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Wright Environmental Services, Inc. <br />3. The soil samples in the lowermost of brass liners in the sampling tool (if used) <br />will be retained for chemical testing. The samples will be labeled and sealed in the <br />field in their original liners. Sample liners ends will be sealed with Teflon® paper or <br />aluminum foil, capped with clean cap plugs, and labeled and logged onto chain of <br />custody forms. All samples retained for chemical analysis will be stored on ice in a <br />clean, covered cooler-box/ice chest for transport to the Laboratory (see chain-of <br />custody below). <br />Reconnaissance Groundwater Sampling Procedures <br />This procedure is used when reconnaissance groundwater sampling without <br />permanent wells is desired. Sampling from open pits or excavations, HydroPunch®, <br />GeoProbe® or temporarily cased open boreholes may be used. <br />Reconnaissance groundwater sample handling, and storage will follow <br />suggested guidance documents of the Environmental Protection Agency and Regional <br />Water Quality Control Board and local agency guidelines for site investigation. <br />Reconnaissance groundwater samples will be collected in the field in <br />temporarily cased exploratory boreholes using clean Teflon® or disposal bailers. The <br />samples will be collected from excavations or temporarily cased exploratory <br />boreholes and poured into the properly prepared laboratory containers with <br />minimum cavitation. All sample containers will be properly sealed with minimum <br />headspace, labeled, and identified. Label information will include the date, sampler <br />name, sampling time, and identification number, and the project name and number <br />and chain-of custody. <br />The sample will be delivered to a State Certified Laboratory. Samples will be <br />kept on ice and/or refrigerated continuously for shipment to the Laboratory under <br />chain-of-custody. The sealed sample will only be opened by Laboratory personnel <br />who will perform the chemical analysis. The samples will be analyzed according to <br />the approved EPA Method and storage for that requested analysis. <br />: <br />WES Sampling Protocols Page 3