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2. Upon arriving at the sample station, the :voprene rubber endsof the sample lines are <br /> checked for dirt and dustt-accumuladom If necessary, the sample•lines arc flushed with <br /> distilled water. <br /> 3. The pressurelvacuum line is connected to the vacuum gage of the vacuum hand pump. <br /> The:clamp oiu the vacuum line it opened and the residual vacuum.remaining on the. <br /> Iysimeter unit'is measured'and recorded on the lysinicter sampling log. <br /> 4: The pressure/vacuum line is connected to-the pressure pump and the discharge (sample) <br /> line opened. The discharge line is inserted into a.clean,iuzpreserved I liter plastic bottle <br /> prepared and supplied by the analytical laboratory. <br /> S. The pressure pump is activated, forcing air into-the lysimeter. if additional pressure•is <br /> needed to retrieve the fluid more quickly. the pressure is increased until adequate flow is <br /> achieved. <br /> 6. The sample is split to other appropriately preserved bottles as necessary-for the analytical <br /> requirements. The samples are placed in an ice-filled chest tomaintain a temperateire cif <br /> approximately 4 degrees Celsius during delivery to the laboratory under chain-of-custody <br /> procedures. <br /> ANW.711 <br /> 7` =After the 'sample is collected, the. lysizaetcr vacuum•is reset (evacuated)( acuated) to the <br /> martnfactured recommended value. using a'hand vacuum pump. At this time, the <br /> lysimeter is tested to evaluate potential leaks that could cause vacuum pressure.loss. The <br /> pressurelvacuum line is them.clamped and the lysimater <br /> secured- <br /> 83849-FOIU3 I OR325 A-13 <br /> jM IM Klc afd4cr,inc. July 14,2000 <br />