1303 W MUKILTEO BLVD 2016-01-01 MF Import

� r U r u ►J r-. Report Short Plat May 4, 1990 Page 6 pennanent drainage systems should be installed for snbgrade �salls. We recommend that these drainage systans consist of 18 inches of clean pess that 3 percr.nt fines), frae-draining grana�ar material placed along the back of the wail. The granulaz material should be placal up the back of �he wall to within 1 foot of the ground surface. A less permeable soil should be placed in the last one foot. I recommend that a fine pea gravei be use� for the drain material, consldering the type of native soil expected on site. Slotted drainpipe having a minimum diameter of 4 inch� S a� p,pe shou d within the grannlar material at the base of ihe wall alon8 rts entire length. discharge into tight lines lead'►ng to appropriate collection and disposal systems. . Roof dcains should be con�ecced to a tight line systen. 'ndependent from the subgrade wa11 drain. 'Ibe ground surface ad]acent to the building should be sloped so that surface runoff flows away from . the structure. ■ � � � � � � � USE OF THIS REYORT This re�ort 6as been written for Mr. Dell Russell and Mr. Cliarles Gilkey for their use on a portion of this P%jecc• 'me data a"d report should be provided to prospeccive conuactors' for their bidding or estimarinB PuiF°Ses� but my report, conclusions and interpretations should not be construad u a wamnty uf the subsurface conditions. The scope of my services does not include services related co conswction safety Precautions, and my recommendations are not intended to direct the convactoo m��s, t�Nqu�s� sequences or procadures, except as specially described in my � consideracion in design. � -�,�-: ssible. I recommend thac I f: Subsurface c.onditions other than those discussed could be po �.t�sined during coostruc�on to evaluate soil or groundwater conditions exposed and to provide ;r��endations should conditions differ from what is in this report. ` .�.� �.� �t�-' 'Ibe actual design of the swctures or improvements were not available at the time this repoet �,P. �fications W detern�ine If pas written. 1 recortu�end that I be retained to review the final plans and sP� - ' �! �e design is in conformance with my recommendations. . . . �'t , ,•..,: _ '� ^ serv�ces have been executed ia �yrthin the limitations of scope, schedule and budgec, mY rt W� Prepazed• No other accordance with generally accepted practices in this area at the time the repo conditions, ezpress or implied, should be understood. C�UVREiTE GEO'fECi�l�� G�ERING