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2. Upon arriving at the sample station, the neoprene rubber endsof the sample lines are <br /> checked for dirt and dust•accumulation. if necessary, the sample lines are <br /> with <br /> distilled water. <br /> 3. The pressure'vacuum line is connected to the vacuum gage of the vacuum hand <br /> Pip• <br /> The:clamp on the vacuum ,fine is opened and the residual vacuum-remaining on the. <br /> lysimeter unit Is measured,adiecorded on the lysimcter sampling log. <br /> 4: The pressurehmcuum line-is co pressure Pump and the discharge (sample) <br /> line opened The discharge line is inserted into a.clean,unpreserved 2 liter plastic bottle <br /> prqmr.d and supplied by the analytical laboratory. ' <br /> S, The pressure pump is activated, forcing air into-the lysimeter. If additional <br /> p=er-is <br /> needed to retrieve the fluid more quickly, the pressure is increased unt=il adequate flow is <br /> achieved. <br /> 6. TI`he sample is split to other appropriately preserved bottles as necessaryfor the analytical <br /> requirements. The samples are placed in an ice-filled chest to mjiutain a tcmperaYcire cif <br /> approximately 4 degrees Celsius during delivery to the laboratory under chain-of-custody <br /> procedures. <br /> `l 7- After the sample is collected, the. lysimeter vactnan.is resetevacuated <br /> ( ) to the <br /> .manufactured recommended value a'hand vamum pump. At this time,•the _ <br /> lysimcter is tested to evaluate potential leaks that could cause vacuum <br /> Pressure lass. The <br /> pressuretvacuum line is then clamped and the tyskqcw <br /> 2348384940M A-13 1u 14 2000 <br /> sea IM Kklnrcwcr,tete July <br />