SECTION 158 – SOIL EROSION AND SEDIMENT CONTROL AND WATER QUALITY CONTROL
158.01 Description
This Section describes the requirements for: providing pollution control measures to maintain water quality; constructing and maintaining permanent SESC measures; and constructing, maintaining, and removing temporary SESC measures.
158.02 Materials
Provide materials as specified: Coarse Aggregate (No. 2 and No. 8) ................................ ................................ ................................ .............. 901.03 Temporary Riprap (6 to 9 inches) ................................ ................................ ................................ ................. 901.08 Soil Aggregate (I-14) ................................ ................................ ................................ ................................ ... 901.11 Welded Wire Reinforcement ................................ ................................ ................................ .................... 905.01.03 Temporary Slope Drain Pipe ................................ ................................ ................................ .................... 909.02.03 Chain-Link Fence ................................ ................................ ................................ ................................ ..... 913.02.01 Caution Fence ................................ ................................ ................................ ................................ .......... 913.02.02 Posts ................................ ................................ ................................ ................................ ..................... 913.02.02.2 Seed Mixtures ................................ ................................ ................................ ................................ .............. 917.03 Mulch ................................ ................................ ................................ ................................ .......................... 917.06 Sod ................................ ................................ ................................ ................................ .............................. 917.07 Miscellaneous Landscape Materials ................................ ................................ ................................ .............. 917.09 Geotextiles ................................ ................................ ................................ ................................ ................... 919.01 Inlet Filter, Type 1 ................................ ................................ ................................ ................................ ....... 919.01 Inlet Filter, Type 2 ................................ ................................ ................................ ................................ ....... 919.01 Sediment Control Bag ................................ ................................ ................................ ................................ .. 919.02 Haybales ................................ ................................ ................................ ................................ ...................... 919.03 Polyethylene Sheeting ................................ ................................ ................................ ................................ .. 919.12 Floating Turbidity Barrier................................ ................................ ................................ ............................. 919.13 Provide wood stakes and wood posts that are solid, reasonably knot free and conform to the nominal size shown on the Plans. Provide absorbent booms, towels, and blankets made from UV-resistant, spunbond polypropylene skin and filler.
158.03 Construction
158.03.01 Environmental Manager
Assign a supervisory-level employee experienced in all aspects of soil erosion and sediment control, water quality control, and work site waste control. Submit the name and applicable experience of this employee to the RE for approval at least 15 days before beginning any construction operations, except construction layout, on the Project. Submit written notification and obtain approval from the RE before changing the environmental manager. The environmental manager shall have the responsibi lity and sufficient authority for implementing the approved SESC and water quality methods of operations. The environmental manager shall coordinate, oversee, and supervise SESC and water quality operations on the Project. This includes both on -site and off-site activities, including those involving subcontractors. The environmental manager shall oversee and supervise all site waste control operations for the Project. The environmental manager shall attend SESC and water quality meetings. The environmen tal manager, with the RE, shall inspect SESC and site waste control measures at least weekly. Perform additional inspections immediately after precipitation and other weather events that may damage SESC measures or cause uncontrolled erosion to occur. Du ring extended periods of precipitation, perform inspections every 24 hours until the precipitation has ended. Submit original Environmental Compliance Check List and Inspection Form to the RE the same day that the inspection is performed. Perform corrective actions, if required, within 24 hours of the inspection, and resubmit the Environmental Compliance Check List and Inspection Form to the RE within 2 days indicating that the corrective action has been completed.
158.03.02 SESC Measures
Construct SESC measures, as required, before starting construction operations. With the approval of the RE, the Contractor may fell trees or cut other vegetation not designated to be preserved using hand methods before constructing SESC measures. Coordinate temporary SESC measures with the permanent measures and with other construction operations to ensure effective and continuous erosion and sediment control. Construct temporary SESC measures to correct unforeseen conditions that develop during construction. If the Contractor fails to comply with SESC or site waste control provisions, the RE will suspend the Work as specified in 108.13. Maintain SESC measures regardless of construction season or other times when the Project is closed down or suspended to ensure that the SESC measures function properly. Immediately correct or replace non -functioning SESC measures to meet the specified function ality. If the Contractor fails to maintain SESC or site waste control measures, the RE will suspend the Work as specified in 108.13. Ensure that clearing and grubbing does not interfere with the construction of permanent SESC measures or other operations. When unstabilized areas caused by site development, grading, or other soil disturbing activities exist beyond 14 days, seed and mulch the disturbed areas. The RE may limit the size of unstabilized areas due to clearing, grubbing, grading, or other soil disturbing activities based on site conditions and the Contractor’s ability to install and maintain SESC measures. Upon completion of soil disturbing activities, permanently stabilize disturbed areas within 7 days as specified in 807.03.01. If seasonal limitations preclude permanent stabilization, provide temporary SESC measures as approved by the RE. When excavation or embankment construction reaches the finished subgrade, areas where pavement is to be placed are exempt from the above stab ilization requirements. Roadways and haul roads actively used for daily conveyance of equipment, as well as areas between temporary berms, except median areas, are also exempt. Employ construction methods to minimize airborne dust and prevent soils and ot her materials from being deposited on existing roadways. Apply water or other RE approved materials to unpaved areas to control dust caused by hauling or other construction operations. Reuse, as specified in 202.03.03.C.1, dirt and other materials that have been spilled, washed, or tracked onto existing roadways by hauling or other construction operations. Remove temporary SESC measures when necessary to allow for the installation of permanent measures, or as permanent measures become functional. Notify the RE 10 days before removing temporary SESC measures. Between Substantial Completion and Completion, remove temporary SESC measures unless the RE directs that specific Items remain in place. Construct SESC measures as follows:
1.Caution Fence. Install caution f ence at locations shown on the P lans to delineate wetlands and other environmentally sensitive areas. Space posts at least every 10 feet.
2.Silt Fence. Install silt fence with geotextile buried securely in the existing soil. Join sections of the geotextile so that they work effectively as a c ontinuous fence. The Contractor may install haybales instead of silt fence when approved by the Department.
3.Heavy-Duty Silt Fence. Install heavy-duty silt fence with geotextile securely buried in the existing soil. Join sections of the geotextile so that they work effectively as a continuous fence. Install fence posts at a slight angle toward the anticipated runoff source. Install the color of heavy -duty silt fence in locations as shown in the Plans. Do not substitute orange for black or black for orange.
4.Haybale. Embed haybales in the ground and place end to end to form a continuous line without gaps. Anchor haybales in place with wood stakes.
5.Haybale Check Dams With Temporary Stone Outlets. Embed haybales into the ground and anchor in place with wood stakes. Place temporary riprap in the center of each flow line. Place temporary No. 2 c oarse aggregate immediately upgrade of each stone outlet. Place temporary riprap and No. 2 coarse aggregate on geotextile. When joining sections of geotextile, overlap the sections a minimum of 18 inches in the direction of flow.
6.Temporary Stone Check Dams. Construct temporary stone check dams i n ditches to reduce flow velocity. Place No. 2 temporary coarse aggregate immediately upgrade of each check dam. Place temporary riprap and No. 2 coarse aggregate on the geotextile. When joining sections of the geotextile, overlap the sections a minimum of 18 inches in the direction of flow. Construct temporary stone check dams with limestone rock in areas of acid producing soils as directed by the RE.
7.Temporary Slope Drains. Install temporary drainage pipe, minimum of 8 inches in diameter, on embankment slopes to intercept surface runoff where concentrated runoff will cause excessive erosion of the slope. Stake the drainpipe to the slope or secu re it with temporary riprap to prevent movement or displacement. Attach a flared end section at each end of the pipe, and install elbows that conform with the existing changes in slopes. Ensure that end sections and elbows are of the same material as the pipe to which they are joined. Construct a temporary berm using suitable material, and place haybales at the top of slope in the vicinity of the slope drain to intercept runoff and channel the runoff to the slope drain. Embed the haybales into the ground , and anchor them with wood stakes. Place temporary riprap loosely on geotextile at both ends of the pipe to prevent scour. Drape the geotextile over the top of the earth berm and anchor it as necessary. When joining sections of the geotextile, overlap the sections a minimum of 18 inches in the direction of flow.
8.Inlet Filters. Provide Type 1 and Type 2 inlet filters as follows:
a.Type 1. For a new inlet structure without a casting, mold welded steel wire fabric around the inlet walls. Extend the welded steel wire a minimum of 6 inches down each side of the structure. Secure geotextile to the welded wire fabric. Place No. 2 coarse aggregate against the inlet structure to hold the inlet filter in place. For an inlet structure with a casting and exposed exterior walls, place geotextile under the casting and extend it a minimum of 6 inches below the top of the exposed walls. Place No. 2 coarse aggregate around the drain hole opening. For an existing inlet structure without exposed exterior walls, place geotextile under the grate and extend the geotextile for a minimum of 6 inches beyond the grate. For an inlet with a curb piece and without exposed exterior walls, ensure that the opening in the curb piece has a height of 2 inches. If the opening is greater than 2 inches, achieve the 2 inch opening size by wrapping the geotextile around an app ropriately sized piece of lumber. Place the lumber against the vertical opening.
b.Type 2. Remove the inlet grate and place the inlet filter in the opening, holding out approximately 6 inches of the filter outside the frame. Replace the inlet grate to hold the filter in place. Empty the filter according to the manufacturer’s recommendations. When removing the filter, ensure that sediment does not enter into the drainage system. Clean out the filter, dispose of the sediment as specified in 202.03.03.C.2, rinse and return the filter to its original shape, and replace the filter inside the inlet.
9.Temporary Inlet Sediment Traps. Construct temporary inlet sediment traps when the elevation of the surface runoff is lower than the inlet structure. Create a 6 inch diameter opening in the inlet and place a 3 × 3 foot piece of Type 1 inlet geotextile and No. 2 coarse aggregate over the opening to prevent sediment from entering the inlet. Place temporary inlet sediment traps in each flow line upgrade of the inlet structure. Before raising the elevation of the surface runoff, remove and dispose of the temporary inlet sediment trap and repair the opening in the inlet.
10.Temporary Stone Outlet Sediment Traps. Construct temporary stone outlet sediment traps with temporary basins and riprap spillways, within existing, new, and temporary ditches. Place No. 2 coarse aggregate immediately upgrade of the spillways. Place the riprap stones and coarse aggregate on geotextile that is anchored in the soil. If sections of geotextile need to be joined, overlap the sections a minimum of 18 inches in the direction of flow.
11.Floating Turbidity Barriers. At least 10 days before installation, submit floating turbidity barrier design and placement locations for Department approval. Install floating turbidity barrier in streams or other waterbodies to contain discharge from drainage pipes and construction operations before beginning work in that area. Install floating turbidity barriers radially from the point of discharge of drainage pipes, or from construction operations that could potentially impact the waterbody. Install floating turbidity barriers parallel and as close to the shore as possible while still enabling it to float. Ensure that at least 5 feet of each end of the floating turbidity barrier is anchored on shore. When floating turbidity barrier will not work in shallow water because of fluctuating water levels or heavy currents, stake the floating turbidity barrier in a fixed position which may also include a fixed height. Provide detail for Department approval. Clean out floating turbidity barriers and keep them free from debris. Ensure floating turbidity barriers remain in place until all of the work in the area is completed, the cofferdam is removed (if applicable), and the adjacent ground area has established a firm stand of vegetation (if applicable). Remove floating turbidity barriers in such a manner as to minimize the release of sediment and debris.
12.Dewatering Basin. At least 10 days before installation, submit to the RE for approval a plan detailing the size, materials, and location for all dewatering basins. Size dewatering basins to contain the expected discharge of water and sediment based on the flow rate of the pump to be used and the volume of area to be dewatered. Contain the turbid discharge from dewatering activities in a dewatering basin to control sediment and provide water filtration. As specified in N.J.A.C 7:9B or other applicable jurisdictional regulations, provide filtration to release clean and clear water into adjacent streams or other wa terbodies. Install floating turbidity barriers where the basin outfall flows into a receiving waterbody. Ensure that the outfall of the basin does not cause erosion to or scour of the area onto which the water is being discharged. At the end of dewaterin g operations, remove the dewatering basin. Restore the disturbed area to the original condition.
13.Sediment Control Bag. At least 10 days before installation, submit to the RE for approval a plan detailing the size, location, details of aggregate base, anticipated discharge flow, and manufacturer’s catalog cuts. If the outfall of the sediment control bag flows into receiving waterbody, ensure that floating turbidity barriers are installed as specified in 158.03.02.11. Install and maintain sediment control bags according to the manufacturer’s recommendations. Size sediment control bags to accommodate anticipated sediment and flow rates. Place the sediment control bag on the slope to allow water to flow downhill through the bag. Place the discharge hose into the neck of sediment control bag and fasten to ensure that water does not leak at the connection. To increase the efficie ncy of filtration, place the bag on an aggregate bed to maximize water flow through the surface area of the bag. Size aggregate to prevent puncture of sediment control bags. Ensure that the discharge from the sediment control bag does not cause erosion to, or scour of, the area onto which the water is being discharged. When the sediment control bag is 90 percent full, can no longer efficiently filter sediment, or does not allow water to pass at a reasonable rate, remove and replace. Remove sediment control bags according to the manufacturer’s recommendations and dispose as specified in
202.03.09 Restore the disturbed area to the original condition.
14.Sediment Control Tank. At least 10 days before installation, submit sediment control tank desi gn and proposed location for Department approval. Design sediment control tanks to contain or control the expected discharge of water and sediment based on the flow rate of the pump to be used, the volume of area to be dewatered, and the frequency of removal of water, sediment, or both. Provide a sediment control tank to capture sediment and floating debris from dewatering activities. Provide filtration to release clean and clear water into adjacent streams or other waterbodies. Relocate the tank as needed to dewater other locations. Inspect the tank daily for level of sediment, debris, and water. Remove tank contents before the tank reaches 50 percent of its capacity or when the tank no longer efficiently captures sediment or floating debris. Dispose of tank contents as specified in 202.03.03.C.2. If water from the tank is being discharged into a waterbody, install floating turbidity barriers to corral the discharge area. Protect the discharge area from erosion and scour.
15.Construction Driveway. To minimize tracking of dirt and other materials onto existing roadways, provide a construction driveway at each location where vehicles exit the work site as approved by the RE. Construct driveways using No. 2 coarse aggregate placed on geotextile. Ensure that the driveway is at least 15 feet wide. The Contractor may make driveways wider if approved by RE. Maintain the driveway by top dressing or by excavating and top dressing, as directed by the RE, with additional No. 2 coarse aggregate. When the driveway is no longer required, remove the driveway, backfill to the adjacent ground elevation, and restore the disturbed area to the original condition.
16.Concrete Washout System. At least 10 days before the first concrete placement, submit to the RE for approval a plan for the co ncrete washout system. Design the concrete washout system to fully contain the concrete washout needs, concrete slurry, and the Department’s concrete testing of the Work. Ensure that each concrete washout facility prevents discharge from concrete trucks and equipment cleaning from entering into inlets and into surface or groundwater. Ensure that the location of concrete washout facilities are no closer than 50 feet from environmentally sensitive areas such as streams, wetlands, or other areas shown on the Plans. Use signs to designate concrete washout areas. Ensure that concrete washout facilities are limited to the designated areas. Ensure that the concrete washout system is in place before delivery of concrete to the site. Ensure that a secure, non-collapsing, non-water collecting cover over each concrete washout facility is in place during precipitation so that precipitation does not accumulate and cause the washout areas to overflow. If the concrete washout facility becomes 50 percent full, discontinue pouring concrete until the concrete washout facility is cleaned out. Remove hardened concrete and reuse as specified in 202.03.03.C.1. Allow slurry to evaporate, or dispose of as specified in 202.03.03.C.2. If a lined basin is used, replace the liner if it becomes damaged or compromised. Remove concrete washout facilities when no longer needed. Restore the disturbed area to original condition.
17.Absorbent Boom. Install the absorbent boom inside turbidity barrier or as shown on Plans to ensure that oil products do not escape the work site. If an oil spill occurs, remove absorbent boom after absorption of oil and dispose of as specified in 202.03.09. Replace as necessary to continually protect the waterbody.
18.Oil-Water Separator. At least 10 days before beginning the work, submit to the RE for approval a plan detailing the size, location, anticipated discharge flow and manufacturer’s catalog cuts of the oil-water separator before installation. Provide an oil -water separator for removal of free product generated in dewatering excavations in each area of petroleum contaminated groundwater. Use a self-contained factory assembled oil-water separator meeting the following requirements:
a.Capable of removing free petroleum product as required by Contractor-obtained discharge permits.
b.Designed for intermittent, varied, or continuous flows of water, oil, or combinations of non-emulsified oil- water mixtures.
c.Designed to minimize solids buildup in the separator’s oil-water collection chamber.
d.Capable of being moved about within the Project Limits as needed. Dispose of oils and sediments collected in the oil-water separators as specified in 202.03.09.
19.Oil-Only Emergency Spill Kit. Before start of construction operations, place Oil-Only Emergency Spill Kits within the Project Limits, with each kit capable of cleaning up at least 95 gallons of spill. Include Oil-Only Emergency Spill Kit, Type 1 consisting of the following:
a.An instruction manual and emergency response guide.
b.Ten 5 inch × 1 foot oil-only absorbent booms.
c.Ten 3 inch × 10 foot oil-only absorbent booms.
d.One hundred 20 × 16 inch oil-only absorbent pads.
e.Twenty temporary disposal bags and ties.
f.A 40 pound bag of loose absorbent pellets.
g.A wheeled container for the above. If a spill occurs, immediately contain the spill and notify the NJDEP Hotline (1 -877-927-6337) and the RE. Clean up and remediate the spill as directed by the NJDEP. Separately stockpile, as specified in 201.03.03.3, the contaminated material and dispose of the contaminated material as specified in 202.03.09. Submit an incident report to the RE within 10 days after clean -up that includes a summary of the incident, the clean -up and containment measures taken, the time and date of the incident, and the NJDEP case number. Replenish the kits to ensure that the specified number of complete kits are on-site at all times during construction operations.
20.Tree Protection. Before start of construction operations, install tree protection by surrounding trees and other vegetation with chain-link fence. Place the tree protection a minimum of 2 feet outside the dripline of tr ee or vegetation canopy. Do not park vehicles or equipment, or store materials within the area of tree protection. In situations where tree protection conflicts with excavation or other construction, request permission to modify tree protection and provide a protection plan for approval by the Department.
158.03.03 Erosion Control Sediment Removal
Remove sediment from sediment traps and dewatering basins when they are 50 percent filled. Remove sediment from silt fences, stone outlet structures, dams, and haybales when the sediment reaches 50 percent of the height of the SESC measure. Remove the coarse aggregate and riprap from check dams when removing the sediment. Reuse the removed material as specified in 202.03.03.C.1. Replace the coarse aggregate and riprap removed from check dams.
158.04 Measurement and Payment
The Department will measure and make payment for Items as follows:
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Source: Standard Specifications for Road and Bridge Construction, 2019 (rev. 2022-12-21) Edition. Pages 136–141 of 651. View official source ↗