Subpart GG or 6H: Which Air Toxics Rule Governs Your Aerospace Coating Line
Subpart GG applies only to aerospace facilities that are major sources of HAP. Below 10 and 25 tons per year, Subpart 6H governs instead. Here is how to run the test.
EHS Insights & Compliance Updates
Industry news, compliance guidance, and best practices from iSi Environmental's expert team
Subpart N, Subpart 6W, and OSHA Cr(VI): Sorting a Plating Shop Tank by Tank
Chrome plating and anodizing fall under 40 CFR 63 Subpart N even at area sources. The rest of the shop falls under 6W. How to tell which rule covers which tank.
Commercial Mold Remediation in Kansas: What Is Required and What Is Not
A water loss in a Kansas commercial building raises one question above all others: what has to happen before people can use the space again. The answer is not a regulatory number, because no federal mold standard exists.
Lead Paint in Commercial and Industrial Renovation: Which Rules Reach Your Building
EPA's RRP rule does not cover most commercial or industrial buildings. Here is what governs a plant renovation instead: OSHA 29 CFR 1926.62 and RCRA waste testing.
When to Test Indoor Air for Mold, and What the Results Can Actually Prove
There is no federal mold standard and no legal limit for airborne mold. Here is what air, surface and bulk samples establish in a commercial building, what they cannot establish, and the three situations where sampling is worth the money.
Lead in Construction: What 29 CFR 1926.62 Requires Before Your First Sample Comes Back
OSHA's construction lead standard presumes exposure for named demolition, blasting and torch-cutting tasks and demands full protection on day one, before any lab result exists.
Spray Booth Air Permits: How to Calculate Potential to Emit and Find Your State's Trigger
A new spray booth usually needs state pre-construction authorization before install. Run the potential to emit math, then check the trigger in six states.
Your Shop Just Switched to Stainless: When OSHA Requires Welding Fume Sampling for Cr(VI) and Manganese
A stainless or chrome-alloy changeover triggers additional exposure monitoring under 29 CFR 1910.1026(d)(2)(vi). What that means for Cr(VI), manganese, and who gets sampled.
Colorado Class VI Primacy Starts November 12. Your CO2 Compressor Building Still Answers to Federal OSHA.
Colorado's ECMC takes over Class VI carbon storage well permits on November 12, 2026. Here is what OSHA still requires at your CO2 capture and compression skid.
Missouri Narrowed the Air Permit Exemption for Emergency Generators in 2026. One Unit Still Passes.
Missouri narrowed its construction permit exemption for emergency generators on January 30, 2026. One generator still qualifies. Two or more is a calculation.
Two Kansas Counties Flagged Under the 9.0 Microgram PM2.5 Standard, With Final Designations Due February 2027
EPA flagged monitors in Sedgwick and Wyandotte counties under the 9.0 ug/m3 PM2.5 standard. Kansas designations go final February 6, 2027. What changes.
No OSHA Lightning Standard: Writing a Weather Stop-Work Policy That Holds Up
OSHA has no lightning standard. The exposure sits in how you handle the worker who stops for thunder, and in what your written weather plan actually says.
Two Ozone Classifications, One Plant: The 25 Ton Threshold Houston and Dallas Fort Worth Sources Are Permitting Against Right Now
Houston and Dallas Fort Worth sit in two ozone nonattainment classifications at once, so the binding air permitting threshold is 25 tpy of VOC or NOx, not 50.
EPA Reopened the Gasoline Distribution NESHAP. Your First LDAR Survey Is Still Due May 8, 2027.
EPA's September 2026 gasoline distribution NESHAP reconsideration reopened control-device rules and left the May 8, 2027 first LDAR survey date in place.
There Is No Kansas Phosphorus Number: How a Lower Arkansas TMDL Sets Your NPDES Limit
Kansas publishes no numeric stream phosphorus criterion, so a revised Lower Arkansas TMDL sets the wasteload allocation your next NPDES renewal must match.
What OSHA's New Naloxone Guidance Asks of Your Workplace First Aid Program
OSHA Fact Sheet 4519 recommends stocking opioid overdose reversal medications. No OSHA standard requires naloxone. Here is what your first aid program owes.
EPA Asks About Alternatives to TCLP Testing: What the LEAF Methods Mean for Your Hazardous Waste Determinations
EPA's September 2026 notice asks whether LEAF leaching methods could support an alternative to TCLP testing for industrial landfill waste. Nothing changes yet.
EPA's Final Rule on Title V Applicable Requirements: Which NSR Conditions Are Now Insulated and Which Stay Contestable
EPA's final Title V applicable requirements rule is effective October 26, 2026. NSR permit terms become final only where a permit had public notice and comment.
Thirty Dry Days: How the 2026 WOTUS Supplemental Proposal Redefines Relatively Permanent Waters
EPA's September 2026 WOTUS supplemental proposal would define relatively permanent waters as perennial, with a single 30-day dry period. Comments close October 9.
The OSHA 15-Day Records Clock Is Two Different Rules: What Happens When an Employee Asks for Their Exposure File
Federal OSHA gives you fifteen working days to explain a delay, not to produce the record. California gives fifteen calendar days, hard. Here is the difference.
Naming a Chemical Hygiene Officer Is Element Seven of Eight: What 1910.1450 Actually Requires a Laboratory to Write Down
OSHA requires eight specific elements in a laboratory chemical hygiene plan, plus an annual effectiveness evaluation most labs cannot evidence. All eight here.
Class I Injection Wells: Permit Rules, State Agency Splits, and the Arbuckle Pressure Problem
Class I injection well permitting, state by state: a different agency in Kansas, Oklahoma, Texas and Nebraska, EPA direct in Colorado, and banned in Missouri.
Lead and Copper Rule Improvements: Service Line Inventory Rules for Facilities That Own Their Water
If your plant, school, or campus runs its own well, federal lead service line inventory rules already apply. EPA is enforcing now. Here is how to check.
Deleted From the Superfund NPL Is Not Clean: What Buyers and Lenders Have to Check Before Closing
NPL deletion is a rulemaking. What a buyer, lender, or developer has to verify on a delisted or partially delisted Superfund parcel before closing.