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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 />Method of Verification Timing of Verification <br />Responsible for <br />Verification <br />Verification of Completion <br />Date <br />Initial <br />Fill material with high fines contents will be difficult to <br />compact in wet weather conditions. Accordingly, during wet <br />weather conditions, the use of predominately granular fill <br />material with less than 5 percent passing the #100 sieve is <br />recommended. <br />• Pipelines: Typical pipe bedding as specified in the Standard <br />Specifications for Public Works Construction (GREENBOOK) <br />may be used. As a minimum, it is recommended that pipe be <br />supported on at least 4 inches of granular bedding material, <br />such as 0.75-inch rock or clean coarse sand with less than 5 <br />percent fines and a sand equivalent of 40 or more as <br />evaluated by ASTM D2419. <br />The bedding shall extend from the bottom of the trench to <br />at least 1 foot above the top of the pipe. Sand bedding shall <br />be mechanically compacted to at least 90 percent relative <br />compaction. Jetting of sand bedding shall not be permitted. <br />On -site material, imported select material, or 2-sack <br />cement/sand slurry may be used as backfill in trenches above <br />the pipe bedding. The material selected shall match the <br />engineering characteristics of the soils adjacent to the trench. <br />Utility trench backfill beneath structures and hardscape shall <br />be compacted to at least 90 percent relative compaction. <br />The modulus of soil reaction (E') is used to characterize the <br />stiffness of soil backfill placed along the sides of buried flexible <br />pipelines. For the purpose of evaluating deflection due to the <br />load associated with trench backfill over the pipe, a value of <br />1,500 pounds per square inch (lbs/in2) is recommended for <br />the general site conditions assuming granular bedding <br />material (sand or gravel) is placed adjacent to the pipe. <br />• Imported Material: Imported materials, if used for fill, shall <br />be predominately granular, contain no rocks or lumps <br />FirstCarbon Solutions <br />YI\PubllcalIoi(PN1N)\IXi27\IXi9PN1\MMRP\0iPOMl City of5anta Ana ]-Eleaen MMRP. dou <br />