Documentation
Using RegPermit
What RegPermit does and how to use it.
What it is
RegPermit is an AI assistant for air-quality permitting and compliance. It reads the documents you upload and a corpus of federal and state air regulations, and attaches a citation to every claim and number in its output.
You ask questions in plain language. It searches your documents and the regulations, runs calculations, and returns a draft — a memo, a filled form, a table, or a modeling result.
Main parts
RegPermit has three main parts.
Scope
RegPermit produces draft work product for review. Its output is not legal advice. Citations let you verify each claim against the source before relying on it.
Projects
A project is a workspace for a single facility. You upload its permit, applications, stack tests, inventory, and correspondence. Chats and tabular reviews in a project use only that project’s documents.
Supported file types: PDF, Word, and Excel. Documents are versioned, and projects can be shared with other users.
The assistant
The assistant answers questions about a project’s documents and the regulations. Before asking, you choose a model and select which jurisdictions it may search (Sources). As it runs, it shows the documents it reads and the rules it looks up, and cites each claim in the answer.
You can attach files to a message and download the documents it produces.
Sources & citations
Every claim carries a numbered citation. Document citations 1 point to a page in an uploaded file; regulatory citations c1 point to a section of the corpus. Selecting a citation opens the source next to the answer with the quoted text highlighted.
Exported Word documents carry citations as footnotes; exported spreadsheets include a Sources sheet. “View source” opens the cited passage.
Models & coverage
Models
- Opus — highest reasoning capability; applicability, BACT, netting.
- Sonnet — default; balanced speed and capability.
- Haiku — fastest; for quick lookups.
- Tabular Review uses Gemini.
Regulatory coverage
Plus the documents you upload.
Workflows
A workflow is a saved, reusable set of instructions for a recurring task. RegPermit ships prebuilt workflows for the common air-quality tasks below, and you can save your own.
Assistant workflows
Run a prepared prompt in a chat — for example, an applicability determination or a deviation report. You get the assistant’s answer plus any documents it produces.
Tabular workflows
Run a fixed set of questions across several documents at once and get a grid back — one row per document. This is a Tabular Review (see Working with documents).
To run one, open Workflows, filter by practice or type, and select it. An assistant workflow opens a chat with its prompt already loaded; a tabular workflow asks you to pick the documents, then builds and fills the grid.
Custom workflows: copy a prebuilt workflow (or start from a blank one), edit its prompt or columns, and save it to reuse.
Permitting
Applicability, analysis, and the documents in a permit application.
Applicability
Which of NSPS, NESHAP, Title V, PSD/NSR and the GHGRP apply — each subpart cited.
Top-down BACT / RBLC
Rank control technologies through the five-step process to a proposed limit.
PSD / NSR netting
The two-step major-modification test, with a contemporaneous-change ledger.
Modification significance
Administrative, minor, significant, or major PSD/NSR per §70.7 and §52.21.
Application narrative
Process, equipment, controls, applicability and proposed monitoring.
Completeness QC
Audit a draft package against agency requirements before you submit.
Deficiency (NOD / RAI) response
A point-by-point reply to a notice of deficiency or RAI.
Fill forms
EPA, NM, TX, UT, and CO templates, filled to a PDF.
Does NSPS Subpart Dc apply to a new 95 MMBtu/hr natural-gas boiler?
Compliance & reporting
Extracting obligations from a permit and drafting the required reports.
Title V obligations
Every monitoring, recordkeeping and reporting obligation in one cited table.
Deviation report
A fileable §71.6 report: cover, deviation table, cause, corrective action.
Annual certification
The §70.6(c)(5) compliance certification with a per-requirement table.
Semiannual monitoring report
The §70.6(a)(3)(iii)(A) report with a deviation log.
SSM / excess-emissions report
A startup, shutdown or malfunction report per §60.7(c).
What monitoring and reporting does my Title V permit require, and when?
Emissions & calculations
Emission calculations and inventories, with each factor and control cited.
Potential to emit
Each unit’s maximum capacity to emit vs the major-source threshold.
Emissions calculations
Hourly and annual emissions, each number bound to its factor and control.
AP-42 factor lookup
The right factor for a source, with its quality rating.
Annual emissions inventory
The narrative for an AERR or state inventory submittal.
Inventory QA
Per-line QA of an inventory before it goes to the agency.
HAP major-source threshold
Whether you cross 10 / 25 tpy HAP under CAA §112.
GHGRP applicability
Which Part 98 subparts apply, and the 25,000 t CO₂e line.
What AP-42 emission factor applies to NOₓ from a natural-gas boiler?
Stack testing & monitoring
Test protocols, report QC, and monitor reviews.
Stack test protocol
Source, reference methods, run plan and QA per Part 60 Appendix A.
Stack test report QC
Run count, isokinetics, leak checks, drift — what needs resolving.
CEMS RATA review
Whether a CEMS passed its RATA under PS-2 or Part 75 Appendix A.
What does EPA Method 7E require for a NOₓ performance test?
Dispersion modeling
Setting up AERMOD runs and evaluating the results against standards.
Run AERMOD
Stage meteorology, build the input decks, place receptors, and run.
NAAQS / PSD increment
Modeled design values plus background, scored against each standard.
Modeling protocol
An Appendix W protocol for a NAAQS or increment demonstration.
Is a modeled 1-hour NO₂ value of 150 µg/m³ below the NAAQS?
Working with documents
Comparing, editing, converting, and generating documents.
Tabular Review
Compare many documents — each row a doc, each column a question.
Permit redline
Diff two versions; flag editorial, substantive and compliance-critical changes.
Cited deliverables
Word and Excel with citations in footnotes and a Sources sheet.
Tracked-change edits
The assistant proposes edits you accept or reject.
Convert & combine files
Change a file’s type, merge documents, get the format you need.
Plain-English rule summaries
Any NSPS or NESHAP subpart, in readable terms.
Summarize NSPS Subpart Dc in plain English.
Usage tips
- Name the unit and pollutant. “NOₓ from Boiler EU-1,” not “the boiler.”
- Put the documents in the project first. It grounds answers in what it can see.
- Set your Sources to the jurisdictions that govern the facility.
- Match the model to the job — Opus for hard analysis, Haiku for quick checks.
- Click the citations. Confirm the quote and page before you rely on a claim.
- Start from a prebuilt workflow, then adapt it.
Good to know
Draft output
Output is draft work product for review, not legal advice.
Citations required
Definite determinations and calculated numbers require a citation; uncertainty is recorded as an open question.
Security
Internal controls exceed ISO 27001 and SOC 2 standards.
Coverage
Regulatory coverage and workflows are expanded regularly.