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City of Santa Ana <br />7-Eleven Convenience Store and Service Station Project <br />Mitigation Monitoring and Reporting Program <br />Table 1 (cont.): 7-Eleven Convenience Store and Service Station Project Mitigation Monitoring and Reporting Program <br />Mitigation Measures <br />Braced Shoring System: For braced shoring above the <br />groundwater level, a uniform rectangular pressure distribution <br />shall be used from top to bottom of the shoring equivalent to <br />the following, Bracing: 30H pounds per square foot (psf)/feet <br />where H is the depth of the excavation, in feet. The earth <br />pressures indicated above do not include a safety factor; <br />therefore, the shoring design shall include an appropriate <br />safety factor for the overall performance of the system. <br />Surface Drainage: Final surface grades around structures <br />shall be designed to collect and direct surface water away <br />from the structure and toward appropriate drainage <br />facilities. The ground around the structure shall be graded so <br />that surface water flows rapidly away from the structure <br />without ponding. In general, we recommend that the ground <br />adjacent to the structure slope away at a gradient of at least <br />2 percent. Densely vegetated areas where runoff can be <br />impaired shall have a minimum gradient of at least 5 percent <br />within the first 5 feet from the structure. Roof gutters with <br />downspouts that discharge directly into a closed drainage <br />system are recommended on structures. Drainage patterns <br />established at the time of fine grading shall be maintained <br />throughout the life of the proposed structures. Site irrigation <br />shall be limited to the minimum necessary to sustain <br />landscape growth. Shall excessive irrigation, impaired <br />drainage, or unusually high rainfall occur, saturated zones of <br />perched groundwater can develop. <br />Grading Plan Review: A Geotechnical Engineer shall review <br />the grading plans and earthwork specifications to ascertain <br />whether the intent of the recommendations contained in <br />this report have been implemented, and that no revised <br />recommendations are needed due to changes in the <br />development scheme. <br />FirstCarbon Solutions <br />Y:\Publications\Client(PN-1N)\0327\03270041\MMRP\03270041 City of Santa Ana 7-Eleven MMRP.docx <br />Verification of Completion <br />Responsible for <br />Method of Verification Timing of Verification Verification Date Initial <br />1-21 <br />