CAMECO RESOURCESCROW BUTTE OPERATION

86 Crow Butte RoadP.O. Box 169 (308) 665-2215Crawford, Nebraska 69339-0169 (308) 665-2341 - FAX

February 24, 2012

CERTIFIED MAILRETURN RECEIPT REQUESTED

Attn: Document Control Desk, Deputy DirectorDecommissioning and Uranium Recovery Licensing DirectorateDivision of Waste Management and Environmental ProtectionOffice of Federal and State Materials and Environmental Management ProgramsMailstop T8-F5U.S. Nuclear Regulatory CommissionWashington, DC 20555-0001

Re: Source Materials License SUA-1534Docket No. 40-8943IJ 13P Monitor Well Excursion

Dear Deputy Director:

On October 4, 2011, during routine biweekly water sampling of Cameco Resources, Crow ButteOperation (CBO) commercial monitor well IJ13P, the single control limit (SCL) for alkalinity wasexceeded. As required by License Condition 11.2 of Source Materials License SUA-1534, a secondsample was collected from U13P within 48 hours and analyzed for the three excursion indicatorparameters. The results of the second sample also exceeded the single control limit for alkalinity.

In accordance with License Condition 11.2, CBO increased the sampling frequency for IJ13P toweekly. Weekly samples were obtained from October 5, 2011, through February 21, 2012. Thesamples collected on January 17, 24, 31, and February 7, 14, and 21, 2012, were below the excursioncriteria from Section B. 1 of the permit. Based on these results, CBO is removing IJ13P fromexcursion status and is returning it to routine biweekly sampling. Attached are copies of the analyticaldata for each of the last six weekly samples. Also attached, please find graphs depicting alkalinity,conductivity, and chloride results from October 11, 2011, through February 21, 2012.

CAMECO RESOURCESCROW BUTTE OPERATION

Document Control Dcsk, Deputy DircctorFebruary 24, 2012Page 2

If you have any questions or require any further information, please do not hesitate to call me at (308)665-2215 Ext. 114.

Sincerely,CAMECO RESOURCESCROW BUTTE OPERATION

Larry Teahon

SHEQ Manager

Enclosures: As Stated

cc: Ronald Burrows - NRCCBO - File

ec: CR - Cheyenne

Sample Date

Analysis Date

1/17/2012

1/17/2012

Crow Butte ProjectMonitor Well Laboratory Report

Alkalinity Conductivity Chloride

Well ID (mg/L) Alk SCL Alk MCL (pmho/cm) Cond SCL Cond MCL (mg/L) Cl SCL Cl MCL

CM11-12

CM11-13

CM11-14

CMII-15

CM11-16

CM11-17

CM11-18

CM11-19

CM6-10

CM6-9

CM8-1

CM8-2

CM8-3

CM8-4

CM8-5

CM8-6

CM8-7

CM8-8

CM8-9

CM9-10

CM9-11

CM9-8

CM9-9

IJ13P

SMl1-1

297

297

303

301

301

301

303

302

316

290

290

300

305

298

300

296

297

307

309

299

299

299

302

380

164

433

418

468

431

451

438

445

.448

429

428

455

395

432

428

425

432

425

418

452

359

445

418

475

415

240

361

348

390

359

376

365

371

373

358

356

379

329

360

356

354

360

354

348

377

299

371

348

396

346

200

1850

1850

1850

1830

1820

1810

1830

1830

2010

1960

1970

1950

1970

1940

1950

1940

1940

1920

1900

1810

1840

1830

1830

1680

420

2794 2328

2722

3024

2765

2794

2837

2722

2779

2952

2866

3110

3125

3211

3125

3067

3067

3154

3211

3053

2390

2707

2952

2923

2900

605

2268

2520

2304

2328

2364

2268

2316

2460

2388

2592

2604

2676

2604

2556

2556

2628

2676

2544

1992

2256

2460

2436

2417

504

181

190

185

185

183

182

182

184

199

185

190

190

193

195

191

192

189

192

188

184

185

183

185

143

6.3

268

291

357

289

276

301

297

300

327

285

372

334

367

328

328

317

396

415

325

292

284

366

334

278

24

223

242

298

241

230

251

247

250

272

238

310

278

306

274

274

264

330

346

271

244

236

305

278

232

20

Wednesday, January 18, 2012 Page 1 of 3

Sample Date

Analysis Date

1/24/2012

1/24/2012

Crow Butte ProjectMonitor Well Laboratory Report

Alkalinity Conductivity Chloride

Well ED (mg/L) Alk SCL Alk MCL (Atmho/cm) Cond SCL Cond MCL (mgfL) C0 SCL CI MCL

CM10-10

CM10-11

CM1O-12

CM10-13

CM10-14

CM1O-15

CM10-16

CM10-17

CM10-8

CM1O-9

CM7-11

CM7-12

CM7-13

CM7-14

CM7-15

CM7-16

IJ13P

PR15

PR8

SM1O-16

SM10-17

SM10-18

SM10-19

SM10-20

SM10-21

326

319

315

323

337

346

322

329

319

322

293

292

292

292

298

305

360

264

216

257

248

238

247

242

244

475

481

446

481

490

504

484

475

475

468

432

422

436

422

432

441

415

444

484

382

374

346

369

360

360

396

401

372

401

408

420

403

396

396

390

360

352

364

352

360

367

346

370

403

318

312

288

307

300

300

1900

1850

1850

1840

1770

1720

1820

1830

1880

1870

1940

1940

1950

1970

1970

1980

1580

950

770

610

580

540

560

560

2736

2808

2923

2779

2578

2491

2650

2664

2707

2693

2817

2794

2841

2772

2822

2831

2900

2792

2866

850

835

763

778

792

2280

2340

2436

2316

2148

2076

2208

2220

2256

2244

2347

2328

2368

2310

2352

2359

2417

2327

2388

708

696

636

648

660

194

180

179

174

173

174

172

172

188

185

195

193

194

193

195

196

136

62

48

13

11

8.1

7.6

12

275

288

327

287

251

253

253

248

265

269

281

289

287

274

284

281

278

268

282

28

28

24

25

27

229

240

272

239

209

211

211

206

221

224

234

241

239

228

236

234

232

223

235

23

23

20

21

22

590 806 672 16 27 23

Tuesday. January 24, 2012 Page 1 of2Tuesday, January 24, 2012 Page I of 2

Sample Date

Analysis Date

1/31/2012

1/31/2012

Crow Butte ProjectMonitor Well Laboratory Report

Alkalinity Conductivity Chloride

Well ID (mg/L) Alk SCL Alk MCL (ftmho/cm) Cond SCL Cond MCL (mg/L) Cl SCL Cl MCL

CM11-12

CM11-13

CM1I-14

CM11-15

CM11-16

CM11-17

CM11-18

CM11-19

CM6-10

CM6-9

CM8-1

CM8-2

CM8-3

CM8-4

CM8-5

CM8-6

CM8-7

CM8-8

CM8-9

CM9-10

CM9-11

CM9-8

CM9-9

IJ13P

SM1l-1

294

297

302

298

302

302

300

299

315

291

295

299

307

298

300

297

297

307

312

295

299

298

299

339

163

433

418

468

431

451

438

445

448

429

428

455

395

432

428

425

432

425

418

452

359

445

418

475

415

240

361

348

390

359

376

365

371

373

358

356

379

329

360

356

354

360

354

348

377

299

371

348

396

346

200

1850

1850

1850

1820

1810

1810

1830

1830

2010

1950

1950

1940

1960

1920

1930

1920

1920

1900

1880

1810

1840

1830

1830

1470

410

2794 2328

2722

3024

2765

2794

2837

2722

2779

2952

2866

3110

3125

3211

3125

3067

3067

3154

3211

3053

2390

2707

2952

2923

2900

605

2268

2520

2304

2328

2364

2268

2316

2460

2388

2592

2604

2676

2604

2556

2556

2628

2676

2544

1992

2256

2460

2436

2417

504

186

191

187

183

183

183

185

188

202

188

191

193

194

190

190

191

188

190

186

186

189

185

185

127

5.9

268

291

357

289

276

301

297

300

327

285

372

334

367

328

328

317

396

415

325

292

284

366

334

278

24

223

242

298

241

230

251

247

250

272

238

310

278

306

274

274

264

330

346

271

244

236

305

278

232

20

Iuesaay, January 3i, 2U01 Page I of 3

Ow

Sample Date 2n/2o]2 Crow Butte Project

Analysis Date 2/72O12 Monitor Well Laboratory Report

Alkalinity Conductivity ChlorideWell ID (mg/L) Alk SCL Alk MCL (!mho/cm) Cond SCL Cond MCL (rag/L) CI SCL C! MCL

CM10-10 328 475 396 1900 2736 2280 190 275 229

CM1O-11 321 481 401 1870 2808 2340 182 288 240

CM10-12 319 446 372 1870 2923 2436 178 327 272

CM10-13 323 481 401 1830 2779 2316 174 287 239

CM1O-14 338 490 408 1770 2578 2148 174 251 209

CM10-15 343 504 420 1720 2491 2076 172 253 211

CM10-16 321 484 403 1820 2650 2208 170 253 211

CM10-17 330 475 396 1830 2664 2220 169 248 206

CM10-8 320 475 396 1900 2707 2256 187 265 221

CM10-9 324 468 390 1890 2693 2244 184 269 224

CM7-11 293 432 360 1940 2817 2347 195 281 234

CM7-12 292 422 352 1940 2794 2328 195 289 241

CM7-13 292 436 364 1950 2841 2368 193 287 239

CM7-14 293 422 352 1970 2772 2310 192 274 228

CM7-15 298 432 360 1970 2822 2352 195 284 236

CM7-16 302 441 367 1990 2831 2359 197 281 234

IJ13P 326 415 346 1440 2900 2417 128 278 232

PR15 257 444 370 930 2792 2327 64 268 223

PR8 220 484 403 760 2866 2388 49 282 235

SM10-16 254 382 318 600 850 708 13 28 23

SM10-17 249 374 312 580 835 696 11 28 23

SM10-18 240 346 288 540 763 636 8.3 24 20

SM1O-19 245 369 307 550 778 648 7.5 25 21

SM10-20 242 360 300 560 792 660 12 27 22

SM10-21 245 360 300 580 806 672 16 27 23

Tuesday, February 07, 2012 rage 1 01 z

tL~.

Sample Date

Analysis Date

2/14/2012

2/14/2012

Crow Butte ProjectMonitor Well Laboratory Report

Alkalinity Conductivity Chloride

Well ED (mg/L) Alk SCL Alk MCL (pmho/cm) Cond SCL Cond MCL (mgfL) Cl SCL Cl MCL

CMI1-12

CM11-13

CM11-14

CM11-15

CM11-16

CM11-17

CM11-18

CM11-19

CM6-10

CM6-9

CM8-1

CM8-2

CM8-3

CM8-4

CM8-5

CM8-6

CM8-7

CM8-8

CM8-9

CM9-10

CM9-11

CM9-8

CM9-9

IJ13P

SMII-1

295

297

301

297

300

301

303

.301

316

294

294

302

308

299

300

297

298

308

314

297

300

298

299

312

163

433

418

468

431

451

438

445

448

429

428

455

395

432

428

425

432

425

418

452

359

445

418

475

415

240

361

348

390

359

376

365

371

373

358

356

379

329

360

356

354

360

354

348

377

299

371

348

396

346

200

1840

1850

1850

1830

1820

1820

1840

1840

2010

1950

1950

1940

1960

1950

1930

1920

1920

1920

1900

1800

1830

1830

1830

1370

410

2794 2328

2722

3024

2765

2794

2837

2722

2779

2952

2866

3110

3125

3211

3125

3067

3067

3154

3211

3053

2390

2707

2952

2923

2900

605

2268

2520

2304

2328

2364

2268

2316

2460

2388

2592

2604

2676

2604

2556

2556

2628

2676

2544

1992

2256

2460

2436

2417

504

183

191

187

185

188

184

184

189

199

189

192

192

197

195

195

194

191

194

188

186

188

185

187

117

6.2

268

291

357

289

276

301

297

300

327

285

372

334

367

328

328

317

396

415

325

292

284

366

334

278

24

223

242

298

241

230

251

247

250

272

238

310

278

306

274

274

264

330

346

271

244

236

305

278

232

20

Wednesday, Febmaiy 15, 2012 Page 1 of 3Wednesday, Febmary 15, 2012 Page I of 3

Sample Date

Analysis Date

2/21/2012

2/21/2012

Crow Butte ProjectMonitor Well Laboratory Report

Alkalinity Conductivity Chloride

Well ID (mg/L) Alk SCL Alk MCL (pmho/cm) Cond SCL Cond MCI (mg/L) CI SCL Ci MCL

CM10-18

CM1O-19

CM1O-20

CM10-21

CM10-22

CM10-23

CM10-24

CM10-25

CM10-26

CM10-27

CM2-5

CM2-6

CM2-7

CM4-1

CM4-2

CM4-3

CM4-4

IJ13P

PR15

PR8

SM10-23

SM10-24

SM10-25

SM10-26

SM1O-27

353

325

320

322

322

324

324

319

335

312

347

303

304

307

310

309

305

297

260

217

243

230

226

246

284

518

475

464

468

469

475

454

461

461

449

490

432

436

435

419

446

433

415

444

484

360

346

331

360

403

432

396

386

390

391

396

378

384

384

374

408

360

364

362

349

372

361

346

370

403

300

288

276

300

336

1780

1820

1850

1870

1870

1870

1860

1860

1950

1870

2170

1890

1890

1870

1930

1910

1880

1310

890

700

570

550

550

590

650

2650

2678

2678

2693

2693

2750

2707

2779

2664

2707

3394

3145

3059

2850

2951

3211

3002

2900

2792

2866

792

778

792

821

878

2208

2232

2232

2244

2244

2292

2256

2316

2220

2256

2828

2621

2549

2375

2459

2676

2502

2417

2327

2388

660

648

660

684

732

179

171

174

176

178

177

181

178

191

182

226

190

189

189

197

192

190

112

57

40

13

11

12

15

8.2

275

253

253

259

253

275

259

287

253

265

384

295

287

251

291

379

310

278

268

282

28

25

27

29

25

229

211

211

216

211

229

216

239

211

221

320

246

239

209

242

316

258

232

223

235

23

21

23

24

21

Wednesday, February 22, 2012 Page I of 2

IJ13P

Chloride

30 -r-

250+-

200+

00

0 150o1-

.,*0 ; II

'ta 0 1 1 11

IPO ýSN '0LPA

t pd' -

vc&100+

50-

A iI I I I I I I

N 4ý NN NN>fN "V \ N',N \

Date

- Cl MCL -u- Chloride - Cl SCL i

Thursday, February 23, 2012

IJ13P

Conductivity

3250-

2750-

2250-

1750-

1250-

750-

id417

-VT'1 -0

0 w 0 7

250~ 1 i i i i i i i i i i ii i i i i I

NV N

Date

- Cond MCL -- m Conductivity -Cond SCLI

Thursday, February 23, 2012

IJ13P

Alkalinity

500-

450

400-

350-

250-

200-

150-

1 nn

NN N N N N N NN NNN> >NNN NN NN NN~ N

Date

- Alk MCL --a--Alkalinity - Alk SCL

Thursday, February 23, 2012