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City of Santa Ana 7-Eleven Convenience Store and Service Station Project Mitigation Monitoring and Reporting Program FirstCarbon Solutions 9 Y:\Publications\Client (PN-JN)\0327\03270041\MMRP\03270041 City of Santa Ana 7-Eleven MMRP.docx Table 1 (cont.): 7-Eleven Convenience Store and Service Station Project Mitigation Monitoring and Reporting Program Mitigation Measures Method of Verification Timing of Verification Responsible for Verification Verification of Completion Date Initial used. Passive pressure can be computed using an allowable lateral pressure of 300 psf per foot of depth below the ground surface for level ground conditions. Reductions for sloping ground shall be made. The passive pressure can be increased by one-third when considering the total of all loads, including wind or seismic forces. The upper 1 foot of soil shall not be relied on for passive support unless the ground is covered with pavements or slabs. • Foundation Plan Review: A Geotechnical Engineer shall review the foundation plans to ascertain that the intent of the recommendations in this report has been implemented and that revised recommendations are not necessary as a result of changes after this report was completed. • Foundation Excavation Observations: A representative working under direct supervision of the Geotechnical Engineer shall observe the foundation excavations prior to forming or placing reinforcing steel. MM GEO-3: Slabs-On-Grade • Interior Slabs on Grade: The top 24 inches of material below interior concrete slabs-on-grade shall have an expansion index of 20 or less. The project structural engineer shall design the interior concrete slabs-on-grade floor. However, we recommend a minimum thickness of 5 inches. - A vapor barrier shall be placed beneath slabs where moisture sensitive floor coverings will be installed. If plastic is used, a minimum 10-mil is recommended. The plastic shall comply with ASTM E1745. Installation shall comply with ASTM E1643. Current construction practice typically includes placement of a 2-inch thick sand cushion between the bottom of the concrete slab and the moisture vapor retarder/barrier. This cushion can provide some protection Review and approval of construction plans and conduct on-site inspections Prior to and during construction City of Santa Ana 1-23