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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 />w — <br />C) <br />4" SOLID PVC <br />w SUBDRAIN PIPE <br />Q S=1% MIN <br />Elf 0 <br />=I I F <br />J <br />c° ZD <br />ZD �T= <br />Q ISI <br />Qf <br />Elf <br />o �III� <br />�I I It <br />c �=1 <br />=f I I- <br />4" PERFORATED PVC PIPE <br />TO DIFFUSE STORM WATER I � <br />(HOLES FACE DOWN)7. <br />BUBBLE UP <br />5" SQUARE GRATE NDS <br />GRATE OR EQUAL <br />4" SOLID PVC <br />SUBDRAIN PIPE <br />-I 11�I 1= I I`i I I�—�1rll=1 I i-1 I I—ITIS <br />I,���[lk l�lllll�llll {jll�Iliilll}iZlIlliT1II—I <br />PER SHEET GP -1 <br />INFILTRATION TRENCH <br />NOT TO SCALE <br />NOTES: <br />�. 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 />303 IRIS STREET <br />CITY OF REDWOOD CITY SAN MATEO COUNTY CALIFORNIA <br />DATE: SEPTEMBER 15, 2020 SCALE: NOT TO SCALE <br />PAGE 2 OF 2 <br />c b SAN (925) 866-0322 <br />SACRAMENTO (916) 375-1877 <br />WWW CBANDG COM <br />CIVIL ENGINEERS • SURVEYORS • PLANNERS <br />F: 13085.00MREDWOOD CITIA303 IRIS SRACADIEXHIBITSIXB-EXHIBIT B 0&M.DWG <br />ATTY/AGR.2020.226/SF19G, LLC (303 Iris Street) (Page 10 of 14) <br />