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WNAGERS OESCNEp40QVSLtTANiS i <br /> 5 feet above the water table A sand pack (Lonestar 1 C or equivalent) will be placed from the . <br /> bottom of the bore hole to approximately 2 feet above the top of the screen. A 2- to 3-foot <br /> bentonite seal will placed above the sand pack. After the bentonite seal has hydrated, the <br /> remaining annular space will be grouted to the surface with a bentonite/cement grout A traffic <br /> Sande flu$h i fount utility bvx will bi. in�laileu oi�er t,le lllollltol Well A imking water tignt cap <br /> will be installed on the monitor well <br /> The monitor well will be developed by pumping the well until the water is free of sediment or <br /> five well casing volumes have been removed Prior to pumping, any sediment present in the <br /> bottom of the well will be removed with a bailer The top-of-casing elevation will be surveyed <br /> relative to other wells at the site <br /> 2.3 Groundwater Sampling Procedures <br /> Two rounds of groundwater samples will be collected from monitor well MW-5 at an interval <br /> of approximately 30 days. Prior to each sampling event a complete round of water levels will <br /> be collected The well will be purged of three to five casing volumes with either a Teflon' <br /> bailer or a submersible pump prior to sampling During purging, the pH, temperature, and <br /> electrical conductivity of the groundwater will be measured The groundwater sample will be <br /> collected using a clean nylon line and Teflon'' bailer The groundwater sample will be placed <br /> in the appropriate sample container (see Section 3 3 1) Care will be taken to prevent air <br /> bubbles from forming in the 40 ml sample containers to be submitted for volatile analysis The <br /> sample will be sealed in a plastic bag and stored on ice at temperature of approximately 4°C for <br /> transport to the analytical laboratory A thermometer will be kept in the cooler with the <br /> samples <br /> 2.4 Analytical Methods <br /> Soil and groundwater samples will be analyzed with a two week turnaround time by a State of <br /> California certified analytical laboratory <br /> 2.4.1 Soil Analysis <br /> Soil samples will be analyzed for <br /> • Total Petroleum Hydrocarbons as Gasoline (TPH-G, EPA M8015) <br /> • Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX, EPA 8020) . <br /> L �&MoRIajceeL-p 4 <br />