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' Section 3 <br /> ONSITE Enviromnental Laboratories, Inc Revision 0 <br /> Quality Assurance Plan January 15, 1996 <br /> ' Page 1 of 3 <br /> 3.0 SAMPLE HANDLING PRACTICES AND CHAIN-OF-CUSTODY <br /> The objective of sampling is to collect a portion of material small enough in volume to be <br /> conveniently transported to and handled in the laboratory while still accurately representing the <br /> materials being sampled This implies that the concentrations of all pertinent components are <br /> representative of the material being sampled, and that the sample trust be handled m such a way <br /> that no significant changes m composition occur before the tests are performed <br /> 3 1 Sample Collection/Cham-of-Custody <br /> ONSITE does not routinely collect samples, however, a generic sampling pian has been <br /> issued to help ONSITE clients provide samples to the laboratory that have not been <br /> contaminated or compromised in any way This plan includes guidelines for sample <br /> containers, preservanves, storage, and holding times <br /> 3 1 1 Identification <br /> ONSITE's clients are responsible for sampling, labeling and delivering samples to <br /> the ONSITE laboratory Field personnel are requested to label sampies to <br /> identify <br /> > Project number, if applicable <br /> > Unique sample idennficanon/name <br /> ' > Sample locanon (such as borehole and depth, or grid coordinates) <br /> > Sampling date and time <br /> > <br /> Sampler identification <br /> ' > Sample preservative, if applicable <br /> 3 12 Chairs of Custody <br /> ONSITE clients are responsible for uutianng a Chain of Custody (COC) record that <br /> lists each sample and the individuals responsible for sample collection, shipment, <br /> and receipt The COC form, shown in Figure 2, is required to be signed by each <br /> 1 individual who has the samples in his/her possession A sample is considered in <br /> custody if it is <br /> ' > In a person's actual possession <br /> Wold 6 0\oeL-w3 doc <br />