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FUGRO WEST, INC. <br /> STANDARD OPERATING PROCEDURES <br /> RE: VAPOR SAMPLING: "TEDLAR" BAG SAMPLING TECHNIQUE <br /> SOP-9c <br /> Prior to vaocr samoting, the vacuum system must reach a stabilized air flow (cubic feet <br /> per minute) ror aaproximately 15 minutes --nor to the actual collection of the vapor <br /> Sample the following data is reccraea air TICW temperature and pressure at collection <br /> ports and gauges <br /> he sampling eauloment consists c, a new -, - ,ter Tedlar' bag, a bag sampier a section <br /> --r new 114-ticn-aiameter polvethviene ucinc (approximately 3 feet long), ana sampling <br /> -arts 7 he baa samcler is a vacuum c^amcer-oased sampler wnich fills the sample bag <br /> cy appryrng a vacuum to the outsice -r tie samoie oag (samale goes not contact pump <br /> nternals) '— sampling ports are :arced ::,ass connections threaded into a tapped <br /> Mole in the system piping at selec.ea locations <br /> �zamcles are czitectea cy sliopinc ::-e enc ::r the tubing over the sampiina port and <br /> nsertina the caner ena thrauan a _=r-cression fitting in the bag samoler casing ana <br /> -cnnectina , -e 7ealar' cae r-e air ;amate contacts only the tuning i ire bag <br /> samoter is c-erazec until the 'i ec:a:- -aa is -,ilea ,a 314 or voiume caoacity 7 ne samole <br /> s ctacea in =_ -C,-,-reTrieeratea mrJ =—ier Lviin s"iiicient catling to ellminatea damage <br /> wring transcor -:otina samples mil cause c-ncensation OT moisture within the sample <br /> -ossioly cistcrting iaiDoratory anawsis <br /> minimize the ocientiat for cross-ccntaminarion cetween air samples the ooivethylene <br /> `uoing is crscarcea and reetacea vvicn new zuctna <br /> Vaocr samcies are suclect to very iimitea raiding times typically 72 hours 7~ieretore <br /> samples are suamittea to the laooratory as soon as possiDle <br /> Fugro West Inc <br /> SOP-9ciOctober 1994 <br />