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KLE/NFELOER (�H e a l t h& Safety Procedure HSP-5-09 Version 10 COLD STRESS Number: Number: Published 5/4/2018 Revised N/A Date: Date: • Clothing should be kept clean since dirt fills air cells in fibers of clothing and destroys its insulating ability. • Clothing must be dry. Moisture should be kept off clothes by removing snow prior to entering heated shelters. While the worker is resting in a heated area, perspiration should be allowed to escape by opening the neck, waist, sleeves and ankle fasteners or by removing outerwear. If the rest area is warm enough it is preferable to take off the outer layer(s) so that the perspiration can evaporate from the clothing. • If fine manual dexterity is not required, gloves should be used below 4°C for light work and below -7°C for moderate work. For work below-17°C, mittens should be used. • Cotton is not recommended. It tends to get damp or wet quickly, and loses its insulating properties. Wool and synthetic fibers, on the other hand, do retain heat when wet. 5-09.6.3.2 Head A wool knit cap provides the best head protection. When a hard hat is worn, a liner should be used. 5-09.6.3.3 Hands Mittens are more efficient insulators than gloves and are recommended whenever possible. Mittens can also be worn over gloves for extra warmth. 5-09.6.3.4 Feet Appropriate footwear should be worn at all times when working in cold environments. • Recommended foot protection practices include: If work involves standing in water or slush waterproof boots must be worn. While these protect the feet from getting wet from cold water in the work environment, they also prevent the perspiration to escape. The insulating materials and socks will become wet more quickly than when wearing leather boots and increase the risk for frostbite. • Lapping pants over boot tops to keep out snow or water. For heavy work, a felt lined, rubber bottomed, leather-topped boot with a removable felt insole is preferred. Boots should be waterproof and socks changed when they become sweat or water soaked. Copyright 2019 Kleinfelder, Inc. Page 9 of 11 Important: When modifying this document, update properties with your name, date, and nature of changes made.