Section 296-818-40015. Inspection and maintenance.

You must:

• 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.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 06-12-074, § 296-818-40015, filed 6/6/06, effective 9/1/06.]

RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 06-12-074, § 296-818-40015, filed 6/6/06, effective 9/1/06.