Leak Finder is the solution to compliance with Subpart W

Our measurement teams utilize the best available techniques to find and quantify gas leaks. Our team members utilize proper PPE per OSHA regulations while working at facilities including butnot limited to hard hats, eye protection, hearing protection, fall protection, safety vests, and safety toe shoes.

The Task: Leak Detection on elevated equipment such as valves, storage tanks, and other equipment.

The Tool: FLIR THERMA GASFINDIR

The Rule: §98.234 – Monitoring and QA/QC requirements for use of an optical gas imaging instrument for all source types that are inaccessible and cannot be monitored without elevating the monitoring personnel more than two (2) meters above a support surface. Monitor Storage Tank Vent Stacks annually for emissions using an optical gas imaging camera for a duration of 5 minutes.


The Task: Measurement of natural gas emission or leak rates for rod packings, gas seals, and other equipment.

The Tool: The Bacharach Hi Flow Sampler.

The Rule: §98.234 (d) – Monitoring and QA/QC requirements, it is prescribed that you are to use a high volume sampler to measure emissions within the capacity of the instrument.

§98.233(o) – Centrifugal compressor venting, (3) For blow down valve leakage and unit isolation valve leakage to open ended vents, you can use a high volume sampler according to methods set forth in 98.234 (d).


The Task: To Monitor above ground metering, valve stems and other equipment.

The Tool: Infrared Laser Beam

The Rule: §98.234 (a) (3) – Monitoring and QA/QC requirements prescribe that you are to use an infrared laser beam illuminated instrument for equipment leak detection.


Final Rule: Subpart W of 40 CFR Part 98

Under this final rule to 40 CFR Part 98, owners or operators of facilities that contain petroleum and natural gas systems (as defined below) and emit 25,000 metric tons or more of GHGs per year (expressed as carbon dioxide equivalents) from process operations, stationary combustion, miscellaneous use of carbonates, and other source categories (see information sheet on General Provisions) will report emissions from all source categories located at the facility for which emission calculation methods are defined in the rule.

Owners or operators will collect emission data; calculate GHG emissions; and follow the specified procedures for quality assurance, missing data, recordkeeping, and reporting.