Compliance field notes
Questions facility managers
actually ask.
Plain answers first. Regulatory basis, practical tests, and important nuance below.
Current field notes
Arizona Is Updating Its Hazardous-Waste Rules. Here Is What to Watch.
A five-minute guide to ADEQ's 2026 rulemaking, the federal updates in scope, and the unanswered question that could affect future fees.
Read answer ↗RCRA air emissionsWhen Do RCRA Subparts AA, BB, and CC Apply?
Three separate applicability tests for process vents, equipment leaks, tanks, surface impoundments, and containers, including the thresholds and unit-status questions that matter.
Read answer ↗RCRA air emissionsDoes a Control Device Simplify RCRA Subpart BB or CC Compliance?
What a closed-vent system and control device replace, what they add, and why the answer differs under Subparts BB and CC.
Read answer ↗Fire codeHMIS vs. HMMP: What's the Difference and Which Does My Jurisdiction Require?
The Hazardous Materials Inventory Statement lists and classifies materials; the Hazardous Materials Management Plan shows where and how they are stored, used, controlled, and accessed.
Read answer ↗RCRAIs My Wastewater Treatment Unit Exempt from RCRA Permitting? The Three-Part Test and the Dedication Question
The federal wastewater treatment unit exemption depends on a three-part definition, plus EPA's interpretation that the tank system must remain dedicated to an on-site wastewater treatment facility.
Read answer ↗