Section Env-Dw 406.16 - Pumphouse Design and Construction(a) Pumphouses shall have screened gravity floor drains or equivalent with all floors pitched ¼-inch per foot toward the drains. Sump pumps shall not be acceptable. The drain pipes shall not discharge to any surface water and shall be screened at the discharge end to prevent small animals or insects from blocking flow. The pumphouse floor level shall be above the seasonal high water table.(b) The layout of equipment and the design of the pumphouse shall provide for convenient operation and preventative maintenance. The design and materials shall include provisions to minimize vandalism damage to wells, doors, and roofs. Windows shall be avoided. The pump station walls and ceilings shall be fully insulated. Construction materials shall be highly resistant to moisture, decay, and vandalism.(c) For all proposed pumphouses, the applicant shall make every reasonable effort to design and construct the pumphouse at finished grade. Where constraints are encountered, the station may be as much as 5 feet below grade. If the floor of the pumphouse is below grade, the design shall address the "confined space rules" of the U.S. Department of Labor, Occupational and Health Administration (OSHA) as specified in 29 CFR 1910.146.N.H. Code Admin. R. Env-Dw 406.16
(See Revision Note at part heading for Env-Dw 406) #10613, eff 6-1-14