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APR-05-04 MON 12:29 PMELL NELSON SCHRIMP FAX NO. 2 26-9320 '12/05/2000 M10 FrV 209 A 11 P, 10 .,y U1V m { XLEIYFELDER A-2.3 Collectins Gf Soil Baruples Soil samples are collcctul approxhvately every 5 to 10 fat for field screening and logging. Samples are collected by advancing the boring to a point immediately above rte desired sampling depth and then driving (vertical borings) or pushing (slant borings) a 2-inch diameter Modified California. Split-Spoon Sampler, lined with arse 6•inclr long brass tubes, into the undisturbed soil, 'The sampler is then removed from the bottom of the boring. The ends of the bottom(third)tube are covered with Teflon and scaled with tight fitting plastic caps. Bach sample is individ rally labeled. The label includes Kleinfelder's rams,job number,the date And time thu sample was collected, ilia employee number of the individual who performed the sampling,and a unique five-di iL sample identijIvAinn number. Ii-2.4 Hydropunch GroundwaterSamplling Hydropunch is a method to collect representative groundwater samples front boreholes without the need to install morlitoring wells. This method is usually used as an exploration tool for tereenlug groundwater quality and reducing the number of wells needed at a site, A boring is drilled to the desired sampling depth, usually to the top of the groundwater surface, using hollow stem augers. The Hydropuneh system, consisting of a steel drive point attached to a stainless stool barrel with an internal PVC slotted screen,is driven 2 to 3 feet past the bottom of the boring into the uppermost water bearing tone. The barrel is connected to the surface using clean,2-inch diameter hollow steal rods. 'nit barrel is then pulled back I to 2 feat exposing the internal PVC scroon to the soil. Groundwater then mtcrs rhe barrel through the screen order hydrostatic pressure and is brought to the surface witlh a clean, Teflon or stainless steel bailer. The samples are itnmodiately lebcled and placed in an iced sample container. Equipment used for Hydropunch sampling is decontamiva:ed prior to use at each sampling location by stern cleaning,or by scrubbing in a trisodium phosphate or non-phosphate detergent wash followed by a distilled water rinse. 8-2.5 Collection-of RAI'Pr•obc Grouudvraler Samples 0,o-timeotuidwater samprles ar,colla ted using a FAT nrobe, which is an insiht grotu;dwater- s:mplhig device. The borings are first advanced to a point immediately above the desired nz�r�tPsoe.ersvrsroaFaa3 o�::�sar s,.cot g2GGt tCleinRl'c� Inc. "1Z"ii ct'ix