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HomeMy WebLinkAboutWPO201900053 Plan - VSMP 2020-02-28V5MF PLAN FOR LEGEND EXIST NEW DESCRIPTION 165 TC x 125 TC TOP OF CURB ELEVATION 165 x 125 SPOT ELEVATION 165 TW x 125 TW TOP OF WALL ELEVATION 165BW x 125BW BOTTOM OF WALL ELEVATION BENCHMARK m STORM SEWER RD RD ROOF DRAIN - SEWER LINE s'w 6"w WATER LINE GAS GAS GAS LINE - DHE OHE OVERHEAD ELECTRIC WIRE -UGE UGe UNDERGROUND ELECTRIC aHT DHr OVERHEAD TELEPHONE LINE uGT ucr UNDERGROUND TELEPHONE LINE D I- DRAIN INLET (DI) 0 0 STORM/SANITARY MANHOLE C C PLUG ev ®V WATER VALVE & BOX ♦ 4- FIRE HYDRANT ® ®" WATER METER ♦� �� LIGHT POLE f f UTILITY POLE PROPERTY LINE - - - - ADJACENT PROPERTY LINE VACATED PROPERTY LINE _0__ BUILDING SETBACK PARKING SETBACK SANITARY EASEMENT -- GRADING EASEMENT DRAINAGE EASEMENT UTILITY EASEMENT - - WATER EASEMENT ACCESS EASEMENT STORM DRAINAGE EASEMENT �^ TREE LINE -x--x- x FENCE STREAM 312 12 - INTERVAL CONTOUR 300- oo - INDEX CONTOUR CG-2 CG-2 STANDARD 6" CURB CG-6 CG-6 COMBINATION 6" CURB & GUTTER a a CONCRETE PAVEMENT / SIDEWALK o RIPRAP ASPHALT GRASS EC-2 MATTING EC-3 MATTING WETLAND 10 10 PARKING COUNT 11111111 I1111111 CROSSWALK HANDICAP ACCESSIBLE AISLE E CG-12 HANDICAP PARKING NOTE: THE SIZE OF THE SYMBOLS MAY VARY FROM WHAT IS SHOWN. ECOVILLAGE CHARLOTTE5VILLE TMP OG 100-00-00-2 1000 WPO 201900053 RIO DISTRICT, AL15EMARLE COUNTY, VIRGINIA VICINITY MAP SCALE: 1"=500' S Charlottesville Hig-h I 1: Tay,' o r s Alito Body Shop SITE-*&,, T Advantage Home 9,i co n if acling Charlottesville 71 of , r nx`y. 1V IMAGE PROVIDED BY GOOGLE MAPS SHEET INDEX C I - COVED SHEET C2 - EX. CONDITIONS * DEMO PLAN C3 - 51TE LAYOUT C4 - GRADING PLAN C5 - UTILITY PLAN CG - UTILITY PLAN C7 - E5CP NARRATIVE C8 - E5CP PHA5E C9 - E5CP PHASE 2 C 10 - E5CP PHASE 3 C 1 I - PERMANENT 5WM PLAN C 1 2 - E5CP DETAILS C 13 - E5CP DETAILS C 14 - 5TORM PROEI LE5 C 15 - BIOFI LTIfR * OI=I=51TE 5EWIfR DETAI L5 C I G - 5TORMTECH * BAYEI LTER DETAI L5 C 17 - 5TORMTECH � BAYEI LTER 1 N5TALLATION C 16 - BAYEI LTER 5TORMTECH MAINTENANCE C 19 - BIOf I LTER RAIN GARDEN NOTE5 ANNUAL RAIN GARDEN & BIOFILTER INSPECTION CHECKLIST IT IS HIGHLY RECOMMENDED THAT A SPRING MAINTENANCE INSPECTION AND CLEANUP BE CONDUCTED AT EACH BIORETENTION FILTER. THE FOLLOWING IS A LIST OF SOME OF THE KEY MAINTENANCE PROBLEMS TO LOOK FOR: • CHECK TO SEE IF 75% TO 90% COVER (MULCH PLUS VEGETATIVE COVER) HAS BEEN ACHIEVED IN THE BED, AND MEASURE THE DEPTH OF THE REMAINING MULCH. • CHECK FOR SEDIMENT BUILDUP AT CURB CUTS, GRAVEL DIAPHRAGMS OR PAVEMENT EDGES THAT PREVENTS FLOW FROM GETTING INTO THE BED, AND CHECK FOR OTHER SIGNS OF BYPASSING. • CHECK FOR ANY WINTER- OR SALT -KILLED VEGETATION, AND REPLACE IT WITH HARDIER SPECIES. • NOTE PRESENCE OF ACCUMULATED SAND, SEDIMENT AND TRASH IN THE PRE-TREATMENT CELL OR FILTER BEDS, AND REMOVE IT. • INSPECT BIORETENTION SIDE SLOPES AND GRASS FILTER STRIPS FOR EVIDENCE OF ANY RILL OR GULLY EROSION, AND REPAIR IT. • CHECK THE BIORETENTION BED FOR EVIDENCE OF MULCH FLOTATION, EXCESSIVE PONDING, DEAD PLANTS OR CONCENTRATED FLOWS, AND TAKE APPROPRIATE REMEDIAL ACTION. • CHECK INFLOW POINTS FOR CLOGGING, AND REMOVE ANY SEDIMENT. • LOOK FOR ANY BARE SOIL OR SEDIMENT SOURCES IN THE CONTRIBUTING DRAINAGE AREA, AND STABILIZE THEM IMMEDIATELY. • CHECK FOR CLOGGED OR SLOW -DRAINING SOIL MEDIA, A CRUST FORMED ON THE TOP LAYER, INAPPROPRIATE SOIL MEDIA, OR OTHER CAUSES OF INSUFFICIENT FILTERING TIME, AND RESTORE PROPER FILTRATION CHARACTERISTICS. OWNER / DEVELOPER OWNER/DEVELOPER: ECOVILLAGE HOLDING INC 480 RIO ROAD EAST CHARLOTTESVILLE VA, 22901 MAGISTERIAL DISTRICT RIO ZONING R4 RESIDENTIAL SOURCE OF TITLE DB 4582 PG 174 TMP 06100-00-00-21000 BENCHMARK IRON & CAP BENCHMARKS SET THROUGHOUT SITE. SITE DATUM NAVD88. SOURCE OF BOUNDARY & TOPO BOUNDARY AND TOPOGRAPHIC INFO FOR TMP 61-21 FROM A FIELD SURVEY PERFORMED BY ROGER W. RAY & ASSOC. INC ON AUG. 23, 2018. BOUNDARY AND TOPOGRAPHIC INFO FOR TMP 61-A1A (OFFSITE PARCEL) FROM A FIELD SURVEY PERFORMED BY NIXON LAND SURVEYING, LLC ON DEC. 12, 2016. BUILDING HEIGHT 35' BY RIGHT PROPOSED THREE STORY UNITS (VARIABLE HEIGHTS 35' OR LESS) SETBACKS 5-25' FRONT SETBACK 20' REAR SETBACK 5-10' SIDE SETBACK LIGHTING NO OUTDOOR LIGHTING IS PROPOSED ON THE INITIAL SITE DEVELOPMENT PLAN. TRASH REMOVAL LOCATION OF TRASH TOTER STORAGE NOTED ON SITE LAYOUT (C3) TRIP GENERATION USE DESCRIPTION ITE Qty in out total in out total Townhomes(Mid-Rise) 221 27 2 7 9 7 4 11 Single Family Homes 210 11 2 6 8 7 4 11 22 SLOPES THIS SITE CONTAINS 4,199 SF OF MANAGED STEEP SLOPES AND 41,772 SF OF PRESERVED SLOPES PER FIELD SURVEY. 9,866 SF OF PRESERVED SLOPES OVERLAY WAS SURVEYED AT LESS THAN 15% AND DO NOT QUALIFY AS PRESERVED SLOPES. 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 APPROVED BY A GEOTECHNICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO 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. GENERAL CONSTRUCTION NOTES 1. PRIOR TO ANY CONSTRUCTION WITHIN ANY EXISTING PUBLIC RIGHT-OF-WAY, INCLUDING CONNECTION TO ANY EXISTING ROAD, A PERMIT SHALL BE OBTAINED FROM THE VIRGINIA DEPARTMENT OF TRANSPORTATION (VDOT). THIS PLAN AS DRAWN MAY NOT ACCURATELY REFLECT THE REQUIREMENTS OF THE PERMIT. WHERE ANY DISCREPANCIES OCCUR THE REQUIREMENTS OF THE PERMIT SHALL GOVERN. 2. ALL MATERIALS AND CONSTRUCTION METHODS SHALL CONFORM TO CURRENT SPECIFICATIONS AND STANDARDS OF VDOT UNLESS OTHERWISE NOTED. 3. EROSION AND SILTATION CONTROL MEASURES SHALL BE PROVIDED IN ACCORDANCE WITH THE APPROVED EROSION CONTROL PLAN AND SHALL BE INSTALLED PRIOR TO ANY CLEARING, GRADING OR OTHER CONSTRUCTION. 4. ALL SLOPES AND DISTURBED AREAS ARE TO BE FERTILIZED, SEEDED AND MULCHED. 5. THE MAXIMUM ALLOWABLE SLOPE IS 2:1 (HORIZONTAL: VERTICAL). WHERE REASONABLY OBTAINABLE, LESSER SLOPES OF 3:1 OR BETTER ARE TO BE ACHIEVED. 6. PAVED, RIP -RAP OR STABILIZATION MAT LINED DITCH MAY BE REQUIRED WHEN IN THE OPINION OF THE COUNTY ENGINEER, OR DESIGNEE, IT IS DEEMED NECESSARY IN ORDER TO STABILIZE A DRAINAGE CHANNEL. 7. ALL TRAFFIC CONTROL SIGNS SHALL CONFORM WITH THE VIRGINIA MANUAL FOR UNIFORM TRAFFIC CONTROL DEVICES. 8. UNLESS OTHERWISE NOTED ALL CONCRETE PIPE SHALL BE REINFORCED CONCRETE PIPE - CLASS III. 9. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR THE CONSTRUCTION INDUSTRY (29 CFR PART 1926). SWM FOREST/OPEN SPACE 1.06 ACRES OF SWM FOREST AND OPEN SPACE SHALL BE DEDICATED AS PART OF THE SWM STRATEGY. THE SWM FOREST AND OPEN SPACE EASEMENT IS SUBJECT TO THE GUIDANCE SET FORTH BY THE DEQ IN THE VIRGINIA STORMWATER MANAGEMENT PROGRAM. THE AREAS WILL REMAIN IN A NATURAL VEGETATIVE STATE, EXCEPT FOR ACTIVITIES AS APPROVED BY THE LOCAL PROGRAM AUTHORITY, SUCH AS FOREST MANAGEMENT, CONTROL OF INVASIVE SPECIES, REPLANTING AND REVEGETATING, PASSIVE RECREATION (E.G. TRAILS), AND LIMITED BUSH HOGGING TO MAINTAIN DESIRED VEGETATIVE COMMUNITY (BUT NO MORE THAN 4 TIMES A YEAR). EXISTING USE 2 SINGLE FAMILY HOMES PROPOSED USE T 27 TOWNHOMES, 11 SINGLE FAMILY HOMES, & 1 GUEST LODGING UNIT: 39 UNITS TOTAL PROPOSED RESIDENTIAL DENSITY: 39 UNITS / 6.53 AC = 6.0 DU/ACRE SITE AREA=6.53 AC (INCLUDES INTERIOR LOT TO BE ADDED TO PARENT PARCEL) c BASE R4 DENSITY: 4 UNITS/AC = 6.53 X 4 = 26.1 UNITS BASE COUNT. U JU IN M. SHIMP DENSITY BONUSES: icNo 45183 SEC. 15.4.1: 10% AREA PRESERVED OPEN SPACE: 5% OF 26.1 = 1.3 UNITS ADD'L. SEC. 15.4.2: 7.5% AREA DEDICATED TO PUBLIC USE: 15% OF 26.1 = 3.9 UNITS ADD'L. SEC. 15.4.3: 50% OF UNITS AS AFFORDABLE UNITS: 30% OF 26.1 = 7.8 UNITS ADD'L. 010 TOTAL COUNT: 26.1+1.3+3.9+7.8 = 39.1 UNITS 5, LAND USE SCHEDULE EXISTING AREA % PROPOSED AREA % BUILDING 3,605 SF 1.3% BUILDING 35,830 SF 12.6% PAVEMENT 18,175 SF 6.4% PAVEMENT 39,204 SF 13.8% TOTAL IMPERVIOUS 21,782 SF 7.7% SIDEWALK 23,847 SF 8.4% OPEN SPACE 262,507 SF 92.3% TOTAL IMPERVIOUS 98,881 SF 34.8% TOTAL= 284,289 SF (6.53 AC.) OPEN SPACE 185,408 SF 65.2% TOTAL= 284,289 SF (6.53 AC.) LIMITS OF DISTURBANCE: 5.90 AC WATERSHEDS THIS SITE LIES WITHIN THE MEADOW CREEK WATERSHED. o E E PARKING REQUIRED PARKING: 75 SPACES � c c RESIDENTIAL 2 SPACES/UNITS PER UNIT = 72 SPACES o 0 TOURIST/TRANSIENT LODGING: 1 FOR EACH OF 3 ROOMS = 3 SPACES PARKING PROVIDED: 75 SPACES W -64 STANDARD SURFACE SPACES FOR RESIDENTS (INCLUDES 2 HC VAN SPACES) -8 SPACES IN DRIVEWAYS FOR 8 UNITS -3 SPACES PROVIDED FOR TOURIST/TRANSIENT LODGING (INCLUDS 2 HC VAN SPACES)CD CD FLOOD ZONE 0 N N ACCORDING TO THE FEMA FLOOD INSURANCE RATE MAP, EFFECTIVE DATE FEBRUARY CD4, 2005 (COMMUNITY PANEL 51003CO287D), THIS PROPERTY DOES NOT LIE IN A ZONE A 100-YEAR FLOOD PLAIN. GENERAL CONSTRUCTION NOTES FOR 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. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE 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 WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY 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 DURING 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 TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 11. ALL WASTE MATERIALS SHALL BE TAKEN TO 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:OOAM TO 9:OOPM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE 0 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 FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED 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 90LBS/1000SF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED 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 REPAIRED IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES 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. 21. THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF THE DATE OF APPROVAL. (WATER PROTECTION ORDINANCE SECTION 17-204G.) 22. PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS AFTER THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. 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CONNECT TO EX. ALWOOD /� _ - -LO _ _ - _ LN. PAVEMENT _ ENV Row- o-° - �� FOREST/OPEN - ' SPACE AREA. - - 0.2,CACRES-ISG A RESIDENTIAL UNITS '6 - �ti 27 TOWNHOMES (TH) I / 11 SINGLE FAMILY HOMES (SF) 1 GUEST LODGING ^o � 39 TOTAL UNITS 14' REVERSE Q / CG-s NEW CONCRETE RET. WALL. 5' MAX HEIGHT �� I �S'OgO / y/ \ W. 42" HANDRAIL.. MAX. SETBACK � 2A � 0 (TYP.) �7 �� \�` ♦ 5��05 ♦\♦ )0. M MIN. SETBACK 0 c [ �,� ��Ti (TYP.) U JU IN M. SHIMP p I \ R20' 'U m II I~i \` ��� `♦` ��F 3A �� USE pF0 ST ESMTRAIT/ACCESS EDUCATED lc. No.. 45183 I `\\ \ �� \ �` \ \ �� c `� ' p� 5F `` ` /�N TRq/ TO PUBLIC USE 1 ''-: V' I ♦ ♦ �� 6' I OPEN 4p F ,.. � I - •III ' . ♦ -: (� ` ``♦ ``♦ _ ♦`♦ i NOS �� F 7A �`� �0' EW ROW \ \\ HI H ISI LITY PE . - v <♦♦\ ��� �� �Z 8A ^/USE NG ST PES TY . / rt ♦♦ �0 p�lSF `. PE fS �'� I/i�`y� �'�� _ `♦� ' ♦♦ �' DECK (TYP.) - ♦ ♦ k ,� TRAIL TRABSITIONS TO 14' BIKI=STORAGE (6) \ ♦ 10' MULTIUSE PEDESTRIAN ACSA UTIL. / / FIRE ACCESS ROAD & _E;,. AC L� _ O O O MULTIUSE PEDESTRIAN TRAIL u� 0 � � _ `� ESMT (TYP.) `` 26 � 36 4B ' ` `►41i Q O it_-^° 0� `O� 2�r7 i /r��W. 5' SIDEWALK. MAIL�Pr O / ° L EW S GM NTAL E!% l \ ? \�;• �F� `� _ / i �o�� 76 $B o BLO LLS.rn, r 1o����- ��/ o� �� �� 5 M X EIGH pi�i v� �� i o I TH gA I �_�° / ,� '� f I 3 STORY j ' II. I j ' \`�`�o� °i ACH, AV 4. I 968 SF WA ° J 2 GU R RAIL i►l /o \ I 1 I .11 i _ - / �o�^off .o�ti K �TYP.� R TO ALL. I p�%i (n,,'� / C I r� � �ib°j��'�� i � O / I 3 STORY TH 1 � I I 3 TORY TH � • ---�- r� ��� i __� � �; 68 SF 17A 3 STORY SF 10B 1232 SF — - 704 SF 11 A i I j 7 8 SF 18A i �=.i' I 20 - / - - - - - - - I \� T GE - - - - - °n ro / S A BIKE STORAGE (6) - �Z� i �WM FOREST/OPEN TH _ SPACE AREA-3. OPEN SFA 3 TORY TH i / / � / b- i � 704 SF 12A 1 q / / / / �� w `' _ TORY 1 a SF - I 768 0 3CRE`�S� __ 2559 I �I 0 I I j r-- 3 ORY SF Qu - --_--- - -- f�+� 1056 SIT I Q / / �� �' 704 SF 13 I %jl 19A j j /// ; OPEN SPACE D COMMON HOUSE 2 �� /, i 34030 SF p (EVENT SPACE I �� STORY 126 - o S 2 10' � j 1 n' w u� ONLY) 1900 SF �r�. ' ; 768 � TAIL WW, SIGN--'.----------_--------- --- ------ R15' STORY TH- I 1-12�j � �768 SF �j 3 STORY TH 1 PUBLIC r 3 S / -' I r TORy � ' STA T DRAINAGE / 6g Sp Ty - - ,-- _ '� � � ' ` j � �, � STORY TH / /// / / / • ESMT (TYP.) / 3 � � RIO 1 j°/ / < �// / 6 Ty r e• 768 SF 1A I / (<• // sTRy C �i / 70ORSFTH 15A I �/ �('i/ I I\ I` I Q i 3 STORY TH '� PRIVATE STREET 0 1 I 768 SF 2A ESMT (TYP.) _ R5 T O ;-o \ \�� I \ O 3 STORY TH �� / qR0 R/y - r .` \ . I i 704 SF 16 j / ";-- �� / 4 ( II i i LOT BOUNDARY (TYP.) .LL` Q Ci�A \� `♦ 0 --� COMMON HOUSE 1 3 TORY SF I (GUEST LODGING) \\ \ �� �♦ �� i 1,815 SF � #1RDRAIL j \ 1056 SF 1 / / \� - � �., eN,M-FOREST10PEN \ ` \ 0 D �' - STORA (6) ��� / / p�� - - - SPACECR E SG A \ 6'x8' SCREEN ! I 5' °SICiWAL�C TYP. ♦ `` ` 1 I I I 1C o. / c,Q x12'�EREENWG ENCLOSURE I I _ O — i cn - - - - T G � ENG�OSURE- \ RKIN ♦ `� ! 5' SIDEWALK (7YP.)°.17=- - CG- \ ♦ ♦`.♦ \1\ - - SPACES - �s L�� s. OPEN SPACE- B ROAD A 20' PRIVATE c _ - _ _ - 427T SF _ ��9 \ BEGIN ROW GR-2 c�aP�PaI - S,S�\ WIDENING .� _ - - - - - -� - 3' MAX SEGM. \ �� - \, -��,� - - - - - - - PRESERVED SLOPES - - - - - - - - SO FOREST/OPEN RETWALL *?o �- _ -may - - SPACE AREA 2. - _-- o E-L$ SPACE 0.4&4CRES-flSG A -- -f-' ---- — — — — — — — — ------- - - ------ ------------------------ - �` cG )3 STATE ROADROUTE EAST631 v -/13 a ?� O, PRESERVED SLOPES SURVEYED < 25% • • 30 •• •• Scale: SHED CT (A / DO �c,;// o �a l Q o o � A � 91B5 4 91- 4 \ � I 91 750/ / 13 0 \ ��g NEW CONCRETE RET. \ \ 00 2WALL. 5' MAX HEIGHT 93sa 7_00 ° W. 42" HANDRAIL. _ � � X 9So ooX v '1 00 \\ \ \ y - A _ o �� sz �ti� ! vv` W w __ 05- �J F�� �o " k w w p v vv � �� W W � w I o r � o �, o� , v _ I w w NLT U JU IN M. SHTMP > ic. No. 45183 V - vv - -_ �•+C* �w _ 1025 vv` ` vvv I' �, - - / w w Cry O�v� cai vvv -_ - i / �W o W �1 1Z5---- ���Iw W 1 12 f �v i txti P / vv �� - - - - - W � 1 2505� -vv ��O / �/ W W ' � / J / --- PRESERVED SLOPES 16, v v - �� vvv �� / ��� _ / �w 400- -TO BE DISTURBED -14 �/" w a i V A ,.. w41 �w G� j O� �� - - -- w NEW S GM NTAL 10 v �� �`�`' /' �� �� - 470- ��W �• ��`. �Qi �Y / �' \ 5 M X EIGH / ABAC A'�� II I I i / I r .� 2 GU R RAIL O 1. / i BFE 429.8 / % ��`�b_ R T-0 ALL. �'16 / I /BFE 420.8 1 / / \ _ L i J 4 i , ��2 � �T Iijlll i/ i / � ! j`�2 76 I I H j r i 11 F I _ FFE 430.5 % w / FFE 438.0 47 I o w - - - ` 0 BFE 421.5 BFE 429.0 __- 1 1 �O L �N ow ��- I \��d' 1 -- - - - - - - - • r a r . . a . - s h " 1 470.3 141 - -- -_ 1 FFE 431.2 1 w 1 FFE 439.8 / / _ 43 __ I1 \ 422.2 / j _ $FE 0.8 �,- / �/ w Ib L_ .((II i� o - N N / LL _47 - Ali '04 �� FFE 431.9 / - / -_ 5 �� IV I , I �/ 5�i� 200 _ FFE 465.0 X¢ I � 1 440.8 i / / �_. �_- 460 FFE / 431.8 1 - - _ - " 80 F-F�32.6 " - - I � \w _ i r I ti� ��, BFE 423.E!/ \ / --- --- a. ----------- -- - Z I - - / - i �i i i� / 8 R i o� I FFE_ �3-' - m - /� / FF 458.4 i aa- ----- ------------------ - F. C S O i 0 / / 449.4 $� �� / �FE o� �__ as _ - - - - - - - �%.�..� 7- BFE �459 / ��� - - - - -<�-' ------ - _ _ - - - S / / �S I _ s � y i / 1.5% ------------ _ - / ^� l� �i� c� T BFE 1 F 442.0 i i / o� s5 �' / A J 1 /� 433.0 �- A T 1 O� I FFE V4. BFE 425.0 4 RIO / 1 / g / T-J /- \ Cx 1 -Is i FFE 443.0 FFE 435.5 / - /7_ / 0 L7 11 BFE 4�6.5 FFE 445.0 O 0 \ \ �\ �� gFE 436.0 __� _ / / \ o / \ / / C� / 0 A \ FFE \ 428.0' BFE fTl / tom` O \ 2 / Im / GR-2 GL'A RAIL 1 FFE 451.0 410�� \ \ �, \ - i 1 FFE 445j8 I BFE 442.0vv9 BE 436J8 I I _ y / _ �S0 Ilk 0 \ _ - 6.0%CD / -j GR_2 GUARDRAIL \ - �'MAXS�6LM.J ��\ � X-�\-\_--_- -- ------ --- ,�-i / - _ v � _ _ _ i PRESERVED SLOPES �FY CCKRETWALL\42 \'`�' �_-\----_---__- -- - \ 40- _ / O ---- 430- o�\ \ N / = _ _ - --__ ----------------------------- F wN _- - - _ _ _ _ 03 4A v �`�� WHITE �lN // oti� // // /' STATE /ROUTE 631 0 cG �� �� GUgRO F RIO OAD EAST 00 PRESERVED SLOPES r SURVEYED < 25% • • 30 •• •• Scale:• SAN. STORM A5 PUBLIC 'E ESMT ENT IENT / 730 6WALL CONC. TOP=387 80 INV=385.29 1 POWER POLE A,�;= I t WE OPEN SPACE A 17377 SF EW ROW Z \ / G Z G� i m \ NEW 20' DOMINION POWER ESMT \ GG' F` F �G \F BEGIN BRANCH 1 18%8" TS&V TO EX. RWSA WATERLINE OUTLETNSPOUT 24" 24" #3 STONE OR RIVER STONE OUTLET PROTECTION 8 PEA GRAVEL FLOW SPREADER TO RAIN GARDEN PEA GRAVEL FLOW WOODEN RETAINING SPREADER PERP. WALL AS NEEDED. TO FLOW BERM/WALL MUST BE LENGTH=24" AT LEAST 7" ABOVE MIN. 24" LENGTH WIDTH=B' MEDIA ELEVATION OF #3 STONE OR DEPTH=6" NOTE: BIORETENTION PLANTING IMPERMEABLE LINER RIVER STONE NOT SHOWN THIS DETAIL STAPLE INTO WALL OR \ OUTLET KEY IN 6" INTO GROUND PROTECTION. 6" TEMP. PONDING 2" MULCH LAYER ELEVATION, - _ _ - II---p 18 BIOFILTER MEDIA MIX II— �I II II—' 2" STONE STORAGE BIOFILTER MEDIA MIX II -III- 'I LAYER. USE #57 STONE 18" / 80%-90% SAND T�'� 10%-20% SOIL FINES NONWOVEN FILTER 111 III �I' 3%-5% ORGANIC MATTER FABRIC BELOW GRAVEL. USE MIRAFI 140N OR EQUIVALENT. II 12" T� 6" KEY -IN ITri' STONE BOTTOM OF STONE 6" PERF PVC UNDERDRAIN. IMPERMEABLE FILTER CONNECT TO HDPE DRAIN I —II FABRIC ON SIDES OF WITH INSERTA-TEE. INVERT RAIN GARDENS. 2" ABOVE STONE BOTTOM ~ 6" KEYAT 13"-12" HOPE COLLECTOR DRAIN. ELEV+3.1 ELEV+2.5 6"-18' j__ - ELEV+1.0 til BASE=0.0 mill, 'yqk SIDEWALK a \A6G \ ROOF DOWNSPOUT DETAIL 2 TYP. RAN GARDEN DETAIL �,_j 8" STEEL SIDEWALK j ° GF` FLUME C5 NOT TO SCALE C5 NOT TO SCALE I w 785 LF UNDERGROUND (M� w I- �j � ELECTRIC CONDUIT Q if o ° ���°� / / \ N OTE: N z ALL RAINGARDENS ARE LEVEL 1 BMPS. W NEW 10' PUBLIC LOTS 1 A-8A SHALL HAVE RAIN P / �V� DRAINAGE ESMT / \ A6B GARDENS WITH A 66 SF FOOTPRINT. o // ����'a°� `��' q_1 �`�� G� LOTS 9A-17A SHALL HAVE RAIN \ GARDENS WITH A 80 SF FOOTPRINT. SEE SHEET C6 FOR REMAINING LOTS' DETAILS. Jz R�j RWSA WATER EASEMENT U JU IN M. SHIMP Gv A— ,�� GAF �' S.q �lZ SRW—ARV-16 ic. hlc.5183 \ \ GV \� `� Oct - ' fit+ 90° w w ��� PNEW OWEROESM MINION O"+i~;,'� BEND i w �.T} IseV A ` �� 3A �'/ w W __ W �c W 5 � SEE SHEET C15 ��,, \ S�� &, UGE _ / � <\ o UGE � W w NA GRASS �� \ 4A / \, �\ \ Uc UCE� W Ass \ \� S9ti 4 \ FILT STRIP \`� A-3 `� E UGE UGE W W EX BE \ �� UGE 8 WS W R OP N E B o2 \ ! o� UGE W A WL 42 16 — � UGE � � �.� � 5 — — -� i / , 5A � � ��� � ucE UGE � W � W \ �_ �E� I II I � \� / i i \ �� i �i� ��� � UGE � ucE � GE � W � W \ � \ �\ �\ � UGE � GE \ �� 6A e \ � � � y� � I II I IIIII ��Q A-4 NEW ROW -� y S i o/ BMP E: ADS BAYFILTER W. ' \\ BEND oL w �'. /� BIOFILT IOf� STORMTECH CHAMBERS �P, A7 A � � v i,�,' — W W W W\ TEATED ARAFw . C\ A-6 �\ q-7 w ro>� 3 > TOTAL AREA TREATED: QQ _ �V NEW 10' Pb LIC 3.39 AC (INCLUDES 0.78!' I -- --� �— SPA CE C�\ °�w GV �� ` DRAINAGE Es%T — `r I '— SDR_ EN _� I 8» ST `� \ 8 NEW PUBLIC SWM d, AC DIRECT + 2.61 AC ;;� _ FROM BMPS A B & C) M FACILITY ESMT PP — � G ORM �r�i As 1 B2 15" PP STORM P ° E3 � � NEW 20' PUBLIC `H� DROP INLET ��!� iI' I -- w \ DRAINAGE ESMT ° G1 \ ` �\ 0 6B TOP=398.3 ����% i ; ��� \° a b Gv w �w A_g ' NEW 10' PUBLIC 4FHA w _ / A-10 — \ INV-390. i� �, 1 y r I 15'. 8 w A 11 A-12 \ s DRAINAGE ESMT s I I �� w 1 ,o \ �9 9 �w � — B4 � 8„ SDR—� END _— � � �.� p,-1 y l, qN _ �1, __ E_ A-14 ---i s pp BEND �— A ���� % EXISTING PERMA DRAINAGE EASE = j 1788 P. 730' — I O �w CDI \ I NE 20 PUBLI I I INAGE ESMT NEW PU IC SW z I J _ I --J ,��,,� NE , FACILII�I ESMT I -r— �S y I ° ° < \ ° �. . .. W . . UTIL. ° �A / I s I � �EA E E F �� I I 9 I I �� a� �. � .� � �.'W � � Y ��' �w �w si I I ° � J!h � � 1 1 � I _I 11 A I °'� z i � I 18A ► n I' _ . `'�=.•" � `� �� —3 I I dew ,�� I ,, W W" ��. �. W t- �, END B AN 1: s s _ / ��, �, 10 NATIVE GRASS 8%8" TEE COs --- __� /�/� �\ I FILTER STRIP — — / I \Ilk � s OPEN SPACE D Ny WM 34030 SF EQ PUBLIC S FA LITY ESMT I 00 Rl Q ° W 48" CONC. R ER ° n I yZ ° / BMP C. 75� SF LEVEL 2 It I i 14A IF BIOFILTRATI'ON BASIN. w i ° // //// / TREATED �REA: 0.76 AC _ w� 21A I / s_�Js / < \ s y I o— / ! B-13 �— I ��� / w W ��E�•_ �90` 13 \ ° 15A V `% ° �/ END BRANCH 2: GV-� BEND E —7 = BHA —23 -- I 10' NATIVE GRASS I I s s J / S 16A I —141 FILTER STRIP �W \ B-8 1 \ J d DRAINAGE ESMT MW \ W PUBLIC SWM \ % G2 I yy W w 3A v \° Tw .J —151 i F A FHA? BEN / I -- I ° 1 C 20 0 20 40 6 a END BRANCH\4- FN1 \ EW PUBLIC SWM p Scale: 1 "=20' F CILITY ESMT o RWSA WATER EASEMENT SRW—ARV-16 —_w __w —w W --,W ---w ---w �W �W LICE E UCE w W --- BMP A: (23) 75 SF UGE� UGE W w EX 18" Rws LEVEL 1 RAIN GARDENS uGE- UGE- LICEw w A wL IN PERIMETER LOTS uGE � LIGE � uGE GE uGE w � W � w TREATED AREA: 0.84 AC \ � � � \ GE \\ \\ w NEW 20' DOMINION UGE LICe POWER ESMT \ LICE W BEGIN BRANCH 2: 18%8" TS&V TO EX. RWSA WATERLINE NEW PUBLIC SWM FACILITY ESMT / W AGE w R Vysq z w � W WL 7_ 7 A A w w �Z w w A 9 A-10 NEW 10' PUBLIC / �� O 813 DRAINAGE ESMT / e �➢ � w � —� � A-11 A-12 p 9B g _ 12 8» ENDto A E 90• _ _ � � A-14 ~ — BEND �— \\\ / \ / Q, STDRM CDR— - �---� _\��� A 15 A-16 / a^� A-18 az3 a� AGE,` LILE p�wP IS �/ `i — �, r OUTLETNSPOUT 24" #3 STONE OR RIVER STONE OUTLET PROTECTION 8 PEA GRAVEL FLOW SPREADER 24" TO RAIN GARDEN PEA GRAVEL FLOW WOODEN RETAINING SPREADER PERP. WALL AS NEEDED. TO FLOW BERM/WALL MUST BE LENGTH=24" AT LEAST 7" ABOVE MIN. 24" LENGTH WIDTH=8" MEDIA ELEVATION OF #3 STONE OR DEPTH=6" NOTE: BIORETENTION PLANTING IMPERMEABLE LINER RIVER STONE NOT SHOWN THIS DETAIL STAPLE INTO WALL OR OUTLET KEY IN 6" INTO GROUND PROTECTION. 6" TEMP. PONDING 2" MULCH LAYER RU1VOF, _ ELEVATION, - II---p 18 BIOFILTER MEDIA MIX 1- I I �.- 3: 1 I11- �I 12" STONE STORAGE BIOFILTER MEDIA MIX II -III- III 'I LAYER. USE #57 STONE 18" / 80%-90% SAND T�'� 10%-20% SOIL FINES NONWOVEN FILTER 111 III �I' 3%-5% ORGANIC MATTER FABRIC BELOW GRAVEL. USE MIRAFI 140N OR EQUIVALENT. - 12" T� 6" KEY -IN ITri' 6" PERF PVC UNDERDRAIN. IMPERMEABLE FILTER CONNECT TO HDPE DRAIN I —II FABRIC ON SIDES OF WITH INSERTA-TEE. INVERT RAIN GARDENS. 2" ABOVE STONE BOTTOM ~ 6" KEY -IN AT 8"-12" HOPE COLLECTOR DRAIN. BOTTOM OF STONE 1 ROOF DOWNSPOUT DETAIL C6 NOT TO SCALE ELEV+3.1 ELEV+2.5 6"-18" ELEV+1.0 mBASE=0.0 i'yqk ll, SIDEWALK 1111 2 TYP. RAN GARDEN DETAIL C6 NOT TO SCALE NOTE: ALL RAINGARDENS ARE LEVEL 1 BMPS. LOTS 1 B-15B SHALL HAVE RAIN GARDENS WITH A 67 SF FOOTPRINT. P c A A-17 , N DIP n o 10B UTIL.�G 1 1 `. W'..". ASE EN p _ FH 1 `� ti w F N A VD TO w w op oy y w� H / \ \ ' END AN 1: yw �' ti A-19 �10 NATIVE GRASS 8"XS" rE S W I OPEN SPACE E a W W y y y a //� y I FILTER STRIP a ti 11B 25359 SF p 45• 1 y N PUBLIC SWM It // I OPEN SPACE D �� 8» P ��� FACILITY ESMT tiLI p H �, w I A-21 � � c A-20 12B B� J // ,/ NEW PUBLIC SWM 3 40 3 0 S F W ° W � �� ��� 1 GNLI FACILITY ESMT / .WWw /, / 48" CONC. R ER � � C, / 4. =w _ �A— 13B 0' PUBLI / / y , BMP C: 75b SF LEVEL 2 / DRY T / BIOFILTRAT►ON BASIN. TREATED AREA: 0.76 AC .. — W —W w 8„x6" / W �ED. 90• 3 / / p END BRANCH 2: BEND / J = —EHA GV F 23 W p 10' NATIVE GRASS � WWI / FILTER STRIP W y W \ %`.,/ .0 y W .✓ 4 W W� W W� tl 4 V Q c a. ✓ W a .r� W 6 LL P a a W W — W" VJ a SIGN Lnii FT 20.37 PAVED DITCH OPEN SPACE B 42716 SF S ............. SIGN 0 D4=444J7 NV. 434.29 SIGN \ oti • • 20 40 .• ■■■■■ Cc�r U JU IN M. SHTMP ic. No.. 45183 PROJECT DESCRIPTION, GENERAL NOTES, EROSION & SEDIMENT CONTROL NOTES, AND SEQUENCE OF CONSTRUCTION PROJECT DESCRIPTION THIS SITE IS A DEVELOPED BUT MOSTLY WOODED LOT OFF RIO RD EAST IN ALBEMARLE COUNTY BEING DEVELOPED INTO A MULTI -UNIT COMMUNITY. THE TOTAL AREA OF DISTURBANCE IS 5.90 ACRES. THE PROJECT INVOLVES THE FOLLOWING WORK ACTIVITIES: 1. THE CONTRACTOR SHALL OBTAIN ALL LOCAL AND STATE EROSION AND SEDIMENT PERMITTING REQUIREMENTS AND MAINTAIN ALL EROSION AND SEDIMENT CONTROLS IN ACCORDANCE WITH THE PERMIT REQUIREMENTS. 2. INSTALLATION OF PERMANENT EROSION AND SEDIMENT CONTROL MEASURES AS SHOWN ON THE PLAN AND DETAILS. 3. GRADING AND PLACEMENT OF FILL SHALL BE IN GENERAL ACCORDANCE WITH THE PLAN 4. ESTABLISHMENT OF PERMANENT STABILIZATION OF ALL DISTURBED AREAS. ADJACENT PROPERTIES THIS PROPERTY IS BORDERED ON THE EAST AND SOUTH BY RIO ROAD EAST. THE PROPERTY IS BORDERED ON THE WEST AND NORTH BY DEVELOPED, PARTIALLY WOODED LOTS. OFFSITE AREAS: SOIL MAY NEED TO BE EXPORTED AND STOCKPILED OFFSITE. IF OFFSITE WASTE AREAS ARE USED, THESE SHALL HAVE EROSION CONTROL PERMITS. THESE WILL BE NOTED ON THE REGISTRATION STATEMENT BEFORE THE PRECONSTRUCTION MEETING AND ISSUANCE OF THE LAND DISTURBANCE PERMIT. SOILS THE SITE CONTAINS THE FOLLOWING SOIL TYPES: 21B - CULPEPPER SANDY LOAM - 2 TO 7% SLOPES, HSG B 47D - LOUISBURG SANDY LOAM - 15 TO 25% SLOPES, HSG A CRITICAL AREAS THE CRITICAL AREA ON THE SITE IS RIO ROAD EAST. THE CONTRACTOR SHALL ENSURE NO SILT ENTERS THE ROADWAY. EROSION & SEDIMENT CONTROLS 1. SAFETY FENCE: A PROTECTIVE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL MEASURE, STD. AND SPEC. 3.01. 2. CONSTRUCTION ENTRANCE: INSTALL AND MAINTAIN A CONSTRUCTION ENTRANCE, AS NECESSARY, THAT MEETS THE REQUIREMENTS OF STD. AND SPEC. 3.02 AND CONFORMS WITH THE REQUIREMENTS OF THE EROSION & SEDIMENT CONTROL PLAN. 3. SILT FENCE: INSTALL AND MAINTAIN SILT FENCE THAT MEETS THE REQUIREMENTS OF STD. AND SPEC. 3.05. THIS SILT FENCE SHALL BE INSTALLED AS SHOWN ON THE EROSION & SEDIMENT CONTROL PLAN AND ACCOMPANYING DETAILS FOR THE PURPOSE OF INTERCEPTING SILT -LADEN RUNOFF BEFORE IT IS DISCHARGED FROM THE SITE. THE SILT FENCE SHALL BE INSPECTED AND MAINTAINED TO ENSURE CONTINUED PERFORMANCE. 4. TEMPORARY SEDIMENT TRAP: A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS FOR ENOUGH TIME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT. MAXIMUM EFFECTIVE LIFE IS 18 MONTHS. STD. AND SPEC. 3.13. TO BE CONVERTED INTO A PERMANENT DETENTION POND AT THE END OF CONSTRUCTION AS DETAILED. 5. TEMPORARY DIVERSION DIKE: A RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA WHICH DIVERTS SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING STRUCTURE. MAXIMUM EFFECTIVE LIFE IS 18 MONTHS. STD. AND SPEC. 3.09. THE CLEANWATER DIVERSIONS WILL BE MADE STABLE BY THE USE OF VDOT LD-268 DESIGN STANDARDS. 6. TEMPORARY SEEDING: TEMPORARY SEEDING SHALL BE APPLIED TO ALL DENUDED AREAS WITHIN SEVEN (7) DAYS TO DENUDED AREAS THAT MAY OR MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. TEMPORARY SEEDING SHALL BE APPLIED IN CONFORMANCE WITH STD. AND SPEC. 3.31. 7. PERMANENT SEEDING: PERMANENT SEEDING SHALL BE APPLIED TO AREAS DELINEATED ON THESE PLANS WITHIN SEVEN (7) DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. PERMANENT SEEDING STABILIZES DISTURBED AREAS AND ENHANCES THE BEAUTY OF THE SITE. 8. MULCHING: APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE TO PREVENT EROSION AND FOSTER THE GROWTH OF VEGETATION. ORGANIC MULCHES (STRAW) HAVE BEEN FOUND TO BE THE MOST EFFECTIVE. 9. DUST CONTROL: CONDUCT DUST CONTROL OPERATIONS NECESSARY TO MET THE REQUIREMENTS OF STD. & SPEC. 3.39 AS REQUIRED TO CONTROL SURFACE AND AIRBORNE MOVEMENT OF DUST. 10.INLET PROTECTION: INLET PROTECTION MEASURES AROUNF THE NEW INLETS SHALL BE PROVIDED IN ACCORDANCE WITH STD. AND SPEC. 3.07. SILT FENCE, STRAW BALES OR TEMPORARY STONE APPLICATIONS SHALL BE APPLIED AS APPROPRIATE FOR CURRENT GRADE CONDITIONS. 11.OUTLET PROTECTION: RIP -RAP SHALL BE PROVIDED AT THE OUTFALL OF CONVEYANCE CHANNELS, CULVERTS, AND STORM SEWERS IN CONFORMANCE WITH STD. AND SPEC. 3.18. OUTLET PROTECTION SHALL BE INSTALLED WITH ACCOMPANYING STORM SEWERS AND SHALL BE INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRED IF NECESSARY. ANT SEDIMENT BUILD UP SHALL BE REMOVED. PERMANENT STABILIZATION AND SEQUENCE OF CONSTRUCTION THE FOLLOWING ARE THE PROPOSED MANAGEMENT STRATEGIES AND DETAILED SEQUENCE OF CONSTRUCTION: STAGE 1 1. INSTALL CONSTRUCTION ENTRANCES OFF RIO ROAD AS SHOWN ON C8. INSTALL SILT FENCE SHOWN. 2. INSTALL STORM SEWER "SECTION A". REFER TO C14 FOR OFFSITE STORM. 3. WHEN "SECTION A" STORM HAS BEEN INSTALLED AS SHOWN, CONTACT ENGINEER AND ALBEMARLE COUNTY TO INSPECT. AFTER THIS AREA IS STABILIZED, REMOVE CONSTRUCTION ENTRANCE ON PARCEL A1A. 3. INSTALL DIVERSIONS, SILT FENCE, INLET PROTECTION, & SEDIMENT BASIN. 4. CONTACT DESIGN ENGINEER AND THEN COUNTY INSPECTOR FOR INSPECTIONS. 5. WHEN ALL PARTIES HAVE APPROVED FIELD CONDITIONS, BEGIN MASS GRADING, STARTING AS SHOWN ON SHEET C8. 6. MAINTAIN PERIMETER CONTROLS DURING TRANSITION INTO STAGE 2. STAGE 2 1. MOVE CONSTRUCTION ENTRANCE TO NEW LOCATION SHOWN ON SHEET C9 AFTER STAGE 1 AREA IS GRADED. 2. INSTALL ADDITIONAL PERIMETER CONTROLS AS SHOWN AS GRADING PROCEEDS. CONTACT DESIGN ENGINEER TO INSPECT AND CONFIRM PROPER INSTALLATION. 3. INSTALL UTILITIES AND GRADE ROAD AREAS. 4. MASS GRADING SHOWN ON THIS SHEET REPRESENTS INTERMEDIATE GRADES AND CAN BE ADJUSTED IN THE FIELD. 5. MAINTAIN SEDIMENT BASIN UNTIL ALL UPSTREAM AREAS ARE STABILIZED. CONTACT BOTH DESIGN ENGINEER AND COUNTY INSPECTOR BEFORE BASIN IS REMOVED. STAGE 3 1. INSTALL SILT FENCE WHERE NEEDED FOR ANY FINAL PERIMETER GRADING (PRIMARILY FOR REMOVAL OF SEDIMENT BASIN AND DIVERSIONS ALONG THE PERIMETER) 2. AFTER SEDIMENT BASIN IS REMOVED, INSTALL STORMTECH BMP AND LOWER PARKING AREA. DO NOT INSTALL STORM CARTRIDGES UNTIL SITE HAS BEEN ENTIRELY STABILIZED AND SYSTEM HAS BEEN CLEANED OUT. 3. WHEN SITE HAS BEEN STABILIZED, HOUSE CONSTRUCTION MAY BEGIN. 4. DURING HOUSE CONSTRUCTION, AREAS THAT ARE NOT BEING DISTURBED MUST REMAIN STABILIZED. INSTALL SILT FENCE PROTECTION FOR LOTS UNDER CONSTRUCTION. 5. IMPORTANT: RAIN GARDENS SHALL BE INSTALLED LOT BY LOT. DO NOT INSTALL RAIN GARDENS UNTIL EACH RESPECTIVE HOUSE HAS BEEN CONSTRUCTED. THE RAIN GARDEN UNDERDRAINS SHALL BE CONNECTED TO THE STORM DRAINS WITH INSERTA-TEES AS THE FINAL STEP OF LOT CONSTRUCTION. CONTACT DESIGN ENGINEER FOR INSPECTIONS OF THE RAIN GARDENS. 6. DO NOT INSTALL BIOFILTERS UNTIL ALL UPSTREAM AREAS ARE PERMANENTLY STABILIZED. FINAL 1. MAINTAIN CONTROLS UNTIL SITE STABILIZATION AND COUNTY INSPECTOR HAS APPROVED CONTROL REMOVAL. 2. ANY SEDIMENT THAT ENTERS BMPS FROM CONSTRUCTION MUST BE CLEANED OUT BY CONTRACTOR. CONSTRUCTION MAINTENANCE THE FOLLOWING CONSTRUCTION MAINTENANCE PRACTICES SHALL BE FOLLOWED AT THE SITE. 1. ALL E&S CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAIN EVENT. ALL DEFICIENCIES IDENTIFIED DURING THESE INSPECTIONS SHALL BE CORRECTED AS SOON AS PRACTICABLE. 2. THE SILT FENCE BARRIER SHALL BE REGULARLY CHECKED FOR UNDERMINING, DETERIORATION OR SIGNIFICANT EROSION. SEDIMENT SHALL BE REMOVED AFTER EACH STORM EVENT AND WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHES HALF THE HEIGHT OF THE CONTROL. 3. THE CONTRACTOR IS RESPONSIBLE FOR ADHERING TO ALL MAINTENANCE REQUIREMENTS SET FORTH IN THE CURRENT EDITION OF THE VIRGINIA SEDIMENT AND EROSION CONTROL MANUAL, OTHER APPLICABLE COMMONWEALTH OF VIRGINIA REGULATIONS AND THE PROJECT SPECIFICATIONS. 4. ALL SEEDED AREAS WILL BE REGULARLY CHECKED TO ENSURE THAT A GOOD STAND OF GRASS IS MAINTAINED. 5. AREAS WITH RIP -RAP SHOULD BE REGULARLY INSPECTED TO DETERMINE IF HIGH FLOWS HAVE DAMAGED THESE CONTROLS OR CAUSED EXCESSIVE SEDIMENT DEPOSITION. ALL AREAS SHALL BE MAINTAINED IN ACCORDANCE WITH THE REQUIREMENTS OF THIS E&S CONTROL PLAN. ENVIRONMENTAL CONTROLS 1. CONTRACTOR SHALL PROVIDE AND MAINTAIN ALL ENVIRONMENTAL CONTROL MEASURES SO AS TO COMPLY WITH LOCAL ORDINANCES, STATE AND FEDERAL LAWS AND REGULATIONS APPLICABLE TO WATER POLLUTION IN WATERS OF THE STATE AND IN INTERSTATE WATERS. 2. CONTRACTOR SHALL MINIMIZE THE POTENTIAL FOR AIR POLLUTION BY THE USE OF EMISSION CONTROL EQUIPMENT ON CONTRACTOR OPERATED EQUIPMENT, SHUT -DOWN OF MOTORIZED EQUIPMENT WHEN NOT IN USE, AND ACTIVELY CONTROLLING DUST EMISSIONS THROUGHOUT THE PROJECT. EROSION & SEDIMENT CONTROL PERMITTING CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING ALL LOCAL AND STATE EROSION AND SEDIMENT CONTROL PERMITS AND MAINTAINING ALL EROSION AND SEDIMENT CONTROLS IN ACCORDANCE WITH THE PERMIT REQUIREMENTS. GENERAL NOTES 1. THE INFORMATION AND DATA SHOWN OR INDICATED WITH RESPECT TO THE EXISTING UNDERGROUND UTILITIES AT OR CONTIGUOUS TO THE SITE ARE BASED ON INFORMATION AND DATA FURNISHED TO THE OWNER AND ENGINEER BY THE OWNERS OF SUCH UNDERGROUND FACILITIES OR OTHERS. THE OWNER OR ENGINEER SHALL NOT BE RESPONSIBLE FOR THE ACCURACY OR COMPLETENESS OF SUCH INFORMATION OR DATA. THE CONTRACTOR SHALL HAVE FULL RESPONSIBILITY FOR CONFIRMING THE ACCURACY OF THE DATA, FOR LOCATING ALL UNDERGROUND UTILITIES, FOR COORDINATION OF THE WORK WITH OWNERS OF SUCH UNDERGROUND UTILITIES DURING CONSTRUCTION, FOR THE SAFETY AND PROTECTION THEREOF AND REPAIRING ANY DAMAGE THERETO RESULTING FROM THE WORK. ALL OF THESE CONDITIONS SHALL BE MET AT NO ADDITIONAL COST TO THE OWNER. THE CONTRACTOR SHALL CONTACT "MISS UTILITIES" OF VIRGINIA AT 1-800-552-7001 PRIOR TO THE START OF WORK. 2. WHEN WORKING ADJACENT TO EXISTING STRUCTURES, POLES, UTILITIES, ETC., THE CONTRACTOR SHALL USE WHATEVER METHODS THAT ARE NECESSARY TO PROTECT STRUCTURES FROM DAMAGE. ANY DAMAGE CAUSED BY THE CONTRACTOR OR ITS SUBCONTRACTORS SHALL BE THE CONTRACTOR'S SOLE RESPONSIBILITY TO REPAIR OR REPLACE. THIS EXPENSE IS THE CONTRACTOR'S RESPONSIBILITY. 3. REPLACEMENT OR REPAIR OF DAMAGED STRUCTURES SHALL BE AT THE CONTRACTOR'S EXPENSE. 4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROTECTING ALL EXISTING SITE STRUCTURES FROM DAMAGE AND COORDINATING WORK SO THAT THE OWNER CAN MAKE NECESSARY ARRANGEMENTS TO MODIFY/PROTECT EXISTING STRUCTURES FROM DAMAGES. 5. THE CONTRACTOR SHALL BE RESPONSIBLE FOR NOTIFYING ALL UTILITY OWNERS, ADJACENT LAND OWNERS WHOSE PROPERTY MAY BE IMPACTED AND THE VIRGINIA DEPARTMENT OF TRANSPORTATION PRIOR TO COMPLETING ANY OFF -SITE WORK. 6. CONTRACTOR SHALL NOTIFY AND COORDINATE ALL WORK INVOLVING EXISTING UTILITIES WITH UTILITY OWNERS, AT LEAST 72 HOURS PRIOR TO THE START OF CONSTRUCTION. 7. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR THE CONSTRUCTION INDUSTRY (29 CFR PART 1926). 8. THE CONTRACTOR SHALL VERIFY THE LOCATIONS OF ALL BOUNDARIES, BUILDINGS, VEGETATION, AND OTHER PERTINENT SITE ELEMENTS. CONTRACTOR SHALL IMMEDIATELY REPORT ANY DISCREPANCIES BETWEEN EXISTING CONDITIONS AND CONTRACT DOCUMENTS TO THE OWNER AND ENGINEER. 9. CONTRACTOR SHALL SUBMIT FOR THE APPROVAL OF THE OWNER SUBMITTALS OF ALL SPECIFIED MATERIALS LISTED IN THE PLANS, TO INCLUDE SHOP DRAWINGS, MANUFACTURER'S SPECIFICATIONS AND LABORATORY REPORTS. THE OWNER'S APPROVAL OF SUBMITTALS WILL BE GENERAL AND WILL NOT RELIEVE THE CONTRACTOR FROM THE RESPONSIBILITY OF ADHERENCE TO THE CONTRACT AND FOR ANY ERROR THAT MAY EXIST. 10. CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING ALL NECESSARY PERMITS, INSPECTIONS, BONDS, AND OTHER RELATED ITEMS IN ACCORDANCE WITH LOCAL AND STATE POLICY. STORMWATER MANAGEMENT NOTES: 1. ALL CONCETNRATED ONSITE RUNOFF SHALL BE ROUTED INTO MEADOW CREEK. SINCE THE SITE IS LESS THAN 1 % OF THE TOTAL DRAINAGE AREA TO THE POINT OF DISCHARGE IN MEADOW CREEK, NO CHANNEL ANALYSIS FOR EROSION OR FLOOD PROTECTION IS REQUIRED. 2. ONSITE RUNOFF SHALL BE CONVEYED USING STORM DRAINS. 3. WATER QUALITY WILL BE ADDRESSED BY THE USE OF BIOFILTRATION BASINS, RAIN GARDENS, AND A MANUFACTURED TREATMENT DEVICE. THESE WILL MEET THE VRRM REDEVELOPMENT NUTRIENT REMOVAL REQUIREMENTS PER 9VAC25-870-65. 4. BMP COORDINATES: • BMP A: RAIN GARDENS, VARIES. • BMP B: RAIN GARDENS, VARIES. • BMP C: 38.049256,-78.464854 • BMP D: 38.048940,-78.465583 • BMP E: 38.048640,-78.465458 5. BMP A ARE LEVEL 1 VRRM-COMPLIANT RAIN GARDENS FOR HOUSES ALONG THE PERIMETER OF THE DEVELOPMENT. THIS CONSISTS OF 23 RAIN GARDENS, WHICH TOGETHER MAKE UP BMP A. BMP A WILL TREAT A TOTAL OF 0.84 ACRES, WHICH INCLUDES 0.48 ACRES IMPERVIOUS. THE DESIGN TREATMENT VOLUME IS 1893 CF. INDIVIDUAL GARDEN TV IS 83 CF. INDIVIDUAL FOOTPRINT IS 66 SF OF MEDIA AREA. ALL "A" RAIN GARDENS INCLUDE 18" OF FILTER MEDIA ABOVE 12" OF STONE. EACH HAS A 6" PERFORATED PVC UNDERDRAIN. 6. BMP B ARE LEVEL 1 VRRM-COMPLIANT RAIN GARDENS FOR THE INTERIOR HOUSES OF THE DEVELOPMENT. THIS CONSISTS OF 15 RAIN GARDENS, WHICH TOGETHER MAKE UP BMP B. BMP B WILL TREAT A TOTAL OF 0.76 ACRES, WHICH INCLUDES 0.37 ACRES IMPERVIOUS. THE DESIGN TREATMENT VOLUME IS 1508 CF. INDIVIDUAL GARDEN TV IS 101 CF. INDIVIDUAL FOOTPRINT IS 80 SF OF MEDIA AREA. ALL "B" RAIN GARDENS INCLUDE 18" OF FILTER MEDIA ABOVE 12" OF STONE. EACH HAS A 6" PERFORATED PVC UNDERDRAIN. 7. BMP C & D ARE LEVEL 2 VRRM-COMPLIANT BIOFILTRATION BASINS. BMP C TREATS A TOTAL OF 0.76 ACRES, WHICH INCLUDES 0.21 ACRES IMPERVIOUS. BMP C HAS A TREATMENT VOLUME OF 1105 CF. BMP D TREATS A TOTAL OF 0.25 ACRES, WHICH INCLUDES 0.03 ACRES IMPERVIOUS. BMP D HAS A TREATMENT VOLUME OF 231 CF. BOTH BIOFILTRATION BASINS INCLUDE 24" FILTER MEDIA. BMP C HAS 18" #57 STONE STORAGE. BMP C HAS 12" #57 STONE STORAGE. BOTH BMPS HAVE A 6" PERFORATED UNDERDRAIN. BOTH BMPS HAVE GRAVEL FLOW SPREADERS AND GRASS FILTER STRIPS AS PRETREATMENT OPTIONS. 8. BMP E IS A MANUFACTURED TREATMENT DEVICE. THIS INCLUDES STORMTECH CHAMBERS WITH AN ISOLATOR ROW AND A BAYFILTER TREATMENT. THIS BMP PROVIDES 70% TP REMOVAL. TREATMENT VOLUME IS 6,924 CF. 9.1.06 ACRES OF SWM FOREST/OPEN SPACE SHALL BE PRESERVED AND DEDICATED IN AN EASEMENT WITH THE SUBDIVISION PLAT. THE SWIM FOREST AND OPEN SPACE EASEMENT IS SUBJECT TO THE GUIDANCE SET FORTH BY THE DEQ IN THE VIRGINIA STORMWATER MANAGEMENT PROGRAM. THE AREAS WILL REMAIN IN A NATURAL VEGETATIVE STATE, EXCEPT FOR ACTIVITIES AS APPROVED BY THE LOCAL PROGRAM AUTHORITY, SUCH AS FOREST MANAGEMENT, CONTROL OF INVASIVE SPECIES, REPLANTING AND REVEGETATING, PASSIVE RECREATION (E.G. TRAILS), AND LIMITED BUSH HOGGING TO MAINTAIN DESIRED VEGETATIVE COMMUNITY (BUT NO MORE THAN 4 TIMES A YEAR). THIS AREA WILL REMAIN UNDISTURBED OR RESTORED TO A HYDROLOGICALLY FUNCTIONAL STATE. FOR THIS DEVELOPMENT, THE AREA IS WITHIN THE SUBDIVISION'S OPEN SPACE LOT. THIS 1.06 ACRE AREA IS SHOWN ON C11. THIS AREA IS OUTSIDE THE LIMITS OF DISTURBANCE AND SHALL BE DEMARCATED IN THE FIELD PRIOR TO COMMENCEMENT OF CONSTRUCTION. BIOFILTER INSTALLATION NOTES 1. CONSTRUCTION OF THE BIORETENTION AREA MAY ONLY BEGIN AFTER THE ENTIRE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED WITH VEGETATION. IT MAY BE NECESSARY TO BLOCK CERTAIN CURB OR OTHER INLETS WHILE THE BIORETENTION AREA IS BEING CONSTRUCTED. THE PROPOSED SITE SHOULD BE CHECKED FOR EXISTING UTILITIES PRIOR TO ANY EXCAVATION. 2. THE DESIGNER AND THE INSTALLER SHOULD HAVE A PRECONSTRUCTION MEETING, CHECKING THE BOUNDARIES OF THE CONTRIBUTING DRAINAGE AREA AND THE ACTUAL INLET ELEVATIONS TO ENSURE THEY CONFORM TO ORIGINAL DESIGN. SINCE OTHER CONTRACTORS MAY BE RESPONSIBLE FOR CONSTRUCTING PORTIONS OF THE SITE, IT IS QUITE COMMON TO FIND SUBTLE DIFFERENCES IN SITE GRADING, DRAINAGE AND PAVING ELEVATIONS THAT CAN PRODUCE HYDRAULICALLY IMPORTANT DIFFERENCES FOR THE PROPOSED BIORETENTION AREA. THE DESIGNER SHOULD CLEARLY COMMUNICATE, IN WRITING, ANY PROJECT CHANGES DETERMINED DURING THE PRECONSTRUCTION MEETING TO THE INSTALLER AND THE PLAN REVIEW/INSPECTION AUTHORITY. 3. TEMPORARY E&S CONTROLS ARE NEEDED DURING CONSTRUCTION OF THE BIORETENTION AREA TO DIVERT STORMWATER AWAY FROM THE BIORETENTION AREA UNTIL IT IS COMPLETED. SPECIAL PROTECTION MEASURES SUCH AS EROSION CONTROL FABRICS MAY BE NEEDED TO PROTECT VULNERABLE SIDE SLOPES FROM EROSION DURING THE CONSTRUCTION PROCESS. 4. ANY PRE-TREATMENT CELLS SHOULD BE EXCAVATED FIRST AND THEN SEALED TO TRAP SEDIMENTS. 5. EXCAVATORS OR BACKHOES SHOULD WORK FROM THE SIDES TO EXCAVATE THE BIORETENTION AREA TO ITS APPROPRIATE DESIGN DEPTH AND DIMENSIONS. EXCAVATING EQUIPMENT SHOULD HAVE SCOOPS WITH ADEQUATE REACH SO THEY DO NOT HAVE TO SIT INSIDE THE FOOTPRINT OF THE BIORETENTION AREA. CONTRACTORS SHOULD USE A CELL CONSTRUCTION APPROACH IN LARGER BIORETENTION BASINS, WHEREBY THE BASIN IS SPLIT INTO 500 TO 1,000 SQ. FT. TEMPORARY CELLS WITH A 10-15 FOOT EARTH BRIDGE IN BETWEEN, SO THAT CELLS CAN BE EXCAVATED FROM THE SIDE. 6. IT MAY BE NECESSARY TO RIP THE BOTTOM SOILS TO A DEPTH OF 6 TO 12 INCHES TO PROMOTE GREATER INFILTRATION. 7. PLACE GEOTEXTILE FABRIC ON THE SIDES OF THE BIORETENTION AREA WITH A 6-INCH OVERLAP ON THE SIDES. IF A STONE STORAGE LAYER WILL BE USED, PLACE THE APPROPRIATE DEPTH OF #57 STONE ON THE BOTTOM, INSTALL THE PERFORATED UNDERDRAIN PIPE, PACK #57 STONE TO 3 INCHES ABOVE THE UNDERDRAIN PIPE, AND ADD APPROXIMATELY 3 INCHES OF CHOKER STONE/PEA GRAVEL AS A FILTER BETWEEN THE UNDERDRAIN AND THE SOIL MEDIA LAYER. IF NO STONE STORAGE LAYER IS USED, START WITH 6 INCHES OF #57 STONE ON THE BOTTOM, AND PROCEED WITH THE LAYERING AS DESCRIBED ABOVE. 8. OBTAIN SOIL THE MEDIA FROM A QUALIFIED VENDOR, AND STORE IT ON AN ADJACENT IMPERVIOUS AREA OR PLASTIC SHEETING. AFTER VERIFYING THAT THE MEDIA MEETS THE SPECIFICATIONS, APPLY THE MEDIA IN 12-INCH LIFTS UNTIL THE DESIRED TOP ELEVATION OF THE BIORETENTION AREA IS ACHIEVED. WAIT A FEW DAYS TO CHECK FOR SETTLEMENT, AND ADD ADDITIONAL MEDIA, AS NEEDED, TO ACHIEVE THE DESIGN ELEVATION. 9. PREPARE PLANTING HOLES FOR ANY TREES AND SHRUBS, INSTALL THE VEGETATION, AND WATER ACCORDINGLY. INSTALL ANY TEMPORARY IRRIGATION. 10. PLACE THE SURFACE COVER IN BOTH CELLS (MULCH, RIVER STONE OR TURF), DEPENDING ON THE DESIGN. IF COIR OR JUTE MATTING WILL BE USED IN LIEU OF MULCH, THE MATTING WILL NEED TO BE INSTALLED PRIOR TO PLANTING (STEP 9), AND HOLES OR SLITS WILL HAVE TO BE CUT IN THE MATTING TO INSTALL THE PLANTS. 11. INSTALL THE PLANT MATERIALS AS SHOWN IN THE LANDSCAPING PLAN, AND WATER THEM DURING WEEKS OF NO RAIN FOR THE FIRST TWO MONTHS. 12. REFER TO C19 FOR ADDITIONAL DETAILS. BAYFLITER BMP INSTALLATION NOTES THE FOLLOWING INSTALLATION PRACTICES SHALL BE FOLLOWED AT THE SITE. 1. FOLLOW ALL MANUFACTURER GUIDELINES SPECIFIED ON SHEET C16 AND C17. 2. EXCAVATE THE BAYFILTER PRACTICE TO THE DESIGN DIMENSIONS FROM THE SIDE, USING A BACKHOE OR EXCAVATOR. THE FLOOR OF THE PIT SHOULD BE COMPLETELY LEVEL, EQUIPMENT SHALL BE KEPT OFF THE FLOOR AREA TO PREVENT SOIL COMPACTION. 3. CORRECTLY INSTALL FILTER FABRIC ON THE TRENCH SIDES. LARGE TREE ROOTS SHOULD BE TRIMMED FLUSH WITH THE SIDES OF INFILTRATION TRENCHES TO PREVENT PUNCTURING OR TEARING OF THE FILTER FABRIC DURING SUBSEQUENT INSTALLATION PROCEDURES. WHEN LAYING OUT THE GEOTEXTILE, THE WIDTH SHOULD INCLUDE SUFFICIENT MATERIAL TO COMPENSATE FOR PERIMETER IRREGULARITIES IN THE TRENCH AND FOR A 6-INCH MINIMUM OVERLAP AT THE TOP OF THE TRENCH. THE FILTER FABRIC ITSELF SHOULD BE TUCKED UNDER THE SAND LAYER ON THE BOTTOM OF THE TRENCH. STONES OR OTHER ANCHORING OBJECTS SHOULD BE PLACED ON THE FABRIC AT THE TRENCH SIDES, TO KEEP THE TRENCH OPEN DURING WINDY PERIODS. VOIDS MAY OCCUR BETWEEN THE FABRIC AND THE EXCAVATED SIDES OF A TRENCH. NATURAL SOILS SHOULD BE PLACED IN ALL VOIDS, TO ENSURE THE FABRIC CONFORMS SMOOTHLY TO THE SIDES OF EXCAVATION. 4. SCARIFY THE BOTTOM OF THE BAYFILTER BMP, AND INSTALL FILTER STONE PER SPECS. 5. PLACE STORAGE CHAMBERS AT SPECIFIED INVERT. CHAMBERS MUST BE FLAT WITH A 0% SLOPE. BIOFILTER INSTALLATION CHECKLIST ❑ CONTRIBUTING DRAINAGE AREAS HAVE BEEN ADEQUATELY STABILIZED WITH A THICK LAYER OF VEGETATION AND EROSION CONTROL MEASURES HAVE BEEN REMOVED. ❑ VERIFY THE PROPER COVERAGE AND DEPTH OF MULCH, VEGETATION, OR SOIL MATTING HAS BEEN ACHIEVED FOLLOWING CONSTRUCTION, BOTH ON THE FILTER BED AND THE SIDE -SLOPES. ❑ INSPECT THE PRE-TREATMENT FORBAYS AND FILTER STRIPS TO VERIFY THAT THEY ARE PROPERLY INSTALLED, STABILIZED, AND WORKING EFFECTIVELY BEFORE OPENING THE FACILITY TO RUNOFF. ❑ CHECK THAT OUTFALL PROTECTION/ENERGY DISSIPATION MEASURES AT CONCENTRATED INFLOW AND OUTFLOW POINTS ARE STABLE. ❑ FOLLOW-UP INSPECTION AND AS -BUILT SURVEY/CERTIFICATION HAS BEEN SCHEDULED. ❑ GPS COORDINATES HAVE BEEN DOCUMENTED FOR ALL BIOFILTRATION & RAIN GARDEN PRACTICES ON THE PARCEL. BAYFILTER INSTALLATION CHECKLIST ❑ PRE -CONSTRUCTION MEETING WITH THE CONTRACTOR DESIGNATED TO INSTALL THE BMP HAS BEEN CONDUCTED. ❑ IMPERVIOUS COVER HAS BEEN CONSTRUCTED/INSTALLED AND AREA IS FREE OF CONSTRUCTION EQUIPMENT, VEHICLES, MATERIAL STORAGE), ETC. ❑ ALL PERVIOUS AREAS OF THE CONTRIBUTING DRAINAGE AREAS HAVE BEEN ADEQUATELY STABILIZED WITH VEGETATION. ❑ STORMWATER HAS BEEN DIVERTED AROUND THE AREA OF THE INFILTRATION PRACTICE AND PERIMETER EROSION CONTROL MEASURES TO PROTECT THE FACILITY DURING CONSTRUCTION HAVE BEEN INSTALLED. ❑ WHEN ALL THIS HAS BEEN ACHIEVED, FOLLOW INSTALLATION GUIDELINE ON SHEET C16. ❑ NOTIFY DESIGN ENGINEER WHEN PROPER GRADES AND THE REQUIRED GEOMETRY FOR BMP INSTALLATION ARE ACHIEVED. ❑ CERTIFICATION OF EXCAVATION INSPECTION: INSPECTOR SHALL CERTIFY THE SUCCESSFUL COMPLETION OF THE EXCAVATION STEPS LISTED ABOVE BEFORE INSTALLATION CONTINUES. ❑ FOLLOW-UP INSPECTION AND AS -BUILT SURVEY/CERTIFICATION HAS BEEN SCHEDULED. ❑ AS -BUILT GPS COORDINATES HAVE BEEN DOCUMENTED FOR BMP. FIRST -YEAR BMP MAINTENANCE SUCCESSFUL ESTABLISHMENT OF BMPS REQUIRES THAT THE FOLLOWING TASKS BE UNDERTAKEN IN THE FIRST YEAR FOLLOWING INSTALLATION: ❑ INITIAL INSPECTIONS. FOR THE FIRST 6 MONTHS FOLLOWING CONSTRUCTION, THE SITE SHOULD BE INSPECTED AT LEAST TWICE AFTER STORM EVENTS THAT EXCEED 1 /2 INCH OF RAINFALL. ❑ SPOT RESEEDING. INSPECTORS SHOULD LOOK FOR BARE OR ERODING AREAS IN THE CONTRIBUTING DRAINAGE AREA OR AROUND THE BIORETENTION AREA, AND MAKE SURE THEY ARE IMMEDIATELY STABILIZED WITH GRASS COVER. ❑ FERTILIZATION, ONE-TIME, SPOT FERTILIZATION MAY BE NEEDED FOR INITIAL PLANTINGS. ❑ WATERING. WATERING IS NEEDED ONCE A WEEK DURING THE FIRST 2 MONTHS, AND THEN AS NEEDED DURING FIRST GROWING SEASON (APRIL-OCTOBER), DEPENDING ON RAINFALL. ❑ REMOVE AND REPLACE DEAD PLANTS. SINCE UP TO 10% OF THE PLANT STOCK MAY DIE OFF IN THE FIRST YEAR, CONSTRUCTION CONTRACTS SHOULD INCLUDE A CARE AND REPLACEMENT WARRANTY TO ENSURE THAT VEGETATION IS PROPERLY ESTABLISHED AND SURVIVES DURING THE FIRST GROWING SEASON FOLLOWING CONSTRUCTION. THE TYPICAL THRESHOLDS BELOW WHICH REPLACEMENT IS REQUIRED ARE 85% SURVIVAL OF PLANT MATERIAL AND 100% SURVIVAL OF TREES. ❑ FOR THE BAYFILTER SYSTEM, REFER TO BAYFILTER MAINTENANCE ON C16 & C18. MINIMUM STANDARDS (MS) All applicable Virginia Erosion and Sediment Control Regulations and Minimum Standards shall be adhered to during all phases of construction. These include, but are not limited to the following: 1. STABILIZATION OF DENUDED AREAS: Permanent or temporary soil stabilization shall be applied to bare areas within seven days after final grade is reached on any portion of the site. Temporary soil stabilization shall be applied within seven days to denuded areas that may not be at final grade, but will remain dormant or undisturbed for longer than 30 days. Permanent stabilization shall be applied at areas that are to be left dormant for more than 1 year. 2. STABILIZATION OF SOIL STOCKPILES: During construction of the project, soil stockpiles shall be stabilized or protected with sediment trapping measures. The applicant is responsible for temporary protection and permanent stabilization of all soil stockpiles on site as well as soil intentionally transported from the project site. 3. PERMANENT VEGETATIVE COVER A permanent vegetative cover shall be established on denuded areas not otherwise permanently stabilized. Permanent vegetation shall not be considered established until a ground cover is achieve that, in the opinion of the county Inspector, is uniform and mature enough to survive to inhibit erosion. 4. TIMING & STABILIZATION OF SILT TRAPPING MEASURES: Sediment basins and traps, perimeter dikes, sediment barriers and other measures intended to trap sediment shall be constructed as a first step in any land disturbing activity and shall be made functional before upslope land disturbance takes place. 5. STABILIZATION OF EARTHEN STRUCTURES: Stabilization measures shall be applied to earthen structures such as dams, dikes and diversions immediately after installation. 6. SEDIMENT TRAPS AND BASINS: A sediment basin shall control surface runoff from disturbed areas that is comprised of flow from drainage areas greater than or equal to three acres. The sediment basin shall be designed and constructed to accommodate the anticipated sediment loading for the land disturbing activity. The outfoll device or system device shall take into account the total drainage area flowing through the disturbed area to be served by the basin. 7. CUT AND FILL SLOPES: Cut and fill slopes shall be designed and constructed in a manner that will minimize erosion. Slopes that are found to be eroding excessively within one year of permanent stabilization shall be provided with additional slope stabilizing measures until the problem is corrected. & CONCENTRATED RUN-OFF DOWN CUT OR FILL SLOPES: Concentrated runoff shall not flow down cut or fill slopes unless contained within an adequate temporary or permanent channel, flume, or slope drain structure. 9. WATER SEEPS FROM A SLOPE FACE: Whenever water seeps from a slope face, adequate drainage or other protection shall be provided. 10. STORM SEWER INLET PROTECTION: All storm sewer inlets that are made operable during construction shall be protected so that sediment -laden water cannot enter the conveyance system without first being filtered or otherwise treated to remove sediment. 11. STABILIZATION OF OUTLETS: Before newly constructed stormwater conveyance channels are made operational, adequate outlet protection and any required temporary or permanent channel lining shall be installed in both the conveyance channel and receiving channel. 12. WORK IN LIVE WATERCOURSES: When work in a live watercourse is performed, precautions shall be taken to minimize encroachment, control sediment transport and stabilize the work area to the greatest extent possible during construction. Nonerodible material shall be used for the construction of causeways and cofferdams. Earthen fill may be used for these structures if armored by nonerodible cover materials. 13. CROSSING A LIVE WATERCOURSE: When a live watercourse must be crossed by construction vehicles more than twice in any six month period, a temporary stream crossing constructed of nonerodible materials shall be provided. 14. APPLICABLE REGULATIONS: All applicable federal, state and local regulations pertaining to working in or crossing live watercourses shall be met. 15. STABILIZATION OF BED AND BANKS The bed and banks of a watercourse shall be stabilized immediately after work in the watercourse is completed. 16. UNDERGROUND UTILITIES: Underground utilities shall be installed in accordance with the following standards in addition to other criteria: a.No more than 500 linear feet of trench may be opened at one time. b.Excavated material shall be placed on the uphill side of trenches c. Effluent for dewatering operations shall be filtered or passed through approved sediment trapping device, or both, and discharged in a manner that does not adversely affect flowing streams or offsite property. d.Material used for backfilling trenches shall be properly compacted in order to minimize erosion and promote stabilization. e.Restabilization shall be accomplished in accordance with these regulations. f. Applicable safety regulations shall be complied with. 17. CONSTRUCTION ACCESS ROUTES: Where construction vehicle access routes intersect paved public roads, provisions shall be made to minimize the transport of sediment by vehicular tracking onto paved surfaces. Where sediment is transported on to a public road surface, the road shall be cleaned thoroughly at the end of each day. Sediment shall be removed by shoveling or sweeping and transported to a sediment control disposal area. Street washing shall be allowed only after sediment is removed in this manner. This provision shall apply to individual lots as well as to larger land disturbing activities. 18.TEMP0RARY E&S CONTROL MEASURE REMOVAL: All temporary erosion and sediment control measures shall be removed within 30 days after final site stabilization or after temporary measures are no longer needed, unless otherwise authorized by the local program authority. Trapped sediment and the disturbed soil areas resulting from the disposition of temporary measures shall be permanently stabilized to prevent further erosion and sediment. 19. ADEQUACY OF RECEIVING CHANNELS: Properties and waterways downstream from the development site shall be protected from sediment deposition, erosion and damage, due to increases in volume, velocity and peak flow rates of stormwater runoff for the stated frequency storm of 24-hour duration. y* I C �� d i U JU IN M. SHTMP ic. No.. 45183 0 ° \/ / 0 \ ° /° ' I 0 \ // 0 / INSTALL INLET ° ° cBASE & RISER. OVER TOPS. ( YIP.) A-Nr / / o SHED q SEQUENCE OF CONSTRUCTION - STAGE 1 1. INSTALL CONSTRUCTION ENTRANCES OFF RIO ROAD AS SHOWN. INSTALL SILT FENCE SHOWN. 2. INSTALL STORM SEWER "SECTION A". REFER TO C15 FOR OFFSITE STORM INSTALLATION. 3. WHEN "SECTION A" STORM HAS BEEN INSTALLED AS SHOWN, CONTACT ENGINEER AND ALBEMARLE COUNTY TO INSPECT. AFTER THIS AREA IS STABILIZED, REMOVE CONSTRUCTION ENTRANCE ON PARCEL AI A. 3. INSTALL DIVERSIONS, SILT FENCE, INLET PROTECTION, & SEDIMENT BASIN. 4. CONTACT DESIGN ENGINEER AND THEN COUNTY INSPECTOR FOR INSPECTIONS. 5. WHEN ALL PARTIES HAVE APPROVED FIELD CONDITIONS, BEGIN MASS GRADING, STARTING AS SHOWN ON THIS SHEET. 6. MAINTAIN PERIMETER CONTROLS DURING TRANSITION INTO STAGE 2. SOIL EROSION & SEDIMENT CONTROL SYMBOLS SYMBOL N0. TITLE KEY 3.02 CONSTRUCTION ENTRANCE CE 3.03 CONSTRUCTION ROAD STABILIZATION CRS x x x x 3.05 SILT FENCE SF 3.07 INLET PROTECTION IP 3.09 TEMPORARY DIVERSION DIKE DD r / / 3.13 TEMPORARY SEDIMENT TRAP UT `v*k D D C1 0 0 / ' /��`� 3.18 OUTLET PROTECTION OP PO I/ / I ' 0 c0-0 �� 10 / A POL II I ✓ / I �\ / /- / 3.31 TEMPORARY SEEDING OD �I/ P c w v '�'11, 8 , ° / �, TS // i/ / ci o \ 3.32 PERMANENT SEEDING PS T� ♦ PS X , M 3.35 MULCH MU �T ` I / ° / ° I I ` o - ;P'% D Gx ° I -- w C1 3.39 DUST CONTROL DC r I � I , �pw- ♦� 0 . CA / < Gam. / o - � ft - ♦ I,� �" U JLI. IN M. SHTMP A4 I I ° \ \ O o0 0 ♦ w �w w �w SAFETY FENCE rc. No. 45183 A3 \ ` I GIN \ \ _ ` � w — w �� I \ \ — _ -_ Tw �w _ TREE PROTECTION FENCING C A I V A' v ` �'G v \ I w.� ' \ Chi I V A \ �9 � `-'o \ 430 � � y� - \ � — w 8 I I p� I I �I \ I ° ° A \�qya�-�` �W _w C1'' I I �, I v \ vRS v v /� -w xw18„ RWSq LIMITS OF DISTURBANCE �\ \ C, d? \ 1 6� fin' \ p \ I O uv�am v V �� ono P' V 1\ \ 1 I \ Y 1! \ \ \ \ V A �� o l0 / / w.rr WL \ 0 \ • \ \ — — _--° �w BASIN DRAINAGE AREA i _ �. w -- w HIV \ \ I \ \ \ �°,a--- / 450 — Tw W \ \ ELL \ 1 41 A / arq----- CD 0 i _/� % v \ —�\ — v% —y_ ---___i _ -_/ _A �/ A \ AA \/ /\ A \\A A \A� `AV A�\I I1�I I I II III II I II I I I ■" 40\ 8 6 pP�0" °UD�1 o RI I 0 0 HSG w/O CHU � —w o au,01 I % I ' O Ia� o �CHU 0 °w-_ 400 °`'; os°,—°,,—°''—°—°uvu l�—°�u«a—aiJ—a—- j DEMO PORTIONS OF DRIVEWAY G l )\ I - ANCONF�ICT WITH BASIN. � / yv �w w � W w �w / 40 / Ew ' 1 w RWS4 z- l--- WL -7 7 C C.( WI L411 D PI L v `� v V 1 —- SB470 fiQP 38�. T 8 3 �" ; / I / / / I G ( I \ �� I v �kN/V=385 19II �1 N 9 .7 / / l / l I l�j� / / / I 0 utiu 2 2 / / / \ \ III I 1 �� o / / // to SEDIMENT BASIN ���\ ° 21 B ° \ ` ° RIVE / / p v v DRAINAGE AREA H � B V °— — — o — , '�°NO— ,, \R _ I /� I afl, �� / / '' g /' /' /' S 4■0,�0 ACR S I --C- � v - � -- � �470. o STOCKPILE � / 1 X I � � _r 0 °sHfp /NN � AREA o$ -0 x _9 p / o ° _ x Goai/ /° / // / / i i^f 0 ♦ v ° - - - �� -- // � / � � � ° I � "`� - oWPM/A �/�/ i � n o II II \ ♦�° �HAG �/ ; -0--- ----- -- — — — -- I t� �_p------ '� - - / I / ICI I I \ / / / I / ♦ _ t \ 0 � / / 3 0O�W0AIx QD - n ET 7 � \_�41 414. _ \ ° / N� ----- / - - -'`� / / X4 . I C13 II I I II II I I 1 1 II II �� 7cP / / // O I I I I I Al1 - 1 , ' / r J' / / / --------- / / X 1 II �� l / /rc ,1 1 I 47 D '' !• ` co I I I HSG A /C o D� �p I �, , A 0 I \ \ \ (n 7 \ \ 1 1 1 1 1 I I I I \ \\ U� *�. 1 -----1 Cp mrTi � I `I cn \ \\ V 1 I 1 1 I I 410 �� ���\ $ Z 0 Cl 6> v - D D � � / � 1 INV. 434.29 O 'x h i 7- " _ 8 --- \ \ — - - - - - - �, PRESERVED SLOPES --430_ - - _--__--- --- \'------------ -� - - - , - - - - - - - - - - - - -- c, -------------- -=-- / LEGEND / __-\ -------- - ROP PAVED DITCH 41� ' i / _ i 412 TATE /ROUTE 631 0 RIO OAD EAST - - _ PRESERVED SLOPES n SURVEYED < 25% INV. 418.22' • • 30 60 •• Scale: 1 "=30' fi o i / / 0 \ — � 0 \¢ G 1 o % / / o i / o / 0 /0 / '/ % CONTRACTOR SHALL ENSURE RIGHT—OF—WAY SHED / �"' / / �/ / / / '� DIVERSION IS PROPERLY MAINTAINED AND VERIFIED SEQUENCE OF CONSTRUCTION - STAGE 2 1. MOVE CONSTRUCTION ENTRANCE TO NEW LOCATION SHOWN ON THIS SHEET AFTER STAGE 1 AREA IS GRADED. 2. INSTALL ADDITIONAL PERIMETER CONTROLS AS SHOWN AS GRADING PROCEEDS. CONTACT DESIGN ENGINEER TO INSPECT AND CONFIRM PROPER INSTALLATION. 3. INSTALL UTILITIES AND GRADE ROAD AREAS. 4. MASS GRADING SHOWN ON THIS SHEET REPRESENTS INTERMEDIATE GRADES AND CAN BE ADJUSTED IN THE FIELD. 5, MAINTAIN SEDIMENT BASIN UNTIL ALL UPSTREAM AREAS ARE STABILIZED. CONTACT BOTH DESIGN ENGINEER AND COUNTY INSPECTOR BEFORE BASIN IS REMOVED. FUNCTIONAL AFTER o / C EVERY WORKDAY /�� // /l v ll 37o °� -CONTRACTOR ° LAYDOWN � 9 ' / I STORAGE AREA DD 8 s / 9��� 4v POW I/ 1 A / 1/ v� �C. �� I /� �/ vv POL °F I I I t' I �\ I 1 / / o o� I / c ;� \X 18•. % 8 / w wsq D V / \ A5 �� I V �� l W W W \ A4 \� \\ i l� `96 1 \\ o� \ \ \\ DO NOT INSTALL LOVER ��Ge 1 w 7w �w / Ii i� �sr I _ A \ A� v vPARKINvG UNTIL ALL v — — — F i T w w og0 �REA UPSTREAM THE \ — — 1F w D D 8 lopI I I l 90 I I 1 1 1 \ o`� \ e \ of \.� ° BASIN IS\ STABILIZED \\ - - _430 �GE� — _ _ w w / I I w "w \ I I I \\ 4 AND BASItV\IS REMQVE —� / AGE UGEUGE_w w w _ C1 x .,' `\ v' �\ I II I - \`I\ \ O \ I \ \ \ \\ \ I / -- couGe =cep ' �U�E / w _w18 RWS WL \ — — cE - OICE., UG W 0 — — — — — — F,� UGE ucE _ w rah W SOIL EROSION & SEDIMENT CONTROL SYMBOLS SYMBOL N0. TITLE KEY w� jo I W N w y. U JU IN M. SHIMP >' ic. No.. 45183 .-Vtflzo \ ELL A E -I \ \ -\ \ - - \ 1 \1 \ 6 \ \ - - - 450 —GEC AGE T w w - - \ �� I I I U' I �\ / - - >- - ]� W 8 \ I V I I V � -' a E 2 \ \ O �Ge 77--l- T �' w /WELL- V A �� \ A I �Oa 6 �M.-' b_ W Oct / �W 4�0 " S � '" ��� 11 v W \ t T v �I � I f `moo G AGE w w EX� " RW Liz �W 8 /W WEB // A\ I I `0 AGE G �w �Nz 7w 470 �W�� ) I r _ _ v _ / / �� , // ,� // // I I \ I �1 I �pO�O�FC / / T� C1 ` / // / / I I w w o-w I I \ vv ---_ _ -- _ 470 ��i � � � � �� � // // I I ��I � I �� � � � e— � T I" 1 w I� I T 10 � �— — — — —__ ----, sHIEP �/ / // / � // // j I °��� 8 MU 1 /� — F 5 /� / � C1 w w w w w ,� I _ _--- - - - am- cn, w _ a m � 6 T s��j� 0 ��w N »8H2 4V C1 w 1\a 1 / PHASE 2 � / / `- ---- __---- B ` STOCKPILE SF / / \• 12 •� __ — __- — / PHASE 2 W M/ I -----�STOCKPILE _ — — 3 I 3 / I v _----- ---------- --------___- II / ° 1 _ — — — — — —----------- — — — — — — _ _ i _ — ��4 �� — — — — — II C1 —// i// / I s\F W�. , _ ,= -- — � � � PHASE 2 I / I DD STOCKPILE \ V I / / / 10 �— C1 1 Aso \ W I I I I I I I I C1 o 7 to /� w—w� I3 I ,i C1 �' // I 6B T // / I I 1 \ 1 I / M I / 1 I I A �� N I 5 \ / c w w o 0 0 -P c1 � cb �b L0 (0 w w � , o A v � � A � \ 1 I �� '� 4Cb V o N P �' 53 1 °' \ \� V I 1 1 I I I I \ �\\ \ R, D AV 1 I G2 �w _w �� 1 A I I I I V� I I I 41p `� $ -a ��� I Ivy lop \ lop \ \\� \`y ` \ \� -,.`�` i ► a� �� ��� t !� t �` I PRESERVED SLOPES \ . 4 i _- - - - - - - 43 0- I 410 OJ' \ \\ 30 0 30 60 90 Scale: 1 "=30' , o /o \¢ o 4E, SP CE A11 ° / 7377SF ° o / SHED / / /� / / / o 10 o C1 PHASE 3 � ' ' / / / STOCKPILE /'//� / / l/ 6 1 �� \- // 9 / 1 \ r A6 7 / \V/ I I / // v �� co" 3 �' w ww / /� v / / ti / /7 / �o ��pro 5� / t- 9 SEQUENCE OF CONSTRUCTION - STAGE 3 1. INSTALL SILT FENCE WHERE NEEDED FOR ANY FINAL PERIMETER GRADING (PRIMARILY FOR REMOVAL OF SEDIMENT BASIN AND DIVERSIONS ALONG THE PERIMETER) 2. AFTER SEDIMENT BASIN IS REMOVED, INSTALL STORMTECH BMP AND LOWER PARKING AREA. DO NOT INSTALL STORM CARTRIDGES UNTIL SITE HAS BEEN ENTIRELY STABILIZED AND SYSTEM HAS BEEN CLEANED OUT. 3. WHEN SITE HAS BEEN STABILIZED, HOUSE CONSTRUCTION MAY BEGIN. 4. DURING HOUSE CONSTRUCTION, AREAS THAT ARE NOT BEING DISTURBED MUST REMAIN STABILIZED. INSTALL SILT FENCE PROTECTION FOR LOTS UNDER CONSTRUCTION. 5. IMPORTANT: RAIN GARDENS SHALL BE INSTALLED LOT BY LOT. DO NOT INSTALL RAIN GARDENS UNTIL EACH RESPECTIVE HOUSE HAS BEEN CONSTRUCTED. THE RAIN GARDEN UNDERDRAINS SHALL BE CONNECTED TO THE STORM DRAINS WITH INSERTA—TEES AS THE FINAL STEP OF LOT CONSTRUCTION. CONTACT DESIGN ENGINEER FOR INSPECTIONS OF THE RAIN GARDENS. 6. DO NOT INSTALL BIOFILTERS UNTIL ALL UPSTREAM AREAS ARE PERMANENTLY STABILIZED. / ,� p I J w w \ (A5 I 1 5F1� /,� ,� v �l�w�w v A4 � � A �� / o \ �� gF ucE w � w — w IN 7— IN I I O I 1 1 \ O �-e..; A �� �� F 4� j �� i — _ — — uc�� uc ucE — / w IN I I I V I I u A l 1 \ — / o w IN W �\ CA co 1 C E \ / �K \ v' 00 < O `/ O _ \ / p \ O / \� 6E U E / r SOIL EROSION & SEDIMENT CONTROL SYMBOLS SYMBOL N0. TITLE KEY 3.02 CONSTRUCTION ENTRANCE CE 3.03 CONSTRUCTION ROAD STABILIZATION CRS x x x x 3.05 SILT FENCE SF ~ N 3.07 INLET PROTECTION IP N w 3.09 TEMPORARY DIVERSION DIKE DD i I => 3.13 TEMPORARY SEDIMENT TRAP ST w = w I- 0 3.18 OUTLET PROTECTION OP W N Q w = � U TS 3.31 TEMPORARY SEEDING OD PS 3.32 PERMANENT SEEDING PS M 3.35 MULCH MU DC 3.39 DUST CONTROL DC 3.36 SOIL STABILIZATION BLANKET SSB JU INM. SHIMP je. No. 45183 SAFETY FENCE TREE PROTECTION FENCING LIMITS OF DISTURBANCE V A \ A N ' � h� �Z 6A �� r — — —� ice 1 W rn A A \ PROVIDE EC-2 MATTING FOR Z 2 �� �� ii �i', ii �`� ; ; np w / �-k I 7A \ �> / — _ _ cE>— J• W I� \ — ,> iii E2 \ \< o O 5 CZ I / / ce W \ W PS IN THIS AREA AS NEEDED. F \�� \ 6g SA- - L'w_ —� j� �� \ �� /1 \ ^J 1 Spo-J� \ / I I SF yy v W '5100 400 - \ r - w �� i \ a 2B $B o c— / ids r SPAC _w 1 �i a �E � \ � —jW `W ad \ B2 \ e E3 — — — W IN � � I A,) I � -�. 6B \ � � � ��� (O U� u� - � / / / / / I I i ��r� r / �. �� - 1 O w w % I O� 76 470 �� W / / / , N�' r /' / / / / III fib r /' AB I 3 TORY TH j �9 I l `� `� `�� �.�I I I / I ` `� �p Q��j © v / III m i.,'r / 1 9A 1 i 10 ^� w\ �o� ° 4� i 1 68 SF &4 O° e�/ /� �� a, 3 STORY Tl l pp P S 704 SF,- w y . ` 1 � �w _w I � �� yr � 1 3 � -STORY SF — — — j � 7 ' W . j / I — I 1232 o _ �I Al �' I STORY TH I 9 I 3 STORY TH 1 / r w �� ZQ' I 704 SF 11A SHED 5 _ I 1 / I 1 � / i� _ / � / %f� � o Ga y , ' o r J / 3-sTo TH O OPEN SPA, N P vs �1 / 704 SF 12A- —�� / /'�— — --- / o r 1 / - r / — �� '— 68 SF 11B --- — — — 25359 4 /'i� � � ,ii� I C1 � 7 I _ — I � � �� � 1 3 STORY TH 1 I / 19 1 ' / N �P A f F f� I I I 460 I — ° i 704 1 I / r �� / I —/ / 0 E �OMM HousE 2 I ! 5-- / r �I o 1 1 � PHASE 3 ( i / 1 STORY TH SPACE I .'.'.. F C1 % 3 8 STOCKPILE ONLY lsoo SF 76 — / I _ 13 0� I --_ 172 R 1 II i I / / I I � I / / / / / / ✓ . / __ 1 3 2�! _ � ' o�— — — SF — _ _ _ _ -_--_�— SIGN ---------- — 6p 1.5% 2. — — — -- STORY TH/ � j �-� \.1V 1 1 �6� � 1 � 7!��' i� 1 O � � � 968 SF 1 i��n p� l % S OR o� V i 3 "SO \ a �6 % / i i \ / C1 i / .•1. i 8 sp IN �. �8 o/ ��\ I _ I 9 � ° i � STORY TH 1 i , � r�i � � i � �� / �' i - I I / O i - F / I 3 S � — I 8 s T- i W i 1; 76 1 A 1 ro 14B ` / 7 d- i � RY i I D TS w _3 e8 SF ry �' �� • I II I II I I II I I 1 STORY TH/ v - 1 704 F 15A i 7B / / - I I I I I I 1 I �ij OF / 1 768 sF/ 2 STORY 5 1 I I 1 3 I 1j�^, �/ � � / � U Ps704 SF / 1 0 o A i C �� �' i,� c� o p P \� \ I I a COMMON HOUSE �p�4� � p(r(\:r � o NQ0 (A \ �' o \� v �� \ ��� V A \ �� 26 1 I /, 3 STORY F I T ) \ 1_ GUEST LODGING V A V 11 1 1 II I I I 410, \ ���� 10 1056 S jl 1 1.815 SF I w / \ V A \ V I I C1 w��j I I I I �" I 1 0 ITT_ Aso INN \ - f _ OESP.ACEB ` \ v ��`��\�� \ �\ V 9% p V v v / I i\\\\1\1 AV A \ — A � .� � � � / 42�i6�SF�' / 41 PRESERVED SLOPES s- l-440 — _ — '-z-=- --_ -- — — — — — — — STATE /ROUTE 631 0 RIO � OAD EAST - - 30 0 30 60 90 C L e SDR-26 SAN. 3 -------- 18" PP STORM A4 _ _ -- / ------ rNEW 20' PUBLIC DRAINAGE ESMT i 47D HSG A SPACE a 173 1-SF \ EW ROW / o SWM FOREST/OPEN- c - - - SPACE AREk1. s 0.2,ACRES HSG A- _ - _ - , / Z 0 /I In - I u CONC. LNDWALL TOP=387_80 INV=385.29 POWEI. POLE oG2�� �aMP `Ib \ , 47D • a A6C;> HSG A `Gc B" STEEL SIDEWALK F11. FLUME A6 e °�F 4# NEW 10' PUBLIC Pp \ GCF DRAINAGE ESMT 4f .� 1 A 14 <p �N _ G , i� 2 A A W n ° w _ W _.4 w RAIN GARDEN DIMENSIONS GARDEN # LENGTH WIDTH AREA A-1 11.0 6.0 66.0 A-2 9.5 7.0 66.5 A-3 9.5 7.0 66.5 A-4 9.5 7.0 66.5 A-5 9.5 7.0 66.5 A-6 9.5 7.0 66.5 A-7 9.5 7.0 66.5 A-8 9.5 7.0 66.5 A-9 9.5 7.0 66.5 A-10 9.5 7.0 66.5 A-11 9.5 7.0 66.5 A-12 9.5 7.0 66.5 A-13 9.5 7.0 66.5 A-14 9.5 7.0 66.5 A-15 9.5 7.0 66.5 A-16 9.5 7.0 66.5 A-17 9.5 7.0 66.5 A-18 9.5 7.0 66.5 A-19 9.5 7.0 66.5 A-20 9.5 7.0 66.5 A-21 9.5 7.0 66.5 A-22 9.5 7.0 66.5 A-23 9.5 7.0 66.5 , ... I .. .. .. III �' RAIN GARDENS. 2" ABOVE STONE BOTTOM ~ 6" KEY -IN AT B"-12" HOPE COLLECTOR DRAIN. IIr; BOTTOM OF STONE 1 ROOF DOWNSPOUT DETAIL 2 TYP. RAN GARDEN DETAIL C6 NOT TO SCALE C6 NOT TO SCALE. ALL ARE LEVEL 1 BMP'S NOTE: RAIN GARDEN DIMENSIONS GARDEN # LENGTH WIDTH AREA B-1 10.0 8.0 80.0 B-2 13.5 6.0 81.0 B-3 14.5 5.5 79.8 B-4 14.5 5.5 79.8 B-5 13.5 6.0 81.0 B-6 10.0 8.0 80.0 B-7 14.5 5.5 79.8 B-8 13.5 6.0 81.0 B-9 10.0 8.0 80.0 B-10 8.0 10.0 80.0 B-11 10.0 8.0 80.0 B-12 10.0 8.0 80.0 B-13 10.0 8.0 80.0 B-14 9.0 9.0 81.0 B-15 8.0 10.0 80.0 LOTS 1 A-8A SHALL HAVE RAIN GARDENS WITH A 66 SF FOOTPRINT. (REQUIRED MINIMUM AREA = 65.1 SF) LOTS 9A-17A SHALL HAVE RAIN T cip GARDENS WITH A 80 SF FOOTPRINT. REQUIRED MINIMUM AREA = 79.2 SF SEE SHEET C6 FOR REMAINING LOTS U JU IN M. SHI P DETAILS. ic. No. 45183 I.- V - w - w W w W ` ` cE _w _ W w \ o> d> . uce w \ �` cE W NA GRASS �� � � 4A ; � uG w UGE � AS FILT TRIP / ° ' `� UGE E w w _ BMP A: (23) 75 SF ` SA \ ` > -UGE- U -UGE W W LEVEL 1 RAIN GARDENS OPEN E o2 - - " A °� � `. � � AGE 42\ 16 ' / O ° ' `� UGE w W IN PERIMETER LOTS \ _ ; / `.` `.` .` uGE ucE uGE _ W W TREATED AREA: 0.84 AC • 1 , II I `\ `\ GE _ UGE GE w w � uGE � W \ E2. v < GE \ EW ROW s, 8A ,� AGE w �w s �� °� `�� cE \ u A K � BMP A -. � 1 -5 � � .� GE v BMP E: ADS BAYFILTER W. u�!' l ° w - - -i `� r� LICE w BIOFILTRAT 01� „ / \uGe W STORMTECH CHAMBERS �m', _ �`a�.�TRFATED AREA�'�. C A-6 A-7 �� o / Aice vW TOTAL AREA TREATED: fell I A7 - 1B ucE \ w A►I \ W NEW 10' P LIC ) /,, - \ \ 3.39 AC (INCLUDES 0.78 N'hl O Bl / - SPACE C\ i-w_ " �� -8 / / 26 3B / o�uG e W DRAINAGE E i \ \ AC DIRECT + 2.61 AC ,►r �Ir ` _ NEW PUBLIC SWM o� O O 4B W FROM BMPS A, B, & C)►i!' I FACILITY ESMT E\ E w i►'li _ i � w � W vl I g B2 15" PP STORM f E3 O� oa / ��\ ��\ �\ \UGE is w ` ► I NEW 20' PUBLIC H1 5B W O '♦' DROPINLET I l _ DRAINAGE ES 1 _ / o� 66 / BUG w TOP=398.3 �►,'�! I ; NEW 1a PUBLIC 76 ae ��. 1,' I W ` ` A-10 DRAINAGE ESMT e uGE INV=390. k1il I , / r I � ,y. w -�/ A-11 A-12 ��►!i , I i 12 NDP ���` i F'I' I B-1 j 9A ub B4 . .� A-1 > 1B I I rl / l SG I i1, I I I P �;p' I i I i w I T M - ` i . 15 as I 4�' I I i 1 l0A j j I 1 17A j � y '• �� •mow � 1 � ��� �`. / 20, PUBU i►�l i NEW PU IC SWM IINAGE ESMT E►Qi 1, 108 I ►�!i I I I FACILITY ESMT- �.p J i I a" vc i1 � f►!' I 11 A i LF f_I 18A P T� --- - - - - - - - 10 _ 1 �INM 7. FOREST/O!_N _ ��►g, I p - ��\ 10' NATIVE GRASS - i _ SPACE AREA 3. OWNS ►, I C1 - 12A I - _ FILTER STRIP - - - 0.3F�ACRES�fSG A- 2 5�5 9 iµ�- NEW J / // W PUBLIC 1SWM 1 21 13A i I i 19 < `. ; /' OPEN SPACE D 8 P �� FACILITY ESMT / - I I / / / As / 6 y / FACIUTU'BLIC SWM 34030 SF V A-20 12B 1 I � � %Ix l ✓ i / / . / / 48" CONC. RISER- EW a�-f - ° I _ BMP C: 750 SF LEVEL 2 rt , i r I 1 w / / / BIOFILTRATION BASIN. i \ / L ET // ` . ' . // TREATED AREA: 0.76 AC �� 444.77 14A i I - Il'21A - 1 1 j -13. 1 /w_w� 3 O / P / I , -23 i \ F ' 2A i 10' NATIVE GRASS t6 1 �ll •�i� , -14-- __� �I FILTER STRIP;. ! o�� _ . C7 \ d DRAINAGE ESMT W PUBLIC SWM FOREST10PEN \ V SPAEE AREAE-2. -15 1, - 1 C 0.46 ACMES HSG A EW PUBLIC SWM - a ' \ CIUTY ESMT = _ �_ = INV. 434.29 BEGIN ROW- - WIDENING X �� - OPEN SPACE- B 4271-6 _SF_ = BMP-a- (15)::::80 SF= _ _ _ _ = SWM FOREST/OPEN _ LEVEE 1 RAIN- GARDENS _ - - - - - SPACE AREA 2. - - - - - - - - - - - - - - E� SPACE -6- 147INTEROR LOTS-7 0.46�:ACRES­14SG A 42 = TREATED AREA: 0.7EAC PAVED DITCH D 1-420.37 30 0 30 60 90 / Scale: 1 "=30' 420 415 410 405 400 395 390 385 380 A6 CONSTRUCTION OF A SILT FENCE (WITH WIRE SUPPORT) 1. SET POSTS AND EXCAVATE A 4"X4" 2. STAPLE WIRE FENCING TO THE POSTS. TRENCH UPSLOPE ALONG THE LINE OF POSTS. -aim FLOW=III 3. ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. 4 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. G FLOW =1 � EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. FILTER FABRIC == P==111 WIRE SILT FENCE (SF) W. WIRE SUPPORT Not To Scale NOTE: STR. A7 MANHOLE IS PERMANENT. WHEN BASIN IS DEWATERED, USE PRECAST RISERS TO BRING STR. A7 INTO PERMANENT CONFIGURATION PER DETAIL 4 ON C14. V) A7 Q U Ef NOW IIIIIIIIIIIIIIII� ��' �_ WW 110301111111111 10+00 10+50 DESIGN HIGH WATER (25-YR. STORM ELEV.) TOP: 406.0 MIN. 0.5'� 11+00 11+50 TOP: 408.7 MIN. 2.0" t MIN. 3.0' MIN. 1.0' 67 C.Y./ AC. _ 48" RISER CREST= 405.0 "DRY" STORAGE C: WET TOP 67 C.Y./ AC. "WET" STORAGE 6" DEWATERING DEVICE. INV. 404.0 B: SEDIMENT CLEANOUT POINT A: BOTTOM CONC. BASE DESIGN ELEVATIONS WITHOUT EMERGENCY SPILLWAY (RISER PASSES 25-YR. EVENT) Riser DA Wet Wet Dry Dry Vol. 25 yr A B C Elev. (Acs.) Vol. Vol. Cy Vol. Cy WSE (Req.) (Prov.) (Req.) (Prov.) 400.0 402.0 404.0 404.00 4.00 268.0 645.0 268.0 274.0 424.00 SEDIMENT BASIN DESIGN TABLE NOT TO SCALE 420 415 410 405 400 395 390 385 12+0080 GRAVEL CURB INLET SEDIMENT FIL TER GRAVEL FILTER* RUNOFF WATER SEDIMENT J CONCRETE GUTTE 12" SPECIFIC APPLICATION 12" WIRE MESH FILTERED WATER o d a a - o o D d 0 0 _rF d d P4 CURB INLET THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. * GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE. 3 INLET PROCTION IP) C12 Not To Scale PERSPECTIVE VIEW W Azj W� .. - - • - - -....-.-.-.-.❖.•.I..•.-.-...•.-.-.-.•.-.. .••••••❖.••••❖.f l.•••••-•••••••••. .❖.❖.❖.❖.•.-.•�t❖.❖.❖.❖.�L❖.❖.,•.❖.! .❖.❖.❖.❖.❖.•f t �.❖.❖.❖.•.� t ••••••••� i.•.-.❖. �.•••••••. ••••� •I � PERSPECTIVE VIEW PERSPECTIVE VIEW PLASTIC FENCE METAL FENCE SOURCE: CONWED PLASTICS VDOT ROAD AND BRIDGE STANDARDS VA. DSWC 4 SAFTY FENCE SAF C12 Not To Scale PLATE. 3.1 -1 1992 3.35 Source: Va. DSWC TABLE 3.35-A ORGANIC MULCH MATERIALS AND APPLICATION RATES RATES: MULCHES: NOTES: per Acre Per 1000 sq. ft. Straw or Hay 1 � - 2 tons 70 - 901bs. Free from weeds and coarse (Minimum 2 matter. Must be anchored. tons for Spread with mulch blower winter cover} or by hand. Fiber Mulch Minimum 35 lbs. Do not use as mulch for 15001bs. winter cover or during hot, dry periods." Apply as slurry. Corn Stalks 4 - 6 tons 18S - 275 lbs. Cut or shredded in 4-6" lengths. Air-dried. Do not use in fine turf areas. Apply with mulch blower or by hand. Wood Chips 4 - 6 tons 185 - 275 lbs. Free of coarse matter. Air- dried. Treat with 12 lbs nitrogen per ton. Do not use in fine turf areas. Apply with mulch blower, chip handler, or by hand. Bark Chips 50 - 70 cu. 1-2. cu. yds. Free of coarse matter. Air - or yds. dried. Do not use in fine Shredded turf areas. Apply with Bark mulch blower, chip handler, or by hand. ' When fiber mulch is the only available mulch during periods when straw should be used, apply at a minimum rate of 2000 lbs./ac. or 45 lbs./1000 sq. ft. 5 MULCHING(MU) C12 Not To Scale TABLE 3.39-A ADHESIVES USED FOR DUST CONTROL Water Application Dilution Type of Rate Adhesive (Adhesive: Water) Nozzle Gallons/Acre Anionic Asphalt Emulsion 7:1 Coarse Spray 1,200 Latex Emulsion 12.5:1 Fine Spray 235 Resin in Water 4:1 Fine Spray 300 Acrylic Emulsion (Non -Traffic) 7:1 Coarse Spray 450 Acrylic Emulsion (Traffic) 3.5:1 Coarse Spray 350 6 DUST CONTROL(DC) C12 Not To Scale TABLE 3.31-C TEMPORARY SEEDING PLANT MATERIALS, SEEDING RATES, AND DATES w is SEEDING RATE )TEMPORARY SEEDING TS C12 Not To Scale TEMPORARY VE S DIKE Compacted Soil 18" min. 4.5' min. 8 DIVERSION DIKE DD C12 Not To Scale -Flow STONE CONSTRUCTION ACCESS -, STONE CONSTRUCTION ACCESS 7C VIN. 3" SM-2A ASPHALT TOP COURSE \_6" MN. 2'A AGGRL'GAI= BASE PROFILEPROFILE 70' MIN. ASPHALT PAVED WASHRACK EXISTING PAVEMENT EXISTING P 2% 2% PAVEMENT-J 12' MIN.* r POSITIVE DRAINAGE *MUST EXTEND FULL Vv'I= I (� I - TO SEDIMENT OF INGRESS AND EGRESS } TRAPPING DEVICE OPERATION PLAN 12 MIN. POSITIVE DRAINAGE 2% TO SEDIMENT - .... _ .� TRAPPING DEVICE FILTER CLOTH—` SECTION A -A A mininnun water tap of 1 inch must be installed -Aith a inlniiniunn 1 inch Wilcock shutoff valve suppl -iln, a wash hose -Mtln a diameter of 1.5 inches for adequate constant pressure. Wash water insist be carried assay from the entrance to an approved :settling area to remove sednilent. All sediinent shall be prevented froin entelili�, stonn drams, ditches or watercomses. PAVED WASH RACK No I PAVED CONSTRUCTION ENTRANCE (CE Not To Scale PERMANENT SEEDING SPECIFICATIONS reoruary Io tnrougn Hprii �u: Kentucky 31 Fescue - 128 Ibs/acre; Red Top Grass - 2 lbs/acre; Annual Rye - 20 lbs/acre. May 1 through August 15: Kentucky 31 Fescue - 128 lbs/acre; Red Top Grass - 2 lbs/acre; Foxtail Millet - 20 lbs/acre. August 16 through October 31: Kentucky 31 Fescue - 128 lbs/acre; Red Top Grass - 2 lbs/acre; Annual Rye - 20 lbs/acre. November 1 through February 15: Kentucky 31 Fescue - 128 lbs/acre; Red Top Grass - 2 lbs/acre; Winter Rye - 20 lbs/acre. MULCHING SPECIFICATIONS: Straw or hay at a rate of 2 tons/acre. Must be anchored. Spread with mulch blower or by hand. LIME AND FERTILIZER SPECIFICATIONS: Lime and fertilizer needs should be determined by soil tests. Soil tests may be preformed by the Cooperative Extension Service Soil Testing Laboratory at VPI&SU, or by a reputable commercial laboratory. Information concerning the State Soil Testing Laboratory is available from CITY Extension Agents. Under unusual conditions where it is not possible to obtain a soil test, the following soil amendments will be applied: For Permanent Seeding: Seeded areas shall be limed at a rate of 2 tons per acre, and fertilized at a rate of 1,000 lbs. per acre of 10-20-10 (10 lbs. per 1,000 square feet) or equivalent. For Temporary Seeding: Seeded areas shall be limed at a rate of 2 tons per acre, and fertilized at a rate of 600 lbs. per acre of 10-20-10 (10 lbs. per 1,000 square feet) or equivalent. LOW MAINTENANCE GROUND COVER: SOUTHEAST NATIVE GRASS SEED MIX (AMERICAN MEADOWS INC.) For slopes steeper than 3:1 grade, Mix the following seeds at 30 lbs/acre each: Virginia Wildrye (Elymus virginicus), Little Bluestem Grass (Schizachyrium scoparium), Purpletop (Tridens flavus), Broomsedge (Andropogon virginicus), and Indian Grass (Sorghastrum nutons). 10 PERMANENT SEEDING(PS) C12 Not To Scale 00 V 0 o w oU 10 IZ w oW W ,• Z_ � (7 1 Z �• W I Z d w oI z wZ w� N N C� N Q w� t I W J 0 J (� > w zW (n 0 w Of N Q w I � U T U JL1 IN M. SHTMP >- ic. No.. 45183 I ;Vito Al .C'�,41� IC AL •-- E E v U U 0 0 U U U W o� o 000 0 N cV CD CD > CV w Q w� O � w� Z 0 � U w 0 W LL J Z Q G � W TYPICAL VEE-S A E DIVERSIONo. m 2 0 Flow- Key In Filter Fabric 6" 0 V Stabilized Slope_ 10% SETTLEMENT \ Source: Va. DSWC Plate 3.12-1 ri1 CLEAN WATER DIVERSION CWD) C12 Not To Scale w Date Filter Fabric: Mirafi FW 402 or equivalent 0 9 2 3 2 019 Scale Sheet No. C12 OF19 File No. 16.009 END -SECTION 12" - 60" PIPE HUB END ON OUTLET END -SECTIONS SPK;OT END ON INLET END -SECTION X CONCRETE TO BE E LL — JJJ 4000 PSI MINWM PLAN DIAMETER C B OF PIPE aA3 DR sr FABbC I ) I� E I-.r PAYD LINE SF CTI(''SN Y-k Fl1Jf] UiFw END SECTION DIMENSIONS PIPE DIAMETER A B C D E 12" 4 15" 6" 2 3 1-4-, # 0 2 '6' is" 9' 2`1" 7 -5 4 O' 3 0" 21" 9 2 i1 2'-1 5 O' 3 6' 24 9 3'-7 2'-6. 6 -I' 4'-0" 27" 50 4'-0 2'-1 30, i O 4'-E 1' 7 6 t 5 0' 33" 1 / 4-10 2,_3. 11d 1.5'-6" 381, 1 I 3 5'-3' 2'-10 13'-1 ' G D42 54" 1 5: -5 2'-9 13 2 4' 7 6 NO" 1 5'-❑' 3' ALTERNATE END -SECTION 12" - 60" PIPE ES-1 HUB END ON OUTLET END -SECTIONS 8PK:04 END ON INLET ENO -SECTION ~` yx �JXyp HI CONCRETE TO BE 1 - E J- 4000. P5:1 MINNUM P LAN C B pIAM€TER ❑F PIPE �P�LOp� STEEL fAHRIC REINF DRCEh1ENT a 1 - + - "7 L`N END VIEW SECTION X-X ENO SECTION DIMENSIONS PIPE DLWETER A B C D E 15 ° 6' 2 -3' 2. 6 18,, 1.-Z -3" 3' 1D" 6`-1' 3 W' 21" 9' 2'-11' 24" 101, 3'-7 2'-8 F-3' 4` G" 27" 1O'z #'•D 2- 33" T'_I 4'-,W'. 3.3 4 i4, 5 fi" 36" 1'-3' 5'-3- 2-tb 4 3 ' a N3-❑" 42" t'•9' 5-3 2 1 1' 3 2•' 6 5" 21 777 54" 2'-3' 5'-5 1" P 4.' 7 fi" 60" 2'•6 5'-0 3'-3' Fs 3" B 0^ �r--.L ---}}}--- PAY LINE sHDln-nER B NOTES: PIPE LENGTHS SHOWN ON PLANS ARE RASED ON ENO -SECTION DESIGN SHOWN - ON THE LEFT, W THE CONTRACTOR ELECTS ' TO USE THE ALTERNATE DESIGN SHOWN ON THE RIGHT, LENGTHS WILL $E REPLCED BY CULVERT THE DIFFERENCE IN DIMENSION "D•'_ SLOPE DETAfL sPEGIrNCANON REFERENCE FLARED END -SECTION FOR 12"-60" CONCRETE PIPE CULVERTS 302 VIRGINIA DEPARTMENT OF TRANSPORTATION REV. 7/01 102.01 SHAPE TO ELEVATION OF MID -POINT OF LARGEST PIPE. .� SHAPE TO CONTOUR I OF PIPE I •� I %;� • •• SLOPE TO DRAIN TO INVERT OF OUTLET PIPE �9 SECTION A -A TRANSITION BETWEEN PIPE DIAMETERS WFEN METHOD OF TREATMENT IN DROP INLETS DIFFERENT SIZES OF PIPES ARE ENCOUNTERED. e SHAPING OF MANHOLE AND INLET INVERTS IN ACCORDANCE WITH \� THIS DRAWING 15 TO APPLY TO THOSE STRUCTURES SPECIFIED PLANS OR WHERE INVERT OF PIPE IS ABOVE INVERT OF 1 SLOPE TO DRAINON TO INVERT OF STRUCTURE. TOPIPE MANHOLE OR DROP INLET IS TO BE FORMED AND CONSTRUCTED IN ACCORDANCE WITH APPLICABLE STANDARD OR SPECIAL DRAWING. THE INVERT SHAPING AS DETAILED HEREON IS TO CONSIST OF A / A v PORTLAND CEMENT CONCRETE MIK CONFORMING TO CLASS A3 OR CLASS C1, EXCEPT THAT 25X OF COARSE AGGREGATE MAY BE '• UP TO 4" IN DIAMETER AND CONSIST OF STONE, BROKEN BRICK, BROKEN CONCRETE OR BROKEN CONCRETE BLOCK. THE SURFACE SHALL BE LEFT SMOOTH BY MEANS OF HAND TROWELLING. NONE OF THE COARSE AGGREGATE SHALL REMAIN EXPOSED. ,•�, DETAILS OF INVERT SHAPING AS SHOWN HEREON ARE FOR EXAMPLE A PURPOSES ONLY. EACH MANHOLE OR DROP INLET IS TO BE SHAPED — INDIVIDUALLY TO BEST FIT THE PARTICULAR INLET AND OUTLET CONFIGURATION AND FLOW LINES. SECTION B-B PLAN METHOD OF TREATMENT IN MANHOLES �VpQ'r STANDARD METHOD OF SHAPING SPECIFICATION REFERENCE ROAD AND BRIDGE STANDARDS MANHOLE & INLET INVERTS SHEET 1 OF 1 REVISION DATE 302 106.06 VIRGINIA DEPARTMENT OF TRANSPORTATION 18" MIN. RUNOFF WATER WITH SEDIMENT GRAVEL *(12"MIN. DEPTH) Li d v Q SEDIMENT WIRE MESH FILTERED WATER * GRAVEL SHALL BE VDOT #3, #357 OR #5 COARSE AGGREGATE. �DROP NLET PROCTION (DIP) C1 3 % Not To Scale CORRUGATED METAL EXTENSION COLLAR WATERPROOF SEAL PROVIDE OUTLET PROTECTION EARTHEN DIKE PROVIDE INLET (COMPACTED) PROTECTION 7 A 24:1 D STANDARD FLARED END SECTION SECTION VIEW NOTE: SEDIMENT MAY BE CONTROLLED AT OUTLET IF UPLAND PONDING WILL CREATE PROBLEMS EARTHEN DI"c- (COMPACTE[ SECTIONA — A TEMPORARY SLOPE DRAIN AS NEEDED SL-1 05 BARS 0 8" C-C TYP. as BARS a allc-c TYP. IIIIIILII I � . A I I I I I I A e =.• T T � e 30" DIAMETER y• 1 •• 7 ( I I I I I _T I I I I I T T_r TT. PLAN WALLCTHCKNESS VARIES PLAN v, CLASS A3 CONCRETE CLASS A3 CONCRETE •• SECTION A -A SECTION B-B NOTES 1. THE STANDARD SAFETY SLAB (SL-1) IS TO BE USED ONLY WHEN SPECIFIED IN THE PLANS ON THE DRAINAGE SUMMARY SHEET AND/DR THE DRAINAGE DESCRIPTION.FOR MANHOLES JUNCTION BOXES AND DROP INLETS WITH HEIGHTS GREATER THAN 12 FEET THE SPADING OF ADJACENT SAFETY SLABS SHALL BE W TO 12'WITH NO SAFETY SLAB LOCATED WITHIN 6 FEET OF THE TOP OR BOTTOM OF THE STRUCTURE. SAFETY SLABS SHALL NOT BE LOCATED BELOW ANY INLET PIPE OF 30" DIAMETER OR GREATER. 2. THE COST OF THE SL-1 IS INCLUDED IN THE COST OF THE STRUCTURE. SEE CAST N PLACE DRAWINGS FOR FURTHER DETAILS 3. ACCESS OPENINGS ARE TO BE STAGGERED FROM ONE SIDE OF STRUCTURE TO THE OTHER WHERE APPLICABLE. STEPS ARE TO BE STAGGERED ACCORDINGLY. e A 5 BARS 0 8" C-C TYP. 4. SAFETY SLAB MAY BE CAST -IN -PLACE OR PRECAST. CAST -IN -PLACE CONCRETE TO BE CLASS A3 (3000 PSI). PRECAST CONCRETE IS TO BE A4 (4000 PSI). REINFORCING STEEL TO BE IN ACCORDANCE WITH AASHTO M31. ;;. ,• !•.,•R+1,�.��. 5. ACCESS OPENINGS MAY BE 30" DIAMETER OR 30" SOUARE. WHEN STRUCTURE WIDTH IS1. LESS THAN 30" THE ACCESS OPENING SHALL BE RECTANGULAR (STRUCTURE WIDTH BY 30" LONG). TYPICAL PRECAST UNIT BRI�S TYPICAL CONCRETE SAFETY SLAB FOR DROP INLETS,REFERENCE SPECIFICATION ROAD AD STANDARDS MANHOLES AND JUNCTION BOXES SHEET 1 OF 1 REVISION DATE VIRGINIA DEPARTMENT OF TRANSPORTATION 302 106.14 SHALLOW ON SHALLOW SLOPES, STRIPS OF NETTING PROTECTIVE COVERINGS MAY BE APPLIED ACROSS THE SLOPE. WHERE THERE IS A BERM AT THE TOP OF THE SLOPE, BRING THE MATERIAL OVER THE BERM AND ANCHOR IT BEHIND THE BERM. ON STEEP SLOPES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. 4 BRING MATERIAL DOWN TO A LEVEL AREA BEFORE TERMINATING THE INSTALLATION. TURN THE END UNDER 4" AND STAPLE AT 12" INTERVALS. 12" IN DITCHES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AVOID JOINING MATERIAL IN THE CENTER OF THE DITCH IF AT ALL POSSIBLE. SOIL STABILIZATION BLANKET DETAIL (SS13 Not To Scale ATYPICAL DITCH SECTION DETAIL VDOT ll1 Cc Not To Scale TYPICAL GRAVEL STRUCTURE RIGHT OF WAY DIVERSION ^trench tting 6" :h An ANLA WIIH NU ULrINLU CHANNEL P 38/7.�8 I 3 8 5)219 I I 1 IIII � I III 1` / I I / � I PIPE OUTLET CONDITIONS A L a o% II-11�1 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 3.18-3 AND 3.18-4. 3. d = 1.5 TIMES THE MAXIMUM STONE DIAMETER, BUT NOT LESS THAN 6 INCHES. Q10 (cfs) La (ft) Do (ft) 3Do (ft) d50 (in) depth (in) Outlet Condition Al 20.80 13.0 2.00 6.00 9.0 12.0 Channel OUTLET PROTECTION TABLE (OP L� / O / I I I I I O I(-n / O 3 SEDIMENT BASIN PLAN VIEW C 13 SCALE: 1 "=20' 3d o (MIN.) 'IPE OUTLET TO WELL )EFINED CHANNEL DRIP LINE SNOW FENCE BOARD FENCE CORD FENCE CORRECT METHODS OF TREE FENCING I pow 00 CORRECT TRUNK ARMORING 00 TRDANGULAR BOARD FENCE ('_8�TREE PROTECTION FENCING U JU IN M. SHTMP > ic.'jNO.J. �45183 Not To Scale Not To Scale Not To Scale Not To Scale A6C \ 0 0 v 'w, 1 0 405 - - - 405 415 !� n n M J a''� 415 A6 A � AS � � � � Z MIN z w oW 400 1111 r- 00 410 410 MIN 6' 415 r 415 1 Z MIN mrd 00 HEMMER A 405 405 v wIMMENSE 11110- 395 395 405 405 w d 111101 410IIIIII 410 W p MIN INNIM400MOM- IIMI OEM MIN IIIIIIIIIMKIA 400 O I I SEEM �j 390 390 400 400 q�C, Z MIN 395 395 405MINMIN 405 , MIN 385 385 395 395 400 400 1111117 MIN 390 1111111 390 MIN MEMO N 380MINIIIIIIII1WIN WMEMWE 380 390 390 IIIIIIII MEMO MEW-rmi 385oniu- 385 395 395 w/ N 375 111 375 385 385 Q 3g 390 390 I- 380 10+00 - 10+5D 0 370 370 380 3380 I J 10+00 z 10+50 11+00 11+50 385 385 0 > 3 STORM PROFILE A6A—A6Z I w 365 365 2 STORM PROFILE A6—A6C c14 1" — 30' �+ w 1 = 30' 33 w C 14 380 10+00 10+50 11+00 11+5D80 ~ w N Q MMENI oB1 D2 W -U 360 360 4 STORM PROFILE A6—A8 Zo 355 111 355 C1 C2 420 z � � 420 Z O M c�D O O cV 425 - ~ �^^ m 425 IRS NOW 41 415 350 350,T, ME 0 111111 420 420 410 410 ININ 345 345 415 415 405 405 • SHIMP 340 340log ic. No.. 45183 410 410 400 400 NOTE: CONCRETE INLET SHAPING 335 335 - (IS-1) REQUIRED ON ALL STRUCTURES'i 405`_ 4405 ' ins 10+00 10+50 395 , + , + 395 WITH A 4 OR GREATER DROP A N D 330 330 rN 0 00 0 50 MIN IIIIII 5 STORM PROFILE C1—C2 SAFETY SLABS (SL-1) ON ALL 6 STORM PROFILE B 1—D2 STRUCTURES TALLER THAN 12'. 325 10+00 10+50 11+00 11+50 12+00 12+50 13+00 13+5F5 C1 4 1 = 30 C 1 4 1" = 30' 1 STORM PROFILE Al —A6 C14 1" = 30' 455 IRF� lRa� 455 435 435 445 445 w w cn cn 450MOM III KE 111111 1111111 MI MINE III IM111111111111 450 430MIN 430 440ENNIN IN 440 E E 11111111 o III MINE v U U 445MINIIIIIIIII MI IN 445 425 425 435 435 O o IMA U U 440 MINE III IN 1 440 420 420 430 430 SEEM INNIMMIM is 1ME1 w—m On— . �.w 435MINE! III dIIIIIIII11111 I� 435 415 415 425 425 MIN III OMENS ME 1111111 IIIIIIES IIIIIIIIEP O o 1111 00 430 430 410 IIIIIIIMIIIIII410 420 420 "' 1 a� N N 0 N I(C:lj 425IIIIIIIIM 425 44 44 405 10+00 10+50 11 +00 11 +50 12+0005 415 10+00 10+50 11 +00 11 +50 12+0015 420 420 8 STORM PROFILE B2—F1 9 STORM PROFILE G1—G2 if C14 1"=30' C14 1"=30' � 415 415 w 440 n 440 410 410 Effi435IIIIIIR� 435 430 430 405 405 430111 111111 MINE! 430 425 ININEW 425 44 400 0+00 10+50 11+00 11+50 12+00 12+50 13+00 13+ 400 425 425 420 420 w STORM PROFILE B1—B6 PVC C 14 1" = 30' 420 420 415 415 415 IIIIIIIIWINE!415 410 410 O H2 470 470MIN410 410 405 405 Z 4651111111110� MIN 465 405 _MIN 11111111 4405 4001111111 4400 10+00 z — 11+00 11+50 12+00 12+50 10+00 10+50 11+00 MIN SIMMS- —10+50 460 illMIN 460 0 MIN il MEMO IIIIIIIIIER10 STORM PROFILE B2—E3 11 STORM PROFILE J 1—J2 C 14 1 " = 30' C 14 1 ° = 30' v 455 I 455 w ME 0 W ;wMm 450 INNER11111111!450 470 470 470� 470 LL SEEM ME Z MIN IIIIIII! IN �21IIIIIIIIIIIIIIIIIIII 445 illl 11111111111101 445 465 1111111!465 465 465 q Q MIN li�� MIN MIN IIIIIIIF� milim 440 440 460 460 460 460 MIN IIIIIIII1 MIN SEEM IIIIIIII1 MIN 05. m 435PRIMEIIIIIIIMMIN 435 455 SEEM455 455 455 G O SEEM m J NIEMEN! MIN IN I m > 430 430 450 450 450 450 w Date 425 5 445 q45 445 IIN II 445 1�+00 10+50 11+00 11+50 12+00 12+50 13+00 13+5 M+00 10+50 11+00 11+50 16+00 10+50 11+00 0 g 2 3 2 0 1 9 12 STORM PROFILE B5—H2 13 STORM PROFILE 1— 3 14 STORM PROF LE 2— A2 Scale 1 m6mA NO C14 1"=30' C14 1"=30' C14 1"=30' Sheet No. C14 OF19 File No. 16.009 _ IIIIIIIIII� �' IIIIII■ „ IIIIIIIIIIIII■ -_ IIIIII■ ■ C • ' _ /III. _' ���� • c - _ �� � �1I1� err rr �r _ ` - III ■�-� � � _ •s -��1�l.C�r17�u��M� • I� tR� ItTi� mar . � _ i�LJ � � 13►1 �I3r� =' III -_- _ II II II.II � _ I—_ a .ctS� — �Y Cam II � E �vs i� ■ 1� ■ SEQUENCE OF CONSTRUCTION - OFFSITE STORM 1. INSTALL CONSTRUCTION ENTRANCES OFF RIO ROAD AS SHOWN. 2. BEGIN SEWER INSTALLATION FROM MEADOW CREEK AND WORK UPHILL. USE CWD TO ROUTE CLEAN WATER AROUND TRENCH AREA. 3. DISTURB NO MORE THAN 100' LENGTH OF TRENCH AT A TIME. 3. IMMEDIATELY COVER AND STABILIZE TRENCH AT THE END OF EACH DAY. USE SILT FENCE AS SHOWN TO PREVENT EROSION OF DISTURBED TRENCH AREAS. POI I Or FSI I E SAN. SEWER BY OTHERS — — 5 1g" PP STORM — NEW 20' PUBLIC DRAINAGE ESMT g / ICD I 0% qyA3 / I / / I STUB OUT INV=341.3' � I A2 % NEW 20' P LIC O �' 1 r DRAINAGE SMT n / I / APPROXIMATE LOCATION L, / I OF FLOOD ZONE AE PER / FEMA MAP SEWER CONNECTION THROUGH TMP 61-210B 1"=30 { +j (.OIIINI'V OF ALBEMARLE Department of Community Devel apmenit Construction Record Drawings (As -built) for VSMP The following is a list of information required can construction record drawings for stormwater facilities (reference Water Protection Ordinance 17-422). It is preferable that tote c,on truc it.on record orcl drawing be IpTepared ky someone oiher Man the designer. er. Please (k) not provide ' vign drawings as comst action record drawings. A. A signedand datcxl prraf+ fonail so] of the pruparing engineer or surveyor. B. The name and address of the firm and individual preparing the drawings on the title sheet. '_ The c onaructed location of all ilettlls mmc:iat d withi each facility, and the inspeeti€ n words- to verify proper dimensions, materials and installation. 1-be items include, but are nut lirniied to 1110 following: 1,- Inspection Records and photographs for pipe trenches and heddin,g, including underdrains- 1 Videu Pipe htspection for any pipes which arc not accessible or viewable. 3. Updated Location with geo-coordinates of all laciliLies. . Verlfled flralnage .Area maps for tbe: drainage area treated, and for drainage; to the facilities. 5. Current physical and to ograkphic survey for gall earthen structures. 12onds should: include a survey of lte pond bottom. Surveys should verify pond volumes are per design. Corrections may [v required for alterations frnm the. design. 6. Plants, location and type. 7, flans and profiles for all culverts, Ulpes, Byers, Weirs and Dratnage Structures - (display they installed type of drainage s"cturesp c:ulverYpipe size, weirs, mate ial,s. intels or end treatment(s), inlet and outlet protection., alignment and invert elevations compared to design. . Computations. lf()r si niftcanl deviations Imm design, provide sealed cxarnputations verifying that the as -built condition is equivalent or letter than de -sign. . Dlteh mines - Display the enwarueted location of all ditch lineq and channels, including, typical sections and linings. TO- Easements - Show all platted easemenu; with dead book references labeled. Facilities and drainage roast he within plait d calseme-nls. i'ro vid+: € upies of rLx.:orc14.cl do c timeDis. 11. Guardrail. fence or other safety, provisions - Display the constructed location of all safety provisions: fence--, guardrail, including the type, length and applied end treatments, compared to design. 12.. Material lavers — hiofilter media, stone layers, sand layers, keyways and cores must be verified as to material types and depths-- Include inslx�ction reports, lxwing or tail fait relx)rts and materials c:erlifications. 13iorilte€ media must be an approved state mix. 11_ Access roads —show location of access roads, surface treatment drainage, etc, as applicable, t4. Compaction repurts arc: required to verify fill compaction in darns. 15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning. 1 t Il I i I I I I II !� I I ,*' I !ll I �i I 6l Ilk OFFSITE OFFSITE SANITARY SEWER BY OTHERS. 30 0 30 60 90 Scale: 1 "=30' 4) 455 445 440 �)' , (Ac- W I w 1 /' � _� POLE^ ICV A, g \ t o �w�w � I � \ ��\ `\ (A4 S C O II I I I °� / e I /_ I c,CP 00 T � C E I 5 �I M,I J `P' U C1 II o �T� c/ / OFFSITE SAN. WW�c 36,E SEWER BY OTHERS � c -Z 33g � (/ � \ 36�I I ��ti _��� V A\VA�IIIIIII o , / <:�r 1 / 1 V 1 7 I A m 1 C13 ' � � � �I � I ► � �I l i / i///�/ �/// � / / i � GI S C1 4 I I o °' 0)� I $ I 41 / I 1 � / 11 / / // // // �/ / / I I 'i OFFSITE SANITARY SEWER BY OTHERS. 2 SEWER CONNECTION EROSION CONTROL PLAN 30 0 30 60 90 C15 1" = 30' Scale: 1 "=30' 3 B OF LTER C PLAN C15 1"=20' PRECAST--IifILTER MED* 750 S . CONC. RISER W. PEA GRAVELJ50_S=25 DEPTH_p TRAS #57 STONE. 75e X 2.25' DEPT1111, inns—nzn nn 445.5 BED SURFACE 447.10 `^' 442.5 TOP GRAVEL 43% 1 0 —KHEDA-E- ERFORATED JV =441 on 10+50 5 BOFLTER C PROFILE C15 1 " = 20' ON SIDES Off BIOFILTER 0 3" WASHED PEII 455 450 1-YR WSE=441.42 10-YR WSE=445.59 25-YR WSE=446.10 445 440 /W E44DIA 5 11+003 U s e < y ;U M 0 \ S\� rTt o s I z� 'AkS M M �cc) �� / 0 s 1.5 �F — 5— — FEl { I W I I - �_ 17.5 J —,6.5 �0 6� �o cocn v W /' �J 0) —1 (1r) C 000 O D Sao D M `S� pJ- 4 B OF LTER D PLAN C15 1"=20' FILTER MEDIA: 175 SF X 3.0' DEPTH. PEA GRAVEL: 175 SF X 0.25' DEPTH. #57 STONE: 175 SF X 1.75' DEPTH. El. 24 HDPE RISER 426, TRASH RACK BERM LD BY 6"X6" OBSERVArioii RIM=418.00 TIMBER . SEAL WITH WELL & IN = 1:30 IMPERM ABLE LINER. 420 420 —5 BED 3" WAS ED PEA 1-YR WSE=413.51 IBERM @ SURFACE _ GRAVELI FILTER B/W 10-YR WSE=413.91 418.60 414.5 TOP STONE SOIL MEDIA 25-YR WSE=414.17 415 GRAVEL -- 415 _FILTER RIC 412.5 OTTOM �N OF 4100 GRAVEL 15" HDPE OUT BIOFILTER ONLY 10+00 L@ 411.30 10+A 6" SCHEDULE 40 PERFORATED PVC INV.=413.50 C�--' U JU IN M. SHTMP ,ic. No. 45183 6 B OF LTER D PROFILE C15 1"=20' Project: Ecovillage, VA (S150496) 09 Chamber Model- MC-4500 StormTech" PROJECT INFORMATIONC���yypp_�d CC/``/ff CT Units- Imperial Click Here fw Metrics"' SIeVaW/srry aTQ P - ENGINEERED JIM CLARK Number of Chambers- 32 - � ,,,,,,, yr►,7. PRODUCT 240-463-0124 aSeprniiOch• x Number of End Caps - 4 MANAGER: JAMES.CLARK@ADS-PIPE.COM _ _ MS FOR STORMTECH -r Voids in the stone (porosity) - 40 % MIKE GREEN - INSTRUCTIONS, Base of STONE Elevation - 404.50 ft ADS SALES REP: 304-240-0082 DOWNLOAD THE ❑� Indude Perimeter Stone in Calcula0ons MIKE.GREEN ADS-PIPE.COM `�- -_ ILa INSTALLATION APP a Amount of Stone Above Chambers - 12 in @ r.;� Amount of Stone Below Chambers - 30 in PROJECT NO: S150496 Area of system- 1632 sf Min. Area- 1299sf min. area ADVANCED DRAINAGE SYSTEMS, INC. Height of System inches Incremental Single Chamber Cubic feet Incremental Single End Cap (cubic feet) Incremental Chambers (cubic feet Incremental End Cap cubic feet Incremental Stone cubic feet Incremental Ch, EC and Stone cubic feet Cumulative System cubic feet Elevation feet 102 0.00 0.00 0.00 0.00 54.40 54.40 7679.43 413.00 WQ Volume: 1 6924 101 0.00 0.00 0.00 0.00 54.40 54.40 7625.03 412.92 System Outlet: 1 405.5 100 0.00 0.00 0.00 0.00 54.40 54.40 7570.63 412.83 Volume Below Outlet: 1 652.90 99 0.00 0.00 0.00 0.00 54.40 54.40 7516.23 412.75 Volume Subtotal: 7576.80 98 0.00 0.00 0.00 0.00 54.40 54.40 7461.83 412.67 WQ Elevation: 412.85 97 0.00 0.00 0.00 0.00 54.40 54.40 7407.43 412.58 96 0.00 0.00 0.00 0.00 54.40 54.40 7353.03 412.50 BayFifter model 530 95 0.00 0.00 0.00 0.00 54.40 54.40 7298.63 412.42 Volume per finer 2500 94 0.00 0.00 0.00 0.00 54.40 54.40 7244.23 412.33 Required Head 32 93 0.00 0.00 0.00 0.00 54.40 54.40 7189.83 412.25 Minimum Outlet 402.83 92 0.00 0.00 0.00 0.00 54.40 54A0 7135.43 412.17 Filler outlet invert 402.83 91 0.00 0.00 0.00 0.00 54.40 54.40 7081.03 412.08 90 0.04 0.00 1.31 0.00 53.88 55.19 7026.63 412.00 Number of filters 3 89 0.12 0.01 3.72 0.04 52.90 56.66 6971.44 411.92 88 0.16 0.03 5.27 0.11 52.25 57.63 6914.79 411.83 87 0.21 0.05 6.68 0.19 51.65 58.52 6857.16 411.75 86 0.27 0.07 8.59 0.27 50.86 59.71 6798.64 411.67 85 0.45 0.09 14.49 0.35 48.46 63.30 6738.93 411.58 84 0.67 0.11 21.29 0.45 45.70 67.44 6675.62 411.50 83 0.80 0.14 25.57 0.57 43.95 70.08 6608.18 411.42 82 0.91 0.17 29.06 0.67 42.51 72.24 6538.10 411.33 81 1.00 0.19 32.09 0.77 41.26 74.12 6465.86 411.25 80 1.09 0.22 34.79 0.86 40.14 75.79 6391.74 411.17 79 1.16 0.24 37.23 0.97 39.12 77.32 6315.95 411.08 78 1.23 0.27 39.49 1.08 38.17 78.74 6238.63 411.00 77 1.30 0.30 41.59 1.19 37.29 80.07 6159.89 410.92 76 1.36 0.32 43.55 1.29 36.46 81.31 6079.82 410.83 75 1.42 0.35 45.40 1.39 35.68 82.47 5998.51 410.75 74 1.47 0.37 47.15 1.48 34.95 83.58 5916.04 410.67 73 1.53 0.39 48.80 1.58 34.25 84.63 5832.46 410.58 72 1.57 0.42 50.38 1.67 33.58 85.63 5747.83 410.50 71 1.62 0.44 51.88 1.76 32.94 86.59 5662.20 410.42 70 1.67 0.46 53.32 1.85 32.33 87.50 5575.61 410.33 69 1.71 0.48 54.69 1.94 31.75 88.38 5488.11 410.25 68 1.75 0.50 56.00 2.02 31.19 89.21 5399.73 410.17 67 1.79 0.53 57.26 2.10 30.66 90.02 5310.52 410.08 BMP E REQUIRED WATER 66 1.83 0.55 58.47 2.18 30.14 90.79 5220.51 410.00 QUALITY VOLUME 65 1.86 0.56 59.63 2.26 29.64 91.53 5129.72 409.92 = TV FROM VRRM 64 1.90 0.58 60.75 2.33 29.17 92.25 5038.18 409.83 63 1.93 0.60 61.82 2.41 28.71 92.94 4945.94 409.75 = 4595 CF RE . Q 62 1.96 0.62 62.85 2.48 28.27 93.60 4853.00 409.67 4657.72 CF PROVIDED. 61 2.00 0.64 63.84 2.55 27.84 94.24 4759.40 409.58 5310,52-652.80=4657.72 60 2.03 0.66 64.80 2.62 27.43 94.85 4665.16 409.50 59 2.05 0.67 65.72 2.69 27.03 95.45 4570.31 409.42 58 2.08 0.69 66.61 2.76 26.65 96.02 4474.86 409.33 57 2.11 0.71 67.46 2.83 26.29 96.57 4378.84 409.25 56 2.13 0.72 68.28 2.90 25.93 97.11 4282.27 409.17 55 2.16 0.74 69.08 2.96 25.58 97.62 4185.16 409.08 54 2.18 0.76 69.84 3.02 25.25 98.12 4087.54 409.00 53 2.21 0.77 70.58 3.09 24.93 98.60 3989.42 408.92 52 2.23 0.79 71.28 3.15 24.63 99.06 3890.82 408.83 51 2.25 0.80 71.96 3.21 24.33 99.50 3791.76 408.75 50 2.27 0.82 72.62 3.28 24.04 99.94 3692.26 408.67 49 2.29 0.84 73.25 3.36 23.76 100.37 3592.32 408.58 48 2.31 0.85 73.85 3.38 23.51 100.74 3491.95 408.50 47 2.33 0.86 74.43 3.43 23.25 101.12 3391.21 408.42 46 2.34 0.87 74.99 3.49 23.01 101.48 3290.09 408.33 45 2.36 0.89 75.52 3.54 22.78 101.83 3188.61 408.25 44 2.38 0.90 76.03 3.59 22.55 102.17 3086.77 408.17 43 2.39 0.91 76.51 3.64 22.34 102.49 2984.60 408.08 42 2.41 0.92 76.97 3.69 22.13 102.80 2882.11 408.00 41 2.42 0.93 77.42 3.74 21.94 103.09 2779.31 407.92 40 2.43 0.95 77.84 3.78 21.75 103.37 2676.22 407.83 39 2.44 0.96 78.23 3.83 21.58 103.64 2572.85 407.75 38 2.46 0.97 78.61 3.87 21.41 103.89 2469.21 407.67 37 2.47 0.98 78.97 3.91 21.25 104.13 2365.32 407.58 36 2.48 0.99 79.31 3.95 21.10 104.35 2261.19 407.50 35 2.49 1.00 79.62 3.99 20.95 104.57 2156.84 407.42 34 2.50 1.01 79.93 4.03 20.82 104.77 2052.27 407.33 33 2.51 1.02 80.21 4.06 20.69 104.96 1947.50 407.25 32 2.51 1.02 80.47 4.10 20.57 105.14 1842.54 407.17 31 2.53 1.03 80.86 4.13 20.40 105.40 1737.40 407.08 30 0.00 0.00 0.00 0.00 54.40 54.40 1632.00 407.00 29 0.00 0.00 0.00 0.00 54.40 54.40 1577.60 406.92 28 0.00 0.00 0.00 0.00 54.40 54.40 1523.20 406.83 27 0.00 0.00 0.00 0.00 54.40 54.40 1468.80 406.75 26 0.00 0.00 0.00 0.00 54.40 54.40 1414,40 406.67 25 0.00 0.00 0.00 0.00 54.40 54.40 1360.00 406.58 24 0.00 0.00 0.00 0.00 54.40 54.40 1305.60 406.50 23 0.00 0.00 0.00 0.00 54.40 54.40 1251.20 406.42 22 0.00 0.00 0.00 0.00 54.40 54.40 1196.80 406.33 21 0.00 0.00 0.00 0.00 54.40 54.40 1142.40 406.25 20 0.00 0.00 0.00 0.00 54.40 54.40 1088.00 406.17 19 0.00 0.00 0.00 0.00 54.40 54.40 1033.60 406.08 18 0.00 0.00 0.00 0.00 54.40 54.40 979.20 406.00 17 0.00 0.00 0.00 0.00 54.40 54.40 924.80 405.92 16 0.00 0.00 0.00 0.00 54.40 54.40 870.40 405.83 15 0.00 0.00 0.00 0.00 54.40 54.40 816.00 405.75 14 0.00 0.00 0.00 0.00 54.40 54.40 761.60 405.67 13 0.00 0.00 0.00 0.00 54.40 54.40 707.20 405.58 12 0.00 0.00 0.00 0.00 54.40 54.40 652.80 405.50 BOTTOM 1.0' OF STONE IS 11 0.00 0.00 0.00 0.00 54.40 54.40 598.40 405.42 CONSIDERED "DEAD SPACE. 10 0.00 0.00 0.00 0.00 54.40 54.40 544.00 405.33 9 0.00 0.00 0.00 0.00 4 54.40 4.4 5 0 489.60 405.25 THIS 652.80 CF VOLUME 8 0.00 0.00 0.00 0.00 54.40 54.40 435.20 405.17 BELOW 405.50 IS NOT 7 0.00 0.00 0.00 0.00 54.40 54.40 380.80 405.08 COUNTED TOWARDS TV. 6 0.00 0.00 0.00 0.00 54.40 54.40 326.40 405.00 5 0.00 0.00 0.00 0.00 54.40 54.40 272.00 404.92 4 0.00 0.00 0.00 0.00 54.40 54.40 217.60 404.83 3 0.00 0.00 0.00 0.00 54.40 54.40 163.20 404.75 2 0.00 0.00 0.00 0.00 54.40 54.40 108.80 404.67 1 0.00 0.00 0.00 0.00 54.40 54.40 54.40 404.58 Q'. \ n P � \ - , NEW ROW 18" H E s STOR 0 (\\ n I� 0) K ADS BAYFILTER W. /I I' ;i" ,A - Ur STORMTECH CHAMBER S 1�. ln, I TOTAL AREA TREATED: lit, / A� } _ - 3.39 AC (INCLUDES 0.78Al" / l WEIR A INV. __ AC DIRECT + 2.61 AC ! TQP=409. WEIR FROM BMPS A, B, & C) kff/ 1. TOP=410.0 �_ ��,/I � 1,,1 / A8 1B1 1 " PP S ORM V. 8'x6' PRECAST ll / I 407.16 CONC. VAULT �j�,) / / 4'x5' REC ST CON - W. BAYFILTERS F I !/ � / I JUNC ION OX INV. 402.83 I/!�l I STORAGE R W � 1 j 1 INV=407.0 I I 11110 " IJ/', � Ij,�( / / / / 0,#j I 11 Afp`H ( ) ISO ATO ROW , I1 / IN =40 00 �j" / //� / J lk" / 0 LF 6" j j , / ,#/ P RF. PVC 1 hf�/ �UNDERDRAIN �,f�f � . 405.50 1 / NEW PU IC SW FACILITY ESMT I i l,) I I /r #p7 S NE BE DING II, /l��l I 81. X 20. ijt� I INV. / OTT OP= =404. 0 13.00 I)k , I / 409.73 /���/ -- INV. j� /1 INV. � 407.19 jj!I1i � 409.73 C1 INV. / �jl�) 11 �l I ' `�- 408.00 48" H-1 � / D. ---_ `_ __ Q P I C2 / / V n I n I ., I!7,IMMBIE/illlsillsttalitTAJINIJPM11TLOlralLo]ill!lrmml SCALE: 1 "=20' ECOVILLAGE CHARLOTTESVILLE, VA MC-4500 STORMTECH CHAMBER SPECIFICATIONS IMPORTANT - NOTES FOR THE BIDDING AND INSTALLATION OF MC-4500 CHAMBER SYSTEM 1. CHAMBERS SHALL BE STORMTECH MC4500. 1. STORMTECH MC-4500 CHAMBERS SHALL NOT BE INSTALLED UNTIL THE MANUFACTURER'S REPRESENTATIVE HAS COMPLETED A PRE -CONSTRUCTION MEETING WITH THE INSTALLERS. 2. CHAMBERS SHALL BE ARCH -SHAPED AND SHALL BE MANUFACTURED FROM VIRGIN IMPACT -MODIFIED POLYPROPYLENE 2. STORMTECH MC4500 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH MC-3500/MC4500 CONSTRUCTION GUIDE". COPOLYMERS. 3. CHAMBERS ARE NOT TO BE BACKFILLED WITH A DOZER OR EXCAVATOR SITUATED OVER THE CHAMBERS. 3. CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418.16a, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) STORMTECH RECOMMENDS 3 BACKFILL METHODS: CORRUGATED WALL STORMWATER COLLECTION CHAMBERS" CHAMBER CLASSIFICATION 60xl01. STONESHOOTER LOCATED OFF THE CHAMBER BED. . BACKFILL AS ROWS ARE BUILT USING AN EXCAVATOR ON THE FOUNDATION STONE OR SUBGRADE. 4. CHAMBER ROWS SHALL PROVIDE CONTINUOUS UNOBSTRUCTED INTERNAL SPACE WITH NO INTERNAL SUPPORTS THAT WOULD BA FILL FROM TIDE THEEXCAVATION IN A L N B E R EXCAVATOR. CK O OU SUSING LONG BOOM HOE O IMPEDE FLOW OR LIMIT ACCESS FOR INSPECTION. 4. THE FOUNDATION STONE SHALL BE LEVELED AND COMPACTED PRIOR TO PLACING CHAMBERS. 5. THE STRUCTURAL DESIGN OF THE CHAMBERS, THE STRUCTURAL BACKFILL, AND THE INSTALLATION REQUIREMENTS SHALL ENSURE THAT THE LOAD FACTORS SPECIFIED IN THE AASHTO LRFD BRIDGE DESIGN SPECIFICATIONS, SECTION 12.12, ARE MET FOR: 1) 5. JOINTS BETWEEN CHAMBERS SHALL BE PROPERLY SEATED PRIOR TO PLACING STONE. LONG -DURATION DEAD LOADS AND 2) SHORT -DURATION LIVE LOADS, BASED ON THE AASHTO DESIGN TRUCK WITH CONSIDERATION FOR IMPACT AND MULTIPLE VEHICLE PRESENCES. 6. MAINTAIN MINIMUM 9" (230 mm) SPACING BETWEEN THE CHAMBER ROWS. 6. CHAMBERS SHALL BE DESIGNED, TESTED AND ALLOWABLE LOAD CONFIGURATIONS DETERMINED IN ACCORDANCE WITH ASTM F2787, 7• INLET AND OUTLET MANIFOLDS MUST BE INSERTED A MINIMUM OF 12" (300 mm) INTO CHAMBER END CAPS. "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". 8. EMBEDMENT STONE SURROUNDING CHAMBERS MUST BE A CLEAN, CRUSHED, ANGULAR STONE MEETING THE AASHTO M43 DESIGNATION OF #3 LOAD CONFIGURATIONS SHALL INCLUDE: 1) INSTANTANEOUS (<t MIN) AASHTO DESIGN TRUCK LIVE LOAD ON MINIMUM COVER 2) OR #4. MAXIMUM PERMANENT (75-YR) COVER LOAD AND 3) ALLOWABLE COVER WITH PARKED (1-WEEK) AASHTO DESIGN TRUCK. 9. STONE SHALL BE BROUGHT UP EVENLY AROUND CHAMBERS SO AS NOT TO DISTORT THE CHAMBER SHAPE. STONE DEPTHS SHOULD NEVER 7. REQUIREMENTS FOR HANDLING AND INSTALLATION: DIFFER BY MORE THAN 12" (300 Tim) BETWEEN ADJACENT CHAMBER ROWS. • TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS. 10. STONE MUST BE PLACED ON THE TOP CENTER OF THE CHAMBER TO ANCHOR THE CHAMBERS IN PLACE AND PRESERVE ROW SPACING. • TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 3'. 11. THE CONTRACTOR MUST REPORT ANY DISCREPANCIES WITH CHAMBER FOUNDATION MATERIAL BEARING CAPACITIES TO THE SITE DESIGN • TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT AS DEFINED IN ENGINEER. SECTION 6.2.8 OF ASTM F2418 SHALL BE GREATER THAN OR EQUAL TO 500 LBS/IN/IN. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73° F 123° C), CHAMBERS SHALL BE PRODUCED FROM 12. ADS RECOMMENDS THE USE OF "FLEXSTORM CATCH IT" INSERTS DURING CONSTRUCTION FOR ALL INLETS TO PROTECT THE SUBSURFACE REFLECTIVE GOLD OR YELLOW COLORS. STORMWATER MANAGEMENT SYSTEM FROM CONSTRUCTION SITE RUNOFF. 8. ONLY CHAMBERS THAT ARE APPROVED BY THE SITE DESIGN ENGINEER WILL BE ALLOWED. UPON REQUEST BY THE SITE DESIGN NOTES FOR CONSTRUCTION EQUIPMENT ENGINEER OR OWNER, THE CHAMBER MANUFACTURER SHALL SUBMIT A STRUCTURAL EVALUATION FOR APPROVAL BEFORE DELIVERING CHAMBERS TO THE PROJECT SITE AS FOLLOWS: 1. STORMTECH MC4500 CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH MC-3500/MC-4500 CONSTRUCTION GUIDE". • THE STRUCTURAL EVALUATION SHALL BE SEALED BY A REGISTERED PROFESSIONAL ENGINEER. . THE STRUCTURAL EVALUATION SHALL DEMONSTRATE THAT THE SAFETY FACTORS ARE GREATER THAN OR EQUAL TO 1.95 FOR 2. THE USE OF EQUIPMENT OVER MC4500 CHAMBERS IS LIMITED: DEAD LOAD AND 1,75 FOR LIVE LOAD, THE MINIMUM REQUIRED BY ASTM F2787 AND BY SECTIONS 3 AND 12.12 OF THE AASHTO • NO EQUIPMENT IS ALLOWED ON BARE CHAMBERS. LRFD BRIDGE DESIGN SPECIFICATIONS FOR THERMOPLASTIC PIPE. . • NO RUBBER TIRED LOADER DUMP TRUCK OR EXCAVATORS ARE ALLOWED UNTIL PROPER FILL DEPTHS ARE REACHED IN ACCORDANCE • THE TEST DERIVED CREEP MODULUS AS SPECIFIED IN ASTM F2418 SHALL BE USED FOR PERMANENT DEAD LOAD DESIGN WITH THE "STORMTECH MC-3500/MC-4500 CONSTRUCTION GUIDE". EXCEPT THAT IT SHALL BE THE 75-YEAR MODULUS USED FOR DESIGN. WEIGHT LIMITS FOR CONSTRUCTION EQUIPMENT CAN BE FOUND IN THE "STORMTECH MC-3500/MC4500 CONSTRUCTION GUIDE". 9. CHAMBERS AND END CAPS SHALL BE PRODUCED AT AN ISO 9001 CERTIFIED MANUFACTURING FACILITY. 3. FULL 36" 900 mm OF STABILIZED COVER MATERIALS OVER THE CHAMBERS IS REQUIRED FOR DUMP TRUCK TRAVEL OR DUMPING. ( ) USE OF A DOZER TO PUSH EMBEDMENT STONE BETWEEN THE ROWS OF CHAMBERS MAY CAUSE DAMAGE TO CHAMBERS AND IS NOT AN ACCEPTABLE BACKFILL METHOD. ANY CHAMBERS DAMAGED BY USING THE "DUMP AND PUSH" METHOD ARE NOT COVERED UNDER THE STORMTECH STANDARD WARRANTY. CONTACT STORMTECH AT 1-888-892-2694 WITH ANY QUESTIONS ON INSTALLATION REQUIREMENTS OR WEIGHT LIMITS FOR CONSTRUCTION EQUIPMENT. .1-ADS.IN BAYSAVER BAYFILTER SPECIFICATIONS PRODUCTS A. INTERNAL COMPONENTS: ALL COMPONENTS INCLUDING CONCRETE STRUCTURE(S), PVC MANIFOLD PIPING AND FILTER CARTRIDGES, SHALL BE PROVIDED BY BAYSAVER TECHNOLOGIES LLC, 1030 DEER HOLLOW DRIVE, MOUNT AIRY, MD (800.229.7283). B. PVC MANIFOLD PIPING: ALL INTERNAL PVC PIPE AND FITTINGS SHALL MEET ASTM D1785. MANIFOLD PIPING SHALL BE PROVIDED TO THE CONTRACTOR PARTIALLY PRE-CUT AND PRE -ASSEMBLED, C. FILTER CARTRIDGES: EXTERNAL SHELL OF THE FILTER CARTRIDGES SHALL BE SUBSTANTIALLY CONSTRUCTED OF POLYETHYLENE OR EQUIVALENT MATERIAL ACCEPTABLE TO THE MANUFACTURER. FILTRATION MEDIA SHALL BE ARRANGED IN A SPIRAL LAYERED FASHION TO MAXIMIZE AVAILABLE FILTRATION AREA. AN ORIFICE PI -ATE SHALL BE SUPPLIED WITH EACH CARTRIDGE TO RESTRICT THE FLOW RATE TO A MAXIMUM OF 45 GPM. D. FILTER MEDIA: FILTER MEDIA SHALL BE BY BAYSAVER TECHNOLOGIES LLC AND SHALL CONSIST OF THE FOLLOWING MIX: A BLEND OF ZEOUTE, PERLITE AND ACTIVATED ALUMINA. E. PRECAST CONCRETE VAULT: CONCRETE STRUCTURES SMALL BE PROVIDED ACCORDING TO ASTM C. THE MATERIALS AND STRUCTURAL DESIGN OF THE DEVICES SHALL BE PER ASTM C478, C857 AND C858. PRECAST CONCRETE SHALL BE PROVIDED BY BAYSAVER TECHNOLOGIES, LLC. PERFORMANCE A. THE STORMWATER FILTER SYSTEM SHALL BEAN OFFLINE DESIGN CAPABLE OF TREATING 100% OF THE REQUIRED TREATMENT FLOW AT FULL SEDIMENT LOAD CONDITIONS. B. THE STORMWATER FILTER SYSTEM'S CARTRIDGES SHALL HAVE NO MOVING PARTS. C. THE STORMWATER TREATMENT UNIT SHALL BE DESIGNED TO REMOVE AT LEAST 85% OF SUSPENDED SOLIDS 65% OF TOTAL PHOSPHORUS 65% OF TURBIDITY 40% OF TOTAL COPPER AND 40 % OF TOTAL ZINC BASED ON FIELD DATA COLLECTED IN COMPLIANCE WITH THE TECHNOLOGY ACCEPTANCE RECIPROCITY PARTNERSHIP TIER II TEST PROTOCOL. D. THE STORMWATER FILTRATION SYSTEM SHALL REDUCE INCOMING TURBIDITY (MEASURED AS NTUs) BY 50% OR MORE AND SHALL NOT HAVE ANY COMPONENTS THAT LEACH NITRATES OR PHOSPHATES. E. THE STORMWATER FILTRATION CARTRIDGE SHALL BE EQUIPPED WITH A HYDRODYNAMIC BACKWASH MECHANISM TO EXTEND THE FILTERS LIFE AND OPTIMIZE ITS PERFORMANCE. F. THE STORMWATER FILTRATION SYSTEM SHALL BE DESIGNED TO REMOVE A MINIMUM OF 65% OF THE INCOMING TOTAL PHOSPHORUS (TP) LOAD. G. THE STORMWATER FILTRATION SYSTEM'S CARTRIDGES SHALL HAVE A TREATED SEDIMENT CAPACITY FOR 80 % TSS REMOVAL BETWEEN 150-350 LBS. BAYFILTER MAINTENANCE THE BAYFILTER SYSTEM REQUIRES PERIODIC MAINTENANCE TO CONTINUE OPERATING AT ITS PEAK EFFICIENCY DESIGN, THE MAINTENANCE PROCESS COMPRISES THE REMOVAL AND REPLACEMENT OF EACH BAYFILTER CARTRIDGE AND THE CLEANING OF THE VAULT OR MANHOLE WITH A VACUUM TRUCK. FOR BEST RESULTS, BAYFILTER MAINTENANCE SHOULD BE PERFORMED BY A CERTIFIED MAINTENANCE CONTRACTOR. A QUICK CALL TO AN ADS ENGINEER OR CUSTOMER SERVICE REPRESENTATIVE WILL PROVIDE YOU WITH A LIST OF RELIABLE CONTRACTORS IN YOUR AREA. WHEN BAYFILTER IS INITIALLY INSTALLED WE RECOMMEND THAT AN INSPECTION BE PERFORMED ON THE SYSTEM IN THE FIRST SIX 6 MONTHS. AFTER THAT THE INSPECTION CYCLE TYPICALLY FALLS INTO A BIANNUAL PATTERN GIVEN NORMAL STORM OCCURRENCE AND ACTUAL SOLIDS LOADS. WHEN BAYFILTER EXHIBITS FLOWS BELOW DESIGN LEVELS, THE SYSTEM SHOULD BE INSPECTED AND MAINTAINED AS SOON AS PRACTICAL. REPLACING A BAYFILTER CARTRIDGE SHOULD BE CONSIDERED AT OR ABOVE THE LEVEL OF THE MANIFOLD. MAINTENANCE PROCEDURES 1. REMOVE THE MANHOLE COVERS AND OPEN ALL ACCESS HATCHES. 2. BEFORE ENTERING THE SYSTEM MAKE SURE THE AIR IS SAFE PER OSHA STANDARDS OR USE A BREATHING APPARATUS. USE LOW 02, HIGH CO OR OTHER APPLICABLE WARNING DEVICES PER REGULATORY REQUIREMENTS. 3. USING A VACUUM TRUCK REMOVE ANY LIQUID AND SEDIMENTS THAT CAN BE REMOVED PRIOR TO ENTRY. 4. USING A SMALL LIFT OR THE BOOM OF THE VACUUM TRUCK, REMOVE THE USED CARTRIDGES BY LIFTING THEM OUT. 5. ANY CARTRIDGES THAT CANNOT BE READILY LIFTED CAN BE EASILY SLID ALONG THE FLOOR TO A LOCATION THEY CAN BE LIFTED VIA A BOOM LIFT. 6. WHEN ALL THE CARTRIDGES HAVE BEEN REMOVED, IT IS NOW PRACTICAL TO REMOVE THE BALANCE OF THE SOLIDS AND WATER. LOOSEN THE STAINLESS CLAMPS ON THE FERNCO COUPLINGS FOR THE MANIFOLD AND REMOVE THE DRAINPIPES AS WELL. CAREFULLY CAP THE MANIFOLD AND THE FERNCO'S AND RINSE THE FLOOR, WASHING AWAY THE BALANCE OF ANY REMAINING COLLECTED SOLIDS. 7. CLEAN THE MANIFOLD PIPES, INSPECT, AND REINSTALL. 8. INSTALL THE EXCHANGE CARTRIDGES AND CLOSE ALL COVERS. 9. THE USED CARTRIDGES MUST BE SENT BACK TO ADS FOR EXCHANGE/RECYCLING AND CREDIT ON UNDAMAGED UNITS. BAYFILTER INSTALLATION NOTES 1. CONTACT UTILITY LOCATOR TO MARK ANY NEARBY UNDERGROUND UTILITIES AND MAKE SURE IT IS SAFE TO EXCAVATE. 2. REFERENCE THE SITE PLAN AND STAKE OUT THE LOCATION OF THE BAYFILTER VAULT. 3. EXCAVATE THE HOLE PROVIDING ANY SHEETING AND SHORING NECESSARY TO COMPLY WITH ALL FEDERAL STATE AND LOCAL SAFETY REGULATIONS. 4. LEVEL THE SUB -GRADE TO THE PROPER ELEVATION. VERIFY THE ELEVATION AGAINST THE MANHOLE DIMENSIONS, THE INVERT ELEVATIONS AND THE SITE PLANS. ADJUST THE BASE AGGREGATE IF NECESSARY. 5. HAVE THE SOIL BEARING CAPACITY VERIFIED BY A LICENSED/ENGINEER FOR THE REQUIRED LOAD BEARING CAPACITY. ON SOLID SUB -GRADE, SET THE FIRST SECTION OF THE BAYFILTER PRE -CAST VAULT. 6. CHECK THE LEVEL AND ELEVATION OF THE FIRST SECTION TO ENSURE IT IS CORRECT BEFORE ADDING ANY RISER SECTIONS. 7. IF ADDITIONAL SECTION(S) ARE REQUIRED, ADD A WATERTIGHT SEAL TO THE FIRST SECTION OF THE BAYFILTER VAULT. SET ADDITIONAL SECTION(S) OF THE VAULT ADDING A WATERTIGHT SEAL TO EACH JOINT. 8. INSTALL THE PVC OUTLET MANIFOLD. 9. INSTALL THE PVC OUTLET PIPE IN BAYFILTER VAULT. 10. INSTALL THE INLET PIPE TO THE BAYFILTER VAULT. 11. AFTER THE SITE IS STABILIZED, REMOVE ANY ACCUMULATED SEDIMENT OR DEBRIS FROM THE VAULT AND INSTALL THE FLOW DISKS, DRAINDOWN MODULES (IF APPLICABLE), AND THE BAYFILTER CARTRIDGES. 12. PLACE FULL SET OF HOLD DOWN BARS AND BRACKETS INTO PLACE. PROPOSEDLAYOUT 32 STORMTECH MC4500 CHAMBERS CC S 4 STORMTECH MG4500 END CAPS 12 STONE ABOVE (in) 30 STONE BELOW in 40 %STONE VOID INSTALLED SYSTEM VOLUME (CF) ABOVE ELEVATION 405.50 7027 (PERIMETER STONE INCLUDED) 1632 SYSTEM AREA (ft') 203 SYSTEM PERIMETER (ft) NOTES • MANIFOLD SIZE TO BE DETERMINED BY SITE DESIGN ENGINEER. SEE TECHNICAL NOTE 6.32 FOR MANIFOLD SIZING GUIDANCE. DUE TO THE ADAPTATION OF THIS CHAMBER SYSTEM TO SPECIFIC SITE AND DESIGN CONSTRAINTS, IT MAY BE NECESSARY TO CUT AND COUPLE ADDITIONAL PIPE TO STANDARD MANIFOLD COMPONENTS IN THE FIELD. • THE SITE DESIGN ENGINEER MUST REVIEW ELEVATIONS AND IF NECESSARY ADJUST GRADING TO ENSURE THE CHAMBER COVER REQUIREMENTS ARE MET. • THIS CHAMBER SYSTEM WAS DESIGNED WITHOUT SITE -SPECIFIC INFORMATION ON SOIL CONDITIONS OR BEARING CAPACITY. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR DETERMINING THE SUITABILITY OF THE SOIL AND PROVIDING THE BEARING CAPACITY OF THE INSITU SOILS. THE BASE STONE DEPTH MAY BE INCREASED OR DECREASED ONCE THIS INFORMATION IS PROVIDED. • THE SITE DESIGN ENGINEER MUST REVIEW THE PROXIMITY OF THE CHAMBERS TO THE RETAINING WALL AND CONSIDER EFFECTS OF POSSIBLE SATURATED SOILS ON THE RETAINING WALLS INTEGRITY. W (� _J O lL = > W 0 J z 3 QQ C O 5 o X - o � o w - w a U Q ^, S PROPOSED ELEVATIONS it °� I 1. 419.00 MAXIMUM ALLOWABLE GRADE (TOP OF PAVEMENT/UNPAVED) [UL[ g' m i 414.50 MINIMUM ALLOWABLE GRADE (UNPAVED WITH TRAFFIC) = r) d6 0 414.00 MINIMUM ALLOWABLE GRADE (UNPAVED NO TRAFFIC) '-' LU 414.00 MINIMUM ALLOWABLE GRADE (BASE OF FLEXIBLE PAVEMENT) ui It 414.00 MINIMUM ALLOWABLE GRADE (TOP OF RIGID PAVEMENT) It 413.00 TOP OF STONE I O . 412.00 TOP OF MC4500 CHAMBER 409.73 15" TOP MANIFOLD INVERT M 407.19 24" ISOLATOR ROW CONNECTION INVERT = 1. 407.16 18" BOTTOM MANIFOLD INVERT 407.00 BOTTOM OF MC4500 CHAMBER � 405.50 UNDERDRAIN INVERT c € y 404.50 BOTTOM OF STONE R � E BAYFILTER WQU AS SPECIFIED (SEE SHEET 4 FOR DETAILS) _\ 9 15" X 15" ADS N-12 TOP MANIFOLD INVERT 32.72" ABOVE CHAMBER BASE (SEE NOTES) STRUCTURE PER PLAN W/ELEVATED BYPASS MANIFOLD MAXIMUM INLET FLOW 3.5 CFS (DESIGN BY ENGINEER / PROVIDED BY OTHERS) PLACE MINIMUM 17.5' OF ADS GEOSYNTHETICS 315WTM WOVEN \ GEOTEXTILE OVER BEDDING STONE AND UNDERNEATH CHAMBER FEET FOR SCOUR PROTECTION AT ALL CHAMBER INLET ROWS 6" ADS N-12 DUAL WALL PERFORATED HOPE UNDERDRAIN (SIZE TBD BY ENGINEER) >_ , I I I I 1 1 I 7- - / , ,I INSPECTION PORT ISOLATOR ROW (SEE DETAIL) 24" CORED END CAP, PART# MC460OREPE24BC OR MC450OREPE24BW TYP OF ALL MC4500 24" BOTTOM CONNECTIONS AND ISOLATOR ROWS 69.52' 81.52' 0 18" CORED END CAP, PART# MC450OREPE18TC OR MC450OREPE18TW TYP OF ALL MC4500 18" TOP CONNECTIONS 18" X 18" ADS N-12 BOTTOM MANIFOLD INVERT 1.97" ABOVE CHAMBER BASE (SEE NOTES) a PROPOSED STRUCTURE WNVEIR MAXIMUM INLET FLOW 5.5 CFS (DESIGN BY ENGINEER / PROVIDED BY OTHERS) WEIR TOP=410.00 -., 1. G W w .� 9. ;o 0 �I -- o E 9 C1 m 'o > N O m O N x Z v gFg Q LU O :)d Of °o O J w O J g V_ D E ? 0 0 SHEET 3 OF 7 n Iu 0 5 8 1. 1. 11 1. 12 24" SOLID LID' CONTROL WEIR (DESIGN BY ENGINEER) WEIR TOP=410.08 18" INLET PIPE 11.1T I [134.04"] 10.50' 10.02' 1126.041 1120.249 1 [51.969 132.041 \ 18" OUTLET PIPE 6" INLET PIPE 6" INLET ORIFICE TROLLEY SECTION A -A SCALE: 1/4" = 1' 36" SOLID LID 410.08 WQv ACCEPTED D STEPS (TYP) 1-YR WSE=406.49 18" OUTLET PIPE 10-YR WSE=409.73 530 BAYFILTER CARTRIDGE (TYP) 25-YR WSE=411.48 - - .-.---. 416 072-14 .I -��-� __ 405.50 I 4" FLEXIBLE COUPLER (TYP) 4" PVC OUTLET MANIFOLD 4" PVC TEE W/FLOW DISK '' • . (TYP EACH CARTRIDGE LOCATION) '------- 402.83 [PROPOSED] ACCEPTED VERTICAL DRAIN � . . I DOWN MODULE (TYP) 4" PVC OUTLET MANIFOLD I 4" PVC TEE W/ FLOWDISK (TYP) 4" FLEXIBLE COUPLER . I D STEPS TYP 36" SOLID LID THE OUTLET INVERT NEEDS TO BE LOWERED FOR THE BAYFILTER TO FUNCTION. THE DESIGN ENGINEER MUST CHECK THIS PROPOSED INVERT MODIFICATION TO ENSURE THE PROJECT'S DESIGN REQUIREMENTS ARE MET. ITHE INVERTS AS VERIFIED SHOWN ARE BY DESIGN ENGINEER. 530 BAYFILTER BAYFILTER p4jC10 BF-1 OUTLET PIPE 6-8-3 AIR RELEASE VALVE WATER QUALITY VOLUME 6,924 CF DRAINAGE AREA POLYMER SEAL CARTRIDGE DESIGN VOLUME 2500 CF # BAYFILTER CARTRIDGES 3 INLET DRAINAGE f MATERIAL OUTLET PATHWAY CAPTURED SEDIMENT CAPACITY` 1 786 LBS THE BAYFILTER STORMWATER MANAGEMENT SYSTEM IS A MEDIA SPIRAL FLOW CONTROL ORIFICE STORMWATER FILTRATION DEVICE DESIGNED TO REMOVE FINE SEDIMENTS HEAVY METALS AND PHOSPORUS. THE BAYFILTER SYSTEM RELIES ON A SPIRAL WOUND MEDIA FILTER CARTRIDGE OUTLET DRAINAGE i MATERIAL WITH APPROXIMATELY 90 SQUARE FEET OF FILTRATION AREA. THE INLET PLATE FILTER CARTRIDGES ARE HOUSED IN A CONCRETE STRUCTURE THAT EVENLY DISTRIBUTES THE FLOW BETWEEN CARTRIDGES. I. THE SYSTEM IS INLINE WITH AN INTERNAL BYPASS THAT ROUTES �A,- � I � III - P. FILTER LEG HIGH INTENSITY STORMS AROUND THE CARTRIDGES. THE FILTER -Z CARTRIDGES REMOVE POLLUTANTS FROM RUNOFF BY FILTRATION = OUTLEr (INTERCEPTION/ATTACHMENT) AND ADSORPTION. :: couecrlDN MANIFOLD 'SEDIMENT CAPTURE PER CURRENT NJDEP APPROVAL 6.00, PLAN VIEW SCALE: 1/4' = 1' j4CCEPTABLE FILL MATERIALS: STORMTECH MC-4500 CHAMBER SYSTEMS CONTROL WEIR (DESIGN BY ENGINEER) WEIR TOP=410.08 24" SOLID LID 18" INLET PIPE a b <_ N 6" INLET PIPE 6" INLET ORIFICE c 530 BAYFILTER CARTRIDGE (TYP) 4" PVC PLUG (TYP) HOLD DOWN BAR TYP AASHTO MATERIAL MATERIAL LOCATION DESCRIPTION COMPACTION / DENSITY REQUIREMENT CLASSIFICATIONS FINAL FILL: FILL MATERIAL FOR LAYERED' STARTS FROM THE PREPARE PER SITE DESIGN ENGINEER'S PLANS. PAVED D TOP OF THE'C' LAYER TO THE BOTTOM OF FLEXIBLE ANY SOIL/ROCK MATERIALS, NATIVE SOILS, OR PER ENGINEER'S PLANS. N/A INSTALLATIONS MAY HAVE STRINGENT MATERIAL AND PAVEMENT OR UNPAVED FINISHED GRADE ABOVE. NOTE THAT CHECK PLANS FOR PAVEMENT SUBGRADE REQUIREMENTS. PREPARATION REQUIREMENTS. PAVEMENT SUBBASE MAY BE PART OF THE'D' LAYER AASHTO M1451 INITIAL FILL: FILL MATERIAL FOR LAYER'C' SITARTS FROM THE GRANULAR WELL -GRADED SOIL/AGGREGATE MIXTURES, <35% FINES OR A-1, A-24, A-3 BEGIN COMPACTIONS AFTER 24" (600 mm) OF MATERIAL OVER TOP OF THE EMBEDMENT STONE ('B' LAYER) TO 24" (600 mm) PROCESSED AGGREGATE. THE CHAMBERS IS REACHED. COMPACT ADDITIONAL LAYERS IN C ABOVE THE TOP OF THE CHAMBER. NOTE THAT PAVEMENT OR 12" (300 mm) MAX LIFTS TO A MIN. 95 % PROCTOR DENSITY FOR SUBBASE MAY BE A PART OF THE'C' LAYER. MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEU OF THIS WELL GRADED MATERIAL AND 95% RELATIVE DENSITY FOR LAYER. AASHTO M43' PROCESSED AGGREGATE MATERIALS. 3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 EMBEDMENT STONE: FILL SURROUNDING THE CHAMBERS AASHTO M43' B FROM THE FOUNDATION STONE (W LAYER) TO THE'C' LAYER CLEAN, CRUSHED, ANGULAR STONE 3,4 NO COMPACTION REQUIRED. ABOVE. A FOUNDATION STONE: FILL BELOW CHAMBERS FROM THE CLEAN, CRUSHED, ANGULAR STONE AASHTO M431 PLATE COMPACT OR ROLL TO ACHIEVE A FLAT SURFACE zs SUBGRADE UP TO THE FOOT (BOTTOM) OF THE CHAMBER. 3,4 PLEASE NOTE: 1. THE LISTED AASHTO DESIGNATIONS ARE FOR GRADATIONS ONLY. THE STONE MUST ALSO BE CLEAN CRUSHED ANGULAR. FOR EXAMPLE A SPECIFICATION FOR #4 STONE WOULD STATE: "CLEAN CRUSHED ANGULAR NO. 4 AASHTO M43 STONE". 2. STORMTECH COMPACTION REQUIREMENTS ARE MET FORA' LOCATION MATERIALS WHEN PLACED AND COMPACTED IN 9" (230 mm) (MAX) LIFTS USING TWO FULL COVERAGES WITH A VIBRATORY COMPACTOR. 3. WHERE INFILTRATION SURFACES MAY BE COMPROMISED BY COMPACTION FOR STANDARD DESIGN LOAD CONDITIONS A FLAT SURFACE MAY BE ACHIEVED BY RAKING OR DRAGGING WITHOUT COMPACTION EQUIPMENT. FOR SPECIAL LOAD DESIGNS CONTACT STORMTECH FOR COMPACTION REQUIREMENTS. 4. ONCE LAYER'C' IS PLACED, ANY SOIL/MATERIAL CAN BE PLACED IN LAYER'D' UP TO THE FINISHED GRADE. MOST PAVEMENT SUBBASE SOILS CAN BE USED TO REPLACE THE MATERIAL REQUIREMENTS OF LAYER 'C' OR 'D' AT THE SITE DESIGN ENGINEER'S DISCRETION. ADS GEOSYNTHETICS 601T NON -WOVEN GEOTEXTILE ALL AROUND CLEAN, CRUSHED, ANGULAR STONE IN A & B LAYERS PAVEMENT LAYER DESIGNED BY SITE DESIGN ENGINEER) ..ru..�r,.v..v,.�./..�.u,.v.u.. r,.m-u,-v..u..u.-�,�.w,.y. D •TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED INSTALLATIONS WHERERUTTING MOM VEHICLES MAY OCCUR n 7.0' I PERIMETER STONE /� NCREASECOVER T030"I>SOmmI. 24(2.1m) (SEE NOTE 4) C I (600 mm) MIN" MAX 12" 300 mm MIN © - EXCAVATION WALL 60' CAN BE SLOPED OR VERTICAL (1 524 mm) A DEPTH OF STONE TO BE DETERMINED 12" (300 mm) MIN � BY SITE DESIGN ENGINEER 9" (230 mm) MIN 9 100" (2540 mm) 12" (300 mm) MIN MC4500 //t J 230 mm END CAP SUBGRADE NOTE ( ) MIN DEPTH OF STONE (SEE NOTE 3) BEDDING=12" NOTES: 1. CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418.16a, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS" CHAMBER CLASSIFICATION 60x101 2. MC4500 CHAMBERS SHALL BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". 3. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR ASSESSING THE BEARING RESISTANCE (ALLOWABLE BEARING CAPACITY) OF THE SUBGRADE SOILS AND THE DEPTH OF FOUNDATION STONE WITH CONSIDERATION FOR THE RANGE OF EXPECTED SOIL MOISTURE CONDITIONS. 4. PERIMETER STONE MUST BE EXTENDED HORIZONTALLY TO THE EXCAVATION WALL FOR BOTH VERTICAL AND SLOPED EXCAVATION WALLS. 5. REQUIREMENTS FOR HANDLING AND INSTALLATION: • TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING CHAMBERS SHALL HAVE INTEGRAL INTERLOCKING STACKING LUGS. • TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 3". • TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT AS DEFINED IN SECTION 6.2.8 OF ASTM F2418 SHALL BE GREATER THAN OR EQUAL TO 500 LBS/IN/IN. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73° F / 23° C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS. COVER PIPE CONNECTION TO END CAP WITH ADS GEOSYNTHETICS 601T NON -WOVEN GEOTEXTILE STORMTECH HIGHLY RECOMMENDS FLEXSTORM PURE INSERTS IN ANY UPSTREAM T STRUCTURES WITH OPEN GRATES _ ELEVATED BYPASS MANIFOLD CATCH BASIN OR MANHOLE SUMP DEPTH TBD BY SITE DESIGN ENGINEER (24" [600 mm] MIN RECOMMENDED) NO SUMP PROPOSED INSPECTION & MAINTENANCE STEP 1) INSPECT ISOLATOR ROW FOR SEDIMENT MC-4500 CHAMBER 24" (600 mm) HDPE ACCESS PIPE REQUIRED // USE FACTORY PRE -CORED END CAP PART #: MC450OREPE24BC OR MC450OREPE24BW MC-4500 ISOLATOR ROW DETAIL NTS A. INSPECTION PORTS (IF PRESENT) A.I. REMOVEIOPEN LID ON NYLOPLAST INLINE DRAIN A.2. REMOVE AND CLEAN FLEXSTORM FILTER IF INSTALLED A.3. USING A FLASHLIGHT AND STADIA ROD, MEASURE DEPTH OF SEDIMENT AND RECORD ON MAINTENANCE LOG A.4. LOWER A CAMERA INTO ISOLATOR ROW FOR VISUAL INSPECTION OF SEDIMENT LEVELS (OPTIONAL) A.5. IF SEDIMENT IS AT, OR ABOVE, 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. B. ALL ISOLATOR ROWS B.1. REMOVE COVER FROM STRUCTURE AT UPSTREAM END OF ISOLATOR ROW B.2. USING A FLASHLIGHT, INSPECT DOWN THE ISOLATOR ROW THROUGH OUTLET PIPE 1) MIRRORS ON POLES OR CAMERAS MAY BE USED TO AVOID A CONFINED SPACE ENTRY ii) FOLLOW OSHA REGULATIONS FOR CONFINED SPACE ENTRY IF ENTERING MANHOLE B.3. IF SEDIMENT IS AT, OR ABOVE, 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. STEP 2) CLEAN OUT ISOLATOR ROW USING THE JETVAC PROCESS A. A FIXED CULVERT CLEANING NOZZLE WITH REAR FACING SPREAD OF 45" (1.1 m) OR MORE IS PREFERRED B. APPLY MULTIPLE PASSES OF JETVAC UNTIL BACKFLUSH WATER IS CLEAN C. VACUUM STRUCTURE SUMP AS REQUIRED STEP 3) REPLACE ALL COVERS, GRATES, FILTERS, AND LIDS; RECORD OBSERVATIONS AND ACTIONS, STEP 4) INSPECT AND CLEAN BASINS AND MANHOLES UPSTREAM OF THE STORMTECH SYSTEM. NOTES 1. INSPECT EVERY 6 MONTHS DURING THE FIRST YEAR OF OPERATION. ADJUST THE INSPECTION INTERVAL BASED ON PREVIOUS OBSERVATIONS OF SEDIMENT ACCUMULATION AND HIGH WATER ELEVATIONS. 2. CONDUCT JETTING AND VACTORING ANNUALLY OR WHEN INSPECTION SHOWS THAT MAINTENANCE IS NECESSARY. CONCRETE PAVEM CONCRETE SLAB 6" (150 mm) MIN THICKNE: STORMTECH CHAMBER J O > O O E J Z Y F Q U!11 __�W G U s > F- F- � m o c) Zj - � g W i S �;3 U d£ o €w c �W w o h N -! >O m� y J Qo uoZ �o � s�� Q�I- a3E- o2 "s R ❑ o J N 2 m ,4, o Qa X w O o X1. °o W w I- B oX _ z e o a SHEET 4' OF 7 J O � 0 8 t o s Q J w w J LU G U zo W > o ro �!O p � R 9 W it g v 2 W 3:0 4E o L) LU W °� po a rc .� IV wa R� „G "' a �Q F Q p� 5 a3 H c og 9 9E z. off 3 � � WC2 -- w I � � oz. E j o< i E 6 0 � Y/ Ro o fl '0 8�g 10 iF m o v w W O °o 0 XW ow O - J - wI y J ( - O i EN e o� . m11 yo .z 0 V U SHEET 5 of 7 OPTIONAL INSPECTION PORT Q J C O U „ t MC4500 END CAP W LLI z o 0 w - (� J 3Q U " �L JQ C = G J W C U 8 °' a O O STONE TOP 413.00 U W j � a W Q m 3 CHAMBER TOP 412.00 U � o IIIIIIII IIIIIIII'llA I YII CHAMBER INV=407.00 i y STONE BOTTOM 404.50 € TWO LAYERS OF ADS GEOSYNTHETICS 315WTM WOVEN w GEOTEXTILE BETWEEN FOUNDATION STONE AND CHAMBERS 10.3' (3.1 m) MIN WIDE CONTINUOUS FABRIC WITHOUT SEAMS rc )NCRETE COLLAR NOT REQUIRED 1 - � w IR UNPAVED APPLICATIONS = o y 8" NYLOPLAST INSPECTION PORT I o BODY (PART# 2708AG41PKIT) OR TRAFFIC RATED BOX W/SOLID _ 0 ; . F 8 I� LOCKING COVER 4" 100 mm SCHED 40 PVC L .1 o 4" If 00 mm) SCHED 40 PVC 4" (100 mm) SCHED 40 PVC O Q I. p B I. 3 1 COUPLING vIl $ R m o 4" (100 mm) o J N a 8„ T SCHED 40 PVC (200 mm) J t m m F CORE 4.5"(114 mm)O Q= O s o HOLE IN CHAMBER (4.5" HOLE SAW REQ'D) Icy, It X I- < V J J °o m a ANY VALLEY - LOCATION NOTES: 1. INSPECTION PORTS MAYBE CONNECTED THROUGH ANY CHAMBER CONNECTION DETAIL CORRUGATION VALLEY. NTS o 2. ALL SCHEDULE 40 FITTINGS TO BE SOLVENT CEMENTED (4" PVC NOT PROVIDED BY ADS). 4" PVC INSPECTION PORT DETAIL NTS SHEET 6 OF 7 2 V � 1 0 � � 0 00 y 0 gz�ii O Z W O W 4 ^Z 17 0 1 Z �b tF,i - W d Z � W oI O I (� w� Z w4 D F O 7 N 0) (14 ~ N Q > �b,l 1 (n W _i I J �> Q~ I W ►� w W < 0 F Q J W It N I w �� T , - ✓ i .�;�§ V r�L- -*\ Y I a / ) `r . ,% !'' "m U JU IN M. SHIMP >- IC. No.. 45183 I O ..°(I ` 10 �� AA;; ,A ! L W j - 1 (A rn •J ) N 0) -- E E L U U \ � 7 7 0 0 U U r\�\1 V I4_� 1 q OC O cV � C14 \ 0 N cV R o >' " Scale Sheet No. C16 OF19 File No. 16.009 0MOASSISE'I p p stormTecn �' Figure 1- Inspection Port Detail FOR STORMTECH � �'I • � � Manifold, Scour Fabric and Chamber Assembly Table 1-Acceptable Fill Materials ' M43 Compaction/Density ` � U INSTRUCTIONS,TM ` Location , n- 2(5aommlMlNwro i Z DOWNLOAD THE Designation' CONCRETE COLLAR NOTREWIRED CTl O INSTALLATION APP a Y i IL• • ® 'Lh Requirement PoauNPAveoAwuunoNs r\`v`l;I • '• StormTech ' s @Final RII: RII Material far layer'D' Any sdVrock materials, native lolls WA Prepare per site design engineer's plans. Paved coxcRE E CA M A, Starts from the t of the'C' to the a e• NY (PART T NSPECTON PORT N [rJ op laye per engineers s plans. Check atallatiaa may have stringent material and prepare- PA EME R BODY (PART» O SOX 4 PN T)DR v . TRAFFCRATEo eox wlsouD W �� bottom offlexblepavemeMorunpaved plans tionrequiremems. 1 ocxNGCoveR eci o:oavC StormTech Construction Guide s finishedgmdeabweltiathepav requirements Z 1)I company J sY ment subbase ma be oftie'D'la cREmBAe sc„ED4BPc 4Doo rem, LLLILIr� '£ IMNTHICKNESS acxEo 4o PVC (� Y 3 ©Initial RII: FiII Material forayer'C' Granular well -graded sdV AAS iC0 M145 Begin compaction after min. 24" (600 rem) of mate 1 couPMNG 1 Z Y shads from the top of the embedment aggregate mixtures, <35%fides A-1, A-2-4, A-3 dalover tllechambers isreached. Compact addNoral ST-Eo„1-11R 4'(1.-) W REQUIRED MATERIALS AND EQUIPMENT LIST � �� stone ('B'layer)to24"(600mm)above or processed aggregate. Most or layers in12"OWmm) max. IftIDamin, 95%Proc- T III Acceptable fill materials per Table 1 StormTech solid end caps, pre -cored and pre -fabricated end caps _ the top ofthe chamber.Note that pave- pavement subbase materials can AA&MM431 tor denslryfor well -graded material and 95%relative a°emm) n CORE4S-(tNmm)0 W LL = ment subbase may be pan of the'C' layer. be used In lieu of this layer. 3, 357, 4, 467, 5, 56, 57, 6, density for processed aggregate materials. ROLE N cXaMeER t- ` • Woven and non -woven geotextiles • StormTech chambers, manifolds and fittings -" ?" 67,68,778,8,89,9,10 5"°�BAW'E°°I v Z Ell lA\v' w 0 - NOTE: MC-3500 chamber pallets are 77" x 90" (2.0 m x 2.3 m) and weigh about 2010 lbs. (912 kg) and MC-4500 pallets are 100" x 52" (2.5 m x 1.3 m) and ©FmbedmentStow Fillfhe Clean, crushed, angular stone AASHrOM431 Nocornpachonrequired. AN vA E I = surrounding chambers from the foundation 3, 357, 4 g ( 9)• 9 q ( ) (min.) (straps, ) srore('A'layajlotie'C'layeratave. NOTES, OCATION" weigh about 840 lbs. 381 k Unloading chambers requires 72" 1.8 m min. forks and/or tie downs stra s, chains, etc). 11 INSPECTION PORTS 1AW BE CONNECTED THROVGX ANY CHAMBER CONNECTION DETAIL /�� Alllllillllwk_/YL A rounaaborn stone: Fill below Clean, crushed, angular stone, AASKO M431 Place and core in 9" 230 mm max lifts using ' CUORRUGATUL VALLEY. Nis "II IMPORTANT NOTES: Install manifolds and lay out woven scour Align the first chamber and end cap of each Continue installing chambers by overlapping chamber end O bersfmmthesubgradeuptothe 3,357,4 two full coverages wMavibratorycompWo � sDHEouLADS) nNGSTOBESovENicEMENTED(4•wONo 1 � z3 2 PRovroED BV AD.R). A. This installation guide provides the minimum requirements for proper installation of chambers. Nonadherence to this guide may result in damage to chambers geotextile at inlet rows [min. 17.5 ft (5.33 m)] row with inlet pipes. Contractor may choose corrugations. Chamber joints are labeled "Lower Joint - foot podam)ofNchambec (n during installation. Replacement of damaged chambers during or after backfilling is costly and very time consuming. It is recommended that all installers are familiar at each inlet end cap. Place a continuous to postpone stone placement around end Overlap Here" and "Build this direction - Upper Joint" Be v piece (no seams) along entire length of chambers and leave ends of rows open sure that the chamber placement does not exceed the reach PLEASE NOTE: with this guide, and that the contractor inspects the chambers for distortion, damage and joint integrity as work progresses. 1. The listed apecro ation for are w gradations only. The stone must also .clean, crushed, angular. For �( Isolators Row(s) in two layers. for easy inspection of chambers during the of the construction equipment used to place the stone. example, a specification for #4 stone would state: "clean, crushed, angular no. 4 (AASHTO M43) stone". B. Use of a dozer to push embedment stone between the rows of chambers may cause damage to chambers and is not an acceptable backfill method. Any chambers backfill process. Maintain minimum 6" (150 mm) spacing between MC-3500 2. StormTech compaction requirements are met for A' location materials when placed and compacted in 9" (230 mm) damaged by using the "dump and push" method are not covered under the StormTech standard warranty. rows and 9" (230 mm) spacing between MC-4500 rows. (max) lifts using two full coverages with a vibratory compactor N For the Isolator Row place two continuous layers of ADS 3. Where infiltration surfaces maybe comprised by compaction, for standard installations and standard design load '� 0 C. Care should be taken in the handling of chambers and end caps. End caps must be stored standing upright. Avoid dropping, prying or excessive force on chambers Woven fabric between the foundation stone and the isolator during removal from pallet and initial placement. row chambers, making sure the fabric lays flat and extends conditions, a flat surface maybe achieved by raking or dragging without compaction equipment. For special load � N designs, contact StormTech for compaction requirements. � N the entire width of the chamber feet. Requirements for System Installation Manifold Insertion StormTech Isolator Row Detail > Figure 2 -Fill Material Locations I�-7?lJJ ((nn w • I® 12" (300 rem) MIN INSERTION STORMTECH COVER PIPE CONNECTION TO END END CAP (MC-4500 SHOWN) ADS GEOSYNTHETICS 601T NON -WOVEN GEOTEXTILE ALL PAVEMENT LAVER (DESIGNED (� _i END CAP CAP WITH ADS GEOSYNTHETICS OPTIONAL INSPECTION PORT AROUND CLEAN, CRUSHED, ANGULAR STONE IN A& B LAYERS V EDESIGN E ENGINEER) V J 601T NON -WOVEN GEOTEXTILE CHAMBER (MC-4500 SHOWN) I MANIFOATRUNK � D � �' -roeorrwoASFOO eonveNexr.F DrPnvEo n__._ , xs �RDNsw ERPRun .ROM„k E,N.Ya uR 4 T �, ,? PERIMETER STONE C xcaensa coves ro nvso-mI I MCi500-24"(600 mm)MIN MC-4500-7.0'(2.1 m)MAX ( ` - t [ t t� MC-3600. 18" (460 rem) MIN MC-3500 - 8.0' (2.4 m) MAX I W MANIFOL3 0. r O 12' (300 rem) MIN a EXCAVATION WALL w 0 (CAN BE SLOPED OR VERTICAL) MC4500 - 80" (1525 rem) Q -�- "C MC-3500-45"(1140 rem) �.` J W lY 111���"`III I CATCH BASIN ' OR 12 (300 rem) MANHOLE DEPTH OF STONE TO BE DETERMINED w D) U MIN SEPARATION \� MC-4500-12"(30Dmm)MIN / I BY SITE DESIGN ENGINEER 1(230 rem) MIN MG3500-8'(150 mm)MIN END CAP J/ MC3500-91(230 mm)MIN MC-0500-100'(2540 rem) Ilr 12^(300 mm)MIN NOTE: MANIFOLD STUB MUST BE LAID HORIZONTAL FOR SUSGRADE SOILS MC-3500-8"(150 mm)MIN MC_=_77"(1960 rem) A PROPER FIT IN END CAP OPENING. Excavate bed and prepare subgrade per Place non -woven geotextile over prepared soils Place clean, crushed, angular stone foundation engineer's plans. and u excavation walls. 9" 230 mm min. Install underdrains if required. USEF0mm)HOPE-C REDESS PIPE REQUIRED TWO TEXTILELAYERBETWEEN FF IDS OUNDATION ONE AN WOVEN 9 P P ( ) q Insert inlet and outlet manifolds a minimum 12" USE FACTORY PRE -CORED END CAP GEOTEXTILE BETWEEN FOUNDATION STONE AND CHAMBERS Compact to achieve a flat surface. MC-3500-8.3(2.5 m) MIN WIDE CONTINUOUS FABRIC STRIP P (300 mm) into chamber end caps. Manifold header SUMP DEPTH TSD BY MC-4500-10.3' (3.1 m) MIN WIDE CONTINUOUS FABRIC STRIP should be a minimum 12" (300 mm) from base of SITEDESII DESIGN ENGINEER (24" [800 mmJ MIN RECOMMENDED) 2 S : end cap. � r r 1, i 1F _[ iT 11 �ri1' NOTES: Table 2 - Maximum Allowable Construction Vehicle Loads' U "I 11 I M • 71 HIMP 1.36"(900mm)ofstabilizedcovermaterialsover theAllowable1 AllowableLoads' Allowable Roller 1.1 Initial Anchoring of Chambers - Embedment Stone Backfill of Chambers - Embedment Stone and Cover Stone ic. No. 45183 r•, chambers is required for full dump truck travel and , , , , . ,. ,,, , dumping. ,.,' Dynamic Ills [kN] 2. During paving operations, dump truck axle loads on (II) Final pp 36" [9001 32,000 [142] 16,000 [71] 12" [305) 3420 [1641 38,000 [1691 0 24" (600mm) of cover may be necessary. Precautions Mature Compacted 18" [457] 2350 [113] t should be taken to avoid rutting of the road base layer, 24" [6101 1850 [891 ki 30" [7621 1510 [72] X�,, to ensure that compaction requirements have been met, 36° 914 1310 - 4 and that a minimum of 24" (600mm) of cover exists ©Initial RII 24- [cool 32,000 [1421 16,000 [71] IT pOq 2480 [119] 20,000 [89] over the chambers. Contact StormTech for additional Material Compacted 18" (457] 1770 PSI �- guidance on allowable axle loads during paving. 24" [610] 1430 [68] 30" 1210 [581 '�` +�. `„•- .� l a 3. Ground pressure for track dozers is the vehicle 36" [914] 1070 [51] ig operating weight divided by total ground contact area 24- Ml 24,000 [1071 12,000 [53] 12" [3051 2245 [107] 16,000 [71] k �' for both tracks. Excavators will exert higher ground LoosBDumped 18" [457) 13251" 24" [610] 1325 [781 pressures based on loaded bucket weight and boom 30" [762) 1135 [54] extension. 36" 914 1010 48 f 18" [450] 24,000 [1071 12,000 [53] 12" [305) 2010 M 5,000 [22] x 4. Mini -excavators (<8,000lbs/3,628 kg) can be used with 18" [457) 1480 [71] (statc badsony} i� z- _ `I at least 12" (300 mm) of stone over the chambers and 24" [610] 1220 [56] 30"[7621 1060[51] Continue evenly backfilling between rows and around perimeter until Only after chambers have been backfilled to top of chamber and with are limited by the maximum ground pressures in Table 2 Initial embedment shall be spotted along the centerline of the chamber evenly No equipment shall be operated on the bed at this stage of the installation. embedment tone reaches tops of chambers an minimum 12" 3 rem a minimum 12" 3 0 rem of cover stone on to of chambers can skid based on a full bucket at maximum boom extension. ®Embedment 12" [300] NOTALLOWED NOTALLOWED 12" P051 1100 [53) NOTALLOWED anchoring the lower portion of the chamber. This is best accomplished with a Excavators must be located off the bed. Dump trucks shall not dump stone be s e sop c b s d a (00 (0 p U stone 18" [457) 715 [34] of cover stone is in place. Perimeter stone must extend horizontally to the loaders and small LGP dozers be used to final grade cover stone and 24"[610] 660[32] stone conveyor or excavator reaching along the row. directly on to the bed. Dozers or loaders are not allowed on the bed at this 5. StormTech does not require compaction of initial fill at excavation wall for both straight or sloped sidewalls. The recommended backfill material in accordance with ground pressure limits in Table 2. 30" 62 580 8 time. 18" (450 rent) of cover. However, requirements by others backfill methods are with a stone conveyor outside of the bed or build as you Equipment must push material parallel to rows only. Never push perpendicular 6"[150] NOTALLOWED NOTALLOW® NOTALLOWED NOTALLOWED NOTALLOWED fors" (15o rem) lifts pray necessitate the use of small go with an excavator inside the bed reaching along the rows. Backfilling while to rows. StormTech recommends the contractor inspect chamber rows before compactors at 18" (450 mm) of cover. assembling chambers rows as shown in the picture will help to ensure that placing final backfill. Any chambers damaged by construction equipment shall cn 6.Storageofmaterialssuchasconstructionmaterials, Table3-Placement Methods and Descriptions Backfill of Chambers - Embedment Stone equipment reach is not exceeded. be removed and replaced. equipment, spoils, etc. should not be located over the Storm Tech system. The use of equipment over 1 41 See Table 2 for Maximum Construction Loads Final Backfill of Chambers - Fill Material Inserta Tee Detail ,� F- E E the StormTech system not covered in Table 2 (ex. soil mixing equipment, cranes, etc) is limited. Please contact ®FlnalHit Avariety ofplacement methdsmay be 36"(900 mm) minimum Dozers to push parallel to Roller travel parallel to rows DO NOT INSTALL r � j U U INSERTA-TEEAT Storm Tech for more information. Material used. All construction bads must not cover required for dump rows.^ only untl36"(900mm) Y(300mm) N CHAMBER JOIWS exceed the maximum limn in Table 2, trucks to dump over compacted cover is MAx. ✓ A Q 7. Allowable track loads based on vehicle travel only. chambers. reached. - _-��rII ► Jy v Z3 � Excavators shall not operate on chamber beds until the © Initial Fill Excavator positioned off bed recommended. Asphat can be dumped into Small LGP tack dozers & skid Lise dynamic force of roller I ly r y j 1 ', LIAAnR CONVAL IAAY PIPE U U total backfill reaches 3 feet (900 ma) over the entire Material Small excavator allowed over paver when compacted loaders allowed to grade cover any after compacted fill _ . - $; `ST (PVC. ROPE. ETC.) clambers. Small dozer allowed. pavement subbase reaches crone with at least 12" (300 rem) depth roaches 24" (600 rem) I I I pA bed.fxcavators shall not operate on chamber beds until - E -b L 24" (600 rem) above tap of stone under tracks at all times. over chambers. Roller travel T t� I I ,T.. ,T•„r,,,,, the total backfill reaches 3 feet (900 mm) over the entire chambers. Equipment must push parallel parallel to chamber rows ony - _ Ills V bed• to rows at all times.INSERTA TEE I_ „ h .l . = I, I -I I1--=I A Imo_-„IJ=1I I-11 �n =1I I -I I h l=l n- _ - _ _ - -I rl ... - - - -I = _ III W-)� LI •1 '- ' _ CINeNECT ON ® Embedment No equipment allowed on bare chambers. No wheel bads allowed. No tracked equipment is No rollers allowed. �� Cal NSTA LEO CEN ERE Stone Use excavator a stone conveyor Material must be placed allowed on chambers until OVER CORRUGATION ADS "Terms and Conditions of Sale" are available on the ADS website, positioned off bed or on foundaion outside he limb of the a min. 12" (300 rem) cove PLACE ADS GEOSVNTHETICS 315 WOVEN UNEVEN BACKFILL EVEN BACKFILL PERIMETER NOT BACKFILLED PERIMETER FULLY BACKFILLED GEOTEXTRE(GENTEREDONINSERTA.TEE SEcrbNA.A Ew www.ads-pipe.com.AdvancedDrainage Systems, the ADS logo, and the stone toevenyflllaround all chambers chamber W. stone is in place, NLET)OVERBEDDINGSTONEFORSCONR aDEV to at least thet Of chamfers. PROTECTION AT SIDE INLET CONNECTIONS. green stripe are registered trademarks of Advanced Drainage Systems, op M1 GEOTEXTILEMUSTEXTENDW(,SO.) O ® Backfill chambers evenly. Stone column height should never differ by more Perimeter stone must be brought up evenly with chamber rows. Perimeter PAST CHAMBER FOOT C U,BE NA OIAMETEROF HEIGNTFROMBASEOF cV Inc. StormTech and the lsolator®Row are registered trademarks of ®Foundation No StormTech restictions.Contractor responsible for any amditionsor requirements byothers relative tosubgradebearing INBE-.E CHAMBER(%) CD O than 12" (300 mm) between adjacent chamber rows or between chamber must be fully backfflled, with stone extended horizontally to the excavation SC31O 4•(,Eomm) A•„SBmm) StormTech, Inc. Stone rapac ty, d watering a protection of subg aria. �j au N CV rows and perimeter. wall. J 8GT40 10"(-MM) 4RrWmm) y #10816 05/19(S OGTSO ro•(25omm) r0oomm) � 0 ,n W4150D 1Y(300mm) 4•(,5omm) 0 N L�J Install non -woven geotextile over stone. Geotextile must overlap 24" (600 mm) NOTE, MG45W 12•(3BD mm) rI-mm) ©2019Advanced Drainage Systems, Inc. PARTNUMSERSWILLVARYBASEDONINLETPIPEMATERIALS. NSERTATEEFITTINOSAVAILABLEFOR SOR26.SOP 3II.W.QIIS where edges meet. Compact at 24" (Boo rem) of fill. Roller travel parallel with rows. CONTACT STORMTEC„FOR MORE INFORMATION. GASKETEDB SOLVENT WELD, E412, HP STORM. CJIW OR DUCTILE IRON � O Call StormTech at 888.892.2894 for technical and product information or visit www.stormtech.com 6 Calf StormTech at 888.892.2894 for technical and product information or visit vvvvw.stormtech.com 3 4 > N G) • MW • • 111111117 MIR 18 H E ems= Q STOR ° e. Repeat this procedure on the opposite wall of the BAYFILTERT'" INSTALLATION MANUAL vault directly across from the first section. SA REINFORCED STEEL f. Bolt the 4 trolleys to the aluminum ]-beam as shown BMP E: ADS BAYFILTER W. �% WEIR PLATE B CONCRETE in the attached diagram. Make sure that the wheels - IQ r /' WEIR PLATE A Note: BayFilters are not recommended to be used as erosion STORMTECH CHAMBERS fh / TOP=410.00 for each trolley are mounted an equal distance from /%, TOP=409.50 control during site construction operations. BayFilters should the top of the] -beam. TOTAL AREA TREATED: /g,l l A7 remain offline or uninstalled until site stabilization has occurred. ,f/1 g. Lift the I-beam into place and insert the trolleys into // , r Please contact your local ADS or BaySaver representative if you the track. 3.39 AC (INCLUDES 0.78 %%�t l / WEIR A INV. 2. 5' should have any questions. ,4V/I 407.0 h. Using the supplied couplers, install the second Filter Tee Drain Down Module /// / T P= 409. AC DIRECT + 2.61 AC t1.01 �- WEIR GROUT TO 1. Contact utility locator to mark any nearby underground utilities sections of track via the same procedure. Continue //4 ,, - STIR. B1 5x4 g FROM BMPS A B & C) /f/1 / TOP=410.0 and make sure it is safe to excavate. until the track runs the length of the vault or as I ' 1 JUNCTION BOX)GROUT TO O ill / BOTTOM 2. Reference the site plan and stake out the location of the BayFilter designed. I /%, , - manhole/vault. Modular vault Assembly11.Install the PVC manifold. Glue all PVCjoints with the exception of w I A8 � /131 1 PP S ORM INV. 407.00 STIR. A8 (8x6 ., V. CONC. VAULT) 3. Excavate the hole, providing any sheeting and shoring necessary the BayFilter cartridge coupling. See Parts List drawing. - 8' x6' PRECAST %r� / O j 1 407.16 to comply with all federal, state and local safety regulations. 12. After the site has stabilized, remove any accumulated sediment or q / CONC. VAULT Ip� I 4'x5' REC ST CON -- 4. Level the subgrade to the proper elevation. Verify the elevation debris from the vault. / I against the manhole/vault dimensions, the invert elevations, and 13.InstalltheBayfilterVerticalDrainDownModules(VDDM)� W. BAYFILTERS lI JUNC ION OX INV. 402.83 I%� / STORAGE R W BOTTOM the site plans. Adjust the base aggregate, if necessary. _ to the manifold system (if applicable). � � ' � 1 q/I I L 5. Have the soil bearing capacity verified alicenseden engineer '" J'' !I' INV=407.0 INV. 402.83 g p Y Y g 14. Install a row of flow disks and the BayFilter cartridges. Place each Flow Disk Filter Placement �1 I the required load bearing capacity. On solid subgrade, set the first ti, cartridge so the handle points across the vault. Make sure the air section of the BayFilter manhole/vault. f valve is on the side closer to the outlet. l/I/I / 6. Check the level and elevation of the first section to ensure it is 15.Place one full set of one Hold Down Bar and two Retainer Brackets r' I I%%�l / I 2 WEIR PLATE A �C B DETAILS T correct before adding any riser sections. = into place. Mark and drill two 5/8" holes for each bracket. After • I/I - %1 / ISO ATO ROW \vl 7. If additional section(s) are required, add a watertight seal to the fully anchoring Retainer Brackets, place the left end of the Hold ' � 4// �� / / 11 1 first section of the BayFilter manhole/vault. Set additional Down Bar in position. Slide right end into bracket and secure with �' I N = 40 00 7 SCALE: 1 =20 / 1 section(s) of the manhole/vault, adding a watertight seal to each U-Bolt. I 40 /' V joint. 16. Repeat steps 14 and 15 for each set of BayFilter Cartridges and 8. Install the outlet pipe in BayFilter manhole/vault. Hold Down Bar until the whole system is installed. See Parts List_ 9. Install the inlet pipe to the BayFilter manhole vault. drawing for Hold Down Bar placement. y �/ 0 LF 6" 0 W p p Y / Vault End Section Hold Down Bar Chain Hoist System 1 H U LE 40 II v 10. Install the trolley system (if applicable). Tool List and Bracket %/'' PRF. PVC L L a. Attach the mounting brackets to the track./UNDERDRAIN PVC glue and primer I I %/I � I - / NEW PU IC SW b. Each track is split in sections. The length and number of / 1 405.50 Crane/lifting mechanism to lower the cartridges in the I/I FACILITY ESMT RIM 414.21 % sections vary depending on the vault. It is generally better to %/� I / vault (each co nutdweighs orFem350Ibslers 59)) I/1 /-0 S NE BE DING start installing longer track sections first. Hold a section in ® l� � STANDARD STAIR Screwdriver or nut driver for Fernco couplers %/ / / 81. x 20. 420 PROP (RAF)F place and align the top of the brackets with the ceiling of the Hammer and soft blow hammer r /r' REINFORCED STEEL 5.0' vault. Mark the center of the hole in each bracket and remove l OTT = 404. 0 WEIR PLATE B 24" SPUTTER TO C Saw (in case PVC Sch 40 piping length needs to be adjusted) J ' I / INV. G the track. I I/�f OP= 13.00 TOP=410.00 7•2' ISOLATOR ROW Hammer drill 1, c. Using a hammer drill and 3/a" (6 rem) bit, drill a hole o I/r , 2/d' (6 rem) and 5/8" (16 rem) concrete drill bit f�/I / 409.73 INV. OUT 407.16 415 approximately 3" (76 mm) deep at each mark. /j� , /UJ • 3/a' (19 mm) wrench BayFilter Vault Overview Vault Internal Assembly I - - INV. ° n it 413.00 TOP STONE LL d. Hold the track back in place and realign the brackets %�' / 407.19 15" INV. IN 407.00 with the holes. Place a plastic spacer block behind y For more information lease see the Ba Saver ) ill I INV. m P BaySaver 409.73 C1 INV. 1 5 1-YR WSE 406.49 W each bracket and using the supplied 3/a" (6 rem) x 33/a" � , / (83 mm) anchor bolts mount the track in place. Only website at www.baysaver.com I /4/I / 408.00 410 10-YR WSE�409.73 \ install one section of track at this stage. or contact 1-800-229-7283. 25-YR WSE�411.48 V Trolley System 11W _ 48" H-1 �`-� 4 7 0) CHAMBER INV.' - %` _ Q 18' INV. IN 407.00---_-_-�.--- - -- - - . - -- - -- - - - - -- - I . rT\ 405 I ^h 18" SPUTTER TO 404.50 BOTTOM STONE ADVANCEDTHE MOST NAME IN WATER MANAGEMENT SOLURONST' Advanced Drainage , , , , C2 STORAGE ROW JUNCTION BOX 6" SCHEDULE 40 Date ° THE MOST ADVANCED NAME IN WATER MANAGEMENT SOLUTIONSTI OUT PERFORATED PVC - T e ADS 10 and the Green stripe are registemd trademarks of Advanced Drainage SyStems, Inc. :Ir : - INV. 407.00 40 INV.=405.50 I E00 10+50 11+00 0 9 2 3 2 019 V LT Scale BMP E PLAN: ADS BAY» LTER W. STORMTECH 3 STRUCTURE B SPUTTER DETAIL 4 BMP PROFILE: ADS STORMTECH Sheet No. C 1 7 SCALE: 1"=20' C 1 7 SCALE: 1"=20' C 1 7 SCALE: 1"=20' C17 OF19 File No. IL 16.009 ISOLATOR ROW STEP BY STEP MAINTENANCE PROCEDURES - STEP 1 Inspect Isolator Row for sediment. THE ISOLATOR"' ROW - -_ ISOLATOR ROW A) Inspection ports (if present) -�+ ` INSPECTION/MAINTENANCE i. Remove lid from floor box frame ii. Remove cap from inspection riser INTRODUCTION INSPECTION iii. Using a flashlight and stadia rod,measure depth of sediment and record results on maintenance log. An important component of an Stormwater Pollution Prevention p p Y L.: ' The frequency of inspection and maintenance varies by location. A iv. If sediment is at or above 3 inch depth, proceed to Step 2. If not, proceed to Step 3. Plan is inspection and maintenance. The StormTech Isolator Row routine inspection schedule needs to be established for each individual B) All Isolator Rows i. Remove cover from manhole at upstream end of Isolator Row Sl patented technique to inexpensively enhance Total Suspended Solids (TSS) removal and provide easy access for inspection and location based upon site specific variables. The type of land use (i.e. .. industrial, commercial, residential), anticipated pollutant load, percent ii. Using a flashlight, inspect down Isolator Row through outlet pipe maintenance. imperviousness, climate, etc. all play a critical role in determining the 1. Mirrors on poles or cameras may be used to avoid a confined space entry camerasconfined actual frequency of inspection and maintenance practices. 2. Follow OSHA regulations confined space anti if enteringmanhole g p Y iii. If sediment is at or above the lower row of sidewall holes (approximately 3 inches), proceed to Step 2. THE ISOLATOR ROW At a minimum, StormTech recommends annual inspections. Initially, If not, proceed to Step 3. The Isolator Row is a row of StormTech chambers, either SC-160LP, the Isolator Row should be inspected every 6 months for the first year SC-310, SC-310-3, SC-740, DC-780, MC-3500 or MC-4500 models, of operation. For subsequent years, the inspection should be adjusted STEP 2 Looking down the Isolator Row from the that is surrounded with filter fabric and connected to a closely located a I in v it manhole opening, woven eotezt a is shown P 9, 9 based upon previous observation of sediment deposition. Clean out Isolator Row using the JetVac process. 9 P manhole for easyaccess. The fabric -wrapped chambers provide for pp p between the chamber and stone hale. The Isolator Row incorporates a combination of standard manhole(s) and strategically located inspection ports A) A fixed floor cleaning nozzle with rear facing nozzle spread of 45 inches or more is preferable settling and filtration of sediment as storm water rises in the Isolator (as needed). The inspection ports allow for easy access to the system from the surface, eliminating the need to B) Apply multiple passes of JetVac until backflush water is clean Row and ultimately passes through the filter fabric. The open bottom perform a confined space entry for inspection purposes. C) Vacuum manhole sump as required chambers and perforated sidewalls (SC-310, SC- 310-3 and SC-740 models) allow storm water to flow both vertically and horizontally out of - If upon visual inspection it is found that sediment has accumulated, a stadia rod should be inserted to STEP 3 the chambers. Sediments are captured in the Isolator Row protecting determine the depth of sediment. When the average depth of sediment exceeds 3 inches throughout the length the storage areas of the adjacent stone and chambers from sediment of the Isolator Row, clean -out should be performed. Replace all caps, lids and covers, record observations and actions. accumulation. ' Two different fabrics are used for the Isolator Row. A woven eotextile MAINTENANCE The Isolator Row was designed to reduce the cost of periodic maintenance. By "isolating" sediments to just STEP 4 Inspect &clean catch basins and manholes upstream of the StormTech system. fabric is placed between the stone and the Isolator Row chambers. I one row, costs are dramatically reduced by eliminating the need to clean out each row of the entire storage The tough geotextile provides a media for storm water filtration and provides a durable surface for maintenance operations. It is also I "" w,a•' bed. If inspection indicates the potential need for maintenance, access is provided via a manhole(s) located on +) eJ 2 +J A) designed to prevent scour of the underlying stone and remain intact r���- - the end(s) of the row for cleanout. If entry into the manhole is required, please follow local and OSHA rules for a during high pressure jetting. A non -woven fabric is placed over the confined space entries. chambers to provide a filter media for flows passing through the Maintenance is accomplished with the JetVac process. The JetVac process utilizes a high pressure water perforations in the sidewall of the chamber. The non -woven fabric is nozzle to propel itself down the Isolator Row while scouring and suspending sediments. As the nozzle is --- not required over the DC-780, MC-3500 or MC-4500 models as these StormTech Isolator Row with retrieved, the captured pollutants are flushed back into the manhole for vacuuming. Most sewer and pipe chambers do not have perforated side walls. Overflow Spillway (not to scale) maintenance companies have vacuum/JetVac combination vehicles. Selection of an appropriate JetVac nozzle a The Isolator Row is typically designed to capture the "first flush" and will improve maintenance efficiency. Fixed nozzles designed for culverts or large diameter pipe cleaning are oRE TREATMENT offers the versatility to be sized volume basis flow rate basis. PRE-TREATMENT preferable. Rear facing jets with an effective spread of at least 45" are best. Most JetVac reels have 400 feet r i An upstream manhole not only provides access to the Isolator Row but the of hose allowing maintenance of an Isolator Row up to 50 chambers long. The JetVac process shall only typically includes a high flow weir such that storm water flowrates or ISOLATOR �souTOR Row be performed on StormTech Isolator Rows that have AASHTO class 1 woven eotextile ass specified b p g ( P Y StormTech) over their angular base stone. SAMPLE MAINTENANCE LOG volumes that exceed the capacity of the Isolator now overtop the over flow weir and discharge through a manifold to the other chambers. _ -' StormTech Isolator Row (not to scale) The Isolator Row may also be art of a treatment train. B treating MANHOLE H / \ ' Y P Y 9 o��ow � Note: Non -woven fabric is only required over the inlet pipe connection into the end cap for DC-780, MC-3500 and MC-4500 chamber models storm water prior to entry into the chamber system, the service life can WEIR and is notrequired over the entire Isolator Row. be extended and pollutants such as hydrocarbons can be captured. Pre-treatment best management practices can be as simple as °sYmm�� deep sump catch basins, oil -water separators or can be innovative'"""°F EOCENmIC 1. "", `atz"r• • t x �K t'�•+. f �'+F . storm water treatment devices. The design of the treatment train and HEADER selection of pretreatment devices by the design engineer is often driven by regulatory requirements. Whether pretreatment is used or not, r' the Isolator Row is recommended by StormTech as an effective means • „,� o . o cq to minimize maintenance requirements and maintenance costs. Note: See the StormTech Design Manual for detailed information on OPTIONAL��wE,�° designing inlets for StormTechs system, thelsolatorRow. Access sTORMECHCHAMBERS �,�mm"�"EW"E°"ems°,•a.�,� ;,;m;M„°;� 9 9 Y g a��mm�"�E.�E�P���°°� E°.��� .•„gym,"�"�"�,e.s�,� BAYFILTER'm INSPECTION AND MAINTENANCE MANUAL The BayFilter system requires periodic maintenance to continue operating at the design efficiency. The maintenance process is comprised of the removal and replacement of each BayFilter cartridge, vertical drain down module; and the cleaning of the vault or manhole with a vacuum truck. The maintenance cycle of the BayFilter system will be driven mostly by the actual solids load on the filter. The system should be periodically monitored to be certain it is operating correctly. Since stormwater solids loads can be variable, it is possible that the maintenance cycle could be more or less than the projected duration. BayFilter systems in volume -based applications are designed to treat the WQv in 24 to 48 hours initially. Late in the operational cycle of the BayFilter, the flow rate will diminish as a result of occlusion. When the drain down exceeds the regulated standard, maintenance should be performed. When a BayFilter system is first installed, it is recommended that it be inspected every six (6) months. When the filter system exhibits flows below design levels the system should be maintained. Filter cartridge replacement should also be considered when sediment levels are at or above the level of the manifold system. Please contact the BaySaver Technologies Engineering Department for maintenance cycle estimations or assistance at 1.800.229.7283. BayFilter System Cleanout Vactor Truck Maintenance Jet Vectoring Through Access Hatch Maintenance Procedures 1. Contact BaySaver Technologies for replacement filter cartridge pricing and availability at 1-800-229-7283. 2. Remove the manhole covers and open all access hatches. 3. Before entering the system make sure the air is safe per OSHA Standards or use a breathing apparatus. Use low 02, high CO, or other applicable warning devices per regulatory requirements. 4. Using a vacuum truck remove any liquid and sediments that can be removed prior to entry. 5. Remove the hold down bars. Using a small lift or the boom of the vacuum truck, remove used cartridges by lifting them out. 6. Any cartridges that cannot be readily lifted can be easily slid along the floor or moved using the trolley system (if installed) to a location they can be lifted via a boom lift. 7. When all the cartridges have been removed, it is now practical to remove the balance of the solids and water. Loosen the stainless clamps on the Fernco couplings for the manifold and remove the drain pipes as well. Carefully cap the manifold and the Ferncos and rinse the floor, washing away the balance of any remaining collected solids. 8. Clean the manifold pipes, inspect, and reinstall. 9. Install the exchange cartridges, reinstall the hold down bars and close all covers. 10. The used cartridges may be sent back to BaySaver Technologies for recycling. For more information please see the BaySaver website at www.baysaver.com or contact 1-800-229-7283. ..Ab Manifold Tee View of a Cleaned System Cartridge Hoist Point I Stadia Rod Readings I Depth Observations/Actions 3/15/11 6,3 fE NONe New LKSEALLa6Loh, FLxed poLKE is CS frame ok DOM grade 9/24/11 6.2 0.1 f E Some grLE f eLE SM 6/20/13 518' 0.6 f! Mucky7 feet, debris visible LK mahkote and Lk Nd 1so2or Row, maG1EeKoKce due 7/7/13 6.3 fE 0 S stem jeEEed and vacuumed DOM `'�T 0 r U JU N M. SHTMP > icc. No. 445183 I -V 6.6. Filter Media and Surface Cover • The Filter Media should contain 3% to 501c organic matter by conventional Walkley-Black soil organic matter • Cation Exchange Capacity (CEC). The relative ability of soils to hold and retain nutrient cations like Ca and K is 8.2 Bioretention Installation 8.3 Construction Inspection determination method or similar analysis. Soil organic matter is expressed on a dry weight basis and does not include referred to as cation exchange capacity or CEC and is measured as the total amount of positively charged cations that The falter media and surface cover are the two most important elements of a bioretention facility in terms of long-term coarse particulate (visible) components. a soil can hold per unit dry mass. CEC is also used as an index of overall soil reactivity and is commonly expressed in The following is a typical construction sequence to properly install a bioretention basin. The installation of a bioretention Inspections during and immediately after construction are needed to ensure that all the elements of bioretention basins are performance. The ultimate performance goals of the combination of engineered soil mix and surface cover (plants) is to milliequivalents per 100 grams (meq/100g) of soil or cmol'/kg (equal values). A soil with a moderate to high CEC basin will include intermediate inspections at critical stages of construction with inspector sign -off that the particular built in accordance with these specifications. Use a detailed inspection checklist that requires sign -offs by qualified maintain a design infiltration rate and soil permeability so as to treat the stormwater runoff to remove phosphorus P and g P Y P P () • The overall particle size distribution of the mix will vary since the sand fraction may contain some finer sizes as will indicates a greater ability to capture and retain positively charged contaminants, which encourages conditions to remove. elements of the bioretention are constructed according the approved plans and specifications. As an alternative if allowed g pp p p individuals at critical stages of construction and to ensure that the contractor's interpretation of the plan is consistent with g rp p s other nutrients and contaminants during a wide range of stone intensities and volumes. native topsoils if utilized. As stated previously, the goal of the mixture is to achieve the desired constant head P P Y g phosphorus, assuming that soil fines (particularly fine silts and clays) are at least partially responsible for CEC. The by the VSMP Authority, the contractor may rely on the engineer of record or other qualified individual to conduct the the designer's intent. The following identifies the critical stages of construction where an intermediate inspection and permeability. Therefore, the filter media composition noted above serves as the target recipe for the three ingredients, minimum CEC of a bioretention soil media mix for pollutant removal is 5.0 me /100 or cmol'/k or greater. The P ( 4 g g) g intermediate inspections and certifications of compliance. The construction sequence for micro-bioretention is more P P qY sign -off b a qualified individual is recommended since the items can't be verified after construction is completed. A q P Some important definitions to help designers, contractors and material suppliers achieve these goals include: P P g � PP g while the ultimate performance goal is to achieve a verified soil permeability or hydraulic conductivity (Ksat) of 1 to 2 filter media CEC should be determined by the Unbuffered Salt, Ammonium Acetate, Summation of Cations or Effective simplified. These steps may be modified to reflect different bioretention applications or expected site conditions: p p y pp p construction inspection checklist that includes certifications of inspection at critical stages is provided at the end of this p p g inches per hour (or 30 to 60 cm/day). CEC techniques (Sumner and Miller, 1996) or similar methods that do not utilize strongly acidic extracting solutions. specification. Soil infiltration: the rate at which stormwater enters the surface of the soil. Infiltration is influenced by soil structure, Step 1. Construction of the bioretention area may only begin after the entire contributing drainage area has been stabilized compaction/bulk density, organic matter, moisture content, and other physical characteristics at the soil surface. The design • The following ing is the recommended composition of the three media ingredients: Coatings of Fe- and Al -oxides on mineral soil surfaces are also responsible for significant P retention and may be present with vegetation. It may be necessary to block certain curb or other inlets while the bioretention area is being constructed. The following represents items that are frequently overlooked during construction inspection but represent important infiltration rate is usually expressed as a constant value, but the actual infiltration rate can vary due to differences in depth in soils with low CEC. Thus, it is important for filter media P removal efficiency that some amount of mineral fines The proposed site should be checked for existing utilities prior to any excavation. elements for ensuring the success of the bioretention facility during the initial break-in period. of ponding (hydraulic head) or other surface and subsurface soil conditions during the receiving event. Initial rates of o Sand shall consist of silica based coarse aggregate, angular or round in shape and meet the mixture grain size (10% - 20%) be present as long as the texture and permeability specifications cited herein are met. This is important • Verify the proper coverage and depth of mulch, vegetation, or soil matting has been achieved following construction, infiltration into dry surface soils can be quite rapid and then will decrease as the soil wets and/or swells. Assuming constant distribution below. No substitutions of alternate materials such as diabase, calcium carbonate, rock dust or due to the fact that soil organic matter per se is not active in adsorption of P. Step 2. The designer and the installer should have a preconstruction meeting, checking the boundaries of the contributing both on the filter bed and the side -slopes. head conditions, the infiltration rate will equilibrate after some period of time to approach and reflect the internal dolomitic sands are accepted. In particular, mica can make up no more than 5% of the total sand fraction. The drainage area and the actual inlet elevations to ensure they conform to original design. Since other contractors may be • Inspect the re -treatment forba s and filter strips to verify that the are properly installed, stabilized, and working P P YY Y P P Y g permeability see below of the underlying soil mix as described below. P Y( ) Y g sand fraction may also contain a limited amount of articles > 2.0 mm and < 9.5 min per the table below, but Y P P The CEC of the soil is determined in art b the amount of clay and/or humus or organic matter resent. Since the P Y Y g P responsible for constructing portions of the site, it is quite common to find subtle differences in site grading, drainage and P g P q g g> g effectively before opening the facility to runoff. the overall sand fraction must meet the specification of >75% being coarse or very coarse sand. bioretention media is a coarse mineral texture, and since the added organic matter may not have the relatively high CEC paving elevations that can produce hydraulically important differences for the proposed bioretention area. The designer • Check that outfall protection/energy dissipation measures at concentrated inflow and outflow points are stable. Soil media permeability: the rate at which percolating stormwater flows through the soil after it has infiltrated. P Y� P g � o Topsoil is generally defined as the combination of the other ingredients referenced in the bioretention soil P g Y gr' of native humus, it may be difficult to achieve the ideal CEC for the mixture as a whole in fresh) blended materials. Y Y should clear) communicate, in writing, an project changes determined during the reconstruction meeting to the installer Y g Y P jg P g media: sand, fines (silt and clay), and any associated soil organic matter. Since the objective of the specification However, it is expected that over time, natural accumulation of organic matter will improve soil reactivity. Therefore, and the plan review/inspection authority. Upon final acceptance of the facility, to the practice's GPS coordinates and submit them for entry into the VSMP P P y' g P Y NOTE: Infiltration and Permeability are used interchangeably in many reference materials but refer to is to carefully establish the proper blend of these ingredients, the designer (or contractor or materials supplier) the initial media mixture may require additional suitable organic matter to increase the CEC to the extent possible Authority's BMP maintenance tracking database. two different h sical processes. physical P must careful) select the topsoil source material in order to not exceed the amount of an one ingredient. Y P Y �' without over) compromising the filter media composition or elevating the available P. Y P g P g Ste 3. Temporary E&S controls are needed during construction of the bioretention area to divert stormwater away from P P arY g Y General) the use of a topsoil defined as a loam sand sand loam or loam (per the USDA Textural Triangle) y' P Y Y (P • Filter Media Permeability.- bioretention soil media should have a minimum infiltration rate of 1 to 2 inches per uy P the bioretention area until it is completed. Special protection measures such as erosion control fabrics may be needed to P P P Y The infiltration and permeability of a given soil are related to the hydraulic conductivity of the soil (K). The rate at which will of an acceptable ingredient and in combination with the other ingredients meet the overall performance hour (or 30 to 60 cm/day). Note: a proper soil mix will have an initial infiltration rate that is significantly higher. protect vulnerable side slopes from erosion during the construction process. water enters the soil (infiltration), under optimal conditions, starts very fast and then declines and eventually approaches a goal of the soil media. • Depth. The standard minimum filter bed depth ranges from 24 and 36 inches for Level 1 and Level 2 designs, constant rate of entry. This constant rate of infiltration is sometimes called the soil'spermeability,but is technical) defined �' Y respectively, (18 to 24 inches for rain gardens or micro-bioretention). If trees are included in the bioretention planting Ste 4. An re -treatment cells should be excavated fast and then sealed to trap sediments. P Y P P as the saturated hydraulic conductivity (Ksat) when it equals or approaches the internal permeability of the underlying soil o Organic matter materials used in the soil media mix should consist of well -decomposed natural C-containing plan, tree planting holes in the filter bed must be at least 4 feet deep to provide enough soil volume for the root structure medium. In almost all cases, reference to an infiltration rate implies this long-term constant rate (permeability or Ksat; organic materials such as eat moss humus compost consistent with the material specifications found in g P , P ( P of mature trees. Use turf, perennials or shrubs instead of trees to landscape shallower filter beds. Step S. Excavators or backhoes should work from the sides to excavate the bioretention area to its appropriate design depth Jarrett, 2008). For the purpose of bioretention and other engineered media system design, it is reasonable to assume that the Design Specification #4 Compost Soil Amendments), pine bark fines or other organic soil conditioning • Filter Media or Tree PlantingAreas. A more organic filter media is recommended within the planting holes for trees P g and dimensions. Excavating equipment should have scoops with adequate reach so they do not have to sit inside the footprint soil media should infiltrate the stornwater at a rate equal to the long -tern Ksat of the underlying soil media mix. material. However, per above, the combined soil mix should contain 3% to 5% soil organic matter on dry weight with a ratio of 50% sand, 30%oposoil and 20% acceptable leaf compost. of the bioretention area. Contractors should use a cell construction approach in larger bioretention basins, whereby the basin design is basis (grams organic matter per 100 grams dry soil) by the Walkley-Black method or other similar analytical technique. • Mulch. A 2 to 3 inch layer of mulch on the surface of the filter bed enhances )ant survival suppresses weed growth, Y P PP gr is split into 500 to 1,000 sq. ft. temporary cells with a 10-15 foot earth bridge in between, so that cells can be excavated Therefore, the goal of the soil media to provide a mixture that has a porosity that will maintain the desired and re -treats runoff before it reaches the filter media. Shredded aged hardwood bark mulch makes a very good surface P g rY from the side. while also providing limited soil fines and sufficient organic matter to support plant growth and adsorb P and permeability, P g S PP P other stonnwater contaminants. It is expected that over time, the seasonal cycle of )ant growth within the bioretention P Y P �' It may be advisable to start with an open -graded coarse sand material and proportionately mix in the topsoil materials cover, as it retains a significant amount of nitrogen and typically will not float away. g g YP YSte 6. It may be necessary to rip the bottom soils to a depth of 6 to 12 inches to promote eater infiltration. P Y az1' P P P greater basin will lead to an adequate accumulation of organic matter to maintain plant growth. The challenge, therefore, is to that may contain anywhere from 10% to 30% soil fines (sandy loam, loamy sand, loam) to achieve the desired ratio of • Alternative to Mulch Cover. In some situations, designers may consider alternative surface covers such as turf, native provide enough organic matter within the initial soil media mix to support the initial seasons of plant establishment and sand and fines. Sufficient suitable organic amendments can then be added to achieve the 3% to 5% soil organic matter groundcover, erosion control matting (coir or jute matting), river stone, or pea gravel. The decision regarding the type Step 7. Place geotextile fabric on the sides of the bioretention area with a 6-inch overlap on the sides. If a stone storage layer growth, while not overloading the system with excessive nutrients or soil fines from the organic matter or topsoil) which grg y ( g p ) target. The exact composition of organic matter and topsoil material will vary, making the exact article size distribution g P of surface cover to use should be based on function, cost and maintenance. Stone or gravel are not recommended in will be used, place the appropriate depth of #57 stone on the bottom, install the perforated underdrain pipe, pack #57 stone might cause leaching of nutrients or gradual clogging of the soil porosity. It is also expected that the organic matter will of the final total soil media mixture difficult to define in advance of evaluating available materials. g parking lot applications, since they increase soil temperature and have low water holding capacity. to 3 inches above the underdrain pipe, and add approximately 3 inches of choker stone/pea gravel as a filter between the enhance aggregation/structure of the media mix over time to aid in maintenance of permeability. • Media for Turf Cover. One adaptation is to design the filter media primarily as a sand filter with organic content only underdrain and the soil media layer. If no stone storage layer is used, start with 6 inches of #57 stone on the bottom, and • Available Soil Phosphorus (P). Plant -available soil P should be within the range of Low' (L') to Medium (M) as at the top. Leaf compost tilled into the top layers will provide organic content for the vegetative cover. If grass is the proceed with the layering as described above. Soil porosity is the fraction of a volume of soil material that is not solid, also referred to as the void space. As the volume defined in Table 2.2 of DCR (2005) Virginia Nutrient Management Standards and Criteria. For the Mehlich I only vegetation, the ratio of compost may be reduced. of fines, defined as either clay particles (less than 2 microns, or 0.002 mm) or silt particles (between 2 and 50 microns, or extraction procedure this equates to a range of 5 to 15 mglkg P or 18 to 40 mglkg P for the Mehlich III procedure. Step 8. Obtain soil the media from a qualified vendor, and store it on an adjacent impervious area or plastic sheeting. After 0.002 and 0.05 min) within a given soil mix is increased, there is a possibility that those fines may be flushed or migrate verifying that the media meets the specifications, apply the media in 12-inch lifts until the desired top elevation of the downward through the soil mix with each runoff event and eventually fill or otherwise clog the void space randomly The filter media should contain sufficient plant available P to support initial plant establishment and plant growth, but bioretention area is achieved. Wait a few days to check for settlement, and add additional media, as needed, to achieve the throughout the mix and create preferential flow paths. In the short term this can lead to short circuiting and reduced not serve as a significant source of P for long tern leaching. The media must also be relatively loose and non -compacted design elevation. volume reduction and pollutant removal, and in the long tern may clog the soil layer. This tendency is offset by addition to allow for adequate inter -connected porosity to meet the required permeability (Ksat) specification. Saxton et al. and maintenance of appropriate amounts of soil organic matter which binds soil fines into larger non -mobile aggregates. (1986) estimated generalized bulk densities and soil -water characteristics from soil texture assumptions. The expected Step 9. Prepare planting holes for any trees and shrubs, install the vegetation, and water accordingly. Install any temporary bulk density of the loamy sand soil composition described above should be in the range of 1.6 to 1.7 g/crn . irrigation. • General Filter Media Physical Composition. The mineral soil texture of the bioretention soil mix should be loamy coarse sand with no more than 10% clay, no more than 20% silt + clay and at least 75% of the sand fraction should be Step 10. Place the surface cover in both cells (mulch, river stone or turf), depending on the design. If coir or jute matting coarse or very coarse sand. will be used in lieu of mulch, the matting will need to be installed prior to planting (Step 9), and holes or slits will have to be cut in the matting to install the plants. • To allow for appropriate Cation Exchange Capacity (CEC) and nutrient removal, the mix should contain at least 10% soil f nes (silt + clay) while meeting the overall texture specification above. The particle size analysis must be conducted Step 11. Install the plant materials as shown in the landscaping plan, and water them during weeks of no rain for the first on the mineral fraction only or following appropriate treatments to remove organic matter before particle size analysis. two months. 9.2. First Year Maintenance Operations Successful establishment of bioretention areas requires that the following tasks be undertaken in the first year following installation: • Initial inspections. For the first 6 months following construction, the site should be inspected at least twice after storm events that exceed 1/2 inch of rainfall. • Spot Reseeding. Inspectors should look for bare or eroding areas in the contributing drainage area or around the bioretention area, and make sure they are immediately stabilized with grass cover. • Fertilization. One-time, spot fertilization may be needed for initial plantings. • Watering. Watering is needed once a week during the first 2 months, and then as needed during first growing season (April -October), depending on rainfall. • Remove and replace dead plants. Since up to 10% of the plant stock may die off in the first year, construction contracts should include a care and replacement warranty to ensure that vegetation is properly established and survives during the first growing season following construction. The typical thresholds below which replacement is required are 85% survival of plant material and 100% survival of trees. 9.3. Maintenance Inspections It is highly recommended that a spring maintenance inspection and cleanup be conducted at each bioretention area. The following is a list of some of the key maintenance problems to look for: • Check to see if 75% to 90% cover (mulch plus vegetative cover) has been achieved in the bed, and measure the depth of the remaining mulch. • Check for sediment buildup at curb cuts, gravel diaphragms or pavement edges that prevents flow from getting into the bed, and check for other signs of bypassing. • Check for any winter- or salt -killed vegetation, and replace it with hardier species. • Note presence of accumulated sand, sediment and trash in the pre-treatment cell or filter beds, and remove it. • Inspect bioretention side slopes and grass filter strips for evidence of any rill or gully erosion, and repair it. • Check the bioretention bed for evidence of mulch flotation, excessive ponding, dead plants or concentrated flows, and take appropriate remedial action. • Check inflow points for clogging, and remove any sediment. • Look for any bare soil or sediment sources in the contributing drainage area, and stabilize them immediately. • Check for clogged or slow -draining soil media, a crust formed on the top layer, inappropriate soil media, or other causes of insufficient filtering time, and restore proper filtration characteristics. Example maintenance inspection checklists for Bioretention areas can be accessed in Appendix C of Chapter 9 of the Virginia Stormwater Management Handbook (2010). 9.4. Routine and Non -Routine Maintenance Tasks Maintenance of bioretention areas should be integrated into routine landscape maintenance tasks. If landscaping contractors will be expected to perform maintenance, their contracts should contain specifics on unique bioretention landscaping needs, such as maintaining elevation differences needed for ponding, proper mulching, sediment and trash removal, and limited use of fertilizers and pesticides. A customized maintenance schedule must be prepared for each bioretention facility, since the maintenance tasks will differ depending on the scale of bioretention, the landscaping template chosen, and the type of surface cover. A generalized summary of common maintenance tasks and their frequency is provided in Table 9.8. The most common non -routine maintenance problem involves standing water. If water remains on the surface for more than 48 hours after a storm, adjustments to the grading may be needed or underdrain repairs may be needed. The surface of the filter bed should also be checked for accumulated sediment or a fine crust that builds up after the first several storm events. There are several methods that can be used to rehabilitate the filter (try the easiest things first, as listed below): • Open the underdrain observation well or cleanout and pour in water to verify that the underdrains are functioning and not clogged or otherwise in need of repair. The purpose of this check is to see if there is standing water all the way down through the soil. If there is standing water on top, but not in the underdrain, then there is a clogged soil layer. If the underdrain and stand pipe indicates standing water, then the underdrain must be clogged and will need to be snaked. • Remove accumulated sediment and till 2 to 3 inches of sand into the upper 8 to 12 inches of soil. • Install sand wicks from 3 inches below the surface to the underdrain layer. Sand wicks can be installed by excavating or augering (using a tree auger or similar tool) down to the gravel storage zone to create vertical columns which are then filled with a clean open -graded coarse sand material (coarse sand mix similar to the gradation used for the soil media). A sufficient number of wick drains of sufficient dimension should be installed to meet the design dewatering time for the facility. • Last resort - remove and replace some or all of the soil media. Table 9.8. Suggested Annual Maintenance Activities for Bioretention Maintenance Tasks Frequency • Mowing of grass filter strips and bioretention turf cover At least 4 times a year • Spot weeding, erosion repair, trash removal, and mulch Twice during growing raking season • Add reinforcement planting to maintain desired the vegetation density As needed • Remove invasive plants using recommended control methods • Stabilize the contributing drainage area to prevent erosion • Spring inspection and cleanup • Supplement mulch to maintain a 3 inch layer Annually • Prune trees and shrubs • Remove sediment in re -treatment cells and inflow points Once every 2 to 3 years • Replace the mulch layer Every 3 years T L f M7 flN M. SHIMP > �Ic- No. 45183