N.M. Admin. Code § 20.5.108.809

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

Section 20.5.108.809 - STATISTICAL INVENTORY RECONCILIATION (SIR) FOR UST SYSTEMS

A. Owners and operators of underground storage tanks may use release detection methods based on the application of statistical principles to inventory data similar to those described in 20.5.108.802 NMAC. Owners and operators who use SIR shall:

(1) comply with the requirements in Subsections B through G of 20.5.108.802 NMAC;

(2) use a third-party certified quantitative method;

(3) use a third-party vendor to analyze the data and include the name of the SIR provider and the name and version of the SIR method used for analysis;

(4) use a method that is capable of detecting a leak rate of two-tenths gallon per hour or a release of 150 gallons within 30 days;

(5) use a method with a threshold that does not exceed one-half the minimum detectible leak rate; and

(6) use a method that reports a quantitative result with a calculated leak rate.

B. Owners and operators shall ensure that the data is collected, analyzed, and reported within the same 30-day period in order to check for releases at least monthly.

C. Owners and operators shall:

(1) notify the department within 24 hours of discovery of an inconclusive or fail result;

(2) provide the department all data collected for the statistical analysis where the results are either inconclusive or fail and identify any further investigation necessary to determine whether there is a suspected release as part of the seven-day report required in 20.5.118 NMAC;

(3) perform an investigation within 14 days of receiving an inconclusive result, or another time frame approved in advance by the department to determine whether a suspected release should be investigated under 20.5.118 NMAC; and

(4) report a suspected release to the department within 24 hours in accordance with 20.5.118 NMAC if the investigation indicates a fail result.

D. Owners and operators shall inspect all mechanical equipment and test all electronic equipment annually to ensure proper operation and calibration.

E. Qualitative SIR methods are no longer accepted as meeting the requirements for monthly monitoring.

F. Owners and operators shall maintain results and records of monthly monitoring in accordance with 20.5.108.815 NMAC and 20.5.108.816 NMAC, and shall provide them to the department upon request.

N.M. Admin. Code § 20.5.108.809

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