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..aop.w...xv...41.�. <br /> 6. Field Methods and Procedures <br /> 6.4 Groundwater Sampling Procedures <br /> After the collection of soil and soil gas samples, a direct-push drilling rig will be advanced to <br /> groundwater. A temporary 1-inch polyvinyl chloride screen will be placed in the boring, and <br /> groundwater samples will be collected using a disposal bailer and placed into new precleaned, <br /> certified sampling containers. Water samples will be placed in coolers and chilled with ice to <br /> 4°C for storage and shipping to the analytical laboratory. <br /> Duplicate groundwater samples will be collected in the same manner and two sets of sample <br /> containers will be filled. Groundwater samples will be collected in accordance with the following <br /> standard operating procedures contained in Appendix D of the TBA SAP: <br /> • Ecology and Environment,Inc. SOP#ENV 3.3: Borehole Sampling <br /> • Ecology and Environment, Inc. SON ENV 3.6: Groundwater Sampling Devices <br /> When sampling is completed, each borehole will be tremie grouted through the temporary well <br /> screen with neat cement and finished at the ground surface to match surrounding materials. <br /> 6.5 Decontamination Procedures <br /> The decontamination procedures used for this TBA are presented in the TBA SAP. <br /> 00002693.1501.OIBR 6-2 <br /> EI C.wilio No.2 <br />