2222 EVERETT AVE 2016-01-01 MF Import

' Subsurface Ezploration, Geologic Hazard, and Everett School Disrricr Mniuterranrc Facifiry Preliminary Geotechnica[Engineenng Repon Everett, Washingmn Design Recommendations � thicker plastic moisture barrier on top of the capillary break. In addition, it is recommended that a minimum of 2 inches of cican sand cover the moisture barrier to protect the integriry of the moisture barrier during concrete placement, and ro aid in the curing of the concrete. Floors conswcted over a crawl space should have a vapor barrier placed over the surface of the soil in the crawl space and should be adequatel} vented per the UBC and local building codes. 13.0 DRAINAGE CONSIUGkATIONS All retaining and perimeter footing walls should be provided with a drain at the footing elevation. Drains should consist oF rigid, perforated, PVC pipe surrounded by pea gravel or �vashed rock. The level of the perforations in the pipe should be set approximately 2 inchcs below the bottom of the footing and the drains should be constructed with sufficicnt gradient to allow gravity discharge awa� from the building. In addition, all retaining walls should be lined with a minimum 1-foot-��•ide imported, washed gravel blanket drain, a Mira-Drain 6000 drainage mat, or equivalent for the full wall height (excluding the upper 1 foot). The wall drain should tie into the foutine drain. Roof and surface runoff sUould not discharge intn the footing drain system but should be handled by a separate, rigid tighdine drain. In planning, exterior grades adjacent to �calls should be sloped downward away from the structure to r achieve surface draina��c. � 14.0 PROJECT DESIGN A�'U CONSTRUCTION MONITORING At the time of this report, site grading, structural plans, and construction methods have not been finalized and the recommendations presented herein aze preliminary. We are available to provide additional geotcchnical consultation as the project design develops and possibly changes from dtat 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 e�rthwork and foundation recommendations may be properly interpreted and implemented in the desicn. We are also availablc ro provide geotedmical engineering and monitoring scrvices during construction. The integrity of the foundation depends on proper site preparation and construction proceduras. In addition, engineering decisions may have to be made in the field in the event that variations in subsurface conditions become apparent. Construction monitoring services are not part of this curren� scope of work. [f Uiese services are desired, please let us I:now znd we will prcpare a cost propusal. ( May 1, 2001 A.SSOCIATED F.�RTH SCIENCES, /NC. mam-nFaosu��o:i�yi�,i,m-�v�x Page 13 15