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Permit File BLD-2022-0969 3928 Rock Ridge Parkway (4)
Storm Water Drainage Report Minimum Requirement 2 �'F X ENGINEERING DEPARTMENT ,q 904 6t" Street Anacortes, WA 98221 0 6 www.anacorteswa.gov Official Use Only: (Information to Inspectors) Required Storm Water Facility and other related requirements: Project Address: 3928 ROCK RIDGE PARKWAY Submittal Date: Parcel Number: #P133951 Revision Number: Permit Number: Reviewer: Acceptance Date (COA): FRONT OF REPORT: Submittal Checklist: (All items listed below are required for a complete submittal) o Cover Sheet (Preparer to Provide): Project title, Location, Revision dates, Engineer's Stamp o TAB 2: Minimum Requirement#2 — Construction Stormwater Pollution Prevention (SWPP) o APPENDIX 1 - Survey performed by a Professional Land Surveyor o APPENDIX 2 - Soils Analysis (Volume 1, Chapter 3.1.1) o APPENDIX 3 - Model Soil Management Plan for BMP T5.13 o APPENDIX 4 - Determining Construction Site Sediment Damage Potential (Appendix 7) o APPENDIX 5 - Site Plan with all applicable information (Minimum Size 11x17 — 30 scale) o APPENDIX 6 - Documented Site Photos (North, South, East and West) o APPENDIX 7 - Drainage BMP Facility Maintenance Covenant, if applicable. To be recorded prior to the Temporary Certificate of Occupancy, Certificate of Occupancy or Final Acceptance. Stormwater Management Requirements: o Refer to the 2012\14 Department of Ecology Manual, as amended in 2014 for further required information. o See also, City of Anacortes Municipal Code 19.76 for additional information o See also, current Engineering Development Standards, Chapter 2- Storm Drainage for additional information. Project Description and Summary: Summar Table Existing Proposed Development Type Residential Number of Lots 1 1 Lot Acreage in SF 11,010 sf 11,010 sf Soil Type(s) GM, GC, SM, SC soils/ ROCK Site Sediment Transport Score (High\Low) >100 Depth to Ground Water Table (Feet and Inches) See completed Soils Analysis Volume 1, Chapter 3.1.1 Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Infiltration Rate during Rainy Season Inch\Per Hour Impervious Surface on-site Majority of lot predominantly rock 5,266 SF Impervious Surface off-site New and Replaced Hard Surface Total SF 5,266 sf Lot Coverage (Percentage) 25.2% BMP (Required Minimum Requirement 5) BMP T5.13 Post Construction Soils Water Quality Method Minimum Requirement 6 Water Quantity Method Minimum Requirement 7 Existing Site Conditions Summary: (Additionally, provide information on previous permits, if any, like Grade and Fill, Clear and Grade, topography, vegetation, drainage, Critical Areas adjacent to the site and how it may affect this project if soils are disturbed, Soils Type (Included in Soils Analysis Report), Erosion Problem Areas, Construction PhasinglSequence) • The 11,010 square foot site was developed under the Rock Ridge Phase IV project. The lot is currently mostly cleared and grass covered. The lot slopes down from the street at Rock Ridge Parkway east to west. The upper portion of the site near rock ridge parkway slopes at an average of 27.8%. • The site is part of of a common plan development. The development has the detention pond upsized for flow control fot Rock Ridge Phase 3. The report is part of the recorded subdivision and covered in Minimum Requirements 1,3,4,5,6,7,8,and 9 for each lot. This project is submitting Minimum Requirement 2. • A soils analysis has been completed for this site. It is mostly rock, but was used for the soil stockpile location of the development. The soil analisis shows no amendments needed. It is included under APPENDIX 2 • Construction Plan Sequencing (Note: sequence may not fall in this order, but close) o Installation of Erosion and Sedimentation BMP's. o Minor rock excavation work to ensure compliance with required BMP's under Minimum Requirement 5 and 6. o Installation of the footings and foundations. o Construction of the home. o Connection of the utilities to the home. o Installation of MR#5 required BMP's o Backfill of site with BMP T5.15 Post Construction Soils, Landscaping, driveway, driveway access. See Appendix-Model Soil Management Plan for BMP T5.13 Developed Conditions Summary: (Additionally, to be shown on the site plan. Identify cut and fill areas, proposed slopes of all hard surfaces , proposed contours) see site plan for contours Drainage Basin (2007 Storm Comp Plan — City website\publicworks\engineering\comprehensive plans): What Drainage Basin are you in? G8 Identify any downstream drainage issues (Storm Comp Plan: Yes, Identified If so, describe: Problem Area #13—Oaks Avenue and Georgia Avenue Problem: A natural depression exists on a parcel that will soon be developed. A pipe drains the depression to the North side of Oakes Ave. Solution: Install a trash rack like that described for Area #5 to keep pipe inlet clear of debris. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Response: The natural depression was filled in revising the natural drainage path for this parcel insofar as raising the elevation. The natural discharge is still at the same location.This issue has bee resolved with development and does not affect this project. Problem Area#28—Kansas Ave. and West 6tn Street Problem:A shallow manhole is located at the intersection. Solution: The City has preliminary plans for the new storm system in this area. The new system will divert existing flows to Illinos Ave. The downstream system should be analyzed for capacity Complete the Applicability Requirements — Flow Chart (Figure 1-2.4.1 Attached, Figure 1-2.4.2 Attached and Figure 1-2.5.1 Attached) - Highlight the path and attach Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Bart Here Does tt+,sne rLavr 35% Yes See Redeve+ n*m k n,r wi WrWOM LM gage? 1 FIgvry l-Z4-4 No Does the project convem AGr*S Of Moore of vevrman !a Does the prnjeot result in lawn or lark wiped areas, or 5.DW- 5 0 �rye feet or No comett 2.5 or r��of gmazsr, of new.--- native vegetatiw tC pasha*--"repl d hard 4ac aria" No Yes Yes Does the prq'ect resuO in 2,I K"re or greater, of now plus A!l Minimum Requirements repL!U� hard SUrlarCk-_ aMkO7 apply to the new and replaced lard surfaces and converted Yes No veg-p[ation areas. Daes w pMect have rand Minxnum Requirwments #1 d!s1Lirtmf!w jchwbes of 7,(OQ through #5 appfy to the v*WF Yes squa►e -eet o:r grieater7 and rvpia(--&d hafd suifwe3 and the land disturbed_ o Minimum Requvemen102 applies. Figure 1{ _ -1 Flog h rt for Determining Requirements t for New Development DEPARTMENT OF �ilfr�►�d�uee�£I+� ECOLOGY r G+ 1 "filnito!t rnr7.�on ±I'll,*lll't Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Does I"proliq3resuit n.", v;uare ANK or mores_&rpm plus repl3oeo hard surface ama'� OR Does t1m L" twV aav+ ty IaW 7,00O square feet zr-1raea*-erl des No M,'itrTm fro R uwagr n m*I dv%kMjh 15 apply to th*rrm and gWwod hard Min inium Requirement 02 applie& surfaces and 1hw UM destxxtped- Quesfim Does the pro±w add 5.000 squam feet or mores cd rww hard wrEmms' OR Conven 31•1 aaew or mcm of% bqn w wrwn or Lardscaped amxs OR V"t 2z a or M*P@ of tam to PASW-0 IF Yes No All Min imuam Requirements apply Kea QLWFK" 15 ti„�6 a road to ttw new hard surfaces and the reia#ed Wit- No converte-d veWtation areas. es 11 n iuru req_ are ta}:en come-of b- k4K or mere of n*w hard surfs ms'� commoa plain of de-t-elognient. Only. min rill iup req_# 2 is needed. s the wtal of raw plus mpkxCe�d�wd surfs Do t.1, n-ew "rd 5,1300 squara feet or n%am, !rur*aces add 50%or NO N AND more 10 tMe exis*ng " adement l does thaw vW"of the proposed wr4wa�rwrse+as hard st,rfaces w+ in rlgkJlrlR1�lnt3, -m&o* g men or irnpmvemem --eitceed tine prgect "Traits? 5 4 of the as seed vaj for ant Yam }at die,tT Vnn = '^'nra-.--me Vey All Mmirrrr RegWrements apply to the n" and replaced hard surfaces and conversed gelation areas Yes FIBMr 1-2-4-2 Flow Chart for Determining Requirements for Redevelopment DERARTMEI''+IT OF RWrMeaJuneNIS ECOLOGY y'3t G' �*;d8hlrlift$.1 r i=ar EA i= -1.am d!warrw. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 woes the :,sect alscharge to Flow Control ExeTot Wa:e's goer IVIr mum RequIrerrent :MR I# Yes REQUIRED:Implement the foilowrig BMPs No where feasible: • BMP T5.13: Post-Construction Son Qualy No :ne and Depth Dces:re oropc- oro ect • BMP T5.10A,8,or C: Downspout Full tngger"Iy MRs 91 - triggered "ill Downspout Dispersion *57 IPer Flgure 3.2 or oily uR;=21 No additional Js:erns.or Perforated Stut>-out Fgure 3.3 In Appendix Connectons 1 of:re 2013-2018 requirements • EMP T5.11 or T5.12:Concentl3tea Fi(yY '1WiA Phase II Permit Dispersion or Sneet Flow Dlspetsron 8 Phase I Permit). NOT REQUIRED:AcNevement of the LID No i:tne project tnggerea Performance standard.Applying the other Yes BMPs In Ust 91 Or LISt P2. only MRs�t - 5j Is the F oje�--Inside:h? JGA' ►a :re Drib ect cevektper choose to meet -le LID Per'armanoe Standard? Yes No Is the project on a parcel No of 5 acres or larger? REQJiRE:;. For each DIJ:he pm ec:aevelooer Np Yes surface, cons der the choose to meet the LID BMPs In the order Perfornance Standard' REQUIRED: Meeq the Ll: listed In List#1 for:hat Performance Standard Mroogh type of surface. JSe Yes the use of any 8MP(s)In the the first BMP that s 2014 SWMMWW except fix considered feaslt.e. Yes,:' No Raln Gardens the use of Bloretention Is acceptable NOT REQUIRED. Achievement of the LID if the project can't most the Performance Standard. REQUIRED: For each LID Performance Standard, It surface,consider:he BMPs must seek and be granted an REQUIRED: Meet:he Performance In the order fisted i _16t;r2 exceptionWrlance. Standard through the use Vary B u P�s l In for that ty oe of s,uta c e ACT e the 2014 SWMMWW excect for R3 - -3'dens :ne W.ENP that Is -=-JIRED:Apply BMP T5.13 I.the use of oioretentlor Is axep a,l I considered leas ble. = ,st-Corstruc0on Sol Qualrtyr and Depth. REQUIRED for aroiects TrMernC MR -a NOT REQUIRED: Apply BMP T5.13 Post Construnon Sc AcnleveTent of the LID 40T REQUIRED:Applying the Qualfiy and Depth. Performance Standard. 5MPs In List*1 or Ust V2. NOT REQUIRED:ApMing the BMPs'n -Is*. $1 or Llst tr2. Recamrn --iaeJ oy Ecology for p-o)en:rgge-tng NRs 41 -95 Figure 1-2.11-:1. -1 40 Flow (-~hart for Determining LICE MR #5 Requirements DEPARTMENT C� Revised June 20 ECOLOGY Please see nrrp.A"w ecy.Na.gowtocy,'or,-,h"n�for oopyng—it nonc.Incli.ding permissions. :!ate of Wastiington mltawr of liability,and dlsciahrer. version uaie: uciooer t, zu ly rrevlous version uaie: reoruary zu, zuTa TAB 2 (MINIMUM REQUIREMENT #2) • 1-2.5.2 Minimum Requirement#2 — Construction Stormwater Pollution Prevention Plan (SWPP) - All projects are required to complete Minimum Requirement 2. - Refer to the 13 Elements of the SWPP (See document below, complete and attach) - See attached Table 4.1.1, Table 4.2.1 and Table - Provide Engineering Calculations as an attachment for Sediment Ponds\Traps, Diversions, Waterways and Runoff/Stormwater Detention Calculations. The site was developed under Rock Ridge Phase 4, which had all the appropriate permits and has been accepted by the City of Anacortes City Council and recorded. The site is sloping mostly from the East dow. to the West. The average sloping grade is around 27.6%to 49.7%for most of the lot with steeper slope at West edge. This site is part of a Common Plan of Development. The development had the detention pond upsized for flow control for both Rock Ridge Phase 4 and 5. This was accepted April 12, 2018. The report is part of the recorded subdivision and covered Minimum Requirements 1, 3, 4, 5, 6, 7, 8 and 9 for each lot. Therefore, this project is submitting Minimum Requirement 2 only A soils analysis has been completed for this site. According to the United States Department of Agriculture(USDA) Natural Resource Conservation Service(NRCS)Soil Survey website, soils within Lots 1 through 4 and the western portions of Lots 5 and 6 are mapped as Whistle-Fidalgo-Rock outcrop complex(30 to 65 percent slopes). Soils within Lots 7 and 8 and the eastern portions of Lots 5 and 6 are mapped as Fidalgo-Lithic Xerochrepts-Rock outcrop complex(3 to 30 percent slopes) The soil analisis shows no amendments needed. It is included under APPENDIX 2. There are no known critical areas adjacent to this property that would offer any concern by building on this property, or any Erosion problems by building on this site. See attached 13 Elements of a Construciton SWPPP. The Site Plan will be added to the Appendix 4. BMP C162 Scheduling: Construction Sequencing:(Note:sequence may not fall in this order, but close) o Installation of Erosion and Sedimentation BMP's. o Minor rock excavation work to ensure compliance with required BMP's under Minimum Requirement 5 and 6. o Installation of the footings and foundations. o Construction of the home. o Connection of the utilities to the home. o Installation of MR#5 required BMP's o Backfill of site with BMP T5.15 Post Construction Soils, Landscaping, driveway, driveway access. See Appendix-Model Soil Management Plan for BMP T5.13 Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Table 4.1.1 Source Control BMP's by SWPPP Element Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Element#1 Element#2 Element#5 Element#6 Element#9 Element#11 Element#12 Element#13 BMP or Element Name Preserve Establish Stabilize Protect Control Maintain Manage the Protect Low Vegetation/Mark Construction Soils Slopes Pollutants BMPs Project Impact Clearinq Limits Access Development BMP C101: Preserving Natural Vegetation ✓ BMP C102:Buffer Zones ✓ ✓ BMP C103:High Visibility Plastic or Metal ✓ ✓ Fence BMPC105: Stabilized Construction ✓ Entrance/Exit BMP C106: Wheel Wash ✓ BMP C107: Construction Road/Parking ✓ Area Stabilization BMP C120:Temporary and Permanent ✓ ✓ Seeding BMP C121: Mulching ✓ ✓ BMP C122: Nets and Blankets ✓ ✓ BMP C123: Plastic Covering ✓ BMP C124: Sodding ✓ BMP C125: Topsoiling/Composting ✓ BMP C126: Polyacrylar ide for Soil Erosion ✓ Protection BMP C130: Surface Roughening ✓ ✓ BMPC131: Gradient Terraces ✓ ✓ BMPC140: Dust Control ✓ BMP C150: Materials On Hand ✓ ✓ BMP C151: Concrete Handling ✓ BMP C152: Sawcutting and Surfacing ✓ Pollution Prevention BMP C153: Material Delivery,Storage and ✓ Containment BMP C154: Concrete Washout Area ✓ BMP C160: Certified Erosion and ✓ ✓ Sediment Control Lead BMP C162:Scheduling ✓ Table 4.2.1 Runoff Conveyance and Treatment BMP's by SWPPP Element Version Date: October 7, 2019 Previous Version Date: February 20, 2019 6@Mm t L Element 08 Element W13 ElementA ElementA6 ElementM7 EienrrrtK9 ENrrrrrnt>;10 Install Stabilize Protect Low BMP a Element Nm Ca►trol 8edirr>B*u Protect MatedChannois Control Control De- Impact Fkwr Rates Slopes Drain Inlets Paautants waterli controls and Outlets 'X-ruloWnent OUP C200: lntsrceplor Dike and Svmle ✓ ✓ SUP C201: Grass-lened Chamiels ✓ EIAIP C202:Channel LlnkV ✓ POP C203: Wator Bars ✓ ✓ I BMP C204: Pipe Slope Drams ✓ UDAP C206: Subsurface Drains ✓ BMP C206: Level Spreader ✓ HMP C207: Check Dams ✓ ✓ BMP C209: Triangular Silt Dike(Goolextie ✓ ✓ Encased Check Derr4 6MP C209: Oudet Proleclion ✓ BMP C220: Storm Drain Inlet Protedlon ✓ BMP C231: Brush Barrier ✓ ✓ BMP C232: Oravel Flllrrr Berm ✓ 6MP C233: Sit Fence �/ ✓ BMP C234: Vegetated Strip ✓ ✓ BMP C23lf: Wittas ✓ BMP C236-Vagitetive Filtration ✓ 8MP C240: Sodimont Trap ✓ ✓ BMP C241: Temporary gedirmnt Pond ✓ ✓ BMP C251k Conslruc loa Stonnee"r Vol Chwr:lcal Treatnknt BMP C261:Construction Stormheler Fillration BMP C252 Hip pH Neulralizatlon Using ✓ CO2 BMP C263:pH Control for High pH VWter ✓ 13 Elements of SWPPP Version Date: October 7, 2019 Previous Version Date: February 20, 2019 (Construction Stormwater Pollution Prevention Plan) Please check off boxes to show that each element has been read and understood. Provide details where applicable and if certain aspects are unnecessary or exempt, clearly justify. Details of the 13 Elements and the correlating BMPs are listed Above from the 2014 Stormwater Management Manual for Western Washington (SWMMWW). A link is provided on the City of Anacortes website, under Planning, Community, & Economic Development Department, as well as under Stormwater on the Engineering Division of Public Work's page. Owner Name: Jeff& Lori Zumwalt Site Address: 3928 Rock Ridge Parkway, Anacortes, WA 98221 Prepared By: Jason Sterling The Stormwater checklist or building permit determined that: The 13 elements must be addressed X These elements must be for construction activity adding under addressed for construction activity 2,000 sq. ft. of hard surface area. adding 2,000 sq. ft. or more of hard surface area. This means that an attached narrative and site plan are required with this document. Under each element, provide the BMP's that will be applicable to your project. Use the attached Tables provided. ELEMENT 1: Preserve Vegetation/Mark Clearing Limits ❑ Before beginning land disturbing activities, including clearing and grading, clearly mark all clearing limits, sensitive areas and their buffers, and trees that are to be preserved within the construction area. Retain the duff layer, native top soil, and natural vegetation in an undisturbed state to the maximum degree practical. Site was cleared in approximately 2010 prior to the construction of Rock Ridge Phase IV being constructed.There was minimal vegetation or trees to clear on this lot in particular. A rockfall-drapery mesh system supported by I-beams and cables existed within the western portion of and along the top of the bedrock cliff face within lots 3, 4, 5 and 6.The drapery-mesh appeared to have been constructed to attenuate energy associated with falling rocks from the cliff face and reduce rock fall or topple hazards to the residences located below and to its west. ELEMENT 2: Establish Construction Access ❑ Limit construction vehicle access and exit to one route, if possible. ❑ Stabilize access points with a pad of quarry spalls, crushed rock, or other equivalent BMPs, to minimize tracking onto roads. ❑ Locate wheel wash or tire baths on site, if the stabilized construction entrance is not effective in preventing tracking sediment onto roads. ❑ If sediment is tracked off site, clean the affected roadway thoroughly at the end of each day, or more frequently as necessary (ex: wet weather). Remove sediment from roads by shoveling, sweeping, or pick up and transport the sediment to a controlled sediment disposal area. ❑ Conduct street washing only after sediment is removed in accordance with the above bullet. ❑ Control street wash wastewater by pumping back on site or otherwise preventing it from discharging into systems tributary to waters of the State. We will utilize BMP C107 Construction Road�Parking Area Stabilization. The installation and maintenance specifications are attached to the 13 Elements. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 ELEMENT 3: Control Flow Rates ❑ Protect properties and waterways downstream of development sites from erosion and the associated discharge of turbid waters due to increases in the velocity and peak volumetric flow rate of stormwater runoff from the project site. ❑ Where necessary to comply with the bullet above, construct stormwater retention or detention facilities as one of the first steps in grading. Assure that detention facilities function properly before constructing site improvement (e.g. impervious surfaces). ❑ If permanent infiltration ponds are used for flow control during construction, protect these facilities from siltation during the construction phase. Since the site is solid rock with a layer of soil on top of the rock,The site will utilize BMP C162 Scheduling to help with flow control. Gutters will be installed with temporary downspouts to the gutter downspout piping to convey any potential increase in runoff away from the site. The project will utilize existing BMP C233 Silt Fence along the north, west, south, and east boundary. Additionally,the project will utilize BMP C212 Mulching along the north, east, and south boundaries, along with BMP C235 Wattles if necessary. The site is sloping mostly from the East to the West.The average sloping grade is around 26%to 55%for most of the lot with steeper slope at West edge. If BMP C240 is necessary,the proposed location will be in the north/east portion of the lot, near bottom of slope.This BMP will need to be designed and reviewed by the COA prior to implementation. ELEMENT 4: Install Sediment Controls ❑ Design, install, and maintain effective erosion controls and sediment controls to minimize the discharge of pollutants. ❑ Construct sediment control BMPs (sediment ponds, traps, filters, etc.) as one of the first steps in grading. These BMPs shall be functional before other land disturbing activities take place. ❑ Minimize sediment discharges from the site. The design, installation and maintenance of erosion and sediment controls must address factors such as the amount, frequency, intensity and duration of precipitation, the nature of resulting stormwater runoff, and soil characteristics, including the range of soil particle sizes expected to be present on the site. ❑ Direct stormwater runoff from disturbed areas through a sediment pond or other appropriate sediment removal BMP, before the runoff leaves a construction site or before discharge to an infiltration facility. Runoff from fully stabilized areas may be discharged without a sediment removal BMP, but must meet the flow control performance standard in Element#3, bullet#1. ❑ Locate BMPs intended to trap sediment on-site in a manner to avoid interference with the movement of juvenile salmonids attempting to enter off-channel areas or drainages. ❑ Provide and maintain natural buffers around surface waters, direct stormwater to vegetated areas to increase sediment removal, and maximize stormwater infiltration. ❑ Where feasible, design outlet structures that withdraw impounded stormwater from the surface to avoid discharging sediment that is still suspended lower in the water column. The sediment controls have been identified on the site plan and are included in Appendix 4 of this report. BMP's that will be on-site for additional protection are:BMP C235 Straw Wattles, BMP C240 Temporary Sediment Trap (if necessary). ELEMENT 5: Stabilize Soils ❑ Stabilize exposed and unworked soils by application of effective BMPs that prevent erosion. Applicable BMPs include, but are not limited to: temporary and permanent seeding, sodding, mulching, plastic covering, erosion control fabrics and matting, soil application of polyacrylamide (PAM), the early application of gravel base early on areas to be paved, and dust control. ❑ Control stormwater volume and velocity within the site to minimize soil erosion. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Control stormwater discharges, including both peak flow rates and total stormwater volume, to minimize erosion at outlets and to minimize downstream channel and stream bank erosion. ❑ Soils must not remain exposed and unworked for more than the time periods set forth below to prevent erosion. o During the dry season (May 1 — Sept 30): 7 days o During the wet season (Oct 1 —Apr 30): 2 days ❑ Stabilize soils at the end of the shift before a holiday or weekend if needed based on the weather forecast. ❑ Stabilize soil stockpiles from erosion, protect with sediment trapping measures, and where possible, be located away from storm drain inlets, waterways, and drainage channels. ❑ Minimize the amount of soil exposed during construction activity. ❑ Minimize the disturbance of steep slopes. ❑ Minimize soil compaction and, unless infeasible, preserve topsoil. Exposed stock piles will be covered with BMP C123 Plastic Covering and other exposed areas with BMP C121 Mulching. ELEMENT 6: Protect Slopes ❑ Design and construct cut-and-fill slopes in a manner to minimize erosion. Applicable practices include, but are not limited to, reducing continuous length of slope with terracing and diversions, reducing slope steepness, and roughening slope surfaces (Ex: track walking). ❑ Divert off-site stormwater (run-on) or ground water away from slopes and disturbed areas with interceptor dikes, pipes, and/or swales. Off-site stormwater should be managed separately from stormwater generated on the site. ❑ At the top of slopes, collect drainage in pipe slop drains or protected channels to prevent erosion. o `Temporary pipe slope drains must handle the peak volumetric flow rate calculated using a 10- minute time step from a Type 1A, 10-year, 24-hour frequency storm for the developed condition. Alternatively, the 10-year, 1-hour flow rate predicted/indicated by an approved continuous runoff model, increased by a factor of 1.6, may be used. The hydrologic analysis must use the existing land cover condition for predicting flow rates from tributary areas outside the project limits. For tributary areas on the project site, the analysis must use the temporary or permanent project land cover condition, whichever will produce the highest flow rates. If using the Western Washington Hydrology Model (WWHM) to predict flows, bare soil areas should be modeled as "landscaped" area. o Where 15-minute time steps are available in an approved continuous runoff model, they may be used directly without a correction factor. ❑ Place excavated material on the uphill side of trenches, consistent with safety and space considerations. ❑ Place check dams at regular intervals within constructed channels that are cut down a slope. ❑ Consider soil types and its potential for erosion. ❑ Stabilize soils on slopes, as specified in Element 5. BMP combinations are the most effective method of protecting slopes with disturbed soils. Ex: Use both mulching and straw erosion control blankets. The Natural Discharge location will be protected by BMP C233 Silt Fence. ELEMENT 7: Protect Drain Inlets ❑ Protect all storm drain inlets made operable during construction so that stormwater runoff does not enter the conveyance system without first being filtered or treated to remove sediment. ❑ Clean or remove and replace inlet protection devices when sediment has filled one-third of the available storage (unless a different standard is specified by the product manufacturer). ❑ Where possible, protect all existing storm drain inlets so that stormwater runoff does not enter the Version Date: October 7, 2019 Previous Version Date: February 20, 2019 conveyance system without first being filtered or treated to remove sediment. ❑ Keep all approach roads clean. Do not allow sediment and street wash water to enter storm drains without prior and adequate treatment unless treatment is provided before the storm drain discharges to waters of the State. ❑ Inlets should be inspected weekly at a minimum and daily during storm events. Inlets will be protecting using BMP C220.A Supplement detail will WSDOT Standard Detail 1-40.20-00 Storm Drain Inlet Protection since DOE does not have an equivalent detail to use. ELEMENT 8: Stabilize Channels and Outlets Design, construct, and stabilize all on-site conveyance channels to prevent erosion from the following expected peak flows: o *Channels must handle same peak volumetric flow rate as temporary pipe slope drains listed in Element 6, above. ❑ Provide stabilization, including armoring material, adequate to prevent erosion of outlets, adjacent streambanks, slopes, and downstream reaches at the outlets of all conveyance systems. ❑ The best method for stabilizing channels is to completely line the channel with a blanket product first, then add check dams as necessary to function as an anchor and to slow the flow of water. The Natural Discharge location will be protected by BMP C233 Silt Fence. ELEMENT 9: Control Pollutants ❑ Design, install, implement, and maintain effective pollution prevention measures to minimize the discharge of pollutants. Handle and dispose of all pollutants, including waste materials and demolition debris that occur on-site in a manner that does not cause contamination of stormwater. ❑ Provide cover, containment, and protection from vandalism for all chemicals, liquid products, petroleum products, and other materials that have the potential to pose a threat to human health or the environment. On-site fueling tanks must include secondary containment. Secondary containment means placing tanks or containers within an impervious structure capable of containing 110% of the volume contained in the largest tank within the containment structure. Double-walled tanks do not require additional secondary containment. Conduct maintenance, fueling, and repair of heavy equipment and vehicles using spill prevention and control measures. Clean contaminated surfaces immediately following any spill incident. ❑ Discharge wheel wash or tire bath wastewater to a separate on-site treatment system that prevents discharge to surface water, such as closed-loop recirculation or upland land application, or to the sanitary sewer, with local sewer district approval. Wheel wash or tire bath wastewater should not include wastewater from concrete washout areas. ❑ Apply fertilizers and pesticides in a manner and at application rates that will not result in loss of chemical to stormwater runoff. Follow manufacturers' label requirements for application rates and procedures. ❑ Use BMPs to prevent contamination of stormwater runoff by pH-modifying sources. The sources for this contamination include, but are not limited to: bulk cement, cement kiln dust, fly ash, new concrete washing and curing waters, waste streams generated from concrete grinding and sawing, exposed aggregate processes, dewatering concrete vaults, concrete pumping, and mixer washout waters. Adjust the pH of stormwater if necessary to prevent violations of the water quality standards. ❑ Assure that washout of concrete trucks is performed off-site or in designated concrete washout areas only. Do not wash out concrete trucks onto the ground, or into storm drains, open ditches, streets, or streams. Do not dump excess concrete on site, except in designated concrete washout areas. Concrete spillage or concrete discharge to surface waters of the State is prohibited. Do not use upland land applications for discharging wastewater from concrete washout areas. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 ❑ Obtain written approval from Ecology and provide to the City before using chemical treatment other than CO2 or dry ice to adjust pH. ❑ Woody debris may be chopped and spread on site. ❑ Conduct oil changes, hydraulic system drain down, solvent and de-greasing cleaning operations, fuel tank drain down and removal, and other activities which may result in discharge or spillage of pollutants to the ground or into stormwater runoff using spill prevention measures, such as drip pans. ❑ Clean contaminated surfaces immediately following any discharge or spill incident. Emergency repairs may be performed on-site using temporary plastic placed beneath and, if raining, over the vehicle. All chemicals, liquid products, petroleum products, solvents and other potentially environmental hazardous products will be locked in the site job trailer. BMP C154 Concrete Washout Area will be utilized.A Concrete Washout area has been installed within the Rock Ridge Phase IV and V subdivision. No fueling or oil changes are being performed on-site. Contractor will be required to have a Spill Kit on-site that is accessible by all workers on the project. ELEMENT 10: Control De-Watering ❑ Discharge foundation, vault, and trench dewatering water, which have characteristics similar to stormwater runoff at the site, into a controlled conveyance system before discharge to a sediment trap or sediment pond. ❑ Discharge clean, non-turbid de-watering water, such as well-point ground water, to systems tributary to, or directly into surface waters of the State, as specified in Element 8, provided the de-watering flow does not cause erosion or flooding of receiving waters or interfere with the operation of the system. Do not route clean dewatering water through stormwater sediment ponds. Note that "surface waters of the State" may exist on a construction site as well as off site; for example, a creek running through a site. ❑ Handle highly turbid or contaminated dewatering water separately from stormwater. ❑ Other treatment or disposal options may include: 1. Infiltration 2. Transport off-site in a vehicle, such as a vacuum flush truck, for legal disposal in a manner that does not pollute state waters. 3. Ecology-approved on-site chemical treatment or other suitable treatment technologies. 4. Sanitary or combined sewer discharge with local sewer district approval, if there is no other option. 5. Use of a sedimentation bag with outfall to a ditch or swale for small volumes of localized dewatering. ❑ Construction equipment operation, clamshell digging, concrete tremie pour, or work inside a cofferdam can create highly turbid or contaminated dewatering water. ❑ Discharging sediment-laden (muddy) water into waters of the State likely constitutes a violation of water quality standards for turbidity. The easiest way to avoid discharging muddy water is through infiltration and preserving vegetation. Site is solid rock. No Dewatering is anticipated ELEMENT 11: Maintain BMPs ❑ Maintain and repair all temporary and permanent erosion and sediment control BMPs as needed to assure continued performance of their intended function in accordance with BMP specifications. Remove all temporary erosion and sediment control BMPs within 30 days after achieving final site stabilization or after the temporary BMPs are no longer needed. Some temporary erosion and sediment control BMPs are bio-degradable and designed to remain in place following construction such as Version Date: October 7, 2019 Previous Version Date: February 20, 2019 compost socks. ❑ Provide protection to all BMPs installed for the permanent control of stormwater from sediment and compaction. All BMPs that are to remain in place following completion of construction shall be examined and placed in full operating conditions. If sediment enters the BMPs during construction, it shall be removed and the facility shall be returned to the conditions specified in the construction documents. Remove or stabilize trapped sediment on site. Permanently stabilize disturbed soil resulting from removal of BMPs or vegetation. See Element 3 above for additional BMPs that will be on hand for additional runoff measures. BMP's will be reviewed and inspected daily and revised accordingly. ELEMENT 12: Manage the Project— Projects subject to Minimum Requirements 1-9 must have a Certified Erosion and Sediment Control Lead (CESCL)for site inspections. Projects subject to Minimum Requirements 1-5 do not require the inspector to be certified. By the initiation of construction, the SWPPP must identify the CESCL or inspector, who shall be present on-site or on-call at all times. ❑ Phase development projects to the maximum degree practicable and take into account seasonal work limits to prevent soil erosion and prevent transporting sediment from the site during construction. Inspection and monitoring — Inspect, maintain, and repair all BMPs as needed to assure continued performance of their intended function. ❑ Maintain, update, and implement the SWPPP. ❑ Clearing and grading activities for developments shall be permitted only if conducted using an approved site development plan (e.g., subdivision approval). ❑ From Oct 1 through Apr 30, clearing, grading, and other soil disturbing activities is permitted only if shown that the site operator will prevent silt-laden runoff from leaving the site through a combination of the following: 1. Site conditions including existing vegetative coverage, slope, soil type, and proximity to receiving waters. 2. Limit activities and the extent of disturbed areas. 3. Proposed erosion and sediment control measures. Weather conditions can influence the seasonal limitation on site disturbance. The City of Anacortes has the authority to take enforcement action per AMC 19.76 Stormwater. ❑ The following activities are exempt from the seasonal clearing and grading limitations: 1. Routine maintenance and necessary repair of erosion and sediment control BMPs; 2. Routine maintenance of public facilities or existing utility structures that do not expose the soil or result in the removal of the vegetative cover to soil 3. Activities where there is 100% infiltration of surface water runoff within the site in approved and installed erosion and sediment control facilities. Since this lot is part of a Common Plan of Development a qualified CESCL will be on-site. A sign will be posted on-site with a name and 24-hour number. ELEMENT 13: Protect Low Impact Development BMPS ❑ If implementing any bioretention facilities or rain gardens, refer to the applicable BMP sections of the Manual for requirements. There is no Low Impact Development BMP's proposed with this project. 12/23/2022 Applicant Aignature Date Version Date: October 7, 2019 Previous Version Date: February 20, 2019 APPENDIX 1 —Survey performed by a Professional Land Surveyor The object of this appendix is to ensure that the property has a minimum of 3 out of 5 property corners visible to ensure that the structures are placed within the required setbacks. 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HERRIGSTAD P.E., P.L.S. PO Box 319 4320 WHISTLE LAKE ROAD Prt---® f i Ie Anacortes, WA 98221 ANACORTES, WA 98221 (360) 299-8804 APPENDIX 2 —Soils Anaylsis (Volume 1, Chapter 3.1.1) - Attached Version Date: October 7, 2019 Previous Version Date: February 20, 2019 PAP-Accredited Northwest Agricultural Consultants RR SUMMIT NW, LLC 2545 West Falls PO BOX 319 Kennewick,WA 99336 ANACORTES, WA 98221 (509) 783-7450 Fax: (509) 783-5305 4k 2016 SOIL Client No.: 11396 Date Received: 03-13-2017 Report No.: 40544 Page: 1 of 1 33251f-58756 Grower Sampler Field No. Field Name Crop Year Crop Yield Goal Strandberg Depth Available NO3-N NH4-N Sulfur pH Soluble Organic P(bic) K(bic) P(ace) K(ace) Calcium Magne- Sodium Eff. Boron Zinc Manga- Iron Copper CEC %Base Chloride Bray 1P Total Samplel (ft.) Inches Ibs/acre Ibs/acre ppm Salts Matter ppm ppm ppm ppm (meq. sium (meq. ppm ppm nese ppm ppm (meq. Sat. lbs.per. ppm Bases D (mmhos Percent per 100 (meq. per 100 ppm per 100 acre (meq. /cm) grams) per 100 grams) grams) per 100 grams) grams) 1 7.69 24.5 Total 0.00 Estimated Nitrogen Release from Organic Matter Estimated Total Nitrogen Available to Crop Last Year's Crop Fertilizer Comments CEC Method: EPA 9081 OM Method: Loss on Ignition APPENDIX 3 — Model Soil Management Plan for BMP T5.13 An alternate document acceptable to the City of Anacortes is a Test Report provided by the Soils Supplier that identifies the soils to be used meet the specifications outlined under Minimum Requirement 5. The specifications are in both WSDOT and CSI Formats. For specifications, refer to the above referenced PDF. This submittal can be a deferred submittal since most projects are not sure who the supplier will be at the time of building permit application. For projects that trigger Minimum Requirements 1 through 5, the Test Report will be provided to the Building Department. Projects triggering Minimum Requirements 1 through 9, the Test Report will be provided to the Engineering Department. BMP T5.13 to be a deffered submittal, to be completed at final grading Version Date: October 7, 2019 Previous Version Date: February 20, 2019 DEFERRED SUBMITTAL: PROVIDE A TEST REPORT FROM SOILS SUPPLIER TO THE BUILDING DEPT. PROJECT INFORMATION "Model Soil Management Plan for BMP T5.13" age# of pages Com lete all information on page 1;only site address and permit number on additional pages. Site Address/Lot No.: Permit Type: Permit Number: Permit Holder: Phone: Mailing Address: Contact Person: Phone: Plan Prepared By: ATTACHMENTS REQUIRED Check off required items that are attached to thisplan) Site Plan showing,to scale: Areas of undisturbed native vegetation(no amendment required) New planting beds and turf areas(amendment required) Type of soil improvement proposed for each area Soil test results(required if proposing custom amendment rates Product test results for proposed amendments AREA# (should match Area#on Site Plan) PLANTING TYPE Turf Undisturbed native vegetation Planting Beds Other: SQUARE FOOTAGE OF THIS AREA: square feet SCARIFICATION inches(depth)of scarification needed to achieve finished total 12"loosened depth. Subsoil will be scarified PRE-APPROVED inches of compost or imported topsoil applied AMENDMENT METHOD: X 3_1 (conversion factor, inches to cubic yards) PRODUCT: Topsoil import =cu.yards per 1,000 sq. ft. Amend with compost X ,000s sq.ft.in this area Stockpile and amend =cubic yards of amendment QUANTITY: CU.YDS. cu.yds. stockpiled) needed to cover this area to designated depth) CUSTOM AMENDMENT Attach test results and calculations. _Topsoil import inches organic matter or topsoil import PRODUCT: _Topsoil&compost lift X 3.1 _Amend =cu.yards/ 1,000 sq. ft. _Stockpile and amend X _,000s sq.ft. in this area ( cu.yds.stockpiled) =cubic yards of amendment -> -> QUANTITY: CU.YDS. MULCH _,000 sq.ft. PRODUCT: X 6.2 (conversion, to give 2 inch mulch depth) =cubic yards of mulch —>--+—>--+--+--+ QUANTITY: CU.YDS. TOTAL AMENDMENT/TOPSOIL/MULCH FOR ALL AREAS (complete on page 1 only, totaling all areas/ a es in this Plan ❑ Product#1: ❑ Quantity: cu.yds. ❑ Test Results: %organic matter C:N ratio<25:1 exce t mulch,or<35:1 for nativeplants) "stable" es/no ❑ Product#2: ❑ Quantity: cu.yds. ❑ Test Results: %organic matter C:N ratio<25:1 exce t mulch,or<35:1 for nativeplants) "stable" es/no ❑ Product#3: ❑ Quantity: cu.yds. ❑ Test Results: %organic matter C:N ratio<25:1 (except mulch,or<35:1 for nativeplants) "stable" es/no Date: Inspector: Approved: Revisions Required: Date: Inspector: Approved: Revisions Required: Version Date: October 7, 2019 Previous Version Date: February 20, 2019 APPENDIX 4 — Determining Construction Site Sediment Damage Potential (Appendix 7— NPDES Phase II Permit) Note: See attached. All projects within the City of Anacortes are required to complete that document under Appendix 4. Western Washington Phase H Stormwater Permit Version Date: October 7, 2019 Previous Version Date: February 20, 2019 i. APPENDIX 7 - Determining Construction Site Sediment Damage Potential The following rating system allows objective evaluation of a particular development site's potential to discharge sediment. Permittees may use the rating system below or develop alternative process designed to identify site-specific features which indicate that the site must be inspected prior to clearing and construction. Any alternative evaluation process must be documented and provide for equivalent environmental review. Step one is to determine if there is a sediment/erosion sensitive feature downstream of the development site. If there is such a site downstream complete step two, assessment of hydraulic nearness. If there is a sediment/erosion sensitive feature and it is hydraulically near the site then go to step three to determine the construction site sediment transport potential. ii. STEP 1 — Sediment/Erosion Sensitive Feature Identification Sediment/erosion sensitive features are areas subject to significant degradation due to the effect of sediment deposition or erosion. Special protection must be provided to protect them. Sediment/erosion sensitive features include but are not limited to: i. Salmonid bearing fresh water streams and their tributaries or freshwater streams that would be Salmonid bearing if not for anthropogenic barriers; ii. Lakes; iii. Category I, II, and III wetlands; iv. Marine near-shore habitat; V. Sites containing contaminated soils where erosion could cause dispersal of contaminants; and vi. Steep slopes (25% or greater) associated with one of the above features. Identify any sediment/erosion sensitive features, and proceed to step two. If there are none the assessment is complete. STEP 2 — Hydraulic Nearness Assessment Sites are hydraulically near a feature if the pollutant load and peak quantity of runoff from the site will not be naturally attenuated before entering the feature. The conditions that render a site hydraulically near to a feature include, but are not limited to, the following: i. The feature or a buffer to protect the feature is within 200 feet downstream of the site. ii. Runoff from the site is tight-lined to the feature or flows to the feature through a channel or ditch. August 1, 2013, Modified January 16, 2015 Appendix 7- Determining Sediment Damage Potential Page 1 of 3 Version Date: October 7, 2019 Previous Version Date: February 20, 2019 A site is not hydraulically near a feature if one of the following takes place to provide attenuation before runoff from the site enters the feature: iv. Sheet flow through a vegetated area with dense ground cover V. Flow through a wetland not included as a sensitive feature vi. Flow through a significant shallow or adverse slope, not in a conveyance channel, between the site and the sensitive feature. Identify any of the sediment/erosion sensitive features from step one that are hydraulically near the site, and proceed to step three. If none of the sediment/erosion sensitive features are hydraulically near the site, the assessment is complete. vii. STEP 3 — Construction Site Sediment Transport Potential Using the worksheet below, determine the total points for each development site. Assign points based on the most critical condition that affects 10% or more of the site. If soil testing has been performed on site, the results should be used to determine the predominant soil type on the site. Otherwise, soil information should be obtained from the county soil survey to determine Hydrologic Soil Group (Table of Engineering Index Properties for step 1.D) and Erosion Potential (Table of Water Features for step 1.E) When using the county soil survey, the dominant soil type may be in question, particularly when the site falls on a boundary between two soil types or when one of two soil types may be present on a site. In this case, the soil type resulting in the most points on the rating system will be assumed unless site soil tests indicate that another soil type dominates the site. Use the point score from Step 3 to determine whether the development site has a high potential for sediment transport off of the site. Total Score Transport Rating <100 Low 100 High A high transport rating indicates a higher risk that the site will generate sediment contaminated runoff. Construction Site Sediment Transport Potential Worksheet A. Existing slope of site (average, weighted by aerial extent): Points 2% or less ...0 >2-5% ..............................................................................................5 >5-10% .......................................................................................... 15 >10-15% ........................................................................................30 >15% .............................................................................................50 B. Site Area to be cleared and/or graded: <5,000 sq. ft ...................................................................................0 5,000 sq. ft. — 1 acre.....................................................................30 >1 acres .......................................................................................50 C. Quantity of cut and/or fill on site: <500 cubic yards............................................................................0 500 — 5,000 cubic yards ................................................................... 5 >5,000 — 10,000 cubic yards.........................................................10 >10,000 —20,000 cubic yards.......................................................25 >20,000 cubic yards .....................................................................40 D. Runoff potential of predominant soils (Natural Resources Conservation Service): Hydrologic soilgroup A....................................................................................0 Hydrologic soil group B.................................................................10 Hydrologic soil group C.................................................................20 Hydrologic soil group D.................................................................40 E. Erosion Potential of predominant soils (Unified Classification System): GW, GP, SW, SPsoils..........................................................................................0 Dual classifications (GW-GM, GP-GM, GW-GC, GP-GC, SW-SM, SW-SC, SP-SM, SP-SC)..........................10 GM, GC, SM, SC soils..................................................................20 ML, CL, MH, CH soils...................................................................40 F. Surface or Groundwater entering site identified and intercepted 1: Yes.................................................................................................0 No ................................................................................................25 G. Depth of cut or height of fill >10 feet: Yes...............................................................................................25 No...........................................................................................................0 H. Clearing and grading will occur in the wet season (October 1 — May 1): Yes 50 No...........................................................................................................0 TOTALPOINTS............................................................................................. >100 1 If no surface or groundwater enters site, give 0 points. APPENDIX 5—Site Plan with all applicable information (Minimum Size 11x17 at a legible scale) - Attached VICINITY MAP- NO SCALE DESIGNED BY: - N LANDSCAPE LEGEND J. STERLING CD N f DRAFTED BY: N M LAWN AREA OR J. BASS EXISTING VEGETATION 1/8" = 1'U.N.O. CONCRETE DRIVE DATE o W 2-23-2022 a MULCH - PLANTING BED x , , EXISTING BEDROCK x , w DECIDUOUS TREE Lz M \ , (D x / r0 3 � / W O O CONIFER TREE I N / ,' o N m J LO a co /// / 70 N:t /r SHRUBS / PLANTINGS N B REQUIRED LANDSCAPING OCN q2 CALCULATIONS N / / SITE AREA 11,010 SQ. FT. / "` L / / ♦ %OF SITE AREA TO BE LANDSCAPED 20%-R2 ZONE C2 Q ! v ,' ,/ ♦ (PER AMC TABLES 19.42.020-.030) 2,202 SQ. FT. REQUIRED 4 / j / �� - • I ,/ ,/ 2,500 SQ. FT. PROVIDED w J 438.5 � "' I O / / � I / COMPLIANCE WITH AMC CH. 16.50 TREE UNIT CREDITS REQUIRED: ELEV. r-- --- -- ------ �F 43a' I - 01 / / TREE PRESERVATION - 12 TREE UNITS REQUIRED (SITE AREA/1,000 SF) O TREE UNIT CREDITS RETAINED: �? 0 TREES 6"DBH =X TREE UNIT c: CREDITS RETAINED O TREE UNIT CREDITS PROVIDED: C U / , I Fre \ 6 NEW DECIDUOUS TREES N I�/ `I I ,/ /f , I 1 1 �C� / \ r O /' (MIN.2"CALIPER @ 6"ABOVE GROUND) M r r� 6 NEW EVERGREEN TREES � RETAINING WALLS TO BE ENGINEERED O ELEV. POTENTIAL RETAINING ^ (8'MIN. IN HEIGHT) Q �WALLS 8,+/- 0 > 435' / ELEV 431. A /'/ / / ILL w U) C2 / / / Z � W W M -0 2s.6js �� /� ,� LOT INFORMATION — g > COPE r ,\ . / Q Q m PARCEL# P133951 o z ° N s0.so c2 ' �/ "' � r (� s�Op I I I I 1 1 I I CATCH SD ` . , , J J T- Q p o m m CV Q d M Q J F -n �i --��, TIGHTLINE DRIVEWAY SLOPED TO CATCH BASIN a ° ° °\�` r'�"s�rF LOT SIZE : 11,010 SQ.FT. D Q o z = (5 w �-- N I ° AND THEN TIES INTO INTO SD TIGHTLINE ° 4 ° / I r a 13 CLEARING LIMIT AREA: 11,010 SQ. FT. O W r I 1 \ I I I - ° / a ' C2 r �, r�' 1 ,� 1 r \ 1 I I r - DRIVEWAY CATCH BASIN O \ 1 I I I ` ° ° /' MAX BUILDING COVERAGE (35%): 3,854 SQ.FT. r I O ' ' 1 ° TO TIE INTO SD TIGHTLINE ° / , � r 1 I � I v., I i a � ° / r La1.I \ 'I 511Buj PgR�"109 SF Q / ° ACTUAL BUILDING COVERAGE 25.2% : 2,775 SQ.FT. `\ .. Z7II � P I °I ° ° 3 I f I I I ELEV. DRIVEWAY a ° ° /p NON-POLLUTION GEN. HARD SURFACE AREA: 3,628 SQ.FT.15S z Q / I I 440' W10SFEP ° ° ° SINGLE 111 I 1,638 SQ. FT. ° ° a '1 ° ° ° ° ° o POLLUTION GEN. HARD SURFACE AREA: 1,638 SQ. FT. O Lu N 1 1 I I \ ° POTENTI N FAMILY ° ° ° WALLS RETAINING /P ° C2 I\�� TOTAL IMPERVIOUS AREA: 5,266 SQ.FT. z / z a r ` RESIDENCE 1 1 - -- ° a ° ° ° ' /LLS4'+�° , ° a ° OVERALL BUILDING HEIGHT: 2 - 2 1/2" 11 Q --- 1 °° ° i d` ° ° , ° ate\ O U G G 6' **GEOHAZARD SETBACK** �i ° '°° 1 Z W I I I r--r-� I ° ° I I \� ° MINIMUM REQUIREMENT #2 BMP'S W W CD ° ° ° ° i I F l li a J ' r Q vJ ELEV. , ° ° a ° mQ Iyr A BMP T5.13: POST-CONSTRUCTION 0 — W a ° / ° o ELEv. �� �� �� C2 SOIL QUALITY AND DEPTH ° ° Oar / ,l�j I --- r , I I ELEV. I I I I ELEV. I 434.2 I � I I I 1 ° ° ° aaa• III 1 , i� I / I I -1 I ,I 1 IL- -4-�--�a °-- --�' I° °� ; �° c2 , ' ^ C2 BMP C233: SILT FENCE -3 Q ^ ' ' ' ° ' o �. ` V C BMP C105: STABILIZED CONSTRUCTION�_____--___20�_0"_— _�. � ; —�_--� o_ J � I \ I � I ° GARAGE ;' a I � , � ;' ; O Q (B� C2_j ENTRANCE / EXIT C2 --- �- FF=449' ° ,2 L M a r-; o N 3. \ I I ELEV. 1 0,0"- p LL `\ HT. RESTRICTION @ 468' 1 D STORM DRAIN INLET PROTECTION I C2 I >k wow \ I I 1 451' a °4 1 �, 1 , C2 1-40.20-00 N r_� i I �� BUILDING '° ' 30% �l P I FOOTPRINT = 2 775 SF °1 °l '� ' ' /S4°pFm'P C2 BMP C235: WATTLES ° I I 1 11 1 ZLLzu z> LOT SIZE = 11,010 SF woo, f i N �\ I i\ � it (25.2% LOT COV.) -�-�� - a-=J,/ ?/� I' ^ , WATER CONNECTION F BMP C123: PLASTIC COVERING 0'� Z 57) 1 �__ __ Ji q ZONE R2 MAX COV. = 35% ----- -- _ I i, - ' VERIFY LOCATION C2 / SOIL STOCKPILE w�Z� SLOPE \ L---- _ \ ' 448.5' i w / moo= 0 ELEV. / z o s ' 45.5 � ELEv. ELEV. J w I I I \ ELEV. \ I I V 450' G ---------- __ - a-- ------��--- --- 1 431.5' 432.6' 1 ILl'�s/-/-- ------ �7 fJi I / I�55 ! I C2 N�'O \` - - - - _- - _- -_ 1 ' __`"� "z L G BMP C154: CONCRETE WASHOUT AREA �N� m 5' SIDE SETBACK=�- ' ' B C2 z zawWa I I C2 - - a =s1F�� � - - - - - r = _��— ---59= - - - _ - - - ---�- -- _ r - _r_ _ ,w �- (',2 -- �- SD CONNECTION ------- 12. 01 ' - - - ELEV. E i`-- w _ f /- - _ �- HIV: I --- VERIFY LOCATION 441.5' o - - - - oxxza 1 � - -59.3%SLOPES° /_ s.,F�� - f -I °° —- — ,s. 1 q 3 w U N z- o=>Wz _ =~o-oo o —t-- L' ' BMP C130: SURFACE ROUGHENING Zoo S88 421481E Ln ' PROPOSED CONCRETE WASHOUT AREA C2 w azz � LO O Z�Q=LL aao'0o d- O d' I OR MAY USE SHARED CONCRETE WASHOUT zozwo CODE & PROJECT DESCRIPTION W z6 M LOCATED OFFSITE IN ROCK RIDGE DEVELOPMENT �ozm ZONING: R2 V I ZZOQZ I OCCUPANCY GROUP AND USE: SINGLE FAMILY RESIDENCE z° a= I ' CONSTRUCTION TYPE: TYPE-V I ' 000w. 1 Nd�zzz ORDINANCES AND HEALL CONSTRUCTION O COMPLY FOLLOWING:ITH LOCAL CODES AND Z w Z ° min~ao 000x -2018 INTERNATIONAL RESIDENTIAL CODE ;Z 12o 0 -2018 UNIFORM PLUMBING CODE gma -2018 WASHINGTON STATE ENERGY CODE z z o PLAN AREAS �z OWNER / DESIGN INFORMATION MAIN FLOOR 2,017 SQ.FT. DESIGNER INFO OWNER APPROVAL BASEMENT 964 SQ.FT. DESIGNER: JASON STERLING-STRANDBERG CONSTRUCTION INC. EMAIL: JASONS@STRANDBERGCONSTRUCTION.COM INITIAL: TOTAL LIVING AREA: 2,981 SQ.FT. DRAFTSMAN: JESSE BASS-STRANDBERG CONSTRUCTION INC. PAGE #: EMAIL: JASONS@STRANDBERGCONSTRUCTION.COM GARAGE 843 SQ.FT. BUILDER INFO c 1 NAME: STRANDBERG CONSTRUCTION, INC. ENTRY 11 O SQ.FT. ADDRESS: 2018 RAVE.,ANACORTES WA98221 TELEPHONE: 360-293-7431 PAGE: COVERED DECK 381 SQ.FT. OWNER INFO NAME: JEFF& LORI ZUMWALT 2 of 19 OPEN DECK 232 SQ.FT. ADDRESS&TELEPHONE AVAILABLE UPON REQUEST APPENDIX 6 — Documented Site Photos (Show all directions of the site, including frontage) 1 Ms- -PPP f/ .h 1 J I Location: Aerial Shot Description of the photo: Looking down on lot Photo taken by: Skagit iMap 1 Y L 5 7 x Location: East side of lot, near sidewalk and street Description of the photo: Looking N-NW from Rock Ridge Parkway, shows neighboring home Photo taken by: Jesse Bass Location: East side of lot, near sidewalk and street in the south east prop corner Description of the photo: Looking W from Rock Ridge Parkway, shows neighboring home, geohazard fence Photo taken by: Jesse Bass 1 Location: Satellite photo looking Northwest Description of the photo: Aerial image showing neighboring homes and houses below the outcrop Photo taken by: Google Earth