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KLEINFELDFR <br /> B-2.3 Collection of Soil Samples <br /> Soil Samples are collected approximately every 5 to 10 feet for field screening and logging <br /> Samples are collected by advancing the boring to a point immediately above the desired <br /> sampling depth and then driving (vertical borings) or pushing (slant borings) a 2-inch diameter <br /> Modified California Split-Spoon Sampler, lined with three 6-inch long brass tubes, into the <br /> undisturbed sod The sampler is then removed from the bottom of the boring The ends of the <br /> bottom (third) tube are covered with Teflon and sealed with tight fitting plastic caps <br /> Each sample is individually labeled The label includes Klelnfelder's name,fob number, the date <br /> and time the sample was collected, the employee number of the individual who performed the <br /> sampling, and a unique five-digit sample identification number <br /> B-2 4 Hydropunch Groundwater Sampling <br /> 1 Hydropunch is a method to collect representative groundwater samples from boreholes without <br /> the need to install monitoring wells This method is usually used as an exploration tool for <br /> screening groundwater quality and reducing the number of wells needed at a site <br /> A boring is drilled to the desired sampling depth, usually to the top of the groundwater surface, <br /> using hollow stem augers The Hydropunch system, consisting of a steel drive point attached to <br /> a stainless steel barrel with an internal PVC slotted screen, is driven 2 to 3 feet past the bottom of <br /> the boring into the uppermost water bearing zone The barrel is connected to the surface using <br /> 1 clean, 2-inch diameter hollow steel rods The barrel is then pulled back 1 to 2 feet exposing the <br /> internal PVC screen to the soil Groundwater then enters the barrel through the screen under <br /> hydrostatic pressure and is brought to the surface with a clean, Teflon or stainless steel bailer <br /> ' The samples are immediately labeled and placed in an iced sample container <br /> Equipment used for Hydropunch sampling is decontaminated prior to use at each sampling <br /> location by steam cleaning, or by scrubbing in a trisodium phosphate or non-phosphate detergent <br /> wash followed by a distilled water rinse <br /> I <br /> 1 <br /> 1 <br /> 1 <br /> 20-1311-40 E01/2019R039 Page B-2 <br /> ©1999,Klemfelder, Inc January 20, 1999 <br />