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i ' APPENDIX C SECTION I BORING METHODS ' Bonng Methods The soil borings were advanced using a mobile truck mounted drill ng with 10 inch hollow stem ' continuous flight auger The auger was steam cleaned prior to drilling each boring in order to reduce the potential for cross-contamination The lithology, individual well design, and other ' pertinent data were recorded on the field boring logs (Appendix B) in accordance with the Unified Soil Classification System (US CS) (Appendix B) for visual description and identification of sods ' Soil cuttings from the boring were placed in DOT approved 55-gallon drums Once they are evaluated and verified with analytical results as to whether or not the soils are contaminated, ' they will be disposed of using proper methods and protocol ' SECTION 2 SAMPLING METHODS Soil Sample Collection Soil samples were collected through the auger in 2 112-inch brass sleeves driven in a split-spoon sampler by a 140 pound hammer with a 30 inch drop All sampling equipment was!washed in Alconox solution and rinsed in distilled water prior to each usage Soil samples were driven at 5 feet intervals unless otherwise noted The blow counts, recovery and lithology were recorded on the field log (Appendix B) One brass sleeve with soil from each interval was capped, sealed, labeled in accordance with EPA protocols, recorded on chain of custody forms (Appendix D), placed in a cooler at 4 degrees centigrade or less, and transported to a California certified laboratory with the chain of custody for the specified analyses ' Field Screening of Soil Samples ' The material from the top tube in the split-spoon sampler was placed in a brass container to approximately 50 percent capacity, shaken, and stored for a period of 5 minutes A standard headspace reading was collected using a Century 128 OVA at this time and noted on the boring ' log B 1125JI RPT