Each method of release detection for tanks used to meet the requirements of section 33-24-08-31 must be conducted in accordance with the following:
(NOTE: Practices described in the American Petroleum Institute , Recommended Practice RP 1621, "Bulk Liquid Stock Control at Retail Outlets", may be used, where applicable, as guidance in meeting the requirements.)
Nominal Tank Capacity | Minimum Duration of Test | Weekly Standard (one test) | Monthly Standard (average of four tests) |
550 gallons or less | 36 hours | 10 gallons | 5 gallons |
551-1,000 gallons (when tank diameter is 64 inches) | 44hours | 9 gallons | 4 gallons |
551-1,000 gallons (when tank diameter is 48 inches) | 58 hours | 12 gallons | 6 gallons |
551-1,000 gallons (also requires periodic tank tightness testing) | 36 hours | 13 gallons | 7 gallons |
1,001-2,000 gallons (also requires periodic tank tightness testing) | 36 hours | 26 gallons | 13 gallons |
N.D. Admin Code 33-24-08-33
General Authority: NDCC 23-20.3-03, 23-20.3-04.1
Law Implemented: NDCC 23-02.3-04.1