Text

Cimarron Corporation 1999 Final Status Survey Report for Sub-Area I, Part 7 of 7
	ML20212L571
Person / Time
Site:	07000925
Issue date:	06/29/1999
From:	; Cimarron Corp
To:	; Office of Nuclear Material Safety and Safeguards
Shared Package
ML20212L572	List: ML20212L527; ML20212L541; ML20212L543; ML20212L552; ML20212L556; ML20212L561; ML20212L571;
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06/16/99 CIMARRON CORPORATION - CIMARRON FACILITY ALPHA DIRECT TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA " I" EMERGENCY BUILDING INTERIOR WALLS SURVEY (UNAFFECTED) n = DPM /1 OOcm2

Number 251 252 253 254 255 256 n

0.0 0.0 9.0 9.0 9.0 0.0 (n-N)

-9.3

-0.3

-9.3 (n-N) 2 86.88 86.88 0.10 0.10 0.10 86.88 Number 301 302 303 304 305 306 n

0.0 0.0 0.0 0.0 45.0 18.0 (n-N)

-9.3

-9.3 35.7 8.7 (n-N) 2 86.88 86.88 86.88 86.88 1273.01 75.33 257 0 .0 -9.3 86.88 307 0.0 -9.3 86.88 258 0.0 -9.3 86.88 308 36.0 26.7 711.78 259 0.0 -9.3 86.88 309 0 .0 -9.3 86.88 260 9.0 -0.3 0.10 310 0.0 -9.3 86.88 261 9.0 -0.3 0.10 311 18.0 8.7 75.33 262 9.0 -0.3 0.10 312 0.0 -9.3 86.88 263 18.0 8.7 75.33 313 0.0 -9.3 86.88 264 9.0 -0.3 0.10 314 0.0 -9.3 86.88 265 27.0 17.7 312.55 315 0.0 -9.3 86.88 266 9.0 -0.3 0.10 316 0.0 -9.3 86.88 267 0.0 -9.3 86.88 317 0.0 -9.3 86.88 268 18.0 8.7 75.33 318 9.0 -0.3 0.10 269 0.0 -9.3 86.88 319 45.0 35.7 1273.01 270 0.0 -9.3 86.88 320 0 .0 -9.3 86.88 271 9.0 -0.3 0.10 321 0.0 -9.3 86.88 272 27.0 17.7 312.55 322 27.0 17.7 312.55 273 9.0 -0.3 0.10 323 36.0 26.7 711.78 274 18.0 8.7 75.33 324 18.0 8.7 75.33 275 0.0 -9.3 86.88 325 9.0 -0.3 0.10 276 18.0 8.7 75.33 326 0.0 -9.3 86.88 277 0.0 *9.3 86.88 327 18.0 8.7 75.33 278 9.0 -0.3 0.10 328 36.0 26.7 711.78 279 0.0 -9.3 86.88 329 27.0 17.7 312.55 280 0.0 -9.3 86.88 330 0.0 -9.3 86.88 281 9.0 -0.3 0.10 331 9.0 -0.3 0.10 282 9.0 --0.3 0.10 332 9.0 -0.3 0.10 283 0.0 -9.3 86.88 333 18.0 8.7 75.33 284 18.0 8.7 75.33 334 9.0 -0.3 0.10 285 0.0 -9.3 86.88 335 18.0 8.7 75.33 286 0.0 -9.3 86.88 336 18.0 8.7 75.33 287 18.0 8.7 75.33 337 36.0 26.7 711.78 288 0.0 -9.3 86.88 338 27.0 17.7 312.55 289 0.0 *9.3 86.88 339 0.0 -9.3 86.88 290 72.0 62.7 3928.68 340 9.0 -0.3 0.10 291 27.0 17.7 312.55 341 9.0 -0.3 0.10 292 0.0 -9.3 86.88 342 18.0 8.7 75.33 293 0.0 -9.3 86.88 343 18.0 8.7 75.33 294 0.0 -9.3 86.88 344 18.0 8.7 75.33 295 18.0 8.7 75.33 345 18.0 8.7 75.33 296 0.0 -9.3 86.88 346 18.0 8.7 75.33 297 36.0 26.7 711.78 347 18.0 8.7 75.33 298 0.0 -9.3 86.88 348 36.0 26.7 711.78 299 0.0 -9.3 86.88 349 0.0 *9.3 86.88 300 0.0 -9.3 86.88 350 36.0 26.7 711.78

432.0 Sum(n) 8278.7 Sum(n-N}2 684.0 Sum(n)

PAGE 4 OF 5 10385.0 Sum(n-N}2 C:\OFFICE\AREA\I\EMERBULD\INTERACM.WB2

06/16/99 CIMARRON CORPORATION - CIMARRON FACILITY ALPHA DIRECT TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA 11 I 11 EMERGENCY BUILDING INTERIOR WALLS SURVEY (UNAFFECTED) n = DPM /1 OOcm 2

Number n (n-N ) (n-N)2 Number n (n-N) (n-N)-1 351 45.0 35.7 1273.01 401 0.0 0.00 0.00 352 27.0 17.7 312.55 402 0.0 0.00 0.00 353 27.0 17.7 312.55 403 0.0 0.00 0.00 354 0.0 -9.3 86.88 404 0.0 0.00 0.00 355 18.0 8.7 75.33

405 0.0 0.00 0.00 356 27.0 17.7 312.55 ' 406 0.0 0.00 0.00 357 9.0 -0.3 0.10 407 0.0 0.00 0.00 358 36.0 26.7 711 .78 408 0.0 0.00 0.00 359 0.0 -9.3 86.88 409 0.0 0.00 0.00 360 0.0 -9.3 86.88 410 0.0 0.00 0.00 361 18.0 8.7 75.33 411 0.0 0.00 0.00 362 0.0 -9.3 86.88 412 0.0 0.00 0.00 363 9.0 -0.3 0.10 413 0.0 0.00 0.00 364 27.0 17.7 312.55 414 0.0 0.00 0.00 365 36 .0 26.7 711.78 415 0.0 0.00 0.00 366 0.0 -9.3 86.88 416 0 .0 0.00 0.00 367 0.0 -9.3 86.88 417 0.0 0.00 0.00 368 27.0 17.7 312.55 418 0.0 0.00 0.00 369 54.0 44.7 1996.23 419 0 .0 0.00 0.00 370 9.0 -0.3 0.10 420 0.0 0.00 0.00 371 9.0 -0.3 0.10 421 0.0 0.00 0.00 372 9 .0 -0.3 0.10 422 0.0 0.00 0.00 373 9.0 -0.3 0.10 423 0.0 0.00 0.00 374 0.0 -9.3 86.88 424 0.0 0.00 0.00 375 27.0 17.7 312.55 425 0.0 0.00 0.00 376 18 .0 8.7 75.33 426 0.0 0.00 0.00 377 0.0 -9.3 86.88 427 0.0 0.00 0.00 378 27.0 17.7 312.55 428 0.0 0.00 0.00 379 0.0 -9.3 86.88 429 0.0 0.00 0.00 380 0.0 -9.3 86.88 430 0.0 0.00 0.00 381 0.0 -9.3 86.88 431 0.0 0.00 0.00 382 0.0 -9.3 86.88 432 0.0 0.00 0.00 383 0.0 -9.3 86.88 433 0.0 0.00 0.00 384 0.0 -9.3 86.88 434 0.0 0.00 0.00 385 0.0 -9.3 86.88 435 0.0 0.00 0.00 386 0.0 -9.3 86.88 436 0.0 0.00 0.00 387 0.0 -9.3 86.88 437 0.0 0.00 0.00 388 0.0 -9.3 86.88 438 0.0 0.00 0.00 389 0.0 -9.3 86.88 439 0.0 0.00 0.00 390 0.0 -9.3 86.88 440 0.0 0.00 0.00 391 0.0 -9.3 86.88 441 0.0 0.00 0.00 392 9.0 -0.3 0.10 442 0.0 0.00 0.00 393 27.0 17.7 312.55 443 0.0 0.00 0.00 394 9.0 -0.3 0.10 444 0.0 0.00 0.00 395 18.0 8.7 75.33 445 0.0 0.00 0.00 396 0.0 -9.3 86.88 446 0.0 0.00 0.00 397 9.0 -0.3 0.10 447 0.0 0.00 0.00 398 0.0 -9.3 86.88 448 0.0 0.00 0.00 399 9.0 -0.3 0.10 449 0.0 0.00 0.00 400 0.0 0.00 0.00 450 0.0 0.00 0.00 549.0 9493.7 0.0 0.0 Sum(n) Sum(n-N) 2 Sum(n) Sum(n*N) 2 PAGE 5 OF 5 C:\OFFICE\AREA\I\EMERBULD\INTERACM.WB2

06/16199 CIMARRON CORPORATION - CIMARRON FACILITY BETA DIRECT TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95o/* CONFIDENCE AREA *x EMERGENCY BUILDING INTERIOR WALLS SURVEY (UNAFFECTED) n = DPM /1 OOcm2 Number n (n-N} (n-N)' No. of Sampfes (x): 399 1 0.0 -9.4 88.7 2 0 .0 -9.4 88.7 COUNT TIME: 0.5 MINUTES 3 0 .0 -9.4 88.7 4 0.0 -9.4 88.7 Sample Mean (N) z Sum(nl *~(_x}~~-~

5 0.0 -9.4 88.7 Sample Meah (N) : j 9.42 6 0.0 -9.4 88.7 7 0.0 -9.4 88.7 8 0.0 -9.4 88.7 9 0.0 -9.4 88.7 10 0.0 -9.-4 88.7 Standard DeYlation (Sd)

SQRT [(n-N}' + (X - 1))

11 0.0 -9.4 88.7 12 0.0 -9.-4 88.7 13 O,D -9.4 88.7 Standard Deviation: 27.94 14 0.0 -9.4 88.7 2 Std Deviations: 55.88 15 0.0 -9.4 88.7 Degree of Freedom(df).= (x) - 1 Data listed on Table B-1 16 0.0 -9.4 88.7 (df) = I 1.649 17 0.0 -9.4 88.7 18 0.0 -9.4 88.7 Area's Average Lev*I (Aµ)= (N) + (df) x [(Sd)/SQRT(x))

19 0.0 -9.4 88.7 00 20 0.0 -9.4 88.7 (Aµ)= DPM /100cm~

21 0.0 -9.4 88.7 GUIOEUNf VALUE: DPM /100cm 2 22 0.0 -9.4 88.7 Acceptable Level: DPM /100cm 2 23 0.0 -9.4 88.7 24 0.0 -9.4 88.7 25 0.0 -9.4 88.7 TABLE B -1 26 0.0 -9.-4 88.7 Factors for Comparision of Survey Data with Guidelines 27 0.0 -9.-4 88.7 ((ff) 95% 97.5',I, (df) 95*,1, 97.5%

28 0.0 -9.-4 88.7 1 6.314 12.706 19 1.729 2.093 29 0.0 -9.4 88.7 2 2.92 4.303 20 1.725 2.086 30 0 .0 -9.4 88.7 3 2.353 3.182 21 1.721 2.08 31 0 .0 -9.4 88.7 4 2.132 2.776 22 1.717 2.074 32 0.0 -9.4 88.7 5 2.015 2.571 23 1.714 2.069 33 0.0 -9.4 88.7 6 1.943 2.447 24 1.711 2.064 3-4 170.0 160.6 25786.4 7 1.895 2.365 25 1.708 2.06 35 120.0 110.6 12228.3 8 1.86 2.306 26 1.706 2.056 36 0.0 -9.4 88.7 9 1.833 2.262 27 1.703 2.052 37 0.0 -9.4 88.7 10 1.812 2.228 28 1.701 2.048 38 80.0 70.6 4981.7 11 1.796 2.201 29 1.699 2.045 39 120.0 110.6 12228.3 12 1.782 2.179 30 1.697 2.042

-40 0.0 -9.4 88.7 13 1.771 2.16 40 1.684 2.021 41 150.0 140.6 19763.1 14 1.761 2.145 60 1.671 2 42 50.0 4D.6 1646.9 15 1.753 2.131 120 1.658 1.98 43 0.0 -9.4 88.7 16 1.746 2.12 400 1.649 1.966 44 30.0 20.6 423.6 17 1.74 2.11 Infinite 1.645 1.96 45 0.0 -9.4 88.7 18 1.734 2.101 46 0.0 -9.4 88.7 47 0.0 *9.4 88.7 48 0.0 -9.4 88.7 For valun of Degrees of Freedom not list&d:

49 0.0 -9.4 88.7 lnt*rpolate between the llste~d_v_al_u_&S_.- ~ - -- ~ - - ~- - ~

50 0.0 -9.4 88.7 (df) high value(Z) 400 is (B) 1.649 PAGE2 200.0 14068.0 (di) low valt1e{Y) 120 Is (A) 1.658 PAGE2 0.0 4435.5 Desin,d valult(df) (X) 398 is calculated as follow:

PAGE3 127.0 18172.1 I .:....(X_-Y..,_J~*~L_n(:...A-'--')] : . , . . . - - - - ~ - ~

EXP[( (Ln(B)-Ln(A)) + (Z*Y) ....

PAGE3 281.0 56863.2 The (df) value for (X) ! 398 I U49 95%

PAGE4 2430.0 56863.2 PAGE4 PAGE5 o.o 0.0 4435.5 18172.1 PERFORMED BY:J) ti~~ DATE:

PAGES 0.0 56863.2 REVIEWED BY: 1J. u_

try~ DATE:

total 3758 Sum(nl 310745.6 Sum(n-N)' PAGE 1 OF 5 C;\OFFICE\AREA\JIEMERBULD\INTERBCM.W02

06/16/99 CIMARRON CORPORATION -CIMARRON FACILITY BETA DIRECT TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA AREA nI 11 EMERGENCY BUILDING INTERIOR WALLS SURVEY (UNAFFECTED) n = DPM /100cm 2 Number n (n-N) (n-N) 2 Number n (n-N) fn-Nl 2 51 0.0 -9.4 88.71 101 0.0 -9.4 88.71 52 100.0 90.6 8205.00 102 0.0 -9.4 88.71 53 10.0 0.6 0.34 103 0.0 -9.4 88.71 54 0.0 -9.4 88.71 104 0.0 -9.4 88.71 55 0.0 -9.4 88.71 105 0.0 -9.4 88.71 56 0.0 -9.4 88.71 106 0.0 -9.4 88.71 57 0.0 -9.4 88.71 107 0.0 -9.4 88.71 58 10.0 0.6 0.34 108 0.0 -9.4 88.71 59 40.0 30.6 935.23 109 0.0 -9.4 88.71 60 0.0 -9.4 88.71 110 0.0 -9.4 88.71 61 0.0 -9.4 88.71 111 0.0 -9.4 88.71 62 0.0 -9.4 88.71 112 0.0 -9.4 88.71 63 40.0 30.6 935.23 113 0.0 -9.4 88.71 64 0.0 -9.4 88.71 114 0.0 -9.4 88.71 65 0.0 -9.4 88.71 115 0.0 -9.4 88.71 66 0.0 -9.4 88.71 116 0.0 -9.4 88.71 67 0.0 -9.4 88.71 117 0.0 -9.4 88.71 68 0.0 -9.4 88.71 118 0.0 -9.4 88.71 69 0 .0 -9.4 88.71 119 0.0 -9.4 88.71 70 0.0 -9.4 88.71 120 0.0 -9.4 88.71 71 0 .0 -9.4 88.71 121 0.0 -9.4 88.71 72 0.0 -9.4 88.71 122 0.0 -9.4 88.71 73 0.0 -9.4 88.71 123 0.0 -9.4 88.71 74 0.0 -9.4 88.71 124 0.0 -9.4 88.71 75 0.0 -9.4 88.71 125 0,0 -9.4 88.71 76 0.0 -9.4 88.71 126 0,0 -9.4 88.71 77 0.0 -9.4 88.71 127 0.0 -9.4 88.71 78 0.0 -9.4 88.71 128 0.0 -9.4 88.71 79 0 .0 -9.4 88.71 129 0.0 -9.4 88.71 80 0.0 -9.4 88.71 130 0.0 -9.4 88.71 81 0.0 -9.4 88.71 131 0.0 -9.4 88.71 82 0.0 -9.4 88.71 132 0.0 -9.4 88.71 83 0.0 -9.4 88.71 133 0.0 -9.4 88.71 84 0.0 -9.4 88.71 134 0.0 -9.4 88.71 85 0.0 -9.4 88.71 135 0.0 -9.4 88.71 86 0.0 -9.4 88.71 136 0.0 -9.4 88.71 87 0.0 -9.4 88.71 137 0.0 -9.4 88.71 88 0 .0 -9.4 88.71 138 0.0 -9.4 88.71 89 0.0 -9.4 88.71 139 0.0 -9.4 88.71 90 0.0 -9.4 88.71 140 0.0 -9.4 88.71 91 0.0 -9.4 88.71 141 0.0 -9.4 88.71 92 0.0 -9.4 88.71 142 0.0 -9.4 88.71 93 0.0 -9.4 88.71 143 0.0 -9.4 88.71 94 0.0 -9.4 88.71 144 0.0 -9.4 88.71 95 0.0 -9.4 88.71 145 0.0 -9.4 88.71 96 0.0 -9.4 88.71 146 0.0 -9.4 88.71 97 0.0 -9.4 88.71 147 0.0 -9.4 88.71 98 0.0 -9.4 88.71 148 0.0 -9.4 88.71 99 0.0 -9.4 88.71 149 0.0 -9.4 88.71 100 0.0 -9.4 88.71 150 0.0 -9.4 88.71 200.0 14068.0 0.0 4435.5 Sum(n) Sum(n-N)2 Sum(n} Sum{n-N)1 PAGE 2 OF 5 C:\OFFlCE\AREA\I\EMERBULD\INTERBCM.WB2

06/16/99 CIMARRON CORPORATION - CIMARRON FACILITY BETA DIRECT TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA "I" EMERGENCY BUILDING INTERIOR WALLS SURVEY (UNAFFECTED) n = DPM /100cm 2 Number n (n-N) (n-N) 2 Number n (n-N) {n-N) 2 151 0 .0 -9.4 88.71 201 0.0 -9.4 88.71 152 0.0 -9.4 88.71 202 236.0 226.6 51339.16 153 0.0 -9.4 88.71 203 0.0 -9.4 88.71 154 0.0 -9.4 88.71 204 0.0 -9.4 88.71 155 0.0 -9.4 88.71 205 0.0 -9.4 88.71 156 0.0 -9.4 88.71 206 0.0 -9.4 88.71 157 0,0 *9.4 88.71 207 0.0 -9.4 88.71 158 0.0 -9.4 88.71 208 0.0 -9.4 88.71 159 0.0 -9.4 88.71 209 0.0 -9.4 88.71 160 0.0 -9.4 88.71 210 0.0 -9.4 88.71 161 0.0 -9.4 88.71 211 0.0 -9.4 88.71 162 0.0 -9.4 88.71 212 0.0 -9.4 88.71 163 0.0 -9.4 88.71 213 0.0 -9.4 88.71 164 0 .0 -9.4 88.71 214 0.0 -9.4 88.71 165 0.0 -9.4 88.71 215 0.0 -9.4 88.71 166 0.0 -9.4 88.71 216 0.0 -9.4 88.71 167 0.0 -9.4 88.71 217 0.0 -9.4 88.71 168 0 ,0 -9.4 88.71 218 0.0 -9.4 88.71 169 0.0 -9.4 88.71 219 0.0 -9.4 88.71 170 0 ,0 -9.4 88.71 220 0.0 -9.4 88.71 171 0 .0 -9.4 88.71 221 0.0 -9.4 88.71 172 0.0 -9.4 88.71 222 0.0 -9.4 88.71 173 0.0 -9.4 88.71 223 0.0 -9.4 88.71 174 0.0 -9.4 88.71 224 0.0 -9.4 88.71 175 0.0 -9.4 88.71 225 0.0 -9.4 88.71 176 0.0 -9.4 88.71 226 0.0 -9.4 88.71 177 0.0 -9.4 88.71 227 0.0 -9.4 88.71 178 0.0 -9.4 88.71 228 0.0 -9.4 88.71 179 0.0 -9.4 88.71 229 0.0 -9.4 88.71 180 0.0 -9.4 88.71 230 0.0 -9.4 88.71 181 0,0 -9.4 88.71 231 0.0 -9.4 88.71 182 0.0 -9.4 88.71 232 0.0 -9.4 88.71 183 0.0 -9.4 88.71 233 0.0 -9.4 88.71 184 0.0 -9.4 88.71 234 0.0 -9.4 88.71 185 0.0 -9.4 88.71 235 0.0 -9.4 88.71 186 0.0 -9.4 88.71 236 0.0 -9.4 88.71 187 0.0 -9.4 88.71 237 0 .0 -9.4 88.71 188 0.0 -9.4 88.71 238 0.0 -9.4 88.71 189 0.0 -9.4 88.71 239 0.0 -9.4 88.71 190 0.0 -9.4 88.71 240 45,0 35.6 1266.04 191 0.0 -9.4 88.71 241 0.0 -9.4 88.71 192 0.0 -9.4 88.71 242 0.0 -9.4 88.71 193 0.0 -9.4 88.71 243 0.0 -9.4 88.71 194 0.0 -9.4 88.71 244 0.0 -9.4 88.71 195 0.0 -9.4 88.71 245 0.0 -9.4 88.71 196 0.0 -9.4 88.71 246 0.0 -9.4 88.71 197 0.0 -9.4 88.71 247 0.0 -9.4 88.71 198 0.0 -9.4 88.71 248 0.0 -9.4 88.71 199 0.0 -9.4 88.71 249 0.0 -9.4 88.71 200 127.0 117.6 13825.40 250 0.0 -9.4 88.71 127.0 18172.1 281.0 56863.2 Sum(n) Sum(n-N) 2 Sum(n) Sum(n-N) 2 PAGE 3 OF 5 C:\OFFICE\AREA\I\EMERBULO\INTERBCM.WB2

06/16/99 CIMARRON CORPORATION -CIMARRON FACILITY BETA DIRECT TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA nin EMERGENCY BUILDING INTERIOR WALLS SURVEY (UNAFFECTED) n = DPM /1 OOcm 2 Number n (n-N) (n-N)2 Number n (n-N) ln-N)i 251 0.0 -9.4 88.71 301 0.0 -9.4 88.71 252 0.0 -9.4 88.71 302 0.0 -9.4 88.71 253 0.0 -9.4 88.71 303 0.0 -9.4 88.71 254 0.0 -9.4 88.71 304 0.0 -9.4 88.71 255 0.0 -9.4 88.71 305 0.0 -9.4 88.71 256 0.0 -9.4 88.71 306 0.0 -9.4 88.71 257 0.0 -9.4 88.71 307 0.0 -9.4 88.71 258 0.0 -9.4 88.71 308 0.0 -9.4 88.71 259 0.0 -9.4 88.71 309 0.0 -9.4 88.71 260 135.0 125.6 15770.70 310 0.0 -9.4 88.71 261 360.0 350.6 122907.36 311 0.0 -9.4 88.71 262 135.0 125.6 15770.70 312 0.0 -9.4 88.71 263 180.0 170.6 29098.03 313 0.0 -9.4 88.71 264 234.0 224.6 50436.83 314 0.0 -9.4 88.71 265 306.0 296.6 87960.56 315 0.0 -9.4 88.71 266 216.0 206.6 42675.90 316 0.0 -9.4 88.71 267 279.0 269.6 72674.16 317 0.0 -9.4 88.71 268 171.0 161.6 26108.57 318 0.0 -9.4 88.71 269 378.0 368.6 135852.29 319 0.0 -9.4 88.71 270 0 .0 -9.4 88.71 320 0.0 -9.4 88.71 271 0.0 -9.4 88.71 321 0.0 -9.4 88.71 272 0.0 -9.4 88.71 322 0.0 -9.4 88.71 273 0.0 -9.4 88.71 323 0.0 -9.4 88.71 274 0 .0 -9.4 88.71 324 0.0 -9.4 88.71 275 0.0 -9.4 88.71 325 0.0 -9.4 88.71 276 0.0 -9.4 88.71 326 0.0 -9.4 88.71 277 0.0 -9.4 88.71 327 0.0 -9.4 88.71 278 0.0 -9.4 88.71 328 0.0 -9.4 88.71 279 0.0 -9.4 88.71 329 0.0 -9.4 88.71 280 0 .0 -9.4 88.71 330 0.0 -9.4 88.71 281 0.0 -9.4 88.71 331 0.0 -9.4 88.71 282 0.0 -9.4 88.71 332 0.0 -9.4 88.71 283 0 .0 -9.4 88.71 333 0.0 -9.4 88.71 284 0 .0 -9.4 88.71 334 0.0 -9.4 88.71 285 0.0 -9.4 88.71 335 0.0 -9.4 88.71 286 0.0 -9.4 88.71 336 0.0 -9.4 88.71 287 0.0 -9.4 88.71 337 0.0 -9.4 88.71 288 0.0 -9.4 88.71 338 0.0 -9.4 88.71 289 0.0 -9.4 88.71 339 0.0 -9.4 88.71 290 0.0 -9.4 88.71 340 0.0 -9.4 88.71 291 0.0 -9.4 88.71 341 0.0 -9.4 88.71 292 0.0 -9.4 88.71 342 0.0 -9.4 88.71 293 0.0 -9.4 88.71 343 0.0 -9.4 88.71 294 0.0 -9.4 88.71 344 0.0 -9.4 88.71 295 0.0 -9.4 88.71 345 0.0 -9.4 88.71 296 0.0 -9.4 88.71 346 0.0 -9.4 88.71 297 0.0 -9.4 88.71 347 0.0 -9.4 88.71 298 36.0 26.6 706.57 348 0.0 -9.4 88.71 299 0.0 -9.4 88.71 349 0.0 -9.4 88.71 300 0.0 -9.4 88.71 350 0.0 -9.4 88.71

2430.0 Sum(n) 603421.3 Sum(n-N) 2 0.0 Sum(n)

PAGE 4 OF 5 4435.5 Sum(n-N) 2 C:\OFFICE\AREA\I\EMERBULD\INTERBCM.WB2

06/16/99 CIMARRON CORPORATION - CIMARRON FACILITY BETA DIRECT TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA "I" EMERGENCY BUILDING INTERIOR WALLS SURVEY (UNAFFECTED) n = DPM /1 OOcm 2 Number n (n*N) (n-N)1 Number n (n-N) (n-N) 1 351 0.0 -9.4 88.71 401 0.0 0.00 0.00 352 0.0 -9.4 88.71 402 0.0 0.00 0.00 353 0.0 -9.4 88.71 403 0.0 0.00 0.00 354 0.0 -9.4 88.71 404 0.0 0.00 0.00 355 0 .0 -9.4 88.71 405 0.0 0.00 0.00 356 0.0 -9.4 88.71 406 0.0 0.00 0.0D 357 0.0 -9.4 88.71 407 0.0 0.00 0.00 358 0.0 -9.4 88.71 408 0 .0 0.00 0.00 359 0.0 -9.4 88.71 409 0.0 0.00 0.00 360 0 .0 -9.4 88.71 410 0.0 0.00 0.00 361 0.0 -9.4 88.71 411 0.0 0.00 0.00 362 0.0 -9.4 88.71 412 0.0 0.00 0.00 363 0.0 -9.4 88.71 413 0.0 0.00 0.00 364 0.0 -9.4 88.71 414 0.0 0.00 0.00 365 0 .0 -9.4 88.71 415 0.0 0.00 0.00 366 0.0 -9.4 88.71 416 0.0 0.00 0.00 367 0.0 -9.4 88.71 417 0.0 0.00 0.00 368 0 .0 -9.4 88.71 418 0.0 0.00 0.00 369 0 .0 -9.4 88.71 419 0.0 0.00 0.00 370 0.0 -9.4 88.71 420 0.0 0.00 0.00 371 0.0 -9.4 88.71 421 0.0 0.00 0.00 372 0.0 -9.4 88.71 422 0.0 0.00 0.00 423 373 0.0 -9.4 88.71 0.0 0.00 0.00 374 0.0 -9.4 88.71 424 0.0 0.00 0.00 375 0.0 -9.4 88.71 425 0.0 0.00 0.00 376 0.0 -9.4 88.71 426 0.0 0.00 0.00 377 0.0 -9.4 88.71 427 0.0 0.00 0.00 378 0.0 -9.4 88.71 428 0 .0 0.00 0.00 379 0.0 -9.4 88.71 429 0.0 0.00 0.00 380 0.0 -9.4 88.71 430 0.0 0.00 0.00 381 0.0 -9.4 88.71 431 0 .0 0.00 0.00 382 0 .0 -9.4 88.71 432 0.0 0.00 0.00 383 0 .0 -9.4 88.71 433 0.0 0.00 0.00 384 0.0 -9.4 88.71 434 0.0 0.00 0.00 385 D.O -9.4 88.71 435 0.0 0.00 0.00 386 0.0 -9.4 88.71 436 0.0 0.00 0.00 387 0.0 -9.4 88.71 437 0.0 0.00 0.00 388 0.0 -9.4 88.71 438 0.0 0.00 0.00 389 0.0 -9.4 88.71 439 0 ,0 0.00 0.00 390 0 .0 -9.4 88.71 440 0.0 0.00 0.00 391 0.0 -9.4 88.71 441 0 .0 0.00 0.00 392 0.0 -9.4 88.71 442 0.0 0.00 0.00 393 0.0 -9.4 88.71 443 0.0 0.00 0.00 394 0 .0 -9.4 88.71 444 0.0 0.00 0.00 395 0.0 -9.4 88.71 445 0.0 0.00 0.00 396 0.0 -9.4 88.71 446 0.0 0.00 0.00 397 0.0 -9.4 88.71 447 0.0 0.00 0.00 398 0.0 -9.4 88.71 448 0.0 0.00 0.00 399 0.0 -9.4 88.71 449 0 .0 0.00 0.00 400 0.0 0.00 0.00 450 0.0 0.00 0.00 0.0 4346.7 0.0 0.0 Sum(n} Sum(n-N)' Sum(n) Sum(n-N)*

PAGE50F 5 C:\OFF1CE\AREA\I\EMERBULD\/NTERBCM.VVB2

EAST WALL S. AIR LOCK N. AIR LOCK 2 3 4 5 6 7 WEST WALL N. AIR LOCK S, AIR LOCK 8 9 10 11 12 13 14 SOUTH WALL NORTH WALL 15 16 17 18---

NOTES:

REfER TO DATA TABLE FOR SURVEY RESULTS.

@ CIMARRON CORPORATION Cl MARRON FACILlTY PHASE II - SUB-AREA I 3 0 3 SURVEY PATTERN LOCATION EMERGENCY BUILDING EXTERIOR WALLS SCALE IN METERS 1--.-------------------i,--.......,.-_.---~

REV, OCSCRIPTION OO'MI 13)': CK'D BY: APP'[\ SY: D.l.11 OR'M'-1.

BY ,JE DATE:

5-23-99 SCALE:

AS SH OWN 0 I DRAWING ISSUED. JE I WR I JL 16/21/99 JOB NO. DRAWING NO.

99POSIEMS -15 Io*

... SUBAREAI\EMER-BLDG\EMER-EXl'ERIOR

WEST 30 20 21 22 19 23 24 SOUTH 25 26 27 NORTH 28 29 EAST

~

NOTES:

REFER TO DATA TABLE FOR SURVEY RESULTS.

CIMARRON CORPORATION CIMARRON FACILITY 3 0 3 PHASE II - SUB - AREA I I

SURVEY PATTERN LOCATION I

EMERGENCY BUILDING ROOF S C A L E I N METERS REV DESCRIPTION DR\OI SY: cK'o BY: .lW'D !?l': DAT£ OR°M'l.

BY JE DATT:

5 23 99 ISCALI:

AS SHOWN 0 DRAWING ISSUED. JE WR JL 6/21 /99 JOB NO. ORAWltlC NIJ.

99POSIEMS 16 lo*

.. .3UBAREAI\EMER-BL0G\EMER- ROOF

05/20/99 CIMARRON FACILITY EMERGENCY BUILDING SUB ARRA "I" ALPHA AND BETA/GAMMA UNAFFECTED PHASE 11 SIN RESULTS IN '~A-~!{G~OUNO MCA INSTRUMENTS:

ALPHA DIRECT LUDLUM 2220 68 PROBE 58308 DPM1100cm2 4cpm 84DPM BETA DIRECT LUDLUM 2220 68 PROBE 58309 DPM/100cm 2 276 cpm 502 DPM ALPHA- .3cpm 11 Cl..01 DPM/100cm2 DPM/100cm 2 ALPHA ANO BETA SMEAR TENNELEC LB-5100 BETA- 1.3 cpm 16 DPM/100 cm 2 DPM/100cm 2 REVIEWED BY: ~-Cl,~~ DATE: s- Y - r7 Ri=AD 1"'!C j/

LN EMERGENCY BUILDING LOCATION DIRECT SMEAR

EXTERIOR ID ALPHA BETA ALPHA BETA 1 EAST WALL 1 72 0 4 0 2 EAST WALL 2 18 0 0 6 3 EAST WALL 3 54 0 0 0 4 EAST WALL 4 63 0 0 4 5 EAST WALL 5 54 0 2 6 6 EAST WALL 6 54 0 0 4 7 EAST WALL 7 36 0 4 6 8 WEST WALL 8 56 0 2 1 9 WESTWALL 9 27 0 0 4 10 WEST WALL 10 45 0 0 0 11 WEST WALL 11 45 0 0 0 12 WEST WALL 12 72 0 7 9 13 WEST WALL 13 90 0 0 0 14 WEST WALL 14 36 0 0 1 15 SOUTH WALL 15 81 0 2 1 16 SOUTH WALL 16 45 0 0 9 17 NORTH WALL 17 81 0 0 9 18 NORTH WALL 18 144 0 2 4 19 ROOF 19 162 171 2 1 20 ROOF 20 81 432 0 4 21 ROOF 21 162 189 2 0 22 ROOF 22 135 144 0 6 23 ROOF 23 144 159 0 4 24 ROOF 24 153 126 0 9 25 ROOF 25 126 216 0 4 26 ROOF 26 45 315 0 0 27 ROOF 27 63 360 0 6 28 ROOF 28 126 167 0 4 29 ROOF 29 162 315 2 4 30 ROOF 30 144 459 0 0 C:\OFFICE\AREA\I\EMERBULD\EXTERIOR.W82

~ - - - - - - - - -- - - -- -- - - - - - - - - - - * - -** - --

04/22199 CIMARRON CORPORATION -CIMARRON FACILITY ALPHA DIRECT TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA "I" EMERGENCY BUILDING EXTERIOR SURVEY (UNAFFECTED) n = DPM 11 OOcm 2 Num~r n (n-N) tn-N)' No. of Sainpl&S fx) : 30 1 72 .0 -13.9 192.3 2 18.0 -67.9 "'605.9 COUNT TIME: 0.5 MINUTES 3 54.0 -31.9 1015.5 4 63,0 *22.9 522.9 Sample Mean (N) = Sumtn) +,..(x,....}--.r-a.---..--~

5 5-4.0 -31.9 1015.5 Sampt. Mean (N) : [ 85.87 6 5-4.0 -31.9 1015.5 1 36.0 -49.9 2486.7 8 56.0 -29.9 892.0 9 27.0 -58.9 3465.3 10 45.0 -40.9 1670.1 Standard Deviation (Sd) = SQRT (ln-N}' + (x -1)]

11 45.0 -40.9 1670.1 12 72 .0 -13.9 192.3 13 00.0 4.1 17.1 Stand rd Deviation: 46.55 14 36,0 -49.9 2486.7 2 Std Oeviations: 93.11 15 81.0 -4.9 23.7 Degree o,11' Fr&edom(df).= (x) -1 Data listed on Table B-1 16 -45.0 -40.9 1670.1 (df)" [ 1.s99 1 17 81 .0 -4.9 23.7 18 144.0 58.1 3379.5 Area'& Average Level (AIJ) =(N) + (df) X [(Sd)/SQRT(x)J 19 162.0 76.1 5796.3 20 81 .0 -4.9 23.7 (A~)"' OPM /100cm 2 21 162.0 76.1 5796.3 GUIDIEUNE VALUE: DPM 1100cm2 22 135.0 49.1 2414.1 Accep~bl* Level: DPM 1100cm*

23 144.0 58.1 3379.5 2-4 153.0 67.1 -4506.9 25 126.0 40.1 1610.7 TABLE B-1 26 45.0 -40.9 1670.1 Factors for Comparlsion of Survey Data with Guidelines 27 63.0 -22.9 522.9 (df) 95*.4 97.5% (df) 953/4 97.5'4 28 126.0 '40.1 1610.7 1 6.314 12.706 19 1.729 2.093 29 162.0 76.1 5796.3 2 2.~2 4.303 20 1.725 2.086 30 144 .0 58.1 3379.5 3 2.353 3.182 21 1.721 2.08 31 0.0 0.0 0.0 4 2.132 2.776 22 1.717 2.074 32 0.0 0.0 0.0 5 2.015 2.571 23 1.714 2.069 33 0.0 0.0 0.0 6 1.943 2.447 24 1.711 2.0£4 3-4 0.0 0.0 0.0 7 1.895 2.365 25 1.708 2.06 35 0.0 0.0 0.0 8 1.86 2.306 26 1.706 2.0S6 36 0.0 o.o o.o 9 1.833 2.262 27 1.703 2.052 37 0.0 0.0 0.0 10 1.812 2.228 28 1.701 2.0-48 38 0.0 0.0 0.0 11 1.796 2.201 29 1.699 2.045 39 0 .0 0.0 0.0 12 1.782 2.179 30 1.697 2.042 40 0.0 0.0 0.0 13 1.771 2.16 40 1.684 2.021 41 0.0 0.0 0.0 14 1.761 2.145 60 1.671 2 42 0.0 o.o 0.0 15 1.753 2.131 120 1.658 1.98 43 0.0 0.0 0.0 16 1.746 2.12 400 1.649 1.966 4-4 0.0 0.0 0.0 17 1.74 2.11 Infinite 1.645 1.96 45 0.0 0.0 0.0 18 1.734 2.101 46 0.0 0.0 0.0 "7 0.0 0.0 0.0

-48 0 .0 0.0 0.0 For Vill\le5 Of OegNIU of f,-.edom not li$ted:

49 0.0 0.0 0.0 Interpolate between the listed,--va_lu_;;_e_s_. ---,--------.-------.------,

50 0.0 0.0 0.0 (df) high value(Z) 40 is (8) 1.684 95*4 (df) low value(Y) 29 is {A) 1.699 95%

DH11'9d value(df) (X) 29 il calcul.tted .u follow:

EXP(( (Ln{B),Ln(A) I+ (Z-VJ )._(:..X_*Y.:..I_+_Ln...:.(A--'1:.:.l_ _ _ _~-~

The (df) value for (X) I 29 I 1.699 95*;.

PERFORMED BY: 11?4 u DATE:

REVJEWEDBY: DATE:

total 2576 Sumlnt 62851.5 Sum(n*N}' PAGE 1 OF 1 C:\OFFICE'AREA\I\EMERBULD\EXTERACM.Vl/82

06/15198 CIMARRON CORPORATION - CIMARRON FACILITY BETA DIRECT TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA RIR EMERGENCY BUILDING EXTERIOR SURVEY (UNAFFECTED) n = DPM /100cm 2 Numbtlr n (n-10 (n-N)' No. of Sampln (xl : 30 1 0.0 -101 .8 10356.S 2 0 .0 -101.8 10356.S COUNT TIME: 0.5 MINUTES 3 0 .0 -101.8 10356.5 4 0.0 -101.8 10356.5 Sample Mean (N) = Sum(n) *,-,:(x2 )....,...r-wo--.

5 0 .0 -101.8 10356.5 Sampl* Mean (N) : ! 101.77 6 0 .0 -101.8 10356.5 7 0 .0 -101.8 10356.5 8 0 .0 -101.8 10356.5 9 0.0 -101.8 10356.5 10 0.0 -101.8 10356.5 Standard Deviation (Sd) =SQRT [(n-N}' + (X .. 1))

11 0.0 -101.8 10356.5 12 0.0 -101.8 10356.S 13 0.0 -101 .8 10356.5 Sandard Deviation: 145..75 14 0.0 -101.8 10356.5 2 Std Deviations: 291 . 50 15 0 .0 -101.8 10356.5 Degree of Fr.. dom(dl).= (X)

1 Data lh1te<t Oil Table B -1 16 0 .0 -101.8 10356.5 (<if}"' I 1.699 1 17 0 .0 -101.8 10356.5 18 0.0 -101.8 10356.5 Area's Average Level (Aµ) :: (N) * (di) x ((Sd)/SCRT(x)]

19 171 .0 69.2 4793.3 20 432 .0 330.2 109054.1 (Aili" DPM /100crrr 21 189 .0 87.2 7609.7 GUIDELINE VALUE: DPM 1100cm2 22 144 .0 42.2 1783.7 Acceptable Level: DPM /100cm 1 23 159.0 57.2 3275.7 24 126.0 24.2 587.3 25 216.0 114.2 13049.3 TABLE 8 - 1 26 315.0 213.2 45468.5 Factor. lor Compulsion of Survey Data with Guidelines 27 360.0 258.2 66684.5 (df) 95'/. 97_5*.4 (df) 95% 97.5 1/4 28 167.0 65.2 4255.4 1 6.314 12.706 19 1.729 2 .. 093 29 315 .0 213.2 45,468.5 2 2.92 4 . 303 20 1.725 2.086 30 459.0 357.2 127615.7 3 2.353 3.182 21 1.721 2.08 31 0.0 0.0 0.0 4 2.132 2 .. 776 22 1.717 2.074 32 a.a 0.0 0.0 5 2.015 2.571 23 1.714 2.069 33 0 .0 0.0 0.0 6 1.943 2.447 24 1.711 2.064 34 0 .0 0.0 0.0 7 1.895 2. 365 25 1.708 2.06 35 0.0 0.0 0.0 8 1.86 2.306 26 1. 706 2 .. 056 36 0.0 0.0 0.0 9 1.833 2.262 27 1.703 2.052 37 0.0 0.0 0.0 10 1.812 2.228 28 1.701 2.048 38 0.0 0.0 0.0 11 1.796 2.201 29 1.699 2.045 39 0.0 0.0 0.0 12 1.782 2.179 30 1.697 2.042 40 0.0 0.0 0.0 13 1.771 2.16 40 1 ..684 2.021 41 0.0 0.0 0.0 14 1 .. 761 2.145 60 1.671 2 42 0.0 0.0 0.0 15 1.753 2.131 120 1.658 1 . 98 43 0.0 0.0 0.0 16 1.746 2.12 <100 1.649 1 . 966 44 0.0 0.0 0.0 17 1.74 2.11 Infinite 1.645 1.96 45 0.0 0.0 0.0 18 1 .. 734 2.101 46 0.0 0.0 0.0 47 0.0 0.0 0.0 48 0 .0 0 .. 0 0.0 For ~lv*s of Degre.$ of Frttdom not listed:

49 0.0 o.o 0.0 Interpolate between the llste_d_va_l_ue_s_.- ~ - - - ~ - - - . . - - - - - - ,

50 0 .0 0. 0 0.0 (df) high value(Z) 40 is 18) 1.684 951/4 (df) low value(Y} 29 Is (A) 1.699 95'/4 OH Ired value(df) {X) 29 is calculat.d as follow:

EXP[( (Ln{Bl*ln(A)) + {Z-Y) )._(._X_-Y) +_Ln--'(_Al...J......._ _ _~----,

The {df) value for CX) I 29 I 1.699 95'/4 I PERFORMED sv:iJt l.t.. ,,< 6wrt-L DATE: ~s~/9<;

REVIEWED BY: 1.J ~Ci.., ~

total 3053 Sumfnl 616061.4 Sum(n-N)'

C:\OFFICE\AREA\I\EMERBULD\EXTERBCM.V'-J82 PAGE 1 OF 1

WEST 9 8 8 8 8 7 9 9 X X X X X X X X 9 9

>< X

- x 6.5 x7 x7 x7 x7 x6 x7 x7 9 6 6 7 6 X X RM 8 X RM 9 X RM 10 X 7 7 NORTH X X 6 7 7 6.5 6 7 7 X AIR X X X X X X 7 7 LOCK X X 7 7 5 6 6 6 6 6 X X X X X X X X x7 7x 8 6 RM 5 6 x8 X SOUTH 6 6 6 7 x . X 8 7 7 X RM 2 X X X X X AIR X 8

LOCK 7 7 6 6 X X X 7 7 X X X X 6 X

6 7 7 SOUTH x9 8x X X x7 X 6 X NORTH 6 7 6 7 7 7 X RM 1 X 6 8 X RM 4 X X 7 X 6 X )(

X X 8 8 R~ 7 X X

7 6 X X

--- -- . -** - *----~ -* *--- ----~

6

- ~ - - - -- -- **- -----

6 X X 9 7 7 X 7 7 X X 7 6 X X 7

~ -- - -- ---- X X RM 6 X 7 6 7 8 7 7 7 7 X X X X X X X X X X X X X X X X 9 8 7 9 8 8 9 9 EAST NOTES:

REJ\OINGS ARE IN MICRO-R/ HR (µR/ Hr)

INSTRUMENT: LUDLUM MICRO-R METER

@ CIMARRON CORPORATION SERIAL NO: 138420 MODEL NO: 19 CIMARRON FACILITY BACKGROUND: 9 µR/Hr PHASE II - SUB-AREA I MICRO-R READINGS ARE AT 1 METER FROM WALL FINAL MICRO-R SURVEY RESULTS AND 1 METER FROM FLOOR 2 0 2 EMERGENCY BUILDING - INSIDE & OUTSIDE DRW. OA1£ REV. DESCRIPTION MWINBY: Cl('!) BY: l.fP-0 BY: Ot\TE SY JE 5-22-99 IS(.AI£ AS SHOWN S C A L E I N MET ERS 0 DRAWING ISSUED. JE WR JL 6/ 21 / 99 JOB NO. DRAWING NO.

99POSIEMS- 17 Io*

...SUBAREAI\ DAER-BLOG\ 8-AER-IN-OUT

70

\

) 50 30 20 to 0 1G 20

) 100

)

"° -----+

30 40 50 60 70 80 90 110 120 150 140 15ll .* 160 170 50 5(

SUB-ARE~ I 40 4{

30 30 20 20 10 10 0 0 10 10 20 r-------------J-20

so.\ -30

\

to .. 0 50 50

\

60-1 \ 50 70

\ 70

~

70 60 50 40 30 20 I NOTES:

REFER TO DATA TABLE FOR SURVEY RESULTS. CIMARRON CORPORATION

~*

CIMARRON FACILITY Q PHASE II - SUB-AREA I Aff[CTED AREA *- SOUTH OF URANIUM PLANT YARD

--~----

SOIL SAMPLE RESULTS - DEPTH 25 0 25 DATE REY. DfSCRIPTIO~I ~ Br:/CKD rm IMP'D 1%1 ~rr t,RW, JE 4-"19-99 SCA!.£:

AS SHOWN ORAWl/iG tr.:J.

SC ALE IN METERS ' 0 I' DRAWING 1ssurn. i .i WR i '6/21/99 rlOB NO; 99POSISS-2 REV.

JE JL 0

- .\SUBARfAI\SOUTli- 0F-U-PtANT-DEPTH\ 99P0SISS-0EPTH

04/14/99

) ) )

CIMARRON FACILITY PHASE II - SUB-AREA 11 I" SOUTH OF URANIUM PLANT AFFECTED - DEPTH RESULTS BACKGROUND MDA BACKGROUND NOT SUBTRACTED INSTRUMENTS: SIN IN LUDLUM MICRO 'R' METER - MIN 19 111299 µr/hr 9 2 REVlEWEO BY: '1-J~a - ~-:..-:..-*~

, DATE: 1/-/r- J?

LUDLUM 2220, UNSHIELDED 3" X 1/2" Nal DETECTOR 97264 CPM 7000 NIA CIMMARON SOIL Total U 4 10 COUNTER 4" X 4" X 16" Nal DETECTOR pCi/G Tb (Nat) 1.5 1.5 3" MICRO MICRO pCl/g LN GRID LOCATION DETECT R' . R' 0- 6° 6"'- 1' 1'- 2* 2' 3* 3' 4'

C.P.M. SURF 1 METER Total- U Th (Nat} Total- U Th (Nat) Total- U Th (Nat) Total- U Th (Nat) TotaJ- U Th (Nat) 1 50 w - 8 s 7952 9 8 7 2 8 2 6 2 6 1 5 1 2 50 w . 12 N 6682 7 7 9 1 6 1 11 1 11 2 14 2 3 30 w - 8 s 8276 8 8 11 1 11 1 10 2 9 1 10 1 A 30 w - 12 N 7874 9 8 9 1 8 1 5 1 ROCK ROCK ROCK ROCK 5 10 w - 8 s 8276 8 8 10 1 12 2 9 1 9 2 7 2 6 10 w - 12 N 8016 8 8 6 2 8 1 13 2 7 2 9 2 7 10 E - 8 s 6956 7 7 16 2 23 1 7 2 7 1 2 1 8 15 E - 12 N 7612 7 7 21 1 14 1 9 1 5 1 9 2 9 30 E - 8 s 6920 8 8 8 1 8 1 10 2 10 2 4 1 10 30 E - 12 N 6912 7 7 10 1 10 1 29 2 13 1 9 1 11 50 E - 8 s 9106 9 9 12 2 11 2 g 1 5 1 ROCK ROCK 12 50 E - 12 N 7076 7 7 13 1 7 1 5 1 11 2 7 1 13 70 E - 8 s 8340 9 g 10 2 10 1 7 1 6 1 ROCK ROCK 14 70 E - 12 N 7292 8 7 10 2 5 2 7 1 8 1 ROCK ROCK 15 90 E - 8 s 8064 8 8 12 1 7 2 7 2 B 2 11 1 16 90 E - 12 N 8434 9 8 10 2 8 2 10 2 5 2 10 1 17 110 E - 12 N 6962 7 7 14 1 4 1 9 1 11 1 8 1 18 130 E - 12 N 6588 7 7 8 1 6 1 7 1 6 1 5 1 19 150 E - 12 N 5264 5 5 6 1 4 1 8 1 6 1 4 1 20 21 22 23 24 11e:c:office\area\i\idatasup. wb2

05/18/99 PHASE II SUB-AREA II I" SOUTH OF URANIUM PLANT CIMARRON SOIL COUNTER AFFECTED DEPTH TOTAL URANIUM SOIL SAMPLE RESULTS SITE BACKGROUND OF 4 pCi/g NOT SUBTRACTED URANIUM SAMPLE DATA FREQUENCY DISTRIBUTION 25 Cf)

-~0 20

<(

w 15

_/- *'-.........

0::

LL 0

a::: 10 w

al 2 5 z

0 2 6 10 14 18 25 30 pCi/g NUMBER OF SAMPLES 90 AVERAGE SAMPLE 9.0 MINIMUM SAMPLE 2.0 MAXIMUM SAMPLE 29.0 STANDARD DEVIATION 4.0 C:\OFFICE\AREA\I\ISUPGRAH.WB2 1

04/14 11 PHASE II SUB-AREA I" SOUTH OF URANIUM PLANT CIMARRON SOIL COUNTER TOTAL THORIUM SOIL SAMPLE RESULTS SITE BACKGROUND OF 1.5 pCi/g NOT SUBTRACTED MARCH, 1999 THORIUM SAMPLE RESULTS FREQUENCY DISTRIBUTION 60

(/)

UJ 50

_J a..

~ 40

<(

~_.,......... . ... CJ)

LL 30 0

0::

w co 20

~

z 10 0

0 1 2 3 pCl/g NUMBER OF SAMPLES 90 AVERAGE SAMPLE 1.4 MINIMUM SAMPLE 1.0 MAXIMUM SAMPLE 2.0 STANDARD DEVIATION 0.5 C:\OFFICE\AREA\I\SOUP\ISUPGPTH.WB2 1

05/18/99 PHASE II SUB-AREA "I" SOUTH OF URANIUM PLANT LUDLUM MODEL 19 S/N 111299 AFFECTED - DEPTH MICRO-R METER READINGS AT SURFACE SITE BACKGROUND OF 9 µR/hr NOT SUBTRACTED RESULTS IN pR/hr MARCH, 1999 MICRO "R" READINGS@ SURFACE FREQUENCY DISTRIBUTION 7 -.---,.-..

~6 z

05

<(

~ 4 -+----,-+-

LL O 3 ----

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~2

~ 1 z

0 5 7 8 9 10

µR/hr NUMBER OF READINGS 19 AVERAGE READING 8 MINIMUM READING 5 MAXIMUM READING 9 STANDARD DEVIATION 1 C:\OFFICE\AREA\l\lSUPGRAH.WB2 1

PHASE II SUB-AREA urn SOUTH OF URANIUM PLANT LUDLUM MODEL 19 S/N 111299 AF.FECTED ~ DEPTH MICRQ .. R METER READINGS AT ONE METER ABOVE SURFACE SITE BACKGROUND OF 9 µR/hr NOT SUBTRACTED RESULTS IN µR/hr MARCH, 1999 MICRO 'R' READINGS @ 1 METER FREQUENCY DISTRIBUTION oo a

(.!)

z 06

<(

w er:

lL 4 0

0:::

~- w2 al

~

=>

ZQ 5 6 7 8 9

µR/hr NUMBER OF READINGS 19 AVERAGE READING 8 MINIMUM READING 5 MAXIMUM READING 9 STANDARD DEVIATION 1 C:\OFFICE\AREA\I\ISUPGRAH.WB2 1

03/31 11 PHASE If SUB-AREA I 11 SOUTH OF URANIUM PLANT 3" Naf DETECTOR AFFECTED - DEPTH GROSS GAMMA READINGS tN CPM LUDLUM MODEL 2220 SIN 97284 (UNSHIELDED)

BACKGROUND AVERAGE: 7000 CPM MARCH, 1999 3" Nal DETECTOR READINGS FREQUENCY DISTRIBUTION 6

~ 5 **+ - - - --+---- ~

z

~ 4 *-l--------1-------1---

w 0:::

LL 3 0

ffi 2 (D

~

, 1 z

O ' 5000 6000 7000 8000 9000 9500 CPM NUMBER OF READINGS 19 AVERAGE READING 7505 MINIMUM READING 5264 MAXIMUM READING 9106 STANDARD DEVIATION 867 C:\OFFICE\AREA\I\ISUPGP30.WB2 1

CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELJNE VALUE AT 95% CONFIDENCE 11 AREA I 11 SOUTH URANIUM OF PLANT (AFFECTED) DEPT.a:

n = pC'/I~ TO TALU Number n (n-N) (n*N) 1 No. of Samples (x) : I 90 1 7.0 -2.0 3.9 2 9.0 0.0 0.0 COUNT TIME: 5 MINUTES 3 11.0 2.0 4.1 4 9.0 o.o 0.0 Sample Moan (N) = Sum(n) + (x) 5 10.0 1.0 1.1 Sample Mo:1n (N) : / 8.97 6 6.0 -3.0 8.8 7 16.0 7.0 49.5 8 21.0 12.0 144.8 9 8.0 -1.0 0.9 10 10.0 1.0 1.1 Standard Ouvlatlon (Sd) = SQRT ((n-N).t + (x - 1)]

11 12.0 3.0 9.2 12 13.0 4.0 16.3 13 10.0 1.0 1.1 Standard Oovi~tlon: ~

14 10.0 1.0 1.1 2 Std Deviations: ~

15 12.0 3.0 9.2 Degrea of Freedom(df).= (x)

1 Data listed on Table B-1 16 10.0 1.0 1.1 {df) = I 1.665 I 17 14.0 5.0 25.3 18 8,0 -1.0 0.9 Area'$ Average Level (A1-1) = (N)-,. (df) x [{Sd)/SQRT(x)]

19 8.0 -3.0 8.8 20 8.0 -1.0 0.9 (Aµ)=~ pCilgU TOTALU 21 6.0 -3.0 8.8 GUIDELINE VA.LUE: pCi/gU TOTAL U 22 11 .0 2.0 4.1 Acceptable Level : pCi/gU TOTAL U 23 8.0 -1 .0 0.9 24 12.0 3.0 9.2 2S 8.0 -1.0 0.9 TABLE B-1 26 23.0 14.0 196.9 Factors for Comparloron of Survey Data with Guldelines 27 14.0 5.0 25.3 (df) 95% 97.5% (df) 95% 97.5%

28 8.0 -1.0 0.9 1 6.314 12.706 19 1.729 2.093 29 10.0 1.0 1.1 2 2.92 4.303 20 1.725 2.086 30 11.0 2.0 4.1 3 2.353 3.182 21 1.721 2.08 31 7.0 -2.0 3.9 4 2.132 2.776 22 1.717 2.074 32 10.0 1.0 1.1 5 2.015 2.571 23 1.714 2.069 33 5.0 -4.0 15.7 6 1.943 2.447 24 1.711 2.064 34 7.0 -2.0 3.9 7 1.895 2.365 25 1.708 2.06 3S 8.0 -1.0 0.9 8 1.86 2.306 :26 1.706 2.056 36 4.0 -5.0 24.7 9 1.833 2.262 27 1.703 2.052 37 6.0 --3.0 8.8 10 1.812 2.228 28 1.701 2.048 38 4.0 *5.0 24.7 11 1.796 2.201 29 1.699 2.045 39 6.0 "3.0 8.8 12 1.782 2.179 30 1.697 2.042 40 11 .0 2.0 4.1 13 1.771 2.16 40 1,684 2.021 41 10.0 1.0 1.1 14 1.761 2.145 60 1.671 2 42 5.0 -4.0 15.7 15 1.753 2.131 120 1.658 1.98 43 9.0 o.o 0.0 16 1.746 2.12 400 1.649 1.966 44 13.0 4.0 16.3 17 1.74 2.11 lriflnlte 1.645 1.96 45 7.0 -2.0 3.9 18 1.734 2.101 46 9.0 0.0 0.0 47 10.0 1.0 1.1 48 29 .0 20.0 401.3 For values of Degrees Of Freedom not listed:

49 9.0 0.0 0.0 Interpolate bettween th,_e_lls...;tvd.;...;._v_a...,..lu_es_._ _ --.-...,.....,_ _____,

50 5.0 -4.0 15.7 (df) high value(Z) 120 Is (B) 1.658 96%

312.0 308.8 (df) low value(Y) 60 is (A) 1.671 95%

0.0 0.0 Desired value(df) (X) 89 is calculated 30 follow:

0.0 0.0 EXP[( (Ln(B)-Ln(A)) + (Z*Y)) (X*Y) + Ln(A)]

0.0 0.0 The {df) value for pq l 69 I 1.665 I 9S%

o.o o.o o.o 0.0 o.o 0.0 PERFORMED BY: ->>;~~ DATE: 3- ;i /-9_q o.o 0.0 o.o 0.0 o.o 0.0 o.o 0.0 REVIEWED BY: V, 0-- ~ 3--)/-0~

DATE: _ _ ___ /_7'""

o.o 0.0 o.o 0.0 o.o 0.0 o.o 0.0 o.o 0.0 total 807 1400.9 Sum(nl Sum(n-N)1 PAGE 1 OF 2 C:\OFFICE\AREA\l\lSUPCMU.WB2

CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA "I" SOUTH URANIUM OF PLANT (AFFECTED} DEPTH n=pCI/ g TOTAL U n = pCi/g TOTAL U Number n (n-N) (n-N}~ Number n (n~N) (n~NP 51 7.0 -1.97 3.87 101 0.0 0.00 0.00 52 7.0 -1.97 3.87 102 0.0 0.00 0.00 53 7.0 -1.97 3.87 103 0.0 o.oo o.oo 54 10.0 1.03 1.07 104 0.0 0.00 0.00 55 9.0 0.03 o.oo 105 0.0 o.oo 0.00 56 7.0 -1.97 3.87 106 0.0 0.00 0.00 57 8.0 -0.97 0.93 107 0.0 o.oo o.oo 58 6.0 -2.97 8.80 108 0.0 0.00 0.00 59 11.0 2.03 4.13 109 0.0 0.00 0.00 60 9.0 0.03 0.00 110 0.0 0.00 0.00 61 9.0 0.03 0.00 111 0.0 o.oo o.oo 62 7.0 -1.97 3.87 112 0.0 0.00 0.00 63 7.0 -1.97 3.87 113 0.0 0.00 0.00 64 5.0 -3.97 15.73 114 0.0 0.00 0.00 65 10.0 1.03 1.07 115 0.0 o.oo 0.00 66 13.0 4.03 16.27 116 0.0 0.00 0.00 67 5.0 -3.97 15.73 117 0.0 o.oo 0.00 68 11.0 2.03 4.13 118 0.0 0.00 o.oo 69 6.0 -2.97 8.80 119 0.0 0.00 o.oo 70 8.0 -0.97 0.93 120 0.0 0.00 0.00 71 8.0 ..Q.97 0.93 121 0.0 o.oo 0.00 72 5.0 -3.97 15.73 122 0.0 o.oo o.oo 73 11.0 2.03 4.13 123 00 0.00 o.oo 74 6.0 -2.97 8.80 124 0.0 0.00 0.00 75 6.0 -2.97 8.80 125 0.0 o.oo 0.00 76 5.0 -3.97 15.73 126 0.0 o.oo o.oo 77 14.0 5.03 25.33 127 0.0 0.00 0.00 78 10.0 1.03 1.07 128 0.0 0.00 0.00 79 7.0 -1.97 3.87 129 0.0 o.oo o.oo 80 9,0 0.03 0.00 130 0.0

0.00 0.00 81 2.0 -6.97 48.53 131 0.0 0.00 0.00 82 9.0 0.03 0.00 132 0.0 0.00 0.00 83 4,0 -4.97 24.67 133 0.0 o.oo o.oo 84 9.0 0.03 0.00 134 0.0 o.oo 0.00 85 7.0 -1.97 3.87 135 0.0 o.oo 0.00 86 11.0 2.03 4.13 136 0.0 o.oo 0.00 87 10.0 1.03 1.07 137 0.0 o.oo 0.00 88 8.0 -0.97 0.93 138 0.0 o.oo o.oo 89 5.0 ..3,97 15.73 139 0.0 0.00 0.00 90 4.0 --4.97 24.67 140 0.0 0.00 0.00 91 0.0 o.oo 0.00 141 0.0 0.00 o.oo 92 0.0 0.00 0.00 142 0.0 o.oo o.oo 93 0.0 0.00 0.00 143 0.0 0.00 0.00 94 0.0 0.00 0.00 144 0.0 0.00 o.oo 95 0.0 0.00 0.00 145 0.0 0.00 o.oo 96 0.0 0.00 0.00 146 0.0 o.oo o.oo 97 0.0 0.00 0.00 147 0.0 0.00 0.00 98 0.0 0.00 0.00 148 0.0 0.00 o.oo 99 0.0 0.00 0.00 149 0.0 o.oo o.oo 100 0.0 0.00 0.00 150 0.0 0.00 o.oo 312.0 308.8 0.0 0.0 Sum(n) Sum(n~N) 2 Sum(n) Sum(n-N)a PAGE20F2 C;\OFFICE\AREA\I\ISUPCMU .WB2

CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA "I" SOUTH URANIUM OF PLANT (AFFECTED)DEPTH n = JJCV<< Th (NAT)

Number n (n-N) (n-N)1 No. of Samples (x) ~ [ 90 J 2.0 0.64 0,42 2 1.0 -0.36 0,13 COUNT TIME: 5 M.TNUTES 3 1.0 -0.36 0.13 4 1.0 -0.36 0.13 Sample Menn (N) "'. Sum(n) + (x)

.s 1.0

-0.36 0.13 Sample Mean (N): I 1.36 I 6 2.0 0.64 0.42 7 2.0 0.64 0.42 8 1.0 -0.36 0.13 9 1.0 -0.36 0.13 JO 1.0 -036 0.13 Standard l>eviatiou (Sd) == SQRT l(n-N) 2 + (x - I)]

I1 2.0 0.64 0.4:Z 12 1.0 --0.36 0.13 13 2.0 0.64 0.42 Standard Deviation: c=m=J 14 2.0 0.64 0.42 2 Std Deviations: ~

15 1.0 -0.36 0.13 Degree ofFreedom(d[,'-' (x) -1 Data listed on Table B-1 16 2.0 0.64 0.42 (df) = 1.665 j 17 1.0 -0.36 0.13 18 1.0 -0.36 0.13 Area's A*w*age Level (Aµ)::::: (N) + (df) x [(Sd)/sqrt(:x)]

19 1.0 -0.36 0.13 20 21 2.0 1.0 0.64

~0.36 0.42 0.13 (Aµ.)=

GUIDELINE VALUE:

rn*44 10 pCi/gTh (NAT) pCi/gTh (NAT) 22 1.0 -0.36 0.13 Atceptablc Level: 4.0 pCi/gTh (NAT) 23 1.0 -0.36 0.13 (2S~. OF GUIDELINE PLUS DA.CKGROUND) 24 2.0 0.64 0,42 25 1.0 -0.36 0.13 TABLE B-1 26 1.0 --0.36 0.13 Factors for Con1parMon of Survey Dl:lta with Guidelines 27 1.0 -0,36 0.13 (dO 95% 97.5% (df) 95% 97.5%

28 1.0 -0.36 0J.3 I 6.314 12.706 19 1.729 2.093 29 1.0 -0.36 0.13 2 2.92 4.303 20 1.725 2.086 30 2.0 0.64 0.42 3 2.353 3.182 21 1.721 2.08 31 1.0 -0.36 0.13 4 2.132 2.776 22 1.717 2-074 32 1.0 -0.36 0.13 5 2,015 2.571 23 1,714 2.069 33 2.0 0.64 0.42 6 1.943 2.447 24 1.711 2.064 34 2 .0 0.64 0.42 7 1.895 2.365 25 1.708 2.06 35 2.0 0.64 0.42 8 1.86 2.306 26 1.706 2.056 36 1.0 -0.36 0.13 9 1.833 2.262 27 1.703 2.052 37 1.0 -0.36 0.13 IO 1.812 2.228 28 1.701 2.048 38 1.0 -0.36 0.13 11 1.796 2.201 29 1.699 2.045 39 2.0 0.64 0.42 12 1,782 2.179 30 1,697 2.042 40 1.0 -0.36 0.13 13 1.771 2.16 40 1.684 2.021 41 2.0 0.64 0.42 14 1.761 2.145 60 1,671 2 4,2 1.0 -0.36 0.13 15 1.753 2.131 120 1.658 1.98 43 1.0 -0.36 0.13 16 1.746 2.12 400 ].649 1.966 44 2.0 0.64 0.42 17 1.74 2.11 Infinite t.645 1.96 45 2.0 0.64 0.42 18 ].734 2.101

.____J~ 1.0 -0.36 0.13 47 2.0 0.64 0.42 48 2.0 0.64 0.42 For values of Degrees of Freedom not listed:

49 1.0 -0.36 0.13 lntcrpolate between th;.:..;;e;..:.h~*sl~ee=-d..:..:va:::.,lu;;;..;;e;.;::,;s.~~,---::-:-=---r--=-~--,

50 1.0 -0.36 0.13 (df) high value(Z) UO is (B 1.658 95%

(df) low value(Y) 60 is A 1.671 95%

53 8.812 Desired value(d1) (X) 89 is cakulated as follow:

0 0.000 EXP[( (Ln(B) - Ln(A.)) + (Z - V) ) (X - Y) + Ln(A) }

0 0.000 The (df) value for (X) l 89 l 1.665 I 95'>/,,

0 0.000 0 0.000 ""':-., -;;, . c.;>c:-;

0 PERFORMED BY: DATE: ~-:.,J /-7 /

REVIEWED BY: DATE: J <H- 77 122.0 20.622 Sum(u) Sum(n-N)2 Page 1 of2 FILE:OWP1 CMTH

CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE 11 AREA I 11 SOUTH URANIUM OF PLANT (AFFECTED) DEPTH n =pCi/e Tb (NAT) n ;;: pCi/e Tb (NAT)

Number n (n-N) (n-N)' Number n (n-N) (n-N) 2 51 1.0 -0.36 0.13 IOI 0.00 o.oo 52 1.0 -0.36 0.13 102 0.00 0.00 53 2.0 0.64 0.42 103 o.oo 0.00 54 2.0 0.64 0.42 104 0.00 0.00 ss 1.0 -0.36 O.J.J 105 0.00 0.00 56 1.0 -0.36 0.13 106 0.00 0.00 57 1.0 -0.36 0.13 107 0.00 0.00 58 1.0 -0.36 0.13 108 0.00 0.00 59 2.0 0.64 0.42 109 0.00 0.00 60 1.0 --0.36 0.13 110 0.00 0.00 61 2.0 0.64 0.42 111 o.oo 0.00 62 2.0 0.64 0.42 112 0.00 0.00 63 1.0 -0.36 0.13 113 o.oo 0.00 64 1.0 -0.36 0.13 114 0.00 0.00 65 2 .0 0.64 Q.42 115 0.00 0.00 66 1.0 -0.36 0.13 116 o.oo 0.00 67 1.0 *0.36 0.13 117 o.oo 0.00 68 2.0 0.64 0.42 ll8 0.00 0.00 69 1,0 -0.36 0.13 119 0.00 0.00 70 1.0 -0.36 0.13 120 0.00 0.00 71 2.0 0.64 0.42 121 0.00 0.00 72 2.0 0.64 0.42 122 0.00 0.00 73 1.0 -0.36 0.13 123 0.00 0.00 74 1.0 -0.36 0.13 124 0.00 o.oo 75 1.0 -0.36 0.13 125 0.00 0.00 76 1.0 -0.36 0.13 126 0.00 0.00 77 2.0 0.64 0.42 127 0.00 0.00 78 1.0 -0.36 0.13 128 0.00 0.00 79 2.0 0.64 0.42 129 o.oo 0.00 80 2.0 0.64 0.42 130 o.oo 0.00 81 1.0 -0.36 0.13 131 0.00 0.00 82 2.0 0.64 0.42 132 o.oo 0.00 83 1.0 --0.36 0.13 133 0.00 0.00 84 1.0 -0.36 0.13 134 0.00 0.00 85 1.0 -0.36 0.13 135 0.00 0.00 86 1.0 -0.36 0.13 136 0.00 0.00 87 1.0 -0.36 0.13 137 0.00 o.oo 88 1.0 u0,36 0.13 138 0.00 0.00 89 1.0 -0.36 0.13 139 0.00 o.oo 90 1.0 *0,36 0.13 140 0.00 o.oo 91 0.00 0.00 141 0.00 o.oo 92 0.00 0.00 142 0.00 0.00

,___ .....143 93 0,00 0.00 0.00 o.oo 94 0.00 0.00 144 0.00 o.oo 95 0.00 o.oo 145 0.00 o.oo 96 0.00 0.00 146 0.00 0,00 97 0.00 0.00 147 0.00 0.00 98 0.00 0.00 148 0.00 o.oo 99 0.00 0.00 149 o.oo o.oo 100 0.00 0.00 150 0.00 o.oo 53 8.812 0 0.000 Sum(n) Sum{n-N)2 Sum(n) Sum(n-N)Z Page 2 of2 FILE:OWP1 CMTH

70 - 50 40 30 20 10 0 10 20 30

.,. 60 70 80 90 URANIUM BU ILDING #1 100 110 120 130 140

-1M 170 70 L- - -~ ___ _ _ -~**- -~ /

) 70 60 60 50 - 50 40 40 30 J - - - - - - - - -- --------.iL-------.,t..------.;>t,..-------i'-..---------.......,,....-----,.11~-----..---~--r1-30 20 20 10 10 0 0

~

10 7+

r. .+ R

~9 1 * '+ *+ 10+ 9+ ---------------20

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I 7 ..+ + B+ ,, 8 ' I ,1 40 8+ + -- + + :<++ +

+I~ 10 50--I \ 50

\ TINHORN

\ (NO SAMPLE) 70 60 50 40 30 20 I NOTES:

URANIUM (pCi/g U).

CIMARRON GAMMA SPEC SOI L COUNTER LEGEND:

h+ URANIUM, 1 - 30 pCi/g U

@ CIMARRON CORPORATION

~ SITE SOIL BACKGROUND OF APPROX . 4.0 pCi/g U, 45+ URANIUM, > 30 pCi / g U CIMARRON FACILITY 4~ NOT SUBTRACTED. PHASE II - SUB-AREA I AFFECTED DRAINAGE SOIL SAMPLE RESULTS - SURFACE 25 0 25 I l l,;,wo ird I OATE SCALE:

REV I DESCRIPTION fun1 sv:I cKD BY 1.wE ~WN. JE 2-7-99 AS SHOWN SCA L E IN METERS t----+- - - - -- - - -- - - - -- - - - -- - --r------t--- -t-------t--- ----1 JOB NO. DRAWING NO. REV.

0 I DRAWING ISSUED. JE I WR I JL l6L21/99 99POS \SS-1 0

...SUBAREAI\SOUTH - OF-U - PLANT- SURFACE\ 99POSISS - 1

05/18/99 I CIMARRON FACILITY SUB AREA "I" DRAINAGE PHASE II RESULTS IN BACKGROUND MDA INSTRUMENTS: S/N LUDLUM MICRO 'R' METER- MIN 19 111299 µr/hr 7-10 2 LUDLUM 2220, UNSHIELDED 3" X 1/2" Nal DETECTOR , 97264 CPM 8386 NIA ICIMMARON SOIL Total U 4.0 10 COUNTER 4" X 4" X 16" Nal DETECTOR ; pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: 1,J. (] .. ,A.,'-f.("_/-</----- DATE: 3- - Id -- ?7 3" Mlc..;RO MICRO LN GRID LOCATION DETECT R' R' O" - 6'

C.P.M. SURF 1 METER Total-U Th (Nat) 1 57 w . 21 s 7152 8 7 11 1 2 52 w - 20 s 7600 8 7 5 1 3 47 w - 18 s 6720 8 7 9 1 4 42 w - 20 s 6782 7 7 8 1 5 37 w - 25 s 7918 7 8 10 1 6 35 w - 30 s 6474 7 7 10 1 7 35 w - 36 s 6260 7 7 8 1 8 35 w - 43 s 6382 7 6 8 1 9 30 w - 46 s 8184 7 7 7 2 10 20 w - 45 s 6786 7 8 8 1 11 15 w - 35 s 8742 8 9 12 1 12 14 w - 40 s 8074 10 9 7 1 13 10 w - 35 s 9666 9 8 12 1 14 9 w - 30 s 8386 10 9 9 1 15 6 w - 25 s 8818 9 10 14 1 16 5 w . 38 s 9084 8 8 9 1 17 3 w - 20 s 8990 10 10 10 2 18 0 w - 13 s 10296 10 11 7 1 19 0 E - 38 s 7416 8 9 8 1 20 5 E - 41 s 8802 9 8 8 1 21 10 E - 43 s 8990 10 8 9 2 22 15 E - 43 s 8826 9 9 8 1 23 20 E - 45 s 8214 9 8 9 1 24 22 E - 45 s 8548 9 9 10 2 25 26 E - 45 s 8944 10 9 14 1 26 27 E - 40 s 9674 10 9 8 1 27 27 E - 35 s 9328 9 9 9 2

28 29 30 30 30 35 E

E E

30 25 20 s

s s

8998 8660 10398 11 9

11 10 9

10 10 6

9 2

1 2

C:\OFFICE\AREA\I\DRAIN\1 DATADRA.WB2

05/18/99 PHASE II SUB-AREA "I" DRAINAGE CIMARRON SOIL COUNTER AFFECTED SURFACE TOTAL URANIUM SOIL SAMPLE RESULTS

SITE BACKGROUND OF 4 pCi/g NOT SUBTRACTED URANIUM SAMPLE DATA FREQUENCY DISTRIBUTION 8

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STANDARD DEVIATION C:\OFFICE\AREA\I\DRAIN\GRAH.WB2 1 2

04/19/99 PHASE II SUB-AREA II I" DRAINAGE CIMARRON SOIL COUNTER SURFACE TOTAL THORIUM SOIL SAMPLE RESULTS SITE BACKGROUND OF 1.5 pCi/g NOT SUBTRACTED MARCH, 1999 THORIUM SA1 M PLE RESULTS FREQUENCY DISTRIBUTION 25 Cl) w

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05/18/99 PHASE II SUB-AREA II I" DRAINAGE LUDLUM MODEL 19 S/N 111299 AFFECTED - SURFACE MICRO-R METER READINGS AT SURFACE SITE BACKGROUND OF 9 µR/hr NOT SUBTRACTED RESULTS IN µR/hr MARCH, 1999 MICRO "R" READINGS @ SURFACE FREQUENCY DISTRIBUTION 8

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µR/hr NUMBER OF READINGS 30 AVERAGE READING 9 MINIMUM READING 7 MAXIMUM READING 11 STANDARD DEVIATION 1 C:\OFFICE\AREA\I\DRAIN\GRAH.WB2 1

06/23/99 PHASE II SUB-AREA 11 I 11 DRAINAGE LUDLUM MODEL 19 S/N 111299 AFFECTED - SURFACE MICRO-R METER READINGS AT ONE METER ABOVE SURFACE SITE BACKGROUND OF 9 pR/hr NOT SUBTRACTED RESULTS IN µR/hr MARCH, 1999 MICRO 'R' READINGS @ 1 METER FREQUENCY DISTRIBUTION Cl) 10

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04/19/99 PHASE II SUB-AR EA "I" DRAINAGE J"NalDETECTOR AFFECTED - SURFACE GROSS GAMMA READINGS IN CPM LUDLUM MODEL 2220 S/N 97264 (UNSHIELDED)

BACKGROUND AVERAGE: 8386 CPM MARCH, 1999 3" Nal DETECTOR READINGS FREQUENCY DISTRIBUTION 14 Cl) 12 C)

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6000 7000 BCD00 9000 10000 *10500, i

CPM NUMBER OF READINGS 30 AVERAGE READING 8304 MINIMUM READING 6260

MAXIMUM READING STANDARD DEVIATION C:\OFFICE\AREA\I\DRAIN\GRAH.WB2 10398 1124 1

04/19/99 CIMARRON CORPORATION

CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA "I" DRAINAGE (AFFECTED) SURFACE n = P'Cil~ T 0 TAL U Number n (n-N) (n-N)' No. of Sample. (x) : 30 1 11.0 1.9 3.7 2 5.0 -4.1 16.5 COUNT TIME: 5 MINUTES 3 9.0 -0.1 0.0 4 B.O -1.1 1.1 Sample Mean (N) = Sum(n) + (x) 5 10.0 0.9 0.9 Sample Mean (N): I 9.07 6 10.0 0.9 0.9 7 8.0 -1.1 1.1 8 8.0 -1.1 1.1 9 7.0 -2.1 4.3 10 8.0 -1.1 1.1 Standard Deviation (Sd) = SQRT l(n-N)' + (x -1)1 11 12.0 2.9 8.6 12 7.0 -2.1 4.3 13 12.0 2.9 8.6 Standard Deviation: ~

14 9.0 -0.1 0.0 2 Std Devlatlons: LJ:!.O 15 14.0 4.9 24.3 Degree of Freedom(df).= {x)

1 Data listed on Table B-1 16 9.0 -0.1 0.0 w> = 1 1.s99 1 17 10.0 0.9 0.9 18 7 .0 -2.1 4.3 Area's Average Level (Aµ) = (N) + (df) x [(Sd)/SQRT(x)]

19 8.0 -1.1 1.1 20 8.0 -1 .1 1.1 {Aµ)= ~ pCi/gU TOTAL U 21 9.0 -0.1 0.0 GUIDELINE VALUE : pCi/gU TOTAL u 22 8.0 -1.1 1.1 Acceptable Level: pCi/gU TOTAL U 23 9 .0 -0.1 0.0 24 10.0 0.9 0.9 25 14 .0 4.9 24.3 TABLE B -1 26 8 .0 -1.1 1.1 Factors for Compariaion of Survey Data with Guidelines 27 9.0 -0.1 0.0 (df) 95-;. 97.So/. (df) 95% 97.5%

28 10.0 0.9 0.9 1 6.314 12.706 19 1.729 2.093 29 6.0 -3.1 9.4 2 2.92 4.303 20 1.725 2.086 30 9.0 -0.1 0.0 3 2.353 3.182 21 1.721 2.08 31 0.0 0.0 0.0 4 2.132 2.776 22 1 .717 2.074 32 0.0 0.0 0.0 5 2.015 2.571 23 1.714 2.069 33 0.0 0.0 0.0 6 1.943 2.447 24 1.711 2.064 34 0.0 0.0 0.0 7 1.895 2.365 25 1.708 2.06 35 0.0 0.0 0.0 8 1.86 2.306 26 1.706 2.056 36 0.0 0.0 0.0 9 1.833 2.262 27 1.703 2.052 37 0.0 0.0 0.0 10 1.812 2.228 28 1.701 2.048 38 0.0 0.0 0.0 11 1.796 2.201 29 1.699 2.045 39 0.0 0.0 0.0 12 1.782 2.179 30 1.697 2.042 40 0.0 0.0 0.0 13 1.771 2.16 40 1.684 2.021 41 0.0 0.0 0.0 14 1.761 2.145 60 1.671 2 42 0,0 0.0 0.0 15 1.753 2.131 120 1.658 1.98 43 0.0 0.0 0.0 16 1.746 2.12 400 1.649 1.966 44 0.0 0.0 0.0 17 1.74 2.11 Infinite 1.645 1.96 45 0.0 0.0 0.0 18 1.734 2.101 46 0.0 0.0 0.0 47 0.0 0.0 0.0 48 0.0 0.0 0.0 For values of Degrees of Freedom not listed:

49 0.0 0.0 0.0 lnt9rpolate between th~e_lis_t_ed_v_a~lu_e_a._ _~ - - - - - ~

50 0,0 0.0 0.0 ldfl high value(Z) 40 Is (B) 1 .984 95"/,

0.0 0.0 (df) low value(Y) 29 Is (A) 1.699 95%

0.0 0.0 DHlred value(df) {X) 29 is calculated as follow:

0.0 0.0 EXP[( (Ln(B)-Ln(A)) + (Z*Y)) (X-Y) + Ln(A)]

0.0 0.0 The (df) value for {X) I 29 I 1.699 ! 95% I

~

0.0 0.0 0.0 0.0 PERFORMEDBY:~ DATE:';(-/9-79 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 REVIEWED BY: tJ. Q, ~

0.0 0.0 0.0 0.0 0.0 o.o 0.0 0.0 0.0 0.0 total 272 121.9 Sum(n} Sum(n-N)2 PAGE 1 OF 1 C:\OFFICE\AREA\I\0RAIN\ORAINCMU.WB2

04/19/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA 11 I 11 DRAINAGE (AFFECTED) SURFACE n = pCi/~ Tb (NAT)

Numbtr n (n-N) (n-N)1 No. of Samples (x) : I 30 1 1.0 -0.23 0.05 2 1.0 -0.23 0.05 COUNT TIME: 5 MINUTES 3 1.0 -0.23 0.05 4 1.0 -0.23 0.05 Sample Mean (N) = Sum(n)-:- (x) s 1.0 -0.23 0.05 Samplt Mean (N) : I 1.23 I 6 1.0 --0.23 0.05 7 1.0 -0.23 0.05 8 1.0 -0.23 0.05 9 2.0 0,77 0.59 10 1.0 -0.23 0.05 Standard Deviation (Sd) = SQRT ((n-N) 1 .;.- (x - ]))

11 1.0 -0.23 0.05 12 1.0 --0.23 0.05 13 1.0 -0.23 0.05 Standard Deviation: D}CJ 14 1.0 -0.23 0.05 2 Std Deviations: C))O JS 1.0 -0.23 0.05 Degree of Freedom(d[.= (x) - 1 Data listed on Table B-1 16 1.0 -0.23 0.05 (df) = 1.699 I 17 2.0 0.77 0.59 18 1.0 -0.23 0.05 Area's A,*erage Le'\-'el (AJ.1) = (N) + (df) x l(Sd)/sqrt(x))

19 1.0 -0.23 0.05 20 1.0 -0.23 0.05 {Aµ)= r n . 3 7 pCi/gTh (NAT) 21 2.0 0.77 O.S9 GUIDELINE VALUE: 10 pCi/gTh (NAT) 22 1.0 -0.23 0.05 Acceptablt uvel: 4.0 pCi/gTh (NAT) 23 1.0 -0.23 0.05 (25*/4 OF GUIDELINE PLUS BACKGROU::-10) 24 2.0 0.77 O.S9 25 1.0 -0.23 0.05 TABLE B - 1 26 1.0 -0.23 0.05 Factors for Comparision ofSurvty Data with Guidelines 27 2.0 0.77 0.59 (df) 95% 97.S% (df) 95% 97.5%

28 2.0 0.77 O.S9 1 6.314 12.706 19 1.729 2.093 29 1.0 -0.23 0.05 2 2.92 4.303 20 1.725 2.086 30 2.0 0.77 0.59 3 2.353 3.182 21 1.721 2.08 31 0.0 0.00 0.00 4 2. 132 2.776 22 1.717 2.074 32 0.0 0.00 0.00 5 2.015 2.571 23 1.714 2.069 33 0.0 0.00 0.00 6 1.943 2.447 24 l.711 2.064 34 0.0 0.00 0.00 7 1.895 2.365 25 1.708 2.06 35 0.0 0.00 0.00 8 1.86 2.306 26 1.706 2.056 36 0.0 0.00 0.00 9 1.833 2.262 27 1.703 2.052 37 0.0 0.00 0.00 JO 1.812 2.228 28 1.701 2.048 38 0.0 0.00 0.00 11 1.796 2.201 29 1.699 2.045 39 0.0 0.00 0.00 12 1.782 2.179 30 1.697 2.042 40 0.0 0.00 0.00 13 1.771 2.16 40 1.684 2.02) 41 0.0 0.00 0.00 14 1.761 2.145 60 1.671 2 42 0.0 0.00 0.00 15 1.753 2.131 120 1.658 1.98 43 0.0 0.00 0.00 16 1.746 2.12 400 1.649 1.966 44 0.0 0.00 0.00 17 1.74 2.11 Infinite ).645 1.96 45 0.0 0.00 0.00 18 1.734 2.101 46 0.0 0.00 0.00 47 0.0 0.00 0.00 48 0.0 0.00 0.00 For values of Degrees of Freedom not listed:

49 0.0 0.00 0.00 Interpolate between th_e_l_ist_e_d_v_al_u_es_.- - - - - ~ - - ~

so 0.0 0.00 0.00 (df) high value(Z) 40 is (B) 1.684 95%

(df) low value(Y) 29 is (A) 1.699 95%

0 0.000 Desired value(df) (X) 29 is calculated as follow:

0 0.000 EXPI( (Ln(B)

Ln(A)) + (Z - Y)) (X - Y) + Ln(A) I 0 0.000 The (df) value for (X) I 29 I 1.699 ! 95%

0 0.000 0 0.000 0 0.000 PERFORMED B Y , ~ DATE: .//~19-7'1 REVJEWED BY: ~ ;; 'f-1r-29 DATE:

37.0 5.367 Sum(n) Sum(n-N) 2 Page I of I C:\OFFICE\AREA\I\PUPYDEP\IPPYCMTH.WB2

,)

) 0 *' too

~

70 blt . . 50 40 30 20 10 10 20 30 40 \ 50 60 70 80 90 110 120 130 uo 15" ) 160 HO URANIUM BUILDING #1 70 SlDEWAL\ } 70

~__,J

) ~- ~ J 60 60 so 50 SUB-AREA I 40 '40 12 8 I ! 10 tQ ; 9 7 10 J 23 17 1,1 7 30 30 61JP+_'9+1:~+fai-~?+ 22i:?t..- ~i':k/1+:': 11.i:>:9>:s+ 1/*$;<,s/a+ -~./1s;114*7'.+*. 6+-:?~.l6+ .i; '1+'i1~*.9+ 1+ 8+ _. 8+

0 8 . '11J1t+ 9+l-i.._:

20 I 8J ll+ 1~+* 8~ 9+ -~+ 7~ H+._12+ 10+.184 _1~+ -il~. 6~ lb+20+28+*-* 74 12~ 9+.11+ 9+- 5+.16~ 9_t 9+ 18+ 124 .i+~i;"!n~_i~+ 16+ . 8+ J+ *12+ 20

\..-,.,.......:H:7.-=-;--;~-;;:;--c;;-*-7:::-:+::-,-\;-;4;-:-+:-*::-';s+ :~+

8110+ l?+ l~ 10+ ~~ *5+_15+ ' 9-4-22+ '~4; ?+. \ ,-1'9j1.3+ 11:i, 9+ i3+ 1~+ t5+ 11>2+-B-i: it~ 10; B+Jo_; *1;_.i+ 6+ _s .. ~+ fO+*lO~ U+

10 .* 9+ 0 !J.~: *6+ 10+ 84 to4 !0 104 8+ H+ 9+ .~;*1e+ 17;+-*_94 127 . 9+ If+ 15+: 7_4 __ id+ 1t+~~tt0+ B+ -10+,. t1+ _9+ 94 ~2~ 1_0~ 1~+ ~+ *11+ {+ 6+ _S+ 1+ 8+ -84 5+ 54:° 10

. s+ 1+ H+ s_.: 9+ 4+ 94 9+ 4 n 8+ 84 rn+ r,; 12+2s ~o+ t24 ,t5+_11_; _t24 21:;.* ~+ __ 7+11+:t1/4: ~+ ~+ n+ n; 9+ 84 2+ 14_11+ 12+ o+* a4 - -g~ 1.0+ 6+ 7+ &+ 5+ 7+

0 .li+ a+-tQ+.10,..)2+J4 ~+ .9+ 7 '7+ ,9-+ :W+- 1.1l.JI; 10~jJ_+- J1+..l.9;iu+ ,w+***~+

11'~H+' 'il+J*f~_l2+)1+ ,ff+ P+ 1Z+ .D+:_t2+l0J s; 1+ l+ 11+ 4+ .&; 10~ n+* 8+ '+ 5+ 0

1q+_ ~+

1+ 7~_ s+ --8+ 1.2+

1{) it+ *8+ 9+10+. 8+10+ 134 10 5+

B+ . 7-f~11+* '.~9+ .8+i I}+

20 8+ 74> 7,._ t 1j 94- 11~ ~~ 20 7+ 9+ D~ -9+ 1\ f>+

30, \ 30

\

40 40 50 50

\

so__,...-.,..--.,..-.i..--,---.,...--,---~.,....--......

70 60 50 40 30 20 NOTES:

i . LEGEND: ~

URl~IUM (pCi/g U}. 0 URANIUM, 1 _ 30 Ci/q U ll(!a__ CLWARRON CORPORATION CIMARRON GAMMA SPEC SOIL COUNTER + p

1------------------1 SITE SOIL B.\CKGROUNO OF APPROX. 4.0 pCi/g lJ, ~lR UHANIUM, > 30 pCi/g U CIMARRON FACILITY PHASE II - SUB-AREA I

~ NOT SUBTRACTED. ,.*.-, .,.

~~ AFFECT£0 AREA - SOUTH OF URANIUM PLANT YARD SOIL SAMPLE RESULTS - SURFACE 25 0 25 IP.£1/. I

,~~ D.41E SC.Al..£;

DESCRIPTION fuN BY:! cK'D 1i'r': lm'o BYd D'.lE ~ JE 4-19-99 AS SHOWM JOB NO. DRAWING ~K}. RE:V.

SCALE IN METERS lt--o+1o-RA-WI-NG_ISS_UE_o_-----------+1-J-E---11-w=*R-t-l-JL----t[-r;;:--21-,--/9-19I 99POSISS-0 0

...\SUBAREAI\SOUTH-Of-U-PLANT - SURfACE\99POSISS

05/18/99 CIMARRON FACILITY SUB AREA 11 t* PHASE II SURFACE AFFECTED - SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: SIN LUDLUM MICRO 'R' METER - MIN 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X 1/2" Nat DETECTOR 97264 CPM 7160 NIA CIMMARON SOIL Total U 4.0 10 COUNTER 411 X 4" X 1611 Nal DETECTOR oCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: 1-J. 0 . .::, .,___./ .3-..,,. / 8 _, 'Y ?

/ - DATE:

3" MICRO' MICRO LN GRID LOCATION DETECT R' R' 0" - 6'

C.P.M. SURF 1 METER Total-U Th (Nat) 1 65 w - 0 N 7786 8 8 6 2 2 65 w - 5 N 8060 9 8 3 1 3 65 w - 10 N 8162 8 8 8 2 4 65 w - 15 N 7528 8 8 6 2 5 60 w - 25 s 8256 9 8 8 1 6 60 w - 20 s 8016 9 9 8 1 7 60 w - 15 s 6606 8 7 5 1 8 60 w - 10 s 8036 g 8 11 1 9 60 w - 5 s 7726 9 8 10 1 10 60 w - 0 N 7878 8 8 11 1 11 60 w - 5 N 7482 9 8 6 1 12 60 w - 10 N 8968 9 9 11 1 13 60 w - 15 N 8210 7 7 6 1 14 55 w - 25 s 8196 9 8 7 1 15 55 w - 20 s 6882 7 7 7 1 16 55 w ~

15 s 7682 8 8 8 1 17 55 w ~

10 s 7782 8 8 8 1 18 55 w - 5 s 7670 8 8 6 2 19 55 w - 0 N 8100 8 8 8 1 20 55 w - 5 N 8100 9 8 7 1 21 55 w - 10 N 8350 8 8 8 1 22 55 w - 15 N 8104 8 8 10 1 23 50 w - 25 s 7318 8 8 g 1 24 50 w . 20 s 6812 7 7 7 1 25 50 w ~

15 s 7584 8 8 7 1 26 50 w - 10 s 8194 8 8 9 2 27 50 w - 5 s 8096 8 7 7 2 28 50 w - 0 N 7810 8 8 10 *1 29 50 w - 5 N 8252 8 8 9 1 30 50 w - 10 N 8112 8 8 9 1 C:\OFFICE\AREA\I\SOUPY\IDATSUPY .WB2 1

05/18/99 CIMARRON FACILITY SOB AREA "I" PHASE II SURFACE AFFECTED - SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENiS: S/N LUDLUM MICRO 'R' METER - MIN 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X 1/2" Nal DETECTOR 97264 CPM 7160 N/A CIMMARON SOIL Total U 4.0 10 COUNTER 4" X 4" X 16" Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: iJ,a. _,.,~

/ - .,--

,I DATE: 5----1 '8 - 9 9 3" MICRO MICRO LN GRID LOCATION DETECT ,R' R' O" -6'

C.P.M. SURF 1 METER Total-U Th (Nat) 31 50 w - 15 N 7976 8 8 9 2 32 45 w - 25 s 7970 7 7 13 1 33 45 w - 20 s 7384 7 7 11 1 34 45 w - 15 s 8012 8 8 12 1 35 45 w - 10 s 8030 8 8 10 1 36 45 w - 5 s 7810 8 8 7 1 37 45 w - 0 N 7486 7 8 10 1 38 45 w - 5 N 8242 8 8 8 1 39 45 w - 10 N 8342 9 8 9 1 40 45 w - 15 N 8204 9 8 8 1 41 40 w - 25 s 7336 7 7 9 1 42 40 w - 20 s 7978 9 8 9 1 43 40 w - 15 s 8088 9 8 9 1 44 40 w - 10 s 7406 9 8 8 1 45 40 w - 5 s 8250 8 8 9 1 46 40 w - 0 N 7198 8 8 12 1 47 40 w - 5 N 8436 8 8 9 2 48 40 w - 10 N 8076 8 8 6 1 49 40 w - 15 N 8460 8 8 9 1 50 35 w - 25 s 8518 8 8 11 1 51 35 w - 20 s 8316 8 8 11 1 52 35 w - 15 s 7746 8 8 8 1 53 35 w - 10 s 7838 9 8 10 1 54 35 w - 5 s 8106 8 8 8 1 55 35 w - 0 N 8414 9 9 11 1 56 35 w - 5 N 7978 8 8 4 2 57 35 w - 10 N 8530 8 8 10 1 58 35 w - 15 N 6362 7 7 7 1 59 30 w - 25 s 9028 9 8 5 1 60 30 w - 20 s 7562 9 9 8 1 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 2

05/18/99 CIMARRON FACILITY SUB AREA "I" PHASE II SURFACE AFFECTED - SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: S/N LUDLUM MICRO 'R' METER - M/N 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X 1/2" Nal DETECTOR 97264 CPM 7160 NIA CIMMARON SOIL Total u 4.0 10 COUNTER 4 X 4" X 16" Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: 'µJ,Q, X:~, ., {.-__, DATE: y*~*/ 6'--99 3" MICt-KJ MICRO LN GRID LOCATION DETECT R' R' O" -6'

C.P.M. SURF 1 METER Total-LI Th (Nat) 61 30 w - 15 s 8066 8 8 11 1 62 30 w - 10 s 7826 8 8 13 1 63 30 w - 5 s 7938 8 8 12 1 64 30 w - 0 N 8286 8 8 9 1 65 30 w - 5 N 8528 9 9 9 2 66 30 w - 10 N 7142 8 7 8 1 67 30 w - 15 N 8054 8 8 *14 2 68 25 w - 25 s 8540 8 8 8 1 69 25 w - 20 s 8580 8 8 8 1

.,. --- .... , 70 25 w - 15 s 8352 8 8 8 2 71 25 w - 10 s 8652 9 8 9 2 72 25 w - 5 s 8460 8 8 9 2 73 25 w - 0 N 8480 9 9 9 1 74 25 w - 5 N 8384 9 9 9 1 75 25 w - 10 N 6432 7 7 10 1 76 25 w - 15 N 7396 7 7 6 1 77 25 w . 20 N 8246 8 8 10 2 78 25 w - 25 N 9106 8 8 8 2 79 25 w - 30 N 8064 7 7 12 2 80 20 w - 25 s 9582 10 9 25 1 81 20 w - 20 s 9440 10 9 14 2 82 20 w - 15 s 8960 10 9 5 2 83 20 w - 10 s 7574 8 B 8 1 84 20 w - 5 s 8890 8 8 11 2 85 20 w - 0 N 9054 9 8 7 2 86 20 w - 5 N 8124 8 8 11 2 87 20 w - 10 N 7924 8 8 10 1 88 20 w - 15 N 8656 9 9 8 1 89 20 w - 20 N 8792 8 8 8 1 90 20 w - 25 N 8508 9 8 11 1 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 3

05118/99 CIMARRON FACILITY SUB AREA "I" PHASE II SURFACE AFFECTED

SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: S/N LUDLUM MICRO 'R' METER - MIN 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 311 X 1/2" Naf DETECTOR 97264 CPM 7160 NIA CIMMARON SOIL Total U 4.0 10 COUNTER 4 X 411 X 16" Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED ,,

REVIEWED BY: W.CL. rt>-,...I DATE: S'-1 ~-77 3 MICRO MICRO LN GRID LOCATION DETECT R' R' 0"-6'

C.P.M. SURF 1 METER Total-U Th (Nat) 91 20 w - 30 N 5738 8 8 8 2 92 15 w - 25 s 8840 8 8 7 1 93 15 w - 20 s 8812 8 9 9 2 94 15 w - 15 s 7808 7 7 10 1 95 15 w - 10 s 8562 9 8 11 1 96 15 w - 5 s 8670 9 8 11 2 97 15 w - 0 N 8640 9 8 7 2 98 15 w - 5 N 8802 9 8 8 2 99 15 w - 10 N 8916 8 8 10 2 100 15 w - 15 N 8506 9 8 10 1 101 15 w - 20 N 8866 8 8 11 2 102 15 w - 25 N 8610 8 8 11 2 103 15 w - 30 N 7948 8 8 8 1 104 10 w - 25 s 10624 10 10 14 2 105 10 w - 20 s 8996 -*****.,. .,..****

9 9 9 2 106 10 w - 15 s 9140 9 8 13 2 107 10 w - 10 s 8456 8 8 7 2 108 10 w - 5 s 8534 9 9 14 1 109 10 w . 0 N 8604 9 9 9 1 110 10 w - 5 N 8784 9 9 8 1 111 10 w - 10 N 8706 9 8 8 1 112 10 w ~ 15 N 8632 . 9 8 10 1 113 10 w - 20 N 7686 8 8 10 1 114 10 w -. 25 N 7962 9 8 9 1 115 10 w - 30 N 8006 8 7 12 2 116 5 w - 25 s 9246 8 8 12 2 117 5 w - 20 s 8476 9 9 10 1 118 5 w - 15 s 10416 *10 9 10 2 119 5 w - 10 s 8506 10 9 14 1 120 5 w - 5 s 8798 10 9 9 2 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 4

05/18/99 CIMARRON FACILITY

' SUB AREA nr* PHASE I I SURFACE AFFECTED - SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: SIN LUDLUM MICRO 'R' METER - MIN 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X 1/2° Nal DETECTOR 97264 CPM 7160 N/A CIMMARON SOIL Total U 4.0 10 COUNTER 4 11 X 4" X 16" Nal DETECTOR pCI/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: µ_),, Q, ~~ DATE: j- /8 ~5'5-'

3" MICRO MICRO LN GRID LOCATION DETECT R' R' 0" -6'

C.P.M. SURF 1 METER Total-U Th (Nat) 121 5 w - 0 N 8780 10 9 10 2 122 5 w - 5 N 9516 9 9 10 2 123 5 w - 10 N 8972 9 8 11 2 124 5 w . 15 N 8412 8 8 12 2 125 5 w - 20 N 8382 8 8 8 1 126 5 w - 25 N 8190 8 8 12 2 127 5 w - 30 N 8372 9 8 10 2 128 0 E - 25 s 9320 9 9 6 2 129 0 E - 20 s 8876 10 9 11 1 130 0 E - 15 s 8056 9 8 8 1 131 0 E - 10 s 7660 8 7 21 1 132 0 E - 5 s 8212 8 8 20 2 133 0 E - a N 6458 8 8 11 1 134 0 E - 5 N 8346 9 9 17 2 135 0 E - 10 N 8080 8 7 9 2 136 0 E - 15 N 8336 8 8 10 2 137 0 E - 20 N 8654 9 8 9 2 138 0 E . 25 N 8482 9 8 8 2 139 0 E - 30 N 8420 8 7 10 1 140 5 E - 25 s 8860 10 8 11 2 141 5 E - 20 s 8704 9 9 10 2 142 5 E - 15 s 8324 9 a 8 2 143 5 E - 10 s 7618 7 7 12 1 144 5 E - 5 s 8190 8 8 14 2 145 5 E - 0 N 7914 8 8 8 2 146 5 E - 5 N 7474 8 7 12 2 147 5 E - 10 N 8512 9 8 9 1 148 5 E - 15 N 7178 8 8 6 1 149 5 E - 20 N 7256 7 7 8 1 150 5 E - 25 N 8058 8 8 10 2 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 5

05/18/99 CIMARRON FACILITY SUB AREA "I" PHASE II SURFACE AFFECTED

SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: S/N LUDLUM MICRO 1R' METER - MIN 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 311 X 1/2" Nal DETECTOR 97264 CPM 7160 NIA CIMMARON SOIL Total U 4.0 10 COUNTER 4" X 4" X 1611 Nal DETECTOR pCi/G Th (Nat) 1,5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY:

3" 1<).u . ~~--

MICRO I MICRO DATE: j-/ '8 -9?

LN GRID LOCATION DETECT R' R' 0" -6'

C.P.M. SURF 1 METER Total-U Th (Nat) 151 5 E - 30 N 7922 9 8 9 2 152 10 E - 25 s 9054 8 8 8 2 153 10 E - 20 s 8822 8 8 9 1 154 10 E - 15 s 7760 8 8 9 1 155 10 E - 10 s 7208 7 7 14 1 156 10 E - 5 s 7520 7 7 18 1 157 10 E - 0 N 7708 7 7 10 1 158 10 E - 5 N 7548 8 8 25 2 159 10 E - 10 N 8658 9 7 18 1 160 10 E - 15 N 7722 8 8 5 1 161 10 E - 20 N 7546 8 8 7 1 162 10 E - 25 N 7540 8 7 9 1 163 10 E - 30 N 7314 8 7 7 1 164 15 E - 25 s 8594 8 8 8 2 165 15 E - 20 s 8724 9 9 7 2 166 15 E - 15 s 7612 7 7 11 1 167 15 E - 10 s 7018 7 7 17 1 168 15 E - 5 s 6916 8 7 10 2 169 15 E - D N 7434 8 8 11 1 170 15 E - 5 N 7472 7 8 20 2 171 15 E - 10 N 7248 8 7 17 1 172 15 E - 15 N 8234 8 8 15 1 173 15 E - 20 N 9832 9 8 11 1 174 15 E - 25 N 7746 9 8 10 2 175 15 E - 30 N 6774 7 7 4 2 176 20 E - 25 s 8668 9 9 8 2 177 20 E - 20 s 8658 9 9 6 2 178 20 E - 15 s 7242 7 7 11 1 179 20 E - 10 s 6782 7 7 8 1 180 20 E - 5 s 7014 7 7 17 1 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 6

05/18/99 I CIMARRON FACILITY SUB AREA "I" PHASE II SURFACE AFFECTED - SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: SIN LUDLUM MICRO 'R' METER - M/N 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X 1/2" Nal DETECTOR 97264 CPM 7160 NIA CIMMARON SOIL Total u 4.0 10 11 COUNTER 4° X 4 X 16 Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: iJ. a, ~~ DATE:

o-----1 t ;9Y 3" MICRO MICRO LN GRID LOCATION DETECT R' R' O" -6'

C.P.M. SURF 1 METER Total-lJ Th (Nat) 181 20 E - 0 N 7506 8 8 11 1 182 20 E - 5 N 6954 8 8 12 1 183 20 E - 10 N 7078 9 8 9 1 184 20 E - 15 N 7198 8 8 9 1 185 20 E . 20 N 8220 9 8 12 1 186 20 E - 25 N 7954 8 8 12 2 187 20 E . 30 N 6870 8 7 "10 1 188 25 E ~

25 s 8898 9 8 7 -1 189 25 E - 20 s 8900 8 8 6 2

.-----*.... 190 25 E - 15 s 8184 7 8 10 2 191 25 E - 10 s 6648 7 7 14 1 192 25 E - 5 s 6778 7 7 9 1 193 25 E - 0 N 7638 8 7 10 2 194 25 E - 5 N 7604 8 8 15 1 195 25 E - 10 N 7006 8 7 12 1 196 25 E - 15 N 7648 8 7 22 2 197 25 E - 20 N 9262 9 9 10 2 198 25 E - 25 N 9710 10 9 22 2 199 25 E - 30 N 7712 7 8 13 1 200 30 E - 25 s 9110 9 8 13 1 201 30 E - 20 s 9110 9 8 7 2 202 30 E - 15 s 8702 9 B 15 2 203 30 E - 10 s 7088 8 8 6 1 204 30 E - 5 s 6348 7 7 7 1 205 30 E - 0 N 8232 7 8 30 1 206 30 E - 5 N 7714 8 8 11 2 207 30 E - 10 N 6832 7 7 9 1 208 30 E - 15 N 7712 8 6 14 1 209 30 E - 20 N 8194 9 8 18 1 210 30 E #

25 N 9020 10 9 22 2 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 7

05/18/99 CIMARRON FACILITY SUB AREA "I" PHASE II SURFACE AFFECTED .. SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: SIN LUDLUM MICRO 'R' METER

MIN 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X *1/2" Nal DETECTOR 97264 CPM 7160 N/A CIMMARON SOIL Total U 4.0 10 COUNTER 4 11 X 411 X 16" Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: 7,J.Q, ~_/ DATE: Sr/8,J9Y 3" MICRO MICRO LN GRID LOCATION DETECT R' R' O" - 6'

C.P.M. SURF 1 METER Total-U Th (Nat) 211 30 E - 30 N 8796 8 8 23 1 212 35 E - 25 s 8408 9 9 18 1 213 35 I= - 20 s 6476 8 7 8 2 214 35 E - 15 s 8356 9 8 10 2 215 35 E - 10 s 88.80 9 9 10 2 216 35 E - 5 s 7072 7 7 4 1 217 35 E - 0 N 8832 9 8 20 2 218 35 E - 5 N 7692 8 8 12 2 219 35 E - 10 N 6660 7 7 H 1 220 35 E - 15 N 7366 8 8 6 1 221 35 E - 20 N 8000 8 B 12 1 222 35 E ~

25 N 9494 9 8 24 2 223 35 E - 30 N 8064 8 7 17 1 224 40 E - 25 s 7966 8 7 8 1 225 40 E " 20 s 7096 7 7 8 1 226 40 E - 15 s 8956 8 8 10 2 227 40 E - 10 s 9340 9 9 11 2 228 40 E - 5 s 8724 9 8 10 1 229 40 E - 0 N 7930 8 7 8 1 230 40 E - 5 N 8938 g 8 21 1 231 40 E - 10 N 7084 7 7 15 2 232 40 E - 15 N 7062 8 8 9 1 233 40 E - 20 N 8562 9 8 9 2 234 40 E - 25 N 8752 9 8 9 2 235 40 E - 30 N 7656 8 8 13 1 236 45 E - 25 s 8628 8 8 8 1 237 45 E - 20 s 8698 9 8 8 2 238 45 E - 15 s 7734 9 8 13 1 239 45 E - 10 s 9036 8 8 15 2 240 45 E - 5 s 8998 9 8 9 2 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 8

05/18/99 CIMARRON FACILITY SUB AREA nr 11 PHASE II SURFACE AFFECTED .. SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: S/N LUDLUM MICRO 'R' METER - MIN 19 111299 µr/hr 9 2 LUDLUM 2220, 11 UNSHIELDED 3 X 1/2" Nal DETECTOR 97264 CPM 7160 N/A CIMMARON SOIL Total U 4.0 10 COUNTER 4 11 X 4" X 16" Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: uJ . a ( ~~- DATE: S:-/f?-9' 7 3 MICROV MICRO LN GRID LOCATION DETECT R' R' O" ~ 6'

C.P.M. SURF 1 METER Total-U Th (Nat) 241 45 E - 0 N 8530 9 8 9 2 242 45 E - 5 N 7060 8 8 6 1 243 45 E - 10 N 6430 7 7 7 1 244 45 E . 15 N 7928 8 8 7 2 245 45 E - 20 N 8160 8 8 6 2 246 45 E - 25 N 8438 9 8 9 2 247 45 E - 30 N 7706 8 8 7 1 248 50 E - 25 s 8730 8 8 9 1 249 50 E - 20 s 8788 9 8 9 2 250 50 E - 15 s 8958 10 9 14 2 251 50 E - 10 s 9016 9 9 12 2 252 50 E - 5 s 9066 9 8 14 1 253 50 E - 0 N 8842 8 8 14 2 254 50 E - 5 N 7738 8 7 7 2 255 50 E - 10 N 7168 8 8 10 1 256 50 E - 15 N 8306 9 8 19 2 257 50 E - 20 N 8048 8 8 10 2 258 50 E - 25 N 8876 8 8 17 1 259 50 E - 30 N 7624 8 8 16 2 260 55 E - 25 s 8330 8 B 12 1 261 55 E - 20 $ 7898 8 8 7 2 262 55 E - 15 s 7778 8 8 14 1 263 55 E . 10 s 8842 8 8 14 2 264 55 E - 5 s 8356 9 9 16 2 265 55 E - 0 N 9510 9 9 21 1 266 55 E - 5 N 9130 10 10 14 2 267 55 E - 10 N 7638 8 8 11 1 268 55 E - 15 N 7930 8 8 13 1 269 55 E - 20 N 8760 8 8 20 1 270 55 E - 25 N 8222 9 8 11 2 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 9

05/18/99 CIMARRON FACILITY sua AREA "I" PHASE II SURFACE AFFECTED - SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: SIN LUDLUM MICRO 1R1 METER - M/N 19 111299 µr/hr 9 2 LUDLUM 2220 1 UNSHIELDED 3" X 1/2" Nal DETECTOR 97264 CPM 7160 N/A CIMMARON ~UIL Total u 4.0 10 COUNTER 4" X 4" X 16" Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: 1u~Cf- /4J~- DATE: ::;-,; 7-?Y 311 MICRO. MICRO LN GRID LOCATION DETECT R' R' 0" -6'

C.P.M, SURF 1 METER Total-U Th (Nat) 271 55 E - 30 N 7506 7 7 8 2 272 60 E - 25 s 8574 8 8 14 1 273 60 E - 20 s 8314 8 8 13 2 274 60 E - 15 s 8642 9 9 12 1 275 60 E - 10 s 8350 8 8 10 1 276 60 E - 5 s 8346 9 a 12 1 277 60 E ~

0 N 7944 8 9 14 1 278 60 E - 5 N 9642 9 9 11 2 279 60 E - 10 N 9664 9 9 33 2 280 60 E - 15 N 8256 8 8 11 1 281 60 E - 20 N 8080 9 8 28 1 282 60 E - 25 N 8182 7 8 9 1 283 60 E - 30 N 7936 8 8 6 1 284 65 E - 25 s 8340 8 8 9 2 285 65 E - 20 s 8316 a 7 12 1 286 65 E - 15 s 7996 8 8 10 1 287 65 E - 10 s 8068 8 8 14 1 288 65 E - 5 s 8606 8 8 12 1 289 65 E - 0 N 8472 9 9 12 2 290 65 E - 5 N 8276 8 8 8 2 291 65 E - 10 N 8622 8 8 10 2 292 65 E - 15 N 6812 8 8 9 1 293 65 E - 20 N 7516 8 8 7 1 294 85 E - 25 N 8042 7 7 5 2 295 65 E - 30 N 8340 8 8 16 2 296 70 E ~

25 s 8278 9 9 13 1 297 70 E - 20 s 8340 9 8 10 2 298 70 E - 15 s 8056 9 8 12 1 299 70 E - 10 s 8174 9 8 9 2 300 70 E - 5 s 8442 9 9 13 1 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 10

05/18/99 CIMARRON FACILITY SUB AREA "I" PHASE II SURFACE AFFECTED - SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: S/N LUDLUM MICRO 'R' METER - M/N 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X 1/2" Nal DETECTOR 97264 CPM 7160 NIA CIMMARON SOIL Total U 4.0 10 COUNTER 4" X 4" X 16 Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: iJ.a. /4,.,,~;..-- DATE: s:-1e~1r 311 MICR0 MICRO LN GRID LOCATION DETECT R' R' O" ~ 6'

C.P.M. SURF 1 METER Total-U Th (Nat) 301 70 E - 0 N 8814 9 9 11 1 302 70 E - 5 N 8304 8 9 8 2 303 70 E - 10 N 7106 8 8 8 2 304 70 E - 15 N 6870 8 8 13 1 305 70 E - 20 N 6888 8 8 12 1 306 70 E - 25 N 7978 8 8 7 2 307 70 E - 30 N 7468 7 7 23 2 308 75 E - 25 s 8182 9 8 7 2 309 75 E - 20 s 8458 9 9 5 2 310 75 E - 15 s 8540 8 8 11 2 311 75 E - 10 s 8506 9 8 13 1 312 75 E - 5 s 8998 9 9 7 2 313 75 E - 0 N 8430 8 8 11 1 314 75 E - 5 N 8718 9 8 13 2 315 75 E - 10 N 8648 8 8 10 1 316 75 E - 15 N 7958 8 8 14 2 317 75 E - 20 N 6968 7 7 9 1 318 75 E - 25 N 8154 8 8 6 2 319 75 E - 30 N 7238 8 8 6 1 320 80 E - 25 s 8186 9 8 9 1 321 80 E - 20 s 8416 8 8 9 2 322 80 E - 15 s 8384 8 8 7 2 323 80 E - 10 s 8340 g 9 g 2 324 80 E - 5 s 8516 9 8 13 2 325 80 E - 0 N 8390 8 8 6 2 326 80 E - 5 N 8576 9 8 12 2 327 80 E - 10 N 8570 8 8 12 2 328 80 E - 15 N 6490 8 8 15 1 329 80 E - 20 N 6748 7 7 11 1 330 80 E - 25 N 8620 8 8 8 1 C:\OFFICE\AREA\I\SOUPY\IDATSUPY. WB2 11

05/18/99 CIMARRON FACILITY SUB AREA "I" PHASE II SURFACE AFFECTED - SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: S/N LUDLUM MICRO 'R' METER - MIN 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 311 X 1/2" Nal DETECTOR 97264 CPM 7160 NIA ICIMMARON SOIL ITotal U 4.0 10 COUNTER 4" X 411 X 1611 Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: ~--a, /~-e*,. DATE: -.5--*/ 8'- r c; 3" MICRO MICRO LN GRID LOCATION DETECT R' R' O" -6'

C.P.M. SURF 1 METER Total-U Th (Nat) 331 80 E - 30 N 7898 8 8 10 2 332 85 E - 25 s 8280 8 8 10 2 333 85 E - 20 s 7938 8 7 9 2 334 85 E - 15 s 8348 8 8 10 2 335 85 E - 10 s 8370 8 8 8 2 336 85 E - 5 s 7972 8 8 11 1 337 85 E - 0 N 8128 8 8 '12 2 338 85 E ~

5 N 8318 8 8 9 2 339 85 E - 10 N 8342 8 8 9 2 340 85 E " 15 N 6686 7 7 11 1 341 85 E - 20 N 7022 7 7 9 1 342 85 E " 25 N 8390 8 8 8 2 343 85 E - 30 N 8976 9 9 14 2 344 90 E - 25 s 7998 7 8 13 1 345 90 E - 20 s 8070 8 8 12 1 346 90 E - 15 s 7912 8 8 8 2 347 90 E - 10 $ 8168 8 8 10 1 348 90 E - 5 s 8164 8 8 6 2 349 90 E - 0 N 8380 8 8 11 2 350 90 E - 5 N 8672 8 8 8 1 351 90 E - 10 N 8296 8 8 9 1 352 90 E - 15 N 7690 8 8 12 1 353 90 E - 20 N 6128 7 7 5 1 354 90 E - 25 N 8450 8 7 9 1 355 90 E - 30 N 7690 7 7 11 1 356 95 E - 25 s 8060 8 7 12 1 357 95 E - 20 $ 7640 8 8 9 1 358 95 E - 15 s 7968 8 8 11 2 359 95 E - 10 s 7860 8 8 8 2 360 95 E - 5 s 8094 8 8 12 2 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 12

05/18/99 I CIMARRON FACILITY SUB AREA "I" !?HASE II SURFACE AFFECTED - SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: S/N LUDLUM MICRO 'R' METER - MIN 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X 1/2" Nal DETECTOR 97264 CPM 7160 N/A ICIMMARON SOIL Total U 4.0 10 COUNTER 4" X 4n X 16 Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: -iJ_ 0. . J

~,,.,;

DATE: ._)-,.... /8 *-?r 3" MICRO' MICRO LN GRID LOCATION DETECT R' R' 0" -6'

C.P.M . SURF 1 METER Total-U Th {Nat) 361 95 E - 0 N 8020 8 8 12 1 362 95 E - 5 N 8670 8 8 12 2 363 95 E - 10 N 7804 8 8 12 1 364 95 E - 15 N 8176 8 8 13 2 365 95 E - 20 N 6876 7 7 16 1 366 95 E - 25 N 7070 7 7 18 1 367 95 E - 30 N 7996 8 8 1 '1 2 368 100 E - 25 s 7440 8 8 8 2 369 100 E - 20 s 7218 8 7 7 1

/,. ----- 370 100 E - 15 s 7592 8 7 7 1 371 100 E - 10 s 7758 8 7 10 1 372 100 E - 5 s 8092 8 8 10 1 373 100 E - 0 N 8270 8 8 10 2 374 100 E - 5 N 8076 8 8 7 1 375 100 E - 10 N 7456 7 7 10 1 376 100 E - 15 N 7178 7 7 11 1 377 100 E - 20 N 6687 7 7 9 1 378 100 E - 25 N 8518 8 8 17 2 379 100 E - 30 N 7496 8 8 10 1 380 105 E - 0 N 7690 9 8 5 1 381 105 E - 5 N 7220 7 7 11 1 382 105 E - 10 N 7420 8 7 14 1 383 105 E . 15 N 7958 8 8 10 1 384 105 E - 20 N 7170 8 8 9 1 385 105 E - 25 N 6434 7 7 7 1 386 105 E - 30 N 8040 9 8 23 1 387 110 E - 0 N 7348 7 7 7 1 388 110 E - 5 N 6748 7 7 12 1 389 110 E - 10 N 7150 7 7 5 1 390 110 E - 15 N 7312 7 7 8 1 C:\OFFICE\AREA\I\SOUPY\IDATSUPY .WB2 13

05/18/99 I CIMARRON FACILITY SUB AREA "I" PHASE II SURFACE AFFECTED ~ SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: S/N LUDLUM MICRO 'R' METER - MIN 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X 1/211 Nal DETECTOR 97264 CPM 7160 NIA CIMMARON SOIL Total U 4.0 10 COUNTER 4" X 4" X 16" Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: 1J~o_* ~ ___,

DATE: .5- 1s-* 99' 3" MICRO MICRO LN GRID LOCATION DETECT R' R' O" -6'

C.P.M. SURF 1 METER Total-U Th (Nat) 391 110 E - 20 N 7052 7 7 18 1 392 110 E - 25 N 6146 7 7 6 1 393 110 E - 30 N 7970 8 8 28 1 394 115 E - 0 N 6724 7 7 7 1 395 115 E - 5 N 6912 7 7 6 1 396 115 E - 10 N 7110 7 7 *11 1 397 115 E - 15 N 6850 7 7 10 1 398 115 E - 20 N 7460 7 6 12 1 399 115 E - 25 N 5872 6 6 6 1 400 115 E . 30 N 7324 7 6 11 1 401 120 E - 0 N 6336 7 7 12 1 402 120 E - 5 N 6382 7 7 8 1 403 120 E - 10 N 6684 7 7 4 1 404 120 E .. 15 N 6456 8 7 7 1 405 120 E - 20 N 6074 7 6 7 1 406 120 E - 25 N 6332 7 6 16 1 407 120 E - 30 N 7042 8 7 8 1 408 125 E - 0 N 6256 6 6 4 1 409 125 E - 5 N 6162 6 6 8 1 410 125 E - 10 N 6676 7 7 6 1 411 125 E - 15 N 6620 7 7 7 1 412 125 E - 20 N 7254 7 7 34 1 413 125 E - 25 N 5706 6 6 8 1 414 125 E - 30 N 7464 8 7 9 2 415 130 E - 0 N 6148 7 7 9 1 416 130 E - 5 N 6424 7 7 10 2 417 130 E - 10 N 6286 7 7 5 1 418 130 E - 15 N 6674 8 7 6 1 419 130 E - 20 N 6712 8 7 13 1 420 130 E - 25 N 5762 6 6 7 1 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 14

05/18/99 CIMARRON FACILITY SUB AREA 11 In :PHASE II SURFACE AFFECTED - SOUTH OF URANIUM PLANT YARD

~~~* 11 TS IN BACKGROUND MDA INSTRUMENTS: S/N LUDLUM MICRO 'R' METER - MIN 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X 1/211 Nal DETECTOR 97264 CPM 7160 NIA CIMMARON SOIL Total U 4.0 10 COUNTER 4" X 4" X 16" Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: ~)~()_ . .r

- DATE: .J-,,,. 1 t? -99 3 MICRO" MICRO LN GRID LOCATION DETECT R' R' O" - 6'

C.P.M. SURF 1 METER Total-U Th (Nat) 421 130 E - 30 N 6810 7 7 9 2 422 135 E - 0 N 6276 7 7 10 1 423 135 E - 5 N 6620 7 7 6 1 424 135 E - 10 N 6404 6 6 7 1 425 135 E - 15 N 6346 6 6 a 1 426 135 E - 20 N 7256 7 7 14 1 427 135 E - 25 N 7338 8 8 11 1 428 135 E - 30 N 6620 7 7 15 1 429 140 E - 0 N 6568 7 6 11 1 430 140 E - 5 N 6004 6 5 7 1 431 140 E - 10 N 5862 6 6 8 1 432 140 E - 15 N 5682 6 6 9 1 433 140 E - 20 N 5606 6 6 18 1 434 140 E - 25 N 6090 6 6 9 1 435 140 E - 30 N 6124 6 6 10 1 436 145 E - 0 N 5872 7 6 8 1 437 145 E - 5 N 5368 6 6 6 1 438 145 E - 10 N 5334 7 6 8 1 439 145 E - 15 N 5488 5 5 10 1 440 145 E - 20 N 5672 5 6 8 1 441 145 E - 25 N 5932 6 6 7 1 442 145 E - 30 N 6098 6 6 14 1 443 150 E - 0 N .5458 6 6 7 1 444 150 E - 5 N 4980 5 5 5 1 445 150 E - 10 N 5072 5 5 5 1 446 150 E - 15 N 5404 5 5 10 1 447 150 E - 20 N 5234 5 6 3 1 448 150 E - 25 N 5810 5 6 8 1 449 150 E - 30 N 6052 5 5 9 1 450 155 E - 0 N 5250 6 5 5 1 C:\OFFICE\AREA\I\SOUPY\IDATSUPY.WB2 15

05/18/99 CIMARRON FACILITY SUB AREA "I" PHASE II SURFACE AFFECTED

SOUTH OF URANIUM PLANT YARD RESULTS IN BACKGROUND MDA INSTRUMENTS: SIN LUDLUM MICRO 'R' METER - M/N 19 111299 µr/hr 9 2 LUDLUM 2220, UNSHIELDED 3" X 1/2" Nal DETECTOR 97264 CPM 7160 NIA CIMMARON t;UIL Total U 4.0 10 COUNTER 4" X 4 11 X 16" Nal DETECTOR pCi/G Th (Nat) 1.5 1 BACKGROUND NOT SUBTRACTED REVIEWED BY: -,.,J .. n. ~ -t..---1 DATE: s--I 1J *- 9 r 3" MICRO MICRO LN GRID LOCATION DETECT R' R' 0" -6'

C.P.M. SURF 1 METER Total-U Th (Nat) 451 155 E - 5 N 5074 5 6 7 1 452 155 E - 10 N 5206 5 6 5 1 453 155 E - 15 N 5218 5 5 6 1 454 155 E - 20 N 5546 5 6 12 1 455 155 E - 25 N 5462 6 5 8 1 456 155 E - 30 N 7330 8 8 17 1 C:\OFFICE\AREA\I\SOUPY\IDATSUPY .WB2 16

05/18/99 PHASE II SUB-AREA 11 I" SOUTH OF URANIUM PLANT CIMARRON SOIL COUNTER SURFACE TOTAL URANIUM SOIL SAMPLE RES ULTS SITE BACKGROUND OF 4 pCi/g NOT SUBTRACTED MARCH, 1999 URANIUM SAMPLE DATA FREQUENCY DISTRIBUTION 200 150 100 50 0

3 6 9 1215182124273033 pCi/g NUMBER OF SAMPLES 456 AVERAGE SAMPLE 10.4 MINIMUM SAMPLE 3.0 MAXIMUM SAMPLE 34.0 STANDARD DEVIATION 4.2 C:\OFFICE\AREA\I\ISUPGPYH.WB2 1

04/"14/99 PHASE If SUB-AREA II I" SOUTH OF URANIUM PLANT CIMARRON SOIL COUNTER SURFACE TOTAL THORIUM SOIL SAMPLE RESULTS SITE BACKGROUND OF 1.5 pCi/g NOT SUBTRACTED MARCH, 1999 THORIUM SAMPLE RESULTS FREQUENCY DISTRIBUTION 300 Cf)

UJ 250

_J CL

~ 200 -

<t:

Cl)

u. 150 0

0::

w 100 ca

~

=> 50 z

0 0 1 2 3 pCl/g NUMBER OF SAMPLES 456 AVERAGE SAMPLE 1.4 MINIMUM SAMPLE 1.0 MAXIMUM SAMPLE 2.0 STANDARD DEVIATION 0.5 C:\OFFICE\AREA\I\ISUPGPYH.WB2 1

05/18/99 PHASE II SUB-A.REA "I" SOUTH OF URANIUM PLANT MICRO-R METER READINGS AT SURFACE AFFECTED LUDLUM MODEL 19 5/N 111299 SURFACE SITE BACKGROUND OF 9 µR/hr NOT SUBTRACTED RESULTS IN µR/hr MARCH, 1999 MICRO "R" READINGS @ SURFACE FREQUENCY DISTRIBUTION 250 en

~ 200 0

<(

w 150 0:::

LL 0 100 0:::

., ---. .. w co

~ 50 z

0 5 6 7 8 9 10

µR/hr NUMBER OF READINGS 456 AVERAGE READING 8 MINIMUM READING 5 MAXIMUM READING 10 STANDARD DEVIATION 1

.1"- . . ,

C:\OFFICE\AREA\I\ISUPGPYH.WB2 1

06/23/99 PHASE II SUB-AREA 11 1'1 SOUTH OF URANIUM PLANT MICRO-R METER READINGS AT ONE METER ABOVE SURFACE LUDLUM MODEL 19 SIN 111299 AFFECTED SURFACE SITE BACKGROUND OF 9 µR/hr NOT SUBTRACTED RESULTS IN µR/hr MARCH, 1999 MICRO 'R' READINGS @ 1 METER FREQUENCY DISTRIBUTION 00 350 ...----~-~-......-----.-----.-----..----,

~ 300

~ 250

~ 200 LL O 150 ffi cc 100

? 50

=>

z 0 8 9 10 11 12 13

µR/hr NUMBER OF READINGS 456 AVERAGE READING 8 MINIMUM READING 5 MAXIMUM READING 10 STANDARD DEVIATION 1 C:\OFFICE\AREA\l\1SUPGPYH.WB2 1

04/01/99 PHASE II SUB-AREA "I" SOUTH OF URANIUM PLANT 3" Nal DETECTOR AFFECTED - SURFACE GROSS GAMMA READINGS IN CPM LUDLUM MODEL 2220 SIN 97264 (UNSHIELDED)

BACKGROUND AVERAGE: 7160 CPM MARCH, 1999 3" Nal DETECTOR READINGS FREQUENCY DISTRIBUTION

-250 ~ -- -----.----*-........-------.-------.------

(/)

~ 200 -+------+---------+-----+----+--

-0 j1j 150 -+------+-----+----+---+--

0::

-~

LL O0:::

100 --t--,-------~------i---

w cc 3 50 ...i.---+------

z 0 -+----+--

5000 6000 7000 8000 9000 9500 10000 I

CPM NUMBER OF READINGS 456 AVERAGE READING 7811 MINIMUM READING 4980 MAXIMUM READING 10624 STANDARD DEVIATION 965 C:\OFFICE\AREA\I\ISUPGPYH.WB2 1

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA "I 11 SOUTH OF URANIUM PLANT {AFFECTED) SURFACE n = pCilg TOTAL U Number n (n-N) jn-N)2 No. of Samples (x) : I 456 1 6 .0 -4.4 19.8 2 3.0 -7.4 55.5 COUNT TIME: 5 MINUTES 3 8.0 -2.4 6.0 4 6.0 -4.4 19.8 Sample Mean (N) = Sum(n) + (x) 5 8.0 -2.4 6.0 Sample Mean (N) : l 10.45 6 8.0 -2.4 6.0 7 5.0 -5.4 29.1 8 11.0 0.6 0.3 9 10.0 -0.4 0.2 10 11 .0 0.6 0.3 Standard Deviation (Sd) = SORT [(n-N)l + (X

1))

11 6.0 -4.4 19.8 12 11.0 0.6 0.3 13 6.0 -4.4 19.8 Standard Deviation: ~

14 7.0 -3.4 11.9 2 Std Deviations: [ ] ] [ ]

15 7.0 -3.4 11.9 Degree of Fr(l(!dom(df}.= (X)

1 Oat.a listed on Table B-1 16 8.0 -2.4 6.0 (df)

I 1.645 I 17 8.0 -2.4 6.0 18 6.0 -4.4 19.8 Area's Average Level (Aµ)= (N) + (df} x [(Sd)ISQRT(x)]

19 8.0 -2.4 6.0 20 7.0 -3.4 11.9 (Aµ)= ~ pCilgU TOTAL U 21 8.0 -2.4 8.0 GUIOELINEVALUJ!; pCi/gU TOTAL u 22 10.0 -0.4 0.2 Acceptable Level: pCi/gU TOTAL U 23 9 .0 -1.4 2.1 24 7.0 -3.4 11.9 25 7.0 -3.4 11.9 TABLE B

1 26 9.0 -1.4 2.1 F.ictors for Comparlslon of Survey Datu with Guldollno:s 27 7.0 -3.4 11.9 (df} 95o/. 97.5% (df) 95% 97.5%

28 10.0 *0,4 0.2 1 6.314 12.706 19 1,729 2.093 29 9.0 -1.4 2.1 2 2.92 4.303 20 1.725 2.086 30 9.0 .1.4 2.1 3 2.353 3.182 21 1.721 2.08 31 9.0 -1.4 2.1 4 2.132 2.776 22 1.717 2.074 32 13.0 2.6 6.5 5 2.015 2.571 23 1.714 2.069 33 11 .0 0.6 0.3 6 1.943 2.447 24 1.711 2.064 34 12.0 1.6 2.4 7 1.895 2.365 25 1.708 2.06 35 10.0 -0.4 0.2 8 1.86 2.306 26 1.706 2.056 36 7.0 -3.4 11.9 9 1.833 2.262 27 1.703 2.052 37 10.0 -0.4 0.2 10 1.812 2.228 .28 1.701 2.048 38 8.0 -2.4 6.0 11 1.796 2.201 29 1.699 2.045 39 9.0 -1.4 2.1 12 1.782 2.179 30 1.697 2.042 40 8.0 -2.4 6.0 13 1.771 2.16 40 1.684 2.021 41 9.0 -1.4 2.1 14 1.761 2.145 60 1.671 2 42 9.0 -1.4 2.1 15 1.753 2.131 120 1.658 1.98 43 9.0 -1.4 2.1 16 1.746 2.12 400 1.649 1.966 44 8.0 -2.4 6.0 17 1.74 2.11 Infinite 1.645 1.96 45 9.0 -1.4 2.1 18 1.734 2.101 46 12.0 1.6 2.4 47 9.0 -1.4 2.1 48 6.0 -4.4 19.8 For values of Degrees of Freedom not listed:

49 9.0 -1.4 2.1 lntl)rpolate between the;..:l:.:::ls;.;.;;te;.;:.d.:.;va:.:;lu~e:.=.:s.:..........._ __,,,~--,----,

50 11 .0 0.6 0.3 (dt} high va!ue(Z) INFINITE Is (B) 1.645 95%

473.0 513.4 (df) low Villue(Y) 400 Is (A) 1.649 95%

529.0 441.0 Desired value(df) (X) 455 Is calculated as follow:

577.0 1101.9 EXP[( {Ln(B)-Ln(A) ) + (Z-Y)) (X-Y) + Ln(A) ]

584.0 1570.6 Thll (df) value for (X} I 455 I 1.645 j 95% J 634.0 1481.6 503.0 466.4 PERFORMED BY: ~t;

~ I

J;l)i) DATE: 1- J , t/9 534.0 941.4 453.0 1203.4 55.0 112.7 o.o 0.0 0.0 0.0 0.0

0.0 REVIEWEDBY

"lJ . . °'~ ~ DATE~ '-/"'/...,72:

0.0 0.0 total 4765 8218.7 Sumln) Sum(n*N)' PAGE 1 OF6 A:\ISUPYCMU.WB2

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA 11 I'1 SOUTH OF URANIUM PLANT (AFFECTED) SURFACE n = pCi/g TOTAL U n = pCi/g TOTAL U Number n (n~N) (n~N)z Number n (n*N) {n*N) 2 51 11.0 0.55 0.30 101 11.0 0.55 0.30 52 8.0 -2.45 6.00 102 11.0 0.55 0.30 53 10.0 -0.45 0.20 103 8.0 -2.45 6.00 54 8.0 -2.45 6.00 104 14.0 3.55 12.61 55 11 .0 0.55 0.30 105 9.0 -1.4S 2.10 56 4.0 -6.45 41.60 106 13.0 2.55 6.50 57 10.0 ..().45 0.20 107 7.0 -3.45 11.90 58 7.0 -3.45 11.90 108 14.0 3.55 12.61 59 5.0 -5.45 29.70 109 9.0 -1.45 2.10 60 8.0 -2.45 6.00 110 8.0 -2.45 6.00 61 11 .0 0.55 0.30 111 8.0 ..2.45 6.00 62 '13.0 2.55 6.50 112 10.0 -0.45 0.20 63 12.0 1.55 2.40 113 10.0 ~0.45 0.20 64 9.0 -1.45 2.10 114 9.0 -1.45 2.10 65 9.0 -1.45 2.10 115 12.0 1.55 2.40 66 8.0 -2.45 6.00 116 12.0 1.55 2.40 67 14.0 3.55 12.61 117 10.0 -0.45 0.20 68 8.0 -2.45 6.00 118 10.0 -0.45 0.20 69 8.0 -2.45 6.00 119 14.0 3.55 12.61 70 8.0 -2.45 6.00 . 120 9.0 -1.45 2.10 71 9.0 -1.45 2.10 121 10.0 -0.45 0.20 72 9.0 -1.45 2.10 122 10.0 ..o.4s 0.20 73 9.0 -1.45 2.10 123 11.0 0.55 0.30 74 9.0 -1.45 2.10 124 12.0 1.55 2.40

, ~ ~.

75 10.0 -0.45 0.20 125 8.0 -2.45 6.00 76 6.0 -4.45 19.80 126 12.0 1.55 2.40 77 10.0 -0.45 0.20 127 10.0 -0.45 0.20 78 8.0 -2.45 6.00 128 6.0 -4.45 19. 80 79 12.0 1.55 2.40 129 11.0 0.55 0.30 80 25.0 14.55 211.72 130 8.0 -2.45 6.00 81 14.0 3.55 12.61 131 21.0 10.55 111.31 82 5.0 -5.45 29.70 132 20.0 9.55 91.21 83 8.0 -2.45 6.00 133 11.0 0.55 0.30 84 11.0 0.55 0.30 134 17.0 6.55 42.91 85 7.0 -3.45 11.90 135 9.0 -1.45 2.10 86 11.0 0.55 0.30 136 10.0 -0.45 0.20 87 10.0 -0.45 0.20 137 9.0 -1.45 2.10 88 8.0 -2.45 6.00 138 8.0 *2.45 6.00 89 8.0 -2.45 6.00 139 10.0 -0.45 0.20 90 11.0 0.55 0.30 140 11 .0 0.55 0.30 91 8.0 -2.45 6.00 141 10.0 -0.45 0.20 92 7.0 -3.45 11.90 142 8.0 -2.45 6.00 93 9.0 -1.45 2.10 143 12.0 1.55 2.40 94 10.0 -0.45 0.20 144 14.0 3.55 12.61 95 11.0 0.55 0.30 145 8.0 -2.45 6.00 96 11.0 0.55 0.30 146 12.0 1.55 2.40 97 7.0 -3.45 11.90 147 9.0 -1.45 2.10 98 8.0 -2.45 6.00 148 6.0 -4.45 19.80 99 10.0 -0.45 0.20 149 8.0 -2.45 6,00 100 10.0 -0.45 0.20 150 10.0 -0.45 0.20 473.0 513.4 529.0 441.0 Sum(n) Sum(n-N) 2 Sum(n) Sum(n~N) 2 PAGE 2 OF 6 A:\ISUPYCMU.WB2

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA "I1' SOUTH OF URANIUM PLANT {AFFECTED) SURFACE 0 = p c*tI ;J TOTAL U n = pCINJ TOTAL U Number n (n-N) (n~N) 2 Number n ln-Nl ln-N)2 151 9.0 -1.45 2.10 201 7.0 -3.45 11.90 152 8.0 -2.45 6.00 202 15.0 4.55 20.71 153 9.0 -1.45 2.10 203 6.0 -4.45 19.80 154 9.0 -1.45 2.10 204 7.0 -3.45 11.90 155 14,0 3.55 12.61 205 30.0 19.55 382.22 156 18,0 7.55 57.01 206 11.0 0.55 0.30 157 10.0 ~0.45 0.20 207 9.0 -1.45 2.10 158 25.0 14.55 211.72 208 14.0 3.55 12.61 159 18.0 7.55 57.01 209 18.0 7.55 57.01 160 5.0 -5.45 29.70 210 22.0 11.55 133.41 161 7.0 -3.45 11.90 211 23.0 12.55 157.51 162 9.0 -1.45 2.10 212 18.0 7.55 57.01 163 7.0 -3.45 11.90 213 8.0 -2.45 6.00 164 8.0 -2.45 6.00 214 10.0 -0.45 0.20 165 7.0 -3.45 11.90 215 10.0 -0.45 0.20 166 11 .0 0.56 0.30 216 4.0 -6.45 41.60 167 17.0 6.55 42.91 217 20.0 9.55 91.21 168 10.0 -0.45 0.20 218 12.0 1.55 2.40 169 11.0 0.55 0.30 219 14.0 3.55 1 ;2.61 170 20.0 9.55 91.21 220 6.0 -4.45 19.80 171 17.0 6.55 42.91 221 12.0 1.55 2.40 172 15.0 4.55 20.71 222 24.0 13.55 183.61 173 11.0 0.55 0.30 223 17.0 6.55 42.91 174 10.0 -0.45 0.20 224 8.0 -2.45 6.00 175 4.0 -6.45 41.60 225 RO -2.45 6.00 176 8.0 -2.45 6.00 226 10.0 -0.45 0.20 177 6.0 -4.45 19.80 227 11.0 0.55 0.30 178 11.0 0.55 0.30 228 10.0 -0.45 0.20 179 8.0 ..2.45 6.00 229 8.0 -2.45 6.00 180 17.0 6.55 42.91 230 21.0 10.55 111.31 181 11.0 0.55 0.30 231 15.0 4.55 20.71 182 12.0 1.55 2.40 232 9.0 -1.45 2.10 183 9.0 -1.45 2.10 233 9.0 -1.45 2.10 184 9.0 -1.45 2.10 234 9.0 ~1.45 2.10 185 12.0 1.55 2.40 235 13.0 2.55 6.50 186 12.0 1.55 2.40 236 8.0 *2.45 6.00 187 10.0 -0.45 0.20 237 8.0 -2.45 6.00 188 7.0 -3.45 11.90 238 13.0 2.55 6.50 189 6.0 -4.45 19.80 239 15.0 4.55 20.71 190 10.0 -0.45 0.20 240 9.0 -1.45 2.10 191 14.0 3.55 12.61 241 9.0 -1.45 2.10 192 9.0 -1.45 2.10 242 6.0 -4.45 19.80 193 10.0 -0.45 0.20 243 7.0 -3.45 11.90 194 15.0 4.55 20.71 244 7.0 -3.45 11.90 195 12.0 1.55 2.40 245 6.0 4.45 19.80 196 22.0 11.55 133.41 246 9.0 -1.45 2.10 197 10.0 -0.46 0.20 247 7.0 -3.45 11.90 198 22.0 11.55* 133.41 248 9.0 -1.45 2.10 199 13.0 2.55 6.50 249 9.0 ..1.45 2.10 200 13.0 2.55 6.50 250 14.0 3.55 12.61 577.0 1101.9 584.0 1570.6 Sum(n} Sum(n-N)2 Sum(n) Sum(n-N)2 PAGE30F6 A:\!SUPYCMU.WB2

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA 11 ! 11 SOUTH OF URANIUM PLANT (AFFECTED) SURFACE n = P' 1 ~

C'/ TOTAL U c*1 n = P' I~ TOTAL U Number n (n*N) (n*N) 2 Number n (n*N) (n-N)2 251 12.0 1.55 2.40 301 11.0 0.55 0.30 252 14.0 3.55 12.61 302 8.0 -2.45 6.00 253 14.0 3.55 12.61 303 8.0 -2.45 6.00 254 7.0 ..3_45 11.90 304 13.0 2.55 6.50 255 10.0 -0.45 0.20 305 12.0 1.55 2.40 256 19.0 8.55 73.11 306 7.0 -3.45 11.90 257 10.0 -0.45 0.20 307 23.0 12.55 157.51 258 17.0 6.55 42.91 308 7.0 -3.45 11.90 259 16.0 5.55 30.81 309 5.0 -5.45 29.70 260 12.0 1.55 2.40 310 11.0 0.55 0.30 261 7.0 -3.45 11.90 311 13.0 2.55 6.50 262 14.0 3.55 12.61 312 7.0 -3.45 11.90 263 14.0 3.55 12.61 313 11.0 0.55 0.30 264 16.0 5.55 30.81 314 13.0 2.55 6.50 265 21.0 10.55 111.31 315 10.0 -0.45 0.20 266 14.0 3.55 12.61 316 14.0 3.55 12.61 267 11.0 0.55 0.30 317 9.0 -1.45 2.10 268 13.0 2.55 6.50 318 6.0 -4.45 19.80 269 20.0 9.55 91.21 319 6.0 -4.45 19.80 270 11.0 0.55 0.30 320 9.0 -1.45 2.10 271 8.0 -2.45 6.00 321 9.0 -1.45 2.10 272 14.0 3.55 12.61 322 7.0 -3.45 11.90 273 13.0 2.55 6.50 323 9.0 -1.45 2.10 274 12.0 1.55 2.40 324 13.0 2.55 6.50 275 10.0 -0.45 0.20 325 6.0 -4.45 19.80 276 12.0 1.55 2.40 326 12.0 1.55 2.40 277 14.0 3.55 12.61 327 12.0 1.55 2.40 278 11.0 0.55 0.30 328 15.0 4.55 20.71 279 33.0 22.55 508.52 329 11.0 0.55 0.30 280 11.0 0.55 0.30 330 8.0 -2.45 6.00 281 28.0 17.55 308.02 331 10.0 -0.45 0.20 282 9.0 -1.45 2.10 332 10.0 -0.45 0.20 283 6.0 -4.45 19.80 333 9.0 -1.45 2.10 284 9.0 -1.45 2.10 334 10.0 -0.45 0.20 285 12.0 1.55 2.40 335 8.0 -2.45 6.00 286 10.0 -0.45 0.20 336 11.0 0.55 0.30 287 14.0 3.55 12.61 337 12.0 1.55 2.40 288 12.0 1.55 2.40 338 9.0 -1.45 2.10 289 12.0 1.55 2.40 339 9.0 -1.45 2.10 290 8.0 -2.4S 6.00 340 11 .0 0.55 0.30 291 10.0 -0.45 0.20 341 9.0 -1.45 2.10 292 9.0 -1.45 2.10 342 8.0 -2.45 6.00 293 1.0 -3.45 11.90 343 14.0 3.55 12.61 294 5.0 -5.45 29.70 344 13.0 2.55 6.50 295 16.0 5.55 30.81 345 12.0 1.55 2.40 296 13.0 2.55 6.50 346 8.0 -2.45 6.00 297 10.0 -0.45 0.20 347 10.0 -0.45 0.20 298 12.0 1.55 2.40 348 6.0 -4.45 19.80 299 9.0 -1.45 2.10 349 11.0 0.55 0.30 300 13.0 2.55 6.50 350 8.0 -2.45 6.00 634.0 1481.6 503.0 466.4 Sum(n) Sum(n*N) 2 Sum(n) Sum(n-N)2 PAGE40F6 A:\ISUPYCMU.WB2

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA 11 1 11 SOUTH OF URANIUM PLANT (AFFECTED) SURFACE n = pCi/g TOTAL u n = p c*,I ;J TOTAL u Number n (n*N) (n*N) 1 Number n (n-N) (n-N) 2 351 9.0 0.00 0.00 401 12.0 1.55 2.40 352 12.0 1.55 2.40 402 8.0 -2.45 6.00 353 5.0 -5.45 29.70 403 4.0 -6.45 41.60 354 9.0 -1.45 2.10 404 7.0 -3.45 11.90 355 11 .0 0.55 0.30 405 7.0 --3.45 11.90 356 12.0 1.55 2.40 406 16.0 5.55 30.81 357 9.0 -1.45 2.10 407 8.0 -2.45 6.00 358 11 .0 0.55 0.30 408 4.0 -6.45 41.60 359 8-0 -2.45 6.00 409 8.0 -2.45 6.00 360 12.0 1.55 2.40 410. 6.0 -4.45 19.80 361 12.0 1.55 2,40 411 7.0 -3.45 11.90 362 12.0 1.55 2.40 412 34.0 23.55 554.62 363 12.0 1.55 2.40 413 8,0 -2.45 6.00 364 13.0 2.55 6.50 414 9.0 -1.45 2.10 365 16.0 5.55 30.81 415 9.0 -1.45 2.10 366 18.0 7.55 57.01 416 10.0 -0.45 0.20 367 11 .0 0.55 0.30 417 5.0 -5.45 29.70 368 8.0 -2.45 6.00 418 6.0 -4.45 19.ao*-

369 7.0 -3.45 11.90 419 13.0 2.55 6.50 370 7.0 -3.45 11.90 420 7.0 -3.45 11.90 371 10.0 -0.45 0.20 421 9.0 -1.45 2.10 372 10.0 -0.45 0.20 422 10.0 -0.45 0.20 373 10.0 -0.45 0.20 423 6.0 -4.45 19.80 374 7.0 -3.45 11.90 424 7.0 -3.45 11.90 375 10.0 -0.45 0.20 425 8.0 -2.45 6.00 376 11.0 0.55 0.30 426 14.0 3.55 12.61 377 9.0 *-1.45 2.10 427 11.0 0.55 0.30 378 17.0 6.55 42.91 428 15.0 4.55 20.71 379 10.0 -0.45 0.20 429 11.0 0.55 0.30 380 5.0 -5.45 29.70 430 7.0 -3.45 11.90 381 11 .0 0.55 0.30 431 8.0 -2.45 6.00 382 14.0 3.65 12.61 432 9.0 -1.45 2.10 383 10.0 -0.45 0.20 433 18.0 7.55 57.01 384 9.0 -1.45 2.10 434 9.0 -1.45 2.10 385 7.0 -3.45 11.90 435 10.0 -0.45 0.20 386 23.0 12.55 157.51 436 8.0 -2.45 6.00 387 7.0 -3.45 11.90 437 6.0 -4.45 19.80 388 12.0 1.55 2.40 438 8,0 -2.45 6.00 389 5.0 -5.45 29.70 439 10.0 -0.45 0.20 390 8.0 -2.45 6.00 440 8.0 *2,45 6.00 391 18.0 7.55 67.01 441 7.0 -3.45 11.90 392 6.0 -4.45 19.80 442 14.0 3.55 12.61 393 28.0 17.55 308.02 443 7.0 -3.45 11.90 394 7.0 -3.45 11.90 444 5.0 -5.45 29.70 395 6.0 -4.45 19.80 445 5.0 -5.45 29.70 396 11.0 0.55 0.30 446 10.0 -0.45 0.20 397 10.0 -0.45 0.20 447 3.0 -7.45 55.50 398 12.0 1.55 2.40 448 8.0 -2.45 6.00 399 6.0 -4.45 19.80 449 9.0 -1.45 2.10 400 11.0 0.55 0.30 450 5.0 -5.45 29.70 534.0 941.4 453.0 1203.4 Sum(n) Sum(n-N) 2 Sum{n) Sum(n*NF PAGE 50F 6 A:\l$UPYCMU.WB2

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA "I 11 SOUTH OF URANIUM PLANT (AFFECTED) SURFACE n = pCi/~ TOTAL U n = pCi/g TOTAL U Number n (n-N) {n~N) 2 Number n (n~N) (n-N) 2 451 7.0 -3.45 11.90 501 0.0 0.00 0.00 452 5,0 -5.45 29.70 502 0.0 o.oo 0.00 453 6.0 -4.45 19.80 503 0.0 0.00 0.00 454 12.0 1.55 2.40 504 0.0 0.00 0.00 455 8.0 -2.45 6.00 505 0.0 0.00 0.00 456 17.0 6.55 42.91 506 0.0 0.00 0.00 457 0.0 0.00 0.00 507 0.0 0.00 0.00 458 0,0 0.00 0.00 508 0.0 *o.oo 0.00 459 0,0 0.00 0.00 509 0.0 0.00 0.00 460 0.0 0.00 0.00 510 0.0 0.00 0.00 461 0.0 0.00 0.00 511 0,0 0.00 0.00 462 0.0 0.00 0.00 512 0.0 0.00 0.00 463 0.0 o.oo 0.00 513 0.0 0.00 0.00 464 0.0 0.00 0.00 514 0.0 0.00 0.00 465 0.0 0.00 0.00 515 0.0 0.00 0.00 466 0,0 0.00 0.00 516 0.0 0.00 0.00 467 0.0 o.oo 0.00 517 0.0 0.00 0.00 468 0.0 0.00 0.00 518 0.0 0.00 0.00 469 0.0 0.00 0.00 519 0.0 0.00 0.00 470 0.0 0.00 0.00 520 0.0 0.00 0.00 471 0.0 0.00 0.00 521 0.0 0.00 0.00 472 0.0 0.00 0.00 522 0.0 0.00 0.00 473 0.0 0.00 0.00 523 0.0 o.oo 0.00 474 0.0 0.00 0.00 524 0.0 0.00 0.00 475 0.0 0.00 0.00 525 0.0 o.oo 0.00 476 0.0 0.00 0.00 526 0.0 0.00 0.00 477 0.0 0.00 0.00 527 0.0 0.00 0.00 478 0.0 0.00 0.00 528 0.0 0.00 0.00 479 0.0 0.00 0.00 529 0.0 0.00 0.00 480 o.o 0.00 0.00 530 0.0 0.00 o.oo 481 0.0 0.00 0.00 531 0.0 0.00 0.00 482 0.0 0.00 0.00 532 0.0 0.00 0.00 483 0.0 0.00 0.00 533 0.0 0.00 0.00 484 0.0 0.00 0.00 534 0.0 o.oo 0.00 485 0.0 0.00 0.00 535 0.0 0.00 0.00 486 0.0 0.00 0.00 536 0.0 0.00 0.00 487 0.0 0.00 0.00 537 0.0 0.00 0.00 488 0.0 0.00 0.00 538 0.0 0.00 0.00 489 0.0 0.00 0.00 539 0.0 0.00 0.00 490 0.0 0.00 0.00 540 0.0 0.00 0.00 491 0.0 0.00 0.00 541 0.0 0.00 0.00 492 0.0 0.00 0.00 542 0.0 0.00 0.00 493 0.0 0.00 0.00 543 0.0 0.00 0.00 494 0.0 0.00 0.00 544 0.0 0.00 0.00 495 0.0 0.00 0.00 545 0.0 0.00 0.00 496 0.0 0.00 0.00 546 0.0 0.00 0.00 497 0.0 0.00 0.00 547 0.0 0.00 0.00 498 0.0 0.00 0.00 548 0.0 0.00 0.00 499 0.0 0.00 0.00 549 0.0 0.00 0.00 500 0.0 0.00 0.00 550 0.0 0.00 0.00 55.0 112.7 0.0 0.0 Sum(n) Sum(n~N)2 Sum(n) Sum(n-N)2 PAGE 6 OF6 A:\ISUPYCMU.WB2

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA 0 I" SOUTH OF URANIUM PLANT (AFFECTED) SURFACE n = oCi/2 Th (NAT)

Number n (n-N) (n-N)1 No. of Samples (x) : I 456 1 2.0 0.64 o.40 2 1.0 -0.36 0.13 COUNT TIME: 5 MINUTES 3 2.0 0.64 0.40 4 2.0 0.64 0.40 Sample Mean (N) = Snm(n) + (x) 5 1.0 -0.36 0.13 Sample Mean (N) : I 1.36 I 6 1.0 -0.36 0.13 7 1.0 -0.36 0.13 8 1.0 -0.36 0.13 9 1.0 -0.36 0.13 10 1.0 -0.36 0.13 Standard Deviation (Sd) =SQRT [(n-N)2 + (x - l)J 11 1.0 -0.36 0.13 12 1.0 -0.36 0.13 13 1.0 -0.36 0.13 Standard De¥iatio11: ~

14 1.0 -0.36 0.13 2 Std Deviations: ~

1S 1.0 -0.36 0.13 Degree of Freedom(d1).= (x) - 1 Data listed on Table B-1 16 1.0 -0.36 0.13 (di)= I 1.645 I 17 i.O -0.36 0.13 18 2.0 0.64 o.40 Area's Average Level (Aµ) = (N) + (df) x {(Sd)/sqrt(x))

19 1.0 -0.36 0.13 20 1.0 -0.36 0.13 (Aµ)= §48.40 pCi/gTh (NAT) 21 1.0 -0.36 0.13 GUIDELINE. VALUE: 10 pCi/gTh (NAT) 22 1.0 -0.36 0.13 Acceptable Lenl: 4.0 pCi/gTh (NAT) 23 1.0 -0.36 0.13 {25% oi,* GUII>ELlNE PLUS BACJ<CROUND) 24 1.0 -0.36 0.13 25 1.0 -0.36 0.13 TABLE B-1 26 2.0 0.64 0.40 Factors for Comparision of Survey Data with Guidelines 27 2.0 0.64 0.40 (di) 95% 97.5% (di) 95% 97.5%

28 1.0 -0.36 0.13 1 6.314 12.706 19 l.729 2.093 29 1.0 ..0.36 0.13 2 2.92 4.303 20 1.725 2.086 30 1.0 -0.36 0.13 3 2.353 3.182 21 1.721 2.08 31 2.0 0.64 0.40 4 2.132 2.776 22 l.717 2.074 32 1.0 -0.36 0.13 5 2.015 2.571 23 1.714 2.069 33 1.0 -0.36 0.13 6 1.943 2.447 24 1.711 2.064 34 1.0 -0.36 0.13 7 1.895 2.365 25 1.708 2.06 35 1.0 -0.36 0.13 8 1.86 2.306 26 1.706 2.056 36 1.0 -0.36 0.13 9 1.833 2.262 27 1.703 2.052 37 1.0 -0.36 0.13 10 1.812 2.228 28 l.701 '.2.048 38 1.0 -0.36 0.13 11 1.796 2.201 29 1.699 2.045 39 1.0 -0.36 0.13 12 1.782 2.179 30 1,697 2.042 40 1.0 *0.36 0.13 13 1.771 2.16 40 1.684 l.021 41 1.0 -0.36 0.13 14 1.761 2.145 60 1.671 2 42 1.0 -0.36 0.13 15 1.753 2.131 120 1.658 l.98 43 1.0 -0.36 0.13 16 1.746 2.12 400 1.649 1.966 44 1.0 -0.36 0.13 17 1.74 2.11 Infinite 1.645 1.96 45 1.0 -0.36 0.13 18 1.734 2.101 46 1.0 -0.36 0.13 47 2.0 0.64 0.40 48 1.0 -0.36 0.13 For values of Degrees of Freedom not listed:

49 1.0 -0.36 0.13 Interpolate between th.,.,c_,,,li=st,,,...ed=va,,,.,I,....uc...,s_."="'"--,.---,-,-,.,,...-.,---,---,--,----,

50 1.0 -0.36 0.13 (df) high value(Z) INFINITE is (B) 1.645 95%

(df) low valut(Y) 400 is (A) 1.649 95%

70 12.06.5 Desired vaJue(dl) (X) 455 is calculated as follow:

80 14.784 EXP[( (Ln(B) - Ln(A) } ...., (Z - ¥) ) (X - Y) + Ln(A) ]

68 11.521 The (dl) value for (X) I 455 I 1.645 I 95%

74 13.152 73 12.880 81 15.056 59 53 6

9.073 7.442 0.795 PERFORMED BY: 1ZZ,.,17 j:./ak_, DATE:

0 0.000 0 REVIEWED BY: DATE: '-f-( -y 1 622.0 105.570 Sum(n) Sum(n-N)2 Pagel of6 C:\OFFICE\AREA\I\ISUPYCMT. WB2

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA 11 I 11 SOUTH OF URANIUM PLANT (AFFECTED) SURFACE n""P'Ci/*g Th (NAT) n=p Ci/ g Th (NAT)

Number n (n-N) (n-N):2 Number n (n-N) (n-N)2 51 1.0 -0.36 0.13 101 2.0 0.64 0.40 52 1.0 -0.36 0.13 102 2.0 0.64 OAO 53 1.0 ~0.36 0.13 103 1.0 -0.36 0.13 54 1.0 -0.36 0.13 104 2.0 0.64 0.40 55 1.0 --0.36 0.13 105 2.0 0.64 0.40 56 2.0 0.64 0.40 106 2.0 0.64 0.40 57 1.0 -0.36 0.13 107 2.0 0.64 0.40 58 1.0 -0.36 0.13 108 1.0 -0.36 0.13 59 1.0 -0.36 0.13 109 1.0 ~0.36 0.13 60 1.0 -0.36 0.13 110 1.0 -0.36 0.13 61 1.0 -0.36 0.13 111 1.0 -0.36 0.13 62 1.0 -0.36 0.13 112 1.0 -0.36 0.13 63 1.0 -0.36 0.13 113 1.0 -0.36 0.13 64 1.0 -0.36 0.13 114 1.0 -0.36 0.13 65 2.0 0,64 0-40 115 2.0 0.64 0.40 66 1.0 -0.36 0.13 116 2.0 0.64 0.40 67 2.0 0.64 0.40 117 1.0 -0.36 0.13 68 1.0 -0.36 0.13 118 2.0 0.64 0.40 69 1.0 ..0.36 0.13 119 1.0 -0.36 0.13 70 2.0 0.64 0.40 120 2.0 0.64 0.40 71 2.0 0.64 0.40 121 2.0 0.64 0.40 72 2.0 0.64 0.40 122 2.0 0.64 0.40 73 1.0 -0.36 0.13 123 2.0 0.64 MO 14 1.0 -0.36 0.13 124 2.0 0.64 o.40 75 1.0 -0.36 0.13 125 1.0 -0.36 0.13 76 1.0 -0.36 0.13 126 2.0 0.64 0.40 77 2.0 0.64 0.40 127 2.0 0.64 Q.40 78 2.0 0.64 0.40 128 2.0 0.64 o.40 79 2.0 0.64 0.40 129 1.0 -0.36 0.13 80 1.0 -0.36 0.13 130 1.0 -0.36 0.13 81 2.0 0.64 0.40 131 1.0 -0.36 0.13 82 2.0 0.64 0.40 132 2.0 0.64 0.40 83 1.0 -0.36 0.13 133 1.0 -0.36 0.13 84 2.0 0.64 0.40 134 2.0 0.64 0.40 85 2.0 0.64 0-40 135 2.0 0.64 0.40 86 2.0 0.64 o.40 136 2.0 0.64 o.40 87 1.0 ~0.36 0.13 137 2.0 0.64 0.40 88 1.0 -0.36 0.13 138 2.0 0.64 0.40 89 1.0 -0.36 0.13 139 1.0 -0.36 0.13 90 1.0 -0.36 0.13 140 2.0 0.64 0.40 91 2.0 0.64 0.40 141 2.0 0.64 0.40 92 1.0 -0.36 0.13 142 2.0 0.64 0.40 93 2.0 0.64 0.40 143 1.0 -0.36 0.13 94 1.0 -0.36 0.13 144 2.0 0.64 0.40 95 1.0 .o.36 0.13 145 2.0 0.64 0.40 96 .,2.0 0.64 0.40 146 2.0 0.64 0.40 97 2.0 0.64 Q.40 147 1.0 -0.36 0.13 98 2.0 0.64 0.40 148 1.0 -0.36 0.13 99 2.0 0.64 0.40 149 1.0 -0.36 0.13 100 1.0 -0.36 0.13 150 2.0 0.64 0.40 70 12.065 80 14.784 Sum(n) Sum(n-N)2 Sum(n) Sum(n-N) 1 Page 2 of 6 C:\OFFICE\AREA\I\ISUPYCMT.WB2

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA 11 I 11 SOUTH OF URANIUM PLANT {AFFECTED) SURFACE n=p C'/J'g Th (NAT) n=p,Ci/'g Th (N A T)

Number n (n-N) (n-N)l Number n (n-N) (n-N)2 151 2.0 0.64 0.40 201 2.0 0.64 0.40 152 2.0 0.64 0.40 202 2.0 0.64 0.40 153 1.0 -0.36 0.13 203 1.0 -0.36 0.13 154 1.0 -0.36 0.13 204 1.0 -0.36 0.13 155 1.0 -0.36 0.13 205 1.0 -0.36 0.13 1S6 1.0 -0.36 0.13 206 2.0 0.64 0.40 157 1.0 -0.36 0.13 207 1.0 -0.36 0.13 158 2.0 0.64 0.40 208 1.0 -0.36 0.13 159 1.0 --0.36 0.13 209 1.0 -0.36 0.13 160 1.0 -0.36 0.13 210 2.0 0.64 0.40 161 1.0 -0.36 0.13 211 1.0 -0.36 0.13 162 1.0 -0.36 0.13 212 1.0 -0.36 0.13 163 1.0 -0.36 0.13 213 2.0 0.64 0.40 164 2.0 0.64 0.40 214 2.0 0.64 0.40 165 2.0 o.64 0.40 215 2.0 0.64 0.40 166 1.0 -0.36 0.13 216 1.0 --0.36 0.13 167 1.0 -0.36 0.13 217 2.0 0.64 0.40 168 2.0 0.64 0.40 218 2.0 0.64 0.40 169 1.0 -0.36 0.13 219 1.0 -0.36 0.13 170 2.0 0.64 0.40 220 1.0 --0.36 0.13 171 1.0 -0.36 0.13 221 1.0 -0.36 0.13 172 1.0 .o.36 0.13 222 2.0 0.64 0.40 173 1.0 -0.36 0.13 223 1.0 -0.36 0.13 174 2.0 0.64 Q.40 224 1.0 -0.36 0.13 175 2.0 0.64 0.40 225 1.0 -0.36 0.13 176 2.0 0.64 0.40 226 2.0 0.64 0.40 177 2.0 0.64 0.40 2Z1 2.0 0.64 0.40 178 1.0 -0.36 0,13 228 1.0 -0.36 0.13 179 1.0 -0.36 0.13 229 1.0 -0.36 0.13 180 1.0 -0.36 0.13 230 1.0 -0.36 0.13 181 1.0 --0.36 0.13 231 2.0 0.64 o.40 182 1.0 -0.36 0.13 232 1.0 -0.36 0.13 183 1.0 -0,36 0.13 233 2.0 0.64 Q.40 184 1.0 -0.36 0.13 234 2.0 0.64 0.40 185 1.0 *0.36 0.13 235 1.0 -0.36 0.13 186 2.0 0.64 0.40 236 1.0 -0.36 0.13 187 1.0 -0.36 0.13 237 2.0 0.64 0.40 188 1.0 -0.36 0.13 238 1.0 -0.36 0.13 189 2.0 0.64 0.40 239 2.0 0.64 0.40 190 2.0 0.64 0.40 240 2.0 0.64 0.40 191 1.0 -0.36 0.13 241 2.0 0.64 0.40 192 1.0 -0.36 0.13 242 1.0 -0.36 0.13 193 2.0 0.64 0.40 243 1.0 -0.36 0.13 194 1.0 -0.36 0.13 244 2.0 0.64 0.40 195 1.0 -0.36 0.13 245 2.0 0.64 0.40 196 2.0 0.64 0.40 246 2.0 0.64 0.40 197 2.0 0.64 0.40 247 1.0 -0.36 0.13 198 2.0 0.64 0.40 248 1.0 *0,36 0.13 199 1.0 -0.36 0.13 249 2.0 0.64 0.40 200 1.0 -0.36 0.13 250 2.0 0.64 0.40 68 11.521 74 13.152 Sum(n) Sum(n-N)2 Sum(n) Sum(n*N)l Page 3 of 6 C:\OFFICE\AREA\I\ISUPYCMT.W82

04/01/99 CIMARRON CORPORATION "CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA "I" SOUTH OF URANIUM PLANT (AFFECTED) SURFACE n = pCi/e Th (NAT) n=p Ci/'g Th (NA T)

Number n (n-N) (D-N)l Number n (n-N) (n-N):i 251 2.0 0.64 0.40 301 1.0 -0.36 0.13 252 1.0 -0.36 0.13 302 2.0 0.64 o.40 253 2.0 0.64 0.40 303 2.0 0.64 0.40 254 2.0 0.64 0.40 304 1.0 -0.36 0.13 255 1.0 -0.36 0.13 305 1.0 -0.36 0.13 256 2.0 0.64 0.40 306 2.0 0.64 0.40 257 2.0 0.64 0.40 307 2.0 0.64 0.40 258 1.0 -0.36 0.13 308 2.0 0.64 0.40 259 2.0 0.64 0.40 309 2 .0 0.64 0.40 260 1.0 -0.36 0.13 310 2.0 0.64 o.40 261 2.0 0.64 0.40 311 1.0 -0.36 0.13 262 1.0 -0.36 0.13 312 2.0 0.64 0.40 263 2.0 0.64 0.40 313 1.0 -0.36 0.13 264 2.0 0.64 0.40 314 2.0 0.64 0,40 265 1.0 -0.36 0.13 315 1.0 -0.36 0.13 266 2.0 0.64 0.40 316 2.0 0.64 0.40 267 1.0 -0.36 0.13 317 1.0 -0.36 0.13 268 1.0 -0.36 0,13 318 2.0 0.64 0.40 269 1.0 -0.36 0.13 319 1.0 -0.36 0.13 270 2.0 0.64 0.40 320 1.0 -0.36 0.13 271 2.0 0.64 0.40 321 2.0 0.64 0.40 272 1.0 ..().36 0.13 322 2.0 0.64 0.40 273 2.0 0.64 0.40 323 2.0 0.64 0.40 274 *1.0 -0.36 0.13 324 2.0 0.64 o.40 275 1.0 -0.36 0.13 325 2.0 0.64 0.40 276 1.0 -0.36 0,13 326 2.0 0.64 0.40 277 1.0 -0.36 0.13 327 2.0 0.64 0.40 278 2.0 0.64 0.40 328 1.0 -0.36 0.13 279 2.0 0.64 0.40 329 1.0 -0.36 0.13 280 1.0 -0.36 0.13 330 1.0 -0.36 0.13 281 1.0 -0.36 0.13 331 2.0 0.64 0.40 282 1.0 -0.36 0.13 332 2.0 0.64 0.40 283 1.0 -0.36 0.13 333 2.0 0.64 0.40 284 2.0 0.64 0.40 334 2 .0 0.64 0.40 285 1.0 -0.36 0.13 335 2.0 0.64 0.40 286 1.0 -0.36 0.13 336 1.0 -0.36 0.13 287 1.0 -0.36 0.13 337 2.0 0.64 0.40 288 1.0 -0.36 0.13 338 2.0 0.64 0.40 289 2.0 0.64 o.40 339 2.0 0.64 0.40 290 2.0 0.64 0.40 340 1.0 -0.36 0.13 291 2.0 0.64 0.40 341 1.0 -0.36 0.13 292 1.0 -0.36 0.13 342 2.0 0.64 0.40 293 1.0 -0.36 0.13 343 2.0 0.64 0.40 294 2.0 0.64 0.40 344 1.0 -0.36 0.13 295 2.0 0.64 0.40 345 1.0 -0.36 0.13 296 1.0 -0.36 0.13 346 2.0 0.64 0.40 297 2.0 0.64 0.40 347 1.0 0.36 0.13 298 1.0 -0.36 0.13 348 2.0 0,64 0.40 299 2.0 0.64 0.40 349 2.0 0.64 0.40 300 1.0 -0.36 0.13 350 1.0 -0.36 0.13 73 12.880 81 15.056 Sum(n) Suin(n-N) 2 Sum(n) Sum(n-N):z Page 4 of 6 C:\OFFICE\AREA\I\ISUPYCMT.WB2

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA 11 I" SOUTH OF URANIUM PLANT (AFFECTED) SURFACE n = pCi/g Th (NAT) n = pCi/g Th (NAT)

Number n (n-N) (n-N)2 Number n (n-N) (n-N)2 351 1.0 -0.36 0.13 401 1.0 -0.36 0.13 352 1.0 -0.36 0.13 402 1.0 -0.36 0.13 353 1.0 -0.36 0.13 403 1.0 -0.36 0.13 354 1.0 -0.36 0.13 404 1.0 -0.36 0.13 355 1.0 -0.36 0.13 405 1.0 -0.36 0.13 356 1.0 -0.36 0.13 406 1.0 -0.36 0.13 357 1.0 -0.36 0.13 407 1.0 -0.36 0.13 358 2.0 0.64 0.40 408 1.0 -0.36 0.13 359 2.0 0.64 0.40 409 1.0 -0.36 0.13 360 2.0 0.64 0.40 410 1.0 ~0.36 0.13 361 1.0 -0.36 0.13 411 1.0 -0.36 0.13 362 2.0 0.64 0.40 412 "1.0 -0.36 0.13 363 1.0 -0.36 0.13 413 1.0 -0.36 0.13 364 2.0 0.64 0.40 414 2.0 0.64 0.40 365 1.0 -0.36 0.13 41S 1.0 -0.36 0.13 366 1.0 ..0.36 0.13 416 2.0 0.64 o.40 367 2.0 0.64 0.40 417 1.0 -0.36 0.13 368 2.0 0.64 0.40 418 1.0 -0.36 0.13 369 1.0 -0.36 0.13 419 1.0 -0.36 0.13 370 1.0 --0.36 0.13 420 1.0 -0.36 0.13 371 1.0 -0.36 0.13 421 2.0 0.64 o.40 37l 1.0 -0.36 0.13 422 1.0 -0.36 0.13 373 2.0 0.64 0.40 423 1.0 -0.36 0.13 374 1.0 --0.36 0.1.3 424 1.0 -0.36 0.13 375 1.0 -0.36 0.13 425 1.0 -0.36 0.13 376 1.0 -0.36 0.13 426 1.0 -0.36 0.13 377 1.0 -0.36 0.13 427 1.0 -0.36 0.13 378 2.0 0.64 0.40 428 1.0 -0.36 0.13 379 1.0 -0.36 0.13 429 1.0 -0.36 0.13 380 1.0 -0.36 0.13 430 1.0 -0.36 0.13 381 1.0 -0.36 0.13 431 1.0 -0.36 0.13 382 1.0 -0.36 0.13 432 1.0 -0.36 0.13 383 1.0 -0.36 0.13 433 1.0 -0.36 0.13 384 1.0 -0.36 0.13 434 1.0 -0.36 0.13 385 1.0 -0.36 0.13 435 1.0 -0.36 0.13 386 1.0 -0.36 0.13 436 1.0 -0.36 0.13 387 1.0 -0.36 0.13 437 1.0 -0.36 0.13 388 1.0 -0.36 0.13 438 1.0 -0.36 0.13 389 1.0 -0.36 0.13 439 1.0 -0.36 0.13 390 1.0 -0.36 0.13 440 1.0 -0.36 0.13 391 1.0 -0.36 0.13 441 1.0 -0.36 0.13 392 1.0 -0.36 0.13 442 1.0 -0.36 0.13 393 1.0 -0.36 0.13 443 1.0 -0.36 0.13 394 1.0 -0.36 0.13 444 1.0 -0.36 0.13 395 1.0 -0.36 0,13 445 1.0 -0.36 0.13 396 1.0 -0.36 0.13 446 1.0 -0.36 0.13 397 1.0 -0.36 0.13 447 1.0 -0.36 0.13 398 1.0 -0.36 0.13 448 *1.0 -0.36 0.13 399 1.0 -0.36 0.13 449 1.0 -0.36 0.13 400 1.0 -0.36 0.13 450 1.0 -0.36 0.13 59 9.073 53 7.442 Sum(n) Sum(n-N)1 Sum(n) Surn(n-N)1 Pages of6 C:\OFFICE\AREA\I\ISUPYCMT.WB2

04/01/99 CIMARRON CORPORATION - CIMARRON FACILITY TRUE MEAN ACTIVITY VS. GUIDELINE VALUE AT 95% CONFIDENCE AREA 11 I 11 SOUTH OF URANIUM PLANT (AFFECTED) SURFACE Number n (n-N) n = p Ci/0 Tl I (NAT)

(n-N)l Number n n=p Ci/,g Tl l (NA T)

(n-N) (0-N)l 451 1.0 -0.36 0.13 501 0.0 0.00 0.00 452 1.0 ..0.36 0. 13 502 0.0 0.00 0.00 453 1.0 -0.36 0.13 503 0.0 o.oo 0.00 454 1.0 --0.36 0.13 504 0.0 0.00 0.00 455 1.0 -0.36 0.13 505 0.0 0.00 o.oo 456 1.0 ..0.36 0.13 506 0.0 0.00 0.00 457 0.0 0.00 0.00 507 0.0 0.00 0.00 458 0.0 0.00 0.00 508 0.0 0.00 0.00 459 0.0 0.00 0.00 509 0.0 0.00 0.00 460 0.0 0.00 o.oo 510 0.0 0.00 0.00 461 0.0 0.00 0.00 511 0 .0 0.00 0.00 462 0.0 0.00 0.00 512 0.0 0.00 0.00 463 0.0 0.00 0.00 513 0.0 o.oo 0.00 464 0.0 0.00 0.00 514 0.0 0.00 0.00 465 0.0 0.00 0.00 515 0.0 0.00 0.00 466 0.0 o.oo 0.00 516 0.0 0.00 0.00 467 0.0 o.oo o.oo 517 0.0 0.00 0.00 468 0.0 0.00 0.00 518 0.0 0.00 0.00 469 0.0 0.00 0.00 519 0.0 0.00 0.00 470 0.0 0.00 0.00 520 0.0 o.oo 0.00 471 0.0 0.00 0.00 521 0.0 o.oo 0.00 472 0.0 0.00 0.00 522 0.0 0.00 0.00 473 0.0 0.00 0.00 523 0.0 o.oo 0.00 474 0.0 0.00 0.00 524 0.0 0.00 0.00 475 0.0 0.00 0.00 525 0.0 o.oo 0.00 476 0.0 0.00 0.00 526 0.0 0.00 0.00 477 0.0 0.00 0.00 527 0.0 0.00 0.00 478 0.0 0.00 0.00 528 0.0 o.oo 0.00 479 0.0 0.00 0.00 529 0.0 0.00 0.00 480 0.0 0.00 0.00 530 0.0 0.00 0.00 481 0.0 0.00 0.00 531 0.0 0.00 0.00 482 0.0 0.00 0.00 532 0.0 0.00 0.00 483 0.0 0.00 0.00 533 0.0 0.00 0.00 484 0.0 0.00 0.00 534 0.0 0.00 0.00 485 0.0 0.00 0.00 535 0.0 0.00 0.00 486 0.0 0.00 0.00 536 0.0 0.00 0.00 487 0.0 0.00 0.00 537 0.0 o.oo 0.00 488 0.0 0.00 0.00 538 0.0 0.00 0.00 489 0.0 0.00 0.00 539 0.0 . 0.00 0.00 490 0.0 0.00 0.00 540 0.0 0.00 0.00 491 0.0 0.00 0.00 541 0.0 0.00 0.00 492 o.o 0.00 0.00 542 0.0 0.00 0.00 493 0.0 0.00 0.00 543 0.0 0.00 0.00 494 0.0 0.00 o.oo 544 0.0 0.00 o.oo 49S 0.0 0.00 0.00 545 0.0 0.00 0.00 496 0.0 0.00 0.00 546 0.0 0.00 o.oo 497 0.0 0.00 0.00 547 0.0 o.oo 0.00 498 0.0 0.00 0.00 548 0.0 0.00 0.00 499 0.0 0.00 0.00 549 0.0 0.00 0.00 500 0.0 0.00 0.00 550 0.0 0.00 .0.00 6 0.795 0 0.000 Sum(n) Sum(n-N)2 Sum(n) Sum(n-N)1 Page 6 of6 C:\OFFICE\AREA\I\ISUPYCMT .WB2

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