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Cone Penetrometer Testing/HydroPuncO (CPT/HPO) technology will be used because lithological information and samples can be collected without producing soil cuttings that would require disposal. Initially, lithological information will be collected as the CPT advances. Two HydroPunch0 samples will be collected from each CPT location. The first sample will be collected at a depth approximately 3 feet below first groundwater. If the depth to floating product can be determined, the samples will be collected beneath this layer. The second groundwater sample at each location will be collected at a depth just above a clay layer or at a maximum depth of 50 feet bgs. The purpose of this second sample at each location is to determine if there is a separate phase of TCE or if a vertical distribution of TCE in groundwater exists. All CPT/HP8 holes will be abandoned by pumping a bentonite/neat-cement mixture through a tremie pipe from the bottom of the boring. The groundwater samples will be analyzed for TCE and benzene, toluene, ethylbenzene, and xylene (BTEX) using U.S. EPA Method 8260 (low level). If necessary to achieve lower detection limits, U.S. EPA Method 8010/8020 will be used. The anticipated high concentrations of petroleum hydrocarbons may require sample dilutions in the laboratory, increasing the detection limit for TCE. The above analytical method that allows the lowest detection limit for TCE will be the only one reported by the laboratory. Quality assurance/quality control (QA/QC) will include collection of one equipment blank and one field duplicate sample. Laboratory QA/QC will be performed in accordance with U.S. EPA SW846 (U.S. EPA, 1986). 6