12906 19TH AVE SE FRED MEYER FUELING STATION 2018-01-02 MF Import

Geoiechnical Engineering Report 3 June 27, 2008 Fred Meyer Fueling Facility Project 92008-217 Enerelt IVA 4.0 DISCUSSION AND RIECOM MGNDATIONS 4.1 General based on our study, the site is suitable lbr the proposed development from a geotechnical standpoint. The proposed fiteling litcility (canopy and kiosk) can be supported on either perimeter wall or slab -on -grade bearing on existing fill or native soil. Pavement can be similarly supported. Detailed recommendations regarding the above issues and other geotechnical design considerations are provided in the following sections. 'these recommendations should be incorporated into the final design drawings and construction specifications. 4.2 Site Preparation and Gradint To prepare the site for construction, surface stripping depth up to 12 inches should be expected to remove the asphalt pavement. All remnants related to previous construction, which occupied the proposed development area, should also be cleared and removed from the site. Once clearing and other preparing operations are complete, cuts and fills can be made to establish desire grades. The on -site excavated soils are generally suitable for being used as structural fill if soil's moisture can be properly controlled. If the site grading requires additional structural fill material, we recommend importing a material that meets the lollowing grading requirements: U.S. Sieve Size Percent Passing 3 inches 100 percent No.4 sieve 0 to 75 percent No. 200 sieve 0 to 5 percent * *Bused on minus 314 inch liaction. Prior to use, Riley should examine and test all materials imported to the site i'or use as structural fill. Structural fill materials should be placed in uniform loose pryers not exceeding 12 inches and compacted to a minimum of 95 percent of the soil's maximum density, as determined by ASTM Test Designation D-1557 (Modified Proctor) until the desired finished grade is met. The moisture content of the soil at the time of compaction should be within about two percent of its optimum, as determined by this ASTM method. 4.3 Excavations Excavations al the site, such as for the USTs, pump island dispensers, utility and piping trenches, unist be completed in accordance with the applicable Occupational Safety and The Riley Group, lnc.