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Sample Collection - Groundwater <br /> Sample collection procedures include equipment cleaning, water-level and total <br /> well-depth measurements, and well purging and sampling <br /> Equipment Cleaning <br /> 1 Sample bottles, caps, and septa used in sampling for volatile and s� mt- <br /> volatle <br /> organics will be triple rinsed with high-purity deionized water After being rinsed, <br /> sample bottles will be dried overnight at a temperature of 200°C Sample caps and <br /> septa will be dried overnight at a temperature of 60°C Sample bottles, caps, and <br /> septa will be protected from solvent contact between drying and actual use at the <br /> tsampling site Sampling containers will be used only once and discarded after <br /> analysis is complete <br /> Plastic bottles and caps used in sampling for metals will be soaked overnight in a 1 <br /> percent nitric acid solution Next, the bottles and caps will be triple rinsed with <br /> detonized water Finally, the bottles and caps will be air dried oefore being used at <br /> the site Plastic bottles and caps will be constructed of linear polyethylene or <br /> polypropylene Sampling containers will be used only once and discarded after <br /> analysis is complete <br /> Before the sampling event is started, equipment that will be placed in the well or will <br /> 1 come in contact with groundwater will be disassembled and cleaned thoroughly <br /> with detergent water, and then steam cleaned with deionized water Any parts that <br /> may absorb contaminants, such as plastic pump valves, tubing, bailer, el.c , will be <br /> I cleaned as described above or replaced The inside surfaces of t" a, positive <br /> displacement pump tubing will be cleaned by heating the tuoing overnight at 120'C <br /> with a low-flow inert air source <br /> tOnce the tubing is cleaned and assembled with foot-check valve, a blank will be <br /> obtained by pumping organic-free water through the bladder pump assembly The <br /> pump effluent will be sampled and analyzed by EPA Method 601 or EPA Method <br /> 602 The pump effluent analysis results must register below the method reporting <br /> limit for each parameter before the pump is taken to the site for use <br /> ' Decontaminated disposable polyethylene bailers (i e "Voss Sinn; Sample <br /> Disposable Bailers") or one time polyethylene tubing may be used ri lieu of <br /> decontamination procedure <br /> During field sampling, equipment surfaces that are placed in the well or contact <br /> ' groundwater will be thoroughly cleaned and triple rinsed with deion f ad water <br /> . before the next well is purged or sampled <br /> 1 <br /> C- 2 <br />