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5' <br /> Appendix A <br /> Generally two soil samples from each soil boring will be submitted for chemical analysis <br /> unless otherwise specified in the scope of work. Soil samples selected for analysis f <br /> f typically represent the highest PID reading recorded for each soil boring and the sample <br /> just above first-encountered groundwater. <br /> Stockpiled Drill Cuttings and Soil Sampling <br /> Soil generated during drilling operations will be stockpiled on-site. The stockpile will be <br /> k <br /> set on and covered by plastic sheeting in a manner to prevent rain water from coming in <br /> contact with the soil. Prior to collecting soil samples, Stratus personnel will calculate the <br /> approximate volume of soil in the stockpile. The stockpile will then divided into sections, <br /> if warranted, containing the predetermined volume sampling interval. Soil samples will <br /> be collected at 0.5 to 2 feet below the surface of the stockpile. Four soil samples will be <br /> collected from the stockpile and composited into one sample by the laboratory prior to <br /> analysis. The soil samples will be collected in cleaned brass, two by six inch tubes using <br /> a hand driven sampling device. 'To reduce the potential for cross-contanlination between <br /> samples, the sampler will be cleaned between each sampling event. Upon recovery , the <br /> sample container will be sealed at each end with Teflon sheeting and plastic caps to <br /> minimize the potential of volatilization and cross-contanlination prior to chemical <br /> analysis. The soil sample will be labeled, placed on ice, and delivered to a state-certified <br /> analytical laboratory, along with the appropriate chain-of-custody documentation. <br /> Direct Push Technology,Water Sampling <br /> A well known example of direct push technology for water sampling is the Hydropunch®. <br /> For the purpose of this field method the term hydropunch will be used instead of direct f <br /> push technology for water sampling. <br /> The hydropunch is typically used with a drill rig. A boring is drilled with a hollow stem- <br /> augers to just above the sampling zone. In some soil conditions the drill rig can push <br /> directly from the surface to the sampling interval. The hydropunch is conveyed to the <br /> bottom of the boring using drill rods. Once on bottom the hydropunch is driven a <br /> maximum of five feet. The tool is then opened by lifting up the drill rod no more than <br /> four feet. Once the tool is opened, water enters and a sample can be collected with a <br /> bailer or tubing utilizing a peristaltic pump. Soil particles larger than a silt are prevented <br /> from entering the tool by a screen within the tool. The water sample is collected, labeled, <br /> and handled according to the Quality Assurance Plan. <br /> Monitoring Well Installation E, <br /> Monitoring wells will be completed by installing 2- to 6-inch-diameter Schedule 40 <br /> polyvinyl chloride (PVC) casing. The borehole diameter for a monitoring well will be a <br /> minimum of four inches larger than the outside diameter of the casing. The <br /> 2-inch-diameter flush-threaded casing is generally used for wells dedicated 1for <br /> groundwater monitoring purposes. <br /> i <br /> E <br />