Missouri Code of State Regulations › Title 10 - DEPARTMENT OF NATURAL RESOURCES › Division 26 - Petroleum and Hazardous Substance Storage Tanks › Chapter 2 - Underground Storage Tanks-Technical Regulations › Section 10 CSR 26-2.043 - Methods of Release Detection for Tanks

Current through Register Vol. 49, No. 14, July 15, 2024
PURPOSE: There are two (2) primary purposes for this
				  rulemaking. The first is to open UST rules in Title 10, Division 26 of the Code
				  of State Regulations to make the necessary changes required by the U.S.
				  Environmental Protection Agency (EPA). The 2005 Energy Policy Act required
				  either financial responsibility for UST installers and manufacturers or
				  secondary containment for all new systems. In addition, last October, EPA
				  adopted changes to the federal UST regulations that need to be incorporated
				  into state regulation. This rule-making will make the necessary changes to
				  comply with these EPA grant requirements and to incorporate the changes made to
				  the federal regulations.
The second reason is to incorporate state-specific
				  changes. The proposed changes would better ensure that old tanks are still
				  functional enough to remain in use. The changes would better prevent and detect
				  leaks, establish clearer and more detailed leak detection system requirements,
				  and incorporate new technologies. The department will also take this
				  opportunity to clarify ambiguous or confusing language and update industry
				  standard referenced in the regulations.
(1) Methods of release detection for
				underground storage tanks (USTs) used to meet the requirements in
				10
				CSR 26-2.041 must be conducted as follows:
(A) Inventory Control. Regulated substance
				inventory control (or another test of equivalent performance) must be conducted
				monthly to detect a release of at least one percent (1%) of flow through plus
				one hundred thirty (130) gallons on a monthly basis in the following manner:
1. Inventory volume measurements for
				regulated substance inputs, withdrawals, and the amount still remaining in the
				tank are recorded each operating day on forms provided by the department or on
				forms previously approved by the department;
2. The equipment used is capable of measuring
				the level of regulated substance over the full range of the tank's height to
				the nearest one-eighth inch (1/8");
3. The regulated substance inputs are
				reconciled with delivery receipts by measurement of the tank inventory volume
				before and after delivery;
4.
				Deliveries are made through a drop tube that extends to within one foot (1') of
				the tank bottom;
5. Product
				dispensing is metered and recorded within the local standards for meter
				calibration or an accuracy of six (6) cubic inches for every five (5) gallons
				of product withdrawn;
6. The
				measurement of any water level in the bottom of the tank is made to the nearest
				one-eighth inch (1/8") at least once a month; and
7. The practices described in the American
				Petroleum Institute Publication 1621,
Recommended Practice for Bulk
				Liquid Stock Control at Retail Outlets
, revised 2001, may be used,
				where applicable, as guidance in meeting the requirements of this
				subsection;