20160822_CONSTRUCTION_SPECIFICATIONS_ISSUE_FOR_CONSTRUCTION_REV_-_4.pdf

Construction Specifications WRP Easement #: 6645320900RQJ

Date: 06/27/2016

Issue: FOR BID AND CONSTRUCTION – REV 4

Construction and Material Specifications

Project:

TILLERY

Wetland Reserve Project

Issue:

FOR BID AND CONSTRUCTION

Revision #4

Page i

Table of Contents

List of Construction Specifications ........................................................................................................................... v List of Material Specifications ................................................................................................................................... v Construction Specification 2—Clearing and Grubbing ..................................................................................... 2-1

1. Scope ............................................................................................................................................................ 2-1

2. Protection of Existing Vegetation ............................................................................................................. 2-1

3. Marking ....................................................................................................................................................... 2-1

4. Clearing and Grubbing .............................................................................................................................. 2-1

5. Disposal ....................................................................................................................................................... 2-1

6. Measurement and payment ...................................................................................................................... 2-1

7. Items of work and construction details ................................................................................................... 2-3

Construction Specification 3—Structure Removal ............................................................................................. 3-1

1. Scope ............................................................................................................................................................ 3-1

2. Marking ....................................................................................................................................................... 3-1

3. Removal ....................................................................................................................................................... 3-1

4. Salvage ......................................................................................................................................................... 3-1

5. Disposal of Refuse Materials .................................................................................................................... 3-1

6. Measurement and payment ...................................................................................................................... 3-1

7. Items of work and construction details ................................................................................................... 3-2 Construction Specification 5—Pollution Control ............................................................................................... 5-1

1. Scope ............................................................................................................................................................ 5-1

2. Material ........................................................................................................................................................ 5-1

3. Erosion and sediment control measures and works ............................................................................. 5-1

4. Chemical pollution ..................................................................................................................................... 5-2

5. Air pollution ............................................................................................................................................... 5-2

6. Maintenance, removal, and restoration .................................................................................................. 5-2

7. Measurement and payment ...................................................................................................................... 5-2

8. Items of work and construction details ................................................................................................... 5-3

Construction Specification 6—Seeding, Sprigging, and Mulching .................................................................. 6-1

1. Scope ............................................................................................................................................................ 6-1

2. Material ........................................................................................................................................................ 6-1

3. Seeding mixtures, sod, sprigs, and dates of planting ............................................................................ 6-2

4. Seedbed preparation and treatment ........................................................................................................ 6-2

5. Seeding, sprigging, fertilizing, mulching, and stabilizing .................................................................... 6-2

6. Measurement and payment ...................................................................................................................... 6-2

7. Items of work and construction details ................................................................................................... 6-3

Construction Specification 7—Construction Surveys ........................................................................................ 7-1

1. Scope ............................................................................................................................................................ 7-1

2. Equipment and material ............................................................................................................................ 7-1

3. Quality of work .......................................................................................................................................... 7-1

4. Primary control ........................................................................................................................................... 7-2

5. Construction surveys ................................................................................................................................. 7-2

6. Staking ......................................................................................................................................................... 7-3

7. Records ........................................................................................................................................................ 7-3

8. Payment ....................................................................................................................................................... 7-3

9. Items of work and construction details ................................................................................................... 7-4

Page ii

Construction Specification 8—Mobilization and Demobilization ................................................................... 8-1

1. Scope ............................................................................................................................................................ 8-1

2. Equipment and material ............................................................................................................................ 8-1

3. Payment ....................................................................................................................................................... 8-1

4. Items of work and construction details ................................................................................................... 8-1

Construction Specification 10—Water for Construction ................................................................................. 10-1

1. Scope .......................................................................................................................................................... 10-1

2. Facilities and equipment ......................................................................................................................... 10-1

3. Dust abatement and haul road maintenance........................................................................................ 10-1

4. Earthfill, drainfill, and rockfill ................................................................................................................ 10-1

5. Concrete, mortar, and grout ................................................................................................................... 10-1

6. Other construction requiring water ....................................................................................................... 10-1

7. Measurement and payment .................................................................................................................... 10-1

8. Items of work and construction details ................................................................................................. 10-2

Construction Specification 11—Removal of Water .......................................................................................... 11-1

1. Scope .......................................................................................................................................................... 11-1

2. Diverting surface water ........................................................................................................................... 11-1

3. Dewatering the construction site ........................................................................................................... 11-1

4. Dewatering borrow areas ........................................................................................................................ 11-1

5. Erosion and pollution control ................................................................................................................. 11-2

6. Removal of temporary works ................................................................................................................. 11-2

7. Measurement and payment .................................................................................................................... 11-2

8. Items of work and construction details ................................................................................................. 11-3

Construction Specification 21—Excavation ...................................................................................................... 21-1

1. Scope .......................................................................................................................................................... 21-1

2. Classification ............................................................................................................................................. 21-1

3. Blasting ...................................................................................................................................................... 21-1

4. Use of excavated material ....................................................................................................................... 21-2

5. Disposal of waste materials .................................................................................................................... 21-2

6. Excavation limits ...................................................................................................................................... 21-2

7. Borrow excavation ................................................................................................................................... 21-2

8. Overexcavation ......................................................................................................................................... 21-2

9. Measurement and payment .................................................................................................................... 21-3

10. Items of work and construction details ................................................................................................. 21-4

Construction Specification 23—Earthfill ........................................................................................................... 23-1

1. Scope .......................................................................................................................................................... 23-1

2. Material ...................................................................................................................................................... 23-1

3. Foundation preparation .......................................................................................................................... 23-1

4. Placement .................................................................................................................................................. 23-2

5. Control of moisture content .................................................................................................................... 23-2

6. Compaction ............................................................................................................................................... 23-3

7. Reworking or removal and replacement of defective earthfill .......................................................... 23-4

8. Testing ....................................................................................................................................................... 23-4

9. Measurement and payment .................................................................................................................... 23-5

10. Items of work and construction details ................................................................................................. 23-6

Construction Specification 44—Corrugated Polyethylene Pipe ..................................................................... 44-1

1. Scope .......................................................................................................................................................... 44-1

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2. Material ...................................................................................................................................................... 44-1

3. Handling and Storage .............................................................................................................................. 44-1

4. Excavation ................................................................................................................................................. 44-1

5. Preparing the Pipe Bed and Blinding the Pipe ..................................................................................... 44-2

6. Placement and Joint Connections .......................................................................................................... 44-2

7. Backfilling .................................................................................................................................................. 44-2

8. Measurement and payment .....................................................................................................................44-2

9. Items of work and construction details ................................................................................................. 44-3

Construction Specification 61—Rock Riprap .................................................................................................... 61-1

1. Scope .......................................................................................................................................................... 61-1

2. Material ...................................................................................................................................................... 61-1

3. Subgrade preparation .............................................................................................................................. 61-2

4. Equipment placed rock riprap ............................................................................................................... 61-2

5. Hand placed rock riprap ......................................................................................................................... 61-2

6. Filter or bedding ........................................................................................................................................61-2

7. Measurement and payment .................................................................................................................... 61-2

8. Items of work and construction details ................................................................................................. 61-3

Construction Specification 95—Geotextile ........................................................................................................ 95-1

1. Scope .......................................................................................................................................................... 95-1

2. Quality ....................................................................................................................................................... 95-1

3. Storage ....................................................................................................................................................... 95-1

4. Surface preparation .................................................................................................................................. 95-1

5. Placement .................................................................................................................................................. 95-1

6. Measurement and payment .................................................................................................................... 95-2

7. Items of work and construction details ................................................................................................. 95-3

Construction Specification 96—Field Office ..................................................................................................... 96-1

1. Scope .......................................................................................................................................................... 96-1

2. Logistics ..................................................................................................................................................... 96-1

3. Materials and furnishings ....................................................................................................................... 96-1

4. Payment ..................................................................................................................................................... 96-3

5. Items of work and construction details ................................................................................................. 96-3

Construction Specification 400 - Tree Planting ................................................................................................ 400-1

1. Scope ......................................................................................................................................................... 400-1

2. Materials ................................................................................................................................................... 400-1

3. Construction Methods ............................................................................................................................ 400-1

4. Measurement and Payment ................................................................................................................... 400-2

5. Items of Work and construction details ............................................................................................... 400-3

Construction Specification 401—Precast Concrete Structures ..................................................................... 401-1

1. Scope ........................................................................................................................................................ 401-1

2. Materials .................................................................................................................................................. 401-1

3. Construction Methods ........................................................................................................................... 401-4

4. Plan Requirements ................................................................................................................................. 401-4

5. Items of Work and construction details. ............................................................................................. 401-5

Construction Specification 402 - Live Stakes ................................................................................................... 402-1

1. Scope ......................................................................................................................................................... 402-1

2. Materials ................................................................................................................................................... 402-1

3. Construction Methods ............................................................................................................................ 402-1

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4. Measurement and Payment ................................................................................................................... 402-3

5. Items of Work and construction details ............................................................................................... 402-3

Construction Specification 403 - Wetland Plugs ............................................................................................. 403-1

1. Scope ......................................................................................................................................................... 403-1

2. Materials ................................................................................................................................................... 403-1

3. Construction Methods ............................................................................................................................ 403-1

4. Measurement and Payment ................................................................................................................... 403-3

5. Items of Work and construction details ............................................................................................... 403-3

Construction Specification 404 - Erosion Control Matting ............................................................................ 404-1

1. Scope ......................................................................................................................................................... 404-1

2. Materials ................................................................................................................................................... 404-1

3. Construction Methods ............................................................................................................................ 404-1

4. Measurement and Payment ................................................................................................................... 404-2

5. Items of Work and construction details ............................................................................................... 404-2

Construction Specification 405 - Log In-stream Structures ............................................................................ 405-1

1. Scope ......................................................................................................................................................... 405-1

2. Materials ................................................................................................................................................... 405-1

3. Construction Methods ............................................................................................................................ 405-1

4. Measurement and Payment ................................................................................................................... 405-1

5. Items of Work and construction details ............................................................................................... 405-2

Material Specification 522—Aggregates for Portland Cement Concrete ..................................................... 522-1

1. Scope ......................................................................................................................................................... 522-1

2. Quality ...................................................................................................................................................... 522-1

3. Reactivity with Alkalies ......................................................................................................................... 522-1

4. Storing and Handling ............................................................................................................................. 522-1

Material Specification 523—Rock Riprap ......................................................................................................... 523-1

1. Scope ......................................................................................................................................................... 523-1

2. Quality ...................................................................................................................................................... 523-1

3. Methods of Soundness Testing.............................................................................................................. 523-2

4. Field Durability Testing ......................................................................................................................... 523-3

5. Grading ..................................................................................................................................................... 523-3

Material Specification 531—Portland Cement ................................................................................................. 531-1

1. Scope ........................................................................................................................................................ 531-1

2. Quality ...................................................................................................................................................... 531-1

3. Storage at the Construction Site ............................................................................................................ 531-1

Material Specification 532—Supplementary Cementitous Materials ........................................................... 532-1

1. Scope ......................................................................................................................................................... 532-1

2. Quality ...................................................................................................................................................... 532-1

Material Specification 548—Corrugated Polyethylene Pipe .......................................................................... 548-1

1. Scope ......................................................................................................................................................... 548-1

2. Pipe ............................................................................................................................................................ 548-1

3. Fittings ...................................................................................................................................................... 548-1

Material Specification 592—Geotextile ............................................................................................................. 592-1

1. Scope ......................................................................................................................................................... 592-1

2. General Requirements ............................................................................................................................ 592-1

3. Classification ............................................................................................................................................ 592-1

4. Sampling and Testing ............................................................................................................................. 592-1

Page v

5. Shipping and Storage.............................................................................................................................. 592-2

Page v

List of Construction Specifications

• 002 Clearing and Grubbing

• 003 Structure Removal

• 005 Pollution Control

• 006 Seeding, Sprigging, and Mulching

• 007 Construction Surveys

• 008 Mobilization and Demobilization

• 010 Water for Construction

• 011 Removal of Water

• 021 Excavation

• 023 Earthfill

• 044 Corrugated Polyethylene Pipe

• 061 Rock Rip Rap

• 095 Geotextile

• 096 Field Office

• 400 Tree Planting

• 401 Precast Concrete Structure

• 402 Live Stakes

• 403 Wetland Plug Plantings

• 404 Erosion Control Matting

• 405 Log In-stream Structures

List of Material Specifications

• 522 Aggregates for Portland Cement Concrete

• 523 Rock Riprap

• 531 Portland Cement

• 532 Supplementary Cementious Materials

• 548 Corrugated Polyethylene Pipe

• 592 Geotextile

Page 2-1 of 2-4

Construction Specification 2—Clearing and Grubbing

1. Scope The work consists of clearing and grubbing and disposal of trees, snags, logs, brush, stumps, shrubs, and rubbish from the designated areas.

2. Protection of Existing Vegetation Trees and other vegetation designated to remain undisturbed shall be protected from damage throughout the duration of the construction period. Any damages resulting from the contractor's operations or neglect shall be repaired by the contractor.

Earthfill, stockpiling of materials, vehicular parking, and excessive foot or vehicular traffic shall not be allowed within the drip line of vegetation designated to remain in place. Vegetation damaged by any of these or similar actions shall be replaced with viable vegetation of the same species, similar condition, and like size unless otherwise approved by the contracting officer.

Any cuts, skins, scrape, or bruises to the bark of the vegetation shall be carefully trimmed and local nursery accepted procedures used to seal damaged bark.

Any limbs or branches 0.5 inch or larger in diameter that are broken, severed, or otherwise seriously damaged during construction shall be cut off at the base of the damaged limb or branch flush with the adjacent limb or tree trunk. All roots 1-inch or larger in diameter that are cut, broken, or otherwise severed during construction operations shall have the end smoothly cut perpendicular to the root. Roots exposed during excavation or other operations shall be covered with moist earth or backfilled as soon as possible to prevent the roots from drying out.

3. Marking The limits of the area(s) to be cleared and grubbed will be marked by stakes, flags, tree markings, or other suitable methods. Trees to be left standing and uninjured will be designated by special markings placed on the trunk about 6 feet above the ground surface.

4. Clearing and Grubbing All trees not marked for preservation and all snags, logs, brush, stumps, shrubs, rubbish, and similar materials shall be cleared from within the limits of the designated areas. Unless otherwise specified, all stumps, roots, and root clusters that have a diameter of 1 inch or larger shall be grubbed out to a depth of at least 2 feet below subgrade for concrete structures and 1 foot below the ground surface at embankment sites and other designated areas.

5. Disposal All materials cleared and grubbed from the designated areas shall be disposed of at locations shown on the drawings or in a manner specified in section 7. The contractor is responsible for complying with all local rules and regulations and the payment of any and all fees that may result from disposal at locations away from the project site.

6. Measurement and payment Method 1—For items of work for which specific units prices are established in the contract, the cleared and grubbed area is measured to the nearest 0.1 acre. Payment for clearing and grubbing is made for the total area within the designated limits at the contract unit price. Such payment will constitute full

Page 2-2 of 2-4 compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 2—For items of work for which specific unit prices are established in the contract, the length of the cleared and grubbed area is measured to the nearest full station (100 feet) along the line designated on the drawing or identified in the specifications. Payment for clearing and grubbing is made for the total length within the designated limits at the contract unit price. Such payment will constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 3—For items of work for which specific unit prices are established in the contract, each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet are measured before removal. The size of each tree and snag is determined by measuring its trunk at breast height above the natural ground surface. The size of each log is determined by measuring the butt and by measuring its length from butt to tip. The size of each stump is measured at the top. Diameter is determined by dividing the measured circumference by 3.14.

Payment for clearing and grubbing of each tree, stump, and snag having a diameter of 4 inches or larger and each log having a diameter of 4 inches or larger and a length of 10 feet or larger is made at the contract unit price for its size designation as determined by the following schedule:

Measured diameter Size designation

(in) (in) 4 to 86

8 to 12 10

12 to 24 18

24 to 36 30

36 to 60 48

Over 60 60

The sum of such payments shall constitute full compensation for clearing and grubbing (including the clearing and grubbing of smaller trees, stumps, snags, logs, brush, shrubs, and roots), applicable permits and associated fees, and rubbish removal. Such payment shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the completion of the work.

Method 4—For items of work for which specific lump sum prices are established in the contract, payment for clearing and grubbing is made at the contract lump sum price. Such payment shall constitute full compensation for all labor, equipment, tools, and all other items necessary and incidental to the 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 will be included in the payment for the item of work to which it is made subsidiary. Such items and the items to which they are made subsidiary are identified in section 7.

Page 2-3 of 2-4

7. Items of work and construction details

A. Bid Item #8 Clearing and Grubbing.

1) This item shall consist of all work associated with clearing and grubbing areas as identified on the construction drawings.

2) Areas shall be flagged by contractor in accordance with Section 3 of this specification and Construction Specification 7.

3) Grubbing shall be as follows:

Construction Specification #2 Table #1: Grubbing Requirements

Bid Items Grubbing Requirement 10 & 11; Stream Grading North and South, respectively

No Grubbing Required

12; Offline Cells #1 No Grubbing Required 15 & 16; Pathway Improvements North and South, respectively

No grubbing Required on existing path;

any widening of path shall be grubbed One (1) foot below ground surface

19; Water Control Structure Grub Two (2) foot below subgrade 17 - 18; Culvert Installation Grub Two (2) foot below subgrade 13 & 14; Ditch Plugs #1 and Ditch Berm #1, respectively

Grub One (1) foot below ground surface

4) Clearing shall be performed as defined below in table 2, on the following bid items:

Construction Specification #2 Table #2: Clearing Requirements as outline in Section 4 Bid Items Clearing Requirement 10 & 11; Stream Grading North and South, respectively

Clearing in accordance with Section 4 above along ditches and wooded areas along the alignment (North Stream Sta:

30+00 to 33+34; South Stream Sta: 39+50 to 40+85)

12; Offline Cells #1 Clearing in accordance with Section 4 above along ditches.

13 & 14; Ditch Plugs #1 and Ditch Berm #1, respectively

Clearing in accordance with Section 4 above along ditches.

15 & 16; Pathway Improvements North and South, respectively

Clearing in accordance with Section 4 above along ditches.

17 - 18; Culvert Installation Clearing in accordance with Section 4 above along ditches.

19; Water Control Structure Clearing in accordance with Section 4 above along ditches.

5) Clearing via mulching shall be performed with two types of equipment, unless otherwise listed on the plan set:

a. A low ground pressure track-driven (< 5 psi) cutting machine which is designed to cut, chip, and mow brush and small trees without penetrating the topsoil. The

Page 2-4 of 2-4 equipment shall produce mulched vegetation. A rotary cutter and/or flail style cutting head is not acceptable. Vegetation shall be cut flush with ground surface.

Minimum cutting width shall be 72 inches. Contractor shall submit to project engineer cutting head specs prior to use on site.

b. A hydraulic excavator mounted cutting head which is designed to cut, chip, and mow brush and small trees without penetrating the topsoil. The equipment shall produce mulched vegetation. A rotary cutter and/or flail style cutting head is not acceptable. Vegetation shall be cut flush with ground surface. Minimum cutting width shall be 50 inches. Contractor shall submit to project engineer cutting head specs prior to use on site.

c. Either a or b above (machine mounted or excavator mounted) shall be attached to a machine with a minimum 125 engine horsepower. The mulch produced by the machine shall be no larger than 1 ½ inches in diameter and 18 inches in length.

d. Clearing via mulching shall be limited to areas as defined in Table 3 below.

Construction Specification #2 Table #3: Clearing Requirements via mulching.

Bid Items Clearing Requirement 10 through 16 Clearing via Mulching within field areas, unless otherwise directed by Project Engineer.

6) All material removed from clearing and grubbing activities shall be disposed of in designated areas as shown on the construction drawings.

7) Contractor shall avoid trees which have been marked on construction plans; contractor shall mark trees as indicated in Section 3 of this specification.

8) All payment requests, with each invoice, shall be accompanied by complete documentation and supporting data in accordance with Construction Specification 7.

9) The measurement and payment shall be Method 1 in Section 6 of this construction specification. Measurement and payment shall be per Acre (AC), rounded to the nearest 0.1 acres. Payment shall constitute full compensation for all work associated with Bid Line Item #8.

10) The following items are subsidiary to this item:

a) Pollution Control, as specified in Construction Specification 5.

b) Removal of Water, as specified in Construction Specification 11.

Page 3-1 of 3-2

Construction Specification 3—Structure Removal

The work shall consist of the removal, salvage, and disposal of structures (including fences) from the designated areas.

2. Marking Method 1—Each structure or structure part to be removed will be marked with stakes, flags, paint, or other suitable method.

Method 2—The area boundaries from which structures must be removed will be marked using stakes, flags, paint, or other suitable method. Structures to remain undisturbed or to be salvaged will be designated by special markings.

3. Removal Method 1—All structures designated for removal in the contract shall be removed to the specified extent and depth.

Method 2—Within the areas so marked, all visible and buried structures identified shall be removed to the specified extent and depth.

4. Salvage Structures or structure parts that are designated to be salvaged shall be carefully removed and neatly placed in the specified or approved storage location. Salvaged structures that are capable of being disassembled shall be dismantled into individual members or sections. Such structures shall be neatly and systematically match marked with paint before disassembly. All connectors and other parts shall be marked to indicate their proper location within the structure and shall be fastened to the appropriate structural member or packed in suitable containers.

Material from fences designated to be salvaged shall be placed outside the work area on the property on which the fence was originally located. Fence wire shall be rolled into uniform rolls of suitable size and neatly piled with other salvaged materials. Posts and rails shall be neatly stacked.

5. Disposal of Refuse Materials Refuse materials resulting from structure removal shall be disposed of in a manner and at locations specified in section 7 of this specification or in an acceptable manner and at locations approved by the contracting officer. Disposal by burning shall be in accordance with local rules and regulations.

6. Measurement and payment Method 1—For items of work for which specific unit prices are established by the contract, payment for the removal of each structure unit, except fences, is made at the contract unit price. Fences removed or removed and salvaged are measured to the nearest linear foot. Payment for fence removal or removal and salvage is made at the contract unit prices for each type and size of fence.

Such payment will constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the completion of the work.

Page 3-2 of 3-2

Method 2—For items of work for which specific lump sum prices are established by the contract, payment for structure removal is made at the contract lump sum price.

Such payment will constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the 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 as a contract line item number in the bid schedule, is included in the payment for the item of work to which it is made subsidiary. Such items and items to which they are made subsidiary are identified in section 7 of this specification.

7. Items of work and construction details

A. Bid Item #9 Structure Removal.

1) This item shall consist of all work associated with removing structures as identified on the construction drawings.

2) Areas shall be flagged by contractor in accordance with Method 1 of Section 2 of this specification and Construction Specification 7.

3) All structures shall be removed and disposed off the project site in accordance with all federal, state, and local regulations. Payment shall not be made until structure is removed for the project site.

4) Backfill shall be accomplished in accordance with Construction Specification 23.

5) All payment requests, with each invoice, shall be accompanied by complete documentation and supporting data in accordance with Construction Specification 7.

6) The measurement and payment shall be Method 1 in Section 6 of this construction specification. Measurement and payment shall be made per each (EA). Payment shall constitute full compensation for all work associated with Bid Line Item #9.

7) The following items are subsidiary to this item:

a) Pollution Control, as specified in Construction Specification 5.

b) Water for Construction, as specified in Construction Specification 10.

c) Removal of Water, as specified in Construction Specification 11.

d) Earthfill, as specified in Construction Specification 23.

Page 5-1 of 5-9

Construction Specification 5—Pollution Control

The work consists of installing measures or performing work to control erosion and minimize the production of sediment and other pollutants to water and air from construction activities.

2. Material All material furnished shall meet the requirements of the material specifications listed in section 8 of this specification.

3. Erosion and sediment control measures and works The measures and works shall include, but are not limited to, the following:

Staging of earthwork activities—The excavation and moving of soil materials shall be scheduled to minimize the size of areas disturbed and unprotected from erosion for the shortest reasonable time.

Seeding—Seeding to protect disturbed areas shall occur as soon as reasonably possible following completion of that earthwork activity.

Mulching—Mulching to provide temporary protection of the soil surface from erosion.

Diversions—Diversions to divert water from work areas and to collect water from work areas for treatment and safe disposition. They are temporary and shall be removed and the area restored to its near original condition when the diversions are no longer required or when permanent measures are installed.

Stream crossings—Culverts or bridges where equipment must cross streams. They are temporary and shall be removed and the area restored to its near original condition when the crossings are no longer required or when permanent measures are installed.

Sediment basins—Sediment basins collect, settle, and eliminate sediment from eroding areas from impacting properties and streams below the construction site(s). These basins are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Sediment filters—Straw bale filters or geotextile sediment fences trap sediment from areas of limited runoff. Sediment filters shall be properly anchored to prevent erosion under or around them. These filters are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Waterways—Waterways for the safe disposal of runoff from fields, diversions, and other structures or measures. These works are temporary and shall be removed and the area restored to its original condition when they are no longer required or when permanent measures are installed.

Other—Additional protection measures as specified in section 8 of this specification or required by Federal, State, or local government.

Page 5-2 of 5-9

4. Chemical pollution The contractor shall provide watertight tanks or barrels or construct a sump sealed with plastic sheets to collect and temporarily contain chemical pollutants, such as drained lubricating or transmission fluids, grease, soaps, concrete mixer washwater, or asphalt, produced as a by-product of the construction activities. Pollutants shall be disposed of in accordance with appropriate State and Federal regulations. At the completion of the construction work, tanks, barrels, and sumps shall be removed and the area restored to its original condition as specified in section 8 of this specification. Sump removal shall be conducted without causing pollution.

Sanitary facilities, such as chemical toilets, or septic tanks shall not be located next to live streams, wells, or springs. They shall be located at a distance sufficient to prevent contamination of any water source. At the completion of construction activities, facilities shall be disposed of without causing pollution as specified in section 8 of this specification.

5. Air pollution The burning of brush or slash and the disposal of other materials shall adhere to state and local regulations.

Fire prevention measures shall be taken to prevent the start or spreading of wildfires that may result from project activities. Firebreaks or guards shall be constructed and maintained at locations shown on the drawings.

All public access or haul roads used by the contractor during construction of the project shall be sprinkled or otherwise treated to fully suppress dust. All dust control methods shall ensure safe construction operations at all times. If chemical dust suppressants are applied, the material shall be a commercially available product specifically designed for dust suppression and the application shall follow manufacturer's requirements and recommendations. A copy of the product data sheet and manufacturer's recommended application procedures shall be provided to the engineer 5 working days before the first application.

6. Maintenance, removal, and restoration All pollution control measures and temporary works shall be adequately maintained in a functional condition for the duration of the construction period. All temporary measures shall be removed and the site restored to near original condition.

7. Measurement and payment Method 1—For items of work for which specific unit prices are established in the contract, each item is measured to the nearest unit applicable.