ASTM D7953-20 (2024) PDF

Full title and description

Standard Practice for Electrical Leak Location on Exposed Geomembranes Using the Arc Testing Method — ASTM D7953-20 (reapproved 2024). This practice describes a performance-based electrical arc-testing technique used to locate holes, punctures, seam defects and other breaches in exposed geomembranes by applying a high-voltage electrical potential and detecting arc events where the geomembrane is breached.

Abstract

ASTM D7953 provides a concise, performance-focused procedure for conducting electrical arc tests (arc testing) on exposed, dry geomembranes to detect and locate leaks. The standard explains key definitions, required preparations, general test principle, safety considerations, and limitations of arc testing compared with other electrical leak-location methods. Practical applications and vendor systems implementing the arc-test principle (arc/voltaic testers) are commonly used for quality assurance and post‑installation leak surveys of geomembrane liners.

General information

• Status: Active (D7953-20, reapproved/updated 2024; listed as D7953-20R24 on ASTM document pages).
• Publication date: Original designation 2020; reapproved/last updated Nov 7, 2024 (reapproval notice/version suffix R24).
• Publisher: ASTM International (Committee D35, Subcommittee D35.10 — Geosynthetics / Geomembranes).
• ICS / categories: Geosynthetics / Geotextiles area (ICS code typically associated: 59.080.70 for related geosynthetic products).
• Edition / version: D7953-20 (reapproved 2024) — sometimes shown as D7953-20R24.
• Number of pages: 4.

Scope

This practice is a performance-based electrical method for locating leaks (holes, punctures, seam defects, tears, cuts, cracks and similar breaches) in exposed geomembranes used in basins, ponds, tanks, landfill cells and other containment facilities. It applies to a wide range of geomembrane materials (polyethylene, polypropylene, PVC, CSPE, bituminous geomembranes, etc.) provided the installation and site preparations permit electrical testing. The standard is intended for use as a quality assurance/quality control method; it does not by itself verify material or seam strength and requires appropriate safety procedures for high-voltage operations.

Key topics and requirements

• Principle of arc testing: apply a high-voltage electrode above the dry geomembrane and a conductive reference/ground beneath; an electrical arc or discharge occurs at a breach and is detected and located.
• Definitions and terminology specific to electrical leak location and geomembrane installations (leak, electrode, conductive-backed geomembrane, artificial leak, etc.).
• Preparations and site requirements: clean, dry and exposed surface; a sufficiently conductive subgrade or conductor beneath the geomembrane; attention to overlaps, seams and field-welded areas.
• Limitations and applicability: best for exposed/dry liners; performance can be equipment- and condition-dependent (some arc-test systems/vendors report capability to detect leaks with small separations between membrane and conductive surface — vendor-dependent claims exist).
• Safety and operator qualifications: high-voltage equipment is used; qualified, trained personnel and site safety procedures are required to avoid electrical hazards.
• Reporting and documentation: recommended recording of survey grid, test parameters, detected leak locations, reference marks and any artificial test holes used for calibration/verification.

Typical use and users

Used by geotechnical and environmental engineers, QA/QC technicians, liner installation crews, independent testing/inspection firms and environmental consultants for post-installation surveys and routine integrity checks of geomembrane liners in landfills, ponds, process tanks, canals and other containment facilities. The method is commonly selected when the geomembrane is exposed and dry and when full-surface electrical testing is required without flooding or water-coverage methods.

Related standards

Standards addressing other electrical leak-location methods and related topics include: ASTM D7703 (water lance method for exposed geomembranes), ASTM D7240 (spark test / conductive-backed geomembranes), and earlier/related practices such as D7002 series and terminology standards (D4439). These standards are developed under the same ASTM D35 geosynthetics committee and are commonly referenced together when specifying leak-location surveys.

Keywords

arc testing, arc tester, electrical leak location, geomembrane, exposed geomembrane, leak detection, liner integrity survey, HDPE liner, PVC liner, spark test, QA/QC, geomembrane survey, D7953.

FAQ

Q: What is this standard?

A: ASTM D7953-20 (reapproved 2024) is the ASTM Standard Practice that defines a performance-based electrical arc-testing procedure for locating leaks in exposed geomembranes.

Q: What does it cover?

A: It covers the arc-testing principle, terminology, site and equipment considerations, limitations, safety notes and reporting guidance for detecting holes, punctures, seam defects and similar breaches in exposed, dry geomembranes used in containment applications.

Q: Who typically uses it?

A: Geotechnical/environmental engineers, QA/QC inspectors, liner installation contractors, third‑party testing firms and environmental consultants performing liner integrity surveys and post‑installation leak location.

Q: Is it current or superseded?

A: The D7953-20 edition (original 2020) is shown as reapproved/updated in 2024 (document referenced as D7953-20R24 on ASTM pages) and is listed as active on ASTM's standards pages. Users should always confirm the exact active designation and any errata via ASTM or the issuing committee prior to specification.

Q: Is it part of a series?

A: Yes — it is part of the suite of ASTM electrical leak-location practices for geomembranes (committee D35, subcommittee D35.10). Related practices include water-lance and spark-test methods (e.g., D7703, D7240) and earlier versions of D7953.

Q: What are the key keywords?

A: Arc testing, electrical leak location, geomembrane, exposed liner, leak detection, liner survey, D7953.