Amendment 0003 Revisions - Construction Specification 6.pdf

6–1(210–VI–NEH, January 2014)

1. Scope The work consists of preparing the area for treatment; furnishing and placing seed, sprigs, mulch, fertilizer, inocu-lant, lime, and other soil amendments; and anchoring mulch in designated areas as specified.

The following BioPreferred® product categories are applicable to this specification:

— mulch and compost materials

— erosion control materials

— fertilizers

— agricultural spray adjuvants

2. Material Seed—All seed shall conform to the current rules and regulations of the state where it is being used and shall be from the latest crop available. It shall meet or exceed the standard for purity and germination listed in section 7.

Seed shall be labeled in accordance with the state laws and the U.S. Department of Agriculture rules and regula-tions under the Federal Seed Act in effect on the date of invitations for bids. Bag tag figures are evidence of purity and germination. No seed will be accepted with a test date of more than 9 months before the delivery date to the site.

Seed that has become wet, moldy, or otherwise damaged in transit or storage will not be accepted. The percent of noxious weed seed allowable shall be as defined in the current State laws relating to agricultural seeds. Each type of seed shall be delivered in separate sealed containers and fully tagged unless exception is granted in writing by the contracting officer.

Fertilizer—Unless otherwise specified, the fertilizer shall be a commercial grade fertilizer. It shall meet the standard for grade and quality specified by State law. Where fertilizer is furnished from bulk storage, the contrac-tor shall furnish a supplier's certification of analysis and weight. When required by the contract, a representative sample of the fertilizer shall be furnished to the contracting officer for chemical analysis.

Inoculants—The inoculant for treating legume seeds shall be a pure culture of nitrogen-fixing bacteria prepared specifically for the species and shall not be used later than the date indicated on the container or as otherwise specified. A mixing medium, as recommended by the manufacturer, shall be used to bond the inoculant to the seed.

Two times the amount of the inoculant recommended by the manufacturer shall be used except four times the amount shall be used when seed is applied using a hydraulic seeder. Seed shall be sown within 24 hours of treat-ment and shall not remain in the hydraulic seeder longer than 4 hours.

Lime and other soil amendments—Lime shall consist of standard ground agriculture limestone, or approved equiv-alent. Standard ground agriculture limestone is defined as ground limestone meeting current requirements of the State Department of Agriculture. Other soil amendments shall meet quality criteria and application requirements specified in section 7.

Mulch tackifiers—Asphalt emulsion tackifiers shall conform to the requirements of ASTM D 977, Specification for Emulsified Asphalt. The emulsified asphalt may be rapid setting, medium setting, or slow setting. Nonasphaltic tackifiers required because of environmental considerations shall be as specified in section 7.

Straw mulch material—Straw mulch shall consist of wheat, barley, oat or rye straw, hay, grass cut from native grasses, or other plants as specified in section 7. The mulch material shall be air-dry, reasonably light in color, and shall not be musty, moldy, caked, or otherwise of low quality. The use of mulch that contains noxious weeds is not permitted. The contractor shall provide a method satisfactory to the contracting officer for determining weight of mulch furnished.

Construction Specification 6—Seeding, Sprigging, and Mulching

6–2 (210–VI–NEH, January 2014)

Other mulch materials—Mulching materials, such as wood cellulose fiber mulch, mulch tackifiers, synthetic fiber mulch, netting, and mesh, are other mulching materials that may be required for specialized locations and conditions. These materials, when specified, must be accompanied by the manufacturer's recommendations for methods of application.

3. Seeding mixtures, sod, sprigs, and dates of planting The application rate per acre for seed mixtures, sprigs, or sod and date of seeding or planting shall be as shown on the plans or as specified in section 7.

4. Seedbed preparation and treatment Areas to be treated shall be dressed to a smooth, firm surface. On sites where equipment can operate on slopes safely, the seedbed shall be adequately loosened (4 to 6 inches deep) and smoothed. Depending on soil and mois-ture conditions, disking or cultipacking, or both, may be necessary to properly prepare a seedbed. Where equip-ment cannot operate safely, the seedbed shall be prepared by hand methods by scarifying to provide a roughened soil surface so that broadcast seed will remain in place.

If seeding is to be accomplished immediately following construction operations, seedbed preparation may not be required except on a compacted, polished, or freshly cut soil surface.

Rocks larger than 6 inches in diameter, trash, weeds, and other debris that will interfere with seeding or mainte-nance operations shall be removed or disposed of as specified in section 7.

Seedbed preparation shall be discontinued when soil moisture conditions are not suitable for the preparation of a satisfactory seedbed as determined by the contracting officer's technical representative (COTR).

5. Seeding, sprigging, fertilizing, mulching, and stabilizing All seeding or sprigging operations shall be performed in such a manner that the seed or sprigs are applied in the specified quantities uniformly in the designated areas. The method and rate of seed application shall be as specified in section 7. Unless otherwise specified, seeding or sprigging shall be accomplished within 2 days after final grading is completed and approved.

Fertilizer, lime, and other soil amendments shall be applied as specified in section 7. When specified, the fertilizer and soil amendments shall be thoroughly incorporated into the soil immediately following surface application.

The rate, amount, and kind of mulching or mesh shall be as specified in section 7. Mulches shall be applied uni-formly to the designated areas. They shall be applied to areas seeded not later than 2 working days after seeding has been performed. Straw mulch material shall be stabilized within 24 hours of application using a mulch crimper or equivalent anchoring tool or by a suitable tackifier. When the mulch crimper or equivalent anchoring tool is used, it shall have straight blades and be the type manufactured expressly for and capable of firmly punching the mulch into the soil. Where the equipment can be safely operated, it shall be operated on the contour. Hand methods shall be used where equipment cannot safely operate to perform the work required.

The tackifier shall be applied uniformly over the mulch material at the specified rate, or it shall be injected into the mulch material as it is being applied. Mesh or netting stabilizing materials shall be applied smoothly, but loosely on the designated areas. The edges of these materials shall be buried or securely anchored using spikes or staples as specified in section 7.

The contractor shall maintain the mesh or netting areas until all work under the contract has been completed and accepted. Maintenance shall consist of the repair of areas damaged by water erosion, wind, fire, or other causes.

Such areas shall be repaired to reestablish the intended condition and to the design lines and grades required by the contract. The areas shall be refertilized, reseeded, and remulched before the new application of the mesh or netting.

6–3(210–VI–NEH, January 2014)

6. Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, each area treated is measured as specified in section 7 and the area calculated to the nearest 0.1 acre. Payment for treatment is made at the contract unit price for the designated treatment, which will constitute full compensation for completion of the work.

When specified as an item of work, mesh or netting is measured to the nearest square yard of surface area covered and accepted. Payment is made at the contract unit price and will constitute full compensation for completion of the work.

Method 2—For items of work for which specific lump sum prices are established in the contract, the quantity of work will not be measured for payment. Payment for this item is made at the contract lump sum price for the item and will constitute full compensation for the completion of the work.

Method 3—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds. Progress payments will be determined as specified in section 7. Payment of the lump sum contract price will constitute full compensation for completion of the work.

All Methods—The following provisions apply to all methods of measurement and payment. Compensation for any item of work described in the contract, but not listed in the bid schedule is included in the payment for the item of work to which it is made subsidiary. Such items and the item(s) to which they are made subsidiary are identified in section 7.

7. Items of work and construction details

7. Items of work to be performed in conformance with this specification and the construction details therefore are:

1. Item of work 003 shall consist of all work and materials necessary to install all permanent and temporary seeding for the project.

a) Mow field 3 (~16 acres) and apply the first of two herbicide burndown treatments as per Job Sheet PA 315 prior to beginning excavation.

b) When grading is finished, apply lime and fertilizer in accordance with soil test recommendations. If soil test results are not available, apply 6,000 lbs. of agricultural grade limestone and fertilize at the rate of 100 lbs. 10-20-20 or equivalent, per acre.

c) Permanently seed ditch plugs and pothole berms with the following mix and install double matted erosion control fabric as per manufactures recommendations after seeding.

Tall Fescue 40 lbs/acre

Red Fine Fescue 10lbs/acre Perennial Ryegrass 25lbs/acre

Cereal Grain 1 bushel/acre

d) Temporary seeding must be done on all remaining disturbed areas. Seeding shall be done immediately after completion of the pothole excavation and spoil area placement, as per the directions below:

a. Area to be seeded shall be measured by the contractor.

b. After finished grading, Cereal Rye shall be applied with a broadcast seeder or drilled.

Ponding areas will not need to be temporary seeded (~2.0 ac). The following rates shall be followed:

Cereal Rye 50 bushel/acre

c. Area shall be mulched with straw (3 ton/acre) following temporary seeding.

e) Permanent seeding of the area around the potholes shall be as per Job Sheet PA 420c –

Wetland Mix. The large spoil pile should be seeded as per Job Sheet PA 420a Job – Wet Site Mix

f) A second herbicide burndown treatment/site preparation will be done on the remaining undisturbed areas in field 3. Refer to Job Sheet PA 315.

g) Permanent seeding of the herbicide treated area shall be as per Job Sheets PA 420a – Wet Site Mix and PA 420b – Upland Mix.

*All seeding is to be used upon availability and any substitutions must be approved by NRCS inspector prior to selection and planting.

a. Temporary and permanent seeding and mulching of the disturbed areas (pothole berm, spoil area, ditch plugs access lanes, etc) shall be done immediately after excavation is completed. Disturbed areas shall not be left unseeded for more than 21 days.

Permanent

(210-VI-NEH, January 2014) 6-4 seeding (items e & g) shall be done between November and May 1st as noted in the PA

420 Job Sheets.

c. Contractor to provide invoices or tags for all seedings for final verification.

Invoices/tags to designate plant species and number/amount.

d. Payment for this work item will be lump sum upon completion of all seeding, mulching, and all other work items as per method 2.

2. Item of work 004 shall consist of all work and materials necessary to install and maintain all tree and Shrub plantings through the first year of planting

a) Tree and Shrub Preparation shall be as per Job Sheet PA 490 and not as per section 4 (Seedbed preparation and treatment). Shrubs and Trees Establishment shall be as per Job Sheet PA 612a and Job Sheet PA 612b respectively (not as per section 5). Tree and Shrub planting shall take place when the ground is free of heavy frost till the end of April.

b) Trees and Shrubs to be watered in.

c) Trees and shrubs must come from within a 75 miles radius of the site. Written justification must be provided to and approved by the COR in order to go beyond this distance.

d) Year 1 maintenance of trees and shrubs shall be as per Job Sheets 612a and 612b. Year 1 is the growing season after which trees and shrubs are planted.

e) The contractor is to maintain no more than 30% mortality of tree and shrubs. Contractor will not be held to extenuating circumstances such as extreme drought or flooding.

f) Payment for this work item will be lump sum upon completion of all tree/shrub establishment as per method 2.

3. Item of work 008 shall consist of maintenance of permanent seeding and tree/shrub plantings for the second year growing season after planting.

a) Area to be included in maintenance includes all permanently seeded areas and all tree & shrub plantings.

b) Refer to Job Sheets 612a and 612b for year 2 maintenance requirements for tree & shrub establishment. Year 1 in Job Sheet is considered the first year of planting

c) Maintenance shall include mowing the permanently seeded area twice per year during the growing season. This shall include weed whacking around tree tubes and shrubs. Mowing schedule shall depend on timing of Spring and growth of competing weeds. Typically, the first mowing shall occur late April/May and the second mowing late June/July.

d) Contractor is responsible for mowing to a height of 6 inches, and mowed biomass shall remain on site.

e) Payment for this work item will be lump sum upon completion of mowings as per method 2.

(210-VI-NEH, January 2014) 6-5

4. Item of work 009 shall consist of maintenance of permanent seeding and tree/shrub plantings for the third year growing season after planting.

a) Area to be included in maintenance includes all permanently seeded areas and all tree & shrub plantings.

b) Refer to Job Sheets 612a and 612b for year 3 maintenance requirements for tree & shrub establishment. Year 1 in job sheet is considered time of planting.

c) Maintenance shall include mowing the permanently seeded area twice per year during the growing season. This shall include weed whacking around tree tubes and shrubs. Mowing schedule shall depend on timing of Spring and growth of competing weeds. Typically, the first mowing shall occur late April/May and the second mowing late June/July.

d) Contractor is responsible for mowing to a height of 6 inches, and mowed biomass shall remain on site.

e) Payment for this work item will be lump sum upon completion of mowings as per method 2.

(210-VI-NEH, January 2014) 6-6