Chemical compliance guides for EHS managers
Plain answers to the federal reporting questions that come up every Tier II season and every time a new chemical is requested. Each guide cites the regulation it relies on.
Tier II and EPCRA
Tier II reporting: who must file, thresholds, and the March 1 deadline
The 10,000-lb and 500-lb thresholds, what counts toward them, who receives the report, and the hazard category change for calendar year 2027.
How to count mixtures for Tier II
The 40 CFR 370.14 rules, SDS concentration ranges, and a worked example totaling one CAS number across three products.
EPCRA 311 notification
The one-time SDS or list due within three months of a first threshold crossing, and when it must be updated.
EPCRA 302 EHS and threshold planning quantities
What a TPQ is, the 60-day notice, how solids are counted, and how the TPQ relates to the Tier II threshold.
Thresholds and conversions
Chemical reporting thresholds compared
EPCRA 302, Tier II, TRI, RMP, OSHA PSM, and CERCLA side by side: what each measures, its basis, scope, and deadline.
Converting gallons to pounds
Specific gravity × 8.34, where the 8.34 comes from, and how to use each density unit found in SDS Section 9.
Chemical approval
Screen a new chemical before purchase
An eight-step checklist for checking a requested chemical against EPCRA, RMP, PSM, TRI, RCRA, fire code, and permit limits before the order is placed.
These guides summarize federal requirements for general information. States can set lower thresholds or extra requirements, and they are not legal advice.