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APPENDIX A. MITIGATION MONITORING AND REPORTING PLAN <br />Mitigation Leasure <br />the structures are supported on drilled pier foundations, which derive <br />support from the underlying native soils and bedrock. <br />c) All drilled pier foundations shall be designed for soil creep pressures. <br />d) Permanent drainage measures shall be installed on all lots to intercept <br />surface water infiltration and migrating subsurface water and thus <br />reduce the likelihood of soils becoming wet and unstable. <br />e) Drilled pier foundations shall be used for houses on sloping lots. <br />f) Detailed foundation explorations shall be performed for each lot during <br />the design -level geotechnical investigation to collect site-specific data <br />regarding slope creep, expansive soils, and serpentinite rock. <br />g) Garage slabs on grade, driveways, walkways, sidewalks, and pavers <br />shall have sufficient reinforcement and be supported on a layer of non - <br />expansive fill. <br />h) All residences, retaining walls, and bio -retention basins shall be <br />supported on drilled, cast -in-place, straight -shaft friction piers or similar <br />construction. Consideration shall be given on a case-by-case basis to <br />the need for extra steel reinforcement of the piers and grade beams, <br />voids beneath grade beams to mitigate uplift distress to the structures, <br />perimeter subdrains and moisture barriers, and construction <br />precautions for concrete over -pours at the tops of the drilled piers. <br />i) Proper detailing of construction and control joints for concrete slabs <br />shall be considered in the final design of sidewalks and patios in areas <br />of expansive soils. For example, a construction joint with rebar dowels <br />may be provided when concrete slabs on grade meet the proposed <br />perimeter foundation for the residence to minimize vertical offset from <br />soil expansion or shrinkage. <br />.j) A detailed creek bank evaluation shall be performed during the final <br />geotechnical investigation once grading and improvement plans are <br />available. <br />k) The design -level geotechnical investigation for Lot 13 and all lots along <br />the downhill side of Laurel Way shall evaluate the potential for creek <br />bank erosion or landsliding, and provide mitigation measures as <br />appropriate. <br />1) All proposed structures and improvements shall be set ei <br />Impiemerltat+enl Monitoring Entity ImpJamentat3orr <br />Monitoring A tRhod Schedule <br />construction activities <br />040 <br />v <br />cc <br />m <br />00 <br />CIO <br />A-14 Laurel Way Planned Development Revised Final EIR <br />February 2013 <br />