Laserfiche WebLink
i <br /> ' k4 KLEI NFELDER <br /> I the affected crew members This requirement is included in the complete field health and safety <br /> plan developed for the project prior to the start of field work <br /> ' A-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 soil 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 Kleinfelder'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 /> A-2.4 Hydropunch Groundwater SampIin. <br /> 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 /> 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 /> iwash followed by a distilled water rinse <br /> 28699 E01 /ST03R627 Page A-2 <br /> ' Copyright 2003,Kleinfelder,Inc April 22,2003 <br />