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Home My WebLink AboutBLD2017-00435 - 05 STORMWATERoo DEPARTMENT OF COMMUNITY DEVELO 621 Sheridan Sueet, Port'Iownsend, WA 98368 Tel: 360.379.4450 | Fax 360.379.4451 Web: wrrrv.co.iefferson.u,a.us /communitvdevelopment E-mail: dcd@co.ie fferson.wa.us STORMWATE,R CALCUI-ATION WO DETERMINING STORMWATER MANAGEMENT REQUTREMENTS: This stormwater calculation worksheet should be completed first to classify the proposal as "small," "medium," or "large." The size determines whether a Stormwater Site Plan is required in conjunction with a stand-alone stormwater management permit application, building permit application, or other land use approval application that involves stormwater review. The basic information will also be helpful for completing a Stormwater Site Plan, if required Lond-disturbing octivity is any activity that results in movement of earth, or a change in the existing soil cover (both vegetative and non-vegetative) and/or the existing soil topography. Land disturbing activities include, but are not limited to clearing, grading, filling, excavation, and compaction associated with stabilization of structures and road construction. Nstive vegetation is vegetation comprised on plant species, other than noxious weeds, that are indigenous to the coastal region of the pacific Northwest and which reasonably could have been expected to naturally occur on the site. Examples include species such as Douglas fir, western hemlock, western red cedar, alder, bigJeaf maple, and vine maple; shrubs such as willow, elderberry, salmonberry, and salal; herbaceous plants such as sword fern, foam flower, and fireweed. lmperuious surfoce is a hard surface that either prevents or retards the entry of water into the soil mantle as under natural conditions prior to development. A hard surface area which causes water to run off the surface in greater quantities or at an increased rate of flow from the flow present under natural conditions prior to development. Common impervious surfaces inclu de, but are not limited to roof tops, walkways, patios, driveways, parking lots or storage areas, concrete or asphalt paving, gravel roads, packed earthen materials, and oiled, macadam or other surfaces which similarly impede the natural infiltration of stormwater. eRorrcr/aepucaNT NAME:MLA # PARCEL SIZE (I.E.. SITE) An acre contains 43,560 square feet. Multiply the acreage by this figure o ooo sq/ft Size of parcel _ acres Size of parcel in square feet LAND DISTURBING ACTIVITY. CONVERSION OF NATIVE VEGETATION. AND VOLUME OF CUT/FILL Zoo sq/ft sq/ftDrainfield, septic tank, etc. Lawn, landscaping, etc. Construction site for structures Tota! Land Disturbance Zoo Other compacted surface, etc.tndicate Total Volumes of Proposed: cutOFitl O(culyd) Answer the following two questions related to conversion of native vegetation: Does the project convert lo acres or more of native vegetation to lawn or landscaped areas? Circle: Yes Does the project convert 2Y" acres or more of native vegetation to Pasture? Circle: Yes @ Well, utilities, etc.- sq/ft Driveway, parking, roads, etc. sq/ft Calculate the total area to be cleared, graded, filled, excavated, and/or compacted for proposed development project. lnclude in this calculation the area to be cleared for: sq/ft sq/ft sq/ft stomwater elc worksheet - REV. 1ol2ol2o14 @ 1 STORMWATER CALULATIONS _ IMPERVIOUS SURFACE TorAL NEw+ TorAL ExlslNG* L I 70 sqtft Total New *This amount will be used to check total lot coverage. Zo o sqnt c TotalExisting 26 10 sqfft oo sq/ft sq/ft Other Driveway, parking, roads, etc Other Solid Decks (without infiltration below) NEW Structures (all roof area) Sidewalks Patios EXISTING Structures (all roof area) Sidewalks Patios Solid Decks (without infi ltration below) Driveway, parking, roads, etc o The following questions will help determine whether the proposed project is considered development or redevelopment. FURTHER INSTRUCTIONS: lf the answer is yes, the proposal is considered redevelopment and the attached Figure 2 should be used to determine the applicable Minimum Requirements. lf the answer is no, the proposal is considered new development and the attached Figure 1 should be used. At this juncture, the applicant should refer to the applicable Flow Chart to determine the Minimum Requirements for stormwater management. DCD staff will help verifli the classification of the project and the application requirements. For proponents of "small" projects who must comply only with Minimum Requirement #2-Construction Stormwater Pollution Prevention-an additional submittal is not required. The proponent is responsible for employing the 12 Elements to control erosion and prevent sediment and other pollutants from leaving the site during the construction phase of the project. Pick up the Construction Stormwater Pollution Prevention (SWPP) Best Management Practices (BMPs) Packet. Proponents of "medium" projects-those that must meet only Minimum Requirements #1 through #S-and for "large" projects-those that must meet all 10 Minimum Requirements-are required to submit a Stormwater Site Plan. DCD has prepared a submittal template of a Stormwater Site Plan, principally for rural residential projects. Complete the template in the Stormwater Site Plan lnstructions and Submittal Template or prepare a Stormwater Site Plan using the step-by-step guidance in the Stormwater Manogement Monuol. APPLICANT SIGNATURE o DEVELOPMENT v. REDEVELOPMENT Divide the total existing impervious surface above by the size of the parcel and conve( to a percentage: Does the site have 35% or more of existino impervious surface? Circle: Yes --D-"n By signing the Stormwater Calculation Worksheet, I as the applicant/owner attest that the information provided herein is true and correct to the this application is being made with the full knowledge and consent of all owners of the affected (oare) knowledge. I also I best of my property. 2stomwater calc worksheet - REV. 1213012015 ------2-ge -sqrt sq/ft sq/ft USE ONLY o Volume I - Minimum Technical Requirements -August 2012 2-10 o Start llere Yes Yes Yes Figure 2.4.1 - Flow Ghart for Determining Requirements for New Development Does the site have 35%o or more of existing impervious coverage? See Redevelopment Minimum Requirements and Flow Chart (Figure 3.3)Does the project convert '/c aCreS Or mOre Of vegetation to lawn or landscaped areas, or convert 2.5 acres or more of native vegetation to pasture? Does the project result in 5,000 square feet, or greater, of new plus replaced hard surface area? NoYesYes Does the project result in 2,000 square feet, or greater, of new plus replaced hard surface arca2All Minimum Requirements apply to the new and replaced hard surfaces and converted vegetation areas. Does the project have land disturbing activities of 7,000 square feet or greater? Minimum Requirements #l through#5 applyto the new and replaced hard surfaces and the land disturbed. Minimum Requirement #2 applies. o o Volume I - Minimum Technical Requirements - August 2012 2-t I Does the project result in 2,000 square fee! or more, of new plus replaced hard surface area? OR Does the land disturbing activity total 7,000 square feet or greater? Minimum Requirements #2 applies.Minimum Requirements #l through #5 apply to the new and replaced hard surfaces and the land disturbed. Does the project add 5,000 squEre feet or more ofnew hard surfaces? OR Convert 3A acres or more ofvegetation to lawn or landscaped areas? OR Convert 2.5 acres or more of native vegetation to pasture? Next Question Yes No Is this a road related project? All Minimum Requirements apply to the new hard surfaces and the converted vegetation areas. Does the project add 5,000 square feet or more ofnew hard surfaces? Do new hard surfaces add 50% or more to the existing hard surfaces within tle project limits? Yes Yes Is the total ofnew plus replaced hard surfaces 5,000 square feet or more, AND does the value of the proposed improvements - including interior improvements - exceed 50% of the assessed value (or replacement value) ofthe existing site improvements? No additional requirements No additional requirements No Yes All Minimum Requirements apply to the new and replaced hard surfaces and converted vegetation areas. Yes No Next Questtion Yes No No Figure 2.4.2- Flow Chart for Determining Requirements for Redevelopment O o DEPARTMENT OF COMMUNITY DBVELOPMBNT 621 Sheridan Street, Port Townsend, WA 98368 Tel: 360.37 9.4450 | Fax: 360.319.4451 Web: www.co j efferson.wa.us/communitydevelopment E-rnai I : dcd@co j efferson.wa.us STORMWATER OPTIONS & GUIDANCE What is Stormwater? Stormwater is rainwater that runs off hard surfaces like roofs and driveways and needs to be infiltrated into the soil on-siter before it causes flooding and erosion, which can lead to polluted water and potential landslides. Erosion can weaken bluffs and slopes, and damage fish habitat like streams, rivers and Puget Sound. How do I infiltrate the stormwater? There are several easy options to choose from for most residential building projects. Larger projects usually require engineering. Retaining native vegetation and reducing hard surfaces as much as possible will reduce stormwater runoff and help you comply with the stormwater code requirements.2 What is required for my building permit? Keep stormwater in mind when planning your site. The Stormwater Calculation Worksheet is required for all building projects and stormwater treatment must be identified on your site plan (see reverse for an example). During construction, and after, projects must prevent stormwater from leaving the site (refer to'2.5.2 Minimum Requirement #2: Construction Stormwater Pollution Prevention (SWPP)'). What are my options? ln order of preference from the 2072 Stormwdter Monagement Monuolfor Western Woshington, Volume lll, Chapter 3 "Flow Control Design" (Page 3-2): Stormwater Option Site Conditions Best Management Practice (BMP)* Guidance 1 Full Dispersion or 65/10 lf the lot is large and has enough retained native vegetation, the stormwater can be dispersed into the exiting vegetation on-site. This option is called "65f LO" or "Full Dispersion" because 65% of the native vegetation is retained and not more than L0% of the development site is converted to hard (impervious) surface. BMP T5.30 Full Dispersion 2 Downspout lnfiltration lf the lot can't meet full dispersion, then infiltration may be achieved using a drywell or infiltration trench. BMP T5.10A Downspout lnfiltration 3 Rain Garden/ Bioretention Rain gardens and swales (recessed vegetated stormwater infiltration/treatment areas) must be considered when required (>5,000 square feet of hard surface). They are one low impact development (LlD) option that incorporates native vegetation and a landscape approach to protect and beautify the property. Rain Garden Handbook for Western Washington !utter, Downspout & Splashblock The easiest, most common option is to use gutters, downspouts and splashblocks that meet code requirements. This approach provides less aesthetic and habitat value for the property. BMP T5.108 Downspout Dispersion & Design Criteria for Splashblocks *These BMPs are from the 2012 Stormwdter Monogement Monual for Western Woshington. Other things to consider: o All infiltration systems must be a minimum of 10 feet from any structure, meet all critical area buffers and setbacks and be a minimum of 10 feet downgradient of septic drainfields. o Depending on soils, critical areas, other site constraints and the amount of stormwater your project generates, DCD may require engineering and/or professionally prepared plans. . Try our Coaching Service if you have questions or concerns about stormwater on your site. I There are exceptions to lfris such as a Geotechnical Report recommendation or where infiltration is not feasible because of poor draining soils. 2 Refer to JCC 18.30.070 and the Stormwater Management Manual for Westem Washington tor more detail. 4 oo Example of Site Plan with Stormwater flow control and drainage elements lr-Ip,-l f*or:ii Torm l$pervrousSunr*ce '1776 sQ- FT. Extsrtr*c, coNTooRs 4f;.6 sttotilN kpnc t{- PtPe {,}/ l' iiol-E r$ r"&p ftxo 9Tft8IL.€D OffL€T RaN GteD€N oePrrNs Se. FT. HousE ' 185 s,a. Fr. I t I I t t ! a I DDR*h'lFlEt F Lr, LU TL(3 l*-* l-*.--..--t PEIVATE Ulell I *4ar6tl ilNJP$Jt G*P.D€N R*rxe*s.om-lB0 sQ- rr oaarr.rs 909 sq. rr. {'PtPt tt/ l'role ts l*P DE DITCH. G:IPLANNINGIGRANIS- Apps & OppoftunitiesV1l| EPA GRANTS\2010 EPA - Watershed CentePROJECT MGMT\Task F-LocalOrdinance\SWT HandotlslStormwater Option s&G uid ance -F in al 3 -3 1 -1 4 RESERVE ELDDR*INF 9xQ310, J-{ 3J f,PCFlilFrrrt ff t-U UJ (} Fl- I I I a t I I I a I l I I I I i I I I I ! t oo Ooodmanr lna 3t?7 t?017 2495 Cape George Rd Port Townsend, WA 98368 Mairro: Debra SwansOn 40 ARDEN ST Port Hadlock, WA 98339 FoId 360-38a.7155 PROPERTY INFORMATION Location:40 ARDEN ST Owner: This report does not assure approvals by Jefferson County Public Health for ANY futurc building permits or development. COMMENTS & G EN ERAL I N S PECTION'VOTES Deficencies Were Noted: Corrections were made to resolve the deficiencies. c@F v Lf Here Fold Here lnspected: NnOnU7 - lnspection Type: ROUTINE - Correction Status: All corrections made Company: Ceftmcailon - Level 1 Work Pefiormed By: Goodman, lnc. Doug Nebel Submitted 03/2720 1 7 by: Doug Nebel ONSITE WASTEWATER TREATTEilT SYSTET INSPEGTIOX REPORT Tank was pumped on 03-20-2017 . Riser installed at time of inspection. New site drawing sent to H.D. GENERAL S'IE & SYSTEM CONDITIONS lf deficiencies were identified on last inspection were they corrected before or during this inspection?N/A NO, describe in notes, NA = no deficiencies on last OSS Components, structures and appurtenances located per as-builurecord drawing (reference Septrc Permit # in notes). lf NO, describe in notes and if no as-built exists or changes made, state NO and Corrected record to Health made to the OSS (valves adjusted, timer settings modified, ports installed, etc.) (lf YES,NO describe in O'VS'TE SEWAGE SYSTEM NSPECTION DETAIL The General Site and System Conditions were:Fully lnspected All Components accessible for maintenance, secure and in good condition YES Surfacing effluent from any component (including mound seepage):NO Components appear to be watertight - no visual leaks:YES lmproper encroachment (roads, buildings, etc.) onto component(s):NO Component settling problems observed:NO Abnormal ponding present for one or more of the disposal components:NO Subsurface components adequately covered YES Owner compliance issues noted NO Site maintenance required (e.9. Landscape maintenance) lf yes, describe in comments:NO Occupant compliance problem (occupant not operating the system properly). lf YES, describe in notes:NO The house/structure was vacant or used infrequently, assessment of the drainfield was not possible.NO ls the SEP case in a finaled/completed status? (if NO explain in comments)YES Fully lnspectedThis component was: Component appears to be functioning as intended:YES YESEffluent level within operational limits (if NO explain in mmments): All required bames in place (N/A = No baffles required):YES N/AEffluent Filter Cleaned (N/A = Not Present): Compartment 1 Scum accumulation (lnches, if other specify):7 N/AEffluent filter/screen needed cleaning on arrival Compartment 1 Sludge accumulation (lnches, if other specify):8 1Compartment 2 Scum accumulation (lnches, if other specify): Compartment 2 Sludge accumulation (lnches, if other specify):1 YES CorrectedPumping needed: 1 000Approximate Gallons to be pumped (if needed) by Certified Pumper: TANK: Septic Tank - 2 Compartment ReportlD: 581056 View inspection reports online at www.onlinerme.com Page 1 of2 Tax lD: Use: Residential, Single ar ?1 ?0D Fully lnspectedThis component was: YESComponent appears to be functioning as intended: NOPonding present? lf YES explain in crmments: D ra i nf i el d ( di s po sa t ) : G rav ity fhis frport indbates @ftain chilacteisti8 of the onsiro sewag€ sfdem at the timo ol visit. h no way is this report a guffinlee of opeati@ q tuture peiorman@ ReportlD: 581056 View inspection reports online al www.onlinerme.com Page 2 ol 2 o e ffi4hrc. 2495 Cape George Rd Port Town*nd, WA 98368 ilrflro: Debra Swanson 40 ARDEN ST Port Hadlock, WA 98339 -E!_ 360-385-7155 PROPERTY INFORMATION Locafon:40 ARDEN ST Port Hadlock Tax lD: 961800504 Use: Residential, Single Family (3 bdrm) GENERAL SYSTEM TYPE: Gravity Owner Debra Swanson thts roport dooa not asauro approvab by Jefierson County Public Hoalth for ANY futurg bulldlng permhs or developnrnt COTTE'VIS & GENERAL' NSPECNON'VO7ES Deficencies Were Noted: Corrections were made to resolve the deficiencies. was pump€d on 0?.2G2O17 . Riser installed at time of inspection. New site drawing sont to H.D. GENERAL S'TE & SYSTEM CONDITIONS compliance issues not€d required (e.9.dascrib€ in comments: compliance problem (occupant not opeEting the system properly).describe noles: d6fcionci6s ware identined on last inspection were they conected bebre or during this inspection? describe in NA = no deficbncies on last Componcnts, struciures and appurtenances located p€r asbuilurecord drawing (reference Septic NO-Core.led # in notes). lf NO, describe in notes and if no as-built exists or changes made, state NO and record to Health rnade to the OSS (valws adjusted, tirner sottings modifiod, ports installed, etc.) (lf YES, in case in a status? (if NO oxplain in comments)YES O'VS'TE SEWAGE SYSTEi' INSPECTI/ON DETAIL lL LT HeB Fok Hcre NO NO N/A lnspectcd:03f2M2017 - lnsp*tion Type: ROUilNE - Corccfoa Stafrrs: All cor'rections made Company: Ceftifrcation - Level 1 Wo* Pefiormed By: Goodman, lnc. Doug Nebel Submitted 0n7nu7 by: Doug Nebel OiI€ITE WASTEWATER TREATTENT SYSTEH INSPEGTION REPORT The General Sile and System Conditions were:FulV lnspec{ed All Components acceseible for maintenance, secure and in good condition:YES NO YES NO effiuent from any component (including - no visual leaks:appear to be encroachment (roads,etc.) onto Component setuing pmblams observed:NO Abnormal ponding present for one or more of the disposal components:NO Subsurface components adequatev co\rered YES hous€y'structure was vacant or ass€ssment of lhe drainfield was not possible.NO Fully lnspededThis component was: YESCompon€nt app€ars to be tunctioning as intended: YESEtru€nt level within operational limits (if NO explain in comments): YESAll required baffe3 in phce (N/A = No baffies requir€d): N/AEffuent Filter Clean€d (N/A = Not Present): 7Compartnent 1 Scum accumulation (lnch6, if other specify): N/AEffuent flter/scre€n needed deaning on anival ICompartment 1 Sludge ac@mulation (lnches, il other speciff): 1Compartrnent 2 Scum a@umulation (lnches, if other speciry): ,| Compartrnent 2 Sludge acsrmulalion (lnches, if other specify): CorrectedYESneeded: Approximate Gallons to be pumped (if needed) by Certified Pumper 1000 IANX: Septic Tank - 2 Comparlment RepordD:581055 Viaw inspeciion rsporB online at www.onlinerme.@m Pa96 1 of 2 o o DEPARTMENT OF COMMUNITY D 621 Sheridan Sueet, Port Townsend, !ilA 98368 Tel 360.379.4450 | Fax: 360.379.4451 Web: rvww.co.ie fferson.wa.us /communitydevelopment E-mail: dcd@co.i gff-qrgonrya.gr ,; c ??0p PERMIT FEES WORKSHEET Name Oconnor Estimated cost of proj..t @ Parcel # Permit # Covered porch Building Base Fees Building Base Plan Check Review Land Use Review Septic Review Potable Water Technology/Scan State Fee Srao.oo s9o.oo Szg.oo Sq.so Other Fees Shoreline Exemption Zoning Zoning New Address Public Works Tota! Fees s297.so Z Receipt Number: Cash/Check/CC: Date: lnitia ls: Office Use Only