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HomeMy WebLinkAboutWPO201300069 Calculations 2013-11-1110+00 10 +50 PROFILE VIEW: NEW STORM 8.1 2 REVISED CALCULATIONS PER STORM DRAIN REVISIONS SAR 1 2-6-14 1 �GLI:I<I��I.1T� H op �f O ass G TONAL e ENGME— SURVEYORS PLANNERS ASSOCIATES r�: 3iucow ens: 3aaamo .�.-. am. DESIGNED BY: rDe PROJECT: STONEFIELD BLOCKS F & G FINAL SITE PLAN ALBEMARLE COUNTY VA SET REV. NO. 3 DRAWING NUMBER: C -22 DRAWN BY: REG/Ta Boom" _ TITLE STORM DRAIN CALCULATIONS . E. _ �c3m�mm��mm0�mmm� a�a�wwey�cv DIHR BY: HFIN SHEET NUMBER: 22 of 36 ®Om���mOm________ _u__u_ WWA NUMBER: 213042.04 FILE NAME: 304204C— SWM -2.dwg DISCIPLINE: CIVIL ` SCALE: H: 1 -60' V.. 1 A DATE: 1 1/7/13 NO. SHEET REVISION BY DATE N0, SHEET REVISION BY DATE _ ®__._SEEM e =o = =e . ____ . !:P=L�_._ .o moo ®o�__._._ .............._..o� m�� _ __ _______________________________ _ mom m mm®ommom®mm________ ® _ ..............___._ 10+00 10 +50 PROFILE VIEW: NEW STORM 8.1 2 REVISED CALCULATIONS PER STORM DRAIN REVISIONS SAR 1 2-6-14 1 �GLI:I<I��I.1T� H op �f O ass G TONAL e ENGME— SURVEYORS PLANNERS ASSOCIATES r�: 3iucow ens: 3aaamo .�.-. am. DESIGNED BY: rDe PROJECT: STONEFIELD BLOCKS F & G FINAL SITE PLAN ALBEMARLE COUNTY VA SET REV. NO. 3 DRAWING NUMBER: C -22 DRAWN BY: REG/Ta Boom" _ TITLE STORM DRAIN CALCULATIONS . E. _ a�a�wwey�cv DIHR BY: HFIN SHEET NUMBER: 22 of 36 _u__u_ WWA NUMBER: 213042.04 FILE NAME: 304204C— SWM -2.dwg DISCIPLINE: CIVIL ` SCALE: H: 1 -60' V.. 1 A DATE: 1 1/7/13 NO. SHEET REVISION BY DATE N0, SHEET REVISION BY DATE _ ®__._SEEM e =o = =e . ____ . !:P=L�_._ m�� 10+00 10 +50 PROFILE VIEW: NEW STORM 8.1 2 REVISED CALCULATIONS PER STORM DRAIN REVISIONS SAR 1 2-6-14 1 �GLI:I<I��I.1T� H op �f O ass G TONAL e ENGME— SURVEYORS PLANNERS ASSOCIATES r�: 3iucow ens: 3aaamo .�.-. am. DESIGNED BY: rDe PROJECT: STONEFIELD BLOCKS F & G FINAL SITE PLAN ALBEMARLE COUNTY VA SET REV. NO. 3 DRAWING NUMBER: C -22 DRAWN BY: REG/Ta Boom" _ TITLE STORM DRAIN CALCULATIONS . E. _ a�a�wwey�cv DIHR BY: HFIN SHEET NUMBER: 22 of 36 _u__u_ WWA NUMBER: 213042.04 FILE NAME: 304204C— SWM -2.dwg DISCIPLINE: CIVIL ` SCALE: H: 1 -60' V.. 1 A DATE: 1 1/7/13 NO. SHEET REVISION BY DATE N0, SHEET REVISION BY DATE _ ®__._SEEM e =o = =e . ____ . !:P=L�_._ 10+00 10 +50 PROFILE VIEW: NEW STORM 8.1 2 REVISED CALCULATIONS PER STORM DRAIN REVISIONS SAR 1 2-6-14 1 1 H op �f O ass G TONAL e ENGME— SURVEYORS PLANNERS ASSOCIATES r�: 3iucow ens: 3aaamo .�.-. am. DESIGNED BY: rDe PROJECT: STONEFIELD BLOCKS F & G FINAL SITE PLAN ALBEMARLE COUNTY VA SET REV. NO. 3 DRAWING NUMBER: C -22 DRAWN BY: REG/Ta TITLE STORM DRAIN CALCULATIONS DIHR BY: HFIN SHEET NUMBER: 22 of 36 WWA NUMBER: 213042.04 FILE NAME: 304204C— SWM -2.dwg DISCIPLINE: CIVIL ` SCALE: H: 1 -60' V.. 1 A DATE: 1 1/7/13 NO. SHEET REVISION BY DATE N0, SHEET REVISION BY DATE FILTERRA h. 0111119 YvQ CURB INLET CROWNED FLUME TOWARDS FILTERRA THROAT o RV meanmrwfo.alncietd, Rv=0.05 +0.009(1) PVC OutFall (in.) m PLAN VIEW ELEVAMT W STAN DARD To SE DEPRESSED GUTTER 01) THAN ELEV'B' iv�T GUTTER FLOW D CURER AT RL7ERRA BYPASS CURB INLET PENING (TYP) ilOWL11R NV'A' FLOwUNE lLlV H• ELEVATION VIEW INTERLOCKING FILTERRA UNIT STORM ATER STRU CTURE jover UYP) N (Er p d�- SECTIONS VIEWS OF FILTERRA IN TYPICAL FLUME APPLICATIONS UNDERORAIN SYSfEN <J-s") BY 'ENICA6T toaWt CROSS SECTION MODIFOOKpS OF DRAWINGS ARE ONLY PERMITTED BY WR(REN AUi110PoZA1gN FROM FILTERRA STANDARD 90• NOSING oME: 07 -07 -06 M FLP -2 14.53 UPON REQUEST) FILTERMS TYPICAL FLOWLINE d lAi1 /LSIJAS�QLI:iJ II® Merl C pollutant cancentiatian, mglt or W. Initial phosphorus AND OULET PIPE RELATIONSHIP STORMWATER NARRATIVE STORMWATER DETENTION FOR THE IMPROVEMENTS PROPOSED WITH THIS SITE PLAN WILL BE PROVIDED BY THE PERMANENT NORTH SWM FACILITY. DETAILS FOR THE FACILITY ARE PROVIDED ON THE ALBEMARLE PLACE STORMWATER MANAGEMENT PLAN AMENDMENT NO.3, WPO# 2010- 00023. STORMWATER QUALITY FOR THE IMPROVEMENTS PROPOSED WITH THIS SITE PLAN WILL BE PROVIDED BY THE STORMFILTER AND VORTECHS UNITS TO BE CONSTRUCTED AS PART OF THE ALBEMARLE PLACE STORMWATER MANAGEMENT PLAN AMENDMENT NO.3, WPO# 2010 - 00023, AND THE FILTERRAS PROPOSED AS PART OF THIS PLAN. THE STORMFILTER AND VORTECHS UNITS PROVIDE A POLLUTANT REMOVAL RATE OF 60 %. THE FILTERRAS PROVIDE A PORLLUTANT REMOVAL RATE OF 747. THE REQUIRED POLLUTANT REMOVAL RATE IS 72% FOR BLOCK F AND 25% FOR BLOCK G. (PLEASE REFER TO BMP COMPUTATIONS USING THE SIMPLE METHOD WORKSHEET PROVIDED ON THIS DRAWING.) THE FILTERRAS SHOWN FOR BLOCK F SHALL BE INSTALLED AS PART OF THIS PLAN AND WILL PROVIDE THE REMAINING WATER QUALITY NECESSARY FOR THAT PORTION OF THE STONEFIELD TOWNCENTER DEVELOPMENT. THE STORMFILTER AND VORTECHS UNITS INSTALLED AS PART OF THE PERMANENT NORTH SWM FACILITY PROVIDE THE REQUIRED POLLUTANT REMOVAL FOR BLOCK G AS SHOWN ON THESE PLANS. ADDITIONAL MEASURES MAY BE REQUIRED FOR BLOCK G AS IT IS FURTHER DEVELOPED AND WILL BE SHOWN AS PART OF ANY FUTURE SITE PLANS FOR BLOCK G. FOR THE PURPOSE OF CALCULATING THE POLLUTANT REMOVAL PROVIDED THE SITE HAS BEEN DIVIDED INTO TWO SEPARATE DRAINAGE AREAS. POLLUTANT REMOVAL CALCULATIONS FOR BLOCK F REFERENCE SIMPLE METHOD WORKSHEETS ON THIS DWG AND THE DRAINAGE AREA MAP ON DWG No. C -20. TOTAL DRAINAGE AREA = 14.53 ACRES TOTAL L(PRE) = 20.52 LBS TOTAL L(POST) = 73.11 LBS TOTAL POLLUTANT REMOVAL REQUIRED = 52.59 LBS DRAINAGE AREA TO FILTERRAS = 5.67 ACRES PERCENTAGE PROJECT AREA TREATED BY FILTERRAS = 39.0% FILTERRA POLLUTANT REMOVAL RATE = 74% STORMFILTER & VORTECHS POLLUTANT REMOVAL RATE = 60% POLLUTANT REMOVED BY FILTERRAS (0.390)(73.11 LBS)(0.74) = 21.10 LBS POLLUTANT LOAD REMAINING = 73.11 - 21.10 = 52.01 LBS POLLUTANT REMOVED BY STORMFILTER & VORTECHS (52.01 LBS)(0.60) = 31.21 LBS TOTAL POLLUTANT LOAD REMOVED 31.21 LBS + 21.10 LBS = 52.31 LBS THERE IS 1.71 LBS OF SURPLUS FROM BLOCKS D & E. 52.31 LBS + 1.71 LBS = 54.02 LBS OF POLLUTANTS REMOVED 54.02 LBS > 52.59 LBS POLLUTANT REMOVAL REQUIREMENTS ARE MET FOR THIS AREA. FLUME - SLOPED Structure Number Size (ID ft) CROWNED FLUME TOWARDS FILTERRA THROAT Filterra INV OUT RV meanmrwfo.alncietd, Rv=0.05 +0.009(1) PVC OutFall (in.) m RV mean runoRCoelFcient, Ram 0.05 - 0.0098 12X6 -a- P) small storm correction factor, 0.9 oaLN � •.. um wit A __ - --------- \. � Pi small storm correctim factor, 0.9 ^`worn TNwoAO eox �) i Naovm �) oowaL ' n. ��� A u HNajc i pe.ent imperiousness Tor.mreltu"'llw°wA r5L0PE0iwaTS) se vw1°�i. -__•� I percent lmpeNOUshow. SECTIONS VIEWS OF FILTERRA IN TYPICAL FLUME APPLICATIONS J� 1 SLR- _ M 'Ou- \ CAST m0 PRECAST EOX P anmlal precipitation, 43" in Albemarle SEE BELOW FOR DETAILS NOT SHOWN 'ALL Br anon S (OUDET PIT= _OCAIpN VARIES) T- r / DIRB (Br UmERS) P amual precipitation, 43- in Albemade STANDARD 90• NOSING (OTHER NOSING A,imUma : 14.53 UPON REQUEST) PLAY VIEW GAT PRECAST C pollutant cancentiatian, mglt or W. Initial phosphorus 220.1 TOP sue 4 -6- CLEAR THROAT T - 474.52 OPENING nA CAST RE B II �XUP�LIEL Yes 219.1 ASE No TOP__ (NOT SHOWN' /' A �� IN%wo TOP la- 1 I TOR 4RIlY) tI CARD PNO GImR 476.80 . I I (m cTHERS) 4 as £/ 8X6 RR requiredmmowl, L(wah -fx Luab) & 467.90 GSr- N -PTACE Yes 215.1 DEPRESSED GUTTER AND THRMT OPENING to 12- c c .I m . 6 t2" C.L. 470.26 BY CONTRACTOR) 6 Yes THROAT PROTECTKHN DEVICE - 472.37 14 "M BARS O 12" O.C. BY MIERICAST DO NOT RE40VE -LEAVE TO BE BENT AS NECESSARY BY CONTRACTOR IN PIACE UNTIL SITE IS iL STABILIZED AM O FILTERRA JND_ZLnNN STOV[ PRCv ITCD [Y AMmKAST- -� DRCFACN�SVSiEN 1 4 PRIOR TO INSTALLATION OF FIELD POURED CURET! B ACTNATED "• MULCH PRCr L_O BY AN RMAS w. J 10X6 ..� FILTER NEOtA PROnuE] R uiER (ale 466.00 PRECAST BOX WALL SECTION A -A Ara. IMPORTANT FILTERRA FLDVLINE MUST BE AT A HIGHER DESIGNATION _ `H TNCC GRA-C O'J'fLET GN & SIZE PIPE Area SECTION VIEW ELEVATION THAN BYPASS 6 x a -0 - s - - (t) - - Yes STANDARD FILTERRA THROAT OPENING FLO -1.O( SOP TNLET oft NOpFICA - S OF DRAWINGS ARE ONLY - ERMmEC 472.14 468.47 3Y allm. ARIMR12AlON mold nLRrdD•. DWIINS AJBLE IN TIF FIT£ FLaWT 4 Ni_ 07 -07 -08 BARD FIST -2 NODInsATi(NNS OF DRAWINGS ARE ONLY PERMITTED 8X6 BY sn mEN AU1110RI2ATION FROM FILTERRA ORAWmG AVMIABLE IN TIFF FILE FORMAT. L'l l I'�r/f.J� H PRECAST FILTERRAV UNIT `11iU.1�10D N✓L JS r_ v u® 470.50 LYiseways Length Width ne. subtotal DATE: 02 -27 -06 Bic: CGT -4 W �/���//77//��� ������ .,04,AitIL5UII©l_JC,�_LJLI® - -HR" THROAT OF NING STANDARD CONFIGURATION 474.03 ' ^'����` " -- r*N,a` °gi- AND GUTTER OR FLUME DETAIL .meta asea,iz,° Yes Parking Lots Area 1 Area 2 Area 3 Ama 4 POLLUTANT REMOVAL CALCULATIONS FOR BLOCK G REFERENCE SIMPLE METHOD WORKSHEETS ON THIS DWG AND THE DRAINAGE AREA MAP ON DWG No. C -20. TOTAL DRAINAGE AREA = 6.17 ACRES TOTAL L(PRE) = 8.71 LEIS TOTAL L(POST) = 11.65 LBS TOTAL POLLUTANT REMOVAL REQUIRED = 2.93 LBS STORMFILTER & VORTECHS POLLUTANT REMOVAL RATE = 60% POLLUTANT REMOVED BY STORMFILTER & VORTECHS (11.65 LBS)(0.60) = 6.99 LBS 6.99 LBS - 2.93 LBS = 4.06 LBS THERE IS A 4.06 LBS SURPLUS FOR BLOCK G AS SHOWN. ADDITIONAL MEASURES MAY BE REQUIRED FOR BLOCK G AS IT IS FURTHER DEVELOPED AND WILL BE SHOWN AS PART OF ANY FUTURE SITE PLANS FOR BLOCK G. FILTERRAS FILTERRAS TO BE STANDARD CONFIGURATION WITH RECESSED TOP SLAB. SEE TYPICAL DETAILS AND FILTERRA SCHEDULE ON THIS SHEET. Short Version BMP Computations For Worksheets 2 - 6 Albemarle County Water Protection Ordinatrce: Modified Simple Method Plan: Stonefield Blocks F and G FSP Water Resources Area: Preparer. SAR Date: 9 -20 -13 Project Drainage Area Designation Cewco Site Short Version BMP Computations For Worksheets 2.6 Albemarle County Water Protection Ordinance: Modified Simple Method Plan: Stonefield Blocks F and G FSP Water Resources Area: Preparer. SAR Date: 9 -20 -13 ProXect Drainage Area Designation Black L storm pollutant export In pounds, L = (P(P))RW 21 I C(A272) Structure Number Size (ID ft) L storm pollutant ezpod in pounds, L = (P(P))Wl2I I C(A)2.72 ) Filterra INV OUT RV meanmrwfo.alncietd, Rv=0.05 +0.009(1) PVC OutFall (in.) Recessed Top RV mean runoRCoelFcient, Ram 0.05 - 0.0098 12X6 477.09 P) small storm correction factor, 0.9 471.70 6 Pi small storm correctim factor, 0.9 226.1 8X4 i pe.ent imperiousness 473.34 471.70 I percent lmpeNOUshow. Yes 225.1 P anmlal precipitation, 43" in Albemarle 477.92 474.25 P amual precipitation, 43- in Albemade 4 Yes A project area In acres In subject dainage area. A= 14.53 477.84 A project arcs In acres in subject drainage area, A e GAT 4 C pollutant cancentiatian, mglt or W. Initial phosphorus 220.1 6X4 C pollutant concentralon, mgll or plain target phopphoms 474.52 473.00 f factor applied to RR Yes 219.1 f factor applied to RR 476.80 473.13 V required treatment wli me In cy, 0.5" owr imp,. area = Ag)43560(0.5112y27 4 as V required treatment wlume in cy, 0.5" omr impeW. area = Aflg43560hg&12N27 8X6 RR requiredmmowl, L(wah -fx Luab) 469.32 467.90 RR reidbadismaol, -gI t) -fx L(pre) Yes 215.1 %RR awn -I ea.mL , RR1001-tpcet) 1 474.09 470.26 %RR Rma-I and ... y, RRIML(posb 6 Yes Imperdous Cover Computation (values to feat a square feet) 8X4 472.37 Imperdous Comer Compuation (values in feet 8 all feet) 467.00 1 4 fm 205.1 10X6 em 468.17 466.00 pre -0evalopment Area poetdevelopment Ara. pre-dewlopment Area poN -0ewlopmeat Area Poled Length Width subtotal length Width subtotal Yes Pmed Length Width subtotal Length Width s,Metal 472.14 468.47 466.00 4 Yes R ..ways 8X6 Dmeways Length Width no subtotal Length Wdth no. subtotal 470.50 LYiseways Length Width ne. subtotal Length Widf subotal 192.1 and walks 477.70 474.03 and walks 4 Yes Parking Lots Area 1 Area 2 Area 3 Ama 4 Area 1 Area 2 Area 3 Area 4 477.56 Parking Lots Area 1 Area 2 Area 3 Area 4 Area 1 Area 2 Area 3 Area 4 41 Y 0 6 X 8 475.74 0 470.00 Gobel areas Area 1 Area 2 sublWal Area 1 Area 2 subtotal 158.1 .Growl areas Area 1 Al 2 subtotal Area 1 Area 2 subtotal 470.41 x0.70= x0.70= 1 Yes 10.70= x0.70= Structures Area no. subleml Area no Structures Am. no. subtotal Ate. no. Actlwly -Brazed Pasture 8 Area Area AcOwly- grazed pasture & Area Area yards and cuaiated turf z 0.08 = .0.08. yards and cli iwtetl tun x 0.08 = x 0.08 = Actise crop land Area Ama Active crop land Area Atsa x0.25= x0.25= x0.25= x0.25= CIW Impalmewe Areas Area 1 Area 2 Area 3 Area 1 Area 2 Area 3 Otter Imparmous Areas Area 1 Area 2 Area 3 Area 1 Am.2 Aree 3 541,208 .118 76,880 76,880 Impervlous Comer 0% 85.5% Impervious Cover 0% 28.6% I(Pre) '("so I(P-) Rimen Ru(poe) V Ragaiso V 0.82 835.2 0.31 116.6 New Dovalapment (For Dewlopmmit Areas, existing Impervlous cover < =W-4 New Development (For Osmelopnent Mae, exhaling Im mbalmas eover C t I (pre)' Rv(pm) L(Pm) L(poaq RR %RR M. Type C f I (Phil Rv(Pre) Ltam) L(pos4 RR %RR Ma Type 0.70 1.00 20% 0.23 20.52 73.11 52.M 72% Deelopment Area 0.70 1.00 20% 0.23 8.11 11.65 2.93 25% Development Area 0.35 1.00 0% ,.115 2.23 38.55 34.32 94% Drinking Water Watersheds 0.35 1.00 0% 0.05 0.95 5.82 4.88 84% Drinking Water WMmshed. 040 1.00 1% 0.06 3.01 41.77 311 min. wlues 93% Other Rural Laral 0.40 1.00 1% 0.08 1.28 8.65 5.38 min. wlues 81% Other RUml`antl Redevelopment (For Development Ma 0. a lledn9 Impervlous covers IN Redewlopment (For Mwlop,,W May exlWng Impervlous w- 2OY4 C f I (pre)' R•4pre) LGam) Lhmoq RR %RR Area Type C f I (pre)' Rv(pre) L(pre) Lums0 RR %RR Ma Type 0.70 0.90 20% 0.23 20.52 73.11 54.64 75% Detelopnert Ama 0.70 0.80 20% 0.23 8.71 11.65 3.80 33% Declopmerd Area 0.35 0.85 ,% 0.05 2.23 36.55 34.86 95% Drinking Water Watersheds 0.35 0.85 0% 0.05 0.95. 5.82 5.02 88%. Drilling Water Wateromed. 0.40 0.85 1% 0.03 3.01 41.77 39.22 94% Other Rural Lard 0.40 0.85 1% 0.06 1.28 6.65 5.57 84% Other Rural Lord rev. SO May M02 JMK rev 30 May 2002 MK Filter. Schedule Structure Number Size (ID ft) Filterra TC Filterra INV OUT Bypass Str INV IN PVC OutFall (in.) Recessed Top 226.2 12X6 477.09 473.26 471.70 6 Yes 226.1 8X4 477.01 473.34 471.70 4 Yes 225.1 8X6 477.92 474.25 472.30 4 Yes 221.3 6X6 477.84 474.17 472.00 4 Yes 220.1 6X4 478.19 474.52 473.00 4 Yes 219.1 8X4 476.80 473.13 472.10 4 as 217.1 8X6 472.99 469.32 467.90 4 Yes 215.1 12X6 1 474.09 470.26 466.00 6 Yes 206.1 8X4 472.37 468.70 467.00 1 4 Yes 205.1 10X6 472.00 468.17 466.00 6 Yes 204.1 10 X 6 471.67 467.84 466.00 6 Yes 203.1 8X4 472.14 468.47 466.00 4 Yes 201.1 8X6 476.13 472.46 470.50 4 Yes 192.1 4 X 8 477.70 474.03 470.00 4 Yes 1912 6X8 477.56 473.89 471.60 41 Y 190.1 6 X 8 475.74 472.07 470.00 4 Yes 158.1 12X4 1 474.08 470.41 468.00 4 1 Yes 0erra Filterra Standard Plan Notes filt cinaw -fion & ToawBWn. A. 1M h Unit shall be oessUUCmd w rte lomdose std elevWaw awordi.g m the sizes shown m the bli-il dr.s•f.gs. Auy madif shone be the clmatwn or leladm shag beat the dircctill of ant 1"lVeal by the Enginocr. R. 11'IM1e F \Iles' is sumul Won miliallia m. Us, ap .lab mad be plszd on the Nx caning the 2.4 woad provided, in prevmr any wma nmithm Taro Inn sfte. All intemnl fittings Poppliwl III mti,( be left in place is pe the delhe O. Tm unit anon tic plecM on n compercd rob -Steen tviw a mhtimnln 6 -'awn graven base m art tb. Owl stool, or U' cam Ama in the arcs of mr snit. The amt la tO he Phued m.b (bat the mil and am slab III am Bade or gas ewb in the man or gas Compact undisturbed Mtb -grade owba is Ic 95% of moximam density d -II- 2htof optimum amilwal. Usstitable rite .l be.ow submnde shall be .ple -d 0 ,he site epgiaccta viom M. D. Owlet connwlims sl'RII be 11I aid Aealed to - the approved dmwings with mwli R-inm neav:wry n. mwt situ mmditims -4I-w mgulatulo, E. Once the unit u ant. the insenul wroodeo Revs std protective mesh rover must be left I.... LtcmoYC o* to tempowty wend- sniPpis. bkiela bwhvrr„ dw box wad hop elk. The rota lid dtwM be a.led onto thin box ilowen before wale illiog. wing, non - shrink gmM, butyl rubber or Simla, walapmol soot. no board on top 11 the lid and bw sau111 in the min . Ihnnt must NOT be Tmnnved. Tfr SIRTIllx (Amts mxt In till aurh --J defier) x e rbese -N, Ii.a of as n m. In.1, filling mould be po d In A en hi manner, bringing the appropriate full ownwhil tip h, 5' lifts on an sides. -- seeilom shoe be set f . manna that MU ..it to a wnc.ignt joint. IN all UmMwwca insNllaten of Pilkrma unit shill wrfaTm m AMrM .pie fientim Lal. -..ad- Pr.aiw fr Installellon of Undcrpmwnd Ymcast Utility Stmtturcv", mluvs Ill -ted mhbwi. in .mums roc unamis. R Cwh and gutter ell-wins Iwbme preamrl cball mean thin the gnw -line of the Pilmo ' wpbs u a . Seen, el -fie, tam the A -lice of the bypass Mellon, a .lief (drop ills. emb M or station. IaLarc to comply with this galden.e may cease G, Fah Fil -ii' unit howl rca- iYeadwaate;TTipMitw w msarc sarviYal.rma Hying ,lN. during pimwdsufdrim -whw. This may W achieved through a piped aysrem, gwee flaw w through thence grate. filt0 erra A. Anhatim of the Iif -s " a is performed ONLY by the Somfiel. AVIUser is .:pousible or Piltona° inlet pm.etion and subsequent clean ovt eat, This tames, wail tiro pr jwt si s fully stabilized and droned (fort bmdv.',Tpm gru`x unver, Final paring and -.1 -,mg u,•mpintad), negating the cbm. ol'e, s pomamin M1ing the Filtems system. Care Shull be u,ken daring c.nstnwnpn nm todnmage tl,e prorsctire tmuatntd top pnto. U. All-fill welodes instMiw- of pL m(s) and mblrh II nv uccc5.smy memded hen istwo.w A, Each on-aly Inswged "hes- unit N to be malnmin. by ten "lawltcr, or a S,,,FP appT.YN c;mtracu, tin a minimmt Pennd of I ,Year. The ux,st lx this nmice is to be indadnl in Or Price of earn Till -O m" Pxrondcl inw-m" wrlrwi. areavailablearexhaadI'mi rwaeat. B. Auuml inulwdcd maimcnmmc consists of a maxima. of (2} schcdtded visits. Tuelults mMelsed,kd ..Rlwlyi uIl 1ping vidl alms to ot. up.nw wlineriwd, 11. In. .imn, naltxaml vend.. Time full vinit M1elpr tHu.yvlam, by rumnnngmuisxiru larlil,.,r. C. Each InchId Mdmcame visit conaishofthe followingmsk, I. Filte -a am-P.,hin 2. F.mign debris, ails, mulch a lmsli rcmovnl 3. FiiteTmediaeohuni-- 1-hu-tie as tie Imy 0. Pram health ... I." --di,-- gmreplauemmt ae tie-., 5. ReP.nccmmtilfnwldi 6. Diapasalofallmaionswomcmnlsc itcuv 7. Maimeamil, neords opdnted and stored (repo. model. upon mryean D. Thu hugmtdng no ending bate ill' SP,,I -N .bligAti.n m m the m-lod ,M,m stmt) be delmwinal by the suppliant the lime Ina sYStemsi nw:.iYwPL OIN- st ❑n,mpdy -fify the Supplier of any dmmvIgf m the 11w1(0. wh &A nmalbimhll m integral pert o£thc bi.rctemie, tcehemlogy, �P1T11 OF 012 � l S G SI CNAI. E ENGINEERS SURVEYORS PLANNERS ASSOCIATES P m,mr sm.TeW a YA2.a.e name'. 434.a16M a ,.,rw swe ales net ""`m DESIGNED BT) Joe PROJECT: STONEFIELD BLOCKS F & G FINAL SITE PLAN ALBEMARLE COUNTY, VA SET REV. NO. 3 DRAWN BY: REG/Ta TITLE.- STORMWATER MANAGEMENT CALCULATIONS AND DETAILS DRAWING NUMBER: C -24 DIHR BY: HFW WWA NUMBER: 213042.04 FILE NAME: 304204C_SWM-4.cwg DISCIPLINE: CML SCAE H: I'!=60' V.- Al DATE: 11/7/13 SHEET NUMBER: 24 of 36 N0. SHEET REVISION BY DATE NO. SHEET REVISION BY DATE