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Instructions – Industrial/Commercial ApplicationPage 3 of 3

The minimum required features for grease interceptors include:

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Flow rate of the interceptors shall be sufficient to handle the maximum demand of the connected system, and the grease interceptors shall be constructed of durable, corrosion resistant materials and shall have watertight covers securely fastened in place.

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No interior grease interceptor shall receive the discharge from food waste grinder or commercial dishwashing machine.  Exterior manhole-type grease interceptors may receive the discharge from a food waste grinder and/or a commercial dishwashing machine if allowed by the State and Local Plumbing Codes.

Oil/Flammable Liquid Interceptors/Separators

All establishments, including but not limited to commercial vehicle storage garages, repair facilities, service stations and similar facilities that conduct servicing, repairing, maintenance or storage of motor vehicles where oil and/or flammable liquid is or may be introduced into the sewerage system shall have one or more approved oil separators installed into which all such wastes shall discharge prior to connection to the RRWRD sewerage system.  In areas where vehicles are stored and not serviced, a combination oil/sand separator may be installed with a static water storage volume of one (1) gallon for every 100 square feet of area to be drained.

In facilities designed for mechanical washing of vehicles, a sand and gravel separator shall be required to receive the wastewater from all washing facilities.  In a one-vehicle manual washing facility, a combination oil/sand separator may be required with a minimum static water capacity of 30 gallons.

Solids Interceptor

Commercial laundries shall be equipped with an interceptor having a screening or similar device that will prevent materials detrimental to the sewerage system from passing into such system.

bal forms/industrial commercial application for sewer connection permit instructions

Revised: 2/09

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