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• � fir/ � Miscellaneous tools and samplers will be dropped into a plastic pail, tub or other container. They will be brushed off and rinsed (outside, if possible) and transferred into a second pail to be carried to further decontamination stations, They will be washed with a trisodiutm phosphate or detergent solution, rinsed with acetone or methanol, rinsed with a trisodium phosphate or detergent solution and finally rinsed with clean water, 4.2, 1 Drilling Rig and Tools It is -possible that the drill rigs will be contaminated during test pit/borehole activities. They will be cleaned With high pressure water or portable high pressure steam followed by soap and water wash and rinse. Loose material Will be removed by brush. The person performing this activity will usually be at revel C protection. 4 .2, 2 Sample Containers Exterior surfaces of sample bottles will be decontaminated prior to packing for transportation to the analytical laboratorysample containers will be wiped clean and i placed in ndividual Zip-Loc bags at the sample site. It will be difficult to keep the sample containers completely clean. The samples will be taken to the decontamination area. Here they will be further cleaned if necessary and tranafeirea Lu a clean carrier and the sample identifies noted and cheoked off against the chain-of-custody record. The samples, now in a clean carrier, will be stored in a secure area prior to shipment, 4 .2. 3 Monitoring Equipment Monitoring equipment will be protected as much as possible from contamination by draping, masking or otherwise covering as much of the instruments as possible with Plastic without hindering the operation of the unit. The HNU meter, for example, can be placed in a clear plastic bag which allows reading of the scale and operation of the knobs. The HNU sensor can be partially wrapped, keeping the sensor tip and discharge port clear. 15