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Home My WebLink AboutR-406710PERMIT# eCURB INLET C2.3 eBEEHIVE GRATE C2.3 FG PER PLAN TYPE 1 CURB INLET W FREE BOARD SEE BIORETENTION HYDROSEED NOTE BIORETENTION SOIL MIX NATIVE SUBGRADE, DO NOT COMPACT NATIVE MATERIAL UNDER BIO-RETENTION AREA. BERM FG PER PLAN �II PER PLAN 8" OR 8" STREAMBED COBBLES PER WSDOT STD 9-03.11(2) (2.0'MIR) FIE PER PLAN \A j 3' C DEPTH 18" IN. O 8 j0 r, 8" MIN. LAYER OF FILTER C Tea® FABRIC, ALL SIDES. T PERFORATED PVC MIRAFI 140N OR EQUAL UNDER -DRAIN PIPE @ 0.0%. IE: PER PLAN BIORETENTION SOIL MIX OUTLET PER PLAN 1-1/2"-3W NON FRACTURED DRAIN ROCK EQUIV. TO WSDOT SPEC. 9-03.12(5) BIORETENTION SOIL MIX (BSM) SHALL BE A WELL -BLENDED HOMOGENEOUS MIXTURE OF 60 TO %PERCENT BY VOLUME MINERAL AGGREGATE FOR BIORETENTION SOIL AND 35 TO 40 PERCENT BY VOLUME COMPOST AS DETAILED IN THE TABLES BELOW. MINERAL AGGREGATE FOR SIORETENTION SOIL TABLE: MINERAL AGGREGATE GRADATION &EVE ORE PERCENT PASSING Ne INCH IN PERCENT U.S. NO %TO IN PERCENT U.S. N0, 10 75 TO BD PERCENT us NO.4D 25 TO 4D PERCENT ULS. NO. IN 4TO 10 PERCENT US. NO. NO 2TO4 PERCENT MINERAL AGGREGATE FOR BIORETENTION SOIL MUST BE FREE OF W000, WASTE, COATING. OR ANY OTHER DELETERIOUS MATERIAL. AND ALL AGGREGATE PASSING THE NO. NO SIEVE SIZE MUST BE NON -PLASTIC. MINERAL AGGREGATE MUST BE ANALYZED BY AN ACCREDITED LAB USING THE SIEVE SIZES NOTED IN THE TABLE TO THE LEFT. AND MUST MEET THE REQUIRED GRADATIONS. COMPOST TABLE: COMPOST GRADATION SIEVE SIZE MIN. PERCENT PASSING 2-INCH IN PERCENT I -INCH SS PERCENT 51&INCH SO PERCENT 114-INCH 75 PERCENT COMPOST MUST ORIGINATE A MINIMUM 65 PERCENT BY VOLUME FROM RECYCLED PLANT WASTE COMPRISED OF YARD DEBRIS, CROP RESIDUES. AND BULKING AGENTS. AND MEET THE DEFINITION OF 'COMPOSTED MATERIAL' IN WAG 173,350-100. COMPOST SHALL HAVE A MOISTURE CONTENT THAT HAS NO VISIBLE FREE WATER OR MST PRODUCED WHEN HANOUNG THE MATERIAL COMPOST SHALL HAVE AN ORGANIC MATTER CONTENT OF 40 PERCENT TO 65 PERCENT BY DRY WEIGHT, A CARBON TO NITROGEN RATIO BELOW 25:1. AND A pH BETWEEN 6.0 AND 8.0 ABORIST WOOD CHIP MULCH TABLE: ARSONIST WOOD CHIP MULCH GRADATION SIEVE 612E PERCENT PASSING 6 INCH 1DOPERCENT 24WN H TO IN PERCENT 1-INCH 70 TO 100 PERCENT 516-INCH 0TO 50 PERCENT U.S. NO 0 TO M PERCENT AR SORIST WOOD CHIP MULCH SHALL BE COARSE GROUND WOOD CHIPS (APPROXIMATELY V2" TO 6" ALONG THE LONGEST DIMENSION) DERIVED FROM TIE MECHANICAL GRINDING OR SHREDDING OF THE ABOVE-GROUNO PORTIONS OF TREES. IT MAY CONTAIN WOOD. WOOD FIBER. SANK. BRANCHES. AND LEAVES. BUT MAY NOT CONTAIN WEEDS, WEED SEEDS, OR VISIBLE AMOUNTS OF SOIL PLANS BIORETENTION HYDROSEED NOTES FORREFER BUFFER PUNTING FOR BUFFER PLANTING AND TOPSOIL REQUIREMENTS UNLESS OTHERWISE STATED ON APPROVED PLANS, THE REQUIRED METHOD OF SEEDING SHALL BE BY AN APPROVED HYDROSEEDER WHICH UTILIZES WATER AS THE CARRYING AGENT, AND MAINTAINS CONTINUOUS AGITATION THROUGH PADDLE BLADES. IT SHALL HAVE AN OPERATING CAPACITY SUFFICIENT TO AGITATE, SUSPEND, AND MIX INTO A HOMOGENEOUS SLURRY THE SPECIFIED AMOUNT OF SEED, WATER, FERTILIZER AND MULCH. GRASS SEED ALL SHALLNEW OONP SEED. SEED IS TO BE MIXEDMECHANICALLY ES EALLER.IIN IF SEEED IS M XEDN, THE SIT EACHVAR ETV SHALL BE DELIVERED IN THE ORIMAY BE MIXED -S IT CRIGINAL CONTAINERS LAANALYSIS.LERS GUARANTEED ONTRACTOR SHALLE FURNIS H TO THE NDSCAPE ARCHITECTT DE CALERIS GUARANTEED STATEMENT OF THE COMPOSITION OF THE MIXTURE AND THE PERCENTAGE OF PURITY AND GERMINATION OF EACH VARIETY. �\ GRASS SEED SHALL BE PURCHASED FROM A RECOGNIZED DISTRIBUTOR AND SHALL BE COMPOSED OF THE FOLLOWING VARIETIES MIXED IN THE PROPORTIONS INDICATED. SEED SHALL MEET THE MINIMUM PERCENTAGES OF PURITY AND GERMINATION SPECIFIED. SEED SHALL BE APPLIED AT THE RATE OF 240 POUNDS PER ACRE, UNLESS OTHERWISE SPECIFIED BELOW ON THE APPROVED PROJECT PLANS. WATER THE CONTRACTOR IS RESPONSIBLE FOR ENSURING A WELL -ESTABLISHED STAND OF GRASS THAT IS ACCEPTABLE TO THE OWNER FOR THE PURPOSE INTENDED. WATERING IS SUGGESTED AT LEAST TWICE A WEEK DURING THE GROWING SEASON AND AS NEEDED AFTERWARDS. WHEN GRASS IS REQUIRED AS A BEST MANAGEMENT PRACTICE ON STEEP SLOPES, NON -GERMINATED SEEDS SHALL BE KEPT MOIST, AND ROOTED GRASS SHALL HAVE AT LEAST 1 INCH OF WATER PER MONTH DURING THE PERIOD FROM MAY 15 THROUGH SEPTEMBER 15. FERTILIZER UNDERDRAIN PERFORATION NOTES: FERTILIZER SHALL BE A COMMERCIAL MIX WITH A 16-14-8 FORMULA, INCLUDING 50 PERCENT SLOW RELEASE SLOTS SHOULD BE CUT PERPENDICULAR TO NITROGEN, OR THAT MIX AS RECOMMENDED BY THE SEED SUPPLIER AND APPROVED FOR USE BY THE LANDSCAPE THE LONG AXIS OF THE PIPE AND BE 0.04-0.069 ARCHITECT. INCH BY 1 INCH LONG AND BE SPACED 0.25 INCH APART (SPACED LONGITUDINALLY). SLOTS MULCH SHOULD BE ARRANGED IN TWO ROWS SPACED WOOD OR RECYCLED NEWSPAPER CELLULOSE FIBER MULCH SHALL BE APPLIED AT THE RATE OF 2,000 POUNDS TO ON 45-DEGREE CENTERS AND COVER THE ACRE. MULCH SHALL BE INCORPORATED INTO THE SLURRY OF WATER, SEED, AND FERTILIZER AND SHALL CIRCUMFERENCE OF THE PIPE. SLOTTED SUBSURACE DRAIN PVC PER ASTM D1785 CONTAIN A COLORING AGENT TO FACILITATE A VISUAL INSPECTION OF COVERAGE DURING AND AFTER APPLICATION. SCHI GRASS MIXES USED SHALL MEET THE FOLLOWING SPECIFICATIONS: %BY WEIGHT CATCH BASIN NOTES: (BIOFILTRATION SOURCE GRASS): APPLICATION (RATES PER ACRE): 1. TYPE 1 P CATCH BASIN PER WSDOT 10% CREEPING FESCUE NOW WOODFIBER MULCH STANDARD PLAN B5.60-02. 45% INTERMEDIATE WHEATGRASS (REGREEN) 80N SEED MIX 5% PERENNIAL RYEGRASS 30DN 25-0-14 FERTILIZER W/ SULFUR COATED UREA 30%TALL FESCUE 30G ERO-BOND NOTES: 1. AVOID COMPACTION OF EXISTING SUBGRADE BELOW BASIN, 2, SCARIFY SUBGRADE TO A DEPTH OF 31NCHES MINIMUM IMMEDIATELY PRIOR TO PLACEMENT OF BIORETENTION SOIL MIX AND UNDERDRAIN AGGREGATE, EXCEPT WHEN LINER IS REWIRED. 3. LINER TO BE INSTALLED ONLY WHEN REQUIRED IN THE CITY OF RENTON SURFACE WATER DESIGN MANUAL(RENTON SWDM). LOW PERMEABILITY LINER TO BE 30 MIL MIN. GEOMEMBRANE LINER OR 12INCHES MIN. (DRY) CLAY LINER. CLAY LINER TO BE COMPACTED TO %% MINIMUM DRY ENSITY (ASTM Meet. WITH AT LEAST 30%CLAY PARTICLES PASSING (ASTM 0,122) AND AT LEAST 15% PLASTICITY INDEX (ASTM 04318). 4. UNDERDRAIN TO M V MIN. (PRIVATE). W MIN (PUBLIC SLOTTED PVC PER ASTM 01 T85 SCH 40. SLOTS SHOULD BE CUT PERPENDICULAR TO THE LONG AXIS OF THE PIPE AND BE ON TO0 See INCHES BY 1 INCH LONG AND BE SPACED 0 25INCHES APART (SPACED LONGITUDINALLY) SLOTS SHOULD BE ARRANGED IN FOUR ROWS SPACED ON 4SDEGREE CENTERS AND COVER In OF THE CIRCUMFERENCE OF THE PIPE. SLOPE PIPE AT 0.5% MIN UNLESS OTHERWISE SPECIFIED. PROVIDE ONE CLEANOUT MIN. PER IOD FEET OF UNDERDRAIN, AND AT EACH END. SEE STD. PLAN 226.N MATCH CROWN ELEVATION OF UNDERDRAIN TO OVERFLOW PIPE UNLESS OTHERWISE SPECIFIED. 5. Is -MIN. BIORETENTION SOIL MIX ON BOTTOM AND SIDES TO TOP OF BONDING AREA. BIORETENTION SOIL MIX TO MEET STD. PLAN 262,W 6. UNDERDRAIN AGGREGATE TO MEET STD. PLAN 282 A. 2 ARBORIST WOOD CHIP MULCH TO MEET STD. PLAN 262S0_ B. MAXIMUM LONGITUDINAL SLOPE (ALONG DIRECTION OF FLOW) OF BIORETENTION SWALES SHALL BE 6%. 9, WHERE NOT CONFLICTING WITH REQUIRED CLEARANCES OR UTILITIES, TREES MAY BE LOCATED N SHJRETENTHJN. REDUCE BOTTOM MOM TO 6 INCHES MINIMUM AND INCREASE SIE SLOPE TO 1,WIV ADJACENT TO TREE. TREES TO BE LOCATED ONLY OUTSIDE OF LINER FOR LINED FACILITIES. GENERAL NOTES: I. MINIMUM UTILITY SETBACKS AND PROTECTION MEASURES MUST CONFORM TO CURRENT CITY STANDARDS, STD. PLANS 26500. 265.10, AND 26520. AND OTHER UTILITY PROVIDER REQUIREMENTS. COORDINATE WITH CITY ENGINEER IN THE EVENT OF UTILITY CROSSINGS OR CONFLICTS. 2. BSM PLACEMENT. GRADING, AND CONSOLIDATION SHALL NOT OCCUR WHEN THE BSM IS EXCESSIVELY WET OR HAS BEEN SUBJECTED TO MORE THAN 117 OF PRECIPITATION WITHIN 48 HOURS PRIOR TO PLACEMENT. EXCESSIVELY WET IS DEFINED AS BEING AT OR ABOVE U%SOIL MOISTURE BY A GENERAL TOOLS AND INSTRUMENTS DSMMSOO PRECISION DIGITAL SOIL MOISTURE METER WITH FROM (OR EWNALENT). THERE SHOULD M NO VISIBLE FREE WATER IN THE MATERIAL. THE CONTRACTOR SHALL PLACE BSM LOOSELY WITH A CONVEYOR BELT OR WITH AN EXCAVATOR OR LOADER FROM A HEIGHT NO HIGHER THAN 6 FEET. UNLESS OTHERWISE APPROVED BY THE ENGINEER (I E.. DO NOT DUMP MATERIAL DIRECTLY FROM TRUCK INTO CELL) COMPACT BBM USING NON -MECHANICAL COMPACTION METHODS (E G BOOT PACKING. HAND TAMPING, OR WATER CONSOLIDATION) TO 83%ix 2%)OF THE MAXIMUM DRY DENSITY PER MODIFIED PROCTOR TEST (ASTM D1557). OR AS DIRECTED BY THE ENGINEER. 3. SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS. UNDERDRAIN AGGREGATE STD. PLAN-262.t DEPARTMENT PUBLIC WORKS ' PueucWORKS BIORETENTION SECTION 0 DEPARTMENT BIORETENTION SOIL MIX, AND MULCH GqZ 9/z8/(WITH UNDERDRAIN) SPECIFICATIONS BIORETENTION SWALE 0 Know what's below. CaII before you �9U HE M_TED INPART. NOT RESPONSIBLE WHILE THIS FORIT ACCURACY INFORMATION'S EVETO ML BE RELIABLE PICH IS NOT RESPONSIBLE FOR ITS ACCURACY, OR ERROR OR OMISSIONS WWCH MAY RELYING ON RECORDDOCUMENT INCORPORATED ENTWO TXIS DOCUMENTADVISED TO S A RESULT. :HOSE RELYING ON THIS RECORD OOLVMENi PREAOVIBED TO Pu11H ML OBTAIN INDEPENDENT VERIFICATION OF RBALCURALV BEFOREAFPLYING IT FORANYPORPOFF S-K N0. REVISION BY DATE APPR AAA BE"EC01°"¢' UNLESSOTHERWBENOTED,DRAWINGISNCI XaLM STD. PLAN - 262.10 GAZ 9/28/2018 I v.1k, w'.. „o. DATE I'°�AL: HAS 1°w'"' � CITY OF 4 RENTON DATUM Planning/Building/Public Works Dept. / �!G/ASC✓ TACO MA S EATTL E S PO KAN E TRI-CITIES M'Y910NAt �M1 2215 North 30th Street, Suite 300 Tacoma, WA 98403 OF//y/zDZJ 253.383.2422 TEL 253.383.2572 Em mANGL hhl.mm WEB IN COMPLIANCE WITH CITY OF RENTON STANDARDS WALKER MAZDA DEALERSHIP 7/29/2019 AS-BUILTS AHBL JOB #2180100.11 BIORETENTION CROSS-SECTION AND NOTES C2.4 r� O N N O O O T L] OF) O co O O O 00 Q J N N O O O DO T To 7 R-406710