N.J. Admin. Code § 7:10-12.31

Current through Register Vol. 56, No. 11, June 3, 2024

Section 7:10-12.31 - Chemical handling and chemical feed systems

(a) General requirements for chemical handling and chemical feed systems are as follows:

1. Suitable means shall be provided to ensure proper and continuous application rate of chemical.

2. Variation of the feed rate shall not exceed five percent of the intended application rate.

3. Chemical solution feeders shall be located so as to prevent dust and fumes from entering other operating areas in the treatment plant.

4. Chemical solution shall not be introduced directly into any pipe or conduit under negative pressure or directly into a well.

5. An antisiphon device shall be installed on the chemical solution feed line. The device shall include an antisiphon valve to provide a vacuum break on the chemical solution feed line. The chemical feel line shall be looped to a level higher than the highest elevation of the chemical storage tank so as to prevent backsiphonage or drainage of the chemical solution into the treated water supply.

6. Each chemical solution feeder shall be equipped with a no-flow switch to prevent the feeding of chemical solution upon cessation of water flow.

(b) Regulations for chemical solution tanks are as follows:

1. When dissolving a solid treatment chemical, each chemical solution tank shall be provided with adequate agitation to keep the strength of the solution uniform.

2. Makeup water shall be introduced into the chemical solution tank through an air break or other approved method, to prevent back-siphonage.

3. Each chemical solution tank shall be equipped with a cover to prevent contamination and shall be of capacity sufficient to provide at least 24 hours worth of storage at normal operating feed rates.

(c) Chemical feed lines shall be equipped with clean-out connections, shall be easily accessible for repair or cleaning, shall be protected against damage and freezing, shall be corrosion resistant, shall be as short as possible, and shall be provided with adequate slope to permit draining.

(d) Where applicable, as determined by the administrative authority, safety equipment such as a shower, a U.S. Bureau of Mines approved respirator, rubber or neoprene gloves and apron, and goggles shall be provided.

N.J. Admin. Code § 7:10-12.31