New Mexico Ozone Season O&G Rules: NMED Requirements
NMED 20.2.82 NMAC requires heightened LDAR surveys and equipment controls for New Mexico oil and gas facilities during the May through October ozone season.
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The TetraSoft Blog
Regulatory updates, emissions data, and methane science.
Saltwater Disposal Wells: Counts by State and Where to Find Them
Seven states permit 45,637 saltwater disposal wells, Texas 36,918 of them. State-by-state counts, why shares differ, and the agency files behind each number.
OOOOb and OOOOc Explained: Coverage and January 2027 Deadlines
40 CFR 60 Subpart OOOOb covers oil and gas sites built after December 6, 2022. Which subpart applies, what it requires, and why most deadlines moved to 2027.
SPCC Plan Requirements: The 1,320 Gallon Threshold and Tiers
SPCC applies above 1,320 gallons of aboveground oil in 55 gallon or larger containers. At 10,000 gallons or less with a clean record, you can self-certify.
Title V and PSD Thresholds: Which Air Quality Permit Applies
Which air permit applies turns on potential to emit: Title V at 100 tpy, PSD at 100 or 250 tpy, lower in nonattainment areas, and the oil and gas site rules.
Colorado Well Permit Search: Where ECMC Keeps the Records
Colorado calls two unrelated records a well permit. Which agency holds yours, why the oil and gas search covers only 12 months, and where older permits sit.
Natural Gas BTU: Wellhead Gas vs the 1,020 Btu Standard
Pipeline gas is assumed at about 1,020 Btu per cubic foot. Across 31,823 wellhead analyses, 79 per cent sit at or above it, with state medians up to 1,206.
Oil and Gas Flaring: What Flares Actually Destroy
AP-42 assumes 98% destruction and publishes no methane factor. What Subpart W requires instead, plus measured values from 99.8% down to 91.1%.
Oil and Gas Well Map: 2.8M Wells in Texas and Seven More States
No official national oil and gas well map exists. Eight state registers hold about 2.8 million wells, 1,213,035 in Texas. See them on one map with full records.
What Is Stack Testing? Methods, Rules, and Its Limits
Stack testing measures pollutant concentration and flow at one outlet under representative conditions. What the methods cover and what a result cannot show.
AP-42 Emission Factors: Gas Engines, Turbines, Boilers, Flares
AP-42 NOx, CO, VOC and methane factors for natural gas engines, turbines, boilers and flares, with table numbers, A to E ratings, and what each factor assumes.
AERMOD Emission Rates: Where the Numbers Come From
AERMOD takes an emission rate as an input and never calculates it. Where that number comes from, what AP-42 factors assume, and when it matters.
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