A: Electronic Leak Detection (ELD) is a portable quality control testing procedure designed to locate discontinuities (breaches, holes, seam voids) in waterproofing and roofing membranes. ELD determines the location of the breaches by applying an electrical current to the surface of the exposed membrane. ELD may also be referred to as: electronic water test, electronic breach detection, membrane integrity testing, membrane integrity survey and electrical conductance testing. Electronic Leak Detection (ELD) encompasses both low voltage and high voltage methods.