3620 36TH PL NE 2018-01-02 MF Import

} southwest area) and if the estimated preload time is problematic to the construction schedule. We can provide specific surcharge recommendations if the preload time must be shortened. We have also estimated the long-term settlement for the structures that will be constructed as part of the compost facility. The long-term settlement estimates assume that the site grading fill and preload ( settlements are achieved prior to the construction and loading of planned structures. We estimate that post -construction settlements of footings and slabs will range up to 1-inch. Differential settlement between similarly loaded footings should be on the order of %,-inch. These long-term estimated settlements are based on the preloads being left on the site long enough to substantially complete the consolidation process for each structure. I 4.3.3 Settlement Monitoring In order to evaluate the magnitude and time rate of settlement of the site fill or the preload fill, we recommend that settlement monitoring plates be installed prior to placing the preload fill. For the buildings, one settlement plate should be placed approximately at the one-third points of the building lengths (two total). A minimum of six settlement plates should be placed in each compost system pad, four approximattly 25 feet from the corners of the preload fill and two near the middle portion of the preload. A detail of a typical settlement plate is shown in Figure 5. If a settlement plate is damaged, it should be repaired and resurveyed immediately. Plate elevations should be referenced to a stable benchmark, away from the influence of the preload or any fill placed at 1 !I the site. The settlement data should be provided to the geotechnical engineer immediately after the I readings are taken so that we may review and comment as appropriate. Initial elevation readings of the settlement plates must be obtained when they are installed and before any fill is placed —site fill or preload fill. If this is not done, the initial settlement behavior of the preload fill- will not be recorded and the total magnitudes of settlement and rate of settlement will be unknown. The elevations of the plates and the adjacent ground surface should be measured twice weekly during fill placement and once a week after completion of filling so that settlement progress in relation to the amount of fill in place can be observed. Measurement rods that extend from the settlement plates through the fill will inhibit the mobility of ! earthmoving equipment to some extent. 'he contractor will have to exercise care to avoid damaging the 1 rods. The construction documents should emphasize the importance of protecting the settlement plates and measuring rods from disturbance. 4.4 SHALLOW FOUNDATIONS 4.4.1 General ( We understand the tipping building, office building, scales, and the compost system retaining walls will be supported on shallow foundations. These proposed structures may be supported on shallow foundations provided the recommendations described in this report with respect to settlement and preload �. loadings are incorporated in the design and operation of the proposed facility. The site is underlain by compressible organic soils. Excessive settlement may occur under the following conditions: t• Unanticipated surcharge loads are placed in the vicinity of the shallow foundations, • The footings are not founded on the recommended thickness of compacted structural fill, and/or • The foundation areas are not pre -loaded as recommended. ( G c o E n g i n e c r s 16 File No. 10625-001-021123003