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FIELD EXPLORATION PROCEDURES <br /> The following paragraphs describe our procedures associated with the on-site subsurface <br /> explorations and field tests that we conducted for this project. Interpretive stratigraphic logs of <br /> our auger borings are enclosed in this appendix. Our scope of work did not include a precise <br /> survey of each exploration location. Instead, all horizontal positions were determined by pacing <br /> or taping distances from existing site features, and all depths were referenced to existing site <br /> grade. As such, the locations and depths given in the report text, shown on the report figures, <br /> and stated on the stratigraphic logs should be considered accurate only to the degree implied by <br /> our measuring methods. <br /> Auger Borings <br /> All borings were advanced with a hollow-stem auger, using a truck-mounted drill rig operated by <br /> an independent drilling firm (Environmental Drilling, Inc.)working under subcontract to Terracon. <br /> As each boring was completed, the borehole was backfilled with suitable materials and the <br /> surface was patched with asphalt or concrete. Excess soil cuttings were left on site in discreet <br /> locations. <br /> A geotechnical specialist from our firm continuously observed the borings, logged the <br /> subsurface conditions, and collected representative soil samples. Throughout the drilling <br /> operation, soil samples were obtained at 2'/2- or 5-foot depth intervals by means of the Standard <br /> Penetration Test (SPT) per ASTM: D-1586. All samples were stored in watertight containers <br /> and later transported to our laboratory for further visual examination. Interpretive stratigraphic <br /> logs of our explorations are enclosed in this appendix. <br /> 81135080 <br />