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APPENDIX B <br /> HOLLOW-STEM AUGER DRILLING AND SOIL SAMPLING PROCEDURES <br /> I Undisturbed soil samples will be recovered from soil without <br /> introducing liquids into the borings . Soil samples as core will <br /> be taken at 5-feet depth intervals from ground surface to <br /> termination depth, or through the aquifer zone of interest for <br />' lithologic logging . <br /> Borings will be drilled with a hollow-stem auger and sampled with <br />' a California or modified California-type split-spoon sampler. <br /> Soil samples will be of sufficient volume to perform the analyses <br /> which may be required, including replicate analyses. <br />' Soil from all borings will be described in detail using the <br /> Unified Soil Classification System and will be logged by a <br /> geoJogist, civil engineer, or engineering geologist who is <br />' registered or certified by t:-ie State of California and is <br /> experienced in the use of the Unified Soil classification System. <br />' All wet zones above the free water zone will be noted and <br /> accurate "y logged . <br /> Soil samples will be collected in clean brass or stainless steel <br /> sampling tubes in the split-spoon Sediment traps will be used <br /> when unconsolidated sands and gravels fall from the sampler <br /> during retrieval . The brass tubes will be cut apart using a <br />' clean knife The ends of the tubes will be covered with a thin <br /> sheet of Teflon tape or aluminum fail beneath plastic end caps <br /> and sealed with electrical or duct tape and properly labeled. <br /> The samples will be stored on ice at a temperature of 4 degrees <br />' Celsius . <br /> Drill cuttings will be stored on site in 55-gallon drums or <br />' covered with plastic sheeting . Analytical results will be <br /> submitted immediately to the site owner for determination of <br /> appropriate disposal procedures . The soil borings not completed <br />' as wells will be backfilled with a cement grout. <br /> 1 <br /> 1 <br />