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wood. jar. Samples to be analyzed for metals may be homogenized before analysis either in the field or by the laboratory to provide results more representative of average concentrations in the sampling interval. 2.2 SAMPLE COLLECTION DURING EXCAVATION Excavated soil will be sampled as required under the appropriate agency guidelines, if applicable, or as necessary to provide the data desired. The lateral and vertical dimensions of the excavation, as well as the sample location and depth, will be mapped, and the volume estimated. If possible, samples will be collected from the backhoe or excavator bucket without entering the excavation. Samples may be collected directly from the walls or floor of the excavation, provided Occupational Safety and Health Administration (OSHA) regulations are followed before entering an excavation. Soil stockpiles also may be sampled after completion of excavation. If they are sampled, the stockpile location, dimensions, and sample locations will be mapped, and the stockpile volume will be estimated. If compositing of soil samples containing volatile compounds is required, it should be performed by the laboratory. The soil from excavations or stockpiles should be sampled by scraping away 3 to 6 inches of surface soil or hand augering to a known depth. A clean glass jar, brass tube, or stainless steel tube will be forced into the soil to completely fill the container, or a clean hammer sampler may be used in conjunction with brass or stainless steel liners. 3.0 SAMPLE HANDLING AND PRESERVATION Soil samples will be handled using the following procedures: 1. Clean gloves appropriate for the chemicals of concern will be worn by the sampler before touching the sample containers, and care will be taken to avoid contact with the sample. 2. The sample will be quickly observed for color, appearance, and composition. The ends of the liners will be immediately covered with Teflon® sheeting and/or aluminum foil, capped with plastic end caps, and sealed with tape. Glass jars will be immediately sealed with a lid. 3. The sample container will be labeled before or immediately after sampling with a self- adhesive label having the following information written in waterproof ink: • Wood Environment & Infrastructure Solutions, Inc. • Project number • Sample ID number • Date and time sample was collected • Initials of sample collector H:\AMEC\Field Protocols\Wood Protocols\PROTO-SS 0802.doc SOIL SAMPLING FOR CHEMICAL ANALYSIS Revision Date: February 2015 Page 2 of 5