Amazon Data Services, Inc. IAD-150 IAD-151 IAD-152
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 74174-1, with one-based PDF page citations. Permitted terms do not establish actual operation or emissions.
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
2 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
emergency engine generator setCaterpillar
2 units2500 kW each
diesel fuel oil—
See operating-scope table—
p. 5 ↗Machine-extracted from explicit permit prose: Equipment Description Rated Federal Permit Capacity Requirements Date Sixty Two (62) Caterpillar 3,634 bhp 1-62 3516C-HD emergency 2,500 ekW None 8/9/2019 diesel engine gen-sets (each unit) Transitory equipment to be constructed: Standby Delegated Original Reference No
p. 5 ↗Machine-extracted from explicit permit prose: Equipment Description Rated Federal Permit Capacity Requirements Date Two (2) Caterpillar 3516C 2,937 bhp T-1 and T-2 emergency diesel engine 2,000 ekW None 8/9/2019 gen-set (each unit) Specifications included in the above tables are for informational purposes only and do
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
100 hours/year
ual period calculated as the sum of all emissions firom operation under the scenarios above, shall not exceed the limits stated in Condition 14. (9 VAC 5-80-1180) 8. Operating Hours - Each individual emergency diesel engine gen-set shall not operate more than 100 hours per year for planned non-emergency operation and no more than 500 hours per year for all purposes (as provided in Condition 7). Planned non-emergency operation includes scheduled and non-scheduled maintenance, readiness testing,Machine-extracted normative operating-hours statement; second review pending.
the scenarios above, shall not exceed the limits stated in Condition 14. (9 VAC 5-80-1180) 8. Operating Hours - Each individual emergency diesel engine gen-set shall not operate more than 100 hours per year for planned non-emergency operation and no more than 500 hours per year for all purposes (as provided in Condition 7). Planned non-emergency operation includes scheduled and non-scheduled maintenance, readiness testing, and operational training. Planned non-emergency operation cannot be useMachine-extracted normative operating-hours statement; second review pending.
13 pollutant, unit-group and limit rows. These are permit terms, not measured or actual emissions.
Inspect 13 transcribed limit rows
Reference
Pollutant
Limit
Basis / scope
Source
each Caterpillar 3516C emergency diesel engine gen-set (Ref. Nos.: T1 and T2)
NOx as NO2—
97.00 tpyannual
——
p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: engine gen-sets (Ref. Nos. 1 - 62, T1 and T2) included in the Equipment List section of this permit for all purposes shall not exceed the limits specified below: Nitrogen Oxides (as NO2) 97.00 tpy Carbon Monoxide (CO) 51.07 tpy
each Caterpillar 3516C emergency diesel engine gen-set (Ref. Nos.: T1 and T2)
NOx as NO2—
51.07 tpyannual
——
p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: permit for all purposes shall not exceed the limits specified below: Nitrogen Oxides (as NO2) 97.00 tpy Carbon Monoxide (CO) 51.07 tpy Volatile Organic Compounds (VOC) 10.69 tpy
each Caterpillar 3516C emergency diesel engine gen-set (Ref. Nos.: T1 and T2)
VOC—
10.69 tpyannual
——
p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides (as NO2) 97.00 tpy Carbon Monoxide (CO) 51.07 tpy Volatile Organic Compounds (VOC) 10.69 tpy Particulate Matter (PMio) 3.50 tpy
each Caterpillar 3516C emergency diesel engine gen-set (Ref. Nos.: T1 and T2)
PM—
3.50 tpyannual
——
p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: Carbon Monoxide (CO) 51.07 tpy Volatile Organic Compounds (VOC) 10.69 tpy Particulate Matter (PMio) 3.50 tpy Particulate Matter (PM2.5) 3.50 tpy
each Caterpillar 3516C emergency diesel engine gen-set (Ref. Nos.: T1 and T2)
PM2.5—
3.50 tpyannual
——
p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: Volatile Organic Compounds (VOC) 10.69 tpy Particulate Matter (PMio) 3.50 tpy Particulate Matter (PM2.5) 3.50 tpy These emissions are derived from the estimated overall emission contribution from
NOx as NO2—
38.7 tpyannual
——
p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: Nos.: 1 - 62) for maintenance checks and readiness testing shall not exceed the limits specified below: Nitrogen Oxides (as NO2) 38.7 tpy Carbon Monoxide (CO) 20.9 tpy I
NOx as NO2—
20.9 tpyannual
——
p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: specified below: Nitrogen Oxides (as NO2) 38.7 tpy Carbon Monoxide (CO) 20.9 tpy I Volatile Organic Compounds (VOC) 4.4 tpy
VOC—
4.4 tpyannual
——
p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides (as NO2) 38.7 tpy Carbon Monoxide (CO) 20.9 tpy I Volatile Organic Compounds (VOC) 4.4 tpy Particulate Matter (PMio) 1.4 tpy
PM—
1.4 tpyannual
——
p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: Carbon Monoxide (CO) 20.9 tpy I Volatile Organic Compounds (VOC) 4.4 tpy Particulate Matter (PMio) 1.4 tpy Particulate Matter (PM2.5) 1.4 tpy
PM2.5—
1.4 tpyannual
——
p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: Volatile Organic Compounds (VOC) 4.4 tpy Particulate Matter (PMio) 1.4 tpy Particulate Matter (PM2.5) 1.4 tpy These emissions are derived from the estimated overall emission contribution from
visible emissions—
5 percent opacityvisible
——
p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: (9 VAC 5-80-1180) 16. Visible Emission Limit - Visible emissions from each emergency diesel engine gen-set included in the Equipment List section of this permit shall not exceed 5% opacity except during one 6-minute period in any one hour in which visible emissions shall not exceed
visible emissions—
10 percent opacityvisible
——
p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: included in the Equipment List section of this permit shall not exceed 5% opacity except during one 6-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 condition applies at all times except during startup, shutdown and malfimction.
visible emissions—
20 percent opacityvisible
——
p. 11 ↗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 6-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.