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A-3 <br /> • Specific conductance ±10 percent of the reading range <br /> • PH ±0 1 pH unit <br /> • Temperature ±0 5° C <br /> After stabilization, and after at least three well volumes were evacuated, a sample was collected <br /> for analysis The field container used for well stabilization measurements, and the pH, <br /> temperature, and conductivity probes were rinsed between wells with deionized water <br /> All purge water was containerized and properly handled and documented for disposal If the <br /> containers was stored on site, a label specifying the date of purging, source, and the known or <br /> suspected nature of the contents was affixed to each container <br /> 2.3 Sample Collection, Preservation, and Handling <br /> After purging, a new polyethylene disposable bailer was used to collect samples for analysis <br /> The bailer was 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 were filled <br /> completely so no airspace remained in the vial after sealing <br /> All sample containers were 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 were used <br /> 3.0 DECONTAMINATION AND DISPOSAL PROCEDURES <br /> 3.1 Equipment Decontamination <br /> All equipment that came in contact with potentially contaminated soil, drilling fluid, air, or <br /> water was decontaminated before each use Decontamination consisted of steam-cleaning, a <br /> high-pressure, hot-water nnse, or trisodium phosphate (TSP) wash and freshwater rinse, as <br /> appropriate <br /> Drilling and sampling equipment were decontaminated as follows <br /> 1 Drill ng augers, drill rods, and drill bits were steam-cleaned prior to use and between <br /> borings Visible soil, grease, and other impurities were removed <br /> 2 Soil sampling equipment was steam-cleaned prior to use and between each boring <br /> Prior to individual sample collection, any sampling device was cleaned in a TSP <br /> • solution and rinsed twice in clean water Any visible soil residue was removed <br /> 3 Water sampling containers were cleaned and prepared by the respective analytical <br /> laboratories <br />