SW1220701_Plansheet - Misc. Detail_20220805 (5)

ONSITE CONCRETE WASHOUT
STRUCTURE WITH LINER
10'-0" MIN.
A
O O O O
SANDBAGS (TYP.)
OR STAPLES
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10 MIL
1:1 PLASTIC
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SANDBAGS (TYP.)
SIDE SLOPE LINING OR STAPLES
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(TYP.)
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CLEARLY MARKED SIGNAGE
SECTION A -A
CONCRETE NOTING DEVICE (18"X24" MIN.)
WASHOUT
NOTES:
1. ACTUAL LOCATION DETERMINED IN FIELD
2. THE CONCRETE WASHOUT STRUCTURES SHALL BE
MAINTAINED WHEN THE LIQUID AND/OR SOLID REACHES
75% OF THE STRUCTURES CAPACITY.
PLAN
3.CONCRETE WASHOUT STRUCTURE NEEDS TO BE
CLEARY MARKED WITH SIGNAGE NOTING DEVICE.
BELOW GRADE WASHOUT
STRUCTURE
NOT TO SCALE
HIGH 10'-0" IN.
SANDBAGS (TYP.)
COHESIVE & B
OR STAPLES
LOW FILTRATION
HIGH
SOIL BERM
O O O O
10 MIL COHESIVE &
PLASTIC LINING LOW FILTRATION
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(TMPIj E SLOPE SOIL BERM
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SECTION B-B
6"
B
SANDBAGS TYP.)
NOTES:
OR STAPLE
1. ACTUAL LOCATION DETERMINED IN FIELD
CLEARLY MARKED SIGNAGE
2. THE CONCRETE WASHOUT STRUCTURES
CONCRETE NOTING DEVICE (18"X24" MIN.)
SHALL BE MAINTAINED WHEN THE LIQUID
WASHOUT
AND/OR SOLID REACHES 75% OF THE
STRUCTURES CAPACITY TO PROVIDE
ADEQUATE HOLDING CAPACITY WITH A
MINIMUM 12 INCHES OF FREEBOARD.
PLAN
&CONCRETE WASHOUT STRUCTURE NEEDS
TO BE CLEARY MARKED WITH SIGNAGE
NOTING DEVICE.
ABOVE GRADE WASHOUT STRUCTURE
NOT TO SCALE
CONCRETE WASHOUT
PART III
SELF -INSPECTION, RECORDKEEPING AND REPORTING
SECTION A: SELF -INSPECTION
Self -inspections are required during normal business hours in accordance with the table
below. When adverse weather or site conditions would cause the safety of the inspection
personnel to be in jeopardy, the inspection may be delayed until the next business day on
which it is safe to perform the inspection. In addition, when a storm event of equal to or
greater than 1.0 inch occurs outside of normal business hours, the self -inspection shall be
performed upon the commencement of the next business day. Any time when inspections
were delayed shall be noted in the Inspection Record.
Frequency
Inspect
(during normal
Inspection records must include:
business hours)
(1) Rain gauge
Daily
Daily rainfall amounts.
maintained in
If no daily rain gauge observations are made during weekend or
good working
holiday periods, and no individual -day rainfall information is
order
available, record the cumulative rain measurement for those un-
attended days (anc this will determine if a site inspection is
needed). Days on which no rainfall occurred shall be recorded as
"zero." The permittee may use another rain -monitoring device
approved by the Division.
(2) E&SC
At least once per
1. Identification of the measures inspected,
Measures
7 calendar days
2. Date and time of the inspection,
and within 24
3. Name of the person performing the inspection,
hours of a rain
4. Indication of whether the measures were operating
event > 1.0 inch in
properly,
24 hours
5. Description of maintenance needs for the measure,
6. Description, evidence, and date of corrective actions taken.
(3) Stormwater
At least once per
1. Identification of the discharge outfalls inspected,
discharge
7 calendar days
2. Date and time of the inspection,
outfalls (SDCs)
and within 24
3. Name of the person performing the inspection,
hours of a rain
4. Evidence of indicators of stormwater pollution such as oil
event > 1.0 inch in
sheen, floating or suspended solids or discoloration,
24 hours
5. Indication of visible sediment leaving the site,
6. Description, evidence, and date of corrective actions taken.
(4) Perimeter of
At least once per
If visible sedimentation is found outside site limits, then a record
site
7 calendar days
of the following shall be made:
and within 24
1. Actions taken to clean up or stabilize the sediment that has left
hours of a rain
the site limits,
event > 1.0 inch in
2. Description, evidence, and date of corrective actions taken, and
24 hours
3. An explanation as to the actions taken to control future
releases.
(I Streams or
At least once P5 er
If the stream or wetland has increased visible sedimentation or a
wetlands onsite
7 calendar days
stream has visible increased turbidity from the construction
or offsite
and within 24
activity, then a record of the following shall be made:
(where
hours of a rain
1. Description, evidence and date of corrective actions taken, and
accessible)
event > 1.0 inch in
2. Records of the required reports to the appropriate Division
24 hours
Regional Office per Part III, Section C, Item (2)(a) of this permit.
(6) Ground
After each phase
1. The phase of grading (installation of perimeter E&SC
stabilization
of grading
measures, clearing and grubbing, installation of storm
measures
drainage facilities, completion of all land -disturbing
activity, construction or redevelopment, permanent
ground cover).
2. Documentation that the required ground stabilization
measures have been provided within the required
timeframe or an assurance that they will be provided as
soon as possible.
NOTE: The rain inspection resets the required 7 calendar day inspection requirement.
GREEN HIGH -FLOW
GRAY HIGH -EFFICIENCY
®
POCKET
�FILLEDROCK FOT.ROCK
PRY
PURCHASER.
ISOMETRIC
VIEW
SHOWN WITH ROADWAY PROJECTS
FILTER HAT
5.5" CENTER
DRAINAGE HOLE
62.25"
12 DRAINAGE
48 DRAINAGE
SLOTS AROU
PERIMETER
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PLAN VIEW
3.25" SLOT WIDTH
@ WIDE END
1.625"
27.5" 19,,
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2.0" SLOT WIDTH
@ NARROW END
ELEVATION VIEW
REPLACEMENT FILTERS: MODEL # S-240
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FILTER OPTIONS
FILTER HAT IS AVAILABLE IN THREE OPTIONS:
1) ALL HIGH -FLOW MATERIAL
2) ALL HIGH -EFFICIENCY MATERIAL
3) HIGH -FLOW MATERIAL ON TOP HALF OF HAT, HIGH -EFFICIENCY
MATERIAL ON BOTTOM HALF (THIS FILTER COVER IS RECOMMENDED
FOR ALL ROADWAY PROJECTS.)
IT IS THE PURCHASERS RESPONSIBILITY TO PURCHASE APPROPRIATE
FILTER HAT. PURCHASER SHALL PROVIDE ROCK FOR FILTER POCKETS
FILTER HAT INSTALLATION
FILTER HAT SLIDES DIRECTLY OVER FILTER FRAME. TO KEEP FILTER
FRAME IN PLACE OVER STORM STRUCTURE, ROCK POCKETS ARE
SEWN DIRECTLY INTO FILTER HAT MATERIAL. EVERY FILTER HAT
COMES IN ONE PIECE FOR EASY INSTALLATION.
MAINTENANCE
ALL TEMPORARY EROSION, SEDIMENTATION, & POLLUTION CONTROL
PRACTICES SHOULD BE INSPECTED DAILY. CONTRACTOR SHALL
REMOVE SEDIMENT AND DISPOSE OF IN A PROPER MANNER. INSPECT
S-200A DAILY FOR CUTS, ABRASIONS, AND PROPER INSTALLATION.
REPLACE OR REPOSITION AS NECESSARY.
SPECIFICATIONS
FILTER FABRIC SILT -SAVER HAT SHALL BE BASED ON DESIGN
PROFESSIONAL'S SPECIFICATIONS.
HEAD -3.0'
2.5'
1.0'
0.5
0.0'
FRAME & FILTER DISCHARGE ANALYSIS
HEAD (FT) EQUATION OPENING FRAME FILTER FILTERED
USED AREA (SF) FLOW (CFS) AREA (SF) FLOW (CFS)
0.5 0 2.1 7 6 2
1.0 0 3.9 19 12 3
1.5 0 7.0 41 1 18 5
2.0 0 8.0 54 24 7
2.5 0 9.2 70 30 9
3.0 0 9.2 77 - 77
DUE TO NARROW SLOT, A TRANSITION WILL OCCUR BETWEEN WEIR
AND ORIFICE CONDITIONS. ORIFICE FLOW WILL PROVIDEA MORE
CONSERVATIVE ESTIMATE OF FLOW, THEREFORE THE LESSER OF THE
ORIFICE AND WEIR FLOWS WILL BE USED FOR EACH STAGE
CALCULATION.
FILTER MATERIALALLOWS 129 gpm/SF OR 0.29cfs/SF
ORIFICE EQUATION (0) = Q=0.6A(2gh)^0.5
P = FEET PERIMETER
h = HEAD IN FEET
Q = CAPACITY IN cfs
A = FREE OPEN AREA OF FRAME
g = 32.2 FEET-PER-SECOND/SECOND
SQUARE FRAME & FILTER ASSEMBLY
Model # S-200A
FILTER FABRIC MATERIAL: REFER
SILT -SAVER, INC. 1094 CULPEPPER DRIVE, CONYERS, GA 30094 PHONE: [phone] FAX: [phone] TOLL FREE: 1-888-382-SILT (7458) www.siltsaver.com
NOT TO SCALE SILT SAVER DETAIL (TYPE D)
PART III
SELF -INSPECTION, RECORDKEEPING AND REPORTING
SECTION B: RECORDKEEPING
1. E&SC Plan Documentation
The approved E&SC plan as well as any approved deviation shall be kept on the site. The
approved E&SC plan must be kept up-to-date throughout the coverage under this permit.
The following items pertaining to the E&SC plan shall be kept on site and available for
inspection at all times during normal business hours.
Item to Document
Documentation Requirements
(a) Each E&SC measure has been installed
Initial and date each E&SC measure on a copy
and does not significantly deviate from the
of the approved E&SC plan or complete, date
locations, dimensions and relative elewtions
and sign an inspection report that lists each
shown on the approved E&SC plan.
E&SC measure shown on the approved E&SC
plan. This documentation is required upon the
initial installation of the E&SC measures or if
the E&SC measures are modified after initial
installation.
(b) A phase of grading has been completed.
Initial and date a copy of the approved E&SC
plan or complete, date and sign an inspection
report to indicate completion of the
construction phase.
(c) Ground cover is located and installed
Initial and date a copy of the approved E&SC
in accordance with the approved E&SC
plan or complete, date and sign an inspection
plan.
report to indicate compliance with approved
ground cover specifications.
(d) The maintenance and repair
Complete, date and sign an inspection report.
requirements for all E&SC measures
have been performed.
(e) Corrective actions have been taken
Initial and date a copy of the approved E&SC
to E&SC measures.
plan or complete, date and sign an inspection
report to indicate the completion of the
corrective action.
2. Additional Documentation to be Kept on Site
In addition to the E&SC plan documents above, the following items shall be kept on the
site and available for inspectors at all times during normal business hours, unless the
Division provides a site -specific exemption based on unique site conditions that make
this requirement not practical:
(a) This General Permit as well as the Certificate of Coverage, after it is received.
(b) Records of inspections made during the previous twelve months. The permittee shall
record the required observations on the Inspection Record Form provided by the
Division or a similar inspection form that includes all the required elements. Use of
electronically -available records in lieu of the required paper copies will be allowed if
shown to provide equal access and utility as the hard -copy records.
3. Documentation to be Retained for Three Years
All data used to complete the a-NOI and all inspection records shall be maintained for a period
of three years after project completion and made available upon request. [40 CFR 122.41]
PART II, SECTION G, ITEM (4)
DRAW DOWN OF SEDIMENT BASINS FOR MAINTENANCE OR CLOSE OUT
Sediment basins and traps that receive runoff from drainage areas of one acre or more shall use outlet structures that withdraw water from the surface when these devices need to be drawn down
for maintenance or close out unless this is infeasible. The circumstances in which it is not feasible to withdraw water from the surface shall be rare (for example, times with extended cold weather).
Non -surface withdrawals from sediment basins shall be allowed only when all of the following criteria have been met:
(a) The E&SC plan authority has been provided with documentation of the non -surface withdrawal and the specific time periods or conditions in which it will occur. The non -surface withdrawal
shall not commence until the E&SC plan authority has approved these items,
(b) The non -surface withdrawal has been reported as an anticipated bypass in accordance with Part III, Section C, Item (2)(c) and (d) of this permit,
(c) Dewatering discharges are treated with controls to minimize discharges of pollutants from stormwater that is removed from the sediment basin. Examples of appropriate controls include
properly sited, designed and maintained dewatering tanks, weir tanks, and filtration systems,
(d) Vegetated, upland areas of the sites or a properly designed stone pad is used to the extent feasible at the outlet of the dewatering treatment devices described in Item (c) above,
(e) Velocity dissipation devices such as check dams, sediment traps, and riprap are provided at the discharge points of all dewatering devices, and
(f) Sediment removed from the dewatering treatment devices described in Item (c) above is disposed of in a manner that does not cause deposition of sediment into waters of the United States.
PART III
SELF -INSPECTION, RECORDKEEPING AND REPORTING
SECTION C: REPORTING
1. Occurrences that Must be Reported
Permittees shall report the following occurrences:
(a) Visible sediment deposition in a stream or wetland.
(b) Oil spills if:
They are 25 gallons or more,
They are less than 25 gallons but cannot be cleaned up within 24 hours,
• They cause sheen on surface waters (regardless of volume), or
They are within 100 feet of surface waters (regardless of volume).
(c) Releases of hazardous substances in excess of reportable quantities under Section 311
of the Clean Water Act (Ref: 40 CFR 110.3 and 40 CFR 117.3) or Section 102 of CERCLA
(Ref: 40 CFR 302.4) or G.S. 143-215.85.
(d) Anticipated bypasses and unanticipated bypasses.
(e) Noncompliance with the conditions of this permit that may endanger health or the
environment.
2. Reporting Timeframes and Other Requirements
After a permittee becomes aware of an occurrence that must be reported, he shall contact
the appropriate Division regional office within the timeframes and in accordance with the
other requirements listed below. Occurrences outside normal business hours may also be
reported to the Department's Environmental Emergency Center personnel at (800)
858-0368.
Occurrence
Reporting Timeframes (After Discovery) and Other Requirements
a Visible sediment
()
Within 24 r an al or electronic notification.
W t hours, or
deposition in a
e Within 7 calendar days, a report that contains a description of the
stream or wetland
sediment and actions taken to address the cause of the deposition.
Division staff may waive the requirement for a written report on a
case -by -case basis.
• If the stream is named on the NC 303(d) list as impaired for sediment -
related causes, the permittee may be required to perform additional
monitoring, inspections or apply more stringent practices if staff
determine that additional requirements are needed to assure compliance
with the federal or state impaired -waters conditions.
(b) Oil spills and
• Within 24 hours, an oral or electronic notification. The notification
release of
shall include information about the date, time, nature, volume and
hazardous
location of the spill or release.
substances per Item
1(b)-(c) above
(c) Anticipated
A report at least ten days before the date of the bypass, if possible.
bypasses [40 CFR
The report shall include an evaluation of the anticipated quality and
122.41(m)(3)]
effect of the bypass.
(d) Unanticipated
. Within 24 hours, an oral or electronic notification.
bypasses [40 CFR
Within 7 calendardays, a report that includes an evaluation of the
122.41(m)(3)]
quality and effect of the bypass.
(e) Noncompliance
Within 24 hours, an oral or electronic notification.
with the conditions
Within 7calendardays, a report that contains a description of the
of this permit that
noncompliance, and its causes; the period of noncompliance,
may endanger
including exact dates and times, and if the noncompliance has not
health or the
been corrected, the anticipated time noncompliance is expected to
environment[40
continue; and steps taken or planned to reduce, eliminate, and
CFR 122.41(I)(7)]
prevent reoccurrence of the noncompliance. [40 CFR 122.41(I)(6).
• Division staff may waive the requirement for a written report on a
case -by -case basis.
NCGO1 SELF -INSPECTION, RECORDKEEPING AND REPORTING
NORTH CAROLINA
d, Environmental Quality
EFFECTIVE: 04/01 / 19
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CONTRACTOR MAY BE
REQUIRED TO ADJUST INSIDE
ROW OF SILT FENCE TO
ACHIEVE FINAL GRADES
DOUBLE ROW SILT FENCE LAYOUT
WOVE
STEEL POST (1.33#/FT. MIN.)
WIRE FENCING
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FILTER FABRIC
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ANCHOR SKIRT 12" MINIMUM
(SEE NOTE 9)
NOT TO SCALE
INSTALL SILT FENCE CHECKS (TIE
BACKS) EVERY 50-100 FEET,
DEPENDENT ON SLOPE, ALONG SILT
FENCE THAT IS NOT INSTALLED WITH
SLOPE AND WHERE CONCENTRATED
FLOWS ARE EXPECTED OR ARE
DOCUMENTED ALONG THE PROPOSED
SILT FENCE.
GENERAL NOTES:
1. FILTER FABRIC FENCE SHALL BE A MINIMUM OF 32" IN WIDTH AND SHALL HAVE A MINIMUM OF 6 LINE WIRES WITH 12"
STAY SPACING.
2. WOVEN FILTER FABRIC BE USED WHERE SILT FENCE IS TO REMAIN FOR A PERIOD OF MORE THAN 30 DAYS.
3. STEEL POSTS SHALL BE 5'-0" IN HEIGHT AND BE OF THE SELF -FASTENER ANGLE STEEL TYPE.
4. WIRE FENCING SHALL BE AT LEAST #10 GAGE WITH A MINIMUM OF 6 LINE WIRES WITH 12" STAY SPACING.
5. TURN SILT FENCE UP SLOPE AT ENDS.
6. WIRE MESH SHALL BE MIN. 13 GAGE WITH MAXIMUM 12" OPENINGS.
7. WIRE AND WASHED STONE WILL BE REQUIRED AND NOTED ON PLANS WHEN:
A. AT TOE OF SLOPES GREATER THAN 10 FEET VERTICAL
(2:1 SLOPE)
NOT TO SCALE B. AT DENUDED LIMITS WHERE AN UNDISTURBED BUFFER IS 50 FEET
OR LESS AWAY.
8. THE FENCE SHOULD BE PLACED ACROSS THE SLOPE ALONG A LINE OF UNIFORM ELEVATION (PERPENDICULAR TO THE
DIRECTION OF FLOW).
9. THE FENCE SHOULD BE LOCATED AT LEAST 10 FEET FROM THE TOE OF STEEP SLOPE TO PROVIDE SEDIMENT STORAGE
AND ACCESS FOR MAINTENANCE AND CLEANOUT. A FLAT BOTTOM TRENCH APPROX. 4 INCHES WIDE AND 12 INCHES DEEP, OR
A V-SHAPED TRENCH 12 INCHES DEEP SHOULD BE EXCAVATED.
INSPECTION AND MAINTENANCE NOTES:
1. FILTER BARRIERS SHALL BE INSPECTED BY THE FINANCIALLY RESPONSIBLE PARTY OR HIS AGENT IMMEDIATELY AFTER EACH
RAINFALL (7 DAYS MIN.) AND AT LEAST DAILY DURING PROLONGED RAINFALL. ANY REPAIRS NEEDED SHALL BE MADE
IMMEDIATELY.
2. SHOULD THE FABRIC DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE
BARRIER STILL IS NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY.
3. SEDIMENT DEPOSITS SHOULD BE REMOVED WHEN DEPOSITS REACH APPROX. 1/3 THE HEIGHT OF THE BARRIER. ANY
SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS REMOVED SHALL BE DRESSED TO CONFORM TO THE
EXISTING GRADE, PREPARED AND SEEDED.
4. CHECK FOR AREAS WHERE RUNOFF HAS ERODED A CHANNEL BENEATH THE FENCE, OR WHERE THE FENCE WAS CAUSED
TO SAG OR COLLAPSE BY RUNOFF OVERTOPPING THE FENCE. IF THE FENCE FABRIC TEARS, BEGINS TO DECOMPOSE, OR IN
ANY WAY BECOMES INEFFECTIVE, REPLACE THE AFFECTED SECTION(S) OF FENCE IMMEDIATELY.
5. REINFORCED SILT FENCE SHOULD BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION IS ACHIEVED OR AFTER
TEMPORARY BMP'S ARE NO LONGER NEEDED. TRAPPED SEDIMENT SHOULD BE REMOVED OR STABILIZED ON SITE. DISTURBED
AREAS RESULTING FROM FENCE REMOVAL SHALL BE PERMANENTLY STABILIZED.
CLASS 'A' STONE
REINFORCED SILT FENCE DETAIL NOT TO SCALE
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PROVIDE TURNING RADIUS SUFFICIENT TO ACCOMMODATE LARGE
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LOCATE ENTRANCES TO PROVIDE FOR UTILIZATION
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BY ALL CONSTRUCTION VEHICLES.
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3.
MUST BE MAINTAINED IN A CONDITION WHICH WILL PREVENT
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TRACKING OR DIRECT FLOW OF MUD ONTO STREETS.
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PERIODIC TOPDRESSING WITH STONE WILL BE NECESSARY.
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4.
ANY MATERIAL TRACKED ONTO THE ROADWAY MUST BE
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CLEANED UP IMMEDIATELY.
5.
LOCATE GRAVEL CONSTRUCTION ENTRANCE AT ALL POINTS OF
INGRESS AND EGRESS UNTIL SITE IS STABILIZED. PROVIDE
FREQUENT CHECKS OF THE DEVICE AND TIMELY MAINTENANCE.
6.
NUMBER AND LOCATION OF CONSTRUCTION ENTRANCES TO
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BE DETERMINED BY THE ENGINEER.
7.
USE CLASS 'A' STONE OR OTHER COARSE AGGREGATE APPROVED
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8.
INSTALL CONSTRUCTION ENTRANCES IN A WAY TO PREVENT VEHICLES
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FROM BYPASSING CONSTRUCTION ENTRANCE LEAVING PROJECT SITE.
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121 MANLY STREET
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Engineer
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Drawn By
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Date
APRIL 2022
Revisions
A ISSUE FOR PERMIT REVIEW 05.25.22
Project Number
2273.001
NCG01 SELF -INSPECTION, RECORDKEEPING AND REPORTING INFORMATION
CONSTRUCTION ENTRANCE
NOT TO SCALE
Sheet
C500