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Equipment that will not be damaged by water will be placed in wash tub containing an Alconox (or equivalent) solution and scrubbed with a brush or clean cloth. Equipment will be rinsed in a second wash tub. Equipment that may be damaged by water will be carefully clean using a sponge and detergent water, and wiped with r� d free deionized water. Care will be taken to prevent any equipment damage. • Rinse and detergent waters will be replaced between borings. Following decontamination, equipment will be la g on clean plastic sheeting to prevent contact with c ontam Hated soil.ren the equipment is not used immediately, the equipment will be c If or wrapped in plastic sheeting to minimize potential airborne contam- ination. 5.3 DRILLING AND HEAVY EQUIPMENT DECONTAMINATION PROCEDURES AMINATION Drilling equipment will be decontaminated bet ween each Decontamination will be done only at the decontamination area boring. desig- nated by the Project Leader. Augers will be scraped off as the are drawn from a borin container for disposal_ The cuttings will be placed in an ay ro with- drawn e P The following steps will be used to decontami- nate drilling and heavy equipment: • PersonneI will dress in suitable safety equipment to reduce per- sonal exposure. • Equipment heavily caked with soil and/or other material will be scraped off with a flat-bladed scraper. The scrapings will be dis- posed in drums. Drill cuttings will not be washed down the drain into the sewer system. Equipment that will not be damaged by water such as drill rigs, augers, drill bits, and shovels will be sprayed with detergent water by a high-pressure steamer, then rinsed with clear potable Care will be taken to adequately clean the insides f the Fater. stem augers. hollow- stem decontamination, drilling equipment will be placed on the clean drill rig and moved to a clean area immediately, it will be stored in the designated secure equipment a not used an area. 5-2