1136 GRAND AVE A&B 2016-01-01 MF Import

. �- {- April 23,2007 Mr. Scott Anderson L&A Job No. 6A 126 F�ge 5 should be preserved and maintained, and concentrated stormwater should not be discharged onto tLe adjacent steep slope or anywhem within the site. Storm runoff over impervious surfaces, such zs roofs and paved driveway should be captured with underground drain line systems tied to roof downspouts and by catch basins installed in paved driveway. Water collected into these underground drain lines should be tighdined to dischazge into a ncarby storm sew�er. Yard waste and spoil soils should not disposed of onto the slope. Exposed unpaved ground resultcd from construction activitics should be re-vegetated as soon as possible. If the above recommendations are implemented and observed during and afier construction, the erosion hazard of the site should be minimal. Seismic Hazard and Design Cansideration The Puget Sound region is in an active seismic zone. Thc subjcct site is undedain at shallow depth by very-dense fresh till soils oi very high sheaz strength. There is a lack of continuous, extensivc groundwater table at shallow depth under the site. The combination of lhe above makes it rather unlikely for scismic hazards, such as liquefaction or soil lateral spreading, to occur on the sitc during strong carthquakes. Therefore, the seismic ha�ard for the site should be mir,imal. The duplex building to be constructed on the site, however, should be designed ro withstand seismic forces induced by strong earthquakes. F3ased on the soil conditions cncountered by the test pits, it is our opinion that Seismic Use Group I and Site Class D should be used in the scismic design of the proposed residences in accordance with the 2003 International Building Codc (II3C). LIU & ASSOCIATES, INC.