SW6240401_Plansheet - SCM Detail_20240805

Docusign Envelope ID:91 B19AA4-OFDF-4416-AO87-3CFD8E62E6C5
CA R'l,.
ONSITE CONCRETE WASHOUT ` ° % z
GROUND STABILIZATION AND MATERIALS HANDLING PRACTICES FOR COMPLIANCE WITH THE NCG01 STRUCTURE WITH UNER 9;
CONSTRUCTION GENERAL PERMIT EQUIPMENT AND VEHICLE MAINTENANCE A w , _ _E A 8 Lv
Implementing the details and specifications on this plan sheet will result in the construction activity being 1. Maintain vehicles and equipment to prevent discharge of fluids. o o 'ill 0 9 m e 024441 ;� w
mt• taave Y 1 -7 O i ® • w
considered compliant with the Ground Stabilization and Materials Handling sections of the NCGO1 Construction 2, Provide drippans under an stored equipment. ° "°� .,9"` "'° "•�r'' 0 0 bi "'' ��
p YGENERAL NOTES: f--i ' j •�V1N� --.
General Permit(Sections E and F,respectively). The permittee shall comply with the Erosion and Sediment o 0 0 o 0 ° �� F•°•••..°°••���
3. Identify leaks and repair as soon as feasible,or remove leaking equipment from the project. 0- 0 90„o„� USE CLASS "B" CONCRETE THROUGHOUT. Q Q
sheet maControl lanotpapply approved
deongs site authority having conditionsand the delegated aulthoritlls and havingspecifications shown on this 4. Collect all spent fluids,store in separate containers and properly dispose as hazardous waste(recycle A pMpp PROVIDE ALL GRATED DROP INLETS OVER 3'-6" IN DEPTH WITH STEPS 12" ~Z �lll I I ftt���```` w
Y g Yl ,,,�''� t 1�■1■,..®",■, ON CENTER. USE STEPS WHICH COMPLY WITH STD. DRAWING 840.66. F-i C3 U
when passible). , _ �+�-� p J O, 8/5/2024LL 1
• M e0 m°" ° • �' " > `•••"°"E"'E"•M •1D OPTIONAL CONSTRUCTION - MONOLITHIC POUR, 2" KEYWAY, OR #4 BAR DOWELS AT
SECTION E:GROUND STABILIZATION 5. Remove leaking vehicles and construction equipment from service until the problem has been corrected. Mors esp ErwcEpzNOc�°iarm v v O p/3-�_ � o
211E pMOEE WOQIf pM.CMS°INl E '�' /IDME Mmx Map•pI,tl1Y•1M /\ /` V J
M,•rMEo trrr nEUE W"m•AuaEs 1p tptYlli,•es p,lMBNIO. 12" CENTERS AS DIRECTED BY THE ENGINEER.
6. Bring used fuels,lubricants,coolants,hydraulic fluids and other petroleum products to a recycling or p>E Z o
Required Ground Stabilization Timeframes aerL ro: ELM • USE FORMS FOR THE CONSTRUCTION OF THE BOTTOM SLAB. LU Q Q U_
disposal center that handles these materials. l U cc O 0 THE W E
mtanilicalenithin dar dayss IF s BELOW GRADE WASHOUT STRUCTURE ABOVE GRADE WASHWT STRUCTURE AS SHOWN OONESTD. NO. 840.00.D CONCRETE PIPE IS SET IN BOTTOM SLAB OF BOX, ADD TO SLAB _ � LLI C �O 4 ACT 2 1?
Site Area Description y Y Timeframe variations IN OUT �r o
after ceasing land CONSTRUCT WITH PIPE CROWNS MATCHING. ~ILL© � G� �jU0
disturbance LITTER BUILDING MATERIAL AND LAND CLEARING WASTE 1'-7" MAX. DEPTH OF THIS STRUCTURE FROM TOP OF BOTTOM SLAB TO TOP ELEVATION Q ,Q I
IS 12 FEET. f--i OU0)
(a) Perimeter dikes,swales, 1. Never bury or burn waste. Place litter and debris in approved waste containers. - F-� - 0 I
ditches,and perimeter 7 None 2. Provide a sufficient number and size of waste containers(e.g dumpster,trash receptacle)on site to USE STANDARD FRAMES AND GRATES 840.22 (SHOWN), 840.24(SHOWN), 840.20, r 0 Y W 2pI 0
slopes CONCRETE APRON 840.29, AND 840.33. r LU 7 OOO E
p contain construction and domestic wastes. © p �0 3
3. Locate waste containers at least 50 feet away from storm drain inlets and surface waters unless no other
SEE STANDARD DRAWING 840.25 FOR ATTACHMENT OF FRAMES AND GRATES NOT SHOWN. � m Q
(b) High Quality Water(HQ ) Y l cY3(IND � o
Zones 7 None alternatives are reasonably available. CHAMFER ALL EXPOSED CORNERS 1". j �� o Q
4. Locate waste containers on areas that do not receive substantial amounts of runoff from upland areas and DRAWING NOT TO SCALE. U
If slopes are 10'or less in length and are �/ m
not steeper than 2:1,14 days are does not drain directly to a storm drain,stream or wetland. 1
(c) Slopes steeper than 3:1 7 p Y CONCRETE WASHOUTS o
allowed 5. Cover waste containers at the end of each workday and before storm events or provide secondary P LAN
containment. Repair or replace damaged waste containers. 1. Do not discharge concrete or cement slurry from the site. UJ
CONCRETE U
6. Anchor all lightweight items in waste containers during times of high winds. 2. Dispose of,or recycle settled,hardened concrete residue in accordance with local and state solid waste
-7 days for slopes greater than 50'in length andg g APRON � o
with slopes steeper than 4:1 7. Empty waste containers as needed to prevent overflow. Clean up immediately if containers overflow. regulations and at an approved facility. r FRAME AND GRATES 6„ 4„ c o
(d) Slopes 3:1 to 4:1 14 -7 days for perimeter dikes,swales,ditches, 8. Dispose waste off-site at an approved disposal facility. 3. Manage washout from mortar mixers in accordance with the above item and in addition place the mixer CONCRETE APRON 4 O
TOP ELEVATION SEALANT 1„
and associated materials on impervious barrier and within lot perimeter silt fence. SEE DETAIL LL
perimeter slopes and HOW Zones 9. On business days,clean up and dispose of waste in designated waste containers. "`" o
4. Install temporary concrete washouts per local requirements where applicable. If an alternate method or CD UJ o
-10 days for Falls Lake Watershed 1/4"EXPANSION
product is to be used,contact your approval authority for review and approval. If local standard details aLLJ
_ CLASS B MATERIAL IZ-I J a
7 days for perimeter dikes,swales,ditches, are not available,use one of the two types of temporary concrete washouts provided on this detail. „ A N 6" B 6" Z CL
perimeter slopes and HQW Zones PAINT AND OTHER LIQUID WASTE = 6 6' CONCRETE CONCRETE �, F-E E
(e) Areas with slopes flatter 5. Do not use concrete washouts for dewatering or storing defective curb or sidewalk sections. Stormwater ANCHOR BAR Q Cl
14 10 days for Falls Lake Watershed unless there is zer 1. Do not dump paint and other liquid waste into storm drains,streams or wetlands. 6" 4'---1-•[ OC
than 4:1 accumulated within the washout may not be pumped into or discharged to the storm drain system or 4„ 4„ I --OUTLET PIPE O � _
slope 2. Locate paint washouts at least 50 feet away from storm drain inlets and surface waters unless no other receiving surface waters. Liquid waste must be pumped out and removed from project. 0 (� o
alternatives are reasonably available. 6. Locate washouts at least 50 feet from storm drain inlets and surface waters unless it can be shown that ra. v o• v�. a >a• v -. o, v . .
3. Contain liquid wastes in a controlled area. OUTLET PIPE SEE NOTE DETAIL o
Note:After the permanent cessation of construction activities,any areas with temporary ground stabilization shall q no other alternatives are reasonably available. At a minimum,install protection of storm drain inlet(s) 3" SEE NOTE 6" Q 0 n
be converted to permanent ground stabilization as soon as practicable but in no case longer than 90 calendar days 4. Containment must be labeled,sized and placed appropriately for the needs of site. closest to the washout which could receive spills or overflow. MAX. PIPE THIS SIDE 18 (APRON SUPPORT NOTCH) O F
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after the last land disturbing activity. Temporary ground stabilization shall be maintained in a manner to render 5. Prevent the discharge of soaps,solvents detergents and other liquid wastes from construction sites. 7. Locate washouts in an easily accessible area,on level round and install a stone entrance ad in front of 0 F-
' Y g p SECTION X-X SECTION Y-Y Q [-
the surface stable against accelerated erosion until permanent ground stabilization is achieved. the washout. Additional controls maybe required by the approving authority. l W a w
8. Install at least one sign directing concrete trucks to the washout within the project limits. Post signage on ~ = } 0 �
GROUND STABILIZATION SPECIFICATION DITCH GRADE y Q C\I ,i � o
the washout itself to identify this location. r z N
Stabilize the ground sufficiently so that rain will not dislodge the soil. Use one of the techniques in the table o Q L o
9. Remove leavings from the washout when at approximately 75%capacity to limit overflow events. [ _ #4 BAR ('3 O o z
below: PORTABLE TOILETS - - - - - - o
Replace the tarp,sand bags or other temporary structural components when no longer functional. When I - p v Q
Temporary Stabilization Permanent Stabilization 1. Install portable toilets on level ground,at least 50 feet away from storm drains,streams or wetlands unless I Q
utilizing alternative or proprietary products,follow manufacturer's instructions. I I I I- - - W F- z } w m o
• Temporary grass seed covered with straw or • Permanent grass seed covered with straw or there is no alternative reasonably available. If 50 foot offset is not attainable,provide relocation of MINIMUM DIMENSIONS AND QUANTITIES FOR CONCRETE GRATED DROP INLET i I I I f a O N LU � J m mm o
10. At the completion of the concrete work,remove remaining leavings and dispose of in an approved I f f � "` z Z O Q co 2
other mulches and tackifiers other mulches and tackifiers portable toilet behind silt fence or place on a gravel pad and surround with sand bags. disposal facility. Fill It,if applicable,and stabilize an disturbance caused b removal of washout. PIPE SPAN WIDTH HEIGHT CUBIC YARDS OF DEDUCTIONS I I I - L j Q w o E
p V p pp Y Y I I Lz d � � L � � �
• Hydroseeding • Geotextile fabrics such as permanent soil 2. Provide staking or anchoring of portable toilets during periods of high winds or in high foot traffic areas. CONCRETE IN Box FOR ONE PIPE I I I O p O = � = z M
MEDIAN D.I. w � z X
• Rolled erosion control products with or reinforcement matting 3. Monitor portable toilets for leaking and properly dispose of any leaked material. Utilize a licensed sanitary D A B H BOTTOM H PER H MIN. TOTAL C.S. R.C. I I f- 6"--�---� V Q J LUz a O O z
without temporary grass seed • Hydroseeding waste hauler to remove leaking portable toilets and replace with properly operating unit. SLAB FT. HT. TOTAL Z v Q O W CDC°
121, 3'-8" 2'-0" 2'-6" 0.362 0.247 0.597 0.958 0.020 0,032 (' O 0 cc cc o O
• Appropriately applied straw or other mulch • Shrubs or other permanent plantings covered "All
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with mulch 15" 3'-8" 2'-0" 2'-9" 0.362 0.247 0.659 1.021 0.023 0.036 DOWEL V c
• Plastic sheeting
• Uniform and evenly distributed ground cover HERBICIDES,PESTICIDES AND RODENTICIDES
1811 3'-8" 2'-0" 3'-0" 0.362 0.247 0.720 1 .082 0.033 0.049 E
24" 3'-8" 2'-0" 3'-6" 0.362 0.247 0.865 1 .227 0.059 0.085 0 sufficient to restrain erosion EARTHEN STOCKPILE MANAGEMENT 1. Store and apply herbicides,pesticides and rodenticides in accordance with label restrictions. 0
. Structural methods such as concrete,asphalt or 1. Show stockpile locations on plans. Locate earthen-material stockpile areas at least 50 feet away from 30 3'-8 2 0 4 0 0.362 10.247 1 0.988 1.350 0,092 0.127 ISHEET 1 OF 1
LE
retaining walls 2. Store herbicides,pesticides and rodenticides in their original containers with the label,which lists s6" 3 _g 2 _pl 4' 6„ 0.362 0.247 1.112 1.474 0.132 0.178 U) � �
g storm drain inlets,sediment basins,perimeter sediment controls and surface waters unless it can be directions for use,ingredients and first aid steps in case of accidental poisoning. 84� ■ 1 S z z z
. Rolled erosion control products with grass seed shown no other alternatives are reasonably available. w w �'
2. Protect stockpile with silt fence installed along toe of slope with a minimum offset of five feet from the toe 3. Do not store herbicides,pesticides and rodenticides in areas where flooding is possible or where they 2
may spill or leak into wells,stormwater drains,ground water or surface water. If a spill occurs,clean area
of stockpile. O O
POLYACRYLAMIDES PAMS AND FLOCCULANTS immediately. v or o
( ) 3. Provide stable stone access point when feasible. Cr or
4. Do not stockpile these materials onsite. LU L., w
1. Select flocculants that are appropriate for the soils being exposed during construction,selecting from the 4. Stabilize stockpile within the timeframes provided on this sheet and in accordance with the approved plan Q Q Q
NC DWR List of Approved PAMS/Flocculants. and any additional requirements. Soil stabilization is defined as vegetative,physical or chemical coverage
2. Apply flocculants at or before the inlets to Erasion and Sediment Control Measures. techniques that will restrain accelerated erosion on disturbed soils for temporary or permanent control "STRAW W NET" O
HAZARDOUS AND TOXIC WASTE - ^
3. Apply flocculants at the concentrations specified in the NC DWR List of Approved PAMS/Flocculants and in needs. TEMP. SWALE �^ O O O
accordance with the manufacturer's instructions. 1. Create designated hazardous waste collection areas on-site. > �
g LINER AS SHOWN LL, v, Ln �%
4. Provide ponding area for containment of treated Stormwater before discharging offsite. 2. Place hazardous waste containers under cover or in secondary containment. 0 CY LU LU 0 0
3. Do not store hazardous chemicals,drums or bagged materials directly on the ground. o 0
5. Store flocculants in leak-proof containers that are kept under storm-resistant cover or surrounded by v v Q)
secondary containment structures. 2.5 o
1 1 0 0 oN
NCGO I GROUND STABILIZATION AND MATERIALS HANDLING EFFECTIVE: 04/01/19 3 3 NLn
CD
SEED PER CDo g
PROJECT
SPECS
PART III PART III PERMANENT SWALE "A"
SELF-INSPECTION,RECORDKEEPING AND REPORTING SELF-INSPECTION,RECORDKEEPING AND REPORTING NTS
PART III
SECTION A:SELF-INSPECTION SECTION B:RECORDKEEPING SELF-INSPECTION,RECORDKEEPING AND REPORTING
7E
Self-inspections are required during normal business hours in accordance with the table below. When adverse 1. E&SC Plan Documentation z
weather or site conditions would cause the safety of the inspection personnel to be in jeopardy,the inspection SECTION C:REPORTING ROADSIDE DITCH CALCULATION TABLE
The approved E&SC plan as well as any approved deviation shall be kept on the site. The approved E&SC plan
may be delayed until the next business day on which it is safe to perform the inspection. In addition,when a SWALE 1. Occurrences that Must be Reported must be kept up-to-date throughout the coverage under this permit. The following items pertaining to the E&SC p # C I A Q1 O(CFS) SWALE SLOPE In NORMAL DEPTH VELOCITY SHEAR STRESS SWALE TYPE SHEAR STRESS
storm event of equal to or greater than 1.0 inch occurs outside of normal business hours,the self-inspection shall plan shall be kept on site and available for inspection at all times during normal business hours. Permittees shall report the following occurrences: (IN/HR) (AC.) =CIA M (FT) (FT/S) REQUIRED (PSF) PROVIDED (PSF) J J
be performed upon the commencement of the next business day. Any time when inspections were delayed shall 1 0.5 7.2 0.2 0.7 1.0 0.03 0.4 1.6 0.25 A 1.45
be noted in the Inspection Record. Item to Document Documentation Requirements (a) Visible sediment deposition in a stream or wetland. o
2 0.5 7.2 0.8 2.9 3.8 0.03 0.5 3.7 1.19 A 1.45 ��
Frequency (a) Each E&SC measure has been installed Initial and date each E&SC measure on a copy 3 0.5 7.2 0.8 2.9 1.0 0.03 0.7 2.2 0.44 A 1.45 aD
Inspect (during normal Inspection records must include: and does not significantly deviate from the of the approved E&SC plan or com plete,date (b) Oil spills If:
4 0.5 7.2 0.5 1.8 4.4 0.03 0.4 3.4 1.10 A 1.45
business hours) locations,dimensions and relative elevations and sign an inspection report that lists each • They are 25 gallons or more, U J
(1)Rain gauge Daily Daily rainfall amounts. 5 0.5 7.2 0.5 1.8 1.3 0.03 0.5 2.2 0.41 A 1.45
pp p pp t`T
shown on the approved E&SC Ian. E&SC measure shown on the approved E&SC [V
maintained in If no daily rain gauge observations are made during weekend or • They are less than 25 gallons but cannot be cleaned up within 24 hours, p
plan. This documentation is required upon the 6 0.5 7.2 0.5 1.8 5.0 0.03 0.4 3.8 1.25 A 1.45
good working holiday periods, and no individual-day rainfall information is • The cause sheen on surface waters(regardless of volume),Or J
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order available, record the cumulative rain measurement for those un- initial installation of the E&SC measures or if Y ( g ] 7 0.5 7.2 0.5 1.8 1.7 0.03 0.5 2.4 0.53 A 1.45 _
attended days (and this will determine if a site inspection is the E&SC measures are modified after initial • They are within 100 feet of surface waters(regardless of volume). 8 0.5 7.2 0.2 0.7 2.2 0.03 0.4 3.6 0.41 A 1.45 N ❑
needed). Days on which no rainfall occurred shall be recorded as installation. r- 01 z
"zero." The permittee may use another rain-monitoring device N C
approved by the Division. (b) A phase of grading has been completed. Initial and date a copy of the approved E&SC U
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(c) Releases of hazardous substances in excess of reportable quantities under Section 311 of the Clean as z
(2) E&SC At least once per 1. Identification of the measures inspected, plan or complete,date and sign an inspection Z pz
p p 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. H y z
Measures 7 calendar days 2. Date and time of the inspection, report to indicate completion of the ( ) ( )
and within 24 3. Name of the person performing the inspection, construction phase. C
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hours of a rain 4. Indication of whether the measures were operating U tl] a
event>1.0 inch in properly, (c) Ground cover is located and installed Initial and date a copy of the approved E&SC (d) Anticipated bypasses and unanticipated bypasses. W
24 hours 5. Description of maintenance needs for the measure, in accordance with the approved E&SC plan or complete,date and sign an inspection w
6. Description,evidence,and date of corrective actions taken. plan. report to indicate compliance with approved J ❑ 0 w
(3)Stormwater At least once per 1. Identification of the discharge autfalls inspected, ground cover specifications. (e) Noncompliance with the conditions of this permit that may endanger health or the environment.
discharge 7 calendar days 2. Date and time of the inspection, C
outfalls(SDOs) and within 24 3. Name of the person performing the inspection, (d) The maintenance and repair Complete,date and sign an inspection report. LL w 7
hours of a rain 4. Evidence of indicators of stormwater pollution such as oil requirements for all E&SC measures 2. Reporting Timeframes and Other Requirements -C `~
event>1.0 inch in sheen,floating or suspended solids or discoloration, have been performed. U - c
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24 hours 5. Indication of visible sediment leaving the site, After a permittee becomes aware of an occurrence that must be reported,he shall contact the appropriate
6. Description,evidence,and date of corrective actions taken. (e) Corrective actions have been taken Initial and date a copy of the approved E&SC
Division regional office within the timeframes and in accordance with the other requirements listed below.
4 Perimeter of At least once per f visible sedimentation is found outside site limits,then a record to E&SC measures. plan or complete,date and sign an inspection -0 C4 J
( ) p Occurrences outside normal business hours may also be reported to the Departments Environmental Emergency az W
site 7 calendar days of the following shall he made: report to indicate the completion of the IY U-)
and within 24 1. Actions taken to clean up or stabilize the sediment that has left corrective action. Center personnel at(800)858-0368. .0 C7
hours of a rain the site limits, N 0
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event>1.0 inch in 2. Description,evidence,and date of corrective actions taken,and Occurrence Reporting Timeframes(After Discovery)and Other Requirements Ln Q• w
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24 hours 3. An explanation as to the actions taken to control future 2.Additional Documentation to be Kept on Site (a)Visible sediment • Within 24 hours,an oral or electronic notification.
releases' In addition to the E&SC plan documents above,the following items shall be kept on the deposition in a . Within 7 calendar days,a report that contains a description of the w
(5)Streams or At least once per If the stream or wetland has increased visible sedimentation or a site and available for inspectors at all times during normal business hours,unless the stream or wetland sediment and actions taken to address the cause of the deposition.
wetlands onsite 7 calendar days stream has visible increased turbidity from the construction 0-
or offsite and within 24 activity,then a record of the following shall be made: Division provides a site-specific exemption based on unique site conditions that make Division staff may waive the requirement for a written report on a :5
(where hours of a rain 1. Description,evidence and date of corrective actions taken,and this requirement not practical: case-by-case basis.
accessible) event>1.0 inch in 2. Records of the required reports to the appropriate Division • If the stream is named on the NC 303(d) list as impaired for sediment- w
24 hours Regional Office per Part III,Section C,Item(2)(a)of this permit. related causes,the permittee may be required to perform additional
6 Ground After each phase 1. The phase of grading installation of perimeter E&SC (a) This General Permit as well as the Certificate of Coverage,after it is received. • o
( ) p p g g{' p monitoring,inspections or apply more stringent practices if staff
stabilization of grading measures,clearing and grubbing,installation of storm determine that additional requirements are needed to assure compliance
measures drainage facilities,completion of all land-disturbing (b) Records of inspections made during the previous twelve months. The permittee shall record the required
with the federal or state impaired-waters conditions. (D
activity,construction or redevelopment,permanent observations on the Inspection Record Form provided by the Division or a similar inspection form that a
ground cover). (b)Oil spills and Within24 hours,an ti oral or electronic notification. The notificaon
includes all the required elements. Use of electronically-available records in lieu of the required paper o
2. Documentation that the required ground stabilization release of shall include information about the date,time,nature,volume and
copies will be allowed if shown to provide equal access and utility as the hard-co records.
measures have been provided within the required p p q Y hard-copy hazardous location of the spill or release. a,
timeframe or an assurance that they will be provided as substances per Item
soon as possible. 3.Documentation to be Retained for Three Years 1(b) (c)above
All data used to complete the a N01 and all inspection records shall be maintained for a period (c)Anticipated A report at least ten days before the date of the bypass,if possible.
NOTE:The rain inspection resets the required 7 calendar day inspection requirement. of three years after project completion and made available upon request.[40 CFR 122.411 bypasses[40 Cl The report shall include an evaluation of the anticipated quality and U
122.41(m)(3)] effect of the bypass. No E
(d)Unanticipated • Within24 hours,an oral or electronic notification. N CD �
PART II,SECTION G,ITEM(4) W r- CD
bypasses[40 Cl • Within calendar days,a report that includes an evaluation of the * N
DRAW DOWN OF SEDIMENT BASINS FOR MAINTENANCE OR CLOSE OUT
122.41(m)(3)] quality and effect of the bypass. J - o Om
(e) Noncompliance • Within24 hours,an oral or electronic notification. J Q 0 w LU 0
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 with the conditions Within 7 calendar days,a report that contains a description of the - LL Q
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 of this permit that noncompliance,and its causes;the period of noncompliance, Q
following Criteria have been met: may endanger including exact dates and times,and if the noncompliance has not LJ I J
health or the been corrected,the anticipated time noncompliance is expected to Q
(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 environment[ao continue;and steps taken or planned to reduce,eliminate,and z Q o
CFR 122.41(I)(7)] prevent reoccurrence of the noncompliance. [40 Cl 122.41(I)(6). O u
shall not commence until the E&SC plan authority has approved these items, • Division staff may waive the requirement for a written report on a I
(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, case-by-case basis. W o
(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 > o N U
properly sited,designed and maintained dewatering tanks,weir tanks,and filtration systems, > II Q
(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, - s
(e) Velocity dissipation devices such as check dams,sediment traps,and riprap are provided at the discharge points of all dewatering devices,and J
(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. w
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NCGOI SELF-INSPECTION, RECORDKEEPING AND REPORTING EFFECTIVE: 04/01/19
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