NYC 9/11 Public Portal Document
Hillmann Environmental Group, LLC
SECTION 6- APPENDICES
6.1 List of Abbreviations
AIHA American Industrial Hygiene Association
ACGIH American Conference of Governmental Industrial Hygienists
ASHRAE American Society of Heating, Refrigeration and Air-conditioning
Engineers
CDC Centers for Disease Control
EPA Environmental Protection Agency
NAAQS National Ambient Air Quality Standard
NIOSH National Institute for Occupational Safety and Health
OSHA Occupational Safety and Health Administration
CFU/m3 Colony forming units per cubic meter of air
F/cc Fibrous dust per cubic centimeter of air
HVAC Heating, ventilation & air-conditioning
mg/m3 Milligrams per cubic meter of air
PEL Permissible exposure level. This is the enforceable standard.
pCi/L Picocuries per liter of air
ppm Parts per million
TLV Threshold limit value
TWA Time weighted average
Cushman & Wakefzeldl44 Wall Street, New York, NY/Project Number N3-7476 Page 11
NYC-WTC 000094943
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