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HomeMy WebLinkAboutGRA24-0011 - AS BUILT PLANSSECTION.33, T.22N., R.5E., W.M. KING COUNTY, WASHINGTON r 10'BSBL I I rl I YI rl I I I �I I I I K I I I i I _ I I _ MIX OF ALDER, .r COTTONWOOD - {� TREES I I r SHOP BUILDING /J"L'LJ / \ \ ❑EXISTING SHED I o " I a I I I ,I m ry m DRAIN � FIELD I / If _ SEPTIC EXISTING HOUSE L 44 CALL 2 BUSINESS DAYS " BEFORE YOU DIG - GtiAVEL ,. 1-800-424-5555 ASPHA DRIVE -- - . — — — — — — — — — — -------- _ LECIEM I 18 200' — ROW o PP T 4 RIGHT OF WAY CENTERUNE > INVERT/CULOIItT I GRAVEL GRAVEL e MAILBOX ASPHALT - o UTIUTY/POWER POLE _ My ANCHOR \ \ © POWER VAULT \ — FL — — — — OT TELEPHONE VAULT \ SE 284TH STREET = q CONIFEROUS TREE YOv DECIDUOUS TREE \ ASPHALT - I -F — '8 t \ 3' DIA. ELq GRAPHIC SCALE 20 0 10 20 40 i INCH = 20 FEET GENERAL NOTES 1 CONSTRUCTION SHALL CONFORM TO THE CITY OF AUBURN'S ENGINEERING DESIGN AND CONSTRUCTION STANDARDS, EXCEPT AS OTHERWISE APPROVED BY DEVIATION, AND BE IN ACCORDANCE WITH THE APPROVED PLANS ANY CHANGES FROM THE APPROVED PLAN WILL REQUIRE APPROVAL FROM THE I OWNER ENGINEER OF RECORD, AND THE CITY 2ALL WORKMANSHIP AND MATERIALS SHALL CONFORM TO THE "WASHINGTON STATE DEPARTMENT OF TRANSPORTATION (WSDOT) STANDARD SPECIFICATIONS FOR ROAD, BRIDGE, AND MUNICIPAL CONSTRUCTION (CURRENT EDITION)," EXCEPT WHERE SUPPLEMENTED OR MODIFIED BY THE CITY'S CONSTRUCTION STANDARDS MANUAL THE ABOVE DOCUMENTS SHALL BE AVAILABLE AT THE JOB SITE DURING CONSTRUCTION. I 3A PRE -CONSTRUCTION MEETING SHALL BE REQUIRED PRIOR TO THE START OF ALL CONSTRUCTION. CONTACT THE PUBLIC WORKS DEPARTMENT AT 253-931-3010, TO SCHEDULE MEETING. 4 UNLESS STATED OTHERWISE, LOCATIONS SHOWN FOR EXISTING UTILITIES ARE APPROXIMATE THE CONTRACTOR IS CAUTIONED THAT OVERHEAD UTILITY LINES MAY NOT BE SHOWN ON THE DRAWINGS IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO DETERMINE THE TRUE ELEVATIONS AND LOCATIONS OF ALL I UNDERGROUND UTILITIES AND THE EXTENT OF ANY HAZARD CREATED BY OVERHEAD UTILITY LINES IDENTIFICATION, LOCATION, MARKING, AND RESPONSIBILITY FOR UNDERGROUND FACILITIES OR UTILITIES, IS GOVERNED BY THE PROVISIONS OF CHAPTER 19122 REVISED CODE OF WASHINGTON (RCW) PRIOR TO STARTING CONSTRUCTION, THE CONTRACTOR SHALL CALL ONE -CALL (811) FOR UTILITY LOCATIONS (WATER SANITARY SEWER STORM SEWER GAS, I POWER, TELEPHONE AND CABLE) 5IF A PROPOSED ROUTE IS NOT INCLUDED ON THESE PLANS, A PROPOSED ROUTE AND SCHEDULE FOR HAULING MATERIAL TO THE SITE SHALL BE SUBMITTED TO THE CITY FOR APPROVAL PRIOR TO THE START OF CONSTRUCTION IF THE CITY BELIEVES THAT THE PROPOSED HAUL ROUTE WILL ADVERSELY IMPACT THE STREET NETWORK, A SERA AMENDMENT MAY BE REQUIRED TO EVALUATE THE IMPACTS AND DETERMINE MITIGATION I REQUIREMENTS BEFORE BEGINNING WORK HAULING MAY BE LIMITED TO APPROPRIATE OFF-PEAK HOURS OR ALTERNATIVE ROUTES, AS DETERMINED BY THE CITY 6 THE CONTRACTOR SHALL BE RESPONSIBLE FOR PUBLIC SAFETY ON AND AROUND THE PROJECT PRIOR TO THE START OF WORK ALL METHODS AND EQUIPMENT USED FOR TRAFFIC CONTROL AND STREET MAINTENANCE SHALL BE SUBMITTED TO THE CITY FOR APPROVAL CONTRACTORS AND THEIR SURETY I SHALL BE LIABLE FOR INJURIES AND DAMAGES TO PERSONS AND PROPERTY SUFFERED BECAUSE OF CONTRACTORS OPERATIONS OR NEGLIGENCE CONNECTED WITH THEM 7.ALL CONSTRUCTION SURVEYING FOR EXTENSIONS OF PUBLIC FACILITIES SHALL BE DONE UNDER THE DIRECTION OF A WASHINGTON LICENSED LAND SURVEYOR OR A WASHINGTON LICENSED PROFESSIONAL CIVIL ENGINEER 8 CERTIFIED DRAWINGS ARE REQUIRED PRIOR TO PROJECT ACCEPTANCE REFER TO THE CITY'S "DEVELOPMENT RECORD CONSTRUCTION DOCUMENT' HANDOUT I ,d,,,,,,so.,v ,,,� - T„kg,. On" �..,,,1„p .. I,,.AJp s vne �rzawa /.ns. aea+ iddM ' M,",a,p ,.,.;m0 VICINITY MAP PROJECT DESIGN TEAM ENGINEER/CESCL: DECCIO ENGINEERING INC 17217 TTH AVE W. BOTHELL, WAW012 (2W) 390-8374 CONTACT RICHARD DECCIO EMAIL. RDECCIO@COMCASTNET SITE INFORMATION: SITE LOCATION PARCEL NUMBER PROPOSED USE EXIS71NGZONING LOT SIZE: OWNER: KENNETH LIGHTWEIS 11660 SE 284TH ST AUBURN, WA 98030 11660 SE 284TH ST, AUBURN, WA 3322059OL41 SEC R-6 59,677 SF LEGAL: BE OTR SIN OTR SW OTR SW OTR STR 33 22 05 EXC W 100 FT 8 EXC PORTION WITHIN COUNTY ROAD STM24-OOXX (LEVEL 2 STORM PERMIT) BLD23-0126 (BUILDING PERMIT). STORM PERMIT TOTAL DISTURBED AREA = 6,876 SF TOTAL NEW & REPLACED HARD SURFACE = 4,088 SF TOTAL NEW HARD SURFACE = 4,088 SF.. CUT = 125 CY FILL = 125 CY NET IMPORT/EXPORT = 0 CY TOTAL EARTHWORK = 250 CY SHEETINDEX C1. vne �rzawa /.ns. aea+ iddM ' M,",a,p ,.,.;m0 VICINITY MAP PROJECT DESIGN TEAM ENGINEER/CESCL: DECCIO ENGINEERING INC 17217 TTH AVE W. BOTHELL, WAW012 (2W) 390-8374 CONTACT RICHARD DECCIO EMAIL. RDECCIO@COMCASTNET SITE INFORMATION: SITE LOCATION PARCEL NUMBER PROPOSED USE EXIS71NGZONING LOT SIZE: OWNER: KENNETH LIGHTWEIS 11660 SE 284TH ST AUBURN, WA 98030 11660 SE 284TH ST, AUBURN, WA 3322059OL41 SEC R-6 59,677 SF LEGAL: BE OTR SIN OTR SW OTR SW OTR STR 33 22 05 EXC W 100 FT 8 EXC PORTION WITHIN COUNTY ROAD STM24-OOXX (LEVEL 2 STORM PERMIT) BLD23-0126 (BUILDING PERMIT). STORM PERMIT TOTAL DISTURBED AREA = 6,876 SF TOTAL NEW & REPLACED HARD SURFACE = 4,088 SF TOTAL NEW HARD SURFACE = 4,088 SF.. CUT = 125 CY FILL = 125 CY NET IMPORT/EXPORT = 0 CY TOTAL EARTHWORK = 250 CY SHEETINDEX C1. COVERSHEET C2. EXISTING SITE CONDITIONS C3. TESC PLANAND SWPP PLAN 04. GRADINGANDDRA/NAGE C5. DETAILS A&BUILT RECORD DRAWING CERTIFICATION THESE DRAWINGS CONFORM TO THE CONTRACTOR'S CONSTRUCTION RECORDS. INSPECTOR sloop 11AMrz025 DEV. REVIEW ENG. '" 11/03/2025 THESE PLANS ARE APPROVED FOR CONFORMANCE WITH THE CITY OF AUBURN'S REQUIREMENTS. ,, / DEV. REVIEW ENGINEER: DATE APPROVED: 08/27/2024 m m Y m o o > w a Zp w w � a N > w rc w K k ¢z N m N � U Imo— b � U m m 0 ¢ 0 z y o m w Z e c� � a ~ o b y N 0 0 D N i 0 o N daH�rb15 PWh O.7 EyS a ZD Q3w1r �wna n do O) C c W O v v W N N Z Ln Ln 3 a 0 0 o w o < a a 3 of Z) Q ,w„ O 00 N O w z E w w z w O X O: w a z � U ('5 w Z a Y N SHEET 1 OF 5 C1 k SECTION.33, T.22N., R.5E., W.M. KING COUNTY, WASHINGTON 1V BSBL ___________________ 30' 30' I I I I I I I I I I I I GRAPHIC SCALE 20 0 10 20 40 I I I I N I 1 INCH = 20 FEET �1 I l MIX OF ALDER, COTTONWOOD LESS THAN TREES SIXCOTTONWOOD TREES TO BE REMOVED FOR I BUILDING SITE I 1 PROVIDE AMENDED SOILS 40-,' TO ALL DISTURBED AREAS `1\l PER BMP T5.13 AND FIG. V-11.1 c (SEE DETAIL-2, SHEET C-5) \ / A 85' EXISTING d. SHED % )'���Gravel tlrrve not STOCK PILE AREA \' `' constructed INSTALL SILT FENCING U51 \ W Q I I I = I i N m DRAIN m W Br FIELD — \ LIMITS OF DISTURBED I - AREA I I SEPTIC \k_ EXISTING FENCE 77' EXISTING HOUSE `$",✓{' "A; NSTALL GATE OR ) ! REMOVE SECTION OF 4W ✓ FENCE 1 I 1 I ° 34' — INSTALL TREE fPROTECTION (SEE DETAIL-1, SHEET C5) ALL 2 BUSINESS DAYS BEFORE YOU DIG 1-800-424-5555 GFAVE '',j AS 3' DIA. o 0 \\ to r; ^.';: DRIVE B DECIDUO FEE m \ L __.....______ — — — — ______-----------J 1 TALL SILT FENCE_ LEG'D 1 18, PER STD DTL E-02 1 I 200' SIGAC ROW ROW 1 I 9 PP ti RIGHT OF WAY CENTERLINE I ) > INVERT/CULVERT I GRAVEL GRAVEL PP MAILBOX - INSTALL ROCK ASPHALT o UnuTY/PONER POLE \ cur ANCHOR CONSTRUCTUIN \ � \ ENTRANCE PER STD DTL © POWER VAULT \ _ FL _ �T— _ _ _ _ _ _ f _ _ OT TELEPHONE VAULT \ \\ SE 284TH STREET \ q CONIFEROUS TREE — _ O DECIDUOUS TREE ASPHALT \ M \ ROW _ f l TOPSOIL: \ STOCKPILE EXISTING TOPSOIL DURNING GRADING AND REPLACE IT PRIOR TO PLANTING \ (REF SHEET C-5) I I \\ I I CONSTRUCTION SEQUENCE 1 CONTACT THE CITY OF AUBURN AND SCHEDULE A PRE -CONSTRUCTION MEETING. 2. FLAG OR FENCE CLEARING LIMITS 3 INSTALL CATCH BASIN PROTECTION IF REQUIRED, PER COA STANDARD DETAIL E-03 OR E4 4. GRADE AND INSTALL CONSTRUCTION ENTRANCE PER COA STANDARD DETAIL E-01, IF APPLICABLE 5 INSTALL SILT FENCE PER COA STANDARD DETAIL E-02. 6 MAINTAIN EROSION CONTROL MEASURES IN ACCORDANCE WITH THE CITY OF AUBURN STANDARDS AND MANUFACTURER'S RECOMMENDATIONS 7 MAINTAIN AND MODIFY EROSION CONTROL MEASURES AS SITE CONDITIONS CHANGE TO ENSURE SITE IS ALWAYS IN COMPLIANCE WITH THE CITY TESC MINIMUM REQUIREMENTS 8 UPON COMPLETION OF THE PROJECT, ALL DISTURBED AREAS MUST BE STABILIZED AND TEMPORARY EROSION AND SEDIMENT CONTROL SNIPS REMOVED GRADING AND EROSION CONTROL NOTES 1 WITHIN THE CITY OF AUBURN, ALL REQUIRED SEDIMENTATION AND EROSION CONTROL FACILITIES INDICATED ON THE PLANS MUST BE CONSTRUCTED AND IN OPERATION PRIOR TO LAND CLEARING ANDIOR OTHER CONSTRUCTION ACTIVITIES THESE FACILITIES SHALL BE MAINTAINED AND UPGRADED, IF NECESSARY, TO ENSURE THAT SEDIMENT -LADEN WATER AND STORM DRAINAGE RUNOFF DOES NOT IMPACT THE ADJACENT PROPERTIES, NATURAL DRAINAGE WAYS, OR THE EXISTING CITY STORM DRAINAGE SYSTEM. 2.THE SOURCES FOR ALL MATERIAL IMPORTED TO THE SITE SHALL BE APPROVED BY THE CITY 3 THE STORM DRAINAGE DETENTION (RETENTION IF INFILTRATION SYSTEM IS USED), SEDIMENTATION AND EROSION CONTROL FACILITIES DEPICTED ON THE APPROVED DRAWINGS ARE INTENDED TO BE MINIMUM REQUIREMENTS TO MEET ANTICIPATED SITE CONDITIONS ADDITIONAL DRAINAGE AND EROSION CONTROL FACILITIES MAY BE REQUIRED AS SITUATIONS WARRANT DURING CONSTRUCTION. THE IMPLEMENTATION, MAINTENANCE, REPLACEMENT AND ADDITIONS TO THESE CONTROL SYSTEMS SHALL BE THE RESPONSIBILITY OF THE PERMITEE 43HE TEMPORARY EROSION CONTROL FACILITIES, INCLUDING ALL PERIMETER CONTROLS AND THE DETENTION (RETENTION IF INFILTRATION SYSTEM IS USED), CONTROL PONDS, SHALL REMAIN IN PLACE UNTIL FINAL SITE CONSTRUCTION IS COMPLETED. AFTER CITY APPROVAL, THE CONTRACTOR WILL BE RESPONSIBLE FOR REMOVING ALL TEMPORARY FACILITIES. 5.THE CONTRACTOR WILL BE REQUIRED TO WATER THE SITE, AS NECESSARY, TO REDUCE DUST EMISSIONS AS A RESULT OF CONSTRUCTION ACTIVITY. 6340 TRACKING IN THE ROADWAY IS ALLOWED. IF SEDIMENT IS TRACKED ONTO THE ROAD, THE ROAD SHALL BE THOROUGHLY AND IMMEDIATELY CLEANED BY SHOVELING OR PICKUP SWEEPING. TRANSPORT SEDIMENT TO A CONTROLLED SEDIMENT DISPOSAL AREA. KEEP STREETS CLEAN AT ALL TIMES. 7 ALL AREAS OF ACTIVE EARTHWORK WHICH HAVE THE POTENTIAL FOR EROSION AND SEDIMENTATION IMPACTS ON ADJACENT PROPERTIES, NATURAL DRAINAGE WAYS, OR THE EXISTING CITY STORM DRAINAGE SYSTEM MUST BE STABILIZED ACCORDING TO THE FOLLOWING SCHEDULE FROM MAY 1 TO SEPTEMBER 30, AREAS AT FINAL GRADE AND THOSE THAT ARE SCHEDULE TO REMAIN UN -WORKED FOR MORE THAN SEVEN (7) DAYS SHALL BE STABILIZED. FROM OCTOBER 1 TO APRIL 30 EARTHWORK ACTIVITIES SHALL BE CONDUCTED IN STAGES IN ORDER TO MINIMIZE SOIL EXPOSURE. EXPOSED SOILS THAT WILL REMAIN UN -WORKED FOR MORE THAN TWO (2) DAYS SHALL BE STABILIZED IMMEDIATELY. A&BUILT THESE PLANS ARE APPROVED FOR CONFORMANCE WITH THE CITY OF AUBURN'S REQUIREMENTS. ,, / DEV. REVIEW ENGINEER: DATE APPROVED: 08/27/2024 m i m GO � 0 > a w Q o >>B U > W W m `k 0z ti m N (i V � U m m ¢ e o m m y 2 ¢ o m z Z Z 3 Q b y N w s 0 0 Tm 3 Gt ON oJW O�`�� N ¢3 n r n a C4 00 «Co dbH)%b15 1 r FPS„Do- N �ma Q3w1r �wna nmry Im 0) Lu W O U Lu N N � Z� n� Ln 0 0 O w Ow a a 3 Go Z) Q y a U v I w z N w E vi w z O J O � a O ZD U Z a Y N SHEET 3 OF 5 C3 E GRAPHIC SCALE 20 0 10 20 40 1 INCH = 20 FEET SECTION.33, T.22N., R.5E., W.M. KING COUNTY, WASHINGTON I I I 10'BSBL — — I I .I I I I I I -I I I 1 I I >1 I >I I I _ MIX OF ALDER, - COTTONWOOD TREES INSTALL SPL4SHBLOCKPER - FIGURE V4.6(SEE DETAIL 4 SHOP BUILDING SHEET C-5) IDS 600 SF r \ FF440.30 I I I I I I I I I I I I I I I I $I y NI m a B. I� CALL 2 BUSINESS DAYS I BEFORE YOU DIG v 1-800-424-5555 \ L \ LE 00 / ROW 4 RIGHT OF WAY CENMRUNE / > INVERT/CULO T MAILBOX o IPOLE c � CLANCHORR My ANCHOR 1 I\ © POWER VAULT OT TELEPHONE VAULT q � CONIFEROUS TREE \ 435 O DECIDUOUS TREE 600 SF DS EXISTING DSHED . 1REGRADE TO ENSURE A MIN 50'FLOW PATH OVER VEGETATION., TL•17 FIELD —� / SEPTIC 77 m EXISTING HOUSE '�.1: 1 44' GRAVEL:, ASPHALT" "�.'�: :�." DRIVE ' e: ' 10' BSSL — — — — — — —19 — — — — — — — 1B' 1 200' GRAVEL GRAVEL ASPHALT SE 284TH STREET I — —INSTALL DRIVEWAY DISPERSION W/10-FT MIN VEGETATED FLOW PATH PER BMP T5.12 AND FIGURE V-3.2 (SEE DETAIL 3 SHEET C-5) I \ THEOWNER MUST I KNOWTHISMUST REMAIN VEGETATED J FOR THIS TO SEA m FUNCTIONAL m DISPERSIONAREA o I I I T ^ EXISTING FENCE I I t I A I I I I INSTALL GATE OR REMOVE SECTION OFFENCE I I I I I I I I S DIA p DECIDUO TREE ......... J 2 SIGW I I I THE FOLLOWING APPLY TO THE USE OF SPLASHBLOCKS: I 1. MAINTAIN A VEGETATED FLOW PATH OF AT LEAST 50 FEET BETWEEN THE DISCHARGE POINT AND ANY PROPERTY LINE, STRUCTURE, [.] OR OTHER IMPERVIOUS SURFACE. I. I 2 A MAXIMUM OF 70D SQUARE FEET OF ROOF AREA MAY DRAIN TO EACH SPLASHBLOCK 3 PLACE A SPLASHBLOCK OR A PAD OF CRUSHED ROCK (2 FEET WIDE BY 3 FEET LONG BY 6INCHES DEEP)AT EACH DOWNSPOUT DISCHARGE POINT. I I I I I I I I I LL U) w QI = I 00 W r I I I \ � I I I I 1 I I I 1 I I I I I I I I\ II I d 0I ¢ I 0 I 1 / / I s L PP / I I + ROW _ —------ -- -- -- _ l \ I I CSTCV ✓� SECTION A -A GRAVEL DRIVEWAY 1' WIDE CRUSHED GRAVEL STRIP (6- DEEP) A&BUILT THESE PLANS ARE APPROVED FOR CONFORMANCE WITH THE CITY OF AUBURN'S REQUIREMENTS. ,, / DEV. REVIEW ENGINEER DATE APPROVED: 08/27/2024 m ym mo o; w a z W u a s > w o'k z �n n �Q m Imo— N c'i U � U m m m ¢ m z o 4m y o m z Z Z V h N N U 3 a F o b y N 00 IN IN m D i N a3 e a 0 0 0 «W o N daH�r eh 00 b15 E�"`' a Zma Q3 m1r on �wna nm$ 0) C C W O v v W 0 NN Z n V) ti r � O F ow a a 3 z cl- j Z Q 0 N (' U z a ¢ z w w z C4 N U N Q w z z U O o: a (o Q z � U C7 w Z a Y N SHEET 4 OF 5 C4 Figure 1111.312 Sheet Flow Dispersion for Driveway! seem Iu,p cwmr Dop+m,m,l a ReNnl Raaaoaca. lien ��. If r Not; -'�l l Berm Detail as p I Imea:n nftn, v tnwaea,e..y If EMpnlw,eN AM Itt iF Mine i I N agatebd wmwiN mman anp.re<n a I Ireicn / I Plan Driveway Dispersion Trench Driveway Slope Vanes and Slopes Toward Street i5% I 6 i l ' I W. za1 p a'°z.mm I i zs Plan Sheet Flow Dispersion from a on."my . Flat to Moderately Sloping Driveways uorrosrJus Sheet Flow Dispersion for Driveways aewea on."an sins ECOLOGY prrvaun'eww.xrrwmmPVn.mm�aomro+wmxaelw Ilsouaweenlnaton seer iaddty.aaaar.m. DETAIL 3 DRIVEWAY DISPERSION Figure VAX: Typical Downspout Splashblock Dispersion SO nln wwaa4e footman RVlmmepNewm wmzm.r.ama spNNtloak saom: xlnoenmowam.aala,nea m.aneew can M2 Hmm Lboigve minWn xor MsfJIL Typical Downspout Splashblock Dispersion emaal Wiaannela DETAIL 4 DOWNSPOUT SPLASHBLOCK SECTION.33, T.22N., R.5E., W.M. KING COUNTY, WASHINGTON /�SIGNIFIOANT EXISTING TREE I r +W WYWiiWIiYYYYWY�! CIUMM ROOT ZONE NOTES 1. MINIMUM SIX (5) FOOT HIGH TEMPORARY CHAMUNK MERGE SHAU_ BE PLACED AT THE CRITICAL OCR ZONE OR DESIGNATED UNIT OF DI�RELANCE OF THE TREE TO ME SAVED. FIENCE SHAUL COMPUETELY .4.11111011111 4, FORCING SIGNAGE AS DEINUED ANNE MUST BE POSTED MV FIFTEEN �15) FEET ALONG THE FORCE. SIGN TO BE MINIMUM IINII. AND MADE OF VIEUMERPROOF MATERIAL - TREE PROTECTION DETAIL 1 TREE PROTECTION Soil Retention Retain, in an undisturbed state, the duff layer and native topsoil to the maximum extent practicable. In arty areas requiring grading, remove and stockpile the duff layer and topsoil on site in a cl s ignated, controlled area, net adjacent to public resources and critical areas, to be reapplied to other portions of the site where feasible. soil Quality All areas subject to clearing and grading that have not been covered by impervious surface, mcor- pomted into a drainage facility or engineered as structural fill or slope shall, at project completion, demonstrate the following: 1. A topsoil layer with a minimum organic matter content of 10% dry weight in planting beds, and 5%organic marker content in turf areas, and a pH from 6 0 to 8 0 or matching the pH of the undisturbed soil. The topsoil layer shall have a minimum depth of eight inches except where tree roots limit the depth of incorporation of amendments needed to meet the criteria. Subsoils below the topsoil layer should be scarified at least 4 inches with some incorporation of the upper material to avoid stratified layers, where feasible. 2. Mulch planting beds with 2 inches of Organic material. 3_ Use compost and other mrterialsthat meet the following Organic content requirements: a. The organic content for "pre -approved' amendment rates can be met only using tour post meeting the compost specifieafion for BMP T7.30: Bioretention with the exception that the compost may have up to 35% biosdids cr manure. The compost must also have an organic matter content of 40%to 65%, and a carbon to nitrogen ratio below 25:1. The carbon to nitrogen ratio may be as high as 35:1 for plantings oannposed entirely of plants native to the Puget Sound Lowlands region. b. Calculated amendment rates may be met through use of composted material meeting (aI above; or other organic materials amended to meet the carbon to nitrogen ratio requirements, and not exceeding the contaminant limits identified in Table 220-B, Test- ing Parameters, in WAC 173-350-220. The resulting soil should be oondutive to the type of vegetation to be established. Implmientation Options The soil quality design guidelines listed above can be met by using one of the methods listed below: 1. Leave undisturbed nahvevegetabon and sail, and pratectfromconpactionduringcon- struction. 2 Amend existing site topsoil Or subsoil either at default"pre-approved" rates, or at custom cal- culated rates based on tests of the soil and amendment. 3- Stockpile existing topsoil during grading, and replace it prior to planting_ Stockpiled topsoil must also be amended if needed to meet the organic matter Or depth requirements, either at a default "pre -approved" rate or at a custom calculated rate. 4. Import topsoil nHx of sufficient organic content and depth to meet the requirements. More than one method may be used on different portions of the same site- Soil that already meets the depth and organic matter quality standards, and is not compacted, does not need to be amended. Figure VF11,1: Planting Bed Cross -Section /I A Vtlr hopes esuww, abk agenlc meow • 741. rrowllea RegiaeE imm (nalaFas sine Re.oumas Fw lmpUmangnp SW OIUNyaM Depa BNPTS I] a hDOE SbmlwaMAfalagenenl Mlwmaby Wesrenr NYaMpM. WIG, Washingnn Orgarc Regdag council NOT TO9GLE Planting Bed Cross -Section Rmd Jtme WIG DEPARTUEU: OF ECOLOGY PkeaeNear oeIMawwwxy aw wronrxnwIts wPnd+npnp.Avoided; .m. Stale or Weznmgton "Beion sir4 ky, and eiadeinen DETAIL 2: AMENDED SOILS A&BUILT THESE PLANS ARE APPROVED FOR CONFORMANCE WITH THE CITY OF AUBURN'S REQUIREMENTS. ,, DEV. REVIEW ENGINEER: DATE APPROVED: 08/27/2024 r To m m o 0 > w a Zp W u a In 5:W W w m `k ¢ p N m� � U > ana co m y s z o m w Z Z Ud v N 3 � Q 1- < lo y N 0 0 I I w 0 i N 0 0 «W o N daH�rb15 h 00 E�"`' a Zm. Q3w1r on nmry C C C wU O U U w 0 IN U �h Z = n n ti r � O F O0 to a a 3 Z tY Q J ti 0 I � Q �} O tY) z w N � W Z W O W to K � a� to z � O � O U uh U w Z a Y N SHEET 5 OF 5 CJ ]