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Report of Geotechnical Exploration November 7, 2014 <br />Samson Oceanfront Park AREHNA Project B-14-124  <br /> <br /> <br />9 | Page <br /> A materials testing laboratory should be retained to provide on-site observation of <br />earthwork and ground modification activities. Density tests should be performed in <br />the top one foot of compacted existing ground, in each fill lift, and at the bottom of <br />foundation excavations and in each foot of backfill. <br />6.2 Ground Water Control <br /> <br />Depending upon the seasonal conditions, runoff from adjoined sites and pavements may cause significant <br />surface water until drainage structures are emplaced. Soils exposed in the bases of all satisfactory <br />foundation excavations should be protected against any detrimental change in conditions, such as physical <br />disturbance or rain. Surface run-off water should be drained away from the excavations and not be <br />allowed to pond. <br /> <br />6.3 On-Site Soil Suitability <br /> <br />Suitable structural fill materials should consist of fine to medium sand with less than 12 percent passing the <br />No. 200 sieve and be free of rubble, organics, clay, debris and other unsuitable material. The upper fine <br />sand (SP) found in the borings is considered suitable for structural fill. Any off-site materials used as fill <br />should be approved by AREHNA prior to acquisition. <br /> <br />