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WPO201800084 VSMP - SWPPP 2019-05-21
COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, North Wing 1 Charlottesville, Virginia 22902-4596 Tel. (434) 296-5832 • Fax (434) 972-4126 Stormwater Pollution Prevention Plan (SWPPP) For Construction Activities At: Project Name: Royal Fern Phase 2 WPO 201800084 Address: Country Green Rd Block 600, Charlottesville, VA 22902 Prepared by: Shimp Engineering P.C. 912 East High St. Charlottesville, VA 22902 Prepared for: Land Striker, LLC. 250 West Main St Ste. 201 Charlottesville, VA 22902 SWPPP Preparation Date: 1/22/2019 Revised: 5/21/2019 (This document is to be made publicly available according to 9VAC25-880-70, Part I1, section D) APPROVED by the Albemarle County Community Development Department Date 06/11/2019 File WP0201800084 Issued—10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County CONTENTS: (from Albemarle County Code Sec. 17405) 1. Registration statement 2. Notice of general permit coverage 3. Nature of activity 4. Erosion and Sediment Control Plan. 5. Stormwater Management Plan 6. Pollution Prevention Plan. 7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload allocation, and exceptional waters. 8. Qualified personnel 9. Signed Certification 10. Delegation of authority. 11. General permit copy 12. Inspection logs Issued—10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 1. Registration statement Issued—10/2014 Stonnwater Pollution Prevention Plan (SWPPP) Albemarle County Registration Statement General VPDES Permit for Discharges of Stormwater from Construction Activities (VAR10) (Please Type or Print All Information) 1. Construction Activity Operator. (General permit coverage will be Issued to this operator. The Ceri loatlon In Item #12 must be signed by the appropriate person associated with this operator.) Name: LefiJ Ss.;ker LLL Melling Zip: 7-29o7 Phone: Email address (If Indicate If DEQ may transmit general permit correspondence ekicboniceily: Yea ® No ❑ 2. Erdsting General Permit Reglatration Number (for renewals only): 9. Name and Location of the Construction Activity. Address Cm"• State: VA Zip: Z2f0) County (If not located within a City) b 1 Latitude (dedmel degrees): 31T• 00 663Z Longitude (decimal degrees): —79. 5'1 a t'79 Name and Location of all Off -she Support Activities to be covered under the general permit: Address (If available): City. State: Zip: County (If not located within a City): Latitude (decimal degrees): Longitude (decimal degrees): 4. Status of the Construction Activity (check only one): Federal ❑ State ❑ Public ❑ Private 5. Nature of the Construction Activity (e.g., commercial, industrial, residential, agricultural, oil and gas, etc.): 8. Name of the Receiving Water(*) and Hydrologic Unit Code (HUC): Name:_ Meorec C!k(C Name: HUC: 02 Of 02040H 07 HUC: T. If the discharge Is through a Municipal Separate Storm Sewer System (MS4), the name of the MS4 operator. 8. Estimated Project Start and Completion Date: Start Date (mrWddfyyyy): 10O�Q t/ ZOis, Completion Date (mm/ddtypyy):_ i%1/ Z019 8. Total Lend Area of Development (to the nearest one -hundredth acre): 1 S.0s, Estimated Area to be Disturbed (to the nearest one -hundredth acre): 1 Z. 70 10. Is the area to be disturbed part of a larger common plan of development or sale? Yes ❑ No to it. A stormwater pollution prevention plan (SWPPP) must be prepared In accordance with the requirements of the General VPDES Permit for Discharges of Stormwater from Construction Activities prior to submitting this Registration Statement By signing this Registration Statement the operator Is certifying that the SWPPP has been prepared. 12. Certification: 'I certify under penalty of law that I have read and understand this Registration Statement and that this document and all attachments were prepared In accordance with a system designed to assure that qualified personnel properly gathered and evaluated the Information submitted. Based an my Inquiry of the person or persona who menage the system or those persons directly responsible for gathering the Information, the Information submitted Is to the best of my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for submitting false Information Including the possibility of fine and Imprisonment for knows violations' n Printed Name: % i��,L J'�`^ 1�5:22VV' Title: ,1n•� Signature:n Date: 5�1�11 (Please sign In INK. This Certification must be signed by the appropriate person associated with the operator Identified In Item #'I.) 0712014 Page 1 of 1 Section 2. Notice of general permit coverage (This notice is to be posted near the main entrance according to 9VAC25-880-70, Part II, section C.) Issued—10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 3. Nature of activity THIS SITE IS 2 WOODED LOTS BORDERED BY 5TH STREET, WAHOO WAY, OLD LYNCHBURG RD, & THE REGION 10 FACILITY IN ALBEMARLE COUNTY BEING DEVELOPED INTO A RESIDENTIAL SUBDIVISION. THE DEVELPOMENT WILL CONTAIN SINGLE-FAMILY LOTS ON PARCEL 46A AND MULTIFAMILY LOTS ON PARCEL 54. THE TOTAL AREA OF DISTURBANCE IS 8.70 ACRES. Issued—10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 4. Erosion and Sediment Control Plan. Issued—10/2014 Stonnwater Pollution Prevention Plan (SWPPP) Albemarle County V5MP PLAN FOR LEGEND EXIST NEW DESCRIPTION rn 1- a Iy TC TOP OF CURB ELEVATION .e r 1Y SPOT ELEVATION r54W v I,, TOP OF WALL ELEVATION n: fir x IYew BOTTOM OF WALL ELEVATION BENCHMARK m STgiM SE'MR ROSE DRAIN m m YN£R UNE -rv- -n- WATER LINE GAS ONE OVERHEAD ELECTRIC MIRE a. ww UNDERGROUND ELECTRIC OVERHEAD TELEPHONE LINE -un- UNDERGROUND TE HME ONE EllL- � 1111 GRAN INLET (DI) O 0 STECRM/SANITARY MANHOLE C L PLUG iv WATER VALVE ME BOX ♦ f .& PRE HYDRANT as we WATER METER 1� 0-0 LURE POLE + t bill POLE PROPERTY ONE ---- ADJACENT PRWP UNE VACATED PROPERTY LINE BUILDING $£TRACK PARKING SETBACK --- - -- SANITARY EASEMENT - - -"'- SPACING EASEMENT .. DRAINAGE EASEMENT " UTILITY EASEMENT WATER EAffTAENT -.- ACCESS EASEMENT STORM DRAINAGE EABEMFM TREE LINE �- PENCE STREAM -,a- INTERVAL CONTOUR -_Ord -ad- INDEX CONTOUR _ -2 CG-2 STANDARD 6' CURS CO-6 COMBINATION 6' CORE & WIIER CONCRETE PAVEMENT / SIDEWALI( RIPRAP ASPHALT GROSS EC-2 MATTING EC-3 MATTING O VEEAND 10 PARKING COUNT CROSSWALK HANDICAP ACCESSBIE AISLE ® 00-13 HANDICAP PARKING NOTE! 1. THE SIZE OF THE SYMBOS MAY VARY FROM MAT IS SHOWN ROYAL FERN PHASE 2 WPO 201600064 TAX MAP 7G PARCEL 4GA * 54 5AMUEL MILLER MAG15TERIAL D15TRICT ALBEMARLE COUNTY, VIRGINIA VICINITY MAP SCALE: 1 1,o0oe IMAGE PROVIDED BY ALBEAINtIE COUNTY GIS SHEET INDEX C'I - COVER SHEET C2 - EXISTING CONDITIONS C3 - SITE LAYOUT C4 - UTILITY PLAN C5 - GRADING PLAN CIS - EROSION CONTROL NARRATIVE C7 - WET POND DRAINAGE MAP C8 - ESCP STAGE I -MASS GRADING C9 - ESCP STAGE I I - GENERAL CONSTRUCTION CIO - EROSION CONTROL DETAILS CI I - STORM SEWER PROFILES C 1 2 - EBS AND SWM DETAILS OWNER/DEVELOPER STEEP SLOPES ALL ONSET VANAUED SILLY ARE SHOWN, OWNER: GAMBR LLC & SNOW PAWS Li ET AS PO BOX 68" CHARLBTTES`ALLE. VA 22906 WATERSHED (i OPEN : 'NO STRIKER LC MOORES CREEK WAI RO''D 250 W MAIN ST STE. 201 CHARLOTTESMLLE, VA 22902 NOTE:. OEYELOPER IS RESPONSIBLE FOR LAND DISPORBANCE LAND USE SCHEDULE LEGAL wm'wEAC CS 4573 PG 270 TOTK 'Al An. .............. 9S A, OB 4431 PC 372 (OeeE of ExcM1on9e) AR IN LOSS ....................... 5.05 . CB E. PG.OBB (Oeetl of C' r 2O)) pitch IN RUW ............ ........ 0,75 M. OR A. PG 106-132 (Plot & SWM Pond) "do IN OPFN SPACE,.....,... 2" Ac. ZONING: R-2 RESIDENTIAL TOTAL IMPE(MWS AREA _...._ A0 A4 (42i OF ERE) SOURCE OF BOUNDARY $ TOPO TOTAL 1URP MFA ....... ...:......... - a90 AC (Sz]s OF ME) TOTAL BUFF A uARRA. .... ...... 4,90 AC (OO.Ox OF SUE) SOURCE OF BOUNDARY SURSE BOUNDARY INFORMATON COMPILED FROM DWU%D AREA 5..70 AC PLATS OF RECORD . ADJOINING PROPERTY """"""' LINES FROM ALBEMARLE COUNTY GIB DATA. SOURCE OF TOPOGRAPHY: 'EMI (2) FOOT CONTOUR INTERVAL BMP MAINTENANCE TOPOGRAPHY MOM LOUISA AERIAL PER DS 2168 PC Usti A PFRPEIDAL NON-DIW1EM1f SURVEYS, INC (08/22/07). SEEL➢ VERIFIED EASEMENT MR THE USE CE THE RUNS NIPS, OWNER IS BY SMMP ENGINEERING, P.C. (05/15/1B). SUBJECT TO ILL MAINTENANCE PROARIO15 R ENCEO SUPPLEMENTED WITH ADDITIONAL SURVEY TttRBN, BY ROGER w RAY & ASSOC (10/02/16) FLOOD ZONE WET POND AS BUILT TOPOGRAPHIC INFO PRONDEO BY ROME, LIP. AS -BUILT TOPO MCOROINC 10 THE PEAK M1WD INSJRANLE RAZE MAP, 6FEC1IVE DATE SHOWN PER FIFTH STREET PLACE STORMWATER fEB11UMY 4, 2W5 (CW4LWtt PANEL 51W]COZ69)), 1NI5 PROPERLY OOPS AS BUILT PLAN TEDGAIB 1COUDA US A$ -ODIC& NOT DE N1MIN TIE ME WE 103-111 RAOD PLAIN ASSOC. CONDUCTED BY ROOpAB05H, GALE, & ASSOC. BENCHMIFSEOO NAV096, NA LIPS VA STATE PLANE SOU1T1 GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS 1. The plan ....ring wlbonty mug be no46N one veeM pr'nr la IM pre-Wnairvalion ranlertrce, arc vak poor 1n tle Nmmenamnl M Mn tlNIWb'mg aeWily, a1q One raeM Ma Ed IM final inepi 2 NI erosion and ¢ePimmt [anbol mmeurn will M conffiucME oM "Writoirad orcordl to minimum ..do. and gecifterces of de Noll &KEEP oM Sagnmel GREW b ].9 aroaon elV ldi assert um�ml¢mmwrMR n5 m I are X Ad facee mil b 5r N.ree,A one. A. A e,P, of rod a Lai ttu'on dadd, saimem caatml We r th be mq'Main0 th to .tile of all 1im+s 5. Poor ia [Ommmcihr, Ian. JI¢Lw4ng oNnllee in ors olon Iran leiprMeJ m Ibew pkra (incptdng, bail not Ilmiletl to, o8-eile honor or Ma ormJ, 1M wnLalar shall aubmh ppWrollary he'r ggy. On to ne Omer far rANr and [ppwe by the .an epprovig oulborlty, fi. 1M ¢OVocler a rpIX.Ale !ar ImWllat'ch d any oEh0.1 <aim mind mnwum zkcenoq to p nor, Rani. am sa%men"Pon Mermi'm % Ue {Van opwin�wMarily, 7. A beluroad art. to tlrcin 10 operas! al Pherl mntml mmeum at Enron during land SS ng rtliol'me and during silo Eeeel.amenl ma, Long stabnrzWim ' Aereb. 0. No,, eevaWe, aperaow. woW i be pumpod into on approl 11dairq days . 9. The mn0abr Md. inepni as women [enlml ..i- FeroS[aI.Y and o8er each nuNf Vionga'ing rainfall son. Amy nrtvsmry wil or c4onup Is miiMnin IM elfachavaa of do ems,a, diner N9kp on. be Know immMi.hy. 10 All 511 modriol to be'diet firms an ape"" decal on-. oat. 11, All wash matenne .ball N tomen k an apprnM waste area. Earth NI all be Met materials only. Into W rooted, stump. wads, ml ord othar debt& 1z Bamw ac waste arse art to N raJalmed within 7 days of compil p r Zon�l Ordlnana s llm 5.1.28. 13 All ECM e.hrla6 At N hrLd, aM In mnlp11,; ...Nan 1I-.1 M Ibe. Ards, a1 Nbemmle. 14 Bormv, fill w duels ocllnty im IKng iNuetZ,,_type purer equal tshall N fimi1M Lo the hand of 79Mmw h 9:Wpm. 15, Bearer. If w waste acliMy NMI be asndshad in a M" n wW x that malmui s Metal suppi ar order to mmimze any earned to prz . "bar damage b adjacent Ions and inin aremrenta and dmnpe Many publ¢ NM beasue a Mom, ingth, az ada, 16. The handoper shell rmaNa Us 'SEE t0 hang"miaidi, . Ad. UP permanent Mmmwmw an"Whal C'efice rhea app5mde all .. can. mr _ dgairai by INe plan regeGess of IAA sole M mry log, OR, buEMimg a Mat p of few hapar, 17. Tempa.ry'laded Non shah N lemp.ry handing mtl makhirq, goods, k to N a115 Iaw/.am mtl 1 IM mmlM1, a1 Saplamfier Id February to..mist . 50/50 rah of Areal Awagmm "d Mal Knla Rye, As A IMrch and Add to copkl of Annual Rye, or May through August b comost of Congo labor Strom muP1i is In N oppliel at Baths/Khat ZbTo n ve weyeai to dMand b/ the Carty dmlm PROM, i,p .. I& Pw . Moallee ce ¢lot N fate ad Imti@er, annmmmt wars. and whil Agrkuhvtl grwk e Mal 6maeloal N appal at 9NM N/10o, incorporated Into two top 4-6 inches of .1. Robinson Mat be oppAM at IOWIN/rah and cave! of 0 10-20-10 nWient nit PomwrTt Se;i shall be ..pled al IBOIN/ttre and cannot 95S KmWcky ]1 PiTell "Wen And Al phrowndil Ryryrme or Kentucky ."a., Soon M. h h be d"U. al Bo./H.M. Alkmaliven an main, t0 .pprwM by I A County amian control mspctor. 19. Wilt-.. Al men un am to N Initial Anyway Ny after ii I radA-ryb dont or cgng to AmEKKAl men¢uyeas is to N Ethanol immetlahty. 50 tape am to be awl On fdA of the vest ¢taaga vdI- A Read witheMmm� l t MI ended was to be "Waadashan nawmory M. adibre o gatl Mond of grom, Ed Imes and dram" dykes rA'rM1 are a ffinat ^ aadowent to hall 1m' M'. mWt be [owed and rGgiretl immhaAlde. 20. NI lempmry em¢'rm End se9menl controlmealatme to N removed wiWn ]0 days al final Aye soANooy„ when rreasum. ore m ory, needed, subj¢I W oppmwl by IN County erosion mmml mpedlor. 21, LAB qon moll N rid A the owmr On not obtain a Permit within 1 "or of the data of oppmwl. (scher Pmlxlian Ordimmce ss4w 17-2MC.) 22 Per-ret regelaliw alto M IaMaee on all da-dad ands, rilAm nice (9) mwtra After NoraWe IAe Iwds aislWNng call wmmM d, (leader Pm1NUs.Nunn. eaB" 17-2071 GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS 1. NI darn Of wmlrwW fill to N within 0% of nmmum dry d"sto oM Ed of opfmum m Am zon d NI fll mobhl to be oppmM by o golxhhoal wgieer. A 9mtechni. mtiamr Is to N pram, %" Canhw4al 01 d"ms 2. P FXO far Pr b art " he webfpM still earnings,mmagerim, facilitip. 3. For Napmry'Mmst Pond An ea. wfch am by he ... b Pnmanml elarmMer mwogHeml lotigU.:..a, is wl la lake pane wW Bn Sot 'a andowaaM, ant pnnimon OR bma abinrro] Iran IN Ounly erp'm a. "Aiddor. GENERAL CONSTRUCTION NOTES I. No, to my wvaoRion QW, my ensurs, public N'bi AM,, down, ifider m to my Wia1n9 reµ a pmmiuihm l ffidl N obtained hen Mad Vagnio CryoNnmt of baimvlotion (MOT). "N" eon as Gam may notE.AA ly me N Us reOS-N bf in'' -It MFera any ad and Dear the «qW bI Us pmmh seal gorwn. 2. All mmt"al and wnl.ctim m.Mi Tdcl color. A .-I epxiiwlhna and atmMrN Of MOT Olen alhaxeLod l"Lod, Bad" ono stun. chi .strafes altll re pr. i. 1, oxrrddnre A. 1. "pmpl ew1" 1.1.10. and 9mll be k9hNd Por to an, rtcarm, 9rddng or aloe ...amPlin. 4. All slopes xA all ®nos art to be fetched, seeded and .doom. 5. Am mmimwn dfgable dope Is 2:1 (brrd-fis. nor.). *,a re'=.1.AtnMoblg bse depea M kl a r de, de to be vearoof 6. "'Al mi a MnbiliPtim mot fined ditch Only b¢ r,at. rAm'n Idea apniM of IAe Cwnly Fngi!' a dsgignre, it le tlepnetl ne<p90ry n IXtla 10 slwElp o droMgre (ATneL 7. All raft "U" an al aN Vw ll cwf- rM Iglbn All tat mi. Traffic Control Dedcea 0. Unless otherwise noted off ante pee chtll be reFMaetl mncsle an, - qon III. 9. All .,Pont. Ia untlergrauntl now NeJoXollw .Act as d, ON U A SWndanor kr Its CmeWchn, Iadsus'✓y (In SEE Pal 1916), THE Qp h� F 1 u M. P> T: N 183 5�411 I01 cat PchJE At, E ❑NE BEARING DISTANCE L1 E65'3000IN 89.04 L2 572W 0} W SJ 34 L3 S57'26 M W 51.57 L4 556.4fi 20'W 110.5} LS 589-4734'A 42.66 L6 N5fi' WDNE 25.00 L7 N875538'W 9L84 L6 556'4931'W 51.00 L9 N3310'29'1 31.31 L10 S02-1239-W $783 L11 683 236 W 116.5. L12 5063757E 25 D0 L13 5832203'IN [7.89 L14 N7831'14 E 3072 L15 N5315'}J E 23.02 LI6 N1625}]E 1}]J6 L1J N304958E 20 L18 N599956 W 3.62 UNE DELTA RADIUS ARC TANGENT CHORD CHORD BEAMING CI W0241" 1964.86 451.64 2 2.03 480.43 56920'20.W C2 2032 D6 50276 1.1 DID7 17. R' $445IRo,,w C3 W4038 52.46 04 3.40 204.66 37294 5583934 W C4 29 40 22 461.31 2026. 12]49 24649 N6147'46"W C5 W150C 578.08 143.79 72.27 143.42 N8550'49"E C6 257326- 119D5 52.98 2U.3 52.55 N8596'00"E C7 15'5 W 553087 150.00 75.49 14452 7451929E C0 16'5224" 4D104 13250. 6UIIR 131.51 42749-M-E C9 39193 304410 160.47 80.25 160.45 N193949E co. 10732" 525 DD 10.31 D.I. 10.31 N307612"E CT 73122 200.00 26.26 13.15 26.24 57614YE C12 2fi'IT51" ..I 62 275.26 I.Ro. 27266. 50246'46"E C13 X2802 3044.10 24.82 1241 24.82 N214 27'E C14 O'5342 304410 47.55 23,75 47.55 N2225'19E LEGEND ' �- ��� SOIL TYPE BOUNDARY --- 1\ (NOTE: 1 SOILS U.0) ' 11 OVERLAND FLOW DIRECTION 4,o K>877 4� ; I TM 7y 46F PORAON REGIQN TEN CO C i � 03 3 \ / / UBJ22- 16 FIAT .�4�'-r-1 \ / ' // / 34C _- 1 ��_� �I Imo. . . �.�.�r�.� 1 •w-� _ A,. /1 m"/' / -DOLLNTRP PEEN RD • I_ _ / MANAGED ROPES ( ) _ i� AlN YrR _ - 44q - /I IIr MaxA® sceEs f1w _ i ------------------- Iw > ': PPE _ ,,p / •ri O 1 � `'%/,.`�\. _ °/ srv'gzo,'A�A/ 16(fi' � r _ /1 `-r 16 �.�z►� \ 1 m � (3 %_ � � � ;- -_ I -« o- I ' 11A r I I 1 /' 1yk'l _ •�►.1 N s � � � `I,MJ6 �b7C -_`_` v� v r AaG'I 1 ! r I A"N'>Q4 �' PORTigN �:>.,� 1„•.'�_ 5:Ej', RC�RES'. `. `_,, 7 , r �r as vgp-- .� `� - I o - E ` / f .i..s�..n► Ili I D I L6_ i.� o'B.zis® \ TNR41 109pLAT D7B�112EaC 6, d, 43`hP\A\_ 1 l ' 4 To TOP 4E8.9J NY♦417.1] ` ! _ / ,1 '4 m S I.0 n ,j 00�00 1MOOL)ERI r'r , en nn /�. MR T �\ I q I. •_ - ___�_ \\\ `� \ - ___ � �\` .� _y,_ f" 'vim. I I ,.�4� �� novenae A ` A 27C'\ T` �' �.1�' PM 76 52F >M / \ I Ili � As. / 1 11I ( 1 I ,0. `' , ;' _ / - os$5733 270 r�I. L.? 'c, ,:'; -0.8.4431-372 1 r I n A �% I 424`3 I _ D$4369 '496 4 11 iif J _ �� 'ice♦ 1PoBT1&04"� / /,�♦ 501 & 502 PLAT < ! z{T \ '�_; '"i > �i� _ _1 11 // ♦ljp '- x°RO Ito' \ 1 Nzs 7Ms t. - I y - a� ]'°1-4.i f MAuaGLn �♦�j �M 16R' _ sLePE6� - _ __ i ) Ii _ - - ,♦ / ' / / bi I /Iuv-y29 as _1=' !__ - _ _ _, _ lY {r _� "...'/f- - PnTu=�` _- --• �, . .< .-_x.. X_ �I' 11 a _` l �47 NU ' -aace - 1 III \ R` a%vuT - _ j Fri 1 'vFd1 Elm � I� Iya� 4b� ♦ , W/AORNL 'M1' / /� E ROUTE E i 5TIj� / VARIp8.1 WI-3�4,f1 W ai- +R Artn. PATx HWY.P.R. XI-257 /n RU 262 4uo] wv.59T= ' // / �_ W_� ln/ �D�}�\�5D$'yJyPina��� ��`"�( i32 _-' ♦_ _= .< \ `\��� `- � �` \��� IW� U FVI 44 QD r� ____ v a n iTH Qp y*� M. P> 1: N 4 183 �, `` S�ZIfiI�pc54.• F-S•YMUL \ . Y OVA 139 358 1 o E THRU 109 PLAT oar_ A� w far 4 NQ r/ Z w o U W 0 � O m > � Q Short No. C2 FIe NP r A LOT 19 / +*+/+ ME .� +/ + / Q + -- w / :o WT 119 LOT 11 \ i I � \ av W Iw1 PENSPAUG l u°mua m lQr 2F / ��1. _.- o IDT 24 I lOT 21 LOT 22 � � / S L95 .j �Ur ®sill �N SWEA IXT ___ __________ -------- --- —_— ---- --_ b. R ___ O Ty ,�, y M. oe S�183 N L'..♦ Zi�iot ms e NWP r - 2 01MP ]8 i i54R1 1 89W1]] %1 I S W No. C3 Fi. No. Cl F-4 OPEN SPACE G III XN 10 TX LOT 19 L �N( 4j;83 OPEN SPACE F LOT 17 LOT 16 IOiB \ \` ���" / �/ TOLL 11 GRADING G IIIAN.,GN I LOT 12 INST I 2Q1801"T' OPEN ILA vbuc H 10 _7Z LU - - - - - - - - - - - - - - - - - - - - - - - - - - -mn — — — — — — — 5 �EF` EXT. — — — — — — — — — — — — — — — — — — — — — — — — — — — — — Vo, — — — — — - oor IL IL w too, i.j /0 1 Z201 8 sole 40, Shiot No. 40 a 40 Ba 120 C4 OF 12 S.�,, i'�LO' 18.004 )II it I ;�...Oy//�•\\\ '// - ` ✓ / `T_` U _ /, _ i __ __ i __ _= iI_ -'ELF' Q 1 1' ' it � / ` f'ii'I� '\.•�/" / _i - /'/ I \,` ` � �_ - - r;l�1r w � avIX,FACE r ` 1, III 117 ri r r / r , Ny 183 ex ¢o _ _ _ /WT17 1 / ,'LOT 32 -Y �' � � 3I f 9 / �'i \' 1 '•Vo /.4�f9. / .I -9Pt P A IDT 11 P �. _- - '� [e J• `r/ % I ! a 2 � iA� D-sN 1 1 vs einl �� y z � , y xsr z zymoomoro ___ � \\V I � � --PFFi' se ��"'i�' � I �- � ,-�v � � �� A�ur,�'- �.:�rv. }fir it „ ,.�" 1 a1 �� .PAv I y •• � ,- _-ti � mm_ ` III I _ - OPEN SPATE' i' i I li-w r it llN u II 1 10V - a I I 1 i I - - w 1' W _ m z u ' — --i--- IL d � � - � / ;' cam\ �` 'i ♦\.�\\```; ome / - _ '� ii O1 2018 _ \ / _ - l 1"=40' -_ _______ CS OF 12 � -� --- Fle No. Bede: i`�o' 18.004 PROJECT DESCRIPTION, GENERAL NOTES, EROSION & SEDIMENT CONTROL NOTES, AND SEQUENCE OF CONSTRUCTION WET POND ORIGINAL DRAINAGE AREA MAP �' leFllflFe e} q lisic F] � t !!t'91!tll' avwvaarx�vwvaaanmvamenaa}.va g I i E1 F , i • II I 4 ,l FEA, ■ M O p0 eda S d� V e1 V O�e i as ax V i ip tcy lekj O rU ffi agar-1 CS to VIC N b 0 Z n 11 rv% `O o A.us 0 � g ¢ ' of o a ...... F 1 pM1 � a /M An t I I It e4 04 e T PROJECT D6CRPPDN MI5 S'TE IS 2 Y ED LOTS BORDERED BY SM STREET, WAH00 WAY, CEO L"OHEURG BE, k ME ORLON 10 FACWtt IN ALB&ARIE MINDY BONG CEL9CFID HE A RSIDENTHAL SUBMISFOl ME ITSMOMENT MI CWTVN 9N61E-rMtY LOTS ON PACEL KA MO M nFMLY LOTS ON PARCEL 54, ME TOTAL AREA BE DISMNBANCE IS try) ACRES. ME PROJECT NWLNS ME FCLLOMNG NCRK ACIAll 1, ME CONITAUM SHALL COLUMN ALL LOCAL MO STATE EROSION AND SECHENT PEId11TONG REWffl F s MO MAINTAIN ALL ERfSW MD SE NT C TOTS IN ACCORDANCE NEW ONE PERMIT REWREM M 2. INSTALLW ATOf PERMANENTEROSION NO SEDIMENT CONTROL MEASURE AS SHOO ON ME PLAN AND DETAILS N 3. MAN , MO %AEEMENT OF TILL SHALL BE IN GENFILLL A WANM WITH ME PLAN. A. EEtABUSHMFNT BE PERMMfNT STABN2ATOY OF ALL DISCLOSED AREAS F ECUMA GUE CONCERNS ME EXISTING SIZE IS VACANT MW LOTS RVED R-2 k R-10, ADJACENT PAOFFIITES MIS PRWBR IS BMN ME NORM, EAST. 09 SWAN BY EXISTING SIf6FT5, TO ME NEST AND WSINEAM OF RE PRPBMER OR LIFE 'W£ TO-DEHIEW.. SOIL MAY NEED TO MEIMPMM TO ME ATE FRO/ ALES MACH SHALL HAVE ROBOT CON1R[4 PENYITS M�E59TE CONTAINS THE FOLLGNWG SOL Trit 270 - MOAK LOAM - 2 TO ]F SLOIR, DEC E 2]c - MOAK LOAM - ] TO in SUCER. FAC B, 27D - MOAK LOAM - 15 TO 25% SLOPES ROD B. J4C - GIENELG LOU - 15 To RED ROPES, NO O ME - HART LOAN - 15 TO 25. %m H10 ORLON AREAS NO(AITCAL AREAS HAW BEER NMT T "IN ME SIZE mom An SEDIMENT CWTRdS 1. SBEES NNNSE: A PROTECTIVE BM INSTpUID V MORBIli ONCEgMB1E UY T AN EAGRON CgI1 MEASURE DID ME SPEC, 3.01. 2, CONS CAN ENTRANCE: INSTALL AND MAINTAIN A CONSTRUCTION ENIRMCF. AS NECESSARY, CCNSNtU% MAIHRNY.NF ME FCLLONT'G CONSTRUCTION NA NTEHANCE PRADIUS SHALL BE TOUCHED AT ME SIZE. I. ALL Ek5 CONTROL MEASURE WELL BE W OM DALY AhT AT FACE9CMFICAM MIN WT. P CCFlCkNCYS IDENTIFIED WRING THESE INS`ECROND SHALL & CW,RECRD AS ISBN AS PAACTCABIE, 2 ME WT FENCE BARRIER SHALL BE xVOLF-d LY CHEF FOR UNDERMNNG CETE MAPW PA 9GMRCANT FAD" MOMENT SHALL BE RENOH➢ AFTER EACH OLDER EVENT AND MOM! ME COME. OF SEDIMENT DEPoAIIgi REACHES HALF THE ROM OF ME CM70L 3, ME CONTRACTOR IS RESPW9ME FEE ADHERING TO ALL MAINTENANCE REQUIREMENTS SET EMT IN ME CURRENT WITH of THE NRTJxIA SEDIMENT Alp RMIM CONTROL MAxuu OWN AD SEED D LIWMWMELLBE Cf NRGINU REGULATORS TO AND SU MEAT A GO D STAND OF G( 4 ALL SEEDER AREAS MLL BE REGULARLY [XfCRFD LD fNAIRF MAT A CWJ STAND Ci GRASS IS MAINTAINED, S. AREAS MIN RIP -RAP 41WN BE REGULARLY ONCE SLED TO DETERMINE V WGM ROWS HAVE DAMAGED THEY CORDANC OR LPIMEO ECCE59\ETS OF GAS ALL AREAS SHALL BE MMNTMNfO IN ACCORDANCE MT ME FEWIAfYEN15 0.r MIS Ek5 CONTROL PLAN, E1ld'RNMFNTAL WNIROLS L CWMACTM SHALL PROMOE ANC MAINTAIN ALL MMRNMMTAL CWMR MEASURES s0 As. TO COMPLY BUT LOCAL MaNANCFS STATE AND FEIYRAL UWS AND REWIATWS WRICAS£ TO ,i POLI1TW ONWATAN OF ME STATE ANC IN INTERSTATE WAIINS 2. CCNMACICR SHALL MINIMIZE ME POTENTIAL FOR ARM POLLUTION BY ME OR OF FMISAW CONTROL EQUIPMENT W CONTRACTOR OPERATED EQUIPMENT, SHUT -DOWN BE MOTORCED EMPNEXT ON NOT N USE, AND ACTIW.Y CWTT IM MST WISSWS MRWOIWT ME PROMOTE ERNN E YT UENT cWIPOL PEldl mxG CO"ACM SHALL BE YSPW519E FOR OBTAMING ALL LOCAL AND STATE ROSIN ABU YOWFNi IXN1AQ PfRMITS AND MAINTAINING ALL EROSION PNO YD116N1 CWITiCC51N ACCORDANCE MT ME RTMIi M%MiMENT . RUNOFF NOTES 1. THAT MEETS ME REWIMIENTS BE SN AND SPEC. 302 AND CONFORMS MM THE 2 REWMFYENTS BE WE EA05N k. "VENT CONTROL P.M. 3, FENCEStir INSTALL AND MAINTAINMAINTAINSET EMU MAT MEETS ME REWREMfNS O 510. AND OPEC PEC33,05. MIS TILT FENCE SHALL BE INSTALLED AS SHOO N THE fROSKKV k LT -SEDIMENT CDNCET PLAN MO ACCOMPANYING M HS FOR ME PURPOSE OF IFRALL HE JN SLT-LADPU y NUNOFF BEFWEli 6 EI MNn' D MN HE UF SIZE. ME SILT EFNH SHpLL BE INgEC1E0 AND 4 MOMTANEO SE ENFUAE AP A SO PEANRNAXCE, 1. EEY0.WARY SE11N A E A SMALL DING ARE GE SO BY E DETAIN SE EN EMMFN POND q RUNOFF MM A STALE W AR ACROSS MA DRAINAGE SwME, N DETAIN A WE Di -LINEN S RONOFT )M O OUT AMI G ENWIN TIME TO AFST) MOST CA ME 915PEXDEO SOUDS NI YTTf CUT. MAWMW EfRCIIVE UPS LS 10 NNMs. SN ATH SPEC. 3.13. IC BE CONWRRO INTO A PERMANENT REGION POND AT ME NO O' CNSTRUCNCN AS CfiAILF➢. B S TEMPORARY MYERSN OME A TINGE OF COMPACTED SOIL 0]NSMX ED AT ME TCP ON BASE OF A GROPING OISNRWD AREA MUCH NE YMMENT-U M ALI TO A SEGMENT ] TRAPPING SMJCNAE MAMMON ERECTVE IEEE IS 18 MONTHS. ST), AND SPEC 3.09. ME CLEMw TFR ONRSCNS MLL BE MACE STABLE BY ME USE OF MOT LO-268 DESIGN B RFYIACMIEM ON MPMR OF DAMAGED STRUCTURES vlrLL K AT ME CONTACTN'S EXPEN ME CONTRACTOR 941E Y RESPONSES ON PROTONS ALL SWUNG Off STRUCTURES ROM DAMAGE AM CONOINATNG MNK SO MAT ME OMNER CAN MAKE NECEAMY MRANGEMMM TO MONEY OIECT EXISTING STRUCTURES FROM 'MAUS ME CONTRACTOR SHALL R EEYONT E AN NOTIFYING ALL UTUTY DOME ADJACENT LAND GOING WAOU MC W MAY GO IMPACTED AM M1E MNGINIA DEPARTMENT OF MANSPWTAMN PPoN TO CWPUll MY WE-9E M. CONTRACTOR SHALL NOTED AND CLCRONAT ALL NCRK MYCIMNG EXISTING Uw11Es MM UTUtt OTHERS. B AT LEAST ]2 HORS PRIM TO THE START 7 WNSTRI ON ALL EXCAVATOR IN UHMWND PIPENSTALIFflN MUST COMPLY MT OSHA STANDARDS FOR. G 1NPgURY RFUNC UWMMY s LNG 91Au MPUEG ALL IXNUOET MEAN NNon a SFLATDENUDED MAY N MAY NOT BE AL FlNAL LAAO BUT M1 GEMELN OR SHAL CNOTWS R T E APPROVAL L 7M E O 10 ME GMIU AND DID SP REMAIN DMMT MEDIISNRKIN FOR LNOA MM 14 GAYS. HEM MY SEEDING SHALL BE 9. CONTRACTOR U SHALL AIBNIi PLANS. THE MLUDE S O DR OWN W91RIA15 OF ALL RCATIEG ONG APPLIED N CONFORMANCE MM SLID. MO SPEC. 131. ANDF LS USIEG E ME PUNS TO INCERS AP SHOP oOF SUER LAMES N SEE SHEPR 0 "a MO RffifW HE REPORTS ME O THE APPROVM OF 9BE A 5 MLL R GE MG MLL ]. ANENT SON PERMANENT SER MA GRACE EI MEACH T] NAREASMY GCESCON OF THEY AL nERAL [tTM NOT RFUE\E Mf CWTiACHM iRpH THE flESHUNSBRItt [f AOttREHFf N ME WXIRACT A10 PERMS MMIN VEAL ] GAYS AFTER REAL CRAOE IS REACHED ON MT PNT O O ME 91E. PERMANENT PEEONG Ei4HUZU T READUC "AS AND DAMAGED ME BEAUTY Ci ME 9TE FOR MY EARCR MAi MAY EXIST. G, APPU—C-TON W PUNTnf550FE5I OWN WIor 1AaA U THE SOit ID. CONTRA AND STALL BE Af5 MIND I iH OBTAINING ALL NECESSARY STATES. INSPECTIONS. WS, �� � �• �� � wee BONW,.DIG OTK.A PBAIEG IlBls N ACLYMGAYCE MM LOCd AM STALE PWCY. 9, 10 T. W SHALL BF REMOVED RMANENT STABNZATON AND 4fNEENCE OF CONSTRU WE FOLLONiNG ARE WE PROPOSED MANAC£MENT STRATEGIES AND DETAILED SEQUENCE OF CONSIRUCTON: RAGE I I, INSTALL CONSIRUCRON ENTRANCE OFF OLD LYNCHBURG ROAD. TRUCKS SHALL BE CLEANED PRIOR TO LEAVING SUM 2. INSTALL SILT FENCE DIVERSIONS SEDIMENT SEASON 1 ABC !SEDIMENT TRAP 3, STAGE2 CONTACT THE ENGINEER AND ALL ENABLE COUNTY FOR INSPECTION AND APPROVAL OF ALL E&5 CONTROL MEASURES, STAGE 3 1- UPON ARM OVAL OF CAN CONTROL MEASURES, BEGIN SITE WORK. 2, INSTALL UDLI DES AND COMPLETE MASS GRADING. PUBLIC ROAD SHOULD BE WADED FIRST BRING ROAD TO GRADE AS SHOWN ON SHEET C8, PRIVATE ROAD B SHALL ACT AS AH EXTENSION OF THE SEDIMENT BASIN, MAINTAIN SEDIMENT TRAPS AND BREW UNTL UPSTREAM GRADING IS COMPLETE. MAP SHOULD BE REMOVED FIRST AFTER UPSTREAM AREA IS STABN2ED. SEDIMENT BASIN SHOULD REMAIN UNTIL TOWNHOMES ARE BUILT AND MENTION PIPE IS INSTALLED, 3. INSTALL ADDITIONAL CONTROL MEASURES AS SHOWN ON SHEET C9. 4, MAINTAIN PERIMETER CONTROLS UNTIL ROAD CONSTRUCTION IS COMP1E AND SIZE HAS ACHIEVED TEMPORARY STABILIZATION. AGE 4 1. AS AREAS ARE BROUGHT TO GRADE, APPLY MULCHING, MMP�ARY SEEDING AND SUMPAC SEG. 2, ESTABLISH AND MAINTAIN PERMANENT STA&LIZATON, INCLUDING VEGETATION OF ALL SLOPES AND GRASSED AREAS, U WHEN SITE HAD REACHED STABILIZATION, REMOVE PERIMETER CONIRNS. 1. PER DO 2168 PG 106-122 A PFRPENAL NON-EXCULSIVE EASEMENT FOR ME UK OF ME WET POND ON TARP. 76-54A1 EXISTS. ALL CONCENTRATED NEEDS RUNOFF SHALL BE ROUTED INTO MANMApE CHANNELS WHICH OUTLET INTO THIS WET POND WHICH WAS APPROVED W11H SOP 200100129 AND EXPANDED M11H WP0 201500096. 2, THE CHANNELS INTO WHICH RUNOFF FROM THE ROYAL FERN PHASE 2 DEVELOPMENT WILL OUTLET WERE RESIGNER FOR A FULLY BUILT OUT SIR PER PAGES 6 Ar 14-16 OF THE SWAN CALCULATION PACKET FROM SDP XMISODS. THE POST-DEV DRAINAGE AREA MAP FROM MIS SITE PLAN IS INCWOM ON THIS SHEET, 3, WE WET POND IS CURRENTLY DESIGNED TO MEAT A TOTAL DRAINAGE AREA BE J2 72 ACRES MAND 63% IMPERVIOUS LAND COVER. PER SVM CALCULATION PACKET FOR SDP 2001000129, THE ROYAL FERN PHASE 2 OEVOLOPMENT (LISTED AS ME HEISCHMAN WESTERN RESIDUE) WAS ASSUMED TO HAVE AN 80% IMPERVIOUS AREA FOR WATER QUANTITY VOLUME. THE ROYAL FERN PHASE 2 DEVELOPMENT HAS 42,7% IMPERVIOUS AREA SO THE WATER QUANTITY TREATMENT IS FULLY COVERED BY THE WET POND ON IMP 26-54AL REFER TO PAGES 1-21 OF THE SNM CALCULATION PACKET MOM SOP 200100129 FOR ORIGINAL DESIGN CALCULATIONS FINE WE POND. REFER TO SHEETS SWM-1 FROM WHO 201500094 FOR REVISED POND QUANTITY/OUALIW DESIGN. REFER TO SWAN-] THRU SWM-10 FROM AEG 2SOOLL 94 FOR RENEED POND DRAINAGE AREAS, 4, THE AS -BUILT WET POND HAS BEEN CONSTRUCTED PER APPROVED DESIGN FROM WET 20150W94. AS -BUILT WET PCNO INFO IS SHOWN ON SHEET CZ. REFER TO "FIFTH STREET PLACE S70RMWAMR AS -BUILT" DATED 11/20/2018. M N MUM STANOAROS EMS)' All opPllcoble Vol Issei one Sediment ... If Regulations and Minimum Mail AN b tooll be ethos. to the f all ,hoes Of ronetructim. These Inalutla, but ore net limi<etl 10 to following: I. STABIUZAPON OF DENUDER AREAS: Permanent cr tanpmary soil tlobihmllan shall be Span.. to bare a 'Rine s n do, after finaPortion l grade Is .ached o any of the ea. Ai\e. Temporary soil Ammizo\ion mppliea moll he owittye a e e do, to denoted t That may not be at "'s q.aae, net will r napmnl o enaielui far net .... 14 days. Permanent stoblllzoBan shall be Passed t U t t d I H domain 1 than I - oPp ys 2 STABILIZATION OF SOIL STOCKPILES' Daring construction of the pro,rat stockpiles Mail b ! bit a or protected with d' t t pp 9 The MIFEWit A immiscibly for temporary Protection and permanent t b'I' N f AT mil Lt.,H,1.A on site As well oe 50l In lent. ally lronapartetl ham to Pr oKcl site. 3.PERMANENT VEGETATIVE COVER A permanent vegetative o r moll he established on removed areas not .twVwite pem,m Mtly Am l'[ea. Permanent vegetation shall not be nsirro ed established until o ground cover s oUbve tot, In the opinion 01 he county Inspector, is uniform and motors enough to survive to inhibit 4.TMING k STABILIZATION OF SILT MAPPING MEASURES: Sediment basins and lope, paimeM dikes, vetllment homers And other measures intended to trap sediment All be wnstrudedoe a first step In on, land aiclIding octiNty ontl ..It De made ten ctlond all— .,atop. .and dis Wrbance takes piece. 5.STAGILIZATON OF EARTHEN STRUCTURES: Stahl' t' a a h II be opplN to rth structures such os dame dikesd d' Mr mealo\dy otter hall 6.5EDI VENT MAPS AND BASINS: A seament man moll control surface runoff Andre disturbed arms tat Is mcomposed of Row from drainage areas Smashthanequal to Three o e ea ment been snag be enough. Ind A.t otea to occomtroadi the an LO Pates seament leading for the ona Sal N g \ ty. The arson tlence or sp tend advice shall take into a ou l theHard drainage arm. Flowing through the disturbed area M be served by the basin. Z.CUT AND FELL SLOPES: Col ontl Ru III shell he eesimen Ana dovlm ode 1, o er Met wlu m ro too. gapes that c. Ind m be mile ...�Ively within doe year of permanent stam0zotiton shall be provided wih additional ,lope aOkollifing measures Unf11 the prWlem Is ....Cted. B.CONCEMRATEL RUN OFF DOYM CUT OR FILL SUES Coardion t tlt d runoff eh r t flowtl cut An fill Mo es unless.containe d within q te am tlp t manel woe m .m stmd 9 WATER SEEPS FROM A SCOPE FACE. whommor strairseeps from I V.Nsc (PA., otlegU ale drainage ar o\h Br pmmmon toot be promeetl. IO.STORM SEWER INLET PROTECTON All alarm , r met, that are made amot during comb.etwe shag be protected se that tedlmmt-item wotn cannot enter mvsyo e cA nc, system without first being Tltmed or otherwise treated to remove sediment. ILSTABILIZATION OF OURETS Bar to newly can booted stermdater conusyo channels a made pnalmm adequate outlet protection and l e temporary o ermanent channel lining shall be Installed In both a conve,ence .Fennel and rac!,in, chiend 12WORK IN LIVE WATERCOURSES Who work I a\performed,rosoutans shall ti taken v to . n nt t du t on,lm r\ and slob.. tll work area t m I t t limbet p. SI during or cousellon d C ff 'd I. meter MCI e e d Ih construction df f armored and su e e dean o' y b d f a structures f armored by nneraabve r m te. m, U.CROSSING A OK WATERCOURSE. When t t be crossed by construction simme more than Mirs 1, In, month P ad 1 bT Y libround, constructed 1 edml l 1 MAN D provided. 14.APPLICABLE REGULATNiS All applicable federal sole and III regulations pertoaing to we Tg in ar annedin, It. wmnco.rses shill be reel 115TABILIZATION OF BED AND BANKS The bad and banks of a o'qrFFum.AMR Do st bl ed marrial enter work In One wotncau ne' I P t tl IKUNDER ITOUND UTELIMES Underground tubes OLD be i..Ild 1, eaccrikestaswith the fdlowng om stain cdun lo.mler showl.: a:Nd, more than 500 linear feet of tooth may be opened at me time. D.Ezcovoted makrlol shall be placed an theul side of trenches e EMuen! for aevoterng opeotlons shall be filtered or passed through pprw2d setlment trapping deuce or bola a a h got In o a nw tot does not odverselY affect Lowing aremens or offaiteproperty. d,Matenal used for bockfM ng trenches shall be Properly compacted in order to minimize erosion and promote stabilized- e.Ratob9icDC, shall be omomp.tshed In accordance with these regulations. I. Applicable safety mgul.tiL,I shell be. complied w'an. V.CONSWUCTON ACCESS ROOMS: Where Construction wall ale access —to. Adevi paved pubic roads mardents rall he made to munimind Me of sediment Imek:n0 oLTOAt -,far.. YM ere aedmenTV transport onb.voa color public road surface the reed shall be cleaned thoroughly of the end of such day. Sediment shall be removed by shoveling or sweeping and Iran.... mnt Red to A seaea nt of dell A Street washing shod be .110wed only afln seaimenl Is m -rd in Ems am mend, Tn is pmvlsion anon meud sm, la mo.late os MAN ad e to larger land disturbing oaumces. I8.11MPORARY WAS CONTROL MEASURE REMOVAL: All temp .,any erosion and sediment con4d memorms. stroll be removed within 30 days alter find site stabilization or After temporary measures are o longer needed. unless oterwise cohorlmd by the I ... I program au Nan y. Trooped sediment antl the disturbed s 4 o ,-,Ue9 from to dDpositlon of temp omry mmaures shall ad ,once eddy slabilluL to prevent. further erosion And sediment 19. ADEQUACY OF RECEIVING CHANNELS: I .... fles and Waterwoys downstream from Me dewbpment site shall be ,,,sated from sediment deposit!... a and damage,. due to Increases Vinciantl peak flaw roles of ,lormwoter ouni far the stated .Dastard, storm of 24-hour aurotlon. --_ ---- _ - ;-�__r __r,_ L_ ______----- �I Q _ - `________' _ r� i d _ - no __ _ __ __ _ __ __ _ - - - ------------ O \`IF %� r aZUATF IIif IH ��`\ __ l,..f t.J`•, `�'`� —�\`\ —__� lAI .x.-III I rii ,// =' =`'`� `nr.c ��y\`\ �\ ;; - __ NT � i I5' 0 1: NMi 183 s(alfiDA\ e>Ai qE0°0<d4 `�� / its WETPOND B �i O0` O6 - / I :\ESAL REFERENCE. oe Sze Pa +fis BB BOB. PB �I u c'V S II / I u SB nfie S e9,r°s PUT, SB v4B Pc +z4 IOW �y MET PDRD wANn vwuME ¢P � � yRs �'XlJR' y,fwr fg r H _ T. aee Ot / I -------------- DOW i i i nA9. �l I / \\ ;\ Y _ i i / aD ry / , 3 _ 4 �4 _ — _ _ _ - cc Lu / _— - _ _ ____ - _ �\�+\++. - jam_} __ __ WET POND NOTES IL W TIE WET ROME PESCH THAT INCLUDES TREATMENT FOR ME 11 O I1'r 11 ]6E 46A k ]6-54 PROPERTIES w APPROVED WIM SW lY 200100+29 ANO CIPANOEO WM NPO 20150009k N 1 THE wET POND wX1 CXSB ur OE9LNEO MiHH 91 E..NAAY0 / N J� TO TREAT ST 26 ACRES O CM -BB AND ASSUMED THIS PAEA P�AI HAD E LAND COVER Of 63S IMPERMWS THE ROYAL FERN PHAs z ELF .1 INIT.. ➢ IN THIS ANDA. MPo 2D+s000s4 ADDED Iz46 AS, DxaxncE AREA FROM THE Dole SHNXI AT ARREATTTO iz.]z nc o cnalee Twoo zo'S"Tsa°sn°m 11 O1 2018 THE REMSIgHS TO THE POND TO ACCOMMODATE THIS EXTRA SC0¢ AREA. THIS DTHERAINAGE AREA LISTED IN WPO 20+E0D094 STILL THE INCLUDES IX9(N AS4YFHCl FOR THEAL FERN PHASE 2SITE AND DID PHASE R BIE NOT CHAX(£ 40 0 40 BO 120 1 =sQA THE POND AS -BUILT INES. AS TAKEN FROM THE 9NM AS -BUILT SAME No, scale: 1"=40' FOR WO 201SBD094. IS SHOWN HERE ACCWOwG TO THIS C7 OF 1 2 AS BULL, THE PdIO BAD CMSTRUCTm MiTHIx THE.0EST0N PARAMETERS APPROKO IN THE AFRO 2Ois000Ra. THE POND Fil¢ N0, REMAINS ASE OATS TOOTREAT AND CONTROL THE RUNOFF FORIS. IT 1 8.004 WET POND REQUIREMENTS mazw+oB+z6 mozDTsx94 Torn^REOuwED curzRErvT POND �M. AS-d11LT PEOUIREMENIS RENAON W02o150 oa4 OBAINA¢ BO.RB AC O ADDED v}4fi MAX ]z.]2 AL O ]1.03 AC O AREA (Mm09 4L O L =O6 LN=00 LN=]0 Fa+Esnv Sze cr nooniaw ]oz cr nA c w�uuE atRO cY 50¢0 cv S ¢B cT ADgTON NORMAL WP1EH 3%'OD J9fi.50 305.]6 AS-BUILi 395.]0 EVEL PROPOSED pMFNOD➢ EMBANI(MENT %B'p 40dZ0 JOT63. A5-BUILi s0403 TOP PROPOSm AMENDED O LOWESi ° m m 4Ds69 w].Tg wa.µ As-euILT ° D6.a3 PRo90 m Ex°m ------------- -- ---------------------- --"- N. NOTE. TRP3LE'W WIDTH TRAP 3 LENGTH: WIDTH RATO = LW BASIN i LENGTH:MDlH RATIO = 170-L/52' W=3.3 LW / r SEQUENCE OF CONSTRUCTION - STAGE 1 V �+ A ( 1. INSTALL CONSTRUCTION ENTRANCE OFF OLD LYNCHBURG RD, TRUCKS SHALL W " `-_L _ BE CLEANED PRIOR TO LEAVING SITE. 2. INSTALL SILT FENCE, DIVERSION, AND SEDIMENT TRAPS AS SHOWN ON THIS V ^ SHEET. F '" Y IT3. CONTACT THE ENGINEER AND ALBEMARLE COUNTY FOR INSPECTION AND ^�i `i APPROVAL OF ALL E&S CONTROL MEASURES. ^CI py a 4. UPON APPROVAL OF E&S CONTROL MEASURES, BEGIN SITE WORK. 4 _ 5. MAINTAIN PERIMETER CONTROLS DURING CONSTRUCTION. 3 ' I Iss lF u'xoPE TN ��c ,,�A { MI p4 Q® O WM b k " x EE) %1SEDDdENT BASIN PROFILE 1: NyMi P> - - = - - - C8 N08. 1 40, ter, )`=ia' $IZl l ea �a -------------- -_ - _ _ raa: 426.0 DESIGN HIGH WATER Efl N! 50� _ ' I 40uExi BAyN t Gu1tE],mL}£ L / jl (25-YR. STORM E .) �' ' �I� yb _ I I$ TVE SAME AS PERMMIEHi $i RM i MIN. 2.0' D �' ---- _- - _ Ii PNE DERMA Ez 9PE SALe ${9M m I "✓ _ gyp` yj / � W _ �- � '� i I [i OF PERMnNExi PIPE SELTM / ' � N' � r A - MIN. 3.0' � / ''r �•� � -� :-J Cn El i(SEE PRCFI(EI GN 551iFEt, be. ''bI_� MIN OS MIN 10 I � Y, 1' O _ _ - __ �'ly•/� / l ' %� 67 Cr/ Ac 3s" RISEN CREU- 423.0 y �•I '� _ ��� __ / /, , J ' �r �, ti RP RP A, GHY" STOMCE C: NET TOP O Fl n I P DKAIyANE' \ _ - - _ �c i { s ES W G_ r / AS (y yI A I 1 '/. y FIRE % , WEI STORAGE PING i r i m n ( _ / _ A - _ - _ DEVICE - m TRAP 3 Aloxc T E a Tu . T3: - ' \ ;'//' -/ •> �•: -i. N T fr9 T \ y CRP o swALE ENT CiFANOI POINT O O C o E E 1 O SIN �d\�� 1":: P"��� i J J , / � � !y, {•2' � I A: NOTTGM ��ao 4 r1f .R --I, DESIGN ELEVATIONS WITHOUT B - / ARC= 90 A` : ;', 5' RISE w 3B m/ ; fi O _ a 1 "f oPR REOI gR RIs. - '{ . EMERGENCY SPILLWAY "_ (RISER PASSES 25-YR. EVENT) A I I ICI O worn_ %z1xormSEDIMENT BASIN DESIGN TABLE CB scAla N E ' I Z AREA 5.24 II 1 I'r / 1p i I 40 0 40 80 120 i III S��' >o pM j_ AN. P I, x - SOIL EROSION & SEDIMENT CONTROL SYMBOLS 1 = - ( III '- t _ -� __ SYMBOL r __ ___ _ III \'` � N0. TITLE KEY r� AMci¢ i I ,,'_i/t / / ,. __ -- = _ - '� W Z 3.02 PAWED CONSTRUCTION ENTRANCE �C O _ r i 3.03 CONSTRUCTION ROAD STABILIZATION CRS MA x / /R \ - • ��` _ ` ���%` F516i SPCR O `) I ��_____ I LL �'A --<�-�--.-�-�-�--..-,�---'--�-- -• C8t-_--�L.�y--�__•`_-�i.I �-�--- ; ^--v_-*"_ -_ -- `'�.Li`-__-___" �a __cs' ',s1R W_ �_�/_ t /sc_- P IItIs III > I(I tl x -% -X -% - 3.05 SILT FENCE pSFD LL0 W SAIIrcRxo SILT - - - F£aAfJV EOf£D EXz 3.09 TEMPORARY DIVERSION DIKE ---------a------------ �=----;_. uiELLEC _ - � _ ,_� _a�_ ���_ ��%/%, / 1,�:II 3.10 SAFETY FENCE � Z _``_ °�-� __ _ T (DRAWN TO SCALE] 3.13 TEMPORARY SEDIMENT TRAP ST IL W 11 t/ RIAgL&31 STH TRl`ET /' ___ \ L TS J 3.31 TEMPORARY SEEDING TS O m i ��I E WIDTH 33PERMANENT SPINGHya:PB XI 2S/ 7(RU 262 P> Q _ .^n'/ L✓:' W W �/� - _ 3.35 MULCH cDote /"�� 3.39 DUST CONTROL © 1i O1 2018 TREE T Scale - _ P �-�--- -- -- --_-__ LIMITS OOF F DISTURBANCE: FENCING 8.70 AC C8 OF 12 - - - - - - SEDIMENT TRAP DRAINAGE AREA Fle No, i� f 18.004 A 6. c. Rurr oA w.t vcl. w.t A C, 0n '.L ", vd, Gv 25 n El.x (Ae ) (RN.) (P-) (R.e) (P M.) - f1R.d 418.5 f21.0 f23.00 5U 351.1 Bf5.0 3511 811:0 f2f.00 I i I v 1 ti v SEQUENCE OF CONSTRUCTION - STAGE 2 1. MAINTAIN PERIMETER CONTROLS, INSTALL NEW CONTROL MEASURES AS ,lz SHOWN: U w 2. AS STORM STRUCTURES ARE CONSTRUCTED, INSTALL INLET PROTECTION. �o 3. ALL DITCHES SHOWN ON THIS SHEET ARE PERMANENT AND SHALL BE __- _. - -„ N' /�/ i ,+ STABILIZED WITH MATTING AS LISTED ON SHEET C12 F F '/�� jz %i v-% 4. SITE MUST BE FULLY STABILIZED BEFORE REMOVAL OF SILT FENCING. d + 5. AS AREAS ARE BROUGHT TO GRADE, APPLY MULCHING, TEMPORARY SEEDING (� 4 fI ccV !/,} AND PERMANENT SEEDING. v III M li.,,Z �� / }%,•£'/ + + -T 2 %v 1I 1 I ill �/,, ,�6 IF / TN Qp i i i; -, -- _--- _ _ _ _ __ ,`, coxsmoci dfu oc�Xc nrrtq 1: N�iti83 - _ - : _ �;i' / ✓ ��, s�ro �axr �qev- s xkC A4 / 11S ,{ ~ • 1 `�dsrorvu. E� ------------------ _ _ mill .1-1 T r �� v v I s oes Rr� °treau CI] o 47 Ell r i• d o so 6a eo �l � i I � 0. � '�� , / ' _ -� •d, I A 1 , _ /� � �� scare, r" 4ti' SOIL EROSION $ SEDIMENT CONTROL SYMBOLS } SYMBOL NO. TITLE KEY IZ- w 3.02 PAWED CONSTRUCTION ENTRANCE fz � O 3.03 CONSTRUCTION ROAD STABILIZATION CRS Q x —x —X —X 305 SILT FENCE sF Q J 3.09 TEMPORARY DIVERSION DIKE DD _£ `c \ - __ a ______ 3.10 SAFETY FENCE �A I '`` rTi l� [DRAWN TO SCALE 3.13 TEMPORARY SEDIMENT TRAP ST IL � W �7ROUTE &31 H R TR ET // �' IP 1 T$ 3.31 TEMPORARY SEEDING TS O m vARlggi1 wl- , R/w / _� • i W J '0X 205-314' `` PS 3,32 PERMANENT SEEDING PS Q % HYJd'P B.XI-26]7+(RU 262 // - '.'\ __ \' ` 3.35 MULCH Oote _- _- 3.39 OUST CONTROL © ii 01 2018 --`_ _ -_ -_ _ _ - PROTECTION FENCING = -� _�\ TREE Snort C. 1 - _--------- ----- - LIMITS OF DISTURBANCE: 8J0 AC 40 _\ 9 OF 12 18.004 CONSTRUCTION OF A SILT FENCE (WITH WIRE SUPPORT) .a.,B Ans A A, - e. heel WIRE HWING At THE Nepal. He CH a<wee m Abdur THEONE IF Ansel FOR, raTea MAmb Ta for MRE M Mal axn.m rom ru I a alma v Fla To iuxa. rxuwrm loll. o-¢ ON or Full Who will Nor bar upon room rMwa wllre Qc)o SILT FENCE (SF) W. WERE SUPPORT NO To Bela Sediment Trap Design Data x I Film Ln9en EA will era. 01 wet era. er Bot<om sA (ee. Ory era. a2 orb vnl. Cy rap sA (K). pa) (Req.) (n) (Prvv.) IL) (Rq,) (x) 3 1a0.5. elf", aiMo 3.a a.u11 ]BO 1Ba.G zB 1899 I— IwA 10 Ca" Jazo CROSS SECTION OF OUTLET s� `� amw,mem ;Inn NEW n Amme f"CORCREE A46REWTE IS AEL BE YD]T A. file, OR 45 OUTLET (PERSPECTIVE VIEW) r21TEMPORARY SEDIMENT TRAP (ST) GRAVEL CURB INLET SEDIMENT FILTER 0�qm9G ��rQ��,::-y. CRAWL I'll Ij- RUrypET WATER WIRE MESH F1LlFRED WATER _ R SEDIMENT CONCRETE GIRTER 12• fir\\ CURB INLET SPCCPIC APPWGTION sits .an oP DaI AlIB APPrJGB1E AT CNiB alLE19 wf10t6 "No" IN, DP THB ePm1LTU68 He NM WYELY M CALBE Emoddlde.d 6 oR OAWGE TO Adquedn T 3fRVLTI s Add oNPROTEET® AR80S. • GRPYEL W. BE VOGf I'l Bahr aR 5 a.. AnaR ., 3 INLET PROCTION IP) coo Not To Bel SAFETY FENCE PERSPECTIVE VIEW PERSPECTIVE VIEW PERSPECTIVE VIEW PLASTIC FENCE METAL FENCE SOURCE: CONWED PLASTICS VDOT ROAD AND BRIDGE STANDARDS VA. DSWC PLATE. 3.1-1 335 I'ABIE 33S4 OROAMC MDI.CII MATERIALS AND APPLICATION RATES RAlP3: Pef Acrc Per lON zµft MIrl41£_5: ttOms. Straw of Nay IN - 2 tone TO 901be. Free from weeds and mere (Mianoum 2 I ram e, Moon be anchalN. boos for Spread wi, mail blower mimed ales,) or by hand. fiber Mulch Minimum 3516s. De rat use remull for 150016s, wester rover or during hot dryperiads.• Applyss abody. Cam smite 4-6 tom 185-2TSIb, Cutor shmd4W in 4C Idol Ab-dried. D000t ruff areal to B . Apply 1h mull bloomer or by h80d. wood wipe 4 - 6 tars 10 - 295Its, Free of wars. melted. Ab- dned. heat Wide 12168 Wlrogero par mo. Do Fall v e No Rac turf areas Ally Will mull blower, chit/ hemmer. or by M1e . Berk Gips 50 - a0 et/. 1.2 eu. ydx Fmc of comes matter. Air. as YEN dned, Do not nee In Rne Shredded lurf.. AW"th Bark mulch biome,.chip haldler, or by h.od • When fiber mom, is Me oNy vtailable mulmh durng puled; when suave shmdd be hied, apply at IF minimum ram of 200o IAAlace or 4516s./1000 p- ft e MULCFDNG MU C10 Bat Ta Salle TABLE 339-A ADRESIVF.S USED FOR DINT CONTROL Weer APPGcaeon DilnOoo Type of Rafe Adhesive (A fformse: Water) Novle Ga Iffire m A .ia AsphaltE Wsion IANEX Emrdearn Rueen in Wow Acrylic EinWsion (Non-TmDic) Ass lie Emulsion (Tm .) 99 Coarse Spray 1.200 12311 Fine Spmy 235 dd Film Spmy 300 7:1 Coarse Spray 450 3 5.1 Coarse Spmy 350 is1DUST CONTROL (DC) C10 N.t T. sum TAHlavrc f@YptUIY ."postal 6E®ma MT®. ANDnAT➢b a®mO RATB NOR1N' SONrP .w wY m W.AN � .Eim ose5<PLI[v n, u„• 11 era or,off amen oslem rw r 'runum xvi1 ma - il�JUNum1new ON ho A Me E—.. mems Who all m.ual ..�rNmlwlrm Amleml. q4¢ s. Ml.6.zxn.m amx s eaomw. Plmmlwa suer Ma.. ` NMmaaxr.�e`B.:ln wdn maim +M9mi.M w.P.dmrm..d'me- X Mtl mFtNa mrwi 1M1.-e bxx - MvmmpkMres.we•.1ns. era. ci o Not T. Bate TEMPORARY SEEDING (TS) TYPICAL VEE-SHAPED DIVERSION e PAVED CONSTRUCTION ENTRANCE I ME COHSIRJCr16V nCCESS S it -'I-' TOP YX / COUR6f `x FXXING MEM • 6- M.X. 21A PCLAEGpIE "BE. srwlE PROpIfLEmx. CON,SrWrnan PX T vAVEn ACCEIl " ."SwAv+RACX zX ®� zs FnlamTsliNEMr +z wNr _- 1 u115f EXIENO Nu wl0rx �--(� 10 4puFNr xlfi[ or INGRESS ANO C.. TW➢PINE ONILE ."Numal PLAN �12' MIN. GSRNE DRVxof.r zx sEwuEr, iPaPNxG oEln[r FLTr coo: -I- SECTION A -A Aufovovaoxvlatap ofg moblw,ebelaml&im makbaulwhluuu t aI.L bvBrock aluo.HVresso pgme n xveb Twee xidl a dMmMn o(l.! wcba [at' ndN91Me a....... nXalmewags wnmImam<<aRi<d amaY lam w<Nmaua<lo au WdM.mp deone dawsve.a rtWo dralmwec<holonm 1v.se.AvB. anWllad MIpB be VemmlM ffom PAVED WASH RACK PERMANENT SEEDING SPECIFICATIONS Fepmory 16 through April m Kentucky 31 F.eaae - 128 Ibafaoe: Red Too Grose - 2 lbe/ao Annual Rye- 20 roe/lore. Ada 20 Ilormere Indian name when slaps; are greater than &I. Moy 1 through August 15: Kentucky 31 Fescue - 128 Ibseco: Rea Tod Gross - 2 Ibs/sae: Faster Miller - 20 lbv/.me Ada 20 Iw/.ere Indian areal when aiapo are greater than 3:1, Auauel 16 though October du Kentucky 31 Fescue - 128 Ibs/are: Red Top Goss - 2 Ibs/acn: Annual Rye - 20 me/acre. Add 20 Ib./acre Indian grams on elopes greater than 3:1. Noyzmber 1 ti bui 16: Rental A S. at) - 128 Ibs/aa¢ fled Top Ga... - 2 Ib./oars: Winter Rp - 2C Ibseven: Add 20 Ibe/acre Indian grass me elopes greats than 3:1. MULCHING SPECILLATIONS Show or Try .t a rate of 2 tans/acre Must be. anchored Spread With mum blower or by Kona. uME AND FERTLJE SPECIFICAnoxS: Gran, and fintuner nWed. Resell be detarminea br san trxta Sued tests Lay be preformed by the Colonel Extension Serame V Sail TOng aboratory at MPIA.SU, or by a reputable eommerous laboratory Information concealing the State Soil Testing Laboratory is c cable from CITY Ertounw, Aganla. Under unusual e.narions when It Ie not p.e.ible to omen o man feet, me foaowing aloe or -rear -le wnl be oppxee: For Permanent Se.AO, Seeress reash. mhml be hued o1 a rate of z term pan .ere, and outlined of a rate of 1,00. Ibe . per acre of 10-20-10 pG be. per 1.000 square feet) or eouiv.Ient. Fa Tomparerr Sall Settledrape anon be Inner at . rate of 2 tone per care,and foaIll at a rate of 600 Ins, per acre of 10-20-10 Da bra. per1.000 square feet) or egal.ment. )o PERMANENT SEEDING (PS) C10 Rat to Beak Sweet No. E01" Not A Semler SAFTY FENCE (SAF) CIO Not To Beeler C� �I a ew 4.. ,A US tl5 im 410 y 410 In law /3�STORM SEWER PROFILE: El—EIA C11 How 1'-30' p : C-10' ����—�I;� ,a %STORM SEWER PROFILE: D1—D2 11 HOW: 1'40' V : 1'=10' 1b Iw.. bu {w 1s 910 bw w _STORM SEWER PROFILE: El—E9 G11 JHOM f�30' YH 1'=14' 33 ME Us h Nel— 'il__�_ �I�II�p®-p�aaaaa� r1STORM SEWER PROFILE: E2—F4 C71 HOH¢.1==M vH r=10' ;t .1 {so 425 411 no 411 411 410 5 uo ws 405 nW I" 11M %F�STORM SEWER PROFILE: E2—G4 (,11 HOW: 1'-W' MP. 1'-10' =3 'a 9 W1111111111MM ® _ 1 40o U �z �5 �4 M 0 410 Ty � sewn rafw' 15,Op. 1s+.w: sMa 1nw lno�° u M. y L'.N .♦ 181 S VIO\ of 9u Iso ao aw 3 {I5 bm 4]4 � 4. 8 bz / o+mc am aw 4A i�S'ISC 4II R e 2us 1ss 41, IOIm 10,W y wIm wIW 1um 11+50 RIw ¢+w 1. "N0 .6m STORM SEWER PROFILE: E6-19 Ka1STORM SEWER PROFILE: E7—E7A C11 HOW 1'-M'v , f-10' C11 . HOW! I'-s0' WRT: I'-10' %STORM SEWER PROFILE: E4—H6 O11 HOW 1'-w' wHp. V10' �9UVK In u w No a5 .D pg- PA-,, 0� D. e — RR . I�!� STORM SEWER PROFILE: MI—M5 C12 , xoR¢ 1°=so vsan: l'=1R' .55 195 150 � W IA IA 415 let. iI 15TORM SEWER PROFILE: M1—M5 C12 NORIZ: I'=30' VRRr I'=10' r41STORM SEWER PROFILE: M2—M2A C1 v DOW: 1"=30'v®3p: 1'=10' 10LE 6 INLET WVE 0 115 IlD iZS o.. "I It p. r3\STORM SEWER PROFILE: M3—L5 C�xow: III town V-10 �s�STORM SEWER PROFILE: L4—L4A C12 Ham: I'=30' VRRT. V=10' L A 119 I� s.Re ff�_ T.RI peopu.T w, Le a :D � t ases ..reD v8wa eaovna hal o v— I6 Tn'�'ez wraimsOv'wwµseua `onto .. I RT nm Pipe Outfoll D10 (cfs) La (ft) Do (ft) 3DO (ft) cash (in) depth (in) Outlet Condition D1 0.5C 6.0 1,25 3.75 6.0 9.0 Channel K-6"tOUTLET PROTECTION TABLE (OP) C12 Net m Seethe Ditch Sections el chee� 10-1 n,, Cheops c l honna mtm ume9 Depth Depth III cft) yip e. Ec-a MotHn I'-D- 0,81 6'-0- }1 10 fa-�otting M 1 0 oa) ip W an 11 fc-3 Matting I -0' 0.39 6'-0' 3.1 Entrench WdM UK, 6" Uh1ng 5`de SV e. Depth C12 %12TYPICAL DITCH SECTION DETAIL Rol rp seine j tiarDt= FILMED END -SECTION FORM 12 -60" CONCRETE ME CULVERTS DRIP L NI .a cpm norm CORRECT METHODS OF TREE FENCING -fir CORRECT TRUNK ARMORING TRIANGULAR BOARD FENCE �1TREE PROTECTION FENCING C72 Rn ro sip E e Sheet No. Fle No, 18.004 Section 5. Stormwater Management Plan Issued—10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County GEMENT SHIMP PRO CI LAND PLANNING ENGINEERING ENGINEERING May 21, 2019 Mr. John Anderson Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: WPO 201800084 Royal Fern Phase 2 SWM Calculation Packet Dear John, Enclosed is the stormwater calculation packet for Royal Fern Phase 2. This is development will occupy a site that has an area of 8.55 acres. The disturbed area is 8.70 acres. The proposed stormwater design meets the runoff requirements set forth in 9VAC25-870-95 as the Part IIC regulations are applicable to the project per 9VAC25-870-47. After research of the approved site plan for Sterling University Housing (SDP 200100129), it was determined that the storm sewer which conveys runoff from the Royal Fern Phase 2 site (T.M. 76 P. 46A & 54) drains into the wet pond on the adjacent Cavalier Crossing Apartments property (TMP 76-54A1). This pond was designed to manage and beat runoff from a fully -built Royal Fern Phase 2 site, listed in the approved SWM calculation packet for SDP 2001000129 as the "western residue of the Heischman property". The pond was designed under VA Part IIC regulations. This design included storm sewer construction on the Royal Fern Phase 2 site. Construction was completed before 2014 while the Part IIC regulations were still in effect as the governing VSMP ordinance. Per 9VAC25-870-47 (B), "Land -disturbing activities that obtain an initial state permit or commence land disturbance prior to July 1, 2014, shall be conducted in accordance with the Part 11 C (9VAC25-870-93 at seq.) technical criteria of this chapter. Such projects shall remain subject to the Part 11 C technical criteria for two additional state permit cycles." Only one permit cycle has completed since the pond was approved, so Part IIC regulations are applicable to the Royal Fern Phase 2 project. Since the Royal Fern Phase 2 site falls under Part IIC regulations, and since the pond to which site runoff shall drain was designed to treat a fully developed site, the Royal Fern Phase 2 project must be constructed within the original pond design parameters to achieve SWM compliance. The proposed design for Royal Fern Phase 2 has less onsite impervious area than the original drainage area used for the pond design, so nutrient treatment and downstream natural channel requirements are satisfied. The proposed design for Royal Fern Phase 2 directs runoff into the storm sewers constructed under SDP 2001000129 at rates that do not exceed the capacity of the system, so manmade channel requirements are satisfied. Overall Pond Adequacy. Total Drainage Area Original Design Assumption vs. As -built Conditions The pond was originally approved with SDP 2001000129 to treat a total area of 60.26 acres @ CN=89 (ref. SDP 200100129 "SWM and BMP Report, Sterling University Housing" sheet 6). The pond was revised with WPO 201500094 and expanded to treat runoff from an additional 12.46 acres, increasing the total drainage area to 72.72 acres @ CN=88 (ref. WPO 201500094 "Fifth Street Place VSMP Plan" sheet SWM-10). To identify if the pond remains adequate, the current total as -built drainage area to the pond was re -analyzed. This was compared to the current approved design listed in WPO 201500094. SDP 200100129 Design WPO 201500094 Design Current As -Built Conditions Drainage Area 60.26 Acres 72.72 Acres 71.83 Acres Curve Number (CN) 89 (63% Imp.) 88 (63% Imp.) 78 (45% Imp.) This analysis revealed that the current drainage area is 71.83 acres @ CN=78. This is 0.89 acres less than the current design drainage area of 72.72 acres, and has a lower curve number due to less actual impervious area than assumed in the original design. This reveals that the pond is still adequate for the total drainage area and can safely manage the peak runoff from this area. Onsite SWM Hydraulic Comparison: Pond & Storm Sewer Design Assumptions Vs. New Plan Conditions WPO 201500094 did not change the land cover assumptions used for the Royal Fern Phase 2 site, and since the land cover assumptions for this area were more clearly listed in the SWM calculation packet for SDP 200100129, we have compared the proposed plan condition with the land cover and peak flow rate design assumptions from SDP 200100129. Onsite Design Assumption data was obtained from SDP 200100129, "SWM and BMP Report, Sterling University Housing" sheets 14 & 20. The results are shown in the table below. Onsite Design New Onsite Plan Assumption Condition Land Cover 80% Impervious 42.7% Impervious (6.9 Ac. Max Imp) (3.65 Ac. Imp) Original Inlet: E1 10 yr runoff: 10 yr runoff: (New Plan Inlet: Str. X) 51.11 cis 29.04 cfs Original Inlet: C1 10 yr runoff: 10 yr runoff: (New Plan Inlet: Str. M7) 45.58 cis 43.44 cfs The new plan for Royal Fern Phase 2 falls within the original design assumptions for this property because the total impervious area onsite is less than the original design, and because the total flow to each existing inlet intended to convey runoff from this property to the pond is less than the original design. This reveals that no revisions are necessary to the existing storm sewer conveyance to the pond because the new Royal Fern Phase 2 plan complies with the original hydraulic design for the site. Onsite SWM Nutrient Treatment Comparison: Pond Design Assumptions Vs. Existing Conditions Since the new plan has less onsite impervious cover than the original design for the site, the pond will provide full nutrient treatment for the site runoff. However, since the pond was expanded with WPO 201500094, we investigated if the pond's as -built condition is sufficient to provide the treatment for both the original area and for the added area from WPO 201500094. SDP200100129 Required Design WP0201500094 Added Requirements Total Required After WP0201500094 Current Pond As -Built Forebay 528 CY* 174 CY Addition*" 702 CY Total 714 CY Quality Volume 4220 CY* 828 CY Addition*" 5048 CY Total 6848 CY *Ref. SDP 200100129 `SWM and BMP Report Sterling University Housing"sheet 20 **Ref: WPO 201500094 "Fifth Street Place VSMP Plan"sheet SWM-10 The pond has sufficient volumes to provide the design nutrient treatment. Thus the Royal Fern Phase 2 site nutrient treatment requirements are achieved by the existing pond. Pond Adequacy Conclusions Since the current total drainage area to the pond is smaller and less impervious than the approved design area, we can conclude that the pond remains adequate and will continue to operate within its intended parameters. Since the Royal Fern Phase 2 proposed site has less impervious cover and less peak runoff to the existing storm sewers than the approved design, we can conclude that the storm sewers which convey runoff to the pond are adequate, and that the pond hydraulic design remains adequate. Since the wet pond current as -built conditions exceed the required forebay and treatment volume than the approved design, we can conclude that the pond is adequate to provide the approved nutrient treatment amounts. These conclusions mean that the Royal Fern Phase 2 site is fully treated by the existing wet pond and that no downstream improvements are necessary to achieve runoff quality or quantity requirements. If you have any questions please do not hesitate to contact me at: keane(a),shimp-enoineerino.com or by phone at 434- 299-9843. Contents: Post-Dev Runoff Calculations: Post-Dev Drainage Spreadsheet Post-Dev Ditch and Structure Drainage Map Offsite Drainage Map Post-Dev Land Cover VDOT LD-204 Inlet Capacity VDOT LD-229 Culvert Capacity VDOT LD-268 Ditch Capacity Pond Drainage Analysis Pond Drainage Map — Aerial Photography Pond Drainage Map — Topographic Wet Pond As -Built Volumes Independent Reports: Excerpt from NRCS Soils Report NOAA Precipitation Report Appendix 1: Selection from SDP 200100129 SWM Calculation Packet SWM and BMP Report Sterling University Housing, Sheets 1-21 Appendix 2: Selection from SDP 201500094 VSMP Plan and SWM As -Built Fifth Street Place VSMP Plan, Sheets SWM-1, SWM-4D, SWM-7 — SWM-10 Fifth Street Place Stormwater As -Built, Sheets SWM-0 — SWM-1A Post-Dev Runoff Calculations: Post-Dev Drainage Spreadsheet Post-Dev Ditch and Structure Drainage Map Offsite Drainage Map Post-Dev Land Cover VDOT LD-204 Inlet Capacity VDOT LD-229 Culvert Capacity VDOT LD-268 Ditch Capacity Sediment Basin Caclulations ROYAL FERN PH. 2 Inlet Drainage Area Summary Impervious C 0.9 Pervious C 0.3 To Area Impervious Turf C A D2 5,890 2,651 3,240 0.57 0.14 E9 14,050 6,323 7,728 0.57 0.32 E8 6,970 3,137 3,834 0.57 0.16 E7A 15,810 7,115 8,696 0.57 0.36 E7 9,920 4,464 5,456 0.57 0.23 19 50,730 19,277 31,453 0.53 1.16 E5 22,270 10,022 12,249 0.57 0.51 H6 48,100 21,645 26,455 0.57 1.10 E4 11,780 5,301 6,479 0.57 0.27 E3 37,370 7,474 29,896 0.42 0.86 G4 27,050 18,935 8,115 0.72 0.62 G3 7,500 5,250 2,250 0.72 0.17 F4 60,980 6,098 54,882 0.36 1.40 EIA 1 41,490 1 15,766 1 25,724 0.53 1 0.95 L5 11,050 8,840 2,210 0.78 0.25 L4A 20,950 14,665 6,285 0.72 0.48 L4 7,600 6,080 1,520 0.78 0.17 M4A 11,770 8,239 3,531 0.72 0.27 M2A 6,400 4,480 1,920 0.72 0.15 M2 10,690 7,483 3,207 0.72 0.25 r '- r�iil_ „r 1. __ /. ; � ----- PAST-DEV DITCH & ,: "\ INLET DRAINAGE MAP i i ribili r 41480 9F ail r V0 - tr_ — _ __— - N r __ ■ %" -- \ ash ram' _ _ _ _ i - ) - TO D1 9 F4 �— gym. O r. r. / 41 , \ r! Irk ;� Aj i' r �L//� `��J_ �/ -_I r �� ✓ ✓ r �� �� r - :: `.fib J , 50930 SF i wo �r r , ■ �� I I - � C� fA � � 1 �� � —G� i i � `�' ■ �,, �r V /E - Oe,- TO ES EY 2s� / 'ac29050 SF a' T G3 ■ �`. S . �O 1e 0 SF n i -TO E3 \ � \ .. 1 • - �� 14d� a29920TO 'SF r 922'10 aF 39340 3F TO Ea o r I I ^ao eavo SFTO E9 � ■ 1— ]5810 SF 4050 3F 1 �a° a L, ` ■ �T/ �,_/ �i �i�i il0� - i'o ].4A _ YS i f� TO 2 TO HB 51590 IF I \ 8100 SF - 110 SF 0 590 SF•> A o 7600 SF 4F sop Da r ' wW A / TO M4A 11790 SF Yo / �r1rINS I / - /'TOMS�/ B.84 AC �.AV `,`; 80 0 80 160 240 AW 75% IMP moo Scale: 1"-80' ROYAL FERN OFFSITE DRAINAGE MAP 200 0 200 400 600 Scale: 1 I E; 0 i ■ i 0 i 0) 0 19 0 n 0 0 ROUTE VARIABLE WIDTH R/W -�- HWY.P.B.XI 2 7 THRU 262 _ C 0 Cml F i 8 c ROYAL FERN T-DEV LAND COVER MAP POSTDEV LAND COVER MANAGED TURF a HSG B=4.90 AC NEW IMPERVIOUS: =3.65 AC TOTAL SITE: 8.55 AC IMPERVIOUS COVER: 42.7% w 0 80 160 240 ROYAL FERN PHASE 2 LD-204 Stormwater Inlet Computations Inlets on Grade Only Sag Inlets Only m c m "v y E d t5 Z N n a o m m () C m N W t r m X A z E115 ~ m C N C m L G m O- o w o o 2 w hl= z' _c u 0 ¢' S o Clo 0 e- r7 r m o o o 0 21 M 1 2 3 4 5 6 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 (ft) (ac) (in)hr) (cfs) _(cfs)_(cfs) (T) V) ('I') (ft) (%) (cfs) (cis) ft (% 0) D2 DI-3B 6 0.14 0.57 0.08 4.0 0.31 0.00 0.31 0.013 0.020 0.020 0.08 1.55 0.15 100.0% 0.31 0.00 7.5 0.58 0.00 0.58 1.95 0.16 100.0% 0.58 0.00 E9 DI-3B 14 0.32 0.57 0.18 4-0 0.74 0.00 0.74 0.013 0.100 0.020 0.08 1.57 0.15 100.0% 0.74 0.00 7.5 1.38 0.00 1.38 2.00 0.16 100.0% 1.38 0.00 E8 DI-313 12 0.16 0.57 0.09 4.0 0.36 0.00 0.36 0.013 0.100 0.020 0.08 "0 0.15 100.0% 0.36 0.00 7.5 0.68 0.00 0.68 0.08 1.64 0.15 100.0% 0.68 0.00 EM DI-3B 12 0.36 0.57 0.21 4.0 0.83 0.00 0.83 0.013 0.030 0.020 0.08 2.26 0.17 100.0% 0.83 0.00 7.5 1.55 0.00 1.55 4.26 0.21 100.0% 1.55 0.00 E7 DI-3B 12 0.23 0.57 0.13 4.0 0.52 0.00 0.52 0.013 0.030 0.020 0.08 1.90 0.16 100.0% 0.52 0.00 7.5 0.97 0.00 0.97 3S3 0.19 100.0% 0.97 0.00 19 YARD DRAIN 3x3 1.16 0.53 0.61 4.0 2.46 0.00 2.46 0.013 0.030 0.300 0.08 0.17 1 0.17 2.08 7.5 4.61 0.00 4.61 0.26 1 0.26 8.36 E5 DI-3B 12 0.51 0.57 0.29 4.0 1.17 0.00 1.17 0.013 0.030 0.020 0.08 3S9 0.19 100.0% 1.17 0.00 2.38 7.5 2.19 0.00 2.19 5.67 0.24 99.3% 2.17 0.02 H6 ES-1 2.5 1.10 0.57 0.63 4.0 2.52 0.00 2.52 0.015 0.030 0.200 0.08 0.32 1 0.32 1.59 7.5 4.72 0.00 4.72 0.48 1 0.48 24.00 E4 DI-3B 10 0.27 0.57 0.15 4.0 0.62 0.00 0.62 0.013 0.030 0.030 0.08 1.91 0.16 100.0% 0.62 0.00 7.5 1.16 0.00 1.16 3S6 0.19 100.0% 1.16 0.00 E3 DI-7 44 0.86 0.42 0.36 4-0 1.44 0.00 1.44 0.015 0.030 0.020 0.08 0.12 0.5 0.24 3.17 7.5 2.70 0.00 2.70 0.18 0.5 0.36 3.78 G4 DI3C 6 0.62 0.72 0.45 4.0 1.79 0.00 1.79 0.013 0.300 0.020 0.08 0.19 0.5 0.38 3.67 7.5 3.35 0.00 3.35 0.28 0.5 0.56 8.22 G3 DI-3C 6 0.17 0.72 0.12 4.0 0.50 0.00 0.50 0.013 0.300 0.020 0.08 0.08 0.5 0.16 1.00 7.5 0.93 0.00 0.93 0.12 0.5 0.24 1.51 F4 YARD DRAIN 3x3 1.40 0.36 0.50 4.0 2.02 0.00 2.02 0.013 0.030 0.020 0.08 0.18 1 0.18 2.09 7.5 3.78 0.00 3.78 0.27 1 0.27 2.39 E1A DI-3C 6 0.95 0.53 0.50 4-0 2.01 0.00 201 0.013 0.030 0.020 0.08 0.20 0.5 0.40 3.06 7.5 3.77 0.00 3.77 0.31 0.5 0.62 5.69 L5 DI-313 10 0.25 0.78 0.20 4.0 0.79 0.00 0.79 0.013 0.029 0.020 0.08 2.41 0.17 100.0% 0.79 0.00 7S 1.48 0.00 1.48 4.41 0.21 100.0% 1.48 0.00 L4A DI-313 12 0.48 0.72 0.35 4.0 1.39 0.00 1.39 0.013 0.020 0.020 0.08 4.82 0.22 100.0% 1.39 0.00 7.5 2.60 0.00 2.60 7.02 0.26 99.1% 2.57 0.02 L4 DI-3C 6 0.17 0.78 0.14 4.0 0.54 0.00 0.54 0.013 0.020 0.020 0.08 0.08 0.5 0.16 1.05 7.5 1.02 0.00 1.02 0.13 0.5 0.26 1.61 M4A DI-3B 10 0.27 0.72 0.19 4.0 0.78 0.00 0.78 0.013 0.023 0.020 0.08 2.73 0.17 100.0% 0.78 0.00 7.5 1.46 0.00 1.46 4.75 0.22 100.0% 1.46 0.00 M2A DI3C 6 0.15 0.72 0.11 4.0 0.42 0.00 0.42 0.013 0.018 0.020 0.08 0.07 0.5 0.14 0.89 7.5 0.79 0.00 0.79 0.11 0.5 0.22 1.35 M2 DI-1 4x4 0.25 012 0.18 4.0 0.71 0.00 0.71 0.013 0.018 0.020 0.08 0.07 0.5 0.14 5.65 LD-229 Storm Drain Design Computations ROYAL FERN PHASE 2 From To Catch. Runoff Incrementl Accum. I Total Total Total Up Down Pipe Invert Pipe Pipe Velocity Flow time Structure Structure Area Coef AC AC TOC Intensity Flow Invert Invert Length Slope Diameter Capacity Increment (acres) (min) (in/hr) (cfs) Elev. Elev. (ft) % (in) (cfs) (ft/s) (min) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 D2 D1 0.14 0.57 0.08 0.08 5.00 6.81 0.52 454.00 450.00 119.15 3.36% 15 12.8 5.0 0.39 E9 E8 0.32 0.57 0.18 0.26 5.00 6.81 1.78 438.50 438.00 29.00 1.72 % 15 9.2 5.8 0.08 E8 E7 0.16 0.57 0.09 0.35 5.08 6.79 2.39 437.80 429.20 169.86 5.06% 15 15.7 9.3 0.30 E7A E7 0.36 0.57 0.21 0.21 5.00 6.81 1.41 430.00 429.20 29.00 2.76% 15 11.6 6.3 0.08 E7 E6 0.23 0.57 0.13 0.69 5.16 6.76 4.66 429.00 420.20 109.77 8.020/, 15 19.8 13.1 0.14 19 18 1.16 0.53 0.61 0.61 5.00 6.81 4.19 428.50 427.20 111.07 1.17% 15 7.6 6.0 0.31 18 17 0.00 0.00 0.00 0.61 5.47 6.68 4.11 427.00 424.20 180.58 1.55% 15 8.7 6.6 0.46 17 E6 0.00 0.00 0.00 0.61 5.92 6.55 4.03 424.00 422.00 91.44 2.19% 15 10.4 7.4 0.21 E6 E5 0.00 0.00 0.00 1.30 5.67 6.62 8.63 420.00 414.20 93.86 6.180/6 15 17.4 13.8 0.11 E5 E4 0.51 0.57 0.29 1.60 5.79 6.59 10.51 414.00 412.20 76.80 2.34 % 18 17.4 10.1 0.13 H6 H5 1.10 0.57 0.63 0.63 5.00 6.81 4.29 437.00 430.20 130.00 5.23% 15 16.0 11.1 0.20 H5 E4 0.00 0.00 0.00 0.63 5.20 6.75 4.25 430.00 412.20 227.18 7.84% 15 19.6 12.8 0.30 E4 E3 0.27 0.57 0.15 2.38 5.31 6.72 15.99 412.00 411.00 43.54 2.30% 24 37.2 11.2 0.06 E3 E2 0.86 0.42 0.36 2.74 5.37 6.70 18.36 410.80 408.20 81.69 3.18% 24 43.7 13.1 0.10 G4 G3 0.62 0.72 0.45 0.45 5.00 6.81 3.04 416.00 415.20 34.33 2.33% 15 10.7 7.5 0.08 G3 E2 0.17 0.72 0.12 0.57 5.08 6.79 3.88 415.00 411.50 42.28 8.28% 15 11.7 8.6 0.08 F4 F3 1.40 0.36 0.50 0.50 5.00 6.81 3.43 422.00 414.20 74.28 10.50% 15 22.7 13.3 0.09 F3 E2 0.00 0.00 0.00 0.50 5.09 6.78 3.42 414.00 408.20 93.27 6.22% 15 17.5 11.4 0.14 E2 E7 0.00 0.00 0.00 3.81 5.23 6.74 25.72 408.00 405.82 58.78 3.71% 30 85.6 15.1 0.06 EtA E1 0.95 0.53 0.50 0.50 5.00 6.81 3.42 412.00 409.00 58.21 5.15% 15 15.9 10.3 0.09 E1' X 0.00 0.00 0.00 4.32 5.29 6.73 29.04 405.62 405.27 16.51 2.120/6 36 97.1 11.9 0.02 L5 L4 0.25 0.78 0.20 0.20 5.00 6.81 1.35 429.00 427.00 51.39 3.890/6 15 13.8 7.1 0.12 L4A L4 0.48 0.72 0.35 0.35 5.12 6.78 2.35 427.80 427.00 108.16 0.74%, 15 6.0 4.6 0.39 L4 M3 0.17 0.78 0.14 0.68 5.39 6.70 4.56 426.80 419.40 61.50 12.03% 15 24.3 15.2 0.07 M5' M4 8.84 0.75 6.63 6.63 10.00 5.62 37.29 425.22 417.31 86.48 9.15% 36 218.6 21.8 0.07 M4A M4 0.27 0.72 0.19 0.19 5.00 6.81 1.32 438.00 434.00 27.60 14.49% 15 26.6 11.2 0.04 M4 M3 0.00 0.00 0.00 6.82 10.07 5.61 38.30 417.11 415.80 50.13 2.61% 36 116.7 14.8 0.06 M3 M2 0.00 0.00 0.00 7.50 10.12 5.60 42.03 415.60 412.76 106.10 2.68% 36 118.3 15.3 0.12 M2A M2 0.15 0.72 0.11 0.11 5.00 6.81 0.72 426.00 422.56 23.10 14.89% 15 27.0 9.5 0.04 M2' M1 0.25 0.72 0.18 7.79 10.24 5.58 43.44 412.56 411.30 122.29 1.03% 36 67.7 10.1 0.20 "Existing Culvert Section ROYAL FERN PHASE 2 Modified LD-268 Roadside and Median Ditch Desi n Form Ditch C A CA Tc 110 010 Side Slope :1 L 1 R - - Min. Slope Ft/Ft Max Slope Ft/Ft Allowable Velocity On Protective Lining EC-2: n=.05 EC-3: n=.15 I Velocity I Depth I On I Velocity I Depth 9 0.36 1.46 0.53 5.0 7.05 3.71 3 3 0.01 0.04 4.0 0.19 2.28 0.81 10 0.57 1.79 1.02 5.0 7.05 7.21 4 4 0.02 0.04 4.0 0.36 2.66 0.87 11 0.57 0.33 0.19 5.0 7.05 1.35 3 3 0.09 0.11 4.0 0.07 2.99 0.39 'Velocity calculations performed using average slope for this application Royal Fern Ph. 2 Orange cells need input, white cells are calculations. Basin 1 Step 1: Preliminary Design Top of Dam 426.0 Downstream Toe of Dam 418.0 Barrel length (ft) 110.0 Slope of principal spillway barrel (%) 4.30/0 Step 2: Calculate Runoff Rational Method Drainage Area (ac) 5.24 C 0.6 12 4.3 125 6.6 Q2 (cfs) 13.5 Q25 (cfs) 20.8 Step 3: Principal Spillway From Plate 3.14-8 Spillway Capacity with emergency spillway (cfs) 20.8 Riser Diameter (in) 36 Actual head (ft) 1.00 QP (max) 29.0 Step 4: Emergency Spillway From Table 3.14-C Required spillway capacity 0.0 HP 0.0 b - Bottom width (ft) 0 Basin 1 S - slope of exit channel (ft/foot) 0.00 X - minimum length of exit channel (ft) 0 Sten 5: Grade Basin Design Parameters Maximum Top of wet Storage 423.0 Required Wet + Dry Storage (cf) 18,958 Wet Storage Required Volume (cy) 351 Required Volume (ct) 9,479 Minimum Standpipe Invert 419.4 Cleanout Required Volume (cy) 173 Cleanout Required Volume (cf) 4,669 Design Elevation Area s. 418.0 4,500 Bottom of Wet Storage 418.5 4,915 419.5 5,774 Cleanout Elevation 420.0 6,240 421.0 7,210 Top of Wet Storage 7,698 Cleanout Volume (cf) Wet Storage Volume (cf) 17,427 Wet Storage Volume (cy) 645 Dry Storage Required Volume (cy) Required Volume (cf) Maximum Top of Dry Storage Bottom of Dry Top of Dry Dry Storage Volume (cf) 351 9,479 424.0 Design Elevation Area (s Storage 421.0 7,210 422.0 8,234 Storage 423.0 9.290 16,484 Basin 1 Dry Storage Volume (cy) 611 Step 6: Final Details Upstream Toe of Dam 418.0 Principle Spillway Elevation 423.0 Trash rack and anti -vortex device From Table 3.14 D: Diameter (in) 54 Height (in) 17 From Retention Basin Design and Plate 3.14-B: Head on barrel (ft) 5.0 Q, (max) 32.5 Barrel diameter (in) 24 Dewatering Orifice Design Riser Height 5.0 h (ft) 1.0 S (cf) 16,484 Q (cfs) 0.76 A (sf) 0.159 d (ft) 0.449 Dewatering Orifice Diameter (in) 6 Flexible Tubing Diameter (in) 8 Baffle Calculation Length of Flow (L) (R) 225 Effective Width (We) (ft) 70 L/We 3.2 Baffles Required? no 1992 TABLE 3.14-D CONCENTRIC TRASH RACK AND ANTI -VORTEX DEVICE DESIGN TABLE 3.14 Riser Diam., in. Cylinder Height, inches Minimum Size Support Bar Minimum Top Diameter, inches Thickness, gage Thickness Stiffener 12 18 16 6 #6 Rebar or 1% x 16 ga. 1% x 3/16 angle (F&C) 15 21 16 7 ^ 18 27 16 8 " ^ 21 30 16 11 16 ga.(C), 14 ga.(F) 24 36 16 13 27 42 16 15 36 54 14 17 #8 Rebar 14 ga.(C), 12 ga.(F) 42 60 16 19 " 48 72 16 21 1'/W pipe or 1'/4 x 14 ga.(C), 10 1'/4 x 1/4 angle ga.(F) 54 78 16 25 " " _ 60 90 14 29 hh" pipe or 1% x 12 ga.(C), 8 - hh x'/4 angle ga.(F) 66 96 14 33 2" pipe or 2 x 2 x 12 ga.(C), 8 2 x 2 x'/4 3/16 angle ga.(F) angle w/stiffener 72 102 14 36 2% x 21h x 1/4 angle 78 114 14 39 21h" pipe or 2 x 2 x ^ '/4 angle 84 120 12 42 21/2" pipe or 21h x 21/2 x 21h x 2�h x �/4 angle 5/16 angle Note,: The criterion for sizing the cylinder is that the area between the inside of the cylinder and the outside of the riser is equal to or greater than the area inside the riser. Therefore, the above table is invalid for use with concrete pipe risers. Note2: Corrugation for 12"-36" pipe measures 2W x 1h"; for 42" -84" the corrugation measures 5" x 1" or 8" x 1". Note3: C = corrugated; F - flat. Source: Adapted from USDA-SCS and Carl M. Henshaw Drainage Products Information. III - 104 1992 Riser Inflow Curves —+ Legend Weir flw. %-9.739 Or"I' "......... Orifice flw. Oe-3.7e2 O2rX � mono VAi If01MA ■EE 1MMA row, "Iffm4mot ®1A �O, i f"dwArr, ne 9 ,r�iyf�ii7�wnnuu�s ■■■■■■unni /!I'Vi%►III ■111116ii11 ���■■■■�1111111'. MY Source: USDA-SCS III - 97 3.14 Plate 3.14-8 O O M e 1992 3.14 saON n- P 00 ORPPPu Nmm nnmaa w www r"www wwwww .•i.N,ww ... "n"" .NN mWnnm maP w ws," rw4ww . Nwwr aaPw. s«.N Nmerya nnmmm r�g�w wraa� °mwww�P.."�" �a: 2 9 .NNN9 mmnnn nmmmm aaaaaao F j mP.^ anRn9i N N aTNa mNMnn .4a N NNNVP q VVnnn nnmmm mmm 0P (6�j1 ""nN d� �^ Ra ao>ossaaxam ««., ���.. ..NaN N��nsm maryme m n nnn wnw n �� os.xryN N sa�"w�s�amaa Nn««N ��a.. ....N NNNNN NNm ee a µ P�Nmm «.Nnm a P amP.... n.N mnmPm w«N.N n m.P� " www 7 anss;g sxa n �a 2 4soap � ae� mm-oa -a ss aes :xa nary „, �e �s�m aa: rya ss sassP...`= �p 4 0o mo_ m nn J 8 V�nnm N m V� sy Nn mRPPN wNw w.ri r"www ""w.l« rwwrPPPPgO �8 M a Pm � Nm «m Nm :asasa mm m F R' NN�m Reee� 6 PN sassaa «N«N. «N«N« NN«« �aN N n a N.N mnm " "".."" N«««« m •E" .,wwwN ««:Am"_� .NS�RR8A Source: USDA-SCS III-99 Pond Drainage Analysis Pond Drainage Map — Aerial Photography Pond Drainage Map — Topographic Wet Pond As -Built Volumes v 4SE, �O 0.BO 416 m l.� 4B0 v 73.42 ACRES 'TOTAL TO F �15 ACRES IMPERVIOUS 'dry �a9z ERES PERVIOUS � ,. A R - P A - _ — -- a Rfb � 4c 464� '6a C a � 0 LA do 4 FERN PH.2 ID O ov 0 460 % o EDO O 0 p Oi ROYAL_ FERN TOPOGRAPHIC POND DRAINAGE MAP ACTUAL POND DRAINAGE INFO Includes Built —Out Royal Fern Ph. 2 Area. All Areas are HSG B. Pervious — Areas are assumed to be turf, for most conservative analysis. —c = ACTUAL POND DRAINAGE AREA: Pervious Area=39.73 Ac. CN=61 Impervious Area=32.10 Ac. CN=98 Total Area=71.83 Ac. Weighted CN-78 44.7% Impervious Area �T 0 NOTE: This drainage area is 0.89 cc. smaller than the design pond drainage area. This difference is due to updated drainage area analysis based on the current GIS topography. a Q0 DESIGN POND DRAINAGE INFO DESIGN POND DRAINAGE AREA: From WPO 201500094 12.53 Ac.-5th St Apartments, CN-86 60.19 Ac.—Other Area to Pond, CN=89 Total Area=72.72 Ac, Weighted CN-88 63% Impervious Area THE ACTUAL POND DRAINAGE AREA, INCLUDING THE PROPOSED ROYAL FERN \ PHASE 2 DEVELOPED SITE, HAS LESS TOTAL DRAINAGE AREA AND LESS IMPERVIOUS AREA THAN THE DESIGN AND THUS FALLS WITHIN THE DESIGN PARAMETERS AS ANALYZED IN WPO 201 500094. 300 0 300 600 90 Royal Fern Phase 2 Wet Pond As -Built Volumes TREATMENT VOLUME ELEV1 AREA1 VOLUMEI ELEV2 AREA2 VOLUME2 SUM VOLUME SUM VOL CF 388 12100 0 0 0 0 0.0 390 15774 27874 0 0 27874 1032.4 0 391 2386 0 27874 1032.4 392 19423 35197 392 4996 3691 66762 2472.7 394 21932 41355 394 7443 12439 120556 4465.0 395.78 39416 64338.1 0 184894.1 6847.9 FOREBAY ELEV AREA VOLUME SUM VOLUME SUM VOL CF 397 4328 0 0 0.0 398 7127 5727.5 5727.5 212.1 399.7 9306 13557.2 19284.7 714.2 Appendix 1: Selection from SDP 200100129 SWM Calculation Packet SWM and BMP Report Sterling University Housing, Sheets 1-21 Storm Water Management and BMP Report Sterling University Housing Albemarle County, Virginia 14 December 2001 Rev.03/01/02 /%i r, McKEE,CARSON CONSULTING ENGINEERS LANDSCAPE ARCHITECTS • PLANNERS 301 EAST HIGH STREET CHARLOTTESVILLE, VIRGINIA 22902 804-979-7522 TABLE OF CONTENTS Introduction 3 Project Description 3 Hydrologic Methodology & Assumptions 3 Summary 4 Pre -Development Drainage Area Map 5 Post -Development Drainage Area Map 6 Inlet Drainage Area Map 7 Time of Concentration Calculations 8-9 Culvert Capacity Checks 10-11 Ditch Capacity Checks 12-13 Storm Drain Design 14-16 Inlet Design 17 Storm Sewer Structure Schedule 18 BMP Computations Worksheet 19 Sediment Forebay Calculations 20 Water Quality Volume Requirements 21 PondPack Output — Pre -development Model Appendix A PondPack Output — Post -development Model Appendix B Public Road Drainage Calculations Appendix C INTRODUCTION Enclosed are the calculations for the Sterling University Housing project located between Fifth Street Extended, Old Lynchburg Road and Interstate 64. This report includes the BMP phosphorous removal spreadsheet, drainage area maps, inlet calculations, storm drainage pipes and structures capacity calculations, and the PondPack hydrologic calculations, including the land use (curve number) calculations, for the entire drainage area leaving the project site. PROJECT DESCRII'TION The proposed site consists of approximately 15 acres of undeveloped land. The construction property is bounded on the south by Fifth Street Extend, on the west by Old Lynchburg Road, the western residue of the Heischman property, and the Covenant School, on the north by Interstate 64, and on the east by the eastern residue of the Heischman property. The existing land cover is mostly wooded and brushy. There is an existing sediment basin/storm water management pond on the property that was designed and built for the Jefferson National Bank (JNB) project in 1994. This project will utilize the existing JNB pond for managing its storm water runoff. The original storm water pond design has been modified to account for the development of this property. Additionally, the original pond design has been revised to manage storm water from the future development of the western residue of the Heischman property (8 acres) and a portion of the eastern residue of the Heischman property (1.5 acres). The pre -development drainage area to the pond is approximately 40 acres. The post -development drainage area to the pond expands to approximately 60 acres and requires all of the Heischman western residue post -developed storm runoff to be routed through the Sterling University Housing storm pipe system to the storm water pond HYDROLOGIC METHODOLOGY & ASSUMPTIONS The SCS Unit Hydrograph Method was used to compute and route the peak flows through the revised storm water pond. Due to their small drainage areas, the proposed storm water inlets and pipes were designed using the Rational Method to compute peak flows for the 10-year storm. The post -development drainage areas and cover coefficients (curve number and "C" value) were computed assuming full build -out of this project shown on the approved preliminary plan. The curve numbers for the SCS method and the runoff coefficient C values were taken from the Virginia Department of Conservation and Recreation's 1992 Virginia Erosion and Sediment Control Handbook. This development (including the Heischman western and portion of eastern residue) will be required to detain the post -development 10-year storm runoff and release it at a rate less than or equal to the pre -development 10-year storm peak runoff rate from the existing pond. Pre -development condition in this case was assumed to be the current state of development of the drainage basin, or in other words, the JNB site plus the undeveloped Sterling and Heischman parcels routed through the existing pond and pond structures. This site (including the Heischman western and portion of eastern residue) will also be required to provide storm water quality measures to remove pollutants as measured by the phosphorus loads. SUMMARY In order to handle the proposed development (Sterling and Heischman western residue and a portion of eastern residue), the existing JNB pond will have to be enlarged and the existing outlet structure and existing emergency spillway will have to be modified. The proposed modifications to the existing outlet structure are to plug the existing intermediate stage orifices, add 2 —15" intermediate stage orifices at the new water surface elevation 396.5, and to raise the top elevation to 404.50. The proposed modification to the existing emergency spillway is to raise the spillway from 404.50 to 405.00 which also increase its width from 10' to 12'. The pre -development 10-year storm currently creates a discharge of 49.60 cfs from the existing pond outlet point. The 10-year storm post - development peak discharge from the improved pond will be 43.90 cfs at the pond outlet. The calculations show that the 10-year post -development release rate from the proposed pond is less than the 10-year pre -development storm peak rate. Additionally, the spillway structures for the improved pond will handle the 100-year storm without causing damage to the dam. The total impervious area for this site (including the Heischman western and portion of eastern residue) is 683,892 sq. ft. This is 63% of the total site areas. The calculated phosphorus removal requirement is 63%. The proposed pond improvements will include a sediment forebay, an aquatic bench around the dam at the perimeter of the water surface, and will also utilize an existing wetland bench. This should adequately address the water quality issues for this site. According to the Albemarle County Design Manual, these BMP's will normally remove 50-65% of the phosphorus. In summary, the improved JNB pond will sufficiently meet the County's storm water management requirements for the Jefferson National Bank (now Wachovia) facility, Sterling University Housing project, the future development of the entire western residue of the Heischman property, and the future development of a portion of the eastern residue of the Heischman property. Additionally, the improved JNB pond will sufficiently meet the County's storm water quality requirements for the Sterling University Housing project, the future development of the entire western residue of the Heischman property, and the future development of a portion of the eastern residue of the Heischman property. E 39D 17C ,1 14 .. - 1 1 ' .... ........ ..•• .-' •.•gyp ./ z:7.' ^` i f ` 34C f -' ` r .ItFSt RESrDuf .. - k, - SOILS LIST MAP NUMBER 2TB3C&D 34D 39D r_ _-- ---- --- 1.6a 390 16 - 39E 390, l'• ' 278 EDWENt A9N E EXISG SPdNO r SB• r -' f r -.a i-21P 390 ! r F r ' ENOE� % 1-1 • r _. ..: t Egi i._ r t 27C f 17C f / DA : 440 41 f Ol01P,$El Tc a252 1 OF {" 0000 ; ' 0 t FROM 1 rtoq Its opEarh ; 27B ,'•. idaft NAME ELIOAK LOAM GLENEG LOAM HAZEL LOAM HYDROLOGIC GROUP • • AIfrE WKEE CARSON CrMMIFN6EN6NEEN9 LEN05C• m,cHnas LmaO NEN! 001 Um High Sew LNNau fi, VA VQW f(m4r," x meluwreonam aNw.umrE..N=rr3e c..=o. uL U) O x Q !W!� F-� O C7 W W � Project No.: Sa1c Date: Revised: 0110 1'=300' 12/14/01 ini SOILS LIST MAP HYDROLOGIC A NUMBER NAME GROUP - 27B d C & D ELIOAK LOAM C 34B & C & D GLENELG LOAM B 39D HAZEL LOAM C -------------- 39E-- -- ` - \- ,�` •�• 278' '\ - _ - - - `+ ;\ i I 39D ; PROPOgD PRO$�CT S/ITE SWM POND _ 7 i. 34C I', 34B390 �a > \\ I 1 27C N � t i 27C •\, ` i _ l ... 7 1 DA 6h.26 ACRiS' 27B CN ' 1 Oi01POST1 : 43. 0 CFS - i Tc 21.6 MINUT$ \` 1 I - 1 OA 10of /%ICE MCIEE CAPSON CONEULMO ENOMEERa L"HWE MCRRECra LA 0"ERE M E. 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(2) .r (3) P10.0 21 5 n.rh«Nu] I. w.b Ul, tnu 4 u. .lraynt Lc1inN IFf. tnre..n D wad D .c.N., « n.«.... .6 3 111.014f.a. 18 2 15 ®' .5 L .5 Liz HEADWATER DEPTH FOR HEADWATER SCALES 253 CONCRETE PIPE CULVERTS REVISED MAY*64 WITH INLET CONTROL SURE" OF VVYL.IC ROPOS J 11421 181 i�- Ditch near G-1 -- 2 year computations Worksheet for Triangular Channel Project Description Worksheet G-1 Ditch Flow Element Triangular Channel Method Manning's Formula Solve For Channel Depth Input Data Mannings Coefficient 0.030 Slope 33.30 % Left Side Slope 2.00 ft/ft (H:V) Right Side Slope 2.00 ff/ft (H:V) Discharge 0.53 cfs Results Depth 0.21 ft Flow Area 0.1 ft2 Wetted Perimeter 0.95 ft Top Width 0.85 ft Critical Depth 0.34 ft Critical Slope 2.75 % Velocity 5.93 ft/s —31 6rG- 3 TyPE f� Velocity Head 0.55 ft Specific Energy 0.76 ft Froude Number 3.22 Flow Type Supercritical Notes: A = 0.13 Ac. C = 0.75 12 = 5.4 in/hr 110 = 7.1 in/hr (based on Tc = 5.0 min.) 02 = 0.13'.75`5.4 = 0.53 CFS Q10 = 0.13'.75'7.1 = 0.69 CFS Project Engineer: Eliot Fendig e:\...\0110 design\final drainage calcs.fm2 McKee Carson FlowMaster v6.0 [614b] 1/14/2002 1:44 PM © Haeslad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 1s Ditch near G-1 -- 10 year Computations Worksheet for Triangular Channel Project Description Worksheet G-1 Ditch Flow Element Triangular Channel Method Manning's Formula Solve For Channel Depth Input Data Mannings Coefficient 0.030 Slope 33.30 % Left Side Slope 2.00 ft/ft (H:V) Right Side Slope 2.00 f Jft (H:V) Discharge 0.69 cfs Results Depth 0.23 ft Flow Area 0.1 ft' Wetted Perimeter 1.04 ft Top Width 0.93 ft Critical Depth 0.37 ft Critical Slope 2.66 % Velocity 6.34 fUs Velocity Head 0.62 ft Specific Energy 0.86 ft Froude Number 3.27 Flow Type Supercritical Notes: A = 0.13 Ac. C = 0.75 12 = 5.4 in/hr 110 = 7.1 in/hr (based on Tc = 5.0 min.) Q2 = 0.13*.75*5.4 = 0.53 CFS Q10 = 0.13'.75`7.1 = 0.69 CFS Project Engineer: Eliot Fendig eA..A0110 design\final drainage calcs.fm2 McKee Carson FlowMaster v6.0 [614b] 1/1412002 1:46 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA (203) 755-1666 Page 1 PROJECT STORM SEWER DESIGN LOCATION COMPUTATIONS DESCRIPTION All pipes 15' and greater are RCP (n=0.013): all pipes less than 15' are PVC (n=0.010) -- unless Otherwise noted. FROM TO AREA DRAIN. 'A' RUNOFF COEF. CA INLET TIME RAINFALL RUNOFF O INVERT ELEVATIONS LENGTH SLOPE DIA. CAPACITY VEL. FLOW TIME REMARKS POINT POINT ACRES C INCRE MENT ACCUM- ULATEO MINUTES IN./HR C.F.S. UPPER END LOWER END FT. ,a IN. C.F.S. F.P.S. MIN. it 2 (31 41 5 (6) 7 (8) (9) 101 (11) (121 13) (14) (15) 16) (171 1181 A-8 A-7 1 0.37 0.80 0.30 0.30 5.0 7.1 2.13 412.40 411.78 123.04 0.50 15 4.91 3.55 0.6 DI.3A H=3.92' F-1 A-7 1 0.16 0.75 0.12 0.12 5.0 7.1 0.85 414.83 41 L78 54.49 5.60 15 16.44 670 0.1 01.3A H=3.92' A-7 A-6 1.36 0.80 1.09 1.51 5.6 6.9 10.42 411.68 409.90 355.51 0.50 21 12.05 529 1.1 01-1 H=5.97" -1''. A-6 13.90 0.75 10.43 10.43 13.6 4.9 51.11 407.50 407.22 37.90 0.75 36 62.13 923 0.1 ES-1 Al-4 Al-3 0.50 0F0 0,20 0.20 5.0 7.1 1.42 423.50 422.00 75.03 2.001 8 2.39 6.75 0.2 YD A2.1 Al-3 0.03 0.40 0.01 0.01 5.0 7.1 0.07 422.60 422.00 56.96 1.05 4 0.27 2.-8 0.4 YO Al-3 At-2 0.20 0.60 0.12 0.33 5.4 6.9 2.28 422.00 419.03 99.02 3.00 8 2.93 873 0.2 YO Al-2 Al-1 0.14 0.50 0.07 0.40 5.6 6.9 2.76 419.03 416.87 61.81 3.50 8 3.16 9.57 0.1 YO Al-1 A-6 0.33 0.50 0.17 0.57 5.7 6.8 3.881 416.87 411.35 84.92 6.50 8 4.31 13.07 0.1 YO A-6 A-5 1.32 0.75 0.99 11.99 13.7 4.9 58.75 407.12 405.76 271.56 0.50 42 76.52 8.25 0.5 DI.4AA H=13.38' D-1 A-5 0.32 0.80 0.26 0.26 5.0 7.1 1.85 421.47 420.871 60.16 1.00 15 6.95 4.541 0.2 DI-3AH=3.92- A-5 A-4 0.12 0.90 0.11 12.36 14.2 4.8 59.33 405.66 405.18 96.93 0.50 42 76.52 8.27 02 DI.4AA MOD. H=21.54' - ' A-4 13.81 0.75 10.36 10.36 17.4 4.4 45.58 414.00 412,60 139.65 1-00 36 71.74 10.16 0.2 ES-1 A3-5 A3-4 0.18 0.70 0.13 0.13 SA 7.1 0.92 424.69 422.71 99.02 2.00 6 1.11 5 C4 0.3 YD A3.4 A3-3 0.14 0.70 0.10 0.23 5.3 7.0 1.611 422.71 422.09 31.00 2.00 8 2.39 6.94 0.1 YD A3-3 A3-2 0.22 0.65 0.14 0.37 5.4 6.9 2.551 422.09 419.12 99.02 3.00 8 2.93 8.8AI 0.2 YD A3-2 A3.1 0.19 0,70 0.13 0.50 5.6 6.9 3.45 419.12 415.83 65.81 5.00 8 3.78 11.47 0.1 YD A3-1 A-4 0.10 0.60 0.06 0.56 5.7 6.8 3.61 415.83 414.19 27.36 6.00 8 4.14 12.57 0.0 YD A4-4 A4-3 0.04 0.90 0.04 0.04 5.0 7.1 0.28 424.73 424.28 8.94 5.00 4 0.60 6 3- 00 Trench A4-3 A4-2 0.08 0.55 0.04 0.08 5.0 7.1 0.57 424.28 423.75 26.53 2.00 6 1.11 5.3z 0.1 YD A4-2 A4-1 0.07 0.70 0.05 0.13 SA 7.0 091 423.75 422.70 52.54 2.00 6 1.11 5.93 0.1 YD A4-1 A-4 0.06 0.60 0.04 0.17 5.2 7.0 1.19 422.70 419.57 78.25 4.00 6 1.57 8.25 0.2 YO A52 A5-1 0.01 0.50 0.0t 0.01 5.0 7.1 007 424.62 424.46 18.00 2.00 4 0,38 3.13! 0.1 YO A5-1 A-4 0.011 0.501 0.01 0.021 5.1 7-01 01431 424.46 423.98 2422 2.00 4 0.38 3 Trl 0.1 YD A6-1 A-4 0.10 0601 0.06 0 06 5.0 7.1 043 425.43 422,42 75-21 4.00 4 0.53 E 321 02 YD A-4 A3 O.T 0.75 0.56 24.09 17.6 4.3 103,59 405,08 402,94 356.56 0.60 46 119.68 1C.'! 0.6 DI-4AA MOD. H=20.13' A-3 A-2 1 0.211 0.851 C.1E 24.271 18.21 4.3 104 35 402841 402.16 110.25 0.60 48 119.66 10.C5! 02 DI-4AA H=19.75' s PROJECT STORM SEWER DESIGN LOCATION COMPUTATIONS DESCRIPTION All pipes 15' and greater are RCP (n=0.013); all pipes less than 15" are PVC (n=0.010) --unless otherwise noted. FROM TO AREA DRAIN.'A' RUNOFF COEF. CA INLET TIME RAINFALL RUNOFF O INVERT ELEVATIONS LENGTH SLOPE DIA. CAPACITY VEL. FLOW TIME REMARKS POINT POINT ACRES C INCRE MENT ACCUM- ULATED MINUTES IN./HR C.F.S. UPPER END LOWER END FT qe IN. C.F.S. F.P.S. MIN. (1) (2) (3) 4 (5) (6) 7 (8) 9 10 (11) (12 13 14 (15) 161 117 18) 82-5 82.4 0.03 0.45 0.01 0.01 5.0 7.1 0.07 428.80 428.37 42.63 1,00 4 0.27 2.44 0.3 YD B2.4 82-3 0.03 0.40 0.01 0.02 5.3 7.0 0.14 428.37 428.14 23.28 1.00 4 0.27 2.92 0.1 YD B2.3 B2-2 0.07 0.75 0.05 0.07 5.4 6.9 0.48 428.30 427.91 38.70 1.00 6 0.78 3.97 0.2 YD B2-2 82.1 0.08 0.75 0.06 0.13 S.6 6.9 0.90 427.91 426.30 80.49 2.00 6 1.11 5.92 0.2 YD B2-1 S-4 0.09 0.75 0.07 0.20 5.8 6.8 1.36 426.30 421.98 163.27 2.65 8 2.75 7.44 0.4 YD B-4 B-3 0.20 0.75 0.15 0.35 6.2 6.7 2.35 421.40 417.83 78.30 4.56 15 14.84 8.38 0.2 DI-3A H=3.92' B•3 B-2 1.32 0.85 1.12 1.47 6.4 6.6 9.70 417.73 411.63 250.08 2.44 15 10.85 9.36 0.4 DI-1 H=4.27' 81-3 81-2 0.44 0.50 0.22 0.22 5.0 7.1 1.56 420.98 419.37 80.49 2.00 8 2.39 6.89 0.2 YD B1-2 Bt•1 0.33 0.50 0.17 0.39 5.2 7.0 2.73 419.37 418.14 35.21 3.50 6 3.16 9.56 0.1 YD Bt-1 8.2 0.03 0.40 0.01 0.40 5.3 7.0 2.80 418.85 414.39 127.51 3.50 8 3.16 9.58 0.2 YD B-2 B•1 1.01 0.75 0.76 2.63 6.8 6.5 17.10 411.53 408.74 66.00 4.23 18 23.24 13.56 0.1 DI-3A H=8.00' B-1 A-2 0.78 0.85 0.66 3.29 6.9 6.5 21.39 408.64 405.36 131.17 2.50 21 26.95 11.70 0.2 DI-3A H=7.77' A-2 A-11 0.00 0.00 0.00 27.56 18.4 4.2 115.75 402.08 401.95 16.60 0.75 48 133.81 11.24 0.0 MH-1 G-2 G•1 82.13 0.50 41.07 41.07 20.0 4.0 164.28 403.50 395.20 113.43 7.32 54 572.29 29.47 0.1 JB-1 w/ rate H-2 H•1 0.31 0.85 0.26 0.26 5.0 7.1 1.85 405.36 399.00 33.83 18.80 15 30.13 12.92 0.0 DI-3AH=8.00' 11.5 11-4 0.03 0.45 0.01 0.01 5.0 7.1 0.07 426.15 425.72 42.63 1.00 4 0.27 2.44 0.3 YD 11.4 11.3 0.02 0.35 0.01 0.02 5.3 7.0 0.14 425.72 425.49 23.28 1.00 4 0.27 2.92 0.1 YD 11.3 11•2 0.06 0.80 0.05 0.07 5.4 6.9 0.48 425.65 425.26 38.70 1.00 6 0.78 3.97 0.2 YD 11-2 11.1 0.05 0.70 0.04 0.11 5.6 6.9 0.76 425.261 424.50 53.00 1.43 6 0.94 5.01 0.2 YD Inlet o U O O O N c i e N N - W 3 En to `• k7 N `�' .i t �.�J 4 7 L W t. i a 9 tl E Y O �d Remarks 8 A-8 3A 2.5 - 0.37 0.80 030 030 4.0 1.18 0,0016G 20 0.020 2.0 6.1 0.19 0.39 0.49 1.9 sum eir F-1 3A 2.5 0.16 075 0.12 0.12 40 0.48 0.0020 0.048 2.0 6.7 0.11 0.39 028 0.8 sumptweir A-7 1 4.0 1.36 0.80 1.09 1.09 40 4.35 0.0031 0.020 2.0 0.24 3.8 sump/weir A-6 4AA 4.0 1.32 0.75 099 099 40 396 0.0023 0,020 2.0 7.6 0.37 0.39 0.95 f0.3 sum weir 0-1 3A 2.5 0.32 0.80 0.26 0.26 CO 1.02 00001 0.058 2.0 6.1 0.17 0.39 0.44 1.7 sum eir A-5 4AA 4.0 0.12 0.90 0.11 0.11 4.0 0.43 0 00020 0.020 0.013 1 8 2,0 1.11 0 083 4,15 0,93 351 0.146 0.156 5.4 0.74 0.91 0.39 0.04 overflow to A•4 A-4 4AA 4.0 - 0,75 075 0.56 0.56 4.0 2.25 0.04020 0010 2.0 7.6 026 0.39 0.67 9.1 sumpAveir A-3 4AA 4.0 0.21 0.85 0.18 0.18 40 071 000020 0.038 20 7.6 0.12 0.39 0.31 1.0 sump/weir Bd 3A 25 0.20 0.75 0.15 0.15 40 O60 000 0.60 0020 0020 2.0 6.1 0.12 0.39 0.31 1.2 sumphveir 8.3 1 4.0 1.32 0.85 1.12 2 40 a0 0.00 a.a9 0.028 0.020 20 0.25 4.2 sum elr B-2 3A 2.5 - 101 0.75 0.76 0.76 4,0 303 0.0) 3.03 0.015 0.020 2.0 6.1 0.36 0.39 0.92 9.75umphveir 0-1 3A 25 0.78 0.85 0.66 0.66 4.0 2.65 000 2.65 0.024 0.020 2.0 6.1 0.33 0.39 0.85 8.1 sumplweir H-2 3A 2.5 - 0.31 085 0.26 0.26 4.0 105 7.00 1.05 0.001 0.020 2.0 1 6.1 0.78 0.39 0.46 1.7 sumpMeir STORM SEWER STRUCTURE SCHEDULE STRUCTURE ID STRUCTURE TYPE NORTH EAST TOP ELEV INVERT IN INVERT OUT PIPE DESCRIPTION A-1 -_ GS-1 �. 530613 533712 40196 - _ 5306 16 5320 52 408 44- 402 18 402.08 MH-1 _ 71025 LF 48" _ RCP Yiil _ _ OuO% - A-3 - - _____ _A-4 _ ---DI.JCC; _ _ DI-4CC MOD_ 5232_ 29 _ 520897 _ 5238- 6 _ 4882.88 _ 422 59 f 02 94 405.18 _ 402 84___ 35G 5G Lf- 48" HOP tut 0 60"/ 425 26 405 08 96 93 LF 42" R_CP__9 0 50- DI-4CC MOD. 5262.02 4801.76 406.76 405.66 A-5 427.37 420.50 40990 407A2 27453 _ LF J2' RCP Gil 05t1% A-6 D1-4CC _ 5474 65 4628.11 355.50 LF 2 "RCP fa 050 A-7 DI-1 582211 a55290 41774 41178 411.68 123 04 LF 15" RCP 4u 0 60_% A-8 DI-3C 59a4 73 4542 80 416.32 41240 A-2 MH-1 530616 5320 52 408.44 402 18 402.08 131.17 LF 18" RCP N 5.53 _ 8-9 DI-3A 5a27.78 527138 416.31 409.53 409.43 66.00 LF t8" RCP n 3 00% _ 8-2 DI-3A 5397.87 5194,19 419.57 411.51 411.41 DI-i 5663 43 St35 09 250.08 LF 15" P.CPM2.50% _ _ f�. 3_ 422.00 11 4.86 417 76 l3_4_ _ DI-3A _ 5727 OS 78 30 LFi5"RCP_ U 4 21 5t80 73 a25.34 421.40 f A-4 4CC MOD. 520697 4882.88 425.26 412.60 405.08 -C-1--ES-1 _ _.94_ 139.65 LF 3G' _ IiCf� i� 1.00% 5_074.25 4821 _ 114.00 _ ---- ---- DI-aCC MOD 5282 02 4807 46 427 37 A-5 420.87 46568 425.42 421.47 60.16 LF 15" RCP ra 100% D-1 DI.3C 5277.53 4743 63 5474 65 4628-11 3790 LF 336"R_CP _ FLid_07,;% A-6 DI-4CC 42050 407 22 407.12 545313 459692 E-1 ES-1 407.50 A•7 DI-1 582211 d55290 41774 41176 411.68 54 49 LF 15" RCP Fu1 5_60% F-1 DI-3C - 5837.74 450070 418.75 414.83 G-t -- HEADWALL 5937.Ot 4355 06 395.20 0-2 5835 25 a335 73 403.50 ------ 113 43 LF 54 - RCP rd 7 J2% 43-1 9{100 _ �ES-1 5935 46 4378 97 H-1 _ 399.00 D1L3A 690293. 33.83 LFi5' _ RCP r,� 8 90 H-2 4388.28- 412.86 405.36 Short Version BMP Computations For Worksheets 2 - 6 Albemarle County Water Protection Ordinance: Modified Simple Method Plan: Sterling university Housing Water Resources Area: Development Area Preparer: McKee Carson Date: 12/14/2001 Revised: 3/1/2002 Project Drainage Area Designation Project site + Heischman Western Residue L storm pollutant export in pounds, L = (P(Pj)Rv/12 j t C(A)2.72 ] Rv mean runoff coefficient, Rv = 0.05 + 0.009(I) Pj small storm correction factor, 0.9 1 percent imperviousness P annual precipitation, 43" in Albemarle A project area in acres in subject drainage area, A = 25.10 C pollutant concentration, mg/I or ppm target phosphorus f factor applied to RR V required treatment volume in cy, 0.5" over imperv. area = A(I)43560(0.5/12y27 RR required removal , L(post) - f x L(pre) °%RR removal efficiency, RR100/L(post) Impervious Cover Computation (values in feet & square feet) Item pre -development Area post -development Area Roads Length Width subtotal Length Width subtotal 0 0 0 0 0 0 0 0 0 0 Driveways Length Width no. subtotal Length Width no. subtotal and walks 0 0 0 0 0 0 0 0 Parking Lots 1 2 3 4 1 2 3 4 0 0 0 Structures Area no. subtotal Area no. subtotal 0 0 0 0 0 0 0 0 0 0 0 0 Actively -grazed pasture & Area Area yards and cultivated turf 0 x 0.08 = 0 0 x 0.08 = 0 Active crop land Area Area 0x0.25= 0 0x0.25= 0 Other Impervious Areas 0 683892 Impervious Cover 0% 63% 1(pre) I(post) Rv(post) V 2$,y85 cf 0.61 1055.4 New Development (For Development Areas, existing impervious cover <= 20%) C f I (pre)* Rv(pre) L(pre) L(post) RR %. RR Area Type 0,70 1.00 20% 0.23 35.44 94.45 59.01 62% Development Area 0.35 11.00 0% 0.05 3.85 47.22 43.37 92% Drinking Water Watersheds 0.40 1.00 1% 0.06 5.19 53.97 48.78 90% Other Rural Land ' min. values Redevelopment (For Development Areas, existing impervious cover> 20%) C If I (pre)' Rv(pre) L(pre) L(post) RR %. RR Area Type 0.70 0.90 20% 0.23 35.44 94.45 62.55 66% Development Area 0.35 0.85 0% 0.05 3.85 47.22 43.95 93% Drinking Water Watersheds 0.40 0.85 1% 0.06 5.19 53.97 49.55 92% Other Rural Land Interim Manual, Page 70 rev. 31 March 1998 GEB 'L0 S21 (Y) tni t4er`,�� S� 1L I5 Ac1rs TnIP rvIoIAS A('eq r�e �man We - Jere ReSl;dnC U•{%� C.CeS NASSu^,t 50O�u-i--peroous//1� 1 rea = 61 Acrec, t*5Ck Aa f=r,irfn ZPS.dAf- ^ 5-AcresQ &07 pr.,ruw-t, _ I crc- Ienef.rVio�S 'rtr<w 15.7 Acf-cS 9� r'eat Sed �lenl rare / VJ ILA-A�( �. . = 15. � Atrts'x 0,25;,c,1cs = I Z ; �c6/R- x 9 5j560 R/AUc, =Z7F4Jc( = 52,8 o-1 I Anew 753 129 `} ZIT50 50�0 TorcCJ-, / V o��M4 Vo),5"n(cF) 0 1OZ4 I,0Z.1 61157 10,I Z5 r13o C voLknic- ?roo,4jeo( MD cr) > vol-Amc �U V..'rCA L� We+ 4 x VV QV TienUt - 00 I / Iota x CO r W �7crm.,nc�l ?aal. 55 c Co�i�«r tle��t .o,. _V�►Nmt sG-n Cey�------- - 33s_ o O zo 'ad 39t 5- 9 `toy y 0 Z-`i /46.3 Appendix 2: Selection from SDP 201500094 VSMP Plan and SWM As -Built Fifth Street Place VSMP Plan, Sheets SWM-1, SWM-4D, SWM-7 — SWM-10 Fifth Street Place Stormwater As -Built, Sheets SWM-0 — SWM-1A EXISTING WET POND EXPANS 01M L_ I I > E m ERGENCY SPILLWAY 263 C.Y. OF VDOT EC1, CLASS 1,; RIP. -RAP INSTALL VDOT \EC-3 UNDER 'RIP -RAP" k� A ---RE-FER-TO---_ STM-1 PROFILE VSMP PLAN o 11111111A EXPANDED FORBAY AREA EXISTING POND RISER N. TS. "CONTRACTOR SHALL CLEAN OUT THE EXISTING RISER STRUCTURE AND DRAW DOWN THE POND TO THE DESIGN WATER SURFACE ELEVATION OF 396.50 EXISING 48" RISER__, CREST 0 404.50 - - - - - - - - - - --- 1DQ_jYB_5TDRM_@_4Q7Da - - - - - - - - - - - - - - - - - - - - - - - J(LY3 _5TQRM JA,,51 --R-4 . . . . . . . . . . . . . . . . . . — — — — — — — — — I 1R__510R)%L A AU-75 — — — — — — — — — — — — — — — — — — - — — — — — — — — j _y L 51 QB bL _9_A0_00 L — — — — — — — — — — — — — — — — — — TOP OF POND @ 396.50 EXISTING AND PROPOSED i-n (2) EXISTING 15" ORIFICE MAINTAIN INV. ELEVATION I W-0- --*-10, N-N 396.50. PROVIDE (2) SAFETY AQUATIC PLASTIC SOLUTIONS BENCH BENCH STORMRAX OR APPROVED BOTTOM OF POND 0 388.00 EQUAL. EXISTING AND PROPOSED .FER TO 6 PROF1 AP PLAN (2) PROPOSED 18" ORIFICE INV, ELEVATION 400.50. PROVIDE (2) PLASTIC SOLUTIONS STORMRAX OR APPROVED EQUAL. EXISTING RISER AND OUTFALL PIPE 30"0 RCP FLOW 3A IN19114 ON& VA17,1121111111 REFER TO P/\-STM-8 PROFILE VSMP PLAN /3\5 0. \ 40' S(--A:-L IN FN�! 11 A "Aia VDOT EC-3 LINING rhfet �Pond #1 (Ex. Riser) VA DEQ, Stommoater De-sigin Specification No. 14 (Level 1) P t2 NINAH"A Date. 8/4/201. 5 County/Cfty: Albemarle la La 8 0 & �a ,wu� Cc I�� ResrOalii Event i,00 inches u I a imn BMW Drairmigc, Ama Suunmwy (A&�rvs) 0 a T_ Totals 1_LsndCoVfr Rv ia Ed So-i- I 9L m > T! P (,--',V 0 L; 0. 0,9C Uj 7T I ............. j ------ ------ - - -------- - - ---- i 0100) 1) GTJ 22 iC . ... . .... ........ . Fw .. . ....... _j 11 12 CL Totals Rvc0efficwatts A soils I R soi k C suds O Sc ms h® LU or sto Uj 0.04 rMlant.'aaged Tl�urf 0_1 5 1 0, 2C ----------- ....... Imp e i-vio us Cover 0 - 9�1 0,95 Cl) U) DeT.errnlne Requlm�,d MiniMptim Sur -face Aria rig Dninagc Area] "Recommendpd" --- ------- - - - - - _-_---- - - - - < Mimunum Suif,_e Area I IV" 6UG 1[31A� of ContibutinG Drainage Arcal "Recorm-n-ended" ,eAi c,,a 4 270 If,- N111 n i rn u im S u f f a Provided i OK - Sirface.Arcii Mwiled Moets, Design Require;tients Su, ricace Are P t z 'r"p- n ri a c, Are Determine Provided Treatmeea Vmumv, ........... - ------ > VCILI Elevation Area A2,SCM Aj,' 2 V, I -------------- - --------------------- 5,367 0 0 0 UD 12 202 5,754 16, 9 .,'i 5,652 21jIlu 41-1 oci 16,96fi 628 392.00 t 6,164 18,184 21,N7 833 6,266 29,293 - - - ------ - r --- -- -------- ----- - -------------T i 6573 10,41-1 �i,47f, 35,763 0- --i— _11 --- -------- 4�---------------------- Uj 7, 105 '20,312 6,837 42,601 1,578 0- ------------- t 1,867 -1 2 3, 4 74 7,mlz 50,409 - — - - ------------------ - --------- --------- ------ 9,()22 26,329 4,388 54,797 2�030 ------------- ---------- --- U) co Di�tem,.aaa Pequimd TrPatment Vcdr n- Volume from " Remaining Runoff Upstmam Rk Kul-lolMcAuctiOri i 1 0 I. volume LL C) prictic, I:_J LD� ------- perviousAnc;,� 3862 1-863 Bioretention I & 2 - ----------- ---- - — - - - -------- < TurfArea 124 10 -1 , , 504 B(orctention I FA 2 ------ ------- LL1 Tv V v, v0junno reduced by an mpst,,eafn BNAIP < 'fV provi dr,"i 18K - TrcatrTic m', Volume Prot/ dod Moets Desion Requi,omo.-ItS DetOrmine prc-vided FwLay volum,�! LO < Aea U ff-A2+�qr(w 2) Vo our 0, V0 Elevation lume. suirn Volume sum (D 2 C4 il) 1 4 0K.I 3� 141 0 0 0 4 1A , 874 J_ 350T 130 LU 03 ------- 4,289 7790 2S9 LU z 14,339 4473 W,263 380 Lij Ld 39700 S,F,38 1G,219 966 48-0 --------- -- 39------ � I,- z Z: 8-00 (�,(525 6125 i9,091 707 w ---------- -- 67 2 7,143 26,234 972 1 7,6 3 �< - A 3 9 9. C11 0 40000 8,7-1,9 24,1639 8, 2;,, 0 34,454 00 ------ - ----- R, N te mi ne R," ui re d Fa tray Vo I urrie (Z) -J�K,� Target Rainfall €+ ertt 0 ZS firches, comments .............. . . .... . . .. .. . . ..... & . .. ... ....... F �V' orbay Vol urnQ Required 4,701 Ift, Forbaw Yolume Provided 8,220 JOK-FobayVole me Provided i[4-GFiretif)Depth1 6.60 NI—eet- s Design Requimments Fo�hay De.pth Provided N31 Oetetrninn Requimd Ge.aynenji - ------ - ---- ----- Length ui'Sho� to Fiovit Path 320 ------- ---------- po LS-hortestFl0i'v Pad:hlovn�all Lengthl "�0.5 Ov-,-,Il i erigtl� 415 -Z -P, nidc� OK - GeorrieLy Prodded Dleets Design Requiremepts aLo i i0vefallLength 0,77 1)� I I - ------ ------ - — — ------ "J_ 00 --------- - --- -- ---- ---- -------- Ii n= try Uj W i -,it h 1-15 LL Lengrh/ Width] ��2 ------- . .... . .... Length Width J-26 lun]tios; DOES NOT MEEI'DESIGN REQUIREMIENTS "Existing Canidtion" --- ------- ......... -------- - DetRrinlne Actepab!e Water Dopa� ------ ------ ---- -- Ci N n Death '02 lirl if)PI rt Rate [ET( iticrthly In lt,at o ri Lo .s lin NNFI LU for S 24 lin Ir, s,co mo,asured Base Flow Rate 0 [MBI 0 ------ - CLUSa 2. ILA d ft2j Q EMERGENCY SPILLWAY N. T S. mawvm� Zml �1% G Nry r —CREST OF EMER E M _161 0� 40,5,F WFIRY -%41&, SPILLWAY @ 405.00 24" VDOT EC-1 CLASS I RIP -RA• CONNECT TO EXISTING EMERGENCY SPILLWAY 2 a' LO 0 4 09 '' ,•'hY y �' � +«,-. wY-i�• at.3.Y6L l y, 4aR+tfd .t'+�.-`-5�5� .... ... i , 3� ,.. � ... ........_.. � � -..... ^4 - _ �,r�`.. w. 'Y - NN \ \` � � ' V \ "'NW W �� V/ - "W '+Y V'- W WETLAND TYP. W W �� _ W � W sl/W V/ W W W V V` W 4 W 4ts 20' 10, 0 20' 40' 60' SCALE 1"= 20' Uj' CN G+3 Ill L p( ppgg U6 (} � UB F 0 LL W LU .. Lo G Z co r T� 4J ` ^ �W b c Z � 00 00 � LTl m t J �x La t � 6 C ti f G 3 OVERALL PRE DEVELOPED DRAINAGE .AREA MAP — " 1 / -/, �'�&' _ `.. ,� _ �. �% /�t #�G" �� � `•mar - , � E M.r W EXISTING LANDCOVER MAP ,« ` a 4 TOT — 8,7 AL SITE AREA — 16 27 AC (70 21 .F.) EX. FOR ED AREA/ OPEN SPACE = 571;517 S.F. (fi3.12 AC) � r v / ' I » G P! ' EST Y / » c v a e v x IV T pW r r 1 » s y Er e'Py»r / 3 t EX. MANAGED TURF AREA= 104,245 S.F. (2.39 AC) r. LLJ «� Lli < _I I f ' - 14.7 % pqy crj Y, i EX, IMPERVIOUS AREA= 32,959 S.F. (0.76 AC) t 4.7 % Pq E _ ' e,+' ) " 1 J/ cc l r � »W ,.i �. 1.•' _ / r '� » 1 . a » » i » » a , / yy���� »a A na' » » » r a / 1 • / 1 / w s a o a w / r P " T » °� » t dT ! 4 t r• � �4 » x o » « . » LL a rj uj I r t < pggg r. _ pa t� t r' SCALE iN FEE f < OVERALL POST DEVELOPED DRAINAGE AREA MAP �— co CD Luuj a it Lu _ h ` � W s, r' -J e � 'rx�vKsenao Y{ /Yv..,.... - � � Y, fir•: / JA' v _..� .-.;.�•�:.,-,�'..•..•.•• +� •.-. w �_'`' « LANDCOVER lPROPOSEDMAP � :.•' ate.. :; " r ::.: •.: TOTAL SITE AREA = 16.27 AC (708,721 S.F.a • e ra :r ✓ „ , •�.Xw:��`�• — PROP. FORESTED REA(OPENS ACE 77 1 1S.F.F1.77 AC l AQ� ✓ �.. o 10.9 IV s9 PROP. MANAGED TURF AREA= 357,192 S.Fa (8.20 AC) �, Z_ lw 48.8 d 1. 8 0 v a r, r f , + u ev . , , r•••.`.• Yf �' —�' PROP. IMPERVIOUS AREA- 274,428 S.F. 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I + I r \ y O t!/i/. , \ � It .� i ,o NV 11 .. 10 ,r �'y '%(�I I j�l (----- � e y p �;, �/ 3 �o W � V �' -- ice` I . m c� tn,_ /I I �lrl(j/pp�� V '\ iw ��\ H 3// r %,� ems" -� VA `a V A�xoR"�� — / // • �, �\ \ �i II © x F" ,v rw" A\ �� ,., - l 1. It �'��� l 4 ,`x , \� U7 ,L / / 7 / �p W J 4 I I 111 O ` '^- _ O II w V �:�� �,:� ,�.: %1'1�1 �11 I , I �\ , ll I -,�/ n \ \ / �� \\� \\\�� n " ice' ` /lr��/ // (r \r \ A , , �� , II l / i i \ \ �_ f f ram_- - \ ` .." - FIFTH STREET PLACE RICH, M , VIRG W 23 �e Jvq� ENGINEER. NR AVSMP PLAN t.�. MiLLS 'n 'ate CHECKED: MMM ALBEMARLE COUNTY, VIRGINIA LIC. Nc.j�$3p HET I PLAN REVISIONS - WM-9 02 1 16 PER coal m t CALF; WC / TR INLET DRAINAGE AREA MAP JOB: 814-1 58 1 1 91=60' 0 D.A. = 72.72 Ac, CN = 88 Tc = 21.6 min. WEIGHTED CN: 12.53 AC.— 5TH STREET APARTMENTS @ CN = 86 (SEE SHEET SWM-8) 60.19 AC. OFF —SITE TO POND @ CN = 89 (SEE STERLING POND REPORT) D.A. = 1.60 Ac. CN 91 Tc = 7.7 min. WEIGHTED CN: 1.13 AC.VIMPERVIOUS @ CN = 98 0.34 AC. TURF @ CN = 74 0.13 AC. FORESTED @ CN = 70 BMP DRAINAGE AREA NOTES: BIORETENTION 1 DRAINAGE AREA CONSISTS OF INLET AREAS 18, 20, & 22, BIORETENTION 2 DRAINAGE AREA CONSISTS OF INLET AREA 16. SEE SHEET SWM-9 FOR INLET DRAINAGE AREAS. FIFTH STREET PLACE STORMWATER AS=BUILT ALBEMARLE COUNTY, VIRGINIA MAGISTERIAL DISTRICT SCOTTSVILLE z O JEFFERSON I I Mq� sT U) PARK AVE > �� LLl 7J FwgrFRsr g a << z rn n W Q O rn m U o° � U z Q A Q� 9G mJ�O N RR�S RO 5� P 2 PROPOSED OFF -SITE 40 MONpCpN R� SANITARY SEWER IMPROVEMENTS O LtJ Q Q z o NPROPOSED ,��Fti i WW W 5TH STREET PLACE 5 CpI d c LIJ DEVELOPMENT QO ST. �PS W j Z o� W O ::) o If U L VICINITY MAP = w Q O LU Scale: 1" = 2000' � F) m v U- Q 00 z N Lo LU W Y d LLl Y Q eo pj Z Q z = Q m Lu U U O � SHEET DESCRIPTION VIA 0 SWM-0 COVER SHEET _j SWM-1 AS -BUILT POND DETAILS 6 0 SWM-1A AS -BUILT FOREBAY REFURBISHMENT Z SWM-2 AS -BUILT BIORETENTION DETAILS SWM-4 I SWM-6 OVERALL DRAINAGE AS -BUILT O 11`Oa SWM-5A - SWM-5E AS -BUILT STORM PROFILES SWM -9 AS -BUILT INLET DRAINAGE AREA MAP q� o N cn "Zt U Co ti Cq ON LLJ Z (j J E- Co 0 4 �UT/4� N o N 3 C w N L / V a SURVEY NOTES: eFFpRE �o'� t. BENCHMARKS ARE PROVIDED ALONG THE 5TH STREET MEDIAN. 2. DATUM AS FOLLOWS. BEFORE YOU DIG GALL o HORIZONTAL — NAD 83 (GRID NORTH VIRGINIA STATE PLANE, SOUTH ZONE) „ r, VERTICAL — NAVD 88 PROTECT YOURSELF, GIVE THREE 3. AS —BUILT SURVEY DATA PROVIDED BY ROUDABUSH, GALE do ASSOCIATES, INC. WORKING DAYS NOTICE L : f- fEXISTING POND RISER r• r IN- t f • • • iI:3l (2) PROPOSED 18" ORIFICE CREST 0 -,•- I � 1 • ; �� - ,,, retlLi%kl • INV. ELEVATION 400750-.= 7XISTING AND PROPOSED APPROVED EQUAL. (2) EXISTING 15" ORIFICE MAINTAIN INV. ELEVATION EXISTING RISER 396.50. PROVIDE (2) AND OUTFALL LNG&jgTEgEp SAFET* PLASTIC SOLUTIONS PIPE J f • i APPROVED EQUAL.1 • 1 .. Ll��r 01 _ 1 cRi:9bY:? PROPOSED 0 391.00-394.00 OUT iIbi1L! MEMNON?'@ .f pig av till 11 I .\ I y i \ \ f, �♦ ' �}� ieef� rely o-C, pxAo iep ';- s� +�p�� ♦�♦ . ,•s . fir. Y � 4 l f } �o L L i 1 • t .�� � �! a �1. �, • L} •.ae, s •.,1 .. ..-G 1r� 1 �� l� •!� � \ Q y7+« « .. ,.:r' :fir ..va.,gp,'a�frreeiif 1 .�;, `�1��:.�4 :±`ay.�`+i �isriy�i. ��Y•`rass�ii C•e �e a+ee•+.. F� wi see «' �� �� ' e+er"t�`�+re+ f�Sr•IrNeE1«•�,�#• t 1� 1N7 �l'�'°�"• ►��e� Pjs�� j "•�g►M. ,� , • • • ,3.S�jt j / , .. P �II/ �ie;�.�, , , � ice, ,• ej•�� ` � �~.r.../ _ ram: �F--< �•�'� rx, T: �:� .r,: 4 - s •iteh� e i rY • z` RP., '111111111 I t`\.100%10` 0_yr.mpg� . SFA-z aye afr �` + o � +'.r i ! c ♦iA 1p° <if "�N�"��6':•rtrp> • i��SP,► a� a Erb +sra r�•r �I1I�,rt I : S ♦ , ii�t"t• `. , , s . y r. .► is � ..rr � s•,�•z���ti ,,j, , ,erg, {`yam ..��,��•- _ t >�%0%401 4 �Nq gg LEGEND EXISTING CONTOUR PROPOSED kSBUILT i Wet Pond #1(Ex. Riser) VA DEQ StormWater Desgin Specification No,14 (Level 1) Design by: SNR Checked by: MMM Date: 8/4/2015 County/City: Albemarle Runoff RatluT ().()aLevel 1 data input cells ctlon Credit Target Rainfall Event 1.00 inchas�� calw1 incells constant values BMP Drainage Area Summary (Acres) Landcover Type AoIIs BSoiis CSoils DSoils Totals Landcover Rv Impervious 000 0.00 5.18 0.00 5.18 0.95 _ Managed __.._ Forest/Open Space 000� 0.00 0.00 6.00 5.64 0.36 0.00 0,00 564 0.3b 022 0.04 7orals Rv Coefficients _ Asoils 85oils CSoils DSoils Forest/Open Space D 02 0 03 0.04 0.05 Managed Turf 0.15 020 0.22 025 impervious Cover 0.95 0.95 095 0 95 J Determine Required Minimum Surface Area Mini Maximum Surface Area Sur#use Area Provided 14 610 ft' 9#2� ft' n Dralna a Area]Recmnmended [3% of Contributing Drainage Areal ""Recommended Ol. Surface Araa Rrovided Meets Dell n Regmrrments - � Determine Provided Treatment Volume ___.._. .......... _.._.... ....._. ._ .. ..-_ .. ........ __.-___. .. ... _.___ .., _.__.___-_ .. Elevation Area Al+A2+sgr(Al A2) Volume Volume Sum Volume Sum if I) ft') _(fi) (it))(fill W) HOCKENC _.- 391.06_-- -8yi•-® __..-..,._�r9r.H® j-t56a® 1 }}B;`i. 392 00 fi;3GrF 'f9-}86 393.00 394 395 00 {r968 ?-i8S •H>-7'}} 26;512 ,., 'tTi6661 ' _._ 34o-2e ® 396.58 .. 8',,31 Determine Required Treatment Volume Volume from Upstream RR Runoff Remaining Runoff Prac Reductian Comments Practice Volume (ft ft' ft' Impervious Area 3862 0 17863 Bioretention 1 & 2 Turf Area 784 0 4504 8ioretention 1 & 2 Tv { 22,367{ir (100"11v*A/12) volume reduced by an upstream BMP 'TV provided OK Treatment Volume Provided Meets Design Requirements - Determine Provided Forbay, Volume _ Elevation (ft)(fill Area Al+A]+sgr(At"A2) (fill Volume Volume Sum {(t' (FI') Volume Sum (vd' _._ T - __- {r6z"T }9 75 23428 8}f9 aA,65y '2'783'480 398.00 486h36 -6 i35- i9Q41- -1.94 . -8,220 04,464 471;16--... . .. __.. _. __. Determine. Required Forbay Volume Target Rainfall Event 025 inch e Comments iinperaous Acerige 518 -pA�cres F-- -- ForhayVolumeRequlrad --- - 4,701 --- fr' ---- _- -_- (025/12`A ,,�"43560j Forbay Volume Provided OK - Forbay Volume Provided Meets Design Requirements [4 6 reet in Depth] Forbay Depth 6.00 it OK- Forbay Depth Provided Meets Design Requirements Determine Required Geomerty Length of Shortest Flow Path 320 If Comments Overall Length 415 If - I[Shorlest Flow Path / Overall Length) > 0.5 - Ratio SFP/ Overall Length 0.77 umtlCsS OK - Geometry Provided Meets Design Requirements length 145 If Width 115 if (LanglhJ Width) 22 length/ Width 126 umtless DOES NOT MEET DESIGN REQUIREMENTS **Existing Conidt onM° Determine Acceptable Water Depth Avg Design Depth 102 in is Design Requirements 5ummertvap Rale B m [ET] (DP>ET+INF+RES MBj MonthlyinfdtrationLoss _ _ 7 Ile JINFJ _- Reservoiraf Water for FS Measured 3ase Flow Rafe 24 0 in in (MB] _ 0 cfs Qft/s' ` 2.597x6 (12"/!t /SA of and ft�) EMERGENCY SPILLWAY N. T.S. -CREST OF EXISTING VDOT EC-3 / BERM Q 408.00 LINING _ -CREST OF EMERGENCY J W ¢ U Zz Q J � W W W a �> W W O z N O H W ^ _ W Q J_ m m L Q U) 01) N o 2 U g S 00 r W W Y �_ z Y <i DD Q z i ¢ 00 o W U U �T1IA It"00 Do O ;:ft V)rn F a � z\" uj Q. J Cr J > MO �- W CO O � N 'CL`CL � J o J ill a ro o U S C IRA JIM •��� s�'Wllm ICI • • I�� �\ 69.7 CY OF VDOT EC - CLASS I, RIP -RA \ 1.5' DEPT \(TO BE PLACED OVE \ \ FILTER FABRI( m:. f r T q S ♦ ', I�III 4 0 . �j.. I ram,,, ice. ` < �,���' /� fi J 1;1 �a�•�• �.•�i�I1 �� .►- ►' � � `� � �� '� •� ��` ���, ��:� - _. � `fie._ �\� 1 • •� • • "..��llllllllllllllllll��i,:<����'��� �� Nab MR I -ram � :,,:` ►�♦��. \ ,� .�I�I • A • GEOTEXTILE I FABRIC mI 10YR POND ELE ,T"__,_._.._ _._ .. _ 1 OYR CHANNEL ELEV/ t BOT OF RIP -RAP ELEV;395-G Cal 0+20.00 i 05.0 405.0 10YR PON ELEV. i — I EXISTING GRADE ' GABION BASKETS - _ I BOT ELEV = 315 00 GEOTEXTILE FABRIC 1OYRCHANNEL EL V. - _ 12" CLASS 1, RIP RAP PROPOSED GRADE f UNDERDRAIN / REMOVABLE / ( Q 00 CAP ON UPSTREAM ND NWSE. V, / :7I5 GEOTEXTILE )FABRIC I Friction Method Manning Formula Solve For Normal Depth Input O Roughness Coefficient 0.076 Channel Slope 0.01300 fyft Left Side Slope 2.00 Wit (H;V) Right Side Slope 2,00 fVft (H:V) Bottom Width 1000 it Discharge 37600 ft'/s p t � ro„...-., h M1% f`' /�'l.?Y ✓ /KT" 'rY k. M �✓b �4 � � i Y$A "'d �.i'nf".5d "M ^y 5� v' �'T��'r1„..ax-t.:v^.4�...�ry�3.,',� F^4ss',�r'S�✓.at3w�akv,�� n:�,f!4.'M",�°':+':1. n"��''�YS���^a:'Fs Normal Depth 4.52 ft Flow Area 86.13 ft' Wetted Perimeter 30.22 it Hydraulic Radius 2.85 ft Top Width 28.09 ft Critical Depth 2.89 it Critical Slope 0.07496 ft/ft Velocity 4.37 fJs Velocity Head 0.30 ft Specific Energy C82 ft Froude Number 0.44 Flow Type Subcntical LEGEND EXISTING _ CONTOUR PROPOSED _ CONTOUR ASBUILT CONTOUR z O 111 tY z a Q o N W< i � r Z w a U_) U f- z m Q z0 a w� > U_ W W w W O WQ U Q U) W in w = w¢ o �w LL. Q F_ J m UNDERDRAIN NOTES: t 1. ALL PIPING WITHIN THE UNDERDRAIN SYSTEM SHALL HAVE A U) MINIMUM SLOPE OF 0.5% AND SHALL BE CONSTRUCTED OF N Q SCHEDULE 40 OR SR35 SMOOTH WALL PVC PIPE. Igo 2. A MINIMUM OF 4 ROWS OF PERFORATIONS SHALL BE PROVIDED AROUND THE DIAMETER OF THE PIPE AND THE PERFORATIONS SHALL w BE PLACED 6-IN ON CENTER WITHIN EACH ROW FOR THE ENTIRE _j 00 LENGTH OF EACH DRAINAGE LATERAL. PERFORATIONS SHALL BE o Iv o 3/8-IN IN DIAMETER. C) 00 N 3. UNDERDDRAIN PIPES SHALL HAVE A MINIMUM OF 12-IN OF STONE ABOVE AND ON EACH SIDE OF THE PIPE. LU LLL1 Y LU Y Q 00 r, JO' tii ~ U W p SECTION 'C' -- - _-' o W 0 0 ° I GEOr�XTtl_L' FABRIC BOT OF RIP -RAP 1-6' I UNDERDRAIN FI FV- -i95100 0 a omz c rn M N LU CV)� �Nco 0. LU CO F= Q o J O � W nl c w 't5 C ro � La n w Section 6. Pollution Prevention Plan. (reference County Code 17-404 and State Regulation 9VAC25-880-70 part H section AA) A. Plan showing pollution activities and prevention practices B. Sources of Pollutants, locations, and prevention practices Issued—10/2014 Stonnwater Pollution Prevention Plan (SWPPP) Albemarle County / \/ -- -- - / _ \. - I I ✓ \\\'III � � /// LIMITS OF I DISTRURBANCE I 123 ' \ III / '.RETIE OPERATIO 'I 1 SPILL KT 1 STATION ' 1 ONCRETE CIEANOUT J' AND WASH RACK IFUEL & MATERIALS' \STORAGE, PORTAJOH I I ! I I h TYP. IT U'. FOOTPRINT ROYAL FERN POLL UTTONPRE VENTIONPLAN n HOLE OOTPRINT N� 1 �u 11. law IP t jSOIL EROSION & SEDIMENT CONTROL SYMBOLS SYMBOL NO. TITLE KEY 3,02 CONSTRUCTION ENTRANCE CE ! 3.03 CONSTRUCTION ROAD STABILIZATION CRS A j X —x —x —X — 3.05 SILT FENCE SF 3.07 INLET PROTECTION IP r 3.09 TEMPORARY DIVERSION DIKE DD I TS 3.31 TEMPORARY SEEDING TS - - 3.32 PERMANENT SEEDING PS 3.35 MULCH �. 3.39 DUST CONTROL DC ! LIMITS OF DISTURBANCE NOTE: CONTRACTOR CAN RELOCATE POLLUTION PREVENTION ITEMS, BUT I MUST MARK UP DRAWINGS WITH ! UPDATED LOCATION. LIMITS OF DISTURBANCE TO BE �1 FIELD MARKED WITH WHITE r FLAGS OR WHITE PAINT N u I 1 I 0 'PR M tl TBR RINSE SUPRUt SE CLEANOUT / SH RACKS L STATION 60 120 180 Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures C. Sources of Pollutants continued. Common activities and minimum control and prevention practices Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures Follow Erosion and Sediment Control Clearing, grading, excavating, and on- Land disturbance area Plan. Dispose of clearing debris at stabilized areas acceptable disposal sites. Seed and mulch, or sod within 7 days of land clean' Cover storm drain inlets and use drip pans Paving operations Roads and driveways and absorbentloil dry for all paving machines to limit leaks and spills Direct concrete wash water into a leak - Concrete washout and Current location and detail shown on proof container or leak -proof settling basin cement waste plan that is designed so that no overflows can occur Enclose or cover material storage areas. Mix paint indoors in a containment area or Structure construction, stucco, Structures in a flat unpaved area. Prevent the painting, and cleaning discharge of soaps, solvents, detergents and wash water, paint, form release oils and curing compounds. Water shall be filtered, settled or similarly Dewatering operations Dewatering sites shown on plan treated prior to discharge as shown on ]an. Designated areas for material delivery and Material delivery and storage Designated area shown on plan storage. Placed near construction entrances, away from waterways and drainage paths Material use during building process Building areas Follow manufacturer's instructions.MSDS's attached. Waste collection area will not receive a substantial amount of runoff from upland areas and does not drain directly to a waterway. Containers have lids covered Issued—10/2014 Stotmwater Pollution Prevention Plan (SWPPP) Albemarle County Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures Solid waste disposal Current designated container areas on before periods of rain, or are in a covered plan area. Scheduled collection to prevent overfilling. MATERIALS NOT TO BE BURIED ON -SITE Convenient and well -maintained portable sanitary facilities will be provided, and Sanitary waste Current locations shown on plan located away from waterways or inlets. Such facilities shall be regularly maintained. Apply fertilizers in accordance with Landscaping operations Landscape areas shown on plan manufacturer's recommendations and not during rainfall events To be treated in a sediment basin or better Wash Waters Wash areas shown on plan control as specified on plan. Minimize the discharge of pollutants from equipment and vehicle washing Vehicle and equipment washing Designated areas and details shown on Provide containment and filtering for all plan wash waters per the plan Minimization of exposure to precipitation and stormwater. Minimize the exposure of building materials, budding products, construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste, and other materials present on the site to precipitation and to storrawater. (Identify all non-stormwater discharges to occur on your site. Keep this plan up-to-date with ongoing site changes and inspections. See CGP, 9VAC25-880-70 section E for examples of non-stormwater discharges.) M \VLL�J{Vl 1LL{{q{{.l MlJ{.LLq Discharge Pollutants or Pollutant Location on Site Constituents E. Persons responsible for pollution prevention practices Kyle Redinger Issued—10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Land Striker, LLC. 250 West Main St Ste. 201 Charlottesville, VA 22902 434-409-1929 kvle.red ingerA gmail. com F. Response and reporting practices Minimize discharges from spills and leaks. Minimize the discharge of pollutants from spills and leaks and implement chemical spill and leak prevention and response procedures as follows. To the extent practical, do not store oils, chemicals, or other potential contaminants on site. When storage of potential contaminants is required, provide secondary containment, such as spill berms or spill containment pallets. These should be located within the drainage areas to a sediment trap or sediment basin. Direct concrete wash water into a settling basin, dispose of hardened concrete with other construction waste debris to an appropriate waste facility. Respond to all spills, leaks and discharges as follows. Spills of oil, petroleum products, sanitary wastes, and substances listed under 40 CFR parts 110, 117, and 302 should be cleaned up as soon as possible while protecting worker safety. Construct an earthen dike around any spills on dirt to prevent spreading. If a spill occurs during rainfall, cover it with a tarp or another impermeable cover to prevent contaminating runoff. Do not bury any spills or wash them with water. Maintain a spill kits in a readily accessible location. A spill kit shall consist of a lined drum with bags of universal sorbents in the bottom, accessible without tipping the drum, sorbent socks above the bags, and personal protective equipment on the top. All materials used to remove the contaminants, including any water used to rinse equipment, and all dirt removed must be treated as contaminated. Textiles, such as from coveralls, may be sent to a certified laundry facility. Waste must be disposed of according to the standards of Albemarle County and the Commonwealth of Virginia. Store hazardous materials and wastes in covered containers. Report all spills, leaks and discharges as follows: All spills, leaks, and discharges shall be recorded in the inspection logs. If construction activity results in a discharge of contaminants that may be reasonably expected to enter surface waters, the operator shall notify the Department of Environmental Quality immediately or within 24 hours, and shall submit a written report within five days. For significant spills that cannot be controlled by personnel in the immediate vicinity, notify the local emergency response by dialing 911. Albemarle County must also be notified, and potentially some of the following agencies: the Fire Department, the Public Works Department, the Coast Guard, the Highway Patrol, the County Police Department, Department of Toxic Substances, OSHA, etc. For spills of federal reportable quantities, in conformance with the requirements in 40 CFR parts 110, 119, and 302, the contractor should notify the National Response Center at (800) 424-8802. G. Pollution Prevention Awareness The engineer, project superintendent, and contractor shall have weekly meetings to review on -site conditions and advise contractor of potential risks that should be addressed. Contractor will be responsible for following procedures on a daily basis and applying appropriate waste management and prevention practices to be in compliance with the conditions of the general permit. Employees shall be informed of the danger to nature and to human health of various chemical spills. Section 7. Discharges to impaired waters, surface waters within an applicable TNML wasteload allocation, and exceptional waters. Issued—10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Water discharges into an impaired water: Moores Creek. Moores Creek was listed as impaired due to Benthic- Macroinvertebrate Bioassessments for E-Coli and Fecal Coliforms. Site work shall be in compliance with the following requirements: 1. Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; 2. Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events; and 3. In accordance with Part I B 4 and Part I B 5, inspections shall be conducted as follows: 1. Inspections shall be conducted at a frequency of (i) at least once every four business days or (ii) at least once every five business days and no later than 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the inspection shall be conducted on the next business day; and II. Representative inspections used by utility line installation, pipeline construction, or other similar linear construction activities shall inspect all outfalls discharging to exceptional waters. Section 8. Qualified personnel The following personnel are responsible for inspections; To be determined. Qualified personnel shall have an RLD or other relevant professional license. Contractor will likely serve as Qualified Personell. Contractor shall be selected by Land Striker, LLC. Personnel will be listed here before Land Disturbance Permit is issued. Issued—10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 9. Signed Certification CERTIFICATION "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Owner/Operator Name Company: Title: Signature: Date: Kyle Redinoer Land Striker. LLC. MANAGER U 1 /22/19 Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 10. Delegation of authority. Delegation of Authority I, (name), hereby designate the person or specifically described position below to be a duly authorized representative for the purpose of overseeing compliance with environmental requirements, including the Construction General Permit, at the Royal Fern construction site. The designee is authorized to sign any reports, stormwater pollution prevention plans and all other documents required by the permit. (name of person or position) (company) (address) (city, state, zip) (phone) By signing this authorization, I confirm that I meet the requirements to make such a designation as set forth in the Construction General Permit (CGP), and that the designee above meets the definition of a "duly authored representative". Operator Name: Company: Title: Signature: Date: Issued—10/2014 Stonnwater Pollution Prevention Plan (SWPPP) Albemarle County Section It. General permit copy Issued—10/2014 Stonnwater Pollution Prevention Plan (SWPPP) Albemarle County COMMONWEALTH of VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY General Permit No.: VAR10 Effective Date: July 1, 2019 Expiration Date: June 30, 2024 GENERAL VPDES PERMIT FOR DISCHARGES OF STORMWATER FROM CONSTRUCTION ACTIVITIES AUTHORIZATION TO DISCHARGE UNDER THE VIRGINIA STORMWATER MANAGEMENT PROGRAM AND THE VIRGINIA STORMWATER MANAGEMENT ACT In compliance with the provisions of the Clean Water Act, as amended, and pursuant to the Virginia Stormwater Management Act and regulations adopted pursuant thereto, operators of construction activities are authorized to discharge to surface waters within the boundaries of the Commonwealth of Virginia, except those specifically named in State Water Control Board regulations that prohibit such discharges. The authorized discharge shall be in accordance with the registration statement filed with the Department of Environmental Quality, this cover page, Part I - Discharge Authorization and Special Conditions, Part II - Stormwater Pollution Prevention Plan, and Part III - Conditions Applicable to All VPDES Permits as set forth in this general permit. Construction General Permit Effective July 1, 2019 Page 2 of 26 FOMO 1 DISCHARGE AUTHORIZATION AND SPECIAL CONDITIONS A. Coverage under this general permit. During the period beginning with the date of coverage under this general permit and lasting until the general permit's expiration date, the operator is authorized to discharge stormwater from construction activities. This general permit also authorizes stormwater discharges from support activities (e.g., concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated material disposal areas, borrow areas) located on -site or off -site provided that: a. The support activity is directly related to the construction activity that is required to have general permit coverage for discharges of stormwater from construction activities; b. The support activity is not a commercial operation, nor does it serve multiple unrelated construction activities by different operators; c. The support activity does not operate beyond the completion of the last construction activity it supports; d. The support activity is identified in the registration statement at the time of general permit coverage; e. Appropriate control measures are identified in a stormwater pollution prevention plan and implemented to address the discharges from the support activity areas; and f. All applicable state, federal, and local approvals are obtained for the support activity. B. Limitations on coverage. 1. Post -construction discharges. This general permit does not authorize stormwater discharges that originate from the site after construction activities have been completed and the site, including any support activity sites covered under the general permit registration, has undergone final stabilization. Post -construction industrial stormwater discharges may need to be covered by a separate VPDES permit. Discharges mixed with nonstormwater. This general permit does not authorize discharges that are mixed with sources of nonstormwater, other than those discharges that are identified in Part I E (Authorized nonstormwater discharges) and are in compliance with this general permit. Discharges covered by another state permit. This general permit does not authorize discharges of stormwater from construction activities that have been covered under an individual permit or required to obtain coverage under an alternative general permit. Page 3 of 26 4. Impaired waters and total maximum daily load (TMDL) limitation. Nutrient and sediment impaired waters. Discharges of stormwater from construction activities to surface waters identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or for which a TMDL wasteload allocation has been established and approved prior to the term of this general permit for (i) sediment or a sediment -related parameter (i.e., total suspended solids or turbidity) or (ii) nutrients (i.e., nitrogen or phosphorus) are not eligible for coverage under this general permit unless the operator develops, implements, and maintains a stormwater pollution prevention plan (SWPPP) in accordance with Part II B 5 of this permit that minimizes the pollutants of concern and, when applicable, is consistent with the assumptions and requirements of the approved TMDL wasteload allocations and implements an inspection frequency consistent with Part II G 2 a. Polychlorinated biphenyl (PCB) impaired waters. Discharges of stormwater from construction activities that include the demolition of any structure with at least 10,000 square feet of floor space built or renovated before January 1, 1980, to surface waters identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or for which a TMDL wasteload allocation has been established and approved prior to the term of this general permit for PCB are not eligible for coverage under this general permit unless the operator develops, implements, and maintains a SWPPP in accordance with Part II B 6 of this permit that minimizes the pollutants of concern and, when applicable, is consistent with the assumptions and requirements of the approved TMDL wasteload allocations, and implements an inspection frequency consistent with Part II G 2 a. Exceptional waters limitation. Discharges of stormwater from construction activities not previously covered under the general permit effective on July 1, 2014, to exceptional waters identified in 9VAC25-260-30 A 3 c are not eligible for coverage under this general permit unless the operator develops, implements, and maintains a SWPPP in accordance with Part II B 7 of this permit and implements an inspection frequency consistent with Part 11 G 2 a. 6. There shall be no discharge of floating solids or visible foam in other than trace amounts C. Commingled discharges. Discharges authorized by this general permit may be commingled with other sources of stormwater that are not required to be covered under a state permit, so long as the commingled discharge is in compliance with this general permit. Discharges authorized by a separate state or VPDES permit may be commingled with discharges authorized by this general permit so long as all such discharges comply with all applicable state and VPDES permit requirements. D. Prohibition of nonstormwater discharges. Except as provided in Parts I A 2, 1 C, and I E, all discharges covered by this general permit shall be composed entirely of stormwater associated with construction activities. All other discharges including the following are prohibited: 1. Wastewater from washout of concrete; 2. Wastewater from the washout and cleanout of stucco, paint, form release oils, curing compounds, and other construction materials; Page 4 of 26 3. Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance; 4. Oils, toxic substances, or hazardous substances from spills or other releases; and 5. Soaps, solvents, or detergents used in equipment and vehicle washing. E. Authorized nonstormwater discharges. The following nonstormwater discharges from construction activities are authorized by this general permit when discharged in compliance with this general permit: 1. Discharges from firefighting activities; 2. Fire hydrant flushings; 3. Waters used to wash vehicles or equipment where soaps, solvents, or detergents have not been used and the wash water has been filtered, settled, or similarly treated prior to discharge; 4. Water used to control dust that has been filtered, settled, or similarly treated prior to discharge; 5. Potable water sources, including uncontaminated waterline flushings, managed in a manner to avoid an instream impact; 6. Routine external building wash down where soaps, solvents or detergents have not been used and the wash water has been filtered, settled, or similarly treated prior to discharge; 7. Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (or where all spilled or leaked material has been removed prior to washing); where soaps, solvents, or detergents have not been used; and where the wash water has been filtered, settled, or similarly treated prior to discharge; 8. Uncontaminated air conditioning or compressor condensate; 9. Uncontaminated ground water or spring water; 10. Foundation or footing drains where flows are not contaminated with process materials such as solvents; 11. Uncontaminated excavation dewatering, including dewatering of trenches and excavations that have been filtered, settled, or similarly treated prior to discharge; and 12. Landscape irrigation. F. Termination of general permit coverage. 1. The operator of the construction activity shall submit a notice of termination in accordance with 9VAC25-880-60, unless a registration statement was not required to be submitted in accordance with 9VAC25-880-50 A 1 c or A 2 b for single-family detached residential structures, to the VSMP authority after one or more of the following conditions have been met: Page 5 of 26 a. Necessary permanent control measures included in the SWPPP for the site are in place and functioning effectively and final stabilization has been achieved on all portions of the site for which the operator has operational control. When applicable, long term responsibility and maintenance requirements for permanent control measures shall be recorded in the local land records prior to the submission of a complete and accurate notice of termination and the construction record drawing prepared; b. Another operator has assumed control over all areas of the site that have not been finally stabilized and obtained coverage for the ongoing discharge; c. Coverage under an alternative VPDES or state permit has been obtained; or d. For individual lots in residential construction only, final stabilization as defined in 9VAC25- 880-1 has been completed, including providing written notification to the homeowner and incorporating a copy of the notification and signed certification statement into the SWPPP, and the residence has been transferred to the homeowner. The notice of termination shall be submitted no later than 30 days after one of the above conditions in subdivision 1 of this subsection is met. 3. Termination of authorization to discharge for the conditions set forth in subdivision 1 a of this subsection shall be effective upon notification from the department that the provisions of subdivision 1 a of this subsection have been met or 60 days after submittal of a complete and accurate notice of termination in accordance with 9VAC25-880-60 C, whichever occurs first. 4. Authorization to discharge terminates at midnight on the date that the notice of termination is submitted for the conditions set forth in subdivisions 1 b through 1 d of this subsection unless otherwise notified by the VSMP authority or department. 5. The notice of termination shall be signed in accordance with Part III K of this general permit. G. Water quality protection. 1. The operator shall select, install, implement, and maintain control measures as identified in the SWPPP at the construction site that minimize pollutants in the discharge as necessary to ensure that the operator's discharge does not cause or contribute to an excursion above any applicable water quality standard. If it is determined by the department that the operator's discharges are causing, have reasonable potential to cause, or are contributing to an excursion above any applicable water quality standard, the department, in consultation with the VSMP authority, may take appropriate enforcement action and require the operator to: a. Modify or implement additional control measures in accordance with Part II C to adequately address the identified water quality concerns; b. Submit valid and verifiable data and information that are representative of ambient conditions and indicate that the receiving water is attaining water quality standards; or Page 6 of 26 c. Submit an individual permit application in accordance with 9VAC25-870-410 B 3. All written responses required under this chapter shall include a signed certification consistent with Part III K. MMM STORMWATER POLLUTION PREVENTION PLAN A. Stormwater pollution prevent plan. A stormwater pollution prevention plan (SWPPP) shall be developed prior to the submission of a registration statement and implemented for the construction activity, including any support activity, covered by this general permit. SWPPPs shall be prepared in accordance with good engineering practices. Construction activities that are part of a larger common plan of development or sale and disturb less than one acre may utilize a SWPPP template provided by the department and need not provide a separate stormwater management plan if one has been prepared and implemented for the larger common plan of development or sale. The SWPPP requirements of this general permit may be fulfilled by incorporating by reference other plans such as a spill prevention control and countermeasure (SPCC) plan developed for the site under § 311 of the federal Clean Water Act or best management practices (BMP) programs otherwise required for the facility provided that the incorporated plan meets or exceeds the SWPPP requirements of Part II B. All plans incorporated by reference into the SWPPP become enforceable under this general permit. If a plan incorporated by reference does not contain all of the required elements of the SWPPP, the operator shall develop the missing elements and include them in the SWPPP. 3. Any operator that was authorized to discharge under the general permit effective July 1, 2014, and that intends to continue coverage under this general permit, shall update its stormwater pollution prevention plan to comply with the requirements of this general permit no later than 60 days after the date of coverage under this general permit. B. Contents. The SWPPP shall include the following items: 1. General information. a. A signed copy of the registration statement, if required, for coverage under the general VPDES permit for discharges of stormwater from construction activities; b. Upon receipt, a copy of the notice of coverage under the general VPDES permit for discharges of stormwater from construction activities (i.e., notice of coverage letter); c. Upon receipt, a copy of the general VPDES permit for discharges of stormwater from construction activities; d. A narrative description of the nature of the construction activity, including the function of the project (e.g., low density residential, shopping mall, highway, etc.); e. A legible site plan identifying: Page 7 of 26 (1) Directions of stormwater flow and approximate slopes anticipated after major grading activities; (2) Limits of land disturbance including steep slopes and natural buffers around surface waters that will not be disturbed; (3) Locations of major structural and nonstructural control measures, including sediment basins and traps, perimeter dikes, sediment barriers, and other measures intended to filter, settle, or similarly treat sediment, that will be installed between disturbed areas and the undisturbed vegetated areas in order to increase sediment removal and maximize stormwater infiltration; (4) Locations of surface waters; (5) Locations where concentrated stormwater is discharged; (6) Locations of any support activities, including (i) areas where equipment and vehicle washing, wheel wash water, and other wash water is to occur; (ii) storage areas for chemicals such as acids, fuels, fertilizers, and other lawn care chemicals; (iii) concrete wash out areas; (iv) vehicle fueling and maintenance areas; (v) sanitary waste facilities, including those temporarily placed on the construction site; and (vi) construction waste storage; and (7) When applicable, the location of the on -site rain gauge or the methodology established in consultation with the VSMP authority used to identify measurable storm events for inspection as allowed by Part II G 2 a (1) (ii) or Part II G 2 b (2). Erosion and sediment control plan. a. An erosion and sediment control plan designed and approved in accordance with the Virginia Erosion and Sediment Control Regulations (9VAC25-840), an "agreement in lieu of a plan" as defined in 9VAC25-840-10 from the VESCP authority, or an erosion and sediment control plan prepared in accordance with annual standards and specifications approved by the department. b. All erosion and sediment control plans shall include a statement describing the maintenance responsibilities required for the erosion and sediment controls used. c. An approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion and sediment control plan prepared in accordance with department -approved annual standards and specifications, implemented to: (1) Control the volume and velocity of stormwater runoff within the site to minimize soil erosion; (2) Control stormwater discharges, including peak flow rates and total stormwater volume, to minimize erosion at outlets and to minimize downstream channel and stream bank erosion; Page 8 of 26 (3) Minimize the amount of soil exposed during the construction activity; (4) Minimize the disturbance of steep slopes; (5) Minimize sediment discharges from the site in a manner that addresses (i) the amount, frequency, intensity, and duration of precipitation; (ii) the nature of resulting stormwater runoff; and (iii) soil characteristics, including the range of soil particle sizes present on the site; (6) Provide and maintain natural buffers around surface waters, direct stormwater to vegetated areas to increase sediment removal, and maximize stormwater infiltration, unless infeasible; (7) Minimize soil compaction and, unless infeasible, preserve topsoil; (8) Ensure initiation of stabilization activities, as defined in 9VAC25-880-1, of disturbed areas immediately whenever any clearing, grading, excavating, or other land - disturbing activities have permanently ceased on any portion of the site, or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 days; and (9) Utilize outlet structures that withdraw stormwater from the surface (i.e., above the permanent pool or wet storage water surface elevation), unless infeasible, when discharging from sediment basins or sediment traps. 3. Stormwater management plan. a. Except for those projects identified in Part II B 3 b, a stormwater management plan approved by the VSMP authority as authorized under the Virginia Stormwater Management Program (VSMP) Regulation (9VAC25-870), or an "agreement in lieu of a stormwater management plan" as defined in 9VAC25-870-10 from the VSMP authority, or a stormwater management plan prepared in accordance with annual standards and specifications approved by the department. b. For any operator meeting the conditions of 9VAC25-870-47 B of the VSMP regulation, an approved stormwater management plan is not required. In lieu of an approved stormwater management plan, the SWPPP shall include a description of, and all necessary calculations supporting, all post -construction stormwater management measures that will be installed prior to the completion of the construction process to control pollutants in stormwater discharges after construction operations have been completed. Structural measures should be placed on upland soils to the degree possible. Such measures must be designed and installed in accordance with applicable VESCP authority, VSMP authority, state, and federal requirements, and any necessary permits must be obtained. Pollution prevention plan. A pollution prevention plan that addresses potential pollutant - generating activities that may reasonably be expected to affect the quality of stormwater discharges from the construction activity, including any support activity. The pollution prevention plan shall: a. Identify the potential pollutant -generating activities and the pollutant that is expected to be exposed to stormwater; Page 9 of 26 b. Describe the location where the potential pollutant -generating activities will occur, or if identified on the site plan, reference the site plan; c. Identify all nonstormwater discharges, as authorized in Part I E of this general permit, that are or will be commingled with stormwater discharges from the construction activity, including any applicable support activity; d. Identify the person responsible for implementing the pollution prevention practice or practices for each pollutant -generating activity (if other than the person listed as the qualified personnel); e. Describe the pollution prevention practices and procedures that will be implemented to: (1) Prevent and respond to leaks, spills, and other releases including (i) procedures for expeditiously stopping, containing, and cleaning up spills, leaks, and other releases; and (ii) procedures for reporting leaks, spills, and other releases in accordance with Part III G; (2) Prevent the discharge of spilled and leaked fuels and chemicals from vehicle fueling and maintenance activities (e.g., providing secondary containment such as spill berms, decks, spill containment pallets, providing cover where appropriate, and having spill kits readily available); (3) Prevent the discharge of soaps, solvents, detergents, and wash water from construction materials, including the clean-up of stucco, paint, form release oils, and curing compounds (e.g., providing (i) cover (e.g., plastic sheeting or temporary roofs) to prevent contact with stormwater; (ii) collection and proper disposal in a manner to prevent contact with stormwater; and (iii) a similarly effective means designed to prevent discharge of these pollutants); (4) Minimize the discharge of pollutants from vehicle and equipment washing, wheel wash water, and other types of washing (e.g., locating activities away from surface waters and stormwater inlets or conveyance and directing wash waters to sediment basins or traps, using filtration devices such as filter bags or sand filters, or using similarly effective controls); (5) Direct concrete wash water into a leak -proof container or leak -proof settling basin. The container or basin shall be designed so that no overflows can occur due to inadequate sizing or precipitation. Hardened concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wastes. Liquid concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wash waters and shall not be discharged to surface waters; (6) Minimize the discharge of pollutants from storage, handling, and disposal of construction products, materials, and wastes including (i) building products such as asphalt sealants, copper flashing, roofing materials, adhesives, and concrete admixtures; (ii) pesticides, herbicides, insecticides, fertilizers, and landscape Page 10 of 26 materials; and (iii) construction and domestic wastes such as packaging materials, scrap construction materials, masonry products, timber, pipe and electrical cuttings, plastics, Styrofoam, concrete, and other trash or building materials; (7) Prevent the discharge of fuels, oils, and other petroleum products, hazardous or toxic wastes, waste concrete, and sanitary wastes; (8) Address any other discharge from the potential pollutant -generating activities not addressed above; (9) Minimize the exposure of waste materials to precipitation by closing or covering waste containers during precipitation events and at the end of the business day, or implementing other similarly effective practices. Minimization of exposure is not required in cases where the exposure to precipitation will not result in a discharge of pollutants; and f. Describe procedures for providing pollution prevention awareness of all applicable wastes, including any wash water, disposal practices, and applicable disposal locations of such wastes, to personnel in order to comply with the conditions of this general permit. The operator shall implement the procedures described in the SWPPP. SWPPP requirements for discharges to nutrient and sediment impaired waters. For discharges to surface waters (i) identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or (ii) with an applicable TMDL wasteload allocation established and approved prior to the term of this general permit for sediment for a sediment - related parameter (i.e., total suspended solids or turbidity) or nutrients (i.e., nitrogen or phosphorus), the operator shall: a. Identify the impaired waters, approved TMDLs, and pollutants of concern in the SWPPP; and b. Provide clear direction in the SWPPP that: (1) Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; (2) Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events; and (3) A modified inspection schedule shall be implemented in accordance with Part II G 2 a. SWPPP requirements for discharges to polychlorinated biphenyl (PCB) impaired waters. For discharges from construction activities that include the demolition of any structure with at least 10,000 square feet of floor space built or renovated before January 1, 1980, to surface waters (i) identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or (ii) with an applicable TMDL wasteload allocation established and approved prior to the term of this general permit for PCB, the operator shall: Page 11 of 26 a. Identify the impaired waters, approved TMDLs, and pollutant of concern in the SWPPP; b. Implement the approved erosion and sediment control plan in accordance with Part II B 2; c. Dispose of waste materials in compliance with applicable state, federal, and local requirements; and d. Implement a modified inspection schedule in accordance with Part II G 2 a. 7. SWPPP requirements for discharges to exceptional waters. For discharges to surface waters identified in 9VAC25-260-30 A 3 c as an exceptional water, the operator shall: a. Identify the exceptional surface waters in the SWPPP; and b. Provide clear direction in the SWPPP that: (1) Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; (2) Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events; and (3) A modified inspection schedule shall be implemented in accordance with Part II G 2 a. 8. Identification of qualified personnel. The name, phone number, and qualifications of the qualified personnel conducting inspections required by this general permit. 9. Delegation of authority. The individuals or positions with delegated authority, in accordance with Part III K, to sign inspection reports or modify the SWPPP. 10. SWPPP signature. The SWPPP shall be signed and dated in accordance with Part III K. C. SWPPP amendments, modification, and updates. 1. The operator shall amend the SWPPP whenever there is a change in the design, construction, operation, or maintenance that has a significant effect on the discharge of pollutants to surface waters and that has not been previously addressed in the SWPPP. The SWPPP shall be amended if, during inspections or investigations by the operator's qualified personnel, or by local, state, or federal officials, it is determined that the existing control measures are ineffective in minimizing pollutants in discharges from the construction activity. Revisions to the SWPPP shall include additional or modified control measures designed and implemented to correct problems identified. If approval by the VESCP authority, VSMP authority, or department is necessary for the control measure, revisions to the SWPPP shall be completed no later than seven calendar days following approval. Implementation of these additional or modified control measures shall be accomplished as described in Part II H. Page 12 of 26 3. The SWPPP shall clearly identify the contractors that will implement and maintain each control measure identified in the SWPPP. The SWPPP shall be amended to identify any new contractor that will implement and maintain a control measure. 4. The operator shall update the SWPPP as soon as possible but no later than seven days following any modification to its implementation. All modifications or updates to the SWPPP shall be noted and shall include the following items: a. A record of dates when: (1) Major grading activities occur; (2) Construction activities temporarily or permanently cease on a portion of the site; and (3) Stabilization measures are initiated; b. Documentation of replaced or modified controls where periodic inspections or other information have indicated that the controls have been used inappropriately or incorrectly and were modified; c. Areas that have reached final stabilization and where no further SWPPP or inspection requirements apply; d. All properties that are no longer under the legal control of the operator and the dates on which the operator no longer had legal control over each property; e. The date of any prohibited discharges, the discharge volume released, and what actions were taken to minimize the impact of the release; f. Measures taken to prevent the reoccurrence of any prohibited discharge; and g. Measures taken to address any evidence identified as a result of an inspection required under Part II G. 5. Amendments, modifications, or updates to the SWPPP shall be signed in accordance with Part III K. D. Public notification. Upon commencement of land disturbance, the operator shall post conspicuously a copy of the notice of coverage letter near the main entrance of the construction activity. For linear projects, the operator shall post the notice of coverage letter at a publicly accessible location near an active part of the construction project (e.g., where a pipeline crosses a public road). The operator shall maintain the posted information until termination of general permit coverage as specified in Part I F. E. SWPPP availability. 1. Operators with day-to-day operational control over SWPPP implementation shall have a copy of the SWPPP available at a central location on -site for use by those identified as having responsibilities under the SWPPP whenever they are on the construction site. Page 13 of 26 The operator shall make the SWPPP and all amendments, modifications, and updates available upon request to the department, the VSMP authority, the EPA, the VESCP authority, local government officials, or the operator of a municipal separate storm sewer system receiving discharges from the construction activity. If an on -site location is unavailable to store the SWPPP when no personnel are present, notice of the SWPPP's location shall be posted near the main entrance of the construction site. The operator shall make the SWPPP available for public review in an electronic format or in hard copy. Information for public access to the SWPPP shall be posted and maintained in accordance with Part II D. If not provided electronically, public access to the SWPPP may be arranged upon request at a time and at a publicly accessible location convenient to the operator or his designee but shall be no less than once per month and shall be during normal business hours. Information not required to be contained within the SWPPP by this general permit is not required to be released. F. SWPPP implementation. The operator shall implement the SWPPP and subsequent amendments, modifications, and updates from commencement of land disturbance until termination of general permit coverage as specified in Part I F. All control measures shall be properly maintained in effective operating condition in accordance with good engineering practices and, where applicable, manufacturer specifications. If a site inspection required by Part II G identifies a control measure that is not operating effectively, corrective actions shall be completed as soon as practicable, but no later than seven days after discovery or a longer period as established by the VSMP authority, to maintain the continued effectiveness of the control measures. If site inspections required by Part II G identify an existing control measure that needs to be modified or if an additional or alternative control measure is necessary for any reason, implementation shall be completed prior to the next anticipated measurable storm event. If implementation prior to the next anticipated measurable storm event is impracticable, then additional or alternative control measures shall be implemented as soon as practicable, but no later than seven days after discovery or a longer period as established by the VSMP authority. G. SWPPP Inspections. 1. Personnel responsible for on -site and off -site inspections. Inspections required by this general permit shall be conducted by the qualified personnel identified by the operator in the SWPPP. The operator is responsible for ensuring that the qualified personnel conduct the inspection. 2. Inspection schedule. a. For construction activities that discharge to a surface water identified in Part 11 B 5 and B 6 as impaired or having an approved TMDL or Part I B 7 as exceptional, the following inspection schedule requirements apply: (1) Inspections shall be conducted at a frequency of (i) at least once every four business days or (ii) at least once every five business days and no later than 24 hours following a measurable storm event. In the event that a measurable storm event occurs when Page 14 of 26 there are more than 24 hours between business days, the inspection shall be conducted on the next business day; and (2) Representative inspections as authorized in Part II G 2 d shall not be allowed. b. Except as specified in Part II G 2 a, inspections shall be conducted at a frequency of: (1) At least once every five business days; or (2) At least once every 10 business days and no later than 24 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 24 hours between business days, the inspection shall be conducted on the next business day. c. Where areas have been temporarily stabilized or land -disturbing activities will be suspended due to continuous frozen ground conditions and stormwater discharges are unlikely, the inspection frequency described in Part II G 2 a and 2 b may be reduced to once per month. If weather conditions (such as above freezing temperatures or rain or snow events) make discharges likely, the operator shall immediately resume the regular inspection frequency. d. Except as prohibited in Part 11 G 2 a (2), representative inspections may be utilized for utility line installation, pipeline construction, or other similar linear construction activities provided that: (1) Temporary or permanent soil stabilization has been installed and vehicle access may compromise the temporary or permanent soil stabilization and potentially cause additional land disturbance increasing the potential for erosion; (2) Inspections occur on the same frequency as other construction activities; (3) Control measures are inspected along the construction site 0.25 miles above and below each access point (i.e., where a roadway, undisturbed right-of-way, or other similar feature intersects the construction activity and access does not compromise temporary or permanent soil stabilization); and (4) Inspection locations are provided in the inspection report required by Part II G. e. If adverse weather causes the safety of the inspection personnel to be in jeopardy, the inspection may be delayed until the next business day on which it is safe to perform the inspection. Any time inspections are delayed due to adverse weather conditions, evidence of the adverse weather conditions shall be included in the SWPPP with the dates of occurrence. 3. Inspection requirements. a. As part of the inspection, the qualified personnel shall: (1) Record the date and time of the inspection and, when applicable, the date and rainfall amount of the last measurable storm event; Page 15 of 26 (2) Record the information and a description of any discharges occurring at the time of the inspection or evidence of discharges occurring prior to the inspection; (3) Record any land -disturbing activities that have occurred outside of the approved erosion and sediment control plan; (4) Inspect the following for installation in accordance with the approved erosion and sediment control plan, identification of any maintenance needs, and evaluation of effectiveness in minimizing sediment discharge, including whether the control has been inappropriately or incorrectly used: (a) All perimeter erosion and sediment controls, such as silt fence; (b) Soil stockpiles, when applicable, and borrow areas for stabilization or sediment trapping measures; (c) Completed earthen structures, such as dams, dikes, ditches, and diversions for stabilization and effective impoundment or flow control; (d) Cut and fill slopes; (e) Sediment basins and traps, sediment barriers, and other measures installed to control sediment discharge from stormwater; (f) Temporary or permanent channels, flumes, or other slope drain structures installed to convey concentrated runoff down cut and fill slopes; (g) Storm inlets that have been made operational to ensure that sediment laden stormwater does not enter without first being filtered or similarly treated; and (h) Construction vehicle access routes that intersect or access paved or public roads for minimizing sediment tracking; (5) Inspect areas that have reached final grade or that will remain dormant for more than 14 days to ensure: (a) Initiation of stabilization activities have occurred immediately, as defined in 9VAC25-880-1; and (b) Stabilization activities have been completed within seven days of reaching grade or stopping work; (6) Inspect for evidence that the approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion and sediment control plan prepared in accordance with department -approved annual standards and specifications has not been properly implemented. This includes: Page 16 of 26 (a) Concentrated flows of stormwater in conveyances such as rills, rivulets, or channels that have not been filtered, settled, or similarly treated prior to discharge, or evidence thereof; (b) Sediment laden or turbid flows of stormwater that have not been filtered or settled to remove sediments prior to discharge; (c) Sediment deposition in areas that drain to unprotected stormwater inlets or catch basins that discharge to surface waters. Inlets and catch basins with failing sediment controls due to improper installation, lack of maintenance, or inadequate design are considered unprotected; (d) Sediment deposition on any property (including public and private streets) outside of the construction activity covered by this general permit; (e) Required stabilization has not been initiated or completed or is not effective on portions of the site; (f) Sediment basins without adequate wet or dry storage volume or sediment basins that allow the discharge of stormwater from below the surface of the wet storage portion of the basin; (g) Sediment traps without adequate wet or dry storage or sediment traps that allow the discharge of stormwater from below the surface of the wet storage portion of the trap; and (h) Land disturbance or sediment deposition outside of the approved area to be disturbed; (7) Inspect pollutant generating activities identified in the pollution prevention plan for the proper implementation, maintenance, and effectiveness of the procedures and practices; (8) Identify any pollutant generating activities not identified in the pollution prevention plan; and (9) Identify and document the presence of any evidence of the discharge of pollutants prohibited by this general permit. 4. Inspection report. Each inspection report shall include the following items: a. The date and time of the inspection and, when applicable, the date and rainfall amount of the last measurable storm event; b. Summarized findings of the inspection; c. The locations of prohibited discharges; d. The locations of control measures that require maintenance; Page 17 of 26 e. The locations of control measures that failed to operate as designed or proved inadequate or inappropriate for a particular location; f. The locations where any evidence identified under Part II G 3 a (6) exists; g. The locations where any additional control measure is needed; h. A list of corrective actions required (including any changes to the SWPPP that are necessary) as a result of the inspection or to maintain permit compliance; i. Documentation of any corrective actions required from a previous inspection that have not been implemented; and The date and signature of the qualified personnel and the operator or its duly authorized representative. 5. The inspection report shall be included into the SWPPP no later than four business days after the inspection is complete. The inspection report and any actions taken in accordance with Part II shall be retained by the operator as part of the SWPPP for at least three years from the date that general permit coverage expires or is terminated. The inspection report shall identify any incidents of noncompliance. Where an inspection report does not identify any incidents of noncompliance, the report shall contain a certification that the construction activity is in compliance with the SWPPP and this general permit. The report shall be signed in accordance with Part III K of this general permit. H. Corrective actions. The operator shall implement the corrective actions identified as a result of an inspection as soon as practicable but no later than seven days after discovery or a longer period as approved by the VSMP authority. If approval of a corrective action by a regulatory authority (e.g., VSMP authority, VESCP authority, or the department) is necessary, additional control measures shall be implemented to minimize pollutants in stormwater discharges until such approvals can be obtained. The operator may be required to remove accumulated sediment deposits located outside of the construction activity covered by this general permit as soon as practicable in order to minimize environmental impacts. The operator shall notify the VSMP authority and the department as well as obtain all applicable federal, state, and local authorizations, approvals, and permits prior to the removal of sediments accumulated in surface waters including wetlands. Page 18 of 26 PART III CONDITIONS APPLICABLE TO ALL VPDES PERMITS NOTE: Discharge monitoring is not required for this general permit. If the operator chooses to monitor stormwater discharges or control measures, the operator shall comply with the requirements of subsections A, B, and C, as appropriate. A. Monitoring. 1. Samples and measurements taken for the purpose of monitoring shall be representative of the monitoring activity. Monitoring shall be conducted according to procedures approved under 40 CFR Part 136 or alternative methods approved by the U.S. Environmental Protection Agency, unless other procedures have been specified in this general permit. Analyses performed according to test procedures approved under 40 CFR Part 136 shall be performed by an environmental laboratory certified under regulations adopted by the Department of General Services (1 VAC30-45 or 1 VAC30-46). 3. The operator shall periodically calibrate and perform maintenance procedures on all monitoring and analytical instrumentation at intervals that will ensure accuracy of measurements. B. Records. 1. Monitoring records and reports shall include a. The date, exact place, and time of sampling or measurements; b. The individuals who performed the sampling or measurements; c. The dates and times analyses were performed; d. The individuals who performed the analyses; e. The analytical techniques or methods used; and f. The results of such analyses. 2. The operator shall retain records of all monitoring information, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by this general permit, and records of all data used to complete the registration statement for this general permit, for a period of at least three years from the date of the sample, measurement, report or request for coverage. This period of retention shall be extended automatically during the course of any unresolved litigation regarding the regulated activity or regarding control standards applicable to the operator, or as requested by the board. C. Reporting monitoring results. Page 19 of 26 1. The operator shall update the SWPPP to include the results of the monitoring as may be performed in accordance with this general permit, unless another reporting schedule is specified elsewhere in this general permit. 2. Monitoring results shall be reported on a discharge monitoring report (DMR); on forms provided, approved or specified by the department; or in any format provided that the date, location, parameter, method, and result of the monitoring activity are included. If the operator monitors any pollutant specifically addressed by this general permit more frequently than required by this general permit using test procedures approved under 40 CFR Part 136 or using other test procedures approved by the U.S. Environmental Protection Agency or using procedures specified in this general permit, the results of this monitoring shall be included in the calculation and reporting of the data submitted in the DMR or reporting form specified by the department. 4. Calculations for all limitations which require averaging of measurements shall utilize an arithmetic mean unless otherwise specified in this general permit. D. Duty to provide information. The operator shall furnish, within a reasonable time, any information which the board may request to determine whether cause exists for terminating this general permit coverage or to determine compliance with this general permit. The board, department, EPA, or VSMP authority may require the operator to furnish, upon request, such plans, specifications, and other pertinent information as may be necessary to determine the effect of the wastes from his discharge on the quality of surface waters, or such other information as may be necessary to accomplish the purposes of the CWA and the Virginia Stormwater Management Act. The operator shall also furnish to the board, department, EPA, or VSMP authority, upon request, copies of records required to be kept by this general permit. E. Compliance schedule reports. Reports of compliance or noncompliance with, or any progress reports on, interim and final requirements contained in any compliance schedule of this general permit shall be submitted no later than 14 days following each schedule date. F. Unauthorized stormwater discharges. Pursuant to § 62.1-44.5 of the Code of Virginia, except in compliance with a state permit issued by the department, it shall be unlawful to cause a stormwater discharge from a construction activity. G. Reports of unauthorized discharges. Any operator who discharges or causes or allows a discharge of sewage, industrial waste, other wastes or any noxious or deleterious substance or a hazardous substance or oil in an amount equal to or in excess of a reportable quantity established under either 40 CFR Part 110, 40 CFR Part 117, 40 CFR Part 302, or § 62.1-44.34:19 of the Code of Virginia that occurs during a 24-hour period into or upon surface waters or who discharges or causes or allows a discharge that may reasonably be expected to enter surface waters, shall notify the Department of Environmental Quality of the discharge immediately upon discovery of the discharge, but in no case later than within 24 hours after said discovery. A written report of the unauthorized discharge shall be submitted to the department and the VSMP authority within five days of discovery of the discharge. The written report shall contain: 1. A description of the nature and location of the discharge; 2. The cause of the discharge; Page 20 of 26 3. The date on which the discharge occurred; 4. The length of time that the discharge continued; 5. The volume of the discharge; 6. If the discharge is continuing, how long it is expected to continue; 7. If the discharge is continuing, what the expected total volume of the discharge will be; and Any steps planned or taken to reduce, eliminate and prevent a recurrence of the present discharge or any future discharges not authorized by this general permit. Discharges reportable to the department and the VSMP authority under the immediate reporting requirements of other regulations are exempted from this requirement. H. Reports of unusual or extraordinary discharges. If any unusual or extraordinary discharge including a "bypass" or "upset," as defined in this general permit, should occur from a facility and the discharge enters or could be expected to enter surface waters, the operator shall promptly notify, in no case later than within 24 hours, the department and the VSMP authority by telephone after the discovery of the discharge. This notification shall provide all available details of the incident, including any adverse effects on aquatic life and the known number of fish killed. The operator shall reduce the report to writing and shall submit it to the department and the VSMP authority within five days of discovery of the discharge in accordance with Part III 12. Unusual and extraordinary discharges include any discharge resulting from: 1. Unusual spillage of materials resulting directly or indirectly from processing operations; 2. Breakdown of processing or accessory equipment; 3. Failure or taking out of service of some or all of the facilities; and 4. Flooding or other acts of nature. I. Reports of noncompliance. The operator shall report any noncompliance which may adversely affect surface waters or may endanger public health. An oral report to the department and the VSMP authority shall be provided within 24 hours from the time the operator becomes aware of the circumstances. The following shall be included as information that shall be reported within 24 hours under this subdivision: a. Any unanticipated bypass; and b. Any upset that causes a discharge to surface waters. 2. A written report shall be submitted within five days and shall contain: a. A description of the noncompliance and its cause; Page 21 of 26 b. The period of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to continue; and c. Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance. The department may waive the written report on a case -by -case basis for reports of noncompliance under Part III I if the oral report has been received within 24 hours and no adverse impact on surface waters has been reported. 3. The operator shall report all instances of noncompliance not reported under Part III 1 1 or 2 in writing as part of the SWPPP. The reports shall contain the information listed in Part III 1 2. NOTE: The reports required in Part III G, H and I shall be made to the department and the VSMP authority. Reports may be made by telephone, email, or by fax. For reports outside normal working hours, leaving a recorded message shall fulfill the immediate reporting requirement. For emergencies, the Virginia Department of Emergency Management maintains a 24-hour telephone service at 1-800-468-8892. 4. Where the operator becomes aware of a failure to submit any relevant facts, or submittal of incorrect information in any report, including a registration statement, to the department or the VSMP authority, the operator shall promptly submit such facts or correct information. J. Notice of planned changes. 1. The operator shall give notice to the department and the VSMP authority as soon as possible of any planned physical alterations or additions to the permitted facility or activity. Notice is required only when: a. The operator plans an alteration or addition to any building, structure, facility, or installation that may meet one of the criteria for determining whether a facility is a new source in 9VAC25-870-420; b. The operator plans an alteration or addition that would significantly change the nature or increase the quantity of pollutants discharged. This notification applies to pollutants that are not subject to effluent limitations in this general permit; or 2. The operator shall give advance notice to the department and VSMP authority of any planned changes in the permitted facility or activity, which may result in noncompliance with state permit requirements. K. Signatory requirements. 1. Registration statement. All registration statements shall be signed as follows: a. For a corporation: by a responsible corporate officer. For the purpose of this chapter, a responsible corporate officer means: (i) a president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy -making or decision -making functions for the corporation; or (ii) the manager of one or more manufacturing, production, or operating facilities, provided the Page 22 of 26 manager is authorized to make management decisions that govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for state permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures; b. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or c. For a municipality, state, federal, or other public agency: by either a principal executive officer or ranking elected official. For purposes of this chapter, a principal executive officer of a public agency includes (i) the chief executive officer of the agency or (ii) a senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency. 2. Reports and other information. All reports required by this general permit, including SWPPPs, and other information requested by the board or the department shall be signed by a person described in Part III K 1 or by a duly authorized representative of that person. A person is a duly authorized representative only if: a. The authorization is made in writing by a person described in Part III K 1; b. The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the operator. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and c. The signed and dated written authorization is included in the SWPPP. A copy shall be provided to the department and VSMP authority, if requested. 3. Changes to authorization. If an authorization under Part III K 2 is no longer accurate because a different individual or position has responsibility for the overall operation of the construction activity, a new authorization satisfying the requirements of Part III K 2 shall be submitted to the VSMP authority as the administering entity for the board prior to or together with any reports or information to be signed by an authorized representative. 4. Certification. Any person signing a document under Part II I K 1 or 2 shall make the following certification: "I certify under penalty of law that I have read and understand this document and that this document and all attachments were prepared in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant Page 23 of 26 penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." L. Duty to comply. The operator shall comply with all conditions of this general permit. Any state permit noncompliance constitutes a violation of the Virginia Stormwater Management Act and the Clean Water Act, except that noncompliance with certain provisions of this general permit may constitute a violation of the Virginia Stormwater Management Act but not the Clean Water Act. Permit noncompliance is grounds for enforcement action; for state permit coverage, termination, revocation and reissuance, or modification; or denial of a state permit renewal application. The operator shall comply with effluent standards or prohibitions established under § 307(a) of the Clean Water Act for toxic pollutants within the time provided in the regulations that establish these standards or prohibitions or standards for sewage sludge use or disposal, even if this general permit has not yet been modified to incorporate the requirement. M. Duty to reapply. If the operator wishes to continue an activity regulated by this general permit after the expiration date of this general permit, the operator shall submit a new registration statement at least 60 days before the expiration date of the existing general permit, unless permission for a later date has been granted by the board. The board shall not grant permission for registration statements to be submitted later than the expiration date of the existing general permit. N. Effect of a state permit. This general permit does not convey any property rights in either real or personal property or any exclusive privileges, nor does it authorize any injury to private property or invasion of personal rights, or any infringement of federal, state or local law or regulations. O. State law. Nothing in this general permit shall be construed to preclude the institution of any legal action under, or relieve the operator from any responsibilities, liabilities, or penalties established pursuant to any other state law or regulation or under authority preserved by § 510 of the Clean Water Act. Except as provided in general permit conditions on "bypassing" (Part III U) and "upset' (Part III V), nothing in this general permit shall be construed to relieve the operator from civil and criminal penalties for noncompliance. P. Oil and hazardous substance liability. Nothing in this general permit shall be construed to preclude the institution of any legal action or relieve the operator from any responsibilities, liabilities, or penalties to which the operator is or may be subject under §§ 62.1-44.34:14 through 62.1-44.34:23 of the State Water Control Law or § 311 of the Clean Water Act. Q. Proper operation and maintenance. The operator shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances), which are installed or used by the operator to achieve compliance with the conditions of this general permit. Proper operation and maintenance also includes effective plant performance, adequate funding, adequate staffing, and adequate laboratory and process controls, including appropriate quality assurance procedures. This provision requires the operation of back-up or auxiliary facilities or similar systems, which are installed by the operator only when the operation is necessary to achieve compliance with the conditions of this general permit. R. Disposal of solids or sludges. Solids, sludges or other pollutants removed in the course of treatment or management of pollutants shall be disposed of in a manner so as to prevent any pollutant from such materials from entering surface waters and in compliance with all applicable state and federal laws and regulations. Page 24 of 26 S. Duty to mitigate. The operator shall take all steps to minimize or prevent any discharge in violation of this general permit that has a reasonable likelihood of adversely affecting human health or the environment. T. Need to halt or reduce activity not a defense. It shall not be a defense for an operator in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this general permit. U. Bypass. 1. 'Bypass," as defined in 9VAC25-870-10, means the intentional diversion of waste streams from any portion of a treatment facility. The operator may allow any bypass to occur that does not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to ensure efficient operation. These bypasses are not subject to the provisions of Part III U 2 and 3. 2. Notice. a. Anticipated bypass. If the operator knows in advance of the need for a bypass, the operator shall submit prior notice to the department, if possible at least 10 days before the date of the bypass. b. Unanticipated bypass. The operator shall submit notice of an unanticipated bypass as required in Part III I. 3. Prohibition of bypass. a. Except as provided in Part III U 1, bypass is prohibited, and the board or department may take enforcement action against an operator for bypass unless: (1) Bypass was unavoidable to prevent loss of life, personal injury, or severe property damage. Severe property damage means substantial physical damage to property, damage to the treatment facilities that causes them to become inoperable, or substantial and permanent loss of natural resources that can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production; (2) There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass that occurred during normal periods of equipment downtime or preventive maintenance; and (3) The operator submitted notices as required under Part III U 2. b. The department may approve an anticipated bypass, after considering its adverse effects, if the department determines that it will meet the three conditions listed in Part III U 3 a. Page 25 of 26 V. Upset. 1. An "upset," as defined in 9VAC25-870-10, means an exceptional incident in which there is unintentional and temporary noncompliance with technology -based state permit effluent limitations because of factors beyond the reasonable control of the operator. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation. 2. An upset constitutes an affirmative defense to an action brought for noncompliance with technology -based state permit effluent limitations if the requirements of Part III V 4 are met. A determination made during administrative review of claims that noncompliance was caused by upset, and before an action for noncompliance, is not a final administrative action subject to judicial review. 3. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper operation. 4. An operator who wishes to establish the affirmative defense of upset shall demonstrate, through properly signed, contemporaneous operating logs or other relevant evidence that: a. An upset occurred and that the operator can identify the cause of the upset; b. The permitted facility was at the time being properly operated; c. The operator submitted notice of the upset as required in Part III I; and d. The operator complied with any remedial measures required under Part III S. 5. In any enforcement proceeding, the operator seeking to establish the occurrence of an upset has the burden of proof. W. Inspection and entry. The operator shall allow the department as the board's designee, the VSMP authority, EPA, or an authorized representative of either entity (including an authorized contractor), upon presentation of credentials and other documents as may be required by law to: 1. Enter upon the operator's premises where a regulated facility or activity is located or conducted, or where records shall be kept under the conditions of this general permit; 2. Have access to and copy, at reasonable times, any records that shall be kept under the conditions of this general permit; 3. Inspect and photograph at reasonable times any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this general permit; and 4. Sample or monitor at reasonable times, for the purposes of ensuring state permit compliance or as otherwise authorized by the Clean Water Act or the Virginia Stormwater Management Act, any substances or parameters at any location. Page 26 of 26 For purposes of this section, the time for inspection shall be deemed reasonable during regular business hours, and whenever the facility is discharging. Nothing contained herein shall make an inspection unreasonable during an emergency. X. State permit actions. State permit coverage may be modified, revoked and reissued, or terminated for cause. The filing of a request by the operator for a state permit modification, revocation and reissuance, or termination, or a notification of planned changes or anticipated noncompliance does not stay any state permit condition. Y. Transfer of state permit coverage. 1. State permits are not transferable to any person except after notice to the department. Except as provided in Part III Y 2, a state permit may be transferred by the operator to a new operator only if the state permit has been modified or revoked and reissued, or a minor modification made, to identify the new operator and incorporate such other requirements as may be necessary under the Virginia Stormwater Management Act and the Clean Water Act. As an alternative to transfers under Part III Y 1, this state permit may be automatically transferred to a new operator if: a. The current operator notifies the department at least 30 days in advance of the proposed transfer of the title to the facility or property; b. The notice includes a written agreement between the existing and new operators containing a specific date for transfer of state permit responsibility, coverage, and liability between them; and c. The department does not notify the existing operator and the proposed new operator of its intent to modify or revoke and reissue the state permit. If this notice is not received, the transfer is effective on the date specified in the agreement mentioned in Part III Y 2 b. For ongoing construction activity involving a change of operator, the new operator shall accept and maintain the existing SWPPP, or prepare and implement a new SWPPP prior to taking over operations at the site. Z. Severability. The provisions of this general permit are severable, and if any provision of this general permit or the application of any provision of this state permit to any circumstance, is held invalid, the application of such provision to other circumstances and the remainder of this general permit shall not be affected thereby. Section 12. Inspection logs Issued—10/2014 Stonnwater Pollution Prevention Plan (SWPPP) Albemarle County Roval Fern SWPPP Gradinq Loq Inspection: Date Time Instructions: Fill out this sheet as grading events occur. Record grading events and their respective locations on this log. Summary: Event on record: Locations on Site: • Major Grading Activities: • Construction Activities Cease: o Temporarily: o Permanently: • Stabilization Measures Initiated: • Other Grading Activity Notes: Inspector Signature Date Operator Signature Date Royal Fern SWPPP Inspection Log Inspection: Last Rainfall: Date Time Date Rainfall Amount Summary (requirements on back of sheet): Locations of: • Prohibited discharges • Controls needing maintenance • Failed controls: Evidence that ESCP has not been properly implemented: • Additional measures needed: Corrective actions required: Unimplemented corrective actions from previous inspection: Inspector Signature Date Operator Signature Date "If this report does not identify any incidents of non-compliance, I certify that the construction activity is in compliance with the SWPPP and Construction General Permit." Inspections shall be completed at least once every 5 business days and no later than 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the inspection shall be conducted on the next business day. Representative inspections used by utility line installation, pipeline construction, or other similar linear construction activities shall inspect all outfalls discharging to exceptional waters. Where an inspection report does not identify any incidents of non-compliance, the report shall contain a certification that the construction activity is in compliance with the SWPPP and general permit. Inspection requirements: Describe discharges at time of inspection Record land -disturbing activities outside approved ESOP Inspect proper installation, maintenance needs, and effectiveness of: — Perimeter controls, such as silt fence — Soil stockpiles and borrow areas — Completed earthen structures (dams, dikes, ditches, diversions, etc.) — Cut and fill slopes — Sediment basins and traps, sediment barriers, etc. — Channels, flumes, slope drains, etc. — Operational storm inlets — Construction vehicle access routes Areas at final grade or to remain dormant for more than 14 days: — Initiate stabilization activities — Complete stabilization activities within 7 days of stopping work Evidence that ESCP has not been properly implemented: — Concentrated flows of stormwater in conveyances such as rills, rivulets or channels that have not been filtered, settled, or similarly treated prior to discharge, or evidence thereof; — Sediment laden or turbid flows of stormwater that have not been filtered or settled to remove sediments prior to discharge; — Sediment deposition in areas that drain to unprotected stormwater inlets or catch basins that discharge to surface waters. Inlets and catch basins with failing sediments controls due to improper installation, lack of maintenance, or inadequate design are considered unprotected; — Sediment deposition on any property (including public and private streets) outside of the construction activity covered by this general permit; — Required stabilization has not been initiated or completed on portions of the site; — Sediment basins without adequate wet or dry storage volume or sediment basins that allow the discharge of stormwater from below the surface of the wet storage portion of the basin; — Sediment traps without adequate wet or dry storage or sedimenttraps that allow the discharge of stormwater from below the surface of the wet storage portion of the trap; and — Land disturbance outside of the approved area to be disturbed Pollutant generating activities from PPP: implementation, maintenance, and effectiveness Pollutant generating activities not identified in PPP