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Site <br /> N, <br /> A site survey will be performed for the purposes of obtaining a 3 <br /> detailed and scaled drawing. The drawing will be used to accurately <br /> locate sampling locations. The survey will also determine the <br /> volume of the excavation as well as the volume of the excavated soil <br /> and identify physical constraints to excavation and remediation. <br /> ton <br /> Five soil borings will be installed around the perimeter of the existing <br /> excavation as shown in Figure 2-1. Two of the borings will be <br /> installed on the northeast side of the excavation close to former ii <br /> sampling location S6. These borings will be placed 5 feet from the '' <br /> edge of the excavation and will be advanced to the first unconfined 1' <br /> groundwater. One of the borings will be installed on the west side of <br /> { the excavation along the property line to determine if contaminants �! <br /> have migrated beyond former sampling location S3. The other two <br /> borings will be installed 5 feet from the edge of the excavation ; <br /> { adjacent to former sampling locations S1 and S2. Additional borings <br /> may be installed depending on the findings of these five initial <br /> borings. Where contamination has been confirmed by visual <br /> staining, odor, or analytical results, additional borings will be <br /> advanced radially outward from the edge of the excavation until <br /> clean soil is founds. All borings will be installed using a mobile truck <br /> mounted drill rig using hollow stem augers. The soils from the <br /> borings will be logged according to the Unified Soil Classification <br /> System (Appendix B). The drilling logs will be based on information <br /> obtained from drill cuttings, actual soil samples, and changes in j <br /> drilling characteristics. Locations of utilities on the former tank site <br /> will be identified prior to proceeding with the soil investigation. <br /> All borings will be advanced to the depth of the first encountered !a <br /> unconfined groundwater. In addition, groundwater samples will be <br /> collected from selected borings using a modified hydropunch (See <br /> section "Groundwater Sample Collection"). ' <br /> A single boring will be advanced to approximately 75' in a confirmed <br /> clean zone in order to determine stratigraphy of the first unconfined <br />' aquifer and the presence of any underlying clay layers or additional ' <br /> intermediate aquifers. This information will be important for 21 <br /> estimating flow characteristics of the first unconfined water, and any <br /> possible hydraulic communication with underlying water bearing <br /> formations. <br /> 1 All soil borings will be installed on Marina Pro's property. No borings will be <br /> advanced beyond the boundaries of the Manna Pro facility property without prior <br /> approval from the appropriate property owner(s). <br /> If <br /> f 2-2 <br /> L : <br />