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.a <br /> bridging fines within the slots and sand pack. This will be <br /> done by surging using the well water if possible, if not then <br /> �.. only potable water may be used. A log of the amount of <br /> introduced water will be kept and its use will be kept to a <br /> minimum. Bailing and surging will continue until the water does <br /> not contain any fine silt and or clay. <br /> All purged water will be stored in drums, the drums will be <br /> sealed and left on site until the condition of the water is <br /> assessed. <br /> Sampling Protocol : <br /> Soil <br /> Core samples will be taken every 5 feet for the entire depth of <br /> the well. Every effort will be made to obtain a core sample <br /> within the capillary fringe. The blow counts for the samples <br /> will be logged. <br /> Soil samples will be obtained from the core samples taken every <br /> 5 feet during drilling. A split spoon sampler with brass <br /> sleeves will be used. The samples will remain within the brass <br /> sleeve covered with aluminum foil, and capped with the plastic <br /> caps which are supplied with the sleeves. The plastic cap will <br /> be taped to the brass sleeve using duct tape so that an air <br /> tight seal is obtained. Samples will be marked and placed in a <br /> cooler of ice until they are turned over to the laboratory, <br /> which should be within 48 hours of the drilling. A Chain of <br /> Custody will be filled out by the sampler. <br /> The split spoon sampler and the brass sleeves will be <br /> decontaminated before each sampling event. They will be washed <br /> with Tri-sodium phosphate detergent and water and rinsed <br /> thoroughly with clean water. <br /> Core samples will be measured with a OVA meter and the readings <br /> will be recorded on the drill log. These readings will be used <br /> to help select the cores to be sent for laboratory analysis. <br /> A minimum of three core samples will be sent for analysis. One <br /> of these samples will be from the capillary fringe. Also, if <br /> possible, one sample will be sent which is thought to be free of <br /> contaminant and one that is thought to be contaminated. One <br /> sample will be sent for at least every 15 feet of drilled hole <br /> above the water table. If the water table is at 10 feet or less <br /> then only 2 samples will be taken and analyzed. <br /> Water <br /> The equipment used to withdraw water from the well will be 2 PVC <br /> bailers. One bailer will be used to purge the well and the <br /> other will be used to withdraw the sample. All equipment <br /> including the bailers, and bailing cord, and the water depth <br /> '�- measuring devise must be decontaminated prior to entering any <br /> well. They will be decontaminated by washing with detergent and <br /> water and thoroughly rinsing them with clean water. <br />