Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 8 - Geology Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Regulations Governing Surface Coal Mining › Appendix 11-8-2-A - To The Administrative Procedures Act Rules › Addendum 11-8-2-11-8-2-A-A - Selection of Random Sampling Sites

Current through June 25, 2024
All Rules
The permittee shall use x and y grid coordinates in
					 establishing the location of sampling sites on the reclaimed area (and on the
					 reference area, if a reference area standard is used).
A grid shall be placed or drawn on the map containing the
					 areas to be sampled. The grid must be large enough so that all of the release
					 or reference area is covered by the grid (see drawing in Figure 1). Also, the
					 grid pattern shall be such that the axes are 200 feet apart or closer.
The x and y axes shall be numbered in consecutive order
					 beginning at the extreme lower left point of the grid (this point being
					 1).
The permittee shall generate random number pairs for each x
					 and y axis combination needed. For example, if five sampling locations are to
					 be established, the permittee must generate five random number pairs.
The random numbers table shown in Table 1 may be used to
					 choose the numbers needed. The table is used as follows:
Step 1) Choose an axis to work on (x or y).
Step 2) Flip a coin twice to determine a column on which to
					 start (refer to coin flip combinations at the head of each column).
Step 3) By beginning at the top of the column selected,
					 begin reviewing the numbers until a number that falls within the range of those
					 on the chosen grid axis is found. If the range of numbers on the axis is less
					 than 10, then you will only review the last digit of the numbers in the column.
					 If the range of numbers is more than 10 but less than 100, then the last two
					 digits will be reviewed.
Step 4) Record the first number found.
Step 5) Beginning after the last number found, continue
					 down the column until another number is located within the given range. Record
					 this number and continue following the above procedure until the required
					 amount of numbers is found and recorded. If you reach the bottom of the column
					 before you locate enough numbers, proceed to one of the adjacent columns,
					 starting again at the top. When all columns have been used, begin again with
					 the first column used, except review only the first (instead of the last) one
					 or two digits of the numbers in the column.
Step 6) After enough numbers are generated for the first
					 axis chosen, restart the process at step 1 for the other axis.
After enough random number pairs have been generated for
					 each axis, locate the sample points on the grid. If a point(s) falls outside
					 the release or reference area, a new point(s) must be chosen as explained
					 above.
Step 7) After enough numbers are generated for the first
					 axis chosen, restart the process at step 1 for the other axis.
After enough random number pairs have been generated for
					 each axis, locate the sample points on the grid. If a point(s) falls outside
					 the release or reference area, a new point(s) must be chosen as explained
					 above.
Addendum A
Table 1
A Set of Random Numbers
tails/heads column 1
heads/heads column 2
tails/tails column 3
heads/tails column 4
6327
0983
3798
4679
2167
6484
9467
9058
3939
0407
1804
8827
4672
3865
5689
9878
8071
5185
5514
5008
9509
0603
7461
8550
6615
2588
3558
3349
4833
2422
9790
1183
5594
1809
6931
6571
9441
1699
3947
7702
7922
9812
7229
5252
9419
6494
8179
8065
6178
3556
2466
2495
2647
3961
7546
4799
0474
1839
6926
6534
9814
1577
8293
0301
0104
4579
0627
8667
1608
9470
4131
5345
9722
1557
0471
5498
4189
3582
3675
9461
9855
8088
9006
6897
5791
8234
1472
3421
0872
3310
0510
9046
8953
9809
8037
8376
2895
4319
6544
8953
0609
5248
8734
2498
0795
2464
6170
1063
1572
7371
7936
2841
4307
0294
6060
5194
4857
0197
2401
7005
1632
7189
6463
9830
0745
8034
7882
7152
0736
5110
5165
6571
8168
7924
5876
1407
7468
5313
2736
9010
6044
5420
3077
9070
6716
0059
3001
8871
9342
0169
6880
7986
5809
6048
9051
1151
1532
9715
7081
0109
5506
5812
5917
4415
4045
1751
2817
9958
5966
9930
6437
7279
6062
3296
5093
2503
4097
8379
5670
0614
6793
3999
4645
5143
7960
4853
0583
1920
1321
4067
8503
1604
Addendum A
Figure 1
Random Plot Locations Grid Overlay
random plot
random numbers
x
y
1
5
10
2
5
6
3
9
6
4
9
9
5
12
9
6
12
3
7
13
15
8
15
3
9
15
13
10
16
15
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