Page-cited permit extraction

Amazon Data Services Inc IAD-156 IAD-157 IAD-158 IAD-159 IAD-327

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 74250-2, 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. 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

7 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
`31 through 134`	emergency engine generator setCaterpillar · 3516E non-	104 units2750 kW each	diesel fuel oilselective catalytic reduction (SCR); diesel particulate filter	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`135 through 138`	emergency engine generator setCaterpillar · C18	4 units750 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 through 26`	emergency engine generator setCaterpillar · 3516C-HD	26 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.
`27`	emergency engine generator setCaterpillar · C18	1 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.
`28 through 30`	emergency engine generator setCaterpillar · 3512C	3 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 transitory	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.
	engine generator set—	— unitsNo reliable per-unit rating transcribed	——	See operating-scope table—	p. 11 ↗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 30, T1, and T2`	32 hours/year	ach unit (which involves fuel combustion) shall be minimized to the maximum extent practical. (9VAC5-80-1180) [6/24/2025] 10. Operating Hours – a. Each individual emergency diesel engine gen-set (Ref. Nos. 1 through 30, T1, and T2) shall not operate more than 32 hours per year for Scheduled MCRT, as provided in Condition 6.c. b. Each individual emergency diesel engine gen-set (Ref. Nos. 135 through 138) shall not operate more than 35 hours per year for Scheduled MCRT, as provided in ConditionMachine-extracted normative operating-hours statement; second review pending.	p. 9 ↗
`1 through 30, T1, and T2`	35 hours/year	esel engine gen-set (Ref. Nos. 1 through 30, T1, and T2) shall not operate more than 32 hours per year for Scheduled MCRT, as provided in Condition 6.c. b. Each individual emergency diesel engine gen-set (Ref. Nos. 135 through 138) shall not operate more than 35 hours per year for Scheduled MCRT, as provided in Condition 6.c.Machine-extracted normative operating-hours statement; second review pending.	p. 9 ↗
`1 through 30, 135 through 138, T1, and T2`	500 hours/year	Amazon Data Services, Inc. Registration Number: 74250 June 24, 2025 Page 8 c. Each individual emergency diesel engine gen-set (Ref. Nos. 1 through 30, 135 through 138, 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. 10 ↗

Permitted emission limits

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

Inspect 50 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`Caterpillar 3516E (Ref. Nos. 31 through 134) Uncontrolled`	NOx as NO2uncontrolled	53.48 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Controlled by SCR`	NOx as NO2controlled	4.44 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. 31 through 134) Uncontrolled`	NOx as NO2uncontrolled	3.10 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. 31 through 134) Uncontrolled`	VOCuncontrolled	0.53 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. 31 through 134) Uncontrolled`	SO2uncontrolled	0.04 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. 31 through 134) Uncontrolled`	PMuncontrolled	0.20 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. 31 through 134) Uncontrolled`	PM10uncontrolled	0.20 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. 31 through 134) Uncontrolled`	PM2.5uncontrolled	0.20 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 - 26)`	NOx as NO2—	48.06 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 600 ekW (Ref. No. 27)`	NOx as NO2—	9.58 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. Nos. 28 - 30)`	NOx as NO2—	30.75 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 - 26)`	NOx as NO2—	6.09 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 600 ekW (Ref. No. 27)`	NOx as NO2—	1.59 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. Nos. 28 - 30)`	NOx as NO2—	5.78 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 - 26)`	VOC—	1.21 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 600 ekW (Ref. No. 27)`	VOC—	0.32 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. Nos. 28 - 30)`	VOC—	0.87 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 - 26)`	SO2—	0.04 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 600 ekW (Ref. No. 27)`	SO2—	0.01 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. Nos. 28 - 30)`	SO2—	0.02 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 - 26)`	PM—	0.40 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 600 ekW (Ref. No. 27)`	PM—	0.11 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. Nos. 28 - 30)`	PM—	0.44 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 - 26)`	PM10—	0.40 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 600 ekW (Ref. No. 27)`	PM10—	0.11 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. Nos. 28 - 30)`	PM10—	0.44 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C-HD (Ref. Nos. 1 - 26)`	PM2.5—	0.40 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 600 ekW (Ref. No. 27)`	PM2.5—	0.11 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3512C (Ref. Nos. 28 - 30)`	PM2.5—	0.44 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 750 ekW (Ref. Nos. 135 - 138)`	NOx as NO2—	14.34 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 & T2)`	NOx as NO2—	38.85 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 750 ekW (Ref. Nos. 135 - 138)`	NOx as NO2—	4.73 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 & T2)`	NOx as NO2—	3.95 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 750 ekW (Ref. Nos. 135 - 138)`	VOC—	1.91 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 & T2)`	VOC—	1.14 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 750 ekW (Ref. Nos. 135 - 138)`	SO2—	0.01 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 & T2)`	SO2—	0.03 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 750 ekW (Ref. Nos. 135 - 138)`	PM—	0.32 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 & T2)`	PM—	0.57 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 750 ekW (Ref. Nos. 135 - 138)`	PM10—	0.32 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 & T2)`	PM10—	0.57 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 – 750 ekW (Ref. Nos. 135 - 138)`	PM2.5—	0.32 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. T1 & T2)`	PM2.5—	0.57 lb/hrhourly	——	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1 – 138, T1, & T2)`	NOx as NO2—	96.03 tpyannual	combined—	p. 14 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1 – 138, T1, & T2)`	NOx as NO2—	83.79 tpyannual	combined—	p. 14 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1 – 138, T1, & T2)`	VOC—	21.25 tpyannual	combined—	p. 14 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1 – 138, T1, & T2)`	SO2—	0.88 tpyannual	combined—	p. 14 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1 – 138, T1, & T2)`	PM—	5.70 tpyannual	combined—	p. 14 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1 – 138, T1, & T2)`	PM10—	5.70 tpyannual	combined—	p. 14 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1 – 138, T1, & T2)`	PM2.5—	5.70 tpyannual	combined—	p. 14 ↗Machine-extracted from an official permit limit table; header grouping requires second review.

DOCUMENT HISTORY

What this document says it changes

amended or superseding permit document

Explicitly supersedes the document dated 2023-03-30.

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.

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