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Appendix <br /> Drilling and Sampling Procedures <br /> The procedures that will be used for drilling the boring and collecting soil samples are presented <br /> below. <br /> F Drilling and Soil Sampling Procedures <br /> A 9 <br /> • Up to four soil borings will be advanced using direct-push sampling equipment. <br /> Three borings (B-2 through B-4) will be advanced to approximately 7.6 meters <br /> (25 feet) below ground surface (BGS), One boring (B-1) will be advanced to <br /> + approximately 12.2 meters (40 feet) BGS. <br /> Soil samples will be collected at 1.5-meler(5-foot) intervals. Soil samples will be <br /> collected using a 5-centimeter(2-inch) diameter sampler lined with a 1.3-meter <br /> (4-foot) long acetate sleeve. <br /> • Borings will be backfilled with bentonite cement grout from the bottom of the <br /> borehole to ground surface. <br /> i <br /> • The ground surface will be repaired with cold patch asphalt or concrete, where j <br /> applicable. ! <br /> • The drilling and sampling equipment wi 1 be washed in a detergent rinse,two <br /> w clear water rinses, and a final deionized/fistilled water rinse prior to drilling. <br /> Soil and wastewater generated during th field activities will be contained in <br /> 208-liter(55-gallon)United Nations approved drums. <br /> Groundwater Sampling Procedures <br /> • Field activities and equipment utilization Will be recorded on field report forms. <br /> • A groundwater sample will be collected om each boring. <br /> I. , <br /> Groundwater samples will be collected from either well casing inserted into each <br /> boring or HydroPunch-type groundwaterzmpling equipment. The well casing <br /> will consist of 2.5-centimeter (1-inch) di eter, Schedule 40, flush-threaded, <br /> 0.05-centimeter (0.020-inch), machine-slotted polyvinyl chloride (PVC) well <br /> screen. If free product is encountered, product thickness will be verified using a <br /> disposable bailer. Up to three methods may be used for groundwater collection and <br /> these include the following. i. <br /> I <br /> — Dedicated Teflon tubing with a single-ball, stainless steel check valve; or <br /> A new disposable polyethylene or Teflon bailer, or stainless steel bailer; or <br /> — A peristaltic pump and new dedicated Teflon tubing. <br /> 41,UCRFPi1COWOMsnDR2OOaPR APJM1835444.2ab.Qoc <br /> A-1 <br />