76A7

43S4

94A1

SRP-1

1S2.2

46S12

105A3

44S4.9

10S6.1

92A2.6

63S0.6

49S1.1

78A3.2

74A2.4

45S0.9

48S2.3

96A0.6 97A

3.3

79A2.6

93A1.8

64A7.3

65A2.7

82A3.4

83A1.7

81A2.7

73A1.6

75A2.7

8072.3

95D0.4

68A1.9

8120.6

106A1.1

104A0.5

47S18.2

42S41.4

81111.6

107A3.8

50S19.4

108A2.6

100A0.4

109A1.8

101A0.9

102A0.5

OT-72.3

CA-181.5

30S-25.2

SRP-41.8

OT-122.9

CA-19A1.9

SRP-664.3

SRP-753.1

SRP-814.9

SRP-521.2

SRP-211.4

SRP-316.1

0 600Feet

Dissolved Boron inAlluvial Groundwater

Plant Site AreaCSES-Colstrip, Montana

FIGURE B-1

H:\15

046 C

olstri

p 200

9 Plan

tsite G

W M

odelin

g\500

0 GIS\

2010

_Figu

res\A

ppen

dixB\D

issolv

ed Bo

ron in

Alluv

ial Gr

ound

water

.mxd

Source: NRIS Imagery, 2009

E !( Monitoring Well > 1.5 to 5.0

> 5.0 to 20

> 20

Dissolved Boron Concentration (mg/L)

E a s t

F o r

k A r m

e l l s C

r e e k

Winter, Spring 2011 Data

1.5 Baseline Screening Level (mg/L)3.3 Boron Concentration (mg/L)

4S3.6

17SP2

B-70.9

B-61.6

B-50.9B-1

9.2

41SP14

35M0.6

33S0.9

35SP0.4

111SP15

U3-30.1

U3-10.7

89SP1.1

87SP0.4

86SP0.8

85SP0.7

84SP3.8

71SP0.6

54SP2.153SP

2.552SP3.6

51SP2.8

40SP0.3

38SP0.2

37SP0.2

29SP0.9 28SP

0.4

27SP0.9

26SP7.6

22SP1.2

20SP0.3

16SP1.9

70SP33.1

19SP14.9

21SP-20.9

B-40.70.8

18SP0.6

0 800Feet

Dissolved Boron inSpoils Groundwater

Plant Site AreaCSES-Colstrip, Montana

FIGURE B-5

H:\15

046 C

olstri

p 200

9 Plan

tsite G

W M

odelin

g\500

0 GIS\

2010

_Figu

res\A

ppen

dixB\D

issolv

ed Bo

ron in

Spoil

s Grou

ndwa

ter.m

xd

Source: NRIS Imagery, 2009

E !( Monitoring Well > 1.5 to 5.0

> 5.0 to 20

> 20

Dissolved Boron Concentration (mg/L)

Winter, Spring 2011 Data

1.5 Baseline Screening Level (mg/L)3.3 Boron Concentration (mg/L)

6S

62S1

6D0.4

1D3.1

9M3.6

7R0.9

6M0.9

9S1.2

5M2.7

4M1.8

99D0.4

80D0.8

77D1.8

66D0.7

56D7.9

55D7.3

24S1.3

21D0.9

18D0.5

17D0.6

15S0.7

15D0.4

8221.8

90R0.8

69R0.4

14M1.8

12R-225S

33.5

23S2.1

21S1.9

20S1.3

18S0.6

17S0.6

13S3.5

98M0.7

88M0.5

72M0.9

67M2.1

59M7.8

58M3.8

39M0.3

38M0.5

37M0.4

36M0.5

34D0.4

31M4.3

26M0.6

23M0.9

22M1.1

21M0.6

20M0.4

19M0.5

18M0.7

17M2.2

16M2.3

13M0.6

12M0.5

10M0.7

110D1.5

103D0.3

19D-20.5

U3-2R0.8

60M-P3.6

59M-P4.5

58M-P0.9

56M-P4.8

91S23.8

57M-P12.4

0 1,000Feet

Dissolved Boron inBedrock Groundwater

Plant Site AreaCSES-Colstrip, Montana

FIGURE B-9

H:\15

046 C

olstri

p 200

9 Plan

tsite G

W M

odelin

g\500

0 GIS\

2010

_Figu

res\A

ppen

dixB\D

issolv

ed Bo

ron in

Bedro

ck Gr

ound

water

.mxd

Source: NRIS Imagery, 2009

E !( Monitoring Well > 1.2 to 5.0

> 5.0 to 20

> 20

Dissolved Boron Concentration (mg/L)

E a s t

F o r

k A

r m e l

l s

C r e e k

Winter, Spring 2011 Data

1.2 Baseline Screening Level (mg/L)3.3 Boron Concentration (mg/L)