Attachment 1 Site 8 Dam_Specifications.pdf

ASSUNPINK CREEK WATERSHED

FLOODWATER RETARDING STRUCTURE NO. 8

CONSTRUCTION AND MATERIAL

SPECIFICATIONS

Hamilton Township, Mercer County, New Jersey

Contract # 12SPEC18D0023 Task Order # 12FPC322F0072

February 29, 2024

Joe Bellini, PE, PH, BC.WRE, CFM

USDA-NRCS

Assunpink Creek Watershed Dam No. 8 Rehabilitation

NRCS – February 2024

Assunpink Creek Watershed 8 Dam Rehabilitation Project

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©2024 All Rights Reserved

CONSTRUCTION SPECIFICATIONS TABLE OF CONTENTS

Construction Specification 2 — Clearing and Grubbing

Construction Specification 3 — Structure Removal

Construction Specification 5 — Pollution Control

Construction Specification 6 — Seeding, Sprigging, and Mulching

Construction Specification 7— Construction Surveys

Construction Specification 8 — Mobilization and Demobilization

Construction Specification 9 — Traffic Control

Construction Specification 10 — Water for Construction

Construction Specification 11— Removal of Water

Construction Specification 21 — Excavation

Construction Specification 23 — Earthfill

Construction Specification 24 — Drainfill

Construction Specification 26 —Topsoiling

Construction Specification 31 — Concrete for Major Structures

Construction Specification 34 — Steel Reinforcement

Construction Specification 35 — Concrete Repair

Construction Specification 36 — Roller Compacted Concrete

Construction Specification 45 — Plastic Pipe

Construction Specification 61—Rock Riprap

Construction Specification 81 — Metal Fabrication and Installation

Construction Specification 82 — Painting Metalwork

Construction Specification 91 — Chain Link Fence

Construction Specification 94 — Contractor Quality Control

Construction Specification 95 — Geotextile

Construction Specification 96 — Field Office

Construction Specification 400 – Bituminous Concrete Pavement

Construction Specification 401 — Geotechnical Instrumentation

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MATERIAL SPECIFICATIONS TABLE OF CONTENTS

Material Specification 521, Aggregates for Drainfill and Filters.

Material Specification 522, Aggregates for Portland Cement Concrete

Material Specification 523, Rock for Riprap

Material Specification 524, Aggregates for Roller Compacted Concrete

Material Specification 531, Portland Cement

Material Specification 532, Supplementary Cementitious Materials

Material Specification 533, Chemical Admixtures for Concrete

Material Specification 535, Preformed Expansion Joint Filler

Material Specification 536, Sealing Compound for Joints in Concrete and Concrete Pipe

Material Specification 537, Nonmetallic Waterstops

Material Specification 539, Steel Reinforcement (for concrete)

Material Specification 547, Plastic Pipe

Material Specification 553 Ductile Iron Pipe

Material Specification 581, Metal

Material Specification 582, Galvanizing

Material Specification 592, Geotextile

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©2024 All Rights Reserved

CONSTRUCTION SPECIFICATIONS

(210-VI-NEH, May 2001) 2-1

CONSTRUCTION SPECIFICATION 2—CLEARING AND GRUBBING

Scope

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

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, scrapes, 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 one (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.

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 six (6) feet above the ground surface.

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 one (1) inch or larger shall be grubbed out to a depth of at least two (2) feet below subgrade for concrete structures and one (1) foot below the ground surface at embankment sites and other designated areas.

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.

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

(210-VI-NEH, May 2001) 2-2 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

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 8 6

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

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.

Assunpink Creek Watershed 8 Dam Rehabilitation Project 2-3

Items of work and construction details

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

A. Bid Item 1 – Clearing and Grubbing

1) This item shall consist of all clearing and grubbing required for the installation of the works of improvement as shown on the Drawings, including but not limited to trees, brush, and woody vegetation.

2) The Contractor shall survey and flag the limits of clearing and grubbing for approval by the

COR prior to the start of clearing operations. Clearing and grubbing operations shall not begin until flagged limits have been approved. Blasting is not allowed.

3) In Section 5, Disposal, no disposal will be allowed on site. Burning is not allowed. All materials resulting from Clearing and Grubbing shall become the property of the Contractor and shall be removed from the site and disposed of in accordance with all applicable federal, state, and local regulations.

4) Land clearing debris (trees, limbs, and brush) may be mulched onsite using a wood chipper.

The location of mulch stockpiles shall be approved by the COR. Mulch may be used for erosion control. All unused mulch shall be disposed of off-site by the Contractor at the conclusion of the project. Land clearing debris (trees, snags, logs, brush, shrubs, and stumps) too large to be mulched shall be disposed of off-site by the Contractor.

5) Costs for off-site disposal and all necessary permits and fees shall be incidental to the item of work.

6) All trees, snags, logs, brush, shrubs, stumps, and rubbish that are felled, detached, or otherwise dislocated in or near the lake or stream channels shall be disposed of as specified or removed to higher ground prior to the end of each workday. The Contractor is to take precaution, when temporarily stockpiling cleared and grubbed materials, to guard against such cleared and grubbed materials being floated or transported off the worksite by rainstorm runoff.

7) Upon completion of the clearing and grubbing operation, all areas which have been cleared shall be dressed to be reasonably smooth by blading, dragging or floating. The entire area shall be reasonably free of abrupt mounds, dips and windrows to provide a clear area for construction staking. Earthfill for repairing grubbed areas shall be placed in accordance with

Construction Specification 23, Earthfill and shall be incidental to the completion of the work.

8) All trash (rubbish) and all other such waste and refuse materials shall be removed from the worksite and disposed of in an approved landfill in accordance with all state and local regulations and laws. Costs for off-site disposal, including all necessary permits and fees, shall be incidental to the item of work.

9) In Section 6, Measurement and Payment, Method 1 applies.

**End of Construction Specification 2**

Assunpink Creek Watershed 8 Dam Rehabilitation Project 2-4

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(210-VI-NEH, May 2001) 3-1

CONSTRUCTION SPECIFICATION 3—STRUCTURE REMOVAL

Scope

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

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.

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.

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.

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.

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.

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.

(210-VI-NEH, May 2001) 3-2

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.

3-3

A. Bid Item 2 – Structure Removal

1) This item shall consist of the removal and disposal of structures shown on the Drawings and as specified herein, including the impact basin chain link fence, rock and concrete walls located adjacent to the impact basin, and any other miscellaneous structures required for performance of the work as approved by the COR.

2) This item also includes the removal, disposal, and replacement of the trail benches located on the crest of the embankment as shown on the drawings. The replacement benches shall be similar to the existing metal bench that is removed. The Contractor shall submit detailed drawings, material list, and specifications to the COR for approval prior to removing the existing benches.

3) Any damage to any related features shall be repaired as directed by the COR at the Contractor’s expense and no additional cost to the Government.

4) Earthfill used for repairing areas damaged by structure removal shall be placed in accordance with Construction Specification 23, Earthfill and shall be incidental to the completion of the work.

5) In Section 2 – Marking, Method 1 will apply. The Contractor shall be responsible for marking.

6) In Section 3 – Removal, Method 1 will apply. Structures designated for removal are shown on the Drawings.

7) In Section 4 – Salvage, no structures are designated to be salvaged.

8) In Section 5 – Disposal of Refuse Materials, refuse materials resulting from structural removal shall become the property of the Contractor and shall be removed from the site and disposed of in accordance with all applicable federal, state, and local regulations. The disposal location is subject to the approval of the Contracting Officer. Burning of refuse materials and blasting shall not be allowed on site. Costs for offsite disposal, including all necessary permits and fees, shall be incidental to the work.

9) In Section 6 – Measurement and Payment, Method 2 will apply. Progress payments may be prorated based on the contract lump sum price in accordance with the planned construction schedule.

10) Items subsidiary to this Bid Item include:

a) Miscellaneous Excavation, Construction Specification 21, Excavation

b) Miscellaneous Earthfill, Construction Specification 23, Earthfill

B. Bid Item 3 –Toe Drain Abandonment

1) This item shall consist of the removal and disposal of the existing toe drain pipe within the designated excavation limits shown on the Drawings and as specified herein. This item also includes furnishing all labor, equipment, materials, and other items necessary and incidental to flushing, inspecting, and abandoning in-place the existing 6-inch diameter perforated asbestos cement pipe within the existing trench drains as shown on the Drawings. There are two drains, one on either side of the existing principal spillway conduit. All work associated with this Bid Item shall be completed prior to beginning excavation for new embankment toe drain.

2) This item also includes the grouting of the remaining toe drain pipe as specified below.

3-4

3) Any damage to the principal spillway conduit and related features shall be repaired as directed by the COR at the Contractor’s expense and no additional cost to the Government.

4) The Contractor is required to submit a Toe Drain Abandonment Plan to the COR at least 30 days prior to starting any demolition work. The Toe Drain Abandonment Plan shall address the following:

a. Proposed work sequence and schedule from the start to finish to locate, remove, haul off-site, the asbestos cement pipe to be removed and grouting operations for the remaining asbestos cement pipe.

b. Means and methods to remove and dispose of the asbestos cement pipe. The Contractor is to identify and list the necessary federal and state regulations and requirements, including the personal protective equipment (PPE) and personnel qualifications/certifications, to remove and dispose of the asbestos cement pipe.

c. In Section 5 – Disposal of Refuse Materials, asbestos cement pipe materials resulting from removal shall become the property of the Contractor and shall be removed from the site The disposal location is subject to the approval of the COR or the Engineer.

The Contractor shall follow all federal state and local regulations for the removal and disposal of the asbestos cement pipe, including meeting:

i. Asbestos Control and Licensing Act (ACLA) (N.J.S.A. 34:5A-32 et seq.) and Regulations (N.J.A.C. 12:120).

ii. All asbestos abatement work must be conducted by a Department of Labor and Workforce Development - licensed asbestos abatement contractor.

iii. All the Contractor’s employees who conduct asbestos abatement work must be trained by a NJDOH-certified training agency, which has met the training requirements set forth by the NJDOH.

iv. All federal state and local regulations for transportation, notification, and documents requirements.

v. Disposal shall be in a NJDEP-approved Operating Commercial Sanitary Landfill authorized to accept solid waste type ID27A asbestos or asbestos containing waste.

vi. Contact the New Jersey Department of Environmental Protection for any questions regarding the removal, transportation and disposal of the asbestos cement pipe.

d. Means and methods to clean, inspect, and tremie grout the existing trench drain pipes.

e. Methods to monitor placed grout volumes and grout pressure and to demonstrate that the entire pipe volume is fully grouted. Batching and pumping rate shall be indicated.

Quantify the volume of grout during the grouting operation to confirm the pipe is completely grouted. Address the installation of bulkheads, vents, grout nipples, slick lines, and any other materials and equipment necessary to maintain pressure and flow of the mix.

f. Proposed non-shrink grout mix design, including test results indicating compliance with these Specifications. Include a detailed description of the mechanisms that will be used for producing and conveying the job mix into the conduit. Once approved by the COR, the statement of materials and proportions will constitute the job mix. Any change to the job mix must be approved by the COR.

g. Proposed mixing, pumping, and conveying equipment.

5) Provide a cementitious, non-shrink grout designed by the Contractor to completely fill the full length of the pipe completely to the crown of the pipe. Grout mix shall consist of a mixture of

Type I/II Portland Cement (ASTM C150), or Type IL Portland Cement (ASTM 595), water, admixtures, sand, and/or bulk filler. Sand shall meet the requirements for Fine aggregate in

3-5

Material Specifications 522, Aggregates for Portland Cement Concrete . All admixtures shall conform to the requirements of Material Specification 533, Chemical Admixtures for

Concrete. Grout mix ratios shall be expressed in cubic feet (cf) of water to bag of cement to cubic feet bulk filler [W (cf):C (bag):BF (cf)]. Grout mix shall meet the following requirements:

a. Grout mix shall have a minimum water to cement ratio of 0.5 and a maximum water to cement ratio of 1.0. Other additives will be expressed in pounds, gallons, or pints to one bag of cement.

b. Marsh Funnel time shall be between 40 and 90 seconds when tested in accordance with ASTM D6910. Contractor shall perform this testing in the presence of the COR for each proposed grout mix.

c. Grout mix shall have a maximum bleed of 2 percent when tested in accordance with ASTM DC940. Contractor shall perform this testing in the presence of the COR for each proposed grout mix.

d. Collect six (6) 2-inch by 4-inch cylinders per mix. Perform compressive strength testing at 3, 7, and 28 days in accordance with ASTM C39. The remaining three cylinders will be kept for backup. Proposed grout mix shall have a minimum compressive strength of 1,000 psi.

6) Provide mixer of the high-speed colloidal type, equipped with a high-speed diffuser centrifugal pump. Mixer shall be designed to mix cement, water, and bulk fillers thoroughly, and to produce a grout of uniform texture at the specified mix ratios. Provide one water flow meter. The water flow meter shall be graduated in tenths of gallons or hundredths of cubic feet and shall be able to be reset.

7) Prior to beginning grouting operations, the Contractor shall flush the trench drain pipes with water and remove foreign objects and sediment. Flushing methods shall use low pressure to not cause erosion of embankment soils. Flushing methods which may result in damage to the existing drain pipes and/or erosion of embankment soils will not be permitted.

8) Following flushing, the Contractor shall inspect the full length of each drain pipe using appropriate video equipment. The video inspection footage shall be provided to the COR for review and approval prior to grouting. Additional cleaning of the pipe may be required, as determined by the COR, after review of the video inspection footage.

9) After cleaning the existing pipes, the Contractor shall close the remaining existing drain pipes by placing grout through a tremie pipe that extends to the end of the existing drain pipes.

Abandon the existing toe drain collector and outlet pipes such that the pipe is filled with the approved non-shrink grout mix without air voids. Remove tremie pipe sections as needed while keeping the end of tremie pipe in contact with the grout. The grout shall fill the entire existing drain pipes. When filled, check that the end cap is secure on the end of each drain pipe. The injected grout volume shall be no less than the sum of the theoretical collector pipe and outlet pipe volumes. Continue pumping until grout daylights at the upper end of the segment. Monitor grout pressure at the bulkhead installed at the outlet. Maintain 2 psi of grout pressure at the pipe outlet for a minimum of 10 minutes with zero pressure loss, at which point abandonment shall be considered complete. This procedure may be altered in the field by the COR to suit the conditions encountered and to meet the design objectives.

Changes in the grout mix and grouting procedure shall be made when and as directed by the

COR, and shall not be made without the approval of the COR.

10) Grout pressure shall not exceed 2 psi at the header unless specifically authorized by the

COR. The pumping rate shall not exceed 3 cubic feet per minute (cfm).

11) The quantity of grout prepared in advance shall be kept to a minimum. Grout which has been kept in the mixer with or without agitation for longer than one hour shall be discarded, unless

3-6 otherwise directed by the COR. For each pipe, grout placement shall occur during one continuous operation with no break in work shifts.

12) Grout temperatures shall be not lower than 50 degrees F and not higher than 90 degrees F at time of placement.

13) The Contractor shall keep a complete and accurate record of all grouting operations. This record shall include a time log of the grout mixes and admixtures used, the related pressures and grout take rates, back pressures, and observations on excessive leakage and other non-routine conditions. One copy of the records shall be furnished to the COR at the end of each shift, or as directed.

14) The Contractor shall demonstrate to the satisfaction of the COR that the existing drain pipes are entirely filled with grout as defined. After the drain pipes are entirely filled with grout, install one new, permanently secured end cap at the outlet end of each drain pipe.

15) After grouting is completed, the Contractor shall remove the grouting plant and all related parts, equipment, and supplies from the site, including unused materials and waste that is unsightly or would interfere with efficient operation by others.

16) In Section 6 – Measurement and Payment, Method 2 will apply.

17) Items subsidiary to this Bid Item include:

a. Water for Construction, Construction Specification 10 – Water for Construction

**End of Construction Specification 3**

(210-VI-NEH, January 2014) 5-1

CONSTRUCTION SPECIFICATION 5—POLLUTION CONTROL

Scope

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.

The following BioPreferred® product categories are applicable to this specification: — mulch and compost materials:

– erosion control materials

– fertilizers

– dust suppressants

– agricultural spray adjuvants

Material

Silt fence shall conform to the requirement of Materials Specification 592, Geotextile. All other material furnished shall meet the requirements of the material specifications listed in Section 8 of this specification.

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 silt fences trap sediment from areas of limited runoff.

Sediment filters shall be properly anchored to prevent erosion under or around them. Silt fences shall be installed and maintained in accordance with ASTM D6462. 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.

(210-VI-NEH, January 2014) 5-2

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

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.

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.

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.

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. Payment for each item is made at the contract unit price for that item. For water or chemical suppressant items used for dust control for which items of work are established in section 8 of this specification, measurement for payment will not include water or chemical suppressants that are used inappropriately or excessive to need. Such payment will constitute full compensation for the completion of the work.

Method 2—For items of work for which lump sum prices are established in the contract, payment is made as the work proceeds and supported by invoices presented by the contractor that reflect actual costs. If the total of all progress payments is less than the lump sum contract price for this item, the balance remaining for this item will be included in the final contract payment. Payment of the lump sum contract price will constitute full compensation for completion of the work.

Method 3—For items of work for which lump sum prices are established in the contract, payment will be prorated and provided in equal amounts on each monthly progress payment estimate. The number of months used for prorating shall be the number estimated to complete the work as outlined in the Contractor's approved construction schedule. The final month's prorate amount will be provided with the final contract payment. Payment as described will constitute full compensation for completion of the work.

(210-VI-NEH, January 2014) 5-3

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 items to which they are made subsidiary, are identified in Section 8 of this specification.

Assunpink Creek Watershed 8 Dam Rehabilitation Project 5-4

Items of work and construction details

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

A. Bid Item 4 – Pollution Control

1) The item shall consist of scheduling operations, obtaining the required permits, performing work and installing, maintaining, and removing temporary erosion and sediment control measures to control erosion and minimize the production of sediment and other pollutants to water and air from construction activities as specified herein and in accordance with all applicable New Jersey Department of Agriculture “Standards for Soil Erosion and Sediment Control in New Jersey (2017 Revision) and County Conservation District rules, regulations, and permits.

2) The Project Sponsors have obtained the Stormwater Construction General (5G3) permit from the NJDEP and have paid the applicable permit fees. The permit approval is based on the Soil Erosion and Sediment Control (SESC) plan shown on the Drawings. The Contractor is responsible for implementation and maintenance of the SESC controls in accordance with the Drawings and these Specifications.

3) The Contractor shall prepare and submit a Pollution Control Plan (Plan) to the COR for approval within 30 days of contract award. The Plan shall supplement the approved erosion and sediment control measures and plan shown on the Drawings. This Plan shall include fill stockpile area(s), proposed equipment and material staging and storage area(s), vehicle and equipment maintenance area(s), vehicle and equipment fueling area, material staging area(s), and dewatering effluent filtering methods and locations. Product data sheets for all pollution control measures required and/or proposed, including those in the approved erosion and sediment control plan, shall also be included in the Plan.

4) Pollution Control measures to address high acid-producing soils (high acid-producing soils are soils with a pH of 4.0 or less or contain iron sulfide) are NOT included in this Bid Item.

Pollution Control measures to address high acid-producing soils are included in Construction Specification 21, Excavation, Supplemental Bid Item 201 – Stockpiling Acid-Producing Soils, and Construction Specification 23, Earthfill, and Supplemental Bid Item 202 – Lime-Treated Earthfill.

5) Land and water resources within the work limits but outside the limits of permanent work shall be preserved in their present condition or shall be restored to a condition that will appear to be natural and not distract from the appearance of the project.

6) The location of the Contractor’s camps, access and haul roads, storage, and other construction buildings, required temporarily in the performance of the work, shall be detailed in the Plan and approved by the COR prior to installation.

7) The Contractor shall not deface, injure, or destroy trees or shrubs beyond the limits shown on the Drawings, nor remove or cut them without special authority. No ropes, cables, or guys shall be fastened to or attached to any existing nearby trees for anchorage unless authorized by the COR.

8) Monuments, markers, works of art, and sites of natural, historical, or archaeological significance (if present) shall be protected before beginning operations near them.

9) In Section 2 – Material

a. In addition to the following material requirements, all vegetative and structural erosion and sediment control practices shall be constructed and maintained according to minimum standards and specifications of the latest version of the New Jersey Department of Agriculture Soil Erosion and Sediment Control Standards. The most recent version at the time of bid advertisement of referenced Specifications shall apply and are available on the DEP and Department of Agriculture web sites.

b. Silt Fence shall have a minimum height as shown on the Drawings. Wooden stakes

Assunpink Creek Watershed 8 Dam Rehabilitation Project 5-5 shall be 2 inches by 2 inches by 48 inches. The Contractor shall maintain a stockpile of 50-LF of Silt Fence on site for use as needed to avoid material delivery delays.

c. Temporary Construction Entrance shall meet the quality requirements of latest version of the New Jersey Department of Agriculture Soil Erosion and Sediment Control Standards.

d. Erosion Control Blanket shall consist of Type 2.D Short-Term Temporary Rolled Earth Erosion Control Product (RECP) meeting the requirements of the latest version of the New Jersey Department of Agriculture Soil Erosion and Sediment Control Standards.

The product shall contain 100% agricultural straw and two organic jute nets securely sewn together with biodegradable thread. Polypropylene netting is prohibited. Provide biodegradable stakes.

e. Pumped Water Filter Bag shall meet the requirements shown on the Drawings.

f. Temporary seeding and permanent seeding shall consist of the seed mixes shown in Construction Specification 6, Seeding, Sprigging, and Mulching and on the Drawings for the applicable times of year.

g. Concrete Washout shall meet the requirements shown on the Drawings.

10) In Section 3 – Erosion and Sediment Control Measures and Works

a. Install Silt Fence to the limits shown on the Drawings. The barrier shall meet flush with existing grade. Riprap or other materials shall be removed to accommodate a uniform grade for the installation. Support stakes shall be driven to the required depth below the existing ground surface at the intervals shown on the Drawings.

b. Silt fence shall be installed to the limits shown on the Drawings and shall be installed in accordance with the details shown on the Drawings.

c. The Contractor shall install, maintain, and remove erosion control measures to protect wetland areas designated on the drawings.

d. The Contractor shall install erosion control measures prior to, during, and after any earth disturbance and perform maintenance and corrective actions as deemed necessary by the COR and authorities having jurisdiction during and after installation of erosion control measures.

e. The formation of concentrated flows on the drainage slope above the Silt Fence or other measures are not permitted. If concentrated flow does occur, direct slope stabilization measures shall be employed to prevent such conditions.

f. The temporary access road shall be constructed as shown on the Drawings.

g. Riprap stream protection shall be provided at the discharge end of the pump around shall be constructed as shown on the Contractor’s Pollution Control Plan.

h. Surface water shall be diverted away from excavations by means of diversion ditches and diversion berms.

i. During dewatering operations, the effluent shall be filtered through a pumped water filter bag approved by the erosion control permitting agency or pumped into a temporary sediment trap that has been constructed in accordance with latest version of the New Jersey Department of Agriculture Soil Erosion and Sediment Control Standards and shall be removed in their entirety from the site following completion of the work.

j. The Contractor shall schedule and conduct his operations to limit erosion of soils, and to prevent silting and muddying of downstream systems.

k. Construction of drainage facilities and performance of work that will contribute to the control of erosion and sedimentation shall be carried out in conjunction with earthwork

Assunpink Creek Watershed 8 Dam Rehabilitation Project 5-6 operations, or as soon thereafter as practicable. The area of bare soil exposed at any one time by construction operations shall be limited. If bare areas are left exposed and undisturbed for 7 days, the Contractor shall immediately perform temporary seeding and stabilization.

l. The tires of all vehicles shall be cleaned prior to leaving the site. In the event that sediment is inadvertently tracked onto roadways, Contractor shall clean roadway in accordance with NJ Department of Agriculture requirements.

m. All access and haul roads used during construction shall have cross drains installed in all drainage ways. Road surfaces shall be free draining. Concentrations of water shall be directed into stabilized water courses or piped to stable outlets. Debris shall be disposed of at an approved landfill.

n. Concrete washdown of tools, concrete mixer chutes, hoppers, and the rear of vehicles shall be performed at the concrete waste management location identified in the approved Pollution Control Plan. Washout of the concrete mixer drum at the construction site is prohibited.

o. The Contractor shall not stockpile equipment, topsoil, materials, etc. in otherwise undisturbed areas and areas indicated for the preservation of existing vegetation.

p. Temporary soil stockpiles shall be stabilized with temporary seeding and mulching and protected with compost filter sock as shown on the Drawings.

q. All graded areas that are at final grade must be seeded and mulched within 7 days and areas that will not be worked again for 21 days or more shall have temporary seeding and mulching within 7 days as outlined in Construction Specification 6, Seeding, Sprigging, and Mulching.

r. The project site shall be available at all times for inspection by authorized employees of NJDEP and the Project Sponsors.

s. The Contractor shall always maintain copies of the approved Pollution Control Plan and SWPPP on site.

t. Should any specified measures prove incapable of adequately removing sediment from on-site flows prior to discharge of stabilizing the surface involved, additional measures shall be immediately implemented to address such problems. All costs for any additional measures are not eligible for additional compensation from the Federal Government or Project Sponsors.

11) In Section 4 – Chemical Pollution

a. All discharges leaving the site shall be composed entirely of storm water and natural stream flow, with the exception of discharges from firefighting activities; fire hydrant flushing; potable water sources including water line flushing; irrigation drainage; air conditioning condensate; springs; uncontaminated ground water; and foundation or footing drains where flows are not contaminated with process materials or pollutants.

b. Pollutants such as fuels, lubricants, bitumens, raw sewage, and other harmful materials shall not be discharged into or near rivers, streams and impoundments, or into natural or man-made channels leading thereto.

c. All applicable regulations of fish and wildlife agencies and statutes relating to the prevention and abatement of pollution shall be complied with.

d. Sanitary facilities such as chemical toilets, and sumps, tanks, or barrels used to temporarily store chemical pollutants such as drained lubricating oils, shall be disposed of in accordance with applicable regulations of the State of New Jersey.

12) In Section 5 – Air Pollution, there are no firebreaks or guards to be constructed.

13) In Section 6 – Maintenance, Removal, and Restoration

Assunpink Creek Watershed 8 Dam Rehabilitation Project 5-7

a. Until the site is stabilized, all erosion and sedimentation control measures shall be maintained properly. Maintenance shall include inspection of all erosion and sedimentation control on a weekly basis and within 24 hours after each runoff event.

All prevention and remedial maintenance work, including clean out, repair, replacement, regrading, reseeding, remulching, and renetting, shall be performed immediately and shall meet the standards of the latest version of the New Jersey Department of Transportation Soil Erosion and Sediment Control Standards.

b. Any disturbed area on which activity has ceased and that will remain exposed for more than 21-days shall be seeded and mulched immediately. Apply temporary seed mix and mulch as specified in Subsidiary Item – Temporary Seeding and Mulching, Construction Specification 6 – Seeding, Sprigging, and Mulching. During non-germinating periods, mulch shall be applied. A permanent vegetative cover shall be applied to areas that will be left unworked for a period of more than 6 months. Areas mulched during the non-germinating period of December 1st to March 1st shall be limed, fertilized, seeded, and mulched by April 20.

c. All temporary erosion and sediment control measures shall be removed within 30 days after final site stabilization as determined by the Contracting Officer.

14) In Section 7 – Measurement and Payment, Method 3 will apply.

15) Items of work subsidiary to this Bid Item are:

a. Water for Construction, Construction Specification 10 – Water for Construction.

b. Temporary Seeding and Mulching, Construction Specification 6 – Seeding, Sprigging, and Mulching.

**End of Construction Specification 5**

Assunpink Creek Watershed 8 Dam Rehabilitation Project 5-8

(210-VI-NEH, Amend. 2, Sept. 2018) 6-1

CONSTRUCTION SPECIFICATION 6—SEEDING, SPRIGGING, AND MULCHING

1. Scope

The work consists of preparing the area for treatment; furnishing and placing seed, sprigs, mulch, fertilizer, inoculant, 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 must conform to the current rules and regulations of the State where it is being used and must be from the latest crop available. It must meet or exceed the standard for purity and germination listed in Section 7.

Seed must be labeled in accordance with State laws and U.S. Department of Agriculture rules and regulations 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 may be accepted with a test date of more than 9 months before the date of delivery 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 must be as defined in the current State laws relating to agricultural seeds. Each type of seed must be delivered in separate sealed containers and fully tagged unless an exception is granted in writing by the Contracting Officer.

Fertilizer—Unless otherwise specified, the fertilizer must be a commercial-grade fertilizer. It must meet the standard for grade and quality specified by State law. Where fertilizer is furnished from bulk storage, the contractor must furnish a supplier’s certification of analysis and weight. When required by the contract, a representative sample of the fertilizer must be furnished to the Contracting Officer for chemical analysis.

Inoculants—The inoculant for treating legume seeds must be a pure culture of nitrogen-fixing bacteria prepared specifically for the species and must not be used later than the date indicated on the container or as otherwise specified. A mixing medium, as recommended by the manufacturer, must be used to bond the inoculant to the seed. Two times the amount of the inoculant recommended by the manufacturer must be used, except that four times the amount must be used when seed is applied using a hydraulic seeder. Seed must be sown within 24 hours of treatment and must not remain in the hydraulic seeder longer than 4 hours.

Lime and other soil amendments—Lime must consist of standard ground agriculture limestone, or approved equivalent. Standard ground agriculture limestone is defined as ground limestone meeting current requirements of the State department of agriculture. Other soil amendments must meet quality criteria and application requirements specified in Section 7.

Mulch tackifiers—Asphalt emulsion tackifiers must conform to the requirements of ASTM D977, Specification for…