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BUBBLE UP <br />2-4" COBBLES AROUND 5" SQUARE GRATE NDS <br />BUBBLE UP GRATE GRATE OR EQUAL <br />4" SOLID PVC PLANTING IN TRENCH AREA <br />BIORETENTION SOIL MIX SUBDRAIN PIPE PER NOTE 2, THIS SHEET. <br />PER SAN MATEO COUNTY <br />WATER POLLUTION PREVENTION ' <br />PROGRAM C.3 REGULATED ., �� � �// <br />PROJECTS GUIDE APPENDIX K. <br />INFILTRATION TRENCH <br />NOT TO SCALE <br />NOTES: <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 />NATIVE SOIL <br />GEOTEXTILE FILTER FABRIC <br />(MIRAFI 700 OR EQUIVALENT) <br />- 4" PERFORATED <br />PVC RISER <br />AGGREGATE ROCK LAYER <br />1.5" TO 2.5" DIAMETER <br />CAP 4" RISER PIPE AT <br />BOTTOM OF GRAVEL LAYER <br />BEDDING SAND <br />EXHIBIT B <br />1741 CONNECTICUT DRIVE <br />CITY OF REDWOOD CITY SAN MATEO COUNTY CALIFORNIA <br />DATE: AUGUST 19, 2020 SCALE: NOT TO SCALE <br />PAGE20F2 <br />Jk bV-v SAN SACRAMENTO <br />(925)866-032216 1877 <br />SACRAMENTO (916) 375-1877 <br />W W W.CBAND(3.COM <br />CIVIL ENGINEERS • SURVEYORS • PLANNERS <br />F:\3085-000\REDWOOD CITY\1741 CONNECTICUT DR\ACAD\EXHIBITS\XB-EXHIBIT B_0&M.DWG <br />ATTY/AGR.2020.260/SF19G, LLC (Page 10 of 14) <br />