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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 />III <br />4" SOLID PVC <br />w SUBDRAIN PIPE <br />S=1% MIN <br />w <br />J <br />0 <br />0 <br />s <br />=III_ <br />BUBBLE UP <br />5" SQUARE GRATE NDS <br />GRATE OR EQUAL <br />4° SOLID PVC <br />SUBDRAIN PIPE <br />4" PERFORATED PVC PIPE <br />TO DIFFUSE STORM WATER l i <br />(HOLES FACE DOWN) L11=��11111111L—IIl11 lIk=IIIdIIIII�--�III- lII��III1=I <br />--� i 'n i—I l fn l—III—iii—I i I—I 11—Iii—� <br />PER SHEET GP -1 <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 />PLANTING IN TRENCH AREA <br />SEE NOTE 2, THIS SHEET. <br />NATIVE SOIL <br />GEOTEXTILE FILTER FABRIC <br />(MIRAFI 700 OR EQUIVALENT) <br />4" PERFORATED <br />PVC RISER <br />rT AGGREGATE ROCK LAYER <br />1.5 TO 2.5° DIAMETER <br />CAP 4" RISER PIPE AT <br />BOTTOM OF GRAVEL LAYER <br />9107111111priol <br />REVISED <br />EXHIBIT B <br />751 RUBY STREET <br />CITY OF REDWOOD CITY SAN MATEO COUNTY CALIFORNIA <br />DATE: APRIL 30, 2021 SCALE: NOT TO SCALE <br />PAGE 2 OF 2 <br />SAN(925)866-0322 <br />SACRAMENTO (916) 3]5-18]] <br />W W W.CBANOG.COM <br />CIVILENGINEERS • SURVEYORS - PLANNERS <br />F: U085AOMFIEDWOOD CITYI751 RUBY <br />ATTY/AGR.2021/Amend No. 1/SF20A, LLC (Page 5 of 9) <br />