Page-cited permit extraction

New Dominion Technology Park LLC

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 73369-3, 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.

Reference	Equipment / model	Count / rating	Fuel / controls	Stated operating field	Source
	engine generator set—	499 unitsNo reliable per-unit rating transcribed	diesel fuel oil—	See operating-scope table—	p. 3 ↗Machine-extracted from explicit permit prose: Commonwealth of Virginia Regulations for the Control and Abatement of Air Pollution, New Dominion Technology Park, LLC 499 Grove Street Herndon, VA 20170 is authorized to construct and operate diesel engine-generator sets located at 399 & 499 Grove Street Herndon, VA 20170 in accordance with the Conditions of this

Operating scope

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

Reference	Limit	Basis	Source
	500 hours/year	r inspection and shall be in operation when the engine- generator sets are operating. (9VAC5-80-1180 D) [09/16/2025] OPERATING LIMITATIONS 4. Operating Hours – The diesel engine-generator sets (Unit Reference #’s NDIIG1 and NDIIG2) shall not operate more than 500 hours per year each. The operating hours shall be calculated monthly as the sum of each consecutive twelve-month period. Compliance for the consecutive twelve-month period shall be demonstrated monthly by adding the total for the mostMachine-extracted normative operating-hours statement; second review pending.	p. 5 ↗
`NDIG1 and NDIG2`	500 hours/year	ding the total for the most recently completed calendar month to the individual monthly totals for the preceding eleven months. (9VAC5-80-1180) [09/26/2007] 5. Operating Hours – Each engine-generator set (Ref. Nos. NDIG1 and NDIG2) shall not operate more than 500 hours per year, calculated monthly as the sum of each consecutive 12 month period. Compliance for the consecutive 12 month period shall be demonstrated monthly by adding the total for the most recently completed calendar month to theMachine-extracted normative operating-hours statement; second review pending.	p. 5 ↗

Permitted emission limits

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

Inspect 16 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`each diesel engine- generator set (Unit Reference #’s NDIIG1 and NDIIG2)`	NOx as NO2—	36.2 lb/hrhourly	——	p. 8 ↗Machine-extracted from a page line in an older official PDF; literal context: generator set (Unit Reference #’s NDIIG1 and NDIIG2) shall not exceed the limits specified below: Nitrogen Oxides (as NO ) 36.2 lbs/hr 2
`each diesel engine- generator set (Unit Reference #’s NDIIG1 and NDIIG2)`	NOx as NO2—	9.0 lb/hrhourly	——	p. 8 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides (as NO ) 36.2 lbs/hr 2 Carbon Monoxide (CO) 9.0 lbs/hr (9VAC5-80-1180) [09/26/2007]
`Cummins Model KTA50-G3 Emergency Gen-Set (Ref No. NDIG1)`	NOx as NO2—	51.4 lb/hrhourly	——	p. 8 ↗Machine-extracted from a page line in an older official PDF; literal context: Emergency Gen-Set (Ref No. NDIG1) shall not exceed the limits specified below: Hourly Annual Nitrogen Oxides 51.4 lbs/hr 12.8 tons/yr Carbon Monoxide (CO) 2.5 lbs/hr 0.6 tons/yr
`Cummins Model KTA50-G3 Emergency Gen-Set (Ref No. NDIG1)`	NOx as NO2—	12.8 lb/hrhourly	——	p. 8 ↗Machine-extracted from a page line in an older official PDF; literal context: Emergency Gen-Set (Ref No. NDIG1) shall not exceed the limits specified below: Hourly Annual Nitrogen Oxides 51.4 lbs/hr 12.8 tons/yr Carbon Monoxide (CO) 2.5 lbs/hr 0.6 tons/yr
`Cummins Model KTA50-G3 Emergency Gen-Set (Ref No. NDIG1)`	NOx as NO2—	2.5 lb/hrhourly	——	p. 8 ↗Machine-extracted from a page line in an older official PDF; literal context: Hourly Annual Nitrogen Oxides 51.4 lbs/hr 12.8 tons/yr Carbon Monoxide (CO) 2.5 lbs/hr 0.6 tons/yr Sulfur Dioxide (SO ) 2.3 lbs/hr 0.6 tons/yr
`Cummins Model KTA50-G3 Emergency Gen-Set (Ref No. NDIG1)`	NOx as NO2—	0.6 lb/hrhourly	——	p. 8 ↗Machine-extracted from a page line in an older official PDF; literal context: Hourly Annual Nitrogen Oxides 51.4 lbs/hr 12.8 tons/yr Carbon Monoxide (CO) 2.5 lbs/hr 0.6 tons/yr Sulfur Dioxide (SO ) 2.3 lbs/hr 0.6 tons/yr
`Cummins Model KTA50-G3 Emergency Gen-Set (Ref No. NDIG1)`	SO2—	2.3 lb/hrhourly	——	p. 8 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides 51.4 lbs/hr 12.8 tons/yr Carbon Monoxide (CO) 2.5 lbs/hr 0.6 tons/yr Sulfur Dioxide (SO ) 2.3 lbs/hr 0.6 tons/yr 2
`Cummins Model KTA50-G3 Emergency Gen-Set (Ref No. NDIG1)`	SO2—	0.6 lb/hrhourly	——	p. 8 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides 51.4 lbs/hr 12.8 tons/yr Carbon Monoxide (CO) 2.5 lbs/hr 0.6 tons/yr Sulfur Dioxide (SO ) 2.3 lbs/hr 0.6 tons/yr 2
`Diesel Caterpillar 3508B (Unit Reference No. NDIG2)`	NOx as NO2—	22.7 lb/hrhourly	——	p. 9 ↗Machine-extracted from a page line in an older official PDF; literal context: Reference No. NDIG2) shall not exceed the limits specified below: Hourly Annual Nitrogen Oxides 22.7 lbs/hr 5.7 tons/yr Carbon Monoxide (CO) 27.9 lbs/hr 7.0 tons/yr
`Diesel Caterpillar 3508B (Unit Reference No. NDIG2)`	NOx as NO2—	5.7 lb/hrhourly	——	p. 9 ↗Machine-extracted from a page line in an older official PDF; literal context: Reference No. NDIG2) shall not exceed the limits specified below: Hourly Annual Nitrogen Oxides 22.7 lbs/hr 5.7 tons/yr Carbon Monoxide (CO) 27.9 lbs/hr 7.0 tons/yr
`Diesel Caterpillar 3508B (Unit Reference No. NDIG2)`	NOx as NO2—	27.9 lb/hrhourly	——	p. 9 ↗Machine-extracted from a page line in an older official PDF; literal context: Hourly Annual Nitrogen Oxides 22.7 lbs/hr 5.7 tons/yr Carbon Monoxide (CO) 27.9 lbs/hr 7.0 tons/yr Volatile Organic Compounds (VOCs) 3.3 lbs/hr 0.8 tons/yr
`Diesel Caterpillar 3508B (Unit Reference No. NDIG2)`	NOx as NO2—	7.0 lb/hrhourly	——	p. 9 ↗Machine-extracted from a page line in an older official PDF; literal context: Hourly Annual Nitrogen Oxides 22.7 lbs/hr 5.7 tons/yr Carbon Monoxide (CO) 27.9 lbs/hr 7.0 tons/yr Volatile Organic Compounds (VOCs) 3.3 lbs/hr 0.8 tons/yr
`Diesel Caterpillar 3508B (Unit Reference No. NDIG2)`	VOC—	3.3 lb/hrhourly	——	p. 9 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides 22.7 lbs/hr 5.7 tons/yr Carbon Monoxide (CO) 27.9 lbs/hr 7.0 tons/yr Volatile Organic Compounds (VOCs) 3.3 lbs/hr 0.8 tons/yr These emissions are derived from the estimated overall emission contribution from
`Diesel Caterpillar 3508B (Unit Reference No. NDIG2)`	VOC—	0.8 lb/hrhourly	——	p. 9 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides 22.7 lbs/hr 5.7 tons/yr Carbon Monoxide (CO) 27.9 lbs/hr 7.0 tons/yr Volatile Organic Compounds (VOCs) 3.3 lbs/hr 0.8 tons/yr These emissions are derived from the estimated overall emission contribution from
`Diesel Caterpillar 3508B (Unit Reference No. NDIG2)`	visible emissions—	5 percent opacityvisible	——	p. 9 ↗Machine-extracted from a page line in an older official PDF; literal context: (9VAC5-80-1180, 9VAC5-50-260 and 9VAC5-50-80) [09/27/2007] 17. Visible Emission Limit - Visible emissions from each engine-generator set exhaust (Ref. Nos. NDIG1 and NDIG2) shall not exceed 5% opacity except during one 6-minute period in any one hour in which visible emissions shall not exceed 10% opacity as determined by
`Diesel Caterpillar 3508B (Unit Reference No. NDIG2)`	visible emissions—	10 percent opacityvisible	——	p. 9 ↗Machine-extracted from a page line in an older official PDF; literal context: 17. Visible Emission Limit - Visible emissions from each engine-generator set exhaust (Ref. Nos. NDIG1 and NDIG2) shall not exceed 5% opacity except during one 6-minute period in any one hour in which visible emissions shall not exceed 10% opacity as determined by EPA Method 9 (reference 40 CFR 60, Appendix A). This condition applies at all times

DOCUMENT HISTORY

What this document says it changes

amended or superseding permit document

Explicitly supersedes the document dated 2007-09-26.

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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