2802 HOYT AVE EVERETT ELKS Geotech Report 2018-01-02 MF Import

Geotechnical-Engineering Evaluation Everett Elks Club November 2, 2006 NGA File No. 751106 Page 12 Fill Placement: Following subgrade preparation, placement of structural fill may proceed. All filling should be accomplished in uniform lifts up to eight'nches thick. Each lift should be spread evenly and be thoroughly compacted prior to placement of subsequent lifts. All structural fill underlying building areas and pavement subgrade should be compacted to a minimum of 95 percent of its maximum dry density. Maximum dry (tensity, in this report, refers to that density as determined by the ASTM D-1557 Compaction Test procedure. The moisture content of the soils to be compacted should be within about two percent of optimum so that a readily compactible condition exists. It may be necessary to over - excavate and remove wet soils in cases where drying to a compactible condition is not feasible. All compaction should be accomplished by equipment of a type and size sufficient to attain the desired degree of compaction. Slab -an -Grade e soils prepared as described in the Site Preparation and Slabs -on -grade should he suppored on subgrad end that all door slabs for the building be underlain by at Grading subsection of this report. We recomm least six inches of free -draining sand or gravel for use as a capillary break. We recommend that the capillary break be hydraulically connected to the footing drain system to allow free drainage from under the slab. A suitable vapor barrier, such as heavy plastic sheeting (6-ntil minimum), should be placed over the capillary break material. Site Drainage Surface Drainage:'Ilie finished ground surface should be graded such that stormwater is directed to an appropriate stormwater collection system. Water should not be allowed to stand in any area where footings or slabs are to be constructed. Final site grades should allow for drainage away from the structure. We suggest that the finished ground be sloped at a minimum gradient of three percent, for a distance of at least 10 feet away from the structures. Surface water should be collected by permanent catch basins and drain lines, and be discharged into an appropriate discharge system. Subsurface Drainage: Groundwater was not encountered in the borings, however, if groundwater is encountered during construction. we recommend that the contractor slope the bottom of the excavation and collect the water into ditches and small sump pus where the water can be pumped out of the zxcavation and routed into a permanent storm drain. Chronic water seepage conditions may be controlled NELSON GEOTECHNICAL ASSOCIATES, ANC. NC.