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Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities 1. INTRODUCTION 1.1 Origin. The Petroleum Equipment Institute (PEI) hag produced this document as an industry service. It has been prepared in response to requests from underground storage tank (UST) system operators, tank testers and regulators for a single authoritative source of informa- tion. The recommended practices described herein represent a synthesis of industry procedures and manufacturers' recommendations relating to spill, overfill, leak detection and secondary containment equipment. These practices are the consensus recommendations of the PEI Overfill, Release Detection and Release Prevention Equipment Testing Committee. The Committee is made up of representatives from equipment suppliers, tank owners, leak detection and release prevention testers, industry - related associations and the regulatory community. In addition, the Committee has had the benefit of comments submitted by parties interested in leak detection and release prevention equipment. In instances where there were differences or omissions in material available from existing sources, the PEI Overfill, Release Detection and Release Prevention Equipment Testing Committee has included its own consensus recommendations based on the practical experience of committee members. 1.2 Background. Spill, overfill, leak detection and secondary containment equipment is currently employed at UST facilities as required by local, state and federal regulations. For this equipment to be operated effectively and safely, it must be maintained, inspected and tested for proper operation on an ongoing basis. 1.3 Purpose. The purpose of this document is to provide a concise summary of general guidelines for the inspection and testing of spill, overfill, leak detec- tion, secondary containment equipment, shear valves and emergency stops at UST facilities. This information has been assembled from published and unpublished sources provided by equipment suppliers, experienced testing contractors, UST owners/operators and authori- ties having jurisdiction (AHJs). The intent is to provide recommended practices to facility operators and testing personnel that: • protect the environment; • promote the safe and reliable operation of systems; • prevent spills and overfills associated with deliveries to a UST; • prevent damage to property and equipment. This document is not intended to: • endorse or recommend particular materials, equipment, suppliers or manufacturers; • discourage the development or installation of new equipment or overfill prevention and leak detection devices; • discourage the development of new or improved testing procedures and equipment. 1.4 Scope. These recommended practices apply to facilities that are equipped with USTs used for the stor- age of motor fuels, jet fuels, distillate fuel oils, residual fuel oils, lubricants, petroleum solvents, oils and other petroleum products. These recommended practices apply to: • USTs; • connected underground piping; • underground ancillary equipment and containment systems; • equipment from the dispenser shear valve and below. These recommended practices do not apply to: • mobile tank fuel dispensing systems (e.g., truck- mounted refuelers); • aboveground storage tanks; • tanks containing refrigerated liquids, liquefied petroleum gases, liquefied natural gases or compressed natural gases; • dispensing equipment above the shear valve. These recommended practices are not intended to address the design, installation or day-to-day operation of UST systems. Nonetheless, it is important to consider the design and operational characteristics of an underground tank system when specifying overfill prevention, release prevention and leak detection equipment. The test methods in this recommended practice relative to integrity testing of spill buckets, containment sumps and secondary containment are based on current industry practices and are intended to demonstrate that a leak from the primary containment will be detected before it reaches the environment. If an AHJ requires components to meet specific leak detection standards, follow the requirements in the AHJ's regulation. peLorg 0