N.M. Admin. Code § 20.5.111.1104

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

Section 20.5.111.1104 - AUTOMATIC TANK GAUGING REQUIREMENTS FOR ASTS

A. Owners and operators shall use automatic tank gauging systems that are third party certified for the size and capacity of the AST. Only third-party certifications that have been reviewed and approved by the national work group on leak detection evaluations (NWGLDE) for AST use, as evidenced by their posting on the NWGLDE website, nwgle.org, will be accepted.

B. Owners and operators of ASTs may use automatic tank gauging as a method of release detection, every 30 days, if the automatic tank gauging system:

(1) tests for the loss of product and can detect a two-tenth gallon per hour leak rate from any portion of the tank that routinely contains regulated substances; and

(2) can conduct inventory control or another test of equivalent performance in accordance with all of the following:

(a) inventory volume measurements for regulated substance inputs, withdrawals, and the amount still remaining in the AST are recorded each operating day;

(b) the equipment used is capable of measuring the level of regulated substance over the full range of the AST's height to the nearest one-eighth of an inch;

(c) the regulated substance inputs are reconciled with delivery receipts by measurement of the AST inventory volume before and after delivery;

(d) deliveries are made through a drop tube that extends to within one foot of the AST bottom, unless the AST is bottom loaded;

(e) regulated substance dispensing is metered and recorded within the state standards for meter calibration or an accuracy of six cubic inches for every five gallons of regulated substance withdrawn;

(f) the measurement of any water level in the bottom of the AST is made to the nearest one-eighth of an inch at least once a month; and

(g) practices described in the American Petroleum Institute Publication RP1621, "Bulk Liquid Stock Control at Retail Outlets" may be used, where applicable, as guidance in meeting the requirements of this section.

C. Owners and operators shall ensure a test of the proper operation of the automatic tank gauging system is performed at least annually starting three years after the effective date of these regulations and, at a minimum, as applicable to the facility, cover the following components and criteria:

(1) automatic tank gauge and other controllers: test alarm; verify system programming and configuration; test battery backup;

(2) 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 and communication with controller;

(3) vacuum and pressure pumps and gauges: ensure proper communication with sensors and controller; and

(4) Inspections and testing shall be conducted by a person who is certified as a technician by the manufacturer of the automatic tank gauging system and meets the requirements for qualified testers in 20.5.105 NMAC.

D. Owners and operator shall use one of the following to comply with Paragraph C of this section:

(1)Petroleum Equipment Institute Publication RP 1200, "Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities"; or

(2) The manufacturer's testing or inspection instructions.

E. Owners and operators shall review the monitoring reports on a monthly basis and notify the department in accordance with 20.5.118 NMAC if there is a failed or inconclusive result.

F. Owners and operator shall produce a report for all inspections and testing required in this section which includes the results of the inspection or test and it shall be maintained and submitted in accordance with 20.5.111.1111 NMAC and 20.5.111.1112 NMAC.

N.M. Admin. Code § 20.5.111.1104

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