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A=COM • Chemical-resistant outer gloves taped to outer coveralls;' • Chemical-resistant inner gloves; and' • Chemical-resistant safety-toe boots(taped to outer coveralls). 4.5.4 Level C Ensemble The Level C ensemble provides moderate skin protection against contact with hazardous substances and moderate respiratory protection. Its use is appropriate where there is the potential for skin contact with known hazardous substances and health hazards,together with a limited and well-defined potential for exposure via inhalation. Level C Equipment List: • Full-face air-purifying respirator(APR)equipped with cartridge types as designated in the project SH&E PLAN;2 • Plaind (uncoated)disposable coveralls; • Chemical-resistant disposable outer coveralls; • Chemical-resistant outer gloves taped to outer coveralls;3 • Chemical-resistant inner gloves; • Hard hat; • Safety-toe boots taped to coveralls;the use of boot covers(e.g., booties)or chemical-resistant boots may be specified; and • Hearing protection (as required). 4.5.5 Level B Ensemble The Level B ensemble provides both the highest level of inhalation exposure protection and considerable skin contact protection. Its use is appropriate where there are significant known or suspected hazardous substances and health hazards, involving both skin and inhalation exposure (up to and including Immediately Dangerous to Life or Health [IDLH] conditions)or where adverse atmospheric conditions cannot be mitigated by use of air purifying respirators(e.g. oxygen deficient atmospheres or chemicals with poor warning properties).The use of Level B PPE requires prior approval by the SH&E Manager. Level B Equipment List: • Supplied air respirator(SCBA or airline system with Grade D or better breathing air); • Chemical-resistant disposable outer coveralls; • Chemical-resistant outer glove taped to outer coveralls;3 • Chemical-resistant inner gloves;3 • Hard hat; • Chemical resistant safety-toe boots taped to coveralls; and • Hearing protection (as required). 1 Selection of specific glove types/materials will be provided in the project SH&E Plan based on consideration of the contaminants and the physical conditions of the work. 2 Selection of specific cartridges will be made by the SH&E Department(or Competent Person—Respiratory Protection as designated by the SH&E manager)based on contaminants present.A cartridge change-out frequency will also be specified in the SH&E based on the manufacturer's cartridge performance data. 3 Selection of specific glove types/materials will be provided in the project SH&E based on consideration of the contaminants and the physical conditions of the work. Hazardous Waste Operations(S3AM-117-PR1) Revision 3 July31,2019 PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 11 of 21