Page-cited permit extraction

The Aerospace Corporation

Fairfax Co., Virginia

QA status Machine-extractedRelease dated July 29, 2026

EVIDENCE NOTE

What the public record says

A machine-extracted candidate of equipment groups and permit limits stated in Virginia DEQ permit 73977-1, with one-based PDF page citations. Permitted terms do not establish actual operation or emissions.

Primary sourceVirginia DEQ permit document

Virginia Department of Environmental Quality

Open original source ↗

Summary fields cite p. 1, p. 3.

What this record does not establish

The source confirms the document and its stated fields. This profile does not infer actual emissions, compliance history, operating status, facility capacity or environmental impact where those facts are not established by the cited document.

How to read the status

Issued means the agency granted the permit subject to its conditions. It does not mean every permitted unit is operating, that maximum permitted emissions occur, or that later amendments do not exist.

MACHINE-EXTRACTED CANDIDATE

Equipment and limits,
kept separate from actual use.

These page-cited rows are machine-extracted and still require a second manual review. Verify every reused value against the linked official PDF. Page numbers refer to the one-based position in the linked PDF. Blank values are not zero.

Permitted equipment

1 document-defined equipment groups. Counts and per-unit ratings are transcribed; combined capacity is not calculated.

ReferenceEquipment / modelCount / ratingFuel / controlsStated operating fieldSource
emergency engine generator setCaterpillar · Diesel 11 units1000 or 3000 kW eachdiesel fuel oilselective catalytic reduction (SCR)See operating-scope tablep. 4Machine-extracted from explicit permit prose: Capacity Technology Requirements One Caterpillar Diesel 1,000 kW None NSPS Mil G1 Driven Emergency Engine 1,474 BHP Generator Set Model C32 G-2 Three Caterpillar Diesel 3,000 kW None NSPS mi Through Driven Emergency Engine 4,423 BHP G-4 Generator Sets Model C175-16 with SCR Specifications included in the permit under this Condition are for info

Operating scope

Authorized hours, time windows or an explicit finding that no numeric annual-hour cap was located in the reviewed sections.

ReferenceLimitBasisSource
G-1500 hours/yearssions from operations under scenarios 5.a. through 5.c above, shall not exceed the limits stated in Condition 12. (9 VAC 5-80-1180 D and 9 VAC 5-50-260) 6. Operating Hours - The operating hours for the engine-generator set (Unit Ref. No.G-1) shall not exceed 500 hours per year, calculated monthly as the sum of each consecutive twelve month period. (9 VAC 5-80-1180) 7. Operating Hours - The combined operating hours for the engine-generator sets (Unit Ref. No's.G-2 through G-4) shall not exceedMachine-extracted normative operating-hours statement; second review pending.p. 6
500 hours/year) shall not exceed 500 hours per year, calculated monthly as the sum of each consecutive twelve month period. (9 VAC 5-80-1180) 7. Operating Hours - The combined operating hours for the engine-generator sets (Unit Ref. No's.G-2 through G-4) shall not exceed 1,500 hours per year, calculated monthly as the sum of each consecutive twelve month period. (9 VAC 5-80-1180) 8. Operation of the engine-generator set - The permittee must operate and maintain each engine-generator set and control device aMachine-extracted normative operating-hours statement; second review pending.p. 6

Permitted emission limits

4 pollutant, unit-group and limit rows. These are permit terms, not measured or actual emissions.

Inspect 4 transcribed limit rows
ReferencePollutantLimitBasis / scopeSource
NOx as NO211.7 tpyannualp. 8Machine-extracted from a page line in an older official PDF; literal context: 12. Annual Engine-Generator Emission Limits - Facility-wide emissions from the engine-generator sets (Unit Ref. No.'s G-1 through G-4) shall not exceed the limits specified below: Nitrogen Oxides (as N0 ) 11.7 tons/yr 2
NOx as NO210.4 tpyannualp. 8Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides (as N0 ) 11.7 tons/yr 2 Carbon Monoxide (CO) 10.4 tons/yr Volatile Organic Compounds (VOC) 2.0 tons/yr
VOC2.0 tpyannualp. 8Machine-extracted from a page line in an older official PDF; literal context: 2 Carbon Monoxide (CO) 10.4 tons/yr Volatile Organic Compounds (VOC) 2.0 tons/yr These emissions are derived from the estimated overall emission contribution from operating limits.
NOx as NO29.14 lb/hrhourlyp. 8Machine-extracted from a page line in an older official PDF; literal context: Engine-generator emission factors: G-1 G-2 to G-4 NOx(asN0 ) 19.24 Ibs/hr 9.14 lbs/hr 2

DOCUMENT HISTORY

What this document says it changes

permit to construct and operate

No superseded-document date is asserted beyond the cited source wording.

p. 1, p. 3

QA NOTES

Ambiguity stays visible

  • Machine-extracted candidate. Verify every reused value against the cited official PDF page.
  • Prose fallback; verify equipment grouping.
  • Confirm whether the limit is per unit, combined, or limited to testing/maintenance.
  • Older-PDF text fallback; verify row and unit alignment.
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