Wood preservation facilites, pentachlorophenol thermal: chapter F, table 12


Table 12. Additional Recommended Design Features for Chemical Mixing Systems

(Use in conjunction with Part I, Chapter A - General Recommendations for All Wood Preservatives, Table 12.)

Design feature Recommendations

PCP

  • PCP blocks
  • Petroleum oil

Objectives:

  • To provide a mixing system with effective spill prevention features
  • To provide a mixing system that minimizes worker contact with PCP
Configuration
  • Mixing by block placement in a closed tank is the preferred method.
  • Use permanent, closed mixing systems (rigidly piped, tank to tank).
Location/shelter
(mixing tanks)
  • Locate in a contained, dry sheltered area (giving attention to worker comfort).
  • Provide protection against freezing (as applicable).
Solids handling
  • Provide appropriate equipment for safe, controlled lifting and handling of PCP blocks.
  • Provide a dry, concrete / paved area for plastic wrap removal from blocks.
  • Ventilate to control air levels of PCP during routine operation and during worst event spills.
  • Provide a vacuum cleaner system (filtered exhaust) for effective cleanup of PCP dust and granules from handling/transfer operations.
  • Provide local exhaust system and closed solids handling systems (e.g. flexible covers on hoppers) to eliminate direct worker exposure to PCP dust and granules during unwrapping
Splash protection
  • Not Applicable.

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