Section We 602.16 - Setback Reductions: Special Methods of Construction for Bedrock Wells(a) For a bedrock well that does not comply with the setback requirements of We 602.06 through We 602.12, as applicable, a water well contractor shall: (1) For a bedrock well with a minimum setback requirement of 75 feet, install casing in accordance with the Table 602-1: Table 602-1 Minimum Casing Length Where a 75-foot Setback is Required
Horizontal Setback (ft.) | Minimum Length of Casing (ft.) |
75 or greater | 20 |
70-74 | 27 |
65-69 | 37 |
60-64 | 45 |
55-59 | 51 |
50-54 | 56 |
45-49 | 60 |
40-44 | 63 |
35-39 | 66 |
30-34 | 69 |
25-29 | 71 |
(2) For a bedrock well with a minimum setback requirement of 50 feet, install casing in accordance with the Table 602-2: Table 602-2 Minimum Casing Length Where a 50-foot Setback is Required
Horizontal Setback (ft.) | Minimum Length of Casing (ft.) |
50 or greater | 20 |
45-49 | 22 |
40-44 | 30 |
35-39 | 36 |
30-34 | 40 |
25-29 | 43 |
(3) Grout the casing as specified in We 602.05; and(4) Seal the casing to a minimum depth of 10 feet into competent bedrock.(b) For purposes of determining minimum casing length for setbacks to effluent disposal areas or septic tanks, in accordance with Table 602-1, if a well is located at a higher elevation than the effluent disposal area, the difference in elevation shall be added to the minimum required casing length.N.H. Admin. Code § We 602.16
Derived From Volume XXXVII Number 2, Filed January 12, 2017, Proposed by #12083, Effective 3/1/2017, Expires 3/1/2027.