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Trocar Research Carparatian <br /> P� <br /> t ':J <br /> j SAMPLING AND ANALYTIC A�zoCC'DURES <br /> Tracer Research Corporation utilized an analytical field van <br /> which was equipped with two as <br /> chromatographs and two Spectra <br /> Physics SP4270 computing integrators. <br /> In addition, the van has <br /> two built-in gasoline powered <br /> _ generators which provide <br /> electrical power { 110 valts AM to operatthe <br /> chromatographic instrumentse all of the gas <br /> and field equipment. A specialized <br /> hydraulic mechanism consisting of two cylinders and a set of"jaws <br /> was used to drive and withdraw the s <br /> consist of ampling probes. probes <br /> _ 7-foot lengths of 3/4 inch diameter steel Pipe which. <br /> t are fitted with detachable. pi <br /> drive point, A hydraulic hammer was <br /> used . to assist in driving f` <br /> - 9 Probes past cobbles and through <br /> 11 unusually hard soil . <br /> So i Ig'as'. samples--r3 plea were collected by driving <br /> a <br /> probe to a depth less than 14 feet into the 9 hallow steel <br /> - ground. . The above- <br /> . ground end. of the sampling probes were <br /> reducer.. and with a steel <br /> and. a Ienath of polyethylene tubing leading to a vacuum . <br /> Pump. Five to 10 liters of gas was evacuated with a vacuum <br /> pump' <br /> During the sail <br /> gas evacuation, samples were collected by <br /> s: <br /> inserting a syringe needle through a silicone <br /> rubber sea in <br /> # the eva <br /> gment <br /> cuationline and into the. steel <br /> f. mi 11probe. Ten <br /> j gas were collected for immediate analysis in the <br /> ! TRC analytical field van. Sail gas was subsampled (duplicate <br /> injection <br /> from 1 <br /> G) in volumes ranging <br /> _ the-VC1C ,concentration at PL to 2 mLr depending on__ <br /> any particular location. <br /> k . P- Grourdwater samples were collected by driving a #callow steel <br /> 8 : <br /> ' Probe .to a depth less than. 14 feet into the <br /> .. <br /> ;r <br /> Polyethylene tubin was: ground. A length of <br /> g inserted to the bottom af .the probe. The <br /> -` <br /> tubing - <br /> i ' g ,was attached- to .a peristaltic' <br /> Pump Approximately 40 mL of <br /> water was collected in battles with teflon lined septum caps so , <br /> -; as to exclude air. Any sediment collected with the <br /> was allowed tgroundwater <br /> o <br /> settle. The water was subsampled (duplicate <br /> injections) in volumes ranging from 1 KL to 10 NL. <br /> 3 - <br />