New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Wq - Water Quality and Quantity Programs
Chapter Env-Wq 1000 - SUBDIVISIONS; INDIVIDUAL SEWAGE DISPOSAL SYSTEMS
Part Env-Wq 1008 - DESIGN REQUIREMENTS FOR ALL SYSTEMS
Section Env-Wq 1008.05 - Nitrate Setbacks to Property Lines
Current through Register No. 13, March 27, 2025
(a) The bed shall be located at or beyond the minimum distances from property lines as shown in Table 1008-3, below.
(b) Groundwater easements on abutting property may be used to meet setback distance requirements.
(c) An applicant may request a reduction in one or more of the minimum nitrate setback distances by submitting a hydrogeological analysis of the property demonstrating that the requirements of Env-Wq 402 will be met. If the department determines that the analysis validly demonstrates that the minimum specified nitrate setback distance is not required and the discharge is not prohibited by Env-Wq 402, the department shall approve a reduced setback.
(d) For non-aggregate flows of up to 999 GPD, the setback distance to any property line shall be as specified in Table 1008-2.
(e) If 2 or more EDA are proposed for a single lot and the total combined design flow equals 1,000 GPD or more, the setback distances for each bed shall be determined as follows:
(f) For purposes of determining whether a bed is within the setback distances of another bed on the same lot where the flow to one or both of the beds is less than 1,000 GPD, the setback distances shall be as follows:
(g) Minimum nitrate setback distances to property lines and for use when determining whether (e)(1) or (e)(2), above, applies shall be as follows:
Table 1008-3: Minimum Nitrate Setback Distances (in feet)
|
Design Flow, GPD |
Hydraulically Down-gradient |
Hydraulically Side-gradient |
Hydraulically Up-gradient |
|
1,000-1,100 |
55 |
28 |
14 |
|
1,101-1,200 |
60 |
30 |
15 |
|
1,201-1,300 |
65 |
33 |
17 |
|
1,301-1,400 |
70 |
35 |
18 |
|
1,401-1,500 |
75 |
38 |
19 |
|
1,501-1,600 |
80 |
40 |
20 |
|
1,601-1,700 |
85 |
43 |
22 |
|
1,701-1,800 |
90 |
45 |
23 |
|
1,801-1,900 |
95 |
48 |
24 |
|
1,901-2,000 |
100 |
50 |
25 |
|
2,001-2,100 |
105 |
53 |
27 |
|
2,101-2,200 |
110 |
55 |
28 |
|
2,201-2,300 |
115 |
58 |
29 |
|
2,301-2,400 |
120 |
60 |
30 |
|
2,401-2,500 |
125 |
63 |
32 |
|
2,501-3,000 |
150 |
75 |
37 |
|
3,001-3,500 |
175 |
88 |
44 |
|
3,501-4,000 |
200 |
100 |
50 |
|
4,001-4,500 |
225 |
113 |
57 |
|
4,501-5,000 |
250 |
125 |
63 |
|
5,001-6,000 |
275 |
138 |
69 |
|
6,001-7,000 |
300 |
150 |
75 |
|
7,001-8,000 |
320 |
160 |
80 |
|
8,001-9,000 |
340 |
170 |
85 |
|
9,001-10,000 |
350 |
175 |
88 |
|
10,001-15,000 |
435 |
213 |
107 |
|
15,001-19,999 |
500 |
250 |
125 |
(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08; amd by #9904-A, eff 4-16-11
