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16. 4.1 Sampling Techniques As described in Section 2.0, soil samples will be collected during excavation activities. After reaching the desired excavation depth, a ' clean decontaminated two-inch diameter brass sampling tube will be driven into the soil . The ends will be sealed with teflon or aluminum foil , ' capped, and placed in sealed zip lock bags. ' Water samples will be collected in the event that water is encountered in the excavation. Samples will be collected in laboratory cleaned glass jars equipped with teflon lined lids. 4.2 Sample Handling and Chain of Custody 1 The brass tubes and glass jars will be labeled using a waterproof marker to ' designate the location, date, sample ID and depth at which the sample was taken. All samples will then be placed in a cooled ice chest and shipped to the analytical laboratory for 48-hour analyses. A separate chain of custody form will be included with each ice chest and will be placed in a sealed plastic bag. When transferring samples, the individuals relinquishing and receiving will sign, date, and note the time on the chain of custody form. A designated sample custodian will accept the shipped samples at the laboratory and will verify that the sample ' identification numbers match those on the chain of custody record. ' The custodian will enter the sample identification number data into a log book which is arranged by project code and station number. The laboratory ' custodian will use the sample identification number or assign a unique laboratory number for each sample and will ensure that all samples are transferred to the proper analyst, or are stored in the appropriate secure area. The custodian will distribute samples to the appropriate analysts. Laboratory personnel are responsible for the care and custody of samples C$noweEnvironmental