Ariz. Admin. Code § 18-12-241

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

Section R18-12-241 - Release Detection for Petroleum UST Systems

A. Owners and operators of petroleum UST systems shall provide release detection for tanks installed on or before January 1, 2009 so that the tanks are monitored for releases at least once every month using one of the methods listed in R18-12-243(D) through (I) except that:

1. An UST system that meets the new or upgraded UST system performance standards of R18-12-220 or R18-12-221, and the monthly inventory control requirements of R18-12-243(A) may use tank tightness testing conducted in accordance with R18-12-243(C) at least every five years until 10 years after the tank was installed; and

2. A tank with a capacity of 550 gallons or less or a tank with a capacity of 551 to 1,000 gallons that meets the tank diameter criteria in R18-12-243(B) may use manual tank gauging conducted in accordance with R18-12-243(B) as a sole method for leak detection.

B. Tanks installed after January 1, 2009, shall be monitored for releases at least once every month in accordance with R18-12-243(G).

C. Owners and operators of petroleum UST systems shall provide release detection for underground piping installed on or before January 1, 2009 so that piping that routinely contains petroleum is monitored for releases in a manner that meets one of the following requirements:

1. Underground piping that conveys petroleum under pressure shall meet both of the following requirements:

a. Be equipped with an automatic line leak detector which meets the requirements of R18-12-244(A);

b. Have an annual line tightness test conducted in accordance with R18-12-244(B) or have monthly monitoring conducted in accordance with R18-12-244(C).

2. Except as otherwise provided in this subsection, underground piping that conveys petroleum under suction shall either have a line tightness test conducted at least every three years in accordance with R18-12-244(B), or use a monthly monitoring method conducted in accordance with R18-12-244(C). Release detection is not required for suction piping that is designed and constructed to meet all of the following standards:

a. The below-grade piping operates at less than atmospheric pressure;

b. The below-grade piping is sloped so that the contents of the pipe will drain back into the storage tank if the suction is released;

c. Only one check valve is included in each suction line;

d. The check valve is located directly below and as close as practical to the suction pump and is capable of being inspected;

e. A method is provided that allows compliance with the requirements of subsections (B)(2)(a) through (d) to be readily determined.

D. Piping installed or replaced after January 1, 2009 shall meet one of the following:

1. Pressurized piping shall be monitored for releases at least every 30 days in accordance with R18-12-243(G) and be equipped with an automatic line leak detector in accordance with R18-12-244(A);

2. Suction piping shall be monitored for releases at least every 30 days in accordance with R18-12-243(G). No release detection is required for suction piping that meets paragraphs (C)(2)(a) through (e) of this Section.

Ariz. Admin. Code § R18-12-241

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