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rinsed with potable water or steam-cleaned. The liners will generally be placed in a 2-inch- or 2.5-inch-diameter split-spoon sampler and then driven or pushed into the soil at the selected. sampling depth. The sample will be parted at the joints between the liners using a clean, sharp stainless steel knife or spatula. Alternatively, a subsample for chemical analyses may also be collected by driving a smaller-diameter liner into the center of the larger core sample, taking care to reduce the potential for sample disturbance and air space within the liner. If the soil sample is collected using a hand auger, a subsample should be collected from the core of the auger, again taking care to reduce the potential for sample disturbance and air space within the liner. If the sample is to be analyzed for non-volatiles only, a loose sample may be placed in a glass 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 SOIL SAMPLING FOR CHFYi IICAL.ANALYSIS Page 2 of 6 MSCTROTOSS.TXT REVISION DATE:MARCH 1996 - SS-2