9423 EVERGREEN WAY 2018-01-01 MF Import

CASCADE TESTING LABC�RATORY. INC. TESTING !1 INSPLCTION / [NGIN[�RS / GLOLOGISTS December 16, 1981 Cert. No. 8112-13G Paper Warehouse Corporation Page 6 M with water, the sidewall soils may slough. It is important that the trench be kept pumped down at all times prior to backfilling. ! The trench should be backfilled with river run cobble or sound four ' (4) inch quarry rock. The backfilling may be performed in one lif-t, ( with the material keyed into place by hard t-amping with a backhoe bucke t. � The sump may continue to be utilized as a collection point for the Idiversion of surface runoff for the remainder of the earthwork. � Footing Areas To reduce the effects of potential differential settlements within the foundation area due to structural fill consolidation, all foot- ing areas not underlain by the Lootinq trenr.h should be overexca- vated a minimum of eighteen (18) inches below the base of footing or to the dense glacial till soil, which ever is greater. This excava- tion may be performed in conjunction with the subslab soil prepara- tion. To backfill the footing areas to the base cf footing eleva- tion, refer to the section on Structural Fill. Lean Mix Backfill As an alternative to placing footings on structural fill in conjunc- tion with the previously discussed Trench - Bacl:fill, a lean mix concrete may be utilized to transfer structural loads to suitable bearing soils. This may be accomplished in much the same manner as the "trench - backfill" sfstem as previously mentioned excepting that the trench should be a minimum of twenty-four (29) inches in width. All other recommendations should be complied with. This i