3611 FEDERAL AVE 2018-01-02 MF Import

Geologic Imesti¢ation and Geatechnical F_npineerinQ Report .Jones Residence 3611 Federal Ave. Everett, Washinghw 98-08-10 gradation requirements and placement recommendations for structural fill. Structural fill and/or any site improvements should only be placed upon an approved subgrade surface as confirmed by GES, Inc. 4.3 Structural Fill Based on the supplied site plans, the placement of structural fill should be limited to below the parking areas, driveway areas, behind foundation walls and to below slabs on grade around this site. The use of structural fill will be primarily for achieving the design grades once the site has been cleared, grubbed and the top soil unit removed. Surfaces to receive structural fill should be graded to a level Flat plain, rolled and compacted to a non -yielding condition as outlined in section 4.2 above. We recommend that the prepared surface be approved by GES, Inc. as suitable to receive fill prior to the placement of any structural till. Structural fill placed on this site should consist of imported granular soil. 2" minus crushed rock, similar to that provided by Iron Mtn. Quarry in Granite Falls, will meet all requirements for imported granular till on this site. Alternately, the materials for gravel borrow spelled out in WSDOT Standard Specification section 9-03.14, Gravel Borrow, will meet the requirements except that the gradation should be as follows Sieve Size Percent Passing by Weight 4 inch 100 — !% inch 25 W 75 No, 40 5 to 25 No. 200 O to'5 Imported gravel borrow fill should be placed in maximum eight-(8) inch loose, horizontal lifts rolled to a non -yielding condition, compacted to a uniform density of at least 95% of the Modified Proctor dry density (ASIA4 U-1557) value. 2" minus crushed rock should be placed in maximum twelve-(12) inch loose, 9 GES, Inc.