New Jersey Administrative Code
Title 7 - ENVIRONMENTAL PROTECTION
Chapter 14B - UNDERGROUND STORAGE TANKS
Subchapter 4A - FIELD-CONSTRUCTED TANKS AND AIRPORT HYDRANT SYSTEMS
Section 7:14B-4A.2 - Installation, inspection, and release detection requirements specific to underground storage tank systems with field-constructed tanks and airport hydrant systems

Universal Citation: NJ Admin Code 7:14B-4A.2

Current through Register Vol. 56, No. 18, September 16, 2024

(a) The owner and operator may use single-walled piping when installing or replacing piping associated with underground storage tank systems with field-constructed tanks greater than 50,000 gallons and piping associated with airport hydrant systems. Piping associated with underground storage tank systems with field-constructed tanks less than or equal to 50,000 gallons that are not part of an airport hydrant system shall comply with the requirements for secondary containment in accordance with N.J.A.C. 7:14B-4.1(a) 2iv, when installed or replaced.

(b) In addition to conducting walkthrough inspections in accordance with N.J.A.C. 7:14B-5.12, the owner and operator shall include, at least once every 30 days, the following additional areas for airport hydrant systems inspections, if confined space entry according to the Occupational Safety and Health Administration (see 29 CFR Part 1910) is not required, or at least annually if confined space entry is required; and maintain records documenting the inspection according to N.J.A.C. 7:14B-5.12(c):

1. Visually check hydrant pits for any damage, remove any liquid or debris, and check for any leaks; and

2. Check hydrant piping vaults for any hydrant piping leaks.

(c) The owner and operator of an underground storage tank system with field-constructed tanks and airport hydrant systems shall comply with the release detection requirements described below:

1. Field-constructed tanks with a capacity less than or equal to 50,000 gallons, and underground piping associated with field-constructed tanks less than or equal to 50,000 gallons shall meet the release detection requirements in accordance with N.J.A.C. 7:14B-6.

2. Field-constructed tanks with a capacity greater than 50,000 gallons shall meet either the requirements in N.J.A.C. 7:14B-6 (except N.J.A.C. 7:14B-6.5(a) 5 or 6 shall be combined with inventory control as stated below) or use one or a combination of the following alternative methods of release detection:

i. Conduct an annual tank tightness test that can detect a 0.5 gallon per hour leak rate;

ii. Use an automatic tank gauging system to perform release detection at least every 30 days that can detect a leak rate less than or equal to one gallon per hour. This method must be combined with a tank tightness test that can detect a 0.2 gallon per hour leak rate performed at least every three years;

iii. Use an automatic tank gauging system to perform release detection at least every 30 days that can detect a leak rate less than or equal to two gallons per hour. This method must be combined with a tank tightness test that can detect a 0.2 gallon per hour leak rate performed at least every two years;

iv. Perform vapor monitoring (conducted in accordance with N.J.A.C. 7:14B-6.5(a) 5 for a tracer compound placed in the tank system) capable of detecting a 0.1 gallon per hour leak rate at least every two years;

v. Perform inventory control (conducted in accordance with Department of Defense Directive 4140.25; ATA Airport Fuel Facility Operations and Maintenance Guidance Manual; or equivalent procedures) at least every 30 days that can detect a leak equal to or less than 0.5 percent of flow-through; and

(1) Perform a tank tightness test that can detect a 0.5 gallon per hour leak rate at least every two years; or

(2) Perform vapor monitoring or ground water monitoring (conducted in accordance with N.J.A.C. 7:14B-6.5(a) 5 or 6, respectively, for the stored regulated substance) at least every 30 days; or

vi. Another method of release detection may be used if the owner and operator comply with the requirements below. In evaluating a method, the Department shall consider the size of release that the method can detect and the frequency and reliability with which it can be detected.

(1) Demonstrate to the Department that the alternate method(s) can detect a release as effectively as any of the methods allowed in (c)2i through v above.

(2) Obtain approval from the Department, through the issuance of a permit pursuant to N.J.A.C. 7:14B-10, and comply with any conditions imposed by the Department on its use to ensure the protection of human health and the environment.

3. Underground piping associated with airport hydrant systems and field-constructed tanks greater than 50,000 gallons shall meet either the requirements in N.J.A.C. 7:14B-6 (except N.J.A.C. 7:14B-6.5(a) 5 or 6 shall be combined with inventory control as stated below) or use one or a combination of the following alternative methods of release detection:

i. Perform a semiannual or annual line tightness test at or above the piping operating pressure in accordance with the table below.

Maximum Leak Detection Rate per Test Section Volume

Gallons per Hour (gph)
Test Section Volume	Semiannual Test-Leak Detection Rate	Annual Test-Leak Detection Rate
<50,000 gallons	1.0 gph	0.5 gph
>/=50,000 to <75,000 gallons	1.5 gph	0.75 gph
>/=75,000 to <100,000 gallons	2.0 gph	1.0 gph
>/=100,000 gallons	3.0 gph	1.5 gph

ii. Perform vapor monitoring (conducted in accordance with N.J.A.C. 7:14B-6.5(a) 5 for a tracer compound placed in the tank system) capable of detecting a 0.1 gallon per hour leak rate at least every two years;

iii. Perform inventory control (conducted in accordance with Department of Defense Directive 4140.25; ATA Airport Fuel Facility Operations and Maintenance Guidance Manual; or equivalent procedures) at least every 30 days that can detect a leak equal to or less than 0.5 percent of flow-through; and

(1) Perform a line tightness test (conducted in accordance with paragraph (i) of this section using the leak rates for the semiannual test) at least every two years; or

(2) Perform vapor monitoring or ground water monitoring (conducted in accordance with N.J.A.C. 7:14B-6.5(a) 5 or 6, respectively, for the stored regulated substance) at least every 30 days; or

iv. Another method of release detection may be used if the owner and operator comply with the requirements below. In evaluating a method, the Department shall consider the size of release that the method can detect and the frequency and reliability with which it can be detected.

(1) Demonstrate to the Department that the alternate method(s) can detect a release as effectively as any of the methods allowed in (c)2i through iii above.

4. The owner and operator shall maintain release detection records according to the recordkeeping requirements in N.J.A.C. 7:14B-6.7.

(d) The Department can direct the owner and operator of an underground storage tank system with field-constructed tanks or airport hydrant system permanently closed before October 13, 2015, to assess the excavation zone and close the underground storage tank system in accordance with N.J.A.C. 7:14B-9, if releases from the underground storage tank may, as judged by the Department, pose a current or potential threat to human health and the environment.

(e) An owner and operator may use military construction criteria, such as Unified Facilities Criteria (UFC) 3-460-01, "Petroleum Fuel Facilities," in addition to the codes of practice listed in N.J.A.C. 7:14B-4.1, when designing, constructing, and installing airport hydrant systems and underground storage tank systems with field-constructed tanks.

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