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Water Sampling Protocol - <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 At the samplers <br /> option, he may purge the well with an electric pump However, <br /> the actual water samples must be withdrawn with a clean bailer <br /> All equipment including the bailers, and bailing cord, the <br /> water depth measuring devise and the pump and electric lines <br /> and hose must be decontaminated prior to entering any well. <br /> They will be decontaminated by washing with Tri--sodium <br /> phosphate detergent and water and thoroughly rinsing them with <br /> clean water <br /> The depth to groundwater will be measured from the highest point <br /> on the top of the casing to the surface of the water table The <br /> devise used will be an electric conductivity devise which trips <br /> a red light and a buzzer when the probe touches water A <br /> minimum of three measurements will be made at each well, the <br /> final reading will be noted after 2 or more readings do not <br /> vary by more than 0 01 feet The total depth of the well will <br /> be measured also This information along with water parameters <br /> mentioned later will be entered onto the sampling sheet a copy <br /> of which is attached The well volume will be calculated <br /> according to the formula supplied <br /> The presence of floating free product will be checked by noting <br /> the depth of the water and marking that level on the probe <br /> wire The probe and wire will be withdrawn from the well and <br /> dried Liquid paste or chalk will be placed on the probe and <br /> up the side of the wire for 2 feet (could be higher depending <br /> on the depth of the plume) The probe is then carefully <br /> lowered into the well so that the probe gust touched the <br /> records the water table, care is taken not to lower the probe <br /> below the water table Once the probe has signaled the water <br /> table the probe is withdrawn quickly from the well and the <br /> liquid level above the water level point on the probe is <br /> measured This liquid is the floating product and will be <br /> recorded on the sampling sheet <br /> Water samples will be obtained as follows <br /> A) First one full well volume of water will be withdrawn from <br /> the well , <br /> B) The parameters of pH, Conductivity or resistivity, and <br /> Temperature will be measured The color, odor and presence of <br /> a sheen of the bailed water will be noted, <br /> C) A 2nd and 3rd well volume of water will be withdrawn and the <br /> parameters remeasured, if the results vary by more than 10% then <br /> step C is repeated, <br /> 00 <br />