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SDCO -- OVERFLOW DRAIN TOP OF OVERFLOW DRAIN 1', <br />SILVA CELLS /—(BEYOND) 42 <br />SILVA CELL <br />IzEel III=1-1 <br />BOTTOM OF SILVA CELLS--/ <br />SILVA CELL UNIT <br />3.0' TYP <br />CITY STANDARD D8 <br />STORM DRAIN INLET <br />FILL LINE --i\ <br />SILVA CELL <br />POST 12" DEPTH DRAIN ROCI <br />CALTRANS CLASS PERMEABLE PLACED ONATIVE SOIL @ 95% R. <br />(2) 2" DIA. HOLES IN E3A5E r /wrr <br />TO ALLOW FOR EXFILTRATION <br />SILVA CELL SUBDRAIN IN GRAVEL <br />BASE FILL W/ CLEANOUT <br />SILVA CELL PERMEABLE GEO TEXTILE— <br />N.T.S. 1.0' STORAGE LAYER <br />O SILVA CELL SYSTEM (DECK, BASE, AND <br />POSTS). <br />18" TREATMENT SOIL, INFILTRATION RATE <br />5 TO 10 IN/HR (FOR TREATMENT SOIL <br />�E SPECIFICATION, SEE APPENDIX K IN <br />SMCWPPP C3 STORMWATER HANDBOOK <br />DATED JUNE 2016). <br />12" DRAIN ROCK (CLASS II PERMEABLE <br />MATERIAL PER CALTRANS STANDARD <br />SPECIFICATIONS, SECTION 68-2.02F). <br />GEOTEXTILE (MIRAFI 140N OR APPROVED <br />G EQUAL) TO KEEP AGGREGATE FROM <br />MIGRATING DOWN THROUGH CELL DECK. <br />CLASS II AGGREGATE BASE COURSE, <br />�J DEPTH VARIES ACROSS SECTION. <br />/1 PEDESTRIAN SIDEWALK, SEE LANDSCAPE <br />�J PLANS FOR LAYOUT & DETAILS. <br />DISTRIBUTION HEADER <br />W/ INLET PIPE <br />CONCRETE SIDEWALK <br />OVER AGG BASE, SC <br />COVER <br />z <br />0 <br />U <br />Q <br />J <br />C1 <br />� STORM DRAIN CLEANOUT. CHRISTY TYPE <br />'+J F08 BOX WITH F08R LID MARKED STORM <br />GEOGRID, ATTACH TO CELL FRAMES WITH <br />CABLE TIES. <br />11 CABLE TIES, ATTACHING GEOGIRD TO <br />�I SILVA CELL LEG. <br />1"-4" (25 MM -100 MM) SPACING <br />BETWEEN SILVA CELLS AT BASE. <br />4" (100 MM) MIN AGGREGATE SUB CASE, <br />COMPACTED TO 957. RELATIVE <br />COMPACTION. <br />GEOTEXTILE (MIRAFI 140N OR APPROVED <br />EQUAL), TO PROVIDE SEPARATION <br />BETWEEN SUBGRADE AND AGGREGATE <br />BASE. <br />SUBGRADE, COMPACTED TO 95% RELATIVE <br />COMPACTION. <br />Q 6" PERFORATED DISTRIBUTION PIPE. PIN, PER SILVA CELL SPECIFICATIONS, TO <br />(U KEEP CELLS IN PLACE DURING <br />�K CALTRANS CLASS 2 DRAIN ROCK. CONSTRUCTION. <br />L 8" PERFORATED COLLECTOR PIPE. OVERFLOW DRAIN. NDS IN—LINE GRATE <br />0 PLACED 6" MIN ABOVE BIO—MEDIA SOIL <br />MIX.. <br />EXHIBIT B4 <br />(DTALUS <br />STORM WATER MAINTENANCE AGREEMENT <br />SILVA CELL TREATMENT: C-1 <br />�roiMeeru�ro I PLANNING I DEVELOPMENT <br />Job No.: 18190 Date: 01/19/22 Sheet: 04 of 05 <br />ATTY/AGR.2022.074/STMMA (Page 14 of 22) <br />