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yy;; _�,. � � �.v..f �x,k'"'•" �� -.%fie,--`94ra+ Mew.` a. y� �,� ,:i k i r N� a,.�er•. '� t �r� <br /> t <br /> GROUNDWATER TECHNOLOGY <br /> STANDARD OPERATING ]PROCEDURE. <br /> CONCERNING SOIL SAMPLING MMODOLOGY <br /> SOP 14 <br /> Soil sazples should be collected and preserved in <br /> occordanae with Groundwater Technology Laboratory's <br /> _.. Standard Operating Procedure (GTL SOP 15) concerning <br /> Soil Sample Collection and Handling when Sampling for <br /> Volatile organics. A hollow $tem soil auger should be <br /> used to drill to the desired sampling depth. A standard <br /> 2 inch diameter split spoon sampler 18 inches in length <br /> shall be used to collect the samples. The samples are <br /> contained in 2 inch diameter by d inch long thin walled <br /> brass tube liners fitted into the split spoon sampler <br /> (three per sampler) . <br /> The split spoon sampler should be driven the full depth <br /> of the spoon into the soil using a 140 pound hammer. <br /> The spoon shall then be extracted from the borehole and <br /> the brass tube liners containing the soil sample removed <br /> from the sampler. The ands of the liner tubes should be <br /> immediately covered with aluminum foil, sealed with a <br /> teflon or plastic cap, and then taped with duct tape. <br /> After being properly identified with sample data entered <br /> on a standard chain of custody form the samples shall be <br /> placed on dry ice (maintained below 4'C) and transported <br /> to the laboratory 'within 24 hours. <br /> One of the three soil samples rotreived at each sample <br /> depth shall .be analyzed in the field using a photoioni- <br /> zation detortor and/or explosimeter. The purpose of the <br /> field analysis is.to provide a means to choose samples <br /> to be laboratoryhnalyzed for hydrocarbon concentrations <br /> and to enable :omparisions between the field and <br /> laboratory analyses. The soil sample shall be sealed in <br /> a plastic bag and placed in the sun to accelerate the <br /> vaporization of volatile hydrocarbons from the sail. One <br /> of the two field vapor instr=onts shall be used to <br /> quantify the amount of hydrocarbon released to the air <br /> from the soils. The oata shall be recorded on the drill <br /> logs at the depth corresponding to the sample point. <br /> GRri�•xrn+�tER <br /> "e Ter►e \ou)c►.I�c <br /> t� <br />