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AEGIS ENVIRomeNTAL# INC- STANDARD OPERATING PROCEDURES RE; SOIL BORING SAMPLING SOP-3. soil samples for chemical analysis art-inchested in outside thin-walled brass tubes, 4- or 6-inches long by Three or four of the tubes, plus a spacer tube, are set in a 2-inch inside diameter 18-inch split--barrel sampler. Where possible, the split-barrel sampler is driven its entire length either hydraulically or using a 140-pound drop hammer. The he brass sampler thetsoiled fromsamples, tar removed. uponhe borehole and removalfrom the containing ed brass tubes are immediately trimmed and sampler, the selectef ion sheets capped with either aluminum fOue ledor T with duct tape,p labeled nand They are then hermeticallyunde*� strict chain-of-custody, to the refrigerated for delivery, the p analytical laboratory. These volatiliizationln of Ze olatile ntorganic cross-contamination an compounds (VOC) prior to chemical analysis. one soil sample collected at each sampling internal is analyzed in c the field using either a portable photoionization detector (PID) , flame ionization detector, organic vapor analyzer, catalytic gas imeter. The purpose of this field analysis is detector or an e:cp1°s to qualitatively determine the presence or absence oThhe so�lasample and the samples to be analyzed at the laboratory. allow is sealed in either a brass tube, The PlDrior hen tic bag used t tmeasuad for some volatilization of VOC. the concentrations of hydrocarbons within the containers's he space. The data is recorded de depth correspondingnboth to the field ampl g po nt the boring logs at the p Other soil samples are collected to ctC ite and estimatee soil the stratigraphic profile beneath the prof drill relative permeequipment iif ar ethe ither steamace -cleaned aned or w shed lin and sampling triordto se at ate solution a between boreholes to minimiwater minimize the > L pr potential for cross-contamination. SOP-1/Oct. 1990