Page-cited permit extraction

STACK Infrastructure Data Center - SI NVA06A LLC

Loudoun 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 74269-2, 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. 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

3 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
`EG-44`	emergency engine generator setKohler · KD1250	1 units1250 or 938 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`EG-01 through EG-42`	emergency engine generator setKohler · KD3000 and/or CAT C175-16	42 units3000 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`EG-43`	emergency engine generator setKohler · KD1600	1 units1600 or 1200 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.

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
`EG-01 through EG-44`	500 hours/year	tion of each unit (which involves fuel combustion) shall be minimized to the maximum extent practical. (9VAC5-80-1180) [2/11/2026] 9. Operating Hours – Each individual emergency diesel engine gen-set (Ref. Nos. EG-01 through EG-44) shall not operate more than 500 hours per year for all purposes (as provided in Condition 5) combined. The emergency diesel engine gen-sets (Ref. Nos. EG-01 through EG-44) shall not operate more than 3,390 hours per year combined for all purposes (as provided in ConMachine-extracted normative operating-hours statement; second review pending.	p. 8 ↗
`EG-01 through EG-44`	390 hours/year	ncy diesel engine gen-set (Ref. Nos. EG-01 through EG-44) shall not operate more than 500 hours per year for all purposes (as provided in Condition 5) combined. The emergency diesel engine gen-sets (Ref. Nos. EG-01 through EG-44) shall not operate more than 3,390 hours per year combined for all purposes (as provided in Condition 5). Each individual emergency diesel engine gen-set (Ref. Nos. EG-01 through EG-44) shall not operate more than 18 hours per year for scheduled maintenance checks andMachine-extracted normative operating-hours statement; second review pending.	p. 8 ↗
`EG-01 through EG-44`	18 hours/year	ngine gen-sets (Ref. Nos. EG-01 through EG-44) shall not operate more than 3,390 hours per year combined for all purposes (as provided in Condition 5). Each individual emergency diesel engine gen-set (Ref. Nos. EG-01 through EG-44) shall not operate more than 18 hours per year for scheduled maintenance checks and readiness testing (Scheduled MCRT, as provided in Condition 5.c).Machine-extracted normative operating-hours statement; second review pending.	p. 8 ↗

Permitted emission limits

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

Inspect 28 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`(Ref. Nos. EG-01 through EG- 42) Kohler KD3000`	NOx as NO2—	56.97 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`CAT C175-16`	NOx as NO2—	58.51 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. No. EG- 43) Kohler KD1600`	NOx as NO2—	20.02 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. No. EG- 44) Kohler KD1250`	NOx as NO2—	15.87 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. Nos. EG-01 through EG- 42) Kohler KD3000`	NOx as NO2—	13.72 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`CAT C175-16`	NOx as NO2—	6.05 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. No. EG- 43) Kohler KD1600`	NOx as NO2—	5.23 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. No. EG- 44) Kohler KD1250`	NOx as NO2—	5.98 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. Nos. EG-01 through EG- 42) Kohler KD3000`	VOC—	2.85 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`CAT C175-16`	VOC—	2.87 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. No. EG- 43) Kohler KD1600`	VOC—	0.14 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. No. EG- 44) Kohler KD1250`	VOC—	0.09 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. Nos. EG-01 through EG- 42) Kohler KD3000`	PM10—	1.00 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`CAT C175-16`	PM10—	1.50 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. No. EG- 43) Kohler KD1600`	PM10—	0.56 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. No. EG- 44) Kohler KD1250`	PM10—	0.45 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. Nos. EG-01 through EG- 42) Kohler KD3000`	PM2.5—	1.00 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`CAT C175-16`	PM2.5—	1.50 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. No. EG- 43) Kohler KD1600`	PM2.5—	0.56 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. No. EG- 44) Kohler KD1250`	PM2.5—	0.45 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. Nos. EG-01 through EG-44)`	NOx as NO2—	99.17 tpyannual	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. Nos. EG-01 through EG-44)`	NOx as NO2—	23.25 tpyannual	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. Nos. EG-01 through EG-44)`	VOC—	4.86 tpyannual	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. Nos. EG-01 through EG-44)`	PM10—	2.54 tpyannual	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`(Ref. Nos. EG-01 through EG-44)`	PM2.5—	2.54 tpyannual	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
	visible emissions—	5 percent opacityvisible	——	p. 12 ↗Machine-extracted from a page line in an older official PDF; literal context: Page 10 14. Visible Emission Limit – Visible emissions from each emergency diesel engine gen-set (Ref. Nos. EG-01 through EG-44) exhaust shall not exceed 5% opacity except during one (1) six-minute period in any one-hour in which visible emissions shall not exceed 10%
	visible emissions—	10 percent opacityvisible	——	p. 12 ↗Machine-extracted from a page line in an older official PDF; literal context: 14. Visible Emission Limit – Visible emissions from each emergency diesel engine gen-set (Ref. Nos. EG-01 through EG-44) exhaust shall not exceed 5% opacity except during one (1) six-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
	visible emissions—	20 percent opacityvisible	——	p. 12 ↗Machine-extracted from a page line in an older official PDF; literal context: During startup and shutdown, visible emissions from each emergency diesel engine gen-set shall not exceed 10% opacity except during one (1) six-minute period in any one-hour in which visible emissions shall not exceed 20% opacity as determined by EPA Method 9 (reference 40 CFR 60, Appendix A).

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. 3 ↗

QA NOTES

Ambiguity stays visible

Machine-extracted candidate. Verify every reused value against the cited official PDF page.
Verify table column grouping and any alternative models.
Confirm whether the limit is per unit, combined, or limited to testing/maintenance.
Confirm multi-row and merged-column header association.
Older-PDF text fallback; verify row and unit alignment.

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