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Contact Information
Office of
Public Safety
Westmont College
955 La Paz Road
Santa Barbara, CA 93108

Chemical Hygiene Plan

6.0 Protective Controls

6.1 Control Criteria and Verification

Engineering and administrative controls are important and effective methods for limiting personnel exposure to chemicals. The most effective way to prevent adverse health effects from chemical exposure is to substitute less hazardous chemicals. (For example, substitute toluene for benzene or use aqueous soap instead of an organic solvent for cleaning). Note that substitution is not always practical or feasible in research laboratory operations, therefore the following controls can be implemented:

6.2 Administrative Controls

Administrative controls for minimizing employee exposure to hazardous chemicals include:

  • Following SOPs for work involving hazardous chemicals. Following general safety and health procedures (see Appendix A, General Procedures).
  • Plans review for new and renovated equipment and work areas prior to installation or construction.
  • Substitution of less hazardous equipment (e.g. using safety cans instead of class bottles).
  • Scaling down the size of the experiments.
  • Isolating the operator or process.
  • Prior approval for laboratory activities involving particularly hazardous substances or procedures.

6.3 Engineering Controls

Engineering controls are considered very reliable for protecting employees and the environment, and include:

  • Chemical fume hoods, glove boxes, closed systems, and other isolated devices. Note that fume hoods shall comply with 8 CCR 5154.1, Ventilation Requirements for Laboratory-Type Hood Operations.
  • Air contaminant removal devices (e.g., cold traps, HEPA filters) to minimize contamination of exhaust ventilation and the exterior environment.
  • Negative air pressure of the work place relative to common areas.
  • Non-permeable work surfaces.
  • Secondary containment trays.

6.4 Performance Verification of Engineering Controls And Equipment

Engineering controls and equipment must function properly at all times in order to protect the health and safety of laboratory employees. This equipment must be tested according to the following schedule:

Equipment Testing Frequency (minimum) Responsible Party Standard
Eye Wash Weekly Flush Physical Plant ANSI Z358.1 - 1990
Safety Shower Monthly Physical Plant n/a
Fume Hoods Annually Physical Plant 8CCR 5154.1, ANSI/AIHA Z9.5 - 1992 and ANSI/ASHRAE 110 - 1985
HVAC Systems Annually Physical Plant As per design specifications
Fire Extinguishers Monthly Visual Inspection Physical Plant 19CCR 574.1
Annually Physical Plant 19CCR 574.1