2825 COLBY AVE COLBY CENTER Geotech Report 2018-01-02 MF Import

APPENDIX A FIELD EXPLORATION E-6225 Our field exploration was performed on July 1, 1993. Subsurface conditions at the sfte were explored by drilling one boring to a maximum depth of thirty-nine (39) feet below ,.. the existing site grades. The borings were drilled using Mobile B-61 Mobile drili rig. Continuous-flight, hollow-stem augers were used to advance and support the boreholes during sampling. The approximate boring location was determined by taping from the northwest property corner. The boring elevation was deterrriined using a level and rod relative to an assumed —' elevation of 0.00 feet at the level of the adjar,ent existing side walk. The location and elevation of the boring should be considered accurate only to the degree implied by the method used. These approximate locations are shown on the Boring Location Plan, -' PISte 2. The field exploration was continuously mo�itored by a engineer from our firm who - classified the soils enc�untered, maintained a log of the boring, obtained representative ,�. samples, measured groundwater levels, and observed pertinent site features. All samples were visually classified in accordance with the Unified Soil Classification System which '� is presented on Piate A1, Legend. � In the boring, Standard Penetration Tests (SPT') were performed at selected intervals in general accordance with ASTWI Test Designation D-1586. The split spoon samples were driven with a one hundred forry (140) pound hammer freely falling thirry (30) inches. The number of blows required to drive the last twe6ve (12) inches of penetration are called the � � "N-value". This value helps to characterize the site soils and is used in our engineering � analyses. Shear strengths af undisturbed soils were measured wherP Fractical in the field with a penetrometer. These results are recorded on the boring log at the appropriate Isample depths. Representative soil samples were placed in closed containers and returned ' to our laboratory for further examination and testing. IA logs of the boring is presented on Piate A2. The final log represent our interpretations - of the field iog and the resuits of the laboratory ex�mination and tests of field samples. I The stratification lines on the log represent the approximate I�oundaries between soii types. In actuality, the transitions may be more graduai. I I IEarlh Consultants, Inc.