Testing Types

Isokinetic

The purpose of isokinetic sampling is to capture particulates or aerosols that pass through a defined area over a given time period without altering their travel paths. The velocity of the stack gas going into the sampling probe's nozzle is equal to the velocity of the moving stack gas at that point in the stack cross sectional area. The moving stack gas is disturbed as little as possible so that the same amount of particles and aerosols go into the probe nozzle as would have passed the area of the nozzle had it not been there.

Wet Chemistry Methods

Wet chemistry methods employ either isokinetic, non-isokinetic, proportional or non-proportional integrated sample techniques. These methods are used to determine various flue gas components such as Sulfur Dioxide, Sulfur Trioxide, Dioxins and Furans, Hydrochloric Acid, Chlorine and Multi Metals. These wet chemistry methods collect the targeted contaminant in specific chemical solutions held in the sample train's impingers. After the samples are collected, the impinger contents are analyzed using a variety of advanced laboratory techniques (GC/MS, IC, GFASS, ICP, and others).

Capture/Control Efficiency

We perform pollution control efficiency testing for scrubber inlet & outlets, electostatic precipitators, baghouses, cyclone collectors and regenerative thermal oxidizers (RTOs) for VOC capture, removal and destruction, etc. Click here for more information.

Instrumental

Instrumental Analyzers are used in conjunction with EPA Protocol 1 Calibration Standard Gases to determine gaseous emissions from stationary and mobile sources. A variety of analyzer technologies are employed to accomplish this, including non dispersive infrared, gas chromatography (with flame ionization and thermal conductivity detectors), hand-held portable monitors, and any other method determined to be equivalent and approved before the test by negotiation with State and Federal Regulatory Authorities. SEAS also provides performance specification (PST) testing, relative accuracy test audits (RATA), opacity audits, and calibration gas audits (CGA) for SO2, CO, NOx, THC/VOC, O2, CO2 and Opacity CEM systems regulated by CFR Title 40 Part 60 and Part 75 standards.


Gas Flow Distribution Studies (3-D Flow)

A 3-D Probe is used to determine the velocity pressure, yaw and pitch angle of the flow velocity vector, and the temperature in a stack or duct. Yaw angle is determined directly by rotating the probe to null the pressure across a pair of symmetrically placed ports (2 & 3) on the probe head. The pitch angle is calculated using probe specific calibration curves. From these values and a determination of stack gas density, the average axial velocity of the stack gas is calculated. The average gas volumetric flow rate in the stack or duct is then determined from the average axial velocity.