00280.00 224 Section 00280 - Erosion and Sediment Control
Description
00280.00Scope - This Work consists of controlling Soil erosion by wind, water, or other means and
preventing eroded Sediments and other construction-generated pollutants from moving off the Project Site, Agency controlled material sources, disposal sites, and off -site mitigation areas in order to comply with f ederal, State, and local laws, rules and regulations, and the Agenc y's National Pollutant Discharge Elimination System (NPDES) 1200 permit or permits applicable to the Project.
This Work also consists of providing temporary erosion and sediment control (ESC) measures and furnishing, installing, moving, operating, maintai ning, inspecting, and removing ESC throughout the Project area according to the Standard Drawings , the erosion and sediment control plan (ESCP), the Specifications, or as directed, until the site is permanently stabilized. Included also is the monitoring of weather, of stormwater and receiving waters, the reporting of monitoring observations, the reporting of corrective actions (when necessary) and the updates and revisions of the ESCP, including ESCP cover sheet, necessary to keep it representative of cur rent site conditions and compliant with the 1200-CA permit.
When contaminants, pollutants or hazardous materials are discovered in the Project location in soils or groundwater comply with 00290.30(f) and, provide an environmental management plan (EMP) as required by the 1200-CA permit.
The Work described in the Specifications and shown on the Plans is part of the Project ESCP and represent the minimum requirements for all Project Sites and conditions.
00280.01Abbreviations :
BMP Best Management Practices EMP Environmental Management Plan ESC - Erosion and Sediment Controls ESCP - Erosion and Sediment Control Plan ESCM - Erosion and Sediment Control Manager
00280.02Definitions :
Effective Functioning - Preventing Erosion, controlling R unoff, or controlling Sediment in each location where an ESC is needed so Erosion-related impacts of site construction are mitigated as required.
Erosion - The wearing away of the land surface by water, wind, ice, gravity or other geo logical agents.
Perimeter Controls - Perimeter Controls include sediment fences, ditches, filter berms in flatter areas, and other methods for preventing Sediment and other construction-generated pollutants from leaving the construction site. PermanentS tabilization - Maintenance-free measures or methods necessary to prevent E rosion or Sediments from leaving the Project Site .
Runoff - That portion of precipitation that flows from drainage area on the land surface, in open channels or in stormwater conveyance systems.
00280.04 225 Sediment - Fragmented material originated from weathering and Erosion of Rock and unconsolidated deposits. Sediment also includes fragmented materials from man-made materials. The material is transported by, suspended in, or deposited by water.
Temporary Stabilization - Covering soil or other measures to prevent Erosion until Permanent Stabilization measures are in place and established.
Wet Season Work - Wet season Work is defined as Work between October 1 and May 31.
00280.03Standards - When designing, applying, installing maintaining, inspecting, and removing
erosion and sediment control devices, use and follow the version in effect on the date the Project is advertised, of the ODOT Erosion and Sediment Control manual .
00280.04Erosion and Sediment Control Plan on Agency Controlled Lands - For Work on
Agency -Controlled Lands use either the Agency's ESCP, a Contractor modified version of the Agency's ESCP, or a Contractor developed ESCP. Submit the following for approval at least 10 Calendar Days before the preconstruction conference:
• When using the Agency's ESCP with only modifications required to keep the ESCP current during construction, submit a written notification indicating the Agency's ESCP is used without modifications prior to construction. Prior to beginning construction, edit the ESCP to provide a list of all contractors working on the site. Prior to beginning construction , edit the ESCP cover sheet to list all personnel by name and position who are responsible for the installation and maintenance of stormwater control measures including their indiv idual responsibilities and certifications. Keep list current for the duration of the project. • When using a Contractor modified version of the Agency's ESCP, include the following: • Proposed ESCP showing all ESC Work , and quantities of Work . An EMP that addresses pollution prevention and control of potentially contaminated sites or Materials when pollutants are known to be present . • Implementation schedules for the ESCP. Plans for each phase of the Contractor’s Work. Names and positions of all personnel engaged in construction activities. Names and positions of all personnel responsible for the installation and maintenance of stormwater control measures. Information required under 1200-CA permit. When using a Contractor developed ESCP, develop and stamp the ESCP by a professional with one of the following credentials. Include their name and credentials in the ESCP. The ESCP preparer shall be one of the following: Oregon Registered Professional Engineer, Oregon Registered Landscape Architect; or Oregon Certified Engineering Geologist When using a Contractor developed ESCP where engineered facilities such as sedimentation basins or diversion structures for erosion and sediment control are required, prepare and stamp the ESCP by one of the following: Oregon Regis tered Professional Engineer; or Oregon Registered Landscape Architect. 00280.05 226 When using a Contractor developed ESCP, provide plans for each phase of Contractor’s work implementation schedule and information required under the 1200-CA permit and as directed in ODOT’s Erosion Control Manual. Do not begin any site activities that have potential to cause Erosion or Sediment movement until the ESCP and implementation schedules are approved by the Engineer.
Update the ESCP and schedule as needed to ensure thatS ediment does not leave the construction site.
Additional or revised erosion and sediment control features, not shown on the initial ESCP, may be required depending on the Contractor's methods of operation and schedule to provide Effective Functioning of ESC. Ensure that the Contractor's construction ESCP and implementation schedules are prepared by an individual who meets qualifications of 00280.30. Furnish a signed copy of the ESCP with individual's name, title, state certifications, and employing firm if different than Contractor's firm.
Keep a copy of the approved ESCP with updated changes on-site during all construction activities. If there are approved changes, add them to the ESCP no later than 24 hours after implementation.
During inactive periods longer than 7 Calendar Days, keep the ESCP on-site or provide a copy to the Engineer to retain.
00280.05Erosion and Sediment Control Plan on Non -Agency Controlled Lands - For Work on
non-Agency controlled lands, in addition to the requirements of 00280.04, submit the following for review 10 Days before the preconstruction conference:
• A Contractor -developed ESCP for each uni que site covered under a Non-Agency NPDES 1200 permit. • A description of how the ESCP will be implemented and monitored on these sites. • A complete list of other applicable permits controlling Work on these lands, whether the Agency is one of the permittees or not, and copies of the applicable permits or proof that permits are not required from all pertinent federal, State, county, city, and local agencies. • Signed letter from the property owner that allows the Contractor access to the property. Include a sta tement in the letter that holds the Agency harmless for all consequences related to the Contractor's use of the property. • Signed agreement with the property owner detailing the Contractor's operation, use of the property, and stating that Contractor will abide by permits, if any. If the Contractor's operations require Work on non-Agency controlled lands not presented 10 Days before the preconstruction conference, or if changes to the Contractor's submitted ESCP are necessary, obtain approval of a new or revised ESCP from the Engineer before beginning Work .
00280.06Erosion and Sediment Control Manager - Designate and provide a representative as the
Erosion and Sediment Control Manager (ESCM) who meets the qualifications of 00280.30.
Materials
00280.14Erosion Prevention Materials:
protection meeting the following requirements:
00280.14 227 • Plastic Sheeting - Minimum 6-mil thick polyethylene plastic sheeting. Rock - Class 50 riprap conforming to Section 00390. Sand Bags - Sand bags meeting the requirements of 00280.15(a). Sand bags may also be filled with sand. Sediment Barrier - Fiber rolls and compost filter sock meeting the requirements of 00280.15(a). Staples - 1/8 inch diameter steel wire staples. 2 inch "U" width with a length of 6 inches minimum.
of 01030.16.
meeting the requirements of Section 01030.
performance criteria categories:
• Type A - Slope protection mat , fully biodegradable, for Clay Soil Slopes 1V:3H or flatter. Type B - Slope protection mat , fully biodegradable, for sandy Soil Slopes 1V:3H or flatter. Type C - Slope protection mat , fully biodegradable, for Clay Soil Slopes steeper than 1V:3H. Type D - Slope protection mat , fully biodegradable, for sandy Soil Slopes steeper than 1V:3H. Type E - Flexible channel liner , fully biodegradable, for shear stress from 0 to 2 pounds per square foot. Type F - Flexible channel liner for shear stress from 2 to 4 pounds per square foot. Type G - Flexible channel liner for shear stress from 4 to 6 pounds per square foot. Type H - Flexible channel liner for shear stress from 6 to 8 pounds per square foot. Where shown, furnish rolled slope protection matting or hydraulically applied bonded fiber matrix slope protection matting that consists of fully biodegradable long fiber strands held together by a water resistant bonding agent. Channel liner mattings, types F, G and H may be installed as permanent features and are not required to be fully biodegradable. Furnish check slot and anchor trench material and fasteners for matting meeting the following requirements:
• Class 50 Riprap - Class 50 riprap meeting the requirements of Section 00390. • Soil - Soil meeting the requirements of 00330.13.
00280.15 228 • Staples - 1/8-inch diameter steel wire staples. 1-in ch "U" width with a length of 9 inches minimum for cohesive Soils , and 1/2-inch "U" width with a length of 12 inches minimum for non-cohesive Soils . • Pins - 3/16-inch diameter steel pin with a 2- inch diameter steel washer secured at the head of the pin with a length of 18 inches minimum for cohesive Soils and 24 inches minimum for non -cohesive Soils .
meeting the requirements of Section 03020. Add tackifier meeting the requirements of 01030.16.
Apply tackifier at the rates shown or as recommended by the manufacturer.
the requirements of 01030.15(b).
00280.15Runoff Control Materials :
• Type 1: Aggregate - Aggregate sized between 4 inches maximum and 1 inch minimum meeting the requirements of 00330.16. Type 2: Fiber Rolls - Fiber rolls or wattles that are pre-manufactured, filled with plant based, naturally occurring fiber (e.g.: straw, wood, excelsior, hemp or coconut fiber) that contains no weed seeds and that is not moldy, caked, decayed or of otherwise low quality. When straw is used, furnish straw meeting the requirements of 01030.15(b). Furnish fiber roll that is fully biodegradable with enclosing netting derived from natural fibers (e.g.: jute, sisal, hemp or coir fiber). Furnish rolls with a minimum density of 2.75 pounds per cubic foot and constructed to hold its shape to provide a diameter of between 8 and 10 inches. Type 3: Biofilter Bags - Minimum size 18 by 6 by 30-inch plastic mesh bags with 1/2- inch openings filled with approximately 45 pounds of clean, non- toxic 100 percent recycled wood product waste containing no fine materials or Sediments, or as shown on the Standard Drawings for this device. Type 4: Sand Bags - Durable, weather -resistant bags woven tightly enough to prevent leakage of filler material . Fill bags with at least 75 pounds of firmly -packed fine PCC 3/8" - 0 Aggregate, or round 3/8" - 3/16" pea gravel. Type 5: Prefab ricated System - Prefabricated check dam system conforming to the manufacturer's recommendations and on the QPL. Field fabricated systems are not acceptable. Type 6: Compost Filter Sock - Filters ock material , compost, and stakes meeting the requirements of 00280.15(f).
following requirements:
• Seeding, Fertilizing and Mulching - Permanent or temporary seeding, fertilizing and mulching meeting the requirements of Section 01030. Dike Material - Soil meeting the requirements of 00330.13.
requirements:
• Type 1 - Concrete drainage curb meeting the requirements of 00480.10. 00280.16 229 Type 2 - Asphalt concrete drainage curb meeting the requirements of 00480.10. Type 3 - Sand bags meeting the requirements of 00280.15(a).
requirements of Section 02410 or metal pipe and flared end sections meeting the requirements of
and 4 inches meeting the requirements of 00330.16.
requirements:
and consisting of continuous H DPE filament or polypropylene material or 100 percent biodegradable mesh netting from the QPL.
of Section 03020.
the requirements of Section 03020.
00280.16Sediment Control Materials :
• Aggregate - Clean, durable, open-graded angular Aggregate sized according to the following grading requirements:
Sieve Size Percent Passing (by weight) 6” 100 4” 60 - 90 3” 40 - 70 2” 20 - 50 1” 0 - 20 #4 0 - 2 • Geotextile - Subgrade geotextile meeting the requirements of Section 02320. Provide documentation according to 02320.10(c). Prefabricated Construction Entrance - Furnish reusable prefabricated construction entranc e mats (track out mats) with the following characteristics: • Track out mats consisting of irregular driving surface provided by ridges, knobs or pyramidal extensions (protrusions) not less than 2 1/2 inches height that collects dislodged material off Equipm ent tires and surface below protrusions. • Modular and designed to be fixed together into widths and lengths as needed and anchored in place. • High visibility coloration • Chemical and UV resistant 00280.16 230 • Crush strength not less than 20,000 pounds
• Aggregate - Aggregate meeting the requirements of 00280.16(a). Geotextile - Subgrade geotextile meeting the requirements of Section 02320. Provide documentation according t o 02320.10(c). Corrugated Steel Panels - Corrugated steel panels with flexural strength adequate to bear the weight of the vehicles accessing the construction site without deformation.
• Geotextile - Geotextile meeting requirements of Section 02320. Provide documentation according to 02320.10(c). Posts - Untreated wood posts (wood stain is acceptable).
• Type 2: • Wire Mesh - 19-gauge steel -wire mesh with 3/8 by 3/8-inch openings. • Geotextile - Type 1 geotextile meeting the requirements of Section 02320. Provide documentation according to 02320.10(c). • Aggregate - Open -graded Aggregate meeting the requirements of 02630.11. Type 3: Prefabricated Filter Inserts - Prefabricated filter inserts manufactured specifically for collecting Sediment in drainage inlets and fr om the QPL. Include handles and fasteners sufficient to keep the insert from falling into the inlet during maintenance and removal of the insert from the inlet. Type 4: • Biofilter Bags - Biofilter bags meeting the requirements of 00280.15(a). • ReinforcingS teel - Commercial grade reinforcing steel meeting the requirements of 02510. Type 6: Sod - Grass sod meeting the requirements of 01040.19(h). Type 7: • Filter sock material, compost, and stakes meeting the requirements of 00280.15(f). • Sand bags conforming t o 00280.15(a). Type 10: Curb Inlet Sediment Dam - Provide one (or more) of the following curb inlet sediment barrier from products, or as approved: • Ertec - Curb Inlet Protection • ACF - Econo Curb • GEI Works - Taurus Curb Inlet Filter • GEI Works - Ultra -Curb Inlet Guard • Ultratech - Ultra -Curb Guard Plus
following requirements:
• Type 2: Biofilter Bags - Biofilter bags meeting the requirements of 00280.15(a). 00280.16 231 Type 3: Fiber Rolls - Fiber rolls or wattles meeting the requirements of 00280.15(a). Type 4: Sand Bags - Sand bags meeting the requirements of 00280.15(a). Type 5: Brush Barrier - Maximum 6 -inch diameter woody debris brush or Topsoil strippings for brush barriers. Provide Type 1 sediment fence geotextile meeting the requirements of Section 02320. Provide documentation according to 02320.10(c). Type 6: Aggregate Barrier – Clean , well-graded, angular Aggregate with maximum size between 4 inches and 1 inch, meeting the requirements of 00330.16, except no more than 5 percent of the material (by weight ) shall pass the No. 40 sieve. Type 7: Prefabricated Barrier System - Prefabricated barriers manufactured specifically for temporarily obstructing the flow of sediment -laden water and from the QPL. Type 8: Compost Filter Sock - Filter sock material , compost , and stakes meeting the requirements of 00280.15(f) : Type 9: Compost Filter Berm - Commercially manufactured coarse compost material meeting the requirements of Section 03020.
following requirements:
• Geotextile - Type 1 riprap geotextile meeting the requirements of Section 02320. Provide documentation according to 02320.10(c). Class 100 Riprap - Class 100 riprap meeting the requirements of Section 00390.
stamped and signed by a licensed engineer. Where soils are engineered with cementitious material, and a potential for Runoff exists, furnish temporary sediment trap to capture Runoff from engin eered soils.
of sufficient size and quantity to retain all concrete wash water and concrete waste developed during construction, meeting the following requirem ents:
• Straw Bales - Standard rectangular straw bales, with straw Material according to 01030.15, except no certification is required. • Plastic Sheeting - Minimum 10 -mil thick polyethylene plastic sheeting. • Staples - 1/8-inch diameter steel wire staples. 2-inch "U" width with a length of 6 inches minimum.
pumps and other engineered or mechanical means to clean water. Include with the active treatment system an operation and maintenance plan that includes system schematic, inlet and discharge details and sampling plan, including discharge water sampling frequency. Active treatment sys tems may consist of the following:
00280.30 232 Flocculants - Materials that cause Sediments to fall out of suspension and are fully biodegradable and harmless to aquatic organisms. Electro -Coagulation - Electro -mechanical system using pumps and electricity to remove Sediment from water. Filtration - Mechanical system using pumps and filters to remove Sediment from water.
Labor
00280.30Erosion and Sediment Control Manager - If the Agency's NPDES 1200-CA permit is
applicable to the Project, d esignate and provide an ESCM who possesses a valid ODOT ESCM certificate or who has successfully completed an erosion control training that is acceptable to the Engineer .
The ESCM duties include:
• Manage and ensure proper implementation of the ESCP. • Accompany the Engineer during field review of the ESCP prior to construction activities. • Monitor rainfall , snow melt and Runoff at the Project Site. • Monitor water quality in receiving streams in the vicinity of the Project Site. Monitor water in Sediment traps receiving R unoff from soils amended with cementitious material for acidity or alkalinity. • Inspect ESC and monitor receiving waters on active construction site on initial date and every 14 Days for Effective Functioning. • Inspect ESC on inactive sites every 14 Days for Effective Functioning. • Inspect ESC for Effective Functioning and monitor receiving waters on all active and inactive sites at least within 24 hours of rainfall events sufficient to result in R unoff from the Project Site . West of the Cascades, after 0.1 inch of rainfall, inspect conveyances for runoff and monitor site if runoff is observed. Fill out and provide monitoring report for each site inspecti on and include the following: Photographs of any BMP that is not providing effective functioning or requires maintenance. Provide sufficient photographic documentation of all BMPs that are providing Effective Functioning. • Ensure that ESC are regularly clea ned and maintained. • Mobilize crews to make immediate repairs to ESC or install additional ESC during working and non-working hours when ESC is not effectively functioning. • Record actions taken to clean up discharged Sediment. • Report potential permit violations to the Agency immediately upon discovery . • Repair conditions that caused permit violations and prepare submittals for corrective actions according to 00280.64. • Update the ESCP monthly and within 7 Days after changes or major ESC modifications are imple mented in the field . Submit ESCP revisions in electronic format, to Engineer within 30 Days after making revisions. • Prepare for wet weather during the periods between October 1 and May 31 according to 00280.41(c) . • Accompany the Engineer on inspections and, if required, on inspections by representatives of regulating agencies. If any of the following occur, revise the ESCP to reflect the change(s) within 7 Days. 00280.30 233 Changes to the construction plans that impact erosion and sediment control measures; Changes to the stormwater control BMPs, their location, maintenance required, and any other revisions necessary to prevent erosion and controlS ediment Runoff; An increase in the area impacted by construction activities; Other activities at the site t hat are no longer accurately reflected in the ESCP. This includes changes made in response to corrective actions triggered; To reflect areas on the site map where operational control has been transferred (and the date of transfer) since initiating permit coverage; If inspections by DEQ determine that ESCP revisions are necessary for compliance with the 1200-CA permit; Where DEQ determines it is necessary to install or implement additional controls at the site in order to meet the requirements of the 1200-C A permit. Include the following in the ESCP: • A copy of any correspondence describing such measures and requirements; and • A description of the controls to be used to meet such requirements. Change of Subcontractors that engage in construction activities on site, and the areas of the site where the Subcontractor(s) engage in construction activities; Change of any personnel (by name and position) that are responsible for the design, installation and maintenance of stormwater control measures; Change of the certified erosion and sediment control inspector, or of their contact information and any applicable certification and training experience; To reflect any revisions to applicable federal, state, tribal, or local requirements that affect the stormwater controls implemented at the site; and If a change in chemical treatment systems or chemically enhanced stormwater control is made, including use of a different treatment chemical, different dosage rate, or different area of application, as applicable. Furnish t emporary Sediment trap as shown on drawings, stamped and signed by licensed engineer.
When Work on Project or portion of Project is temporarily suspended and those portions of the site are stabilized to eliminate risk of sediment discharge, reduce monitoring frequency as follows: Twice a month, not less than 14 days apart, after work in that area has stopped. After this first month, and the site remains stabilized, monitoring frequency can be reduced to once per month. Upon resumption of work, return to the standard monitoring frequency. Document the beginning and end dates of area’s work suspension on monitoring form and identify area(s) of work suspension on ESCP revision. Submit revised ESCP to Engineer for signature by licensed professional (see 00280. 04) and submission to DEQ when changes are made for the following reasons: Part of a corrective action requirement; An increase or decrease in project size; An increase or decrease in size or location of disturbed areas; Changes to BMPs, such as type, design or location; Change of the ESCM.
Construction
00280.40 234 00280.40 Installation - Install ESC as shown and according to the ESCP. Install these ESC before performing clearing, grading, or other land-altering activities. Ensure Effective Functioning of ESC such that Sediment does not leave the Project boundaries, enter drainage systems or waterways, or violate applicable water quality standards.
Coordinate temporary ESC with permanent ESC and all related Project Work .
If ESC are not effective, modify or change ESC so they become effective.
00280.41Work Restrictions - The following Work restrictions apply:
clearing limits with high visibility markings and do not disturb areas outside the clearing limits. Prior to beginning construction activities, delineate and protect riparian areas including trees, root zones and vegetation to be preserved and delineate and protect vegetated buffer zones according to
(e). Protect post -construction stormwater facilities, unless used during construction as
sediment trap, in which case repair according to 00280.46(h).
ground- disturbing activities.
Work proposed during the wet sea son to ensure that all appropriate controls, including ESC during Work suspensions, are implemented and maintained. Submit the updated ESCP and schedule to the Agency and receive approval before beginning any Work during the wet season.
During the wet season, limit excavation and bare ground activities to only those required for immediate operations. Stabilize stockpiles at the end of each workday by diverting flows, placing covers, or installing Sediment barriers.
effectively controlled.
between Work and Waters of the State and sensitive areas including water bodies, wetlands, springs and seeps . Where 50 foot buffers are not attainable, provide Erosion, Runoff and Sediment control BMPs as shown or directed.
saturated loads on site or haul in water tight beds.
Underground Injection Control (UIC) inlets, catch basins or wells.
00280.42Stabilization - Stabilize Soil areas as follows:
• Statewide (Entire Year) - Within 7 D ays of exposure, stabilize all areas within 100 feet of waterways, Wetlands, or other sensitive areas using methods that do not rely solely upon germination to control Erosion. West of the Cascades (Entire Year) - Stabilize all other areas within 14 Days of exposure. East of the Cascades (October 1 through April 30) - Stabilize all other areas within 14 Days of exposure. 00280.44 235 East of the Cascades (May 1 through September 30) - Stabilize construction areas in stages based on site conditions, weather, and as determined by the Engineer.
• Every 14 Days or more frequently as needed or directed. • Upon approval, active Work areas scheduled for re-disturbance may be left unstabilized for 14-Day periods if Erosion is not occurring or imminent. • A minimum of 1 Day before expected ra in events. • At the end of each Day during wet periods. • As an emergency measure when rain is falling on unprotected areas. • When wind or vehicle traffic is visibly causing more than minor dust. • At finish grade when working outside the permanent seeding dates.
Document all implemented ESC on the ESCP. Ensure that permanent slope stabilization is achieved before removing temporary ESC.
Perform Permanent Stabilization at each completed excavation and embankment area except for areas that are scheduled to be redisturbed. If seeded areas are not sufficiently stabilized by an established stand of vegetation according to 01030.60, or if the Soil surface is not sufficiently protected with temporary stabilization ESC by October 1 of each year, do the following:
• Use ESC necessary to redirect water flows away from disturbed areas. • Re-grade disturbed areas to finish grade. • Apply permanent seeding at the original specified rate. • Apply temporary mulching or matting. If areas for temporary stabilization are too steep or lack access for effective straw mulch application, apply, upon approval, another effective measure.
Incorporate permanent erosion control f eatures into the Project at the earliest practicable time.
00280.43Area Preparation - Prepare areas according to 01040.48(d) and track -walk all fill slopes
at finished grade steeper than 1V:3H and flatter than 1V:1.5H so that track impressions run parallel to slope contours. Maintain at least 1 3/8-inch tall track grousers.
00280.44Erosion Prevention - Perform Erosion prevention Work as shown and according to the
following:
immediate protection is required and mulching or other methods of Soil stabilization are not feasible. Cover exposed Soil with plastic sheeting as shown. Keep sheeting in place during rain events. Direct Runoff away from areas above plastic sheeting to prevent undermining. Control R unoff from plastic sheeting so water discharges without causing further pollution.
00280.44 236 (1) Chemical Soil Binder - Hydraulically apply a liquid stabilization emulsion at the following rates unless the manufacturer recommends a different rate of application:
• Long -Term Control of Exposed SoilS urfaces - Apply 35 gallons per acre of emulsion. Dilute with water at the rate of one part emulsion to 20 parts water. • Steep Slopes with Raveling Small Rock - Apply 45 gallons per acre of emulsion. Dilute with water at the rate of one part emulsion to 10 parts water.
Erosion according to the following:
• Liquid Stabilizer Emulsions - Dilute the emulsion with water at a rate of one part emulsion to 30 parts water. A pply the diluted mixture at the rate of 865 gallons per acre unless the manufacturer recommends a different rate of application. • Dry Powder Tackifier - Apply at a rate of 140 pounds per acre unless the manufacturer recommends a greater rate of application.
Section 00340.
• Mulching - Evenly apply dry mulch and tackifier materials according to Section 01030. In areas not accessible to heavy Equipment, mulch by hand or by other approved methods. Areas not prepared according to 01040.48(d) will require a greater rate of application to obtain complete coverage, which shall be at no additional cost to the Agency. Seeding - Seed according to Section 01030.
manufacturer's recommendations, whichever is more stringent. Install fully biodegradable matting within 25 feet of water resources.
and remove undulations sufficiently to allow the matting to be placed in complete contact with the Soil.
Section 01030.
specified in Section 01030.
• Hydraulically Applied Matting - Apply seed at double the rate specified in Section 01030. • Manually Applied (Pre -seeded) Rolled Matting - Pre-seed the matting at double the rate specified, with the seed mix specified in Section 01030.
00280.46 237 (4) Bonded Fiber Matrix Matting Placement - Follow the manufacturer's recommended practices to hydraulically apply bonded fiber matrix at the rates shown on the ESCP or as recommended by the manufacturer, whichever is more stringent.
recommendations. Apply compost and tackifier with Equipment that propels the material directly at the Soil surface and achieves direct contact with the Soil . Apply compost at a uniform depth of 2 inches to all exposed Soil surfaces.
in place according to 01030.48(b)(3). Do not use straw bales for any other application unless approved.
00280.45Runoff Controls - Install runoff controls according to the following:
After construction of interceptor dikes and swales, construct temporary stabilization according to 00280.42(b).
00280.46Sediment Controls - Install sediment controls as shown and according to the following:
surfaces. Construct the construction entrances as shown or directed.
Type 10 - curb inlet sediment dam according to manufacturer’s recommendations.
than 48 hours after stream activities are complete.
directed.
00280.47 238 Where location of temporary sediment trap is used post -construction for water quality treatment, storage or infiltration, remove Sediment and soil to a depth of 18” and replace to finish grade w ith material approved by engineer.
Locate concrete wash basins and concrete waste disposal to prevent stormwater that has been in contact with concrete wash or waste concrete from contaminating Waters of the State or stormwater inlets or conveyances. Handle wash water as waste. Do not dispose of concrete wash water or wash out concrete trucks or tools onto the ground, or into storm drains, open ditches, streets, or streams.
Aggregate or as approved by Engineer.
00280.47Work Quality - Comply with 01030.49
00280.48Emergency Materials - Provide, stockpile, and protect emergency materials on-site for
unknown weather or erosion conditions. A list of emergency materials will be provided in the Special Provisions. Replenish emergency materials as they are used.
The emergency materials are in addition to the other erosion control materials required to implement and maintain the ESCP.
Remove all unused emergency materials from the Project site at the completion of the Project.
Maintenance
00280.60General - Maintain installed ESC devices in good working order and Effective Functioning
at all times. Keep the devices in place until the Agency issues notification of acceptance of stabilization. All maintenance and repairs are at no additional cost to the Agency.
00280.61Ineffective Controls - If an ESC device does not meet Effective Functioning, repair,
replace, or provide additional devices. Devices repaired, replaced, or added due to improper installation, insufficient maintenance, or damage from Contractor operations will be made at no additional cost to the Agency.
00280.62Inspection and Monitoring - Inspect the Project Site and all ESC devices for potential
erosion or sediment movem ent on a weekly basis and when 1/2 inch or more of rainfall occurs within a 24 hour period, including weekend and holidays.
If a significant noncompliance or serious water quality issue occurs that could endanger health or the environment, verbally report it to the Engineer within 24 hours.
Control Monitoring Form, and submit the form to the Agency as follows:
• On initial day of construction activity . • Every 14 Days. • 24 hours after any rainfall event or snow melt event that results in runoff, including weekends and holidays. • When directed by the Engineer. 00280.63 239 Include photographs of any BMP that is not functioning or requires maintenance in the inspection report. If all BMPs are functioning as designed, include not less than 4 photos of these BMPs.
For inactive sites or inactive areas within a site, document the dates when work stopped and resumed and identify the location(s) in an ESCP revision. Conduct inspection and monitoring of inactive sites or inactive areas within a site as follows: Not more than 14 days prior to the site becoming inactive to verify BMPs are providing Effective Functioning. Every 14 days for the first month the area is inactive. Once a month thereafter . 24 hours after any rainfall event or snow or ice melt event that results in runoff, including weekends and holidays . When directed by the Engineer. Work may be stopped due to frozen conditions such that the site is stabilized. Resume monitoring every 14 days and within 24 hours of rainfall or melt resulting in runoff when frozen conditions end.
event information may be derived from weather stations that are representative of precipitation levels at the site.
upstream and downstream of locations where surface waters from the constructi on site enter the receiving stream. Describe in the report any apparent differences in color and the clarity of the discharge, and any observable difference in comparison with the receiving stream. Note whether sheen and floating matter are present or ab sent.
If a permit noncompliance or serious water quality issues occur verbally report to the Engineer within 24 hours and submit a written report within 5 Calendar Days.
00280.63Sediment Removal - Remove sediment and upgrade or repair the devices as needed as
soon as practicable, but not later than 2 D ays after the surrounding exposed ground has dried sufficiently to prevent further damage from Equipment needed for repair operations.
If rainfall continues over a 24- hour period, or other circumstances that preclude Equipment operation in the area, hand- carry and install additional ESC devices.
has been reduced by 50 percent. Prevent release of S ediments during maintenance or removal Work .
dams, and sediment traps once it has reached one third of the exposed height of the device or storage depth.
methods that do not transport Sediment -laden water to receiving streams. Remove sediment that has been tracked- out from the Project Site by the end of the same business day. If the sediment track -out occurs on a non-business day, remove the sediment by the end of the next business day.
disturbed by the Contractor's operations or other causes within 2 Calendar Days. 00280.64 240
00280.64Corrective Actions - Initiate corrective actions when the following noncompliance occur:
A discharge from the Project Site causes an exceedance of applicable water quality standards, Sediment or turbidity are visible in discharge from the Project site in conveyance system leading to surface water or at the discharge point within surface water, BMP needs repair or replacement, beyond routine maintenance, BMP shown on ESCP was not installed or installed incorrectly, A prohibited discharge has occurred, When required by DEQ, As directed by Engineer
noncom pliance, including removing discharged material and repairing or replacing BMPs that do not provide Effective Fun ctioning according to the following:
Mobilize resources to clean contaminated surfaces and address cause of discharge, Complete corrective actions by the close of the next business day for discharge clean-up and to restore Effective Functioning of installed BMPs, For more significant noncompliance which requires additional, replacement or modified BMPs to restore Effective Functioning, complete corrective action(s) no later than 24 hours after the discovery • If completion of corrective action is not feasible within 24 hours, document the reasons why the time line cannot be met. • Provide a schedule for clean-up and corrective actions that restores E ffective Functioning as soon as feasible. If schedule cannot be met document the reasons for the delay. • Provide all corrective action documentation and photographs to Agency within 24 hours of completion of corrective actions.
implementations to provide:
The Project Site’s common name and 1200-CA permit identification number when applicable, Conveyance system discharge location(s) and outfalls that were out of compliance, Photographs of the discharge(s) before and after the implementation of corrective actions, or before and after NTU readings of the discharge, The period of noncompliance, Name(s), titles and contact information of personnel conducting inspections, The specific condition and the date and time the noncompliance was identified, Description of the noncompliance and BMP failure(s) that caused the noncompliance, Description of the actions taken to address the noncompliance and prevent a reocc urrence of the noncompliance, Where corrective actions change site conditions from what is shown on ESCP, revise the ESCP to represent the site conditions, Immediately upon completion of corrective action documentation, provide to Agency for signature and submittal to DEQ.
00280.90 241 Finishing and Cleaning Up
00280.70Removal - All temporary erosion and sediment control features that are not incorporated
into the permanent Work remain the property of the Contractor. Within 30 Days of the notification of acceptanc e of Permanent Stabilization, remove temporary erosion and sediment control devices and Materials from the area. Dispose of accumulated Sediment before removing the devices and Materials according to 00280.71. Shape and permanently stabilize areas affected by the removal process. Do not remove temporary erosion and sediment control devices before Permanent Stabilization is accepted. If shown or directed, compost filter material may be dispersed in place. Cut open compost filter socks and dispose of sock material according to 00290.20 .
00280.71Sediment Disposal - Regrade removed Sediment into slopes or remove and dispose
off-site according to 00290.20.
Measurement
00280.80Measurement - The q uantities of Work performed under this Section will be measured
according to the following:
where the device is constructed or placed.
grade of the item or device constructed or placed.
• Flow spreaders and diversion dikes and swales will be measured along the long axis. • Sediment barrier, when measured on the length basis, will be measured along the long axis of the barrier regardless of type. • Temporary slope drains will be measured from the beginning of the metal end pieces to the end of the drain. Measurement will be made when each installation is at its maximum length.
of the surface area actually covered as s hown or as required .
Provisions are included in the items listed in the Contract Schedule of Items.
Payment
00280.90Payment - The accepted quantities of Work performed under this Section will be paid for
at the Contract unit price, per unit of measurement, for the following items: Pay Item Unit of Measurement
Erosion Prevention
00280.90 242 (d) Chemical Soil Binder ............................................................................. Acre
Item (a) includes:
mobilization furnishing, stockpiling, protecting, restocking, and removing emergency Materials preparing Project for a period of extended non-activity inspecting, maintaining, and removing erosion control devices restoring, mulching, tacking, and seeding all disturbed ground, Work, and storage areas not otherwise covered
Partial payments for item (a) will be made as follows:
• When the initial Contractor developed ESCP, narrative, and schedule are complete and accepted, and the initial erosion control devices are installed ............ 25% • When 50 percent of the Contract is complete, excluding advances on Materials ..... 25% • When 75 percent of the Contract is complete, excluding advances on Materials ..... 25% • At completion of the Work covered by this section ................................................... 25% Item (b) includes:
monitoring activities to maintain effective functioning developing, revising and documenting the ESCP monitoring activities to maintain effective function and permit compliance
Item ( c) includes protecting exposed slopes with plastic sheets, anchoring devices, and providing toe protection.
In item ( f), the word "Hydromulch", "Straw", or "Compost" will be inserted in the blank. In items ( g), the type will be inserted in the blank. Item ( g) includes preparing the slope surface and stabilizing exposed Soil with erosion matting Material and bonded fiber matrix matting application. Payment will be payment in full for furnishing and placing all Materials, and for furnishing all Equipment, labor, and Incidentals necessary to complete the Work as specified. No separate or additional payment will be made for:
• constructing and removing temporary slope berms • erosion control for Work outside the construction limits including, but not limited to, Borrow pits, haul roads, disposal sites, and Equipment st orage sites modifications or additions to the ESCP
00280.91 243 No separate or additional payment will be made for constructing laps, seams, joints, wraps, overlaps, joint overlaps, or patches unless the Engineer orders additional amounts in excess of the minimum. For laps, wraps, or overlaps that that have been ordered by the Engineer and exceed the minimum or specified length or width, payment will be made for the added lap, overlap, or wrap length or width at the Contract unit price.
Water used for non-chemical dust control will be paid according to Section 00340. Additional ESC devices required for permit compliance will be paid for according to 00195.20.
00280.91Payment - The accepted quantities of Work performed under this Section will be pai d for
at the Contract unit price, per unit of measurement, for the following items: Runoff and Sediment Control
In items ( a), (f), (g), (j), and ( k), the type will be inserted in the blank.
Items ( a), (j), and ( k) includes the biofilter bags, sand bags, and sediment fence as applicable. Emergency Materials that are incorporated into the Project will be paid for under the appropriate items listed in the Contract Schedule of Items.
Payment will be payment in full for furnishing and placing all Materials, and for furnishing all Equipment , labor, and Incidentals necessary to complete the Work as specified. No separate or additional payment will be made for:
• constructing and removing temporary slope berms • erosion control for Work outside the construction limits including, but not limited to, Borrow pits, haul roads, disposal sites, and Equipment storage sites
No separate or additional payment will be made for constructing laps, seams, joints, wraps, overlaps, joint overlaps, or patches unless the Engineer orders additional amounts in excess of the minimum. For laps, wraps, or overlaps that that have been ordered by the Engineer and exceed the minimum or specified length or width, payment will be made for the added lap, overlap, or wrap length or width at the Contract unit price.
Water used for non- chemical dust control will be paid according to Section 00340.