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2. Upon arriving at the sample station, the rvoprene rubber ends of the sample lines are <br /> 1 checked for dirt and dust-accumulation If necessary, the sample.lines are flushed with <br /> 1 distilled water. <br /> 3. The pressuretvacuum line is connected to the vacuum gage, of the vacuum hand pump. <br /> The.clatnja on the racuum line, it openi6d and the: residual .vacuum.remaining on the. <br /> 'lysimetcr unit Is measurcd'and recorded on the lysimeter sampling log. <br /> 4: The pressurelvacuum line-is connected to pressiire pump and the discharge (sample,) <br /> line opened. The di:;chargeline is inserted <br /> into a-clean,unprescrvcd 1 liter plastic bottle <br /> prepared and supplied by the analytical laboratory. ' <br /> S. The pressure pump is activated, foicing 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 to maintain a temper ti f <br /> approximately 4 degrees Celsius during deUvery to the laboratory under chain-of-custody <br /> procedures. <br /> ` 7_ =After the sample is collected, the. ly 'r, eter vacuum.is reset (evacuated) to the <br /> manufactured recommended value using a'hand va'cmm pump. At this time, the <br /> lysirnetcr is tested to evaluate poteutiat leaks that could cause vacuum <br /> Pressure lose The <br /> pressure wcuuan line is then cLmn ped and the jysimeter scoured. <br /> 8380-FOM.3I OR32s A•13 <br /> CopydgM 2000 rjcWdQa.Inc. July 14,200 <br />