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a <br /> Dates and times of collection <br /> Purpose of sample ; <br /> Sample distribution (e.g. , laboratory, archive, etc. ) <br /> Field observations <br /> ' - Field measurements (e.g. , PID readings, pH, <br /> conductivity, water levels) . <br /> ' -- other data records (e.g. development log, soil sampling <br /> report, well log, etc. ) <br /> ' All drilling equipment, pipe, and materials coming in <br /> contact with the borehole material will be decontaminated <br /> before use according to the procedures described in Section <br /> ' 6.0. All sampling equipment will be decontaminated prior to <br /> sampling following these same procedures. <br /> ' Soil samples will be collected as monitoring well drilling <br /> progresses. All downhole drilling equipment will be <br /> decontaminated prior to use and between use for each well <br /> ' according to the procedures described in Section 4.0. <br /> All well construction material, including well casing, <br /> screen, and well caps, will be decontaminated prior to <br /> installation by steam cleaning according to the procedures <br /> described in Section 4. 0. <br /> ' To prevent the transfer of surface contamination to a well, <br /> a Portland cement and bentonite surface seal will be <br /> installed in conformance with regulatory requirements. The <br /> casing will be fitted with a water tight locking cap. No <br /> ' solvent or glue will be used in well construction. The <br /> wellhead will be contained below grade in a water-tight_ <br /> traffic rated box or otherwise protected from damage. <br /> ' In order to assure that groundwater samples are obtained <br /> from formation material and not from the filter pack, wells <br /> ' will be purged in accordance with the appended <br /> Well Development Protocol. <br /> Samples will be placed in laboratory prepared containers, <br /> appropriate for the analyses specified as indicated on Table <br /> 1. <br /> ' Amber glass and polyethylene bottles will be filled to the <br /> bottle neck. Samples collected in 40-m1 VOA vials will be <br /> filled to overflowing with a positive meniscus. The vials <br /> will be sealed with a teflon-lined screw cap such that no <br /> head space exists within the vial. <br />