Alternative Methods of Release Detection for Field-Constructed Tanks

PURPOSE: This rule contains the new options for release detection for the previously deferred field-constructed tanks and airport hydrant fuel distribution systems. (1) Owners and operators of field-constructed tanks with a capacity greater than fifty thousand (50,000) gallons may use one (1) or a combination of the following alternative methods of release detection: (A) Conduct an annual tank tightness test that can detect a one-half- (0.5-) gallon-perhour leak rate; (B) Use an automatic tank gauging system to perform release detection at least every thirty (30) days that can detect a leak rate less than or equal to one (1) gallon-per-hour. This method must be combined with a tank tightness test that can detect a two-tenths- (0.2-) gallon-per-hour leak rate performed at least every three (3) years; (C) Use an automatic tank gauging system to perform release detection at least every thirty (30) days that can detect a leak rate less than or equal to two (2) gallons-per-hour. This method must be combined with a bulk tank tightness test that can detect a twotenths- (0.2-) gallon-per-hour leak rate performed at least every two (2) years; (D) Perform vapor monitoring, with an added tracer chemical, conducted in accordance with 10 CSR 26-2.043 subsection (1)(F), capable of detecting a one-tenth- (0.1-) gallon-per-hour leak rate at least every two (2) years; (E) Perform inventory control, conducted in accordance with Department of Defense Directive 4140.25; ATA Airport Fuel Facility Operations and Maintenance Guidance Manual, at least every thirty (30) days that can detect a leak equal to or less than onehalf percent (0.5%) of flow-through. When using this method, the following must also be met: 1. Perform a tank tightness test that can detect a one-half- (0.5-) gallon-per-hour leak rate at least every two (2) years; or 2. Perform vapor monitoring or groundwater monitoring in accordance with 10 CSR 26-2.043 subsection (1)(F) or (G), respectively, at least every thirty (30) days; and (F) Another method approved by the department if the owner and operator can demonstrate that the method can detect a release as effectively as any of the methods allowed in subsections (A) through (C) of this section. In comparing methods, the department shall consider the size of release that the method can detect and the frequency and reliability of detection. If the method is approved, the owner and operator must comply with any conditions imposed by the department on its use. AUTHORITY: sections 319.105, 319.107, and 319.137, RSMo 2016.* Original rule filed Aug. 15, 2016, effective May 30, 2017. *Original authority: 319.105, RSMo 1989; 319.107, RSMo 1989, amended 1994; and 319.137, RSMo 1989, amended 1993, 1995, 2004.