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HomeMy WebLinkAboutWPO200800036 Plan - Stormwater 2009-05-01GENERAL CONSTRUCTION NOTES FOR �L EROSION AND SEDIMENT CONTROL PLANS 1. The plan approving authority must be notified one week prior to the pre - construction conference, one week prior to the commencement of land disturbing activity, and one week prior to the final inspection. 2. All erosion and sediment control measures will be constructed and maintained according to minimum standards and specifications of the Virginia Erosion and Sediment Control Handbook and Virginia Regulations VR 625 -02 -00 Erosion and Sediment Control Regulations. ENMORE SUBDIVISION PERIMETER ROAD 3. All erosion and sediment control measures are to be placed prior to or as the first step in clearing. d d'ment control Ian shall be L;IXOSION CONTROL / STORMWATER 4. A copy Of the approved erosion an se i p maintained on the site at all times. 5. Prior to commencing land disturbing activities in areas other than indicated on these plans (including, but not limited to, off -site borrow or wasted areas), the contractor shall submit a supplementary erosion control plan to the owner for review and approval y the plan approving authority. 6. The contractor is responsible for installation of any additional erosion control measures necessary to prevent erosion and sedimentation as determined by the plan approving authority. 7. All disturbed areas are to drain to approved sediment control measures at all times during land disturbing activities and duuring site development until final stabilization is achieved. 8. During dewatering operations, water will be pumped into an approved filtering device. 9. The contractor shall inspect all erosion control measures periodically and after each runoff - producing rainfall event. Any! necessary repairs or cleanup to maintain the effectiveness of the erosion control devices shall be made immediately. 10. All fill material is to be taken from an approved, designated borrow area. ii. All waste material is to be taken an approved waste area. Earth fill shall be inert materials only, free of roots, stumps, wood, rubbish, and other debris. 12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning Ordinance section 5.1.28. 13. All inert materials shall be transported in compliance with section 13 -301 of the Code of Albemarle. 14. Borrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours of 7:00am to 9:OOpm. 15. Borrow, fill or waste activity shall be conducted in a safe manner that maintains lateral support in order to minimize any hazard to persons, physical damage to adjacent land and improvements, and damage to any public street caused by slides, sinking, or collapse. 16. The developer shall reserve the right to install, maintain, remove or convert to permanent stormwater management facilities where applicable, all erosion control measures required by this plan regardless of the sale of any lot, unit, building or other portion of the property. 17. Temporary stabilization shall be temporary seeding and mulching. Seeding is to be at 75 lbs /acre, and in the months of September, to Feh --nary to consist of a 50/50 mix of Annual Ryegrass and Cerreal Winter Rye, or, in March and April to consist of Annual Rye, or May through August o consist of German Millet. Straw mulch is to be applied at 80 lbs /100 sf. Alternatives are subject to approval by the County erosion control inspector. 18. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch. Agricultural grade limestone shall be applied at 90 lbs /1000 sf, incorporated into the top 4 -6 inches of soil. Fertilizer saal' be applied at 4. 1000 lbs /acre and consist of a 10 -20 -10 nutrient mix. Permao-sm. seeding shall be applied at 180 lbs /acre and consist of 95% Kentucky 31 r! Tall Fescue and 0 -5% perennial Ryegras or Kentucky Bluegrass. Straw mulch i to be applied at 80 lbs /100 sf. Alternatives are subject to approval by the County erosion control inspector. 19. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage or clogging to structural measures is to be repair, ?d immediately. Silt traps are to be cleaned when 50% of the wet strorage voluAe is filled with sediment. All seeded areas are to be reseeded when necessar, to achieve a good stand of grass. Silt fence and diversion dikes which are collecting sediment to half their height must be cleaned and repaired immediately. 20. All temporary erosion and sediment control measures are to be removed within 30 days of final site stabilization, when measures are no longer needed, subject to approval by the County erosion control inspector. ADDITIONAL EROSION AND SEDIMENT CONTROL NOTES: * DUST CONTROL Measures for dust control, as stated in section 3.391 of the Virginia Erosion and Sediment Control Handbook, shall be implemented during grading and construction in order to prevent surface and air movement of dust from exposed soil surfaces and to reduce the presence of airborne; substances. * TOPSOIL STOCKPILING All topsoil stockpile locations shall be in areas that are protected by proposed sediment trapping measures. Any other stock :pile areas shall require a plan amendment. * CONSTRUCTION ROAD STABILIZATION All roads will be subject to construction road stabiilization at the discretion of the Erosion Control Officer once the roads have been brought to finish grade. * ALL VEGETATIVE PRACTICES To include permanent and temporary seeding, mulchingl and topsoiling -- All denuded area shall be controlled by vegetative pract:ices as detailed in the narrative. Topsoiling, mulching, and any other measwres to enhance growth and protect against erosion are recommended. * DIVERSION DIKES The diversion dikes shown on this .plan are intended to either: divert silt laden water toward a trap, divert clean water away fProm a trap, or to keep clean water from crossing a disturbed area and thus becoming contaminated. * MS -16. UNDERGROUND UTILITY CONSTRUCTION Underground utilityy lines shall be installed in accdordance with the following standards, in addition to other applicable criteria: A. No more than 500 linear feet of trench may be oppened at one time. B. Excavated material shall be placed on the uphilll side of trenches. C. Effluent from dewatering operations shall be fUltered or passed through an approved sediment trapping device, or both, and discharged in a manner that does not adversely -aMct flowing streams or off -site property. D. Material used for - backfilling trenches shall be properly compacted in order to minimize erosion and to promote stabilization. E. Restabilization shall be accomplished in accordiance with these regulations F. Applicable safety regulations shall be compliedi with. * THIS PLAN REPRESENTS ONLY ONE PART OF THE APPROVED EROSION AND SEDIMENT CONTROL PERMIT. CONTRACTOR MUST ALSO IMPLEMENT THE PRACTICES IN THE APPROVED EROSION AND SEDIMENT CONTROL NARRATIVE TO COMPLY WITH THE PERMIT. CONTRACTOR MUST KEEP AN APPROVED COPY OF THE PLAN AND NARRATIVE ON THE JNB SITE AT ALL TIMES. MANAGEMENTPLAN NECESSARY EROSION CONTROL MEASURES NOT SPECIFICALLY DETAILEV ON PLAN SHEETS 4 - 7 DUST CONTROL - Measures for dust control. as stated in section 3.39 of the Virginia Erosion and Sediment Control Handbook. shall be implemented during grading and construction in order to prevent surface and air movemnt of dust from exposed soil surface and to reduce the presence of airborne substances. TOPSOIL STOCKPILING - All topsoil stockpile locations shall be in areas that are protected by proposed sediment trapping measures. Any other stockpile areas shall require a plan amendment. CONSTRUCTION ROAD STABILIZATION - Construction road stabilization for Farringdon Drive. Limestone Lane and Carroll Creek Road will be sub ect to construction road stabilization at the discretion of the Erosion Control Officer once the roads have men brought to finish grade. ALL VEGETATIVE PRACTICES - including permanent and temporary seeding, mulching and topsoiling -- All denuded area shall be controlled by vegetative ppractices as detailed in the narrative. Topsoiling. mulching, and any other measures to enhance growth and protect against erosion are recommended. GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS 1. All dams and constructed fill to be within 95% of maximum dry density and 2% of optimum moisture content. All fill material to be appproved by a geotechnical engineer. A geotechnical engineer is to b be present during construction of dams. 2. Pipe and riser joints are to be watertight within stormwater management facilities. 3. For temporary sediment traps or basins which are to be converted to permanent stormwater management facilities; conversion is not to take place until the site is stabilized. and permission has been obtained from the County erosion control inspector. LQ LIMIT OF LAND DISTURBANCE AS LISTED IN APPROVED PROFFERS: ZMA # 2006 -016 (note 6A) THE DEVELOPER HAS AGREED TO LIMIT CONSTRUCTION ACTIVITY SUCH THAT NOT MORE THAN 30 ACRES OF THE PROJECT IS DISTURBED AT ANY POINT IN 71ME. FOR THE PURPOSES OF 'HIS PROFFER , DISTURBED AREAS WILL BE DETERMINED BY THE PROGRAM AUTHORITY BASED ON 7HE ACTIVE E &S PLAN WITH ADJUS7MENTS TO INCLUDE ADDITIONAL AREAS OF DISTURBANCE AND EXCLUDE AREAS WHERE PERMANENT STABILIZA 71ON HAS BEEN ESTABLISHED. �l p , , a h a h Fti Subject_ property 44" fib' AW 14 Scale:1 = 1000' + /- TMP 94 -18 EROSION CONTROL MEASURES TEMFORARY STONE & PAVED CE CE CONSTRUCTION ENTRANCES (3.02) C� CONSTRUCTION ROAD CRS STAEILIZA 71ON (3.03) SILT FENCING (3.05) SF X X DUST CONTROL (3.39) DC DC -+► STORM DRAIN IP INLET PROTEC71ON (3.07) Q OUTLET PR07EC71ON (3.08) OP ROCK CHECK DAM (3.20) CD , TEMPORARY SEDIMENT TRAP TEMPORARY R/W DIVERSION RWp `V TEMPORARY DIVERSION DIKE (3.09) e4 _ TEMPORARY DIVERSION DV 4 TOPSOILING (3.30) TO LIMITS OF DISTURBANCE SHEET LEVEL SPREADER LS DRAINAGE DIVIDE 5 Hole i5 V� t FARRIN nAu p CI��STpN� c9FF� 1h 0' 0 �y �- -- to m gA.12g2 cW TTF_ DATUM: &7URCE OF TOPO: James H. Bell Jr., P.C. (U.S.G.S. DATUM) Cate of Photography 02/22/98 D,Le of Compilation 03/12/98 SOURCE OF SURVEY: Roudabush, Gale & Associates (Boundary Survey Performed June 20, 2005.) 0 APPROVE-L, btr the Albemarle Count,w Op O� 2/27M f �PCIFAF a T`rt0`.4t.AS \o.1443B SHELE' T INDEX 'T% BUR SHEET 7 - COVER SHEET SHEET 2 - OVERVIEW(200 Scale) SHEET 3 - SOILS & VEGETATION SHEET 4 - PLAN SHEET(50 Scale) SHEET 5 - PLAN SHEET(50 Scale) SHEET 6 - PLAN SHEET(50 Scale) SHEET ,' -,PLAN SHEET(50 Scale) SHEET 8 - PLAN SHEET(50 Scale) SHEET 9 - EROSION CONTROL DETAILS SHEET 10 - EROSION CONTROL DETAILS SHEET 11 - SEDIMENT TRAPS(20 Scale) SHttl 12 - SILT TRAP 1 DRAINAGE AREAS SHEET 13 - BIOFILTERS (20 Scale) SHEET 14 - BIOFILTERS (20 Scale) SHEET 15 - BIOFIL7ER DETAILS Q:Wpowe111Tmpr*GLEN0AKS 200 VM% .pro 1A Ua z (J) w F� U C14 4L Q� -0 19 X U oc W cc Q Q2 O U W o •1 � ? w ,�y Q UQ o Z 0 w `�'8 J oc Q, � W) W 04 W Cr. � U O u. co t/1 t, 2 w v, o� P4 Orn ('3 Q °' w Lt,l = O 0. w REVISIONS 6/26/08 County Comments � Addressed 12/29/08 County Comments 02/27/09 County Comments 1 DATE April 4, 2008 SCALE CONTOUR INTERVAL I Q Z 0 0 0. ir Z E-- c Z W WWOW C7 W 0 Q Z a: VJ Z LUCCO< 0 aUj020 W 1 L4 1 > Z ar W00Hw o 2 0�: Z cr. 2 W Wa: J 0 V C FILE NUMBER 387 SHEET 1/15 U 4140 ^W NN m Q� 0c U p CC w > - o Q z °v Z ° � o t N 0 j (0 0 o LU LL L? 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Q, 0 cm co cc 0 �- 1= 9 L Z 0� Q 2 0) co 4 z Z 0 oUj x % CL REVISIONS 6/26/08 County Comments Addressed 12/29/08 County Comments 02/27/09 County Comments DATE April 4, 2008 SCALE 50'HORZ CONTOUR INTERVAL 2 FEET z 0 CL Z �- ir < z W w z W Wo UJ 0 < Z< z � Z W 0 0 0 :) < (1) 0 a. 1 0 W LO cc Z LU 17: 0 0 t# < CO) - 0 �� w w cc J 0 0 FC- O) FILE NUMBER 387 SHEET 6/15 U, a �+ W y V 0 N cam a o an to W > o o O c Q 0%( ON W Cc Q' U) cc CO 0 � w0 3 - LL?0cm cc ° a Z � W aW �� T QW = a 4 REVISIONS 6/26/08 County Comments Addressed 12/29/08 County Comments 02/27/09 County Comments JAN. 07, 2010 REVISED LIMESTONE LANE ADDENDUM DATE April 4, 2008 SCALE 1 ° = 50' HORZ CONTOUR INTERVAL 2 FEET ® Z Q g 0 a: c QZ W W W ®W� 2J -O> — Q ~Q� c ZZZ W OQO 02U 1 O 1 � Z�� W OWW cc _ �— � O cl)Q O �Z a: W W cc J O 0 FILE NUMBER 387 SHEET 7/15 1 1 CD c cz d .00 Pro k Stage psed gg Area t'lljol-OPRE 'I YA M ig % lk vn ........... .. .......... ... ... .. ...... .. ..... .... .. ...... ... ........ .. ......... A ... .. ...... ...... ...... ....... .......... .. ..... ...... .............. .. ........ so lur'll 1A SCALE I" = 50' 50 25 0 50 too SCALE IN FEET 711 c) o J. TliONfAS GALE Lic. No, 1443B S L 0*\JpmeINTmproGLENOAKS2008\BASE.pro \1 e 0 U 4 YE cco 0 ,4 L) c\j � CO (),too I a 191, 0 U cc Uj cr. @) > 0 C) z 00 u- QL z 01 w 01 -jz w�o -1� Z � z 0 Cc c� �j01= wo 0 :1 8 LL. w ig C.) cl 1.- 9 cc cc U o Q. 4j 20) L CD Z 0 z Ow % CL REVISIONS 6/26/08 County Comments Addressed 12/29/08 County Comments 02/27/09 County Comments DATE April 4, 2008 SCALE in = SU HORZ CONTOUR INTERVAL 2 FEET z 0 a (. cr Z I-- lz < z W w j 25 W 0 Uj za W cr . z zz Lij 0 <:0, CL 1 0 LLJ L0 Z a: LLJ w it 0 0 cr) - 2 0 Z cc W w a: J 0 cl) FILE NUMBER 387 SHEET 8/15 WS % vn ........... .. .......... ... ... .. ...... .. ..... .... .. ...... ... ........ .. ......... A ... .. ...... ...... ...... ....... .......... .. ..... ...... .............. .. ........ so lur'll 1A SCALE I" = 50' 50 25 0 50 too SCALE IN FEET 711 c) o J. TliONfAS GALE Lic. No, 1443B S L 0*\JpmeINTmproGLENOAKS2008\BASE.pro \1 e 0 U 4 YE cco 0 ,4 L) c\j � CO (),too I a 191, 0 U cc Uj cr. @) > 0 C) z 00 u- QL z 01 w 01 -jz w�o -1� Z � z 0 Cc c� �j01= wo 0 :1 8 LL. w ig C.) cl 1.- 9 cc cc U o Q. 4j 20) L CD Z 0 z Ow % CL REVISIONS 6/26/08 County Comments Addressed 12/29/08 County Comments 02/27/09 County Comments DATE April 4, 2008 SCALE in = SU HORZ CONTOUR INTERVAL 2 FEET z 0 a (. cr Z I-- lz < z W w j 25 W 0 Uj za W cr . z zz Lij 0 <:0, CL 1 0 LLJ L0 Z a: LLJ w it 0 0 cr) - 2 0 Z cc W w a: J 0 cl) FILE NUMBER 387 SHEET 8/15 I, ROCK CHECK DAM 2 ACRES OR LESS OF DRAINAGE AREA:(TYPE A) PIPE OUTLET CONDITIONS n IPE OUTLET TO FLAT REA WITH NO DEFINED HANNEL \� 0 SECTION A-A FILTER CLOTH KEY IN 6"-9"; RECOMMENDED :ice �:�i� .yra►��s��I�•' i FOR ENTIRE ado (MIN.) 'IPE OUTLET TO WELL IEFINED CHANNEL o74 d SECTION A -A FILTER CLOTH KEY IN 6 " -9 "; RECOMMENDED FOR ENTIRE PERIMETER NOTES: 1. APRON LINING MAY BE RIPRAP, GROUTED RIPRAP, GABION BASKET, OR CONCRETE. 2. La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED USING PLATES 3.iB -3 AND 3.18 -4. 3. d m 1.5 TIMES THE MAXIMUM STONE DIAMETER. BUT NOT LESS THAN 6 INCHES. Source: Va. DSWC TEMPORARY SEDIMENT TRAP ORIGINAL GROUND ELEV. 1' VARIABLE _ VARIABLE* 1.0' VD07 # 1 67 CU. YD. /ACRE COARSE AGGREGATE 4' MAX. (EXCAVATED) FILTER CLOTH ORIGINAL FLOW 3' GROUND I ELEV. 2 -10 ACRES OF DRAINAGE AREA: (TYPE B) FILTER CLOTH (OPTIONAL) - (DOWNSTREAM V /IEW) VDOT #1 COARSE AGGREGATE FLOW h4 � �1 3' `''CLASS I RIPRAP SOURCE: VA. DSWC PLATE. 3.20 -1 * SEE PLATE 3.13-1 ** COARSE AGGREGATE CLASS I RIPRAP CROSS SECTION OF OUTLET CLASS I RIPRAP LENGTH (IN FEET) _ 6 X DRAINAGE AREA (IN AC.) DIVERSION / DIKE COARSE AGGREGATE EXCAVATED � I FILTER CLOTH AREA � r * *COARSE AGGREGATE SHALL BE VDOT #3, X357 OR # 5 OUTLET (PE'RSPECTIVE SOURCE: VA. DSWC Q: WpowelltTmprojlGLFNOAKS _20 VIEW) PLATE. 3.13 -2 Plate 3.18 -1 � THIS DIMENSION * PIPE OUTFACE OUTLET PROTECTION DETAIL La (ft W ft) d5O inches La X K -0 (15 ") 2 6 do 6 18 Outlet Pipe 01 W Diameter PLAN VIEW N.T.S. ado OUTLET PRO TEC TION PROVIDE OUTLET PROTECTION PER DETAIL AT EACH PIPE OUTFALL TO THE DIMENSIONS NOTED ABOVE. BASED ON PLATE 3.18.4 (MAXIMUM TAILWATER CONDITION) PIPE OUTFACE Q14 Cfs) La (ft W ft) d5O inches d inches) X K -0 (15 ") 2 6 7 6 18 SEDIMENT TRAP CHART LW * TRAP- BOTTOM TRAP STORAGE DRAINAGE H HO w SILT (HEIGHT (HEIGHT (LENGTH OF DIMENSIONS (BOTTOM NET yOL� AREA TRAP � DAM) OF OUTLET) ( � DAM)TH OVERFLOW HEIR) Ow (Sep Note) EXAREA) ED STORAGE DETH REQUIRED TO TRAP (CF) AC. ! 3.5' 2.5' 3.0' 17.0' 32'X82' 14'X64' 4' 9950 2.7 2 3.0' 2.0' 2.5' 5.0' 22748' 6'X32' 4' 2895 0.8 3 3.0' 2.0' 2.5' 3.0' 18128' 6'X!6' 4' 1448 0.4 4 3.0' 2.0' 2.5' 7.0' 24'X58` 8'X42' 4' 4342 1.2 5 3.5' 2.5' 3.0' l2.0' 30'X72' !2'X54' 4' 7236 2.0 6 3.0' 2.0' 2.5' 5.0' 22'X48' 6'X32' 4' 2895 0.8 7 3.0' 2.0' 2.5' 5.0' 22748" 6732' 4' 2 895 0.8 8 3.0' 2.0' 2.5' 6.0' 24150' 8'X34' 4' 3256 0.9 67 CU. YD./ACRE 9 3.5' 2.5' 3.0' l4.0' 25'X75' 12'X62' 4' 8 SHOWN IN PLAN VIEW A 08tBASE.pra \1 0 U a w ^W N� � Z �(ID m CA 0 Q Cc W °-C U U Z ?o O ao g a:z �Z Q Q 2� v� 0 (r � N >o co W :� co 0 CM � W or a z 9 W aW �� !f� T � �z Q � z CL REVISIONS 6/26/08 County Comments Addressed 12/29/08 County Comments 02/27/09 County Comments DATE April 4, 2008 SCALE CONTOUR INTERVAL < 5 IQ Z O o. � Z Q W H JW 2Q z WWCCW� � 3: �-C3s a: C0 Z Q � W Joz� CL U Q � W W ZWw O O C0 Q 2 03: Z CC 2 W WCc Cf) J o FILE NUMBER 387 SHEET 9115 322 2.3 SHOWN IN PLAN VIEW A 08tBASE.pra \1 0 U a w ^W N� � Z �(ID m CA 0 Q Cc W °-C U U Z ?o O ao g a:z �Z Q Q 2� v� 0 (r � N >o co W :� co 0 CM � W or a z 9 W aW �� !f� T � �z Q � z CL REVISIONS 6/26/08 County Comments Addressed 12/29/08 County Comments 02/27/09 County Comments DATE April 4, 2008 SCALE CONTOUR INTERVAL < 5 IQ Z O o. � Z Q W H JW 2Q z WWCCW� � 3: �-C3s a: C0 Z Q � W Joz� CL U Q � W W ZWw O O C0 Q 2 03: Z CC 2 W WCc Cf) J o FILE NUMBER 387 SHEET 9115 F/ Source: Va. SWCC Plate 3.11 -1 STONE CONSTRUCTION ENTRANCE 70' MI:N. A FILTER CLOTH-- 6" MINI Al SIDE ELEVATION COURSE AGdREGATE B TO SEDIMENT I TRAPPING DEVICE MUST EXTEND FULL WIDTH A VIEW OF INGAES5 AND EGRESS OPERATION EXISTING PAVEMENT 5: 1 MOUNTABLE BERM (OPTIONAL) T 10' MIN. EXISTING PAVEMENT 10' MIN. i VA"11:n {,14f11 SECTION A —A REiNVUHULU UUNUHt I t UMAIN JrAuc N. N. SECTION B —B DIVERSIONS TYPICAL PARABOLIC DIVERSION lox SETTLEMENT -.\ TYPICAL TRAPEZOIDAL DIVERSION lox SETTLEMENT TYPICAL VEE— SHAPED DIVERSION Source: Va. DSWC SOURCE: ADAPTED from 1983 Maryland Standards for Soil erosion and Sediment Control, and Va. DSWC Plate 3.02 -1 � hi Plate 3.12 -1 TEMPORARY DIVERSION DIKE SOURCE: VA. DSWC PLATE 3.09 -11 CONSTRUCTION STONE ASPHALT ACCESS---\ TOP COURSE `-- 6" MIN. 21A AGGREGATE BASE PROFILE 70' MIN. STONE CONSTRUCTION �� O ACCESS --� 2 % * MUST EXTEND FULL WIDTH OF INGRESS AND EGRESS OPERATION ASPHALT PAVED WASHRACK 12' MIN.* 2 % EXISTING PAVEMENT 2 % POSITIVE DRAINAGE A TO SEDIMENT TRAPPING DEVICE PLAN 12' MIN. 2 %- EXISTING PAVEMENT Z)r-u 11UIN H -14 NOTE: A MINIMUM WATER TAP OF 2" IS REQUIRED WITH A MINIMUM WASH HOSE DIAMETER OF 1.5" PAVED WASH RACK N.T.S. _—J S!M!7 14. 11 SPECMC 1' MEMOD OF 1 WHERE BMW FLOWS 9V 911 AND WE= AN 1 91' CeACrff IS NECESSARY TO PREVEW EXCESS= PONDING AROUND THE GRAVEL 1O OR #5 COARSE SOURCE: VA. DSWC NOTE; Farringdon Road Temporary Construction Entrance. Construct Trap at construction entrance at approximate dimension 9'x19' at top of weir, w1weir Length = 1.5' -2'. Maintain as required to direct all wash rack water from construction. A right of way diversion shall be constructed as required to direct all wash water to proposed trap. .... . .. . .. ............ ...... 77- X LWAM PLATE. 5.07 -9 SEDIMENT TRAP 10 DAM ELEV = 374.0 WEIR ELEV = 373.0 o) �H) BOTTOM ELEV = 371.0 DAM WIDTH = 2.0' W) LENGTH OF WEIR = 2.0� (LW) WET STORAGE DEPTH = 2.0 TOTAL STORAGE PROVIDED = 246 cf ti r� OF � 1 TH014AS GALE ® Lic. NO 1443B 4:WpmWRTmpr*GLENOAI( 20081BASE .pro r a U PC U LU 2 0 to o Q. Q'' U O o� ;o -Z Q �o. •. p -j R1 N CO Q wo �LL LL W L� °' Cj=-) 4 zn rn T Z C LU .i. a REVISIONS 6/26/08 County Comments Addressed 12/29/08 County Comments 02/27/09 County Comments DATE April 4, 2008 SCALE CONTOUR INTERVAL Q 0 o a. cc Z�- a: < Z �w w F— ~ J 2 Z W w w awz cc (� S = Q � ) ZZZ w J 0Q 0. 02,0 Q � w� Zxj a: w o�-� W o 0 co)Q 2 0� z a: W W oc J 0 N FILE NUMBER 387 I,r SEDIMEN T TRAP 4 DRAINAGE AREA = 1.2 Ac. STORAGE AREA REQUIRED = 4342 cf DAM ELEV = 366.34 (H WEIR ELEV = 365.0 (Ho) BOTTOM ELEV = 358.0 DAM WIDTH = 3.0' W) LENGTH OF WEIR = 9.0� �LW) WET STORAGE DEPTH = 4.0 TOTAL STORAGE PROVIDED = 5500 cf SEDIMENT TRAP 7 DRAINAGE AREA = 0.8 Ac. STORAGE AREA REQUIRED = 2895 cf DAM ELEV = 356.29 (H WEIR ELEV = 355.0 (Ho BOTTOM ELEV = 349.0 DAM WIDTH = 2.5' LENGTH OF WEIR = �W) 5.0' LW) WET STORAGE DEPTH = 4.0' TOTAL STORAGE PROVIDED = 3120 cf SEDIMENT TRAP DRAINAGE AREA = 2.9 Ac. STORAGE AREA REQUIRED = 11,216 cf DAM ELEV = 368.0 H) WEIR ELEV = 367.0 (Ho) BOTTOM ELEV = 360.5 DAM WIDTH = 3.0' (W) LENGTH OF WEIR = 18.0' (LW) WET STORAGE DEPTH = 4.0' TOTAL STORAGE PROVIDED = 11,224 cf S14 053'101 1 99 SEDIMENT TRAP 5 DRAINAGE AREA = 2.0 Ac. STORAGE AREA REQUIRED = 7236 cf DAM ELEV = 369.0 WEIR ELEV = 368.0 o) �H) BOTTOM ELEV = 363.0 DAM WIDTH = 4.5' (W) LENGTH OF WEIR = 12.0' (LW) WET STORAGE DEPTH = 3.0' 'OTAL STORAGE PROVIDED = 7362cf SEDIMENT TRAP 8 DRAINAGE AREA = 0.9 Ac. STORAGE AREA REQUIRED = 3256 cf DAM ELEV = 302.35 WEIR ELEV = �H� 301.0 ( o BOTTOM ELEV = 295.0 DAM WIDTH = 2.5' LENGTH OF WEIR = �W) 6.0' LW) WET STORAGE DEPTH = 4.0' TOTAL STORAGE PROVIDED = 3664 cf SEDIMENT TRAP 2 DRAINAGE AREA = 0.8 Ac. STORAGE AREA REQUIRED = 2895 cf DAM ELEV = 403.24 (H WEIR ELEV = 402.0 (Ho) BOTTOM ELEV = 396.0 DAM WIDTH = 3.0' W) LENGTH OF WEIR = 5.0 (LW) WET STORAGE DEPTH = 4.0' TOTAL STORAGE PROVIDED = 3120 cf SEDIMENT TRAP 3 DRAINAGE AREA = 0.4Ac. STORAGE AREA REQUIRED = 1447 cf DAM ELEV = 394.18 (H) WEIR ELEV = 393.0 (Ho) BOTTOM ELEV = 387.0 DAM WIDTH = 4.5' LENGTH OF WEIR = �W) 3.0' �LW) WET STORAGE DEPTH = 4.0 TOTAL STORAGE PROVIDED = 2976 cf SEDIMENT TRAP 6 DRAINAGE AREA = 0.8 Ac. STORAGE AREA REQUIRED = 2895 cf DAM ELEV = 348.30 (H WEIR ELEV = 347.0 (Hol� BOTTOM ELEV = 341.0 DAM WIDTH = 3.5' LENGTH OF WEIR = �W) 5.0' LW) WET STORAGE DEPTH = 4.0' TOTAL STORAGE PROVIDED = 3120 cf SEDIMENT TRAP 9 DRAINAGE AREA = 2.3 Ac. STORAGE AREA REQUIRED = 8322 cf DAM ELEV = 296.0 WEIR ELEV = �H) 295.0 Ho) BOTTOM ELEV = 288.5 DAM WIDTH = 3.0',(W) LENGTH OF WEIR = 14.0' (LW) WET STORAGE DEPTH = 4.0' TOTAL STORAGE PROVIDED = 9014 cf '4� NLT -f pF �r s ;v ]. THOMAS GALE ® Lic. No. 1443E a �► O 0:WpowelATmproAGLENOAKS 20081BASE.pro �,/A U a 4w cc U n� N= c� 2 0'D a aj �r K 4 1 0 c U 0 alU >o rL p co co) tq Z o w CC N 04 co wZ �� ICJ1 � LL ? v W aW 00 C) a REVISIONS 6/26/08 County Comments Addressed 12/29/08 County Comments 02/27/09 County Comments DATE June 3, 2008 SCALE in 20' HORZ CONTOUR INTERVAL. 2 FEET 0 z Q <1 o J cf) oa. oc _ z �- ac Q Q z w �- w I- w J � z w Owe (L C�> - zQ� � OzZ W � vQ� a. M L4 I ' �i W zWW O ? �� � a O� z ''w w 2 a: J O V FILE NUMBER 387 U a w 0 ^W N� a a 18 �a ` a er 0cc U p cc w >o a2 qz p cc CO c _' �2 o W Q o Q 1= �3 v, z J N aO Q) (D o� t/1 L LU ? w o rr °' 1-9 W ac Qrn a W W 0 �z O ii A/� . REVISIONS 12/29/08 County Comments 02/27/09 County Comments DATE DEC. 22, 2008 SCALE 1' = 50' HORZ CONTOUR INTERVAL 2 FEET Z Q O o a. C Q Z�- QZ W W --� W g �-- 0 O z W Q �W� Z F- �> Z Q � oc o z� W 0 UQO ii. � J I ' ' al W ,- Z W W XO.OH-� O 1 �Q OS Z oC 2 W F- W Cr. J J O FILE NUMBER 387 SHEET 12/15 r, UNDERDRAIN LAYOUT BIOFILTER 2 1 11k \k PLANTING LAYOUT 1.5' MIN. DAM = 403.24 WEIR = 402.0 LENGTH WEIR = 5' TOP BIOFILTER MIX = 401.0 TOP U.D. GRAVEL = 398.5 10 YEAR HIGH WATER ELEV = 402.14 100 YEAR HIGH WATER ELEV = 402.24 3' DAM TOP WEIR -�— 402.0 \-E-3 : 1 MAX. CROSS — SECTION N.T.S. BIOFILTER 2 PLANT LIST Tree Species (1" min. caliper) Quantity Symbol \� Common Name 1 AR Acer Rubrum Red Maple 1 � Quercus Phellos Willow Oak 1 NS yy ./� ...:. ..... l1 �.. . :.... yy� v j• 4 2 r'`, "� 2 NS Nyssa Sylvatica Black Gum W � a Cc �� � W cc LLB w. ..::.. .:... �p << ... AM 03: O i Zc ::. ..:,. ... 7�. f �r t� r ... ••�v....••4 ..:. ..... ... T.. : � n •f� n 7 77 r RF r r \ UNDERDRAIN LAYOUT BIOFILTER 2 1 11k \k PLANTING LAYOUT 1.5' MIN. DAM = 403.24 WEIR = 402.0 LENGTH WEIR = 5' TOP BIOFILTER MIX = 401.0 TOP U.D. GRAVEL = 398.5 10 YEAR HIGH WATER ELEV = 402.14 100 YEAR HIGH WATER ELEV = 402.24 3' DAM TOP WEIR -�— 402.0 \-E-3 : 1 MAX. CROSS — SECTION N.T.S. BIOFILTER 2 PLANT LIST Tree Species (1" min. caliper) Quantity Symbol Scientific Name Common Name 1 AR Acer Rubrum Red Maple 1 OP Quercus Phellos Willow Oak 1 NS Nyssa Sylvatica Black Gum Shrub Species (3 -4' min. height for planting) Quantity Symbol Scientific Name 3 VC Viburnum Cassinoides; 2 VD Viburnum Dentatum 3 VL Viburnum Lentago Common Name Northern Wild Raisen Arrow -Wood Nannyberry UNDERDRAIN LAYOUT B10FILTER 3 N \. \., ..:... v. BIOFILTER 4 PLANT LIST Tree "Al caliper) Viburnum Cassinoides Quantity Symbol Scientific Name Common Name 1 AR Acer Rubrum Red Maple i QP ...:. ..... l1 �.. . :.... yy� v Willow Oak 2 NS Nyssa Sylvatica Black Gum W � a Cc W cc w. ..::.. .:... �p << ... AM 03: O i Zc ::. ..:,. ... ... ••�v....••4 ..:. ..... ... T.. : PLANTING LAYOUT UNDERDRAIN LAYOUT B10FILTER 4 NI A PLANTING LAYOUT 1.5' MIN. B10FILTER 3 DAM = 394.18 WEIR = 393.0 LENGTH WEIR = 3.0' TOP BIOFILTER MIX = 392.0 TOP U.D. GRAVEL = 389.5 10 YEAR HIGH WATER ELEV = 393.09 100 YEAR HIGH WATER ELEV = 393.18 CROSS — SECTION N.T.S. BIOFILTER 3 PLANT LIST Tree Species (1" min. caliper) Quantity Symbol Scientific Name Common Name 1 AR Acer Rubrum Red Maple i QP Quercus Phellos Willow Oak Shrub Species (3 -4' min. height for planting) SCALE 1" = 20' Quantity Symbol Scientific Name Common Name 20 10 0 20 40 2 VC Viburnum Cassinoides Northern Wild Raisen 2 VD Viburnum Dentatum Arrow -Wood SCALE IN FEET BIOFILTEIR 4 DAM = 3661.34 WEIR = 36+5.0 LENGTH WEIR = 9' TOP BIOFILTER MIX= 36+4.0 TOP U.D. GRAVEL = 360.5 10 YEAR HIGH WATER ELEV = 365;.23 100 YEAR HIGH WATER ELEV = 3641.34 CROSS — SECTION N.T.S. —TOP WEIR 365.0 �-E— 3 :1 MAX. Shrub ;Species (3 -4' min. height for planting) Quanti ty BIOFILTER 4 PLANT LIST Tree Sppecies (1" min. caliper) Viburnum Cassinoides Quantity Symbol Scientific Name Common Name 1 AR Acer Rubrum Red Maple i QP Quercus Phellos Willow Oak 2 NS Nyssa Sylvatica Black Gum Shrub ;Species (3 -4' min. height for planting) Quanti ty Symbol Scienti tic Name Common Name 3 VC Viburnum Cassinoides Northern Wild Raisen 3 VD Viburnum Dentatum Arrow -Wood 5 VL Viburnum Lentago Nannyberry s J. THOMAS GALE �® ® Lic. No. 1443B O: WpoweBlTmp *GLENOAKS_20081BASE.pro \I 09 Ua w � t U "W w = U) � m � �a aD M�1 4' Q r 0 U o aW >o oz oo o Vj J z o W Q o �W O's 00 orr , N 04 o 0 LL 0W1- w EA LZ W0 OTC 4 W �� O0) T O 4 W = 04 REVISIONS 12/29/08 County Comments 02/27/09 County Comments DATE JULY 28, 2008 SCALE 1" =20' CONTOUR INTERVAL 2 FEET FILE NUMBER 387 SHEET 13/15 U)Z Cf)g Z n• �~ P Z J '_ g W Q z W2 a cr) W o: cv (9 W > WZ z a: 03 Qa W � a Cc W cc 03: O Zc J� FILE NUMBER 387 SHEET 13/15 r UNDERDRAIN LAYOUT BIOFILTER 6 PLANTING LAYOUT TOP BIOFIL TER MIX = 346.0- TOP UNDERDRAIN GRAVEL = 343.5 BIOFILTER 6 DAM = 348.30 WEIR = 347.0 LENGTH WEIR = 5' TOP BIOFILTER MIX = 343.5 TOP U.D. GRAVEL = 341.01 10 YEAR HIGH WATER ELEV = 347.21 100 YEAR HIGH WATER ELEV = 347.30 3.5' DAM 1.5' MIN. CROSS- SECTION N.T.S. BIOFILTER 6 PLANT LIST Tree Species (1" min. caliper) -TOP WEIR 347.0 �- 3 : 1 MAX. Quantity Symbol Scientific Name Common Name 1 AR Acer Rubrum Red Maple 1 QP Quercus Phellos Willow Oak 1 NS Nyssa Sylvatica Black Gum Shrub Species (3 -4' min. height for planting) Quantity Symbol Scientific Name Common Name 3 VC Viburnum Cassinoides Northern Wild Raisen 2 VD Viburnum Dentatum Arrow -Wood 2 VL Viburnum Lentago Nannyberry 4� 71 R � • BF -7,r lr \ CJ N r r A; \ t } I ? 1 UNDERDRAIN LAYOUT BIOFILTER 7 PLANTING LAYOUT 1.5' MIN. BIOFILTER 7 DAM = 356.29 WEIR = 355.0 LENGTH WEIR = 5' TOP BIOFILTER MIX = 354.0 TOP U.D. GRAVEL = 351.5 10 YEAR HIGH WATER ELEV = 355.21 100 YEAR HIGH WATER ELEV = 355.29 -TOP WEIR 355.0 �-rt- 3 : 1 MAX. CROSS - SECTION N.T.S. BIOFILTER 7 PLAN Tree Species (1" min. caliper) Quantity Symbol Scientific Name 1 AR Acer Rubrum 1 QP Quercus Phellos 1 NS Nyssa Sylvatica IT LIST Common Name Red Maple Willow Oak Black Gum Shrub Species (3 -4' min. height for planting) UNDERDRAIN LAYOUT BIOFILTER 8 PLANTING LAYOUT BIOFILTER 8 DAM = 302.35 WEIR =301.0 LENGTH WEIR = 6' TOP BIOFILTER MIX = ;300.5 TOP U.D. GRAVEL = 298.0 10 YEAR HIGH WATER ELEV = 3101.23 100 YEAR HIGH WATER ELEV = 3101.35 CROSS- SECTION N.T.S. BIOFILTER 8 PLANT LIST True Species (1" min. caliper) LEVEL SPREADER WITH RIDGID LIP -r-TOP WEIR (SEE DETAIL SHT.14) 301.0 TOP OF 6x6 T �- 3 :1 MAX. I0. = 296.91 0.6' 295.91 j RAVEL 296.31 -"" RIP RAP FILTER rE CHANNEL ■.�•4 NIFTAr. 1.8' 6' 3' ON SiNEK'Y' 14 Quanntity Symbol Scientific Name Common Name 1 AR Acer Rubrum Red Maple 1 OP Quercus Phellos Willow Oak 1 NS Nyssa Sylvatica Black Gum Shrub Species (3 -4' min, height for planting) Quantity Symbol Scientific Name Common Name Quantity Symbol Scientific Name Common Name 2 VC Viburnum Cassinoides Northern Wild Raisen 3 VC Viburnup Cassinoides Northern Wild Raisen 3 VD Viburnum Dentatum Arrow -Wood 3 VD Viburnun Dentatum Arrow -Wood SCALE 1" = 20' Wi_ m it Q U- 3 VL Viburnum Lentago Nannyberry 3 VL Viburnun Lentago Nannyberry 0 20 10 0 20 40 C� CO) SCALE IN FEET Q:WpoweiRTmproAGLENOAKS 200 VWE .pro U a 0 w o. W CV CD o� Q. Q� z (9cc IUz arwso O oU -Z Q `C � 0 �z W� Q o J� Jo w u, oir co°C y WZ ir � 0� � �2 w� co °'' "4 Orn W = a REVISIONS 12/29/08 County Comments 02/27/09 County Comments DATE JULY 28, 2008 SCALE 1" =20' CONTOUR INTERVAL 2 FEET FILE NUMBER 387 IA? Z co s z a t 0� o J U W ... z W2 Q 0 CO) /W/ a: w Wa Z co Q 0 a� J_ Wi_ m it Q U- 0 :49 0 m Z tr 0 C� CO) FILE NUMBER 387 PLANT LIST TOTALS Tree Species (1" min. caliper) Quantity Symbol Scientific Name 6 AR Acer Rubrum 6 QP Quercus Phellos 6 NS Nyssa Sylvatica Shrub Species (3 -4' min. height for planting) Quantity Symbol Scientific Name 19 VC Vibumum Cassinoides 14 VD Viburnum Aentatum 14 VL Vibumum Lentago Common Name Red Maple Willow Oak Black Gum Common Name Northern Wild Raisen Arrow -Wood Nannyberry PLANTING INSTRUCTIONS 1. BEFORE PLAN71NG CAN TAKE PLACE, BIOFILTERS MUST BE INSPECTED BY THE WATER RESOURCES STAFF. 2 O DEN07ES TREE SPECIES 3. O DENOTES SHRUB SPECIES. 4. TREE SPECIES SHALL BE PLANTED AROUND THE PERIMETER OF THE 810FILTERS IN THE APPROXIMATE LOCA7IONS SHOWN. A MINIMUM OF 44 TREES, (1" MINIMUM CALIPER), AND 127 SHRUBS SHALL BE PLANTED. SHRUB SPECIES SHALL BE PLANTED IN GROUPINGS IN TIME APPROXIMATE LOCATIONS SHOWN. TREE AND SHRUB SPECIES SHALL BE FROM TABLES 3.11 -7A & B. RECOMMENDED PLANT SPECIES FOR USE IN BIORETENTTON, LOCATED IN VOLUME 1 OF THE VIRGINIA STORM WATER MANAGEMENT HANDBOOK. A MINIMUM OF 3 SPECIES MUST BE USED IN THE 810 -FILTER TO INCREASE DISEASE TOLERANCE 5. GROUND COVER WITHIN EACH BIOFILTER SHALL BE SODDED UNLESS A SUITABLE ALTERNATIVE FROM TABLE 3.11 -7C (VIRGINIA STORMWATER MANAGEMENT HANDBOOK, VOLUME 1) IS CHOSEN AND APPROVED BY THE WATER RESOURCES MANAGER. MINIMUM STANDARD 3.14 CHAPTER 3 Level Spreader .LEVEL SPREADER CROSS SECTION JUTE, OR EXCELSIOR OR EQUIVALENT ' MIN. 7 STAPLED IN PLACE VARIABLE ( ) BURIED 6" MIN. 6" MIN, OMMMIA, Y ..x-BURIED LEVEL LIP OF SPREADER — Miry 6' LEVEL SPREADER WITH VEGETATED LIP VDOT #3, #357, #5. #56 OR #57 COARSE AGGREGATE IN GALVANIZED WIRE MESH BASKET * FILTER CLOTH SECURE WIRE TO GROUND WITH WIRE STAPLES = 7' MIN. UNDISTURBED SOIL CROSS SECTION VARIABLE (MIN. 7') —SECURE MIRE MESH TO TIMBER r--6X6 TREATIED TIMBER 6" MIN. �5 REBAR PTO MItN. 6' LEVEL SPREADER WITH RIGID LIP Refer to Std. & Spec. 3.21 - VA Erosion and Sediment Control Hondbook 3.14-9 13 2;1 OR FLATTER 2:1 OR FLATTER 400 _ S 400 K D =V— 1) 390 N N 390 s 49 _ - - - - - -- - - -__ - ------------ -1Ot9 -- - - - - -- - - - - - -- -- N --- - - - - -- 380 - - 380 c H y M 370 370 N O O .- 00 N N .- N O N (n r"') n M �p C'0 00 N c0 to O 0 to to O I[) O On U pp d t� tM M d N d .- rri .- rM O tv ca N 00 00 00 00 00 00 a0 00 ao 00 00 0p 00 00 a0 00100 M M M M M M M M r) M M M M M 0 +00 0 +50 1 +00 1 +50 2 +00 2 +50 3 +00 3 +50 4 +00 4+50 5 +00 DETAIL °A' RIP RAP OUTLET CHANNEL DETAIL, Lw (VARIABLE) F TER CLOTH ILL 2. FOREDAY FOR fl;v•�, r 5.01 FOREBAY RIP OR B RAP FF-8 WEIR DETAIL 3. f NOTE THE DI:SfAKCIE BETWEEN . CLEAN�UTS!IArILL NOT:EXCEED 50 !�,EET. TOP or- 11-61 PLAN WEIR ORIGINAL= IRA SI✓G7Wr4_. PROVIDE PIPES XROSS ENTIRE WIi71'H AT 26•FT 04. PROFILE TOP Of. SIDE SLOPE REGRADED. T03;1 6" TO I' BIOFILTER 141X PER STATE.STANDARDS �`— UNDERDRAM GRAVEL �(�A/�A,SHTOM43, in i IF'R1�a faVl�l4 RBNOVE'' T AND' . SEDIMENFAL TER FINAL SiABUIZl.TM& REPLAN WITH LOAM OR GRANULAR EARTHInlL. CLEAN -OUT 6" TO i ' wlwly �to 6* 6" NON- PERFORATED /� PVC PIP` C S% MIN, SLAPS -� --- -- 20 ft a,c .. LOOT OR GRANULAR 6" PEMRATED PC EARTHRU PIPE L*'s% MM, SI.7'E CROSS SECTION SILT TRXP RETROFIT TO BIO- FILTER NO SCALE INSTRUCTIONS FOR CONVERTING AND /OR CONSTRUCTING BIOFILTERS 1. SEDIMENT TRAPS 2, 3, 4, 6, 7 AND 8 WILL BE CONVERTED TO B10FILTERS 2, 3, 4, 6, 3 AND 8 RESPECTIVELY. ,2. PERMISSION MUST BE GRANTED BY THE WATERSHED MANAGER AND EROSION CONTROL OFFICIAL BEFORE THE CONVERSIONICONSTUC71ON PROCESS CAN TAKE PLACE. 3. REMOVE ALL ACCUMULATED SILT AND APPLY LOAM OR GRANULAR EARTH FILL TO RESTORE BOTTOM OF TRAP TO ELEVATION SPECIFIED FOR EACH 810FILTER(SEE DETAILS SHEETS 12 & 13). 4. APPLY UNDERDRAIN GRAVEL TO ELEVATION SPECIFIED FOR EACH BIOFILTER. (SEE DETAILS SHEETS 12 & 13). *I5. APPLY BIOFILTER MIX PE? STATE STANDARDS AS SPECIFIED FOR EACH BIOFILTER (SEE DETAILS SHEETS 12& 13). 6. INSTALL UNDERDRAIN SY)'TEM PER DETAILS ON SHEETS 12 & 13. 7. INSTALL GROUND COVER AND PLANT MATERIALS PER PLANTING PLAN DETAILS ON SHEETS 12 & 13. *' STEP 5 SHOULD BE DONEWITH A SMALL LOADER OR TRACTOR THAT WILL NOT COMPACT THE MATERIAL SIGNIFICANI.Y WHILE IT IS BEING APPLIED. BOTH THE FILL MATERIAL AND 7HE BIOFILTER MIX MIST BE INSPECTED BY THE EROSION CONTROL INSPECTOR AND WATERSHED MANAGER PRIOR TO PLACEMENT. O:WpoweRTmproj GMNOAKS 2MWASE .pro 4 OUTLET 6' IVON- FERFORATED PROTECIZOfi PVC PIPE TO � OVERFLOW DAYLIGHT----____ PROTECpON �W Co o STONE WEIR REBUILD �" AS NECESSARY BERN Q BERM I C) � � o� o.z o �? ;I Ir 3:1 SID= SLOPi�^ I� sl I. �` 0V a W O N LI W 4" PERFORATED PVC PIPE Q.. O SCHEDULE 40 OR APPROVED EQUIV/42147 PUKED 201L O.C. "'• Y is W it rl I , 2 �W W OUTLET PROTicripl/ ENERGY DIMPATEa STORM r i i i i WATER CHANNEL TOP or- 11-61 PLAN WEIR ORIGINAL= IRA SI✓G7Wr4_. PROVIDE PIPES XROSS ENTIRE WIi71'H AT 26•FT 04. PROFILE TOP Of. SIDE SLOPE REGRADED. T03;1 6" TO I' BIOFILTER 141X PER STATE.STANDARDS �`— UNDERDRAM GRAVEL �(�A/�A,SHTOM43, in i IF'R1�a faVl�l4 RBNOVE'' T AND' . SEDIMENFAL TER FINAL SiABUIZl.TM& REPLAN WITH LOAM OR GRANULAR EARTHInlL. CLEAN -OUT 6" TO i ' wlwly �to 6* 6" NON- PERFORATED /� PVC PIP` C S% MIN, SLAPS -� --- -- 20 ft a,c .. LOOT OR GRANULAR 6" PEMRATED PC EARTHRU PIPE L*'s% MM, SI.7'E CROSS SECTION SILT TRXP RETROFIT TO BIO- FILTER NO SCALE INSTRUCTIONS FOR CONVERTING AND /OR CONSTRUCTING BIOFILTERS 1. SEDIMENT TRAPS 2, 3, 4, 6, 7 AND 8 WILL BE CONVERTED TO B10FILTERS 2, 3, 4, 6, 3 AND 8 RESPECTIVELY. ,2. PERMISSION MUST BE GRANTED BY THE WATERSHED MANAGER AND EROSION CONTROL OFFICIAL BEFORE THE CONVERSIONICONSTUC71ON PROCESS CAN TAKE PLACE. 3. REMOVE ALL ACCUMULATED SILT AND APPLY LOAM OR GRANULAR EARTH FILL TO RESTORE BOTTOM OF TRAP TO ELEVATION SPECIFIED FOR EACH 810FILTER(SEE DETAILS SHEETS 12 & 13). 4. APPLY UNDERDRAIN GRAVEL TO ELEVATION SPECIFIED FOR EACH BIOFILTER. (SEE DETAILS SHEETS 12 & 13). *I5. APPLY BIOFILTER MIX PE? STATE STANDARDS AS SPECIFIED FOR EACH BIOFILTER (SEE DETAILS SHEETS 12& 13). 6. INSTALL UNDERDRAIN SY)'TEM PER DETAILS ON SHEETS 12 & 13. 7. INSTALL GROUND COVER AND PLANT MATERIALS PER PLANTING PLAN DETAILS ON SHEETS 12 & 13. *' STEP 5 SHOULD BE DONEWITH A SMALL LOADER OR TRACTOR THAT WILL NOT COMPACT THE MATERIAL SIGNIFICANI.Y WHILE IT IS BEING APPLIED. BOTH THE FILL MATERIAL AND 7HE BIOFILTER MIX MIST BE INSPECTED BY THE EROSION CONTROL INSPECTOR AND WATERSHED MANAGER PRIOR TO PLACEMENT. O:WpoweRTmproj GMNOAKS 2MWASE .pro REVISIONS 12/29/08 County Comments 02/27/09 County Comments DATE June 3, 2008 SCALE 1 M = 2a HORz CONTOUR INTERNAL 2 FEET 1Q z I� o J o a. ice =j z �4Qz I-- W J Z WaQW° Cr C� s zQ W �. V <8 a. S W z z U, �j W ZWW IOC p 0 2 � � CO) M o O z W a:2 W to W a: J p 0 FILE NUMBER 387 Ua zw � � Mai U �W Co o �" < a U Q ltl It s C) � � o� o.z o �? �` 0V a W O N LI W Q.. O >p cc 0 L "'• Y is W 0. LU p 2 �W W = a a. REVISIONS 12/29/08 County Comments 02/27/09 County Comments DATE June 3, 2008 SCALE 1 M = 2a HORz CONTOUR INTERNAL 2 FEET 1Q z I� o J o a. ice =j z �4Qz I-- W J Z WaQW° Cr C� s zQ W �. V <8 a. S W z z U, �j W ZWW IOC p 0 2 � � CO) M o O z W a:2 W to W a: J p 0 FILE NUMBER 387