SW3210601_Plansheet - SCM Detail_20210908

CONSTRUCTION GUIDELINES FOR SAND FILTRATION BASIN
Amicus Partners, PLLC
Firm License # P-1191
30 Union Street South
Concord, NC 28025
Civil Site Design
Low Impact Development
Small —Scale Building Design
Telephone: [phone]
Facsimile: 704.248.7951
Seals:
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5(,AKI h Y ICU I I UM A MINIMUM REFERENCES: MANUAL OF STORMWATER BEST MANAGEMENT PRACTICES; NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
" "' OF 3—FEET AASHTO M278 FOR PVC PIPE,OR BE 3/8—INCH IN TOWN OF HUNTERSVILLE WATEROUALITY DESIGN MANUAL (JUNE 2013 EDITION)
`""""""' ••• CHARLOTTE-MECKLENBURG BMP DESIGN MANUAL (REVISED JULY 2013)
�� 4B DIAMETER SPACED 3 INCHES ON CENTER ALONG ADMINISTRATION MANUAL FOR IMPLEMENTATION OF THE POST-CONSTRUCTIONSTORMWATERORDINANCE(REVISEDJUNE2013)
TYPICAL SECTION 4 LONGITUDINAL ROWS THAT ARE SPACED 90° APART.
NOT TO SCALE THE PIPES SHALL HAVE A MINIMUM SLOPE OF 0.5%. SAND FILTER MAINTENANCE TA5K5 AND 5CHEDULE
I I I I I I I I I I I I 1 11 11" IIA' Vil r I ODD I
LENGTH = 40.00 FT
SLOPE = 0.7%
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VERTICAL GRAPHIC SCALE (PROFILE VIEW)
1 INCH = 10 FEET I
10 0 5 10 20 i
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GRAPHIC SCALE (PLAN VIEW)
30 0 15 30 60
SPECIFICATION/TEST METHOD
SIZE
NOTES
MATERIAL
Sand substitutions such as Diabase and
Graystone #10 are not acceptable. No
ASTM-C-33 concrete sand
0.02" to 0.04"
calcium or dolomitic sand substitutions are
Sand
acceptable. No "rock dust" can be used for
sand.
Ash content < 15%,
The material must be reed -sedge humic peat,
pH range: 5.2 to 4.9,
n/a
shredded, uncompacted, uniform and clean.
Loose bulk density
(For open and sand filter only).
Peat
Underlain Gravel
blue stone, double washed, #57 stone
0.5" to 1.5"
4" min. over underdrain and max of 12" total
Must maintain 125 gpm/ft^2 flow rate. Note: a
0.08" thick
Geotextile Fabric
MIRAFI 140 OR EQUAL
4" pea gravel layer may be substituted for
equivalent opening
(if required)
geotextiles meant to "separate" sand filter
size of #80 sieve
layers.
ASTM-D-4833 (Thickness)
ASTM-D-412 (Tensile strength 1,100 lb,
Impermeable Liner
p
elongation 200 percent)
Liner to be ultraviolet -resistant. A geotextile
30 mil thickness
fabric should be used to protect the liner from
ASTM-D-624 (tear resistance - 150 Win)
puncture.
ASTM-D-471 (water absorption: +8 to 2%
mass)
Min. 6" perforated Scheduled 40
3/8" pert. @ 3" O/C along 4 longitudinal rows that are
Underlain Piping
AASHTO-M-278 (PVC)
or stronger PVC or double
spaced 90 degrees apart. Pipes shall have a min. slope
AASHTO-M-252 (HDPE)
wall HDPE
of 0% and max spacing of 10' O.C.
On -site testing of poured -in -place concrete
required: 28-day strength and slump test; all
Concrete (cast-in-
Fe=3,500 psi, normal weight,
concrete design (cast -in -place or pre -cast) not
place)
air -entrained, reinforced to meet ASTM-615-69
n/a
using previously approved state or local
standards requires design drawings sealed
and approved by a licensed, professional
structural engineer.
Concrete (pre -cast)
Per pre -cast concrete manafacturer
n/a
Non-rebar steel
ASTM A-36
n/a
TASK
SCHEDULE
INSPECT BANKS AND SURROUNDING DRAINAGE AREAS
FOR EROSION AND STABILIZE IF NECESSARY
MONTHLY
STREET SWEEP PARKING LOT
QUARTERLY
TRASH REMOVAL
MONTHLY
INSPECT OUTLET FOR OBSTRUCTIONS
MONTHLY
INSPECT FOR CLOGGING
MONTHLY
INSPECT INLET GRATES
MONTHLY
SKIM SAND MEDIA
YEARLY
PUMP OIL AND GRIT FROM
SEDIMENTATION CHAMBER
YEARLY OR AT 50% FULL
REPLACE SAND MEDIA
AS NEEDED (EXPECT 3 YEARS)
GRA55ED SAND FILTER
MOW BASIN TO RECOMMENDED HEIGHT IN
ALTERNATING PATTERNS TO PREVENT COMPACTION
AND PREVENT WEED GROWTH. BAG CLIPPINGS TO
PREVENT THATCH BUILT-UP.
WEEKLY TO BI-WEEKLY DURING THE GROWIN
SEASON, AS NEEDED OTHER SEASONS
LIGHT FERTILIZING TO ESTABLISH HEALTHY ROOTS
ONLY DURING THE FIRST 2 YEARS
AERATE AND DETHATCH BASIN FLOOR
EVERY 2 YEARS
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„ a #5 REBAR MAT @ 12" ON CENTER
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°� IN EACH DIRECTION
�' SINGLE 6" ORIFICE
lilil fffoyollELEVATION ® CENTER OF ORIFICE = 811.59—FT LAN AND
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, CONCRETE PIPE
LEAVING THE RISER
I w ,,, � ����� ���� �° uw„".. . ..x MUST BE 0—RING PIPE
DETAILS
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HARD PIPE TO UNDERDRAIN w , " Sheet No:
TRASH RACK NOTES: ---
COLLECTION SYSTEM
EACH TRASH RACK IS TO BE CONSTRUCTED OF #3 REBAR, MUST BE i `` 5' X 5' X 1.0'
GALVANIZED PRIOR TO FINAL ASSEMBLY. OPENINGS ARE TO BE NO MORE 3,500 PSI CONCRETE SPREAD FOOTING
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THAN 6" SQUARE. THE ORIFICE TRASH RACKS ARE TO BE ASSEMBLED
WITH (2) REBAR MATS CONSISTING OF #5 REBAR
IN ONE PIECE, AND THE TOP TRASH RACK IS TO BE ASSEMBLED IN 4 12" ON CENTER IN EACH DIRECTION
COPYRIGHT © 2019 AMICUS PARTNERS, PLLC. SEPARATE PIECES AND BOLTED NOT WELDED FOR FINAL ASSEMBLY.
ALL RIGHTS RESERVED. REPRODUCTION OR USE OF THE CONTENTS ( ) TOP VIEW � RISER STRUCTURE DETAIL
Doc MIENT,CINMWHOLE OR IINENT, OR IPART, WITHOUTOR nWRITTEN COONS TO INSENT ADJACENTEPROPERTIES, PROPERTY DIMENSIONS, IONS, ANDTICOORDON RINATES RETHIS OFERENC PERTY D FROM AND TRASH RACK SHALL HAVE A HINGED PANEL FOR WORKER ACCESS. 5'2 SCALE: N.T.S.
ALL PARCEL AND BOUNDARY (SEE ABOVE DETAIL)
OF AMICUS PARTNERS, IS STRICTLY PROHIBITED. ONLY
COPIES FROM THE ORIGINAL OF THIS DOCUMENT, AS APPROVED BY CABARRUS COUNTY GIS.
THE ENGINEER SHALL BE CONSIDERED TO BE VAUD, TRUE COPIES.
'ANAN
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