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6.0 WORK REQUIREMENTS <br /> 6.1 Respiratory Protection <br /> Field operations will be initiated in Level D. The primary <br /> route of potential exposure for chemicals is inhalation. <br /> Inhalation hazards due to volatilization will be monitored <br /> using a photoionization detector to measure concentrations of <br /> volatile organic compounds (VOCs) in the breathing zone . If <br /> ambient air concentrations of VOCs in the breathing zone reach <br /> 25 ppm or greater, Sensidyne bran low-range benzene detector <br /> tubes (0 . 25 to 12 ppm, catalog number 121L with pump model <br /> 800) will be used to detect the presence of benzene . If <br /> benzene is detected, a temporary stop work will take place and <br /> the area will be ventilated and monitored until no benzene is <br /> detected in the breathing zone . f no benzene is detected, <br /> then half--facepiece air-purifying respirators will be worn by <br /> all personnel in the exclusion zone . <br /> Respirators must be kept available during site investigation <br /> activities . Respirators will be equipped with NIOSH-approved <br /> high efficiency particulate/organic vapor combination <br /> cartridges (such as North 7600) . <br /> 6.2 Dermal Protection <br /> # Unless adequate precautions are taken, chemicals may contact <br /> the skin or clothing. Potential physical contact with <br /> chemicals of concern are possible under the following <br /> circumstances : <br /> - installation of the three monitoring wells; and <br /> • sampling activities . <br /> 6.2 .1 Personal Protective Equipment <br /> ICES and contractor/subcontractor personnel will wear the <br /> following protective clothing onsite : <br /> • hard hats <br /> • steel-toed/steel--shank boots <br /> • inner and outer disposable PVC gloves <br /> • safety glasses <br /> • uncoated Tyvek coveralls (if the potential for splashing <br /> exists) <br /> 10 <br />