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DocuSign Envelope ID: 72E7BD50- E5C5- 4BEA- B4AA- FCA907469BF8
<br />�l
<br />001
<br />P
<br />SCALE: 1" = 10' -0"
<br />10 5 0 10 20
<br />NOTES:
<br />�SCM ACCESS
<br />AND MAINTENANCE
<br />EASEMENT
<br />� 4 / 1
<br />BI ❑RETENTI ❑N CC
<br />1 UNTIL THE SITE HAS BEEN FULLY STABILIZED NO
<br />UNTREATED RUNOFF SHALL ENTER THE
<br />BI❑- RETENTI ❑N BASIN AFTER IT HAS BEEN
<br />CONSTRUCTED ALL BI❑- RETENTI ❑N AREAS SHALL BE
<br />KEPT FREE AND CLEAR FROM ST❑RMWATER AND
<br />ST❑RMWATER RUNOFF DURING SITE C❑NSTRUCTI ❑N
<br />AND THE ACTUAL C❑NSTRUCTI ❑N OF THE
<br />BI❑- RETENTI ❑N ITSELF, STRICT MEASURES SHALL BE
<br />IMPLEMENTED TO ENSURE THAT NO SEDIMENT LADEN
<br />ST❑RMWATER ENTERS THE BI❑- RETENTI ❑N BASIN
<br />AFTER C❑NSTRUCTI ❑N WITH ❑UT PROPER TREATMENT
<br />IMPR ❑PER DISCHARGING ❑F SEDIMENT INTO THE
<br />BASIN BEFORE THE SITE HAS BEEN FULLY
<br />STABILIZED COULD RESULT IN A FAILURE OF THE
<br />SYSTEM, WHICH WOULD REQUIRE REINSTALLATI ❑N
<br />2 SPECIAL CARE SHALL BE EXERCISED TO ENSURE
<br />THAT AFTER PLANTING AND SODDING HAS OCCURRED,
<br />THAT THE CLEAN ❑UT CAPS ARE VISIBLE AND
<br />APPROXIMATELY 8" ABOVE THE FLOOR OF THE
<br />BI❑ORETENTI ❑N AREA
<br />3 THE SEASONAL HIGH WATER TABLE ELEVATI ❑N
<br />SHALL BE A MINIMUM ❑F 2' BELOW THE BOTTOM ❑F
<br />ALL BI❑- RETENTI ❑N DEVICES IF 2' CANNOT BE
<br />MAINTAINED, A LINER WILL BE REQUIRED
<br />4 CONTRACTOR SHALL BE RESPONSIBLE FOR
<br />ENSURING THAT THE SURFACE AREA AND THE
<br />STORAGE VOLUME FOR THE BI❑- RETENTI ❑N BASIN
<br />MEET OR EXCEED THOSE ON THE APPROVED
<br />C❑NSTRUCTI ❑N DRAWINGS
<br />5 PRI ❑R TO INSTALLATI ❑N, PLANTING MEDIA SHAL
<br />BE TESTED ON SITE AND APPROVED BY THE
<br />ENGINEER
<br />6 CONTRACTOR SHALL BE RESPONSIBLE FOR
<br />PROVIDING PURCHASE ORDERS AND TESTING REPORTS
<br />FOR THE MATERIALS DETAILED IN THE CROSS
<br />SECTI ❑N
<br />7 MEDIA SHALL BE INSTALLED AND TESTED ❑N SITE
<br />USING AN INFILTR ❑METER FOR INFILTRATI ❑N RATES
<br />PRI ❑R TO PLACEMENT OF ANY SURFACE ELEMENTS
<br />UJ�U) L__
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<br />PVC ELBOW o C)
<br />w — TO OF SURFACE
<br />BIOCELL 1 STRUCTURE #1 X � 04 C #1 616,00'
<br /># DROP INLET. <
<br />RIM ELEV: 617.00 RIM ELEV: 617.00
<br />ELBOW IN
<br />1= —SHEET FLOW �__ --- - _ - - - -- -- _ CELL #1: 614.50'
<br />I u.
<br />PLANTING j \�/ PLANTING =>
<br />GEOTEXTj- � SOIL ;vii SOIL w BOTTOM OF
<br />FABRIC ll �'����� \, "� w PLANTING SOIL
<br />------- - - - - -- - - - - - -- \- �''� � CELL #1: 613 , 0 0'
<br />OUTLET {BEYON^) { EYOND)
<br />PIPE
<br />ljii
<br />���, `x=12" W S
<br />1 WASHED �� GRAVEL 57
<br />GR L No. 57 IN -SITU
<br />MATE 4" PERFO TED PVC
<br />BIORETENTI AREA. DRAIN W OFABRIC
<br />WIDTH AND GTH VARIES. SLEEVE % SLOPE
<br />SEE BIORETE N DATA TABLE (CONNEC 0
<br />NI A -A TI-I I I(,N npnp INII FT STORM S EM)
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<br />IN -SITU
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<br />INLET STRUCTURE
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<br />W@ MIDPOINT OF
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<br />PLAN
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<br />BIORETENTION AREA
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<br />TS TO 6" ABOVE
<br />SURFA
<br />SECTION B —B
<br />THROUGH BIO— RETENTI
<br />ARE
<br />RETENTION CELL #1
<br />N.T.S. 0000 /MISC DETAILS /BIO -CH- HILL - NLET- CENTERE OUT.DWG
<br />ED ELEV,
<br />@ C,Li
<br />C? BIOCELL #1 NOT IN CONTRACT I`J
<br />8 SPECIAL CARE SHALL BE TAKEN TO ENSURE THAT
<br />MEDIA IS NOT COMPACTED DURING INSTALLATI ❑N
<br />9, A CERTIFICATI ❑N ❑F MEDIA C ❑MP❑SITI ❑N MEETING
<br />THE ABOVE CRITERIA SHALL BE PROVIDED BY THE
<br />CONTRACTOR TO THE ENGINEER PRI ❑R TO
<br />PLACEMENT
<br />10 HYDRAULIC CONDUCTIVITY FOR THE SOIL MEDIA
<br />SHALL BE 1 " -6" PER HOUR, HOWEVER 1" -2" IS
<br />OPTIMAL
<br />11 BI❑- RETENTI ❑N BASIN SHALL DRAIN BELOW THE
<br />SURFACE WITHIN 12 HOURS AND TO A LEVEL ❑F 24"
<br />BELOW THE SURFACE WITHIN 48 HOURS
<br />12 FOR ALL DESIGN REQUIREMENTS, REFER TO
<br />RELEVANT SECTI ❑NS OF THE NCDEQ ST❑RMWATER
<br />MANUAL
<br />*SURFACE ELEVATION OF BIORETENTION
<br />BASIN TO BE SODDED WITH A HYBRID
<br />BERMUDA OR CENTIPEDE GROWN ON
<br />PERMEABLE SOILS (DO NOT USE SOD GROWN
<br />ON PREDOMINANTLY CLAY SOILS).
<br />GENREAL NOTES:
<br />-30" MIN S❑IL MEDIA CONSISTENT ❑F
<br />- 75 -85% ASTM C -33 SAND
<br />-8 -10% FINES (SILTS & CLAYS)
<br />-5 -10% ORGANICS /PEAT MOSS
<br />-P INDEX LESS THAN 30 SHALL BE PROVIDED
<br />O
<br />9
<br />1
<br />62 .5
<br />ft-
<br />PVC ELBOW
<br />BIOCELL #2 STRUCTURE #3
<br />RIM ELEV: 619.25 DROP INLET.
<br />RIM ELEV: 619.25
<br />�„ , �, SHEET FLOW
<br />I � -
<br />111 VAiVA VA'�A /VA�VA /VA
<br />3 W41 W*W41 (WIC LE4NOUT
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<br />6 214,
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<br />°�U)
<br />0 W W
<br />O 0 U
<br />a_ w Z TOP OF SURFACE
<br />< CELL #2; 618.25'
<br />ELBOW IN
<br />CELL #2: 616.75'
<br />E
<br />222 cloister court
<br />chapel hill, nc 27514
<br />919.401.8586
<br />www.cro- ae.com
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<br />no. revisions
<br />TRC SUBMITTAL
<br />10/23/17
<br />NDTE� TRC SUBMITTAL
<br />11/20/17
<br />3�1 MAX GRADE TRC SUBMITTAL
<br />7 12/18/17
<br />BI ❑RETENTI ❑N CELL #2
<br />0
<br />(n Z W W
<br />z =
<br />LIMIT OF bi 0 z 3" MIN. BERMUDA
<br />of
<br />PAVEMENT w X � N SOD
<br />0 Q Q —
<br />Tom , - ri -i -i i , i ,/ . ,.. ,. ,,.., • , lir Z Q � l_T�
<br />--PLANTING- PLANTING I � Z
<br />GEOTEXTILE SOIL SOIL ep w BOTTOM OF
<br />FABRIC `'��_, '� w PLANTING S ❑IL
<br />\`�'`-- - - - - -- U� CELL #2; 615.25' 1' x 1' MIN.
<br />OUTLET {BEYOND) ( EYOND) #57 OR #67
<br />PIPE
<br />' .. WASHED I 12" GRAVEL VERGE
<br />12" WASHED GRAVEL NO. 57
<br />GRAVEL NO. 57 IN -SITU
<br />MATERIAL 4" PERFORATED PVC
<br />BIORETENTION AREA. DRAIN W /GEOFABRIC
<br />WIDTH AND LENGTH VARIES. im— SLEEVE @ 1% SLOPE
<br />SEE BIORETENTION DATA TABLE (CONNECT TO
<br />STORM SYSTEM)
<br />SECTION A —A THROUGH DROP INLET
<br />2 BIORETENTION CELL #2
<br />C3. SCALE: N.T.S.
<br />N x-3.0 MIN. 3:
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<br />GRASS -11 II_ // � ����������� � �\ 3:1 MAX.
<br />BUFFER A�i j \/ z � (TYPICAL)
<br />i VA p
<br />PLANTING SOIL- -
<br />TITLE
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<br />+ (iAET PI n
<br />-- -- - ~ -- 4 "- PERFORATED PVC DRAIN
<br />W /GEOFABRIC SLEEVE 0 1%
<br />SLOPE(CONNECT
<br />TO STORM SYSTEM. TURN
<br />IN -SITU UP INTO INLET STRUCTURE
<br />J
<br />N N a LO MATERIAL W/ ELBOW ® MIDPOINT OF
<br />< It z PLANTING SOIL)
<br />- BIORETENTION AREA-I CLEANOUTS TO 6" ABOVE
<br />SURFACE
<br />SECTION B —B THROUGH B10— RETENTION AREA
<br />0000 /11VIISC DETAILS /BIO -CH- HILL - NLET - CENTRED -INV O)dT.DWG
<br />drawn checked
<br />ETS MLH
<br />BIORETENTION CELL
<br />DETAILS
<br />sheet
<br />C3m3
<br />date project no.
<br />12/15/2017 1613
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<br />I 4, 4 4,
<br />6 214,
<br />1P
<br />°�U)
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<br />O 0 U
<br />a_ w Z TOP OF SURFACE
<br />< CELL #2; 618.25'
<br />ELBOW IN
<br />CELL #2: 616.75'
<br />E
<br />222 cloister court
<br />chapel hill, nc 27514
<br />919.401.8586
<br />www.cro- ae.com
<br />pr
<br />z
<br />� O
<br />Z o
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<br />OcnH
<br />no. revisions
<br />TRC SUBMITTAL
<br />10/23/17
<br />NDTE� TRC SUBMITTAL
<br />11/20/17
<br />3�1 MAX GRADE TRC SUBMITTAL
<br />7 12/18/17
<br />BI ❑RETENTI ❑N CELL #2
<br />0
<br />(n Z W W
<br />z =
<br />LIMIT OF bi 0 z 3" MIN. BERMUDA
<br />of
<br />PAVEMENT w X � N SOD
<br />0 Q Q —
<br />Tom , - ri -i -i i , i ,/ . ,.. ,. ,,.., • , lir Z Q � l_T�
<br />--PLANTING- PLANTING I � Z
<br />GEOTEXTILE SOIL SOIL ep w BOTTOM OF
<br />FABRIC `'��_, '� w PLANTING S ❑IL
<br />\`�'`-- - - - - -- U� CELL #2; 615.25' 1' x 1' MIN.
<br />OUTLET {BEYOND) ( EYOND) #57 OR #67
<br />PIPE
<br />' .. WASHED I 12" GRAVEL VERGE
<br />12" WASHED GRAVEL NO. 57
<br />GRAVEL NO. 57 IN -SITU
<br />MATERIAL 4" PERFORATED PVC
<br />BIORETENTION AREA. DRAIN W /GEOFABRIC
<br />WIDTH AND LENGTH VARIES. im— SLEEVE @ 1% SLOPE
<br />SEE BIORETENTION DATA TABLE (CONNECT TO
<br />STORM SYSTEM)
<br />SECTION A —A THROUGH DROP INLET
<br />2 BIORETENTION CELL #2
<br />C3. SCALE: N.T.S.
<br />N x-3.0 MIN. 3:
<br />_ j
<br />GRASS -11 II_ // � ����������� � �\ 3:1 MAX.
<br />BUFFER A�i j \/ z � (TYPICAL)
<br />i VA p
<br />PLANTING SOIL- -
<br />TITLE
<br />FABR ( n W
<br />+ (iAET PI n
<br />-- -- - ~ -- 4 "- PERFORATED PVC DRAIN
<br />W /GEOFABRIC SLEEVE 0 1%
<br />SLOPE(CONNECT
<br />TO STORM SYSTEM. TURN
<br />IN -SITU UP INTO INLET STRUCTURE
<br />J
<br />N N a LO MATERIAL W/ ELBOW ® MIDPOINT OF
<br />< It z PLANTING SOIL)
<br />- BIORETENTION AREA-I CLEANOUTS TO 6" ABOVE
<br />SURFACE
<br />SECTION B —B THROUGH B10— RETENTION AREA
<br />0000 /11VIISC DETAILS /BIO -CH- HILL - NLET - CENTRED -INV O)dT.DWG
<br />drawn checked
<br />ETS MLH
<br />BIORETENTION CELL
<br />DETAILS
<br />sheet
<br />C3m3
<br />date project no.
<br />12/15/2017 1613
<br />
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