eliminating and controlling dust & noise hazards july 2002

Eliminating and Eliminating and ControllingControlling

Dust & Noise Dust & Noise HazardsHazards

July 2002

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EXPOSURE CONTROLS

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EFFECTIVE EXPOSURE CONTROL

Controls the hazard - reduces health threat

Promotes ability to work in comfort

Protects all potentially exposed workers

The control itself should not create a hazard.

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POINTS OF CONTROL

Miner

Path

Sourceof contaminant

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TYPES OF CONTROLS

ENGINEERING

ADMINISTRATIVE

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Preventing Hazard Generation

ENGINEERING

SUBSTITUTION

PROCESS CHANGE

PURCHASE EQUIPMENT

THAT WON’T PRODUCE

HAZARDS

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Engineering ControlsEngineering Controls

Design right to start with!Redesign as necessaryMaintain UtilizeSample to determine effectivenessTrain the workersUpdate with technology changes

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ENGINEERING REDESIGN EXAMPLES

AUTOMATE PARTS OF THE PROCESS

FOR EXAMPLE: COMPUTERIZED LOADING

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Engineering Controls

Operator redesigns crusher controls; puts operator in booth.

Reduce speed of moving parts.

Redesign spouts in bagging.

Use water, mist or fog sprays.

Replace metal parts with nonmetal parts.

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Engineering Controls (used after hazard is

generated)

Ventilation» General

» Dilution Ventilation

» Local Exhaust

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LOCAL EXHAUST VENTILATION

HOODSHOODS - Captures substance DUCT WORKDUCT WORK - Carries substance away FANSFANS - Move AIR through duct work AIR CLEANERAIR CLEANER - Removes substance and

removes it before air returns to environment MAKE-UP AIRMAKE-UP AIR - Replace air exhausted by

system

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Check seals

Regular Inspection and MaintenanceRegular Inspection and Maintenance

Is Absolutely Necessary!

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Something’s not right!Something’s not right!

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ENCLOSURE & ISOLATIONENCLOSURE & ISOLATIONEnvironmental Cab

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Engineer Out Path Noise with Barriers

INCREASE DISTANCE

AT THE SOURCESelect quiet equipmentReduce impact or impulsive forcesReduce speed in machines

IN THE TRANSMISSION PATHSeparate noise and receiverUse sound absorbing materials

Barrier ConceptBarrier Concept

Shadow

Zone

DiffractedDiffracted

PropagatedPropagatedReflectedReflected

Noise SourceNoise Source

BarrierBarrier

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Work PracticesWork Practices

Vacuums with HEPA filters

NO dry sweeping

Use wet methods X

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ADMINISTRATIVE ADMINISTRATIVE CONTROLSCONTROLS

ROTATE WORKERS / WORK SCHEDULES

ESTABLISH REGULATED AREAS

WARNING SIGNS & BARRICADES

EDUCATION & TRAINING

ELIMINATE THE JOB

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HAZARD TRAINING INCLUDES:

HAZARDS OF MATERIAL OR PHYSICAL AGENT

HAZARD RECOGNITION

EFFECTIVE CONTROL MEASURES

PPE PROGRAMS

•INVOLVES:

-SUPERVISORS

-MINERS

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ACCOMPLISHED BY:ACCOMPLISHED BY:

FORMAL TRAINING

HEALTH AND SAFETY MEETINGS

BOOKLETS

SIGNS AND LABELS

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NOISE HAZARDOUS AREA

HEARING PROTECTION

REQUIRED

WARNING SIGNS

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SUPERVISOR SUPERVISOR EDUCATIONEDUCATION

WHEN / WHERE TO GET HELP

LEGAL / CORPORATE RESPONSIBILITIES

COST / BENEFIT INFORMATION

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MINER EDUCATIONMINER EDUCATION

SAFETY AND HEALTH HAZARD EDUCATION

OPERATING PROCEDURES - EFFECTIVE USE OF CONTROLS

UNDERSTANDING MAINTENANCE NEEDS

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MINE OPERATOR MUST BE COMMITTED!

FURNISH SAFE / HEALTHY FACILITIES

TRAIN MINERS

CONTROL HAZARDS

MONITOR THE WORKPLACE

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MINERS:

OBSERVE RULES - work practices, cleanup, hygiene

NOTIFY SUPERVISORS OF HAZARDOUS CONDITIONS AND PROBLEMS WITH CONTROL MEASURES

MAINTENANCE USE REQUIRED PPE

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CONTROL EXPOSURES AT POINT OF WORKER

JOB ROTATION

ENCLOSURES/Booths/Cabs

TRAINING & EDUCATION

PERSONAL MONITORING

MAINTENANCE PROGRAMS

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PERSONAL PROTECTIVE EQUIPMENT

HEALTH HAZARD CONTROL

RESPIRATORS

HEARING PROTECTION

COVERALLS, GLOVES, BOOTS, GLASSES, HARD HATS

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Use PPE Use PPE

WHEN……. Other controls are being

developed and installed Additional protection is

needed The hazards can’t be

controlled any other way

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AIRBORNE CONTAMINANTS: 56/57.5005

NOISE: Part 62

DRILL DUST CONTROL: 58.620

MSHA REGULATIONS30 CFR