Field notes
Questions facility managers
actually ask.
Plain answers first. Regulatory basis, practical tests, and important nuance below.
Current field notes
Does My Facility Have to Comply with the Maricopa County Travel Reduction Program?
A practical guide to Maricopa County Travel Reduction Program thresholds, annual surveys, plan deadlines, response rates, Task Force review, and enforcement.
Read answer ↗Arizona RCRAArizona 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 ↗