1212 GRAND AVE 2016-01-01 MF Import

March 31, 2008 Mr. Paul Tessier L&A Job No. 8A027 Page 6 maintained, and wncentrated stortnwater should not be discharged uncontrolled onto the steep � slope or anywhere within the site. Storm runofl over impervious surfaces, such as 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 coliected into these underground drain lines should be tightlineJ to discharge into a nearby storm sewer. Yazd wnste and spoil soils should not disposcd of onto the stcep slope. Exposed unpaved ground resulted from construction activitics should be re-vegetatcd as soon as possible. If the above recommendations are implemented and observed during and afler constructi��n, the crosion hazard of the site should be minimal. SEISMIC HAZARU AND DESICN CONSIDERATIONS The Puget Sound region is in an active seismic zone. Thc subject site is undcrlain at shallow depth by densc sand and hard silt soils of high shear strength. There is a lack of continuous, extensive groundwatcr table at shallow depth under the site. Thc combination oC the above should makc it rathcr unlikcly for scismic hauuds, such as liqucfaction or soil lateral sprcading, to occur on the site during strong earlhyuakcs. "Cherefore, the seismic hazard for the si►e should bc minimal. 7'hc proposed additions and ncw garage should, however, be designed to withstand scismic forces induced by strong earthquakes. Based on the soil conditions encountered by the test pits, it is our opinion that Scismic Use Gtoup 1 and Site Class D should be used in the seismic dcsign of lhe proposed residences in accordance with the 2003 International Building Codc (IBC). SITF. PREI'ARATION ANll GENERAL GRADING Sitc prcparation should includc cicaring and grubbing within construction limits of the additions and ncw garaga Surticial topsoil and wcak soils in thc root zonc should bc stripped down to LlU & ASSOCIATES, [NC. �- ;,