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## Social Services Amno'1y W. Mitcneli. Ph.D .• ::xecutive**Dire::o~** 533-6108 July 12,1979

Alfred J. Nowoweijski Deputy Civil Engineer Civil Engineering Division Department of the Air Force Headquarters 2849th Air Base Grotip (AFLC) Hill Air Force Base,**~tah** 84406 Re: Air Quality Approval Order for Remodeling Base Exchange SX Service Station Dear Mr. Nowoweijski: The thi rty-day comment peri od ended 0 n Jul y 7, 1979 a nd no comments were received. Installation of the three new 10,000 gallon underground storage tanks which are to be equipped with submerged-fill equipment and a vapor return line is approved under the following conditions: 1. The proposed installation be as described in the May 15, '1979 Notice of Intent to Construct and as approved by the Executive Secretary.

. 2. The equipment be maintained and operated according to accepted operational and engineering practices. Because we must both schedule and perform an initial compliance inspection, please give us an estimate of the date when the new equipment will be placed in service, followed by notice of the actual date. Sincerely,

Alvin E. Rickers Executive Director Utah Air Conservation Committee CAN: jo 

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cc: Weber-Morgan District Health Dept.
Division of Health 150 Lyman J. Olsen. M.D .• M.P.H. P.O. Box 25C DirecTor of Health 4.2.4-1035

An EQual Opportunity Employer

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4.2.4-1038DEPARTMENT OF THE**~1~rf~CE** HEADQUARTERS**Z8pTrle.~S'k1G;J;CUP** (AFLCI HILL AIR**~R~** il-,,(SE. UTAH 840S6 

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### \979 1 5 MAY 

### 1979 AEPLYTO ATTN OF; DE 

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### Relocation of Service Station Pum'p"'Isla-f1ds-" -Hill 

### Air Force Base

- Notice of Intent to Construct

TO, 

### Utah Air Conservation Committee ATTN: Al Rickers, Executive Secretary Bureau of Air Quality P.O. Box 2500 

### Salt Lake City. Utah 84110 1. In compliance with section 3.1 of the State Air Conservation Regulations, the attached "Notice of Intent to Construct" is submitted by Hill AFB, U.S. Air Force. 2. If this office can provide additional information, please feel free to contact Keith Davis at 777-2065.

1. 

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- 1:ifeline of the JCerospact Ueam 4.2.4-1039NOTICE OF INTENT TO CONSTRUCT RELOCATION OF SERVICE STATION PUMP ISLANDS HILL AIR FORCE BASE, UTAH 1. Project Description:

a. The proposed action provides for the remodeling of the existing Base Exchange (BX) service station at Hill AFB within Davis County. The BX service station presently has 3 pump islands; two on the south side and one on the east side. The proposal is to relocate these islands, with new equipment, to the north side of the service station as shown in Figure 1. Also included in the project will be 18,000 SF of paving, three new 10,000 gallon underground storage tanks, utilities and adjacent landscaping. The pump islands will be rem6ved and the existing underground storage tanks will be filled with sand. b. The relocation of the pumps is required to eliminate the existing hazardous traffic conditions and to replace antiquated equipment. The new pump islands will be adjacent to the existing service station to provide garage and gas pumping services at the same general location plus allow adequa te backup space for wa iti ng cars. Currently, duri ng heavy use hours, vehicles will back up restricting flow through the intersection adjacent to the service station. 2. Pollutant Emissions:

a. The primary source of air pollutants from the BX service station is 

# - the emission of volatile organic compounds from the evaporation associated with gasoline transfer, storage and occasional spillage. In 1978,. the 

### ax service station sold approximately 1,954,000 gallons of gasoline and it is assumed that each of the three 10,000 gallon underground storage tanks had an average stored quantity of 5,000 gallons. Utilizing emission factors found in sections 4.3 and 4.4 of the EPA publication AP-42, "Compilation of Air Pollutant Emission Factors", the hydrocarbon (HC) emissions for the existing service station are calculated as outlined below: Emission Opera t ion Factor 1. Storage 0.25 lb/day Kgal Quantity

2. Splash Loading of Underground 11.5lb/Kgal 1 ,954 22,471 Tanks 3. Unloading Delivery Trucks 2. 1 1 b/ Kga 1 1 ,954 4,103 4. Dispensing to Vehicles 11.0 lb/Kgal 1 ,954 21 ,494 5. Liquid Spillage Loss 0.67 lb/Kgal 1 ,954 1 ,309 TOTAL = 50,746 

### = 25.4 tons/yr

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## ), ... ,.-. b. The proposed project will install new underground storage tanks which will have submerged fill equipment and a vapor return line such that vapors displaced during their filling will be returned to the delivery truck. In calculating the reduction in emissions this equipment will make, it is assumed that the commercial trucks delivering fuel will be equipped with a return vapor collection system. Again utilizing emission factors from AP-42, emissions for the altered BX service station are calculated as outlined below: Emission HC Emissions Operation Factor (Lb/Yr) 1,205 Kgal 1. Storage 0.22 lblday 2. Submerged Loading with Open 0.80 1 bl Kga 1 1 ,954 1 ,563 Return Vapor System 3. Unloading Delivery Trucks 2. 1 1 bl Kga 1 1,954 4.103 4. Dispensing to Vehicles 11 .0 1 bl Kga 1 1,954 21,494 5. Liquid Spillage Loss 0.67 lb/Kgal 1,954 1 ,309 TOTAL = 29,674
= 14.8 tons/yr
c. As indicated in the preceeding paragraphs, under ideal situations, the proposed project will reduce HC emissions from the BX service station by about 10.6 tons per year. -There will also be some dust and heavy equipment exhaust created during the construction phase but these quantities will be small and created on a short-term basis only. 3. Air Cleaning Devices: The three new gasoline tanks will have control equipment such that they will be submerged filled and have a vapor return line to return back to the delivery truck those vapors- displaced during filling. No additional air cleaning devices are proposed. 4. Emission Point: All the HC emissions will be due to gasoline evaporation and are emitted at ground level from various locations around the pump islands and storage tanks. The nearest adjacent facility is a small branch exchange (quick-stop type store) located about 150 feet southwest of the pump islands. 5. Sampling Points: No sampling points are anticipated.

4.2.4-1042