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