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Appendix A i } - typically represent the highest PID reading recorded for each soil'boring and the sample just above first-encountered groundwater. f Stockpiled Drill Cuttings and Soil Sam lin Soil generated during drilling operations will be stockpiled on-sited' The stockpile will be in a manner to prevent rain water from coming in set on and covered by plastic sheeting p " contact with the soil. Prior to collecting soil samples, Stratus personnel will calculate the approximate,volume of soil in the stockpile. The stockpile will then divided into sections, 1 if warranted, containing the predetermined volume sampling inteval. Soil samples will be collected at 0.5 to 2 feet below the surface of the stockpile. Four soil samples will be collected from the stockpile and composited into one sample by.',pthe laboratory prior to analysis. The soil samples will be collected in cleaned brass, two by six inch tubes using a hand driven sampling device. To reduce the potential for crass-contanlination between samples, the sampler will be cleaned between each sampling event. Upon recovery, the sample container will be sealed at each end with Teflon sheeting and plastic caps to minimize the potential of volatilization and cross-contanlination prior to chemical analysis. The soil sample will be labeled, placed on ice, and delivered to a state-certified analytical laboratory, along with the appropriate chain-of-custody documentation. Cone Penetrometer Tool CPT Testing The CPT method consists of advancing a cone-tipped cylindrical probe (1.7 inches in + diameter) into the ground while simultaneously measuring the resistance to penetration. The CPT method determines soil lithology by comparing the force (cone bearing pressure) required to advance the probe (Qt) to the friction ratio (Rf) (Rf equals sleeve friction [FJ divided by the probe tip load, times the penetration pore pressure [UdD. z Computer generated CPT logs will be plotted in the field, providing the field representative a graphical log of subsurface soil lithology. A CPT test data report, which will include logs of all CPT data, graphical geologic logs, and additional information on the CPT technique, will be submitted with the final report. ii CPT testing will be performed in accordance with American Society of Testing and Materials (ASTM) 1 Method D3441. ' ' collar installed at the ground surface. The cone testing will be performed inside of a grout co gr k The grout collar will allow the CPT contractor to f backfill the boring as the steel rods are retracted from the hole. Continuous grouting will prevent cross`contamination of water bearing zones that can occur through an open borehole. The boring will be backfilled to surface grade. An asphalt patch will be placed over the borehole. Direct Push Technology,Water Sampling { A well known example of direct push technology for water sampling is the Hydropunce. i For the purpose of this fieldmethod the term hydropunch will be used instead of direct push technology for water sampling. The hydropunch is typically used with a drill rig. A boring is drilled with hollow stem- augers to just above the sampling zone. In some soil conditions the drill rig can push