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r � I <br /> Appendix B <br /> confirms that the samples are collected in the proper containers, preserved correctly, and <br /> contain adequate volumes for analysis. <br /> If these conditions are met, each sample is assigned a unique log number for <br /> identification throughout analysis and reporting. The log number is recorded on the <br /> chain-of-custody form and in the legally-required log book maintained by the laboratory <br /> in the laboratory. The sample description, date received, client's name, and other relevant <br /> information is also recorded. <br /> Equipment Cleaning <br /> Sample bottles, caps, and septa used in sampling for volatile and semi'volatile organics <br /> will be triple rinsed with high-purity deionized water. After being rinsed, sample bottles <br /> will be dried overnight at a temperature of 200°C. Sample caps and septa will be dried <br /> overnight at a temperature of 60°C. Sample bottles, caps, and septa will be protected <br /> from solvent contact between drying and actual use at the sampling site. Sampling <br /> containers will be used only once and discarded after 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 deionized <br /> water. Finally, the bottles and caps will be air dried before being used at the site. Plastic <br /> bottles and caps will be constructed of linear polyethylene or polypropylene. Sampling <br /> containers will be used only once and discarded after analysis is complete. <br /> Before the sampling event is started, equipment that will be placed in the well or will <br /> come in contact with groundwater will be disassembled and cleaned thoroughly with <br /> detergent water, and then steam cleaned with deionized water. Any parts that may absorb <br /> contaminants, such as plastic pump valves, etc. will be cleaned as described above or <br /> replaced. If a positive displacement (bladder) pump is used the inside surfaces of the <br /> pump tubing will be cleaned by heating the tubing overnight at 120°C with a low-flow, <br /> inert air source. <br /> Once the bladder pump is cleaned and reassembled, a pump blank will be obtained by <br /> pumping organic-free water through the bladder pump assembly. The pump effluent will <br /> be sampled and analyzed by EPA Method 601 or EPA Method 602. The pump effluent <br /> analysis results must register below the method-reporting limit for each parameter before <br /> the pump is taken to the site for use. <br /> During field sampling, equipment surfaces that are placed in the well or contact <br /> groundwater will be steam cleaned with deionized water before the next well is purged or <br /> sampled. <br /> i <br /> • 1 <br />