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i <br /> A-3 j <br /> s <br /> • Specific conductance ±10 percent of the reading range <br /> • pH ±0.1 pH unit <br /> • Temperature +0.50 C <br /> After stabilization, and after at least three well volumes are evacuated, a sample will be collected <br /> for analysis The field container used for well stabilization measurements, and the pH, <br /> temperature, and conductivity probes will be rinsed between wells with deionized water <br /> All purge water will be containerized and properly handled and documented for disposal If the <br /> containers are stored on site, a label specifying the date of purging, source, and the known or <br /> suspected nature of the contents will be affixed to each container <br /> 2.3 Sample Collection, Preservation, and Handling <br /> After purging, a new polyethylene disposable bailer will be used to collect samples for analysis <br /> The bailer is attached to a new disposable rope and lowered slowly into the water to avoid <br /> agitation of the collected sample Containers for volatile organics analyses will be filled <br /> completely so that no airspace remains in the vial after sealing <br /> . All sample containers will be prewashed and prepared at the analyzing laboratory in accordance <br /> with quality assurance/quality control protocols of the laboratory Only sample containers <br /> appropriate for the intended analyses will be used <br /> 3.0 DECONTAMINATION AND DISPOSAL PROCEDURES <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 nnse, or tnsodium phosphate (TSP) wash and freshwater nnse, as <br /> appropriate <br /> Dnlling and sampling equipment will be decontaminated as follows <br /> 1 Drill ng 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 use and between 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 <br />