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�� ��: w; r�""'r� S, � �.�� s;, " eco _ �u� 6 �s•.��' � ' 4 <br /> �r <br /> _ GROUNMAT'ER TECHNOIDGY <br /> STANDARD OPERATING PROCEDURE. <br /> CONCERNING SOIL SAMPLING METHODOLOGY <br /> SOP 14 <br /> i Soil sa=ples should be collected and preserved in <br /> t accordance 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 stem coil auger should be <br /> used to drill to the desired sampling depth. A standard <br /> 2 inch diameter split spoon sampler is inches in length <br /> shall be used to collect the samples. The samples are <br /> contained in 2 inch diameter by 6 inch Lang thin walled <br /> brass tuye 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 haatmer. <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 ends 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 /> a 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 retreived at each sample <br /> depth shall be analyzed in the field using a photoioni- <br /> nation detector and/or explosimeter. The purpose of the <br /> A field analysis is to provide a means to choose samples <br /> to be laboratory analyzed for hydrocarbon concentrations <br /> and to enable comparisions between the field and <br /> laboratory analyses. The soil sample shall be sealed in <br /> aplastic bag and placed in the can to accelerate the <br /> vaporization of volatile hydrocarbons from the soil. one <br /> of the two field vapor instruments shall be used to <br /> ' quantify the amount of hydrocarbon released to the air <br /> from the soils. The data shall be recorded on the drill <br /> logs at the depth corresponding to the sample point. <br /> G TECK%n")Cj.fxc. <br /> 3 <br />