Page-cited permit extraction

Amazon Data Services Inc - IAD-165/166/167/168/613

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 74273-1, 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

4 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
`1 through 100`	emergency engine generator setCaterpillar · 3516C-HD	100 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.
`101 through 105`	emergency engine generator setCaterpillar · C18	5 units600 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`106`	emergency engine generator setCaterpillar · 3512C	1 units1600 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 and T2`	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 106`	32 hours/year	cted unit is started on-site and ending when the affected unit is fully integrated with the sources electrical system. (9 VAC 5-80-1180) 7. Operating Hours – Each individual emergency diesel engine gen-set (Ref. Nos. 1 through 106) shall not operate more than 32 hours per year for scheduled maintenance checks and readiness testing (Scheduled MCRT) (as provided in Condition 6c.). Each individual emergency diesel engine gen-set (Ref. Nos. 1 through 106, T1 and T2) shall not operate more than 50Machine-extracted normative operating-hours statement; second review pending.	p. 8 ↗
`1 through 106, T1 and T2`	500 hours/year	ll not operate more than 32 hours per year for scheduled maintenance checks and readiness testing (Scheduled MCRT) (as provided in Condition 6c.). Each individual emergency diesel engine gen-set (Ref. Nos. 1 through 106, T1 and T2) shall not operate 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 ↗

Permitted emission limits

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

Inspect 33 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`Caterpillar 3516C-HD (Ref. Nos. 1 through 100)`	NOx as NO2—	48.06 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 through 100)`	NOx as NO2—	9.58 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. No. 106)`	NOx as NO2—	30.75 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 and T2)`	NOx as NO2—	38.85 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 through 100)`	NOx as NO2—	6.09 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 through 100)`	NOx as NO2—	1.59 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. No. 106)`	NOx as NO2—	5.78 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 and T2)`	NOx as NO2—	3.95 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 through 100)`	VOC—	1.21 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 through 100)`	VOC—	0.33 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. No. 106)`	VOC—	0.87 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 and T2)`	VOC—	1.13 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 through 100)`	PM10—	0.40 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 through 100)`	PM10—	0.11 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. No. 106)`	PM10—	0.44 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 and T2)`	PM10—	0.57 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 through 100)`	PM2.5—	0.40 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 through 100)`	PM2.5—	0.11 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. No. 106)`	PM2.5—	0.44 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 and T2)`	PM2.5—	0.57 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD, Caterpillar C18, and Caterpillar 3512C (Ref. Nos. 1 through 106) All Operations (106 Units Combined)`	NOx as NO2—	93.15 tpyannual	combined—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD, Caterpillar C18, and Caterpillar 3512C (Ref. Nos. 1 through 106) All Operations (106 Units Combined)`	NOx as NO2—	50.63 tpyannual	combined—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD, Caterpillar C18, and Caterpillar 3512C (Ref. Nos. 1 through 106) All Operations (106 Units Combined)`	VOC—	10.68 tpyannual	combined—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD, Caterpillar C18, and Caterpillar 3512C (Ref. Nos. 1 through 106) All Operations (106 Units Combined)`	PM10—	3.42 tpyannual	combined—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD, Caterpillar C18, and Caterpillar 3512C (Ref. Nos. 1 through 106) All Operations (106 Units Combined)`	PM2.5—	3.42 tpyannual	combined—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 and T2) All Operations (2 Units Combined)`	NOx as NO2—	2.88 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 and T2) All Operations (2 Units Combined)`	NOx as NO2—	1.53 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD, Caterpillar C18, Caterpillar 3512C and Caterpillar 3516C (Ref. Nos. 1 through 106, T1 and T2) All Operations (108 Units Combined)`	NOx as NO2—	96.03 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD, Caterpillar C18, Caterpillar 3512C and Caterpillar 3516C (Ref. Nos. 1 through 106, T1 and T2) All Operations (108 Units Combined)`	NOx as NO2—	52.16 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD, Caterpillar C18, Caterpillar 3512C and Caterpillar 3516C (Ref. Nos. 1 through 106, T1 and T2) All Operations (108 Units Combined)`	VOC—	11.06 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD, Caterpillar C18, Caterpillar 3512C and Caterpillar 3516C (Ref. Nos. 1 through 106, T1 and T2) All Operations (108 Units Combined)`	PM10—	3.59 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD, Caterpillar C18, Caterpillar 3512C and Caterpillar 3516C (Ref. Nos. 1 through 106, T1 and T2) All Operations (108 Units Combined)`	PM2.5—	3.59 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
	visible emissions—	20 percent opacityvisible	——	p. 12 ↗Machine-extracted from a page line in an older official PDF; literal context: December 19, 2023 Page 10 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. 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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