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Table 6. 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 whole-coal basis, by county and coal bed/zone for the Commonwealth of Pennsylvania. [nd, no data; no., number.] |
|||||||
|
County |
Coal Bed/Zone |
Mean |
Minimum |
Maximum |
Standard Deviation |
No. of Samples |
|
|
Allegheny |
Pittsburgh |
22 |
5.3 |
33 |
12 |
4 |
|
|
Allegheny |
Upper Freeport |
nd |
3.3 |
3.3 |
nd |
1 |
|
|
Armstrong |
Upper Freeport |
32 |
16 |
60 |
13 |
13 |
|
|
Armstrong |
Lower Kittanning |
11 |
0.70 |
25 |
9.5 |
5 |
|
|
Beaver |
Lower Kittanning |
14 |
0.81 |
21 |
9.3 |
4 |
|
|
Butler |
Upper Freeport |
38 |
17 |
56 |
14 |
13 |
|
|
Cambria |
Upper Freeport |
34 |
6.8 |
100 |
26 |
12 |
|
|
Cambria |
Lower Kittanning |
31 |
0.79 |
90 |
36 |
5 |
|
|
Clarion |
Upper Freeport |
nd |
46 |
46 |
nd |
1 |
|
|
Clarion |
Lower Kittanning |
15 |
1.0 |
42 |
15 |
6 |
|
|
Clearfield |
Upper Freeport |
74 |
33 |
130 |
37 |
6 |
|
|
Clearfield |
Lower Kittanning |
16 |
1.6 |
49 |
14 |
15 |
|
|
Clinton |
Lower Kittanning |
6.6 |
0.89 |
15 |
7.6 |
3 |
|
|
Elk |
Upper Freeport |
25 |
3.2 |
47 |
31 |
2 |
|
|
Elk |
Lower Kittanning |
14 |
0.14 |
79 |
18 |
17 |
|
|
Fayette |
Pittsburgh |
nd |
0.50 |
0.50 |
nd |
1 |
|
|
Fayette |
Upper Freeport |
50 |
15 |
97 |
31 |
6 |
|
|
Fayette |
Lower Kittanning |
44 |
0.68 |
66 |
30 |
4 |
|
|
Greene |
Pittsburgh |
2.7 |
0.46 |
11 |
3.4 |
10 |
|
|
Greene |
Upper Freeport |
nd |
26 |
26 |
nd |
1 |
|
|
Greene |
Lower Kittanning |
0.64 |
0.35 |
1.1 |
0.41 |
3 |
|
|
Indiana |
Pittsburgh |
nd |
6.5 |
6.5 |
nd |
1 |
|
|
Indiana |
Upper Freeport |
27 |
0.73 |
130 |
19 |
95 |
|
|
Indiana |
Lower Kittanning |
18 |
0.30 |
74 |
26 |
7 |
|
|
Jefferson |
Upper Freeport |
50 |
31 |
71 |
16 |
6 |
|
|
Jefferson |
Lower Kittanning |
13 |
1.0 |
42 |
15 |
7 |
|
|
Lawrence |
Upper Freeport |
nd |
8.2 |
8.2 |
nd |
1 |
|
|
Lawrence |
Lower Kittanning |
16 |
0.96 |
30 |
15 |
3 |
|
|
Somerset |
Pittsburgh |
1.9 |
0.33 |
10 |
3.2 |
9 |
|
|
Somerset |
Upper Freeport |
38 |
2.0 |
110 |
34 |
16 |
|
|
Somerset |
Lower Kittanning |
15 |
0.65 |
48 |
16 |
8 |
|
|
Washington |
Pittsburgh |
20 |
0.55 |
61 |
18 |
10 |
|
|
Washington |
Upper Freeport |
nd |
30 |
30 |
nd |
1 |
|
|
Westmoreland |
Pittsburgh |
nd |
3.2 |
3.2 |
nd |
1 |
|
|
Westmoreland |
Upper Freeport |
22 |
8.3 |
41 |
13 |
6 |
|
|
Westmoreland |
Lower Kittanning |
nd |
16 |
16 |
nd |
1 |
|