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litC ;31 euue 11 : 11RM GREGG DRILLING 9253130302 P.3 §R!GG I N S IT I N C. �7 Geotechnical and Environmental In Situ Testing Contractors u SOIL SAMPLING a `J A piston type soil sampler Is used to collect t relatively undisturbed soil samples without generating any soil cuttings. ,Two size pis- ton type samplers are used, 12 inch and 18 inch, depending,on the density of the soil 1 Q, and the amount of sample required for analysis. The soil' sampler is initially p ushed in the '•Y'n.�r4-�/M /�N+i'�C�f� .x _ - i��;}�� , closed position to the desired sampling in- The posh rods are then retracted, Cy Jitt;t , , , T!4, a roximetel 12.inches or 18 inches de- x_ u ,: a aT ,,r' ,r �x pending on the length of the sampler), Which also retracts th ff � ;- +,�'�_i~ ,.; . :etc i;;��• ,; r ,•' �,•` s• a inner rod and ti of the p ;s..,• soil sampler. The sampler is then pushed In a "open" or 'locked" position to k .. collect a soil sample. After the sample is r' has been collected, the sampler and the push rods are withdrawn from the test hole Yrinto to the CPT truck, The sample rings rU i two 1.25 inch diameter by 6 inch long or four 3 Inch long for the 12 inch sampler and °- two 1.5 inch diameter by 6 inch long for the u 18 inch sampler) are then removed from "I the sampler and ssaied with Teflon and plastic caps. The sampler is then decon- taminated and ready to deploy to. collect another sample. - fh'47�^n Ir M"' +' �,,,�r, x yJ u Y•� .�t t t„t,�t 7 , '� a,.�a�l�,.�.,�`;f�`1•h4,� y/ 41 IM1 i� '�•i fs � a u `J Los Angeles(corporate)•San Francisco•Houston•Charlston Vancouver a Salt Lake City-New Jersey Tel:(562)427-6889•Fax(562)424-2329-Website:ww>,a•greggdolling.com u U