1530 51ST PL SW 2016-01-01 MF Import

Geotechnical Engineenng Evalw .n Lettcr Mosman Basement Everett, Wazhington NGA File No. 886013 December 17, 2013 Page 1 l convenient cleanouts to prolong the useful life of the drains. Roof drains should not be connected to wall or tooting drains. We also recommend that all residence downspouu and yard drains be investigated to understand where they are directed. At a minimum, we recommend that al! residence downspouts and yard drdins be tightlined and directed to discharge to a suitable dischargc location. USE OF THIS LETTER NGA has prepared this letter for Ms. Ruth Mosmao and her agents for use in the planning and design the improvements of planned on this site only. 'I'he scope of our work dnes not include services related to construction saft�ty precautions and our recommencxtions are not intended to direct the contractors' methods, techniques, sequenecs, or procedures, except as specifically described in our letter for consideration in design. Therc are possible variations in subsurfacc conditions between d�e exptorations and also with time. Our letter, conclusions, and interpretations should not be construed as a warranty of subsurface conditions. A contingency for unanticipated conditions should be included in the budget and schedule. We recommend that NGA be retained to p;ovide monitoring and consultatiou services during conswction to confirtn that the conditions encountcred are consistent with those indicated by thc explorations, to provide recommendations for design changes should the conditions rcvea!ed during the work differ from those anticipated, and to evaluate whether or noi earthwork and (oundation inslallation activitics comply with contract plans and specifications. We should be contactcd a minimum of one weck prior to constn�etion activitics and could attend pre-construction mcelings if requested. Within thc limitations of scope, schcdule, and budget, our services have bccn performed in accordanra with generally acceptcd geotechnical enginecring practices in effect in this arca at the time this Ictter was prepared. No other warranty, expresscd or implied, is made. Our observations, findings, and opinions are a means to identify and reduce the inherent risks to the owner. �•. NELSON GEOTECHNICAL ASSOCIATES, INC.