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pal HWA GEOSCIENCES INC. <br /> IGen►erlruira1 Pa veinent Errgirrerring• Hydrogeology• Genenvirorurreutal • Inspection 6. Testing <br /> Exhibit A <br /> April 12, 2016 <br /> HWA Project No.2016-P044-21 <br /> City of Everett <br /> 3200 Cedar Street <br /> Everett, Washington 98201 <br /> Attention: Ed Fisher,P.E. <br /> Subject: Geotechnical Engineering Services <br /> Beverly Lake Sewer Improvements <br /> Everett,Washington <br /> Dear Ed: <br /> As requested,HWA GeoSciences Inc. (HWA)is pleased to present this scope of work to provide <br /> geotechnical engineering services for the assessment of the Beverly Lake Sewer Improvements <br /> in Everett,Washington. <br /> PROJECT UNDERSTANDING <br /> It is our understanding that the City of Everett would like to reconstruct portions of the sewer <br /> lines serving the apartment and condo buildings situated along the eastern end of Beverly Lake. <br /> We understand that the current sewer system consists of a series of gravity lines and associated <br /> manholes. A review of the geologic map of the area suggests that the Beverly Lake area is <br /> underlain by very dense glacial till soils. However,we expect that the near surface soils in the <br /> vicinity of Beverly Lake consist of soft and potentially compressible bog soil materials. This <br /> assumption is supported by the fact that consolidation settlement of the portions of the system, <br /> located near the edge of the lake,has occurred. Settlement of the system has resulted in the need <br /> for chronic maintenance of the system. We understand that the City has developed several <br /> possible improvement alternatives that could serve to alleviate the need to regular maintenance <br /> of the system. These alternatives include improvements such as changing the alignment of the <br /> utilities, adding lift stations and small grinder pumps to improve the functionality of the system. <br /> We understand that the City of Everett desires to evaluate the soil and slope <br /> conditions in the vicinity of the system to help in developing and designing a 21312 30th Drive SE <br /> preferred sewer improvement alternative. Suite 110 <br /> Bothell,WA 98021.7010 <br /> Tel: 425.774.0106 <br /> Fax: 425.774.2714 <br /> www.hwageo.comn <br />