N.J. Admin. Code § 7:10-11.11

Current through Register Vol. 56, No. 21, November 4, 2024

Section 7:10-11.11 - Distribution storage requirements

(a) Suppliers of water shall provide finished water storage as required pursuant to 7:19-6.7 and as follows:

1. Each public community water system shall provide storage for finished water as an integral part of its distribution system whether the water system has its own source(s) of water or buys water from another public community water system.

2. The location, size, type and elevation of the equalization reservoir, standpipe, or elevated storage tank shall be such as to ensure that the distribution system meets the pressure requirements established at 7:10-11.10(d). A system designed to provide for fire protection shall, in addition, provide gravity storage. Hydropneumatic pumping system combinations are not acceptable for the purposes of fire protection.

3. Each clear well, whether designed separately or as part of a filter structure, shall meet the requirements for below-grade reservoirs set forth at (e) below.

4. Finished water shall not be stored in a compartment adjacent to an untreated water storage compartment if a single wall separates the two compartments.

5. Each storage reservoir and tank shall be equipped with an overflow and a low level warning alarm.

6. There shall be equipment to determine the water level in each distribution storage tank. Each storage tank with a capacity greater than 100,000 gallons shall be equipped with a level recorder.

7. Water storage facilities shall be designed so as to permit dewatering (for example, by a yard hydrant) for cleaning and maintenance without interrupting service. Direct connection to a storm sewer line or a sanitary sewer line is prohibited.

(b) Each equalization reservoir, standpipe and elevated storage tank shall have adequate safety devices and shall be protected from unauthorized access and vandalism as required pursuant to 7:10-11.6(g).

(c) Regulations for distribution storage roofs and covers are as follows:

1. Each reservoir, standpipe or elevated tank shall be provided with an impermeable and durable roof or cover.

2. The roof of the structure shall be well-drained but drainspout pipes shall not enter the reservoir. Parapets or similar structures that tend to hold water or snow on the roof are prohibited.

3. Each concrete reservoir with an earthen cover shall have a roof that is sloped to facilitate drainage. Such a reservoir should be equipped with an impermeable membrane roof cover.

4. Each access manhole and scuttle located in the roof of an elevated tank or in the roof of a ground-level reservoir shall be framed at least six inches above the surface of the roof. Each manhole located in a below ground-level reservoir shall be elevated at least 36 inches above the ground. Each access manhole and scuttle shall be equipped with a solid cover securely fastened against unauthorized entry.

5. Each vent shall be equipped with a downfacing elbow or mushroom cover and an insect screen. Each vent on a ground-level reservoir or a below ground-level reservoir shall terminate not less than 24 inches above the finished grade, whether roof or soil.

(d) Regulations for inside paint and protective coatings are as follows:

1. Any protective coating in contact with treated water shall be inert and nontoxic and shall meet the requirements of N.J.A.C. 7:10-8.

2. Interior paint shall be properly dried and cured so that, after curing, the coating does not transfer any volatile or toxic substance to the water. Prior to placing a storage facility in service, the water shall be tested for a volatile organic compounds to ensure compliance with MCLs at N.J.A.C. 7:10-5.

(e) Regulations for below-grade reservoirs are as follows:

1. Any reservoir constructed partly or entirely below grade shall be designed, located, and graded so as to be secure against uplift and entry of underground or surface contamination.

2. Where a below-grade reservoir is located within 100 feet of sanitary sewer line, the water supplier shall ensure that such sewer line is constructed of steel, reinforced concrete, cast or ductile iron or other suitable material and shall test such sewer line for water tightness upon installation of the below-grade reservoir.

3. Below-grade reservoirs are prohibited within 100 feet of a sanitary sewer manhole or lateral.

4. If a below-grade reservoir is located in an area with a high water table, the reservoir shall be equipped with a double containment system that includes leak detection equipment or a suitable alternative approved by the Department so as to prevent untreated ground water from entering the reservoir. A pre-application meeting with the Department is recommended if an alternative design is proposed.

(f) Regulations for the construction of above-grade reservoirs, standpipes, and elevated tanks are as follows:

1. Each above-grade reservoir, standpipe, and elevated tank shall be equipped with such inside or outside ladders as may be necessary to facilitate inspection.

2. Each riser pipe shall be protected from freezing.

3. Each overflow of an above-grade reservoir, elevated tank or standpipe shall consist of a downpipe that terminates no less than six inches nor more than (36) inches above the ground, and shall be located so as to prevent erosion of the foundation. A stub overflow is prohibited.

(g) Regulations for hydropneumatic tanks are as follows:

1. Hydropneumatic tanks shall be excluded in calculating the system storage capacity of a public community water system.

2. All hydropneumatic tanks shall be located above ground and completely enclosed within a building. The Department shall approve deviations from this requirement for larger installations if it is not feasible to enclose a larger tank in a building.

3. The total capacity of the wells and pumps shall be at least 10 times the average daily demand in water systems using only hydropneumatic tanks for storage. The gross volume of the hydropneumatic tank, in gallons, shall be at least 10 times the capacity of the largest well and/or pump, rated in gallons per minute.

4. Each hydropneumatic tank shall be equipped with a pressure relief valve and a vacuum relief valve.

(h) All storage reservoirs, tanks, and appurtenances shall be disinfected in accordance with 7:10-11.6(d).

N.J. Admin. Code § 7:10-11.11

Amended by R.2000 d.354, effective 8/21/2000.
See: 31 N.J.R. 2717(b), 32 N.J.R. 3106(a).
In (a)6, deleted "flow" preceding "level recorder" in the second sentence.
Amended by R.2004 d.442, effective 12/6/2004.
See: 36 N.J.R. 295(a), 36 N.J.R. 5383(b).
In (a), rewrote 2.