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HRS Table 3-12

Distance-Weighted Population Values for Potential Contamination Factor for Ground Water Migration Pathwaya
Distance category (miles) Number of people within the distance category
0 1
to
10
11
to
30
31
to
100
101
to
300
301
to
1,000
1,001
to
3,000
3,001
to
10,000
10,001
to
30,000
30,001
to
100,000
100,001
to
300,000
300,001
to
1,000,000
1,000,001
to
3,000,000
Other Than Karstb:  
0 to 1/4 0 4 17 53 164 522 1,633 5,124 16,325 52,137 163,246 521,360 1,632,455
Greater than 1/4 to 1/2 0 2 11 33 102 324 1,013 3,233 10,122 32,325 101,213 323,243 1,012,122
Greater than 1/2 to 1 0 1 5 17 52 167 523 1,669 5,224 16,684 52,239 166,835 522,385
Greater than 1 to 2 0 0.7 3 10 30 94 294 939 2,939 9,385 29,384 93,845 293,842
Greater than 2 to 3 0 0.5 2 7 21 68 212 678 2,122 6,778 21,222 67,777 212,219
Greater than 3 to 4 0 0.3 1 4 13 42 131 417 1,306 4,171 13,060 41,709 130,596
Karstc:  
0 to 1/4 0 4 17 53 164 522 1,633 5,214 16,325 52,137 163,246 521,360 1,632,455
Greater than 1/4 to 1/2 0 2 11 33 102 324 1,013 3,233 10,122 32,325 101,213 323,243 1,012,122
Greater than 1/2 to 1 0 2 9 26 82 261 817 2,607 8,163 26,068 81,623 260,680 816,227
Greater than 1 to 2 0 2 9 26 82 261 817 2,607 8,163 26,068 81,623 260,680 816,227
Greater than 2 to 3 0 2 9 26 82 261 817 2,607 8,163 26,068 81,623 260,680 816,227
Greater than 3 to 4 0 2 9 26 82 261 817 2,607 8,163 26,068 81,623 260,680 816,227

a Round the number of people present within a distance category to nearest integer. Do not round the assigned distance-weighted population value to nearest integer.

b Use for all aquifers, except karst aquifers underlying any portion of the sources at the site.

c Use only for karst aquifers underlying any portion of the sources at the site.

 

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