ML15141A219

Annual Radiological Environmental Operating Report

ML15141A219
Person / Time
Site:	LaSalle
Issue date:	05/13/2015
From:	Exelon Generation Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML15141A347	List: ML15141A219 RA15-024, Annual Radiological Environmental Operating Report
References
RA1 5-024
Download: ML15141A219 (88)

Text

Table 3.2-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2014)

RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM LIQUID RELEASES AND COMPLIANCE STATUS 3rd Infant Quarterly 1st  % of 2nd  % of 3/4 of 4th 3/4 of Annual  % of Receptor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit IOCFR5O Appendix I compliance Total Body 1.50E+00 mRem 0.OOE+0Q 0.00 0.00E÷00 0.00 0.OOE+00 0.00 0.00E+00 0.00 3.OOE+00 0.00 Organ 5.OOE+00 mRem 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE÷00 0.00 O.OOE+O0 0.00 1.OOE+01 0.00 4OCFRI4I compliance (nearest public drinking water)

Total Body mRem 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 4.OOE+00 0.00 Organ mRem 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 4.OOE+00 0.00 3td Quarterly . 1st  % of 2nd  % of  % of 4th  % of Annual  % of Child Units Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Receptor IOCFR5O Appendix I compliance Total Body 1.50E÷00 mRem 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE+00 0.00 3.OOE+00 0.00 Organ 5.OOE+00 mRem 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE÷00 0.00 0.OOE÷00 0.00 1.OOE+0J 0.00 4OCFRI 41 compliance (nearest public drInking water)

Total Body mRem 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 4.OOE+00 0.00 Organ mRem 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 4.OOE+00 0.00 3rU Teenager Quarterly 1st  % of 2nd  % of  % of 4th  % of Annual  % of Units Limit Quarter Limit Quarter Limit Limit Limit Receptor Limit Quarter Limit Quarter IOCFR5O Appendix I compliance Total Body 1.50E+00 mRem 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE+00 0.00 3.OOE+00 0.00 Organ 5.OOE+00 mRem 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE+00 0.00 1.OOE+01 0.00 4OCFRI 41 compliance (nearest public drinking water)

Total Body mRem 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 4.OOE+00 0.00 Organ mRem 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 4.OOE+00 0.00 3td Quarterly 1st  % of 2nd  % of 3/4 of 4th 3/4 of Annual  % of Adult Units Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Receptor IOCFR5O Appendix I compliance Total Body 1.50E÷00 mRem 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE+00 0.00 3.OOE+00 0.00 Organ 5.OOE+00 mRem 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE+00 0.00 0.OOE+00 0.00 1.OOE+01 0.00 4OCFRI4I compliance (nearest public drinking water)

Total Body mRem 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 4.OOE+00 0.00 Organ mRem 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 4.OOE+00 0.00

Table 3.3-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2014)

MAXIMUM DOSES RESULTiNG FROM RELEASES AND COMPLIANCE STATUS IOCFR2O I 4OCFRI9O Compliance 3rd 4th I  %

Quarter Quarter Quarter Quarter Annual Annual Annual Dose Dose Dose Dose Dose Limit Limit (mRem) (mRem) (mRem) (mRem) (mRem) (mRemlyr)

Unit I 4OCFRI 90 Compliance Ui DEX 8.25E-02 1.04E-01 tO6E-O1 I 9.71E-02 3.90E-01 25 I 1.56 I IOCFR2O Compliance UI DT0t 3.96E-0II 3.47E-O1 L8E-0i I 2.92E-0I I.30E+00 100 1.30 4OCFR19O Compliance Bone 7.67E-03 7.46E-03 7.28E-03 7.38E-03 98E-02 25 0.12 Liver 2.46E-03 2.22E-03 1 .99E-03 2.1 6E-03 8.83E-03 25 0.04 Thyroid 3.13E-Oi 2.43E-0i 1.61E-01 1 .95E-0i 9.12E-01 75 1.22 Kidney 2.62E-03 2.35E-03 2.07E-03 2.25E-03 9.29E-03 25 0.04 Lung 1 .48E-03 1 .48E-03 I .49E-03 1.54E-03 6.OOE-03 25 0.02 Gl-LLI 1 .53E-03 1.51 E-03 1 .52E-03 I .58E-03 6.1 3E-03 25 0.02 Unit 2 4OCFRI 90 Compliance U2DEX 9.71E-02 I 8.60E-02 8.43E-02 9.90E-02 3.66E-01 25 I 1.47 10CFR2O Compliance U2 DT0t 9.71E-02 I 8.60E-02 8.43E-02 9.90E-02 3.66E-01 100 0.37 40CFR190 Compliance Bone 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 25 0.00 Liver 0.OOE÷00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 25 0.00 Thyroid 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 75 0.00 Kidney 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 25 0.00 Lung 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 25 0.00 Gl-LLI 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE÷00 0.OOE+00 25 0.00 E-1.7 Page 92 of 178

Table 3.4-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2014)

RADIOLOGICAL IMPACT ON MAN MAXIMUM GAMMA AIR DOSE Doses Resulting from Airborne Releases The lollowwg are the maximum annual calculated cumutative offsite doses resulting from La Salle County Station airborne releases.

LaSalte County Generating Statiom Sector Maximvm VaIu Affected gamma air (1) 5.350 x I 0 rnrad East-Southeast beta air2 I .930 x i0 mrad East-Southeast wtole bodyC 2.220 x I mrem East-Southeast skin 5.570 x I Q4 mrern East-Southeast organ (Infant-thyroid) 4.170 x 10° mrem East-Southeast Compliance Status 10 CFR 60 AppendIx I Yearly Objective  % of Appendix I gamma air 10.0 mrad 0.05 beta air 20.0 mrad 0,01 whole body 5.0 mrem 0.44 skin 15,0 mtem 0.04 organ 15.0 mram 27.8

) Gamma Air Dose GASPAR H, NUREG-0597 1)

Beta Air 0050- GASPAR H, NURES-0597

\Miolo Body Oos GASPAR II, NUREG-0597 Skin Ooso GASPAR H, NUREG-0597 (ui trdi&ation and Food Pathwye Dose- GASPAR II, NUREG-4J597 E-1.8 Page93 of 178

APPENDIX F METEOROLOGICAL DATA Page 94 of 178

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class Extremely Unstable - 200Ft33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 8 3 0 0 11 NNE 0 2 5 1 0 0 8 NE 0 0 5 1 0 0 6 ENE 0 0 0 2 0 0 2 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 2 0 8 0 10 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 6 0 1 7 WNW 0 0 0 1 3 0 4 NW 0 0 0 0 1 0 1 NNW 0 0 1 2 0 0 3 Variable 0 0 0 0 0 0 0 Total 0 2 21 16 12 1 52 Hours of calm in this stability class: 0 Hours of missing wind measuremen ts in this stability class: 0 Hours of missing stability measuremen ts in all stability classes: 3 F-I Page 95 of 178

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class Moderately Unstable 200Ft33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 4 2 0 0 6 NNE 0 0 2 1 0 0 3 NE 0 0 1 2 0 0 3 ENE 0 0 1 0 0 0 1 E 0 0 0 0 0 0 0 ESE 0 0 0 2 0 0 2 SE 0 0 1 2 1 0 4 SSE 0 0 0 1 0 0 1 S 0 0 6 3 0 0 9 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 1 0 0 2 3 w 0 0 0 1 1 1 3 WNW 0 0 0 0 1 0 1 NW 0 0 0 0 0 0 0 NNW 0 2 4 2 0 0 8 Variable 0 0 0 0 0 0 0 Total 0 2 20 16 3 3 44 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-2 Page 96 of 178

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class - Slightly Unstable 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 3 5 0 0 8 NNE 0 o io 7 0 0 17 NE 0 0 3 2 3 0 8 ENE 0 1 6 1 0 0 8 E 0 1 0 0 0 0 1 ESE 0 1 4 1 0 0 6 SE 0 0 5 0 2 0 7 SSE 0 0 2 5 0 0 7 S 0 3 1 1 1 1 7 SSW 0 1 6 0 0 0 7 SW 0 0 1 1 0 2 4 WSW 0 0 1 2 0 4 7 W 0 o 1 3 0 0 4 NNW 0 1 3 0 1 1 6 NW 0 0 2 0 1 0 3 NNW 0 0 4 2 0 0 6 Variable 0 0 0 0 0 0 0 Total 0 8 52 30 8 8 106 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all stability classes: 3 F-3 Page 97 of 178

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class Neutral - 200Ft-33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 8 26 18 9 0 61 NNE 0 7 7 0 0 0 14 NE 0 4 9 15 11 0 39 ENE 0 2 3 39 3 0 47 E 0 2 5 7 0 0 14 ESE 0 4 6 7 5 3 25 SE 1 3 13 13 3 0 33 SSE 1 5 18 4 4 1 33 S 0 4 18 15 17 0 54 SSW 1 4 13 10 7 0 35 SW 0 5 13 14 16 2 50 WSW 0 6 15 9 8 9 47 W 1 8 31 28 6 7 81 WNW 0 17 47 47 19 3 133 NW 0 7 52 25 10 1 95 NNW 0 8 20 59 5 5 97 Variable 0 0 0 0 0 0 0 Total 4 94 296 310 123 31 858 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-4 Page 98 of 178

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class - Slightly Stable - 200Ft-33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind 13 47 812 1318 1924 > 24 Total Direction 1 16 4 3 0 0 24 N

0 8 3 0 0 0 11 NNE 0 2 0 2 0 0 4 NE 0 1 17 1 0 0 19 ENE 0 0 18 3 0 0 21 E

1 3 4 2 1 0 11 ESE 3 8 7 0 0 0 18 SE 1 3 7 9 6 3 29 SSE 1 9 11 13 17 5 56 5

2 10 13 5 13 3 46 55W 1 7 10 7 11 8 44 SW 1 6 23 19 1 0 50 WSW 1 7 44 13 13 3 81 W

0 13 40 61 43 21 178 WNW 0 9 19 9 0 1 38 NW 1 10 16 7 0 0 34 NNW 0 0 0 0 0 0 0 Variable 13 112 236 154 105 44 664 Total Hours of calm in this stability class: 0 rement s in this stabilit y class: 0 Hours of missing wind measu y measu rement s in all stabilit y classes  : 3 Hours of missing stabilit F-5 Page 99 of 178

LaSalle County Generating Station Period of Record: January March 2014 Stability Class - Moderately Stable 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 2 3 0 0 0 0 5 NNE 0 1 0 0 0 0 1 NE 1 1 0 0 0 0 2 ENE 0 0 0 0 0 0 0 E 1 4 3 1 0 0 9 ESE 0 13 5 0 0 0 18 SE 0 4 6 0 0 0 10 SSE 3 8 7 0 1 0 19 5 1 8 8 12 0 0 29 SSW 0 6 12 19 3 0 40 SW 2 5 7 13 10 0 37 WSW 1 4 20 13 3 0 41 W 1 6 11 8 5 0 31 WNW 3 8 28 2 6 0 47 NW 1 3 8 0 0 0 12 NNW 0 1 1 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 16 75 116 68 28 0 303 Hours of calm in this stability class: 0 Hours of missing wind measuremen ts in this stability class: 0 Hours of missing stabilit y measuremen ts in all stabilit y classes: 3 F-6 Page lOOof 178

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 1 0 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 2 0 0 0 0 2 ESE 0 2 1 1 0 0 4 SE 0 7 2 0 0 0 9 SSE 0 10 14 2 0 0 26 5 0 6 9 0 0 0 15 SSW 0 2 10 1 0 0 13 SW 0 5 4 1 0 0 10 WSW 1 4 9 5 0 0 19 W 0 6 4 0 0 0 10 WNW 1 4 5 0 0 0 10 NW 2 5 2 0 0 0 9 NNW 1 1 0 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 5 55 60 10 0 0 130 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-7 Page 101 of 178

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class - Extremely Unstable - 375Ft-33Ft DeltaT (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-8 Page 102 of 17$

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class Moderately Unstable 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 3 0 3 NE 0 0 0 0 1 0 1 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 4 0 4 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measuremen ts in all stability classes: 3 F-9 Page 103 of 178

IaSal1e County Generating Station Period of Record: January - March 2014 Stability Class Slightly Unstable 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 1 1 0 2 NE 0 0 0 1 1 1 3 ENE 0 0 0 0 2 0 2 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 1 0 0 1 SSE 0 0 0 0 0 0 0 5 0 0 2 3 0 1 6 SSW 0 0 1 2 0 0 3 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 1 0 1 WNW 0 0 0 0 1 0 1 NW 0 0 0 0 0 2 2 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 3 8 6 4 21 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-b Page lO4of 178

laSalle County Generating Station Period of Record: January - March 2014 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 1 5 9 34 35 18 102 NNE 0 4 12 12 13 4 45 NE 0 3 5 15 19 22 64 ENE 0 3 8 26 21 2 60 E 0 1 1 7 6 0 15 ESE 0 3 4 11 4 4 26 SE 1 1 5 5 10 9 31 SSE 0 0 13 12 11 6 42 S 0 1 17 23 11 29 81 55W 0 1 8 16 7 19 51 SW 1 3 8 17 6 28 63 WSW 0 4 6 11 11 20 52 w 1 2 6 41 21 22 93 WNW 0 6 12 39 40 33 130 NW 0 10 31 70 26 28 165 1 5 16 26 38 8 94 Variable 0 0 0 0 0 0 0 Total 5 52 161 365 279 252 1114 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-il PagelOSofl78

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class - Slightly Stable - 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 4 3 5 8 0 20 NNE 0 6 5 2 2 0 15 NE 0 1 9 4 0 0 14 ENE 1 3 8 7 1 0 20 E 0 2 7 4 2 1 16 ESE 0 2 4 3 6 5 20 SE 0 2 5 5 4 4 20 SSE 2 2 4 0 11 7 26 S 1 3 8 5 12 54 83 SSW 2 3 3 10 7 31 56 SW 1 2 9 10 9 30 61 WSW 0 3 6 14 9 20 52 W 0 0 12 28 12 30 82 WNW 0 0 7 22 48 85 162 NW 0 2 9 23 18 15 67 NNW 0 3 10 7 4 0 24 Variable 0 0 0 0 0 0 0 Total 7 38 109 149 153 282 738 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-12 PagelO6ofl78

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class - Moderately Stable 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 1 2 3 2 1 0 9 NNE 2 0 3 1 1 0 7 NE 0 1 1 1 0 0 3 ENE 1 2 0 0 0 0 3 E 1 1 1 3 1 0 7 ESE 0 1 1 1 2 1 6 SE 0 1 2 4 2 0 9 SSE 1 2 0 1 2 1 7 S 0 3 2 12 3 8 28 SSW 0 2 2 1 2 19 26 SW 2 1 0 7 3 11 24 WSW 1 0 1 2 7 10 21 w 0 1 0 4 14 5 24 WNW 2 0 1 4 2 2 11 NW 1 1 1 3 14 0 20 NNW 0 1 3 3 6 0 13 Variable 0 0 0 0 0 0 0 Total 12 19 21 49 60 57 218 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-13 PageJO7ofI78

LaSalle County Generating Station Period of Record: January - March 2014 Stability Class - Extremely Stable - 375Ft33Ft DeltaT (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 1 1 2 2 0 6 NNE 0 0 0 2 0 0 2 NE 0 0 1 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 1 0 0 0 0 1 ESE 0 1 0 0 0 0 1 SE 0 1 3 0 0 0 4 SSE 0 0 3 7 1 0 11 S 0 1 1 9 3 2 16 SSW 0 0 2 3 3 0 8 Sw 0 0 0 4 2 0 6 WSW 0 0 0 0 0 0 0 w 0 0 0 1 0 0 1 WNW 0 0 0 0 0 0 0 NW 0 0 0 1 0 0 1 NNW 0 0 2 2 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 5 13 31 11 2 62 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-14 PagelO8ofl78

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 1 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 1 3 0 0 4 ENE 0 0 0 8 5 0 13 E 0 0 0 4 1 0 5 ESE 0 0 2 0 0 0 2 SE 0 0 1 0 0 0 1 SSE 0 0 0 0 0 0 0 S 0 0 0 1 0 0 1 SSW 0 0 0 0 5 0 5 SW 0 0 0 1 0 0 1 WSW 0 0 0 3 3 1 7 W 0 0 1 0 3 0 4 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 5 21 17 1 44 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-15 PagelO9ofl7$

LaSalle County Generating Station Period of Record: April June 2014 Stability Class Moderately Unstable 200Ft-33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 1 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 1 0 0 1 ENE 0 0 0 2 0 0 2 E 0 1 0 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 1 2 0 0 0 3 SSE 0 0 0 2 2 4 8 S 0 0 1 5 0 1 7 SSW 0 0 2 2 1 0 5 SW 0 0 2 0 0 0 2 WSW 0 0 5 4 2 0 11 W 0 0 0 2 2 1 5 WNW 0 0 2 2 0 0 4 NW 0 0 0 0 0 0 0 NNW 0 0 0 7 0 0 7 Variable 0 0 0 0 0 0 0 Total 0 2 14 28 7 6 57 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-16 PagellOofl7S

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class Slightly Unstable 200Ft33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed fin mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 1 5 0 0 0 6 NNE 0 0 2 0 0 0 2 NE 0 0 3 2 0 0 5 ENE 0 0 2 5 2 0 9 E 0 2 0 0 4 1 7 ESE 0 0 1 0 0 1 2 SE 0 2 2 1 0 1 6 SSE 0 1 2 1 4 2 10 S 0 2 4 4 1 1 12 SSW 0 0 13 5 1 0 19 SW 0 1 13 3 1 0 18 WSW 0 0 9 10 2 0 21 w 0 0 10 8 0 4 22 0 1 14 8 2 0 25 NW 0 0 2 5 0 0 7 NNW 0 1 7 12 0 0 20 Variable 0 0 0 0 0 0 0 Total 0 11 89 64 17 10 191 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-17 Page 111 of 178

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class Neutral - 200Ft-33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 1 10 21 3 0 0 35 NNE 0 17 24 2 0 0 43 NE 0 17 27 23 0 0 67 ENE 1 26 31 33 12 0 103 E 0 17 28 8 20 6 79 ESE 0 5 8 3 5 1 22 SE 0 9 14 7 5 1 36 SSE 1 6 23 24 3 5 62 S 1 13 26 10 8 1 59 SSW 0 2 35 13 8 0 58 SW 1 15 20 21 5 2 64 WSW 1 12 27 26 4 0 70 W 1 10 17 17 5 3 53 WNW 0 16 31 17 2 0 66 NW 1 4 27 4 0 0 36 NNW 1 14 36 22 2 0 75 Variable 1 0 0 0 0 0 1 Total 10 193 395 233 79 19 929 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 1 F-is PageJl2ofl78

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class - Slightly Stable 200Ft33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 2 7 9 0 0 0 18 NNE 0 11 3 0 0 0 14 NE 1 8 25 8 0 0 42 ENE 0 4 23 25 0 0 52 E 0 13 33 26 7 1 80 ESE 0 7 3 5 0 0 15 SE 0 9 17 2 0 0 28 SSE 1 8 12 13 2 1 37 S 1 7 32 33 4 0 77 SSW 2 8 36 12 4 0 62 SW 2 3 17 7 3 0 32 wsw 2 9 16 6 0 0 33 W 1 9 14 4 5 3 36 WNW 1 8 10 1 3 3 26 NW 0 6 15 2 0 0 23 NNW 1 5 12 3 0 0 21 Variable 0 0 0 0 0 0 0 Total 14 122 277 147 28 8 596 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-19 Pagell3ofl78

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class Moderately Stable 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed fin mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 1 1 0 0 0 2 NNE 0 2 0 0 0 0 2 NE 0 2 0 0 0 0 2 ENE 2 0 2 0 0 0 4 E 1 20 15 2 0 0 38 ESE 0 9 1 1 0 0 11 SE 1 8 15 4 0 0 28 SSE 0 7 11 1 0 0 19 S 2 9 5 3 0 0 19 SSW 0 8 11 6 1 0 26 SW 2 6 3 0 0 0 11 WSW 1 5 7 7 0 0 20 W 3 8 7 0 0 0 18 WNW 0 16 6 0 0 0 22 NW 1 7 3 0 0 0 11 NNW 0 3 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 13 111 87 24 1 0 236 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-20 Page ll4of 178

LaSalle County Generating Station Period of Record: April June 2014 Stability Class - Extremely Stable - 200Ft33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 1 0 0 0 0 1 E 0 4 0 0 0 0 4 ESE 0 8 1 0 0 0 9 SE 0 13 12 1 0 0 26 SSE 0 12 6 1 0 0 19 S 0 9 6 0 0 0 15 SSW 0 9 28 0 0 0 37 SW 0 1 1 0 0 0 2 WSW 1 3 0 0 0 0 4 w 0 4 1 0 0 0 5 WNW 0 5 0 0 0 0 5 NW 0 1 1 0 0 0 2 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 1 70 56 2 0 0 129 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 f-21 Page 115 of 17$

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class Extremely Unstable - 375Ft-33Ft DeltaT (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 1 1 2 E 0 0 0 0 0 2 2 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 1 1 W 0 0 0 0 0 2 2 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 1 6 7 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-22 Pagell6ofl78

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class - Moderately Unstable - 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed f in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 3 0 3 ENE 0 0 0 2 0 3 5 E 0 1 0 0 0 1 2 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 SSW 0 0 0 0 1 1 2 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 1 0 1 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 1 0 2 5 5 13 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-23 Pagell7ofl78

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class Slightly Unstable - 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 3 2 0 5 E 0 0 0 0 2 1 3 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 3 3 S 0 0 0 2 0 1 3 SSW 0 0 0 1 0 3 4 SW 0 0 0 0 1 0 1 WSW 0 0 0 1 3 2 6 w 0 0 0 1 0 6 7 WNW 0 0 0 2 0 0 2 NW 0 0 0 0 0 0 0 NNW 0 0 0 1 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 0 11 8 16 35 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-24 Page 118 of 178

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class Neutral 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 6 19 12 12 0 49 NNE 0 8 14 22 4 2 50 NE 1 9 12 29 18 3 72 ENE 0 13 25 39 51 19 147 E 0 9 25 19 12 21 86 ESE 1 3 8 9 4 14 39 SE 0 7 9 15 1 4 36 SSE 0 0 13 22 10 17 62 5 0 4 21 32 14 18 89 SSW 0 4 12 34 17 23 90 SW 1 9 16 33 21 8 88 WSW 0 6 12 40 24 10 92 W 1 4 15 33 24 14 91 WNW 0 5 26 19 18 9 77 NW 0 6 23 21 14 1 65 NNW 0 3 13 36 27 4 83 Variable 0 1 0 0 0 0 1 Total 4 97 263 415 271 167 1217 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-25 Pagell9ofl7$

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class Slightly Stable - 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 1 7 6 4 1 19 NNE 0 5 4 2 1 0 12 NE 0 2 11 11 7 0 31 ENE 0 1 16 15 18 1 51 E 0 1 18 18 15 21 73 ESE 0 0 5 13 7 6 31 SE 0 2 4 16 5 3 30 SSE 0 4 4 8 16 13 45 S 0 2 3 11 26 35 77 SSW 0 2 5 14 25 23 69 SW 0 1 3 16 18 9 47 WSW 0 7 4 12 19 1 43 W 0 4 6 6 11 8 35 WNW 1 1 7 18 11 3 41 NW 0 4 6 19 8 0 37 NNW 2 1 3 11 11 2 30 Variable 0 0 0 0 0 0 0 Total 3 38 106 196 202 126 671 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-26 Pagel2Oofl78

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class - Moderately Stable 375Ft33Ft DeltaT (F)

Winds Measured at 375 Feet Wind Speed f in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 2 1 2 0 5 NNE 0 2 0 0 0 0 2 NE 0 1 0 1 0 0 2 ENE 0 1 0 0 0 0 1 E 0 1 0 1 4 0 6 ESE 0 0 3 16 2 2 23 SE 0 0 3 10 2 5 20 SSE 0 0 8 4 4 16 32 S 0 2 5 16 11 5 39 SSW 0 0 2 2 6 13 23 SW 0 0 2 5 6 1 14 WSW 0 0 3 0 0 0 3 W 0 1 1 0 1 0 3 WNW 0 0 5 6 1 0 12 NW 0 0 2 10 3 0 15 NNW 2 0 0 4 3 0 9 Variable 0 0 0 0 0 0 0 Total 2 8 36 76 45 42 209 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 f-27 Page 121 of 178

LaSalle County Generating Station Period of Record: April - June 2014 Stability Class - Extremely Stable - 375Ft33Ft DeltaT (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 2 1 0 0 3 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 1 3 0 0 4 SSE 0 0 1 1 1 1 4 5 0 0 4 1 0 1 6 SSW 0 1 0 0 2 3 6 SW 0 1 0 1 1 1 4 WSW 0 0 4 0 0 0 4 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 2 12 7 4 6 31 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 F-28 Pagel22ofl78

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class - Extremely Unstable 200Ft33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 1 1 0 0 2 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 1 0 0 0 0 1 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 55W 0 0 1 1 0 0 2 SW 0 1 0 1 0 0 2 WSW 0 0 0 0 0 0 0 W 0 1 2 3 0 0 6 WNW 0 0 4 4 0 0 8 NW 0 0 0 1 0 0 1 NNW 0 0 0 1 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 3 8 12 0 0 23 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-29 Pagel23ofl78

LaSalle County Generating Station Period of Record: July September 2014 Stability Class - Moderately Unstable 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 1 1 0 0 2 NNE 0 0 1 0 0 0 1 NE 0 0 1 0 0 0 1 ENE 0 0 2 1 0 0 3 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 1 0 0 0 1 SSE 0 0 0 0 0 0 0 S 0 0 1 1 0 0 2 SSW 0 2 2 1 0 0 5 SW 0 1 4 2 0 0 7 WSW 0 0 6 6 0 0 12 W 0 3 10 4 0 0 17 WNW 0 3 6 11 0 0 20 NW 0 0 0 2 0 0 2 NNW 0 0 0 1 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 9 35 30 0 0 74 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-30 Page 124of 17$

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class Slightly Unstable 200Ft33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

WI nd Direction 13 47 812 1318 1924 > 24 Total N 0 0 3 1 0 0 4 NNE 0 1 4 0 0 0 5 NE 0 0 7 0 0 0 7 ENE 0 0 3 0 0 0 3 E 0 0 3 2 0 0 5 ESE 0 0 2 2 0 0 4 SE 0 0 3 0 0 0 3 SSE 0 1 4 3 0 0 8 S 0 6 8 1 0 0 15 SSW 0 12 16 1 0 0 29 SW 0 6 7 3 0 0 16 WSW 0 3 3 8 0 0 14 W 0 12 9 3 0 0 24 WNW 0 4 15 6 0 0 25 NW 0 1 12 3 0 0 16 NNW 0 0 2 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 46 101 33 0 0 180 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 5 Hours of missing stability measurements in all stability classes: 0 F-31 Page 125 of 178

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class Neutral - 200Ft33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 2 48 36 1 0 0 87 NNE 4 20 13 1 0 0 38 NE 7 16 19 5 0 0 47 ENE 0 16 38 1 0 0 55 E 3 17 18 3 0 0 41 ESE 2 11 9 3 0 0 25 SE 1 13 6 1 0 0 21 SSE 2 16 16 5 0 0 39 S 3 19 16 6 0 0 44 SSW 0 24 17 2 0 0 43 SW 4 24 20 10 2 0 60 WSW 4 18 8 10 0 0 40 w 3 22 16 8 1 0 50 WNW 0 11 39 13 5 0 68 NW 5 15 7 12 2 0 41 NNW 2 19 33 18 2 0 74 Variable 1 0 0 0 0 0 1 Total 43 309 311 99 12 0 774 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 7 Hours of missing stability measurements in all stability classes: 0 F-32 Pagel26ofl78

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class - Slightly Stable - 200Ft33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 2 17 4 0 0 0 23 NNE 4 14 5 0 0 0 23 NE 3 8 14 0 0 0 25 ENE 1 2 21 1 0 0 25 E 1 17 19 0 0 0 37 ESE 3 5 4 0 0 0 12 SE 4 10 4 1 0 0 19 SSE 6 14 17 0 0 0 37 S 1 20 27 3 0 0 51 SSW 3 11 25 0 0 0 39 SW 2 9 18 7 1 0 37 WSW 2 15 19 4 1 0 41 W 2 13 12 2 0 0 29 WNW 4 15 20 3 0 0 42 NW 2 5 6 0 0 0 13 NNW 1 12 3 0 0 0 16 Variable 0 0 0 0 0 0 0 Total 41 187 218 21 2 0 469 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 0 f-33 Pagel27ofl78

LaSalle County Generating Station Period of Record: July September 2014 Stability Class - Moderately Stable - 200Ft33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 10 0 0 0 0 10 NNE 1 3 0 0 0 0 4 NE 0 2 0 0 0 0 2 ENE 4 8 3 0 0 0 15 E 1 26 17 0 0 0 44 ESE 1 14 1 0 0 0 16 SE 1 19 1 0 0 0 21 SSE 3 18 2 0 0 0 23 5 1 27 9 0 0 0 37 55W 3 16 5 0 0 0 24 SW 3 14 10 0 0 0 27 WSW 2 14 9 0 0 0 25 W 9 12 8 0 0 0 29 WNW 5 24 4 0 0 0 33 NW 1 3 0 0 0 0 4 NNW 2 5 0 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 37 215 69 0 0 0 321 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 0 F-34 Pagel28ofl78

LaSalle County Generating Station Period of Record: July September 2014 Stability Class Extremely Stable - 200Ft-33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 1 1 0 0 0 0 2 E 2 15 4 0 0 0 21 ESE 2 35 0 0 0 0 37 SE 8 29 0 0 0 0 37 SSE 2 41 0 0 0 0 43 S 2 54 1 0 0 0 57 SSW 4 26 3 0 0 0 33 SW 2 30 0 0 0 0 32 WSW 4 22 3 0 0 0 29 w 1 29 1 0 0 0 31 WNW 2 11 0 0 0 0 13 NW 0 2 0 0 0 0 2 NNW 1 0 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 31 295 12 0 0 0 338 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 9 Hours of missing stability measurements in all stability classes: 0 F-35 Page 129of 178

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class - Extremely Unstable - 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-36 Page l3Oof 178

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 2 0 2 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 1 0 0 1 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 1 2 0 3 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 f37 Pagel3lofl78

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class - Slightly Unstable - 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 2 2 0 4 NNE 0 0 0 1 0 0 1 NE 0 0 1 1 0 0 2 ENE 0 0 0 3 0 0 3 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 1 0 0 1 SSE 0 0 0 0 0 0 0 S 0 0 1 0 1 0 2 SSW 0 1 3 1 1 0 6 SW 0 0 1 1 0 0 2 WSW 0 0 0 0 0 0 0 W 0 0 4 7 1 0 12 WNW 0 0 4 10 2 0 16 NW 0 0 0 1 4 0 5 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 1 14 28 11 0 54 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-38 Pagel32ofl78

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class - Neutral 375Ft33Ft DeltaT (F)

Winds Measured at 375 Feet Wind Speed fin mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 1 28 28 33 6 0 96 NNE 1 19 14 13 3 0 50 NE 4 12 20 33 6 0 75 ENE 0 12 31 22 0 0 65 E 2 13 18 15 0 0 48 ESE 1 7 12 8 0 0 28 SE 5 11 5 7 0 1 29 SSE 0 11 21 5 1 0 38 S 0 16 21 10 11 4 62 ssw 1 15 24 27 6 2 75 Sw 1 14 23 20 17 3 78 WSW 2 13 19 21 9 0 64 w 2 18 21 13 7 3 64 WNW 1 10 37 28 15 7 98 NW 1 12 18 28 27 9 95 NNW 2 11 12 18 17 3 63 Variable 0 1 0 0 0 0 1 Total 24 223 324 301 125 32 1029 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-39 Page 133 of 17$

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class - Slightly Stable - 375Ft-33Ft DeltaT (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 3 5 5 11 1 0 25 NNE 3 2 6 10 3 0 24 NE 1 6 9 12 1 0 29 ENE 1 3 7 19 6 0 36 E 0 5 4 14 16 0 39 ESE 1 0 6 5 5 0 17 SE 1 4 11 9 2 0 27 SSE 0 5 5 14 5 1 30 5 0 3 11 16 19 4 53 SSW 5 2 14 20 22 7 70 SW 0 5 15 11 22 6 59 WSW 1 9 7 14 17 3 51 W 4 4 12 7 5 4 36 WNW 1 8 9 11 8 3 40 NW 1 3 12 14 13 0 43 NNW 1 6 7 7 1 0 22 Variable 0 0 0 0 0 0 0 Total 23 70 140 194 146 28 601 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-40 Page 134of 178

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class - Moderately Stable 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 1 2 4 0 0 7 NNE 1 1 3 3 0 0 8 NE 1 0 0 1 0 0 2 ENE 0 1 1 0 0 0 2 E 0 0 1 9 14 3 27 ESE 0 1 11 10 6 0 28 SE 1 3 16 15 0 0 35 SSE 1 6 15 16 5 0 43 S 0 11 26 17 10 3 67 SSW 6 7 15 13 5 6 52 SW 0 8 8 7 14 1 38 WSW 1 5 15 3 1 0 25 W 1 4 11 4 3 0 23 WNW 0 9 8 12 2 0 31 NW 0 0 5 16 4 0 25 NNW 0 2 3 1 3 0 9 Variable 0 0 0 0 0 0 0 Total 12 59 140 131 67 13 422 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-41 Pagel35ofl78

LaSalle County Generating Station Period of Record: July - September 2014 Stability Class - Extremely Stable 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 3 0 0 3 SE 0 0 3 14 2 0 19 SSE 0 0 7 12 0 0 19 S 1 1 3 6 2 0 13 55W 0 2 4 6 0 0 12 Sw 1 5 3 0 0 0 9 WSW 0 3 7 0 0 0 10 W 1 1 3 0 0 0 5 WNW 0 0 1 0 0 0 1 NW 0 2 1 0 0 0 3 NNW 0 0 3 2 0 0 5 Variable 0 0 0 0 0 0 0 Total 3 14 35 43 4 0 99 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 f-42 Page 136of 17$

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Extremely Unstable - 200Ft33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 1 0 0 1 SW 0 0 0 1 0 0 1 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 2 0 0 2 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 F-43 Pagel37ofl78

LaSalle County Generating Station Period of Record: October December 2014 Stability Class Moderately Unstable 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSw 0 0 0 4 0 0 4 SW 0 0 0 5 0 0 5 WSW 0 0 0 0 0 0 0 W 0 0 0 1 1 0 2 WNW 0 0 3 0 0 0 3 NW 0 0 1 0 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 4 10 1 0 15 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 F-44 Pagel38oft78

LaSalle County Generating Station Period of Record: October December 2014 Stability Class Slightly Unstable 200Ft33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 2 0 0 2 SE 0 0 0 1 0 0 1 SSE 0 0 0 0 0 1 1 S 0 0 2 1 1 1 5 SSW 0 0 2 4 2 0 8 SW 0 0 1 5 0 0 6 WSW 0 0 0 4 0 0 4 w 0 4 0 8 1 0 13 WNW 0 0 1 5 1 0 7 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 5 6 30 5 2 48 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 f-45 Pagel39ofl7s

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Neutral - 200Ft33Ft DeltaT (F)

Winds Measured at 33 Feet Wind Speed fin mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 18 32 18 3 2 73 NNE 2 12 15 0 0 0 29 NE 0 5 4 0 0 0 9 ENE 0 5 5 0 0 0 10 E 0 8 10 0 0 0 18 ESE 0 7 17 18 0 0 42 SE 1 7 10 22 2 0 42 SSE 0 9 19 17 1 0 46 S 0 12 29 13 2 1 57 SSW 1 10 22 16 2 0 51 SW 2 12 31 14 4 0 63 WSW 1 10 25 13 0 3 52 W 2 12 27 48 24 5 118 WNW 2 13 59 94 16 0 184 NW 1 6 26 21 0 0 54 NNW 1 15 68 29 13 8 134 Variable 0 0 0 0 0 0 0 Total 13 161 399 323 67 19 982 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 f-46 Page l4Oof 178

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Slightly Stable 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 1 19 3 1 0 0 24 NNE 0 21 4 0 0 0 25 NE 0 3 14 0 0 0 17 ENE 0 1 6 0 0 0 7 E 0 4 7 0 0 0 11 ESE 2 9 21 0 0 0 32 SE 1 12 19 3 0 0 35 SSE 5 21 18 12 0 0 56 5 2 9 34 34 2 0 81 55W 3 10 30 47 2 0 92 Sw 0 15 27 18 3 0 63 WSW 3 3 32 18 1 0 57 W 1 15 27 33 17 3 96 WNW 3 11 35 21 26 8 104 NW 1 10 16 0 0 0 27 NNW 0 20 7 4 0 0 31 Variable 0 0 0 0 0 0 0 Total 22 183 300 191 51 11 758 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: C Hours of missing stability measurements in all stability classes: 5 F-47 Page 141 of 178

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Moderately Stable 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 8 0 0 0 0 8 NNE 4 5 0 0 0 0 9 NE 1 0 0 0 0 0 1 ENE 2 0 0 0 0 0 2 E 3 6 7 0 0 0 16 ESE 0 7 1 0 0 0 8 SE 0 8 2 0 0 0 10 SSE 1 6 8 2 0 0 17 5 0 9 14 6 0 0 29 SSW 0 15 27 4 0 0 46 SW 1 12 8 3 0 0 24 WSW 1 13 30 4 0 0 48 W 1 29 21 0 0 0 51 WNW 1 12 4 0 0 0 17 NW 2 3 6 0 0 0 11 NNW 2 1 2 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 19 134 130 19 0 0 302 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 F-48 Pagel42ofl78

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Extremely Stable - 200Ft33Ft Delta-T (F)

Winds I4easured at 33 Feet Wind Speed ( in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 2 5 0 0 0 0 7 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 5 3 0 0 0 8 ESE 0 11 3 0 0 0 14 SE 0 16 1 0 0 0 17 SSE 0 3 1 0 0 0 4 5 0 4 4 0 0 0 8 SSW 0 9 3 0 0 0 12 SW 0 7 1 0 0 0 8 WSW 0 3 7 0 0 0 10 W 0 1 5 0 0 0 6 WNW 0 0 1 0 0 0 1 NW 0 0 0 0 0 0 0 NNW 1 0 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 3 64 29 0 0 0 96 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 F-49 Page 143 of 178

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-I (F)

Winds Measured at 375 Feet Wind Speed f in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 F-50 Page 144of 178

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Moderately Unstable 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed fin mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 F-51 Pagel45ofl78

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Slightly Unstable - 375Ft33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed fin mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 f-52 Pagel46ofI78

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Neutral - 375Ft33Ft DeltaT (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 4 23 34 16 12 89 NNE 1 2 27 14 1 0 45 NE 1 2 8 14 0 0 25 ENE 1 3 12 3 0 0 19 E 0 4 9 1 0 0 14 ESE 0 4 7 21 5 1 38 SE 0 7 2 14 18 6 47 SSE 0 4 6 15 14 5 44 S 0 4 19 34 21 12 90 SSW 1 2 15 17 17 18 70 SW 0 9 30 21 19 9 88 WSw 1 6 7 26 12 2 54 W 1 8 19 24 42 50 144 WNW 2 4 17 76 82 56 237 NW 3 7 22 39 42 8 121 NNW 0 2 27 40 15 17 101 Variable 0 0 0 0 0 0 0 Total 11 72 250 393 304 196 1226 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 5 F-53 Pagel47ofl78

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 5 12 3 1 0 21 NNE 0 2 6 13 0 0 21 NE 1 2 9 10 4 0 26 ENE 0 3 12 5 0 0 20 E 0 0 2 6 3 0 11 ESE 0 4 8 15 5 0 32 SE 0 1 5 9 9 3 27 SSE 0 1 10 10 18 4 43 5 0 3 5 18 28 37 91 SSW 2 3 10 22 35 63 135 SW 1 5 8 22 36 14 86 WSW 0 7 5 19 28 9 68 W 0 3 7 13 22 12 57 WNW 1 4 14 20 28 21 88 NW 2 2 11 8 6 0 29 NNW 1 5 7 6 5 1 25 Variable 0 0 0 0 0 0 0 Total 8 50 131 199 228 164 780 Hours of calm in this stability class: 0 Hours of missing wind measuremen ts in this stability class: 0 Hours of missing stability measuremen ts in all stability classes: 5 F-54 Pagel48ofl78

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Moderately Stable 375Ft33Ft DeltaT (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 2 0 0 2 1 5 NNE 1 0 0 1 1 0 3 NE 0 1 1 4 0 0 6 ENE 0 1 3 0 0 0 4 E 0 1 2 0 1 2 6 ESE 0 1 1 5 7 0 14 SE 1 0 3 6 2 0 12 SSE 0 1 1 6 0 0 8 5 0 1 0 2 3 4 10 SSW 0 2 4 2 3 0 11 SW 1 0 3 5 3 6 18 WSW 0 0 1 6 7 1 15 W 0 0 1 14 5 4 24 WNW 0 0 6 1 9 3 19 NW 0 0 1 0 3 1 5 0 0 1 0 3 2 6 Variable 0 0 0 0 0 0 0 Total 3 10 28 52 49 24 166 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 F-55 Page 149 of 178

LaSalle County Generating Station Period of Record: October December 2014 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 13 47 812 1318 1924 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 3 5 0 8 SSE 0 0 0 2 3 3 8 S 0 0 0 1 2 0 3 58W 0 0 1 0 1 0 2 SW 0 0 1 1 2 0 4 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 2 7 13 3 25 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 F-56 PagelSOoft78

8L1J0 icr nj viva vivu 0 XIN3ddV

There is no errata data for 2014.

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APPENDIX H ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

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Docket No: 50-373 50-374 LASALLE COUNTY STATION UNITS I and 2 Annual Radiological Groundwater Protection Program Report I JanuaryThrough3l December2014 Prepared By Teledyne Brown Engineering Environmental Services Exelon Generationfr LaSalle County Station Marseilles, IL 61341 May 2015 Page 154 of 178

Table Of Contents I. Summary and Conclusions 1 II. Introduction 3 A. Objectives of the RGPP 3 B. Implementation of the Objectives 3 C. Program Description 4 D. Characteristics of Tritium (H-3) 4 III. Program Description 5 A. Sample Analysis 5 B. Data Interpretation 6 C. Background Analysis 7

1. Background Concentrations of Tritium 7 IV. Results and Discussion 9 A. Groundwater Results 9 B. Surface WaterResults 11 C. Drinking Water Well Survey 11 D. Summary of Results Inter-laboratory Comparison Program 12 E. Leaks, Spills, and Releases 12 F. Trends 12 G. Investigations 12 H. ActionsTaken 12 Page 155 of 178

Appendices Appendix A Location Designation Tables Table A-I LaSalle County Station Groundwater Monitoring Sample Point List, 2014 Figures Figure A-I LaSalle County Station Map of Groundwater Monitoring Sampling Locations, 2014.

Appendix B Data Tables Tables Table B-l.1 Concentrations of Tritium, Strontium, Gross Alpha and Gross Beta in Groundwater Samples Collected in the Vicinity of LaSalle County Station, 2014.

Table B-I.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of LaSalle County Station, 2014.

Table B-l.3 Concentrations of Hard-to-Detects in Groundwater Samples Collected as Part of the Radiological Groundwater Protection Program, LaSalle County Station, 2014.

Table B-ll.J Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2014.

Table B-ll.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2014.

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Summary and Conclusions In 2006, Exelon instituted a comprehensive program to evaluate the impact of station operations on groundwater and surface water in the vicinity of LaSalle County Station. This evaluation involved numerous station personnel and contractor support personnel. Following baseline sampling and subsequent recommendations, LaSalles Radiological Groundwater Protection Program (RGPP) program now consists of the four surface water and twenty groundwater well sampling locations. The results for LaSalles RGPP sampling efforts in 2014 are included in this report.

This is the ninth in a series of annual reports on the status of the RGPP conducted at LaSalle County Station. This report covers groundwater and surface water samples, collected from the environment, both on and off station property in 2014. During that time period, 355 analyses were performed on 93 samples from 24 locations (4 surface water and 20 groundwater monitoring locations). The monitoring was conducted by Station personnel.

In assessing all the data gathered for this report, it was concluded that the operation of LaSalle County Station had no adverse radiological impact on the environment, and there are no known active releases into the groundwater at LaSalle County Station.

Strontium-89 and Strontium-90 were not detected in any groundwater samples during 2014.

All gamma-emitting radionuclides attributable to licensed plant operations were not detected in any of the groundwater or surface water samples.

In the case of tritium, Exelon specified that its laboratories achieve a lower limit of detection JO times lower than that required by federal regulation.

Tritium was not detected in surface water samples at concentrations greater than the United States Environmental Protection Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission Reporting Limit) of 20,000 pCi/L. Levels of tritium were detected at concentrations greater than the LLD of 200 pCi/L in 10 of 16 surface water samples analyzed. The tritium concentrations ranged from <LLD to 2,960 +/- 340 pCi/L. Levels of tritium were detected at concentrations greater than the LLD of 200 pCi/L in 33 of 82 groundwater samples analyzed. The tritium concentrations ranged from <LLD to 99,200 +/- 9,920 pCi/L. Elevated tritium levels (>200 pCi/L) observed are associated with the Ui CY tank leak, which occurred in June July, 2010, and historic elevated tritium believed to be associated with the 2001 CY tank leak, as documented in the Stations IOCFR5O.75(g) report.

1 Page 157 of 17$

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on groundwater samples throughout the year in 2014. Gross Alpha (dissolved) was not detected at any groundwater locations. Gross Alpha (suspended) was detected in 2 of 20 samples affecting 2 of 13 groundwater locations analyzed. The concentrations ranged from 4.5 to 7.6 pCiIL. Gross Beta (dissolved) was detected in 11 of 20 samples affecting 7 of 13 groundwater locations analyzed. The concentrations ranged from 3.8 to 22.2 pCi/L. Gross Beta (suspended) was detected in 8 of 20 samples affecting 7 of 13 groundwater locations analyzed. The concentrations ranged from 2.1 to 19.6 pCi/L.

Hard-To-Detect analyses were performed on 13 of the groundwater sampling locations in accordance with the LaSalle RGPP and to aid in establlshing background levels. The analyses included Fe-55, Ni-63, Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235, and U-238. The isotopes of U-234, and U-238 were detected in six samples affecting 3 of 4 groundwater locations. The U-234 concentrations ranged from 0.26 to 22.1 pCiIL. The U-238 concentrations ranged from 0.19 to 13.9 pCiIL. U-234 and U-238 are commonly found in groundwater at low concentrations due to the naturally occurring Radium (Uranium) Decay Series. The isotope U-235 was detected in one groundwater sample at a concentration of 0.63 pCiIL. U-235 can be found in groundwater at low concentrations due to the naturally occurring Actinium Decay Series.

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Introduction The LaSalle County Station (LSCS), consisting of two boiling water reactors, each rated for 3,546 MWt, owned and operated by Exelon Corporation, is located in LaSalle County, Illinois. Unit No. I went critical on 16 March 1982.

Unit No. 2 went critical on 02 December 1983. The site is located in northern Illinois, approximately 75 miles southwest of Chicago, Illinois.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) on samples collected in 2014.

A. Objectives of the RGPP The long-term objectives of the RGPP are as follows:

1. Identify suitable locations to monitor and evaluate potential impacts from station operations before significant radiological impact to the environment and potential drinking water sources.

2. Understand the local hydrogeologic regime in the vicinity of the station and maintain up-to-date knowledge of flow patterns on the surface and shallow subsurface.

3. Perform routine water sampling and radiological analysis of water from selected locations.

4. Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner.

5. Regularly assess analytical results to identify adverse trends.

6. Take necessary corrective actions to protect groundwater resources.

B. Implementation of the Objectives The objectives identified have been implemented at LaSalle County Station as discussed below:

Exelon and its consultant identified locations as described in the 2006 Phase I study. Phase 1 studies were conducted by Conestoga Rovers and Associates (CRA) and the results and conclusions were made available to state and federal regulators.

1. The LaSalle County Station reports describe the local hydrogeologic regime. Periodically, the flow patterns on the Page 159 of 178

surface and shallow subsurface are updated based on ongoing measurements.

2. LaSalle County Station will continue to perform routine sampling and radiological analysis of water from selected locations.

3. LaSalle County Station has implemented procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner.

4. LaSalle County Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.

C. Program Description

1. Sample Collection Sample locations can be found in Table AI, Appendix A.

Groundwater and Surface Water Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following EPA methods. Both groundwater and surface samples water are collected. Sample locations, sample collection frequencies and analytical frequencies are controlled in accordance with approved station procedures. Contractor and/or station personnel are trained in the collection, preservation management, and shipment of samples, as well as in documentation of sampling events.

Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, as well as nuclear industry audits. Station personnel review and evaluate all analytical data deliverables as data are received.

Analytical data results are reviewed by both station personnel and an independent hydrogeologist for adverse trends or changes to hydrogeologic conditions.

D. Characteristics of Tritium (H-3)

Tritium (chemical symbol H-3) is a radioactive isotope of hydrogen. The most common form of tritium is tritium oxide, which is also called tritiated water. The chemical properties of tritium are essentially those of ordinary hydrogen.

Tritiated water behaves the same as ordinary water in both the Page 160 of 178

environment and the body. Tritium can be taken into the body by drinking water, breathing air, eating food, or absorption through skin. Once tritium enters the body, it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. Within one month or so after ingestion, essentially all tritium is cleared. Organically bound tritium (tritium that is incorporated in organic compounds) can remain in the body for a longer period.

Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity, and in special production reactors, where the isotopes lithium-7 and/or boron-lO are activated to produce tritium. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non tritiated water in the subsurface, and therefore tritiated water will travel at the same velocity as the average groundwater velocity.

Tritium has a half-life of approximately 12.3 years. It decays spontaneously to helium-3 (3He). This radioactive decay releases a beta particle (low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium is one of the least dangerous radionuclides because it emits very weak radiation and leaves the body relatively quickly. Since tritium is almost always found as water, it goes directly into soft tissues and organs. The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.

Ill. Program Description A. Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the LaSalle County Station RGPP in 2014. Sample and analysis and frequency is based upon well location, assessed risk and site hydrogeology as described in the RGPP.

In order to achieve the stated objectives, the current program includes the following analyses:

1. Concentrations of gamma emitters in groundwater and surface water.

2. Concentrations of strontium in groundwater.

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3. Concentrations of tritium in groundwater and surface water.

4. Concentrations of Gross Alpha, Dissolved and Suspended and Gross Beta, Dissolved and Suspended in groundwater.

5. Concentrations of Am-241 in groundwater.

6. Concentrations of Cm-242 and Cm-243/244 in groundwater.

7. Concentrations of Pu-238 and PU-239/240 in groundwater.

8. Concentrations of U-234, U-235 and U-238 in groundwater.

9. Concentrations of Fe-55 in groundwater.

10. Concentrations of Ni-63 in groundwater.

B. Data Interpretation The radiological data collected prior to LaSalle County Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, LaSalle County Station was considered operational at initial criticality. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is specified by federal regulation as a minimum sensitivity value that must be achieved routinely by the analytical parameter.

2. Laboratory Measurements Uncertainty The estimated uncertainty in measurement of tritium in environmental samples is frequently on the order of 50% of the measurement value.

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from calibration standards, sample volume or weight measurements, sampling uncertainty and other factors. Exelon reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated. Exelon reports the TPU by following the result with plus Page 162 of 178

or minus +/- the estimated sample standard deviation, as TPU, that is obtained by propagating all sources of analytical uncertainty in measurements.

Analytical uncertainties are reported at the 95% confidence level in this report for reporting consistency with the AREOR.

C. Background Analysis A pre-operational radiological environmental monitoring program (pre operational REMP) was conducted to establish background radioactivity levels prior to operation of the Station. The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation, fall-out, domestic water, surface water, precipitation, marine life, and foodstuffs. The results of the monitoring were detailed in the report entitled, Environmental Radiological Monitoring for LaSalle County Nuclear Power Station, Commonwealth Edison Company, Annual Reports for the years 1979 and 1981. The pre-operational REMP contained analytical results from samples collected from the surface water and groundwater.

1. Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others. Additional detail may be found by consulting references (CRA 2006).

a. Tritium Production Tritium is created in the environment from naturally occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, Cosmogenic tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle. Below ground, lithogenic tritium is produced by the bombardment of natural lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of lithium in rock. The lithogenic tritium is introduced directly to groundwater.

A major anthropogenic source of tritium and strontium-90 comes from the former atmospheric testing of thermonuclear Page 163 of 178

weapons. Levels of tritium in precipitation increased significantly during the 1 950s and early I 960s, and later with additional testing, resulting in the release of significant amounts of tritium to the atmosphere. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research and weapons production continue to influence tritium concentrations in the environment.

b. Precipitation Data Precipitation samples are routinely collected at stations around the world for the analysis of tritium and other radionuclides. Two publicly available databases that provide tritium concentrations in precipitation are Global Network of Isotopes in Precipitation (GNIP) and USEPAs RadNet database. GNIP provides tritium precipitation concentration data for samples collected world wide from 1960 to 2006.

RadNet provides tritium precipitation concentration data for samples collected at stations throughout the U.S. from 1960 up to and including 2006. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons. Tritium concentrations in surface water showed a sharp decline up until 1975 followed by a gradual decline since that time. Tritium concentrations in Midwest precipitation have typically been below 100 pCi/L since around 1980. LaSalles 1979 or 1981 pre-operational REMP showed precipitation tritium concentrations >300 pCi/L. Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.

Surface Water Data Tritium concentrations are routinely measured in large surface water bodies, including Lake Michigan and the Mississippi River. Illinois surface water data were typically less than 100 pCi/L. Illinois River 1-1-3 results have shown

>200 pCi/L, as evidenced in LaSalles REMP program sample results. This could be attributable to releases from Braidwood and Dresden upstream.

The USE PA RadNet surface water data typically has a Page 164 of 178

reported Combined Standard Uncertainty of 35 to 50 pCi/L.

According to USEPA, this corresponds to a +/- 70 to 100 pCi/L 95% confidence bound on each given measurement.

Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 100 pCi/L.

The radio-analytical laboratory is counting tritium results to an Exelon specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 240 pCi/L or 140 +/- 100 pCi/L. Clearly, these sample results cannot be distinguished as different from background at this concentration.

IV. Results and Discussion A. Groundwater Results Groundwater Samples were collected from onsite wells throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below.

Tritium Samples from 20 locations were analyzed for tritium activity.

Tritium values ranged from <LLD to 99,200 pCi/L at well MW-LS-104S. Based on the hyrogeological study conducted at LaSalle, there is no feasible pathway into a drinking water supply.

Based on established aquifer flow paths the location most representative of potential offsite release into groundwater was also less than the detection limit (Table B-l.1, Appendix B).

Strontium Twenty samples from 13 groundwater locations were analyzed for Strontium-89 and Strontium-90. The results were less than the required detection limit of 10 pCi/liter for Strontium-89 and less than the required detection timit of 1 .0 pCi/liter for Strontium-90 (Table B-l.1, Appendix B).

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Gross Alpha and Gross Beta (dissolved and suspended)

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on groundwater samples throughout the year in 2014. Gross Alpha (dissolved) was not detected at any groundwater locations. Gross Alpha (suspended) was detected in 2 of 20 samples affecting 2 of 13 groundwater locations analyzed. The concentrations ranged from 4.5 to 7.6 pCi/L. Gross Beta (dissolved) was detected in 11 of 20 samples affecting 7 of 13 groundwater locations analyzed. The concentrations ranged from 3.8 to 22.2 pCi/L. Gross Beta (suspended) was detected in 8 of 20 samples affecting 7 of 13 groundwater locations analyzed. The concentrations ranged from 2.1 to 19.6 pCiIL. These concentrations of Gross Alpha and Gross Beta, which are slightly above detectable levels, are considered to be background and are not the result of plant effluents (Table B-l.1, Appendix B).

Gamma Emitters Naturally occurring K-40 was detected in one of 20 samples analyzed at a concentration of 65 pCIIL. No other gamma emitting nuclides were detected in any of the samples analyzed (Table B-l.2, Appendix B).

Hard-To-Detect Hard-To-Detect analyses were performed on 13 of the groundwater sampling locations in accordance with the LaSalle RGPP and to aid in establishing background levels. The analyses included Fe-55, Ni-63, Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235, and U-238. The isotopes of U-234, and U-238 were detected in six samples affecting 3 of 4 groundwater locations. The U-234 concentrations ranged from 0.26 to 22.1 pCiIL. The U-238 concentrations ranged from 0.19 to 13.9 pCiIL. U-234 and U-238 are commonly found in groundwater at low concentrations due to the naturally occurring Radium (Uranium) Decay Series. The isotope U-235 was detected in one groundwater sample at a concentration of 0.63 pCi/L. U-235 can be found in groundwater at low concentrations due to the naturally occurring Actinium Decay Series. The concentrations of U-234, U-235, and U-238 discussed above are considered to be background and are not the result of plant effluents (Table 5-1.3, Appendix B).

All other hard-to-detect nuclides were not detected at concentrations greater than their respective MDCs.

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B. Surface Water Results Surface Water Samples were collected from on and off-site surface water locations throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below.

Tritium Samples from four locations were analyzed for tritium activity. Ten of 16 samples from 4 surface water locations did show activity above 200 pCiIL. The concentrations ranged from 234 to 2,960 pCiIL. Based on the hyrogeological study conducted at LaSalle, there is no feasible pathway into a drinking water supply. Based on established aquifer flow paths the location most representative of potential offsite release into groundwater was also less than the detection limit. (Table Bll.1, Appendix B).

Strontium Strontium-89 and strontium-90 analyses were not performed in 2014 on surface water samples.

Gross Alpha and Gross Beta (dissolved and suspended)

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were not performed in 2014 on surface water samples.

Gamma Emitters No gamma emitting nuclides were detected in any of the samples analyzed. (Table B-ll.2, Appendix B).

C. Drinking Water Well Survey A drinking water well survey was conducted during the summer 2006 by CRA (CRA 2006) around the LaSalle County Station. This survey concluded that no residents in the vicinity of the plant utilize the shallow water aquifer as a drinking water supply. Site hydrological studies of aquifer flow and permeation rates from the shallow aquifer to the deep aquifer concluded that there is no feasible dose receptor via a ground water pathway at LaSalle.

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D. Summary of Results Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE and Environmental Inc. (Midwest Labs) are presented in the AREOR.

E. Leaks, Spills, and Releases There were no new leaks identified at LaSalle Station during the reporting period.

F. Trends Analysis results from samples continue to be trended in order to assess impact to groundwater at LaSalle Station. There were no new leaks identified in the reporting period. Sample data from the plume arising from the 2010 UI CY tank leak is being trended per the LaSalle RGPP.

The plume had been dispersing with groundwater flow) and extraction wells have been installed to provide additional control of the plume migration (see Section H.3). Currently, no tritium has migrated offsite, and tritium migration offsite is not expected.

G. Investigations No new investigations were carried out during the reporting period.

H. Actions Taken

1. Compensatory Actions No compensatory actions were taken during the reporting period.

2. Installation of Monitoring Wells No new monitoring wells have been installed during the reporting period.

3. Actions to Recover/Reverse Plumes Two (2) extraction wells (RW-LS-I 005 and RW-LS-101S) have been installed to control the migration of the tritium plume near UI CY tank.

RW-LS-100S became operational in October2012. RW-LS-IO1S became operational in April 2014.

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APPENDIX A LOCATION DESIGNATION Page 169 of 178

TABLE A-I LaSalte County Station Groundwater Monitoring Sample Point List, 2014 Site Site Type SW-LS-101 Surface Water SW-LS-1 02 Surface Water SW-LS-1 03 Surface Water SW-LS-104 Surface Water SW-LS-105 Surface Water SW-LS-106 Surface Water MW-LS-1OIS Monitoring Well MW-LS-102S Monitoring Well MW-LS-103S Monitoring Well MW-LS-104S Monitoring Well MW-LS-105S Monitoring Well MW-LS-106S Monitoring Well MW-LS-107S Monitoring Well MW-LS-108S Monitoring Well MW-LS-109S Monitoring Well MW-LS-1IOS Monitoring Well MW-LS-1 11S Monitoring Well MW-LS-112S Monitoring Well MW-LS-113S Monitoring Well HP-2 Monitoring Well HP-5 Monitoring Well HP-7 Monitoring Well HP-b Monitoring Well RW-LS-bOOS Extraction Well RW-LS-1O1S Extraction Well TW-LS-114S Monitoring Well TW-LS-1 15S Monitoring Well flN-LS-1 16S Monitoring Well TW-LS-1 1 7S Monitoring Well TW-LS-1 1 8S Monitoring Well TW-LS-1 19S Monitoring Well TW-LS-120S Monitoring Well TW-LS-121S Monitoring Well Table A-i Page 170 of 178

S 4

WAD 20005 LEGEND EDGE OF WATER STORM WATER DITCN ESTIMATED LIMITS OF ENGINEERED FILIftIATURAL CLAY CONTACT TRAN S M ION ION TOWER MONITORING WB.L LDCAT1ON NOON FOR FURThER EVALUATION (ACE LASALLU(

SURFACE WATER FLOW STAFF OAUOE LOCATION RECOVERY WELL LOCATION AND IDENTTFER APPROXIMATE TEMPORERY MONITORINO WELL LOCATION AND IDENTEIER SCALE VERIFICATION TMID SAP MEASURES rON ORITINPL. ADJUST SCALE ACCORDINGLY.

EXELON GENERATION COMPANY, LLC LaSALLE GENERATING STATION MARSEILLES, ILLINOIS FLEETWIDE ASSESSMENT MONITORING WELL LOCATIONS AND SURFACE WATER FEATURES ADDITIONAL MONITORING WELL LOCATION KEY PLAN

APPENDIX B DATA TABLES Page 172 of 178

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2014 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Cr-A (Dis) Cr-A (Sus) Cr-B (Dis) Cr-B (Sus)

HP-b 03/26/14 < 169 HP-b 06/17/14 < 195 < 3.8 < 0.6 < 0.9 < 1.7 < 1.8 < 2.8 HP-b 09/25/14 < 192 HP-b 11/10/14 < 182 HP-2 03/26/14 < 191 HP-2 06/17/14 < 194 < 4.0 < 0.6 < 1.0 < 2.2 4.5 +/- 1.3 8.2 +/- 2.5 HP-2 09/25/14 < 187 HP-2 11/10/14 < 180 HP-5 03/26/14 < 162 HP-5 06/17/14 < 196 < 4.9 < 0.7 < 1.3 4.5 +/- 1.9 < 2.3 < 2.8 HP-5 09/25/14 < 187 HP-5 11/10/14 < 183 HP-7 03/26/14 < 171 HP-7 06/17/14 < 196 < 4.6 < 0.6 < 1.2 < 1.7 8.0 +/- 1.8 < 2.8 HP-7 09/25/14 < 187 HP-7 11/10/14 < 184 MW-LS-104S 03/25/14 Original 85400 +/- 8570 MW-LS-104S 03/25/14 Recount 99200 +/- 9920 MW-LS-104S 06/17/14 57600 +/- 4860 < 5.5 < 0.6 < 1.5 < 5.6 <2.1 7.3 +/- 2.1 MW-LS-104S 09/24/14 38600 +/- 3910 < 2.7 < 0.5 < 0.7 < 3.5 < 2.6 6.0 +/- 1.6 MW-LS-104S 11/11/14 35100 +/- 3560 < 4.0 < 0.7 < 0.8 < 1.0 < 1.5 < 1.5 MW-LS-105S 03/25/14 412 +/- 142 MW-LS-105S 06/17/14 < 196 < 3.9 < 0.5 < 1.3 < 2.3 3.8 +/- 1.3 19.6 +/- 3.0 MW-LS-105S 09/25/14 < 185 MW-LS-105S 11/10/14 < 158 MW-LS-106S 03/26/14 < 192 MW-LS-106S 06/18/14 < 193 MW-LS-107S 03/25/14 < 189 MW-LS-107S 06/18/14 < 193 <4.1 <0.7 < 8.3 7.6 +/- 3.4 < 8.5 17.4 +/- 3.2 MW-LS-107S 09/25/14 < 190 MW-LS-107S 11110/14 < 159 MW-LS-J11S 03/26/14 < 185 < 5.8 < 1.0 < 3.1 < 1.9 22.2 +/- 7.0 9.7 +/- 2.7 MW-LS-111S 06/18/14 < 198 < 3.7 < 0.5 < 5.4 < 1.8 < 8.2 < 2.5 MW-LS-111S 09/25/14 < 187 MW-LS-11IS 11/10/14 < 161 OIL SEPARATOR 03/25/14 Original 3210 +/- 389 OIL SEPARATOR 03/25/14 Recount 3690 +/- 414 OIL SEPARATOR 06/17/14 3230 +/- 372 OIL SEPARATOR 09124/14 1770 +/- 234 OIL SEPARATOR 11/10/14 681 +/- 140 RW-LS-100S 03/21/14 39400 +/- 3980 RW-LS-100S 06/17/14 Original 88700 +/- 6020 <4.7 <0.6 < 0.9 < 1.1 6.4 +/- 1.4 <2.9 RW-LS-IOOS 06/17/14 Reanalysis 78800 +/- 6330 RW-LS-bOOS 09/24/14 93600 +/- 9350 < 3.3 < 0.7 < 0.6 < 0.3 4.7 +/- 0.9 < 1.7 RW-LS-IOOS 11/11/14 62800 +/- 4800 < 2.6 < 0.8 < 0.8 < 1.0 6.3 +/- 1.0 < 1.5 RW-LS-1OIS 06/17/14 Original 25200 +/- 2550 < 3.5 < 0.6 < 0.7 < 1.1 4.8 +/- 1.3 < 2.9 RW-LS-1O1S 06/17/14 Reanalysis 25100 +/- 2550 RW-LS-JO1S 09/24/14 19800 +/- 2030 < 4.7 < 0.8 < 0.8 < 0.4 6.9 +/- 1.2 < 1.7 RW-LS-JOIS 11/11/14 13300 +/- 1380 < 2.9 < 0.5 < 1.0 < 1.0 6.8 +/- 1.2 < 1.5 flN-LS-1 14S 03/25/14 < 170 TW-LS-114S 06/17/14 < 193 TW-LS-114S 09/25/14 < 191 TW-LS-114S 11/10/14 < 184 TW-LS-1 15S 03/25/14 < 163 PN-LS-1 15S 06/17/14 < 195 TW-LS-115S 09124/14 < 189 TN-LS-115S 11/10/14 < 189 TW-LS-1 165 03/25/14 12800 +/- 1340 TW-LS-116S 06/17/14 10800 +/- 1130 WV-LS-116S 09/24/14 9990 +/- 1050 1W-LS-116S 11/11/14 9390 +/- 987 < 4.0 < 0.5 < 2.4 < 1.1 < 2.9 2.1 +/- 1.1 B-i Page 173 of 178

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2014 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

TW-LS-117S 03/25/14 < 160 TW-LS-117S 06/17/14 < 192 TW-LS-117S 09/25/14 < 189 flN-LS-117S 11/10/14 < 188 TW-LS-118S 03/25/14 35900 +/- 3650 TW-LS-118S 06/17/14 39800 +/- 4010 TW-LS-118S 09/24/14 33400 +/- 3370 TW-LS-118S 11/11/14 18000 +/- 1840 < 2.9 < 0.5 < 2.1 < 1.0 < 2.5 < 1.5 TW-LS-1195 03/25/14 Original 286 +/- 118 TW-LS-119S 03/25/14 Recount 404 +/- 139 TW-LS-1195 06/17/14 585 +/- 154 TW-LS-119S 09/24/14 1280 +/- 189 TW-LS-119S 11/11/14 987 +/- 162 < 3.0 < 0.9 < 2.4 < 8.5 7.1 +/- 2.2 5.5 +/- 2.1 TW-LS-1205 03/25/14 < 171 TW-LS-120S 06/17/14 < 195 TW-LS-120S 09/24/14 < 190 1W-LS-1205 11/10/14 < 188 TW-LS-121S 03/25/14 < 170 1W-LS-121S 06/17/14 < 199 TW-LS-1215 09/24/14 < 191 TiN-LS-121S 11/10/14 < 186 B-2 Page 174 of 178

TABLE B-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2014 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA SITE COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 DATE HP-b 06(17114 < 12 <9 <1 <1 <3 <1 <2 <1 <2 <11 <1 <1 <18 <5 HP-2 06/17/14 < 15 <42 <1 <1 <4 <1 <2 <2 <3 <15 <1 <1 <21 <6 HP-5 06/17/14 < 10 < 26 <1 <1 <2 <1 <2 <1 <2 <11 <1 <1 <15 <4 HP-7 06/17/14 < 14 < 12 <1 <2 <4 <1 <3 <2 <3 <13 <1 <1 <19 <6 MW-LS-104S 06/17/14 < 10 <25 <1 <1 <2 <1 <2 <1 <2 <9 <1 <1 <13 <4 MW-LS-104S 09/24/14 < 9 <6 <1 <1 <2 <1 <1 <1 <2 <26 <1 <1 <25 <7 MW-LS-104S 11/11/14 < 15 < 41 <1 <1 <3 <1 <2 <2 <2 <14 <1 <1 <20 < 5 MW-LS-105S 06/17/14 < 13 < 10 <1 <1 <4 <1 <3 <2 <3 <12 <1 <1 <19 < 5 MW-LS-106S 06/18/14 <9 <8 <1 <1 <2 <1 <2 <1 <2 <8 <1 <1 <12 <3 MW-LS-107S 06/18/14 < 12 <24 <1 <1 <3 <1 <2 <1 <2 <10 <1 <1 <15 <6 MW-LS-1I1S 03/26/14 <9 < 5 <1 <1 <2 <1 <1 <1 <1 <12 <1 <1 <14 <4 MW-LS-J11S 06/18/14 < 14 < 11 <1 <2 <3 <1 <3 <2 <3 <14 <1 <1 <19 <6 RW-LS-JOOS 06/17/14 < 14 < 11 <1 <2 <3 <1 <3 <2 <3 <15 <1 <1 <21 < 5 RW-LS-100S 09124114 < 11 < 18 <1 <1 <2 <1 <2 <1 <2 <.32 <1 <1 <24 < 10 RW-LS-100S 11/11/14 < 10 < 20 <1 <1 <2 <1 <2 <1 <2 <9 <1 <1 <12 < 4 w RW-LS-1O1S 06/17/14 < 13 <9 <1 <1 <3 <1 <2 <1 <2 <12 <1 <1 <19 <4 RW-LS-1O1S 09/24/14 < 13 < 7 <1 <1 <3 <1 <2 <1 <2 <40 <1 <1 <34 < 8 RW-LS-1O1S 11/11/14 < 11 65 +/- 27<1 <1 <3 <1 <2 <1 <2 <12 <1 <1 <16 < 5 TW-LS-116S 11/11/14 < 12 < 9 <1 <1 <3 <1 <2 <1 <2 <11 <1 <1 <18 <6 TW-LS-118S 11/11/14 <8 < 7 <1 <1 <2 <1 <1 <1 <2 <8 <1 <1 <12 <3 TW-LS-119S 11/11/14 <8 <22 <1 <1 <2 <1 <2 <1 <2 <7 <1 <1 <10 <4 CD C

00 BOLDED VALUES INDICATE LCD COULD NOT BE MET DUE TO AGE OF SAMPLE AT TIME OF RECEIPT AT THE LABORATORY

TABLE 8-13 CONCENTRATIONS OF HARD-TO-DETECTS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, LASALLE COUNTY STATION, 2014 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA SITE COLLECTION Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 Fe-55 Ni-63 DATE HP-1O 06/17/14 - - - - - - - - < 85 < 4.7 HP-2 06/17/14 - - - - - - - - < 166 <4.8 HP-5 06/17/14 - - - - - - - - < 89 < 4.5 HP-7 06/17/14 - - - - - - - - < 152 <4.8 MW-LS-104S 06/17/14 <0.02 <0.06 <0.04 <0.08 <0.03 0.93 +/- 0.26 <0.06 0.93 +/- 0.26 < 135 <4.8 MW-LS-104S 09/24/14 < 0.05 < 0.07 < 0.07 < 0.09 < 0.09 0.78 +/- 0.27 < 0.09 0.98 +/- 0.31 < 185 < 4.1 MW-LS-104S 11/11/14 <0.13 <0.03 <0.03 < 0.06 <0.12 1.07 +/- 0.28 <0.02 0.95 +/- 0.26 < 179 <3.9 MW-LS-105S 06/17/14 - - - - - - - - < 112 <4.6 MW-LS-107S 06/18/14 - - - - - - - - < 190 < 5.0 MW-LS-1I1S 03/26/14 < 0.12 < 0.04 < 0.10 < 0.17 < 0.07 22.1 +/- 2.48 0.63 +/- 0.27 13.9 +/- 1.70 < 187 < 3.6 MW-LS-IIIS 06/18/14 - - - - - - - - < 189 < 4.8 RW-LS-IOOS 06/17/14 - - - - - - - - < 157 < 4.8 RW-LS-IOOS 09/24/14 <0.08 <0.04 <0.02 <0.08 <0.10 <0.08 <0.04 <0.03 < 165 <4.0 RW-LS-100S 11/11/14 <0.20 <0.08 <0.08 <0.05 <0.05 <0.05 <0.02 <0.02 < 175 <4.7 RW-LS-IO1S 06/17/14 < 0.08 < 0.02 < 0.10 < 0.02 < 0.07 0.31 +/- 0.16 < 0.06 0.35 +/- 0.17 < 70 < 5.0 RW-LS-1O1S 09/24/14 < 0.04 < 0.07 < 0.07 < 0.10 < 0.04 0.26 +/- 0.14 < 0.08 0.19 +/- 0.11 < 167 <4.0 RW-LS-1OIS 11/11/14 < 0.09 < 0.02 < 0.02 < 0.14 < 0.05 < 0.02 < 0.08 < 0.02 < 120 < 3.7 TW-LS-116S 11/11/14 - - - - - - - - < 177 < 4.0 TW-LS-118S 11/11/14 - - - - - - - - < 173 <4.6 TW-LS-119S 11/11/14 - - - - - - - - < 146 <4.0 0

00 CD C.,

C 00

TABLE B-ILl CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2014 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA COLLECTION SITE DATE H-3 SW-LS-101 03/20/14 < 192 SW-LS-101 06/17/14 502 +/- 149 SW-LS-101 09/25/14 < 189 SW-LS-101 11/10/14 < 158 SW-LS-102 03/20/14 < 193 SW-LS-102 06/18/14 299 +/- 137 SW-LS-102 09/25/14 2960 +/- 340 SW-LS-102 11/10/14 950 +/- 159 SW-LS-103 03/20/14 638 +/- 156 SW-LS-103 06/18/14 600 +/- 155 SW-LS-103 09/25/14 465 +/- 144 SW-LS-103 11/10/14 234 +/- 113 SW-LS-106 03/21/14 645 +/- 154 SW-LS-106 06/18/14 < 196 SW-LS-106 09/25/14 < 188 SW-LS106 11/12114 263 +/- 115 B-5 Page 177 of 178

TABLE B-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2014 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA SITE COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 DATE SW-LS-101 06/17/14 <8 <6 <1 <1 <2 <1 <1 <1 <1 <7 <1 <1 <10 <3 SW-LS-102 06/18/14 <11 <25 <1 <1 <2 <1 <2 <1 <2 <9 <1 <1 <13 <4 SW-LS-103 06/18/14 <14 <29 <1 <1 <3 <1 <2 <1 <3 <13 <1 <1 <18 <4 SW-LS-106 06/18/14 <12 <33 <1 <1 <3 <1 <2 <1 <2 <10 <1 <1 <17 <6 C.

00 C

a 00