ARSD 74:56:03:13. Overfill control

Overfill control is required on all AST systems to prevent inadvertent or accidental releases during filling. The requirements are as follows: (1) All owners or operators must ensure that releases due to overfills do not occur. The owners or operators must ensure that the volume available in the tanks will contain the volume of regulated substance to be transferred to the tanks; and (2) Overfill control required in accordance with § 74:56:03:04 for AST systems shall utilize one or more of the following overfill prevention devices or methods; (a) Tanks gauged at frequent intervals by personnel during regulated substance transfer who are in communication with the supplier so that flow may be shut down or diverted; (b) Tanks equipped with high level detection devices independent of other gauging equipment. Alarms shall be located either on-site or remote so that the flow of regulated substance may be stopped or diverted; or (c) An equivalent device or system, approved by the department, designed to prevent releases due to overfills.