Laserfiche WebLink
Y, TK <br /> GROUNDWATER TYCHNOLOGY <br /> STANDARD OPERATING PROCEDURE <br /> CCNCERNING SOIL SAMPLING METHODOLOGY <br /> SOP 14 <br /> Soil samples should be collected and preserved in <br /> 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 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 6 inch long thin walled <br /> brass tube liners fitted into the split spoon samDler <br /> (three per sampler) . <br /> The split spoon samoler should be driven the full depth <br /> of the spoon into tte 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 ends of the liner tubes should be <br /> imaediately covered ;with aluminum foil, sealed with a <br /> teflon or plastic cap, and then taped with duct tame. <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 retrieved at each sample <br /> depth shall be analyzed in the field using a photuioni- <br /> zation detector and/or exDlosimeter. The purpose e£ the <br /> field analysis is to provide a means to choose samples <br /> to be laboratory analyzed for hydrocarbon concentraticr.s <br /> and to enable compariscns between the f?eld and labor- <br /> atory analyses. The soil sample shall be scaled in <br /> a p iastic bag and placed in the sun .to accelerate the . <br /> van_ orization of volatile hydrocarbons frcn the soil. One <br /> oz the two field vapor ^st__:,�ents s;zall be used <br /> cuantify the amount cf hvdrecanccn released to the air . <br /> from t: e stile. The data s^all ce _ecoraed on the d_-_1 <br /> to the sample point. <br /> lacs at the depth cor_esooncir, <br /> 1.:r <br />