3431 NASSAU ST 2018-01-02 MF Import

04/14/04 07:16 rj%X 4253476588 CnEA EVERM (it 01 3 /032 Geologic Jnyecuenrion alit (feoiechnica( k.-n¢ineerine Rviorr NE Corncr 35"' St. and Nass ut St. Everett. Washington 4.3 Structural Fill 00-02-20 Surfaces to receive structural fill should be graded to a level, flat plain — rolled and compacted to a non - yielding condition prior to placement of fill. Slopes receiving fill that are over 5A(H: j should be benched for preparation of fill placement. Benches should consist of no higher than four-(4) foot cuts on the upslope side and should be wide enough to allow for the passage of construction equipment such as dozers and compactors. We recommend that the prepared surface be approved as suitable by GES,Inc. prior to the placement of any structural fill. For most locations, on -site soil will not be suitable for use as fill and/or structural fill. Fill/structural fill should consist of well graded, free draining imported granular soil tree of organic and debris. GES, Inc. recommends utilizing imported gravel borrow or imported 1-1/2" minus etushed rock as structural fill/ fill on this site. The materials for gravel borrow spelled out in WSDOT Standard Specification section 9- 03.14, Grave/ Boti-oty, will meet the requirements except that the gradation should be as follows: Sicre:-Siyt PtGei%tijl¢, ,,, _ 4 inch 100 i; inch 25 to 75 No. 40 S';fo 25 No. 200 0 to 5 Structural fill should be placed in maximum eight-(S) inch loose, horizontal lifts rolled to a non -yielding condition, compacted to an uniform density of at least 95% of the modified proctor dry density (ASTM U-1557) value. 1-1/2" minus crushed rock should be placed in maximum 12" loose, horizontal lifts that are compacted to a non-vielding condition utilizing a roller or similar compactive equipment. Fill within five-(5) feet of site improvements, such as backfill of building foundations, should be placed using hand held vibratory plates oijutnning jack hand held compaction equipment. Periodic testing of all structural fill as it is being placed is recommended to ensure uniformity of placement and to help limit differential settlement potentials within the fill. The amount of testing and the timing of the testing should be discussed with and approved by GES, Inc. prior to the placement of any 9 GES, Inc.