Page-cited permit extraction

Microsoft Corp - Leesburg Data Center (IAD01-02-03-04-05)

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 74220-4, 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

11 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
`FWP-01`	fire-pump engineJohn Deere · 6068 Series Power Tech	— units175 bhp each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`FWP-02`	fire-pump engineJohn Deere · 4045 Series Power Tech	— units64 bhp each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`FWP-03`	fire-pump engineJohn Deere · 4045 Series Power Tech	— units99 bhp each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`EG-001 through EG- 020`	emergency engine generator setCaterpillar · C175-16	20 units3100 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-101`	emergency engine generator setCaterpillar · C27	— 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.
`EG-201`	emergency engine generator setCaterpillar · C27	— 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.
`EG-021 through EG- 060`	emergency engine generator setCaterpillar · C175-16	40 units3100 kW each	diesel fuel oil—	See operating-scope table—	p. 6 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`EG-061 through EG- 080`	emergency engine generator setCaterpillar · C175-16	20 units3100 kW each	diesel fuel oil—	See operating-scope table—	p. 6 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`EG-401`	emergency engine generator setCaterpillar · C32	— units1000 kW each	diesel fuel oil—	See operating-scope table—	p. 6 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`EG-501`	emergency engine generator setCaterpillar · C32	— units1000 kW each	diesel fuel oil—	See operating-scope table—	p. 6 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`EG-081 through EG- 100`	emergency engine generator setCaterpillar · C175-16	20 units3100 kW each	diesel fuel oil—	See operating-scope table—	p. 6 ↗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-001 through EG-101, EG-201, EG-401, and EG-501`	30 hours/year	he affected unit is fully integrated with the sources electrical system. (9VAC5-80-1180) [8/16/2024] 7. Operating Hours – Each individual emergency diesel engine gen-set (Ref. Nos. EG-001 through EG-101, EG-201, EG-401, and EG-501) shall not operate more than 30 hours per year for scheduled maintenance checks and readiness testing (Scheduled MCRT, as provided in Condition 6.c). Each individual emergency diesel engine gen-set (Ref. Nos. EG-001 through EG-101, EG- 201, EG-401, and EG-501) shallMachine-extracted normative operating-hours statement; second review pending.	p. 9 ↗
`EG-001 through EG-101, EG- 201, EG-401, and EG-501`	500 hours/year	30 hours per year for scheduled maintenance checks and readiness testing (Scheduled MCRT, as provided in Condition 6.c). Each individual emergency diesel engine gen-set (Ref. Nos. EG-001 through EG-101, EG- 201, EG-401, and EG-501) 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. 9 ↗
`FWP-01 through FWP-03`	500 hours/year	thly by adding the total for the most recently completed calendar month to the individual monthly totals for the preceding 11 months. (9VAC5-80-1180) [8/16/2024] 8. Operating Hours – Each fire pump (Ref. Nos. FWP-01 through FWP-03) 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 daily as the sum of each consecutive 365-day period. Compliance for the consecutive 365-day period shaMachine-extracted normative operating-hours statement; second review pending.	p. 9 ↗

Permitted emission limits

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

Inspect 35 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`Caterpillar C27 (Ref. Nos. EG-101 & EG-201)`	NOx as NO2—	14.74 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C175-16 (Ref. Nos. EG-001 through EG-100)`	NOx as NO2—	57.89 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C32 (Ref. Nos. EG-401 & EG-501)`	NOx as NO2—	19.52 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C27 (Ref. Nos. EG-101 & EG-201)`	NOx as NO2—	1.54 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C175-16 (Ref. Nos. EG-001 through EG-100)`	NOx as NO2—	7.46 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C32 (Ref. Nos. EG-401 & EG-501)`	NOx as NO2—	2.78 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C27 (Ref. Nos. EG-101 & EG-201)`	VOC—	0.24 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C175-16 (Ref. Nos. EG-001 through EG-100)`	VOC—	0.85 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C32 (Ref. Nos. EG-401 & EG-501)`	VOC—	0.34 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C27 (Ref. Nos. EG-101 & EG-201)`	PM10—	0.39 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C175-16 (Ref. Nos. EG-001 through EG-100)`	PM10—	0.61 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C32 (Ref. Nos. EG-401 & EG-501)`	PM10—	0.26 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C27 (Ref. Nos. EG-101 & EG-201)`	PM2.5—	0.39 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C175-16 (Ref. Nos. EG-001 through EG-100)`	PM2.5—	0.61 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C32 (Ref. Nos. EG-401 & EG-501)`	PM2.5—	0.26 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 6068 (Ref. No. FWP-01)`	NOx as NO2—	1.37 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 4045 (Ref. No. FWP-02)`	NOx as NO2—	0.49 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 4045 (Ref. No. FWP-03)`	NOx as NO2—	0.80 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 6068 (Ref. No. FWP-01)`	NOx as NO2—	0.62 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 4045 (Ref. No. FWP-02)`	NOx as NO2—	0.11 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 4045 (Ref. No. FWP-03)`	NOx as NO2—	0.18 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 6068 (Ref. No. FWP-01)`	VOC—	0.13 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 4045 (Ref. No. FWP-02)`	VOC—	0.04 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 4045 (Ref. No. FWP-03)`	VOC—	0.02 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 6068 (Ref. No. FWP-01)`	PM10—	0.05 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 4045 (Ref. No. FWP-02)`	PM10—	0.02 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 4045 (Ref. No. FWP-03)`	PM10—	0.04 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 6068 (Ref. No. FWP-01)`	PM2.5—	0.05 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 4045 (Ref. No. FWP-02)`	PM2.5—	0.02 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`John Deere 4045 (Ref. No. FWP-03)`	PM2.5—	0.04 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Emission Units (Ref. Nos. EG-001 through EG-101, EG-201, EG-401, EG-501, and FWP-01 through FWP-03)`	NOx as NO2—	94.67 tpyannual	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Emission Units (Ref. Nos. EG-001 through EG-101, EG-201, EG-401, EG-501, and FWP-01 through FWP-03)`	NOx as NO2—	40.62 tpyannual	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Emission Units (Ref. Nos. EG-001 through EG-101, EG-201, EG-401, EG-501, and FWP-01 through FWP-03)`	VOC—	6.86 tpyannual	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Emission Units (Ref. Nos. EG-001 through EG-101, EG-201, EG-401, EG-501, and FWP-01 through FWP-03)`	PM10—	3.34 tpyannual	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Emission Units (Ref. Nos. EG-001 through EG-101, EG-201, EG-401, EG-501, and FWP-01 through FWP-03)`	PM2.5—	3.34 tpyannual	——	p. 12 ↗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 2024-08-16.

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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