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ism., <br /> Harding Lawson Assoclatos <br /> APPENDIX B <br /> DRILLING AND SAMPLING METHODOLOGY <br /> Soil borings were advanced using truck-mounted, 8-inch- <br /> diameter, hollow-stem auger drilling equipment, and sampled using <br /> a 2-1/2 inch (inside diameter) , Sprague & Henwood (S&H) , split- <br /> barrel sampler lined with 6-inch-long stainless steel tubes. <br /> Drilling was performed under the direction of an HLA geologist, <br /> who logged the borings in accordance with the Unified Soil <br /> Classification System. <br /> All soil samples were screened in the field with a <br /> photoionization detector (PID) . The PID detects the presence of <br /> some organic compounds. PID readings obtained are listed on the <br /> boring logs. All soil samples retained for chemical analysis <br /> were sealed with aluminum foil, plastic end caps, teflon, and <br /> F <br /> electrical tape and stored in a cooled ice chest until delivery <br /> to a state-certified laboratory under chain-of custody- <br /> .: procedures. <br /> Soil iiampling equipment was cleaned with an Alconox and <br /> water solution and rinsed with deionized water between sampling <br /> intervals. Drilling augers were steam cleaned between borings. <br /> Soil cuttings generated during drilling were stored on and <br /> covered with plastic sheeting pending analytical results. <br /> The groundwater monitoring wells were constructed using 2- <br /> inch-diameter, Schedule 40, FVC casing with flush-mounted, <br /> threaded joints. The wells consisted of 15 feet of slotted <br /> casing (0.02-inch slot widths) installed at the bottom of the <br /> 032481P/R67 B 1 <br />