CAMECO RESOURCESCROW BUTTE OPERATION

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

April 5, 2011

CERTIFIED MAILRETURN RECEIPT REQUESTED

Mr. Keith I McConnell, 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 Mr. McConnell:

On December 26, 2002 during routine biweekly water sampling of monitor well IJ-13P, the multipleparameter upper control limit (UCL) was exceeded for alkalinity and sulfate. As required by LicenseCondition 11.2 of Source Materials License SUA-1534, a second sample was collected within 48 hoursand analyzed for the five excursion indicator parameters. Although the results of the second sample weregenerally lower, two of the five excursion indicators continued to exceed the appropriate UCLs. Basedupon these results, IJ-13P was placed on excursion status. In accordance with License Condition 11.2,CBO increased the sampling frequency for IJ-13P to weekly.

By letter dated September 29, 2003, Source Materials License SUA-1534, Condition 11.2 was amendedremoving sodium and sulfate as excursion indicator parameters. It was determined that the threeparameters, alkalinity, chloride, and conductivity were sufficient to detect well field excursions and thelicense was amended accordingly.

Weekly samples were obtained from December 26,2002 to March 29,2011. The samples collected onFebruary 1, 8, 15, and 22, 2011; and March 1, 8, 15, 22, and 29, 2011 were below the excursion criteria

CROW BUTTE RESOURCES, INC.

Mr. Keith McConnellApril 5, 2011Page 2

as stated in License Condition 11.2. You will note that CBO did not remove the well from excursionstatus on March 8, 2011, even though six consecutive weekly samples had been below the excursionparameters. Due to a steady upward trend in alkalinity, CBO continued to sample the well until the trendwas reversed. Based on these results, CBO is removing IJ-13P from excursion status and is returning itto routine biweekly sampling. Attached are copies of the analytical data for each of the last six weeklysamples and graphs for each parameter covering the period of November 16, 2010 to March 29, 2011.

You will note that water level data is not available for this well for the sampling events that haveoccurred since February 1, 2011. With permission from NDEQ, this well was connected to therestoration circuit and allowed to run continuously, thus making it difficult to collect meaningful waterlevel data.

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 TeahonSHEQ Manager

Enclosures: As Stated

cc: Mr. Ronald Burrows - NRCCBO File

ec: CR - Cheyenne

7.t

Sample Date

Analysis Date

4-,

2/22/2011

2/22/2011

Crow Butte ProjectMonitor Well Laboratory Report

Alkalinity Conductivity ChlorideWell ID (mg/L) Alk SCL Alk MCL Qtmho/cm) Cond SCL Cond MCL (mg/L) CI SCL Cl MCL

CM1O-18

CM10-19

CM1O-20

CM1O-21

CM10-22

CM10-23

CM1O-24

CM10-25

CM10-26

CM10-27

CM2-5

CM2-6

CM2-7

CM4-1

CM4-2

CM4-3

CM4-4

IJ13P

PRI5

PR8

SM10-23

SM10-24

SM10-25

SM10-26

SM1O-27

354

325

322

324

321

323

326

315

316

315

314

304

307

314

310

308

302

399

384

229

241

234

229

250

285

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

1790

1830

1850

1860

1860

1860

1860

1860

1870

1870

1950

1880

1890

1900

1900

1900

1880

1880

1590

910

570

540

550

580

630

2650 2208

2678

2678

2693

2693

2750

2707

2779

2664

2707

3394

3145

3059

2850

2951

3211

3002

2900

2792

2866

792

778

792

821

878

2232

2232

2244

2244

2292

2256

2316

2220

2256

2828

2621

2549

2375

2459

2676

2502

2417

2327

2388

660

648

660

684

732

170

171

174

176

179

175

178

179

181

180

197

186

186

189

194

190

188

177

124

64

12

8

10

12

7.1

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 23, 2011 Page 1 of 2

WLAD

Sample Date 3/1/2011 Crow Butte ProjectAnalysis Date 3/1/2011 Monitor Well Laboratory Report

Alkalinity Conductivity Chloride

Well ID (mg/L) Alk SCL Alk MCL (pmho/cm) Cond SCL Cond MCLj (mg/L) C! SCL CI MCL

CM11-12 300 433 361 1850 2794 2328 183 268 223

CM11-13 299 418 348 1860 2722 2268 194 291 242

CM11-14 308 468 390 1880 3024 2520 194 357 298

CM11-15 300 431 359 1840 2765 2304 186 289 241

CM11-16 302 451 376 1820 2794 2328 187 276 230

CMl1-17 301 438 365 1820 2837 2364 184 301 251

CM11-18 305 445 371 1830 2722 2268 185 297 247

CM11-19 304 448 373 1840 2779 2316 186 300 250

CM6-10 304 429 358 1970 2952 2460 198 327 272

CM6-9 288 428 356 1940 2866 2388 189 285 238

CM8-1 293 455 379 1960 3110 2592 192 372 310

CM8-2 298 395 329 1950 3125 2604 193 334 278

CM8-3 290 432 360 1940 3211 2676 193 367 306

CM8-4 294 428 356 1930 3125 2604 196 328 274

CM8-5 284 425 354 1920 3067 2556 194 328 274

CM8-6 295 432 360 1930 3067 2556 193 317 264

CM8-7 309 425 354 1930 3154 2628 194 396 330

CM8-8 338 418 348 2030 3211 2676 207 415 346

CM8-9 313 452 377 1890 3053 2544 189 325 271

CM9-10 301 359 299 1830 2390 1992 188 292 244

CM9-11 301 445 371 1840 2707 2256 187 284 236

CM9-8 299 418 348 1820 2952 2460 186 366 305

CM9-9 303 475 396 1820 2923 2436 185 334 278

IJ13P 402 415 346 1910 2900 2417 177 278 232

SM11-1 167 240 200 420 605 504 4.7 24 20

Wednesday, March 02, 2011 Page 1 of3

Wednesday, March 02, 2011 Pagel1 of 3

toA)

Sample Date

Analysis Date

3/8/2011

3/8/2011

Crow Butte ProjectMonitor Well Laboratory Report

Alkalinity Conductivity Chloride

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

CM10-10

CM1O-11

CMIO-12

CM10-13

CM1O-14

CM1O-15

CM1O-16

CM1O-17

CM10-8

CM10-9

CM7-11

CM7-12

CM7-13

CM7-14

CM7-15

CM7-16

IJ13P

PR15

PR8

SM10-16

SM10-17

SM10-18

SM1O-19

SM10-20

SM10-21

317

313

316

319

332

338

324

331

329

311

295

292

291

295

296

304

409

378

224

253

248

238

244

243

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

1860

1860

1860

1830

1780

1720

1810

1820

1920

1860

1930

1940

1940

1970

1960

2000

1950

1560

870

590

580

540

550

560

580

2736 2280

2808

2923

2779

2578

2491

2650

2664

2707

2693

2817

2794

2841

2772

2822

2831

2900

2792

2866

850

835

763

778

792

806

2340

2436

2316

2148

2076

2208

2220

2256

2244

2347

2328

2368

2310

2352

2359

2417

2327

2388

708

696

636

648

660

672

182

178

176

175

170

173

169

169

191

181

192

192

192

192

195

199

183

123

61

11

11

7.5

6.7

11

15

275

288

327

287

251

253

253

248

265

269

281

289

287

274

284

281

278

268

282

28

28

24

25

27

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

23

Tuesday, March 08, 2011 Page 1 of 2

L~G~

Sample Date

Analysis Date

3/15/2011

3/15/2011

Crow Butte ProjectMonitor Well Laboratory Report

Alkalinity Conductivity ChlorideWell ID (mg/L) Alk SCL Alk MCL (gmho/cm) Cond SCL Cond MCL (mg/L) CI SCL Cl MCL

CM11-12

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

SMl1-1

301

300

308

298

301

299

304

303

305

290

295

300

290

295

285

295

310

483

310

302

302

299

303

400

166

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

1860

1880

1840

1820

1810

1830

1840

1980

1940

1960

1940

1940

1930

1910

1910

1910

2530

1870

1830

1830

1820

1820

1880

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

183

193

195

186

187

187

186

186

199

190

191

194

195

196

195

192

192

258

185

189

188

190

188

173

5.3

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

Tuesday, March 15, 2011 Page 1 of 3

Sample Date 3/22/2011 Crow Butte ProjectAnalysis Date 3/22/2011 Monitor Well Laboratory Report

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

CM1O-10 319 475 396 1850 2736 2280 184 275 229

CM1O-11 317 481 401 1850 2808 2340 182 288 240

CM1O-12 322 446 372 1850 2923 2436 179 327 272

CM1O-13 324 481 401 1830 2779 2316 179 287 239

CMIO-14 335 490 408 1780 2578 2148 175 251 209

CM10-15 343 504 420 1720 2491 2076 174 253 211

CM1O-16 329 484 403 1800 2650 2208 172 253 211

CM10-17 332 475 396 1820 2664 2220 172 248 206

CM10-8 347 475 396 1980 2707 2256 201 265 221

CM10-9 315 468 390 1850 2693 2244 182 269 224

CM7-11 295 432 360 1930 2817 2347 195 281 234

CM7-12 294 422 352 1940 2794 2328 194 289 241

CM7-13 293 436 364 1940 2841 2368 195 287 239

CM7-14 293 422 352 1960 2772 2310 193 274 228

CM7-15 299 432 360 1960 2822 2352 196 284 236

CM7-16 305 441 367 2000 2831 2359 202 281 234

CM8-8 520 418 348 2660 3211 2676 275 415 346

IJ13P 397 415 346 1850 2900 2417 168 278 232

PR15 372 444 370 1500 2792 2327 116 268 223

PR8 217 484 403 800 2866 2388 54 282 235

SM10-16 253 382 318 590 850 708 12 28 23

SM1O-17 247 374 312 570 835 696 11 28 23

SM10-18 238 346 288 540 763 636 7.9 24 20

SM10-19 245 369 307 550 778 648 6.9 25 21

SMIO-20 242 360 300 560 792 660 11 27 22

Tuesday, March 22, 2011 D I PI)age o

i-O)-U

Sample Date 3/29/2011 Crow Butte ProjectAnalysis Date 3/30/2011 Monitor Well Laboratory Report

Alkalinity Conductivity Chloride

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

CM11-12 297 433 361 1850 2794 2328 187 268 223

CM11-13 299 418 348 1850 2722 2268 194 291 242

CM11-14 308 468 390 1870 3024 2520 195 357 298

CM11-15 299 431 359 1830 2765 2304 190 289 241

CM11-16 303 451 376 1820 2794 2328 189 276 230

CM11-17 301 438 365 1820 2837 2364 191 301 251

CM11-18 304 445 371 1830 2722 2268 190 297 247

CM11-19 303 448 373 1850 2779 2316 192 300 250

CM6-10 309 429 358 1980 2952 2460 197 327 272

CM6-9 289 428 356 1940 2866 2388 188 285 238

CM8-1 296 455 379 1950 3110 2592 190 372 310

CM8-2 302 395 329 1940 3125 2604 191 334 278

CM8-3 297 432 360 1930 3211 2676 191 367 306

CM8-4 295 428 356 1930 3125 2604 191 328 274

CM8-5 294 425 354 1920 3067 2556 192 328 274

CM8-6 296 432 360 1920 3067 2556 191 317 264

CM8-7 304 425 354 1900 3154 2628 190 396 330

C(M8-8 515 418 348 2630 3211 2676 269 415 346

CM8-9 311 452 377 1870 3053 2544 185 325 271

CM9-10 305 359 299 1850 2390 1992 194 292 244

CM9-11 299 445 371 1830 2707 2256 191 284 236

CM9-8 297 418 348 1820 2952 2460 191 366 305

CM9-9 302 475 396 1830 2923 2436 190 334 278

IJ13P 388 415 346 1790 2900 2417 163 278 232

SM1l-1 166 240 200 420 605 504 5.8 24 20

Wednesday, March 30, 2011 n 1 •age I of 3

IJ13P

Alkalinity

500-

450-

400-

350-

*j 300-

250-

200-

150-

100

4

Date

- Alk MCL -rn--Alkalinity - Alk SCL I

Tuesday, Apnl 05,2011

IJ13P

Conductivity

3250-

2750-

2250-

1750-

1250-

750-

6 b po o0 PO9

0

N~ N) N> N> N N>N> N ~ N N> > N

9-tn

Date

- Cond MCL -i-- Conductivity - Cond SCL

Tuesday, April 05, 2011

IJ13P

Chloride

300-

250-

200-

"0V2o 150-

100-

50-

"ri

o 71-0

n.

Ný NZ lý NZ ý NZ lý N 11 NN NN N> N N> N NN N N

Ný Z'- p A ef bp Z$ 14r 41P ' 41V

Date

- CI MCL -- m- Chlodde - CI SCLI

Tuesday, Apdl 05, 2011

IJ13P

Water Level

190

195

200

205 206

" 210

215

U 220

225 -

230 -

235240 . ... % , ,% , ,

4'I41 N4 NIPNDate

-- Water Level - AogOfWater Lewel

Tuesday, April 05, 2011