Section Env-Wq 1012.02 - Gravity Grease Interceptor Design Requirements(a) The gravity grease interceptor shall be sized to have a minimum hydraulic detention time of 36 hours and minimum tank size of 1,000 gallons.(b) The outlet of the gravity grease interceptor shall be protected with a baffle that extends downward and terminates 6 to 12 inches from the inside bottom of the gravity grease interceptor.(c) A gravity grease interceptor shall meet the requirements of: (1) Env-Wq 1010.03 relative to being water-tight, provided that "septic tank" shall be replaced with "gravity grease interceptor"; and(2) Env-Wq 1010.06 relative to design, provided that "septic tank" shall be replaced with "gravity grease interceptor".(d) All connections between a gravity grease interceptor and the pipes leading to and exiting from the tank shall be sealed with a watertight, flexible connector that: (1) Will accommodate normal movement of the tank without leaking or breaking; and(2) Is certified by the manufacturer or distributer as conforming to ASTM C1644.(e) Any precast concrete gravity grease interceptor shall be certified by its manufacturer or distributer as meeting the applicable requirements of ASTM C1613.(f) Fiber-reinforced polyester used for manufacturing gravity grease interceptors and components shall be certified by its manufacturer or distributer as meeting the applicable requirements of section 6 of IAPMO/ANSI Z1000.(g) Thermoplastic gravity grease interceptors and components shall be certified by its manufacturer or distributer as meeting the applicable requirements of section 7 of IAPMO/ANSI Z1000.N.H. Code Admin. R. Env-Wq 1012.02
(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08
Amended by Volume XXXVI Number 41, Filed October 13, 2016, Proposed by #11184, Effective 10/1/2016, Expires 10/1/2026.