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STANdAI(D OPERATING PROCEDURES <br /> SOP NO. 005, REVISION 0 <br /> COLLECTION OF HYDROPUNCH* SAMPLES <br /> PAGE 2 OF 3 <br /> • Secure the rods and unscrew the top drill rod. This is done so that a water level <br /> indicator probe can be lowered down inside the drill rods to monitor the water level <br /> inside the rods and to prevent the body of the tool from sliding down over the exposed <br /> screen. <br /> • Disconnect the drive casing from the hammer (or push adapter) and check to see if the <br /> tool is filling, <br /> • When an adequate volume of water has filled the tool, lower a small diameter bailer <br /> through the drive casing to collect the sample. <br /> • The sample bottles are filled in order of decreasing analyte volatility. Samples will be <br /> maintained at a temperature of 4° Celsius from the time of collection until arrival at the <br /> laboratory. Samples will be recorded in the logbook and on chain-of-custody forms <br /> with sampling date and time, preservatives used, requested analyses, and the <br /> samplers' initials. <br /> • After chemical samples have been collected, a water sample will be collected for pH, <br /> temperature, and conductivity readings. <br /> • After completing sample collection, pull the drive casing and the Hydropunche to the <br /> surface. The cone and screen will normally stay downhole. Should the screen be <br /> recovered, do not attempt to reuse it. <br /> • Disposable sampling equipment will be discarded. The drilling equipment will be <br /> steam-cleaned between borings and the Hydropunche and discharge device assembly <br /> will be decontaminated by using an Alconox wash, followed by a double tap water <br /> rinse and distilled water rinse. <br /> • All other procedures regarding the assembly, placement, removal, disassembly, and <br /> decontamination of the Hydropunche are identical to the usage with auger drilling. <br /> 5.3 MAINTENANCE <br /> Not applicable. <br /> 5.4 PRECAUTIONS <br /> • The operator should be aware that heaved sands inside the augers can create <br /> resistance to pushing or driving the Hydropunch®to the required sample depth or may <br /> sandlock the Hydropunche inside the augers during removal of the tool from the <br /> borehole. <br /> • When lowering the Hydropunche into the borehole, if a sudden jerk or slip of the <br /> sandline occurs during the descent of the Hydropunche , the Hydropunche should be <br /> removed from the borehole to see that the screen did not prematurely open thereby <br /> contaminating the unit and necessitating disassembly and decontamination of the unit <br /> before continuing. <br /> .oma <br /> oz/o3M4 <br />