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4 <br /> . APPENDIX B <br /> DRILLING AND SAMPLING PROTOCOL <br /> 1. Bioremediation Drilling Application. <br /> Prior to conducting the drilling to prepare the bioremediation borings and wells, <br /> sample personnel will hand-auger, using a two-inch diameter auger, approximately <br /> 4 feet below the ground surface in an attempt to verify that no underground <br /> obstruction exists and to confirm soil types as well as soil permeabilities. <br /> Continuous flight hollow-stem augers will be used. The size of the borings will <br /> be 6 inches. The augers will be steam cleaned prior to the beginning of each <br /> boring and the rinse collected in portable approved tubs. The rinse water will <br /> be collected from the tubs into DOT 17-H 55 gallon drums and stored on the <br /> Cheaper! #37 Facility site in an area inaccessible to the public until <br /> verification that soil samples are below PHS-EHD and CWQCB standards. Should the <br /> rinse water exceed PHS-EHD and CWQCB standards, it will be bioremediated in the <br /> drums. Auger soil cuttings will be collected on impermeable membranes of <br /> acceptable quality, properly contained, and pile remediated at the Cheaper ! #37 <br /> Facility property. The pile bioremediation would be conducted similar to the in- <br /> situ portion of the project with one change . A solid pipe would be attached to <br /> the placement hosing. Then product would be lanced into the pile on a three-foot <br /> grid pattern, being sure not to pierce the bottom. <br /> i <br /> 2. Sample Collection. <br /> Soil samples shall be collected prior to the bioremediation application from <br /> borings/wells at the center of the contaminant plume in order to record .4 <br /> preliminary analyses to be used as baseline soils data to compare with <br /> confirmation borings/wells samples to form conclusions. These center samples will <br /> be used as a baseline for the levels of contamination. The number of <br /> borings/wells to be samples are six. The number of samples that will be retrieved <br /> from each boring/well will be determined by field monitoring of soil sampled <br /> utilizing a photoionization detector. Borings #22-49 will be samples in the ' <br /> center of the plume and borings #' s 4-28 on the edge. Additional samples will <br /> be obtained during the bioremediation drilling process from these borings. <br /> Additional soil samples means that soil sampling will be an ongoing process to <br /> test for contamination levels. Additional soil sampling will be taken both in <br /> the interim phase and drilling phase and means PID sampling and laboratory <br /> analysis. <br /> Soil sampling will be collected with a modified California split spoon sampler ' <br /> equipped with 6-inch long brass or stainless steel liners and with zero 1 <br /> headspace. The sampler will be driven eighteen (18) inches into undisturbed soil <br /> beyond the tip of the auger using a 140 pound hammer having a 30-inch drop. After <br /> the soil sample is collected, the sample tube from the bottom of the sampler will <br /> be immediately sealed in the field by placing Teflon covers over the open ends <br /> of the tube and capped securely with a polyethylene lid over the Teflon covers. <br /> An adhesive tape will be placed around the plastic caps to ensure that the caps <br /> are secured and an airtight seal is maintained. They will be labeled properly <br /> in the field to identify boring number, depth, date, time, ,job, and field <br /> identification number. Sample identification will correlate between all <br /> 102 <br /> J <br />