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
Laboratory Ventilation Codes and Standards
Siemens Industry, Inc. 34
Topic Requirement(s) Commentary
(Special
Purpose)
Perchloric
Acid
(Continued)
A8.11.8 Perchloric acid hoods should be washed down after each use.
8.11.8.1 The hood work surface shall be watertight with a minimum depression of 13
mm (1/2 in.) at the front and sides.
8.11.8.2 An integral trough shall be provided at the rear of the hood to collect wash-
down water.
8.11.9 The hood baffle shall be removable for inspection & cleaning.
8.11.10 If a chemical fume hood or exhaust system was used for perchloric acid
heated above ambient temperature, tests shall be conducted for explosive
perchlorates before any inspection, cleaning, maintenance, or any other work is done
on any part of the exhaust system or hood interior.
8.11.11 Prior to using a perchloric acid hood for any purpose, the hood shall be water-
washed and shall be tested according to 8.11.9 to ensure residual perchlorates are
not present.
12.1.2.5 Strong oxidizing materials, such as perchloric acid, shall not be heated by
gas flames or oil baths.
American Conference of Governmental Industrial Hygienists (ACGIH)
INDUSTRIAL VENTILATION A Manual of Recommended Practice, 27th Edition
VS-35-03 (PERCHLORIC ACID HOOD DATA)
1. Do not use perchloric acid in a hood designed for other purposes. Identify
perchloric acid hoods with large warning signs.
2. Provide exhaust ventilation and room supply air with minimal challenge to hood.
3. Utilize local exhaust ventilation within the hood to minimize condensation of vapors
inside the hood.
4. Locate all utility controls outside the hood.
5. Materials of construction for this type of hood and duct must be nonreactive, and
acid resistant, and relatively impervious. AVOID ORGANIC MATERIALS unless
known to be safe. Stainless steel type 316 with welded joints is preferred.
Unplasticized polyvinyl chloride or an inorganic ceramic coating, such as porcelain,
is acceptable.
6. Ease of cleanliness is paramount. Use stainless steel with accessible rounded
corners and all welded construction.
7. The work surface should be watertight with a minimum of 0.5 inch dished front and
sides and an integral trough at the rear to collect the washdown water.
8. Design washdown facilities into the hood and duct. Use daily or more often to
thoroughly clean perchloric acid from the exhaust system surfaces.
(Continued on Next Page)