N.M. Admin. Code § 20.5.114.1408
Current through Register Vol. 35, No. 23, December 10, 2024
Section 20.5.114.1408 - METHODS OF RELEASE DETECTION FOR PIPINGA. Owners and operators of underground piping associated with USTs with field-constructed tanks less than or equal to 50,000 gallons shall meet the release detection requirements in 20.5.108 NMAC.B. Owners and operators of underground piping associated with airport hydrant systems and USTs with field-constructed tanks greater than 50,000 gallons shall follow 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) Perform a semiannual or annual line tightness test at or above the piping operating pressure in accordance with the table below. Maximum Leak Detection Rate Per Test Section Volume |
Test Section Volume (Gallons) | Semiannual Test - Leak Detection Rate Not to Exceed (Gallons Per Hour) | Annual Test - Leak Detection Rate Not to Exceed (Gallons Per Hour) |
< 50,000 | 1.0 | 0.5 |
>= 50,000 to < 75,000 | 1.5 | 0.75 |
>= 75,000 to < 100,000 | 2.0 | 1.0 |
>= 100,000 | 3.0 | 1.5 |
(2) Piping segment volumes greater than or equal to 100,000 gallons not capable of meeting the maximum 3.0 gallon per hour leak rate for the semiannual test shall test according to the following schedule: (a) First test shall be conducted no later than three years after the effective date of these regulations and the leak rate the test shall be no greater than six gallons per hour.(b) Second test shall be conducted no later than six years after the effective date of these regulations and the leak rate for the test shall be no greater than six gallons per hour.(c) Third test shall be conducted no later than seven years after the effective date of these regulations and the leak rate for the test shall be three gallons per hour.(d) Subsequent tests conducted after seven years from the effective date of these regulations shall be semiannual or annual and conducted in accordance with Subparagraph (1) of this section.(3) 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;(4) 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 line tightness test (conducted in accordance with Paragraph (1) of this section using the leak rates for the semiannual test) 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; or(5) Another method approved by the implementing agency if the owner and operator can demonstrate that the method can detect a release as effectively as any of the methods allowed in Paragraphs (1) through (4) of this section. In comparing methods, the implementing agency shall consider the size of release that the method can detect as well as the frequency and reliability of detection. C. Owners and operators of hybrid storage tank systems shall meet release detection requirements for the piping between the above ground tank and the underground tank as follows: (1) existing above ground piping may be monthly monitored by use of visual inspection if the requirements in 20.5.111.1102 NMAC are met; or(2) existing underground piping shall meet the requirements for release detection in 20.5.108 NMAC.N.M. Admin. Code § 20.5.114.1408
Adopted by New Mexico Register, Volume XXIX, Issue 14, July 24, 2018, eff. 7/24/2018