31_32_11_Amd03.pdf

C-17 Type III Fuel System & Ramp Expansion FJRP159073 145th Airlift Wing, North Carolina Air National Guard

Section 31 32 11 Page 1

SECTION 31 32 11

SOIL SURFACE EROSION CONTROL

08/08

PART 1 GENERAL

1.1 SUMMARY

The work consists of furnishing and installing temporary and permanent soil surface erosion control materials to prevent the pollution of air, water, and land, including fine grading, blanketing, stapling, mulching, vegetative measures, structural measures, and miscellaneous related work, within project limits and in areas outside the project limits where the soil surface is disturbed from work under this Contract at the designated locations. This work includes all necessary materials, labor, supervision and equipment for installation of a complete system. Submit a listing of equipment to be used for the application of erosion control materials.

Coordinate this Section with the requirements of Section 31 00 00 EARTHWORK and Section 32 92 19 SEEDING. Complete backfilling the openings in synthetic grid systems and articulating cellular concrete block systems a maximum 7 days after placement to protect the material from ultraviolet radiation.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM D1248 (2012) Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable

ASTM D1777 (1996; E 2011; R 2011) Thickness of Textile Materials

ASTM D3776 (2009a; R 2013) Standard Test Method for Mass Per Unit Area (Weight) of Fabric

ASTM D3787 (2016) Bursting Strength of Textiles - Constant-Rate-of-Traverse (CRT), Ball Burst Test

ASTM D3884 (2009; R 2013; E 2014) Abrasion Resistance of Textile Fabrics (Rotary Platform, Double-Head Method)

ASTM D4355 (2014) Deterioration of Geotextiles from Exposure to Light, Moisture and Heat in a Xenon-Arc Type Apparatus

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Section 31 32 11 Page 2

ASTM D4491 (2015) Standard Test Methods for Water Permeability of Geotextiles by Permittivity

ASTM D4533 (2015) Standard Test Method for Trapezoid Tearing Strength of Geotextiles

ASTM D4632 (2015a) Grab Breaking Load and Elongation of Geotextiles

ASTM D4751 (2016) Standard Test Method for Determining Apparent Opening Size of a Geotextile

ASTM D4833 (2007; E 2013; R 2013) Index Puncture Resistance of Geotextiles, Geomembranes, and Related Products

ASTM D4972 (2013) pH of Soils

ASTM D5268 (2013) Topsoil Used for Landscaping Purposes

ASTM D5852 (2000; R 2007; E 2014) Standard Test Method for Erodibility Determination of Soil in the Field or in the Laboratory by the Jet Index Method

ASTM D6629 (2001; E 2012; R 2012) Selection of Methods for Estimating Soil Loss by Erosion

U.S. GREEN BUILDING COUNCIL (USGBC)

LEED GBDC Ref Guide (2009; R 2010) LEED Reference Guide for Green Building Design, Construction and Major Renovations of Commercial and Institutional Buildings including Core & Shell and K-12 Projects

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. Submittals with an "S" are for inclusion in the Sustainability Notebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-01 Preconstruction Submittals

Work Sequence Schedule; G

Erosion Control Plan; G

SD-02 Shop Drawings

Layout

Obstructions Below Ground; G

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Section 31 32 11 Page 3

Maintenance Record

SD-03 Product Data

Local/Regional Materials

Biobased Materials

Recycled Plastic

Mulch Control Netting and Filter Fabric

Hydraulic Mulch; G

Erosion Control Blankets Type XI

Geotextile Fabrics; G

Equipment

Finished Grade

Erosion Control Blankets

Submit manufacturer's literature including physical characteristics, application and installation instructions.

Documentation indicating percentage of post-industrial and post-consumer recycled content per unit of product. Indicate relative dollar value of recycled content products to total dollar value of products included in Project.

SD-04 Samples

In addition to the samples, submit certification of recycled content or Statement of recycled content. Also submit certification of origin including the name, address and telephone number of manufacturer.

Geosynthetic Binders

1 quart

Mulch

2 pounds

Hydraulic Mulch

2 pounds

Geotextile Fabrics

6 inch square

Erosion Control Blankets

6 inch square

Section 31 32 11 Page 4

Synthetic Grid Systems

One sample grid

Articulating Cellular Concrete Block Systems

100 square feet area sample and two color charts displaying the colors and finishes.

SD-06 Test Reports

Geosynthetic Binders

Hydraulic Mulch

Geotextile Fabrics

Erosion Control Blankets

Synthetic Grid Systems

Articulating Cellular Concrete Block Systems

SD-07 Certificates

Fill Material

Mulch

Hydraulic Mulch

Geotextile Fabrics

Geosynthetic Binders

Synthetic Soil Binders

Installer's Qualification

Recycled Plastic

Wood By-Products

Wood Cellulose Fiber

SD-10 Operation and Maintenance Data

Maintenance Instructions; G

1.4 QUALITY ASSURANCE

1.4.1 Installer's Qualification

The installer shall be certified by the manufacturer for training and experience installing the material. Submit the installer's company name and address, and/or certification.

Section 31 32 11 Page 5

1.4.2 Erosion Potential

Assess potential effects of soil management practices on soil loss in accordance with ASTM D6629. Assess erodibility of soil with dominant soil structure less than 2.8 to 3.1 inches in accordance with ASTM D5852.

1.4.3 Substitutions

Substitutions will not be allowed without written request and approval from the Contracting Officer.

1.4.4 SUSTAINABLE DESIGN REQUIREMENTS

1.4.4.1 Local/Regional Materials

Use materials or products extracted, harvested, or recovered, as well as manufactured, within a 500 mile radius from the Project Site, if available from a minimum of three sources. See Section 01 33 29 SUSTAINABILITY REPORTING for cumulative total local material requirements. Erosion control materials may be locally available. Submit LEED documentation relative to local/regional materials credit in accordance with LEED GBDC Ref Guide.

Submit documentation indicating distance between manufacturing facility and the Project Site. Indicate distance of raw material origin from the Project Site. Indicate relative dollar value of local/regional materials to total dollar value of products included in Project.

1.4.4.2 Biobased Materials

Use biobased materials when feasible and as specified. Submit documentation indicating type of biobased material in product and biobased content.

1.5 DELIVERY, STORAGE, AND HANDLING

Prior to delivery of materials, submit certificates of compliance attesting that materials meet the specified requirements. Store materials in designated areas and as recommended by the manufacturer protected from the elements, direct exposure, and damage. Do not drop containers from trucks.

Material shall be free of defects that would void required performance or warranty. Deliver geosynthetic binders and synthetic soil binders in the manufacturer's original sealed containers and stored in a secure area.

a. Furnish erosion control blankets and geotextile fabric in rolls with suitable wrapping to protect against moisture and extended ultraviolet exposure prior to placement. Label erosion control blanket and geotextile fabric rolls to provide identification sufficient for inventory and quality control purposes.

b. All synthetic grids, synthetic sheets, and articulating cellular concrete block grids shall be sound and free of defects that would interfere with the proper placing of the block or impair the strength or permanence of the construction. Minor cracks in synthetic grids and concrete cellular block, incidental to the usual methods of manufacture, or resulting from standard methods of handling in shipment and delivery, will not be deemed grounds for rejection.

Section 31 32 11 Page 6

c. Inspect seed upon arrival at the jobsite for conformity to species and quality. Seed that is wet, moldy, or bears a test date five months or older, shall be rejected.

1.6 SCHEDULING

Submit a construction work sequence schedule, with the approved erosion control plan a minimum of 30 days prior to start of construction. The work schedule shall coordinate the timing of land disturbing activities with the provision of erosion control measures to reduce on-site erosion and off-site sedimentation. Coordinate installation of temporary erosion control features with the construction of permanent erosion control features to assure effective and continuous control of erosion, pollution, and sediment deposition. Include a vegetative plan with planting and seeding dates and fertilizer, lime, and mulching rates. Distribute copies of the work schedule and erosion control plan to site subcontractors. Address the following in the erosion control plan:

a. Statement of erosion control and stormwater control objectives.

b. Description of temporary and permanent erosion control, stormwater control, and air pollution control measures to be implemented on site.

c. Description of the type and frequency of maintenance activities required for the chosen erosion control methods.

d. Comparison of proposed post-development stormwater runoff conditions with predevelopment conditions.

1.7 WARRANTY

Erosion control material shall have a warranty for use and durable condition for project specific installations. Temporary erosion control materials shall carry a minimum eighteen month warranty. Permanent erosion control materials shall carry a minimum three year warranty.

PART 2 PRODUCTS

2.1 RECYCLED PLASTIC

Submit individual component and assembled unit structural integrity test results; creep tolerance; deflection tolerance; and vertical load test results and Life-cycle durability. Recycled plastic shall contain a minimum 85 percent of recycled post-consumer product. Recycled material shall be constructed or manufactured with a maximum 1/4 inch deflection or creep in any member, according to ASTM D1248. The components shall be molded of ultraviolet (UV) and color stabilized polyethylene. The material shall consist of a minimum 75 percent plastic profile of high-density polyethylene, low-density polyethylene, and polypropylene raw material. The material shall be non-toxic and have no discernible contaminates such as paper, foil, or wood. The material shall contain a maximum 3 percent air voids and shall be free of splinters, chips, peels, buckling, and cracks.

Material shall be resistant to deformation from solar heat gain.

2.2 MULCH

Section 31 32 11 Page 7

2.2.1 Mulch Control Netting and Filter Fabric

Mulch control netting and filter fabric may be constructed of lightweight recycled plastic, cotton, or paper or organic fiber. The recycled plastic shall be a woven or nonwoven polypropylene, nylon, or polyester containing stabilizers and/or inhibitors to make the fabric resistant to deterioration from UV, and with the following properties:

Minimum grab tensile strength (TF 25

#1/ASTM D4632)

180 pounds

Minimum Puncture (TF 25 #4/ASTM D3787) 75 psi in the weakest direction

Apparent opening sieve size minimum 40 and maximum 80 (U.S. Sieve Size)

Minimum Trapezoidal tear strength (TF

25 #2/ASTM D4533)

50 pounds

2.3 GEOTEXTILE FABRICS

Geotextile fabrics shall be woven of polyester filaments formed into a stable network so that the filaments retain their relative position to each other. See Section 01 33 29 SUSTAINABILITY REPORTING for cumulative total recycled content requirements. Geotextile fabric may contain post-consumer or post-industrial recycled content. Sewn seams shall have strength equal to or greater than the geotextile itself. Install fabric to withstand maximum velocity flows as recommended by the manufacturer. The geotextile shall conform to the following minimum average roll values:

Property Performance Test Method

Weight 264 g/m2 ASTM D3776

Thickness 0.635 mm ASTM D1777

Permeability 0.12 cm/sec ASTM D4491

Abrasion Resistance, Type (percent strength retained)

58 percent X 81 percent ASTM D3884

Tensile Grab Strength 1467 N X 1933 N ASTM D4632

Grab Elongation 15 percent X 20 percent ASTM D4632

Burst Strength 5510 kN/m2 ASTM D3787

Puncture Strength 733 N ASTM D4833

Trapezoid Tear 533 N X 533 N ASTM D4533

Apparent Opening Size 40 US Std Sieve ASTM D4751

UV Resistance @ 500 hours 90 percent ASTM D4355

Section 31 32 11 Page 8

2.4 EROSION CONTROL BLANKETS

2.4.1 Erosion Control Blankets Type I

Use Type I blankets for erosion control and vegetation establishment on roadside embankments, abutments, berms, shoulders, and median swales where natural vegetation will provide long term stabilization. Erosion control blankets shall be a machine-produced mat of 100 percent straw. The blanket shall be of consistent thickness with the straw evenly distributed over the entire area of the mat. Cover the blanket on the top side with a photodegradable polypropylene netting having an approximate 1/2 by 1/2 inch mesh and be sewn together on a maximum 1.5 inch centers with degradable thread. The erosion control blanket shall have the following properties:

Material Content

Straw 100 percent with approximately 0.50 lb/yd2 weight

Netting One side only, lightweight photodegradable with approximately 1.64 lb/1,000 ft2 weight

Thread Degradable

Note 1: Photodegradable life a minimum of 2 months with a minimum 90 percent light penetration. Apply to slopes up to a maximum 3:1 gradient.

2.4.2 Erosion Control Blankets Type II

Erosion control blankets shall be a machine-produced mat of 100 percent straw. The blanket shall be of consistent thickness with the straw evenly distributed over the entire area of the mat. Cover the blanket on the top side with a polypropylene netting having an approximate 1/2 by 1/2 inch mesh with photodegradable accelerators to provide breakdown of the netting within approximately 45 days, depending upon geographic location and elevation.

Sew the blanket together on a maximum 1.5 inch centers with degradable thread. The erosion control blanket shall have the following properties:

Material Content

Straw 100 percent with approximately 0.50 lb/yd2 weight

Netting One side only, lightweight photodegradable with photo accelerators and approximately 1.64 lb/1,000 ft2 weight

Thread Degradable

Note 1: Photodegradable life a minimum of 10 months with a minimum 90 percent light penetration. Apply to slopes up to a maximum 3:1 gradient.

2.4.3 Erosion Control Blankets Type IV

Erosion control blanket shall be a machine-produced mat of 100 percent straw. The blanket shall be of consistent thickness with the straw evenly distributed over the entire area of the mat. Cover the blanket on the top

Section 31 32 11 Page 9 and bottom sides with lightweight photodegradable polypropylene netting having an approximate 1/2- by 1/2-inch mesh. Sew the blanket together on

1.5 inch centers with degradable thread. The erosion control blanket shall have the following properties:

Material Content

Straw 100 percent with approximately 0.50 lb/yd2 weight

Netting Both sides lightweight photodegradable with approximately 1.64 lb/1,000 ft2 weight.

Thread Degradable

Note: Photodegradable life a minimum of 2 months with a minimum 90 percent light penetration. Apply to slopes with a gradient of less than 1.5:1.

2.4.4 Erosion Control Blankets Type V

Erosion control blanket shall be a machine-produced mat of 100 percent straw. The blanket shall be of consistent thickness with the straw evenly distributed over the entire area of the mat. Cover the blanket on the top side with polypropylene netting having an approximate 1/2- by 1/2-inch mesh with photodegradable accelerators to provide breakdown of the netting within approximately 45 days, depending upon geographic location and elevation.

Cover the bottom with a polypropylene netting having an approximate 1/2 by 1/2 inch mesh with photo accelerators. Sew the blanket together on 1.5 inch centers with degradable thread. The erosion control blanket shall have the following properties:

Material Content

Straw 70 percent by approximately 0.35 lb/yd2

Top side lightweight photodegradable with photo accelerators with approximately 1.64 lb/1,000 ft2 weight

Netting

Bottom side lightweight photodegradable with photo accelerators and approximately 1.64 lb/1,000 ft2 weight

NOTE: Photodegradable life a minimum of 10 months with a minimum 90 percent light penetration. Apply to slopes up to a maximum 2:1 gradient.

2.4.5 Erosion Control Blankets Type VI

Erosion control blanket shall be a machine-produced 100 percent biodegradable mat with a 100 percent straw fiber matrix. The blanket shall be of consistent thickness with the straw fiber evenly distributed over the entire area of the mat. Cover the blanket on the top side with a 100 percent biodegradable woven natural organic fiber netting. The netting shall consist of machine directional strands formed from two intertwined

Section 31 32 11 Page 10 yarns with cross directional strands interwoven through the twisted machine strands (commonly referred to as a Leno weave) to form an approximate 1/2-by 1/2-inch mesh. Sew the blanket together with biodegradable thread on 1.5 inch centers. The erosion control blanket shall have the following properties:

Material Content

Matrix 100 percent straw fiber with approximately 0.50 lb/yd2 weight

Netting One side only, Leno woven 100 percent biodegradable natural organic fiber

Weight approximately 9.3 lb/1,000 ft

Thread Biodegradable

NOTE: Photodegradable life a minimum of 10 months with a minimum 90 Percent light penetration. Apply to slopes up to a maximum 2:1 gradient.

2.4.6 Erosion Control Blankets Type VII

Erosion control blanket shall be a machine-produced 100 percent biodegradable mat with an herbaceous straw fiber matrix. The blanket shall be of consistent thickness with the straw evenly distributed over the entire area of the mat. Cover the blanket on the top and bottom sides with 100 percent biodegradable woven natural fiber netting. The netting shall consist of machine directional strands formed from two intertwined yarns with cross directional strands interwoven through the twisted machine strands (commonly referred to as a Leno weave) to form an approximate 1/2-by 1/2-inch mesh. Sew the blanket together with biodegradable thread on 1.5 inch centers. The blanket shall have the following properties:

Material Content

Straw 100 percent straw fiber with approximately 0.50 lb/yd2 weight

Netting Top and bottom sides,Leno woven 100 percent biodegradable natural organic fiber with approximately 9.3 lb/1,000ft2 weight

Thread Biodegradable

Note: Photodegradable life a minimum of 18 months with a minimum 90 percent light penetration. Apply to slopes up to a maximum 1.5:1 gradient.

2.4.7 Erosion Control Blankets Type XII (Compost Mat)

Compost blanket shall consist of a layer of 100 percent biobased stable and mature compost uniformly distributed to a depth of 3/4 to 3 inches along slopes with erosion potential. Compost shall encourage plant growth and

Section 31 32 11 Page 11 seed shall be applied following compost application. The blanket shall have the following properties:

Parameter Range

Particle size 3/8-1/2 inch sieve and 2-3 inch sieve (ratio = 3:1)

Moisture content 20 - 50 percent

Soluble salt 3.0 - 6.0 mmhos/cm

Organic matter 40 - 70 percent pH 6.0 - 8.0

Nitrogen content 0.5 - 2.0 percent

Human made inerts 0.0 - 1.0 percent

2.4.8 Seed

Seed shall comply with Specification Section 32 92 19 SEEDING.

2.4.9 Staking

Stakes shall be 100 percent biodegradable manufactured from recycled plastic or wood and shall be designed to safely and effectively secure erosion control blankets for temporary or permanent applications. The biodegradable stake shall be fully degradable by biological activity within a reasonable time frame. The bio-plastic resin used in production of the biodegradable stake shall consist of polylactide, a natural, completely biodegradable substance derived from renewable agricultural resources. The biodegradable stake must exhibit ample rigidity to enable being driven into hard ground, with sufficient flexibility to resist shattering. Serrate the biodegradable stake on the leg to increase resistance to pull-out from the soil.

2.4.10 Staples

Staples shall be as recommended by the manufacturer.

2.5 COMPOST FILTER BERMS

Compost berms shall consist of 100 percent biobased windrow-shaped compost piles arranged across slopes. Berms shall have the following properties:

Parameter Range

Particle size 3/8-1/2 inch sieve and 2-3 inch sieve (ratio = 1:1)

Moisture content 20 - 50 percent

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Section 31 32 11 Page 12

Parameter Range

Soluble salt 4.0 - 6.0 mmhos/cm

Organic matter 40 - 70 percent pH 6.0 - 8.0

Nitrogen content 0.5 - 2.0 percent

Human made inerts 0.0 - 1.0 percent

Size 1 - 2 feet H x 2.5 - 4 feet W

2.6 WATER

Unless otherwise directed, water is the responsibility of the Contractor.

Water shall be potable or supplied by an existing irrigation system.

PART 3 EXECUTION

3.1 WEATHER CONDITIONS

Perform erosion control operations under favorable weather conditions; when excessive moisture, frozen ground or other unsatisfactory conditions prevail, the work shall be stopped as directed. When special conditions warrant a variance to earthwork operations, submit a revised construction schedule for approval. Do not apply erosion control materials in adverse weather conditions which could affect their performance.

3.1.1 Finished Grade

Provide condition of finish grade status prior to installation, location of underground utilities and facilities. Verify that finished grades are as indicated on the drawings; complete finish grading and compaction in accordance with Section 31 00 00 EARTHWORK, prior to the commencement of the work. Verify and mark the location of underground utilities and facilities in the area of the work. Repair damage to underground utilities and facilities at the Contractor's expense.

3.1.2 Placement of Erosion Control Blankets

Before placing the erosion control blankets, ensure the subgrade has been graded smooth; has no depressed, void areas; is free from obstructions, such as tree roots, projecting stones or other foreign matter. Verify that mesh does not include invasive species. Vehicles will not be permitted directly on the blankets.

3.2 SITE PREPARATION

3.2.1 Soil Test

Test soil in accordance with ASTM D5268 and ASTM D4972 for determining the particle size and mechanical analysis. Sample collection onsite shall be

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Section 31 32 11 Page 13 random over the entire site. The test shall determine the soil particle size as compatible for the specified material.

3.2.2 Layout

Submit scale drawings defining areas to receive recommended materials as required by federal, state or local regulations. Erosion control material locations may be adjusted to meet field conditions. When soil tests result in unacceptable particle sizes, submit a shop drawing indicating the corrective measures.

3.2.3 Protecting Existing Vegetation

When there are established lawns in the work area, the turf shall be covered and/or protected or replaced after construction operations. Identify existing trees, shrubs, plant beds, and landscape features that are to be preserved on site by appropriate tags and barricade with reusable, high-visibility fencing along the dripline. Mitigate damage to existing trees at no additional cost to the Government. Damage shall be assessed by a state certified arborist or other approved professional using the National Arborist Association's tree valuation guideline.

3.2.4 Obstructions Below Ground

When obstructions below ground affect the work, submit shop drawings showing proposed adjustments to placement of erosion control material for approval.

3.3 INSTALLATION

Immediately stabilize exposed soil using fabric, and seed. Stabilize areas for construction access immediately as specified in the paragraph Construction Entrance. Install principal sediment basins and traps before any major site grading takes place. Provide additional sediment traps and sediment fences as grading progresses. Provide inlet and outlet protection at the ends of new drainage systems. Remove temporary erosion control measures at the end of construction and provide permanent seeding.

3.3.1 Construction Entrance

Provide as indicated on drawings, a minimum of 6 inches thick, at points of vehicular ingress and egress on the construction site. Construction entrances shall be cleared and grubbed, and then excavated a minimum of 3 inches prior to placement of the filter fabric and aggregate. The aggregate shall be placed in a manner that will prevent damage and movement of the fabric. Place fabric in one piece, where possible. Overlap fabric joints a minimum of 12 inches.

3.3.2 Compost Filter Berms

Place compost filter berm uncompacted on bare soil as indicated on drawings, parallel to base of slope, and according to manufacturer recommendations.

Place second berm in the same manner at top of slope parallel to first berm.

When no longer required, berm material may be left to decompose naturally, or distributed over an adjacent area for use as a soil amendment or ground cover.

Section 31 32 11 Page 14

3.3.3 Seeding

When seeding is required prior to installing mulch on synthetic grid systems verify that seeding will be completed in accordance with Sections 31 00 00 EARTHWORK and 32 92 19 SEEDING.

3.3.4 Mechanical Anchor

Mechanical anchor shall be a V-type-wheel land packer; a scalloped-disk land packer designed to force mulch into the soil surface; or other suitable equipment.

3.3.5 Hydraulic Mulch Application

3.3.6 Erosion Control Blankets

a. Install erosion control blankets as indicated and in accordance with manufacturer's recommendations. The extent of erosion control blankets shall be as indicated.

b. Orient erosion control blankets in vertical strips and anchored with staples, as indicated. Abut adjacent strips to allow for installation of a common row of staples. Overlap horizontal joints between erosion control blankets sufficiently to accommodate a common row of staples with the uphill end on top.

c. Where exposed to overland sheet flow, locate a trench at the uphill termination. Staple the erosion control blanket to the bottom of the trench. Backfill and compact the trench as required.

d. Where terminating in a channel containing an installed blanket, the erosion control blanket shall overlap installed blanket sufficiently to accommodate a common row of staples.

3.3.7 Articulating Cellular Concrete Block System Installation

3.3.7.1 Seeding, Fertilizing, Mulching

Install seed in accordance with Section 32 92 19 SEEDING.

3.4 CLEAN-UP

Dispose of excess material, debris, and waste materials offsite at an approved landfill or recycling center. Clear adjacent paved areas.

Immediately upon completion of the installation in an area, protect the area against traffic or other use by erecting barricades and providing signage as required, or as directed. Signage shall be in accordance with Section 10 14

00.20 INTERIOR/EXTERIOR SIGNAGE.

3.5 MAINTENANCE RECORD

Furnish a record describing the maintenance work performed, record of measurements and findings for product failure, recommendations for repair, and products replaced.

3.5.1 Maintenance

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Section 31 32 11 Page 15

Maintenance shall include eradicating weeds; protecting embankments and ditches from surface erosion; maintaining the performance of the erosion control materials and mulch; protecting installed areas from traffic.

3.5.2 Maintenance Instructions

Furnish written instructions containing drawings and other necessary information, describing the care of the installed material; including, when and where maintenance should occur, and the procedures for material replacement. Submit instruction for year-round care of installed material.

Include manufacturer supplied spare parts.

3.5.3 Patching and Replacement

Unless otherwise directed, material shall be placed, seamed or patched as recommended by the manufacturer. Remove material not meeting the required performance as a result of placement, seaming or patching from the site.

Replace the unacceptable material at no additional cost to the Government.

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