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2-4'" COBBLES AROUND <br />BUBBLE UP GRATE <br />BIORETENTION SOIL MIX <br />PER SAN MATEO COUNTY <br />WATER POLLUTION PREVENTION <br />PROGRAM C.3 REGULATED <br />PROJECTS GUIDE APPENDIX K. <br />4" SOLID PVC <br />w SUBDRAIN PIPE <br />a S=19 MIN <br />z � <br />< - <br />o - <br />w <br />4" PERFORATED PVC PIPE <br />TO DIFFUSE STORM WATER <br />(HOLES FACE DOWN) <br />NOTES: <br />BUBBLE UP <br />5" SQUARE GRATE NDS <br />GRATE OR EQUAL <br />4" SOLID PVC <br />SUBDRAIN PIPE <br />NOT TO SCALE <br />1. INFILTRATION TRENCH TO BE CONSTRUCTED PER <br />SAN MATEO COUNTYWIDE WATER POLLUTION <br />PREVENTION PROGRAM (SMCWPPP) C.3 REGULATED <br />PROJECT GUIDE SECTION 6.4. <br />2. APPROVED PLANTS FOR INFILTRATION TRENCH ARE <br />PER APPENDIX A OF THE SMCWPPP C.3 <br />REGULATED PROJECTS GUIDE. <br />3. CONTRACTOR TO RIP BOTTOM OF TRENCH. <br />PLANTING IN TRENCH AREA <br />PER NOTE 2, THIS SHEET. <br />NATIVE Sols_ <br />:EOTEXTILE FILTER FABRIC <br />MIRAFI 700 OR EQUIVALENT) <br />4" PERFORATED <br />PVC RISER <br />AGGREGATE ROCK LAYER <br />15' TO 2.5" DIAMETER <br />CAP 4" RISER PIPE AT <br />BOTTOM OF GRAVEL LAYER <br />BEDDING SAND <br />EXHIBIT B <br />1721 VIRGINIA AVENUE <br />CITY OF REDWOOD CITY SAN MATEO COUNTY CALIFORNIA <br />DATE: JEFF 3, 2024 SCALE: NOT TO SCALE <br />PAGE 2 OF 2 <br />Cbg SAN RAMON (925)866-0322 <br />ROSEVILLE (916) 375-1877 <br />W W. C.INDG. COM <br />CIVIL ENGINEERS - SURVEYORS • PLANNERS <br />F:13085-000\REDWOOD CITY11721 VIRGINIA AVEIACADIEXHIBITSIXB-EXHIBIT B_0&M_1721 VIRGINIA AVEDWG <br />ATTY/AG R.2025.180/SF21G, LLC (1721 Virginia Ave) (Page 13 of 16) <br />