N.J. Admin. Code § 7:14A-23.16 - Grit removal equipment
(a) Except in small sewage treatment plants with a design flow of less than 150,000 gallons per day, mechanical grit removal devices shall be provided.
(b) Grit chamber channels and flumes shall be designed to produce velocities of not less than 0.5 foot per second and not greater than one foot per second. Detention shall be adequate to deposit grit coarser than 0.20 millimeters.
(c) All grit chambers shall be provided with a means for washing the grit and return of washwater to wastewater flow.
(d) Grit removal facilities shall include adequate means for the collection and temporary storage of grit material prior to sanitary disposal.
1. A stairway or ladder shall be provided for entrance if the unit is four feet or more below ground level.
2. Adequate lighting and ventilation shall be provided.
3. Provisions for dewatering shall be made such that water content is not a limitation to ultimate disposal.
4. Provisions for the treatment and disposal method for drainage of the grit shall be provided.
Notes
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