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Cl <br />0 ANNEX A <br />PERSONNEL EQUIPMENT REQUIRED: <br />a. Personnel working in such tanks will wear rubber boots, fresh <br />air masks, life lines, and clean clothing with no metal buttons <br />or fittings. A copper rivet will be driven into the heels of <br />rubber boots to provide a ground or discharge of static <br />electricity which may accumulate on personnel wearing safety <br />equipment. <br />b. Fresh air will be supplied to the mask though a hose with a <br />positive displacement air blower to the windward side of manhole <br />in tank. Adequate power operated blowers are responsible for the <br />air supply until personnel wearing mask have left the tank and <br />removed face piece. Securely attach one end being held by an <br />attendant stationed on the tank to assist in his removal, if <br />necessary. <br />EQUIPMENT REQUIREMENTS: <br />a. Canister type masks will not be used in lieu of masks <br />equipped with hose supplying fresh air. <br />b. Use non-ferrous tools for cleaning surfaces of rust, <br />sediment, etc. <br />c. Use only cotton cloths for cleaning purposes. Other cloths <br />tend to generate static electricity. <br />d. Lights of approved explosion -proof type only will be used. <br />e. Discontunue cleaning operations while electric storm is <br />threatening or in progress. <br />f. Personnel on this operation are prohibited from wearing wool, <br />nylon, silk, rayon, and/or other static producing material. <br />Cotton cloth is the only recommended type of clothing. <br />E <br />