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HomeMy WebLinkAboutBLD2009-00354 • • CERTIFICATE OF OCCUPANCY Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, WA 98368 (360)379-4450 FAX (360)379-4451 (800) 831-2678 Al Scalf, Building Official PERMIT #: BLD09-00354 SITE ADDRESS: 432 SUNSET BLVD Issue Date: 02/8/2010 PORT TOWNSEND, 98368 Final Date: 5/8/2012 APPLICANT: JOEL C JANETSKI PHONE: 801-319-1256 JOYCE A JANETSKI 276 N 2520 W PROVO UT 84601-2236 SUBDIVISION: CAPE GEORGE COLONY DIV 2 Block: 3 Lot: 19 PARCEL NUMBER: 938100318 Section: 13 Township: 30 N Range: 02 W PROJECT DESCRIPTION: NSFR W/ATT GARAGE & U/G 500 GAL PROP TANK and stormwater tightline to beach (above OHWM) and shoreline exemption (SDP09-00079) THE PROJECT LISTED ABOVE COMPLIES WITH THE REQUIREMENT OF THE BUILDING CODE 2006 EDITION. OCCUPANCY GROUP: R-3 TYPE OF CONSTRUCTION: 5N SPRINKLER SYSTEM yes no THE PROJECT PASSED ITS FINAL INSPECTION AND RECEIVED FINAL SIGN OFF ON5/8/2012 I:\F_BLD_Occupa ncy.rpt 10/29/19 UILDING PERMIT APPLIC )N MLA09-00347 Review Type: I Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, WA 98368 PERMIT #: BLD09-00354 Received Date: 10/14/2009 SITE ADDRESS: 432 SUNSET BLVD PORT TOWNSEND, 98368 (Y I2 OWNER: JOEL C JANETSKI PHONE: 801-319 - JOYCE A JANETSKI 276 N 2520 W PROVO UT 846012236 CAPE GEORGE COLONY DIV 2 SUBDIVISION: Block: 3 Lot: 19 PARCEL NUMBER: 938100318 Section: 13 Township: 30 N Range: 02 W CONTRACTOR: TbLLZFSON BUILDERS. PHONE: (360+73r2=-4O8O' PoBoo i C,(z an<..Tb� C t,�l silzu—io x) I _23cia CHIMA WA 98325 ractor's Licens/TOLLE 9 Expires 3/16/2011 REPRESENTATIVE: TOLL SON:EtU:ILDERS INC PHONE•k' J..32.-4080 TOD1),I4t1LBERT BO'1OX 100 PROJECT DESCRIPTION NSFR W/ ATT GARAGE & U/G 500 GAL PROP TANK TYPE OF WORK RES SQUARE FOOTAGE: TYPE OF IMP NEW MAIN: 1,342 VALUATION 385,000.00 ADD'L: HEAT TYPE: RAD CODE EDITION: 2006 HEAT BASE: 1,967 HEAT TYPE: PRO OCCUPANCY: R-3 UNHEATED: #OF STORIES: OCCUPANCY: OTHER: CONST TYPE: 5N SHORELINE: CONST TYPE: GARAGE: 441 SETBACK: DECK: 231 7 BANK HEIGHT: SEWAGE DISPOSAL: ALT WATER SYSTEM: CAPE GEO BEDROOMS: BATHROOMS: Exist: 0 Exist: 0 Prop: 2 Prop: 3 Total: 2 Tgtal 3 Routing Date: --�` 'n-(_ yr)q Type Amount Paid By: Date: Receipt: Approved/Date Permit $2,589.75 LYK 10/14/09 111093 APPROVEP Plan Check $1,683.34 LYK 10/14/09 111093 State Building Code $4.50 LYK 10/14/09 111093 Potable Water Application $62.00 LYK 10/14/09 111093 FEB 3 IUIC Total: $4,339.59 Jefferson County Planning & Building Department Jefferson County Building Divan Permit NumbSBLD09-00354 • Applicant: JANETSKI BUILDING PERMIT INSPECTION APPROVALS applicable Code: 2006 International Building Codes To schedule inspections, call (360)379-4455 no later than 7:00 AM the day of the inspection. Requests received after 7:00 AM will not be scheduled for that day's inspections. ELECTRICAL PERMITS are issued by the Washington State Department of Labor& Industries. The electrical permit must be signed off by the State Inspector prior to the County's Framing Inspection Inspection Item Date Approval Signature Notes S � Setbacks 9, . inimum setback from Suielk_ 1et Boulevard right-of-way shall be 20 feet. / "' MVlinimum side yard setbacks shall be 5 feet. Minimum setback from top of shoreline bank is identified as 78 feet. Erosion Control /. j- ! / 1" SEE CONDITIONS 3 &4 Foundation Footing f '" '" t P61 '� i1�t,- c (6 11- fa Sec. ..�� y <<Z Footing Drains 10_02 7 /l l Foundation Stem Wall %c' -S`_ ( / j' Underground Plumbing . L Under Floor Framing it, 2 l?4) Straps(hold downs) //, (a l l (67-75 Ext. Shear Wall Nailing //, �v,�� (5-3 Rough-in Plumbing / /2/27//1 - Framing /42."2//( ;2- Blocking Airseal Insulation:Walls / • (( Orr) Insulation: Floors ft,_I?_1( ;( , Insulation: Ceiling f L Int. Shear Wall Nailing Wallboard Nailing t -r I r) Gas Line: Interior Propane Tank 5---� l 2_ Heat/Chimney Clearance Drywell/Alt Drainage 5-_p"1 Z /473 SEE CONDITION 4 FOR STORMWATER CERTIFICATION Address Posted g- jZ fir/3 S FINAL INSPECTION = /2_ /7 FINAL INSPECTION MUST BE APPROVED PRIOR TO BUILDING BEING OCCUPIED THIS PERMIT IS VALID FOR ONE YEAR • • CONDITIONS for Building Permit# :BLD09-00354 1.) PRIOR TO FINAL BUILDING OCCUPANCY, PROPONENT SHALL SUBMIT A WRITTEN LETTER FROM QUADRA ENGINEERING STATING THAT THE STORMWATER FACILITY HAS BEEN CONSTRUCTED IN ACCORDANCE WITH THE REQUIREMENTS OF THE "GEOTECHNICAL & STORMWATER MANAGEMENT REPORT" DATED APRIL 7, 2009 AS SIGNED BY HAROLD ANDERSON OF QUADRA ENGINEERING. 2.) A 6 inch tightline is proposed to dispose of the stormwater from the single family residence. The tightline will be located parallel to the southern property line and the outfall will disperse above the Ordinary High Water Mark. 3.) A SILT FENCE SHALL BE INSTALLED AS IDENTIFIED ON THE SUBMITTED SITE PLAN PRIOR TO ANY LAND DISTURBING ACTIVITY. THE MINIMUM HEIGHT OF THE TOP OF SILT FENCE SHALL BE 2 FEET AND THE MAXIMUM HEIGHT SHALL BE 2 1/2 FEET ABOVE THE ORIGINAL GROUND SURFACE. THE SILT FENCE SHALL BE BURIED IN A TRENCH TO A MINIMUM DEPTH OF 5 INCHES BELOW THE GROUND SURFACE. THE TRENCH SHALL BE BACKFILLED AND THE SOIL TAMPED IN PLACE OVER THE BURIED PORTION OF THE SILT FENCE, SUCH THAT NO FLOW CAN PASS BENEATH THE FENCE AND SCOURING CAN NOT OCCUR. ANY DAMAGE TO THE SILT FENCE SHALL BE REPAIRED IMMEDIATELY. SEDIMENT DEPOSITS SHALL EITHER BE REMOVED WHEN THE DEPOSIT REACHES APPROXIMATELY ONE-THIRD THE HEIGHT OF THE SILT FENCE, OR A SECOND SILT FENCE SHALL BE INSTALLED. 4.) CONSTRUCTION ENTRANCES SHALL BE STABILIZED WHEREVER TRAFFIC WILL BE LEAVING A CONSTRUCTION SITE AND TRAVELING ON PAVED ROADS OR OTHER PAVED AREAS WITHIN 1,000 FEET OF THE SITE. THE ENTRANCE SHALL BE CONSTRUCTED ON A FIRM COMPACTED SUBGRADE. QUARRY SPALLS (OR HOG FUEL) SHALL BE ADDED IF THE PAD IS NO LONGER IN ACCORDANCE WITH THE SPECIFICATIONS. (BMP C105, 2005 DOE STORMWATER MANUAL). ANY SEDIMENT THAT IS TRACKED ONTO PAVEMENT SHALL BE REMOVED BY SHOVELING OR STREET SWEEPING. THE SEDIMENT COLLECTED BY SWEEPING SHALL BE REMOVED OR STABILIZED ON STIE. ANY QUARRY SPALLS THAT ARE LOOSENED FROM THE PAD, WHICH END UP ON THE ROADWAY SHALL BE REMOVED IMMEDIATELY. UPON PROJECT COMPLETION AND SITE STABILIZATION, ALL CONSTRUCTION ACCESSES INTENDED AS PERMANENT ACCESS FOR MAINTENANCE SHALL BE PERMANENTLY STABILIZED. 5.) A Geotechnical & Stormwater Management Report dated April 7, 2009 prepared by Quadra Engineering was submitted in conjunction with this application. The report addressed the stability of the geologic hazard area. 6.) An Engineered Storwmater Plan •been submitted and approved by the Depilent of Community Development. Once the subject permit has been issued the applicant shall fully implement the provisions of the submitted plan and contact the Jefferson County Department of Community Development to arrange a schedule to inspect the property for plan compliance. A Certificate of Occupancy will not be issued until the Department verifies plan compliance. No clearing for roadways or utilities shall occur on the project site until clearing necessary for the installation of temporary sedimentation and erosion control measures have been completed. 7.) Outdoor residential storage shall be maintained in an orderly manner and shall create no fire, safety, health or sanitary hazard. 8.) Not more than 2 unlicensed vehicles shall be stored on any lot unless totally screened from view of neighboring dwellings and rights-of-way. Such screening shall meet all applicable performance and development standards specific to the district in which the storage is kept, and shall be in keeping with the character of the area. Screening shall meet the requirements of Chapter 18.30 JCC. Outdoor storage of 3 or more junk motor vehicles is prohibited except in those districts where specified as an automobile wrecking yard or junk (or salvage) yard and allowed as a permitted use in Table 3-1 or Chapter 18.18 JCC, and such storage shall meet the requirements of JCC 18.20.100, Automobile wrecking yards and junk (or salvage)yards. In no case, shall any such junk motor vehicles be stored in a critical area. 9.) A minimum of two (2) on-site parking spaces shall be provided for the single family residence. 10.) Maximum lot coverage is not to exceed 25%. Lot coverage is defined as amount of impervious surface which includes roof tops, driveways, concrete, etc. Pre-existing legal lots of record less than one acre in size in rural residential districts are subject to the stormwater requirements in Chapter 18.30 JCC and must meet the"Area of Impervious Surface Coverage" to the maximum extent practicable as determined by the administrator. 11.) The building height is not to exceed 35 feet. 12.) Minimum setback from Sunset Boulevard right-of-way shall be 20 feet. Minimum side yard setbacks shall be 5 feet. Minimum setback from top of shoreline bank shall be 30 feet(site plan identifies a setback of 78 feet) measured as follows: 8/31/11: NOTE: A revised site plan was submitted that moved the structure landward to an approximate 86 feet from the top of the bank. The standard setback for residential structures, including common appurtenant structures such as garages and workshops, shall be thirty (30) feet or one (1) foot for each foot of bank height, whichever is greater. This setback shall be measured from the bank's edge when the bank's height exceeds 10 feet. When the bank's height is less than 10 feet, the setback shall be measured from the ordinary high water mark. The setback shall not exceed 100 feet. 13.) Exterior lighting for residential uses shall not exceed twenty feet(20') in height from the finished grade, excepting when such lighting is an integral part of a building or structure. Ground level lighting is encouraged. 14.) Lighting fixtures shall be designed and hooded to prevent the light source from being directly visible from outside the boundaries of the property. The intensity or brightness of all lighting, during construction and after project completion shall not adversely affect the use of surrounding properties or adjoining rights-of-way. 15.) Residential developers and individual builders shall be required to preserve shoreline vegetation and reduce the associated risk of erosion during construction and any future activity which may impact the stability of the shoreline. • 4jrniii-°14 �c JEFFERSON UNTY ' DEPARTMENT OF COMMUNITY DEVELOPMENT ` '4 621 Sheridan Street • Port Townsend •Washington 98368 360/379-4450 • 360/379-4451 Fax �p� www.co.jefferson.wa.us/commdevelopment biING Master Permit Application MLA: ng'" -71 Project Description(include separate sheets as necessary): s,`r- f.e -;J t�r c-.) / 4-rt-et c�,-es-e [I.s,�,43� _ Tax Parcel Number: G�S l ' U Property Size: 0, c-I t �C 1 707(acres/square feet) Site Address and/or Directions to Property: 5a 5LA rib LA FDL_v D Property Owner(s)of Record: Telephone: 4$C91, 'i2. Z. C9 l t ( Fax: email: Mailing Address: Applicant/Agent(if different from owner): 1,(f.c-so,..., (i,ti t j R,r,S 1m.cia �� tto --_ Telephone:'11e c,- Mg 6' _2-2,7'-I Fax: 3614%. 73) '-/o'V email:j t3c.l 4 *d L i pc roll Mailing Address: Po \Oi Loo LL,'wn41.uw► t,s,i.4- Zc--- (3a'tcQtr-s, c.,avv. What kind of Permit?(Check each box that applies 0 Lot or Road Segregation ,affuilding 0 Critical Areas Stewardship Plan 0 Demolition Permit 0 Variance(Minor, Major or Reasonable Economic Use) .2'Single Family Garage ached/betached 0 Conditional Use[C(a), C(d),or C]** ❑ Manufactured Home 0 Modular - . ❑ Discretionary"D"or Unnamed Use Classification ❑ Commercial* 0 Special Use(Essential Public Facilities)** ❑ Change of Use 0 Boundary Line Adjustment ❑ Address 0 Road Approach 0 Short Plat** ❑ Home Business ❑ Cottage Industry 0 Binding Site Plan** --Propane 0 Long Plat** 0 Sign 0 Planned Rural Residential Development(PRRD)/Amendments** 0 Allowed"Yes"Use Consistency Analysis 0 Plat Vacation/Alteration** kr-Stormwater Management 0 Shoreline Master Program Exemption/Permit Revisions** ❑Site Plan Approval Advance Determination(SPAAD)* 0 Shoreline Management Substantial Development** ❑Temporary Use 0 Shoreline Management Variance ❑Wireless Telecommunication* 0 Comprehensive Plan/UDC/Land Use District Map Amendment ❑ Forest Practices Ad/Release of Six-Year Moratorium 0 Jefferson County Shoreline Master Program Amendment *May require a Pre-Application Conference 0 Tree Vegetation Request **Requires a Pre-Application Conference Please identify any other local,state or federal permits required for this proposal, if known: DESIGNATION OF AGENT I hereby designate 1 ex.lc4 H 1be.✓'T- to act as my agent in matters relating to this application for permit(s). OWNER SIGNATURE (4 1 Date: Z 2 77 � By signing this applica' orm,the owner/age attests that the information provided herein,and in any attachm ,is true and correct to the best of his,her or its knowle . Any material falsehood or any omission of a material fact made by the owner/agent with respect to this application packet may result in this permit being null and void. I further agree to save,indemnify and hold harmless Jefferson County against all liabilities,judgments,court costs, reasonable attorney's fees and expenses which may in any way accrue against Jefferson County as a result of or in consequence of the granting of this permit. I further agree to provide access and right of entry to Jefferson County and its employees,representatives or agents for the sole purpose of application review and any required later i ' ns. Staff's a s and right of entry will be assumed unless the applicant informs he County in writing at the time of the applicatio e e wants,pri otice / Signature: _t Date: PP 1 ' rmdertake as a resu of the issuance of this permit may negatively impact upon one n ore threatened or endangered species and could lead to a pofe -. - of an endangered species as those terms are defined in the federal law known as the "Endangered Species Act"or"ESA.'Jefferson County makes no assurances to the applicant that the actions that will be undertaken because this permit has been issued will not viola the ESA. Any individual,group or agency can file a lawsuit on behalf of an endangered species regarding your action(s)even if you are in comp' ce with the Je rson County development code.The Applicant acknowledges that he,sh or it holds individual and non-transf a respo ' ility for a • to a comp) • with the ESA. The Applicant has read this djsclaimer and gns an dates it below. 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This Report and the Site Plan are mutually inclusive of each other and shall be copied as a single document. Existing Conditions The Parcel: • Is 0.41 acres zoned rural residential 1 unit/ 5 acres (RR 1:5), • Has the following building setbacks as established by the Cape George CC&Rs: - 25 feet from the Right-of-Way - 5 feet side yard setback - 5 feet rear yard setback • Is bound on the: - North by a developed single-family residential parcel - South by an undeveloped single-family residential parcel - East by the Sunset Boulevard Right-of-Way - West by Discovery Bay • Has slopes ranging approximately from 10% - 16% on the grass and weed covered upper developable area, 2:1 though a strip of native understory vegetation and a solitary mature tree, and a vertical marine bluff • Stormwater runoff flows via sheet flow directly to Discovery Bay • Has an on-site sewage system and potable water available from the Colony's community water system • Critical Areas - Discovery Bay - a 30-foot Shoreline Master Program setback from the top of bluff is required. - Critical Aquifer Recharge Area. All development must comply with section 18.22.130 of the Jefferson County Code OCT 1 4 200R E:\_Jobs\08\0835 Joel Janetski\SWM\0835_SWM&Geotech_Report(1f).doc Page 1 of 8 • • i Quadra Engineering 240 W. Cedar St. P.O. Box 2356 Sequim, WA. 98382 (360) 683-7019 The USDA Natural Resources Conservation Service Soil Resource Report indicates Swantown gravelly sandy loam (StB) is the dominant soil for this site. Swantown soils have the following characteristics: - hydrologic soil group "D" - somewhat poorly drained with low water capacity - permeability of 2.0 to 6.0 in/hr to the depth 20" to 30" and 0.0 to 0.06 in/hr below that due to a restrictive horizon of firmly cemented very gravelly sandy loam - high seasonal water table November to March - low shrink-swell potential Geotechnical Observations, Conclusions and Recommendations • Marine Bluff (refer to exhibits that follow) The parcel owner provided knowledge of a resent isolated failure of the toe of the bluff and noted not seeing other failures during ownership of the parcel. The bluff was observed on three different occasions 18 June, 5 August, and 18 November 2008. The first two visits were during the dry season and the bluff face was dry except in areas subject to weeps. The last visit was during the wet season and followed a cycle of fall storms. The bluff is located along the northern reach of the east shoreline of Discovery Bay in a well established and developed subdivision. This location is unprotected and exposes the bluff to direct wind and rain from the west. Coastal aerial photographs of the area revealed no significant changes of the shoreline. The coastal bluff has a near vertical face that is 18 to 20-feet high. The top of the bluff has immature trees and a very dense growth of understory native grasses and shrubs. The toe was found to have vegetated organic mats that had sloughed off from the top and what appeared to be permanent vegetation where supporting organic soil was present. The ordinary high water mark is approximately 8 to 10-feet horizontally from the toe of the bluff. The soils visible at the face of the bluff (approximately 300 linear feet) could be described as a soils complex given the intermingling of soil with various properties. - The soil in the face of the bluff, below a 20 to 28-inch primary root zone, is composed of deposits of strongly to moderately cemented sandy loam, strongly cemented gravelly silty sand which include intermingled horizons with cobbles, and slightly cohesive silty sand. The boundary of each is generally well defined horizontally through narrow transition horizons and immediate change vertically. - The reported failure is a domed pocket approximately 8-feet wide x 4-feet high x 3-feet deep of slightly cohesive silty sand at the toe of the bluff that had slumped into a pile. Soil surfaces exposed inside the pocket included additional cohesive silty sand that fell in small amounts when poked with a stick, and strongly cemented gravelly silty sand with cobbles which would not fail when poked hard with a screwdriver. CC; i 4 E:\_Jobs\08\0835 Joel Janetski\SWM\0835_SWM&Geotech_Report(1f).doc Page 2 of 8 • • Quadra Engineering 240 W. Cedar St. P.O. Box 2356 Sequim, WA. 98382 (360) 683-7019 - Contiguous to the pocket face are strongly cemented gravelly silty sand with cobbled horizons above the pocket; to the south there is a sloughed area of the understory that is approximately 6-ft long x 3-ft wide. It appears that the cemented face continues south. On the north is a blocky moderately cemented sandy loam that is damp due to weeps. This northern transition is both abrupt and near vertical with the face sloughing in small damp blocks that are easily broken. This continues north to what could be heard as a free-flowing stormwater (assumed) outfall approximately 100-ft north that is well hidden under a understory overhang. A notable observation of the last visit to the site was that a minor, but additional slough of approximately 1/4-cubic yards had occurred at the top of the pocket. The surface of this minor pocket was damp. • Geotechnical Conclusion This site is located within an area that has been developed for a significant period of time and there is no indication that additional development will be detrimental to the buff. It is apparent that ground water affects the buff and it is assumed that excessive groundwater could be detrimental. Given this, it is recommended that storm water increases be mitigated by practical methods. • Recommendations - Implement temporary erosion control measures during construction. - Restrict recreational and casual use of buffer above the bluff. - Protect, preserve, & enhance vegetation in the buffer. - Selectively trimming (to include topping) trees to enhance the property's view is acceptable provided that the trees are not imperiled. A knowledgeable person should be consulted on appropriate trimming practices. - Prevent concentrated flows. Collect and convey via a closed conduit stormwater from the roof and driveway along with foundation drainage to the toe of the bluff; discharge drainage using an energy dissipation device at the outlet. - Owner shall inspect, maintain and repair all drainage facilities regularly, but no less than is required to maintain integrity; also see Maintenance below. - Maintain on-site sewage system(s) on the upslope portion of the parcel. The installation of low-flow plumbing devices is recommended. - Utilize least invasive methods when working in the buffer i.e. hand tools to minimize soil compaction. - Restore all disturbed areas within the buffer with similar vegetation. 0C1 1 4 E:\_Jobs\08\0835 Joel Janetski\SWM\0835_SWM&Geotech_Report(1f).doc Page 3 of 8 • • Quadra Engineering 240 W. Cedar St. P.O. Box 2356 Sequim, WA. 98382 (360) 683-7019 Design The proposed site improvements include the construction of a single-family residence with up to 4,800 square feet of impervious surfacing that includes the residence, patios & walks, and driveway & parking area. The stormwater management basis of design for this site will be to collect runoff and discharge it above the ordinary high water line of Discovery Bay/ open-water in a manner compliant with the "Stormwater Management Manual for Western Washington". • Quality - Roof runoff shall be collected in roof gutters and conveyed via downspouts, roof leaders, and an over-slope drain to the toe of the bluff - Parking area runoff shall be directed to a bio-swale for treatment then to a catch basin with a tee insert and absorbent pad to capture larger suspended materials and oil based contaminants - A diffuser will be installed at the outfall of the storm drain to reduce the potential of erosion at the outfall - The owner shall clean the catch basin and replace absorbent pads prior to each rainy season and after any accidental discharge; and properly dispose of accumulated materials and pads at an approved facility • Quantity - This property drains directly to open-water. • Maintenance - Immediately following any accidental contaminant discharge the catch basin shall be cleaned. Acceptable cleaning methods include pumping/vacuuming/hands; flushing/rinsing resulting with a contaminated discharge at the storm drain outfall is NOT PERMITTED. - Annually, prior to the onset of the wet season, the owner shall have all the stormwater facilities inspected to verify integrity, perform repairs and complete maintenance. This will include: o Replacing absorbent pad in catch basin as recommended by manufacturer. o Removal of debris and other material from the catch basin o Inspection of all visible components. Components which appear stressed or subject to imminent failure shall be replaced o Inspection of bio-swale to verify it has not been compromised by pollutants, excess silt/ clay/ sand - Inspect outfall and diffuser, clean and repair as necessary - All materials removed as a result of maintenance shall be disposed of in a lawful manner. E:\_Jobs\08\0835 Joel Janetski\SWM\0835_SWM&Geotech_Report(1f).doc Page 4 of 8 • • Quadra Engineering 240 W. Cedar St. P.O. Box 2356 Sequim, WA. 98382 (360)683-7019 • Erosion Control: The permitee shall be responsible for implementing and maintaining erosion and sediment control BMPs during construction and until final stabilization of disturbed areas is achieved to prevent the conveyance of soil, silt and dust from the property. The following minimum standards shall be used as required by seasonal and site conditions. - A stabilized construction entrance or approved equivalent shall be used to prevent the transportation of material on to adjoining pavements. - Abate dust: The construction site shall be sprinkled with water as required - Ground cover shall be established on all disturbed surfaces as follows: • Intermediate / emergency cover on slopes flatter than 5% may be straw or plastic covering, plastic covering shall be required for slopes steeper than 5% • Temporary seeding shall be annual rye or other approved "fast germinating" ground cover • Permanent seeding shall be with Kentucky Blue Grass, Tall Fescue, Perennial Rye, or Chewing fescue. The application rate shall be 120 pounds of seed per acre. • Work shall comply with Chapter II — 5.4.3 of the Puget Sound Stormwater Management Manual - Temporary silt barriers or silt fencing shall be installed to intercept eroded material and prevent it from exiting the parcel. This shall be implemented prior to imminent rainfall and is highly recommended during the wet season - Grading activities shall be avoided prior to and during heavy rainfall. - Clean all accumulated soil, silt, dust and debris from the inside of all stormwater management facilities and conveyances following final stabilization. Conclusion A 40-liner foot bio-swale is required to provide filtration of runoff from the driveway and parking pad resulting from a storm event. Runoff shall be routed through the swale prior to outfall to the catch basin shown in the Site Plan. The outfall from the catch basin will be a diffuser assembly, placed at the toe of the existing bluff, to provide protection against down slope erosion. Calculations Calculations are performed using the Western Washington Hydrology Model Version 3 0 by Washington State Department of Ecology, Aqua Terra Consultants, & Clear Creek Solutions screen shots of the model are provided on the following page. OCT 1 4 'LC'J E:\_Jobs\08\0835 Joel Janetski\SWM\0835_SWM&Geotech_Report(1f).doc Page 5 of 8 • • Quadra Engineering 240 W. Cedar St. P.O. Box 2356 Sequim, WA. 98382 (360) 683-7019 Water Quality Calculations: �_WWHM3 0835(c) ._ LEI ....1 L [re u0 ID ehnmetic Ix earl AI n 1 MltlgaCeJ __ SCENARIOS Subbesin NamelBarn 1 -, I neiglIMIMINSMili r Pteaevekpea — Surface tnterllere Groundwater Flows To: ISena Fir 1 I ISardFlr 1 : I I -:-.1I r Miioded MOM i Area in Basin Matannal Par Soeoafo I r f; - Available Pervious Available Im ervious Fl FMFNTS -- UL( SIMINM Mill Pervimaad 10 I Awes Isvn o,.Totd )3.053 I nu. f. Boon Toter I0.053 - la.. e� NEEL d De.eb Zero Salad By.® l . ..t_. ._...-._.._ GO III i�� _ Sand filter 1 Mitigated I Sand Facility Name Sand Fi 1; ll - Outlet 1 fO�—utlet 2 �Outlet 3 Downstream Connections Chanel 1 I I" I 10 -I i 1 Facility Type Sand Fief I 1"'. E Precyiation Copied to Facily Quick Filter I I riffilMENEEMIlli Facility Bottom Elevation(It) ID I r:. Facility Dimensions Outlet Structure r' Bottom Length 7r....... I BopdnWdlh Rind Hdyh48t1 0.5 -!.) 1Move Elansir__ Slope fled Dimrded l 100 Dl Sr* Depth = H I, t Side - Rod Type IFlat ':'I —j� Left Bottom Side Slop -- Notch Type I s .yi Load ayl tI I _. .....J SideLI Top Slopee _s ".'-'13-11-'-'-'Infiltration IVES -H Orifice Diameter Height °Max (_61 Analysis Water OefeMINIMOGM Y IOfftirBBM Hydauk Caductmlyfnnal 0.5 ^I Number On) (Ft) (Cl,) Run .I rrkii Anallsls ( 24hot,Volum 1 .11 Fat:mdend*WO -H: 2 Io—'.-If-:_I 0 More tent Told Vdme Fiudedlaaa-Iq 2945 3 r--'-I���{ 0 Standard Flow Rate Ids)ITEI Stdddd Sow Rde(ch)liani Tdd Volume Through Rxe{aaa-Itl 0.073 --. 15 Minute Flow Rate Egan 15 Menke Flow of. TestedVdmelaae-hl 3m8 Flaps StaapeVarna*Row Head .007 Paceri Filled 97.58 Prod maenad0.10 J Show Pond Teble IDpen Table ={ v 10/3/2008 9:10 AM.:-. The preceding shows a screen capture of the WWHM3 that models the swale as a sand filter for quality control: - Site Schematic (Schematic window) - Tributary basin area=0.053 acres (Basin 1 Mitigated window) - Percentage of the total runoff volume the swale will treat= 97.58% (Sand Filter 1 Mitigated window) - The 15-minute water quality flow rate = 0.0025cfs (Analysis window) lC C r 1 `t OCR E:\_Jobs\08\0835 Joel Janetski\SWM\0835_SWM&Geotech_Report(1f).doc Page 6 of 8 • • Quadra Engineering 240 W. Cedar St. P.O. Box 2356 Sequim, WA. 98382 (360) 683-7019 l i ;• -. \s';•,.�lf ' y+' ; ,. ••c -. •. h t • !t Iff Y l • y 1 uw t 1 ♦ 'R I { 1k { <. • r>.r.5J/ i•. i v / .�� 1 /s.++•�r 7►y m+- '-. l�+ �'► , r C .41 ,. a r� >r r `�; ' t Ili'• , • jt3•'•-. •�{.,i4 t.-= ,7? :. i4!-! 'y. .Y ,%ha `� ,.y�` yr..;''`r �r. fit x' � Sj��t "F�r �� f } ���;�Y°.."�!� ;�*`� v.���al '7"i��dR 4X �'�S`� r �2r y x _ art• _ ,, ,d -z:, i,k� t t s+liiff 7 ¢ a.f. 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