A05_ATTACHMENT_002_-_Statement_of_Work.pdf

GREAT SMOKY MOUNTAINS NATIONAL PARK

Newfound Gap Wastewater Rehabilitation Project

Date: October 23, 2024

PMIS 304884

The Great Smoky Mountains National Park Newfound Gap Wastewater System Rehabilitation Project

Gatlinburg, TN 37738

PMIS # 304884

October 23, 2024

Table of Contents

Specification Section Issued

Division 1 – General Requirements

Section 01100 – Summary of Work Award Section 01270 – Price and Payment Award Section 01310 – Project Management and Coordination Award Section 01330 – Submittal Procedure Award Section 01430 – Quality Assurance Award Section 01600 – Materials and Equipment Award Section 01770 – Project Closeout Award

Division 2 – Site Work

Section 02110 – Site Clearing Award Section 02315 – Excavation, Trenching, and Backfill Award Section 02370 – Temporary Erosion Control Award Section 02372 – Environmental Protection Award Section 02530 – Sanitary Sewer Award Section 02532 – Sewer Manholes Award Section 02920 – Topsoiling, Seeding, Fertilizing Award Section 02958 – Pipe Bursting Award

Division 03 –Concrete

Section 03300 – Cast in Place Concrete (Non-Structural) Award

10/23/2024 01100 Summary of Work - 1 of 4

GRSM 304884

SECTION 01100

SUMMARY OF WORK

PART 1 - GENERAL

1.01 SUMMARY

A. The work to be performed under this contract shall consist of furnishing the following to perform the work outlined in these specifications and as indicated by Project Drawings (133/60155):

1. tools

2. equipment

3. materials

4. labor

5. supplies

6. manufactured articles

7. all transportation to complete the work

8. temporary facilities

B. Location of Work: Newfound Gap Overlook Area, Great Smoky

Mountains National Park.

C. Incidental Items: All work, materials, and services not expressly listed as being provided by others or not expressly called for in the contract but are necessary for the completion of the work in good faith, shall be furnished, installed, and performed by the contractor.

1.02 BACKGROUND

A. The Newfound Gap Overlook Area is one of the oldest areas in the

Park. The Newfound Gap Wastewater System was designed and built in the late 1930’s during the early years of Great Smoky Mountains National Park. This system serves the Newfound Gap rest area, which resides at the top (elevation) of Newfound Gap Road at the Tennessee and North Carolina border. It is also the highest elevation point along the entire Appalachian Trail. This area is a primary destination location in the middle of the park offering stunning views of the surrounding mountains to millions of visitors each year.

The picnic area was constructed in the early 1960’s and underwent a renovation in the late 1990’s. Little has changed in the systems distribution system and upgrades are needed for more efficient operation.

10/23/2024 01100 Summary of Work - 2 of 4

1.03 SCHEDULING

A. The Newfound Gap Overlook comfort station open year-round. The proposed work will be done while the comfort station is in use;

therefore, the contractor shall either maintain operation or provide temporary toilet facilities. The contractor is expected to be courteous to the Park’s visitors; and provide appropriate barriers and protection.

1.04 SUMMARY OF WORK TO BE DONE BY CONTRACTOR

A. Sewer System Improvements

1. Provide and install a new 5,000-gallon septic tank as illustrated on the design plans.

2. Provide and install new manholes and sewer pipe as illustrated on the plans.

3. Pipe-burst and line the existing 6” main line sanitary sewer with 6” HDPE, SDR 26 pipe.

4. Provide and install a new flow diversion structure to provide alternating use of the existing and proposed septic tanks.

5. Install 2 new dosing siphons in the existing dosing tank.

6. Install new precast concrete (or cast-in-place) lids and an aluminum access hatch on the existing dosing tank.

7. Replace the plastic valve box lids with cast-iron lids.

8. Remove the existing chain link fence and install a new chain link fence. A 12-foot wide vehicle gate and a 4-foot wide man-gate shall also be provided.

9. Restore all disturbed areas, and hydroseed with the approved Park seed mix.

1.05 SPECIAL CONSTRUCTION REQUIREMENTS

A. The Great Smoky Mountains National Park is a visitor friendly environment.

10/23/2024 01100 Summary of Work - 3 of 4

1. Provide barriers to protect the public and control visitor access.

2. Coordinate with Park when commercial vehicles will enter the Park.

1.06 SAFETY

A. The contractor shall provide a Safety Plan prior to the commencement of work. The Safety Plan shall address employee safety practices for all phases of the proposed work; and shall be accessible to all on-site personnel.

B. All aspects of jobsite safety are the responsibility of the contractor.

Sub-contractors, regardless of being an excluded party (i.e. owner of company), are required to follow all Federal, State, and Local safety laws. This includes, but is not limited to:

1. Fall Protection

2. Trench Safety

3. Hard hats

4. Eye Protection

1.07 DISTURBED AREAS

A. All areas that are disturbed by the contractor are to be returned to their original condition or better. This includes, but is not limited to:

1. Sidewalks

2. Roadways

3. Grass

4. Vegetation

END OF SECTION

10/23/2024 01100 Summary of Work - 4 of 4

This Page Intentionally Left Blank

10/23/2024 01270 Price & Payment.doc- 1 of 6

SECTION 01270

PRICE AND PAYMENT

A. Work covered by this section includes method of measurement and basis of payment for all divisions included.

B. Payment for the various items of the Schedules, as further specified herein, shall include all compensation to be received by the contractor for furnishing all tools, equipment, materials, labor, supplies, manufactured articles, transportation, and temporary facilities required to complete the work in accordance with contract documents including incidentals.

C. Respective prices and payment shall constitute full compensation for all work completed including incidentals.

D. All items not expressly listed as being provided by others that are necessary for the completion of work shall be furnished and installed by the contractor.

1.02 ESTIMATED QUANTITIES

A. All quantities stipulated in the schedule or other contract documents are approximate and are to be used: (1) as a basis for estimating the probable cost of the work and (2) for the purpose of comparing the bids submitted.

B. The contractor shall be paid based upon a lump sum contract for this project.

Partial payments will be based upon actual quantities installed during the time-period addressed by the invoice. Quantities included in the invoice will be measured in the field. The actual amounts of work completed and materials furnished may differ from estimated quantities. The contractor shall make no claim for damages, anticipated profits, or otherwise, on account of differences between the estimated amounts and the actual amount of work performed and materials furnished.

1.03 SURVEY AND MEASUREMENTS

A. All quantity measurements shall be the responsibility of the contractor and will be verified by the COTR.

B. All measurements and subsequent payments will be based on completed and accepted work performed in strict accordance with the drawings, specifications, and other contract documents.

10/23/2024 01270 Price & Payment.doc- 2 of 6

PART 2 – SCHEDULE ITEMS

2.01 GENERAL

A. Payment shall be full compensation to complete the work items in good faith, including incidental work.

B. In addition to the those things listed under each item, the unit price shall be full compensation for all of the following:

1. General requirements in Division 01, but not limited to the following.

a. Submittals

b. Record drawings

c. Schedules and Plans

2. Specific requirements in Division 02, including but not limited to the following (unless otherwise expressly defined as a line item in the bid schedule):

a. Erosion control

b. Clearing and grubbing

c. Removal and replacement of obstructions

d. Associated trenching, excavation and backfill including the removal of any nuisance water, bedding, haunching, and compaction.

e. Disposal of any excess material

f. Traffic control

g. Rough grading

h. Finish work, where called for, including finish grading, topsoiling, and landscaping

2.02 ITEMS

A. Sewer System Improvements Schedule

1. Mobilization

a. Measurement: By the Lump Sum.

b. Basis of Payment: Includes all labor, materials, equipment, tools and all other appurtenances required to transport equipment, materials, and/or staff to the job site.

2. 4” PVC, SDR 35 Pipe

a. Measurement: By the linear foot as installed measured horizontally along the length of the line.

10/23/2024 01270 Price & Payment.doc- 3 of 6

b. Basis of payment: Includes all labor, materials, equipment, tools and other appurtenances required to complete the installation and testing of the pipe.

3. 6” PVC, SDR 35 Pipe

c. Measurement: By the linear foot as installed measured horizontally

d. Basis of payment: Includes all labor, materials, equipment, tools and

4. 6” HDPE, SDR 26 Pipe (Lining for Pipe-Bursted Lines)

e. Measurement: By the linear foot as installed measured horizontally

f. Basis of payment: Includes all labor, materials, equipment, tools and

5. Sanitary Sewer Manholes – 4 Ft. Dia.

a. Measurement: Measured per manhole installed.

other appurtenances required to complete the installation of the manholes.

6. Flow Diversion Manhole

a. Measurement: Measured per Flow Diversion Manhole installed.

b. Basis of Payment: Includes all fittings, base and backfill stone, custom flow diversion assembly, access frame and grate and all other appurtenances required to complete the work as specified.

7. Precast Concrete Septic Tank

a. Measurement: Measured per each septic tank

b. Basis of payment: Includes all labor, materials, equipment, tools, base and backfill stone, and other appurtenances required to provide and install the installation of each septic tank.

10/23/2024 01270 Price & Payment.doc- 4 of 6

8. Dosing Tank Aluminum Access Hatch

a. Measurement: Measured per each access hatch installed.

other appurtenances required to complete the installation of the hatch.

9. Dosing Tank Cast Iron Frame and Lid

a. Measurement: By the Lump Sum for each lid provided and installed. .

b. Basis of Payment: Includes all labor, materials, equipment, tools and all other appurtenances required to provide and install the frame and lid.

10. Dosing Tank Dosing Siphons

a. Measurement: Measured per each dosing siphon provided and installed in the dosing tank.

b. Basis of Payment: Includes all pipe, fittings, flushing, pressure testing, and all other appurtenances required to complete the installation of the dosing siphon in the dosing tank as specified.

11. 6’ x 4’ Precast Concrete Lid

a. Measurement: Per each installed.

b. Basis of Payment: Includes the precast (or poured in place) concrete lid provided and installed on the dosing tank per the construction plans. Price included removing and disposing of the existing lid off-site in an approved landfill. Contractor shall field verify all dimensions to insure a solid fit on the existing dosing tank.

12. 8’ x 4’ Precast Concrete Lid

c. Measurement: Per each installed.

c. Basis of Payment: Includes the precast (or poured in place) concrete lid provided and installed on the dosing tank per the construction plans. Price included removing and disposing of the existing lid off-site in an approved landfill. Contractor shall field verify all dimensions to insure a solid fit on the existing dosing tank.

10/23/2024 01270 Price & Payment.doc- 5 of 6

13. Cast Iron Meter Box Lid

d. Measurement: By each installed.

e. Basis of Payment: Includes providing the appropriately sized cast iron lid and installing the lid on the existing HDPE valve box. The specified lids are designed specifically for HDPE valve boxes. Work also included removing and disposing of the existing HDPE lids in an approved landfill.

14. Chain Link Fence

a. Measurement: Lump Sum payment for the fence to surround the subsurface drain field.

b. Basis of Payment: Includes all posts, footings, supports, connections, and appurtenances required to complete the work as specified.

15. 12 Foot Double Swing Gate

a. Measurement: By each installed.

b. Basis of Payment: Includes all fence material, posts, concrete, supports and other appurtenances required to complete the work as specified.

16. 4 Foot Man-Gate

a. Measurement: By each installed.

b. Basis of Payment: Includes all fence material, posts, concrete, supports and other appurtenances required to complete the work as specified.

17. Restoration/Hydroseeding

a. Measurement: Lump Sum.

b. Basis of Payment: Includes fine-grading and hydroseeding all disturbed areas, removal of all erosion control materials and construction debri, and providing the asphalt surface course mix, and placement to repair all existing disturbed and/or damaged asphalt walkway areas. All asphalt work shall be done in accordance with the Tennessee Department of Transportation Standard Specifications.

10/23/2024 01270 Price & Payment.doc- 6 of 6

10/232/2024 01310 Project Management and Coordination.doc Page 1 of 2

SECTION 01310

PROJECT MANAGEMENT AND COORDINATION

A. Section includes the preconstruction conference, construction scheduling and coordination requirements.

1.02 PRE-CONSTRUCTION CONFERENCE

A. Required after award of contract and prior to start of construction.

B. Representatives from the following shall attend.

1. Prime Contractor

2. Subcontractors

3. Owner

C. Contracting Officer/ COTR will arrange a date that is mutually acceptable to all parties planning to attend.

D. Contractor shall notify subcontractors of time and date of meeting.

1.03 CONSTRUCTION SCHEDULE

A. Present project engineer with a written preliminary construction schedule (Critical Path Method) containing start and completion dates of the major items at the preconstruction meeting.

B. Notify the COTR three full working days in advance of any construction.

C. Communicate major changes to the schedule to the COTR in writing.

1.04 COORDINATION WITH OTHER CONTRACTORS/UTILITIES

A. Coordinate work with other contractors (i.e. roads, building, etc) in the area as necessary to complete the work specified.

B. Coordinate work with local utilities (i.e. water and sewer, power, telephone).

Note: all buried utilities may not be shown on the plans. Contractor’s responsibility for having utilities marked prior to construction.

10/232/2024 01310 Project Management and Coordination.doc Page 2 of 2

10/23/2024 01330 Submittal Procedure - 1 of 2

SECTION 01330

SUBMITTAL PROCEDURE

A. This section includes information on submittal procedures. All items noted in Section 01270, Price and Payment require submittals.

1.02 SUBMITTAL PROCEDURES

A. Submit an electronic copy (Word or pdf file) to the COTR via email, unless requested otherwise.

B. Identify each cut sheet or shop drawing with the following information:

1. Contract number.

2. Supplier.

3. Specification section to which the submittal pertains.

C. Submit the following information, as applicable:

1. Manufacturer’s cut sheets indicating compliance with references (e.g.

applicable ASTM, AWWA standards).

2. Laboratory results, as applicable.

3. Dimensional drawings or shop drawings, as applicable.

4. Other information necessary for the Project Engineer to determine compliance with the specifications.

D. Variations from the contract documents or products specified:

1. Bring any and all submitted variations to the attention of the Contracting Officer.

2. Variations not brought to the Contracting Officer‘s attention, in writing, and that conflict with the Contract Documents, do not relieve the contractor from the requirements of the contract documents.

E. Revise and resubmit submittals as required and identify all changes made since previous submittal.

1. No additional contract time will be given for resubmittals required as a result of the contractor submitting incomplete or rejected submittals.

10/23/2024 01330 Submittal Procedure - 2 of 2

F. Distribute copies of reviewed submittals to concerned parties, (i.e. suppliers, sub-contractors).

G. Submit written communication of any inability to comply with the Project

Engineer’s comments.

H. Submit information to the Contracting Officer at least three weeks in advance of the work to be performed.

I. Approval of submittals must be provided by the Contracting Officer prior to installation of materials.

1.03 DEFINITIONS

A. Approved: Deemed to be acceptable for use in accomplishing the requirements of the plans and specifications, but does not extend to the means, methods, or procedures of construction (except where specific means, methods, or procedures are specifically required by the contract documents) and does not imply approval of the system or construction in which the submitted item is a part.

B. Conditionally Approved: Deemed to be acceptable for use in accomplishing the requirements of the plans and specifications, if the conditions noted in the submittal approval letter are met. The approval does not extend to the means, methods, or procedures of construction (except where specific means, methods, or procedures are specifically required by the contract documents) and does not imply approval of the system or construction in which the submitted item is a part.

C. Rejected: Deemed unacceptable for the use for which it was submitted.

D. Incomplete Submittal: Information is insufficient to ascertain acceptability.

Neither approval nor rejection is implied.

10/23/2024 01430 Quality Assurance.doc - 1 of 2

SECTION 01430

QUALITY ASSURANCE

A. This section includes prerequisites and procedures to assure the quality of construction.

1.02 CONTRACTORS QUALIFICATIONS

A. Work shall be performed by a registered contractor in the state where the project is proposed and for the type of construction and magnitude of construction being performed. The proposed project borders the Tennessee and North Carolina border; therefore, a contractor may be licensed in either state.

1.03 INSTALLER QUALIFICATIONS

A. Work shall be performed under the direction of personnel licensed in the state (Tennessee or North Carolina) where the project is proposed and where licensing of the trade is regulated by the state including, but not limited to, plumbing, well drilling, septic system installation, HVAC, and electrical work.

B. Where no license is required, work shall be performed under the direction of personnel certified by the manufacturer of the product where applicable.

1.04 CONTROL OF INSTALLATION

A. Review materials for acceptability when delivered to the site.

B. Store and handle materials to prevent damage.

C. Review materials, services, and workmanship to ensure that work is performed in accordance with the specifications.

D. Comply fully with manufacturers’ instructions.

E. Should manufacturers’ instructions conflict with contract documents, request clarification from Project Engineer before proceeding.

F. Correct defective work to the satisfaction of the Contracting Officer.

10/23/2024 01430 Quality Assurance.doc - 2 of 2

1.05 SAMPLES

A. When requested by the Contracting Officer, supply samples of materials proposed for use.

1.06 START-UP

A. Prior to start-up, ensure that all equipment is ready for its use, as designed.

B. Ensure that all power sources are balanced and ready for use.

C. Provide the services of manufacturers’ field representative for start-up, testing, and adjustment of all major equipment items.

D. Provide reports from the manufacturer, including their observations and documentation of workmanship to the Contracting Officer within 30 days of manufacturer’s visit, unless a sooner response is required by the applicable specification section.

E. Work will not be considered complete until all systems and subsystems have been tested for proper functionality and proper adjustment.

1.07 WARRANTY

A. Provide a minimum one (1) year warranty for all materials and labor, covering defects in the materials or deficiencies resulting from contractor installation.

B. Provide additional warranties as required by specific sections.

10/23/2024 01600 Material and Equipment.docx Page 1 of 3

SECTION 01600

MATERIAL AND EQUIPMENT

PART 1 GENERAL

A. The work of this section consists of the general procedures for handling, storing, and protecting material and equipment.

1.02 TRANSPORTATION AND HANDLING

A. Arrange deliveries of materials in accordance with construction schedules;

coordinate to avoid conflict with work and conditions at the site. Deliver materials in undamaged condition, in manufacturer's original containers or packaging, with identifying labels intact and legible. Contractor is encouraged to obtain materials in biodegradable or recyclable/reusable packaging which uses the minimum amount of packaging possible.

B. Newfound Gap Road, Route 441, is closed to commercial truck traffic without prior approval. All commercial delivery drivers shall contact the Park Dispatch Office at 865-436-1294 to notify Park staff of the commercial delivery.

Contractor shall also notify the COR of the pending commercial delivery. All deliveries in commercial vehicles shall take the shortest route through the Park to their destination. Contractor shall ensure that companies making deliveries are aware of the restrictions.

1.03 STORAGE AND PROTECTION

A. Store materials in accordance with manufacturer's instructions, with seals and labels accessible for inspection.

1. Materials stored on-site are the responsibility of the contractor. Items lost, stolen or damaged are the contractors responsibility until the items are installed AND accepted by the Contracting Officer. A material payment does not constitute acceptance of materials.

B. Exterior Storage:

1. Store products subject to damage by the elements in weather tight enclosures.

2. Store fabricated products above the ground, on blocking or skids; prevent soiling or staining. Cover products subject to damage or deterioration with impervious sheet coverings; provide adequate ventilation to avoid condensation.

10/23/2024 01600 Material and Equipment.docx Page 2 of 3

C. Protection after Installation:

1. Provide adequate coverings as necessary to protect installed materials from damage resulting from natural elements, traffic, and subsequent

10/23/2024 01600 Material and Equipment.docx Page 3 of 3

10/23/2024 01770 Project Closeout.doc Page 1 of 3

SECTION 01770

PROJECT CLOSEOUT

A. This section describes the requirements for final cleanup, closeout submittals and final inspection.

1.02 RELATED WORK

A. Section 01430 – Quality Assurance

1.03 DELIVERY

A. Provide all closeout submittals meeting these requirements and any specific requirements of each section.

B. All closeout submittals must be received in a correct and complete manner before final payment can be made.

1.04 DEFINITIONS

A. Record Drawing: A drawing showing the actual installation of facilities, showing changes from the plans; and showing detail enough that future persons can readily locate all objects.

B. Ties: Measurements from permanent easily located objects to an installed object.

PART 2 – PRODUCTS

2.01 CLEANING MATERIALS

A. As recommended by the manufacturer of surface to be cleaned.

PART 3 - EXECUTION

3.01 CLEANING

A. Before scheduling the final inspection, remove all tools, equipment, surplus materials, and rubbish. Restore or refinish surfaces that are damaged due to work of this contract to original condition. Remove grease, dirt, stains, foreign materials, and labels from finished surfaces.

Thoroughly clean building interiors. Pick up all construction debris from

10/23/2024 01770 Project Closeout.doc Page 2 of 3 the site. At time of final inspection, project shall be thoroughly clean and ready for use.

3.02 WARRANTIES

A. Submit all warranty information regarding the materials installed.

B. Minimum warranty information is listed in Section 01430. Specific warranties may be required for each Section of specifications.

3.03 OPERATION AND MAINTENANCE INFORMATION

A. Submit all operation and maintenance information as included in the packaging from the manufacturer regarding the materials installed.

10/23/2024 01770 Project Closeout.doc Page 3 of 3

10/23/2024 02110 - 1

GRSM 304884 SITE CLEARING

SECTION 02110

SITE CLEARING

PART 1 - GENERAL

1.1 SECTION INCLUDES

This specification shall govern all work necessary for clearing, grubbing, and stripping of objectionable matter as required to complete the project and shall include removing and disposing of trees, stumps, brush, roots, vegetation, rubbish and all other objectionable matter from the project site.

1.2 RELATED SECTIONS INCLUDE BUT ARE NOT NECESSARILY LIMITED

TO:

A. Section 02200 – Topsoiling and Earthwork.

B. Section 02260 - Finished Grading.

C. Section 02270 - Soil Erosion and Sediment Control.

PART 2 - PRODUCTS - (NOT APPLICABLE TO THIS SECTION)

PART 3 - EXECUTION

3.1 PREPARATION

A. Protect existing trees and other vegetation to remain against damage.

1. Provide temporary tree protection barriers prior to construction activities as shown on drawings.

2. Do not smother trees by stockpiling construction materials or excavated materials within drip line.

3. Avoid foot or vehicular traffic or parking of vehicles within drip line.

B. Repair or replace trees and vegetation damaged by construction operations.

1. Repair to be performed by a qualified tree surgeon per ANSI A300 1995 or most recent edition.

2. Remove trees which cannot be repaired and restore to full-growth status.

10/23/2024 02110 - 2

3. Replace with new trees of minimum 4 IN caliper per ANSI Z60.1, Nursery Stock. Plant per Park standards.

4. Excess material shall be placed in stockpiles which shall be located at a location approved by the Contracting Officer.

C. Place temporary erosion control measures such as silt fence around all stockpiles.

3.2 SITE CLEARING

A. Clearing and Grubbing:

1. Trees may be cut between November 15 and March 31. Outside of these dates any tree cutting shall require a “bat survey” which shall be coordinated with the COR.

2. Clear from within limits of construction all trees identified for removal.

a. Include shrubs, brush, downed timber, rotten wood, heavy growth of grass and weeds, vines, rubbish, structures and debris.

3. Grub (remove) from within limits of construction all stumps, roots, root mats, logs and debris encountered.

a. Grub areas to be paved to a depth 2 feet below natural ground.

b. Grubbing in non-paved areas:

1) In cut areas, grub to a depth 2 feet below natural ground.

2) In fill areas, where fill is less than 3 FT, grub ground to a depth 2 feet below natural ground.

3) Where fill is 3 FT or more in depth, stumps may be left no higher than 6 IN above existing ground surface.

B. Disposal of Waste Materials:

1. Do not burn combustible materials on site.

2. Remove all waste materials from site and dispose of properly.

3. Do not bury organic matter on site.

10/23/2024 02110 - 3

3.3 ACCEPTANCE

Upon completion of the site clearing, obtain contracting officer's acceptance of the extent of clearing, depth of stripping, and rough grade.

10/23/2024 02315 Excavation, Trenching & Backfill - 1 of 10

SECTION 02315

EXCAVATION, TRENCHING AND BACKFILL

A. This section includes excavation, trenching and backfill necessary for the construction of the facilities as indicated on the plans including, but not limited to: water mains and service lines, sewer mains and service lines, concrete manholes, septic tanks, and other structures.

1.02 RELATED WORK (as applicable)

A. Section 01119 – Revisions to Standard Specifications B. Section 01720 – Staking and Construction Surveying C. Section 01780 – Closeout Submittals D. Section 02310 – Grading E. Section 02316 – Rock Excavation F. Section 02370 – Temporary Erosion And Sediment Control G. Section 02510 – Water Distribution H. Section 02511 – Water Service Lines I. Section 02705 – Road Restoration J. Section 02920 – Topsoiling, Seeding, Fertilization and Mulching

1.03 REFERENCES

A. Manual on Uniform Traffic Control Devices.

B. ASTM D698 – Test Methods for Moisture Density Relations of Soils and Soil-

Aggregate Mixtures Using 5.5 lb. Rammer and 12-in. Drop [Standard Proctor Test].

C. ASTM D3035 – Underground installation of High-Density Polyethylene Pipe.

D. ASTM D2487 – Classification of Soils for Engineering Purposes [Unified Soil

Classification System].

1.05 DEFINITIONS

A. Bedding, Haunching and Initial Backfill zones as defined herein and on the standard thermoplastic pipe trench detailed drawing below.

10/23/2024 02315 Excavation, Trenching & Backfill - 2 of 10

B. Soil Materials as summarized in the table below and defined in ASTM D2321 and ASTM D2487

Description and Comparison of Soil Material Classifications

ASTM D2321 ASTM D2487

Class Type

USCS

Group Symbol Description

IA Manufactured aggregates: ¼ to 1 ½ inch open graded, clean.

* None Closest to “Poorly graded gravel (GP)”

IB Manufactured aggregates: ¼ to 1 ½ inch dense graded, clean.

* None Closest to “Poorly graded gravel with sand (GP)”

II

Coarse sands and gravels with maximum particle size of

1 ½ inch, clean.

GW Well-graded gravels and gravel-sand mixtures; little or no fines.

GP Poorly graded gravels and gravel sand mixtures;

little or no fines.

SW Well-graded sands and gravelly sands; little or no fines.

SP Poorly graded sands and gravelly sands; little or no fines

Coarse sands and gravels with maximum particle size of 1 ½ inch, borderline clean.

GW-GC

SP-SM

Etc.

Sands and gravels which are borderline between clean and with fines

III

Fine sand and clayey gravels.

GM Silty gravels, gravel-sand-silt mixtures.

GC Clayey gravels, gravel-sand-clay mixtures

SM Silty sands, sand-silt mixtures

SC Clayey sands, sand-clay mixtures

IV

Fine grained soils (inorganic)

ML Inorganic silts and very fine sands, rock flour, silty or clayey fine sands, silts with slight plasticity.

CL Inorganic clays of low to medium plasticity, gravely clays, sandy clays, silty clays, lean clays.

MH Inorganic silts, micaceous or diatomaceous fine sandy or silty soils, elastic silts.

CH Inorganic clays of high plasticity, fat clays.

10/23/2024 02315 Excavation, Trenching & Backfill - 3 of 10

V

Organic soils

OL Organic silts and organic silty clays of low plasticity.

OH Organic clays of medium to high plasticity, organic silts.

PT Peat and other high organic soils.

* USCS system is limited to naturally occurring soils. Manufactured aggregates not covered.

2.01 BEDDING, HAUNCHING AND INITIAL BACKFILL MATERIAL

A. Class I, Class II or Class III, utilized in accordance with restrictions described in Part 3 - Execution.

3.01 GENERAL

A. Trenching and excavation work shall be done in accordance with proper emphasis on safety as determined by the contractor to conform to recommended safety standards such as OSHA 1910 and 1926.

B. Obtain all permits from appropriate road agency for construction within road right of way.

C. Repair damage resulting from settlement, slides, cave-ins, water pressure, and other causes.

D. Provide adequate signs, barricades, fences and amber lights and take all necessary precautions to protect the work and the safety of the public in all construction areas.

1. Placement of construction signs and barricades shall conform to the

“Manual on Uniform Traffic Control Devices.”

2. Protect barricades and obstructions at night by amber signal lights that burn from sunset to sunrise. Barricades shall also be of substantial construction, painted white or with reflective paint to increase their visibility at night.

3. Perform work without obstruction to traffic or inconvenience to the general public and the residents in the vicinity of the work.

10/23/2024 02315 Excavation, Trenching & Backfill - 4 of 10

E. Road Crossing

1. Comply with all construction and material requirements of roadway authorities having jurisdiction.

2. Maintain one lane of traffic open at all times.

3. Refer to Section 02705 – Road Restoration for backfill and restoration requirements (where applicable).

3.03 EXCAVATION

A. All excavation shall be considered as “unclassified excavation”. No additional payment shall be made for rock excavation.

B. Remove stumps from excavation and site. Tree tops shall be ground or mulched up and may be spread in the woods to a depth of no more than 4”.

Tree trunks shall be cut into sections no longer than 10’ and laid flat in the woods.

C. Remove and stockpile existing topsoil.

D. Install facilities as staked unless otherwise approved by Project Engineer.

E. Maintain surface drainage away from trenching or excavation.

E. Remove unsuitable foundation materials from excavation as shown on the plans or as authorized by the Project Engineer.

F. Maintain a minimum 1-foot clearance between outer surface of structure being installed and wall of excavation.

G. Rock encountered shall be excavated and removed as necessary with no additional payment.

3.04 TRENCHING

A. All trench excavation shall be considered as “unclassified excavation”.

No additional payment shall be made for rock removal from trenches.

B. Bottom width: No less than 12 inches or more than 24 inches wider than the outside diameter of the pipe.

C. Depth: Provide minimum cover as specified, or depths shown on plans.

10/23/2024 02315 Excavation, Trenching & Backfill - 5 of 10

3.05 BEDDING

A. If existing soil cannot provide uniform, stable bearing support, over-excavate 6 inches below bottom of pipe or structure and provide bedding material.

B. Utilize Class I, II or III materials as appropriate for bedding as listed in Table below.

Use of Soils and Aggregate for Bedding Class IA Class IB Class II Class III

General Excellent pipe support. Excellent drainage.

Excellent pipe support. Good drainage. Minimizes migration of adjacent material.

Good pipe support. Fair drainage.

Reasonable pipe support. Poor drainage

Compaction Not required Not required Required 90% of Standard Proctor.

Required 90% of Standard Proctor.

Wet Conditions (below current or future water table). Rock Cuts

Acceptable. Must use same material for Haunching.

Acceptable. Must use same material for Haunching.

Acceptable. Clean groups only suitable for drainage blanket.

Not- Acceptable

Dry Conditions Acceptable Acceptable Acceptable Acceptable

3.06 HAUNCHING AND INITIAL BACKFILL

A. General

1. Provide complete and uniform bearing and support for the pipe, including allowance for bell holes, or structure.

2. Work material under and around the pipe to ensure full pipe support.

3. Prevent movement of the pipe during placement of material.

4. Avoid contact between the pipe and mechanical compaction equipment.

B. Utilize Class I, II or III materials as appropriate for haunching and initial backfill as listed in Table below. No frozen materials or frozen clods.

Use of Soils and Aggregate for Haunching and Initial Backfill Class IA Class IB Class II Class III

General Excellent pipe support. Excellent drainage. Install to a minimum of 6” above the pipe crown.

Excellent pipe support. Good drainage. Minimizes migration of adjacent material. Install to a minimum of 6” above the pipe crown.

Good pipe support. Fair drainage. Install and compact to a minimum of 6” above the pipe crown.

Reasonable pipe support. Poor drainage. Install and compact to a minimum of 6” above the pipe crown.

10/23/2024 02315 Excavation, Trenching & Backfill - 6 of 10

Compaction Not required Not required Required 85% of Standard Proctor.

6 inch maximum lifts.

Required 90% of Standard Proctor.

6 inch maximum lifts.

Wet Conditions (below current or future water table). Rock Cuts

Acceptable. Must use same material for Bedding.

Extend Haunching to the top crown of the pipe.

Acceptable. Must use same material for Bedding. Extend Haunching to the top crown of the pipe.

Acceptable. Clean groups only suitable for drainage.

Not- Acceptable

Dry Conditions Acceptable Acceptable Acceptable Acceptable

3.07 FINAL BACKFILL

A. Backfill remainder of excavation with native material, free from large clods, large stones, organic material or frost chunks.

B. Compact in 12-inch lifts to a density not less than the density of the surrounding undisturbed soil.

1. Compact with a mechanical tamper to a density not less than 90% of the maximum dry density, determined by ASTM D 698.

2. Provide 4 feet minimum cover over the top of the pipe before utilization of hydro-hammer compaction equipment.

3. Provide 3 feet minimum of backfill over the pipe before wheel loading the trench.

C. Conform to Section 02705 – Road Restoration for backfill requirements under roadways.

D. Backfill and compact around manholes, valve boxes, and other appurtenances in 12-inch lifts.

1. Compact with a mechanical tamper to a density not less than 90% of the maximum dry density, determined by ASTM D 698.

E. Backfill around septic tanks in 18-inch lifts.

1. Compact in a manner that will not produce undue strain on the tank.

2. Compaction may be accomplished with the use of water, provided the material is thoroughly wetted from the bottom up, and the tank is filled with water to prevent floating.

F. Repair any trenches improperly backfilled or where settlement occurs, then refill and compact.

10/23/2024 02315 Excavation, Trenching & Backfill - 7 of 10

G. Restore surface to the required grade and compaction. Conform to Section

02310 – Grading for rough grading, finish grading and site surface drainage.

H. Remove all surplus backfill materials to a location approved by the Engineer.

3.08 REMOVAL OF NUISANCE WATER

A. Remove nuisance water entering the trenches. Nuisance water that can be removed through the use of sump or trash pumps is not considered dewatering.

B. Keep trenches free from water until the facilities are in place, sealed against the entrance of water, and backfill has been placed and compacted above the water level.

3.09 LOCATE EXISTING UTILITIES

A. Field locate all existing underground utilities.

1. Utilize state “dig-safe” or “one-call” hotlines.

2. Contact all other utility owners not covered by the state “dig safe” hotlines.

3.10 UTILITY CONFLICTS

A. Protect existing utilities from damage during excavation and backfilling operations.

B. Provide temporary support for existing water, gas, telephone, power, or other utility services that cross the trench until backfilling of trench is complete

1. Compact backfill to 95% of Standard Proctor Density under disturbed utilities.

2. Repair or replace any damaged existing utilities, at no additional cost to the project.

C. Water and sewer main crossing and parallel installation

1. Maintain a 10-foot horizontal separation (O.D. to O.D.) for parallel mains.

2. Upon approval by the Engineer, water and sewer mains may be installed closer than 10-feet, provided all of the following conditions;

10/23/2024 02315 Excavation, Trenching & Backfill - 8 of 10

a. Vertical separation is 18 inches (O.D. to O.D.)

b. Water main is above the sewer main.

c. Separate trenches are maintained.

3. Maintain a minimum 18-inch vertical separation (O.D. to O.D.) for crossing mains.

a. Lay pipe with joints equidistant from the point of crossing.

4. If it is impossible to meet any of the above separation distances and deviations, one of the following methods shall be adhered to.

a. Sewer main shall be constructed to water main pressure pipe standards, and successfully pass a 150-psi pressure test prior to backfilling.

b. Either the water main or the sewer main may be encased in a watertight carrier pipe that extends 10 feet on both sides of the crossing. The carrier pipe shall be of materials approved by the regulatory agency for use in water main construction.

D. Water and sewer service crossing and parallel installation.

1. Maintain a 10-foot horizontal separation from water and sewer services.

2. Maintain an 18-inch vertical separation for crossing water and sewer services, with the sewer service below the water service

3. Water service line splices or joints will not be permitted within 10 feet of a sewer line crossing.

3.12 MOVING FENCES AND MINOR STRUCTURES

A. Remove and reset culverts, drainage pipes, gates or other minor structures that fall within the alignment of the new construction, to their original location and grade.

B. Visit the project site and determine actual conditions with regard to the existence of old car bodies, abandoned houses, fences, driveways, trees, stumps, brush, sidewalks, approaches, and other miscellaneous obstacles to

1. Unless specifically referenced in a bid item, no separate payment will be made for the removal or replacement of these items.

10/23/2024 02315 Excavation, Trenching & Backfill - 9 of 10

3.14 RECORDS

A. Conform to as-built requirements in Section 01780 – Closeout Submittals.

10/23/2024 02315 Excavation, Trenching & Backfill - 10 of 10

10/23/2024 02370 Temporary Erosion and Sediment Control - 1 of 4

SECTION 02370

TEMPORARY EROSION AND SEDIMENT CONTROL

A. This section includes erosion and siltation control measures accomplished through the use of interception embankments, berms, dikes, dams, silt fences, settling basins, slope paving, ditch checks, rip-rap, mulches, erosion mats, and other erosion control devices or methods.

1.02 RELATED WORK

A. Section 02310 – Grading

B. Section 02315 – Excavation, Trenching and Backfill

C. Section 02920 – Topsoiling, Seeding, Fertilizing and Mulching

A. North Carolina Division of Water Quality – Stormwater Best Management

Practices Manual

B. Tennessee Department of Environment and Conservation – Erosion and Sediment Control Handbook

C. Environmental Protection Agency - 1987 Congressional Amendments, Clean

Water Act, Section 402.

1.04 SUBMITTALS

A. Biodegradable Logs

B. Silt fence material, (or alternate erosion control material proposed).

C. Erosion Control Plan (If requested by the Project Engineer)

1.05 QUALITY ASSURANCE

A. Erosion control materials, methods and practices shall conform to the applicable state agency handbooks of Best Management Practices.

B. Obtain and pay for permits and inspections in accordance with the provisions of all local government agencies having jurisdiction. No additional claim for

10/23/2024 02370 Temporary Erosion and Sediment Control - 2 of 4 compensation will be allowed because of the contractor’s failure to obtain or pay for such permits and inspections.

PART 2 - PRODUCTS

2.01 POSTS

A. Wood or steel, 2” x 2” x 54” minimum.

2.02 EROSION BALES

A. Will only be allowed if made of non-grass material (no straw or hay)

2.03 SILT FENCING

A. 15 mil thick screen fabric with a minimum of 120 pounds of grab tensile strength and an equivalent minimum opening size of 170.

B. All seams shall be heat sealed or sewn.

2.04 BIODEGRADABLE LOG

A. Sized to accommodate drainage area.

B. Made of non-grass material (no straw or hay).

C. America Excelsior Company Curlex logs or equal.

2.05 OTHER

A. Other materials proposed by the contractor shall conform to standards published by the applicable state agency handbooks of Best Management Practices (BMP’s).

PART 3 – EXECUTION

3.01 GENERAL

A. Coordinate temporary and permanent erosion control measures to assure economical, effective and continuous erosion control.

B. Keep construction areas small.

C. Divert drainage away from construction areas.

10/23/2024 02370 Temporary Erosion and Sediment Control - 3 of 4

D. Perform construction in and adjacent to rivers, streams, lakes or other waterways in such a manner as to avoid washing, sloughing or deposition of material into waterways which will result in undue or avoidable contamination, pollution or siltation of such waterways.

E. Inspect and maintain erosion control materials to ensure its continued effectiveness.

1. Remove sediment material captured by erosion control systems when the silt reduces the remaining system capacity to 50% of the total system.

2. Inspect and repair erosion control systems within 48 hours of rain event.

F. Remove erosion control only after the area has stabilized and vegetation has developed to the extent that further erosion is unlikely.

G. Submit an erosion control plan in accordance with State BMP’s and Federal

EPA requirements, if the area to be disturbed is greater than 1 acre total.

3.02 TEMPORARY EROSION CONTROL

A. Use temporary erosion control measures to protect ditches and drainage ways as shown on the detailed drawings and as directed by the project engineer.

B. Biodegradable Logs

1. Place logs at right angles to the direction of flow.

2. Securely anchor each log with stakes as shown on the plans.

C. Silt Fencing

1. Place silt fences in an arc or horseshoe shape with the ends pointing up towards the slope.

D. Spoil and Material piles

1. Cover all soil/gravel piles with a tarp(s) at the end of each day.

10/23/2024 02370 Temporary Erosion and Sediment Control - 4 of 4

10/23/2024 02372 Environmental Protection – Page 1 of 5

SECTION 02372

ENVIRONMENTAL PROTECTION

PART 1 – GENERAL

1.01 SECTION INCLUDES

A. Requirements for prevention of environmental pollution and damage as the result of construction operations under this Contract.

1.02 RELATED WORK

A. Section 02310 – Grading

B. Section 02315 – Excavation, Trenching, and Backfilling

1.03 SYSTEM DESCRIPTION

A. Environmental pollution and damage are defined as the presence of chemical, physical, or biological elements or agents which adversely affect human health or welfare; unfavorably alter ecological balances of importance to human life; affect other species of importance to man; or degrade the utility of the environment for aesthetic, cultural, and/or historical purposes.

B. The control of environmental pollution and damage requires consideration of air, water, and land, and includes management of visual esthetics, noise, solid waste, radiant energy and radioactive materials, as well as other pollutants.

1.04 QUALITY ASSURANCE

A. Comply with this specification and the projects Storm Water Pollution Prevention Plan.

B. Inspection Logs will need to be submitted with Applications for Payment.

1.05 SUBMITTALS

A. Qualifications of Inspector (if SWPPP is issued)

2.01 STORM WATER POLLUTION INSPECTOR

A. Contractor is to provide a state qualified and licensed (if applicable) inspector to maintain and update the Storm Water Pollution Prevention Plan.

10/23/2024 02372 Environmental Protection – Page 2 of 5

PART 3 – EXECUTION

3.01 PROTECTION OF ENVIRONMENTAL RESOURCES

A. Protect the environmental resources within the project boundaries and those affected outside the limits of permanent Work during the entire period of this Contract. Confine activities to areas defined by the Drawings and Specifications.

B. Protection of Land Resources:

1. Prior to the beginning of any construction, identify all land resources to be preserved within the Work area.

2. Do not remove, cut, deface, injure, or destroy land resources including trees, shrubs, vines, grasses, topsoil, and landforms without special permission from the OWNER.

3. Do not fasten ropes, cables, or guy wires to any trees for anchorage unless specifically authorized. Where such special emergency use is permitted, provide effective protection for land and vegetation resources at all times.

C. Location of Field Offices, Storage, and Other Contractor Facilities:

1. Place field offices, staging areas, stockpile storage, and temporary buildings in areas designated by the OWNER.

2. Temporary movement or relocation of facilities shall be made only on approval by the OWNER.

D. Disposal of Waste:

1. Dispose of solid wastes (excluding clearing debris) in containers which are emptied on a regular schedule. All handling and disposal shall be conducted to prevent contamination.

2. Transport all solid waste off property and dispose of it in compliance with applicable Federal, State, and local requirements for solid waste disposal.

3. Store chemical waste in corrosion resistant containers, removed from the Work area and disposed of in accordance with applicable Federal, State, and local regulations.

4. Discarded materials other than those which can be included in the solid waste category shall be handled as directed by the OWNER.

3.02 PROTECTION OF WATER RESOURCES

A. Keep construction activities under surveillance, management, and control to avoid pollution of surface and ground waters. Special management techniques as set out herein shall be implemented to control water pollution.

10/23/2024 02372 Environmental Protection – Page 3 of 5

B. Washing and Curing Water:

1. Wastewaters directly derived from construction activities shall not be allowed to enter water areas.

2. These wastewaters shall be collected and placed in retention ponds where suspended materials can be settled out or the water evaporates so that pollutants are separated from the water.

C. Monitor all water areas affected by construction activities.

3.03 PROTECTION OF FISH AND WILDLIFE RESOURCES

A. Keep construction activities under surveillance, management, and control to minimize interference with, disturbance to, and damage of fish and wildlife.

B. Clean all equipment before entering the Park to limit invasive species

3.04 PROTECTION OF AIR RESOURCES

A. Keep construction activities under surveillance, management, and control to minimize pollution of air resources.

B. All activities, equipment, processes and Work operated or performed in accomplishing the specified construction shall be in strict accordance with the applicable air pollution standards of the State and all Federal emission and performance laws and standards.

3.05 PROTECTION OF SOUND INTRUSIONS

A. Keep construction activities under surveillance, and control to minimize damage to the environment by noise.

3.06 ADJUSTING AND CLEANING

A. Clean up any area(s) used for construction.

B. Restore all landscape features damaged or destroyed during construction operations outside the limits of the approved work areas. Such restoration shall be in accordance with the plan submitted to the OWNER for approval.

3.07 TRAINING OF CONTRACTOR PERSONNEL IN POLLUTION CONTROL

A. Train personnel in all phases of environmental protection.

B. Include methods of detecting and avoiding pollution, familiarization with pollution standards, both statutory and contractual, and installation and care of facilities to ensure adequate and continuous environmental pollution control.

10/23/2024 02372 Environmental Protection – Page 4 of 5

C. Train and inform quality control and supervisory personnel in the proper use of monitoring devices and abatement equipment, and Federal, State, and local laws, regulations, and permits, as listed in the Environmental Protection Plan submitted by the CONTRACTOR.

3.08 MAINTAINING STORM WATER POLLUTION PREVENTION PLAN

A. The Storm Water Pollution Prevention Plan is considered a “living document” and as such, will not show all the…