Direct Measurement –  Emissions Testing

This sampling technique is utilized to determine actual emission rates from various sources (i.e. separator vent, tank vessel manifold, wellhead vent etc.), and can be quantified to determine a facility’s PTE. OTA utilizes an easily transportable metering tube with size varying orifice plates designed based on the American Gas Association, Report No. 3 – Third Edition, Part 3, “Orifice Metering of Natural Gas” standards (AGA, 1992). Our proprietary calculation program utilizes the corresponding equations from Part 3 to determine flow rates. Our highly trained field technicians choose an orifice based on site-specific characteristics to ensure the vapor is measured accurately. A data logger is installed inline, downstream of the orifice at a precisely located tap hole to measure pressure and temperature differentials. Readings are measured in increments contiguously over a twenty-four hour testing period. This measuring technique yields detailed vapor flow results that show total, incremental, and peak flows.

A natural gas sample is extracted directly from the tank battery by securely fastening a vacuum pumped sample cylinder to the single point of emission, impeding atmosphere contamination.

This test measures the storage vessels’ working, breathing, and flash emissions.

LOCAL regulatory and compliance support FOR the oil and gas sector. WE HAVE field offices established in THE major basins