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tuned, and dated by the sampler when transferring the samples. Custody transfers will be <br />recorded for each individual sample; for example, if samples are split and sent to more <br />than one laboratory, a chain -of -custody record sheet will accompany each sample. The <br />number of custodians in the chain of possession will be kept to a minimum. A copy of the <br />Sampling and Analysis Chain -of -Custody Record is returned to EMCON with the <br />analytical results. <br />Groundwater Sampling and Analysis Request Form <br />A Groundwater Sampling and Analysis Request Form (see Figure D-4) or purchase order, <br />or both, will accompany the samples delivered to each laboratory. These forms serve as <br />official communication to the laboratory of the particular analysis/analyses required for <br />each sample. <br />At minimum, the Groundwater Sampling and Analysis Request Form includes the <br />p g Y <br />following information: <br />* Date submitted <br />• Specific analytical parameters <br />• Well number <br />Sample source <br />ANALYTICAL METHODS <br />Samples collected as part of the monitoring program will be analyzed consistent with <br />accepted analytical procedures. The following publications are the primary references for <br />analytical procedures: <br />• Methods or Chemical Analysis o Water and Wastes EPA -600/4-79-020, revised <br />.f Y l , <br />.f <br />March 1983 <br />• Methods for Organic Chemical Municipal Analysis o al and Industrial Wastewater <br />Y P , <br />.f <br />EPA -600/4-82-057, July 1982 <br />• Test Methods or Evaluating Solid Wastes: PhYsicallChemical Methods, EPA <br />SW -846, 3rd edition, November 1986 <br />SACW NPJ0M39\09390031.9BG-94 sdg:4 D-7 Rev. 0, 420/95 <br />