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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 />S=1% MIN <br />z <br />o � _ <br />Ln C3 <br />w -�I <br />a <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 SOIL <br />;EOTEXTILE FILTER FABRIC <br />MIRAFI 700 OR EQUIVALENT) <br />4° PERFORATED <br />PVC RISER <br />AGGREGATE ROCK LAYER <br />1.5° TO 25 DIAMETER <br />CAP 4" RISER PIPE AT <br />BOTTOM OF GRAVEL LAYER <br />BEDDING SAND <br />EXHIBIT B <br />163 IRIS STREET <br />CITY OF REDWOOD CITY SAN .4ATEO COUNTY CALIFORNIA <br />DATE: APRIL 4, 2024 SCALE: NOT TO SCALE <br />PAGE20F2 <br />Cbg SAN RAMON (926)866-0322 <br />ROSEVILLE (916)3]5-18]] <br />WWW .AND. COM <br />CIVIL ENGINEERS - SURVEYORS • PLANNERS <br />F:13085-00REDWOOD CIM163 IRIS STIACADIEXHIBITSIXB-EXHIBIT B_0&M 163 IRIS ST.DWG <br />ATTY/AGR.2025.179/Norcal Home Builders (163 Iris SO (Page 13 of 16) <br />