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7.1 LIMITATIONS OF PROTECTIVE CLOTHING <br /> The protective equipment ensembles selected for this project are <br /> anticipated to provide protection against the types and <br /> g i yp concentrations of <br /> hazardous materials that may potentially be encountered during field operations. <br /> However, no protective garment, glove or boot is resistant to all chemicals at <br /> i any concentration; in fact, chemicals may continue to permeate or degrade a <br /> garment even after the source of contamination is removed. <br /> In order to obtain optimum usage from PPE, ''the following procedures are to <br /> be followed by all Dames & Moore personnel: <br /> o When using disposable coveralls, don a clean, new garment after each rest <br /> break or at the beginning of each shift; <br /> ro Inspect all clothing, gloves and boots both prior to and during use for: <br /> �r <br /> - Imperfect seams <br /> Non-uniform coatings <br /> - Tears <br /> - Poorly functioning closures <br /> o Inspect reusable garments, boots and gloves both prior to and during use <br /> for: <br /> - Visible signs of chemical permeation such as swelling, discoloration, <br /> stiffness or brittleness <br /> Cracks or any signs of puncture or abrasion ' <br /> { <br /> Any reusable garments exhibiting any such ''characteristics will be <br /> i <br /> discarded. <br /> 7.2 DURATION OF WORK TASKS <br /> i <br /> The duration of work tasks in which personnel use PPE ensembles that <br /> include chemical protective clothing (including uncoated Tyvek) will be <br /> established by the SSO. Variables to be considered include ambient temperature <br /> and other weather conditions, the capacity of individual personnel to work in the <br /> required level of PPE in heat and cold, and the limitations of specific PPE <br /> ensembles. The minimum rest breaks are as follows: } <br /> CHEVMERC.H50 20 <br /> i „ <br />