10200 19TH AVE SE Geotech Report 2018-01-02 MF Import

recom:nend that a pzrimeter feoting drain systen be instalied because of the pouibility of seasonally perched ground water conditions at the sit�. We recommend that all roof drains be connecced to tightlines to divert rainwater to the storm Jrain system. Drainage of the p:ivement base course and subUace will decrease the risk of pavement distress. Small holes can be pmvided in that portion of catch basins adjacent to the subbase or base layer, provided that;he expected water level within the catch bacin will a:ways be below the e]evation of the holes. Tha holes should be wvered with a saitable geoteztile fabric placed xgainst the ouuide of the catch bazin to prevent pipinA of the subbaze or base material into the catch basin. SEISMICIT! 11�e: Puget :Sound region is seismically acNve and lies within Seumic Risk Zone 3 az clacsified by the Uniform Building Code ¢CBO 1991). As defined in the L'niform Building �a3e, the project site i� classified at Soil Profile Typt S2. LIMITATIONS We have prepazed this report for use by Costco Wholrsale, the Mulvanny Partnership and the design team in design of a portion of this project. 1'he data and report should be provided ta prospective conVacturs for their bidding or estirc,atine putposes, but our report, conclusions and interpretations should nut be cnnstrued ac a wazranty of subsurface cc�nditions. If there are changes in the grades, location, configuration or type of construction for die building, the waclusions and recommendations presented may not be applicable. If design changes aze made, we request that we be given the opportunity to review our conclusions and recommendations and to provide a written modification or verificatien. When the design has been finalized, we should be retained to review the appropriate portions of the drawings and specifications: ro see that our recommendations have been interpreted and implemented as intended. The scope of our services does not include services relateA to constructiun safety precautions and our recommendations are not intended to direct the contractor's methods, techniques, sequences or procedures, except as specifically describzd in our report .`or consideration in design. There aze probable vaziations in subsurface conditions between the enplorations and also that may occur with time. A contingency for unanticipated conditions should be includad in the budget and schedule. Su�cient monitoring, testir,g and consultation by our firm should be provided during conswction to cor.firm that the conditions encountered are consistent with tho�e indicate� hy the explorar'ons, to provide re�ortvnendations for design changes if the conditions revealett during construction differ from those anticipated,and to r.valuate whether earthwork and foundation installation activities cumply with contract plant and specifications. G e o E n g i n a e r s IO File No.0975-017-R93/061993