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.
An UST system that does not meet the performance
standards in R18-12-220 or R18-12-221 may use annual tank tightness testing
conducted in accordance with R18-12-243(C) in conjunction with either monthly
inventory control conducted in accordance with R18-12-243(A) or the manual tank
gauging requirements of R18-12-243(B) until December 22, 1998, when the tank
shall be upgraded under R18-12-221 or permanently closed under R18-12-271
through R18-12-274 . The initial tank tightness test shall be performed on or
before the compliance date for the tank as set forth in R18-12-240(C)
;
3
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).
B
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.
Notes
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.
