U.S. Department of the InteriorU.S. Geological Survey

Update on of Dye-Tracer Test at the B4 Area and Offsite Wells

Dye Injection 11/13/07Results up to 4/10/08 (24 weeks)

Preliminary Results

Tracer Test Location Map

Preliminary Results

All Results

LocationDistance

(ft) 3-DAYS 2-WK 3-WK 5-WK 8-WK

RW-203 (100, 139) 92 30446 22973 6990 6650 201

SCT2-C (85-125) 384   ND   .365 (.292) 15.673 (8.937)

SCT2-A (521-543) 384       (0.05) (0.916)

SCT-2B (434-457) 384       (ND)  

SCT-3 (65-95) 400   ND (ND)   ND (ND) ND (ND)

MW0S-2R (133) 528   ND (ND)   ND (ND) ND (ND)

MWOS-03 (11-21) 531   ND (ND)   ND (ND) ND (ND)

Trib-1 633   ND (ND)   ND (ND) ND (ND)

SCT1-C (88-105) 879   0.03   21.455 (4.272) 300.24 (12.712)

SCT1-A (420-560) 879       ND ND

Preliminary Results

All Results (cont’)

Location Distance (ft) 11-WK 16-WK 24-WK

RW-203 (100, 139) 92 4408 2732 5111

SCT2-C (85-125) 384 46 (18.5)  308 (11.6) 249 (20.7)

SCT2-A (521-543) 384  (ND) (.233)  (1.5)

SCT-2B (434-457) 384 (ND)  (ND)  (.286)

SCT-3 (65-95) 400 ND (ND) ND (ND)   0.293 (.247)

MW0S-2R (133) 528 .133 (ND) ND (ND)  ND (ND)

MWOS-03 (11-21) 531 0.058 (0.011) ND (ND)  ND (ND)

Trib-1 633 ND (ND) 

SCT1-C (88-105) 879 264 (10.8) 2140 (13.8)  606 (18.5)

SCT1-A (420-560) 879  (ND) (ND)  (ND)

Preliminary Results

Results: Injection 11/13/07 @ 1300

ob203a RW203

92’ 380’ 880’

SCT2 SCT1

A

B

C

A

B

C

SCT3

(420-560)

(88-105)

(521-543)

(434-457)

(85-125)

(65-95)

(139)

(100)

(119-198)

Depths in parentheses(not to scale)

Preliminary Results

Results – 3 Days

ob203a RW203

92’ 380’ 880’

SCT2 SCT1

A

B

C

A

B

C

SCT3

Not sampled Not sampled

30446

(420-560)

(88-105)

(521-543)

(434-457)

(85-125)

(65-95)

(119-198)

Preliminary Results

Results – 2 Weeks

ob203a RW203

92’ 380’ 880’

SCT2 SCT1

A

B

C

A

B

C

SCT3NDND ND (.030)

?

22973

(420-560)

(88-105)

(521-543)

(434-457)

(85-125)

(65-95)

(119-198)

Preliminary Results

Results – 5 Weeks

ob203a RW203

92’ 380’ 880’

SCT2 SCT1

A

B

C

A

B

C

SCT3ND 0.365 21.4

ND (.050)

ND

ND

6650

(420-560)

(88-105)

(521-543)

(434-457)

(85-125)

(65-95)

(119-198)

Preliminary Results

Results – 8 Weeks

ob203a RW203

92’ 380’ 880’

SCT2 SCT1

A

B

C

A

B

C

SCT3ND 15.6 300.2

.916

? (not sampled)

ND

201

(420-560)

(88-105)

(521-543)

(434-457)

(85-125)

(65-95)

(119-198)

Preliminary Results

Results – 11 Weeks

ob203a RW203

92’ 380’ 880’

SCT2 SCT1

A

B

C

A

B

C

SCT3ND

46264

? (not sampled)

ND

4480

(420-560)

(88-105)

(521-543)

(434-457)

(85-125)

(65-95)

(119-198)

ND

ND

Preliminary Results

Results – 16 Weeks

ob203a RW203

92’ 380’ 880’

SCT2 SCT1

A

B

C

A

B

C

SCT3ND

3082140

? (not sampled)

ND

2732

(420-560)

(88-105)

(521-543)

(434-457)

(85-125)

(65-95)

(119-198)

.233

ND

Preliminary Results

Results – 24 Weeks

ob203a RW203

92’ 380’ 880’

SCT2 SCT1

A

B

C

A

B

C

SCT3.293

249606

? (not sampled)

ND

5111

(420-560)

(88-105)

(521-543)

(434-457)

(85-125)

(65-95)

(119-198)

1.5

.286

Preliminary Results

Map 24-Weeks

Preliminary Results

Tracer Test (FD&C Red #3)

0

500

1000

1500

2000

2500

6-Aug-07 25-Sep-07 14-Nov-07 3-Jan-08 22-Feb-08 12-Apr-08 1-Jun-08

Date

Con

cent

ratio

n

SCT1-C

SCT2-C

Preliminary Results

Tracer Test Continued…

Stay tuned Sampling every 5 weeks Will continue to sample until dye passes

through system or we are satisfied with results

Other zones/wells may be tested