711 112TH ST SE 7 ELEVEN Geotech Report 2018-01-02 MF Import

Snbsurfacc Ezplormian and Proposed 7-Eleven Properry Georechnical Engineertng Repon Everctt, lYashinRron DeriRn RecammenJarions Final exterior grades should promotc positive drainage away from the building areas at all times. Water must not be allowed to pond or to cc'lect adjacent to foundations or within the immediate building areas. It is recommended th �t a gradient of at least 3 percent for a minimum distance of 10. feet from the b�ilding perimeter be pro�•ided, e�cept in paved locations. in paved locations, a minimum gradient of 1 perc:vt should be provided u►iless provisions are included for collection and disposal of surface warer adjaceu� to the structure. 11.0 FLOOR SLAB SUPPORT We understand that the finished floor clevation for the 7-Eleven building will be close to (within 1 foot o� the existing grades and that a slab-on-grade Floor will be utilized. Provided the finished Floor is within 1 fout of existing grade and that some minor, long-term cracking and/or localized settlement of the Floors is tolerablc, they may be cast over a prepared subgrade as described in the Site Preparation section. If the potential for setdement-related cracking is not tolerable, a strucmral Floor tied to the foundation walls or supporred by piles or piers is recommended. After the slab subgrade is completed and approvcd, tlie Floors should be cast arop a minimum of 4 inches of pea gravel to act as a capillary break where moisture migration through the slab is to be controlled. The Flaors should also be protected fiom dampness by a minimum 6-mil- thick plastic moisture barrier, placed over the capillary break material. In addition, it is recommended that a minimum ol 2 inches of clean sand cover the moisture barrier to protect die integrity of the barrier during concrete placement and to aid in the curing of the concrete. 12.0 PROJECT DESIGN AND CONSTRUCTION MOMTORING We are available to provide additional geotechnical consultation as the project design develops and possibly changes from that upon which this report is based. We recommend that AESI perform a geotechnical review of the plans prior to final design completion. In this way, our earthaork, foundation, and drainagc recommendations may be properly interpreted and implemented in the design. This review is not included in the current scope of work or budget. ' We are also available to provide georechnical engineering and monitoring services during construction. The integriry of the foundation depenJs on uroper site preparation and construction procedures. In addition, engineering decisions may have 10 be made in the field in the event that vz: iations in subsurface conditions become apparent. Construction monitoring hlarrh 19, 1001 ASSOCIATED EAR77! SGENC£S sxf��, nr:aav�e�r-nnrr„�Jni-n:e• Page 13 l5�