LDAR (Leak Detection and Repair)

Gas Leak Detection (Helium and Others)

Refrigeration Systems

Compressed Air Systems



LDAR (Leak Detection and Repair)

Regulatory standards such as Maximum Achievable Control Technology (MACT), National Emissions Standards for Hazardous Air Pollutants (NESHAP), New Source Performance Standards (NSPS), and others require the monitoring and reporting of fugitive emissions from process equipment. Chemical plants, hazardous waste facilities, refineries, natural gas processing plants, among others, are required to implement and maintain LDAR programs for affected equipment to control and reduce emissions of volatile organic compounds (VOCs), hazardous air pollutants (HAPs), and inorganic compounds.

LDAR programs are implemented to comply with these environmental regulations for reducing the fugitive emissions of targeted chemicals into the environment. Process equipment subject to LDAR, such as pumps, valves, flanges, pressure relief devices, etc. is periodically monitored to detect leaks, which are then required to be repaired within a specified time period. The environmental regulations that prescribe Leak Detection and Repair as a means of reducing emissions have very specific standards that must be applied. These LDAR standards normally define:

  • Chemical streams that must be monitored
  • Types of components to be monitored (pumps, valves, flanges,    connectors, etc.)
  • Leak definition (concentration measured in parts per million that    indicates a leak)
  • Frequency of monitoring
  • Method of monitoring
  • Action to be taken if a leak is detected
  • Length of time in which an initial attempt to repair the leak must be    made
  • Length of time in which a successful repair of the leak must be    performed
  • Actions that must be taken if a leak cannot be repaired within the    specified time frame
  • Record keeping and reporting requirements
  • The LDAR experts at Emissions Monitoring Technologies, Inc. utilize state of the art equipment, highly qualified and trained personnel, and protocols designed specifically to help industrial facilities comply with these complex LDAR requirements. Emissions Monitoring Technologies, Inc. provides quality Leak Detection and Repair services through programs custom designed for each customer's individual needs.

    Emissions Monitoring Technologies, Inc. LDAR services include:

  • Process system review (to determine equipment applicability)
  • Equipment identification
  • Database generation (of all data specific to each affected component)
  • Leak detection monitoring using portable monitoring instruments and    methods specified in EPA Method 21
  • Maintenance and/or repair services on leaking components
  • Data management
  • Extensive reporting services
  • Emissions estimate calculations
  • Training Programs
  • Auditing Programs (including third party auditing of existing programs)
  • For more information on how Emissions Monitoring Technologies, Inc. can provide cost effective solutions to your leak detection problems, call (800) 497-4407 or email