N.M. Admin. Code § 20.5.114.1407

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

Section 20.5.114.1407 - METHODS OF RELEASE DETECTION FOR UST SYSTEMS WITH FIELD-CONSTRUCTED TANKS

A. Owners and operators of field-constructed tanks with a capacity less than or equal to 50,000 gallons shall meet the release detection requirements in 20.5.108 NMAC.

B. Owners and operators of field-constructed tanks with a capacity greater than 50,000 gallons shall meet either the requirements in 20.5.108 NMAC (except 20.5.108.806 NMAC and 20.5.108.807 NMAC shall be combined with inventory control as stated below) or use one or a combination of the following alternative methods of release detection:

(1) conduct an annual tank tightness test that can detect a 0.5 gallon per hour leak rate;

(2) use an automatic tank gauging system that can detect a leak rate less than or equal to one gallon per hour to perform release detection at least every 30 days. This method shall be combined with a tank tightness test that can detect a 0.2 gallon per hour leak rate that is performed at least every three years;

(3) use an automatic tank gauging system that can detect a leak rate less than or equal to two gallons per hour to perform release detection at least every 30 days. This method shall be combined with a tank tightness test that can detect a 0.2 gallon per hour leak rate that is performed at least every two years;

(4) perform vapor monitoring (conducted in accordance with 20.5.108.806 NMAC for a tracer compound placed in the storage tank system) capable of detecting a 0.1 gallon per hour leak rate at least every two years;

(5) perform inventory control (conducted in accordance with department of defense Directive 4140.25-M; ATA Airport Fuel Facility Operations and Maintenance Guidance Manual; or equivalent procedures) at least every 30 days that can detect a leak equal to or less than 0.5 percent of flow-through; and

(a) perform a tank tightness test that can detect a 0.5 gallon per hour leak rate at least every two years; or

(b) perform vapor monitoring or groundwater monitoring (conducted in accordance with 20.5.108.806 NMAC and 20.5.108.807 NMAC, respectively, for the stored regulated substance) at least every 30 days.

N.M. Admin. Code § 20.5.114.1407

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