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Soil Sampling Using Direct Push SOP Soil Sampling Using Direct Push SOP 1.0 Scope/Applicability: This standard operating procedure (SOP)provides guidance for sampling soil using a direct push sampler. Soil sampling using a split barrel sampler is typically used in conjunction with direct push drilling (see Direct Push Drilling SOP). Subsurface sampling attempts to remove soil below the ground surface in a relatively undisturbed state in order to evaluate the extent of contamination at specific depths. Soil samples shall be collected based on visual evidence of contamination, discoloration or staining, photoionization meter or other organic vapor, or inorganic meter readings, odors,predetermined depth, and any other appropriate field screening method. This procedure is applicable to soil samples collected as part of direct push drilling. 2_0 Summary: This procedure entails collecting soil samples with a specially designed sample tube, such as a Macro-core® or dual-tube sampler. The sample tube is pushed and/or vibrated to the top of the specified sampling depth. The sample tube is then driven into the soil the length of the sampling tube. The probe sections and sample tube are then withdrawn from the borehole, and the sample is extruded from the tube into sample jars. 3_0 Health and Safety: Antea Group personnel are not permitted to operate the direct push samplers. This is a task to be done by licensed drillers. Additionally, Antea Group staff are not permitted to function as driller's helpers during drilling activities. The Health and Safety considerations for conducting this procedure are described in the following documents: • Site Health and Safety Plan—H&S Plan Templates • Job Safety Analysis—(drilling subcontractor to provide this) 4.0 Cautions and Interferences: Cautions associated with conducting this procedure include: • Obtaining enough volume of soil for multiple analyses from one sample location may present a problem. The direct push soil sampling method recovers a limited volume of soil and it is not possible to reenter the same hole and collect additional soil. • When multiple analyses are to be performed on soil samples collected with the direct push soil sampling method, it is critical that the relative importance of the analyses be identified. Identifying the order of importance will ensure that the limited sample volume will be used for the most crucial analyses. • Removal of the macrocore sampler from the borehole is required to facilitate sample collection and increases the risk of material from the boring sidewall or from the ground surface falling into the borehole. To collect subsequent samples at a greater depth the sampler must be re-inserted into the borehole, thus increasing the likelihood that sidewall soils or material that had fallen into the borehole become integrated into the target sampling interval. Control#:AG-10040-00 Page 3 of 8 File name:Soil Sampling Using Direct Push SOP