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'I <br /> A-4 <br /> 3.0 DECONTAMINATION AND DISPOSAL PROCEDURES <br /> Ie <br /> 3.1 Equipment Decontamination <br /> All equipment that comes in contact with potentially contaminated soil, drilling fluid, air, or <br /> water will be decontaminated before each use. Decontamination will consist of steam-cleaning, <br /> a high-pressure, hot-water rinse, or trisodium phosphate (TSP) wash and freshwater rinse, as <br /> appropriate. <br /> Drilling and sampling equipment will be decontaminated as follows: <br /> I <br /> 1. Drill rig augers, drill rods, and drill bits will be steam-cleaned prior to use and <br /> between borings. Visible soil, grease, and other impurities will be removed. <br /> 2. Soil sampling equipment will be steam-cleaned prior to u1se and between <br /> each boring. <br /> Prior to individual sample collection, any sampling device will also be cleaned in a <br /> TSP solution and rinsed twice in clean water. #Any visible soil residue will be <br /> removed. I <br /> 3. It is anticipated that disposable equipment will be used to collect water samples. if <br /> disposable equipment is not used, water sampling equipment will be decontaminated <br /> using methods described in Item 2 above for soil sampling equipment. <br /> 4. Water sampling containers will be cleaned and prepared Cby the respective analytical <br /> laboratories. f <br /> I � <br /> II' 5. Stainless steel or r <br /> I <br /> b ass soil sampling tubes will be steam-cleaned or washed in TSP <br /> solution and rinsed with clean water. it <br /> b. Field monitoring equipment (PH conductivity, or temperature probes) will be rinsed <br /> with clean water prior to use and between samples.! <br /> 4.0 FIELD MEASUREMENTS <br /> i <br /> Field data will be collected during various sampling and monitoring activities; this section <br /> describes routine procedures to be followed by personnel performing field measurements. The <br /> methods presented below are intended to ensure that field imeasuiements are consistent and <br /> reproducible when performed by various individuals. <br /> II LRProoa.MAF <br /> k <br /> I� <br />