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Water Sampling Protocol : The equipment used to withdraw water from the well will be 2 PVC bailers. One bailer will be used to purge the well and the other will be used to withdraw the sample. At the samplers option, he may purge the well with an electric pump. However, the actual water samples must be withdrawn with a clean bailer. All equipment including the bailers, bailing cord, water depth measuring devise and the pump and electric lines and hose must be decontaminated prior to entering any well . They will be decontaminated by washing with Tri-sodium phosphate detergent and water and thoroughly rinsing them with clean water. The depth to groundwater will be measured from the highest point on the top of the casing to the surface of the water table. The devise used will be an electric conductivity devise which trips a red light and a buzzer when the probe touches water. A minimum of three measurements will be made at each well , the final reading will be noted after 2 or more readings do not vary by more than 0 .01 feet. The total depth of the well will also be measured. This information along with water parameters mentioned later will be entered onto the sampling sheet, a copy of which is attached. The well volume will be calculated according to the formula supplied. The presence of floating free product will be checked by noting the depth of the water and marking that level on the probe wire. The probe and wire will be withdrawn from the well and dried. Liquid paste or chalk will be placed on the probe and up the side of the wire for 2 feet (could be higher depending on the depth of the plume) . The probe is then carefully lowered into the well so that the probe 3ust touches and records the water table, care is taken not to lower the probe below the water table. Once the probe has signaled the water table the probe is withdrawn quickly from the well and the liquid level above the water level point on the probe is measured. This liquid is the floating product and will be recorded on the sampling sheet. a Water samples will be obtained as follows: A) First, one full well volume of water will be withdrawn from the well; B) The parameters of pH, conductivity or resistivity, and temperature will be measured. The color, odor and presence of a sheen of the bailed water will be noted; C) A 2nd and 3rd well volume of water will be withdrawn and the parameters remeasured, if the results vary by more than 10% then step C is repeated; D) The well will be allowed to recover to 80% of its original volume or 2 hours have passed then a sample will be withdrawn and placed in a 40 ml vial supplied by Sherwood Laboratories of 1