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HomeMy WebLinkAboutPermit File BLD-2021-0242 1504 Lupine Lane REVISIONS SY �QFDR CODSc0,4So j CjillipiA it _ .� I0 7 6 0 ) 0 lr�n ti��Pi ,� 4 i t4`.' (,,r•sc , S,e''' , (RelPill\,4) koCitki, ‘4 Ij 2/ e W +f - . .. / • . # N.5t 6IfiLti co te--, ...-0(pc,c) ./.. f` f, / " / , / . 4 iS70 N.-. / 1�� Gol2 / IV o PRIY / ,,-- k i , , [ . . ...,. . , ,.. 1. j _ \ , ;..6...„,,'c0-- -11.1 * -,' ' ' A. W iI F _ .., 1 , ' ' 'I Nk/l I /p/.is/:/../ :to___c_-r 4-1 .---1 , le,..R.-.-...2._-t ,,,..,. ,,., .r. *,,., • • \--,., y { . 1 R I / . - . u ,. , . : ,000/ f �,.. Ut.. G-. tiAo filiv -lam i-Cr J/ 1441 I ,..,' i,' ,,,,..' 1.--'..::::),4 � , f t!1 ."/.1-1e.k-II) . tliAF1.4 ,_. ' C Q1,..1 ta>‹.i. -1-, rk422r, - i „. . C361 tC>C>l i 4., -,e.!? . k. . . - 1,...6r2..-14,.... . - - - _L.1!•N,i,[Li .13 g-t-4 ' ra, 0. _ . ...... . „ . , .„., ___I . i 0- e =H-.10.) ..., 1 ' (411‘411.3) I I : 0 ////j//////// /7///*/ ":////, , ": ; t.\''''''‘J; : 1 \*1;' : L /. : cc,- ,4 .1 - ---fir. _ 7 R. t fff V" /‘,,,,.,,,y„' 6 0 1.1 • i t4. ,:,,..9 i • . . ij) _ .. , : 1 1,....„I . ' ', . • . - . r / 4 �r 4. •.: iM400-fitiolev:a.R . 3 1 i�,�i-' '�"� . e. -- ,� .� {.f 15;!I ..,„ .11„, )ti 4'it"1-, .; : kl: • —1 121 . -ti 1 ? i0 . ii- liti -',:,.., . Wite :Nib 1 1 11, Cir ACA1 > ;a 0ty' y i t...._,T; , . i , , . J i : ts.,H-A- , , 4 ' Li i ; , ...,, r i . CITY OF ANACORTES —LI L) )4.. Ili! PLANNING AND BUILDING DEPT: — = , APPROVED PLANS • REVIEWED FOR CODE COMPLIANCE t A. t PERMIT #: BLD-2021-0242 El : ' ' ADDRESS: 1504 M AVE . APPROVED BY: 1'?-'-c'ti SUBJECT TO FIELD INSPECTION. APPROVED PL S SHALL NOT - A BE ALTERED WITHOUT AUTHORIZA ON. Date 2.j . ' 1 Scale, ,N } Drawn jft Job Sheet 3t Sheets • 24xse a:.Enrs+ ,./.-. N bS -P - .T Pt -C'- 12f i1 CI c7106nsee YMY T5.13 �2I ?ti yJ� _._._,. _ RPOST.CONBTRU(TION 7.. " YY ♦0 0' non QUALITY AND F eff/Q7Iji DEPTH ON ALL RL� DISTURBED SOILS _ • fir...,. • • I (RAC 7 • BMP C103 i — • HIGH VISIBILITY FENCE • , j, S 1'— � -_R ALONG ALLEY TO MARK t :P f.+ P' t•"I' ' r,+1 is' 1 ^• - , CONSTRUCTION LIMITS . HMP .'1 + I �r._117 ©I . 5k° �.W r CCINf'Rta'I: WASHOUTJ TUP. NO DIRECT - - -- D'ISCHAROS 70 EXISTING HMP C10'7 RF r�I �jH a � f'S)NSTRtIC:'1ON PARKINd AR FA ..I-� COVERED WITH CRUSHED RO:'K BMP C;.)+ �'(F�4�o'I. }f���y� �CONNECT ROOF lihOE 4 SILT FENCE AS CONDITICIC /LY TO EXISTING STORM SYSTEM OR C::Y ONT11. ,,NcHLTE IS POVNED. REQUIRE _. SPLASH BLOCKS TO DIRECT ROOF 1r IIII'' DOWNSPOUTS AWAY FROM THE NOOSE. 1W Li�N 1)sc..1,O �(_LU! (_ -�-IbycvS �`' i 3 (•.1-�. A-k,- PI C 3) a1 1 L1.1- 11,4 scoi lw ° ° 14' e Pr. 1-NibsCAP.ED, 6ANsr-) 62-cno 40.i. oido TIRE t P .i,9vz vl rives Cv8i '+ - I Z u N ii'S 11 1. .7`+_ iQs --A-NU by ' L5 EQ,`) €E-CP"to i 0 .. 2 )•\74;Nt 1..4 01 1 1 11 AVVON i 1 1.,0 OCGOO (0'4-\./1 -31 i L. i`\XI N.)(-v gar 44.... C)0 0 GQ 00 6Z')(X-)CkN4).. ..*...v.-......--...- 47' ' i S WZIT noa I c 1 a i 0 .0 . I 6 k 0 - 3 7) OW1 LirisafrN 74 ILYtia 81-0 r-**14,1"- f"rliS4 a J-- 114 AcQ Glat:11.144"ta -1117 ., ... 0, '•>f 0 ‘16 Ci ns g L T-1 ( da di ,:-.• a) a,es &-x. qi ] ..... auppeopommINMIP ; I 1 „ , • -—5-11.°:' g.,:,;51,,,,,,,,T. riorsP, 1, 7 C,`.1 .....,n (0 1,0142q) 4.Yt (P .---* ,. 7 I .,I41 , 3 .. . 0 ,_ ,... .., — .4 01 .4.3 , , ...., 1 , _..3. , ....., F. . . , 1 r _ i 4_ ____ •.4 .11 -1 -- --IL.. ' k b, 0 1 I' F 6V 'V. 41 1---1. -777)1-1 LAC 44, r4--.41 1-. 1 i 4-N3 CtillIo?),.401,4,-°14 ....\'y .• i — — r•••C1( - -. 1 :17--,, — _. ...... .. 4, Is . 4 , i 39 , --.e)' t1J 3ricidS c•34:10 0 IC to -2V/-/ ' itri aAcza 5.. aimetto7 NO - - - ---- 'Wo,-1 -*-. d.iagi— ! ___ -------- -.... la 691001A219 CN - ; -e'b 4ccNCT c--,4'q- Jr.1-74AtafII I v % , n) 1k t kJ CT: %II-71 101 4,-)s4 It ,� , REVISIONS BY . _ LL.T P v-- eJ t:2. 7.et2---, '---"s/ ':::5- ' • J ---.74r FOR coDE _ _ . 2.. 47 .. t >_1 __ , tf.. . c-__. / / --r- _ � 1 A �0.0 c>,4^, . i 3!i}- S. ►:: : .. � ::": .: :.:��_.'�:.: .:. _ ._.. r8.-:.. .. V I14. L.. z t,.,l y w G1 C G� 9r WOOD I-JOISTS, GYPSUM WALLBOARD, t/ ` r r ?X e,447`1'4. . s,C%. ./ H.w fkt�+ Ci- l-I ? /z, 60 x.4�L- m RESILIENT CHANNELS --�— ��-� ---- --�- -y 1/2 type X gypsum wallboard applied at right angles to resilient channels 16 aO ,_ TERJ, ia9i e'a 11/a"Type S drywall screws 12"o.c. Resilient channels applied at right angles _ �.._.a., • -._, / of um 91/2" deep wood I-joists, with minimum 11/4"deep x 11/2"wide flanges and .� um 3/8" webs, 24" o.c. with 11/a" Type W drywall screws. Face layer 1/z" type X . Olt / r k �rorlELOgpsum wallboard applied at right angles to channels with 15/8"Type S drywall screws Olt X 3� ,� .,. ,- 12"o.c. Face layer end joints located midway between channels and attached to base ---- — f p1 i o x S yl . ._. .w._. 1� S.A. 1 " layer with 1 /z Type G screws 12" o.c. Edge joints offset 24" from base layer edge joints. Wood I oists supporting 5/8" oriented strand board applied at right angles to I "- " " � - 1 1 pp 9 pp 9 g �-_ ,t joists with 8d common nails 12"o.c. Approx. Ceiling - _ ' ` -14614 *.__ ._ "-- - ? ., Lrl}�` },. Imo,tt, cal. STC and IIC tested with 40 oz carpet over 1/4"foam pad. Weight: 5 psf Fire Test: NRCC A-4440.1 (Revised), ecl _ 6-24-97 I— Sound Test: NRCC B-3150.2, 6-30-00 IIC&Test: (68 C& P) w�u .. . . . .. _. NRCC B-3150.2, 6-30-00 - . rile,- .1 : ; 1- - mow .. Stair tread -. 2_* ; - _ : ::_, .._. ::;_ s__\:zF i*� I:.:- ". 4137Di ._li t N :._, . . Stair jacks WS6-1.3 One-Hour Fire-Resistive Wood-Frame Wall Assembly 2x6 Wood Stud Wall — 100%Design Load —ASTM E 119/NFPA 251 0 5/8" GWB to run 0 continuously past the • © O _ stair jacks at fire rated walls. \ Fire rated wall , 7 ► II The floor between \ s the main structure a _ �� \ \ \j(), \ \ / \ ill-g',' �'.�',� and the additional \) ! �'` 1 III '� ' dwelling will need to �� ! 0.-- be 1 hour rated. rri ,ri r . rirrrriii rriliirirrlirrriiir�iirrirllririiriiriiri �iiiirr riiiiiriirrriiirirriirirriririiiraiiriiirl FC5111 is - . - g acceptable. -^ 1 1 C :` ' 1. Framing-Nominal 2x6 wood studs, spaced 16 in. o.c., double top plates, single bottom plate .. 2. Interior Sheathing-5/8 in. Type X gypsum wallboard, 4 ft. wide, applied horizontally. Horizontal joints are un- • �- I . . tCA(, 1 ; L- . 1 A.C. , 4.0i s11‘ � blocked. Horizontal application of wallboard represents the direction of least fire resistance as opposed to vertical 1.' l' b . a,E l I.I „CP' - _01 - apphcation' - °c 'r C, e� 3. Exterior Sheathing7/16 in. wood structuralpanels(oriented strand board), a lied vertically,horizontal - applied Y, joints . , e blocked `i b-1 t6`<.. i � ;f - _„ r- 4. Gypsum Fasteners - 2-1/4 in.#6 Type S drywall screws, spaced 12 in. o.c. =Q Vie. ___.__..-_, __.__ . . vi 5. Panel Fasteners- 6d common nails (bright) - 12 in. o.c. in the field, 6 in. o.c. panel edges `` l 6. Insulation- 5-1/2 in. thick mineral wool insulation(2.5 pcf,nominal) 7. Joints and Fastener Heads -Wallboard joints covered with paper tape and joint compound, fastener heads covered with joint compound `' tiP- Tests conducted at the Fire Test Laboratory of National Gypsum Research Center ° ` me3I-L'r7`7 Test No: WP-1244(Fire Endurance &Hose Stream) February 25, 2000 fA � +,i Third Party Witness: Intertek Testing Services Report J99-27259.2 4 ._ I It , . 11 - , L1 . This assembly was tested at 100% design load, calculated in accordance with the 2005 National Design ' Specification®for Wood Construction. The authority having jurisdiction should be consulted to assure ,- acceptance of this report. x ; . , ! � -, , � ` 01�. (mil- " ?.t x1 .�} 01 ___ 1 ( I ) . GA FILE NO. WP 3661 GENERIC 1 HOUR _0` . FIRE � GYPSUM WALLBOARD,WOOD STUDS, + e t MINERAL FIBER INSULATION ' 5R _ 0" Jim / . One layer /8"type X gypsum wallboard applied at right angles to each side of 2 x 6 wood ��—/ ��-j ..._ .. ._ 4 studs 16"o.c. with 21/4" Type S or W drywall screws 12" o.c. 51/2" mineral fiber - 1 ', �' ' `" " " `"'"' " insulation, nominal 2.5 pcf, friction fit in stud space. ( j , ■■ -=-f C/� Vertical joints staggered 16"o.c., horizontal joints staggered 24"o.c., on opposite sides. Tii ■�NUI r rs 1-1 1.-C...--("5><.� .1.1-.) 13 0 !' ) - te" l ak) Tested at 5,156 lbs per stud or 100 percent of design load. (LOAD-BEARING) N I \ I Cyr. s 0 Thickness: 63/4" Approx. Weight: 81/2 psf IN 1 = Fire Test: ITS J99-22441.1, 10-99 1-.. �` ; / . --oo . o ' I p• . . .. .0 0 It;... L k/10 9$ (fie"1-vi,) �0 ( I . ) r,,,,- i GA FILE NO. WP 3614 GENERIC 1 HOUR 30 to 34 STC 1 GYPSUM WALLBOARD, WOOD STUDS FIRE SOUND 0 0 -'` One layer 5/a"type X gypsum wallboard or gypsum veneer base applied parallel or at right \\��� angles to each side of 2 x 4 wood studs 16' o.c. with 1 /a"Type W drywall screws 12" \\\\\�. c.c. X A Joints staggered 16 on opposite sides. (LOAD-BEARING) it { X `,..N ,.. .. LA,U0t2 r. 1,.,1 ; ...._ ..k„i.. 1 7 Thickness: 43/4" '4 _. 1# . F 4 11 1 Approx. Weight: 7 psf 1 Fire Test: SWRI 01 4511-619[1], 3-94 .� Aro Sound Test: See WP 3520 �,,, L z 12 ' (G&H NG-246FT, 7-2 65) I • I 1 v t,ii , 1=-f 0 � , *, _____4------ 4 . 11 Or It' Date II� Il00 I Ill _ i y ♦i �° .7!4I i i l - Scale .0` . //1 G)II / - '.22'3-©II / Drawn Job _ ,ye, Lo"- ._ .. -- " . Sheet 2 Of Sheets 24x3e a. nsaae REVISIONS BY o40,conE c0� -*w iiimphle,1Y A�,,-' 9rn NG�'rr, 891 �c�`'o. Gt1 Y O c'cto FIELD t�se� - IM k74)1410V PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT 1C0*-' DEPARTMENT Mailing Address: P.O. Box 547, Anacortes, WA 98221 Office Location: 904 6th Street, Anacortes WA 98821 Phone: (360) 293-1901 Instructions for Printing Digital Plan Review Documents This City of Anacortes Planning,Community,and Economic Development has adopted an optional digital plan review process,in response to COVID-19,for those who wish to reduce contact or reduce natural resource use. If you have any questions please contact the The Permit Coordinator at 360-293-1901. We are also interested in any comments you have to improve this system... It is the applicant's responsibility to provide copies of all approved submittal documents for use on the job site. • Documents with color or with approval stamps are to be reproduced in color, or black and red. • Documents shall be provided in full size, and to scale. • It is advisable to protect the documents from inclement weather. Plastic , sleeves are available upon request. • All drawings, engineering, surveys, and supporting documents are required to be on the job site at the time of inspections. If documents are not available, the inspection will be cancelled. After the second i 11 i ,l cancelled inspection, a re-inspection fee will be charged. e `4 r �l ��� z IILl- `l " ''5-� / 0�E-II Be sure your packet includes: I 0 4 L �I • Permit ' • ♦ is- _ • Permit Inspection Card, print on heavy stock if possible. This will need to last the —� ; " � duration of your project. ' • Site Plan - (-A • All Drawings -' i gA • Stormwater Plan or SWPPP "A' • �-- � "�� 1 .• � G'(2,6 SIC.iEorC# # Z.. .` ' • Engineering, if included in submittal • Landscape Plan .` ' 0; I ‘7r'' . , • Any other supporting reports or documents z . 0 ,� ; ; 0 0 I Being properly prepared with the necessary plans on site will allow our II to inspectors to complete your inspections. We appreciate your assistance. - ; , t , PE4''t4- 15-P.-, L.L. I 04, ---1: *, ' , 0 (-0.- NtiVsN'ti) ktowau--IbtANtlotaM 1 il 0, • ,_, 1 1 1001, i , \ ici.) : -------.4 _ .Y. __. b_ !L tau MIN �/ €€ �"' Stove pipe o 1 't` b IIIC terminate 2' above 1-41 i. _� .- 1 ICI- �i_ _ -V tC any roof surface -- �{ i�C..;�M -� within 10 . A 1.-P •1 ;,A.i2-, , , , ,51k\\Nc,,...):‘,,,,, oOnk 41.6 / r / 0 0- -.1 kA11-1, '..'2,.I , e.,L..., ' -/ 7:4*il 0 Q 41, / 0 \5 11' cr i 4C 1 @,_______Cary 41--z, k a t, dP ��',t t _,__ t f • s 0 .z.. ' = i , 0 0 U ..* -#4- 7tZt (Al-i.,,,,11:3;t7:"6-W-1.. . -1...t.,.40e4.1.41)' 1 It Agr L ti.„ I~ Ali r ii, ` �, I� � ��., � Date , , - . �?e 1 per.= l 1 iS .14e. .{t':' 1)4 , AT ,1De-- Scale , .� .. , ��#i tw gll �! �ii ,� Drawn t Job LI Sheet .ezi Of Sheets 24 X 34 cLEARPRINT• o4oR CODE co ��`���G1T I" O A{9 IN MIMS .. �89� '}� O� 0060 AMP T5.13 O G�� C O ��` POST-CONSTRUCTION. �rIY FIELD 1145e SOIL QUALITY AND ` - DEPTH ON ALL 9 DISTURBED SOILS \. unl NeU rww�,!- u.c.rE o' BMP C103 --,� f..— HIGH VISIBILITY FENCE J �,: ALONG ALLEY TO MARK 1 wl P.-a>- p E- E't1 Ile ' �. I rK MP w CONSTRUCTION LIMITS r -(aMW C� — .µ F • f tl BMP C154 CONCRETE WASHOUT I. - - TUB. NO DIRECT\ '"� —. DISCHARGE. TO EXISTING ^ SOILS. '�� e�ac.., ester. y AMP C107 " Ir CONSTRUCTION PARKING AREA COVERED WITH CRUSHED ROCK IIMP C233 e I 45 CONNECT ROOF 0 NAGE UNTIL CONCRETE IS POURED. 'SILT FENCE AS CONDITIONS TO EXISTING STORM SYSTEM OR USE REQUIRE .- n..npr.-.:r SPLASH BLOCKS TO DIRECT ROOF 1111 ' �T� —_____.___..__.___DOWNSPOUTS AWAY FROM THE HOUSE. {''W S LAN scAO A.LLi! LAkfisv ca , 3 t.�-E A�.- Pc (e. 3) °\ t Li 1- w -1 �(gypp (\ I N- A C� ^^e 5601,El). CoRiNs9 ^ L IJ {V 14L �'m& c stRv 0Y\Ge&o 7 '+ — 1.Z ur 4-5 d1a \-aL by 2 Z3 i R'W ` R f i=) `0 .. 42- lock«a okiNc, 0 0 4, . A oFo O° C C'RASc� C_AvJ c-J 4 Y '°c, M s G��4, C 0R .�` c)-' r „..,-,R\r" .,ria.1,),),, - gro A-m.)1/100 /7/ "___- I , _ - • a 44 r--..- ,,'' i4 -:!,: nf.-P;*el' Pirk LTC* CC7FM0) i CA G,.. H GL i GL. Gt x p .. i 1 ..... .. �. . t N t y IJ Gam+{+. L NA a w+•I ® , ,s,..4 , r, O '� ID { !'k 0 1 0 LIN W m ,0tab o 5P! .� 0 lig iST2 lc° 1.01,'/./Ii! , o..1 Or,DCX)o9oO CYO 0,0 IA 1?-n M.(cZfi Le- • ir,, xw►y RILE- :0, L artaa, • r--1 . .us kJ:JF . I , REVISIONS BY FOR CODE 2018 Washington State Energy Code-Residential <o Y 4*) P„wrierrescriptive Energy Code Compliance for All Climate Zones in Washington C O� 9� o Single Family-New&Additions (effective February 1,2021) r `Y �11k These requirements apply to all IRC building types, including detached one- and two-family %, 4COR°'��`o dwellings and multiple single-family dwellings(townhouses). TO F'cuv v-or4 Project Information Contact Information. i t co PA A V Ak cc,y E ii1/4.) ° 1 G A rc.. t-E.. . z I. _ ' - 12-1 g--- ?)(o g Instructions: This single-family project will use the requirements of the Prescriptive Path below and incorporate the minimum values listed. Based on the size of the structure, the appropriate number of additional credits are checked as chosen by the permit applicant. Provide all information from the following tables as building permit drawings:Table R402.1-Insulation and Fenestration Requirements by Component,Table R406.2- Fuel Normalization Credits and 406.3-Energy Credits. Stove pipe to terminate 2' above Authorized Representative f' Date ' , cAi Lx. � �q��� any roof surface -- within 10'. Please All Climate Zones(Table R402.1.1)I a note this on plans. Mr 10'-0" ►1� R-Value U-Factor Fenestration U-Factor b n/a 1 0.30 10 Skylight U-Factor b n/a 0.50 Glazed Fenestration SHGC b,e n/a n/a Ceiling e 49' 0.026 Wood Frame Wall g,h 21 int I 0.056 Floor 30 I 0.029 Brace stove pipe per manufacturer's - Below Grade Wall `,h _10/15/21 int+TB _ 0.042 - _.....__K_v__� ---- = (Slab d'fR-Value&Depth 10, 2 ft I n/a installation instructions. R-values are minimums. U-factors and SHGC are maximums.When insulation is installed in a cavity that is less i a than the label or design thickness of the insulation,the compressed R-value of the insulation from Appendix 4-- j, , Table A101.4 shall not be less than the R-value specified in the table. b The fenestration U-factor column excludes skylights. "10/15/21+5TB" means R-10 continuous insulation on the exterior of the wall, or R-15 continuous insulation on I the interior of the wall, or R-21 cavity insulation plus a thermal break between the slab and the basement wall at - c the interior of the basement wall. "10/15/21 +5TB" shall be permitted to be met with R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the wall. "5TB" _ _ __ ___. _ _� t means R-5 thermal break between floor slab and basement wall. d l R-10 continuous insulation is required under heated slab on grade floors.See Section R402.2.9.1. e For single rafter-or joist-vaulted ceilings,the insulation may be reduced to R-38 if the full insulation depth __.__ _ extends over the top plate of the exterior wall. -` -- I R-7.5 continuous insulation installed over an existing slab is deemed to be equivalent to the required perimeter - f slab insulation when applied to existing slabs complying with Section R503.1.1. If foam plastic is used, it shall I _ _ _____ meet the requirements for thermal barriers protecting foam plastics. For log structures developed in compliance with Standard ICC 400, log walls shall meet the requirements for _ / . g climate zone 5 of ICC 400. %� - / l -� _ Int. (intermediate framing)denotes framing and insulation as described in Section A103.2.2 including standard - - _ / h framing 16 inches on center, 78%of the wall cavity insulated and headers insulated with a minimum of R-10 _ insulation. _ ____ _ / - 1111 t1, i , ! , Prescriptive Path-Single Family 2018 Washington State Energy Code-R 1 _ . .._.. - �""I..at,. _. 2018 Washington State Energy Code-Residential V4!I=(}d Prescriptive Energy Code Compliance for All Climate Zones in Washington Single Family-New&Additions (effective February 1, 2021) Each dwelling unit in a residential building shall comply with sufficient options from Table R406.2 (fuel normalization credits) and Table 406.3 (energy credits) to achieve the following minimum number of credits. To claim this credit, the building permit drawings shall specify the option selected and the maximum tested building air leakage, and show the qualifying ventilation system and its control sequence - of operation. 1. Small Dwelling Unit: 3 credits Dwelling units less than 1,500 sf in conditioned floor area with less than 300 sf of fenestration area. _ - Additions to existing building that are greater than 500 sf of heated floor area but less than 1,500 sf. 2. Medium Dwelling Unit: '`3 credits All dwelling units that are not included in #1 or#3 3. Large Dwelling Unit: 7 credits Dwelling units exceeding 5,000 sf of conditioned floor area . 4. Additions less than 500 square feet: 1.5 creak,_ All other additions shall i,iaet 1-3 above Before selecting your credits on this Summary table, review the details in Table 406.3 (Single Family), on page 4. l'L- 1 7I Summary of Table R406.2 Heating Credits-select ONE Fuel Normalization Descriptions User Notes Options heating option 1 Combustion heating minimum NAECAb 0.0 0 --' 2 Heat pump` 1.0 ❑ 3 Electric resistance heat only-furnace or zonal -1.0 0 Li leg, . 4 DHP with zonal electric resistance per option 3.4 0.5 I El . 5 All other heating systems -1.0 El - Energy Credits-select ONE I EnergyCredit Option Descriptions energyoption tion from each IOpbons category d - d 1.1 Efficient Building Envelope 0.5 0 I 1.2 Efficient Building Envelope I 1.0 0 -` =� "w 1.3 Efficient Building Envelope l 0.5 0 V - -i il I 11 i t ll i-' II I Ii III 4- .. 1 1.4 Efficient Building Envelope 1.0 0 ill 1.5 Efficient Building Envelope I 2.0 ❑ 1.6 Efficient Building Envelope 3.0 ❑ II W _ -_ _. l 1.7 Efficient Building Envelope 0.5 El 2.1 Air Leakage Control and Efficient Ventilation 0.5 _I 0 7 r--- 2.2 Air Leakage Control and Efficient Ventilation I 1.0 ❑ 1 exl14� 2.3 'Air Leakage Control and Efficient Ventilation I 1.5 0 i 2.4 Air Leakage Control and Efficient Ventilation 2.0 0 -_ - a - t 3.1a High Efficiency HVAC I 1.0 ❑ 3.2 High Efficiency HVAC I 1.0 ❑ 1 1 `a I 3.3a High Efficiency HVAC I 1.5 I 0 I ' - - t j I I 3.4 High Efficiency HVAC 1.5 i ❑ a = 4 ' 3.5 High Efficiency HVAC - - - 1.5 - 0 j I 3.6a High Efficiency HVAC I 2.0 I ❑ Date ❑I Scale I 4.1 High Efficiency HVAC Distribution System � 0.5 1 _ 4.2 High Efficiency HVAC Distribution System 1.0 I ❑ l t . 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Sheet Of Sheets 24 X SS CLEARPRINT• �1T Y 0 Storm Water Drainage Report j t Minimum Requirements 1 through 5 ENGINEERING DEPARTMENT 904 6th Street Anacortes, WA 98221 � 6 www.anacorteswa.gov Official Use Only: (Information to Inspectors) Required Storm Water Facility and other related requirements: Bm P TS•13 a 2caS7 m f m P T 5- lb i pGa Tim �I C ml 4-i ac- l ctil Hi 614 ��,ry -•►r 'T -S 2T Scc12-e= 4Gj Lc j ac - PIt L- eat—) ST ot.,•SiT • rn2-$ 2- - et Project Address: _1504 M Avenue Submittal Date: D6.10.2o2-I Parcel Number: _P55556 Revision Number: Permit Number: Reviewer: . . Lc*Jbt- Acceptance Date COA): oS•io.7 c Z1 soL FRONT OF REPORT: Submittal Checklist: (All items listed below are required for a complete su mittal) b o Cover Sheet (Preparer to Provide): Project title, Location, Revision dates, Engineer's Stamp o TAB 1: Minimum Requirement#1 - Preparation of Stormwater Site Plans o TAB 2: Minimum Requirement#2-Construction Stormwater Pollution Prevention (SWPP) o TAB 3: Minimum Requirement#3-Source Control of Pollution o TAB 4: Minimum Requirement#4 Preservation of Natural Drainage Systems and Outfalls o TAB 5: Minimum Requirement#5-On-site Stormwater Managements o APPENDIX 1 - Survey performed by a Professional Land Surveyor o APPENDIX 2 - Soils Analysis (Volume 1, Chapter 3.1.1) FLOW CONTROL EXEMPT 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. FLOW CONTROL EXEMPT 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. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Project Description and Summary: Summary Table Existing Proposed Development Type Re-s ipv.rrLea_ 51 D6a4mu+.— Number of Lots 1 Lot Acreage in SF 9,000 SF Soil Type(s) Catla Gravely Fine Sandy Loam HG D Site Sediment Transport Score (High\Low) Low.96-' g' Low 45 Depth to Ground Water Table (Feet and Inches) N/A Flow Control Exempt (See completed Soils Analysis(Volume 1, Chapter 3.1.1) Infiltration Rate during Rainy Season (Inch\Per Hour) N/A Flow Control Exempt Impervious Surface (on-site) 2,188 sf 2,536 sf Impervious Surface (off-site) 0 New and Replaced Hard Surface Total (SF) 0 2,536 sf Lot Coverage (Percentage) 0 45% BMP (Required Minimum Requirement 5) BMP T5.13 Post Construction Soils 3M1' 175. to P e,1ap Pipe 4N1.1�'10y.A Water Quality Method (Minimum Requirement 6) N/A Water Quantity Method (Minimum Requirement 7) N/A Existing Site Conditions Summary: P (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 existing site has an existing house, garage and a concrete driveway. 15th Street fronts the north and M Avenue to the East with the gravel alley to the south. A Single family home borders west. The site slopes down to the northeast at 3 to 5%. Developed Conditions Summary: (Additionally, to be shown on the site plan. Identify cut and fill areas, proposed slopes of all hard surfaces, proposed contours) The proposal is to add a 1,586 square foot addition and 289 square feet of parking adjacent to the existing parking. The slope of the property will not change. The house will be remodeled. No soils testing have been completed. The project is Flow Control Exempt due to enclosed drainage to Fidalgo Bay. Drainage Basin (2007 Storm Comp Plan —City website\publicworks\engineering\comprehensive plans): What Drainage Basin are you in? F1 Identify any downstream drainage issues (Storm Comp Plan: Yes. If so, describe: No issues are identified for basin F1. 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) Figure 1-2.4.1 Flow Chart for Determining Requirements for New Development Figure 1-2.4.2 Flow Chart for Determining Requirements for Redevelopment Does the project result in 2,000 square feet, or more. of new plus replaced hard surface area? OR Does the land disturbing activity total 7.000 square feet or greater? Yes No Minimum Requirements#`1 through #5 V apply to the new and replaced hard Minim um Requirement#2 applies. surfaces and the land disturbed Next Question V • Does the project add 5.000 square feet or more of new hard surfaces? OR Convert j acres or more of vegetation to lawn or landscaped areas? OR Convert 2 5 acres or more of native vegetation to pasture? Yes i No All Minimum Requirements apply Next Question Is this a road #0 the new hard surfaces and the P. related protect? `' No converted vegetation areas. Yes Does the project add 5,000 square feet or more of new hard surfaces? 1 Yes v - . v No Is the total of new plus replaced hard surfaces . Do the new hard v' 5,000 square feet or more, surfaces add 50% or No No additional No AND more to the existing 0 41-- does the value of the proposed improvements • hard surfaces within requirements. - including interior improvements- exceed the project limits? 50% of the assessed value (or replacement value) of the existing site improvements? Yeses All Minimum Requirements apply to the new and replaced 4____,/ pi hard surfaces and converted vegetation areas. Yes likkillnil Figure 1-2.4.2 Flow Chart for Determining Requirements for milliialRedevelopment DEPARTMENT OF Revised June 2015 ECOLOGY. Please see httpifl ww"ecy.wa.cgoulcopyright.html fr�r copyright notice including permissions, State of Washington limitation of liability,and disclaimer. 2014 Storimvater Management Manual for Western Washington Volume I- Chapter 2 - Page 38 Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Figure0- .5 FLiow Chad for Determining LOD MR #5 Requirements Does the project discharge to Flow Control Exempt Waters(per Minimum Requirement(MR)#7)? Yes • REQUIRED: Implement the following BMPs No where feasible: • BMP T5.13: Post-Construction Soil Quality 'r No(the and Depth Does the project project at BMP TS.10A, B, or C: Downspout Full trigger only rv1Rs#1 - triggered Infiltration. Downspout Dispersion #5?(Per Figure 3.2 or onlyMR#2)) No additional Systems, or Perforated stub-out Figure 3,3 in Appendix Connections 1 of the 2013-2018 requirements • BMP 75.11 or T5.12: Concentrated Flow WVVA Phase II Permit Dispersion or Sheet Flow Dispersion & Phase I Permit). f _ NOT REQUIRED:Achievement of the LID No(the project triggered Performance Standard.Applying the other Yes only Iv1Rs#1 -#9) EMPs in List#1 or List#2. V Is the project inside the UGA? Did the project developer choose to meet the LID Performance Standard? Yes v No Is the project on a parcel .,No of 5 acres or larger? Did the project developer REQUIRED: For each R 1 P- 140 Yes surface, consider the choose to meet the LID BMPs in the order Performance Standard? REQUIRED: Meet the LID listed in List#1 for that Performance Standard through type of surface. Use Yes the use of BMP(s)in the the first BMP that is 2014 SWfv1IVIWIV except for considered feasible. Ves No Rain Gardens(the use of Bioretention is acceptable). NOT REQUIRED: Achievement of the LID If the project can't meet the Performance Standard. REQUIRED: For each LID Performance Standard, it * surface, consider the BMps must seek and be granted an REQUIRED:Meet the LID Performance in the order listed in List#2 exception/variance. Standard through the use of any BMP(s)in for that type of surface. Use the 2014 SWMMUWUexcept for Rain Gardens the first BMP that is REQUIRED: Apply BMP 75.13 (the use of bioretention is acceptable). considered feasible. Post-Construction Soil Quality and Depth. REQUIRED for Projects Triggering MR #1-0`: NOT REQUIRED: Apply BMP T5.13 Post Construction Soil Achievement of the LID NOT REQUIRED:Applying the Quality and Depth. Performance Standard. BMPs in List#1 or List#2. NOT REQUIRED:Applying the BMPs in List #1 or List#2. *Recommended by Ecology for projects triggering iviRs#1 -#5. • 111A131111 Figure I-2.5.1 Flow Chart for Determining LID MR #5 Requirements DEPARTMENT QF Revised June 2015 ECOLOGY Please see httpiAvww.ecy.wa.gov/copyricght.htm/for copyright notice including permissions, State of Washington limitation of liability,and disclaimer. 2014 Stoantivater Management Manual for Western Washington Volume I- Chapter 2 - Page 60 Version Date: October 7, 2019 Previous Version Date: February 20, 2019 TAB 1 (MINIMUM REQUIREMENT#1) • 1-2.5.1 Minimum Requirement#1 — Prepare a Stormwater Site Plan - 1.3— Preparation of a Stormwater Site Plan - 1.3.1 —Stormwater Site Plans: Step-by-Step Note: The level of detail needed for each step depends upon the project size. Provide a narrative description of each step. 1-3.1.1 Step 1 - Site Analysis: Collect and Analyze Information on Existing Conditions Site analysis shall be submitted as part of the Existing Conditions Summary above. Part of the information in this step should be used to help prepare the Construction Stormwater Pollution Prevention Plan. Purpose of the Site Analysis is to provide for a Low Impact Development site design that is intended to compliment the predeveloped conditions of the site. A Stormwater site plan has been prepared showing erosion control methods for this site. The site slopes at 3 to 5% to the northeast corner of the site. The gravel alley borders the uphill southern boundary of the site with single family homes to the south and west. 1-3.1.2 Step 2 - Prepare Preliminary Development Layout Based upon the analysis of existing site conditions, locate the buildings, roads, parking lots, landscaping features, on-site stormwater management BMP's, and preliminary location of stormwater treatment and retention/detention facilities for the proposed development. BMP's will include covering soil stock piles and protecting down slope properties with silt fencing. The temporary construction entrance will be off from the alley or existing parking area adjacent to the alley accessing "M" Avenue. Grading will take place only in the area of the addition adjacent to the ally. Storm water will discharge through a perforated stub out prior to discharging to the city storm system. 1-3.1.3 Step 3 - Perform Off-site Analysis (at Local Agency's Option): Use additional Sheets, if necessary, Ecology recommends that local governments require an off-site analysis for projects that add 5,000 SF or more of new hard surfaces, or convert 3/ acres of vegetation to lawn or landscape areas, or convert 2.5 acres of forested area to pasture. Off-site analysis extends to ' mile downstream of the project site. Storm water sheets to or is conveyed the east onto M Avenue and enters the storm system at the corner of M Avenue and 15th Street and flows east across M Avenue and south 260 If to 16th Street in 15" concrete storm pipe. The flow continues east on 16th Street 760 If to 0 Avenue. Flow continues north in 0 Avenue 557 If in 27" concrete pipe to 14th Street. Storm drainage flow is continues east 1060 feet in 36" concrete pipe and discharges into Cap Sante marina. Total flow length from the property is 2,637 feet or about'/2 mile. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 1-3.1.4 - Determine Applicable Minimum Requirements Establish project size thresholds for the application of Minimum Requirements to new development and redevelopment projects. Figures 2.4.1 (Attached) and 2.4.2 (Attached) provide the same thresholds in a flow chart format. Based on the preliminary layout, determine whether Minimum Requirements#1 through #5 apply to the project; or, whether Minimum Requirements#1 through #9 apply. Please note, that Minimum Requirement#1 through #5 may trigger additional Minimum Requirements, such as Flow Control. The total new impervious area added to this site will be 2,536 square feet and under the 5,000 square foot threshold and triggers minimum requirements 1 through 5. 1-3.1.5 Step 5 - Prepare a Permanent Stormwater Control Plan (Refer to this section of the Ecology Manual for requirements.) A storm water plan is provided in the developed site plan in Appendix 5. The drainage system will be described in minimum requirement#5 below. The options for a perforated stub out and sheet flow dispersion are discussed in Minimum Requirement#5 below. 1-3.1.6 Step 6 - Prepare a Construction Stormwater Pollution Prevention Plan (MR#2— 13 Elements) Refer to Chapter 11-3—Planning for a detailed description of each element. See also attached Tables 4.1.1 (Source Control BMP's by SWPPP Element) and Table 4.2.1 (Runoff Conveyance and Treatment BMP's by SWPPP Element). See attached 13 Elements of a SWPPP, please complete and attached 1-3.1.7 Step 7 - Complete the stormwater site plan The Stormwater Site Plan encompasses the entire submittal to the Local Agency with drainage review authority. Refer to this section of the Manual for further clarification of each item and what is required. See below: • Project Overview • Existing Conditions Summary • Off-site Analysis Report • Permanent Stormwater Control Plan • Construction Stormwater Pollution Prevention Plan • Special Reports and Studies • Other Permits • Operation and Maintenance Manual • Declaration of Covenant for Privately Maintained Flow Control and Treatment Facilities. (See attached Drainage BMP Maintenance Covenant BMP Agreement) Version Date: October 7, 2019 Previous Version Date: February 20, 2019 • Declaration of Covenant for Privately Maintained On-site Stormwater BMP's (See attached Drainage BMP Maintenance Covenant BMP Agreement) • Bond Quantities Worksheet, if applicable The project overview has been provided at the beginning of this report along with an existing conditions description. Maps are included in the attachments. 1-3.1.8 Step 8 - Check Compliance with all Applicable Minimum Requirements A Stormwater Site Plan as designed and implemented should specifically fulfill all Minimum Requirements applicable to the project. The Stormwater Site Plan should be reviewed to check that these requirements are satisfied. To take place during review and during and after construction. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 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. Table 4.1.1 Source Control BMP's by SWPPP Element Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Element II Elemerati2 Element 5 Element01 E lament 05 Elementalill Element012 ElerraernSl9 Preserve Establish Protect Law BHP or Element tip Stabilize Protect Control Maintain Haney the LVegetetlonMark. Construction Soh Slopes Pollutants 13HPs Protect Impact Clearing Limas Access development BLIP C101:Preserving Natured Vegetation +/ BHP C102:Butler Zones 3f BHP CM:High Visibility Piratic or Metal Fence BHP C105: Stabilized CorratructIon Entrance/Erlt BLIP C103:Wheel Wash I BHP C10T:Construction RaacilParking ' Area Smhllrarion BHP C12A:Temperer/end Perm:ment Seeding BHP C121:Hulrhing rI 70 BHP C122: Nets and Blanhete e / BHP C12t:Plastic Covering BHP C124I: Sodding ✓ ®HPC125:Topa:dikg!Composting BHP C120: POIyaerykerhis for Soil Erosion Protection BHP C130: Sulam Roughening BHP C131:Cradled TerracesI I BHP C1410: Bust Control +/ BHP C150:Materials On Heard BHP C151:Concrete Hartdlkmg v' BLIP C152: &smutting end Surlecbmg Poluthin Prevention ®HP C153: Malarial Salivary,Startup and Containment • BLIP C150:Concrete Washout Area +/ BLIP C100:Certified Erasion end I 4, Sediment Control Lead BLIP C1B2:Seheduing +/ Table 4.2.1 Runoff Conveyance and Treatment BMP's by SWPPP Element Version Date: October 7, 2019 Previous Version Date: February 20, 2019 Hewed Element t`1 i ori ent Eleirii I t i < EIetiotIt ei rltt#;1 tlenstit On MAP of 1 ig N r l �i tall P1 atprt PlVtga.lli a ' Cr rfieF C t Iea IIIt • i Ch #'ti Lew Soc no nail impact FlowR.aie4 0I00 :i min In m . P rko�nt WWattiIre SUP e ' ! -li dtiii3i► i • II AP Cal Ortakinel Liam 1 ? 'SNIP i r'Eat. ii ., r ,' • IIRAP C2 Pk*Stogy Drains 1—_- tA I ' �m c4 I !lips. ve I sri P com: Level Bpreadoi v' eroP C.207:: Cha.ck Omit V. lin we . . 1 8 MP 0. 1M Tri inng1A1_ac Sal Dike 043e0m1Ral Ei eond CFietkream) it p 020ar Outlet Preittalfen , • bM P: Storm Drain Inlet Prirbeailor tElM P11231! Er u�� Duller I ,' I I. I3MP CO O :duel IPIII rr Berm • -/ I i 9MP C23 Sat Fetic -le" I r ([IMP C2344 likcesolated Ship1 v" , 13MP t3 Mittlo [ . ve 4 f Brala C2351 Voglti i Filtration 47 ; r I rol 4x� .$hdi1 mt Tri p I 1 BMP'C 'l: Temporary SediveattP Rind 1`' amp 42IIII let 1 stattuaiekt s I r Remit )Tateatinent - i PIllrrt Jcir i El TAP C2.522 High :pi Neuir liz H en LINK} 1 HMP 0 3 pH Centroll for l-IGgP pli Water I l i Version Date: October 7, 2019 Previous Version Date: February 20, 2019 13 Elements of SWPPP (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: Carl Lenander Site Address: 1504 M Avenue Prepared By:_Dale Herrigstad P.E. The Stormwater checklist or building permit determined that: ❑ The 13 elements must be addressed ❑ These elements must be addressed for construction activity adding under for construction activity adding 2,000 2,000 sq. ft. of hard surface area. 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. A high visibility construction fence BMP C103 will be installed along the alley side of the construction. BMP to be monitored daily and repaired as needed. 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. Construction parking will utilize the existing concrete driveway with temporary access from the alley. A gravel area will be provided adjacent to the existing concrete parking until the concrete is poured. 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. Once the excavation is complete and the foundation is poured there is minimal disturbed ground and a silt fence will not be very effective. If there is room and it looks like the BMP C233 silt fence will be effective it should be placed along the east side of the excavation. 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 site will have minimal land disturbance. The parking locations on the east should be stabilized soon after excavation with crushed rock surfacing for construction parking. 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. ❑ 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. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 ❑ 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. 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 and plastic covering. Install plastic covering per BMP C123 on Soils Stockpiles. BMP to be monitored daily and repaired as needed. Refer to Table 4.1.1 in MR#2. 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 site is flat with 3% slope in the area of the construction. 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 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. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 The site is so small that dirt should not be tracked onto the adjoining roads. Drain inlet protection should not be necessary. BMP to be monitored daily and repaired as needed. 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. No stormwater runoff will be conveyed off site via channels, swales, or streams. 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. ❑ 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. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 ❑ 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. Per BMP C154 a Concrete Washout tub is to be installed onsite to capture contaminated water from concrete washouts. To be installed prior to foundation !concrete installation. BMP to be monitored daily and repaired as needed. Contractor is to provide spill prevention kits for excavation and concrete crews are required on Site. 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. There is no practical location on the site for a temporary sediment trap due lack of space. If dewatering is necessary a temporary tank may need to be brought in for discharging silty water. 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 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. BMP to be monitored daily and repaired as needed and or as required by the City of Anacortes. Weekly reports are required to be submitted to the building department. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 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. BMP to be monitored daily and repaired as needed and the responsibility of the owner. Project does not require a certified CESCL. 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. No LID BMPS are proposed. Dale Herrigstad March 21, 2021 Applicant Signature Date Version Date: October 7, 2019 Previous Version Date: February 20, 2019 TAB 3 (MINIMUM REQUIREMENT#3) • 1-2.5.3 Minimum Requirement#3—Source Control of Pollution All known, available and reasonable source control BMP's must be applied to all projects. Source control BMP's must be selected, designed, maintained according to the reference Ecology Manual. The intent of source control BMP's is to prevent stormwater from coming in contact with pollutants. They are a cost-effective means of reducing pollutants in stormwater, and, therefore, should be considered in all projects. Single Family Residential Construction Projects and Residential Subdivisions are Exempt from this Minimum Requirement All Commercial Properties, Industrial Properties, and Multi-Family Properties, Boatyards, Sand and Gravel Mining Opertations are required to comply with this Minimum Requirement. Refer to Chapter IV-2.1 Applicable (Mandatory) Operationsal Source Control BMP's Version Date: October 7, 2019 Previous Version Date: February 20, 2019 TAB 4 (MINIMUM REQUIREMENT#4) • Minimum Requirement#4— Preservation of Natural Drainage Systems and Outfalls Natural drainage patterns shall be maintained and discharges from the project shall occur at the natural location, to maximum extent practicable. The manner by which runoff is discharged from the project site must not cause a significant adverse impact to downstream receiving waters and down gradient properties. All outfalls require energy dissipation. The objective is to preserve and utilize drainage systems to the fullest extent because of the multiple stormwater benefits these systems provide; and to prevent erosion at the downstream of the discharge location. Refer to the reference manual for supplemental guidelines and additional information under this section. Will this project disturb the Natural Drainage System or Outfall of the project Site? No. If yes, refer to section 1.2.5.4 for Supplemental Guidelines for additional information. No change in drainage is proposed for this site. Sheet flow dispersion and a perforated stub out connection will be utilized to control runoff. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 TAB 5 (MINIMUM REQUIREMENT#5) • Minimum Requirement#5—On-site Stormwater Management Project thresholds that trigger Minimum Requirements#1 through #5, shall utilize the On-site Stormwater Management BMP's from List#1 for all surfaces within each type of surface in List#1; or, Demonstrate compliance with the LID Performance Standard. Projects selecting this option cannot use Rain Gardens. They may choose to use Bioretention BMP's as described in Chapter V-7 — Infiltration and Bioretention Treatment Facilities to achieve the LID Performance Standard. Refer to this section of the reference Manual for all Feasibility or Infeasibility Criteria for List#1 and List#2. Is this project Flow Control Exempt?Yes (See Appendix 1-E:Flow Control-Exempt Surface Water). If yes, provide reasoning from the applicability section of 1-2.5.7 Minimum Requirement#7: Flow Control). If No, then the project triggers Minimum Requirement#7 (1-2.5.7) and possibly Minimum Requirement#8 (1-2.5.8). The flow from this site has a direct discharge to Fidalgo Bay or a flow control exempt body of water. If the project is Flow Control Exempt, select from the list below (Skip List 1 and List 2). o BMP T5.13 Post Construction Soils Quality and Depth o BMP T5.10A: Downspout Full Infiltration, or; o BMP T5.10B Downspout Dispersion Systems, or; o BMP T5.10C: Perforated Stub-out Connections, or; o BMP T5.11 Concentrated Flow Dispersion, or; o BMP T5.12 Sheet Flow Dispersion All sites are required to utilize BMP T5.13— Post Construction Soil Quality and Depth. For each surface, consider the BMP's in the order listed for that type of surface. Use the first BMP that is considered feasible. No other on-site Stormwater Management BMP is necessary for that surface. Feasiblity shall be determined by evaluation against: 1. Design criteria, limitations and infeasiblity criteria identified for each BMP in this manual, and; 2. Competing needs criteria listed in Chapter V-5—On-site Stormwater Management. Lawn and Landscaped Area: • BMP T5.13: Post-Construction Soil Quality and Depth. (Attach Detail in Report) Refer to this site for requirements and specifications. All projects are required to utilize this BMP. http://www.soilsforsalmon.orq/pdf/Soil BMP Manual.pdf See Appendix 3 for the "Model Soil Management Plan for BMP T5.13"to be submitted with Drainage Report and Application Material. 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 Version Date: October 7, 2019 Previous Version Date: February 20, 2019 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 T5.10C: Perforated Stub-out Connections Roof downspouts will be collect to the northeast corner of the house and pass through the perforated stub-out prior to discharging to o BMP T5.12 Sheet Flow Dispersion The concrete apron on the north side of the property will be sloped to the east to disperse surface water onto the adjoining landscaping and grass. The gravel parking at the rear or south side of the site will also sheet onto the adjoining lawn. Version Date: October 7, 2019 Previous Version Date: February 20, 2019 1I1-3.1.3 Perforated Stub Out Connections (BMP T5.10C) A perforated stub out connection is a length of perforated pipe within a gravel filled trench that is placed between roof downspouts and a stub out to the local drainage sys- tem. Figure III-3.1.8 Perforated Stub-Out Connection (p.466)illustrates a perforated stub out connection.These systems are intended to provide some infiltration during drier months. During the wet winter months,they may provide little or no flow control. Applications & Limitations Perforated stub-outs are not appropriate when seasonal water table is less than one foot below trench bottom. In projects subject to 1-2.5.5 Minimum Requirement#5: On-site Stormwater Management (p.55), perforated stub-out connections may be used only when all other higher priority on-site stormwater management BMPs are not feasible, per the criteria for each of those BMPs. Select the location of the connection to allow a maximum amount of runoff to infiltrate into the ground (ideally a dry,relatively well drained, location).To facilitate maintenance, do not locate the perforated pipe portion of the system under impervious or heavily com- pacted (e.g.,driveways and parking areas)surfaces. Use the same setbacks as for infilt- ration trenches in IlI-3.1.1 Downspout Full Infiltration Systems(BMP T5.10A) (p.452). Have a licensed geologist, hydrogeologist,or engineering geologist evaluate potential runoff discharges towards landslide hazard areas. Do not place the perforated portion of the pipe on or above slopes greater than 20%or above erosion hazard areas without evaluation by a professional engineer with geotechnical expertise or qualified geologist and jurisdiction approval. For sites with septic systems,the perforated portion of the pipe must be downgradient of the drainfield primary and reserve areas. This requirement can be waived if site topo- graphy will clearly prohibit flows from intersecting the drainfield or where site conditions (soil permeability,distance between systems,etc.) indicate that this is unnecessary. Design Criteria Perforated stub out connections consist of at least 10 feet of perforated pipe per 5,000 square feet of roof area laid in a level,2 foot wide trench backfilled with washed drain rock. Extend the drain rock to a depth of at least 8 inches below the bottom of the pipe and cover the pipe. Lay the pipe level and cover the rock trench with filter fabric and 6 inches of fill (see Figure 1I1-3.1.8 Perforated Stub-Out Connection (p.466)). Runoff Model Representation Any flow reduction is variable and unpredictable. No computer modeling techniques are allowed that would predict any reduction in flow rates and volumes from the connected 2014 Stomiwater Management Manual for Western Washington Volume Ill-Chapter 3-Page 465 Version Date: October 7, 2019 Previous Version Date: February 20, 2019 area. Figure 111-3.1.8 Perforated Stub-Out Connection random fie �-.=�'�:;"=<;.<:y; k ;�=:�-.:�= � •ems.._ J l+`ti5' t •''Ft'r '.J�i^IG'V 1 'yJ i t _ filter fabric `• ;9ri*'y��Wrsr:'.1�,�14'�L1\.r`e�syrvti".".` . -.+chi-'�_. ..} � � c:t_• 1t3' min. 4 �l '��._ 4"perf pipe Opts►+ -arZrz � :*m 1 Y2"- ' washed rock 24"min. rw Trench X-Section slope w- to road all drainage system I 2'x 14' level trench w/perf pipe Plan View of Roof NOT TO SCALE SAM Figure ill-3.1 .$ Perforated Stub-Out Connection DEPARTMENT OF Revised December 2015 ECOLOGY Please see httpiAiiwmecy.wa.govicopyright.html for copyright notice including permissions, State of Washington limitation of liability.and disclaimer. 2014 Storniwater Management Manual for Western Washington Volume Ill- Chapter 3 - Page 466 Version Date: October 7, 2019 Previous Version Date: February 20, 2019 APPENDIX 1 —Survey performed by a Professional Land Surveyor _ _ 15TH STREET S 88°06'48'1 E 379,72' FND MON IN CASE EX. SIDEWALK I I FND PIPE 0_,89,92f 5 1 4 3 ` P 25.0t 1 i ► . CN . ON \ I La 1 T Q I I 3 I CO CA VI w a~ j 1 I H GARAGE '- + W - Lf7 FLUOR !MI CrN D °, I ELEV,=55 99' Lb Z I1 m 1 = 24.E nJ 1_ `�8 118° 1, 2 I I 1 + I CY) BL _ C < 128 0 V AD - P T - F CITY - T A \ A � - T - S I 1 1 1 1 I GRAPHIC SCALE 10 0 10 20 40 ( IN FEET ) 1 inch = 20 ft. HERRIGSTAD ENGINEERING & SURVEYING Topography and Boundary Survey 4320 WHISTLE LAKE ROAD 1504 M Avenue ANACORTES, WA 98221 299-8804 March 24, 2021 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. 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 Complete 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 this plan) 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/pages in this Plan) ❑ Product#1: ❑ Quantity: cu. yds. ❑ Test Results: % organic matter C:N ratio <25:1 (except mulch, or <35:1 for native plants) "stable" (yes/no) ❑ Product#2: ❑ Quantity: cu. yds. LI Test Results: % organic matter C:N ratio <25:1 (except mulch, or <35:1 for native plants) "stable" (yes/no) ❑ Product#3: ❑ Quantity: cu. yds. ❑ Test Results: % organic matter C:N ratio <25:1 (except mulch, or <35:1 for native plants) "stable" (yes/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 II Stormwater Permit 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. iii. 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 soil group 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, SP soils 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 ) : No 0 TOTAL POINTS 45 1 If no surface or groundwater enters site , give 0 points . • Ali``'' F� �u 1 li ...." L"' r am✓ I k* . Fes' I Q/// 0 Mae • 1 CD BHP TS - 23 POST-CcNSTRI c IOU .m•• SOU. OUAL,IT'I ANDy • �T DEI ti al ALL 1� DISTIMBED SOILS -.. L •---'"'4 _ e �.._ i , , . A' / / r' ',. / sr / 1.0 RICH vzslnILtrf FENCE ; US - Sr J r,o.: rj7 4/ .. r • CONSTRUCTION' LIMITS Y r d ! r fJ. ! r 1r r • Oa i ,• j Cr `�� eJ ..� I r i -� `* f r f 1r ...... --+ I1! � 'Jjf' 11 / L I � : E �y.lg., ^� _ ,h �r..At •-- _ : 4. 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