Chemwatch : 4883-43 Version No : 3.1.1.1
Page 5 of 14 Fido ' s Herbal Shampoo
Issue Date : 12 / 20 / 2013 Print Date : 07 / 05 / 2016 acclimate the worker to the irritant warning properties of these substances thus increasing the risk of overexposure .
Exposure controls
Engineering controls are used to remove a hazard or place a barrier between the worker and the hazard . Well-designed engineering controls can be highly effective in protecting workers and will typically be independent of worker interactions to provide this high level of protection . The basic types of engineering controls are : Process controls which involve changing the way a job activity or process is done to reduce the risk . Enclosure and / or isolation of emission source which keeps a selected hazard " physically " away from the worker and ventilation that strategically " adds " and " removes " air in the work environment . Ventilation can remove or dilute an air contaminant if designed properly . The design of a ventilation system must match the particular process and chemical or contaminant in use . Employers may need to use multiple types of controls to prevent employee overexposure .
Local exhaust ventilation usually required . If risk of overexposure exists , wear approved respirator . Correct fit is essential to obtain adequate protection . Supplied-air type respirator may be required in special circumstances . Correct fit is essential to ensure adequate protection . An approved self contained breathing apparatus ( SCBA ) may be required in some situations . Provide adequate ventilation in warehouse or closed storage area . Air contaminants generated in the workplace possess varying " escape " velocities which , in turn , determine the " capture velocities " of fresh circulating air required to effectively remove the contaminant .
Type of Contaminant : Air Speed :
Appropriate engineering controls solvent , vapours , degreasing etc ., evaporating from tank ( in still air ).
aerosols , fumes from pouring operations , intermittent container filling , low speed conveyer transfers , welding , spray drift , plating acid fumes , pickling ( released at low velocity into zone of active generation )
direct spray , spray painting in shallow booths , drum filling , conveyer loading , crusher dusts , gas discharge ( active generation into zone of rapid air motion )
grinding , abrasive blasting , tumbling , high speed wheel generated dusts ( released at high initial velocity into zone of very high rapid air motion ).
Within each range the appropriate value depends on :
0.25-0.5 m / s ( 50-100 f / min .)
0.5-1 m / s ( 100-200 f / min .)
1-2.5 m / s ( 200-500 f / min .)
2.5-10 m / s ( 500-2000 f / min .)
Lower end of the range
Upper end of the range 1 : Room air currents minimal or favourable to capture 1 : Disturbing room air currents 2 : Contaminants of low toxicity or of nuisance value only . 2 : Contaminants of high toxicity 3 : Intermittent , low production . 3 : High production , heavy use 4 : Large hood or large air mass in motion 4 : Small hood-local control only
Simple theory shows that air velocity falls rapidly with distance away from the opening of a simple extraction pipe . Velocity generally decreases with the square of distance from the extraction point ( in simple cases ). Therefore the air speed at the extraction point should be adjusted , accordingly , after reference to distance from the contaminating source . The air velocity at the extraction fan , for example , should be a minimum of 1-2 m / s ( 200-400 f / min ) for extraction of solvents generated in a tank 2 meters distant from the extraction point . Other mechanical considerations , producing performance deficits within the extraction apparatus , make it essential that theoretical air velocities are multiplied by factors of 10 or more when extraction systems are installed or used .
Personal protection
Eye and face protection
Skin protection
Hands / feet protection
No special equipment for minor exposure i . e . when handling small quantities .
OTHERWISE : Safety glasses with side shields . Contact lenses may pose a special hazard ; soft contact lenses may absorb and concentrate irritants . A written policy document , describing the wearing of lenses or restrictions on use , should be created for each workplace or task . This should include a review of lens absorption and adsorption for the class of chemicals in use and an account of injury experience . Medical and first-aid personnel should be trained in their removal and suitable equipment should be readily available . In the event of chemical exposure , begin eye irrigation immediately and remove contact lens as soon as practicable . Lens should be removed at the first signs of eye redness or irritation - lens should be removed in a clean environment only after workers have washed hands thoroughly . [ CDC NIOSH Current Intelligence Bulletin 59 ], [ AS / NZS 1336 or national equivalent ]
See Hand protection below
NOTE : The material may produce skin sensitisation in predisposed individuals . Care must be taken , when removing gloves and