Haw. Code R. § 11-280.1-44 - Methods of release detection for piping

Each method of release detection for piping used to meet the requirements of sections 11-280.1-40 to 11-280.1-42 must be conducted in accordance with the following:

(1) Automatic line leak detectors. Methods which alert the operator to the presence of a leak by restricting or shutting off the flow of regulated substances through piping may be used only if they detect leaks of three gallons per hour at ten pounds per square inch line pressure within one hour. An annual test of the operation of the leak detector must be conducted in accordance with section 11-280.1-40(a)(4).

(2) Line tightness testing. A periodic test of piping may be conducted only if it can detect a 0.1 gallon per hour leak rate at one and one-half times the operating pressure.

(3) Applicable tank methods. Any of the methods in section 11-280.1-43(5) to (9) may be used if they are designed to detect a release from any portion of the underground piping that routinely contains regulated substances.

(4) Methods of release detection for piping associated with airport hydrant systems and field-constructed tanks. One or a combination of the following methods of release detection for piping may be used when allowed by section 11-280.1-41.

(A)

(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

Test section volume (gallons)	Semiannual test-leak detection rate not to exceed (gallons per hour)	Annual test-leak detection rate not to exceed (gallons per hour)
<50,000.....................	1.0	0.5
>=50,000 to <75,000.........	1.5	0.75
>=75,000 to <100,000........	2.0	1.0
>=100,000	3.0	1.5

(ii) Piping segment volumes >=100,000 gallons not capable of meeting the maximum 3.0 gallon per hour leak rate for the semiannual test may be tested at a leak rate up to 6.0 gallons per hour according to the following schedule:

PHASE IN FOR PIPING SEGMENTS >=100,000 GALLONS IN VOLUME

First test................	Not later than July 15, 2021 (may use up to 6.0 gph leak rate).
Second test...........	Between July 15, 2021 and July 15, 2024 (may use up to 6.0 gph leak rate).
Third test...............	Between July 15, 2024 and July 15, 2025 (must use 3.0 gph for leak rate).
Subsequent tests..	Not later than July 15, 2025 begin using semiannual or annual line testing according to the Maximum Leak Detection Rate Per Test Section Volume table above

(B) Perform vapor monitoring (conducted in accordance with section 11-280.1-43(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;

(C) 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 thirty-one days that can detect a leak equal to or less than 0.5 percent of flow-through; and

(i) Perform a line tightness test (conducted in accordance with subparagraph (A) using the leak rates for the semiannual test) at least every two years; or

(ii) Perform vapor monitoring or groundwater monitoring (conducted in accordance with section 11-280.1-43(5) or (6), respectively, for the stored regulated substance) at least every thirty-one days; or

(D) Another method approved by the department if the owner and operator can demonstrate that the method can detect a release as effectively as any of the methods allowed in subparagraphs (A) to (C). In comparing methods, the department shall consider the size of release that the method can detect and the frequency and reliability of detection.

Notes

Haw. Code R. § 11-280.1-44

[Eff 7/15/2018] (Auth: HRS §§ 342L-3, 342L-32, 342L-33) (Imp: HRS §§ 342L-3, 342L-32, 342L-33) Comp 1/17/2020 Comp 7/8/21; Comp 3/21/2025