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Title: Sampling and Analysis Plan for Environmental Control Number: Revision Date: Page 11 of 23 <br /> Groundwater Monitoring PUE.EN.D.026.03 10/18/2019 <br /> 3.6.1 Sample Handling <br /> Samples will be packaged and preserved in a manner prescribed by the applicable analytical <br /> method. Method-specific holding time requirements will be observed. <br /> 3.6.2 Sample Custody Documentation <br /> The following describes the proper procedure for labeling and documenting samples once they <br /> are collected. <br /> Sample Labels <br /> Label all sample containers using waterproof ink. Clear packaging tape may be applied over <br /> the completed label, as necessary, to prevent the label from loosening in a cooler containing <br /> ice. Sample bottles may also be placed in Ziploc-type bags for protection. Information <br /> commonly provided on sample labels includes: <br /> • Sample number or designation; <br /> • Site or project name; <br /> • Sample collection date and time; <br /> • Preservative and filtration status; <br /> • Analytes requested; and <br /> • Sampler's name or initials. <br /> Chain of Custody Forms <br /> Record all samples chronologically on chain of custody forms. All entries to chain of custody <br /> documents will be made in ink. The chain of custody document(s) will be placed in a Ziploc- <br /> type plastic bag and enclosed in the sample cooler or shipping container. The sample cooler <br /> will be custody-sealed as described below. <br /> Custody Seals <br /> Custody seals are used to assure the integrity of samples from the time the samples are collected <br /> and logged into the chain of custody system until the samples are received by analytical <br /> laboratory personnel. Samples will be shipped to the laboratory in coolers or other appropriate <br /> shipping containers. The cooler or shipping container must be custody-sealed in a manner <br /> which requires the destruction of the seal at the time of opening whenever a third party delivery <br /> service is used. Such coolers or shipping containers will also be taped shut, with a layer of <br /> clear packaging tape placed over the custody seal to minimize the likelihood of accidental <br /> destruction during shipping and handling. <br />