Ariz. Admin. Code § 18-12-240

Current through Register Vol. 30, No. 50, December 13, 2024

Section R18-12-240 - General Release Detection Requirements for All UST Systems

A. Owners and operators of a UST system shall provide a method, or combination of methods, of release detection that:

1. Can detect a release from any portion of the tank and the connected underground piping that routinely contains a regulated substance;

2. Is installed and calibrated in accordance with the manufacturer's instructions;

3. Is operated and maintained, and electronic and mechanical components are tested for proper operation, in accordance with one of the following: manufacturer's instructions; a code of practice developed by a nationally recognized association or independent testing laboratory; or requirements determined by the Director to be no less protective of human health and the environment than the two options in subsections (A)(1) and (A)(2) above. A test of the proper operation shall be performed at least annually and, at a minimum, as applicable to the facility, cover the following components and criteria:

a. Automatic tank gauge and other controllers: test alarm; verify system configuration; test battery backup;

b. Probes and sensors: inspect for residual buildup; ensure floats move freely; ensure shaft is not damaged; ensure cables are free of kinks and breaks; test alarm operability or running condition and communication with controller;

c. Automatic line leak detector: test operation to meet criteria in R18-12-244(A) by simulating a leak;

d. Vacuum pumps and pressure gauges: ensure proper communication with sensors and controller; and

e. Hand-held electronic sampling equipment associated with groundwater and vapor monitoring: ensure proper operation. Note to subsection (A)(3): The following code of practice may be used to comply with subsection (A)(3) of this Section: Petroleum Equipment Institute Publication RP1200-17, "Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities".

4. Meets the performance requirements in R18-12-243 or R18-12-244, or Article 9, as applicable, with any performance claims and their manner of determination described in writing by the equipment manufacturer or installer; and

5. For the methods listed in R18-12-243(B), (C), (D), (H), and (I), R18-12-244(A) and (B), and Article 9, is capable of detecting the leak rate or quantity specified for that method with a Probability of Detection (PD) of a release of 0.95 and a Probability of False Alarm (PFA) of 0.05

.

B. When a release detection method operated in accordance with the performance standards in R18-12-243, R18-12-244, or Article 9 indicates a release may have occurred, owners and operators shall inform the Department in accordance with R18-12-251.

C. Any UST system that cannot apply a method of release detection that complies with the requirements of this Section and R18-12-241 through R18-12-245 shall complete the closure procedures in R18-12-270 through R18-12-274.

Ariz. Admin. Code § R18-12-240

Adopted effective July 30, 1996 (Supp. 96-3). Amended by final rulemaking at 25 A.A.R. 3123, effective 1/1/2020.