Code of Massachusetts Regulations › 780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS › Chapter 4 - Special Detailed Requirements Based on Use and Occupancy › Section 415 - GROUPS H-1, H-2, H-3, H-4 AND H-5 › Subsection 415.2 - Definitions

Current through Register 1525, July 5, 2024
The following words and terms shall, for the purposes of
				  this chapter and as used elsewhere in the code, have the meanings shown herein.
				  [F]
CONTINUOUS GAS DETECTION SYSTEM.
A gas
				  detection system where the analytical instrument is maintained in continuous
				  operation and sampling is performed without interruption. Analysis is allowed
				  to be performed on a cyclical basis at intervals not to exceed 30 minutes.
				  [F]
DETACHED BUILDING.
A separate single-story
				  building, without a basement or crawl space, used for the storage or use of
				  hazardous materials and located an
approved
distance from all
				  structures. [F]
EMERGENCY CONTROL STATION.
An
approved
location on the premises where signals from emergency
				  equipment are received and which is staffed by trained personnel. [F]
EXHAUSTED ENCLOSURE.
An appliance or piece of
				  equipment that consists of a top, a back and two sides providing a means of
				  local exhaust for capturing gases, fumes, vapors and mists. Such enclosures
				  include laboratory hoods, exhaust fume hoods and similar appliances and
				  equipment used to locally retain and exhaust the gases, fumes, vapors and mists
				  that could be released. Rooms or areas provided with general ventilation, in
				  themselves, are not exhausted enclosures. [F]
FABRICATION AREA.
An area within a
				  semiconductor fabrication facility and related research and development areas
				  in which there are processes using hazardous production materials. Such areas
				  are allowed to include ancillary rooms or areas such as dressing rooms and
				  offices that are directly related to the fabrication area processes. [F]
FLAMMABLE VAPORS OR FUMES.
The concentration of
				  flammable constituents in air that exceed 25 percent of their lower flammable
				  limit (LFL). [F]
GAS CABINET.
A fully enclosed, noncombustible
				  enclosure used to provide an isolated environment for compressed gas cylinders
				  in storage or use. Doors and access ports for exchanging cylinders and
				  accessing pressure-regulating controls are allowed to be included. [F]
GAS ROOM.
A separately ventilated, fully
				  enclosed room in which only compressed gases and associated equipment and
				  supplies are stored or used. [F]
HAZARDOUS PRODUCTION MATERIAL (HPM).
A solid,
				  liquid or gas associated with semiconductor manufacturing that has a
				  degree-of-hazard rating in health, flammability or instability of Class 3 or 4
				  as ranked by NFPA 704 and which is used directly in research, laboratory or
				  production processes which have as their end product materials that are not
				  hazardous. [F]
HPM FLAMMABLE LIQUID.
An HPM liquid that is
				  defined as either a Class I flammable liquid or a Class II or Class IIIA
				  combustible liquid. [F]
HPM ROOM.
A room used in conjunction with or
				  serving a Group H-5 occupancy, where HPM is stored or used and which is
				  classified as a Group H-2, H-3 or H-4 occupancy. [F]
IMMEDIATELY DANGEROUS TO LIFE AND HEALTH
				  (IDLH).
The concentration of air-borne contaminants which poses a threat
				  of death, immediate or delayed permanent adverse health effects, or effects
				  that could prevent escape from such an environment. This contaminant
				  concentration level is established by the National Institute of Occupational
				  Safety and Health (NIOSH) based on both toxicity and flammability. It generally
				  is expressed in parts per million by volume (ppm v/v) or milligrams per cubic
				  meter (mg/m3). If adequate data do not exist for
				  precise establishment of IDLH concentrations, an independent certified
				  industrial hygienist, industrial toxicologist, appropriate regulatory agency or
				  other source
approved
by the
building
				  official
shall make such determination. [F]
LIQUID.
A material that has a melting point
				  that is equal to or less than 68°F (20°C) and a boiling point that is
				  greater than 68°F (20°C) at 14.7 pounds per square inch absolute (psia)
				  (101 kPa). When not otherwise identified, the term "liquid" includes both
				  flammable and combustible liquids. [F]
LIQUID STORAGE ROOM.
A room classified as a
				  Group H-3 occupancy used for the storage of flammable or combustible liquids in
				  a closed condition. [F]
LIQUID USE, DISPENSING AND MIXING ROOM.
A room
				  in which Class I, II and IIIA flammable or combustible liquids are used,
				  dispensed or mixed in open containers. [F]
LOWER FLAMMABLE LIMIT (LFL).
The minimum
				  concentration of vapor in air at which propagation of flame will occur in the
				  presence of an ignition source. The LFL is sometimes referred to as "LEL" or
				  "lower explosive limit." [F]
NORMAL TEMPERATURE AND PRESSURE (NTP).
A
				  temperature of 70°F (21°C) and a pressure of 1 atmosphere [14.7 psia
				  (101 kPa)]. [F]
PHYSIOLOGICAL WARNING THRESHOLD LEVEL.
A
				  concentration of air-borne contaminants, normally expressed in parts per
				  million (ppm) or milligrams per cubic meter (mg/m3),
				  that represents the concentration at which persons can sense the presence of
				  the contaminant due to odor, irritation or other quick-acting physiological
				  response. When used in conjunction with the permissible exposure limit (PEL)
				  the physiological warning threshold levels are those consistent with the
				  classification system used to establish the PEL. See the definition of
				  "Permissible exposure limit (PEL)" in the
International Fire
				  Code
. [F]
SERVICE CORRIDOR.
A fully enclosed passage used
				  for transporting HPM and purposes other than required
means of
				  egress
. [F]
SOLID.
A material that has a melting point,
				  decomposes or sublimes at a temperature greater than 68°F (20°C).
				  [F]
STORAGE, HAZARDOUS MATERIALS.
[F]
1. The keeping, retention or leaving of hazardous materials
				  in closed containers, tanks, cylinders or similar vessels, or
2. Vessels supplying operations through closed connections to
				  the vessel.
USE (MATERIAL).
Placing a material into action,
				  including solids, liquids and gases. [F]
WORKSTATION.
A defined space or an independent
				  principal piece of equipment using HPM within a fabrication area where a
				  specific function, laboratory procedure or research activity occurs.
Approved
or
listed
hazardous materials
				  storage cabinets, flammable liquid storage cabinets or gas cabinets serving a
				  workstation are included as part of the workstation. A workstation is allowed
				  to contain ventilation equipment, fire protection devices, detection devices,
				  electrical devices and other processing and scientific equipment. [F]