2824 GRAND AVE NAUTICA CONDOMINIUMS 2018-01-02 MF Import

GEOTECHNICAL ENGINEERING STUDY E-8602 Cascasia Pacific Properties, Ltd. Page 3 July 15, 1999 Subsurface The site was explored by drilling two borings and excavating six test pits at the approximate locations shown on the Boring and Test Pit Location Plan (Plate 2). Please refer to the boring and test pit logs included in Appendix A for a more detailed description of the conditions encountered at each location explored. The following is a generalized description of the subsurface conditions encountered. Medium dense to very dense sand and silty sand soil conditions were generally observed at the boring and test pit locations. The medium dense to dense soil conditions were observed below a depth of approximately five feet, with the exception of Boring B-2, where medium dense to dense soils were observed below a depth of approximately ten feet. At test pit location TP-2, brick and concrete rubble fill was encountered to a depth of approximately three feet below the existing ground sur,ace elevation. Some of the concrete rubble observed was twenty-four (24) inches to thirty-six (36) inches in size. Groundwater At the test pit locations, light groundwater seepage was observed at depths of approximately seven feet to ten feet below the existing ground surface. At the boring locations, noticeable groundwater seepag was observed at a depth of approximately twenty (20) feet. Groundwater seepage levels and the rate of seepage are not static, and fluctuations in the level and rates can be expected depending on the season, amount of rainfall, surface water runoff, and other factors. Generally, the level and rate of seepage is higher in the wetter winter months (typically October through May). The presence of groundwater seepage should be expected in the deeper excavations planned for the development. We do not anticipate the rate of groundwater seepage in the building excavation will be heavy. The contractor, however, should be prepared to intercept groundwater seepage in the event seepage conditions are encountered. The use of sumps during construction may be necessary if groundwater seepage into the excavation or utility trench excavations becomes excessive. E,mh Con.uHutts, Inc.