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temperature, and conductivity parameters to ensure that <br /> formation water has entered the well casing. <br /> Ground water samples will be collected by lowering a clean <br /> 2-inch diameter, bottom-fill Teflon bailer to just below the <br /> water level in the well. Samples will be carefully <br /> transferred from the check-valve equipped Teflon bailer to <br /> zero-headspace 1-liter and 40-milliliter glass containers <br /> fitted with Teflon-sealed caps. All 40-milliliter samples <br /> will be inverted to ensure that entrapped air is not present. <br /> Each sample will be labeled with sample number, well number, <br /> sample date, and sampler's initials. The samples will remain <br /> on ice until they are analyzed at the laboratory. <br /> Each well will be surveyed from a permanent reference mark at <br /> the top of each well casing to 0. 01 foot accuracy to a common <br /> datum or an established benchmark with respect to location and <br /> elevation by a licensed surveyor. <br /> All soil and fluids generated during the drilling, <br /> development, and purging activities will to be temporarily <br /> stored onsite in appropriate containers pending results of <br /> laboratory analysis. Each container used for fluid disposal <br /> will be clearly labeled. Soil and ground water will be <br /> disposed of at an appropriate waste facility upon receipt of <br /> laboratory results. <br />