Reference Documentation
US Tier II Reporting FAQ
Frequently Asked Questions
- Which facilities must file a Tier II inventory?
- Any facility required to keep a Safety Data Sheet under the OSHA Hazard Communication Standard, where a hazardous chemical was present at or above 10,000 pounds at any time during the reporting year, or where an Extremely Hazardous Substance was present at or above 500 pounds or its Threshold Planning Quantity — whichever is lower. States may impose lower thresholds; verify with your SERC.
- How does the Tier II threshold determination work?
- For each chemical CHEMPAC compares the maximum amount on site against the applicable threshold: 10,000 lb for a general hazardous chemical, or the lower of 500 lb and the Section 302 Threshold Planning Quantity for an Extremely Hazardous Substance. Every chemical is printed with its threshold, its maximum amount and a reportable / not-reportable determination.
- What identifier formats does the tool require?
- CAS numbers must follow ####-##-# and the check digit is verified arithmetically — the weighted mod-10 sum defined by CAS — so a transposed or mistyped number is rejected rather than merely pattern-matched. Hazard classes follow OSHA HazCom 2012 (29 CFR 1910.1200 Appendix A and B) notation, for example Flammable Liquid Category 2 or Acute Toxicity Category 3.
- What stops me generating an invalid report?
- Step 2 of the wizard runs pre-flight validation on every row as you type, separating blocking errors — an invalid CAS check digit, a missing chemical name or storage location, a negative amount, a missing state — from advisory warnings such as an over-threshold chemical without hazard classes. Blocking errors prevent generation entirely.
- Does CHEMPAC file my Tier II report with the EPA or my state?
- No. CHEMPAC formats your entered data into a standardised inventory layout. Filing with your State Emergency Response Commission, Local Emergency Planning Committee and local fire department — including any state e-filing system such as Tier2 Submit or a state portal — remains entirely your responsibility, which you acknowledge before generating a report.
- Which units should amounts be entered in?
- Pounds. Kilograms, tons and gallons are accepted and converted to pounds for the threshold comparison; gallons are treated as approximately 8.34 lb per gallon unless you enter the weight directly.
- What is the difference between the tiers?
- Standard ($99) produces the multi-page PDF inventory report including the Tier II threshold determination. The Audit-Ready Bundle ($329) delivers a complete compliance dossier as a single ZIP: the inventory report, the threshold determination workbook, the OSHA HazCom classification annex, the change register, an audit evidence sheet carrying the SHA-256 integrity hash, a draft SERC / LEPC cover letter, a state filing checklist, and machine-readable CSV and JSON data.
- Is there an annual licence for larger operators?
- Yes. The Enterprise licence ($5,400 per year) covers unlimited facilities and reports, a REST API for automated submission from your ERP or EHS system, issued and revocable API keys with per-call usage accounting, and on-premise or private-cloud deployment.
- Is the annual filing deadline handled?
- Tier II reports are due by March 1 each year for the preceding calendar year. CHEMPAC defaults the reporting year to the previous calendar year and retains every filed inventory so the following year's report starts from last year's register as a revision.
Mandatory Legal Notice — EPA / EPCRA / OSHA HAZCOM
LEGAL NOTICE: CHEMPAC INVENTORY SYSTEM formats operator-provided data into a standardised EPCRA Tier II hazardous chemical inventory layout for informational and internal record-keeping purposes. It does not constitute legal, environmental, or regulatory certification, and it does not file anything on your behalf. Amounts, OSHA Hazard Communication (29 CFR 1910.1200) classifications, and EPCRA reporting thresholds — including Section 302 Threshold Planning Quantities — must be verified against EPA guidance, 40 CFR 370 and applicable state implementing law. The facility owner or operator is solely responsible for filing this inventory with the State Emergency Response Commission, the Local Emergency Planning Committee and the local fire department by the March 1 deadline.