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10/11/2002 13:06 707-58F-0900 VERTEX ENG PAGE 09/13 be placed inside along with cushioning (such as foam rubber, bubble wrap, or other similar packaging material) to maintain samples at 4°C. The following information will be specified for each sample on the container, label: • Sample ID number; • Sample date; • Sample time; • Samplers name; • Project name; • Analysis to be performed; and • Preservatives used. The sample ID number will be the monitoring well number. Sample handling and chain-Of-custody procedures will be in accordance with USFPA's "User's Guide to the contract laboratory Program.". Each sample will be maintained on a chain-of custody form. The Chain-of-Custody Form will,provide an accurate written record, which can be used to trace the possession and holding of samples from the time of collection through analysis and data reporting. The following information will,be specified for each sample on the Chain-of- Custody Form: 1) sequential sample number, 2) sample date, 3) sample time, 4) sample location, and S)analysis to be performed. Each sampling participant will then sign the Chain-of-Custody Form. It will be placed in a watertight plastic bag and taped to the underside of the cooler lid containing the samples designated on the form. The lid of the cooler will be securely taped shut. Samples will be shipped within one day of sample collection to the laboratory via an overnight air express carrier or by special overland carrier arrangement. Upon arrival at the laboratory, the laboratory sample custodian will check in samples. The sample custodian will: + Sign the C11ain-of Custody Form acknowledging receipt of samples from the carrier. • Verify the number of samples received from the shipment agrees with the number listed on the Chain-of.-Custody Form. + Verify that the label information, on each bottle agrees with the information documented on the Chain-of-Custody Form. Vertex will maintain separate copies of all Chain-of-Custody Forms (at the time of sample shipping) for internal sample security. 5