4102 RUCKER AVE SAFEWAY FUELING STATION 2016-01-01 MF Import

GEOTECHNICAL ENGINEERING STUDY Inform, Inc May 9, 2002 E-8493-5 Page 5 The presence of groundwater seepage should be expected in the excavation for the proposed underground storage tanks. ECI should review the underground storage tank design and assess the potential for uplift forces creatr�d by groundwater conditions. This report has been prepared for specific application to this project only and in a manner consistent with that level of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area for the exclusive use of Inform, Inc., and their representatives. No warrenty, expressed or implied, is made. This report, in its entirety, should be included in the project contract documents for the information of the contractor. Site Preparation and General Earthwork The site should be stripped and cleared of foundations, vegetation, and other deleterious material. Existing utility pipes to be abandoned should be plugged or removed so they do not provide a conduit for water and cause settlement problems. The existing asphalt pavements in the planned construction area should also be stripped. Outside of the construction areas, the existing pavement may be left in place to provide an all weather construction surface. The existing pavement outside construction areas may also be incorporated into the final pavement design, provided the pavement is in good condition. In areas where the pavement is stripped, it may be possible to crush the existing site pavements for use as structural fill materials. Materials reclaimed by crushing and used as fill should have a maximum size of four inches and should be mixed with a suitable pranular soil to provide a well-graded material. Following tlie stripping operation, the ground sur(ace where structural fill, foundations, or slabs are to be placed should be observed by a representative of ECI. Proofrolling may be necessary to identity soft or unstable areas. Proofrolling should be porformed under the observation of a representative ot ECI. Soil in loose or soft areas, if recompacted and still excessively yieldinp, should be overexcavated and replacad with structural fill to a depth that will provide a stable base beneath the peneral strucwral fill. The optional use of a c�eotextilo fabric placed direcUy on the overexcavated surface may help to bridge unstable areas. N nrcessary, ECI can provide recommendations (or geotextiles. fmlh C.�nsullnnl�. Int