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Proposed Air Quality Permits 6249-R1 and 6250-R1, AT&T Corp

Friday, May 29, 2015


Proposed Air Quality Permits 6249-R1 and 6250-R1, AT&T Corp., Two existing 1,600 kWe diesel fired emergency generator sets at 725 13th Street NW

Notice is hereby given that, pursuant to 40 C.F.R. Part 51.161, D.C. Official Code §2-505, and 20 DCMR §210, the Air Quality Division (AQD) of the District Department of the Environment (DDOE), located at 1200 First Street, NE, Washington, D.C., intends to issue two air quality permits (#6249-R1 and #6250-R1) to AT&T Corp. to amend and renew permits for the operation of two (2) identical 1,600 kWe emergency generator sets with 2,145 hp engines and to permit a switch from kerosene to ultra-low sulfur  diesel as the units’ only fuel, at the AT&T Corp. property located at 725 13th Street NW, Washington DC 20005.  The contact person for the facility is Debra Moran at (415) 778-1312.

Two applications were submitted to request to amend two previously issued permits (6249-A1 and 6250-A1) that were issued on February 28, 2011. The request was to allow a switch from kerosene to ultra-low sulfur diesel as allowable fuel for the engines. Below are the expected differences in the emission for each of the two units resulting from the fuel switch and establishment of a related limit on the allowable hours of operation of the units.

Pollutants Former Potential-to Emit with Kerosene (tons/year) New Potential-to Emit  with Diesel (tons/year) Difference (tons/year)
Total Particulate Matter (PM Total) 0.4 0.26 0.14 (decrease)
Oxides of Sulfur (SOx) 2.1 0.01 2.09 (decrease)
Oxides of Nitrogen (NOx) 8.21 8.75 -0.54 (increase)
Volatile Organic Compounds (VOC) 0.4 0.26 0.14 (decrease)
Carbon Monoxide (CO) 2.8 2.01 0.79 (decrease)

The permit applications and supporting documentation, along with the draft permits are available for public inspection at AQD and copies may be made available between the hours of 8:15 A.M. and 4:45 P.M. Monday through Friday.  Interested parties wishing to view these documents should provide their names, addresses, telephone numbers and affiliation, if any, to Stephen S. Ours at (202) 535-1747.

Interested persons may submit written comments or may request a public hearing on this subject within 30 days of publication of this notice.  The written comments must also include the person’s name, telephone number, affiliation, if any, mailing address and a statement outlining the air quality issues in dispute and any facts underscoring those air quality issues.  All relevant comments will be considered in issuing the final permit.

Comments on the proposed permit and any request for a public hearing should be addressed to:

Stephen S. Ours     
Chief, Permitting Branch - Air Quality Division

District Department of the Environment
1200 First Street NE, 5th Floor
Washington, DC 20002

[email protected]

No written comments or hearing requests postmarked after June 29, 2015 will be accepted.

For more information, please contact Stephen S. Ours at (202) 535-1747.