Table 7. Arsenic content (parts per million) means, ranges, and standard deviations for samples from coal beds/zones included in the assessment of Northern and Central Appalachian Basin coal regions on an as-received or remnant moisture, whole-coal basis, by county and coal bed/zone for the Commonwealth of Virginia.

[nd, no data; no., number.]

County

Coal Bed/Zone

Mean

Minimum

Maximum

Standard Deviation

No. of Samples

Buchanan

Pond Creek

0.89

0.89

0.89

0.0024

2

Buchanan

Pocahontas No. 3

12

2.7

29

8.7

7

Lee

Campbell Creek/
Upper Elkhorn No. 3

nd

2.0

2.0

nd

1

Lee

Upper Elkhorn Nos. 1 and 2/Powellton

16

1.7

23

12

3

Russell

Pocahontas No. 3

nd

2.7

2.7

nd

1

Tazewell

Pocahontas No. 3

4.7

3.9

5.1

1.0

3

Wise

Stockton and Coalburg

nd

2.6

2.6

nd

1

Wise

Winifrede/Hazard

2.8

2.4

3.0

0.35

3

Wise

Fire Clay

nd

10

10

nd

1

Wise

Williamson/Amburgy

11

0.90

31

17

3

Wise

Campbell Creek/
Upper Elkhorn No. 3

16

1.7

85

24

12

Wise

Upper Elkhorn Nos. 1 and 2/Powellton

5.9

3.2

9.9

3.5

3

Wise

Pond Creek

6.6

1.4

21

6.3

8