• Make sure the exhaust ventilation system is fully
operational by checking the static pressure drop at the
exhaust ducts leading from the equipment at both of the
following times:
– When installation is completed
– Annually after installation.
• Repair or clean exhaust systems when either of the
following occur:
– Dust leaks are found; or
– The pressure drop gauge indicates a change exceeding 20
percent.
• Use an abrasive separator to separate larger particles
for reuse on installations where abrasive is recirculated.
• Set up dust collecting equipment to do both of the
following:
– Empty and remove accumulated dust without contaminating
work areas
– Discharge the air used in blast cleaning equipment.
Note:
Dispose fine dust from dry collectors by doing one of the following:
• Emptying and transporting the fine dust in enclosed containers
• Using a sluice with a wetting process to contain the dust.