Page-cited permit extraction

Amazon Data Services, Inc. IAD-144 IAD-145

Loudoun Co., Virginia

QA status Machine-extractedRelease dated July 29, 2026

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EVIDENCE NOTE

What the public record says

A machine-extracted candidate of equipment groups and permit limits stated in Virginia DEQ permit 74153-3, 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

5 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
`12 – 14, 17 – 19, 23, and 40`	emergency engine generator setCaterpillar · 3516C-HD	8 units2500 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`1 – 11, 15, 16, 20 – 22, and 24 – 39`	emergency engine generator setCaterpillar · 3516C-HD	32 units2500 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`T1`	emergency engine generator setCaterpillar · 3516C	1 units2000 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`41 – 56`	emergency engine generator setCaterpillar · 3516C-HD	16 units2500 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`T2 – T3`	emergency engine generator setCaterpillar · 3516C	2 units2000 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
`1 through 11, 15, 16, 20 through 22, 24 through 39, and T1`	100 hours/year	ed unit is fully integrated with the sources electrical system. (9VAC5-80-1180) [6/21/2024] 7. Operating Hours – Each individual emergency diesel engine gen-set (Ref. Nos. 1 through 11, 15, 16, 20 through 22, 24 through 39, and T1) shall not operate more than 100 hours per year for maintenance checks and readiness testing (as provided in Conditions 6.c and 6.d) and no more than 500 hours per year for all purposes (as provided in Condition 6) combined. The annual limits for hours of operation sMachine-extracted normative operating-hours statement; second review pending.	p. 8 ↗
`1 through 11, 15, 16, 20 through 22, 24 through 39, and T1`	500 hours/year	ividual emergency diesel engine gen-set (Ref. Nos. 1 through 11, 15, 16, 20 through 22, 24 through 39, and T1) shall not operate more than 100 hours per year for maintenance checks and readiness testing (as provided in Conditions 6.c and 6.d) and no more than 500 hours per year for all purposes (as provided in Condition 6) combined. The annual limits for hours of operation shall be calculated monthly as the sum of each consecutive 12-month period. Compliance for the consecutive 12-month periodMachine-extracted normative operating-hours statement; second review pending.	p. 8 ↗
`12, 13, 14, 17, 18, 19, 23, 40 through 56, T2, and T3`	500 hours/year	ompleted calendar month to the individual monthly totals for the preceding 11 months. (9VAC5-80-1180) [6/21/2024] 8. Operating Hours – Each individual engine gen-set (Ref. Nos. 12, 13, 14, 17, 18, 19, 23, 40 through 56, T2, and T3) shall not operate more than 500 hours per year for all purposes (as provided in Condition 6).Machine-extracted normative operating-hours statement; second review pending.	p. 8 ↗

Permitted emission limits

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

Inspect 29 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`Ref. No. T1`	NOx as NO2—	38.85 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. T1`	NOx as NO2—	4.04 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. T1`	NOx as NO2—	3.95 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. T1`	VOC—	1.13 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. T1`	PM10—	0.57 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. T1`	PM2.5—	0.57 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 1 - 11, 15, 16, 20 - 22, and 24 – 39 (per unit)`	NOx as NO2—	48.07 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 12 - 14, 17 - 19, 23, and 40 (per unit)`	NOx as NO2—	48.06 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 41 - 56 (per unit)`	NOx as NO2—	48.06 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 1 - 11, 15, 16, 20 - 22, and 24 – 39 (per unit)`	NOx as NO2—	6.01 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 12 - 14, 17 - 19, 23, and 40 (per unit)`	NOx as NO2—	6.09 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 41 - 56 (per unit)`	NOx as NO2—	6.01 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 1 - 11, 15, 16, 20 - 22, and 24 – 39 (per unit)`	VOC—	1.20 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 12 - 14, 17 - 19, 23, and 40 (per unit)`	VOC—	1.20 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 41 - 56 (per unit)`	VOC—	1.20 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 1 - 11, 15, 16, 20 - 22, and 24 – 39 (per unit)`	PM10—	0.41 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 12 - 14, 17 - 19, 23, and 40 (per unit)`	PM10—	0.41 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 41 - 56 (per unit)`	PM10—	0.41 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 1 - 11, 15, 16, 20 - 22, and 24 – 39 (per unit)`	PM2.5—	0.41 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 12 - 14, 17 - 19, 23, and 40 (per unit)`	PM2.5—	0.41 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. 41 - 56 (per unit)`	PM2.5—	0.41 lb/hrhourly	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Operations (59 Units Combined)`	NOx as NO2—	96.03 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Operations (59 Units Combined)`	NOx as NO2—	51.63 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Operations (59 Units Combined)`	VOC—	11.36 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Operations (59 Units Combined)`	PM10—	4.21 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Operations (59 Units Combined)`	PM2.5—	4.21 tpyannual	combined—	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 16. Visible Emission Limit – Visible emissions from each emergency diesel engine gen-set (Ref. Nos. 1 through 56 and T1 through T3) shall not exceed five percent (5%) opacity except during one six-minute period in any one hour in which visible emissions shall not exceed ten
	visible emissions—	10 percent opacityvisible	——	p. 12 ↗Machine-extracted from a page line in an older official PDF; literal context: Nos. 1 through 56 and T1 through T3) shall not exceed five percent (5%) opacity except during one six-minute period in any one hour in which visible emissions shall not exceed ten percent (10%) opacity as determined by the EPA Method 9 (40 CFR 60, Appendix A). During startup and shutdown, visible emissions from each engine gen-set (Ref. Nos. 1 through
	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 engine gen-set (Ref. Nos. 1 through 56 and T1 through T3) shall not exceed ten percent (10%) opacity except during one 6-minute period in any one hour in which visible emissions shall not exceed twenty percent (20%) opacity as determined by EPA Method 9 (40 CFR 60, Appendix A).

DOCUMENT HISTORY

What this document says it changes

amended or superseding permit document

Explicitly supersedes the document dated 2021-02-09.

p. 1 ↗, 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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