Basic Documentation
Table Of Contents
- Introduction
- Applicable Definitions (Alphabetical Listing)
- Laboratory Safety
- Hazard Assessment
- Chemical Hygiene Plan
- Chemical Hygiene Responsibilities
- Fume Hoods
- When Required & Safe Usage
- Gloveboxes:
- Face Velocity
- Face Velocity Setback
- Size & ADA Compliance
- CAV (Constant Air Volume) Bypass
- CAV (Constant Air Volume) Conventional
- VAV (Variable Air Volume)
- VAV Diversity
- Automatic Sash Closure
- Safe Operation of Sashes
- Accessories, Services and Explosion Protection
- Ductless
- Auxiliary Air
- (Special Purpose) Perchloric Acid
- Room Air Cross Currents
- Minimum Exhaust
- Monitoring
- Selection Criteria and Performance Specifications
- Laboratory Design & Fume Hood Implementation
- Maintenance
- Periodic Testing
- Test Procedures
- Signage and Recordkeeping
- Shutdown Procedures
- Evaluating CAV (Constant Air Volume) Systems
- Evaluating VAV (Variable Air Volume) Systems
- Biological Laboratories
- Biosafety Level 1
- Biosafety Level 2
- Biosafety Level 3
- Biosafety Level 4
- Ventilation for Biosafety Level 1
- Ventilation for Biosafety Level 2
- Ventilation for Biosafety Level 3
- Ventilation for Biosafety Level 4, Cabinet Laboratory
- Ventilation for Biosafety Level 4, Suit Laboratory
- Containment Levels - Canada
- Containment Levels and Ventilation Requirements: Canada
- Biological Safety Cabinets and Classifications
- Biosafety Cabinet Applications
- Biosafety Cabinets – Installation and Safe Usage Recommendations
- Biosafety Cabinets – Certification and Safe Usage - Canada
- Biological Safety Cabinet Design, Construction and Performance Requirements
- Biosafety Cabinet Testing
- Ventilation Systems
- Local Ventilation -When Required
- Ventilation Rates for Animal Rooms
- Ventilation Rates for Animal Rooms
- Ventilation Rates for Biological Labs
- Ventilation Rates for Chemical Laboratories
- Ventilation rates for Storage areas
- Room Supply Air
- Supply Air Quality and Filtration
- Room and Duct Pressurization
- Human Occupancy, Room Temperature and Humidity
- Animal Rooms Room Temperature and Humidity
- Load Calculations
- Room Sound Level and Vibration
- Emergency Control Provisions
- Energy Conservation
- Monitoring
- Maintenance
- Periodic Inspection and Testing
- Periodic Inspection and Testing - Canada
- Test Records
- Management
- Exhaust Systems
- Configuration
- Leakage
- Components
- Manifolded Systems
- Air Velocity
- Stack Height and Discharge Location
- Operational Reliability
- Recirculated Air and Cross Contamination
- Materials and Fire Protection
- Commissioning
- Commissioning - Canada
- Referenced Publications
Exhaust Systems
Siemens Industry, Inc. 145
Topic Requirement(s) Commentary
Recirculated
Air and Cross
Contamination
(Continued)
American National Standard for Laboratory Ventilation ANSI/AIHA Z9.5-2003
5.3.4 The discharge of potentially contaminated air that contains a concentration
more than the allowable breathing air concentration shall be:
• Direct to the atmosphere unless the air is treated to the degree necessary for
recirculation (See Section 9.3);
5.3.6 Nonlaboratory air or air from building areas adjacent to the laboratory may be
used as part of the supply air to the laboratory if its quality is adequate.
5.3.6.1 Air exhausted from the general laboratory space (as distinguished from
laboratory chemical hoods) shall not be recirculated to other areas unless one of the
following sets of criteria is met:
1) Criteria A
• There are no extremely dangerous or life-threatening materials used in the
laboratory;
• The concentration of air contaminants generated by maximum credible accident
will be lower than short-term exposure limits required by 2.1.1;
• The system serving the laboratory chemical hoods is provided with installed
redundancy, emergency power, and other reliability features as necessary.
2) Criteria B
• Recirculated air is treated to reduce contaminant concentrations to those
specified in 2.1.1.
• Recirculated air is monitored continuously for contaminant concentrations or
provided with a secondary backup air-cleaning device that also serves as a
monitor (via a HEPA filter in a series with a less efficient filter, for particulate
contamination only). Refer to Section 9.3.1;
• Provision for 100% outside air, whenever continuous monitoring indicates an
alarm condition.
5.3.6.2 Exhaust air from laboratory hoods shall not be recirculated to other areas.
Hood exhaust air meeting the same criteria as noted in Section 5.3.6.1 shall only be
recirculated to the same work area where the hood operators have control of the
hood work practices and can monitor the status of air cleaning.
American Institute of Architects, GUIDELINES FOR PLANNING AND DESIGN OF
BIOMEDICAL RESEARCH LABORATORY FACILITIES 1999
C.14.4 Hazardous Waste Storage and Handling
h. A separate ventilation system shall be installed for the storage room. Exhaust
shall be directed away from the building and the buildings’ air intakes. This
ventilation system shall be connected to the building’s standby power system and
contain appropriate filtration and monitoring devices.
(Continued on Next Page)
See applicable commentary on the previous
page.