NYC 9/11 Public Portal Document
Hillmann Environmental Croup, 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
NZOSH National Institute for Occupational Safety and Health
OSHA Occupational Safety and Health Administration
CPU/m' Colony forming units per cubic meter of air
F/cc Fibrous dust per cubic centimeter of air
HVAC Heating, ventilation & air-conditioning
mg/m 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
22 Cortlandt Street/New York. NY/Project Number Y2-1458 Page 25
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