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PROPOSED INVESTIGATION Apex proposes hydraulically pushing seven Geo Probe borings on-site to further define the extent of petroleum hydrocarbons in the soil-and groundwater beneath the site (Figure 7). Apex proposes to advance the seven soil probe borings to an anticipated total depth of 15 feet below grade (bg), or until groundwater is reached. _S.oil_.core.sampling.will be.conducted using 5-foot sections of decontaminated 314-inch I.D. galvanized steel probe pipe. The probe pipe is connected to a one foot, 1/4-inclame er, galvanized steel soil core tube. Stainless steel decontaminated insert rods are placed through the probe pipe and sampling core. The probe pipe, soil core and insert rods are together pneumatically driven to the depth the soil core is desired. The insert rods are removed and the probe pipe and core tube is driven one foot to obtain the soil core sample. The probe pipe containing the soil core sample is removed from the hole and the soil sample is disconnected from the probe pipe. The ends of the core are sealed using Teflon tape and plastic end caps. After all sampling is completed, the probe pipes are removed and the boring is grouted using Portland cement. The soil and groundwater samples will be packed in ice, and submitted under chain-of-custody to Sparger Technology, Inc. (Sparger), a state-certified Laboratory for analysis. Soil samples will be j classified at five-foot intervals and screened utilizing a photo-ionization(PID) meter. All fieldwork will be conducted according to the Apex Standard of Operating Procedures (SOP) included in Appendix A. Prior to drilling, the Underground Service Alert, USA, will be contacted for identification of buried utilities at or entering the project site from the public right-of-way. As a further precaution against probing into or through potential buried obstructions, the first five feet of each Geo Probe will be augured by hand. SOIL & GROUNDWATER SAMPLING Soil samples will be screened in the field for selection of the one bottom sample and the soil sample with the highest PID screening level. The soil and groundwater samples will be,submitted, under chain-of-custody, to a state-certified laboratory for analysis of a)TPH, as gasoline; TPH, as diesel by modified EPA Method 8015; b) BTEX and MTBE by EPA Method 8020. Due to the drilling method (Geo Probe) utilized for this investigation, soil cuttings are not generated; therefore, stockpiled soil and subsequent management are not anticipated at the site. Boring permits will be obtained from the County prior to the Geo Probe.sampling. Once the analytical data is received, a Results Report will be prepared documenting the results of this investigation.