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Ms. Mary Meays <br /> September 11, 1997 <br /> Page 3 <br /> with a Teflon® sheet and plastic caps. The sample is then placed in a Ziploc®type bag and sealed. <br /> The sample is labeled and refrigerated at approximately 4° Celsius for delivery, under strict <br /> chain-of-custody,to the analytical laboratory. <br /> Sample Identification and Chain-of-Custody Procedures <br /> Sample identification and chain-of-custody procedures document sample possession from the time of <br /> collection to ultimate disposal. Each sample container submitted for analysis has a label affixed to <br /> identify the job number, sampler, date and time of sample collection, and a sample number unique to <br /> that sample. This information, in addition to a description of the sample, field measurements made, <br /> sampling methodology, names of on-site personnel, and any other pertinent field observations, is <br /> recorded on the borehole log or in the field records. The samples are analyzed by a Califomia-certified <br /> laboratory. <br /> A chain-of-custody form is used to record possession of the sample from time of collection to its arrival <br /> at the laboratory. When the samples are shipped, the person in custody of them relinquishes the <br /> samples by signing the chain-of-custody form and noting the time. The sample-control officer at the <br /> laboratory verifies sample integrity and confirms that the samples are collected in the proper <br /> containers,preserved correctly, and contain adequate volumes for analysis. <br /> If these conditions are met, each sample is assigned a unique log number for identification throughout <br /> analysis and reporting. The log number is recorded on the chain-of-custody form and in the <br /> legally-required log book maintained by the laboratory in the laboratory. The sample description, date <br /> received, client's name, and other relevant information is also recorded. <br /> If you have any questions regarding this matter, please do not hesitate to contact Eric Hohn at <br /> (916) 638-2085. <br /> Sincerely, <br /> DELTA ENVIRONMENTAL CONSULTANTS, INC. <br /> ve� <br /> Eric J. Holm, R.G. <br /> Project Manager <br /> MAB(CL005.090) <br /> Enclosure <br /> cc: Mr. Ed Marchese, Holz Rubber Company, Inc. <br /> Mr. Drew Smith, BBA U.S. Holdings <br /> Mr. Greg Murrer, BBA U.S. Holdings <br /> Mr. Stephen Henshaw, Henshaw&Associates <br /> Ms. Ann Farr, Farr and Associates. <br />