LDARprogram

LDAR program stands for Leak Detection and Repair program. It is a systematic process used by facilities that handle volatile organic compounds (VOCs) to identify, quantify, and repair fugitive emissions from equipment such as valves, flanges, pumps, compressors, connectors, tanks, and pressure-relief devices. The goal is to minimize VOC emissions, protect air quality, improve safety, and ensure compliance with applicable environmental regulations.

A typical LDAR program includes asset inventory, screening surveys, leak definitions and thresholds, repair timelines, verification testing, and recordkeeping. Surveys are conducted at scheduled intervals using screening methods such as portable hydrocarbon detectors (Method 21) or infrared optical gas imaging cameras. A component is deemed leaking if the screening reading exceeds regulatory thresholds, which vary by rule and component type; many programs use a threshold around 10,000 ppmv for VOCs. Leaks are repaired within prescribed timeframes and re-surveyed to verify repair.

Programs may be based on national or state regulations, industry standards, or company policy. In the United States, LDAR requirements apply to many oil and gas, refinery, and chemical facilities under the Clean Air Act and associated state implementations; other regions have their own rules.

Advantages include reduced fugitive emissions, improved compliance, reduced environmental impact, and potential operational savings. Challenges involve maintaining accurate component inventories, scheduling surveys, weather and access constraints, and ensuring timely repairs and proper documentation.

LDAR programs continue to evolve with advances in detection technologies, such as handheld meters, optical gas imaging, and automated data management to support auditing and continuous improvement.