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CHAIN OF CUSTODY PROTOCOL <br /> Chain of custody protocol is followed for all soil and ground water samples selected for <br /> laboratory analysis. The chain of custody form(s) accompanies the samples from the sampling <br /> locality to the laboratory, providing a continuous record of possession prior to analysis. <br /> DECONTAMINATION <br /> Drilling andSQil Sampling <br /> I <br /> Drilling equipment is decontaminated by steam cleaning before being brought onsite. The augers <br /> are also steam cleaned before each new boring is commenced. Prior to use, the sampler and <br /> sampling tubes are brush-scrubbed in a Liqui-nox and potable water solution and rinsed twice in <br /> clean potable water. Sampling equipment and tubes are also decontaminated before each sample <br /> is collected to avoid cross-contamination between borings. <br /> i <br />