 -8.OOE-01 1.IOE+00 4.10E+00 LTW L2683-02 15 Co-60 -1.80E+00 I.IOE+O0 4.20E+00 LTW L2683-02 15 Cr-5I -2.60E+01 1.40E+01 5.10E+01 LTW L2683-02 15 Cs-134 -6.00E-01 I.OOE+00 3.80E+00 LTW L2683-02 15 Cs-137 1.OOE-O1 1.20E1+00 4.10E+00 LTW L2683-02 15 Fe-59 7.00E-01 3.40E+00 1.20E+01 LTW L2683-02 15 GROSS BETA 3.00E+00 1.IOE+00 3.30E+00 LTW L2683-02 15 1-131 1.30E-01 2.10E-01 8.10E-01 LTW L2683-02 15 K-40 1.20E+01 1.80E+01 6.10E+01 LTW L2683-02 15 La-140 -I.OOE-0I 3.30E+00 1.20E+01 LTW L2683-02 15 Mn-54 - 1.70E+0O 1.OOE+00 3.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-160

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L2683-02 15 Nb-95 -2.OOE-O1 1.40E+00 4.90E+00 LTW L2683-02 15 Ru-103 -3.40E+00 1.40E+00 5.10E+00 LTW L2683-02 15 Ru-106 2.OOE+00 1.1OE+O1 3.80E+01 LTW L2683-02 15 Sb-124 -1.70E+00 2.90E+O0 1.lOE+01 LTW L2683-02 15 Sb-125 -2.60E+00 2.80E+O0 1.OOE+01 LTW L2683-02 15 Se-75 1.50E+00 1.20E+00 4.10E+00 LTW L2683-02 15 Zn-65 3.OOE+00 2.40E+00 8.OOE+O0 LTW L2683-02 15 Zr-95 2.70E+00 2.30E+00 7.90E+00 STI L2766-01 17 AcTh-228 6.50E+O0 2.80E+00 8.80E+O0 STJ L2766-01 17 Ag-108m -5.20E-01 6.10E-01 2.1OE+00 STJ L2766-01 17 Ag-ll0m 6.OOE-01 I. IOE+00 3.70E+O0 STr L2766-01 17 Ba-140 1.40E+00 2.20E+00 7.70E+O0 STJ L2766-01 17 Be-7 -2.OOE+OO 7.20E+00 2.50E+01 STI L2766-01 17 Ce-141 -5.OOE-01 1.80E+00 6.10E+00 STJ L2766-01 17 Ce-144 -6.20E+00 3.90E+00 1.40E+01 STJ L2766-01 17 Co-57 -2.20E-01 7.10E-01 2.40E+00 STJ L2766-01 17 Co-58 4.40E-01 7.60E-01 2.60E+00 STJ L2766-01 17 Co-60 -2.00E-02 8.10E-01 2.90E+00 STJ L2766-01 17 Cr-51 -8.40E+O0 9.OOE+00 3.1OE+01 STJ L2766-01 17 Cs-134 -7.40E-01 7.60E-01 2.70E+0O STJ L2766-01 17 Cs-137 5.OOE-02 7.60E-01 2.60E+00 STJ L2766-01 17 Fe-59 3.50E+00 2.60E+00 8.60E+00 STJ L2766-01 17 GROSS BETA 2.33E+0O 4.80E-01 1.40E+00

STJ L2766-01 17 1-131 2.80E-01 2.30E-01 7.70E-O1 STJ L2766-01 17 K-40 9.OOE+00 1.50E+01 5.OOE+01 sT3 L2766-01 17 La-140 1.70E+0O 2.60E+00 8.80E+0O STJ U2766-01 17 Mn-54 -8.90E-01 7.OOE-01 2.50E+00 STJ L2766-01 17 Nb-95 -2.30E-01 9.90E-01 3.50E+00 STJ L2766 17 Ru-103 -1.36E+0O 9.30E-01 3.30E+O0 STJ L2766-01 17 Ru-106 -9.OOE-O1 7.60E+00 2.60E+01 STJ L2766-01 17 Sb-124 1.70E+00 2.20E+00 7.50E+O0 STJ L2766-01 17 Sb-125 -2.70E+0O 1.90E+00 6.70E+O0 STJ L2766-01 17 Se-75 -1.60E+00 8.30E-01 3.OOE+O0 STI L2766-01 17 Zn-65 -1.90E+00 2.10E+00 7.60E+00 STJ L2766-01 17 Zr-95 -3.OOE-O1 1.50E+00 5.20E+00 LTW L2766-02 17 AcTh-228 -2.00E-O1 5.30E+00 1.90E+01 LTW L2766-02 17 Ag-108m -2.30E+0O 9.10E-01 3.50E+0O LTW L2766-02 17 Ag-llbm 8.OOE-O1 1.40E+00 5.OOE+0O

Radioactivity detected in sample (ie., concentration > 3 X standard deviation)

D-161

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L2766-02 17 Ba-140 5.10E+00 3.30E+00 I.IOE+01 LTW L2766-02 17 Be-7 -2.60E+0I I.1OE+01 4.20E+01 LTW L2766-02 17 Ce-141 1.60E+00 2.40E+00 8.00E+00 LTW L2766-02 17 Ce-144 2.40E+00 6.20E+00 2.10E+0l LTW L2766-02 17 Co-57 -1.41E+00 9.20E-01 3.30E+00 LTW L2766-02 17 Co-58 -2.20E+00 1.20E+00 4.60E+00 LTW L2766-02 17 Co-60 1.lOE+00 1.30E+00 4.60E+00 LTW L2766-02 17 Cr-SI 4.OOE+00 1.50E+01 5.00E+0O LTW L2766-02 17 Cs-134 6.OOE-OI I.IOE+00 3.90E+0O LTW L2766-02 17 Cs-137 0.OOE+00 1.20E+00 4.40E+00 LTW L2766-02 17 Fe-59 5.OOE-01 3.70E+00 1.30E+0I LTW L2766-02 17 GROSS BETA 1.95E+00 4.80E-01 1.50E+00 LTW L2766-02 17 1-131 3.20E-01 2.80E-0l l.OOE+00 LTW L2766-02 17 K-40 -3.00E+00 I.90E+01 6.60E+01 LTW L2766-02 17 La-140 5.80E+00 3.80E+00 1.30E+0I LTW L2766-02 17 Mn-54 -1.20E+00 1.IOE+00 4.20E+00 LTW L2766-02 17 Nb-95 1.OOE+00 1.60E+00 5.40E+00 LTW L2766-02 17 Ru-103 7.OOE-01 1.40E+00 4.80E+00 LTW L2766-02 17 Ru-106 -7.OOE+00 1.20E+01 4.1OE+OI LTW L2766-02 17 Sb-124 5.00E-01 3.00E+00 1.1OE+0I LTW L2766-02 17 Sb-125 4.60E+00 3.OOE+00 I.OOE+01 LTW L2766-02 17 Se-75 -3.OOE-01 1.30E+00 4.70E+00 LTW L2766-02 17 Zn-65 -3.00E+00 2.60E+00 1.OOE+01 LTW L2766-02 17 Zr-95 -3.00E-01 2.20E+00 7.80E+00 STJ L2860-01 19 AcTh-228 -4.70E+00 4.70E+00 1.70E+0O STJ L2860-01 19 Ag-108m 1.03E+00 8.20E-01 2.70E+00 STJ L2860-01 19 Ag-lOnm O.OOE+00 1.50E+00 5.40E+00 STJ L2860-01 19 Ba-140 -7.00E-01 2.1OE+00 8.10E+00 STJ L2860-01 19 Be-7 7.20E+00 9.OOE+00 3.10E+I01 STJ L2860-01 19 Ce-141 0.OOE+00 1.60E+00 5.60E+00 STJ L2860-01 19 Ce-144 5.20E+00 5.70E+00 1.90E+0I STJ L2860-01 19 Co-57 5.70E-01 8.30E-01 2.80E+00 STJ L2860-01 19 Co-58 2.IOE+00 1.IOE+00 3.50E+00 STJ L2860-01 19 Co-60 -1.50E+00 I.IOE+00 4.40E+00 STJ L2860-01 19 Cr-51 -2.OOE+00 1.IOE+0I 3.90E+01 STJ L2860-01 19 Cs-134 -1.20E+00 I.OOE+00 3.90E+00 STJ L2860-01 19 Cs-137 -I.IOE+00 1.IOE+00 4.10E+00 STJ L2860-01 19 Fe-59 1.20E+00 3.40E1+00 1.20E+0O

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-162

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L2860-01 19 GROSS BETA 2.30E+00 5.60E-01 1.70E+00 STJ L2860-01 19 1-131 3.OOE-02 2.40E-01 9.30E-0O STJ L2860-01 19 K-40 -4.OOE+00 1.60E+0O 5.80E+01 STJ L2860-01 19 Ln-140 -8.00E-01 2.50E+00 9.30E+00 STJ L2860-01 19 Mn-54 -1.38E+00 9.40E-01 3.60E+00 STJ L2860-01 19 Nb-95 -I.IOE+O0 1.20E+00 4.50E+00 STJ L2860-01 19 Ru-103 I.OOE+00 1.20E+00 4.00E+00 STJ L2860-01 19 Ru-106 1.OOE+00 1.OOE+01 3.60E+01 STJ L2860-01 19 Sb-124 1.60E+00 2.70E+00 9.50E+00 STJ L2860-01 19 Sb-125 2.OOE+00 2.60E+00 8.90E+00 STJ L2860-01 19 Se-75 -2.80E+00 I.IOE+00 4.10E+00 STJ L2860-01 19 Znb5 -7.OOE-01 2.10E+00 7.80E+00 STJ L2860-01 19 Zr-95 3.OOE+00 1.90E+00 6.30E+00 LTW L2860-02 19 AcTh-228 -3.00E+00 4.00E+00 1.50E+01 LTW L2860-02 19 Ag-108m 8.80E-01 9.30E-01 3.10E+00 LTW L2860-02 19 Ag-110m -8.OOE-01 1.60E+00 5.70E+00 LTW L2860-02 19 Ba-140 O.OOE+00 2.30E+00 8.30E+00 LTW L2860-02 19 Be-7 -5.30E+00 9.80E+00 3.50E+0O LTW L2860-02 19 Ce-141 -8.30E+00 3.20E+00 1.20E+0O LTW L2860-02 19 Ce-144 -2.10E+00 6.50E+00 2.20E+0O LTW L2860-02 19 Co-57 -8.OOE-01 8.10E-01 2.80E+00 LTW L2860-02 19 Co-58 -2.00E-01 1I.1OE+00 4.OOE+00 LTW L2860-02 19 Co-60 1.OOE+00 1.IOE+00 3.70E+00 LTW L2860-02 19 Cr-51 -6.OOE+00 1.30E+01 4.40E+01 LTW L2860-02 19 Cs-134 7.OOE-01 1.20E+00 4.20E+00 LTW L2860-02 19 Cs-137 -1.OOE-0 1.20E+00 4.20E+00 LTW L2860-02 19 Fe-59 3.40E+00 3.30E+00 I.IOE+01 LTW L2860-02 19 GROSS BETA 2.51E+00 5.80E-01 1.70E+00 LTW L2860-02 19 1-131 -1.90E-01 2.30E-01 9.OOE-01 LTW L2860-02 19 K-40 2.70E+01 2.OOE+01 6.50E+0O LTW L2860-02 19 La-140 Q.OOE+00 2.60E+00 9.60E+00 LTW L2860-02 19 Mn-54 1.IOE+00 1.IOE+00 3.80E+00 LTW L2860-02 19 Nb-95 1.60E+00 1.40E+00 4.60E+00 LTW L2860-02 19 Ru-103 -4.OOE-01 1.20E+00 4.30E+00 LTW L2860-02 19 Ru-106 -8.00E+00 1.IOE+01 3.80E+0O LTW L2860-02 19 Sb-124 -4.00E-01 2.70E+00 1.OOE+01 LTW L2860-02 19 Sb-125 4.OOE+00 2.90E+00 9.80E+00 LTW L2860-02 19 Se-75 4.00E-01 1.50E+00 5.00E+00 LTW L2860-02 19 Zn-65 -2.80E+00 2.60E+00 9.60E+00 LTW L2860-02 19 Zr-95 3.OOE+00 2.OOE+00 6.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-163

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program

.Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCilkg)

STJ L2974-01 21 AcTh-228 5.70E+00 2.60E+00 8.50E+00 STJ L2974-01 21 Ag-108m -3.60E-01 5.80E-01 2.00E+00 STJ L2974-01 21 Ag-l lOm 4.00E-01 1.IOE+00 3.60E+00 STJ L2974-01 21 Ba-140 -3.00E+00 2.30E+00 8.40E+00 STJ L2974-01 21 Be-7 -1.40E+00 7. IOE+00 2.40E+01 STJ L2974-01 21 Ce-141 3.80E+00 1.40E+00 4.50E+00 STJ L2974-01 21 Ce-1 44 -2.50E+00 4.10E+00 1.402+01 STJ L2974-01 21 Co-57 3.30E-01 5.30E-01 1.80E+00 STJ L2974-01 21 Co-58 -3.60E-01 8.OOE-01 2.80E+00 STJ L2974-01 21 Co-60 3.60E-01 8.20E-01 2.80E+00 STJ L2974-01 21 Cr-51 -7.80E+00 9. 1OE+00 3.10E+01 STJ L2974-01 21 Cs-134 1.00E+00 7;40E-01 2.50E+00 STJ L2974-01 21 Cs-137 -5.OOE-01 7.10E-01 2.50E+00 STJ L2974-01 21 Fe-59 -1.90E+00 2.40E+00 8.70E+00 STJ L2974-01 21 GROSS BETA 2.75E+00 6.00E-01 1.80E+00 STJ L2974-01 21 1-131 -1.30E-01 2.00E-01 9.20E-01 STJ L2974-01 21 K-40 1.40E+01 1.30E+0O 4.30E+01 STJ L2974-01 21 La-140 -3.50E+00 2.60E+00 9.602+00 STJ L2974-01 21 Mn-54 -4.00E-02 7.30E-01 2.50E+00 STJ L2974-01 21 Nb-95 0.00E+00 1.00E+00 3.50E+00 STJ L2974-01 21 Ru-103 -1.80E-01 9.70E-01 3.30E+00 STJ L2974-01 21 Ru-106 4.80E+00 6.60E+00 2.20E+OI STJ L2974-01 21 Sb- 124 -7.OOE-01 1.90E+00 6.90E+00 STJ L2974-01 21 Sb-125 -1.00E-01 1.90E+00 6.50E+00 STJ L2974-01 21 Se-75 -1. 14E+00 9.70E-01 3.302+00 STJ L2974-01 21 Zn-65 -4.1 OE+00 1.902+00 7.10E+00 STJ L2974-01 21 Zr-95 -2.90E+00 1.30E+00 4.90E+00 LTW L2974-02 21 AcTh-228 6.80E+00 4.10E+00 1.30E+01 LTW L2974-02 21 Ag-108m 3.40E-01 8.30E-01 2.80E+00 LTW L2974-02 21 Ag-I lOm 7.OOE-01 1.50E+00 5.30E+00 LTW L2974-02 21 Ba-140 4.00E-01 3.40E+00 1.20E+01 LTW L2974-02 21 Be-7 3.60E+00 9.00E+00 3. 10E+01 LTW L2974-02 21 Ce-141 1.60E+00 2.40E+00 7.80E+00 LTW L2974-02 21 Ce- 144 -1 .OOE+00 5. 10E+00 1.70E+01 LTW L2974-02 21 Co-57 -7.90E-01 6.30E-01 2.20E+00 LTW L2974-02 21 Co-58 l .OOE+00 1.00E+00 3.50E+00 LTW L2974-02 21 Co-60 8.OOE-01 1.20E+00 4.00E+00 LTW L2974-02 21 Cr-51 1.20E+01 l .10E+01 3.70E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-164

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L2974-02 21 Cs-134 -1.50E+00 I.OOE+00 3.80E+O0 LTW L2974-02 21 Cs-137 -4.OOE-0 I.1OE+O0 4.OOE+00 LTW L2974-02 21 Fe-59 -1.80E+00 3.90E+00 1.40E+0O LTW L2974-02 21 GROSS BETA 3.10E+00 6.20E-01 1.80E+00 LTW L2974-02 21 1-131 3.OOE-01 2.40E-01 8.20E-01 LTW L2974-02 21 K-40 -8.OOE+00 1.80E+01 6.40E+O1 LTW L2974-02 21 La-140 5.OOE-01 3.90E+00 1.40E+O1 LTW L2974-02 21 Mn-54 -I.OOE-0 1.1OE+00 3.90E+00 LTW L2974-02 21 Nb-95 -3.40E+00 1.70E+00 6.30E+00 LTW L2974-02 21 Ru-103 6.OOE-01 1.30E+00 4.30E+00 LTW L2974-02 21 Ru-106 -2.17E+01 9.50E+00 3.50E+0O LTW L2974-02 21 Sb-124 -3.50E+00 3.30E+00 1.30E+01 LTW L2974-02 21 Sb-125 -1.50E+00 2.60E+00 9.10E+0O LTW L2974-02 21 Se-75 2.20E+00 1.20E+00 3.90E+00 LTW L2974-02 21 Zn-65 -1.30E+00 3.20E+00 1.20E+01 LTW L2974-02 21 Zr-95 l.OOE+O0 1.90E+00 6.60E+00 STJ L3113-01 23 AcTh-228 -5.OOE-01 2.40E+00 9.70E+00 STJ U3113-01 23 Ag-108m 2.OOE-01 5.30E-01 1.80E+00 STJ L3113-01 23 Ag-llOm 8.60E-01 8.70E-01 2.90E+00 STJ 13113-01 23 Ba-140 -8.OOE-01 1.80E+00 6.30E+00 STJ L3113-01 23 Be-7 1.37E+01 6.10E+00 2.OOE+0O STJ 12113-01 23 Ce-141 -2.60E+00 2.10E+00 7.10E+00 STJ 12113-01 23 Ce-144 3.1OE+00 3.90E+00 1.30E+Ol STJ L3113-01 23 Co-57 3.80E-01 5.OOE-01 1.70E+00 STJ 12113-01 23 Co-58 -1.27E+00 7.70E-01 2.70E+00 STJ L3113-01 23 Co-60 -4.OOE-01 6.60E-01 2.40E+0O STJ L3113-01 23 Cr-51 -9.30E+00 7.80E+00 2.70E+0O STJ U3113-01 23 Cs-134 1. IIE+00 7.20E-01 2.40E+OO STJ L3113-01 23 Cs-137 -2.39E+00 7.00E-01 2.60E+OO STJ L3113-01 23 Fe-59 4.30E+00 2.OOE+00 6.50E+00 STJ L3113-01 23 GROSS BETA 4.56E+00 7.70E-01 2.OOE+OO STJ L3113-01 23 1-131 2.30E-01 2.70E-01 9.90E-OI STJ L3113-01 23 K40 1.70E+01 1.20E+01 3.80E+0O STJ L3113-01 23 La-140 -I.OOE+00 2.00E-+00 7.20E+00 STJ L3113-01 23 Mn-54 1.70E-01 6.70E-01 2.30E+00 STJ U3113-01 23 Nb-95 3.OOE-01 1.20E+00 4.OOE+00 STJ 12113-01 23 Ru-103 -1.38E+00 7.90E-01 2.80E+00 STJ 13113-01 23 Ru-106 2.50E+00 6.OOE+00 2.OOE+0O

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-165

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L3113-01 23 Sb-124 -I.SOE+00 1.80E+00 6.60E+00 STJ L3113-01 23 Sb-125 9.00E-01 1.70E+00 5.70E+O0 STJI L3113-01 23 Sc-75 -1.57E+00 8.70E-01 3.OOE+00 STJ L3113-01 23 Zn-65 -4.80E+00 2.20E+00 8.1OE+00 STJ L3113-01 23 Zr-95 1.20E+00 1.20E+00 4.1OE+O0 LTW L3113-02 23 AcTh-228 -2.80E+00 3.70E+00 1.30E+0O LTW L3113-02 23 Ag-108m 7.70E-01 5.30E-01 1.70E+O0 LTW L3113-02 23 Ag-llOm -7.70E-01 8.50E-01 3.OOE+O0 LTW L3113-02 23 Ba-140 -1.40E+00 1.70E+00 6.00E+00 LTW L3113-02 23 Be-7 9.70E+00 5.70E+O0 I.90E+01 LTW L3113-02 23 Ce-141 -2.80E+00 1.70E+00 6.OOE+O0 LTW U2113-02 23 Ce-144 3.1OE+00 3.30E+00 1.IOE+01 LTW L3113-02 23 Co-57 4.00E-02 4.101E-01 1.40E+0O LTW L3113-02 23 Co-58 2.90E-01 6.30E-01 2.1OE+00 LTW L3113-02 23 Co-60 -1.32E+00 6.40E-01 2.40E+O0 LTW L3113-02 23 Cr-51 -I.OIE+01 7.10E+00 2.50E+0O LTW L3113-02 23 Cs-134 1.60E-01 6.30E-01 2.20E+00 LTW L3113-02 23 Cs-137 -4.40E-01 6.30E-01 2.20E+00 LTW L3113-02 23 Fe-59 -2.60E+00 1.50E+00 5.40E+00 LTW L3113-02 23 GROSS BETA 2.82E+00 7.40E-01 2.20E+00 LTW L3113-02 23 1-131 2.OOE-02 2.10E-01 9.1OE-01 LTW L3113-02 23 K-40 5.OOE+00 1.20E+01 4.10E+01 LTW L3113-02 23 La-140 -1.60E+00 1.90E+00 6.90E+00 LTW L3113-02 23 Mn-54 -1.09E+00 5.70E-01 2.10E+00 LTW L3113-02 23 Nb-95 2.90E+00 1.20E+00 3.90E+00 LTW L3113-02 23 Ru-103 -2.52E+00 7.40E-01 2.70E+00 LTW 12113-02 23 Ru-106 -2.60E+00 5.90E+00 2.00E+0O LTW L3113-02 23 Sb-124 -6.20E+00 2.40E+00 9.30E+00 LTW W3113-02 23 Sb-125 -5.00E-01 1.50E+00 5.20E+00 LTW L3113-02 23 Se-75 -1.29E+00 6.60E-01 2.30E+00 LTW L3113-02 23 Zn-65 -8.00E-01 1.80E+00 6.30E+00 LTW L3113-02 23 Zr-95 2.00E-01 1.20E+00 4.OOE+00 STJ L3207-01 25 AcTh-228 4.00E-01 3.OOE+00 1.IOE+01 STJ L3207-01 25 Ag-108m -4.40E-01 7.30E-01 2.70E+00 STJ L3207-01 25 Ag-I lOm 1.60E-01 9.70E-01 3.60E+00 STJ L3207-01 25 Ba-140 -I.OOE+00 2.70E+00 I.OOE+01 STJ W3207-01 25 Be-7 -2.70E+00 9.OOE+00 3.20E+01 STJ 12207-01 25 Ce-141 -3.OOE+00 2.10E+00 7.50E+00 Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-166

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L3207-01 25 Cc-144 -3.OOE+00 5.60E+00 2.OOE+O1 STJ L3207-01 25 Co-57 -6.80E-01 7.SOE-01 2.70E+00 STJ L3207-01 25 Co-58 -6.20E-01 9.OOE-01 3.40E+00 STJ L3207-01 25 Co-60 -6.70E-01 7.40E-01 3.OOE+00 STJ L3207-01 25 Cr-51 I.OOE+00 1.20E+01 4.20E+01 STJ L3207-01 25 Cs-134 -1.40E-01 7.30E-01 2.80E+00 STJ L3207-01 25 Cs-137 2.80E-01 8.60E-01 3.10E+00 STJ L3207-01 25 Fe-59 3.10E+00 2.60E+00 9.OOE+00 STJ L3207-01 25 GROSS BETA 5.42E+00 9.90E-01 2.60E+00 STJ L3207-01 25 1-131 -2.OOE-01 1.40E-01 6.20E-01 STJ L3207-01 25 K-40 4.OOE+00 1.20E+01 4.10E+01 STJ L3207-01 25 La-140 -1.20E+00 3.10E+00 1.20E+0O STJ L3207-01 25 Mn-54 1.31E+00 7.40E-01 2.40E+00 STJ L3207-01 25 Nb-95 -1.90E+00 1.20E+00 4.70E+00 STJ L3207-01 25 Ru-103 -6.OOE-0 1.IOE+00 4.OOE+00 STJ U3207-01 25 Ru-106 9.80E+00 7.80E+00 2.60E+01 STJ L3207-01 25 Sb-124 -3.60E+00 2.70E+00 I.IOE+01 STJ L3207-01 25 Sb-125 -1.40E+00 2.30E+00 1.60E+01 STJ L3207-01 25 Se-75 5.OOE-01 1.20E+00 4.20E+00 STJ L3207-01 25 Zn-65 -2.90E+00 1.60E+00 6.70E+00 STJ L3207-01 25 Zr-95 1.90E+00 1.40E+00 4.80E+00 LTW L3207-02 25 AcTh-228 3.30E+00 2.SOE+00 8.40E+OO LTW L3207-02 25 Ag-108m O.OOE+00 6.70E-01 2.40E+OO LTW L3207-02 25 Ag-lOrm I.OOE-0 l.OOE+00 3.70E+OO LTW L3207-02 25 Ba-140 1.OOE-01 2.10E+00 8.20E+OO LTW L3207-02 25 Be-7 -5.90E+00 8.20E+00 3.00E+01 LTW L3207-02 25 Ce-141 -5.OOE-01 1.8OE+00 6.40E+OO LTW L3207-02 25 Ce-144 3.40E+00 5.40E+00 1.80E+0O LTW L3207-02 25 Co-57 2.50E-01 6.70E-01 2.30E+00 LTW L3207-02 25 Co-58 9.20E-01 7.80E-01 2.70E+00 LTW L3207-02 25 Co-60 1.19E+00 7.40E-01 2.40E+00 LTW L3207-02 25 Cr-51 -7.OOE+00 1.IOE+OI 3.80E+01 LTW L3207-02 25 Cs-134 5.80E-01 7.70E-01 2.70E+00 LTW L3207-02 25 Cs-137 -4.50E-01 7.80E-01 2.90E+00 LTW L3207-02 25 Fe-59 -2.60E+00 2.50E+00 I.OOE+01 LTW L3207-02 25 GROSS BETA 6.80E+00 I.OOE+00 2.40E+00 LTW L3207-02 25 1-131 3.OOE-02 1.90E-01 7.90E-01 LTW L3207-02 25 K-40 1.IOE+OI 1.1OE+01 3.70E+01 LTW L3207-02 25 La-140 I.OOE-01 2.40E+00 9.50E+00 LTW L3207-02 25 Mn-54 -1.OIE+00 7.50E-01 3.OOE+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-167

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L3207-02 25 Nb-95 1.90E-01 9.60E-01 3.50E+00 LTW L3207-02 25 Ru-103 -2.60E+00 1.IOE+00 4.40E+00 LTW L3207-02 25' Ru-106 4.20E+00 7.50E+00 2.60E+01 LTW L3207-02 25 Sb-124 -2.103E+00 2.20E+00 9.102+00 LTW L3207-02 25 Sb-125 0.00+00 2.102+00 7.50E+00 LTW L3207-02 25 Se-75 1.87E+00 9.80E-01 3.202+00 LTW L3207-02 25 Zn-65 -5.OOE-01 1.70E+00 6.30E+00 LTW L3207-02 25 Zr-95 1.40E+00 1.50E+00 5.30E+00 STJ L3289-01 27 AcTh-228 -6.20E+00 5.40E+00 2.00E+01 STJ L3289-01 27 Ag-108m 6.00E-01 1.1OE+00 3.80E+00 STJ L3289-01 27 Ag-l lOm -1.00E+00 1.70E+00 6.30E+00 STJ L3289-01 27 Ba- 140 -1.80E+00 3.20E+00 1.20E+01 STJ L3289-01 27 Be-7 -2.10E+01 1.102+01 4.20E+01 STJ L3289-01 27 Ce-141 2.00E+00 2.20E+00 7.30E+00 STJ L3289-01 27 Ce-144 1.82E+01 7.30E+00 2.30E+01 STJ L3289-01 27 Co-57 8.30E-01 9.302-01 3.102+00 STJ L3289-01 27 Co-58 -2.30E+00 1.30E+00 5.00E+00 STJ L3289-01 27 Co-60 -1.40E+00 1.40E+00 5.50E+00 STJ L3289-01 27 Cr-51 3.40E+01 1.40E+01 4.402+01 STJ L3289-01 27 Cs-134 O.OOE+00 1.40E+00 4.90E+00 STJ L3289-01 27 Cs-137 -3.20E+00 1.30E+00 5.30E+00 STJ 12289-01 27 Fe-59 5.10+00 4.00E+00 1.40E+01 STJ L3289-01 27 GROSS BETA 5.311E+00 9.80E-01 2.50E+00 STJ L3289-01 27 1-131 2.70E-01 2.60E-01 9.40E-01 STJ L3289-01 27 K-40 4.20E+01 2.00E+01 6.50E+01 STJ L3289-01 27 La-140 -2.00E+00 3.70E+00 1.40E+01 STJ L3289-01 27 Mn-54 2.90E+00 1.40E+00 4.60E+00 STJ L3289-01 27 Nb-95 -2.50E+00 1.60E+00 6.00E+00 STJ L3289-01 27 Ru-103 -1.30E+00 1.50E+00 5.60E+00 STJ L3289-01 27 Ru-106 -1.10E+01 1.lOE+01 4.10E+01 STJ L3289-01 27 Sb-124 5.00E-01 3.40E+00 1.20E+01 STJ L3289-01 27 Sb-125 -4.90E+00 3.50E+00 1.30E+01 STJ L3289-01 27 Se-75 -1.20E+00 1.80E+00 6.20E+00 STJ L3289-01 27 Zn-65 -1.25E+01 3.70E+00 1.502+01 STJ L3289-01 27 Zr-95 -3.00E-01 2.10E+00 7.50E+00 LTW L3289-02 27 AcTh-228 4.40E+00 5.20E+00 1.80E+01 LTW L3289-02 27 Ag-108m 0.00+00 1.20E+00 4.20E+00 LTW L3289-02 27 Ag-Il Om -1.60E+00 1.90E+00 6.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-168

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW U3289-02 27 Ba-140 -4.00E-01 2.80E+00 1.OOE+01 LTW U3289-02 27 Be-7 -1.OOE+00 1.20E+01 4.30E+01 LTW U3289-02 27 Ce-141 -7.002-01 1.90E+00 6.50E+00 LTW U3289-02 27 Ce-144 -3. 10E+00 7.60E+00 2.60E+01 LTW L3289-02 27 Co-57 1.72E+00 9.50E-01 3.10E+00 LTW U3289-02 27 Co-58 6.00E-01 1.50E+00 5. IOE+00 LTW U3289-02 27 Co-60 I.00-01 1.30E+00 4.70E+00 LTW U3289-02 27 Cr-51 1.40E+01 1.30E+01 4.50E+01 LTW 12289-02 27 Cs-134 1.90E+00 1.50E+00 5.20E+00 LTW U3289-02 27 Cs-137 -5.OOE-01 1.50E+00 5.30E+00 LTW 12289-02 27 Fe-59 -7.90E+00 3.30E+00 1.40E+01 LTW U3289-02 27 GROSS BETA 3.92E+00 9.40E-01 2.60E+00 LTW U3289-02 27 1-131 -7.00E-02 1.80E-01 9.90E-01 LTW U3289-02 27 K-40 1.00E+00 1.90E+01 6.80E+01 LTW U3289-02 27 La-140 -5.00E-01 3.20E+00 1.20E+0I LTW U3289-02 27 Mn-54 l .OOE-01 1.20E+00 4.40E+00 LTW U3289-02 27 Nb-95 -2.00E-01 1.60E+00 5.90E+00 LTW U3289-02 27 Ru-103 2.20E+00 1.40E+00 4.50E+00 LTW U3289-02 27 Ru-106 1.10E+01 1.20E+01 4.00E+01 LTW U3289-02 27 Sb-124 -2.00E-OI 3.OOE+00 1.20E+01 LTW U3289-02 27 Sb-125 -1.1OE+00 3.50E+00 1.202+01 LTW U3289-02 27 Se-75 2.50E+00 1.80E+00 5.80E+00 LTW U3289-02 27 Zn-65 4.20E+00 5. 1OE+00 1.70E+01 LTW U3289-02 27 Zr-95 3. 1OE+00 2.60E+00 8.80E+00 STJ L3396-01 30 AcTh-228 4.50E3+00 3.20E+00 1.10E+01 STJ L3396-01 30 Ag-108m 9.00E-02 4.60E-01 1.60E+00 STJ L3396-01 30 Ag-i Orm 1.28E+00 7.90E-0I 2.60E+00 STJ L3396-01 30 Ba-140 3.20E+00 2.50E+00 8.50E+00 STJ L3396-01 30 Be-7 -5.70E+00 5.60E+00 1.90E+01 STJ L3396-01 30 Ce-141 -1.OOE+00 2.00E+00 6.60E+00 STJ L3396-01 30 Ce-144 4.30E+00 3.10E+00 l .OOE+01 STJ 12396-01 30 Co-57 -2.50E-01 4.10E-01 1.40E+00 STJ 12396-01 30 Co-58 -1.54E+00 6.40E-01 2.30E+00 STJ L3396-01 30 Co-60 6.30E-0I 6.OOE-01 2.00E+00 STJ 12396-01 30 Cr-51 -8.30E+00 8.20E+00 2.80E+01 STJ 12396-01 30 Cs-134 3.OOE-01 5.60E-01 1.90E+00 STJ 12396-01 30 Cs-137 -7.SOE-01 5.90E-01 2.10E+00 STJ U3396-01 30 Fe-59 1.70E+00 1.40E+00 4.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-169

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L3396-01 30 GROSS BETA 3.33E+00 8.30E-01 2.30E+00 STJ L3396-01 30 1-131 7.00E-02 1.40E-01 6.202-01 STJ L3396-01 30 K-40 -1.00E+00 1.10E+01 3.60E+01 STJ L3396-01 30 La-140 3.70E+00 2.90E+00 9.70E+00 STJ L3396-01 30 Mn-54 -6.40E-01 6.00E-01 2.10E+00 STJ L3396-01 30 Nb-95 -2.40E+00 1.30E+00 4.60E+00 STJ L3396-01 30 Ru-103 -6.80E-01 7.90E-01 2.70E+00 STJ L3396-01 30 Ru-106 -6.20E+00 5.402+00 1.90E+01 ST] L3396-01 30 Sb-124 -1.60E+00 1.60E+00 5.80E+00 STJ L3396-01 30 Sb- 125 8.00E-01 1.50E+00 4.90E+00 STJ L3396-01 30 Se-75 5.50E-01 7.70E-01 2.60E+00 -

STJ L3396-01 30 Zn-65 1.60E+00 1.80E+00 6.00E+00 STJ L3396-01 30 Zr-95 9.OOE-01 1.10E+00 3.802+00 LTW L3396-02 30 AcTh-228 -1.00-01 3.90E+00 1.30E+01 LTW L3396-02 30 Ag-108m 5.80E-01 6.60E-01 2.20E+00 LTW L3396-02 30 Ag-110m -2.OOE-01 1.1OE+00 4.00E+00 LTW L3396-02 30 Ba-140 7.90E+00 3.70E+00 1.20E+01 LTW L3396-02 30 Be-7 -4.90E+00 8.00E+00 2.80E+01 LTW L3396-02 30 Ce-141 -3.60E+00 2.70E+00 9.30E+00 LTW L3396-02 30 Ce-144 -2.30E+00 4.50E+00 1.50E+01 LTW L3396-02 30 Co-57 O.OOE+00 5.80E-01 2.00E+00 LTW L3396-02 30 Co-58 4.50E-01 9.20E-01 3.10E+00 LTW 12396-02 30 Co-60 -1.32E+00. 9.10E-01 3.30E+00 LTW L3396-02 30 Cr-51 -7.OOE+00 1.20E+01 4.10E+01 LTW L3396-02 30 Cs-134 -1.49E+00 7.90E-01 2.90E+00 LTW L3396-02 30 Cs- 137 7.70E-01 8.70E-01 2.902+00 LTW L3396-02 30 Fe-59 1.40E+00 2.90E+00 1.00E+01 LTW L3396-02 30 GROSS BETA 5.38E+00 8.70E-01 2.20E+00 LTW L3396-02 30 1-131 6.30E-01 3.40E-0O 9.50E-01 LTW L3396-02 30 K-40 7.00E+00 1.30E+01 4.50E+01 LTW L3396-02 30 La- 140 9.10E+00 4.30E+00 1.40E+01 LTW L3396-02 30 Mn-54 -1.48E+00 8.20E-01 3.00E+OO LTW L3396-02 30 Nb-95 4.50E+00 1.80E+00 5.90E+00 LTW L3396-02 30 Ru-103 1.OOE+00 1.IOE+00 3.80E+00 LTW L3396-02 30 Ru-106 1.05E+01 7.90E+00 2.60E+01 LTW L3396-02 30 Sb- 124 -2.40E+00 2.20E+00 8.20E+00 LTW L3396-02 30 Sb-125 -2.90E+00 2.00E+00 7.10E+00 LTW L3396-02 30 Se-75 7.00E-0O 1.1OE+00 3.70E+00 LTW L3396-02 30 Zn-65 7.30E+00 3.40E+00 1.l10+01 LTW L3396-02 30 Zr-95 2.00E-01 1.60E+00 5.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-170

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L3519-01 32 AcTh-228 I.IOE+00 2.10E+00 9.OOE+00 STJ L3519-01 32 Ag-108m 8.10E-01 4.30E-01 1.40E+00 STJ L3519-01 32 Ag-11 Om 3.OOE-02 7.50E-01 2.50E+00 STJ L3519-01 32 Ba-140 -3.90E+00 3.60E+00 1.30E+01 STJ L3519-01 32 Be-7 I.OOE+O1 5.90E+00 1.90E+01 STJ L3519-01 32 Ce-141 8.OOE-01 2.00E+00 6.50E+00 STJ L3519-01 32 Ce-144 1.20E+00 3.10E+00 L.OOE+O1 STJ L3519-01 32 Co-57 -7.OOE-02 4.OOE-01 1.30E+O0 STJ L3519-01 32 Co-58 2.50E-01 6.70E-01 2.30E+O0 STJ L3519-01 32 Co-60 -1.08E+00 5.50E-01 2.OOE+00 STJ L3519-01 32 Cr-51 2.50E+00 9.70E+00 3.30E+I0 STJ L3519-01 32 Cs-134 2.30E-01 5.70E-01 1.90E+00 STJ L3519-01 32 Cs-137 -1.93E+00 5.30E-0I 1.90E+00 STJ L3519-01 32 Fe-59 6.OOE-01 2.20E+00 7.50E+0O STJ L3519-01 32 GROSS BETA 3.58E+00 9.70E-01 2.70E+00 STJ L3519-01 32 1-131 6.OOE-01 4.50E-01 1.50E+00 STJ L3519-01 32 K-40 1.73E+01 9.20E+00 3.0OE+0O STJ L3519-01 32 La-140 -4.50E+00 4.10E+00 1.50E+0O STJ L3519-01 32 Mn-54 2.OOE-02 5.50E-OI 1.90E+00 STJ L3519-01 32 Nb-95 -1.OOE-O1 1.1OE+00 3.90E+00 STJ U3519-01 32 Ru-103 -1.32E+00 8.50E-01 2.90E+00 STJ L35i9-01 32 Ru-106 -3.30E+00 5.OOE+00 1.70E+01 STJ L3519-01 32 Sb-124 -2.40E+00 1.80E+00 6.50E+00 STJ U3519-01 32 Sb-125 1.90E+00 1.30E+00 4.40E+00 STJ U3519-01 32 Se-75 -1.20E+00 7.50E-01 2.60E+00 STJ L3519-01 32 Zn-65 6.60E+00 2.30E+00 7.50E+00 STJ U3519-01 32 Zr-95 I.IOE+O0 1.IOE+O0 3.80E+00 LTW U3519-02 32 AcTh-228 -3.80E+00 3.OOE+O0 l.OOE+01 LTW U3519-02 32 Ag-108m 8.OOE-02 3.80E-01 1.30E+00 LTW L3519-02 32 Ag-1 10m -9.40E-01 6.30E-01 2.20E+0O LTW 12519-02 32 Ba-140 6.90E+00 3.30E+00 l.lOE+01 LTW L3519-02 32 Be-7 1.90E+00 5.30E+00 1.80E+0O LTW U3519-02 32 Ce-141 -6.OOE-01 1.20E+00 3.90E+00 LTW L3519-02 32 Ce-144 -2.20E+00 2.50E+00 8.60E+00 LTW L3519-02 32 Co-57 1.50E-01 6.OOE-01 2.OOE+00 LTW L3519-02 32 Co-58 -1.63E+00 5.80E-01 2.10E+00 LTW L3519-02 32 Co-60 -9.OOE-01 4.70E-01 1.70E+00 LTW L3519-02 32 Cr-51 7.20E+00 8.40E+00 2.80E+0O

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-171

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L3519-02 32 Cs-134 7.OOE-01 4.80E-01 1.60E+00 LTW L3519-02 32 Cs-137 -2.80E-0O 4.90E-01 1.70E+00 LTW L3519-02 32 Fe-59 4.00E-01 2.00E+00 6.90E+00 LTW L3519-02 32 GROSS BETA 3.OOE+00 1.00E+00 2.90E+00 LTW L3519-02 32 1-131 2.50E-01 4.OOE-01 1.60E+00 LTW L3519-02 32 K-40 -6.OOE+00 l.l1OE+01 3.70E+01 LTW L3519-02 32 La-140 8.OOE+00 3.70E+00 1.20E+01 LTW L3519-02 32 Mn-54 4.00E-02 4.50E-01 1.502+00 LTW L3519-02 32 Nb-95 1.60E+00 1.30E+00 4.40E+00 LTW L3519-02 32 Ru-103 -3.04E+00 7.70E-01 2.80E+00 LTW L3519-02 32 Ru-106 4.90E+00 4.60E+00 1.50E+01 LTW L3519-02 32 Sb-124 -2.30E+00 1.501E+00 5.30E+00 LTW L3519-02 32 Sb- 125 -1.OOE+00 1.20E+00 4.00E+00 LTW L3519-02 32 Se-75 7.50E-01 5.60E-01 1.90E+00 LTW L3519-02 32 Zn-65 -1.OOE+00 1.40E+00 4.80E+00 LTW L3519-02 32 Zr-95 1.lOE+00 1.10E+00 3.60E+00 STJ L3637-01 34 AcTh-228 -7.10E+00 4.60E+00 1.70E+0O STJ L3637-01 34 Ag-108m 2.21E+00 8.30E-01 2.60E+00 STJ L3637-01 34 Ag-i lim -1.00E+00 1.40E+00 5.00E+00 STJ L3637-01 34 Ba-140 l .OOE-0l 2.10E+00 7.80E+00 STJ L3637-01 34 Be-7 2.20E+00 9.OOE+00 3.10E+01 STJ L3637-01 34 Ce-141 -4.101E+00 2.OOE+00 7.00E+00 STJ L3637-01 34 Ce-144 8.70E+00 5.60E+00 1.80E+01 STJ L3637-01 34 Co-57 1.lOE-01 8.80E-01 3.00E+00 STJ L3637-01 34 Co-58 -1.04E+00 9.10E-01 3.50E+00 STJ L3637-01 34 Co-60 1.30E+00 1.lOE+00 3.50E+00 STJ L3637-01 34 Cr-51 l.OOE+00 1.lOE+01 3.80E+01 STJ L3637-01 34 Cs-134 -I.OOE-01 1.00E+00 3.70E+00 STJ L3637-01 34 Cs-137 -4.OOE-0O 1.10E+00 4.00E+00 STJ. L3637-01 34 Fe-59 l.OOE-0O 3.30E+00 1.20E+01 STJ L3637-01 34 GROSS BETA 5.1OE+00 1.10+00 3.00+E+0 STJ L3637-01 34 1-131 -3.00E-02 1.70E-01 1.00E+00 STJ L3637-01 34 K-40 I.OOE+00 1.60E+01 5.702+01 STJ L3637-01 34 La-140 2.00E-01 2.40E+00 9.00E+00 STJ L3637-01 34 Mn-54 2.OOE-01 l.OOE+00 3.502+00 STJ L3637-01 34 Nb-95 -1.20E+00 1.30E+00 4.90E+00 STJ 12637-01 34 Ru-103 O.OOE+00 1.20E+00 4. 1OE+00 STJ L3637-01 34 Ru-106 -2.73E+01 9.90E+00 3.80E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-172

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ U3637-01 34 Sb-124 4.701E+00 2.80E+00 9.OOE+00 STJ U3637-01 34 Sb-125 1.20E+00 2.70E+00 9.20E+00 STJ 1U637-01 34 Se-75 1.30E+00 1.20E+00 3.90E+O0 STJ U3637-01 34 Zn-65 1.13E+0lI 4.30E+00 1.40E+01 STJ U3637-01 34 Zr-95 I1.30E+00 1.80E+00 6.20E+00 LTW U3637-02 34 AcTh-228 -7.80E+00 4.30E+00 1.60E+01 LTW U3637-02 34 Ag-108m -7.OOE-02 9.OOE-01 3.20E+00 LTW 12637-02 34 Ag-110m -1 .20E+00 1.50E+00 5.70E+00 LTW U3637-02 34 Ba-140 7.00OE-01 2.50E+00 9.10E+00 LTW L3637-02 34 Be-7 -8.501E+00 9.20E+00 3.40E+0O LTW U3637-02 34 Ce-141 3.OOE-01 1.80E+00 6.30E+00 LTW L3637-02 34 Ce-144 -2.80E+00 6.30E+00 2.20E+0O LTW 12637-02 34 Co-57 -4.70E-01 8.20E-01 2.80E+00 LTW L3637-02 34 Co-58 0.OOE+00 l.OOE+00 3.70E+00 LTW L3637-02 34 Co-60 1.40E+00 1.IOE+00 3.70E+00 LTW L3637-02 34 Cr-51 -2.001E+00 1.20E+01 4.30E+0O LTW L3637-02 34 Cs-134 1.60E+00 1. 1OE+00 3.70E+00 LTW L3637-02 34 Cs-137 -1 .40E+00 1.20E+00 4.50E+00 LTW L3637-02 34 Fe-59 -3.201E+00 3.40E+00 1.30E+01 LTW L3637-02 34 GROSS BETA 2.71E+00 9.90E-01 3.OOE+00 LTW L3637-02 34 1-131 4.001E-02 2.10E-01 1.20E+00 LTW L3637-02 34 K-40 -2.201E+01 1.50E+01 5.50E+01 LTW L3637-02 34 La-140 8.00OE-01 2.90E+00 I.OOE+01 LTW L3637-02 34 Mn-54 5.00OE-01 l.1OE+00 3.80E+00 LTW L3637-02 34 Nb-95 -2.30E-i00 1.60E+00 5.90E+00 LTW L3637-02 34 Ru-103 4.OOE-01 1.30E+00 4.50E+00 LTW L3637-02 34 Ru-106 -1.80E+01 l.1OE+01 4.1OE+OI LTW L3637-02 34 Sb-124 -2. 10E+00 3.10E+00 1.20E+0O LTW L3637-02 34 Sb-12S 4.80E+00 2.90E+00 9.50E+00 LTW L3637-02 34 Se-75 3.OOE-01 1.40E+00 4.90E+00 LTW L3637-02 34 Zn-65 0.OOE+00 3.OOE+00 I.IOE+OI LTW L3637-02 34 Zr-95 -5.OOE-01 l.90E+00 6.90E+00 STJ L3733-01 36 AcTb-228 -1.OOE-01 3.60E+00 1.30E+01 STJ L3733-01 36 Ag-108m -9.00E-02 7.60E-01 2.60E+00 STJ L3733-01 36 Ag-11 Om 1.30E+00 1.30E+00 4.30E+00 STJ L3733-01 36 Ba-140 8.OOE-01 l.90E+00 6.80E+00 STJ L3733-01 36 Be-7 0.OOE3+00 7.90E+00 2.70E+0O STJ 12733-01 36 Ce-141 2.70E+00 2.00E+00 6.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-173

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L3733-01 36 Ce-144 3.20E+00 5.40E+00 1.80E+01 STJ L3733-01 36 Co-57 4.70E-01 6.90E-01 2.30E+00 STJ L3733-01 36 Co-58 -2.30E+00 1.00E+00 3.80E+00 STJ L3733-01 36 Co-60 -9.00E-02 9.70E-01 3.40E+00 STJ L3733-01 36 Cr-51 -4.60E+00 9.90E+00 3.40E+0O STJ L3733-01 36 Cs-134 1.00E-01 1.00E+00 3.50E+00 STJ L3733-01 36 Cs-137 -1.12E+00 9.40E-01 3.40E+00 STJ L3733-01 36 Fe-59 1.OOE-01 2.50E+00 8.80E+00 STJ L3733-01 36 GROSS BETA 2.30E+00 1.OOE+00 3.10E+00 STJ L3733-01 36 1-131 3.60E-01 2.90E-01 1.00E+00 STJ L3733-01 36 K-40 1.00E+0 1.50E+01 5.20E+01 STJ L3733-01 36 La-140 I.OOE+00 2.20E+00 7.80E+00 STJ L3733-01 36 Mn-54 4.60E-01 9.50E-01 3.30E+00 STJ L3733-01 36 Nb-95 -2.30E+00 1.80E+00 6.50E+00 STJ L3733-01 36 Ru-103 7.00E-01 1.IOE+00 3.60E+00 STJ L3733-01 36 Ru-106 -8.OOE+00 8.90E+00 3.10E+01 STJ L3733-01 36 Sb-124 -5.00E-01 2.50E+00 9.OOE+00 STJ L3733-01 36 Sb-125 1.30E+00 2.40E+00 8.10E+00 STJ L3733-01 36 Se-75 5.OOE-01 1.20E+00 4.20E+00 STJ L3733-01 36 Zn-65 5.80E+00 3.90E+00 1.30E+01 STJ 12733-01 36 Zr-95 -2.OOE+00 1.60E+00 6.00E+00 LTW L3733-02 36 AcTh-228 1.08E+01 5.20E+00 1.70E+01 LTW 12733-02 36 Ag-108m -7.00E-01 1.00E+00 3.60E+00 LTW L3733-02 36 Ag- 10m -5.00E-01 1.80E+00 6.30E+00 LTW L3733-02 36 Ba-140 -5.40E+00 2.80E+00 1.20E+01 LTW 12733-02 36 Be-7 -3.30E+00 9.80E+00 3.50E+0I LTW L3733-02 36 Ce-141 -4.60E+00 3.00E+00 1.1OE+01 LTW L3733-02 36 Ce-144 1.50E+00 6.10E+00 2.10E+01 LTW 12733-02 36 Co-57 6.30E-01 7.70E-01 2.60E+00 LTW 12733-02 36 Co-58 -2.00E+00 1.30E+00 4.90E+00 LTW 12733-02 36 Co-60 2.10E+00 1.50E+00 4.80E+00 LTW L3733-02 36 Cr-51 -1.00+00 1.30E+01 4.40E+01 LTW L3733-02 36 Cs-134 -1.40E+00 1.30E+00 4.90E+00 LTW 12733-02 36 Cs-137 3.00E-01 1.30E+00 4.50E+00 LTW L3733-02 36 Fe-59 1.40E+00 4.00E+00 1.40E+01 LTW U3733-02 36 GROSS BETA 3.60E+00 1.10E+00 3.00E+00 LTW U3733-02 36 1-131 -3.00E-01 1.30E-01 1.00E+00 LTW 12733-02 36 K-40 -1.70E+01 2.00E+01 7.20E+01 LTW 12733-02 36 La-140 -6.20E+00 3.20E+00 1.30E+01 LTW L3733-02 36 Mn-54 -1.40E+00 1.30E+00 4.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-174

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Sumnmary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW U3733-02 36 Nb-95 -9.OOE-01 1.40E+00 5.OOE+00 LTW U3733-02 36 Ru-103 -2.90E+00 1.30E+00 4.80E+00 LTW U3733-02 36 Ru-106 1.90E+01 1.20E+01 4.OOE+01 LTW U3733-02 36 Sb-124 -2.60E+00 3.50E+00 1.40E+01 LTW U3733-02 36 Sb-125 -9.OOE-01 3.30E+00 I. lO+01 LTW U3733-02 36 Se-75 6.OOE-01 I1.50E+00 5.OOE+00 LTW U3733-02 36 Zn-65 -9.OOE-01 5.OOE+00 1.80E+01 LTW U3733-02 36 Zr-95 2.70E+00 2.10oE+00 7.101E+00 ST1 U3864-01 37 AcTh-228 6.OOE+00 2.90E+00 1.30E+01 STJ U3864-01 37 Ag- 108m 6.20E-01 6.60E-01 2.20E+00 STJ U3864-01 37 Ag-110m *IOE+00 I1.30E+00 4.20E+00 STJ U3864-01 37 Ba-140 3.OOE+00 2.90E+00 9.90E+00 STJ U864-01 37 Be-7 8.60E+00 8.50E+00 2.80E+01 STJ U3864-01 37 Ce-141 2.OOE-01 1.90E-.00 6.30E+00 STJ U3864-01 37 Ce-144 3.70E+00 5.20E+00 1 .70E+01 STJ U3864-01 37 Co-57 9. 1O-01 6.70E-01 2.20E+00 STJ 12864-01 37 Co-58 5.OOE-02 9.40E-01 3.20E+00 STJ U3864-01 37 Co-60 8.OOE-01 7.90E-01 2.70E+00 STJ U3864-01 37 Cr-51 -1.1E+01 l.IOE-s01 3.70E+01 STJ U3864-01 37 Cs-134 I1.40E+00 1.90E+00 6.30E+00 STJ U3864-01 37 Cs-137 -1.95E+00 8.40E-01 3.OOE+00 STJ L3864-01 37 Fe-59 2.80E+00 2.OOE+00 6.50E+00 STJ L3864-01 37 GROSS BETA 5.80E+00 I1.20E+00 300OE+00 STJ L3864-01 37 1-131 2.70E-01 2.60E-01 9.50E-01 STJ L3864-01 37 K-40 -8.OOE+00 1.40E+01 4.80E+01 STJ L3864-01 37 La-140 3.40E+00 3.40E+00 I. IOE+01 STJ L3864-01 37 Mn-54 -7.90E-01 8.70E-01 3. 1OE+00 STJ L3864-01 37 Nb-95 3.901E+00 I1.60E+00 5.10E+00 STJ L3864-01 37 Ru-103 -6.OOE-01 1.IOE+00 3.80E+00 STJ U3864-01 37 Ru-106 -3.70E+00 7.40E+00 2.60E-i01 STJ L3864-01 37 Sb-124 -2. l OE+00 2.40E+00 8.80E+60 STJ L3864-01 37 Sb-125 2.40E+O0 2.OOE+00 6.80E+00 STJ U3864-01 37 Se-75 -I. lOE+00 LIO0E+00 3.90E+00 STJ U3864-01 37 Zn-65 -8.OOE-01 1.60E+00 5.70E+00 STJ U3864-01 37 Zr-95 -8.OOE-01 1.60E+00 5.70E+00 LTW 12864-02 37 AcTh-228 2.30E+00 4.OOE+00 1.40E+0 I LTW 12864-02 37 Ag-108m -6.OOE-01 7.40E-01 2.60E+00 LTW L3864-02 37 Ag-I 10m -1.80E+00 1.50E+00 5.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-175

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L3864-02 37 Ba-140 -4.00E-0O 3.40E+00 1.20E+01 LTW L3864-02 37 Be-7 -9.1OE+00 9.20E+00 3.20E+01 LTW L3864-02 37 Ce-141 -4.90E+00 2.70E+00 9.20E+00 LTW L3864-02 37 Ce-144 -2.30E+00 4.90E+00 1.70E+01 LTW L3864-02 37 Co-57 -1.80E-0O 6.20E-0O 2.10E+00 LTW L3864-02 37 Co-58 7.00E-01 l.lOE+00 3.60E+00 LTW L3864-02 -37 Co-60 1.30E1+OO 1. lOE+00 3.50E+00 LTW L3864-02 37 Cr-51 -4.OOE+00 1.20E+0O 4.10E+01 LTW L3864-02 37 Cs-134 -1.IOE+00 l.lOE+00 4.10E+00 LTW L3864-02 37 Cs-137 -6.90E-0O 9.60E-0O 3.40E+00 LTW L3864-02 37 Fe-59 -1.80E+00 2.40E+00 8.70E+00 LTW L3864-02 37 GROSS BETA 5.OOE+00 -1.20E+00 3.1OE+00 LTW L3864-02 37 1-131 -2.09E-0I 3.60E-02 9.40E-0O LTW L3864-02 37 K-40 -2.00E+00 1.70E+0O 5.80E+01 LTW L3864-02 37 La-140 -4.OOE-01 3.90E+0O 1.40E+I01 LTW L3864-02 37 Mn-54 -2.90E-0O 9.80E-0I 3.50E+00 LTW L3864-02 37 Nb-95 -1.30E+00 1.30E+00 4.60E+00 LTW L3864-02 37 Ru-103 -I.OOE-0O 1.20E3+00 4.20E+00 LTW L3864-02 37 Ru-106 -1.20E+0O 8.80E+00 3.10E+01 LTW L3864-02 37 Sb-124 -2.10E+00 2.90E+00 l.10E+01 LTW L3864-02 37 Sb- 125 -2.50E+00 2.40E+00 8.30E+00 LTW L3864-02 37 Se-75 0.OOE+00 1.20E+00 3.90E+00 LTW L3864-02 37 Zn-65 3.60E+00 3. 10E+00 l.OOE+0O LTW L3864-02 37 Zr-95 -I.IOE+00 1.90E+00 6.80E+00 STJ L3970-01 40 AcTh-228 9.OOE+00 5.60E+00 1.80E3+01 STJ L3970-01 40 Ag-108m -5.00E-0O l.lOE+00 4. 1OE+00 STJ L3970-01 40 Ag-I lOm -1.70E+00 1.60E+00 6.60E+00 STJ 12970-01 40 Ba-140 2.40E+00 3.101E+00 1.lOE+01 STJ 12970-01 40 Be-7 l.lOE+0I 1.30E+0O 4.50E+0I STJ 12970-01 40 Cc-141 7.00E-0O 3.20E+00 l.lOE+0I STJ 12970-01 40 Ce-144 -9.OOE+OO l.lOE+01 3.90E+01 STJ 12970-01 40 Co-57 2.00E+00 1.40E+00 4.50E+00 STJ L3970-01 40 Co-58 -1.0E1+-00 1.30E+00 5.00E+00 STJ L3970-01 40 Co-60 l.OOE-0O 1.20E+00 4.60E+00 STJ L3970-01 40 Cr-51 2.OOE+00 1.60E+0O 5.50E+0O STJ W3970-01 40 Cs-134 I.IOE+00 1.30E+00 4.60E+00 STJ L3970-01 40 Cs-137 -3.00E+00 1.20E+00 5.30E+00 STJ 12970-01 40 Fe-59 -1.50E+00 3.60E+00 1.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-176

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L3970-01 40 GROSS BETA 3.50E+00 I.IOE+00 3.10E+00 STJ L3970-01 40 1-131 -I.OOE-0I 1.60E-01 9.10E-0O STJ L3970-01 40 K-40 -2.50E+0O 1.50E+OI 6.50E+01 STJ L3970-oi 40 La-140 2.70E+00 3.60E+00 1.30E+01 STJ L3970-01 40 Mn-54 1.20E+00 1.30E+00 4.70E+00 STJ L3970-01 40 Nb-95 3.10E+00 1.90E+00 6.30E+00 STJ L3970-01 40 Ru-103 -1.80E+00 1.70E+00 6.30E+00 STJ L3970-01 40 Ru-106 1.30E+0O 1.30E+0O 4.40E+01 STJ L3970-01 40 Sb-124 .lOE+00 3.1OE+00 1.20E+0O STJ L3970-01 40 Sb-125 4.OOE-01 3.50E+00 1.30E+0l STJ L3970-01 40 Se-75 -4.20E+00 2.OOE+00 7.40E+00 STJ L3970-01 40 Zn-65 5.OOE+00 4.80E+00 1.60E+0l STJ L3970-01 40 Zr-95 -7.OOE-0O 2.20E+00 8.50E+00 LTW L3970-02 40 AcTh-228 1.20E+00 6.60E+00 2.40E+0O LTW L3970-02 40 Ag-108m -9.OOE-0O 1.30E+00 5.OOE+OO LTW L3970-02 40 Ag-lOmn -4.30E+00 2.10E+00 9.OOE+00 LTW L3970-02 40 Ba-140 -4.OOE-01 2.60E+00 1.1OE+01 LTW L3970-02 40 Be-7 -2.OOE+0O 1.60E+0O 6.10E+0l LTW L3970-02 40 Ce-141 4.80E+00 3.80E+00 1.30E+0O LTW L3970-02 40 Ce-144 1.60E+01 1.30E+0O 4.40E+0O LTW L3970-02 40 Co-57 1.60E+00 1.70E+00 5.60E+00 LTW L3970-02 40 Co-58 -3.30E+00 1.60E+00 6.60E+00 LTW L3970-02 40 Co-60 1.40E+00 1.70E+00 5.90E+00 LTW L3970-02 40 Cr-SI 9.OOE+00 l.90E+01 6.60E+0O LTW L3970-02 40 Cs-134 -2.20E+00 l.90E+00 7.30E+00 LTW L3970-02 40 Cs-137 -1.60E+00 1.50E+00 6.OOE+00 LTW L3970-02 40 Fe-59 -3.60E+00 3.90E+00 1.70E+01 LTW L3970-02 40 GROSS BETA 2.OOE+00 9.70E-0O 3.OOE+00 LTW L3970-02 40 1-131 -5.OOE-02 1.70E-0O 9.30E-0O LTW L3970-02 40 K-40 -1.80E+0l 1.80E+0O 7.20E+01 LTW L3970-02 40 La-140 -5.OOE-0O 3.OOE+00 1.20E+01 LTW L3970-02 40 Mn-54 1.OOE+00 1.80E+00 6.30E+00 LTW L3970-02 40 Nb-95 2.20E+00 2.30E+00 7.80E+00 LTW L3970-02 40 Ru-103 -1.90E+00 1.70E+00 6.SOE+00 LTW L3970-02 40 Ru-106 -6.OOE+00 1.40E+0O 5.20E+01 LTW L3970-02 40 Sb-124 6.90E+00 4.60E+00 1.50E+01 LTW L3970-02 40 Sb-125 9.OOE-01 3.80E+00 1.40E+0I LTW L3970-02 40 Se-75 -1.80E+00 2.60E+00 9.10E+00 LTW L3970-02 40 Zn-65 7.70E+00 6.70E+00 2.30E+0l LTw L3970-02 40 Zr-95 -3.1OE+00 2.70E+00 1.1OE+0l

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-177

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L4120-01 41 AcTh-228 -4.50E+00 4.80E+00 1.90E+01 STJ L4120-01 41 Ag-108m 2.00E-01 1.10E+00 4.10E+00 STJ L4120-01 41 Ag-110m 5.00E-01 1.80E+00 6.60E+00 STJ L4120-01 41 Ba-140 -4.40E+00 2.80E+00 1.20E+01 STJ LA120-01 41 Be-7 1.30E+OI 1.lOE+0I 3.70E+0O STI L4120-01 41 Ce-141 -3. 10E+00 2.90E+00 1.OOE+01 STJ L4120-01 41 Ce-144 3.OOE+00 1.OOE+01 3.40E+01 STJ L4120-01 41 Co-57 -9.OOE-01 1.20E+00 4.30E+00 STJ L4120-01 41 Co-58 -2.10E+00 1.lOE+00 4.80E+00 STJ L4120-01 41 Co-60 -1.89E+00 9.70E-01 4.70E+00 STJ L4120-01 41 Cr-51 -1.80E+01 1.40E+01 5.30E+01 STJ L4120-01 41 Cs-134 -1.90O+00 1.30E+00 5.50E+00 STJ L4120-01 41 Cs-137 -1.80E+00 1.30E+00 5.30E+00 STJ L4120-0i 41 Fe-59 1.80E+00 2.80E+00 I.OOE+01 STJ L4120-01 41 GROSS BETA -3. 1OE-0I 8.50E-01 3.10E+00 STJ L4120-01 41 1-131 1.70E-01 2.70E-01 9.70E-OI STJ L4120-01 41 K-40 -1.50E+01 1.50E+01 6.20E+01 STJ L4120-01 41 La-140 -5.10E+00 3.20E+00 1.40E+01 STJ LA120-01 41 Mn-54 -1.60E+00 1.20E+00 4.90E+00 STJ L4120-01 41 Nb-95 2.10E+00 1.40E+00 4.70E+00 STJ L4120-01 41 Ru-103 -3.80E+00 1.60E+00 6.30E+00 STJ L4120-01 41 Ru-106 -4.70E+00 9.90E+00 3.80E+01 STJ L4120-01 41 Sb-124 -5.50E+00 3.10E+00 1.40E+OI STJ LA120-01 41 Sb-125 -1.30E+00 3.50E+00 1.30E+I01 STJ L4120-01 41 Se-75 7.OOE-01 1.80E+00 6.10E+00 STJ UA120-01 41 Zn-65 -4. 10E+00 2.80E-+00 1.20E+01 STJ LA120-01 41 Zr-95 1.501E+00 2.20E+00 7.80E+00 LTW LA120-02 41 AcTh-228 3.00E-01 4.30E+00 1.60E+01 LTW LA120-02 41 Ag-108m -3.40E-01 9.60E-01 3.50E+00 J LTW LA120-02 41 Ag-110m -1.70E+00 1.402+00 5.602+00 LTW LA120-02 41 Ba- 140 O.OOE+00 2.30E+00 9.00E+00 LTW LA120-02 41 Be-7 8.00E+00 1.OOE+01 3.50E+0I LTW LA120-02 41 Ce-141 -2.20E+00 2.502+00 8.90E+00 LTW LA1 20-02 41 Ce-144 -6.00E+00 8.00E+00 2.80E+0O LTW LA1 20-02 41 Co-57 -1 .OOE+00 1.002+00 3.70E+00 LTW LA120-02 41 Co-58 -1.60E+00 1.IOE+00 4.40E+00 LTW L4120-02 41 Co -1.46E+00 9.20E-01 4.10E+00 LTW L4120-02 41 Cr-51 2.00E+00 1.30E+01 4.60E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-178

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L4120-02 41 Cs-134 7.OOE-01 1.30E+00 4.501E+00 LTW L4120-02 41 Cs-137 6.00E-01 1.20E+00 4. 10E+00 LTW L4120-02 41 Fe-59 -2.OOE-01 2.90E+00 1.1OE+01 LTW L4120-02 41 GROSS BETA 2.49E+00 9.90E-01 3.10E+00 LTW L4120-02 41 1-131 2.40E-01 2.60E-01 9.10E-01 LTW L4120-02 41 K-40 Q.OOE+00 1.50E+01 5.50E+01 LTW L4120-02 41 La-140 O.OOE+00 2.70E+00 1.OOE1+01 LTW LU120-02 41 Mn-54 3.OOE-01 1.IOE+00 3.90E+00 LTW L4120-02 41 Nb-95 -1.60E+00 1.30E+00 5.30E+00 LTW L4120-02 41 Ru-103 -1.OOE+00 1.30E+00 5.OOE+00 LTW LU120-02 41 Ru-106 -1.OOE+01 1.OOE+01 3.90E+01 LTW L4120-02 41 Sb-124 -1 .20E+00 2.90E4-00 1.201E+01 LTW L4120-02 41 Sb-125 -3.10E+00 2.90E+00 I. IOE+01 LTW LA120-02 41 Se-75 -3.10E+00 1.60E+00 6.10OE+00 LTW LA120-02 41 Zn-65 7.60E+00 4.701E+00 1.60E+01 LTW L4120-02 41 Zr-95 -1.OOE-01 1.90E+00 7.10OE+00 STJ L4228-01 43 AcTh-228 -9.OOE-01 3.80E+00 1.40E+01 STJ U4228-01 43 Ag-108m 1.80E-01 8.30E-01 2.90E+00 STJ U4228-01 43 Ag-l lOm -1.OOE-01 1.20E+00 4.601E+00 STJ LA228-01 43 Ba-140 -3.60E+00 2.40E+00 1.OOE+01 STJ UA228-01 43 Be-7 -5.30E+00 9.60E+00 3.50E+01 STJ LA228-01 43 Ce-141 1.40E+00 2. 10E+00 7.OOE+00 STJ 1A228-01 43 Ce-144 3.OOE+00 6.60E4-00 2.30E+01 STJ LA228-01 43 Co-57 1.OOE-01 8.601E-01 3.OOE+00 STJ UA228-01 43 Co-58 -1 .56E+00 9.20E-01 3.80E+00 STJ L4228-01 43 Co-60 -9.70E-01 9.70E-01 3.90E+00 STJ L4228-01 43 Cr-51 9.OOE+00 1.10E+01 3.80E+01 STJ LA228-01 43 Cs-134 -2.60E-0I 9.40E3-01 3.50E+00 STJ UA228-01 43 Cs-137 -1 .34E+00 9.70E-01 3.80E+00 STJ LA228-01 43 Fe-59 -7.OOE-OI 2.40E+00 8.90E+00 STJ 14228-01 43 GROSS BETA 2.80E+00 I.OOE+00 3.OOE+00 STJ UA228-01 43 1-131 5.10E-OI 3.30E-01 9.40E-01 STJ UA228-01 43 K-40 -1.90E+01 1.30E+01 5. 10E+01 STJ LA228-01 43 La-140 -4. 1OE+00 2.80E+O0 1.20E+01 STJ LA228-01 43 Mn-54 -5.OOE-0I 8.30E-01 3.2013-00 STJ UA228-01 43 Nb-95 -4.OOE-01 I1.30E+00 4.80E+00 STJ LA228-01 43 Ru-103 -2.90E+00 I1.30E+00 5.OOE+00 STJ LA228-01 43 Ru-106 -1 .99E+01 9.50E+00 3.80E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-179

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L4228-01 43 Sb-124 0.OOE+00 2.80E+00 1. IOE+0O STJ L4228-01 43 Sb-125 0.00+00 2.70E+00 9.50E+00 STJ L4228-01 43 Se-75 -7.00E-01 1.10E+00 4.10E+00 STJ L4228-01 43 Zn-65 l.OOE+00 2.90E+00 l .00+01 STJ L4228-01 43 Zr-95 -3.00E-01 1.80E+00 6.80E+00 LTW L4228-02 43 AcTh-228 -5.20E+00 4.50E+00 1.80E+0O LTW L4228-02 43 Ag-108m 4.80E-01 9.10E-01 3.20E+00 LTW L4228-02 43 Ag- lOnm -7.00E-01 1.50E+00 5.70E+00 LTW L4228-02 43 Ba-140 6.00E-01 3.40E+O0 1.30E+01 LTW L4228-02 43 Be-? -5.70E+00 9.90E3+00 3.70E+01 LTW L4228-02 43 Ce-141 2.40E+00 2.10E+00 7.00E+00 LTW L4228-02 43 Ce-144 3.70E+00 6.70E+00 2.30E+01 LTW L4228-02 43 Co-57 5.50E-0O 8.10E-0O 2.70E+00 LTW L4228-02 43 Co-58 -1.30E+00 1.1 OE+0O 4.40E+00 LTW L4228-02 43 Co-60 2.40E+00 l.00E+00 3.20E+00 LTW L4228-02 43 Cr-51 1.60E+0O 1.40E+01 4.60E+01 LTW L4228-02 43 Cs-134 l.OOE+00 1.1OE+00 3.90E+00 LTW LA228-02 43 Cs-137 -I .OOE-0O 1.20E+00 4.30E+00 LTW L4228-02 43 Fe-59 3.00E+00 2.40E+00 8.20E+00 LTW L4228-02 43 GROSS BETA 1.84E+00 9.20E-01 2.90E+00 LTW L4228-02 43 1-131 3.50E-01 2.80E-01 9.40E-O1 LTW L4228-02 43 K-40 1.50E+01 1.40E+01 4.60E+01 LTW L4228-02 43 La-140 7.00E-OI 3.90E+00 1.40E+01 LTW L4228-02 43 Mn-54 -9.00E-01 1.lE+00 4.10E+00 LTW L4228-02 43 Nb-95 -8.00E-0O 1.50E+00 5.70E+00 LTW L4228-02 43 Ru-103 -2.OOE+00 1.40E+00 5.30E+00 LTW L4228-02 43 Ru-106 -1.85E+O1 9.70E+00 3.90E+01 LTW L4228-02 43 Sb-124 3.30E+00 2.90E+00 9.90E+00 LTW L4228-02 43 Sb-125 3.50E+00 2.80E+00 9.50E+00 LTW L4228-02 43 Se-75 -2.00E-01 1.50E+00 5.20E+00 LTW L4228-02 43 Zn-65 -5.80E+00 2.70E+00 1.10E+01 LTW L4228-02 43 Zr-95 -2.50E+00 1.90E+00 7.70E+00 STJ L4315-01 45 AcTh-228 -4.60E+00 4.90E+00 1.80E+01 STJ L4315-01 45 Ag-108m -7.00E-02 9.20E-01 3.20E+00 STJ L4315-01 45 Ag-I lOIm -2.00E-01 1.60E+00 5.70E+00 STJ L4315-01 45 Ba- 140 4.70E+O0 2.70E+00 8.60E+00 STJ L4315-01 45 Be-7 2.00E+00 1.00+01 3.50E+01 STJ L4315-01 45 Ce-141 -1.80E+O0 1.90E+00 6.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-180

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L4315-01 45 Ce-144 6.40E+00 5.70E+00 1.90E+0O STJ L4315-01 45 Co-57 5.OOE-01 7.60E-01 2.50E+00 STJ L4315-01 45 Co-58 -1.50E+00 1.20E+00 4.50E+00 STJ L4315-01 45 Co-60 1.60E+00 1.50E+00 5.20E+00 STJ L4315-01 45 Cr-51 -6.OOE+00 1.20E+01 4.1OE+Ol STJ L4315-01 45 Cs-134 8.OOE-01 1.30E+00 4.50E+00 STJ L4315-01 45 Cs-137 -1.90E+00 1.30E+00 4.70E+00 STJ L4315-01 45 Fe-59 1.60E+00 2.60E+00 9.10E+00 STJ L4315-01 45 GROSS BETA 2.42E+00 9.40E-01 2.90E+00 STJ L4315-01 45 1-131 I.OOE-02 1.70E-01 8.60E-0O STJ L4315-01 45 K-40 3.90E+01 2.OOE+01 6.50E+0I STJ L4315-01 45 La-140 5.40E+00 3.10E+00 9.90E+00 STJ L4315-01 45 Mn-54 -5.OOE-01 1.20E+00 4.20E+00 STJ L4315-01 45 Nb-95 -1.50E+00 1.60E+00 6.OOE+00 STJ L4315-01 45 Ru-103 7.OOE-01 1.20E+00 4.OOE+00 STJ L4315-01 45 Ru-106 I.OOE+0O l.lOE+0 3.70E+0 STJ L4315-01 45 Sb-124 5.OOE-01 3.40E+00 1.20E+0O STJ L4315-01 45 Sb-125 -2.80E+00 2.80E+00 I.OOE+0O STJ L4315-01 45 Se-75 -1.OOE+00 1.40E+00 4.80E+00 STJ L4315-01 45 Zn-65 -3.60E+00 2.90E+00 I.1OE+01 STJ L4315-01 45 Zr-95 7.00E-01 2.20E+00 7.60E+00 LTW LA315-02 45 AcTh-228 L.OOE-01 3.30E+00 1.lOE+0O LTW L4315-02 45 Ag-108m -2.60E-01 6.70E-01 2.30E+00 LTW L4315-02 45 Ag-1 10m -l.OOE+00 l.OOE+00 3.70E+00 LTW L4315-02 45 Ba-140 -1.70E+00 1.50E+00 5.60E+00 LTW L4315-02 45 Be-7 4.OOE-01 6.70E+00 2.30E+0O LTW L4315-02 45 Ce-141 I.OOE+00 1.80E+00 6.10E+00 LTW L4315-02 45 Ce-144 2.20E+00 4.60E+00 1.50E+01 LTW L4315-02 45 Co-57 -7.80E-01 5.80E-01 2.OOE+00 LTW L4315-02 45 Co-58 1.30E+00 8.40E-01 2.80E+00 LTW L4315-02 45 Co-60 -8.70E-01 8.90E-01 3.20E+00 LTW L4315-02 45 Cr-51 5.70E+00 8.60E+00 2.90E+0O LTW L4315-02 45 Cs-134 1.48E+00 8.40E-01 2.70E+O0 LTW L4315-02 45 Cs-137 5.OOE-01 8.10E-01 2.70E+00 LTW L4315-02 45 Fe-59 -I.OOE-0O 1.80E+00 6.40E+00 LTW L4315-02 45 GROSS BETA 2.50E+00 I.OOE+00 3.10E+00 LTW L4315-02 45 1-131 3.OOE-01 2.30E-01 7.80E-01 LTW L4315-02 45 K-40 -1.90E+01 1.20E+01 4.40E+0O LTW L4315-02 45 La-140 -1.90E+00 1.70E+00 6.50E+OO LTW L4315-02 45 Mn-54 -4.OOE-01 7.80E-01 2.70E+OO

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-181

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L4315-02 45 Nb95 -2.20E+00 1.50E+00 5.20E+00 LTW L4315-02 45 Ru-103 -6.00E-01 8.302-01 2.90E+00 LTW L4315-02 45 Ru-106 -1.73E+01 7.00E+00 2.602+01 LTW L4315-02 45 Sb-124 1.90E+00 2.101E+00 7.102+00 LTW L4315-02 45 Sb-125 -2.50E+00 2.00E+00 7.102+00 LTW L4315-02 45 Se-75 5.00E-01 1.00E+00 3.402+00 LTW L4315-02 45 Zn-65 1.90E+00 3.50E+00 1.20E+01 LTW L4315-02 45 Zr-95 1.30E+00 1.40E+00 4.70E+00 STJ L4426-01 47 AcTh-228 8.80E+00 6.00E+00 2.00E+01 STJ L4426-01 47 Ag-108m -1.30E+00 l.00E+00 3.60E+00 STJ L4426-01 47 Ag-I lOm -2.40E+00 1.70E+00 6.302+00 STJ L4426-01 47 Ba- 140 -4.00E-01 2.60E+00 9.802+00 STJ L4426-01 47 Be-7 -1.60E+01 1.20E+01 4.30E+01 STJ L4426-01 47 Ce-141 2.70E+00 1.90E+00 6.1 OE+00 STJ L4426-01 47 Ce-144 -5.102+00 5.90E+00 2.10E+01 STJ L4426-01 47 Co-57 9.70E-01 7.90E-01 2.602+00 STJ L4426-01 47 Co-58 -1.70E+00 1.20E+00 4.602+00 STJ L4426-01 47 Co-60 1.102+00 1.40E+00 4.702+00 STJ L4426-01 47 Cr-51 4.00E+00 1.202+01 4.002+01 STJ L4426-01 47 Cs-134 1. O10+00 1.40E+00 4.802+00 STJ L4426-01 47 Cs-137 1.002-01 1.30E+00 4.50E+00 STJ L4426-01 47 Fe-59 1.60E+00 2.90E+00 1.002+01 STJ L4426-01 47 GROSS BETA 4.60E+00 1.10E+00 3.00E+00 STJ L4426-01 47 1-131 8.002-02 2.00E-01 8.50E-01 STJ L4426-01 47 K-40 3.20E+0O 2.00E+01 6.50E+01 STJ L4426-01 47 La-140 -4.002-01 3.00E+00 1.102+01 STJ L4426-01 47 Mn-54 -2.20E+00 1.30E+00 5.002+00 STJ L4426-01 47 Nb-95 -8.00E-01 1.60E+00 5.90E+00 STJ L4426-01 47 Ru-103 -3.00E+00 1.20E+00 4.80E+00 STJ L4426-01 47 Ru-106 2.202+01 1.102+01 3.60E+01 STJ L4426-01 47 Sb-1 24 5.00E-01 3.50E+00 1.30E+01 STJ L4426-01 47 Sb-125 -3.70E+00 3.20E+00 1.20E+01 STJ L4426-01 47 Se-75 1.202+00 1.60E+00 5.402+00 STJ L4426-01 47 Zn-65 2.702+00 3.80E+00 1.302+01 STJ L4426-01 47 Zr-95 -1.402+00 2.10E+00 7.70E+00 LTW L4426-02 47 AcTh-228 -1.29E+01 5.00E+00 1.902+01 LTW L4426-02 47 Ag-108m 1.802+00 1.00E+00 3.30E+00 LTW L4426-02 47 Ag-llOm 2.002-01 1.70E+00 5.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-182

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L4426-02 47 Ba-140 -1.90E+00 2.70E+00 1.OOE+01 LTW L4426-02 47 Be-7 1.30E+01 l. lOE+0O 3.50E+01 LTW L4426-02 47 Ce-141 -2.00E-01 1.70E+00 5.80E+00 LTW L4426-02 47 Ce-144 9.OOE+00 5.80E+00 1.90E+01 LTW L4426-02 47 Co-57 8.OOE-02 7.20E-01 2.50E+00 LTW L4426-02 47 Co-58 -1.40E+00 1.20E+00 4.70E+00 LTW L4426-02 47 Co-60 -1.OOE-01 1.30E+00 4.80E+00 LTW L4426-02 47 Cr-51 2.OOE+00 1.1OE+01 3.90E+01 LTW L4426-02 47 Cs-1 34 2.30E+00 1.20E+00 3.70E+OO LTW L4426-02 47 Cs-137 -8.OOE-01 1.20E+00 4.20E+00 LTW L4426-02 47 Fe-59 -3.80E+00 2.80E+00 1.tOE+01 LTW L4426-02 47 GROSS BETA 2.24E+00 9.70E-01 3.IOE+00 LTW L4426-02 47 1-131 6.20E-01 2.90E-01 7.60E-01 LTW L4426-02 47 K-40 -1.40E+01 2.OOE+0O 7.30E+01 LTW L4426-02 47 La-140 -2.20E+00 3.10E+00 1.20E+01 LTW L4426-02 47 Mn-54 3.20E+00 1.40E+00 4.40E+00 LTW L4426-02 47 Nb-95 1.OOE+00 1.40E+00 4.70E+00 LTW L4426-02 47 Ru-103 -1.1OE+00 1.30E+00 4.70E+00 LTW L4426-02 47 Ru-106 1.50E+01 1.1OE+01 3.50E+01 LTW L4426-02 47 Sb-124 1.50E+00 3.10E+00 l. 1OE+01 LTW L4426-02 47 Sb-125 -1.30E+00 2.90E+00 1.OOE+01 LTW L4426-02 47 Se-75 - 1.80E+00 1.40E+00 4.80E+00 LTW L4426-02 47 Zn-65 -3.30E+00 2.60E+00 9.80E+00 LTW L4426-02 47 Zr-95 -1.30E+00 2.1OE+00 7.70E+00 STJ L4503-01 49 AcTh-228 -1.20E+00 3.50E+00 1.30E+0I STJ L4503-01 49 Ag-108m -3.30E-0I 8.70E-01 3.20E+00 STJ L4503-01 49 Ag- lOnm -1 .82E+00 9.70E-01 4.40E+OO STJ L4503-01 49 Ba-140 2.60E+00 2.10E+00 7.OOE+00 STJ L4503-01 49 Be-7 -4.70E+00 8.50E+00 3.20E+01 STJ L4503-01 49 Ce-141 -2.70E+00 2.OOE+00 7.30E+00 STJ LA503-01 49 Ce-144 4.70E+00 6.20E+00 2.IOE+01 STJ L4503-01 49 Co-57 -9. lOE-01 8.90E-01 3.20E+00 STJ L4503-01 49 Co-58 1.51E+00 9.90E-01 3.20E+00 STJ L4503-01 49 Co-60 O.OOE+00 9.50E-O1 3.70E+00 STJ L4503-01 49 Cr-51 -3.OOE+00 . IlOE+01 3.90E+01 STJ L4503-01 49 Cs-134 6.OOE-01 l.lOE+00 3.90E+OO STJ L4503-01 49 Cs-137 5.00E-02 9.80E-01 3.60E+00 STJ L4503-01 49 Fe-59 -8.OOE-01 2.10E+O0 8.30E+00

Radioactivity detected in sample (i.e, concentration > 3 X standard deviation)

D-183

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg). (pCi/lkg)

STJ L4503-01 49 GROSS BETA 2.60E+O0 1.1OE+O0 3.30E+OO STJ L4503-01 49 1-131 -1.OOE-02 1.60E-01 9.50E-O1 STJ L4503-01 49 K-40 -1.70E+01 1.40E+01 5.50E+O1 STJ L4503-01 49 La-140 3.00E+00 2.40E+00 8.10E+OO STJ L4503-01 49 Mn-54 2.60E-01 7.50E-01 2.80E+OO STJ . L4503-01 49 Nb-95 2.00E-O1 I. IOE+0O 4.20E+0O STJ L4503-01 49 Ru-103 -1.90E+OO I.IOE+OO 4.30E+OO STJ LA503-01 49 Ru-106 -8.00E+00 9.80E+00 3.80E+O1 STJ L4503-01 49 Sb-124 2.40E+00 2.50E+00 8.80E+O0 STJ L4503-01 49 Sb-125 -3.OOE+00 2.80E+O0 I.IOE+0O STJ L4503-01 49 Se-75 1.80E+OO I.IOE+OO 3.70E+0O STJ L4503-01 49 Zn-65 -1.90E+00 2.30E+00 9.00E+OO STJ LU503-01 49 Zr-95 -2.60E+00 1.70E+00 7.20E+0O LTW L4503-02 49 AcTh-228 -2. 10E+00 4.30E+00 1.60E+01 LTW L4503-02 49 Ag-108m 2.30E-01 9.40E-01 3.40E+OO LTW L4503-02 49 Ag-ll0m -1.40E+O0 I.IOE+0O 4.80E+O0 LTW L4503-02 49 Ba-140 2.20E+00 2.00E+00 7.10E+OO LTW L4503-02 49 Be-7 4.90E+00 8.70E+00 3.10E+O1 LTW L4503-02 49 Ce-141 -1.80E+00 2.10E+00 7.60E+OO LTW L4503-02 49 Cc-144 8.30E+00 7.60E+00 2.50E+OI LTW L4503-02 49 Co-57 -4.90E-01 9.10E-01 3.20E+0O LTW L4503-02 49 Co-58 -1.60E+OO 1.IOE+OO 4.40E+O0 LTW L4503-02 49 Co-60 1.67E+00 9.60E-01 3.10E+OO LTW L4503-02 49 Cr-51 8.001E+00 1.20E-+01 4.OOE+O1 LTW L4503-02 49 Cs-134 8.40E-01 9.10E-01 3.10E+OO LTW L4503-02 49 Cs-137 0.OOE+OO 1.lOE+OO 4.1OE+O0 LTW L4503-02 49 Fe-59 -1.70E+00 2.40E+00 9.60E+OO LTW L4503-02 49 GROSS BETA 1.17E+00 9.30E-01 3.101E+OO LTW L4503-02 49 1-131 1.70E-OI I.1OE-O1 3.50E-0I LTW L4503-02 49 K-40 -I.OOE+OO 1.40E+01 5.10E+OI LTW L4503-02 49 La-140 2.60E+00 2.40E+00 8.10E+O0 LTW L4503-02 49 Mn-54 -1.80E+O0 I.I1OE+OO 4.40E+OO LTW L4503-02 49 Nb-95 1.IOE+00 1.20E+00 4.30E+0O LTW L4503-02 49 Ru-103 2.00E-01 1.20E+00 4.30E+OO LTW L4503-02 49 Ru-106 -6.20E+00 9.50E+00 3.60E+OI LTW L4503-02 49 Sb-124 -9.OOE-01 3.40E+00 1.30E+O1 LTW UA503-02 49 Sb-125 1.40E+00 2.90E+0O 1.OOE+OI LTW L4503-02 49 Se-75 1.30E1+00 1.50E+00 5.20E+00 LTW LA503-02 49 Zn-65 -5.70E+00 2.80E+OO I. IOE+0O LTW L4503-02 49 Zr-95 -1.90E+00 1.70E+00 7.10E+OO

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-184

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

STJ L4579-01 AcTh-228 9.202+O00 6.20E+00 2.001E+01 STJ L4579-01 Ag-108m -3.001E-01 I1.20E+00 4.10OE-e00 STJ L4579-01 Ag-110m -3.001E+00 2.OOE+O0 7.70E+O00 STJ L4579-01 Ba-140 0.OO3+O00 3.OOE+00 1.1OE+01 STJ LA579-01 Be-7 I1.50E-i.01 I1.20E+01 3.901E+01 STJ L4579-01 Ce-141 -2.001E-01 2.20E+O0 7.601E+00 STJ L4579-01 Ce-144 5.30E3+00 7.30E+00 2.50oE+01 STJ L4579-01 Co-57 5.20E-01 9.80E-01 3.301E+00 STJ L4579-01 Co-58 -2.30E+O0 1.40E+O0 5.401E+00 STJ L4579-01 Co-60 -1.OOE-01 I1.40E+00 5.101E-g0O STJ L4579-01 Cr-51 -2.OOE+00 I1.40E+01 5.OOE+01 STJ L4579-01 Cs- 134 3.301E+00 1.50E+O0 STJ LA579-01 Cs-137 6.OOE-01 1.40E+00 4.80E1i-00 STJ L4579-01 Fe-59 1.60E-i00 2.80E1i-00 1.OOE+01 STJ L4579-01 GROSS BETA 6.101E+00 1.20E+O0 3.IOE3+00 STJ LA579-01 1-131 6.OOE-01 3.30E-01 8.50E-01 STJ LA579-01 K-40 -1.80E+01 1.80E+01 6.90E+01 STJ LA579-01 La-140 0.OOE+00 3.40E3+00 I1.30E+01 STJ LA579-01 Mn-54 -1.40E+00 1.50E+O0 5.60E+O0 STJ L4579-01 Nb-95 -2.50E+00 1.60E+00 6.40E3+00 STJ L4579-01 Ru-103 -9.001E-01 I1.50E+O0 5.50E3+00 STJ L4579-01 Ru-106 -1.30E+01 I1.30E+01 4.701E+01 STJ L4579-01 Sb-124 1.90E-i00 3.70E+O0 I1.301E+01 STJ 14579-01 Sb-125 6.OOE-01 3.60Et-00 1.30E3+01 STJ L4579-01 Se-75 1.1OE+00 I1.801E+00 6. 101+00 STJ L4579-01 Zn-65 -4.30E+00 3.OOEi-00 I1.20E3+01 STJ L4579-01 Zr-95 1.60E+00 2.10OE+00 7.30E,-00 LTW L4579-02 AcTh-228 4.60E+O0 I1.70E3+01 LTW L4579-02 Ag-108m -1.33E+00 9.60E-01 3.50E+O00 LTW LA579-02 Ag-1 10m -9.OOE-01 1.60E+00 5.70E+O00 LTW L4579-02 Ba-140 3.50E+O0 2.30E+00 7.50E+O00 LTW I.4579-02 Be-7 -7.001E-01 9.90E-,00 3.501E+01 LTW 1A579-02 Ce-141 -4.801E+00 3.1OE+00 1.IOE+01 LTW L4579-02 Ce-144 -5.70E+O0 6.50E+O0 2.301E+01 LTW L4579-02 Co-57 5.10OE-01 8.80E-01 2.90E-,00 LTW L4579-02 Co-58 1.402+O00 I. IOE+00 3.701E+00 LTW LA579-02 Co-60 -I1.60E+00 1.30Ei-00 4.903+O00 LTW LA579-02 Cr-51 -1.70E+01 L1.OE+01 4.001E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-185

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

LTW L4579-02 51 Cs-134 -1.30E+00 1.30E+00 4.70E+00 LTW L4579-02 51 Cs-137 2.OOE-01 1. lOE+00 3.80E+00 LTW LA579-02 51 Fe-59 1.90E+00 2.50E+00 8.70E+00 LTW L4579-02 51 GROSS BETA 3.32E+00 9.70E-01 2.80E+00 * -

LTW L4579-02 51 1-13 -1.242-01 2.60E-02 8.20E-0O LTW L4579-02 51 K-40 -4.00E3+00 1.70E+01 5.90E+0O LTW L4579-02 51 La-140 4.OOE+00 2.60E+00 8.60E+00 LTW L4579-02 51 Mn-54 9.00E-01 1.1 OE+00 3.70E+00 LTW L4579-02 51 Nb-95 -1.50E+00 2.00E+00 7.10E+00 LTW L4579-02 51 Ru-103 9.00E-01 1.302+00 4.40E+00 LTW L4579-02 51 Ru-106 -8.00E+00 l.00O+01 3.70E+I01 LTW L4579-02 51 Sb-124 -2.20E+00 2.90E+00 1.1OE+01 LTW UA579-02 51 Sb-125 3.40E+00 3.10E+00 1.002+01 LTW L4579-02 51 Se-75 7.00E-01 1.40E+00 4.80E+00 LTW L4579-02 51 Zn-65 -6.50E+00 2.90E+00 1.10+01I LTW L4579-02 51 Zr-95 -2.00E+00 2.00E+00 7.30E+00 STI L2874-01 Ql H-3 5.00E+01 4.30E+02 1.30E+03 LTW L2874-02 Ql H-3 2.30E+02 4.402+02 1.302+03 STJ L3586-01 Q2 H-3 -1.00O+02 4.102+02 1.202+03 LTW L3586-02 Q2 H-3 7.00E+02 4.20E+02 1.20E+03 STJ L4291-01 Q3 H-3 2.10E+02 2.80E+02 9.00E+02 LTW L4291-02 Q3 H-3 1.80E+02 2.80E+02 8.90E+02 STJ L4881-01 Q4 H-3 2.70E+02 4.20E+02 1.302+03 LTW L4881-02 Q4 H-3 -1.60E+02 4.20E+02 1.30E+03

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-186

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

WG W-1 L2173-01 04 AcTh-228 2.10E+00 3.60E+00 1.20E+01 W.l L2173-01 04 Ag-108m 2.10E-01 5.80E-01 2.OOE+00 W-1 L2173-01 04 Ag-I blm 1.94E+00 9.50E-01 3.10E+00 W-l L2173-01 04 Ba-140 -I.OOE+00 2.10E+00 7.50E+00 W-l L2173-01 04 Be-7 4.20E+00 6.50E+00 2.20E+01 W-l L2173-01 04 Ce-141 1.80E+00 1.80E+00 6.10E+00 W-l L2173-01 04 Ce-144 8.30E+00 3.70E+00 1.20E+0O W-l L2173-01 04 Co-57 -1.90E-01 4.70E-01 1.60E+00 W-l L2173-01 04 Co-58 -1.23E+00 7.40E-01 2.70E+00 W-l L2173-01 04 Co-60 1.85E+00 7.80E-01 2.50E+00 W-l L2173-01 04 Cr-51 1.OOE+01 8.90E+00 3.OOE+0O W-l L2173-01 04 Cs-134 9.70E-01 6.90E-01 2.30E+00 W-l L2173-01 04 Cs-137 -1.19E+00 7.30E-01 2.60E+00 W-l L2173-01 04 Fe-59 -3.OOE+00 2.50E+00 8.90E+00 W-I L2173-01 04 H-3 2.60E+02 3.70E+02 I.I0E+03 W-l L2173-01 04 1-131 3.50E+00 4.20E+00 1.40E+0I W-l L2173-01 04 K-40 -1.60E+01 1.30E+01 4.40E+0O W-l L2173-01 04 La-140 -1.IOE+00 2.40E+00 8.60E+00 W-l L2173-01 04 Mn-54 -8.10E-01 6.30E-01 2.30E+00 W-l L2173-01 04 Nb-95 1.68E+00 9.80E-01 3.20E+00 W-l L2173-01 04 Ru-103 -1.04E+00 9.OOE-01 3.20E+00 W-I L2173-01 04 Ru-106 -1.23E+01 6.90E+00 2.40E+0O W-l L2173-01 04 Sb-124 -5.00E-01 1.80E+00 6.50E+00 W-I L2173-01 04 Sb-125 -1.40E+00 1.80E+00 I.IOE+01 W-1 L2173-01 04 Se-75 1.60E-01 7.80E-01 2.60E+00 W-l L2173-01 04 Zn-65 2.30E+00 2.OOE+00 6.40E+00 W-l L2173-01 04 Zr-95 3.OOE-01 1.40E+00 4.80E+00 W-2 L2173-02 04 AcTh-228 -6.90E+00 4.10E+00 1.50E+0O W-2 L2173-02 04 Ag-108m -1.59E+00 7.60E-01 2.80E+00 W-2 L2173-02 04 Ag-I lOm 1.70E+00 1.30E+00 4.40E+00 W-2 L2173-02 04 Ba-140 -2.40E+00 2.20E+00 8.40E+00 W-2 L2173-02 04 Be-7 5.30E+00 8.60E+00 2.90E+01 W-2 L2173-02 04 Ce-141 O.OOE+00 1.50E+00 5.OOE+00 W-2 L2173-02 04 Ce-144 -5.00E+00 5.OOE+00 1.70E+0O W-2 L2173-02 04 Co-57 -3.OOE-01 5.90E-01 2.OOE+00 W-2 L2173-02 04 Co-58 7.60E-01 9.50E-01 3.20E+00 W-2 L2173-02 04 Co60 2.OOE-02 9.OOE-01 3.20E+00 W-2 L2173-02 04 Cr-51 Q.OOE+00 I.IOE+01 3.70E+01 W-2 L2173-02 04 Cs-134 2.10E-01 9.40E-01 3.30E+O0

Radioactivity detected insample (i.e., concentration > 3 X standard deviation)

D-187

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-2 L2173-02 04 Cs-137 6.20E-01 9.OOE-01 3.10E+00 W-2 L2173-02 04 Fe-59 9.OOE-01 2.80E+00 9.70E+00 W-2 L2173-02 04 H-3 1.70E+02 3.60E+02 I.IOE+03 W-2 L2173-02 04 1-131 2.OOE+00 4.20E+00 1.40E+01 W-2 L2173-02 04 K-40 -7.OOE+0O 1.50E+01 5.30E+01 W-2 L2173-02 04 La-140 -2.80E+00 2.50E+00 9.70E+00 W-2 L2173-02 04 Mn-54 -2.50E-01 7.90E-01 2.80E+00 W-2 L2173-02 04 Nb-95 8.OOE-01 1.20E+00 4.OOE+00 W-2 L2173-02 04 Ru-103 -1.60E+00 1.1OE+00 4.OOE+00 W-2 L2173-02 04 Ru-106 1.60E+00 8.70E+00 3.00E+OI W-2 L2173-02 04 Sb-124 3.OOE-01 2.40E+00 8.50E+OO W-2 L2173-02 04 Sb-125 -6.70E+00 2.30E+00 8.60E+00 W-2 L2173-02 04 Se-75 -5.00E-01 I.OOE+OO 3.60E+00 W-2 L2173-02 04 Zn-65 2.00E-01 2.70E+00 9.50E+00 W-2 L2173-02 04 Zr-95 -9.00E-01 1.80E+00 6.50E+OO W-3 L2173-03 04 AcTh-228 4.OOE+00 4.50E+00 1.50E+01 W-3 L2173-03 04 Ag-108m 6.30E-01 6.70E-01 2.30E+00 W-3 L2173-03 04 Ag-ll0m -5.OOE-01 I.1OE+00 3.90E+00 W-3 L2173-03 04 Ba-140 -2.OOE-01 2.30E+00 8.40E+00 W-3 L2173-03 04 Be-7 8.00E-01 7.90E+00 2.70E+01 W-3 L2173-03 04 Cc-141 2.OOE-01 2.30E+00 7.80E+00 W-3 L2173-03 04 Ce-144 6.OOE-01 4.90E+00 1.60E+01 W-3 L2173-03 04 Co-57 -4.OOE-01 6.20E-01 2.10E+00 W-i L2173-03 04 Co-58 9.20E-01 9.40E-01 3.20E+00 W-3 L2173-03 04 Co-60 1.IIE+00 8.60E-01 2.90E+00 W-3 L2173-03 04 Cr-51 5.OOE+00 I.IOE+01 3.60E+01 W-3 L2173-03 04 Cs-134 6.50E-01 8.80E-01 3.OOE+00 W-3 L2173-03 04 Cs-137 -2.40E-01 9.10E-01 3.20E+00 W-3 L2173-03 04 Fe-59 2.20E+00 2.50E+00 8.50E+00 W-3 L2173-03 04 H-3 -3.70E+02 3.60E+02 1.IOE+03 W-3 L2173-03 04 1-131 -5.60E+00 4.40E+00 1.50E+0O W-3 L2173-03 04 K-40 8.OOE+00 1.40E+01 4.70E+01 W-3' L2173-03 04 La-140 -3.OOE-01 2.70E+00 9.60E+00 W-3 L2173-03 04 Mn-54 2.10E-01 8.40E-01 2.90E+OO W-3 L2173-03 04 Nb-95 -I.OOE+00 1.30E+00 4.60E+00 W-3 L2173-03 04 Ru-103 -8.OOE-0I 1.10E+00 3.70E+00 W-3 L2173-03 04 Ru-106 -1.1IE+0 8.IOE+00 2.90E+01 W-3 L2173-03 04 Sb-124 5.00E-01 2.40E+00 8.50E+00 W-3 L2173-03 04 Sb-125 1.70E+00 2.10E+00 7.20E+00 W-3 L2173-03 04 Se-75 -1.OOE-01 l.IOE+00 3.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-188

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-3 L2173-03 04 Zn-65 8.20E+00 3.50E+00 1.lOE+01 W-3 L2173-03 04 Zr-95 -8.OOE-01 1.50E+00 5.30E+00 W-4 L2173-04 04 AcTh-228 2.70E+00 4.70E+00 1.60E+O I W-4 L2173-04 04 Ag-108m -3.50E-01 9.90E-01 3.50E+00 W-4 L2173-04 04 Ag-lOnm 1.IOE+00 1.80E+00 6.20E+00 W4 L2173-04 04 Ba-140 6.70E+00 2.90E+00 8.80E+00 W4 L2173-04 04 Be-7 -1.20E+O1 1.IOE+01 4.00E+0l W4 L2173-04 04 Ce-141 2.30E+00 2.90E+00 9.80E+00 W4 L2173-04 04 Ce-144 9.10E01+00 6.40E+00 2AOE+0l W4 L2173-04 04 Co-57 -8.20E-01 8.50E-01 3.OOE+00 W4 L2173-04 04 Co-58 1.20E+00 1.20E+00 4.00E+00 W4 L2173-04 04 Co-60 2.60E+00 1.20E+00 3.80E+00 W4 L2173-04 04 Cr-51 -3.40E+01 1.40E+01 5.OOE+01 W4 L2173-04 04 Cs-134 8.OOE-01 1.30E+00 4.30E+00 WA4 L2173-04 04 Cs-137 -4.OOE-01 1.30E+00 4.60E+00 W4 L2173-04 04 Fe-59 I.OOE+00 3.70E+00 1.30E+01 W4 L2173-04 04 H-3 5.OOE+02 3.70E+02 1.IOE+03 W4 L2173-04 04 1-131 -2.40E+00 4.70E+00 1.60E+01 W4 L2173-04 04 K-40 -9.OOE+00 1.80E+01 6.40E+01 W4 L2173-04 04 La-140 7.70E+00 3.30E+00 l.OOE+01 W4 L2173-04 04 Mn-54 3.00E-01 1.20E+00 4.10E+00 W4 L2173-04 04 Nb-95 -3.20E+00 1.70E+00 6.20E+00 W4 L2173-04 04 Ru-103 2.OOE-01 1.40E+00 4.90E+00 W4 L2173-04 04 Ru-106 -1.20E+0 LIlOE+01 4.OOE+01 W4 L2173-04 04 Sb-124 -4.00E-01 3.90E+00 1.40E+01 W4 L2173-04 04 Sb-125 -2.80E+00 3.OOE+00 1.10E+01 WA4 L2173-04 04 Se-75 -2.1OE+00 1.60E+00 5.60E+00 W4 L2173-04 04 Zn-65 5.OOE-01 3.30E+00 1.lOE+01 W-4 L2173-04 04 Zr-95 -5.OOE-01 2.OOE+00 7.10E+00 W-5 L2173-05 04 Acrb-228 7.50E+00 3.50E+00 l.lOE+01 W-5 L2173-05 04 Ag-108m -1.38E+00 8.20E-01 3.OOE+00 W-5 L2173-05 04 Ag-l1Orm I.OOE-01 1.30E+00 4.50E+00 W-5 L2173-05 04 Ba-140 -4.20E+00 2.70E+00 1.OOE+01 W-5 L2173-05 04 Be-7 -4.50E+00 8.70E+00 3.10E+01 W-5 L2173-05 04 Ce-141 3.OOE+00 1.80E+00 5.80E+00 W-5 L2173-05 04 Ce-144 1.90E+00 5.50E+00 I.90E+OI W-5 L2173-05 04 Co-57 5.00E-02 6.80E-01 2.30E+00 W-5 L2173-05 04 Co-58 -6.70E-01 9.60E-01 3.50E+00 W-5 L2173-05 04 Co-60 8.40E-01 9.90E-01 3.40E+00 W-5 L2173-05 04 Cr-51 -I.IOE+01 1.20E+01 4.00E+I01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-189

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-5 L2173-05 04 Cs-134 4.80E-01 9.90E-01 3.40E+00 W-5 L2173-05 04 Cs-137 -7.OOE-01 1.OOE+00 3.60E+00 W-5 L2173-05 04 Fe-59 -3.00E-01 3.20E+00 1.102+01 W-5 L2173-05 04 H-3 2.40E+02 3.30E+02 l.OOE+03 W-5 L2173-05 04 1-131 1.60E+00 4.40E+00 1.502+01 W-5 L2173-05 04 K-40 1.17E+02 1.90E+01 5.60E+01 W-5 L2173-05 04 La-140 -4.90E+00 3.20E+00 1.20E+01 W-5 L2173-05 04 Mn-54 -I.OOE-01 1.OOE+00 3.50E+00 W-5 L2173-05 04 Nb-95 -5.00E+00 1.50E+00 5.80E+00 W-5 L2173-05 04 Ru-103 -9.OOE-01 1.20E+00 4.20E+00 W-5 L2173-05 04 Ru-106 l.OOE-01 9.20E+00 3.20E+01 W-5 L2173-05 04 Sb-124 2.70E+00 2.60E+00 8.80E+00 W-S L2173-05 04 Sb-125 -9.OOE-01 2.60E+00. 9.00E+00 w-s L2173-05 04 Se-75 -6.00E-01 1.30E+00 4.40E+00 W-5 L2173-05 04 Zn-65 -7.OOE-01 2.00E+00 7.10E+00 W-5 L2173-05 04 Zr-95 6.00E-01 1.80E+00 6.30E+00 W-6 L2173-06 04 AcTh-228 -2.00E+00 4.00E+00 1.40E+01 W-6 L2173-06 04 Ag-108m -1.01+00 7.80E-01 2.80E+00 W-6 L2173-06 04 Ag-ll0m 1.00E-01 1.30E+00 4.70E+00 W-6 L2173-06 04 Ba-140 -1. 4 0Et+O 2.70E+00 9.70E+00 W-6 L2173-06 04 Be-7 -4.80E+00 8.70E+00 3.10E+01 W-6 L2173-06 04 Ce-141 1.20E+00 1.60E+00 5.20E+00 W-6 L2173-06 04 Ce-144 3.90E+00 5.50E+00 1.80E+01 W-6 L2173-06 04 Co-57 1.67E+00 7.30E-01 2.40E+00 W-6 L2173-06 04 Co-58 -1.40E+00 1.10E+00 4.00E+00 W-6 L2173-06 04 Co-60 2.40E-01 9.502-01 3.40E+00 W-6 L2173-06 04 Cr-51 1.10E+01 1.10+01 3.80E+01 W-6 L2173-06 04 Cs-134 -6.20E-01 9.90E-01 3.60E+00 W-6 L2173-06 04 Cs-137 1.20E+00 1.lOE+00 3.50E+00 W-6 L2173-06 04 Fe-59 -9.002-01 2.80E+00 l.OOE+01 W-6 L2173-06 04 H-3 6.40E+02 3.70E+02 1.10E+03 W-6 L2173-06 04 1-131 3.50E+00 4.30E+00 1.50E+01 W-6 L2173-06 04 K-40 3.10E+01 1.60E+01 5.10E+01 W-6 L2173-06 04 La-140 -1.60E+00 3.10E+00 1.10E+01 W-6 L2173-06 04 Mn-54 9.80E-01 9.60E-01 3.20E+00 W-6 L2173-06 04 Nb-95 -1.20E+00 1.40E+00 4.90E+00 W-6 L2173-06 04 Ru-103 -2.70E+00 1.20E+00 4.40E+00 W-6 L2173-06 04 Ru-106 1.94E+01 8.90E+00 2.90E+01 W-6 L2173-06 04 Sb-124 1.90E+00 2.80E+00 9.502+00 W-6 L2173-06 04 Sb-125 -1.1OE+00 2.50E+00 8.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D- 190

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-6 L2173-06 04 Se-75 2. 10E+00 1.30E+O0 4.20E+00 W-6 L2173-06 04 Zn-65 l.OOE+00 2.40E+0O 8.20E+O0 W-6 L2173-06 04 Zr-95 3.OOE+00 1.80E+OO 5.90E3+00 W-7 L2173-07 04 AcTh-228 -4.60E+00 5.10E+O0 1.80E+OI W-7 L2173-07 04 Ag-108m -2.08E+O0 9.50E-O1 3.60E+00 W-7 L2173-07 04 Ag-l1Om 1.80E+00 1.60E+00 5.50E+00 W-7 L2173-07 04 Ba-140 -3.OOE+O0 3. 1OE+00 1.20E+OI W-7 L2173-07 04 Be-7 l.OOE+O0 l.OOE+01 3.70E+O1 W-7 L2173-07 04 Ce-141 -2.OOE-01 2.20E+00 7.60E+O0 W-7 L2173-07 04 Ce-144 -9.30E+00 6.40E+00 2.30E+O1 W-7 L2173-07 04 Co-57 -1.73E+00 8.10E-0O 2.90E+00 W-7 L2173-07 04 Co-58 l.OOE+00 1.20E+00 4.00E+00 W-7 L2173-07 04 Co-60 -1.40E+00 1.30E+O0 4.80E+00 W-7 L2173-07 04 Cr-51 8.OOE+00 1.40E+0O 4.70E+0O W-7 L2173-07 04 Cs-134 9.OOE-01 1.20E+O0 4.10E+00 W-7 L2173-07 04 Cs-137 -6.OOE-01 1.20E+00 4.20E+00 W-7 L2173-07 04 Fe-59 1.50E+00 3.70E+00 1.30E+OI W-7 L2173-07 04 H-3 -6.70E+02 3.50E+02 1.20E+03 W-7 L2173-07 04 1-131 -9.30E+00 5.60E+00 2.10E+0O W-7 L2173-07 04 K-40 -2.OOE+00 1.80E+01 6.50E+01 W-7 L2173-07 04 La-140 -3.50E+00 3.60E+00 1.40E+0O W-7 L2173-07 04 Mn-54 1.40E+00 l.OOE+00 3.50E+00 W-7 L2173-07 04 Nb-95 -I. IOE+00 1.50E+00 5.50E+O0 W-7 L2173-07 04 Ru-103 -2.70E+OO 1.50E+00 5.70E+00 W-7 L2173-07 04 Ru-106 2.OOE+00 l.lOE+01 3.90E+0O W-7 L2173-07 04 Sb-124 6.80E+00 3.10E+00 9.40E+00 W-7 L2173-07 04 Sb-125 -5.90E+O0 2.90E+00 1.1OE+01 W-7 L2173-07 04 Se-75 8.OOE-01 1.30E+00 4.40E+00 W-7 L2173-07 04 Zn-65 -6.OOE-0O 2.80E+00 l.OOE+0O W-7 L2173-07 04 Zr-95 6.OOE-0O 2.30E+00 8.10E+00 W-8 L2173-08 04 AcTb-228 -9.OOE-0O 3.90E+O0 1.30E+01 W-8 L2173-08 04 Ag-108m 6.70E-01 6.20E-OI 2. 10E+O0 W-8 L2173-08 04 Ag-l1lm 1.37E+O0 9.90E-01 3.30E+O0 W-8 L2173-08 04 Ba-140 2.30E+00 2.30E+00 7.90E+00 W-8 L2173-08 04 Be-7 -1.31E+O1 7.20E+00 2.60E+0O W-8 L2173-08 04 Ce-141 6.OOE-0O 1.40E+0O 4.70E+00 W-8 L2173-08 04 Ce-144 2.20E+00 4.20E+O0 1.40E+OI W-8 L2173-08 04 Co-57 5.30E-0O 5.60E-0O 1.80E+00 W-8 L2173-08 04 Co-58 -3.OOE-0O 7.90E-0O 2.80E+00 W-8 L2173-08 04 Co-60 9.1OE-0I 7.60E-0O 2.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-191

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-8 L2173-08 04 Cr-SI 1.14E+01 9.40E+00 3.102+01 W-8 L2173-08 04 Cs-134 4.20E-01 7.40E-01 2.50E+00 W-8 L2173-08 04 Cs-137 -2.05E+00 8.00E-01 2.90E+00 W-8 L2173-08 04 Fe-59 -5.40E+00 2.50E+00 9.302+00 W-8 L2173-08 04 H-3 -6.OOE+01 3.60E+02 1.102+03 W-8 L2173-08 04 1-131 -6.70E+00 4.00E+00 1.40E+01 W-8 L2173-08 04 K-40 1.30E+I01 1.30E+01 4.502+01 W-8 L2173-08 04 La-140 2.70E+00 2.70E+00 9.10E+00 W-8 L2173-08 04 Mn-54 4.90E-01 7.70E-01 2.602+00 W-8 L2173-08 04 Nb-95 -3.40E+00 1.40E+00 4.90E+00 W-8 L2173-08 04 Ru-103 -3. 10E+00 9.60E-01 3.50E+00 W-8 L2173-08 04 Ru-106 1.39E+01 7.00E+00 2.30E+01 W-8 L2173-08 04 Sb-124 -2.30E+00 2.10E+00 7.80E+00 W-8 L2173-08 04 Sb-125 5.002-01 1.90E+00 6.402+00 W-8 L2173-08 04 Se-75 -1.OOE-01 1.00O+00 3.50E+00 W-8 L2173-08 04 Zn-65 -8.OOE-01 1.60E+00 5.70E+00 W-8 L2173-08 04 Zr-95 1.501E+00 1.40E+00 4.60E+00 W-9 L2173-09 04 Acih-228 4.40E+00 2.50E+00 8.30E+00 W-9 L2173-09 04 Ag-108m 3.40E-01 5.50E-01 1.902+00 W-9 L2173-09 04 Ag- lOnm 3.50E-01 9.40E-01 3.20E+00 W-9 L2173-09 04 Ba-140 -1.90E+00 2.00E+00 7.302+00 W-9 L2173-09 04 Be-7 -1.90E+00 6.40E+00 2.202+01 W-9 L2173-09 04 Ce- 141 2.80E+00 1.20E+00 4.00E+00 W-9 L2173-09 04 Ce-144 2.10E+00 3.70E+00 1.20E+01 W-9 L2173-09 04 Co-57 7.40E-01 4.70E-01 1.60E+00 W-9 L2173-09 04 Co-58 -4.80E-01 6.70E-01 2.402+00 W-9 L2173-09 04 Co-60 -6.90E-01 7.60E-01 2.70E+00 W-9 L2173-09 04 Cr-51 -1.20E+01 8.60E+00 3.00E+01 W-9 L2173-09 04 Cs-134 3.40E-01 6.80E-01 2.302+00 W-9 L2173-09 04 Cs-137 -1.90E-01 7.40E-01 2.60E+00 W-9 L2173-09 04 Fe-59 6.00E-01 2.20E+00 7.70E+00 W-9 L2173-09 04 H-3 -8.00E+01 3.60E+02 1.IOE+03 W-9 L2173-09 04 I-131 -8.00E-01 3.60E+00 1.20E+01 W-9 L2173-09 04 K-40 -2.00E+00 1.30E+01 4.402+01 W-9 L2173-09 04 La-140 -2.20E+00 2.30E+00 8.40E+00 W-9 L2173-09 04 Mn-54 -7.20E-01 6.102-01 2.20E+00 W-9 L2173-09 04 Nb-95 4.00E-02 9.30E-01 3.20E+00 W-9 L2173-09 04 Ru-103 -5.90E-01 8.80E-01 3.10E+00 W-9 L2173-09 04 Ru-106 1.20E+00 6.50E+00 2.20E+01 W-9 L2173-09 04 Sb-124 2.00E-01 1.90E+00 6.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-192

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W.9 L2173-09 04 Sb-125 -2.60E+00 1.70E+00 6.OOE+00 W-9 L2173-09 04 Se-75 5.60E-01 7.70E-0I 2.60E+00 W-9 L2173-09 04 Zn-65 l.OOE-0O 1.40E+00 4.90E+00 W-9 L2173-09 04 Zr-95 2.60E+00 1.30E+00 4.30E+00 w-10 L2173-10 04 AcTh-228 3.50E+00 4.20E+00 1.40E+01 w-10 L2173-10 04 Ag- 108m -3.70E-0O 7.30E-01 2.SOE+00 w-10 L2173-10 04 Ag-I lOm 2.10E+00 1.30E+00 4.30E+00 w-10 L2173-10 04 Ba- 140 3.OOE-01 3.10E+00 1.1OE+01 w-10 L2173-10 04 Be-7 1.44E+01 8.50E+00 2.80E+01 W-10 L2173-10 04 Ce-141 -2.70E+00 2.50E+00 8.60E+00 w-1o L2173-10 04 Ce-144 2.OOE+00 4.60E+00 1.50E+01 w-10 L2173-10 04 Co-57 3.30E-01 5.80E-01 1.90E+00 w-1o L2173-10 04 Co-58 9.OOE-01 l.OOE+00 3.40E+00 w-10 L2173-10 04 Co-60 -8.OOE-01 l.OOE+00 3.70E+00 w-10 L2173-10 04 Cr-51 -6.OOE+00 1.lOE+01 3.80E+0O w-10 L2173-10 04 Cs-134 -2.60E+00 1.lOE+00 4.OOE+00 w-l0 L2173-10 04 Cs-137 -3.30E-01 9.90E-01 3.40E+00 w-10 L2173-10 04 Fe-59 -5.20E+00 3.10E+00 1.20E+01 w-10 L2173-10 04 H-3 6.OOE+0O 3.60E+02 1.lOE+03 w-10 L2173-10 04 1-131 5.30E+00 5.IOE+00 1.70E+01 w-10 L2173-10 04 K-40 8.OOE+00 1.60E+01 5.60E+0O w-10 L2173-10 04 La-140 4.OOE-01 3.60E+0O 1.30E+0O w-10 L2173-10 04 Mn-54 O.OOE+00 9.30E-01 3.20E+00 w-l0 L2173-10 04 Nb-95 -I.OOE+00 1.20E+00 4.40E+00 w-1o L2173-10 04 Ru-103 -3.OOE-0I 1.20E+00 4.OOE+00 w-10 L2173-10 04 Ru-106 -7.80E+00 8.10E+00 2.90E+0O W-10 L2173-10 04 Sb-124 3.60E+00 2.90E+00 9.90E+00 w-10 L2173-10 04 Sb-125 -8.OOE-01 2.30E+00 8.OOE+00 W-10 L2173-10 04 Se-75 1.20E+00 1.lOE+00 3.80E+00 W-10 L2173-10 04 Zn-65 5.20E+00 4.90E+00 1.60E+01 w-lo L2173-10 04 Zr-95 -4.OOE-01 1.60E+00 5.70E+00 w-1I L2173-11 04 AcTh-228 1.14E+01 3.80E+00 1.20E+01 w-1l L2173-11 04 Ag-108m -1.15E+00 8.70E-01 3.20E+00 w-1I L2173-11 04 Ag-i lOin 4. IOE+00 l.50E+00 4.50E+00 w-1j L2173-11 04 Ba-140 -1.90E+00 3.30E+00 1.20E+0O w-.I L2173-11 04 Be-7 8.OOE+00 1.OOE+01 3.50E+01 w-I L2173-11 04 Ce-141 3.60E+00 2.O0E+00 6.60E+00 w-I L2173-11 04 Ce-144 3.70E+00 5.80E+00 2.00E+01 w-1I L2173-11 04 Co-57 7.30E-01 7.60E-01 2.50E+00 W-1I L2173-11 04 Co-58 -8.OOE-01 l.lOE+00 4.20E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-193

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg) w-1I L2173-11 04 Co-60 -2.00E-01 1.10E+00 4.002+00 w-11 L2173-11 04 Cr-51 -4.002+00 1.30E+01 4.40E+01 w-1I L2173-11 04 Cs-134 7.00E-01 1.OOE+00 3.50E+00 w-1I L2173-11 04 Cs-137 -2.60E+00 1. 1OE+00 4.20E+00 w.11 L2173-11 04 Fe-59 4.80E+00 3.60E+00 1.202+01 w-11 L2173-1 1 04 H-3 3.00E+01 3.70E+02 1.20E+03 w-1j L2173-11 04 1-131 1.30E3+00 5.50E+00 1.90E+01 w-11 L2173-11 04 K-40 6.00E+00 1.70E+01 5.802+01 w-1 L2173-11 04 La-140 -2.20E+00 3.80E+00 1.40E+01 w-11 L2173-11 04 Mn-54 2.10E+00 1.E10+00 3.60E+00 w-11 L2173-11 04 Nb-95 -3.002-01 1.302+00 4.60E+00 w-11 L2173-11 04 Ru-103 -8.OOE-01 1.30E+00 4.70E+00 w-11 L2173-11 04 Ru-106 1.OOE+01 1.002+01 3.50E+01 w-11 L2173-1 1 04 Sb-124 -7.00E-01 2.402+00 9.102+00 w-Il L2173-11 04 Sb-125 4.OOE-01 2.80E+00 9.70E+00 w-1l L2173-11 04 Se-75 -1.00-01 1.40E+00 4.70E+00 w-11 L2173-11 04 Zn-65 -3. IOE+00 2.30E+00 8.60E+00 w-11 L2173-11 04 Zr-95 2.60E+00 1.80E+00 5.90E+00 W-12 L2173-12 04 Acnh-228 8.80E+00 4.30E+00 1.402+01 W-12 L2173-12 04 Ag-108m -9.40E-01 8.602-01 3.102+00 W-12 L2173-12 04 Ag-l lOIm 2.40E+00 1.30E+00 4.30E+00 W-12 L2173-12 04 Ba-140 -3.30E+00 3.202+00 1.202+01 W-12 L2173-12 04 Be-7 1.10E+01 l.OOE+01 3.40E+01 W-12 L2173-12 04 Ce-141 1.IOE+00 2.50E+00 8.302+00 W-12 L2173-12 04 Ce-144 -2.50E+00 5.90E+00 2.00E+01 W-12 L2173-12 04 Co-57 -I .IOE+00 7.90E-01 2.802+00 W-12 L2173-12 04 Co-58 -3.00-01 1.20E+00 4.30E+00 W-12 L2173-12 04 Co-60 2.30E-01 9.80E-01 3.50E+00 W-12 L2173-12 04 Cr-51 -1.90E+01 1.30E+01 4.60E+01 W-12 L2173-12 04 Cs-134 1.00l2-01 1.102+00 3.90E+00 W-12 L2173-12 04 Cs-137 l.OOE-01 1.10E+00 3.802+00 W-12 L2173-12 04 Fe-59 -3.90E+00 3.202+00 1.20E+01 W-12 L2173-12 04 H-3 2.90E+02 3.90E+02 1.202+03 W-12 L2173-12 04 1-131 -6.80E+00 5.50E+00 2.002+01 W-12 L2173-12 04 K-40 -1.60E+01 1.70E+01 6.00E+01 W-12 L2173-12 04 La- 140 -3.80E+00 3.602+00 1.40E+01 W-12 L2173-12 04 Mn-54 -9.OOE-01 1.00E+00 3.80E+00 W-12 L2173-12 04 Nb-95 -4.10OE+00 1.50E+00 5.90E+00 W-12 L2173-12 04 Ru-103 -1.90E+00 1.30E+00 4.70E+00 W-12 L2173-12 04 Ru-106 -3.00E+00 1.1OE+01 3.80E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-194

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-12 L2173-12 04 Sb-124 -1.1OE+00 2.90E+00 1.1OE+01 W-12 L2173-12 04 Sb-125 -2.OOE+00 2.80E+00 9.90E+00 W-12 L2173-12 04 Se-75 1.20E+00 1.40E+00 4.70E+00 W-12 L2173-12 04 Zn-65 -3.50E+00 2.70E+00 9.90E+00 W-12 L2173-12 04 Zr-95 -6.OOE-01 1.90E+00 6.80E+00 W-13 L2173-13 04 AcTh-228 -3.90E+O0 4.10E+00 1.50E+01 W-13 L2173-13 04 Ag-108m -1.05E+00 7.60E-0I 2.80E+O0 W-13 L2173-13 04 Ag-I lOm -4.OOE-OI 1.40E+00 5.OOE+00 W-13 L2173-13 04 Ba-140 -1.80E+00 3.OOE+00 L.1OE+OI W-13 L2173-13 04 Be-7 -3.OOE+00 9.20E+00 3.20E+01 W-13 L2173-13 04 Ce-141 -4.OOE+00 1.90E+00 6.70E+00 W-13 L2173-13 04 Ce-144 2.60E+00 5.30E+00 1.80E+01 W-13 L2173-13 04 Co-57 -4.40E-0O 7.OOE-01 2.40E+O0 W-13 L2173-13 04 Co-58 4.OOE-01 l.OOE+00 3.60E+00 W-13 L2173-13 04 Co-60 3.OOE-0O 1.lOE+O0 3.90E+O0 W-13 L2173-13 04 Cr-51 2.OOE+O0 1.30E+01 4.50E+01 W-13 L2173-13 04 Cs-134 -1.60E-01 9.70E-01 3.40E+O0 W-13 L2173-13 04 Cs-137 -1.OOE+00 l.lOE+00 3.90E+00 W-13 L2173-13 04 Fe-59 6.20E+00 3.10E+00 9.80E+00 W-13 L2173-13 04 H-3 -2.70E+02 3.90E+02 1.20E+03 W-13 L2173-13 04 1-131 -3.90E+O0 6.10E+00 2.10E+O1 W-13 L2173-13 04 K-40 4.OOE+01 1.70E+01 5.40E+01 W-13 L2173-13 04 La-140 -2.00E+00 3.40E+00 1.30E+01 W-13 L2173-13 04 Mn-54 -1.92E+O0 9.60E-01 3.60E+00 W-13 L2173-13 -04 Nb-95 -2.OOE+00 1.70E+00 6.OOE+00 W-13 L2173-13 04 Ru-103 -1.80E+00 1.30E+00 4.60E+00 W-13 L2173-13 04 Ru-106 2.70E+00 8.70E+00 3.OOE+0O W-13 L2173-13 04 Sb-124 6.OOE-0I 2.60E+00 9.20E+00 W-13 L2173-13 04 Sb-125 -2.90E+00 2.40E+00 8.60E+00 W-13 L2173-13 04 Se-75 2.OOE-0I 1.30E+00 4.40E+00 W-13 L2173-13 04 Zn-65 2.60E+00 2.70E+00 8.70E+O0 W-13 L2173-13 04 Zr-95 1.90E+00 1.80E+00 5.90E+00 W-14 L2173-14 04 AcTh-228 7.40E+00 4.60E+00 1.50E+O1 W-14 L2173-14 04 Ag-108m -5.OOE-02 8.10E-01 2.80E+00 W-14 L2173-14 04 Ag-I lOIm 5.OOE-01 1.30E+O0 4.60E+00 W-14 L2173-14 04 Ba-140 -3.OOE-01 3.OOE+00 1.lOE+0O W-14 L2173-14 04 Be-7 2.32E+01 9.50E+00 3.OOE+01 W-14 L2173-14 04 Ce-141 -5.00E+00 2.20E+00 7.80E+00 W-14 L2173-14 04 Ce-144 5.60E+00 5.70E+00 l.90E+01 W-14 L2173-14 04 Co-57 4.90E-01 7.50E-01 2.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-195

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCilkg)

W-14 L2173-14 04 Co-58 LOOE-01 1.10E+00 4.00E+00 W-14 L2173-14 04 Co-60 1.18E+00 9.70E-01 3.30E+00 W-14 L2173-14 04 Cr-51 -1.10E+01 1.30E+01 4.40E+0I W-14 L2173-14 04 Cs-134 8.OOE-01 L.IOE+00 3.70E+00 W-14 L2173-14 04 Cs-137 5.00E-01 .IOE+00 3.60E+00 W-14 L2173-14 04 Fe-59 -1.50E+00 3.20E+00 L.20E+0I W-14 L2173-14 04 H-3 4.50E+02 3.80E+02 1.IOE+03 W-14 L2173-14 04 1-131 -8.80E+00 6.00E+00 2.10E+01 W-14 L2173-14 04 K-40 6.OOE+00 1.60E+01 5.60E+01 W-14 L2173-14 04 La-140 -4.OOE-0l 3.40E+00 1.30E+01 W-14 L2173-14 04 Mn-54 -2.10E+00 9.90E-01 3.70E+00 W-14 L2173-14 04 Nb-95 -2.30E+00 1.50E+00 5.50E+00 W-14 L2173-14 04 Ru-103 -4.00E+00 L.40E+00 5.10E+00 W-14 L2173-14 04 Ru-106 -4.20E+00 9.30E+00 3.30E+01 W-14 L2173-14 04 Sb-124 -1.20E+00 2.90E+00 1.10E+01 W-14 L2173-14 04 Sb-125 -6.00E+00 2.60E+00 9.30E+00 W-14 L2173-14 04 Se-75 LOOE-01 1.30E+00 4.50E+00 W-14 L2173-14 04 Zn-65 -3.40E+00 2.502+00 9.10E+00 W-14 L2173-14 04 Zr-95 -4.00E-01 L.90E+00 6.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-196

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-1 L2701-01 17 AcTh-228 1.40E+00 6.50E+00 2.30E+01 W-l L2701-01 17 Ag-108m 2.OOE-01 1.30E+00 4.60E+OO W-1 L2701-01 17 Ag-ll0m -1.70E+00 2.60E+00 9.50E+O0 W-1 L2701-01 17 Ba-140 -9.OOE-01 3.30E+00 1.30E+0O W-l L2701-01 17 Be-7 -1.50E+01 1.50E+01 5.60E+01 W-l L2701-01 17 Ce-141 7.00E-01 3.1OE+00 I.OOE+01 W-1 L2701-01 17 Ce-144 -1.60E+0 I.OOE+0 3.60E+01 W-1 L2701-01 17 Co-57 1.40E+00 1.30E+00 4.30E+00 W-1 L2701-01 17 Co-58 4.40E+00 1.80E+00 5.50E+00 W-l L2701-01 17 Co-60 8.00E-01 1.80E+00 6.30E+00 W-1 L2701-01 17 Cr-51 -2.OOE+01 1.70E+01 5.90E+01 W-1 L2701-01 17 Cs-134 3.OOE+00 1.80E+00 6.OOE+00 W-1 L2701-01 17 Cs-137 -2.20E+00 1.70E+00 6.40E+00 W-l L2701-01 17 Fe-59 1.40E+00 5.10E+00 1.90E+OI W-l L2701-01 17 H-3 -4.70E+02 4.30E+02 1.30E+03 W-1 L2701-01 17 1-131 5.OOE-01 3.90E+00 1.40E+OI W-l L2701-01 17 K-40 -3.30E+01 2.30E+01 8.80E+01 W-1 L2701-01 17 La-140 -1.IOE+00 3.80E+00 1.40E+01 W-l L2701-01 17 Mn-54 -I.OOE-01 1.60E+00 5.80E+00 W-l L2701-01 17 Nb-95 -4.OOE-01 1.90E+00 7.OOE+00 W-1 L2701-01 17 Ru-103 3.OOE-01 1.90E+00 6.50E+00 W-l L2701-01 17 Ru-106 -4.OOE+00 1.60E+01 5.70E+01 W-l L2701-01 17 Sb-124 1.80E+00 4.60E+00 1.70E+O1 W-1 L2701-01 17 Sb-125 2.70E+00 4.OOE+00 1.40E+O1 W-1 L2701-01 17 Se-75 I.OOE-01 2.10E+00 7.10E+00 W-1 L2701-01 17 Zn-65 -5.90E+00 3.80E+00 1.50E+01 W-l L2701-01 17 Zr-95 3.OOE+00 2.90E+00 9.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-197

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-2 L2701-02 17 AcTh-228 -3.70E+00 6.40E+00 2.30E+01 W-2 L2701-02 17 Ag-108m 0.OOE+00 l.lOE+00 4.00E+00 W-2 L2701-02 17 Ag-l lOm -1.90E+00 2.00E+00 7.50E+00 W-2 L2701-02 17 Ba-140 O.OOE+00 3.OOE+00 1.10+01 W-2 L2701-02 17 Be-7 7.OOE+00 1.30E+01 4.40E+0O W-2 L2701-02 17 Cc-141 -2.70E+00 2.20E+00 7.60E+00 W-2 L2701-02 17 Ce-144 5.80E+00 7.00E+00 2.40E+01 W-2 L2701-02 17 Co-57 2.60E-01 9.00E-01 3.10E+00 W-2 L2701-02 17 Co-58 1.OOE-01 1.40E+00 5.10E+00 W-2 L2701-02 17 Co-60 -1.80E+00 1.50E+00 6.20E+00 W-2 L2701-02 17 Cr-51 -9.00+00 1.40E+01 4.90E+0O W-2 L2701-02 17 Cs-134 8.00E-01 1.402+00 5.OOE+00 W-2 L2701-02 17 Cs-137 7.00E-01 1.502+00 5.40E+00 W-2 L2701-02 17 Fe-59 -1.60E+00 4.40E+00 1.70E+01 W-2 L2701-02 17 H-3 -5.20E+02 4.30E+02 1.40E+03 W-2 L2701-02 17 1-131 1.90E+00 3.60E+00 1.20E+01 W-2 L2701-02 17 K-40 9.00E+00 2.50E+01 8.80E+01 W-2 L2701-02 17 La-140 O.OOE+00 3.50E+00 1.30E+01 W-2 L2701-02 17 Mn-54 -2.00E-01 1.502+00 5.50E+00 W-2 L2701-02 17 Nb-95 4.OOE-0O 2.00E+00 7.10E+00 W-2 L2701-02 17 Ru-103 1.60E+00 1.602+00 5.40E+00 W-2 L2701-02 17 Ru-106 3.00E+00 1.40E+01 4.902+01 W-2 L2701-02 17 Sb-124 -2.90E3+00 4.00E+00 1.60E+01 W-2 L2701-02 17 Sb-125 6.70E+00 3.30E+00 1.10E+01 W-2 L2701-02 17 Se-75 -2.00E-01 1.70E+00 5.90E+00 W-2 L2701-02 17 Zn-65 -2. 1OE+00 3.30E+00 1.20E+01 W-2 L2701-02 17 Zr-95 -1.30E+00 2.60E+00 9.50E+00 W-3 L2701-03 17 AcTh-228 5.00E-01 6.60E+00 2.30E+01 W-3 L2701-03 17 Ag-108m -1.90E+00 1.20E+00 4.20E+00 W-3 L2701-03 17 Ag-l lOm -3.80E+00 2.00E+00 7.70E+00 W-3 L2701-03 17 Ba-140 2.00E+00 3.40E+00 1.20E+01 W-3 L2701-03 17 Be-7 -1.90E+01 1.50E+01 5.30E+0O W-3 L2701-03 17 Ce-141 -8.00E-01 2.80E+00 9.50E+00 W-3 L2701-03 17 Ce-144 -9.1OE+00 9.002+00 3.10E+01 W-3 L2701-03 17 Co-57 -1 .OOE-0O 1.20E+00 3.90E+00 W-3 L2701-03 17 Co-58 -L.OOE-01 1.602+00 5.60E+00 W-3 L2701-03 17 Co-60 2.00E-01 1.30E+00 4.70E+00 W-3 L2701-03 17 Cr-51 4.OOE+00 1.502+01 5.10E+01 W-3 L2701-03 17 Cs- 134 -1.00+00 1.60E+00 5.70E+00 W-3 L270i-03 17 Cs-137 -5.00E-01 1.50E+00 5.20E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-198

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-3 L2701-03 17 Fe-59 -6.30E+00 4.501E+00 I1.80E+01 W-3 L2701-03 17 H-3 0.OOE2+00 4.40E+02 1 .40E+03 W-3 L2701-03 17 1-131 3.50E+00 4.40E+00 1 .501+01 W-3 L2701-03 17 K40 4.60E+01 1.90E+01 5.901E+01 W-3 L2701-03 17 La-140 2.20E+00 3.90E+00 1.40E3+01 W-3 L2701-03 17 Mn-54 2.60E+00 1.60E+00 5.30E+00 W-3 L2701-03 17 Nb-95 2.20E+00 1.70E+00 5.80E+00 W-3 L2701-03 17 Ru-103 -1 .90E+O0 I1.70E+00 6.20E+00 W-3 L2701-03 17 Ru-106 2.OOE+01 1.3013-01 4.401E+01 W-3 L2701-03 17 Sb-124 3.OOE+00 3.50E+00 I1.20E+01 W-3 L2701-03 17 Sb-125 -2.80E+00 3.603+O00 I1.30E+01 W-3 L2701-03 17 Se-75 8.001E-01 I1.901E+00 6.40E+00 W-3 L2701-03 17 Zn-65 1.32E+01 5.301E+00 I1.70E+01 W-3 L2701-03 17 Zr-95 -2.OOE-i00 2.60E3+00 9.401E+00 W-4 L2701-04 17 Acih-228 2.901E+00 5.50E+00 1.90E+01 W-4 L2701-04 17 Ag-108m -1. 1OE+00 1.1OE+00 4.001E+00 W4 L2701-04 17 Ag-I lOm -1 .70E+00 1.90E+00 6.90E+00 W4 L2701-04 17 Ba-140 4.OOE-01 2.301E+00 8.40E+00 W-4 L2701-04 17 Be-7 -4.OOE+00 1.IOE+01 3.90E+01 W-4 L2701-04 17 Ce-141 5.00OE-01' 2.001E+00 6.80E+00 W-4 L2701-04 17 Cc-144 -6.1IOE+00 7.OOE+00 2.501E+01 W-4 L2701-04 17 Co-57 -1. IOE-01 9.201E-01 3.20E+00 W4 L2701-04 17 Co-58 -2.30E+00 1.30E+00 5.10E+00 W-4 L2701-04 17 Co-60 -9.001E-01 1.60E+00 5.80E3+00 W4 L2701-04 17 Cr-51 -1.40E+01 I1.30E+01 4.801E+01 W-4 L2701-04 17 Cs-134 1.1OE+00 1.20E+00 4.101E+00 W-4 L2701-04 17 Cs-137 -6.OOE-01 1.40E+O0 5.20E-e00 W4 L2701-04 17 Fe-59 4.00OE-01 4.OOE+00 1.40E+01 W4 L2701-04 17 H-3 5.OOE+02 4.50E+02 1.40E+03 W4 L2701-04 17 1-131 2.201E+00 3.20E+O0 1.IOE+01 W4 L2701-04 17 K40 1.401E+01 2.001E+01 6.801E+01 W4 L2701-04 17 La-140 4.001E-01 2.60E+00 9.70E+00 W4 L2701 -04 17 Mn-54 -3.101+00 1.20E+00 4.80E+00 W4 L2701-04 17 Nb-95 -4.80E+00 I1.701E+00 6.60E+00 W4 L2701-04 17 Ru-103 -9.OOE-01 I1.30E+00 4.70E+00 W4 L2701-04 17 Ru-106 -2.70E+01 I1.30E+01 4.80E+01 W4 L2701-04 17 Sb-124 -5.OOE-01 3. I OE+00 I1.20E+01 W4 L2701-04 17 Sb-125 -3.20E+00 3.40E3+00 I1.20E+01 W4 L2701-04 17 Se-75 1.1OE+00 I1.60E+00 5.50E+00 W4 L2701-04 17 Zn-65 -7.OOE-01 2.70E+00 9.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-199

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-4 L2701-04 17 Zr-95 -6.OOE-0 1.90E+00 7.10E+00 W-5 L2701-05 17 AcTh-228 2.10E+00 3.80E+00 1.30E+01 W-5 L2701-05 17 Ag-108m 2.80E-01 6.20E-01 2.10E+00 W-5 L2701-05 17 Ag-i lOnm 1.OOE+O0 9.80E-01 3.30E+00 W-5 L2701-05 17 Ba-140 -2.60E+00 2.OOE+00 7.40E+00 W-5 L2701-05 17 Be-7 5.70E+00 6.80E+00 2.30E+01 W-5 L2701-05 17 Ce-141 -7.00E-01 2.20E+00 7.40E+00 W-5 L2701-05 17 Ce-144 0.002+00 4.20E+00 1.40E+01 W-5 L2701-05 17 Co-57 3.80E-01 5.40E-01 1.80E+00 W-S L2701-05 17 Co-58 2.1OE-01 7.20E-01 2.50E+00 W-5 L2701-05 17 Co-60 8.80E-01 7.60E-01 2.60E+00 W-5 L2701-05 17 Cr-51 7.60E+00 8.90E+00 3.OOE+01 W-5 L2701-05 17 Cs-134 -4.60E-01 6.902-01 2.502+00 W-5 L2701-05 17 Cs-137 -1.26E+00 7.70E-01 2.802+00 W-5 L2701-05 17 Fe-59 I.OOE+00 2.40E+00 8.40E+00 W-5 L2701-05 17 H-3 -1.10+02 4.40E+02 1.40E+03 W-5 L2701-05 17 1-131 -7.00E-01 3.50E+00 1.20E+01 W-5 L2701-05 17 K-40 6.50E+01 1.402+01 4.302+01 W-5 L2701-05 17 La-140 -3.OOE+00 2.30E+00 8.50E+00 W-5 L2701-05 17 Mn-54 -2.31E+00 7.50E-01 2.80E+00 W-5 L2701-05 17 Nb-95 -4.00E-02 9.402-01 3.302+00 W-5 L2701-05 17 Ru-103 -3.16E+00 8.602-01 3.20E+00 W-5 L2701-05 17 Ru-106 -7.80E+00 7.30E+00 2.60E+01 W-5 L2701-05 17 Sb-124 2.50E+00 1.902+00 6.20E+00 W-5 L2701-05 17 Sb-125 O.OOE+00 1.90E+00 6.60E+00 W-5 L2701-05 17 Se-75 -1.51E+00 9.70E-01 3.40E+00 W-5 L2701-05 17 Zn-65 1.30E+00 1.50E+00 5.20E+00 W-5 L2701-05 17 Zr-95 9.002-01 1.40E+00 4.70E+00 W-6 L2701-06 17 AcTh-228 5.102+00 2.80E+00 9.20E+00 W-6 L2701-06 17 Ag-108m 4.10E-01 6.20E-01 2.10E+00 W-6 L2701-06 17 Ag-I1lm -2.004-01 1.10+00 3.70E+00 W-6 L2701-06 . 17 Ba-140 -3.60E+00 2.00E+00 7.50E+00 W-6 L2701-06 17 Be-7 1.75E+01 6.90E+00 2.20E+01 W-6 L2701-06 17 Ce-141 1.70E+00 1.80E+00 6.002+00 W-6 L2701-06 17 Cc-144 -2.00E+00 4.402+00 1.502+01 W-6 L2701-06 17 Co-57 -1.48E+00 5.60E-01 1.90E+00 W-6 L2701-06 17 Co-58 -7.60E-01 7.802-01 2.80E+00 W-6 L2701-06 17 Co-60 3.00E-02 7.402-01 2.60E+00 W-6 L2701-06 17 Cr-51 -1.62E+01 8.902+00 3.10E+01 W-6 L2701-06 17 Cs-134 1.75E+00 8.00E-01 2.60E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-200

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-6 L2701-06 17 Cs-137 7.20E-01 7.50E-01 2.50E+00 W-6 L2701-06 17 Fe-59 -2.00E-01 2.10E+00 7.60E+00 W-6 L2701-06 17 H-3 3.10E+02 4.40E+02 1.302+03 W-6 L2701-06 17 1-131 2.30E+00 3.60E+00 1.202+01 W-6 L2701-06 17 K-40 5.40E+0O 1.30E+01 4.00E+01 W-6 L2701-06 17 La-140 -4.101+.00 2.30E+00 8.60E+00 W-6 L2701-06 17 Mn-54 -7.10E-01 7.60E-01 2.70E+00 W-6 L2701-06 17 Nb-95 3.00E-01 1.50E+00 5.10E+00 W-6 L2701-06 17 Ru-103 -6.40E-0O 8.90E-01 3.10E+00 W-6 L2701-06 17 Ru-106 -1.20E+00 7.30E+00 2.50E+01 W-6 L2701-06 17 Sb-124 3.70E+00 2.20E+00 7.302+00 W-6 L2701-06 17 Sb-125 -1.90E+00 1.90E+00 6.50E+00 W-6 L2701-06 17 Se-75 -5.80E-0O 9.70E-01 3.30E+00 W-6 L2701-06 17 Zn-65 2.90E+00 2.50E+00 8.102+00 W-6 L2701-06 17 Zr-95 -1.OOE-01 1.40E+00 4.80E+00 W-7 L2701-07 17 AcTh-228 4.30E+00 2.50E+00 8.20E+00 W-7 L2701-07 17 Ag-108m 3.00E-02 5.60E-01 1.902+00 W-7 L2701-07 17 Ag-Ilbm 5.00E-01 1.002+00 3.40E+00 W-7 L2701-07 17 Ba-140 3.50E+00 2.10E+00 6.70E+00 W-7 L2701-07 17 Be-7 1.39E+01 6.40E+00 2.10E+01 W-7 L2701-07 17 Cc-141 -3.00E-01 1.70E+00 5.80E+00 W-7 L2701-07 17 Cc-144 7.OOE-01 3.70E+00 1.20E+01 W-7 L2701-07 17 Co-57 1.20E-01 6.80E-01 2.30E+00 W-7 L2701-07 17 Co-58 -9.60E-01 7.20E-01 2.60E+00 W-7 L2701-07 17 Co-60 1.96E+00 7.70E-01 2.402+00 W-7 L2701-07 17 Cr-51 2.60E+00 8.60E+00 2.90E+01 W-7 L2701-07 17 Cs-134 7.40E-0O 7.10E-01 2.40E+00 W-7 L2701-07 17 Cs-137 -1.30E+00 7.20E-01 2.60E+00 W-7 L2701-07 17 Fe-59 -9.00E-01 2.30E+00 8.30E+00 W-7 L270i -07 17 H-3 -1.50E+02 4.40E+02 1.40E+03 W-7 L2701-07 17 1-131 6.70E+00 4.90E+00 1.602+01 W-7 L2701-07 17 K-40 -1.20E+01 1.30E+01 4.60E+01 W-7 L2701-07 17 La-140 4.OOE+00 2.40E+00 7.70E+00 W-7 L2701-07 17 Mn-54 -6.30E-01 6.30E-01 2.30E+00 W-7 L2701-07 17 Nb-95 2.OOE-01 1.40E+00 4.70E+00 W-7 L2701-07 17 Ru-103 -1.81E+00 8.70E-01 3.10E+00 W-7 L2701-07 17 Ru-106 -7.10E+00 6.70E+00 2.40E+01 W-7 L2701-07 17 Sb-124 9.00E-01 1.90E+00 6.60E+00 W-7 L2701-07 17 Sb-125 l.OOE-01 1.70E+00 5.70E+00 W-7 L2701-07 17 Se-75 -3.60E-01 8.00E-01 2.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-201

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-7 L2701-07 17 Zn-65 - LI. 0OE+00 1.60E3+00 5.50E+00 W-7 L2701-07 17 Zr-95 -I.OOE+00 I1.40E+00 5.OOE+00 W-8 L2701-08 17 Acih-228 -1.90E+00 4.OOE1e-00 1.401E+01 W-8 L2701-08 17 Ag-108m -1 .941E.00 7.001E-01 2.60E3+00 W-8 L2701-08 17 Ag-I lOm -2.OOE-01 I1.20E+00 4.401E+00 W-8 L2701-08 17 Ba-140 -2.50E+00 2.601E+00 9.90E+00 W-8 L2701-08 17 Be-7 0.OOE+00 8.50E-,00 2.90E+01 W-8 L2701-08 17 Ce-141 -4.5S1E+00 1.90E+00 6.80E+00 W-8 L2701-08 17 Ce-144 -4.IOE+00 4.601E+00 1.60E+01 W-8 L2701-08 17 Co-57 -3.90E-01 7.701E-01 2.60E+00 Wv-8 L2701-08 17 Co-58 -1 .83E-i00 8.60E3-01 3.301E+00 W-8 L2701-08 17 Co-60 -5.00OE-01 9.20E-01 3.30E+00 W-.8 L2701-08 17 Cr-51 8.OOE+00 1.IOE3+01 3.70E+01 Wv-8 L2701-08 17 Cs-134 1.141E+00 8.30E3-01 2.70E+00 Wv-s L2701-08 17 Cs-137 5.101E-01 8.901E-01 3.OOE+00 Wv-8 L2701-08 17 Fe-59 -4.0013+00 3. l0E+00 I1.20E+01 Wv-8 L2701-08 17 H-3 4.40E+02 4.20E+02 1.30E+03 W-8 L2701-08 17 1-131 2.301E+00 5.901E+00 2.001E+01 Wv-8 L2701-08 17 K-40 -1.90E+01 .1.50E+01 5.40E+01 Wv-8 L2701-08 17 La-140 -2.90E+00 3.OOE+00 l.IOE+01 W-8 L2701-08 17 Mn-54 2.60E-01 7.701E-01 2.70E+00 W-8 L2701-08 17 Nb-95 I1.70E+00 I1.20E1e-00 3.90E-e00 Wv-8 L2701-08 17 Ru-103 1.OOE3+00 1.IOE+00 3.80E-t00 W-8 L2701-08 17 Ru-106 3. 1O1+O00 8.501E+00 2.90E+01 W-8 L2701-08 17 Sb-124 1.1OE3+00 2.40E+00 8.30E+00 W-8 L2701-08 17 Sb-125 -1 .50E+00 2.20E+00 7.80E+00

'v.8 L2701 08 17 Se-75 -9.701E-01 9.60E3-01 3.40E+00 Wv-8 L2701-08 17 Zn-65 1.OOE+00 I1.90E+O0 6.50E-400 Wv-s L2701-08 17 Zr-95 .-4.60E+00 I1.801E+00 6.70E+O0 W-9 L2701-09 17 AcTh-228 8.OOE3-01 7.60E1,-00 2.70E+01 Wv-9 L2701-09 17 Ag- 108m -5.0OE-01 I1.401E+00 5.10E+00 W-9 L2701-09 17 Ag-i lOm -1.60E+00 2.70E+00 l.OOE+i01 Wv.9 L2701-09 17 Ba-140 0.OOE3+00 2.501E+00 9.60E+00 Wv-9 L2701-09 17 Be-7 1.OOE1e-00 1.30E+01 4.701E+01 Wv.9 L2701-09 17 Cc-141 -2.70E+i00 2.40E+00 8.50E+00 W-9 L2701-09 17 Ce-144 -4.30E+00 8.20E+00 2.90E+01 Wv-9 L2701-09 17 Co-57 -5.001E-01 I .OOE+00 3.60E+O00

'v.9 L2701-09 17 Co-58 2.201E+00 I1.70E1i-00 5.70E+00 W-9 L2701-09 17 Co-60 6.00OE-01 2.10OE+00 7.60E-e00 Wv-9 L2701-09 17 Cr-51 -1.50E+01 I1.50E+01 5.40E3+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-202

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-9 L2701-09 17 Cs-134 -1.70E+00 1.80E+00 6.80E+00 W-9 L2701-09 17 Cs-137 1.20E+00 1.80E+00 6.30E+00 W-9 L2701-09 17 Fe-59 -3.20E+00 5.90E+00 2.20E+0O W-9 L2701-09 17 H-3 5.OOE+02 4.20E+02 1.30E+03 W-9 L2701-09 17 1-131 -l.IOE+00 3.OOE+00 1.1OE+01 W-9 L2701-09 17 K-40 -3.OOE+O0 2.70E+01 9.70E+I01 W-9 L2701-09 17 La-140 O.OOE+00 2.80E+00 I.1OE+01 W-9 L2701-09 17 Mn-54 2.OOE-01 1.70E+00 6.20E+00 W-9 L2701-09 17 Nb-95 -1.20E+00 1.80E+00 6.80E+00 W-9 L2701-09 17 Ru-103 -1.OOE+00 1.70E+00 6.20E+00 w-9 L2701-09 17 Ru-106 3.OOE+00 1.50E+01 5.40E+01 w-9 L2701-09 17 Sb-124 -5.40E+00 4.OOE+00 1.70E+0O w-9 L2701-09 17 Sb-125 -3.20E+00 4.30E+00 1.60E+OI W-9 L2701-09 17 Se-75 -1.40E+00 l.90E+00 6.70E+00 W-9 L2701-09 17 Zn-65 -1.60E+00 3.80E+00 1.40E+0O W-9 L2701-09 17 Zr-95 -2.40E+00 2.80E+00 I.IOE+0O W-10 L2701-10 17 AcTh-228 2.OOE+00 5.50E+00 1.90E+01 W-10 L2701-10 17 Ag-108m 1.60E+00 1.IOE+00 3.70E+00 W-10 L2701-10 17 Ag-lOrm 2.60E+00 1.70E+00 5.80E+00 W-10 L2701-10 17 Ba-140 l.OOE+00 2.20E+00 7.80E+00 W-10 L2701-10 17 Be-7 7.OOE+00 l.IOE+0 3.70E+01 W-10 L2701-10 17 Cc-141 4.40E+00 1.90E+00 6.30E+00 W-10 L2701 -10 17 Ce-144 1.80E+00 7.20E+00 2.50E+01 W-10 L2701-10 17 Co-57 9.50E-01 9.20E-01 3.10E+00 W-10 L2701-10 17 Co-58 7.OOE-01 1.20E+00 4.20E+00 W-10 L2701-10 17 Co-60 1.50E+00 1.40E+00 4.60E+O0 W-10 L2701-10 17 Cr-51 -9.OOE+00 1.30E+01 4.50E+01 W-10 L2701-10 17 Cs-134 3.OOE-01 1.20E+00 4.20E+00 W-10 L2701-10 17 Cs-137 -4.OOE-01 1.50E+00 5.20E+00 W-10 L2701-10 17 Fe-59 -4.OOE-01 3.70E+00 1.40E+0O W-10 L2701-10 17 H-3 6.90E+02 4.30E+02 1.30E+03 W-10 L2701-10 17 1-131 1.60E+00 2.60E+00 9.OOE+00 W-10 L2701-10 17 K-40 1.44E+0O 9.50E+00 3.20E+01 W-10 L2701-10 17 La-140 1.1OE+00 2.50E+00 8.90E+00 W-10 L2701-10 17 Mn-54 -7.OOE-01 1.30E+00 4.90E+00 W-10 L2701-10 17 Nb-95 O.OOE+00 1.50E+00 5.40E+00 W-10 L2701-10 17 Ru-103 -9.OOE-0O 1.50E+00 5.50E+00 W-10 L2701-10 17 Ru-106 -2.70E+0O 1.30E+01 5.OOE+01 W-10 L2701-10 17 Sb-124 -2.60E+00 2.50E+00 1.IOE+01 W-10 L2701-10 17 Sb-125 3.40E+00 3.30E+00 1.IOE+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-203

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-Io L2701-10 17 Se-75 2.70E+00 1.70E+OO 5.50E+00 W-1o L2701-10 17 Zn-65 -4.1OE+00 2.80E+OO 1.lOE+O I W-10 L2701-10 17 Zr-95 -2.40E+00 2.OOE+00 7.80E+00 WI'1 L2701-11 17 AcTh-228 9.IOE+00 5.IOE+00 1.70E+01 L2701-11 17 Ag- 108m 3.OOE-01 l.OOE+OO 3.60E+00 W-II L2701-11 17 Ag-I lOm 4.OOE-01 1.70E+00 6. 10E+00 W-11 L2701-11 17 Ba-140 2.80E+00 2.70E+OO 9.40E+0O W-1I w-1I L2701-11 17 Be-7 7.OOE+O0 1.20E+01 4.OOE+01 W-11 L2701-11 17 Ce-141 4.OOE-01 2.40E+00 8.1OE+OO w-II L2701-11 17 Ce-144 -7.OOE-01 7.50E+00 2.60E+01 W-1 L2701-11 17 Co-57 7.OOE-01 9.80E-O1 3.30E+00 W-'I L2701-11 17 Co-58 -9.OOE-01 1.30E+00 5.OOE+00 W-1 L2701-11 17 Co-60 1.60E+0O 1.30E+00 4.50E+OO W-lI L2701-11 17 Cr-51 -4.OOE+00 1.40E+O1 4.80E+01 W-11 L2701-11 17 Cs- 134 6.OOE-01 1.40E+00 5.OOE+00 W-11 L2701-11 17 Cs-137 -5.OOE-01 1.20E+00 4.50E+00 W-11 L2701-11 17 Fe-59 7.OOE-01 3.80E+00 1.40E+I01 W-11 L2701-11 17 H-3 2.OOE+02 4.20E+02 1.30E+03 W-11 L2701-11 17 1-131 8.OOE-01 4.OOE+00 1.40E+01 W-1l L2701-1 1 17 K-40 -1.IOE+I01 1.90E+01 7.OOE+01 W-ll L2701-1 1 17 La-140 3.20E+00 3.20E+00 1.lOE+01 W-1l L2701-1 I 17 Mn-54 -4.OOE-01 1.30E+00 4.80E+OO W-1l L2701-11 17 Nb-95 -2.OOE-O1 1.60E+O0 5.70E+OO W-ll L2701-11 17 Ru-103 -4.50E+00 1.40E+OO 5.40E+O0 W-ll L2701-11 17 Ru-106 9.OOE+OO 1.20E+01 4.20E+01 W-ll L2701-11 17 Sb-124 5.40E+00 3.60E+OO 1.20E+01 W-ll L2701-11 17 Sb- 125 4.50E+00 3.30E+00 1.1OE+01 -

W-ll W-ll L2701-11 17 Se-75 8.OOE-01 1.60E+00 5.50E+OO W-1l L2701-11 17 Zn-65 -4.OOE-01 2.80E+00 l.OOE+I01 L2701-1 I 17 Zr-95 -7.OOE-01 2.20E+OO 8.OOE+OO W-12 L2701-12 17 AcTh-228 2.20E+00 4.50E+00 1.60E+O1 W-12 L2701-12 17 Ag-108m -1.70E-01 9.40E-01 3.30E+O0 W-12 L2701-12 17 Ag- lOnm -6.OOE-01 1.90E+O0 6.70E+00 W-12 L2701-12 17 Ba-140 1.50E+O0 2.50E+00 9.OOE+O0 W-12 L2701-12 17 Be-7 7.OOE+00 1.lOE+O1 3.70E+01 W-12 L2701-12 17 Ce-141 1.90E+00 2.20E+O0 7.40E+00 W-12 L2701-12 17 Cc-144 3.30E+00 7.40E+00 2.50E+01 W-12 L2701-12 17 Co-57 1.45E+OO 9.40E-01 3. 1OE+0O W-12 L2701-12 17 Co-58 -I.OOE+00 1.20E+0O 4.60E+-O0 W-12 L2701-12 17 Co-60 -2.90E+OO 1.30E+OO 5.30E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-204

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-12 L2701-12 17 Cr-51 3.OOE+00 1.30E+01 4.50E+01 W-12 L2701-12 17 Cs-134 -1.00E+00 1.40E+00 5.20E+00 W-12 L2701-12 17 Cs-137 3.00E-01 1.30E+00 4.70E+00 W-12 L2701-12 17 Fe-59 -5.30E+00 3.40E+00 1.40E+01 W-12 L2701-12 17 H-3 -3.OOE+01 4.20E+02 1.30E+03 W-12 L2701-12 17 1-131 2.60E+00 3.70E+00 1.30E+01 W-12 L2701-12 17 K-40 1.10E+01 2.00E+01 7.00E+01 W-12 L2701-12 17 La-140 1.80E+00 2.90E+00 l.OOE+01 W-12 L2701-12 17 Mn-54 6.OOE-01 1.20E+00 4.20E+00 W-12 L2701-12 17 Nb-95 3.40E+00 1.60E+00 5.10E+00 W-12 L2701-12 17 Ru-103 -1.60E+00 1.30E+00 4.90E+00 W-12 L2701-12 17 Ru-106 l.OOE+00 1.20E+01 4.10E+01 W-12 L2701-12 17 Sb-124 -7.00E+00 3.60E+00 1.50E+01 W-12 L2701-12 17 Sb-125 -8.003-01 3.20E+00 1.10E+01 W-12 L2701-12 17 Se-75 1.10E+00 1.70E+00 5.70E+00 W-12 L2701-12 17 Zn-65 l.OOE-01 3.90E+00 1.40E+01 W-12 L2701-12 17 Zr-95 1.lOE+00 2.10E+00 7.50E+00 W-13 L2701-13 17 AcTh-228 -3.80E+00 5.20E+00 1.90E+01 W-13 L2701-13 17 Ag-108m 1.60E+00 1.10E+00 3.60E+00 W-13 L2701-13 17 Ag-I lOm O.OOE+00 1.80E+00 6.30E+00 W-13 L2701-13 17 Ba-140 3.20E+00 2.10E+00 6.90E+00 W-13 L2701-13 17 Be-7 l.OOE+00 1.10E+01 3.80E+01 W-13 L2701.13 17 Ce-141 1.60E+00 1.90E+00 6.40E+00 W-13 L2701-13 17 Ce-144 3.40E+00 7.20E+00 2.40E+01 W-13 L2701-13 17 Co-57 1.62E+00 9.50E-01 3.10E+00 W-13 L2701-13 17 Co-58 3.00E-01 1.30E+00 4.60E+00 W-13 L2701-13 17 Co-60 -3.OOE-01 1.30E+00 5.00E+00 W-13 L2701-13 17 Cr-51 -2.90E+0O 1.30E+01 4.70E+01 W-13 L2701-13 17 Cs-134 1.10E+00 1.40E+00 4.70E+00 W-13 L2701-13 17 Cs-137 -l.OOE-01 1.30E+00 4.80E+00 W-13 L2701-13 17 Fe-59 -6.20E+00 3.70E+00 1.50E+01 W-13 L2701-13 17 H-3 1.20E+03 4.30E+02 1.30E+03 W-13 L2701-13 17 1-131 -2.20E+00 2.40E+00 8.60E+00 W-13 L2701-13 17 K-40 5.60E+01 2.30E+01 7.20E+01 W-13 L2701-13 17 La-140 3.60E+00 2.40E+00 7.90E+00 W-13 L2701-13 17 Mn-54 1.OOE+00 1.30E+00 4.30E+00 W-13 L2701-13 17 Nb-95 -3.40E+O0 1.60E+00 6.30E+00 W-13 L2701-13 17 Ru-103 2.00E-01 1.50E+00 5.30E+00 W-13 L2701-13 17 Ru-106 -6.OOE+00 1.20E+0I 4.50E+01 W-13 L2701-13 17 Sb-124 5.OOE-01 3.40E+00 1.30E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-205

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-13 L2701-13 17 Sb-125 3.40E+00 3.50E+00 1.20E+01 W-13 L2701-13 17 Se-75 -7.00E-01 1.70E+00 6.1OE+00 W-13 L2701-13 17 Zn-65 -3.OOE-01 3.50E+00 1.30E+01 W-13 L2701-13 17 Zr-95 -2. 1OE+00 2.20E+00 8.30E+00 W-14 L2701-14 17 AcTh-228 5.90E+00 6.00E+00 2.00E+01 W-14 L2701-14 17 Ag-108m -1.90E+00 1.1OE+00 4.10E+00 W-14 L2701-14 17 Ag-llOm 4.OOE-01 1.60E+00 5.60E+00 W-14 L2701-14 17 Ba-140 -3.10E+00 2.20E+00 8.80E+00 W-14 L2701-14 17 Be-7 -1.40E+01 1.OOE+01 3.90E+01 W-14 L2701-14 17 Ce-141 -1.00E+00 2.20E+00 7.60E+00 W-14 L2701-14 17 Ce-144 5.10E+00 7.40E+00 2.50E+01 W-14 L2701-14 17 Co-57 1.91E+00 9.70E-01 3.10E+00 W-14 L2701-14 17 Co-58 -4.00E-01 1.50E+00 5.40E+00 W-14 L2701-14 17 Co-60 4.OOE-O1 1.40E+00 5.10E+00 W-14 L2701-14 17 Cr-51 -1.40E+O1 1.20E+01 4.40E+01 W-14 L2701-14 17 Cs-134 4.OOE+O0 1.40E+00 4.20E+00 W-14 L2701-14 17 Cs-137 6.00-E-1 1.40E+00 4.70E+00 W-14 L2701-14 17 Fe-59 1.50E+00 3.10E+00 1.1OE+01 W-14 L2701-14 17 H-3 8.70E+02 4.20E+02 1.20E+03 W-14 L2701-14 17 1-131 4.OOE-01 2.40E+00 8.30E+00 W-14 L2701-14 17 K-40 -1.OOE+01 2.10E+01 7.50E+01 W-14 L2701-14 17 La-140 -3.60E+O0 2.60E+00 1.OOE+01 W-14 L2701-14 17 Mn-54 1.80E+00 1.40E+00 4.70E+00 W-14 L2701-14 17 Nb-95 -2.80E+00 1.40E+00 5.60E+00 W-14 L2701 -14 17 Ru-103 -1.50E+00 1.30E+00 4.70E+00 W-14 L2701-14 17 Ru-106 3.00E+00 1.30E+01 4.70E+01 W-14 L2701-14 17 Sb- 124 4.00E-0O 2.70E+00 1.OOE+01 -

W-14 L2701-14 17 Sb- 125 1.1OE+00 3.50E+00 1.20E+01 W-14 L2701-14 17 Se-75 2.30E+00 1.70E+00 5.70E+00 W-14 L2701-14 17 Zn-65 -6.30E+00 3.20E+00 1.20E+01 W-14 L2701-14 17 Zr-95 5.50E+00 2.20E+00 6.90E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-206

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-I U3459-01 30 Aclh-228 1.60E+00 5.40E+00 I.90E+01 W-1 U3459-01 30 Ag-108m -3.60E-01 9.60E-01 3.40E+00 W-I U3459-01 30 Ag-i lOm 4.OOE-01 1.80E+00 6.30E+00 W-I U3459-01 30 Ba-140 -4.OOE-01 3.10E+00 1.IOE+01 WI1 U2459-01 30 Be-7 I1.70E+01 l.lOE+01 3.70E+01 W-1 U3459-01 30 Ce-141 1.40E+00 I.90E+00 6.50E+00 W.I L3459-01 30 Ce-144 -3.70E+00 6.OOE+00 2.1OE+01 WI1 U3459-01 30 Co-57 -2.60E-01 7.50E-01 2.60E+00 W-1 U3459-01 30 Co-58 0.OOE+00 1.30E+00 4.50E+00 W-I L3459-01 30 Co-60 -1 .OOE+00 1.40E+00 5.30E+00 W-1 U3459-01 30 Cr-51 1.OOE+01 1.30E+01 4.30E+01 W-1 U3459-01 30 Cs-134 2.00OE-01 1.20E+00 4.20E+00 W-1 U3459-01 30 Cs-137 4.OOE-01 1.lOE+00 4.OOE+00 W-l W3459-01 30 Fe-59 1.60E-e00 4.30E+00 1.50E+01 W-1 U2459-01 30 H-3 -6.OOE+01 3.90E+02 1.20E+03

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-207

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg) w-1 L3459-01 30 1-131 -2.OOE-01 3.70E+00 1.30E-i01 W- L3459-01 30 K-40 2.10E+01 2. 101+0 I 7.IOE+01 W-1 L3459-01 30 La-140 -5.00E-01 3.501E+00 I1.30E+01 W-I L3459-01 30 Mn-54 -5.00E3-01 I1.301E+00 4.501E+00 w-1 L3459-01 30 Nb-95 -1.6013-00 2. IOE-,.00 7.701E+00 W- L3459-01 30 Ru-103 -4.001E-01 I1.30E3+00 4.60E3+00 W-1 L3459-01 30 Ru-106 -7.OOE+00 1.20E+01 4.201E+01 w-l U3459-01 30 Sb-124 5.OOE-01 2.70E+00 1.OOE3+01 w-1 L3459-01 30 Sb-125 -3.70E+00 2.901E+00 1.OOE1i.01 W-. L3459-01 30 Se-75 -6.001E-01 1.50E3+00 5.001E+00 J

w-1 L3459-01 30 Zn-65 -4.OOE+00 3.40E3+00 I1.30E+01 w-1 L3459-01 30 Zr-95 -1.OOE3-01 2.30E+00 8.10E-i00 W-2 L3459-02 30 AcTh-228 4.20E+00 5.20E+00 I1.701E+01 W-2 L3459-02 30 Ag-108m 4.80E-01 7.70E-01 2.60E+00 W-2 L3459-02 30 Ag-I lOm 1.601E+00 1.40E-,.00 4.60E+00 W-2 L3459-02 30 Ba-140 1.70E3+00 2.80E+00 9.801E+00 W-2 L3459-02 30 Be-7 -1.69E+01 9.001E+00 3.30E+01 W-2 L3459-02 30 Ce-141 -4.00OE+00 2.40E3+00 8.301E+00 W-2 L3459-02 30 Ce-144 7.201E+00 4.901E+00 1.60E1e-01 W-2 L3459-02 30 Co-57 -7.701E-01 6.20E-01 2. 101+00 W-2 L3459-02 30 Co-58 -2.OOE-01 9.801E-01 3.501E+00 W-2 U3459-02 30 Co-60 -4.001E-01 1.20E3+00 4.30E-,.00 W-2 L3459-02 30 Cr-51 -1.40E+01 1.OOE3+01 3.601E+01 W-2 L3459-02 30 Cs-134 5.00OE-01 1.20E-i00 4.00OE+00 W-2 L3459-02 30 Cs-137 5.00OE-01 1.OOE-,00 3.60E+00 W-2 L3459-02 30 Fe-59 9.001E-01 2.30E-i.00 7.901E+00 W-2 L3459-02 30 H-3 1.50E+02 3.901E+02 I1.201E+03 W-2 L3459-02 30 1-131 -3.40E+00 3. 101E+00 1.1OE+01 W-2 L3459-02 30 K-40 8.OOE+00 1.801E+01 6. IOE+01 W-2 L3459-02 30 La-140 2.001E+00 3.301E+00 1.1OE+01 W-2 L3459-02 30 Mn-54 -3.OOE-01 1.OOE3+00 3.601E+00 W-2 L3459-02 30 Nb-95 -7.OOE-01 I1.20E+00 4.40E+00 W-2 L3459-02 30 Ru-103 -1.30E+00 I .1OE3+00 3.801E+00 W-2 L3459-02 30 Ru-106 I1.231E+01 9.80E1i-00 3.30E+01 W-2 L3459-02 30 Sb-124 -1. 1OE+00 3.OOE-,00 1.101+0 I W-2 L3459-02 30 Sb- 125 -3.901E+00 2.50E3+00 9.10E-,00 W-2 L3459-02 30 Se-75 8.001E-01 1.20E+00 4.OOE+00 W-2 W3459-02 30 Zn-65 8.OOE-01 2.20E+00 7.601E+00 W-2 L3459-02 30 Zr-95 I1.70E+00 I1.80E+00 6.20E+00 W-3 L3459-03 30 AcTb-228 -2.50E+00 5.7013+00 2.001E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-208

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-3 L3459-03 30 Ag-108m 1.IOE+00 1.OOE+00 3.40E+00 W-3 U3459-03 30 Ag-I lOm 7.OOE-01 1.70E+00 5.80E+00 W-3 U3459-03 30 Ba-140 -4.1OE+00 3.40E+00 1.30E+01 W-3 L3459-03 30 Be-7 2.00E+00 l.OOE+01 3.60E+01 W-3 L3459-03 30 Ce-141 -6.80E+00 3. 1OE+00 I.10E+01 W-3 L3459-03 30 Ce-144 5.60E+00 6.10E+00 2.10E+01 W-3 L3459-03 30 Co-57 3.10E-01 7.70E-01 2.60E+00 W-3 U3459-03 30 Co-58 7.00E-0l 1.20E+00 4.20E+00 W-3 L3459-03 30 Co-60 -9.OOE-0O 1.30E+00 4.80E+00 W-3 L3459-03 30 Cr-51 -1.00E+00 1.30E+01 4.50E+01 W-3 U3459-03 30 Cs-134 -1.70E+00 1.30E+00 5.OOE+00 W-3 L3459-03 30 Cs-137 7.OOE-01 I .30E+00 4.50E+00 W-3 U3459-03 30 Fe-59 1.90E+00 4.OOE+00 1.40E+01 W-3 U3459-03 30 - H-3 -3.60E+02 3.80E+02 1.20E+03 W-3 L3459-03 30 1-131 7.00E-01 3.90E+00 1.30E+01 W-3 U3459-03 30 K-40 1.60E+01 2.20E+01 7.40E+01 W-3 L3459-03 30 La-140 -4.80E+00 3.90E+00 1.50E+01 W-3 U3459-03 30 Mn-54 -2.00E-01 1.20E+00 4.40E+00 W-3 12459-03 30 Nb-95 -3.OOE-01 1.SOE+00 5.40E+00 W-3 U3459-03 30 Ru-103 -3.00E+00 1.30E+00 5.OOE+00 W-3 U3459-03 30 Ru-106 -1.80E+0O l.lOE+01 4.20E+01 W-3 U3459-03 30 Sb-124 -5.80E+00 3.70E+00 1.50E+01 W-3 U3459-03 30 Sb-125 4.OOE+00 3.002+00 1.10E+01 W-3 L3459-03 30 Se-75 -9.OOE-0O 1.40E+00 5.10E+00 W-3 12459-03 30 Zn-65 -9.OOE+00 3.00E+00 1.20E+01 W-3 L3459-03 30 Zr-95 5.102+00 2.20E+00 7.10E+00 W-4 U3459-04 30 AcTh-228 5.20E+00 6.70E+00 2.30E+01 W4 12459-04 30 Ag-108m -1.00E+00 1.30E+00 4.80E+00 W4 L3459-04 30 Ag-I lOim 1.70E+00 2.00E+00 7.10E+00 W4 L3459-04 30 Ba- 140 -4.OOE+00 2.80E+00 1.202+01 W4 U3459-04 30 Be-7 l.OOE+00 1.30E+01 4.702+01 W4 W3459-04 30 Ce-141 8.00E-01 2.20E+00 7.40E+00 W4 U3459-04 30 Ce-144 -8.30E+00 7.80E+00 2.80E+01 W4 12459-04 30 Co-57 -3.20E-01 9.50E-01 3.302+00 W4 U2459-04 30 Co-58 -2.OOE-01 1.40E+00 5.20E+00 W4 U3459-04 30 Co-60 -4.00E-01 1.90E+00 7.30E+00 W4 U3459-04 30 Cr-51 -1.40E+01 1.40E+01 5.002+01 W4 U3459-04 30 Cs-134 -7.00E-01 1.60E+00 6.10E+00 W-4 L3459-04 30 Cs-137 -2.00E+00 1.50E+00 5.80E+00 W-4 L3459-04 30 Fe-59 2.40E+00 3.60E+00 1.30E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-209

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCilkg) (pCi/kg) (pCi/kg)

W4 L3459-04 30 H-3 9.70E+02 4.20E+02 1.20E+03 W-4 L3459-04 30 1-131 I.OOE+00 3.00E+00 l.lOE+0O W-4 L3459-04 30 K-40 3.80E+01 2.50E+01 8.40E+01 W-4 L3459-04 30 La-140 -4.60E+00 3.20E+00 1.30E+01 W-4 L3459-04 30 Mn-54 -2.10E+00 1.60E+00 6.20E+00 W-4 L3459-04 30 Nb-95 -6.60E+00 2.00E+00 8.20E+00 W4 L3459-04 30 Ru-103 -2.00E-01 1.50E+00 5.50E+00 W-4 L3459-04 30 Ru-106 5.OOE+00 1.40E3+01 5.OOE+01 WA4 L3459-04 30 Sb-124 5.60E+00 4.60E+00 1.60E+01 W-4 L3459-04 30 Sb- 125 2.80E+00 3.90E+00 1.30E+01 W-4 L3459-04 30 Se-75 -4.00E-01 1.90E+00 6.50E+00 W4 L3459-04 30 Zn-65 -2.90E1+00 3.50E+00 1.30E+01 W-4 L3459-04 30 Zr-95 -4.70E+00 2.80E+00 I.IOE+01 W-5 L3459-05 30 AcTh-228 1.14E+01 6.20E+00 2.00E+01 W-5 L3459-05 30 Ag-108m 0.00+00 1.20E+00 4.30E3+00 W-5 L3459-05 30 Ag-l [Om -1.70E1+00 2.40E1+00 8.80E+00 W-5 L3459-05 30 Ba-140 2.50E+00 2.90E+00 I.OOE+01I W-5 L3459-05 30 Be-7 0.OOE+04 1.30E+01 4.60E+01 W-5 W3459-05 30 Ce-141 1.60E+00 2.1OE+00 7.20E+00 W-5 L3459-05 30 Ce-144 -8.50E+00 7.80E+00 2.80E+01 W-5 L3459-05 30 Co-57 O.OOE+O0 1.00+00 3.50E+O0 W-5 L3459-05 30 Co-58 3.OOE-01 1.70E+00 6.20E+OO W-5 L3459-05 30 Co-60 3.80E+OO 1.90E+00 6.00E+00 W-5 L3459-05 30 Cr-51 -I.OOE+0O 1.40E+01 5.00E+01 W-5 12459-05 30 Cs-134 -2.10E+00 1.70E+00 6.60E+00 W-5 12459-05 30 Cs-137 -4.00E-01 1.70E+00 6.20E+00 W-5 12459-05 30 Fe-59 -3.40E+00 3.40E+00 1.30E+01 W-5 W3459-05 30 H-3 7.50E+02 4.10E+02 1.20E+03 W-5 W3459-05 30 1-131 -2.00E-01 3.10E+00 1.10+01 W-5 L3459-05 30 K-40 7.10E+01 3.10E+01 9.90E+0O W-5 L3459-05 30 La-140 2.90E+00 3.40E+00 1.20E+01 W-5 L3459-05 30 Mn-54 -2.90E+00 1.70E+00 6.50E+00 W-5 L3459-05 30 Nb-95 -5.OOE-01 1.70E+00 6.30E+00 W-5 L3459-05 30 Ru-103 -9.OOE-01 1.70E+00 6.002+00 W-5 L3459-05 30 Ru-106 2.OOE+00 I.50E+01 5.20E+01 W-5 12459-05 30 Sb-124 3.20E+00 4.80E+00 1.702+01 W-5 W3459-05 30 Sb-125 3.20E+00 3.90E+00 1.30E+01 W-5 L3459-05 30 Se-75 -2.00E-01 1.90E+00 6.50E+00 W-5 L3459-05 30 Zn-65 5.00E-01 4.20E+00 1.50E+01 W-5 L3459-05 30 Zr-95 -9.00-01 2.80E+00 I.OOE+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-210

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-6 U3459-06 30 AcTh-228 -3.OOE-01 4.90E+00 1.70E+01 W-6 U3459-06 30 Ag-108m 8.00E-01 l .lOE+00 3.70E+00 W-6 U2459-06 30 Ag-l1lm 2.OOE-0O 1.60E+00 5.60E+00 W-6 U3459-06 30 Ba-140 -3.OOE-0O 2.OOE+00 7.40E+00 W-6 U2459-06 30 Be-7 -2.61E+01 9.50E+00 3.70E+0I W-6 U3459-06 30 Ce-141 3.40E+00 1.90E+00 6.20E+00 W-6 12459-06 30 Ce-144 l .1OE+00 6.70E+00 2.30E+01 W-6 U3459-06 30 Co-57 1.50E-0O 8.50E-0O 2.90E+00 W-6 L3459-06 30 Co-58 -5.OOE-0O l.1OE+00 4.OOE+00 W-6 U3459-06 30 Co-60 1.70E+00 1.1 OE+00 3.70E-+00 W-6 U3459-06 30 Cr-51 l.OOE+0O .lOE+0I 3.60E+0O W-6 U3459-06 30 Cs-134 4.OOE-0O I. 1OE+00 4.OOE+00 W-6 12459-06 30 Cs-137 7.OOE-0O 1.20E+00 4.30E+00 W-6 U3459-06 30 Fe-59 -8.OOE-01 2.50E+00 9.OOE+00 W-6 U2459-06 30 H-3 7.20E+02 4.10E+02 1.20E+03 W-6 U3459-06 30 1-131 2.70E+00 2.40E+00 7.90E+00 W-6 U3459-06 30 K-40 6.70E+0O 2.10E+01 6.30E+01 W-6 U3459-06 30 La-140 -3.OOE-0O 2.30E+00 8.50E+00 W-6 U3459-06 30 Mn-54 7.OOE-0O 1.20E+00 4.20E+00 W-6 12459-06 30 Nb-95 -2.30E+00 1.20E+00 4.80E+00 W-6 U3459-06 30 Ru-103 -4.OOE-0O l.lOE+00 4.OOE+00 W-6 U3459-06 30 Ru-106 -1.50E+01 1.lOE+01 4.OOE+0O W-6 U3459-06 30 Sb-124 -2.50E+00 2.60E+00 l.OOE+01 W-6 U2459-06 30 Sb-125 7.OOE-01 3.10E+00 l.1OE+01 W-6 12459-06 30 Se-75 3.OOE-01 1.50E+00 5.OOE+00 W-6 L3459-06 30 Zn-65 1.25E+01 4.80E+00 1.50E+0O W-6 L3459-06 30 Zr-95 3.40E+00 2.10E+00 6.80E+00 W-7 L3459-07 30 AcTh-228 -2.90E+00 6.60E+00 2.40E+0O W-7 L3459-07 30 Ag-108m -I .IOE+00 1.20E+00 4.20E+00 W-7 L3459-07 30 Ag-llbm 2.30E+00 2.OOE+00 6.90E+00 W-7 L3459-07 30 Ba-140 3.30E+00 3.30E+00 1.20E+01 W-7 L3459-07 30 Be-7 -8.OOE+00 1.50E+0O 5.30E+01 W-7 L3459-07 30 Ce-141 1.70E+00 2.40E+00 8.OOE+00 W-7 L3459-07 30 Ce-144 -7.OOE-01 9.30E+00 3.20E+0O W-7 L3459-07 30 Co-57 -1.70E+00 1.20E+00 4.20E+00 W-7 12459-07 30 Co-58 -1.80E+00 1.50E+00 5.70E+00 W-7 L3459-07 30 Co-60 8.00E-0O 1.70E+00 5.90E+00 W-7 12459-07 30 Cr-51 l.OOE+0O 1.70E+01 5.70E+0O W-7 12459-07 30 Cs-134 -3.00E-01 1.50E+00 5.40E+00 W-7 U3459-07 30 Cs-137 -1.20E+00 1.40E+00 5.20E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-211

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-7 L3459-07 30 Fe-59 5.90E+00 3.1OE+00 1.OOE+0O W-7 L3459-07 30 H-3 O.OOE+00 3.90E+02 1.20E+03 W-7 L3459-07 30 1-131 -2.00E-01 4.70E+00 1.60E+01 W-7 L3459-07 30 K-40 -2.20E+01 2.1OE+0 7.80E+01 W-7 L3459-07 30 La-140 3.70E+00 3.90E+00 1.30E+01 W-7 L3459-07 30 Mn-54 l.OOE+00 1.50E+00 5.10E+00 W-7 W3459-07 30 Nb-95 3.40E+00 1.80E+00 6.OOE+00 W-7 L3459-07 30 Ru-103 -2.60E+00 1.80E+00 6.60E+00 W-7 L3459-07 30 Ru-106 -l.OOE+01 1.40E+0O 4.90E+01 W-7 L3459-07 30 Sb-124 -6.00E-01 4. 10E+00 1.50E+01 W-7 L3459-07 30 Sb-125 3.20E+00 3.90E+00 1.30E+01 W-7 L3459-07 30 Se-75 -1.I1OE+00 1.90E+00 6.60E+00 W-7 L3459-07 30 Zn-65 -5.20E+00 3.50E+00 1.30E+01 W-7 L3459-07 30 Zr-95 2.80E+00 2.70E+00 9.20E+00 W-8 L3459-08 30 AcTh-228 3.20E+00 3.80E+00 1.40E+01 W-8 L3459-08 30 Ag-108m 1.02E+00 6.50E-0O 2.10E+00 W-8 L3459-08 30 Ag-l lOm 9.00E-01 l.OOE+00 3.40E+00 -

W-8 L3459-08 30 Ba-140 -1.70E+00 1.70E+00 6.50E+00 W-8 L3459-08 30 Be-7 6.90E+00 7.00E+00 2.30E+01 W-8 L3459-08 30 Ce- 141 1.OOE+00 1.30E+00 4.20E+00 W-8 L3459-08 30 Ce-144 -4.OOE+00 4.20E1+00 1.50E+01 W-8 L3459-08 30 Co-57 -I.OOE-02 5.40E-01 1.80E+00 w-8 L3459-08 30 Co-58 -9.60E-0O 7.50E-01 2.70E+00 W-8 L3459-08 30 Co-60 6.00E-02 8.40E-01 2.90E+00 W-8 L3459-08 30 Cr-51 -5.80E+00 8.00EOE00 2.80E+01 W-8 L3459-08 30 Cs-134 1.12E+00 7.50E-01 2.50E+00 w-8 L3459-08 30 Cs-137 -5.30E-01 7.50E-0O 2.70E+00 w-8 L3459-08 30 Fc-59 7.OOE-01 1.70E+00 5.70E+00 W-8 L3459-08 30 H-3 9.OOE+0O 3.90E+02 1.20E+03 w-8 L3459-08 30 1-131 1.70E+00 2.50E+00 8.50E+00 W-8 L3459-08 30 K-40 3.20E+0O 1.40E+0O 4.40E+01 w-8 L3459-08 30 La-140 -1.90E+00 2.00E+00 7.40E+00 W-8 L3459-08 30 Mn-54 3.60E-0O 7.70E-01 2.60E+00 W-8 L3459-08 30 Nb-95 -3.50E+00 1.20E+00 4.30E+00 W-8 U3459-08 30 Ru-103 -3.04E+00 8.70E-0I 3.30E+00 W-8 L3459-08 30 Ru-106 -8.1OE+00 7.50E+00 2.70E+01 W-8 L3459-08 30 Sb- 124 1.40E+00 1.90E+00 6.60E+00 W-8 L3459-08 30 Sb-125 0.OOE+00 2.00E+00 6.80E+00 W-8 L3459-08 30 Se-75 5.OOE-0O l.OOE+00 3.40E+00 w-8 L3459-08 30 Zn-65 -9.00E-01 1.60E+00 5.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-212

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-8 L3459-08 30 Zr-95 0.OOE+00 1.40E+00 4.70E+00 W-9 L3459-09 30 AcTh-228 1.80E+00 4.10E+00 1.40E+0O W-9 L3459-09 30 Ag-108m 9.OOE-02 6.OOE-01 2.OOE+00 W-9 L3459-09 30 Ag-lOrm 4.70E-01 9.30E-01 3.20E+00 W-9 L3459-09 30 Ba-140 9.OOE-01 1.60E+00 5.60E+00 W-9 L3459-09 30 Be-7 8.90E+00 6.50E+00 2.20E+0O W-9 L3459-09 30 Ce-141 -2.70E+00 1.50E+00 5.30E+00 W-9 L3459-09 30 Ce-144 4.OOE-01 3.70E+00 1.30E+0I W-9 L3459-09 30 Co-57 4.20E-01 6.70E-01 2.20E+00 W-9 L3459-09 30 Co-58 -6.60E-01 7.40E-01 2.70E+00 W-9 L3459-09 30 Co-60 -7.10E-01 8.40E-01 3.OOE+00 W-9 L3459-09 30 Cr-51 -6.80E+00 7.60E+00 2.70E+01 W-9 L3459-09 30 Cs-134 -5.40E-01 7.60E-01 2.70E+00 W-9 L3459-09 30 Cs-137 -I.SOE+00 7.50E-01 2.70E+00 W-9 L3459-09 30 Fe-59 1.30E+00 1.60E+00 5.40E+00 W-9 L3459-09 30 H-3 1.40E+02 4.00E+02 1.20E+03 W-9 L3459-09 30 1-131 4.30E+00 3.OOE+00 9.80E+00 W-9 L3459-09 30 K-40 -4.OOE+00 1.50E+01 5.OOE+01 W-9 L3459-09 30 La-140 I.OOE+00 1.90E+00 6.40E+00 W-9 L3459-09 30 Mn-54 -9.60E-01 6.90E-01 2.50E+00 W-9 L3459-09 30 Nb-95 3.OOE-01 9.OOE-01 3.10E+00 W-9 L3459-09 30 Ru-103 9.OOE-02 8.OOE-01 2.80E+00 W-9 L3459-09 30 Ru-106 1.78E+01 6.70E+00 2.10E+01 W-9 L3459-09 30 Sb-124 -2.1OE+00 2.1OE+00 7.60E+00 w-g L3459-09 30 Sb-125 -1.80E+00 1.80E+00 6.30E+00 W-9 L3459-09 30 Se-75 -1.21E+00 7.70E-01 2.70E+00 W-9 L3459-09 30 Zn-65 -2.30E+00 1.60E+00 5.80E+00 W-9 L3459-09 30 Zr-95 2.OOE-01 1.30E+00 4.60E+00 W-1O L3459-10 30 Aclh-228 9.20E+00 5.10E+00 2.OOE+0O W-1O L3459-10 30 Ag-108m -2.OOE-01 1.IOE+00 3.70E+00 W-10 L3459-10 30 Ag-lOnm O.OOE+00 2.OOE+00 7.20E+00 W-10 L3459-10 30 Ba-140 -I.OOE+00 3.30E+00 1.30E+0O W-IO L3459-10 30 Be-7 3.OOE+00 1.20E+01 4.10E+0O W-1O L3459-10 30 Ce-141 -5.40E+00 2.1OE+00 7.60E+00 W-lo L3459-10 30 Ce-144 -8.70E+00 7.OOE+00 2.50E+0O W-1O L3459-10 30 Co-57 -1.20E+00 8.30E-01 2.90E+O0 D-213

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCilkg) (pCi/kg) (pCilkg) w-Io W3459-10 30 Cs-137 3.00E-01 1.30E+00 4.70E+00 w-1o W3459-10 30 Fe-59 1.20E+00 3.40E+0O 1.20E+01 W-10 W3459-10 30 H-3 1.50E+02 3.90E+02 1.202+03 W-10 W3459-10 30 1-131 -3.70E+00 4.00E+00 I .40E+0O W-10 L3459-10 30. K-40 9.00E+00 2.30E+0O 8.00E+0O W-10 L3459-10 30 La-140 -1.20E+00 3.80E+00 1.40E+0O W-10 L3459-10 30 Mn-54 -4.00E-01 1.40E+00 5.OOE+00 W-10 L3459-10 30 Nb-95 -4.90E+00 2.70E+00 l.OOE+01 W-10 L3459-10 30 Ru-103 -3.80E+00 1.40E+00 5.60E+00 W-10 L3459-10 30 Ru-106 1.50E+01 1.30E+01 4.20E+01 W-10 L3459-10 30 Sb-124 1.30E+00 4. 1OE+00 I .50E+0I W-10 L3459-10 30 Sb-125 -3.90E+00 3.40E+00 1.20E+0O W-10 W3459-10 30 Se-75 1.50E+00 1.60E+00 5.50E+00 W-10 W3459-10 30 Zn-65 1.40E+00 6.30E+00 2.20E+01 W-10 W3459-10 30 Zr-95 3.80E+00 2.40E+00 8.10E+00 W-1I 12459-11 30 AcTh-228 9.OOE-0I 5.50E+00 L.90E+01 W-11 L3459-11 30 Ag-108m 2.20E-01 9.50E-01 3.30E+00 W-11 L3459-11 30 Ag-l lOm 1.20E+00 1.80E+00 6.10E+00 W-Il W3459-11 30 Ba- 140 -2.70E+00 3.40E+00 1.30E+01 W-l1 L3459- 11 30 Be-7 -7.OOE+00 1.1OE+01 3.90E+01 W-1l L3459-1 I 30 Ce- 141 9.OOE-01 l.90E+00 6.50E+00 W-11 L3459-1 I 30 Ce-144 3.80E+00 6.20E+00 2.10E+0O W-11 12459-11 30 Co-57 -3.90E-0I 7.70E-0I 2.60E+00 W-11 W3459-11 30 Co-58 -2.50E+00 1.30E+00 5.00E+00 W-ll W3459-11 30 Co-60 1.90E+00 1.60E+O00 5.20E+00 W-ll W3459-11 30 Cr-51 2.00E+00 1.30E+0O 4.40E+01 W-ll W3459-11 30 Cs-134 8.00E-0O 1.30E+00 4.50E+00 W-1I L3459-11 30 Cs- 137 LOOE-0I 1.20E+-O 4.30E+00 W-1l L3459-11 30 Fe-59 -4.40E+00 3.OOE+00 1.20E+0O W-1l L3459-1 1 30 H-3 -1.40E+02 3.90E+02 1.20E+03 W-11 L3459- 11 30 1-131 I.90E+00 4.30E+00 1.50E+01 W-ll L3459-11 30 K-40 -I.IOE+01 I.90E+0O 6.80E+0O W-ll W3459-11 30 La- 140 -3.0IE+O0 3.90E+00 1.50E+01 W-11 L3459-11 30 Mn-54 1.20E+00 I .30E+00 4.50E+00 W-ll W3459-11 30 Nb-95 -I.OOE-0O 1.40E+00 4.90E+00 W-Il L3459-1 1 30 Ru-103 1.30E+00 1.40E+00 4.80E+00 W-1l L3459- 11 30 Ru-106 -1.60E+0O 1.20E+01 4.30E+01 W-1l L3459- 11 30 Sb-124 -6.40E+00 3.90E+00 1.60E+01 W-l1 L3459-11 30 Sb-125 6.20E+O0 2.90E+00 9.40E+00 W-1l L3459-1 1 30 Se-75 7.OOE-0O 1.50E+00 5.10E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-214

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg) w-I1 L3459-11 30 Zn-65 -6.80E+00 2.90E+00 1.20E+01 W-ll L3459-11 30 Zr-95 9.OOE-01 2.30E+00 7.90E+O0 W-12 L3459-12 30 AcTh-228 -7.OOE-01 4.20E+00 1.50E+0I W-12 L3459-12 30 Ag-108m -6.50E-01 8.70E-01 3.1OE+00 W-12 U3459-12 30 Ag-I lOm 1.90E+00 1.50E+00 4.90E+00 W-12 L3459-12 30 Ba-140 -8.OOE-01 2.20E+00 8.20E+00 W-12 L3459-12 30 Be-7 1.04E+01 8.60E+00 2.90E+0O W-12 L3459-12 30 Ce-141 -I.OOE-01 1.70E+00 5.90E+00 W-12 L3459-12 30 Ce-144 -1.90E+00 5.90E+00 2.OOE+0O W-12 L3459-12 30 Co-57 2.OOE-02 7.50E-01 2.60E+00 W-12 L3459-12 30 Co-58 -6.OOE-01 1.lOE+00 3.90E+00 W-12 L3459-12 30 Co-60 1.80E+00 l.OOE+00 3.40E+00 W-12 L3459-12 30 Cr-51 -I.OOE+00 1.20E+01 4.OOE+01 W-12 L3459-12 30 Cs-134 6.OOE-0O l.OOE+O0 3.50E+00 W-12 L3459-12 30 Cs-137 -1.20E+O0 1.1OE+O0 3.90E+O0 W-12 L3459-12 30 Fe-59 -4.20E+O0 2.20E+00 8.50E+O0 W-12 L3459-12 30 H-3 -1.50E+02 3.90E+02 1.20E+03 W-12 L3459-12 30 1-131 5.50E+O0 3.60E+00 1.20E+0I W-12 L3459-12 30 K-40 4.10E+0O 1.70E+01 5.50E+O1 W-12 L3459-12 30 La-140 -9.OOE-0O 2.60E+00 9.40E+O0 W-12 L3459-12 30 Mn-54 7.OOE-OI l.OOE+00 3.50E+O0 W-12 L3459-12 30 Nb-95 -1.60E+O0 2.OOE+00 7.20E+O0 W-12 L3459-12 30 Ru-103 -1.70E+O0 l.lOE+00 4.10E+O0 W-12 L3459-12 30 Ru-106 -I.OOE-0O 9.80E+00 3.40E+O1 W-12 L3459-12 30 Sb-124 -4.60E+00 2.80E+00 1.IOE+O1 W-12 L3459-12 30 Sb-125 l.OOE+O0 2.80E+00 9.SOE+O0 W-12 L3459-12 30 Se-75 l.OOE+OO 1.30E+00 4.40E+O0 W-12 L3459-12 30 Zn-65 5.10E+O0 4.50E+00 1.50E+01 W-12 L3459-12 30 Zr-95 2.70E+00 1.80E+00 5.80E+00 W-13 L3459-13 30 AcTh-228 1.OIE+0O 3.60E+00 1.1OE+01 W-13 L3459-13 30 Ag-108m -1.06E+00 8.10E-01 2.90E+O0 W-13 L3459-13 30 Ag-Il0m 9.OOE-0I l.1OE+O0 3.80E+00 W-13 L3459-13 30 Ba-140 3.50E+00 2.20E+00 7.30E+O0 W-13 L3459-13 30 Be-7 -1.08E+OI 7.80E+00 2.80E+0I W-13 L3459-13 30 Ce-141 l.OOE+00 1.60E+00 5.30E+00 W-13 L3459-13 30 Ce-144 -7.80E+00 5.IOE+00 1.80E+0O W-13 L3459-13 30 Co-57 -1.35E+00 8.10E-01 2.80E+00 W-13 L3459-13 30 Co-58 -7.60E-0O 9.50E-01 3.50E+00 W-13 L3459-13 30 Co-60 -6.OOE-0O l.lOE+O0 3.90E+00 W-13 L3459-13 30 Cr-51 -2.OOE+O0 l.OOE+OI 3.50E+OI

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-215

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-13 L3459-13 30 Cs-134 -1.97E+00 8.90E-01 3.50E+00 W-13 L3459-13 30 Cs-137 -6.90E-01 9.80E-01 3.50E+00 W-13 L3459-13 30 Fe-59 2.30E+00 2.10E+00 7.10E+00 W-13 L3459-13 30 H-3 6.00E+01 3.90E+02 1.20E+03 W-13 L3459-13 30 1-131 -2.40E+00 3.60E+00 1.30E+01 W-13 L3459-13 30 K-40 4.00E+00 1.60E+01 5.60E+01 W-13 L3459-13 30 La-140 4.00E+00 2.50E+00 8.40E+00 W-13 L3459-13 30 Mn-54 -1.22E+00 8.90E-01 3.30E+O0 W-13 L3459-13 30 Nb-95 -2.OOE-01 l.IOE+00 4.00E+00 W-13 L3459-13 30 Ru-103 -8.00E-01 I.IOE+00 3.80E+00 W-13 L3459-13 30 Ru-106 7.60E+00 8.30E+00 2.80E+01 W-13 L3459-13 30 Sb-124 -1.20E+00 2.50E+00 9.302+00 W-13 L3459-13 30 Sb-125 -1.IOE+00 2.60E+00 9.00E+00 W-13 L3459-13 30 Se-75 -3.00E-01 I.IOE+00 3.602+00 W-13 13459-13 30 Zn-65 6.70E+00 4.1OE+00 1.30E+01 W-13 L3459-13 30 Zr-95 2.60E+00 1.80E+00 6.IOE+00 W-14 L3459-14 30 AcTh-228 -2.50E+00 5.30E+00 1.90E+01 W-14 L3459-14 30 Ag-108m 1.90E1+00 9.90E-01 3.202+00 W-14 L3459-14 30 Ag-l1lm -9.OOE-01 1.80E+00 6.40E+00 W-14 L3459-14 30 Ba-140 -5.20E+00 3.00E+00 1.20E+01 W-14 L3459-14 30 Be-7 -I.IOE+01 l.IOE+01 4.IOE+0O W-14 L3459-14 30 Ce-141 -1.IOE+00 4.1OE+00 1.40E+0O W-14 L3459-14 30 Ce-144 -2.40E+00 8.10E+00 2.80E+01 W-14 L3459-14 30 Co-57 -1.IOE+00 I.IOE+00 3.60E+00 W-14 L3459-14 30 Co-58 -2.OOE-01 1.40E+00 5.OOE+00 W-14 L3459-14 30 Co-60 -1.50E+00 1.40E+00 5.30E+00 W-14 L3459-14 30 Cr-51 -7.OOE+00 1.40E+01 4.70E+01 W-14 L3459-14 30 Cs-134 I.OOE+00 1.50E+00 5.00E+00 W-14 L3459-14 30 Cs-137 -1.00-01 1.30E+00 4.60E+00 W-14 L3459-14' 30 Fe-59 6.30E+00 3.10E+00 9.802+00 W-14 L3459-14 30 H-3 3.60E+02 4.00E+02 1.20E+03 W-14 L3459-14 30 1-131 6.70E+00 4.30E+00 1.40E+01 W-14 L3459-14 30 K-40 1.80E+01 2.20E+01 7.40E+01 W-14 L3459-14 30 La-140 -5.90E+00 3.50E+00 1.40E+01 W-14 L3459-14 30 Mn-54 -2.00E-01 1.30E+00 4.50E+00 W-14 L3459-14 30 Nb-95 -1.20E+00 1.60E+00 5.80E+00 W-14 L3459-14 30 Ru-103 -2.60E+00 1.60E+00 5.80E+00 W-14 L3459-14 30 Ru-106 -3.202+01 1.10+01 4.202+01 W-14 L3459-14 30 Sb-124 -1.20E+00 3.60E+00 1.30E+01 W-14 L3459-14 30 Sb-125 -1.60E+00 3.20E+00 1.IOE+0O

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-216

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-14 L3459-14 30 Se-75 6.OOE-01 1.80E3+00 5.901E+00 W-14 L3459-14 30 Zn-65 -8.50E+00 3.OOE+O0 1.201E+01 W-14 L3459-14 30 Zr-95 1.30E+O00 2.30E+00 8.001E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-217

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg) w-I L4188-01 43 Ac11-228 -1.10E+00 4.80E+00 1.70E+0O w-1 L4188-01 43 Ag-108m -4.00E-01 1.IOE+00 4.00E+00 w-1 L4188-01 43 Ag-llbm -2.00E-O1 1.70E+00 6.10OE+00 w-1 L4188-01 43 Ba-140 3.30E+00 2.70E+00 9.OOE+00 w-l L4188-01 43 Be-7 3.00E+00 1.lOE+01 3.80E+01 w-I L4188-01 43 Ce-141 -2.30E+00 2.30E+00 8. IOE+00 w-1 L4188-01 43 Ce-144 7.20E+00 7.60E+00 2.50E+01 w-1 L4188-01 43 Co-57 1.70E-01 9.20E-Ot 3.20E+00 w-1 L4188-01 43 Co-58 -1.30E+00 1.20E+00 4.60E+00 w-1 L4188-01 43 Co-60 -4.OOE-01 1.20E+00 4.60E+00 w-I L4188-01 43 Cr-51 7.OOE+OO 1.30E+01 4.30E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-218

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-1 L4188-01 43 Cs-134 -1.00E-01 1.40E+00 5.00E+00 W-l L4188-01 43 Cs-137 3.00E-01 1.30E+00 4.50E+00 W-l LU188-01 43 Fe-59 I.IOE+00 2.90E+00 1.OOE+0O W- L4188-01 43 H-3 -1.I10+02 5.30E+02 1.60E+03 W- L4188-01 43 1-131 1.50E+00 4.30E+00 1.50E+01 W-l L188-01 43 K-40 2.90E+01 1.90E+01 6.40E+01 W-l LU188-01 43 La-140 3.80E+00 3.10E+00 I.OOE+0I W-1 L4188-01 43 Mn-54 -I.OOE-01 1.20E+00 4.30E+00 W-l L188-01 43 Nb-95 -1.20E+00 1.60E+00 5.70E+00 W-l L4188-01 43 Ru-103 -2.1OE+00 1.50E+00 5.50E+00 W-l L4188-01 43 Ru-106 1.20E+01 1.20E+01 4.10E+01 W-1 L4188-01 43 Sb-124 -3.60E+00 3.30E+00 1.30E+01 W- L4188-01 43 Sb-125 -4.10E+00 3.10E+00 1.20E+01 W-1 L4188-01 43 Se-75 -2.50E+00 1.60E+00 5.60E+00 W-l UA188-01 43 Zn-65 -3.50E+00 3.20E+00 1.20E+01 W-1 LU188-01 43 Zr-95 I.OOE-0I 2.20E+00 7.80E+00 W-2 L4188-02 43 AcTh-228 -2.OOE-01 5.00E+00 1.80E+01 W-2 L4188-02 43 Ag-108m 1.30E+00 I.OOE+O0 3.40E+00 W-2 L4188-02 43 Ag-l1lm -3.00E-01 1.40E+00 5.20E+00 W-2 L4188-02 43 Ba-140 -1.50E+00 2.20E+00 8.80E+00 W-2 LU188-02 43 Be-7 -4.OOE+00 1.00E+0 3.60E+01 W-2 L4188-02 43 Ce-141 -I.OOE-O1 1.30E+00 4.502+00 W-2 L4188-02 43 Ce-144 1.08E+01 6.20E+00 2.00E+01 W-2 L4188-02 43 Co-57 -1;63E+00 7.90E-01 2.90E+00 W-2 L188-02 43 Co-58 -1.50E+00 1.20E+00 4.60E+00 W-2 L4188-02 43 Co-60 3.00E-01 1.10E+00 4.1OE+00 W-2 L4188-02 43 Cr-51 8.00E+00 1.20E+01 4.10E+01 W-2 L4188-02 43 Cs-134 1.50E+00 1.IOE+00 3.60E+00 W-2 L4188-02 43 Cs-137 6.OOE-01 1.20E+00 4.10E+00 W-2 L4188-02 43 Fe-59 -3.00E-01 2.60E+00 9.50E+00 W-2 14188-02 43 H-3 3.70E+02 5.40E+02 1.60E+03 W-2 U4188-02 43 1-131 8.00E-01 3.80E+00 1.30E+0O W-2 L4188-02 43 K-40 -4.OOE+00 1.80E+01 6.50E+01 W-2 L4188-02 43 La-140 -1.80E+00 2.50E+00 I.OOE+01 W-2 L4188-02 43 Mn-54 -1.50E+00 1.20E+00 4.50E+00 W-2 LA188-02 43 Nb-95 -1.80E+00 1.40E+00 5.40E+00 W-2 LA188-02 43 Ru-103 -3.50E+00 1.30E+00 5.00E+00 W-2 L4188-02 43 Ru-106 4.00E+00 1.10E+01 4.00E+01 W-2 LA188-02 43 Sb-124 7.20E+00 3.20E+00 9.70E+00 W-2 LA188-02 43 Sb-125 -6.50E+00 2.90E+00 1.10E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-219

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-2 L4188-02 43 Se-75 2. 10E+00 1.20E+00 4.00E+00 W-2 L4188-02 43 Zn-65 6.00E-01 3.20E+00 1.1OE+01 W-2 L4188-02 43 Zr-95 3. 10E+00 2.202+00 7.40E+00 W-3 L4188-03 43 AcTh-228 6.20E+OO 3.20E+00 1.OOE+01 W-3 L4188-03 43 Ag-108m 9.70E-01 7.00E-0O 2.30E+00 W-3 L4188-03 43 Ag-l lOm 1.OOE+00 1.lOE+00 3.70E+00 W-3 L4188-03 43 Ba-140 -1.70E+00 1.90E+0O 7.10E+00 W-3 L4188-03 43 Be-7 -5.70E+00 7.40E+00 2.60E+01 W-3 L4188-03 43 Ce-141 -1.20E+00 1.40E+00 4.90E+00 W-3 L4188-03 43 Ce-144 -6.OOE-0O 4.60E+00 1.60E+01 W-3 L4188-03 43 Co-57 -1.20E-01 5.90E-01 2.00E+00 W-3 L4188-03 43 Co-58 -1.43E+00 8.70E-01 3.20E+00 W-3 L4188-03 43 Co-60 -1.60E-0I 8.40E-01 3.00E+00 W-3 L4188-03 43 Cr-51 6.80E+00 9.50E+OO 3.20E+01 W-3 L4188-03 43 Cs-134 8.70E-01 8.20E-01 2.80E+00 W-3 L4188-03 43 Cs-137 -1.91E+00 9.30E-0O 3.40E+00 W-3 L4188-03 43 Fe-59 3.80E+00 2.OOE+00 6.60E+00 W-3 L4188-03 43 H-3 8.00E+0O 5. 10E+02 1.60E+03 W-3 L4188-03 43 1-131 -3.00E-01 2.90E+00 9.80E+00 W-3 L4188-03 43 K-40 -3.00E+00 1.50E+01 5.20E+01 W-3 L4188-03 43 La-140 -2.00E+00 2.20E+00 8.10OE+00 W-3 L4188-03 43 Mn-54 3.10E-01 8.10E-01 2.80E+00 W-3 L4188-03 43 Nb-95 -8.00E-0l 1.IOE+00 4.10E+00 W-3 L4188-03 43 Ru-103 -2. 10E+00 l.OOE+00 3.80E+00 W-3 L4188-03 43 Ru-106 8.50E+00 8.50E+00 2.90E+0O W-3 L4188-03 43 Sb-124 -I.OOE+00 2.20E+00 8.30E+00 W-3 L4188-03 43 Sb-125 -5.OOE-01 2. 10E+00 7.40E+00 W-3 L4188-03 43 Se-75 -1.79E+00 9.60E-01 3.40E+00 W-3 L4188-03 43 Zn-65 9.70E+00 3.40E+00 1.10+01 W-3 L4188-03 43 Zr-95 3.00E-01 1.60E+00 5.70E+00 W4 L4188-04 43 AcTh-228 2.50E+00 3.20E+00 1.40E+01 W-4 L4188-04 43 Ag-108m 1.21E+00 7.50E-01 2.50E+00 W4 UA188-04 43 Ag-i lOm -6.OOE-01 1.30E+00 4.50E+00 W4 L4188-04 43 Ba-140 -1.302+00 2.00E+00 7.50E+00 W4 L4188-04 43 Be-7 3.40E+00 8.20E+00 2.80E+01 W4 L4188-04 43 Ce-141 -1.50E+00 1.80E+00 6.OOE+00 W4 L4188-04 43 Ce-144 -6.60E+00 5.20E+00 1.80E+01 W-4 [4188-04 43 Co-57 8.00E-02 6.90E-01 2.30E+00 W4 L4188-04 43 Co-58 I.OOE-0I l.OOE+00 3.60E+00 W-4 L4188-04 43 Co-60 1.60E-01 9.70E-01 3.40E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-220

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-4 L4188-04 43 Cr-51 5.10E+00 9.60E+00 3.20E+01 W.4 L4188-04 43 Cs-134 2.20E-01 9.50E-01 3.30E+00 W-4 L4188-04 43 Cs-137 8.OOE-02 9.40E-01 3.20E+00 W-4 L4188-04 43 Fe-59 -2.OOE-01 2.40E+00 8.40E+00 W-4 L4188-04 43 H-3 L.OOE+03 5.50E+02 1.60E+03 W4 L4188-04 43 1-131 -5.40E+00 3.OOE+00 l.lOE+01 W-4 L4188-04 43 K-40 4.OOE+01 1.50E+01 4.70E+01 W-4 L4188-04 43 La-140 -1.50E+00 2.30E+00 8.60E+00 W-4 L4188-04 43 Mn-54 -1.38E+00 8.80E-01 3.20E+00 W.4 L4188-04 43 Nb-95 I.OOE-0O 1.20E+00 4.10E+00 W-4 L4188-04 43 Ru-103 3.OOE-01 L.OOE+00 3.40E+00 W4 L4188-04 43 Ru-106 -6.70E+00 9.OOE+00 3.20E+01 W4 L4188-04 43 Sb-124 -1.70E+00 2.30E+00 8.70E+00 W4 L4188-04 43 Sb-125 6.70E+00 2.30E+00 7.40E+00 W4 L4188-04 43 Se-75 -8.00E-01 1.20E+00 4.10E+00 W4 L4188-04 43 Zn-65 -3.80E+00 2.90E+00 1.IOE+0O WA4 L4188-04 43 Zr-95 2.30E+00 1.40E+00 4.60E+00 W-5 L4188-05 43 AcTh-228 -1.40E+00 4.10E+00 1.40E+01 W-5 L4188-05 43 Ag-108m 1.30E-01 7.10E-01 2.40E+00 W-5 L4188-05 43 Ag-llbm -7.OOE-01 I.IOE+00 4.00E+00 W-5 L4188-05 43 Ba-140 I.OOE+00 1.70E+00 6.OOE+00 W-5 L4188-05 43 Be-7 -1.38E+01 7.50E+00 2.70E+01 W-5 L4188-05 43 Ce-141 1.70E+00 2.10E+00 6.90E+00 W-5 L4188-05 43 Ce-144 2.30E+00 4.70E+00 1.60E+01 W-5 L4188-05 43 Co-57 -4.20E-01 5.90E-01 2.00E+00 W-5 L4188-05 43 Co-58 -5.OOE-02 9.30E-01 3.30E+00 W-5 14188-05 43 Co-60 -4.90E-01 8.40E-01 3.10E+00 W-5 L4188-05 43 Cr-51 -6.70E+00 9.50E+00 3.30E+01 W-5 14188-05 43 Cs-134 -5.OOE-02 8.60E-01 3.OOE+00 W-5 L4188-05 43 Cs-137 -4.80E-01 9.30E-01 3.30E+00 W-5 L4188-05 43 Fe-59 5.20E+00 2.OOE+00 6.20E+00 W-5 L4188-05 43 H-3 6.20E+02 5.50E+02 1.60E+03 W-5 L4188-05 43 1-131 3.00E-01 3.OOE+00 I.OOE+0I W-5 14188-05 43 K-40 8.00E+01 1.50E+01 4.40E+01 W-5 L4188-05 43 La-140 I.IOE+00 2.OOE+00 6.80E+00 W-5 14188-05 43 Mn-54 1.40E-01 7.80E-01 2.70E+00 W-5 L4188-05 43 Nb-95 -2.30E+00 I.IOE+00 4.10E+00 W-5 L4188-05 43 Ru-103 -9.20E-01 9.90E-01 3.50E+00 W-5 LA188-05 43 Ru-106 6.00E+00 8.20E+00 2.80E+01 W-5 L4188-05 43 Sb-124 I.OOE+00 2.20E+00 7.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-221

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-5 L4188-05 43 Sb-125 -2.10E+00 2.30E+00 8.00E+00 W-S L4188-05 43 Se-75 -1.50E-01 9.70E-01 3.30E+00 W-5 L4188-05 43 Zn-65 -5.00E-OI 1.80E+OO 6.30E+00 W-5 L4188-05 43 Zr-95 -l.0013+00 1.70E+00 6.20E+00 W-6 L4188-06 43 AcTh-228 -4.70E+OO 4.101E+OO 1.50E+OI W-6 LA188-06 43 Ag- 108m 1.72E+00 7.20E-OI 2.30E+00 W-6 L4188-06 43 Ag-llOm 2. IOE+00 1.30E+00 4.20E+00 W-6 LA188-06 43 Ba-140 -2.OOE-0O 2.00E+00 7. IOE+00 W-6 LA1 88-06 43 Be-7 -1.02E+0O 8.1OE+00 2.90E+01 W-6 LlA88-06 43 Ce-141 -3.00E-0I 1.50E+00 5.00E+00 W-6 L4188-06 43 Ce-144 -1.1 IE+0O 4.90E+00 1.80E+OI W-6 L4188-06 43 Co-57 5.40E-01 6.50E-01 2.20E+00 W-6 L4188-06 43 Co-58 -L.OOE-0O 8.50E-01 3.00E+00 W-6 L4188-06 43 Co-60 1.30E+0O l.lOE+00 3.60E+00 W-6 L4188-06 43 Cr-51 -1.90E+0O 9.40E3+00 3.20E+OI W-6 LA188-06 43 Cs-134 5.OOE-OI 8.80E-OI 3.00E+00 W-6 L4A 88-06 43 Cs-137 -9.60E-0O 9.80E-0O 3.50E+00 W-6 LA188-06 43 Fe-59 4.OOE-OI 2.00E+00 7.10+00 W-6 LA188-06 43 H-3 -2.OOE+02 5.20E+02 1.60E+03 W-6 LA188-06 43 1-131 2.90E+00 3.00E+00 I.OOE+0O W-6 LA188-06 43 K-40 4.30E+01 1.60E+0O 5.10E+01 W-6 LA1 88-06 43 LA-140 -3.OOE-OI 2.30E+00 8.20E+00 W-6 LA188-06 43 Mn-54 2.10E-0O 8.50E-ol 3.00E+00 W-6 L1A 88-06 43 Nb-95 -1 .60E+00 1.40E+00 4.80E+00 W-6 LA188-06, 43 Ru-103 l.OOE-01 l.IOE+00 3.70E+00 W-6 LA188-06 43 Ru-106 9.60E+00 8.40E+00 2.80E+01 W-6 L4188-06 43 Sb- 124 4.90E+OO 2.20E+00 6.70E+00 -

W-6 LA188-06 43 Sb-125 6.00E-01 2.30E+00 8.00E+00 W-6 LA1 88-06 43 Se-75 -2.40E+00 1.20E+00 4.10E+00 W-6 LA188-06 43 Zn-65 1.70E+00 2.60E+00 8.70E+00 W-6 LA188-06 43 Zr-95 -2.80E+00 1.50E1+O0 5.80E+00 W-7 LA188-07 43 AcTh-228 0.OOE+00 2.60E+00 8.80E+00 W-7 LA1 88-07 43 Ag-108m 3.80E-01 4.70E-01 1.60E+00 W-7 LA188-07 43 Ag-l lOm -8.70E-OI 7.OOE-0O 2.50E+00 W-7 LA188-07 43 Ba-140 -4.00E-0O I.OOE+00 3.70E+00 W-7 L4188-07 43 Be-7 -6.00E+00 5.00E+00 1.70E+01 W-7 LA188-07 43 Ce-141 -4.00E-01 9.40E-01 3.20E+00 W-7 LA188-07 43 Ce-144 4.30E+00 3. tOE+00 1.002+01 W-7 LA188-07 43 Co-57 -1.40E-0O 4.002-01 1.40E+00 W-7 LA188-07 43 Co-58 -6.00E-02 5.90E-01 2.00E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-222

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-7 L4188-07 43 Co-60 -6.40E-01 5.80E-01 2.101E+00 W-7 L4188-07 43 Cr-51 7.70E+00 6.OOE+00 2.OOE+01 W-7 L4188-07 43 Cs-134 1.35E+00 6.10O-01 2.001E+00 W-7 L4188-07 43 Cs-137 1.90E-01 6.301E-01 2. 101+00 W-7 L4188-07 43 Fe-59 7.00E-01 1.20E+00 4.20E+00 W-7 L4188-07 43 H-3 2.60E+02 5.501E+02 1.60E+03 W-7 L4188-07 43 1-131 1.60E+00 1.701E+00 5.60E+00 W-7 L4188-07 43 K-40 -1.OOE+00 LOOE1+01 3.501E+01 W-7 L4188-07 43 La-140 -5.00E-01 1.20E+00 4.20E+00 W-7 L4188-07 43 Mn-54 -1.OIE+00 5.40E-01 2.OOE+00 W-7 L4188-07 43 Nb-95 -3.50E-01 6.80E-01 2.40E+O00 W-7 L4188-07 43 Ru-103 -1.69E+00 6.60E-01 2.40E+00 W-7 L4188-07 43 Ru-106 2.40E+00 5.90E+00 2.001E+01 W-7 L4188-07 43 Sb-124 -1.OOE+00 1.50E+00 5.50E+00 W-7 L4188-07 43 Sb-125 -1.70E+00 1.50E3+00 5.301E+00 W-7 L4188-07 43 Se-75 2.20E-01 6.30E-01 2.10E+00 W-7 L4188-07 43 Zn-65 1.IOE+00 1.70E+00 5.701E+00 W-7 L4188-07 43 Zr-95 -11.OOE-O1 1.20E+00 4.20E+00 W-8 L4188-08 43 AcTh-228 -1.90E+00 4.501E+00 1.60E+01 W-8 L4188-08 43 Ag-108m -9.00E-01 6.901E-01 2.40E+00 W-8 L4188-08 43 Ag-I lOm 1.OOE-01 1.40E+00 4.70E+00 W-8 L4188-08 43 Ba-140 1.OOE+00 2. 10t+00 7.401E+00 W-8 L4188-08 43 Be-7 -3.50E+00 8.40E+00 2.90E+01 W-8 L4188-08 43 Ce-141 -2.50E+00 I.901E+00 6.30E3+00 W-8 U4188-08 43 Ce-144 4.OOE+00 5.60E+00 I1.90E+01 W-8 L4188-08 43 Co-57 -7.60E-01 7.401E-01 2.501E+00 W-8 L4188-08 43 Co-58 -1.28E+O0 9.OOE-01 3.30E+00 W-8 L4188-08 43 Co-60 1.91E+00 9.OOE-01 2.90E+00 W-8 L4188-08 43 Cr-51 -1.53E+01 9.70E+00 3.40E+01 W-8 L4188-08 43 Cs-134 1.72E+00 9.20E-01 3.OOE+00 W-8 L4188-08 43 Cs-137 -3.54E+00 9.30E-01 3.50E+00 W-8 L4188-08 43 Fe-59 1.lOE+00 1.90E+00 6.60E+00 W-8 L4188-08 43 H-3 -1. IOE+02 5.40E+02 1.60E+i03 W-8 L4188-08 43 1-131 4.OOE+00 2.70E+00 8.90E+00 W-8 L4188-08 43 K-40 -9.OOE+00 1.50E+01 5.30E+01 W-8 L4188-08 43 La-140 1.OE+00 2.501E+00 8.50E+00 W-8 L4188-08 43 Mn-54 -7.30E-0O 9.60E-01 3.40E+00 W-8 L4188-08 43 Nb-95 1.40E+00 1.IOE+00 3.50E+00 W-8 L4188-08 43 Ru-103 -6.OOE-0I 1.OOE+00 3.50E-e00 W-8 L4188-08 43 Ru-106 -9.OOE-01 8.OOE+00 2.801E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-223

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-8 L4188-08 43 Sb-124 -5.20E+00 2.20E+00 8.90E+00 W-8 L4188-08 43 Sb-125 -2.30E+00 2.20E+00 7.60E+00 W-8 L4188-08 43 Se-75 l.OOE-01 1.20E+00 4.00E+00 W-8 L4188-08 43 Zn-65 3.10E+00 3.10E+00 l.OOE+01 W-8 L4188-08 43 Zr-95 5.00E-01 1.70E+00 5.70E+00 W-9 L4188-09 43 AcTh-228 1.02E+01 5.30E+00 1.70E+01 W-9 L4188-09 43 Ag-108m -1.28E+00 8.80E-01 3.20E+00 W-9 L4188-09 43 Ag-l lOm 4.OOE-0O 1.50E+00 5.20E+00 W-9 L4188-09 43 Ba-140 6.00E-01 2.90E+00 1.002+01 W-9 L4188-09 43 Be-7 O.OOE+00 9.00E+00 3.10E+01 W-9 L4188-09 43 Ce-141 -2.70E+00 1.602+00 5.40E+00 W-9 L4188-09 43 Ce- 144 2.OOE-0O 5.302+00 1.80E+01 W-9 L4188-09 43 Co-57 4.80E-0O 6.702-01 2.20E+00 W-9 L4188-09 43 Co-58 -1.00O+00 1.102+00 3.90E+00 W-9 L4188-09 43 Co-60 1.30E+00 1. O1E+00 3.602+00 W-9 L4188-09 43 Cr-51 -5.00E+00 1.10+01I 3.90E+01 W-9 L4188-09 43 Cs-134 -1.20E+00 1.202+00 4.30E+00 W-9 L4188-09 43 Cs- 137 5.00E-01 1.E10+00 3.702+00 W-9 L4188-09 43 Fe-59 2.OOE+00 2.60E+00 8.90E+00 W-9 L4188-09 43 H-3 2.70E+02 5.40E+02 1.602+03 W-9 L4188-09 43 1-131 -1.50E+00 3.302+00 1.20E+01 W-9 L4188-09 43 K-40 -4.00E+00 1.702+01 6.00E+01 W-9 L4188-09 43 La-140 7.00E-01 3.30E+00 1.20E+01 W-9 L4188-09 43 Mn-54 3.00E-01 1.20E+00 4.00E+00 W-9 L4188-09 43 Nb-95 -1.501E+00 1.30E+00 4.80E+00 W-9 L4188-09 43 Ru-103 -1.40E+00 1.20E+00 4.20E+00 W-9 L4188-09 43 Ru-106 -7.OOE+00 1.002+01 3.602+01 W-9 L4188-09 43 Sb-124 8.OOE-01 3.10E+00 I.IOE+01 W-9 LU188-09 43 Sb-125 1.80E+00 2.60E+00 8.802+00 W-9 L4188-09 43 Se-75 -1.50E+00 1.30E+00 4.502+00 W-9 L4188-09 43 Zn-65 7.90E+00 4.50E+00 1.50E+01 W-9 L4188-09 43 Zr-95 -7.OOE-01 1.80E+00 6.40E+00 w-l0 L4188-10 43 AcTh-228 6.OOE-01 3.50E+00 2.602+01 w-1o L4188-10 43 Ag-108m 6.60E-01 6.00E-01 2.00E+00 w-10 L4188-10 43 Ag-l lOm -1.22E+00 9.30E-01 3.30E+00 W-10 L4188-10 43 Ba-140 -1 .OOE-01 1.50E+00 5.20E+00 w-Io L4188-10 43 Be-7 -2.902+00 5.80E+00 2.00E+01 w-I0 UA188-10 43 Ce- 141 -6.102+00 2.00E+00 7.00E+00 w-10 L4188-10 43 Ce-144 2.50E+00 4.10E+00 1.40E+01 w-lo L4188-10 43 Co-57 1.30E-01 5.10E-01 1.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-224

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-lO L4188-10 43 Co-58 -3.50E-01 7.70E-01 2.70E+O0 W-1O L4188-10 43 Co-60 9.40E-01 7.20E-01 2.40E+O0 W-1O L4188-10 43 Cr-51 -5.1OE+00 7.40E+00 2.50E+0O W-1O L4188-10 43 Cs-134 -8.OOE-01 7.OOE-01 2.50E+00 W.1O L4188-10 43 Cs-137 -7.00E-01 7.60E-01 2.70E+00 W-10 L4188-10 43 Fe-59 -9.OOE-01 1.60E+00 5.70E+00 W-10 L4188-10 43 H-3 1.80E+02 5.40E+02 1.60E+03 W-1o L4188-10 43 1-131 -1.50E+00 2.10E+00 7.10E+00 W.1o L4188-10 43 K-40 8.OOE+00 1.20E+01 4.1OE+01 W-1O L4188-10 43 La-140 -I.OOE-01 1.70E+00 6.OOE+00 W.1o L4188-10 43 Mn-54 -4.40E-01 6.90E-01 2.40E+00 W-10 L4188-10 43 Nb-95 3.20E-01 8.80E-01 3.OOE+00 W-1O L4188-10 43 Ru-103 -9.70E-01 7.70E-01 2.70E+00 W-10 L4188-10 43 Ru-106 -5.50E+00 6.70E+00 2.30E+0O w.10 L4188-10 43 Sb-124 -2.20E+00 1.80E+00 6.60E+00 W-10 L4188-10 43 Sb-125 4.OOE-01 1.70E+00 5.90E+00 W-10 L4188-10 43 Se-75 -9.60E-01 8.90E-01 3.IOE+00 W-10 L4188-10 43 Zn-65 7.20E+00 2.90E+00 9.60E+00 W-10 L4188-10 43 Zr-95 -I.OOE+00 1.20E+00 4.20E+00 W-11 L4188-11 43 AcTh-228 1.09E+01 4.10E+00 1.30E+0O W-1l L4188-11 43 Ag-108m -5.90E-01 8.20E-01 2.90E+00 W-1 [4188-11 43 Ag-ll0m 8.OOE-01 1.50E+00 5.OOE+00 W-1 I L4188-11 43 Ba-140 3.70E+00 2.30E+00 7.50E+00 W-1I [4188-11 43 Be-7 -1.50E+00 9.30E+00 3.20E+0I W-lI [4188-11 43 Ce-141 -9.OOE-01 1.40E+00 4.70E+00 W-l1 L4188-11 43 Ce-144 -7.OOE+00 6.50E+00 2.20E+01 W-lI L4188-11 43 Co-57 6.80E-01 8.20E-01 2.70E+00 W-lI L4188-11 43 Co-58 1.40E+00 I.IOE+00 3.60E+00 W-1I L4188-11 43 Co-60 -9.OOE-01 I.OOE+00 3.80E+00 W-ll L4188-11 43 Cr-51 -9.OOE+00 l.lOE+0 3.70E+OI W-lI L4188-11 43 Cs-134 9.OOE-01 l.lOE+00 3.60E+00 W-l1 L4188-11 43 Cs-137 8.OOE-01 l.OOE+O0 3.40E+00 W-lI1 L4188-11 43 Fe-59 3.90E+00 2.20E+00 7.20E+00 W-lI L4188-11 43 H-3 3.80E+02 5.40E+02 1.60E+03 W-l1 [4188-11 43 1-131 3.10E+00 3.10E+00 l.OOE+01 W-l1 [4188-11 43 K-40 -2.20E+01 1.60E+01 5.80E+01 W-lI L4188-11 43 La-140 4.30E+00 2.60E+00 8.60E+00 W-lI L4188-11 43 Mn-54 -9.OOE-01 I.IOE+00 4.OOE+00 W-1l L4188-11 43 Nb-95 -1.70E+00 1.30E+00 4.70E+00 W-l1 L4188-11 43 Ru-103 -5.OOE-01 1.20E+00 4.20E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-225

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-Ii L4188-11 43 Ru-106 -8.20E+00 9.50E+00 3.40E+01 W-li L4188-11 43 Sb-124 -1.501+00 2.80E3+00 I .OOE3+0 W-l1 L4188-11 43 Sb-125 2.80E3+00 2.60E-,-00 8.70E+00 W-ll L4188-11 43 Se-75 9.OOE-01 1.30E1,-00 4.4013-00 W-l1 L4188-11 43 Zn-65 9.701E+00 3.70E3+00 I1.20E+01 W-11 L4188-11 43 Zr-95 2.50E+00 1.901E+00 6.50E3+00 W-12 L4188-12 43 AcTh-228 -1.90E3+00 4. 101+00 1.40E+01 W-12 L4188-12 43 Ag-108m 1.40E-01 8.20E3-01 2.80E+00 W-12 L4188-12 43 Ag-l lOIm 4.001E-01 I1.20E3+00 4.30Ei-00 W-12 L4188-12 43 Ba-140 0.OOE2+00 2.001E+00 7.20E3+00 W-12 L4188-12 43 Be-7 -2.OOE+00 8.50E3+00 2.90E3+01 W-12 L4188-12 43 Ce-141 1.20E+00 1.60E1i-00 5.20E3+00 W-12 L4188-12 43 Ce-144 -3.JOE-,00 5.201E+00 1.80E+01 W-12 LA188-12 43 Co-57 3.801E-01 6.60E-01 2.20E+00 W-12 L4188-12 43 Co-58 -6.00OE-01 9.70E3-01 3.50E3+00 W-12 L4188-12 43 Co-60 I1.771E+00 9.80E3-01 3.20E+00 W-12 L4188-12 43 Cr-51 I1.05E+01 9.90E3+00 3.30E-i01 W-12 L4188-12 43 Cs-134 2.06E3+00 9.60E-01 3.10OE+00 W-12 L4188-12 43 Cs-137 -2.601E+00 1.1OE3+00 3.901E+00 W-12 L4188-12 43 Fe-59 5.OOE-01 2.201E+00 7.70E+00 W-12 L4188-12 43 H-3 1.50E+02 5.40E+02 1.60E-t-03 W-12 L4188-12 43 1-131 2.70E+00 2.80E3+00 9.40E+00 W-12 LA188-12 43 K-40 -1 .401E+01 1.30E+01 4.60E3+01 W-12 LA188-12 43 La-140 0.OOE3+00 2.301E+00 8.30E+O0 W-12 L4188-12 43 Mn-54 -7.001E-02 9.70E3-01 3.40E3+00 W-12 L4188-12 43 Nb-95 -4.70E+00 1.401E+00 5.30E-i-00 W-12 L4188-12 43 Ru-103 -1.1OE-+00 1.OOE+00 3.60E+00 W-12 L4188-12 43 Ru-106 1.60E+00 9. 101+00 3.IOE+01 W-12 L4188-12 43 Sb-124 1.OE1+00 2.40E+00 8.50E+00 W-12 LA188-12 43 Sb-125 -1.50E3+00 2.40E3+00 8.50E3+00 W-12 LA188-12 43 Se-75 -2.001E-01 1.20E+00 4.20E1i-00 W-12 LA188-12 43 Zn-65 1.091E+01 3.90E3+00 I1.20E+01 W-12 L4188-12 43 Zr-95 -1.I 10+00 I1.601E+00 5.80E3+00 W-13 LA188-13 43 AcTh-228 -6.OOE-01 3.80E+00 1.301E+01 W-13 LA188-13 43 Ag-108m -5.IOE-01 5.40E-01 I1.90E+00 W-13 L4188-13 43 Ag-I lOm -1.37E+00 9.90E1-01 3.50E+00 W-13 L4188-13 43 Ba-140 3.OOE-01 1.50E+00 5.40E+00 W-13 L4188-13 43 Be-7 2.40E-,-00 6.20E+00 2.IO0E+01 W-13 L4188-13 43 Ce-141 1.801E+00 1.IOE3+00 3.601E+00 W-13 L4188-13 43 Ce-144 -L OOE-01 3.90E3+00 1.301E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-226

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-13 LA188-13 43 Co-57 -6.90E-01 4.90E-01 1.70E+00 W-13 LA188-13 43 Co-58 -8.00E-01 6.90E-01 2.50E+00 W-13 LA188-13 43 Co-60 6.10E-01 7.402-01 2.50E+00 W-13 LA188-13 43 Cr-51 -3.40E+00 7.40E+00 2.50E+01 W-13 LA188-13 43 Cs-134 -4.10E-01 6.80E-01 2.40E+00 W-13 LA188-13 43 Cs-137 -4.40E-01 7.40E-01 2.60E+00 W-13 LA188-13 43 Fe-59 -6.00E-01 1.50E+00 5.40E+00 W-13 LA188-13 43 H-3 4.30E+02 5.40E+02 1.60E+03 W-13 LA188-13 43 1-131 -1.50E+00 2.20E+00 7.702+OO W-13 LA188-13 43 K-40 4.00E+00 1.20E+01 4.OOE+01 W-13 LA188-13 43 La-140 3.002-01 1.80E+00 6.20E+00 W-13 LA188-13 43 Mn-54 0.00+00 7.00E-01 2.40E+00 W-13 LA188-13 43 Nb-95 -6.90E-01 7.80E-01 2.80E+00 W-13 LA188-13 43 Ru-103 -1.83E+00 7.60E-01 2.80E+00 W-13 L4188-13 43 Ru-106 -3.302+00 6.60E+00 2.30E+01 W-13 LA188-13 43 Sb-124 1.60E+00 1.80E+00 6.102+00 W-13 LA188-13 43 Sb-125 7.00E-01 1.80E+00 5.902+00 W-13 LA188-13 43 Se-75 1.20E+00 8.80E-01 2.90E+00 W-13 LU188-13 43 Zn-65 -1.40E+00 1.90E+00 6.70E+00 W-13 LA188-13 43 Zr-95 -2.002-01 1.IOE+00 4.002+00 W-14 LA188-14 43 AcTh-228 4.10E+00 5.20E+00 1.80E+01 W-14 LA188-14 43 Ag-108m 4.80E-01 7.30E-01 2.50E+00 W-14 LA188-14 43 Ag-I lOm -8.00E-01 1.30E+00 4.50E+00 W-14 LA188-14 43 Ba-140 -2.002-01 2.30E+00 8.30E+00 W-14 LA188-14 43 Be-7 -2.40E+00 8.20E+00 2.80E+01 W-14 LA188-14 43 Ce-141 -4.40E+00 2.302+00 8.00E+00 W-14 LA188-14 43 Ce-144 -2.00E+00 4.60E+00 1.60E+01 W-14 LA188-14 43 Co-57. 1.40E-01 6.20E-01 2.10E+00 W-14 LU188-14 43 Co-58 3.90E-01 9.60E-01 3.30E+00 W-14 LU188-14 43 Co-60 3.002-01 1.IOE+00 3.702+00 W-14 U4188-14 43 Cr-51 2.20E+00 9.60E+00 3.20E+01 W-14 LA188-14 43 Cs-134 -6.00E-01 1.10E+00 3.902+00 W-14 14188-14 43 Cs-137 -4.30E-01 9.70E-01 3.40E+00 W-14 14188-14 43 Fe-59 4. 10E+00 2.20E+00 7.10E+00 W-14 UA188-14 43 H-3 1.IOE+02 5.302+02 1.60E+03 W-14 LA188-14 43 1-131 5.30E+00 2.90E+00 9.50E+00 W-14 L4188-14 43 K-40 -1.002+01 1.702+01 6.00E+01 W-14 L4188-14 43 La-140 -3.002-01 2.70E+00 9.60E+00 W-14 LA188-14 43 Mn-54 -5.00E-01 1.OOE+00 3.60E+00 W-14 L4188-14 43 Nb-95 -5.002-01 1.IOE+00 4.00E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-227

Indiana Michigan Power Co., DC Cook Nuclear Plant kadiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

W-14 L4188-14 43 Ru-103 -1.OOE+00 *IOE+00 3.80E+O00 W-14 L4188-14 43 Ru-106 5.80E+00 9. 10E+00 3.101E+01 W-14 L4188-14 43 Sb-124 2.80E+00 2.40E3+00 8.20E+00 W-14 L4188-14 43 Sb-125 -5.001E-01 2.40E+00 8.40E+00 W-14 L4188-14 43 Se-75 I .OOE-01 I. lOE+00 3.80E+00 W-14 L4188-14 43 Zn-65 9.40E+00 3.60E.00 1.20E+01 W-14 L4188-14 43 Zr-95 I1.80E+O0 1.70E+00 5.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-228

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

Ws SW'-'- L2993-01 AcTh-228 -4.001E-01 3.60E+00 1.20E+01 SW'-'- L2993-01 Ag-108m 8.601E-01 5.50E-01 I1.80E-i00 SW'-'- L2993-01 Ag-I lOm 5.OOE-02 9.40E-01 3.20E+00 SWL-l L2993-01 Ba-140 7.OOE-01 2.80E+00 9.70E+00 SWL-l L2993-01 Be-7 1.1 lE+01 6.80E+00 2.20E+01 SWL-l L2993-01 Ce-141 -7.OOE-01 1.50E+00 4.90E+00 SW'-'- L2993-01 Ce-144 -3.60E+00 3.70E+00 1.30E+01 SWL-I L2993-01 Co-57 I1.50E-01 4.80E-01 I1.60E+00 SWL-I L2993-01 Co-58 3.20E-01 7.10E-01 2.40E+00 SWL-I L2993-01 Co-60 -4.OOE-02 7.OOE-01 2.50E+00 SWL-I L2993-01 Cr-5I -1.93E+01 9.70E+00 3.40E+01 SWL-I L2993-01 Cs-134 5.OOE-02 6.60E-01 2.30E+00 SWL-I L2993-01 Cs-137 L OOE-02 6.70E-01 2.30E+00 SWL-1 L2993-01 Fe-59 -1I.90E+00 2.40E+00 8.60E+00 SWL-i L2993-01 1-131 -1I.90E+00 6.50E+00 2.20E+01 SWL-1 L2993-01 K-40 I1.301E+01 1.20E+01 3.90E+01 SWL-1 L2993-01 La-140 8.00OE-01 3.20E+00 1.lOE3+01 SWL-1 L2993-01 Mn-54 -6.50E-01 7.OOE-01 2.40E+00 SWL-1 L2993-01 Nb-95 -2.70E-i00 1.40E+O0 5.OOE+00 SWL-1 L2993-01 Ru-103 -8.OOE-01 9.1OE-01 3.20E+00 SWL-1 L2993-01 Ru-106 -6.20E+00 6.50E+00 2.30E+01 SWL-I L2993-01 Sb-124 -2. 10E+O0 1.90E-i-00 6.903+O00 SWL-I L2993-01 Sb-125 I1.60E+00 1.70E+00 5.801E+00 SWL-1 L2993-01 Se-75 7.50E-01 9.lOE-0l 3.001E+00 SWL-1 L2993-01 Zn-65 2.40E+00 1.30E+00 4.30E+00 SwL-I L2993-01 Zr-95 -l1.50E+00 I1.40E+00 4.80E+00 SWL-2 L2993-02 Aclh-228 I1.90E+00 3.30E+00 1.lOE+01 SWL-2 L2993-02 Ag-108m 5.90E-01 5.60E-01 1.90E+00 SWL-2 L2993-02 Ag-t lOm -6.70E-01 8.80E-01 3. 10E+00 SWL-2 L2993-02 Ba- 140 1.IOE1+00 2.80E+00 9.80E+00 SWL-2 L2993-02 Be-7 2.10OE+00 6.801E+00 2.30E+01 SWL-2 L2993-02 Ce-141 5.OOE-01 2.OOE+00 6.601E+00 SWL-2 L2993-02 Ce-144 -8.40E+00 3.90E+00 I1.30E+01 SWL-2 L2993-02 Co-57 -ILOOE-02 5.OOE-01 I1.70E+00 SWL-2 L2993-02 Co-58 2.60E-01 8.201E-01 2.80E+00 SWL-2 L2993-02 Co-60 9.00E-0l 6.90E-01 2.30E+00 SWL-2 L2993 -02 Cr-51 -7.90E+00 9.80E+00 3.40E+01 SWL-2 12993-02 Cs-134 -l.OIE+00 7.30E-01 2.60E+O0 SWL-2 L2993-02 Cs-137 - I. lE+O0 7.OOE-01 2.50E+O00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-229

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-2 L2993-02 Fe-59 -4.OOE-0O 2.40E+OO 8.50E+00 SWL-2 L2993-02 1-131 -5.50E+00 6.50E+00 2.20E+01 SWL-2 L2993-02 K-40 1.80E+01 1.20E+0I 3.90E+0I SWL-2 L2993-02 La-140 1.30E+00 3.30E+00 I . IOE+OI SWL-2 L2993-02 Mn-54 1.80E-0O 6.90E-01 2.30E+00 SWL-2 L2993-02 Nb-95 -2.00E-01 1.20E+00 4.30E+00 SWL-2 L2993-02 Ru-103 -9.50E-01 9.20E-01 3.20E+00 SWL-2 L2993-02 Ru-106 -8.50E+O0 6.50E+00 2.30E+0I SWL-2 L2993-02 Sb- 124 -1.60E+00 1.90E+00 6.80E+00 SWL-2 L2993-02 Sb-125 I.1OE+00 1.70E+00 5.80E+O0 SWL-2 L2993-02 Se-75 3.OOE-02 9.20E-01 3. IOE+00 SWL-2 L2993-02 Zn-65 -4.OOE-01 2.30E+00 8.OOE+00 SWL-2 L2993-02 Zr-95 6.OOE-Oi 1.30E+00 4.40E+00 SWL-3 L2993-03 AcTh-228 4.40E+00 3.90E+00 1.30E+0I SWL-3 L2993-03 Ag-108m 1.29E+00 4.90E-0O 1.60E+OO SWL-3 L2993-03 Ag-I lOm -I.OOE-0O 8.60E-0O 3.OOE+O0 SWL-3 L2993-03 Ba-140 -3.90E+O0 2.40E+00 9.00E+O0 -

SWL-3 L2993-03 Be-7 -6.OOE+00 6.30E+00 2.20E+01 SWL-3 L2993-03 Ce-141 2.00E-01 I .80E+OO 6.20E+00 SWL-3 L2993-03 Ce-144 -3.00E-0I 3.30E+00 1.IOE+0I SWL-3 L2993-03 Co-57 -4.50E-01 6.60E-0O 2.20E+00 SWL-3 L2993-03 Co-58 -6.00E-0O 7.00E-01 2.50E+00 SWL-3 L2993-03 Co-60 6.90E-0O 6.20E-01 2.10E+O0 SWL-3 L2993-03 Cr-SI -1.03E+01 9.101E+00 3.10E+0I SWL-3 L2993-03 Cs-134 4.70E-0O 6.20E-01 2.1OE+00 SWL-3 L2993-03 Cs-137 2.80E-01 6.50E-0I 2.20E+00 SWL-3 L2993-03 Fe-59 2. 10OE+OO 2.20E3+00 7.50E+00 SWL-3 L2993-03 1-131 6.70E+00 5.90E+00 2.00E+0O SWL-3 L2993-03 K-40 -3.OOE+00 1.20E+0O 4.20E+01 SWL-3 L29Y3-03 La-140 -4.50E+00 2.80E+OO l.00E+01 SWL-3 L2993-03 Mn-54 O.OOE+00 5.30E-OI 1.80E+00 SWL-3 L2993-03 Nb-95 -5.30E-OI 9.30E-0O 3.20E+00 SWL-3 L2993-03 Ru-103 -1.33E+00 8.50E-0I 3.OOE+00 SWL-3 L2993-03 Ru-106 7.50E+OO 6.20E+00 2.10E+0l SWL-3 L2993-03 Sb-124 -3.80E+O0 1.80E+00 6.90E+00 SWL-3 L2993-03 Sb-125 3.OOE-0O 1.60E+0O 5.30E+00 SWL-3 L2993-03 Se-75 5.101E-0I 7.20E-OI 2.40E+00 SWL-3 L2993-03 Zn-65 -3.OOE+00 1.40E+00 5.00E+00 SWL-3 L2993-03 7Z-95 -4.OOE-0l 1.40E+00 4.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-230

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg) sw1 L2175-01 05 AcTh-228 4.00E-01 2.50E+00 9.50E+00 SWL-1 L2175-01 05 Ag-108m -1.50E-01 3.20E-01 1.10E+00 SWLI-1 L2175-01 05 Ag-l1Orm 5.90E-0O 5.70E-01 1.90E+00 SWL-1 L2175-01 05 Ba-140 -4.10E+00 2.70E+00 9.60E+00 SWL-1 L2175-01 05 Be-7 6.40E+00 4.60E+00 1.50E+01 SWL-I L2175-01 05 Ce-141 5.00E-01 1.60E+00 5.30E+00 SWL-I L2175-01 05 Ce-144 -3.50E+00 2.10E+00 7.30E+00 SWL-I L2175-01 05 Co-57 4.20E-01 2.80E-01 9.20E-01 SWL-I L2175-01 05 Co-58 -2.40E-01 4.60E-01 1.60E+00 SWL-1 L2175-0i 05 Co-60 2.00E-02 4.10E-01 1.40E+00 SWL-1 L2175-01. 05 Cr-51 1.60E+00 7.30E+00 2.40E+01 SWL-I L2175-01 05 Cs-134 8.30E-0O 4.00E-01 1.30E+00 SWL-1 L2175-01 05 Cs-137 -2.50E-01 4.00E-01 1.40E+00 SWL-1 L2175-01 05 Fe-59 6.002-01 1.70E+00 5.60E+00 SWL-1 L2175-01 05 1-131 8.30E+00 9.10E+00 3.00E+01 SWL-1 L2175-01 05 K-40 -1.OOE+00 9.002+00 3.00E+01 SWL-1 L2175-01 05 La-140 -4.80E+00 3.10E+00 I.IOE+01 SWL-1 L2175-01 05 Mn-54 -3.20E-0O 3.60E-01 1.30E+00 SWL-1 L2175-01 05 Nb-95 2.90E-01 7.10E-01 2.40E+00 SWL-1 L2175-01 05 Ru-103 -2.17E+00 6.40E-01 2.30E+00 SWL-1 L2175-01 05 Ru-106 3.20E+00 3.80E+00 1.30E+01 SWL-1 L2175-01 05 Sb-124 l.OOE-01 1.302+00 4.30E+00 SWL-1 L2175-01 05 Sb-125 1.60E-01 9.70E-01 3.20E+00 SWL-I L2175-01 05 Se-75 3.20E-01 4.80E-01 1.60E+00 SWL-1 L2175-01 05 Zn-65 -1.50E+00 1.10O+00 3.90E+00 SWL-1 L2175-01 05 Zr-95 1.02E+00 9.10E-01 3.00E+00 SWL,2 L2175-02 05 AcTh-228 1.30E+00 2.30E+00 7.80E+00 SWL-2 L2175-02 05 Ag-108m -3.30E-01 3.40E-01 1.202+00 SWL-2 L2175-02 05 Ag-I lOm -4.70E-01 6.00E-01 2.102+00 SWL-2 L2175-02 05 Ba-140 -2.00E-01 3.60E+00 1.20E+01 SWL-2 L2175-02 05 Be-7 -7.00E-01 5.10E+00 1.70E+01 SWL-2 L2175-02 05 Ce-141 1.40E+00 1.70E+00 5.70E+00 SWL-2 L2175-02 05 Ce-144 2.30E+00 2.60E+00 8.50E+00 SWL-2 L2175-02 05 Co-57 -2.10E-01 3.30E-01 I.IOE+00 SWL-2 L2175-02 05 Co-58 -5.60E-01 5.702-01 2.00E+00 SWL-2 L2175-02 05 Co-60 4.00E-02 4.30E-01 1.50E+00 SWL-2 L2175-02 05 Cr-51 4.00E+00 8.50E+00 2.802+01 SWL-2 L2175-02 05 Cs-134 9.40E-01 4.80E-01 1.60E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-231

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-2 L2175-02 05 Cs- 137 -5.50E-0l 4.40E-0O 1.50E+00 SWL-2 L2175-02 05 Fe-59 -8.OOE-0l 1.70E+00 5.90E+O0 SWL-2 L2175-02 05 1-131 -1 .OOE+00 1.20E+01 4.00E+01 SWL-2 L2175-02 05 K-40 6.80E+00 8.50E+00 2.80E+01 SWL-2 L2175-02 05 La- 140 -2.00E-01 4. IOE+00 1.40E+01 SWL-2 L2175-02 05 Mn-54 -9.90E-01 4.50E-0O 1.60E+00 SWL-2 L2175-02 05 Nb-95 3.00E-0O 1.20E+00 4.00E+00 SWL-2 L2175-02 05 Ru-103 -1.94E+00 7.20E-0O 2.50E+00 SWL-2 L2175-02 05 Ru-106 1.50E+00 4.10E+00 1.40E+01 SWL-2 L2175-02 05 Sb-124 -1.30E+O0 1.50E+00 5.10E+00 SWL-2 L2175-02 05 Sb-125 -8.00E-01 l .lOE+00 6.00E+00 SWL-2 L2175-02 05 Se-75 -2.30E-O1 6.20E-0O 2.10E+00 SWL-2 L2175-02 05 Zn-65 -8.OOE-01 1.50E+00 5.00E+00 SWL-2 L2175-02 05 Zr-95 2.00E-0O 9.40E-0O 3.20E+00 SWL-3 L2175-03 05 Acll-228 -1.80E+00 2.90E+00 9.80E+00 SWL-3 L21 75-03 05 Ag-108m -4.00E-0O 3. 1OE-01 1. O10+00 SWL-3 L2175-03 05 Ag- lOnm -1.15E+00 5.70E-01 2.00E+00 SWL-3 L2175-03 05 Ba-140 1.40E+00 3. 10E+00 1.10E+01 SWL-3 L2175-03 05 Be-7 -2.50E+00 4.60E+00 1.60E+01 SWL-3 L2175-03 05 Ce-141 -2.00E-01 1.60E+00 5.202+00 SWL-3 L2 175-03 05 Ce-144 0.OOE+00 2.20E+00 7.40E+00 SWL-3 L2175-03 05 Co-57 8.00E-02 2.80E-01 9.30E-01 SWL-3 L2175-03 05 Co-58 -9.OOE-02 4.80E-01 1.60E+00 SWL-3 L2175-03 05 Co-60 -4.90E-01 4.20E-0O 1.50E+00 SWL-3 L2175-03 05 Cr-51 1.13E+0O 7.70E+00 2.502+01 SWL-3 L2175-03 05 Cs-134 5.90E-0O 4.00E-01 1.302+00 SWL-3 L2175-03 05 Cs-137 -8.90E-0O 4.20E-01 1.50E+00 -

SWL-3 L2175-03 05 Fe-59 -1.40E+00 1.70E3+00 5.802+00 SWL-3 L2175-03 05 1-131 1.902+01 l.10+01 3.502+01 SWL-3 L2175-03 05 K-40 1.25E+01 9.IOE+00 3.002+01 SWL-3 L2175-03 05 La- 140 1.60E+00 3.60E+00 1.202+01 SWL-3 L2175-03 05 Mn-54 -1.80E-0O 3.80E-01 1.302+00 SWL-3 L2175-03 05 Nb-95 3.00E-01 1.70E+00 5.60E+00 SWL-3 L2175-03 05 Ru-103 -2.37E+00 6.70E-0O 2.40E+00 SWL-3 L2175-03 05 Ru- 106 -1.OOE+00 4.00E+00 1.30E+01 SWL-3 L2175-03 05 Sb- 124 -3.00E-01 1.30E+00 4.50E+00 SWL-3 L2175-03 05 Sb- 125 -1.88E+00 9.80E-0O 5.80E+00 SWL-3 L2175-03 05 Se-75 -3.50E-0I 4.902-01 1.702+00 SWL-3 L21 75-03 05 Zn-65 -8.00E-0O 1.20E3+00 4.002+00 SWL-3 L2175-03 05 Zr-95 1.78E+00 9.50E-01 3.102+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-232

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-1 L2314-01 09 AcTh-228 O.OOE+00 3.50E+00 1.20E+0O SWL-I L2314-01 09 Ag-108m 1.80E-0I 4.60E-01 1.60E+00 SWL-1 L2314-01 09 Ag-l lOm 1.05E+00 7.90E-01 2.70E+00 SWL-1 L2314-01 09 Ba-140 -3.10E+00 2.40E+00 8.60E+00 SWL-1 L2314-01 09 Be-7 6.10E+00 5.70E+00 I.90E+01 SWL-I L2314-01 09 Ce-141 1.50E+00 1.20E+00 3.90E+00 SWL-1 L2314-01 09 Ce-144 -3.OOE+00 3.1OE+00 1.OOE+0I SWL-1 L2314-01 09 Co-57 1.70E-01 4.OOE-01 1.30E+00 SWL-1 L2314-01 09 Co-58 -1.OOE-01 6.40E-01 2.20E+00 SWL-I L2314-01 09 Co-60 -1.80E-01 6.30E-01 2.20E+0O SWL-1 L2314-01 09 Cr-51 2.10E+00 8.OOE+00 2.70E+01 SWL-I L2314-01 09 Cs-134 -3.20E-01 5.70E-01 2.00E+OO SWL-I L2314-01 09 Cs-137 -1.18E+00 5.70E-01 2.OOE+OO SWL-I L2314-01 09 Fe-59 1.90E+00 2.20E+00 7.30E+OO SWL-I L2314-Oi 09 1-131 8.1OE+00 S.SOE+00 1.80E+01 SWL-I L2314-01 09 K-40 2.OOE+00 I.lOE+0I 3.80E+0O SWL-I L2314-01 09 La-140 -3.60E+00 2.70E+00 9.90E+0O SWL-1 L2314-01 09 Mn-54 -3.50E-0O 5.10E-01 1.80E+OO SWL-I L2314-01 09 Nb-95 7.50E-0O 8.80E-01 2.90E+OO SWL-I L2314-01 09 Ru-103 -2.30E-01 8.10E-01 2.80E+00 SWL-I L2314-01 09 Ru-106 3.90E+00 5.50E+00 1.80E+01 SWL-I L2314-01 09 Sb-124 3.00E-0O 1.80E+00 6.1OE+O0 SWL-1 L2314-01 09 Sb-125 8.OOE-01 1.50E+00 4.70E+O0 SWL-1 L2314-01 09 Se-75 -3.30E-0I 6.70E-01 2.30E+00 SWL-1 L2314-01 09 Zn-65 1.20E+O0 1.70E+00 5.60E+00 SWL-1 L2314-01 09 Zr-95 1.30E+00 1.20E+00 3.90E+00 SWL-3 L2314-03 09 AcTh-228 3.20E+00 3.30E+00 1.1OE+01 SWL-3 L2314-03 09 Ag-108m -1.30E-01 5.40E-01 1.90E+00 SWL-3 L2314-03 09 Ag-l lOm l.OOE-01 l.OOE+00 3.40E+00 SWL-3 L2314-03 09 Ba-140 -1.90E+00 3.40E+00 1.20E+0O SWL-3 L2314-03 09 Be-7 4.80E+00 7.10E+00 2.40E+01 SWL-3 L2314-03 09 Ce-141 -4.60E+00 2.20E+00 7.60E+00 SWL-3 L2314-03 09 Ce-144 -1.50E+00 3.50E+00 1.20E+0I SWL-3 L2314-03 09 Co-57 2.70E-0O 4.40E-01 1.50E+00 SWL-3 L2314-03 09 Co-58 -1.92E+00 8.IOE-01 3.OOE+00 SWL-3 L2314-03 09 Co-60 2.60E-01 8.80E-01 3.OOE+O0 SWL-3 L2314-03 09 Cr-51 2.50E+00 9.80E+00 3.30E+01 SWL-3 L2314-03 09 Cs-134 -1.44E+00 8.80E-01 3.10E+0O

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-233

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-3 L2314-03 09 Cs-137 1.40E+00 7.20E-01 2.40E+00 SWL-3 L2314-03 09 Fe-59 5.00E-01 3.00E+00 1.00+01 SWL-3 L2314-03 09 1-131 -5.40E+00 7.10E+00 2.40E+01 SWL-3 L2314-03 09 K-40 0.OOE+00 1.40E+01 4.70E+01 SWL-3 L2314-03 09 La- 140 -2.20E+0O 3.90E+00 1.402+01 SWL-3 L2314-03 09 Mn-54 5.70E-01 7.20E-01 2.40E+00 SWL-3 L2314-03 09 Nb-95 -2.00E+00 1.102+00 3.90E+00 SWL-3 L2314-03 09 Ru-103 -1.40E+00 1.30E+00 4.70E+00 SWL-3 L2314-03 09 Ru-106 8.00E+00 6.60E+00 2.20E+01 SWL-3 L2314-03 09 Sb-124 -8.00E-01 2.30E+00 8.10E+00 SWL-3 L2314-03 09 Sb-125 1.30E+00 1.80E+00 5.90E+00 SWL-3 L2314-03 09 Se-75 5.40E-01 8.90E-01 3.002+00 SWL-3 L2314-03 09 Zn-65 -1.10O+00 1.60E+00 5.80E+00 SWL-3 L2314-03 09 Zr-95 5.00E-01 1.40E+00 4.90E+00 SWL-I L2516-01 11 AcTh-228 9.90E+00 4.20E+00 1.30E+01 SWL-I L2516-01 11 Ag-108m 1.23E+00 9.30E-01 3.10E+00 SWL-I L2516-01 11 Ag-l lOm -1.00-01 l.50O+00 5.50E+00 SWL-I L2516-01 11 Ba- 140 -1.90E+00 3.00E+00 1.102+01 SWL-I L2516-01 11 Be-7 -3.00+00 l.lOE+01 3.70E+01 SWL'- L2516-01 11 Ce-141 -2.20E+00 2. 1OE+00 7.40E+00 SWL,- L2516-01 11 Ce-144 -2.OOE-01 6.10E+00 2.10E+01 SWI-. L2516-01 11 Co-57 3.30E-01 7.60E-01 2.60E+00 SWL-' L2516-01 11 Co-58 -1.80E+00 1.20E+00 4.50E+00 SWL-- L2516-01 11 Co-60 -5.00E-01 1.20E+00 4.30E+00 SWL-I L2516-01 11 Cr-51 -1.10O+01 1.40E+01 4.80E+01 -

SWL-I L2516-01 11 Cs-134 1.80E+00 1.I0E+00 3.50E+00 SWL-I L2516-01 11 Cs-137 -1.20E+00 1.10+00 4.20E+00 SWL-I L2516-01 11 Fe-59 1.50E+00 3.90E+00 1.402+01 SWL-I L2516-01 11 H-3 7.OOE+02 3.80E+02 1.E10+03 SWL-I L2516-01 11 1-131 1.70E+00 5.50E+00 1.90E+01 SWL-I L2516-01 11 K-40 3.40E+01 1.90E+01 6.30E+01 SWL-I L2516-01 11 La- 140 -2.10E+00 3.40E+00 1.30E+01 SWL-I L2516-01 11 Mn-54 -3.OOE-01 1.002+00 3.80E+00 SWL-I L2516-01 11 Nb-95 -2.60E+00 1.50E+00 5.60E+00 SWL-I L2516-01 11 Ru-103 -1.OOE+00 1.40E+00 4.90E+00 SWL--I L2516-01 11 Ru-106 2.40E+01 1.10E+01 3.60E+01 SWL- I L2516-01 11 Sb-124 -2.1 OE+00 3.OOE+00 1.20E+01 SWL-I L2516-01 11 Sb-125 2.80E+00 3.00E+00 1.00E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-234

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-I L2516-01 11 Se-75 -2.20E+00 1.20E+00 4.40E+00 SWL-I L2516-01 11 Zn-65 1.36E+01 4.80E+00 l.50E+01 SWL-I L2516-01 11 Zr-95 -2.80E+00 2.30E+00 8.60E+00 SWL-2 L2516-02 11 AcTh-228 7.10E+00 3.OOE+00 9.40E+00 SWL-2 L2516-02 11 Ag-108m 8.OOE-01 6.40E-01 2.10E+00 SWL-2 L2516-02 11 Ag-lOim -1.OOE+00 1.20E+00 4.20E+00 SWL-2 L2516-02 11 Ba-140 4.90E+00 2.80E+00 9.30E+00 SWL-2 L2516-02 11 Be-7 -1.29E+01 7.90E+00 2.80E+01 SWL-2 L2516-02 11 Ce-141 -3.20E+00 2.70E+00 9.20E+O0 SWL-2 L2516-02 11 Ce-144 3.OOE-01 4.60E+00 1.60E+0O SWL-2 L2516-02 11 Co-57 -L.OOE-0I 5.90E-01 2.OOE+00 SWL-2 L2516-02 11 Co-58 -1.31E+00 9.OOE-01 3.30E+00 SWL-2 L2516-02 11 Co-60 1.22E+00 8.OOE-01 2.70E+00 SWL-2 L2516-02 11 Cr-51 -9.OOE+00 l.lOE+OI 3.90E+O1 SWL-2 L2516-02 11 Cs-134 1.17E+00 7.80E-01 2.60E+00 SWL-2 L2516-02 11 Cs-137 -1.13E+00 8.80E-01 3.10E+00 SWL-2 L2516-02 11 Fe-59 -4.20E+00 2.90E+00 1.1OE+O1 SWL-2 L2516-02 11 H-3 6.OOE+01 3.60E+02 1. IOE+03 SWL-2 L2516-02 11 1-131 -4.70E+00 6.OOE+00 2.10E+01 SWL-2 L2516-02 11 K-40 1.60E+01 1.40E+01 4.60E+0O SWL-2 L2516-02 11 La-140 5.60E+00 3.30E+00 1.IOE+01 SWL-2 L2516-02 11 Mn-54 2.70E-01 8.20E-01 2.80E+00 SWL-2 L2516-02 11 Nb-95 -I.OOE-O1 1.20E+00 4.IOE+00 SWL-2 L2516-02 11 Ru-103 -2.I1OE+00 I.IOE+00 4.OOE+00 SWL-2 L2516-02 11 Ru-106 9.70E+00 7.50E+00 2.50E+0O SWL-2 L2516-02 11 Sb-124 -1.90E+00 2.40E+00 8.70E+00 SWL-2 L2516-02 11 Sb-125 2.30E+00 2.OOE+00 6.80E+00 SWL-2 L2516-02 11 Se-75 1.40E+00 l.10E+00 3.60E+00 SWL-2 L2516-02 11 Zn-65 3.OOE-01 2.40E+00 8.30E+00 SWL-2 L2516-02 11 Zr-95 1.20E+00 1.60E+00 5.40E+00 SWL-3 L2516-03 11 AcTh-228 5.60E+00 4.60E+00 1.50E+0O SWL-3 L2516-03 11 Ag-108m -4.1OE-01 7.60E-01 2.70E+00 SWL-3 L2516-03 11 Ag-lOrm i.OOE-01 1.30E+00 4.70E+00 SWL-3 L2516-03 11 Ba-140 -1.40E+00 3.OOE+O0 I.IOE+0O SWL-3 L2516-03 11 Be-7 -2.22E+01 9.OOEi00 3.30E+0O SWL-3 L2516-03 11 Ce-141 -1.50E+00 1.90E+00 6.70E+00 SWL-3 L2516-03 11 Ce-144 -4.OOE+00 5.40E+00 1.80E+01 SWL-3 L2516-03 11 Co-57 8.OOE-01 7.10E-01 2.40E+00 SWL-3 L2516-03 11 Co-58 -2.40E+00 I.OOE+00 3.90E+00 SWL-3 L2516-03 11 Co-60 -8.60E-01 9.40E-01 3.50E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-235

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-3 L2516-03 Cr-51 -1.20E+01 1.20E+01 4.30E+01 SWL-3 L2516-03 Cs-134 8.00E-01 l.OOE+00 3.40E+00 SWL-3 L2516-03 Cs-137 1.20E-0l 9.00E-0O 3.10E+00 SWL-3 L2516-03 Fe-59 1.90E+00 3.OOE+00 l.OOE+01 SWL-3 L2516-03 H-3 3.60E+02 3.70E+02 l. lOE+03 SWL-3 L2516-03 1-131 1.60E+00 6.60E+00 2.20E+OI SWL-3 L2516-03 K-40 3.20E+01 1.50E+01 4.90E+01 SWL-3 L2516-03 La-140 -1.60E+00 3.40E+00 1.30E+01 SWL-3 L2516-03 Mn-54 2.1 1E+00 9.70E-0O 3. 1OE+00 11 SWL-3 L2516-03 11 Nb-95 7.00E-01 1.50E+00 5.00E+00 SWL-3 L2516-03 11 Ru- 103 -1.20E+00 1.20E+00 4.40E+00 SWL-3 L2516-03 11 Ru-106 9.80E+00 9.10E+00 3.1OE+0O SWL-3 L2516-03 11 Sb-124 -1.60E+00 3.00E+00 1.10E+01 SWL-3 L2516-03 11 Sb-125 -6.OOE-0O 2.40E+00 8.20E+00 SWL-3 L2516-03 11 Se-75 1.30E+00 1.20E+OO 4.10E+00 SWL-3 L2516-03 11 Zn-65 -4.70E+00 2.1OE+00 7.90E+00 SWL-3 L2516-03 11 Zr-95 3.60E+00 1.80E+00 5.70E+00 -

16 16 SWL-I L2765-01 11 AcTh-228 3. 1OE+00 3.40E+00 1.30E+01 SWL-I L2765-01 11 Ag-108m 6.60E-01 6.80E-01 2.30E+00 16 SWL-1 L2765-01 16 Ag-l lOm 3.00E-01 l .10+00 3.90E+00 16 SWL-I L2765-01 11 Ba-140 l.OOE+00 3.30E+00 1.20E+01 16 SWL-I L2765-01 11 Be-7 I .90E+00 7.90E+00 2.70E+01 16 SWL-I L2765-01 11 Ce-141 8.00E-01 1.80E+00 6.00E+00 161 SWL-I L2765-01 11 Ce-144 1.20E+00 4.70E+00 1.60E+01 16 SWL-I L2765-01 Co-57 2.20E-01 6.10E-01 2.OOE+00 SWL-I L2765-01 16 Co-58 1.03E+00 9.20E-01 3.10E+00 SWL-I L2765-01 16 16 Co-60 6.80E-0O 8.70E-01 3.OOE+00 SWL-' L2765-01 16 Cr-51 -1.OOE+00 1.20E+0O 4.00E+01 SWL-I L2765-01 16 16 Cs-134 8.10E-OI 7.70E-01 2.60E+00 SWL-I L2765-01 16 Cs-137 -4.10-01 8.OOE-01 2.80E+00 SWL- I L2765-01 Fe-59 -6.20E+00 3. 10E+00 1.20E+01 SWL-1 L2765-01 1-131 -8.OOE-01 7.90E+00 2.70E+01 SWL-l L2765-01 K-40 1.10E+01 1.50E+01 5.OOE+01 SWL-I L2765-01 La-140 1.20E+00 3.80E+00 1.30E+01 SWL-I L2765-01 Mn-54 6.00E-01 8.60E-0O 2.90E+00 SWL-I L2765-01 Nb-95 -2.40E+00 1.60E+00 5.60E+00 SWL-I L2765-01 Ru-103 -1.80E+00 1.20E+00 4.20E+00 SWL-I L2765-01 Ru-106 -2.50E+00 7.80E+00 2.70E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-236

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-I L2765-01 16 Sb-124 -1.20E+00 2.40E+00 8.90E+00 SWL-I L2765-01 16 Sb-125 4.OOE-0O 2.20E+00 7.40E3+00 SWL-' L2765-01 16 Se-75 1.90E+00 1.1OE+00 3.60E+00 SWL'- L2765-01 16 Zn-65 -1.20E+00 1.80E+00 6.40E+00 SWL-' L2765-01 16 Zr-95 -1.30E+00 1.60E+00 5.80E+00 SWL-2 L2765-02 16 AcTh-228 -4.70E+00 3.40E+00 1.20E+01 SWL-2 L2765-02 16 Ag-108m -9.80E-0O 5.80E-0O 2. 10E+00 SWL-2 L2765-02 16 Ag-I lrOm -4.00E-01 1.OOE+00 3.50E+00 SWL-2 L2765-02 16 Ba-140 7. 1OE+00 3.50E+00 1.1OE+0O SWL-2 L2765-02 16 Be-7 6.90E+00 8.OOE+00 2.70E+0O SWL-2 L2765-02 16 Ce-141 -1.OOE+00 1.60E+00 5.40E+00 SWL-2 L2765-02 16 Ce-144 1.50E+00 4.10E+00 1.40E+01 SWL-2 L2765-02 16 Co-57 4.OOE-02 5.30E-0O 1.80E+00 SWL-2 L2765-02 16 Co-58 -5.30E-0O 7.70E-0O 2.70E+00 SWL-2 L2765-02 16 Co-60 6.70E-0O 7.40E-0O 2.50E+00 SWL-2 L2765-02 16 Cr-51 3.50E+01 1.70E+01 5.30E+01 SWL-2 L2765-02 16 Cs-134 1.1 E+00 7.10E-0O 2.40E+00 SWL-2 L2765-02 16 Cs-137 -I.OOE-0O 7.50E-0I 2.60E+00 SWL-2 L2765-02 16 Fe-59 -1.30E+00 2.70E+00 9.80E+00 SWL-2 L2765-02 16 1-131 -9.30E+00 8.50E+00 3.OOE+0I SWL-2 L2765-02 16 K-40 1.90E+0O 1.30E+01 4.30E+01 SWL-2 L2765-02 16 La-140 8.20E+00 4.OOE+00 1.30E+0O SWL^2 L2765-02 16 Mn-54 O.OOE+00 7.90E-0O 2.70E+00 SWL-2 L2765-02 16 Nb-95 -3.OOE-01 1.lOE+00 3.90E+00 SWL-2 L2765-02 16 Ru-103 -1.IOE+00 1.lOE+00 3.70E+00 SWL-2 L2765-02 16 Ru-106 9.90E+00 6.90E+00 2.30E+0O SWL-2 L2765-02 16 Sb-124 -1.60E+00 2.20E+00 8.OOE+00 SWL-2 L2765-02 16 Sb-125 -1.40E+00 1.90E+00 6.70E+00 SWL-2 L2765-02 16 Se-75 -3.80E-0O 9.90E-0O 3.40E+00 SWL-2 L2765-02 16 Zn-65 -1.OOE+00 1.50E+00 5.40E+00 SWL-2 L2765-02 16 Zr-95 -1.20E+00 1.50E+00 5.20E+00 SWL-3 L2765-03 16 AcTh-228 6.30E+00 2.80E+00 8.90E+00 SWL-3 L2765-03 16 Ag-108m -2.30E-0O 6.40E-01 2.20E+00 SWL-3 L2765-03 16 Ag-I lOm -4.00E-0O l.lOE+00 4.OOE+00 SWL-3 L2765-03 16 Ba-140 5.30E+00 3.40E+00 l.lOE+0O SWL-3 L2765-03 16 Be-7 -1.70E+00 7.80E+00 2.70E+01 SWL-3 L2765-03 16 Cc-141 6.00E-01 1.60E+00 5.50E+00 SWL-3 L2765-03 16 Ce- 144 -4.50E+00 4.20E+00 1.50E+01 SWL-3 L2765-03 16 Co-57 4.50E-01 7.30E-0O 2.40E+00 SWL-3 L2765-03 16 Co-58 -1.86E+00 8.50E-0I 3.20E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-237

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) . (pCi/kg)

SWL-3 L2765-03 16 Co-60 -9.30E-01 7.90E-01 2.90E+00 SWL-3 L2765-03 16 Cr-SI -5.OOE+00 1.20E+01 3.90E+01 SWL-3 L2765-03 16 Cs-134 -1.OOE-02 7.90E-01 2.80E+00 SWL-3 L2765-03 16 Cs-137 -4.20E-01 8.20E-01 2.90E+00 SWL-3 L2765-03 16 Fe-59 -1.50E+00 2.90E+00 l.OOE+01 SWL-3 L2765-03 16 1-131 4.90E+00 9.OOE+00 3.00E+01 SWL-3 L2765-03 16 K-40 -I.OOE+00 1.50E+01 5.10E+01 SWL-3 L2765-03 16 La- 140 6.10E+00 3.90E+00 1.30E+01 SWL-3 L2765-03 16 Mn-54 1.12E+00 6.80E-01 2.20E+00 SWL-3 L2765-03 16 Nb-95 7.OOE-0O 1.30E+00 4.30E+00 SWL-3 L2765-03 16 Ru-103 -3.OOE-0l 1.lOE+00 3.80E+00 SWL-3 L2765-03 16 Ru-106 I .40E+00 7.30E+00 2.50E+01 SWL-3 L2765-03 16 Sb-124 -1.20E+00 2.20E+00 8.10E+00 SWL3 L2765-03 16 Sb-125 -1.20E+00 1.90E+OO 6.70E+00 SWL-3 L2765-03 16 Se-75 7.90E-01 9.10E-01 3.00E+00 SWL-3 L2765-03 16 Z~n-65 6.OOE-0O 2.30E+00 7.90E+00 SWL-3 L2765-03 16 Zr-95 -3.20E+00 1.60E+00 6.OOE+00 SWrll W3233-04 20 H-3 -1.37E+03 4.OOE+02 1.30E+03 SWLr2 W3233-05 20 H-3 -1.70E+02 4.20E+02 1.30E+03 SWL-3 12233-06 20 H-3 -5.20E+02 4.IOE+02 1.30E+03 SWL-I L3458-01 29 Acib-228 5.20E+00 3.10E+00 2.20E+01 SWL-I L3458-01 29 Ag-108m 3.80E-01 6.80E-01 2.30E+00 SWL-I W3458-01 29 Ag- lOnm -I.OOE-01 1.OOE+00 3.70E+00 SWL-l W3458-01 29 Ba-140 -2.40E+00 2.50E+00 9.60E+00 SWL-I W3458-01 29 Be-7 -2.60E+00 7.70E+00 2.70E+01 SWL-' W3458-01 29 Cc-141 -2.30E+00 2.70E+00 9.10E+00 SW'-r W3458-01 29 Ce-144 2.10E+00 4.60E+00 1.60E+01 SW--' W3458-01 29 Co-57 8.80E-01 7.60E-01 2.50E+00 SWL-' W3458-01 29 Co-58 l .OOE-02 9. 1OE-01 3.20E+00 SWL-I W3458-01 29 Co-60 2.80E-01 8.70E-01 3.10E+00 SWL-I L3458-01 29 Cr-51 1.40E+01 1.1OE+01 3.70E+01 SWL-' W3458-01 29 Cs-134 2.10E-01 8.60E-0I 3.00E+00 SWL-I W3458-01 29 Cs-137 3.60E-01 8.70E-01 3.00E+00 SWL-I W3458-01 29 Fe-59 -4.00E-01 2.90E+00 l.OOE+01 SWL-1 W3458-01 29 1-131 -1.70E+00 5.90E+00 2.00E+01 SWL-I W3458-01 29 K-40 2.40E+01 1.50E+01 5.00E+01 SWLr- W3458-01 29 La-140 -2.70E+00 2.90E+00 l. OE+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-238

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-I L3458-01 29 Mn-54 -4.SOE-01 8.OOE-01 2.90E+00 SWL-I L3458-01 29 Nb-95 -9.OOE-01 1.20E+00 4. 1OE+00 SWL- L3458-01 29 Ru-103 -2.60E+O0 1.1OE+00 4.1OE+00 SWL-I L3458-01 29 Ru-106 -1.07E+01 7.90E1+00 2.90E+0O SWL-I L3458-01 29 Sb-124 -3.60E+00 2.50E+00 9.60E+00 SWLA L3458-01 29 Sb-125 -1.30E+00 2.00E+00 7.10E+O0 SWL- L3458-01 29 Se-75 -4.70E-01 9.50E-01 3.30E+00 SWL-- L3458-01 29 Zn-65 1.80E+00 2.60E+00 8.60E+00 SWL-I L3458-01 29 Zr-95 -I.OOE+O0 1.60E+00 5.90E+00 SWL-2 L3458-02 29 AcTh-228 4.50E+00 3.90E+00 1.30E+0O SWL-2 L3458-02 29 Ag-108m -1.07E+O0 5.80E-01 2.10E+O0 SWL-2 L3458-02 29 Ag-I Orm 6.OOE-02 9.90E-01 3.40E+O0 SWL-2 L3458-02 29 Ba-140 1.20E+00 2.30E+00 8.OOE+00 SWL-2 L3458-02 29 Be-7 -5.10E+00 6.70E+00 2.30E+O1 SWL-2 L3458-02 29 Ce-141 -3.10E+00 2.20E+00 7.40E+O0 SWL-2 L3458-02 29 Ce-144 8.OOE-01 3.90E+00 1.30E+OI SWL-2 L3458-02 29 Co-57 I.OOE-02 5. 1OE-01 1.70E+O0 SWL-2 L3458-02 29 Co-58 -4.40E-01 7.50E-01 2.60E+O0 SWL-2 L3458-02 29 Co-60 2.40E-01 7.50E-01 2.60E+O0 SWL-2 L3458-02 29 Cr-51 -I.10E+00 9.20E+00 3.10E+01 SWL-2 L3458-02 29 Cs-134 6.80E-01 6.90E-01 2.30E+00 SWL-2 L3458-02 29 Cs-137 -1.37E+00 7.50E-01 2.70E+00 SWL-2 L3458-02 29 Fe-59 -I.IOE+00 2.50E+00 8.70E+00 SWL-2 L3458-02 29 1-131 2.80E+00 4.40E+00 1.50E+0O SWL-2 L3458-02 29 K-40 -l.OOE+00 1.30E+01 4.30E+01 SWL-2 L3458-02 29 La-140 1.40E+00 2.70E+00 9.20E+00 SWL-2 L3458-02 29 Mn-54 -1.70E-01 6.80E-01 2.40E+00 SWL-2 L3458-02 29 Nb-95 5.50E-01 9.80E-01 3.30E+00 SWL-2 L3458-02 29 Ru-103 -2.23E+00 9.10E-01 3.30E+00 SWL-2 L3458-02 29 Ru-106 9.00E-01 6.60E+00 2.30E+0I SWL-2 L3458-02 29 Sb-124 -S.OOE-0I I.90E+00 6.70E+00 SWL-2 L3458-02 29 Sb-125 0.OOE+00 1.70E+00 6.00E+00 SWL-2 L3458-02 29 Se-75 I.OOE-01 9.30E-01 3.10E+00 SWL-2 L3458-02 29 Zn-65 -8.OOE-01 1.50E+00 5.40E+O0 SWL-2 L3458-02 29 Zr-95 2.60E+00 1.30E+00 4.30E+00 SWL-3 L3458-03 29 AcTh-228 -4.20E+00 2.20E+00 8.20E+00 SWL-3 L3458-03 29 Ag-108m -7.60E-01 5.40E-01 l.90E+00 SWL-3 L3458-03 29 Ag-I 1lm -1.80E-01 9.30E-01 3.20E+00 SWL-3 L3458-03 29 Ba-140 O.OOE+00 2.20E+00 7.60E+O0 SWL-3 L3458-03 29 Be-7 4.90E+00 6.70E+00 2.30E+0I

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-239

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCilkg) (pCi/kg)

SWL-3 L3458-03 29 Ce-141 -4.OOE-01 1.60E+00 5.40E+00 SWL-3 L3458-03 29 Ce-144 2.90E+00 3.90E+00 1.30E+01 SWL-3 L3458-03 29 Co-57 2.50E-01 5.102-01 1.702+00 SWL-3 L3458-03 29 Co-58 -1.14E+00 7.80E-01 2.80E+00 SWL-3 L3458-03 29 Co-60 -6.50E-01 6.80E-01 2.502+00 SWL-3 L3458-03 29 Cr-51 1.46E+0l 8.50E+00 2.80E+01 SWL-3 L3458-03 29 Cs-134 2.70E-01 7.60E-01 2.60E+00 SWL-3 L3458-03 29 Cs- 137 8.OOE-02 6.70E-01 2.30E+00 SWL-3 L3458-03 29 Fe-59 4.00E-01 2. 10E+00 7.50E+00 SWL-3 L3458-03 29 1-131 4.10E+00 4.202+00 1.40E+01 SWL-3 L3458-03 29 K-40 -I1 1OE+01 1.10E+01 3.902+01 SWL-3 L3458-03 29 LA-140 O.OOE+00 2.50E+00 8.70E+00 SWL-3 L3458-03 29 Mn-54 -4.90E-01 6.70E-01 2.40E+00 SWL-3 L3458-03 29 Nb-95 -3.70E+00 1.40E+00 5.30E+00 SWL-3 L3458-03 29 Ru-103 1.802-01 8.30E-01 2.80E+00 SWL-3 L3458-03 29 Ru-106 -1.02E+01 6.50E+00 2.302+01 SWL-3 L3458-03 29 Sb- 124 4.00E-01 2.00E+00 7.00E+00 SWL-3 U2458-03 29 Sb- 125 2.00E-01 1.702+00 5.90E+00 SWL-3 W3458-03 29 Se-75 -7.90E-01 9.00E-01 3.10E+00 SWL-3 U3458-03 29 Zn-65 1.OOE-01 2.302+00 7.802+00 -

SWL-3 L3458-03 29 Zr-95 1.30E+00 1.30E+00 4.30E+00 SWL-1 L3732-01 33 Acll-228 -8.00E-01 3.60E+00 1.202+01 SWL-1 L3732-01 33 Ag-108m -3.70E-01 5.60E-01 1.90E+00 SWL-1 L3732-01 33 Ag-I lOm -1.20E+00 1.00+00 3.60E+00 SWL-1 L3732-01 33 Ba-140 -2.80E+00 2.90E+00 1. O10+01 SWL-- L3732-01 33 Be-7 2.50E+00 6.90E+00 2.402+01 SWL-I L3732-01 33 Ce- 141 -7.OOE-01 2.40E+00 8.00E+00 SWL-I L3732-01 33 Ce-144 -1.28E+01 6.20E+00 2.20E+01 SWL-1 L3732-01 33 Co-57 -6.00E-01 5. 10E-0I 1.80E+00 SWL-I L3732-01 33 Co-58 5.40E-01 7.90E-01 2.70E+00 SWL-I L3732-01 33 Co-60 1.11 E+00 7.302-01 2.40E+00 SWL-1 L3732-01 33 Cr-51 -6.00E+00 1.002+01 3.50E+01 SWL- I L3732-01 33 Cs- 134 -1.30E-01 6.60E-01 2.30E+00 SWL-I L3732-01 33 Cs- 137 -9.50E-OI 7.20E-01 2.602+00 SWL-I L3732-01 33 Fe-59 1.IOE+00 2.40E+00 8.40E+00 SWL- I L3732-01 33 1-131 1.IOE+00 6.40E+00 2.20E+01 SWL-I L3732-01 33 K-40 1.OOE+00 1.20E+01 4.20E+01 SWL-I L3732-01 33 La-140 -3.20E+00 3.40E+00 1.20E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-240

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-I L3732-01 33 Mn-54 -6.30E-01 7.30E-01 2.60E+00 SWL-I L3732-01 33 Nb-95 -1.40E+00 L.OOE+00 3.70E+00 SWL-I L3732-01 33 Ru-103 -1.83E+00 9.70E-01 3.50E+00 SWL-I L3732-01 33 Ru-106 -2.30E+00 6.50E+00 2.20E+0O SWL-I L3732-01 33 Sb-124 -2.40E+00 2.OOE+00 7.60E+00 SWL-I L3732-01 33 Sb-125 2.30E+00 1.80E+00 5.90E+00 SWL-I L3732-01 33 Se-75 -3.30E-01 9.80E-01 3.30E+00 SWL-I L3732-01 33 Zn-65 2.80E+00 2.10E+00 6.70E+00 SWL-I L3732-01 33 Zr-95 3.OOE+00 1.40E+00 4.50E+00 SWL-2 L3732-02 33 AcTh-228 -I.IOE+0O 3.70E+00 1.30E+0O SWL-2 L3732-02 33 Ag-108m 5.20E-01 7.70E-01 2.60E+00 SWL-2 L3732-02 33 Ag-I lOm -2.OOE-01 1.30E+00 4.70E+00 SWL-2 L3732-02 33 Ba-140 3.60E+00 3.50E+00 1.20E+0O SWL-2 L3732-02 33 Be-7 -7.30E+00 9.20E+00 3.20E+01 SWL-2 L3732-02 33 Ce-141 -2.IOE+00 1.70E+00 5.90E+00 SWL-2 L3732-02 33 Ce-144 2.50E+00 5.40E+00 1.80E+0O SWL-2 L3732-02 33 Co-57 I.IOE-01 6.90E-01 2.30E+O0 SWL-2 L3732-02 33 Co-58 -5.OOE-0O I.IOE+0O 3.90E+00 SWL-2 L3732-02 33 Co-60 6.70E-01 9.90E-01 3.40E+00 SWL-2 L3732-02 33 Cr-SI 1.60E+01 1.40E+01 4.60E+01 SWL-2 L3732-02 33 Cs-134 1.IOE+00 9.80E-01 3.30E+00 SWL-2 L3732-02 33 Cs-137 -4.80E-01 9.80E-01 3.50E+00 SWL-2 L3732-02 33 Fe-59 -2.OOE-01 3.OOE+00 I.IOE+0O SWL-2 L3732-02 33 1-131 2.80E+00 8.10E+00 2.70E+OI SWL-2 L3732-02 33 K-40 -2.OOE+00 1.50E+01 5.20E+01 SWL-2 L3732-02 33 La-140 4.10E+00 4.OOE+00 1.40E+01 SWL-2 L3732-02 33 Mn-54 -I.O1E+00 9.80E-01 3.50E+00 SWL-2 L3732-02 33 Nb-95 -2.10E+00 1.50E+00 5.50E+00 SWL-2 L3732-02 33 Ru-103 -1.40E+00 1.60E+00 5.80E+00 SWL-2 L3732-02 33 Ru-106 -8.OOE-01 9.1OE+00 3.20E+0O SWL-2 L3732-02 33 Sb-124 1.70E+00 2.70E+00 9.40E+00 SWL-2 L3732-02 33 Sb-125 1.60E+00 2.30E+00 7.90E+00 SWL-2 L3732-02 33 Se-75 -5.OOE-01 1.30E+00 4.40E+00 SWL-2 L3732-02 33 Zn-65 -3.50E+00 2.20E+00 8.1OE+00 SWL-2 L3732-02 33 Zr-95 -1.80E+00 1.80E+00 6.40E+00 SWL-3 U3732-03 33 AcTh-228 6.20E+00 2.1OE+00 6.70E+00 SWL-3 U3732-03 33 Ag-108m -I.OOE-0I 4.60E-01 1.60E+O0 SWL-3 12732-03 33 Ag-I lOm -2.50E-01 7.80E-01 2.70E+00 SWL-3 12732-03 33 Ba-140 2.30E+00 2.40E+00 8.OOE+00 SWL-3 L3732-03 33 Be-7 1.06E+01 6.OOE+00 2.OOE+OI

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-241

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-3 L3732-03 33 Ce-141 5.OOE-01 I1.30E+00 4.20E+00 SWL-3 L3732-03 33 Cc-144 3.30E+00 3.101E+00 1.OOE+01 SWL-3 L3732-03 33 Co-57 -4.OOE-01 6.101E-01 2.10E+00 SWL-3 L3732-03 33 Co-58 4.60E-01 6.40E3-01 2.20E3+00 SWL-3 L3732-03 33 Co-60 1.20E-01 5.50E-01 I1.90E+00 SWL-3 W3732-03 33 Cr-51 2.40E+00 8.301E+00 2.80E+01 SWL-3 W3732-03 33 Cs-134 7.00E-02 5.60E-01 1.901E+00 SWL-3 L3732-03 33 Cs-137 7.20E-01 5.901E-01 2.OOE+00 SWL-3 L3732-03 33 Fe-59 2.00E-01 2.20E3+00 7.60E+00 SWL-3 L3732-03 33 1-131 3.101E+00 7.801E+00 2.60E+01 SWL-3 W3732-03 33 K-40 -1.I1OE+01 1.1OE+01 4.OOE-i-01 SWL-3 W3732-03 33 La- 140 2.60E+00 2.70E3+00 9.20E+00 SWL-3 L3732-03 33 Mn-54 -1.90E-01 5.301E-01 I1.8013-00 SWL-3 L3732-03 33 Nb-95 -6.00E-01 1.30E+00 4.30E3+00 SWL-3 L3732-03 33 Ru-103 -3.70E-01 8.10E-01 2.801E+00 SWL-3 L3732-03 33 Ru-106 4.101E+00 5.80E+00 1.901E+01 SWL-3 L3732-03 33 Sb-124 1.90E+00 I1.701E+00 5.70E+00 SWL-3 L3732-03 33 Sb-125 -2.10E+00 1.401E+00 4.90E+00 SWL-3 L3732-03 33 Se-75 -2.60E-01 6.60E3-01 2.30E+00 SWL-3 W3732-03 33 Zn-65 3.40E+00 1.80E+00 5.60E+00 SWL-3 13732-03 33 Zr-95 -1.40E+00 I1.20E+00 4.30E3+00 SWL-1 L3951-01 38 AcTh-228 4.OOE-01 3.80E+00 1.40E+01 SWL-I 13951-01 38 Ag- 108m O.OOE+00 7.60E3-01 2.70E+00 SWL-I L3951-01 38 Ag-i lOIm 1.20E+00 1.40E-,-00 4.801E+00 SWL-1 L3951-01 38 Ba-140 1.30E+00 3.201E+00 I1.20E3+01 SWL- I L3951-01 38 Be-7 -2.30E+00 9.80E+00 3.601E+01 SWL-l 13951-01 38 Ce-141 -3.80E+00 2.40E+00 8.70E+00 SWL-I L3951-01 38 Ce-144 2.30E+00 6.80E+00 2.30E+01 SWL-I L3951-01 38 Co-57 -1.80E-01 9.201E-01 3.20E+00 SWL-1 L3951-01 38 Co-58 -2.00E-01 1.101E+00 4.OOE+00 SWL-l L3951-01 38 Co-60 7.00E-01 1.OOE1,-00 3.60Ei-00 SWL-I L3951-01 38 Cr-51 -I.OOE+00 1.301E+01 4.701E+01 SWL-1 L3951-01 38 Cs-134 -6.00E-02 8.701E-01 3.30E+00 SWL- 1 L3951-01 38 Cs-137 -6.00E-01 1.OOE3+00 3.801E+00 SWL- I L3951-01 38 Fe-59 1.60E+00 3.OOE+00 1.IOE+01 SWL-I W3951-01 38 1-131 3.30E+00 6.70E+00 2.30E+01 SWL-I W3951-01 38 K-40 -1.90E+01 I1.201E+01 5.OOE+01 SWL-I W3951-01 38 La-140 1.50E+00 3.70E+00 1.401E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-242

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-I L3951-01 38 Mn-54 9.50E-01 9.70E-01 3.30E+00 SWL-I L3951-01 38 Nb-95 2.OOE-01 1.40E+O0 5.IOE+00 SWL-I L3951-01 38 Ru-103 -1.20E+00 1.30E+00 4.80E+O0 SWL-I L3951-01 38 Ru-106 4.30E+00 8.IOE+00 2.90E+0l SWL-I L3951-01 38 Sb-124 -3.90E+00 2.80E+00 1.20E+0I SWL-I L3951-01 38 Sb-125 -I.IOE+00 2.50E+00 9.10E+00 SWL-I L3951-01 38 Se-75 I.OOE-01 1.50E+00 -5.20E+00 SW-1I L3951-O1 38 Zn-65 4.20E+00 3.80E+00 1.30E+01 SWL-I L3951-01 38 Zr-95 1.OOE+00 1.80E+00 6.30E+00 SWL-2 L3951-02 38 AcTh-228 3.80E+00 3.20E+00 1.IOE+01 SWL-2 L3951-02 38 Ag-108m 3.80E-01 7.80E-01 2.70E+00 SWL-2 L3951-02 38 Ag-i lOm -9.OOE-01 1.20E+00 4.70E+00 SWL-2 L3951-02 38 Ba-140 I.OOE+O0 3.50E+00 1.30E+01 SWL-2 L3951-02 38 Be-7 -5.90E+00 9.10E+00 3.50E+0I SWL-2 L3951-02 38 Ce-141 -I.OOE+00 2.30E+00 8.OOE+00 SWL-2 L3951-02 38 Ce-144 3.60E+00 6.70E+00 2.30E+01 SWL-2 L3951-02 38 Co-57 8.90E-01 8.50E-01 2.90E+00 SWL-2 L3951-02 38 Co-58 2.1OE-01 9.30E-01 3.40E+00 SWL-2 L3951-02 38 Co-60 3.50E-01 8.10E-01 3.OOE+O0 SWL-2 L3951-02 38 Cr-51 -1.OOE+OO 1.30E+01 4.60E+0I SWL-2 L3951-02 38 Cs-134 1.40E+00 I.IOE+00 3.80E+00 SWL-2 L3951-02 38 Cs-137 -1.60E-01 9.30E-01 3.50E+00 SWL-2 L3951-02 38 Fe-59 1.30E+00 2.60E+00 9.80E+00 SWL-2 L3951-02 38 1-131 -8.20E+00 6.70E+00 2.50E+01 SWL-2 L3951-02 38 K-40 -2.00E+00 1.20E+01 4.50E+01 SWL-2 L3951-02 38 La-140 1.20E+00 4.OOE+00 1.50E+01 SWL-2 L3951-02 38 Mn-54 -8.OOE-01 8.90E-01 3.50E+00 SWL-2 L3951-02 38 Nb-95 -1.20E+00 1.50E+00 5.80E+00 SWL-2 L3951-02 38 Ru-103 -3.OOE-01 1.30E+00 4.90E+00 SWL-2 L3951-02 38 Ru-106 -1.57E+01 9.70E+00 3.80E+0I SWL-2 L3951-02 38 Sb-124 3.50E+00 2.50E+00 8.30E+00 SWL-2 L3951-02 38 Sb-125 4.1OE+00 2.50E+00 8.30E+00 SWL-2 L3951-02 38 Se-75 -9.OOE-01 1.30E+00 4.60E+00 SWL-2 L3951-02 38 Zn-65 -3.00E-01 2.70E+00 9.80E+00 SWL-2 L3951-02 38 Zr-95 I.OOE+O0 2.20E+00 7.80E+00 SWL-3 L3951-03 38 Aclb-228 3.30E+00 3.50E+00 1.20E+01 SWL-3 L3951-03 38 Ag-108m 6.30E-01 9.OOE-01 3.1OE+OO SWL-3 L3951-03 38 Ag-I lOm -1.OOE+OO 1.30E+00 4.80E+OO SWL-3 L3951-03 38 Ba-140 I.IOE+00 3.20E+00 1.20E+01 SWL-3 L3951-03 38 Be-7 -3.90E+00 9.30E+00 3.40E+01

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-243

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-3 L3951-03 38 Cc-141 -3.00E-01 2.60E+00 9.10E+00 SWL-3 L3951-03 38 Ce-144 -2.00E-01 7.40E3+00 2.60E+01 SWL-3 L3951-03 38 Co-57 l.OE-01 9.40E-01 3.20E+00 SWL-3 L3951-03 38 Co-58 -1.60E+00 1.20E+00 4.60E+00 SWL-3 L3951-03 38 Co-60 3.00E-01 1.10+00 4.00E+00 SWL-3 L3951-03 38 Cr-5 1.80E+01 1.50E+01 4.90E+01 SWL-3 L3951-03 38 Cs- 134 3.20E-01 9.OOE-01 3.20E+00 SWL-3 L3951-03 38 Cs-137 -2.20E+00 1.OOE+00 4.10E+00 SWL-3 L3951-03 38 Fe-59 4.80E+00 3.OOE+00 9.80E+00 SWL-3 L3951-03 38 1-131 1.20E+01 7.20E+00 2.40E+01 SWL-3 L3951-03 38 K-40 -1.40E+01 1.1OE+01 4.50E+01 SWL-3 L3951-03 38 La-140 1.30E+00 3.70E+00 1.40E+01 SWL-3 L3951-03 38 Mn-54 -4.70E-01 9.70E-01 3.60E+00 SWL-3 L3951-03 38 Nb-95 -2.OOE-0I 2.30E+00 8.10E+00 SWL-3 L3951-03 38 Ru-103 1.40E+00 1.40E+00 4.70E+00 SWL-3 L3951-03 38 Ru-106 2.10E+00 9.20E+00 3.30E+01 SWL-3 L3951-03 38 Sb-124 -6.30E+00 2.502+00 1.102+01 SWL-3 L3951-03 38 Sb-125 2.00E+00 2.70E+00 9.20E+00 SWL-3 L3951-03 38 Se-75 -1.60E+00 1.40E+00 5.20E+00 SWL3 L3951-03 38 Zn-65 7.20E+00 4.30E+00 1.40E+01 SWL-3 L3951-03 38 Zr-95 -9.00E-01 1.70E+00 6.50E+00 SWL-- L3951-04 38 H-3 -2.60E+02 5.OOE+02 1.50E+03 SWL-2 L3951-05 38 H-3 -3.90E+02 4.90E+02 1.50E+03 SWL-3 L3951-06 38 H-3 4.80E+02 5.40E+02 1.60E+03 SWL-' L4232-01 42 AcTh-228 -2.00E+00 3.40E+00 1.20E+01 SWL-I L4232-01 42 Ag-108m 2.30E-01 4.70E-01 1.60E+00 SWL-I L4232-01 42 Ag-I lrOm -4.00E-02 7.80E-01 2.70E+00 SWL-1 L4232-01 42 Ba-140 1.90E+00 2.40E+00 8.10E+00 SWL-1 L4232-01 42 Be-7 5.80E+00 6.30E+00 2.10E+01 SWL-' L4232-01 42 Ce-141 -3.00E-01 1.50E+00 5.00E+00 SWL-1 L4232-01 42 Ce-144 -1.00E+00 3.40E+00 1.1OE+01 SWL-1 L4232-01 42 Co-57 8.40E-01 4.20E-01 1.40E+00 SWL--' L4232-01 42 Co-58 -1.24E+00 6.80E-01 2.50E+00 SWL-1 L4232-01 42 Co-60 2.40E-01 5.80E-01 2.00E+00 SWL-I L4232-01 42 Cr-51 1.03E+01 8.50E+00 2.80E+01 SWL-I L4232-01 42 Cs-134 -2.OOE-02 6.10E-01 2.10E+00 SWL-I L4232-01 42 Cs-137 -1.20E+00 6.50E-01 2.30E+00 SWL-I L4232-01 42 Fe-59 -6.00E-01 1.60E+00 5.70E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-244

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-1 L4232-OI 42 1-131 -2.OOE-01 5.40E+O0 1.80E+0O SWL-I L4232-01 42 K-40 1.IOE+0I LOOE+01 3.40E+01 SWL-I L4232-01 42 La-140 2.20E+O0 2.70E+00 9.30E+00 SWLI L4232-01 42 Mn-54 -4.90E-0O 5.60E-01 2.00E+00 SWL-I L4232-01 42 Nb-95 -1.30E+00 1.10E+O0 3.70E+00 SWL-I L4232-O1 42 Ru-103 8.30E-OI 8.OOE-01 2.70E+O0 SWL-1 L4232-O1 42 Ru-106 6.OOE-0O 5.80E+OO 2.OOE+01 SWL-I L4232-O1 42 Sb-124 -3.40E+O0 1.80E+00 6.70E+OO SWL-I L4232-O1 42 Sb-125 4.OOE+OO 1.50E+O0 5.OOE+0O SWL-I L4232-01 42 Se-75 6.40E-0O 7.OOE-O1 2.30E+O0 SWL-l L4232-01 42 Zn-05 5.70E+0O 2.40E+00 7.60E+O0 SWL-I L4232-01 42 Zr-95 2.OOE-OI 1.30E+OO 4.40E+00 SWL,2 L4232-02 42 AcTh-228 1.50E+O0 3.90E+OO 1.30E+01 SWL-2 L4232-02 42 Ag-lO8m 7.10E-01 5.90E-0 2.00E+00 SWL-2 L4232-02 42 Ag-llOm -5.00E-OI I.OOE+O0 3.50E+O0 SWL-2 L4232-02 42 Ba-140 -1.50E+O0 2.90E+00 L.1OE+0O SWL-2 L4232-02 42 Be-7 -1.77E+0O 7.30E+OO 2.60E+0O SWL-2 L4232-02 42 Ce-141 2.70E+00 1.50E+OO 4.90E+00 SWL-2 L4232-02 42 Ce-144 6.60E+O0 4.OOE+O0 1.30E+0O SWL-2 L4232-02 42 Co-57 -2.00E-02 5.20E-0O 1.70E+O0 SWL-2 L4232-02 42 CO-58 -7.101E-01 7.80E-0O 2.80E+O0 SWL-2 L4232-02 42 Co-60 1.07E+O0 7.OOE-0 2.30E+O0 SWL-2 L4232-02 42 Cr-51 I.OOE+0O L.OOE+O1 3.40E+01 SWL-2 L4232-02 42 Cs-134 3.90E-0O 6.70E-O1 2.30E+00 SWL-2 L4232-02 42 Cs-137 1.60E-01 7.20E-0 2.50E+OO SWL-2 L4232-02 42 Fe-59 2.40E+O0 1.90E+O0 6.30E+00 SWL-2 L4232-02 42 1-131 9.20E+00 6.20E+OO 2.OOE+01 SWL-2 LA232-02 42 K-40 1.50E+0O 1.20E+01 4.00E+01 SWL-2 L4232-02 42 La-140 -1.70E+OO 3.40E+00 1.20E+0O SWL-2 L4232-02 42 Mn-54 -6.80E-01 6.80E-01 2.40E+O0 SWL-2 L4232-02 42 Nb-95 -3.10E+O0 1.40E+00 5.IOE+00 SWL-2 L4232-02 42 Ru-103 4.30E-OI 9.60E-O1 3.30E+00 SWL-2 L4232-02 42 Ru-106 -4.20E+OO 6.70E+O0 2.30E+01 SWL-2 L4232-02 42 Sb-124 -6.00E-01 1.80E+00 6.40E+O0 SWL-2 L4232-02 42 Sb-125 O.OOE+00 1.80E+00 6.20E+00 SWL-2 L4232-02 42 Se-75 8.30E-01 9.70E-01 3.20E+OO SWL-2 L4232-02 42 Zn-65 -1.OOE-0O 2.1OE+OO 7.20E+OO SWL-2 L4232-02 42 Zr-95 -1.10E+00 1.40E+OO 4.90E+OO SWL-3 L4232-03 42 AcTh-228 -6.OOE-01 2.90E+00 L.OOE+OI SWL-3 L4232-03 42 Ag-108m 8.OOE-02 5.70E-01 2.OOE+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-245

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-3 L4232-03 42 Ag-l1lm O.OOE+O0 9.60E-01 3.30E+00 SWL-3 L4232-03 42 Ba-140 -3.60E+00 2.90E+00 1.IOE+O1 SWL-3 L4232-03 42 Be-7 -9.30E+00 7.20E+00 2.60E+01 SWL-3 L4232-03 42 Ce-141 1.OOE+00 1.60E+00 5.30E+00 SWL-3 L4232-03 42 Ce-144 -1.20E+00 4.20E+00 1.40E+01 SWL-3 L4232-03 42 Co-57 -3.30E-01 5.40E-01 1.80E+00 SWL-3 L4232-03 42 Co-58 -1.04E+00 7.90E-01 2.80E+00 SWL-3 L4232-03 42 Co-60 1.80E-01 7.60E-01 2.60E+00 SWL-3 L4232-03 42 Cr-SI 6.40E+00 9.90E+00 3.30E+O1 SWL-3 L4232-03 42 Cs-134 -6.30E-01 8.00E-01 2.80E+00 SWL-3 L4232-03 42 Cs-137 -1.40E-01 7.40E-01 2.60E+00 SWL-3 L4232-03 42 Fe-59 0.OOE+00 2.00E+00 7.00E+00 SWL-3 L4232-03 42 1-131 0.OOE+00 6.00E+00 2.OOE+01 SWL-3 L4232-03 42 K-40 -1.70E+01 1.IOE+01 4.00E+01 SWL-3 L4232-03 42 La-140 -4.20E+00 3.40E+00 1.20E+01 SWL-3 L4232-03 42 Mn-54 8.70E-01 7.20E-01 2.40E+00 SWL-3 L4232-03 42 Nb-95 1.OOE-0O 1.30E+00 4.30E+00 SWL-3 L4232-03 42 Ru-103 3.30E-01 9.70E-01 3.30E+00 SWL-3 L4232-03 42 Ru-106 1.47E+01 6.40E+00 2.10E+01 SWL-3 L4232-03 42 Sb-124 -1.40E+00 2.20E+00 8.OOE+00 SWL-3 L4232-03 42 Sb-125 -2.20E+00 1.80E+00 6.30E+00 SWL-3 L4232-03 42 Se-75 I.01E+OO 9.60E-01 3.20E+OO SWL-3 L4232-03 42 Zn-65 7.50E+00 2.70E+00 8.602+00 SWL-3 L4232-03 42 Zr-95 4.00E-01 1.402+00 4.70E+OO SWL-I L4438-01 46 AcTh-228 1.30E+00 3.10E+00 1.10E+01 SWL-l L4438-01 46 Ag-108m 6.OOE-01 5.20E-01 1.70E+00 SWL-1 L4438-01 46 Ag-I lOnm -2.OOE-01 9.OOE-01 3.10E+00 SWL-I L4438-01 46 Ba-140 4.20E+00 2.20E+00 7.10E+00 SWL-I L4438-01 46 Be-7 -1.IOE+00 6.00E+00 2.002+01 SWL-I L4438-01 46 Ce-141 1.40E+00 1.80E+00 5.90E+00 SWL-1 L4438-01 46 Ce-144 3.30E+00 3.80E+00 1.30E+01 SWL-I L4438-01 46 Co-57 O.OOE+00 4.90E-01 1.70E+00 SWL-1 L4438-01 46 Co-58 8.00E-02 7.70E-01 2.60E+00 SWL-1 L4438-01 46 Co-60 -3.40E-01 7.60E-01 2.60E+00 SWL-1 L4438-01 46 Cr-SI O.OOE+00 8.70E+00 2.90E+01 SWL-1 L4438-01 46 Cs-134 -8.00E-02 7.00E-01 2.40E+00 SWL-l L4438-01 46 Cs-137 -1.60E-01 6.80E-01 2.30E+00 SWL-I L4438-01 46 Fe-59 2.10E+00 1.60E+00 5.40E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-246

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SW'-' L4438-01 46 1-131 -8.20E+00 4.40E+00 1.60E+0O SWL-1 L4438-01 46 K-40 -5.OOE+00 1.OOE+0O 3.60E+01 SWL-1 L4438-01 46 La-140 4.90E+00 2.50E+00 8.10E+00 SWL-I L4438-01 46 Mn-54 -4.50E-0O 6.60E-01 2.30E+00 SWL-I L4438-01 46 Nb-95 -1.30E+00 1.20E+00 4. IOE+00 SWL-I L4438-01 46 Ru-103 -3.73E+00 8.40E-01 3. IOE+00 SWL-- L4438-01 46 Ru-106 -8.20E+00 6.20E+00 2.20E+01 SWL-I L4438-01 46 Sb-124 -2.10E+00 l .90E+00 7. IOE+00 SWL-' L4438-01 46 Sb-125 3.OOE+00 1.60E+00 5.20E+00 SWL-t L4438-01 46 Se-75 9.10E-01 8.70E-0O 2.90E+00 SWL-I L4438-01 46 Zn-65 2.OOE-0O 2.30E+00 7.70E+00 SWL'- L4438-01 46 Zr-95 8.OOE-0O 1.20E+00 4.OOE+00 SWL-2 L4438-02 46 AcTh-228 -3.50E+00 3.40E+00 1.20E+0O SWL-2 L4438-02 46 Ag-108m 1.20E-01 5.80E-0I 2.OOE+00 SWL-2 L4438-02 46 Ag-l lOIm -3.60E-01 9.OOE-0O 3.20E+00 SWL-2 L4438-02 46 Ba-140 3.OOE+00 2.50E+00 8.40E+00 SWL-2 L4438-02 46 Be-7 5. 1OE+00 6.80E+00 2.30E+0O SWL-2 L4438-02 46 Ce-141 8.OOE-01 1.60E+00 5.30E+00 SWL-2 L4438-02 46 Ce-144 -1.30E+00 3.90E+00 1.30E+0O SWL-2 L4438-02 46 Co-57 5.80E-01 5.OOE-01 1.70E+00 SWL-2 L4438-02 46 Co-58 5.80E-01 7.40E-0I 2.50E+00 SWL-2 L4438-02 46 Co-60 -6.OOE-02 6.60E-01 2.30E+00 SWL-2 L4438-02 46 Cr-51 -1.20E+O0 9.20E+00 3.20E+01 SWL-2 L4438-02 46 Cs-134 3.90E-0O 7.40E-0O 2.50E+00 SWL-2 L4438-02 46 Cs-137 -1.20E+00 7.20E-01 2.60E+00 SWL-2 L4438-02 46 Fe-59 1.40E3+00 1.70E+00 5.80E+00 SWL-2 L4438-02 46 1-131 -1.40E+00 4.60E+00 1.60E+01 SWL-2 L4438-02 46 K-40 -8.OOE+O0 1.30E+0O 4.40E+0O SWL-2 L4438-02 46 La-140 3.50E+00 2.90E+00 9.60E+00 SWL-2 L4438-02 46 Mn-54 -8.60E-01 6.30E-0O 2.30E+00 SWL-2 L4438-02 46 Nb-95 - 1.50E+00 1.lOE+00 3.90E+00 SWL-2 L4438-02 46 Ru-103 -2.05E+00 9.70E-0O 3.50E+00 SWL-2 L4438-02 46 Ru-106 -6.40E+00 6.50E+00 2.30E+01 SWL-2 L4438-02 46 Sb-124 -1.70E+00 2.OOE+00 7.40E+00 SWL-2 L4438-02 46 Sb- 125 -8.OOE-0O 1.80E+00 6.30E+00 SWL-2 U4438-02 46 Se-75 -7.00E-02 7.80E-01 2.70E+00 SWL-2 UA438-02 46 Zn-65 2.OOE-01 2.10E+O0 7. IOE+00 SWL-2 L4438-02 46 Zr-95 4.OOE-01 I.50E+00 5.30E+00 SWL-3 L4438-03 46 AcTh-228 4.40E+O0 3.50E+00 1.40E+01 SWL-3 L4438-03 46 Ag-108m -4.40E-0O 6.40E-0O 2.20E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-247

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCilkg) (pCi/kg)

SW[-3 L4438-03 46 Ag- lOim -8.0OE-01 1.20E+00 4.20E+00 SWL-3 L4438-03 46 Ba-140 -2.50E+00 2.90E-e00 1.lOE+0O SWL-3 L4438-03 46 Be-7 8. 1OE+O0 8.50E+00 2.80E+0O SWL-3 L4438-03 46 Ce-141 -1 .20E+O0 1 .70E+00 5.90E+00 SWL-3 L4438-03 46 Ce-144 -I1.26E+0l 5.40E+00 l.90E+0O SWL-3 L4438-03 46 Co-57 5.40E-01 6.70E-01 2.20E+00 SWL-3 L4438-03 46 Co-58 -7.20E-01 9.20E-01 3.20E+00 SWL-3 L4438-03 46 Co-60 -3.OOE-02 8.10OE-01 2.80E+00 SWL-3 L4438-03 46 Cr-SI -1 .50E-i01 1.10E+01 3.90E+01 SWL-3 L4438-03 46 Cs-134 1.66E+O0 8.50E-01 2.80E+00 SWL-3 L4438-03 46 Cs-137 8.70E-01 8.30E-01 2.80E+00 SWL-3 L4438-03 46 Fe-59 3.90E+00 2.OOE+00 6.50E+00 SWL-3 L4438-03 46 1-131 5.50E+00 5.50E+00 1.80E+01 SWL-3 L4438-03 46 K-40 -1 .90E+01 1.30E-i0I 4.70E+01 SWL-3 L4438-03 46 La-140 -2.90E+00 3.30E+00 1.20E+01 SWL-3 L4438-03 46 Mn-54 1.50E-01 8.30E-01 2.80E+00 SWL-3 L4438-03 46 Nb-95 1.70E+00 I1.20E+O0 3.80E+00 SWL-3 L4438-03 46 Ru-103 -1 .70E-i00 1.20E+00 4.10E+00 SWL-3 U4438-03 46 Ru-106 -1.12E+01 7.60E+00 2.70E+0O SWL-3 L4438-03 46 Sb-124 9.OOE-01 2.30E+00 8.10E+00 SWL-3 L4438-03 46 Sb-125 2.70E+00 2.OOE+00 6.60E+00 SWL-3 L4438-03 46 Se-75 1.90E+00 1.20E+00 3.80E+00 SWL-3 L4438-03 46 Zn-65 -2.10OE+00 2.60E+00 9.20E+00 SWL-3 L4438-03 46 Zr-95 1.70E+00 1.60E+00 5.40E+O0 SWL-1 L4590-01 51 AcTh-228 2.60E+00 3.10E+00 1.00E+01 SWL-1 U4590-01 51 Ag-108m O.OOE+00 6.40E-0O 2.20E+O0 SWL-1 L4590-01 51 Ag-I lOm -1.80E+00 1.IOE+00 3.90E+00 SWL-1 LA590-01 51 Ba-140 -1.40E+00 1.90E+00 6.90E+00 SWL-I U4590-01 51 Be-7 -3.90E+00 6.90E+00 2.40E+01 SWL-I UA590-01 51 Ce-141 1.30E+00 2.1OE+00 6.80E+-O SWL-I UA590-01 51 Ce-144 3.80E+00 4.70E+O0 1.60E+01 SWL-I L4590-01 51 Co-57 1.04E+00 6.10E-0O 2.OOE+00 SWL-1 L4590-01 51 Co-58 3.50E-01 8.50E-01 2.90E+00 SWL-1 L4590-01 51 Co-60 4.70E-01 9.10E-0O 3. 1OE+00 SWL-1 L4590-01 51 Cr-SI 6.50E+00 9.50E+00 3.20E+01 SWL-1 U4590-01 51 Cs-134 1.41E+00 8.60E-01 2.80E+00 SWL-1 U4590-01 51 Cs-137 -1.52E+00 8.10E-0O 2.90E+00 SWL-1 L4590-01 51 Fe-59 2.70E+00 2.10E+00 6.80E+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-248

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-1 LA590-01 51 1-131 -2.OOE+00 3.40E+00 1.20E+0O SWL-1 L4590-01 51 K-40 -3.00E+00 1.40E+01 4.70E+0O SWL-1 L4590-01 51 La-140 -1.60E+00 2.20E+00 8.OOE+00 SWL-1 L4590-01 51 Mn-54 -1.33E+00 7.90E-01 2.90E+00 SWL-I L4590-01 51 Nb-95 -8.00E-01 1.20E+00 4.30E+00 SWL-1 L4590-01 51 Ru-103 -1.28E+00 9.60E-01 3.40E+00 SWL-1 L4590-01 51 Ru-106 5.80E+00 7.70E+00 2.60E+0O SWL-I L4590-01 51 Sb-124 5.70E+00 2.10E+00 6.30E+00 SWL-I L4590-01 51 Sb-125 3.OOE-01 2.IOE+00 7.20E+00 SWL-1 L4590-01 51 Se-75 -7.OOE-0 I.IOE+00 3.60E+00 SWL-1 L4590-01 51 Zn-65 -1.40E+00 2.70E+00 9.40E+00 SWL-1 L4590-01 51 Zr-95 I.OOE+00 1.40E+00 4.80E+00 SWL-2 L4590-02 51 Ach-228 -1.30E+00 3.80E+00 1.30E+0O SWL-2 L4590-02 51 Ag-108m -5.20E-01 5.50E-01 I.90E+00 SWL-2 L4590-02 51 Ag-l lOm -6.OOE-02 9.60E-01 3.30E+00 SWL-2 L4590-02 51 Ba-140 -2.OOE-01 1.70E+00 6.10E+00 SWL-2 L4590-02 51 Be-7 -3.20E+00 6.40E+00 2.20E+01 SWL-2 L4590-02 51 Ce-141 -8.OOE-01 2.OOE+00 6.80E+00 SWL-2 UA590-02 51 Ce-144 -9.80E+00 3.80E+00 1.30E+01 SWL-2 U4590-02 51 Co-57 -5.60E-0O 5.OOE-0 1.70E+00 SWL-2 UA590-02 51 Co-58 4.10E-01 6.90E-01 2.30E+00 SWL-2 14590-02 51 Co-60 1.20E-01 7.80E-01 2.70E+00 SWL-2 4590-02 51 Cr-51 1.60E+00 8.30E+00 2.80E+0O SWL-2 U4590-02 51 Cs-134 -5.70E-01 6.80E-01 2.40E+00 SWL-2 L4590-02 51 Cs-137 6.OOE-02 7.10E-01 2.40E+00 SWL-2 L4590-02 51 Fe-59 1.30E+00 1.60E+00 5.30E+00 SWL-2 UA590-02 51 1-131 8.00E-01 2.90E+00 9.90E+00 SWL-2 L4590-02 51 K-40 3.OOE+00 1.20E+01 3.90E+01 SWL-2 14590-02 51 La-140 -2.0OE-01 2.00E+00 7.00E+00 SWL-2 14590-02 51 Mn-54 8.OOE-02 6.70E-01 2.30E+00 SWL-2 14590-02 51 Nb-95 3.80E-01 8.40E-01 2.90E+00 SWL-2 14590-02 51 Ru-103 -1.04E+00 8.30E-01 2.90E+00 SWL-2 LA590-02 51 Ru-106 -1.80E+00 6.60E+00 2.30E+01 SWL-2 LA590-02 51 Sb-124 3.OOE-01 1.80E+00 6.50E+00 SWL-2 LA590-02 51 Sb-125 3.OOE-01 1.80E+00 6.10E+00 SWL-2 UA590-02 51 Se-75 -1.43E+00 8.90E-01 3.101E+00 SWL-2 14590-02 51 Zn-65 -1.70E+00 1.90E+00 6.80E+00 SWL-2 14590-02 51 Zr-95 - 1.50E+00 1.30E+00 4.60E+00 SWL-3 L4590-03 51 AcTh-228 -3.40E+00 3.50E+00 1.20E+0O SWL-3 14590-03 51 Ag-108m -9.OOE-02 5.90E-01 2.OOE+00

Radioactivity detected in sample (i.e., concentration > 3 X standard deviation)

D-249

Indiana Michigan Power Co., DC Cook Nuclear Plant Radiological Environmental Monitoring Program Summary of 2002 Data Media Station LSN Week Nuclide Conc Std. Dev. MDC (pCi/kg) (pCi/kg) (pCi/kg)

SWL-3 L4590-03 51 Ag-i lOm -5.50E-01 9. 10E-01 3.30E+O0 SWL-3 L4590-03 51 Ba-140 L.OOE-01 1.80E+00 6.40E+O0 SWL-3 L4590-03 51 Be-7 -l . IE+00 6.40E+00 2.20E+01 SWL-3 L4590-03 51 Ce-141 -6.90E+00 2.IOE+00 7.30E+00 SWL-3 L4590.03 51 Ce- 144 -3.70E+00 3.90E+00 1.40E+01 SWL-3 L4590-03 51 Co-57 -8.20E-01 5.OOE-01 I1.70E+00 SWL-3 LA590-03 51 Co-58 I1.24E+00 7.OOE-01 2.30E+00 SWL-3 L4590-03 51 Co-60 -1.53E+00 7.80E-01 2.90E+00 SWL-3 L4590-03 51 Cr-51 4.40E+O0 8.70E+00 2.90E+01 SWL-3 LA590-03 51 Cs- 134 1.41E+O0 7.40E-01 2.40E+00 SWL-3 LA590-03 51 Cs-137 6.OOE-02 7.80E-01 2.70E+00 SWL-3 L4590-03 51 Fe-59 5.OOE-01 I1.60E+00 5.50E+00 SWL-3 L4590-03 51 1-131 2.20E-i0O 3. IOE+00 I.OOE+01 SWL-3 L4590-03 51 K-40 6.OOE+00 1.20E+01 4.I1OE+01 SWL-3 L4590-03 51 La-140 1LOOE-01 2.10OE+00 7.40E+00 SWL-3 L4590-03 51 Mn-54 4.90E-01 6.80E-01 2.30E+O00 SWL-3 L4590-03 51 Nb-95 -5.50E-01 9.OOE-01 3.20E+00 -

SWL-3 L4590-03 51 Ru-103 -1.31IE+00 8.60E-01 3.I1OE-i00 SWL-3 LA590-03 51 Ru-106 -3.1OE+00 7.I1OE+00 2.50E+01 SWL-3 1A590-03 51 Sb-124 -1.20E+00 2.20E-e00 7.90E+00 SWL-3 LA590-03 51 Sb-125 -6.20E+00 1.80E-+OO 6.60E+00 SWL-3 L4590-03 51 Se-75 -5.50E-01 8.OOE-01 2.80E+O0 SWL-3 L4590-03 51 Zn-65 -1.90E-u0O 1.60E+00 5.90E+00 SWL-3 L4590-03 51 Zr-95 L.OOE+00 1.40E+00 4.80E+00 SWL-1 LA590-04 51 H-3 I1.20E+02 4.30E+02 1.30E+03 SWL-2 L4590-05 51 H-3 -5.60E+02 4.20E+02 I1.30E+03 SWL-3 L4590-06 51 H-3 -5.60E+02 4.20E+02 1.30E..03

Radioactivity detected in sample (i.e., concentration >3 X standard deviation)

D-250

DC Cook Nuclear Plant Units 1&2 Annual Radiological Environmental Operating Report 2002 APPENDIX E Pre-Operational Radiological Monitoring Program E-1

DC Cook Nuclear Plant Units 1&2 Annual Radiological Environmental Operating Report 2002 D.C. Cook Nuclear Plant I Pre-Operational Radiological Monitoring Program Summary This appendix details information obtained during the conduct of a Pre-Operational Radiological Monitoring Program (PRMP) at the D.C. Cook Nuclear plant from August 1971 until the initial criticality of Unit 1 on January 18, 1975. Program related samples were analyzed by the Eberline Instrument Corporation and a summary of these results are _

presented below. This information was utilized during the evaluation of D.C. Cook's 2002 Radiological Environmental Monitoring Program sample data and allowed for the comparison of current and historical information. -

Air Samples:

Gross beta radioactivity in PRMP air particulate filters ranged from 0.01 to 0.17 pCilm3 from mid 1971 until mid 1973. In June of 1973 and 1974, the People's Republic of China detonated several nuclear devices in the atmosphere. As a result, PRMP gross beta radioactivity results up to 0.45 pCi/m3 were documented with no statistically significant difference noted between indicator and control stations. By the end of the pre-operational period, gross beta values were approximately 0.06 pCi/m3.

Analysis of composited PRMP air particulate filters detected "trace amounts" of fission product nuclides Ce-144, Ru-103, Ru-106, Zr-95 and Nb-95. The presence of these nuclides was attributed to previously conducted atmospheric nuclear tests.

Cosmogenically produced Be-7 was also identified during the analysis of these air particulate filters.

Direct Radiation:

Direct radiation (background) as measured by PRMP thermoluminescent dosimeters ranged between 1.0 and 2.0 mRem per week.

Milk Samples:

Gamma ray spectroscopy of PRMP milk samples was conducted and naturally occurring K-40 was detected in the range of 520 to 2310 pCi/liter. Cs-137 was detected in many milk samples following the atmospheric nuclear test discussed above. Cs-137 radioactivity ranged from 8 to 33 pCi/liter. 1-131 was noted in four milk samples collected on 719/74 with values ranging from 0.2 to 0.9 pCi/liter.

Lake Water Samples:

PRMP Lake water samples collected were analyzed for tritium and by gamma ray spectroscopy. Tritium activities were below 1000 pCi/liter and typically averaged about 400 pCi/liter. No nuclides were detected by gamma ray spectroscopy.

E-2

DC Cook Nuclear Plant Units 1&2 Annual Radiological Environmental Operating Report 2002 Lake Sediment Samples:

PRMP lake sediment samples were analyzed by gamma ray spectroscopy and a natural abundance of Uranium, Thorium daughters and K-40 were detected. Traces of Cs- 137 were also noted (less than 0.1 pCi/gram) and attributed to fallout.

Fish Samples:

PRMP Fish samples collected and analyzed by gamma ray spectroscopy exhibited a natural abundance of K-40. Trace levels of Cs-137 present were attributed to fallout.

Drinking Water Samples:

Drinking water sampling and analysis was not performed as part of D.C. Cook's PRMP.

E-3

ML031260606

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