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City of Santa Ana 7-Eleven Convenience Store and Service Station Project Mitigation Monitoring and Reporting Program FirstCarbon Solutions 6 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 greater than 3 inches in maximum dimension, and have a Plasticity Index less than 15. Imported materials shall be reviewed and approved by the Geotechnical Engineer before being brought to the site. • Oversized Material: Excavations may generate oversized material. Oversized material is defined as rocks or cemented clasts greater than 3 inches in largest dimension. Oversized material shall be broken down to no greater than 3 inches in largest dimension for use in fill. • Temporary Excavations: The existing fill soils can be considered Type B for excavation in accordance with Occupational Safety and Health Administration (OSHA) and California Occupational Safety and Health Administration (Cal/OSHA) requirements. Temporary excavations shall be shored or excavated with a slope not steeper than 1.5:1 (horizontal to vertical) in accordance with OSHA and Cal/OSHA requirements. The excavations shall be inspected daily by the contractor’s Competent Person before personnel are allowed to enter the excavation. Any zones of potential instability, sloughing or raveling shall be brought to the attention of the Geotechnical Engineer and corrective action implemented before personnel begin working in the excavation. Excavated soils shall not be stockpiled behind temporary excavations within a distance equal to the depth of the excavation. A Geotechnical Engineer shall be notified if other surcharge loads are anticipated so that lateral load criteria can be developed for the specific situation. If temporary slopes are to be maintained during the rainy season, berms are recommended near the tops of slopes to prevent runoff water from entering the excavation and eroding the slope faces. 1-20