The precedent layer behind US data center air permits.
Cinderbench turns tens of thousands of state-issued air permits into a structured, searchable corpus — generator run-hour caps, EPA Tier levels, BACT determinations, NSR netting basis, synthetic-minor conditions, and timeline from application to issuance. Precisely the conditions that decide whether a 1 GW campus ships on schedule or burns a year in agency review.
- Permits parsed
- 10k+
- Seat / yr
- $12k–24k
- Precedent pack
- $1.5k
Six fields. The first four decide whether the project ships on time.
BACT determinations, NSR netting basis, and synthetic-minor caps sit on the permit face — but only the first half of the permitting stack is negotiation. The second half is precedent reading. Our extraction layer pulls every cited condition into the same structured row, the only way to compare today's application against last quarter's issued permits at scale.
Synthetic-minor caps as negotiated — not NSPS defaults.
Tier 4 Final vs Tier 4i, with the test cycle the agency cites.
Negotiated vs presumptive — both with their original APG citation.
Major-source threshold tracking on an annual basis, not lifetime.
The contested middle ground — frequently missed at the PDF level.
Application → issuance, with the agency comments that drove each step.
Six teams. One precedent corpus, one weekly change log.
Trinity, ERM, AECOM and Burns & McDonnell sit on the same internal precedent — and monetize it through billable hours. The wedge is small but defensible until one of the big four decides a $20k-seat product is worth more than the hours it cannibalizes.
- 01Data center developersSite selection, EPC program managers
Know which permitting precedents bind a state before you commit land.
- 02EPC firmsPermit strategy, air-team leads
Pull structured permit history without re-keying PDF fields one at a time.
- 03Generator OEMsCompliance, application engineering
See which EPA Tier and SCR specs actually stuck in issued permits.
- 04Environmental consultantsBACT analysts, NSR specialists
Find negotiated vs presumptive BACT figures across thousands of records.
- 05Project finance / PEDiligence, underwriting
Flag a campus whose air permit cap delays energization against schedule.
- 06Law firmsEnvironmental + regulatory practices
Defensible citations for an APG amendment, Tier 4 challenge, or netting.
Two states. Two effective dates. The precedent that binds your application.
We track fracturing precedents in real time and ship a weekly change log on top — so the APG amendment or Tier-4 move affecting today's filing surfaces before it costs your approval timeline.
- Virginia DEQRevised APG-576
SCR-based presumptive BACT for data-center gen-sets
Effective for applications on or after July 1, 2026. Any VA filing after this date is presumed-SCR unless the applicant affirmatively rebuts.
- Illinois EPATier 4 mandate
Tier 4 requirement for many new diesel emergency generators at data centers
Applies to filings after December 1, 2026. Pull OEM application specs against the issued permits in the prior window — the precedent tells the agency which Tier is on the table.
- Cascadingadditional state rules
Weekly precedent cadence beyond VA + IL
The matrix ships with a weekly change log — every new APG amendment, Tier decision, or netting basis shift, with citation back to the source.
$1,500 to validate. $12k–24k to scale.
The precedent pack validates demand and bridges revenue through build; the seat subscription is the product. Comparable enterprise regulatory intelligence (Enhesa) and PE-grade alt-data feeds price comfortably within the band.
- Every issued VA gen-set permit in window
- Same schema we ship in the seat product
- Citation trace + QA note on flagged fields
- All-state corpus — Title V + synthetic minor with combustion sources
- APG-amendment + Tier-decision change log, weekly
- BACT, NSR, run-hour, Tier, synthetic-minor — structured search
- 50–80 account path to $1M ARR territory
What teams ask before they request access.
If your question is not here, write to cinderbench-2@polsia.app.
The 1 GW filing that slips a quarter costs more than a year of seat subscriptions.
Request seat access, ask about a precedent pack outside Virginia, or send us a sample GEN-SET permit to add to the queue. We respond from cinderbench-2@polsia.app.