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Nationwide Insurance - Center for Radiation Oncology, 7315 Green Slope Drive, Zephyrhills, FL . Lab N(i). 190442 Page 9 the foyer. This SPT boring encountered sandy soils to a depth of 2.8 feet. At 2.8 feet, firm clayey sands were encountered to a depth of 6.8 feet, followed by a medium dense sand layer to 9.0 feet. At 9.0 feet, stiff to very stiff clayey sands were found to 18 feet. At 18 feet, dense to medium dense silty sands were found to 32 feet. At 32 feet, stiff to very stiff clayey sands were found to 48 feet. At 48 feet, a raveled zone of soft clays was encountered to a depth of 61 feet. These raveled soils were soft to very soft and recorded drops of the drill rod plus the weight of the hammer under its own static weight (Weight-of-Hammer - WOH) at the 50 and 55-foot sampling intervals, and a drop of the drill rod under its own static weight (Weight-of-Rod - WOR) at 60 feet (totaling 12 inches). At 61 feet, very hard limestone was encountered in which the boring was terminated at 65.0 feet. There was a partial loss of drilling fluid circulation associated with the raveled zone at 51 feet followed by a complete circulation loss at the clay/rock interface at a depth of 61 feet. Boring B-2 was drilled on the east side of the building near the area of water intrusion in the simulation room and near older exterior cracking. This SPT boring encountered silty sands to 2.2 feet, followed by very stiff clayey sands to 6.3 feet. At 6.3 feet, medium dense silty sands were found to 9.0 feet, followed by stiff to very stiff clayey sands to 23.5 feet. At 23.5 feet, medium dense silty sands were found to 38 feet, followed by very stiff clays to 54 feet. At 54 feet, very hard limestone was encountered in which the boring was terminated at 60.0 feet. There was no loss of drilling fluid circulation in this boring. Boring B-3 was drilled on the north side of the building near northwest comer. This SPT boring encountered sandy soils to a depth of 2.8 feet. At 2.8 feet, stiff clayey sands were encountered to a depth of9.0 feet, followed by a medium dense sand layer to 12.0 feet. At 12.0 feet, stiff to hard clayey sands were found to 37 feet. At 37 feet, medium dense sands were found to 48 feet. At 48 feet, stiff to very stiff clayey sands were found to 56 feet. At 56 feet, an extensive raveled zone of very soft clays was encountered to a depth of 84.5 feet. These raveled soils were generally very soft and recorded a WOH drop of 2.0 feet at 60 feet, a WORfWOH drop totaling 8.0 feet at 70 feet and a WOR drop of 4.5 feet at 80 feet. At 84.5 feet, very hard limestone was encountered in which the boring was terminated at 85.0 feet. There was a complete loss of drilling fluid circulation associated with the top of the raveled zone at 56 feet. Boring B-4 was drilled on the south side of the building near the southwest comer. This SPT boring encountered sandy soils to a depth of 0.7 feet, followed by very stiff clayey sand to 6.7 feet. At 6.7 feet, slightly loose silty sands were found to 8.4 feet, followed by hard clayey sands to 18 feet. At 18 feet, dense to very dense sandy soils were found to 33 feet. At 33 feet, hard to very stiff clays were found to 62.5 feet. At 62.5 feet, very hard limestone was encountered in which the boring was terminated at a depth of 70.1 feet. There was a partial loss of drill fluid circulation at a depth of 54 feet, followed by a complete loss of circulation within the limestone at 70.1 feet. Laboratory Test Results Physical analyses were conducted on samples of the upper clayey soils found in both the hand auger borings and the SPT borings. The analyses of the samples consisted of Atterberg Limit tests according to ASTM D-4318 and sieve analyses per ASTM C-136. The results of the analyses are listed in the table below. Central Florida Testing Laboratories, Inc. 12625 - 40th Street North, Clearwater, FL 33762