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UNC Chapel Hill - Department of Facilities Services - EHS Design Guidelines for Emergency Generators, 2013
- EHS DESIGN GUIDELINES FOR EMERGENCY GENERATORS
- TABLE OF CONTENTS
- I. GENERAL [Go to Page]
- A. BACKGROUND
- B. Generator Location
- C. Additional Design Location Requirements
- D. Emissions Modeling [Go to Page]
- 1. EPA standards for Ambient Air Quality [Go to Page]
- a) Proximity of receptors
- b) Passersby
- c) Open windows
- d) Building air intakes
- e) Confined spaces
- 2. Recommended Personnel Exposure Limits [Go to Page]
- a) < 1ppm NO2 in 15 min. (NIOSH STEL) {assume NO2 is 34% of total NOx from RWDI- Science Complex Study ‘02}
- b) <0.02 mg/M3 respirable, Elemental Carbon (EC) (ACGIH Notice of Intended Changes) {assume 40% of total particulate matter is EC from www.dieselnet.com/standards/us/ohs.html}
- c) 4000:1 dilution or greater from the generator stack discharge- typically reduces the nuisance odors to nondetect levels for 50% of the population (from RWDI)
- E. Approval
- F. Additional Design Consideration
- G. Comments for Designers on Selecting New Generators (8/13/03):
- H. Desirable emission features for new generators are as follows:
- II. EMERGENCY GENERATOR DATA SHEET [Go to Page]
- A. Please provide a brief description of the intended use of the emergency generator.
- B. Where will the generator be located? (e.g., indoors, outdoors in enclosure)
- C. Identify the fuel being used (e.g., diesel oil, natural gas, etc.)
- D. What is the unit rated for? (in kW)
- E. Provide exhaust emission data and exhaust building/enclosure, then the exhaust flow rate (actual ft3/s) and temperature (Fahrenheit degrees) are required.
- F. Provide the stack exit diameter (in feet)
- G. Provide the stack height above the roof (in feet).
- H. H. Provide the stack height above grade (in feet).
- I. I. If the generator is located indoors, please provide the following:
- J. If the generator is located outdoors in an enclosure, please provide the following:
- K. Provide the distance from the ventilation openings for combustion air intake/exhaust or the combustion exhaust stack (whichever is closer) to the nearest residential property line (if the residences are located on-site, then provide the distance to...
- L. If there are any sensitive receptors (e.g., hospital, school, nursing home, day care center) within 1,500 feet of the exhaust stack, please provide details of their location
- M. Provide exhaust emission information, if available. Include equipment data sheet, if available
- N. Is the required fuel readily available on campus?
- O. Provide the maximum sulfur content of fuel to be burned [Go to Page]
- (END OF SECTION) [Go to Page]
