On-Site Emissions Measurement
Stack Testing for Permitted Facilities Across Southern California
On-site emissions measurement. Mobile lab. Real-time data. Defensible results.
Measurements
What Gets Measured at the Stack
Stack testing captures what's actually coming out of your exhaust — not modeled estimates, not emission factors. Actual pollutant concentrations and mass emission rates measured under real operating conditions.
Our team sets up, follows the testing protocol, and measures the parameters required by the governing agency — SCAQMD, CARB, or EPA.
Measurements include:
- Measurement site and traverse-point assessment (SCAQMD Methods 1.1–1.2)
- Stack gas velocity and volumetric flow rate (SCAQMD Methods 2.1–2.3)
- Moisture content (SCAQMD Method 4.1)
- Molecular weight determination — O2, CO2 (SCAQMD Method 3.1)
- Particulate matter — PM (condensable or non-condensable), PM10 (SCAQMD Methods 5.1–5.3)
- Combustion gases — NOx, CO, O2, CO2, SO2 (SCAQMD Method 100.1)
- Organics — TNMNEOC, ROGs (SCAQMD Methods 25.1 & 25.3)
- Air toxic contaminants — metals, formaldehyde, dioxins, HCl, PAHs
SCAQMD requires this data — depending on your permit to operate — to verify your equipment meets its emission limits.
Equipment Expertise
We Know the Equipment Because We've Tested It
After 28 years in Southern California, there aren't many permitted unit types we haven't seen from the platform.
Boilers and steam generators
Firetube, watertube, package units (Rules 1146/1146.1)
Process heaters
Refinery heaters, thermal oxidizers, afterburners
Ovens and furnaces
Curing, annealing, calcining
Turbines
Gas, micro, combined heat and power
IC engines
Diesel generators, natural gas
Control devices
SCR, SNCR, catalytic oxidizers, baghouses, scrubbers, HEPA filters
Spray booths and coating lines
Rule 1147
Incinerators and waste-to-energy
Combustion and thermal treatment
Different units need different methods and different operating conditions during the test. Getting that match wrong wastes everyone's time.
Our Equipment
The Mobile Lab
Our lab is a fully equipped emissions monitoring platform that rolls up to your facility. Continuous gas analyzers for NOx, CO, SO2, O2, CO2. Chemiluminescence, NDIR, UV absorption, paramagnetic detection. Multi-channel data recorders. Wet chemical and non-chemical sampling trains for moisture, particulate, and toxic work. Sample lines to 300+ feet.
On-site analysis gives you preliminary results during the test. You'll know whether your unit is meeting limits before we leave.
Get Scheduled
What needs testing? When is the deadline? We'll have a scope and quote to you within 24 hours.