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City of Santa Ana 7-Eleven Convenience Store and Service Station Project Mitigation Monitoring and Reporting Program FirstCarbon Solutions 5 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 Fill material with high fines contents will be difficult to compact in wet weather conditions. Accordingly, during wet weather conditions, the use of predominately granular fill material with less than 5 percent passing the #100 sieve is recommended. • Pipelines: Typical pipe bedding as specified in the Standard Specifications for Public Works Construction (GREENBOOK) may be used. As a minimum, it is recommended that pipe be supported on at least 4 inches of granular bedding material, such as 0.75-inch rock or clean coarse sand with less than 5 percent fines and a sand equivalent of 40 or more as evaluated by ASTM D2419. The bedding shall extend from the bottom of the trench to at least 1 foot above the top of the pipe. Sand bedding shall be mechanically compacted to at least 90 percent relative compaction. Jetting of sand bedding shall not be permitted. On-site material, imported select material, or 2-sack cement/sand slurry may be used as backfill in trenches above the pipe bedding. The material selected shall match the engineering characteristics of the soils adjacent to the trench. Utility trench backfill beneath structures and hardscape shall be compacted to at least 90 percent relative compaction. The modulus of soil reaction (E’) is used to characterize the stiffness of soil backfill placed along the sides of buried flexible pipelines. For the purpose of evaluating deflection due to the load associated with trench backfill over the pipe, a value of 1,500 pounds per square inch (lbs/in2) is recommended for the general site conditions assuming granular bedding material (sand or gravel) is placed adjacent to the pipe. • Imported Material: Imported materials, if used for fill, shall be predominately granular, contain no rocks or lumps 1-19