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i k r <br /> I1ne Geoprobe 5400 utilizes direct-push technology to facilitate collection of subsurface soil/water/Vapor <br /> . samples for cri6ronmental investigations A van-mounted hammer mechanism uses hydraulic pressure <br /> to advance small-diameter prole rods and sampling tools trio the subsurface, without generating <br /> voluminous soil cuttings or othcr,exploratory%pastes Probtngs hare been advanced to depths as great as <br /> 100 feet , <br /> For oollectinig soil samples,throe different soil sampling assemblies can be employed. The most commonly <br /> used assembly consists of four(4} 1 125-inch b,, 22-tach metal(brass or stainless steel}that fit inside a <br /> d <br /> core barrel which can be manipulated from ground surface to obtain discrete soil samples at selecte <br /> depths Continuous cores can be obtained for vieutng andfor analysis in either 1 06-tech by 22-inch or <br /> I 50-inch by 45-inch plastic liners Soil samples are presen ed for analysis in the same manner as those <br /> collected using a standard dell ng <br /> Soil vapor surreys can be conducted using the Geoprobe 5400 After ad%ancing the probe rods to the <br /> targeted depth, probe rods are pulled up to create a small%oid. Post-run tubing is then inserted through <br /> the hollow prole rods,and a %apor sample can be drawn to the surface using a%acuum tank Ground <br /> Neater samples can be obtainrd in a similar manner from the bottom of the probing v.ithout the installation <br /> of a monitoring%}ell Spargmg points and small-diameter iapor extraction txells can be installed for <br /> remediation purposes <br /> The Geoprobe is capable of penetrating surface pa%ement(concrete and asphalt)v4 ith minimal surface <br /> disturbance Since the probing tools are ad-,arced bt pushing rather than b-* drilling.no auger returns are <br /> gencrXiA thzrebi mating the need for on-site storage and disposal of in estigation-generated soils Due <br /> to the small diameter of the hole created b,. the probing tools minimal backfill materials are needed Since <br /> the Geoprobc. 5400 is a an-mounted- probing can be performed in limited access areas ee ith oe enccad <br /> • clearance of 10 feet <br />