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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 />wCD <br />1II <br />4" SOLID PVC <br />Eli SUBDRAIN PIPE <br />Q S=1% MIN <br />Ln ch� <br />Ln <br />w -1I1 <br />o� <br />� J — <br />II <br />o� <br />CD, <br />=i l- <br />—1 <br />AIL <br />S <br />CY <br />=1 11= <br />4" PERFORATED PVC PIPE ` I <br />TO DIFFUSE STORM WATER F1-1 I( <br />(HOLES FACE DOWN) I <br />NOTES: <br />BUBBLE UP <br />5" SQUARE GRATE NDS <br />GRATE OR EQUAL <br />4" SOLID PVC <br />SUBDRAIN PIPE <br />1=1 11=1 I I I I 1-11 i=1 I I=I 11=i I I��I I=1 <br />,�II�,�IIIII�If�IIfIIIII�IIfIT111i1iIll�Illll� II <br />PER SHEET GP -1 <br />INFILTRATION TRENCH <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 />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 />2403 WHIPPLE AVENUE <br />CITY OF REDWOOD CITY SAN MATEO COUNTY CALIFORNIA <br />DATE: AUGUST 19, 2020 SCALE: NOT TO SCALE <br />PAGE 2 OF 2 <br />c b SAN AMNION (925) 866-0322 <br />SACRAMENTO (976) 375-16771877 <br />9 <br />WWW CBANDG COM <br />CIVIL ENGINEERS • SURVEYORS • PLANNERS <br />F:13085.00OIREDWOOD CITY12403 WHIPPLE AVE=ADIEXHIBITSIXB-EXHIBIT B 0&M.DWG <br />ATTY/AGR.2020.223/SF19G, LLC (2403 Whipple Avenue) (Page 10 of 14) <br />