1.1 This standard practice describes standard procedural guidelines for placement of blind actual leaks during electrical leak detection surveys to locate leaks in geomembranes. The geomembranes can be bare (not covered) or can be covered with water or earth materials containing moisture. 1.2 This standard guide is intended to ensure that leak location surveys are always performed with demonstrated leak detection capability. To allow continuing innovation, and because various leak detection practitioners use a wide variety of equipment to perform these surveys, placement of blind actual leaks ensures that the minimum leak detection performance is demonstrated during the survey. 1.3 This standard guide is intended to assist individuals or groups in ensuring that leak locating surveys leaks in installed geomembranes using electrical location methods. For clarity, this document uses the term leak to mean holes, punctures, tears, knife cuts, seam defects, cracks and similar breaches through an installed geomembrane. 1.4 Leak location surveys can be used on geomembranes installed in basins, ponds, tanks, ore and waste pads, landfill cells, landfill caps, and other containment facilities. The procedures are applicable for geomembranes made of materials such as polyethylene, polypropylene, polyvinyl chloride, chlorosulfonated polyethylene, bituminous material, and other electrically-insulating materials. 1.5 WarningThe electrical methods used for geomembrane leak location could use high voltages, resulting in the potential for electrical shock or electrocution. This hazard might be increased because operations might be conducted in or near water. In particular, a high voltage could exist between the water or earth material and earth ground, or any grounded conductor. These procedures are potentially very dangerous, and can result in personal injury or death. The electrical methods used for geomembrane leak location should be attempted only by qualified and experienced personnel. Appropriate safety measures must be taken to protect the leak location operators as well as other people at the site. 1.6 This guide does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this guide to establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use.
1.3 This standard guide is intended to assist individuals or groups in ensuring that leak locating surveys leaks in installed geomembranes using electrical location methods. For clarity, this document uses the term leak to mean holes, punctures, tears, knife cuts, seam defects, cracks and similar breaches through an installed geomembrane.
Keywordselectrical leak location system; geomembrane; leak detection, blind actual leak
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Ballot Item Approved as D7909-2014 and Pending Publication