<Li> Personal protective equipment </Li> <P> Eliminating the hazard--physically removing it--is the most effective hazard control . For example, if employees must work high above the ground, the hazard can be eliminated by moving the piece they are working on to ground level to eliminate the need to work at heights . </P> <P> Substitution, the second most effective hazard control, involves replacing something that produces a hazard (similar to elimination) with something that does not produce a hazard--for example, replacing lead - based paint with titanium white . To be an effective control, the new product must not produce another hazard . Because airborne dust can be hazardous, if a product can be purchased with a larger particle size, the smaller product may effectively be substituted with the larger product . </P> <P> The third most effective means of controlling hazards is engineered controls . These do not eliminate hazards, but rather isolate people from hazards . Capital costs of engineered controls tend to be higher than less effective controls in the hierarchy, however they may reduce future costs . For example, a crew might build a work platform rather than purchase, replace, and maintain fall arrest equipment . "Enclosure and isolation" creates a physical barrier between personnel and hazards, such as using remotely controlled equipment . Fume hoods can remove airborne contaminants as a means of engineered control . </P>

In the hierarchy of risk controls which is the most preferred