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d. Confined Space Entry NO1'WOUIRED FOR THIS PROJECT "W <br /> A confined space entry must be approved by Tait Environmental Systems Company Safety Officer. <br /> Contaminated soil excavations may pose additional hazards such as air contamination, flammable or <br /> explosive atmosphere, and oxygen deficiency. Entry into trenches and excavations meets the definition of a <br /> confined space.All confined space entries shall be in accordance with the following procedures. <br /> No site workers will enter the tank,or an excavation over 5 feet in depth. Should it become necessary to <br /> enter tank a confined space entry permit will be obtained from the Company Safety Officer prior to the <br /> entry of any worker into a confined space, and the standard operating procedure (SOP) for confined space <br /> entry shall be followed. <br /> - Ensure that all pipes entering into the confined space have been disconnected and sealed. <br /> - Remove any liquids or sludges from the confined space. <br /> - Ventilate the confined space with fresh air. The ventilation mechanism should be explosion <br /> proof. <br /> - Test the atmosphere of the confined space with a oxygen/combustible meter. The oxygen <br /> content of the space must be between 19.5 and 22.0% and the LEL indication below 10% <br /> before personnel can enter the confined space. <br /> - Monitor the concentration of Benzene, Toluene, Xylene, and Ethel Benzene in the space. If <br /> the concentration of Benzene exceeds .005 ppm, or any other the other vapors exceed 100 <br /> ppm,do not enter the space. <br /> - Personnel entry into any excavation five feet deep or greater is only permitted if the walls are <br /> properly shared or sloped. A ladder shall be provided and placed at an angle not more than <br /> 30 degrees from vertical, and secured as necessary. Ladder side rails shall extend at least <br /> three feet above the ground surface. <br /> Install extraction devices over the confined space. <br /> Provide a stand-by person for the confined space entry. <br /> Hold a pre-entry meeting to discuss the work task, on-site communications, and emergency <br /> procedures. <br /> Monitoring of the confined space shall be on-going throughout the entry. <br /> D-5 <br /> RECEIVED FEB-11-04 15:09 FROM-9168581011 TO-KLEEMAN ROEBBELEN PAGE 25 <br />