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

Geotechnical Engineering Heparl 5 June 17. 2008 Fred Meyer Fueling Facilio, project 111005-117 For the anticipated floor slab loading, we estimate post -construction floor settlements of /a- to %:-inch. 4.6 Drainattc I-inal exterior grades should promote free and positive drainage away rronn building. Water must not pond or collect adjacent to kiosk or within the immediate canopy area. We recommend providing a minimum drainage gradient of i% for a minimum distance of 10 feet from the canopy perimeter, except in pawed locations. In paved locations, a minimum gradient of 1% should be provided unless provisions are included for collection and disposal of surface water adjacent to the structure. 4.7 Utilities Utilily pipes should be bedded and backfilled in accordance with American Public Works Association (APWA) specifications. For site utilities located v ]thin the City of Everett or Snohomish County right-of-ways, bedding and buckfill should be completed in accordance with City of Everett or Snohomish County specifications. The trench backlill should be placed and compacted as structural fill, as described in the Site Prcparation and Grading section. Where utilities occur below unimproved areas, the degree ol'compact ion can be reduced to a minimum of 90 percent of the soil's maximum density as determined by the referenced ASTM standard. As noted, soils excavated on -site will generally be suitable for use as backlill material if soil's moisture can be properly controlled. Product and vent piping trenches should be sloped, bedded, and backfilled in accordance with the APl specifications. 4.8 Pavements Pavement subgrade should be prepared as described in the Site Preparation aid Grading section of this report and as discussed below. Regardless of the relative compaction achieved, the subgrade must be firm and relatively unyielding before paving. This condition should be verified by proof -rolling with construction equipment or hand probe by inspector. Based on our Geld exploration, the existing parking lot pavement consists of 10 inches of asphalt over native soil or strucnural till without crushed rock base (CRE). 71ic pavement seems to be in acceptable condition. The future pavement can match this pavement section. If this pavement will be used, Riley recommends that the navcnient section consist of 4 inches of asphalt concrete (AC) over G inches of asphalt treated base (ATE). CRB will not used. Alternatively, regular flexible pavement with CR13 can be used. With the pavement subgrade prepared as described above, the following pavement sections are recommended: The Riley Group, Inc.