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Kraus-Anderson Realty Company <br /> Project BL-11-01014 <br /> March 18, 2011 <br /> Page 8 <br /> Table 1.Anticipated Excavation Depths at Borings in or near Building Pad <br /> Anticipated Corresponding <br /> Soil Correction Elevation of Soil Depth Below FFE <br /> Surface Elevation Depth Correction of 968 <br /> Boring (feet MSL) (feet) (feet MSL) (feet MSL) <br /> ST-101 963.6 3 960 1/2 7 1/2 <br /> ST-103 966.6 4 962 1/2 5 1/2 <br /> ST-104 967.6 19 948 1/2 19 1/2 <br /> ST-105 966.1 19 947 21 <br /> ST-106 961.9 4 958 10 <br /> ST-107 965(estimated) 4 961(estimated) 7 <br /> ST-3* 964.5 4 960 1/2 7 1/2 <br /> ST-6* 961.5 1 960 1/2 7 1/2 <br /> ST-7* 965.1 1/2 964 1/2 3 1/2 <br /> ST-8* 967.3 1 1/2 966 2 <br /> *Boring performed during previous exploration. <br /> Note that Boring ST-104 was estimated to be about 30 to 40 feet south of the south corner of the east <br /> wing. Boring ST-104 encountered deep organic soils and we assume the poor soil conditions will <br /> encroach into the building pad and oversize areas. However, surrounding Borings ST-103 and ST-107 did <br /> not encounter the deep organic soil conditions. <br /> We also anticipate helical anchors will be installed for canopy footing support in the area of deep <br /> organics found in Boring ST-105.The above soil correction depth shown for Boring ST-105 would not be <br /> applicable if helical anchors are utilized. <br /> The actual depths of excavations needs to be determined in the field at the time of construction by a <br /> geotechnical engineer,or qualified representative. An experienced engineering technician should work <br /> closely with the excavating contractor during excavations to make the necessary field judgments <br /> regarding the suitability of the exposed soils and to determine the extent of fill and other unsuitable <br /> soils. <br /> To provide lateral support of the structural loads they will support,we recommend oversizing (widening) <br /> the excavations 1 foot horizontally beyond the footings for each foot the excavations extend below <br /> bottom-of-footing elevations. If the extent of the oversizing is verified by a surveyor prior to filling,the <br /> oversizing can be reduced to 1/2 to 1 (horizontal to vertical). <br /> BRAUN <br /> INTERTEC <br />