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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 rinse, or trisodium phosphate (TSP) wash and freshwater rinse, as <br /> appropriate. <br /> Drilling and sampling equipment were decontaminated as follows: <br /> ' 1. Drill rig 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 />