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z <br /> 2. Upon arriving at the sample station, the neoprene rubber ends of the sample lines are <br /> checked for dirt and dust-accumulation. If aectssary, the samplc lines are flushed with <br /> '. distilled waxer. <br /> I The Pressure/vacuum. line is connected to the vacuum gage of the vacuum hand <br /> pump. <br /> The:clamp on the vwuum line it opened and the residual vacuum.remaining on the. <br /> Iysirncter unit-is measured-adriecorded on the lysimeter tampling log. <br /> 4i Thep eNacuum line-is co ed pressure pump and the discharge (sample) <br /> line opened. The discharge line is inserted into acican,unpreserved I liter plastic bottle <br /> prepared and supplied by the analytical laboratory. ` <br /> 5-- The press pump is activated, forcing o-the lysimeter. If additional <br /> Pxrssure-is <br /> needed to retrieve the fluid more quickly, the pressure is increased until adequate IIow is <br /> achieved. <br /> 6. The sample is split to other appropriately preserved iotties as necessary for the analytical <br /> requirements. The samples are pjaced in an ice-filled chest to mhintain a Tore ®f <br /> approximately 4 degrees Celsius during delivexy to the laboratory under chain-of-custody <br /> procedures. ' <br /> 1 7_ After the e <br /> sampl. is collected, the. lysimeter racu=.is .reset (evacuated) to the <br /> manufactured recommended value using :a'hand vacuum pump. At this time, the . <br /> lysimeter 3s tested to evaluate potential leaks that could cause vacuum <br /> pressure Toss. The <br /> PrCSsur&Va=mm line is thea cL=pcd and die bMimeter - <br /> 23-483949401\231 OR32s A-13 <br /> =tu 1000 xjcf+r�mcr,tea July 14,2000 <br />