N.M. Admin. Code § 20.5.111.1103

Current through Register Vol. 35, No. 23, December 10, 2024

Section 20.5.111.1103 - INTERSTITIAL MONITORING REQUIREMENTS FOR ASTS

Owners and operators of ASTs may use interstitial monitoring to continuously monitor between the AST and a secondary barrier immediately around and underneath the tank, but only if the AST system meets all of the following requirements:

A. the ASTs are manufactured or upgraded to include a double-walled bottom in accordance with the current edition of an industry standard or code of practice developed by a nationally recognized association or independent testing laboratory which can be remotely monitored, or the ASTs are installed inside secondary containment with an impervious barrier beneath the ASTs meeting the requirements of 20.5.109.904 NMAC and the interstice between them can be remotely monitored;

B. the monitoring system between the AST and the secondary barrier shall meet all of the following requirements;

(1) for cathodically protected ASTs, the secondary barrier shall be installed so that it does not interfere with the proper operation of the cathodic protection system;

(2) the groundwater, soil moisture, or rainfall will not render the testing or sampling method used inoperative so that a release could go undetected for more than 30 days;

(3) the site is assessed to ensure that the secondary barrier is always above the groundwater and not in a 25-year flood plain, unless the barrier and monitoring designs are for use under such conditions;

(4) the locations and ports of monitoring wells are clearly marked and secured to avoid unauthorized access and tampering;

C. owners and operators shall have a qualified tester annually test to ensure proper operation of sensors and electrical or mechanical devices, which includes but is not limited to testing alarm operability, communication with controller, and proper height and location of sensors installed. Testing shall be conducted in accordance with the equipment manufacturers' testing instructions or in accordance with the current edition of an industry standard or code of practice developed by a nationally recognized association or independent testing laboratory.

D. Owners and operators shall ensure the requirements in 20.5.111.1100 NMAC are met prior to implementing this method.

E. Owners and operators shall maintain and provide the department reports relating to the requirements of this section in accordance with 20.5.111.1111 NMAC and 20.5.111.1112 NMAC.

N.M. Admin. Code § 20.5.111.1103

Adopted by New Mexico Register, Volume XXIX, Issue 14, July 24, 2018, eff. 7/24/2018