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Proposed Air Quality Permits 6988-6990 - Sibley Memorial Hospital

Friday, May 22, 2015


Proposed Air Quality Permits 6988-6990, Sibley Memorial Hospital – Johns Hopkins Medicine, Three 14.7 MMBTU/hr dual fuel fired boilers at the Patient Tower structure at Sibley Memorial Hospital, 5255 Loughboro Road 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, 5th Floor, Washington, DC, intends to issue three air quality permits (Nos. 6988 through 6990) to Sibley Memorial Hospital – Johns Hopkins Medicine to construct and operate three 14.7 MMBtu per hour rated heat input dual fuel (natural gas and either No. 2 fuel oil or diesel fuel) boilers located on the Concourse Level of the Patient Tower portion of Sibley Memorial Hospital, 5255 Loughboro Road NW, Washington, DC 20057. The contact person for facility is Lorenzo Bell, Chief Engineer, at (202) 537-4693. 


Maximum emissions from each of the three 14.7 MM Btu per hour, limited to burning 85 million standard cubic feet (MMscf) natural gas  per year and operating on No. 2 fuel oil or diesel fuel for no more than 942 hours per year, is expected to be as follows:


Maximum Annual Emissions



Total Particulate Matter (PM Total)


Sulfur Dioxide (SO2)


Nitrogen Oxides (NOx)


Volatile Organic Compounds (VOC)


Carbon Monoxide (CO)


The proposed overall emission limits for the equipment are as follows:

  1. Each of the 14.7 MMBtu per hour dual fuel–fired boilers shall not emit pollutants in excess of those specified in the following table [20 DCMR 201]:



Short-Term Limit

(Natural Gas) (lb/hr)

Short-Term Limit

(No. 2 Fuel oil) (lb/hr)

Carbon Monoxide (CO)



Oxides of Nitrogen (NOx)



Total Particulate Matter (PM Total)*



Oxides of Sulfur (SOx)



*PM Total includes both filterable and condensable fractions.  Note that compliance with Conditions III(a) and (b) will be considered compliance with these PM Total standards, unless other credible evidence of a violation is identified.

b.   Visible emissions shall not be emitted into the outdoor atmosphere from the boilers, except that discharges not exceeding forty percent (40%) opacity (unaveraged) shall be permitted for two (2) minutes in any sixty (60) minute period and for an aggregate of twelve (12) minutes in any twenty-four hour (24 hr.) period during start-up, cleaning, adjustment of combustion controls, or malfunction of the equipment [20 DCMR 606.1]

c.   An emission into the atmosphere of odorous or other air pollutants from any source in any quantity and of any characteristic, and duration which is, or is likely to be injurious to the public health or welfare, or which interferes with the reasonable enjoyment of life or property is prohibited. [20 DCMR 903.1]

d.   Total suspended particulate matter (TSP) emissions from the boilers shall not exceed 0.09 pound per million BTU. [20 DCMR 600.1]

e.   Emissions shall not exceed those achieved with the performance of annual combustion adjustments on the boilers.  To show compliance with this condition, the Permittee shall, each calendar year, perform adjustments of the combustion processes of the boilers with the following characteristics [20 DCMR 805.8(a) and (b)]:

1.   Inspection, adjustment, cleaning or replacement of fuel burning equipment, including the burners and moving parts necessary for proper operation as specified by the manufacturer;

2.   Inspection of the flame pattern or characteristics and adjustments necessary to minimize total emissions of NOx and, to the extent practicable, minimize emissions of CO;

3.   Inspection of the air-to-fuel ratio control system and adjustments necessary to ensure proper calibration and operation as specified by the manufacturer; and

4.   Adjustments shall be made such that the maximum emission rate for any contaminant does not exceed the maximum allowable emission rate as set forth in this section.

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 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 22, 2015 will be accepted.

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