4_-_ARS_Volume_4_Supplemental_RD.pdf

Solicitation Number – P16PS00832

VAFO Remediation

Remediation for the Asbestos Release Site Remedial Action at Valley Forge National Historical Park, Upper Merion Township, Montgomery County, PA

Attachment 4:

Valley Forge ARS Volume 4

Supplemental RD March 2016

SUPPLEMENTAL REMEDIAL DESIGN

REPORT

VOLUME 4

CONSTRUCTION SPECIFICATIONS

VALLEY FORGE NATIONAL HISTORICAL PARK

ASBESTOS RELEASE SITE

VALLEY FORGE, PENNSYLVANIA

March 2016

Prepared by:

SPECIFICATIONS

TABLE OF CONTENTS

DIVISION 1

GENERAL REQUIREMENTS

01300 - Submittals and Substitutions 01500 - Temporary Facilities 01560 - Control of Work 01700 - Environmental Protection

DIVISION 2

SITE WORK

02110 - Clearing and Grubbing 02200 - Exploratory Excavation 02221 - Contaminated Soil Excavation and Handling 02223 - Contaminated Soil Transport and Off-Site Disposal 02262 - Coarse Aggregate and Rip-Rap Stone 02500 - Imported Soils 02525 - Backfill and Compaction 02805 - Erosion Control 02821 - Establishment of Growth 02832 - Reforestation 02995 - Decontamination

DIVISION 13

SPECIAL CONSTRUCTION

13550 - Warning Layer 13551 - Geotextile 13580 - Deer Fence

K:\3-0700-8\Remedial Design\RD Report 2015\Volume 4\021315 RD Report Vol 4 revised final.doc

Division 1 General Requirements

Section No. Pages

01300 - Submittals and Substitutions 4 01500 - Temporary Facilities 2 01560 - Control of Work 4 01700 - Environmental Protection 5

SECTION 01300

SUBMITTALS AND SUBSTITUTIONS

PART 1.00 GENERAL

1.01 DESCRIPTION

A. Work included:

To ensure that specified products and materials are furnished and installed in accordance with design intent, procedures are established herein for advance submittal of product or material information to be reviewed and approved or rejected by the National Park Service

(NPS).

Wherever possible, minimum acceptable quality of workmanship and materials have been defined either by manufacturer's name and catalog number or by reference to recognized industry standards.

B. Related work described elsewhere:

1. Individual submittals required are identified in pertinent sections of these

Specifications.

1.02 PRODUCT HANDLING

All submittals of Shop Drawings, samples, requests for substitutions, and other items shall be in strict accordance with the provisions of this Section.

PART 2.00 PRODUCTS

2.01 SHOP DRAWINGS

A. Scale Required:

Unless otherwise specifically directed by the Engineer or NPS, make all Shop Drawings accurately to a scale sufficiently large enough to show all pertinent features of the item and its method of connection to the work and submit no fewer than four (4) copies to the Engineer for review.

2.02 MANUFACTURER'S CERTIFICATIONS

A. For pipe, cement, steel reinforcement, paint and similar materials which are normally tested in the shop by the manufacturer, furnish the Engineer certified records of physical, chemical and other pertinent tests and/or certified statements from the manufacturer that the materials have been manufactured and tested in conformity with the specifications.

Where such a small quantity of material is required as to make physical tests or chemical analyses impractical, a certificate from the manufacturer stating the results of such tests or analyses of similar materials which were concurrently produced may, at the discretion of the NPS, be considered as the basis for acceptance of such materials.

Submittals and Substitutions Section 01300

B. Each manufacturer's certificate shall be endorsed or accompanied by the Contractor's certificate that the material certified by the manufacturer will be the material incorporated in the work.

2.03 SAMPLES

A. Accuracy of sample:

Unless otherwise specifically directed by the NPS, all samples shall be of the precise article proposed to be furnished.

2.04 SUBSTITUTIONS

A. NPS's approval required:

1. The Contract is based on the materials, equipment and methods described in the Contract Documents.

2. The NPS will consider proposals for substitution of materials, equipment, and methods only when such proposals are accompanied by full and complete technical data and all other information required by the NPS to evaluate the proposed substitution.

3. Do not substitute materials, equipment, or methods unless such substitution has been specifically approved for this work by the NPS.

B. "Or Equal":

1. Where the phrase "or equal" occurs in the Contract Documents, do not assume that material, equipment or methods will be approved as equal by the Engineer unless the item has been specifically approved for this work by the NPS.

2. The decision by the NPS will be final.

C. Availability of specified items:

1. Verify prior to bidding that all specified items be available in time for installations during orderly and timely progress of the work.

2. In the event specified item or items will not be so available, so notify the NPS prior to receipt of bids.

PART 3.00 EXECUTION

3.01 IDENTIFICATION OF SUBMITTALS

A. Completely identify each submittal and resubmittal by showing at least the following information:

1. Name and address of submitter, plus name and telephone number of the individual who may be contacted for further information.

2. Name of project as it appears on these Specifications.

3. Drawing number and Specifications Section number to which the submittal applies.

4. Whether this is an original submittal or resubmittal.

3.02 COORDINATION OF SUBMITTALS

A. General:

Prior to submittal for NPS's review, use all means necessary to fully coordinate all material, including the following procedures:

1. Determine and verify all field dimensions and conditions, materials, catalog numbers, and similar data.

2. Coordinate as required with all trades and with all public agencies involved.

3. Secure all necessary approvals from public agencies and others, and signify by stamp, or other means, that they have been secured.

4. Clearly indicate all deviations from the Contract Documents.

B. Grouping of Submittals:

Unless otherwise specifically permitted by the NPS make all submittals in groups containing all associated items; the NPS may reject partial submittals as not complying with the provisions of the Contract Documents.

3.03 TIMING OF SUBMITTALS

A. General:

Make all submittals far enough in advance of scheduled dates of installation to provide all required time for reviews, for securing necessary approvals, for possible revision and resubmittal, and for placing orders and securing delivery.

B. Delays:

Costs of delays occasioned by tardiness of submittals will not be borne by the NPS.

3.0.4 SUBMITTAL SCHEDULE

A. A schedule and descriptions of required Contractor Submittals shall be prepared by the Contractor and provided to the Engineer for review and approval prior to the first submittal. This schedule shall be updated by the Contractor as needed during the course of the project.

END OF SECTION

SECTION 01500

TEMPORARY FACILITIES

A. Work included:

The Contractor shall provide temporary facilities required which include but are not necessarily limited to the following:

1. Utilities required for Contractor and the Engineer’s use such as potable water, electricity and telephone.

2. Facilities such as office trailers (for the Contractor and the Engineer) and access routes.

3. Sanitary facilities.

2.01 UTILITIES

Temporary water supply, electricity and/or telephone services shall be provided by the Contractor.

Any such temporary services shall be removed by the Contractor upon completion of, and prior to acceptance of the work.

2.02 TEMPORARY FIELD OFFICE FACILITY

In addition to field offices needed for the Contractor, a field office space shall be provided by the Contractor for the use of the Engineer and representatives of the NPS. The Contractor shall equip the office space with electricity, heat, air conditioning, and desk/table space for at least two occupants, fax, and internet access.

2.03 ACCESS ROUTES

Vehicular access shall be maintained on public roads at all times for regular traffic as well as for emergency vehicles, except closing of portions of County Line Road on a short term basis may be required during the project and will only be done after coordinating and providing notice to the Park. Closing must still allow emergency vehicle traffic, including the Fire and Police Departments.

2.04 SANITARY FACILITIES

Furnish and install all required temporary sanitary toilets for use of all workers; comply with all minimum requirements of the Health Department or other public agency having jurisdiction;

maintain in a sanitary condition at all times.

Section 01500

3.01 MAINTENANCE

Maintain all temporary facilities as long as they are needed for the safe and proper completion of the work.

SECTION 01560

CONTROL OF WORK

1.01 EQUIPMENT

The Contractor shall furnish manpower and equipment which shall be efficient, appropriate and capable of securing a satisfactory quality of work and a rate of progress that will ensure the completion of the work within the time stipulated in the Contract.

1.02 UTILITY LOCATIONS

The locations of existing utilities on the Drawings should be considered approximate and may be incomplete. Contractor shall confirm the presence and locations of existing utilities through all available means including dig-safe; review of Park drawings; and exploratory excavations.

1.03 TEST PITS

Test pits for the purpose of locating underground pipeline or structures in advance of the construction, if needed, shall be excavated and backfilled by the Contractor. Test pits shall be backfilled immediately after their purpose has been satisfied and the surface restored and maintained.

1.04 OPEN EXCAVATIONS

A. All open excavations shall be adequately safeguarded by providing temporary barricades, caution signs, lights and other means to prevent accidents to persons, and damage to property. The Contractor shall provide suitable and safe bridges and other crossings for accommodating travel by pedestrians and workmen where necessary. The length of open trench will be controlled by the particular surrounding conditions. If the excavation becomes a hazard as defined by trenching regulations (29 CFR 1926 Subpart P), or if it excessively restricts traffic at any point, special construction procedures may be required such as limiting the length of open trench, construction of shoring, prohibiting stacking excavated material in the street, and/or requiring that the trench not remain open overnight.

B. The Contractor shall take precautions to prevent injury to the public due to open trenches.

All trenches, excavated material, equipment, or other obstacles which could be dangerous to the public shall be well lighted at night. The Contractor is responsible for compliance with all trench safety standards prescribed by the Occupational Safety and Health Administration (OSHA) (29 CFR 1926 Subpart P).

1.05 HEALTH AND SAFETY

The Contractor shall prepare a site-specific Health and Safety Plan (HASP) that covers all aspects of the Contractors’ on-site activities and is compliant with the requirements as set forth in 29CFR1910.120 and 29CFR1926. The Contractor will be required to submit documentation that all site workers meet the 40 hour training requirements as set forth in 29CFR1910.120 “Hazardous waste operations and emergency response”, as well as, documentation that all site workers are

Control of Work Section 01560 cleared for respirator use and have current “fit test” certification. The Contractor is also responsible to assure remedial activities are conducted in accordance with the Federal and State regulations for general construction as they may pertain.

1.06 CARE AND PROTECTION OF PROPERTY

A. The Contractor shall be responsible for the preservation of all public and private property, and shall use every precaution necessary to prevent damage thereto. If any direct or indirect damage is done to public or private property within or beyond the limits of work by or on account of any act, omission, neglect, or misconduct in the execution of the work on the part of the Contractor, the Contractor shall restore the property, at his expense, to a condition similar or equal to that existing before the damage was done and at least meeting the specifications contained herein.

B. All sidewalks, driveways, and curbing which are disturbed by the Contractor's operations shall be restored to their original condition by the use of similar or comparable materials and constructed according to the specifications contained therein.

C. Along the location of this work all fences, walks, bushes, trees, shrubbery, and other physical features shall be protected and restored in a thorough and workmanlike manner.

Fences and other features removed by the Contractor shall be replaced in their original location. All grass areas beyond the limits of construction which have been damaged by the Contractor shall be regraded and seeded with a seed mix approved by the NPS.

1.07 PROTECTION OF EXISTING STRUCTURES AND UTILITIES

A. The Contractor shall assume full responsibility for the protection of all buildings, structures, and utilities, public or private, including poles, signs, services to buildings, treatment plant piping, water pipes, hydrants, sewers, drains, and electric and telephone cables. The Contractor shall carefully support and protect all such structures and utilities from injury of any kind.

1.08 MAINTENANCE OF FLOW

The Contractor shall provide for the flow of sewers, drains, and water courses interrupted during the progress of the work.

1.09 PROTECTION OF STORM DRAINS, SEWERS AND WATER LINES

Where storm drains, water and/or sewer lines exist in the immediate area of construction, care must be taken not to disturb the pipes. In addition, any hydrants, valve boxes, manholes or other appurtenances at the ground surface must be protected from damage during construction.

1.10 DUST AND NOISE CONTROL

The Contractor shall minimize noise to the greatest extent practicable. The Contactor must comply with the dust control provisions, further defined in Section 01700, Part 3.03. Air monitoring will be conducted to verify the adequacy of the dust control measures.

1.11 CLEANUP

During the course of the work, the Contractor shall keep the work site in as clean and neat a condition as is possible, and shall dispose of all solid waste resulting from the construction work.

At the conclusion of the work for each excavation area, the Contractor shall remove and haul away any broken pavement, lumber, equipment, temporary structures, and any other refuse remaining from the construction operations, and shall leave the entire site of the work in a neat and orderly condition.

1.12 TRAFFIC SAFETY

A. Construction shall be scheduled and excavated material shall be placed so that vehicular and pedestrian traffic can be maintained at all times, unless previous arrangements are agreed to by the Park.

B. Traffic shall be protected by barricades and advance warning signs conforming to applicable State Highway Standards.

1.13 UNIFORMED TRAFFIC OFFICER

The Contractor may need to employ a uniformed traffic officer on a state or local highway or street when public safety or convenience requires the services of a uniformed officer. These services may be required but are not limited to situations where normal two-way traffic is reduced to one lane, or where interference with normal traffic flow pattern can be expected, such as equipment entering, leaving or crossing roads.

1.14 AS-BUILT DRAWINGS

The Contractor shall complete all surveying requirements including the recording of all lines and grades of installed structures and all associated appurtenances as well as the general discovery and location of any item not previously known.

None in this Section.

3.01 WORK HOURS

All work will be conducted between the hours of 6:00 A.M. and 6:00 P.M. on weekdays, and between 8:30 A.M. and 6:00 P.M. on weekends.

3.02 COORDINATION

The Contractor will need to coordinate its remedial activities with the Park to minimize disruption to Park operations and impact on visitors. When remedial activities require the closing of Park paths, trails, roads or other areas currently open to the public the Contractor shall provide the Park with a minimum notice of 7 days.

SECTION 01700

ENVIRONMENTAL PROTECTION

A. The Contractor shall follow all disposal, noise, water, and air pollution best management practices to assure environmental protection, and take appropriate actions during the Project to control and avoid adverse environmental impacts due to Work activities.

B. The Contractor shall be responsible for developing, administering, implementing and monitoring Environmental Protection activities and policies. Environmental Protection shall address, but not be limited to, the following items, as described more fully herein:

1. Land and water resource protection.

2. Identification, handling, management, transportation, and disposal of all material waste, including but not limited to hazardous waste or material generated, released or encountered in-situ by the Contractor.

3. Spill prevention and emergency response procedures including, but not limited to, response actions and prevention measures for Site accidents, emergencies, and chemical spills or releases. Special emphasis shall be given to avoid fuel spills when refueling equipment.

4. Environmental monitoring (ambient air and worker).

None in this section.

3.01 CARE AND PROTECTION OF WATER RESOURCES

A. The Contractor shall be responsible for the preservation of all public and private property and the protection of water resources. The Contractor shall not allow any construction site debris to enter any stream or discharge any water wastes, or other material from the construction site into any stream.

B. During the Work, the Contractor shall prevent damage to land resources outside the areas to be excavated. The Contractor shall not deface, destroy, remove, or cut trees or shrubs other than only that needed to perform the Work.

D. During all times of the year, all water resources shall be protected from any construction debris including, but not limited to, asphalt, concrete, blast media, the leaching of chemical pollutants, and Site erosion. Storage of chemicals, fuels, oil, greases, bituminous materials, solids, waste washing, and concrete shall be handled to prevent leaching or surface runoff into public waters, in the event of a spill.

Environmental Protection Section 01700

E. The Contractor shall maintain all excavations, embankments, stockpiles, laydown areas, haul roads, access roads, borrow areas, and all other Work areas inside or outside the Site to control the generation of dust. Dust control methods specified in Paragraph 3.03 and temporary methods of stabilization consisting of sprinkling, chemical treatment, light bituminous treatment, or similar methods are acceptable for dust control.

F. All dewatering operations and any in-stream work shall conform to the requirements set forth in the Commonwealth’s Erosion and Sediment Pollution Control Program Manual dated March 2012.

3.02 CONTROL OF SOIL EROSION AND SILTATION

The Contractor is to comply with all requirements and procedures outlined in the Commonwealth’s Erosion and Sediment Pollution Control Program Manual, March 2012 and those specified in the Contract Documents.

It shall be the Contractor's responsibility to take all necessary precautions to prevent and control erosion and to construct sediment basins, diversion ditches or such other construction to satisfactorily accommodate runoff from any area subject to erosion during the construction of this project. Such precautionary measures include, but are not necessarily limited to, construction of sediment basins, diversion ditches, benches and berms, installation of silt fence and/or straw bales or laying fiber matting on slopes until vegetation is established.

3.03 DUST CONTROL

A. The Contractor shall control the generation of dust to the greatest extent practicable. If dust is created, the Contractor will need to provide control measures. These measures will consist of treating traveled, excavation, stockpiling, backfilling and soil load out areas to control dust.

B. Materials for dust suppression include water and calcium chloride.

C. DUST CONTROL WITH WATER. Water shall be applied to designated traveled areas.

The number of applications and the amount of water used shall be based upon field and weather conditions.

D. DUST CONTROL WITH CALCIUM CHLORIDE. Dust Control with calcium chloride shall be applied in such a manner and by such devices that uniform distribution is obtained over the entire area being treated. Calcium chloride shall be applied at a rate not to exceed 270 g/m2 (½ pound per square yard) for dust control. In general, calcium chloride shall be used on roadways under construction. It shall not be used on surfaces on which bituminous material will be applied.

3.04 CLEANUP

Cleanup shall be in accordance with Section 01560.

3.05 EQUIPMENT

A. The Contractor’s equipment shall be clean and well maintained and free of fuel, hydraulic and gear oil leaks. The equipment must be thoroughly pressure washed before delivery to the Site to assure no weed seed is present.

B. All equipment brought on the Site is subject to the Engineer’s approval. Any equipment declared by the Engineer as not suitable shall be immediately removed from the Site and replaced with acceptable equipment, at no additional cost to the NPS.

3.06 MATERIAL AND WASTE MANAGEMENT

A. The Contractor shall provide a Material Safety Data Sheet (MSDS) for each material furnished under or otherwise associated with the Work.

B. Products shall be brought on the Site and stored in their original containers with original labels.

C. Products shall be stored in a manner consistent with their labeling and in a manner which shall provide protection from accidental release to the environment.

D. The Contractor shall be responsible for management and daily inspection of chemical products, equipment and waste generation (and associated accumulation and storage areas). All wastes shall be cleaned up daily and disposed of at a lawful disposal facility on a regular basis. All waste labeling, packaging and transport shall be completed by the Contractor in accordance with all applicable federal, state and local regulations. There shall be no onsite disposal of wastes. All wastes shall be disposed of at disposal facilities that have been properly licensed by the U.S. Environmental Protection Agency and/or the Commonwealth of Pennsylvania. The Contractor shall provide evidence of disposal at the facility using either hazardous waste manifest, bill of lading, and/or a certificate of disposal, as appropriate.

3.07 REFUELING POLICY

This policy shall be posted at all refueling points:

A. Refueling or greasing shall not take place over surface water, within ten feet of surface water, or in locations where spilled materials could flow into surface water. If possible, refueling shall take place over impermeable surfaces such as asphalt or concrete, but in any event over areas that provide sufficient containment capacity.

B. Prior to re-fueling or greasing, petroleum sorbent pads shall be placed to catch any incidental spills.

C. All refueling operation equipment shall be in the immediate control (e.g. the nozzle or shut off switch in hand) of the person performing the refueling.

D. In the event of a release not collected by the sorbent pads, the Engineer will be immediately informed, and affected soils shall be immediately dug up and placed in a labeled DOT approved drum. A photoionization detector will be used to screen soils left in place to insure all contaminated materials are removed. A record of the release, the response, and the personnel involved and the temporary disposition of the materials will be prepared by the Engineer as part of the daily report. Costs associated with spill response and remediation will be borne by the Contractor.

3.08 SPILLS

A. In the event of a spill or release of a hazardous substance, pollutant, contaminant, or oil, Contractor shall notify the Engineer and NPS immediately. Contractor shall follow the pre-established procedures that will be described in the RAWP for immediate reporting and containment. Immediate containment actions shall be taken to minimize the effect of any spill or leak. Cleanup shall be in accordance with applicable federal, state, and local regulations. Additional sampling and testing shall be performed to verify spills have been cleaned up per the direction of the Engineer. Spill cleanup and testing shall be at no additional cost to the NPS.

Following completion of clean-up activities the Contractor shall submit a report to NPS within 5 days that includes at a minimum:

a. Time, date, location and cause of release.

b. Amount of materials released, actions taken and amount recovered.

c. Any property damage or ecological impact.

d. Person(s) involved including and Federal and State Agencies on site or contacted.

e. Any analytical data collected to verify clean-up.

f. Additional actions, if needed, and an implementation schedule.

3.09 TRAINING

1) All Contractor employees who handle, transport or in any way manage hazardous wastes or substances, or participate in the cleanup of hazardous substances, are required to be trained in the proper management of hazardous wastes and substances. The Contractor training in management of hazardous waste and substances shall follow the requirements of the federal and state hazardous waste regulations in addition to applicable OSHA requirements. Training shall cover hazardous waste management, hazard communication standard, right-to-know laws and OSHA hazardous response training requirements.

B. As specified in the various regulations issued by the U.S. Environmental Protection

Agency (EPA) and OSHA, certain Contractor employees require different levels of training depending on the employee’s exposure potential and frequency of exposure to hazardous materials. The following Contractor employees shall be required to attend appropriate hazardous waste training.

Under federal and state hazardous waste management rules, all employees who have hazardous waste management responsibilities, including the implementation of emergency procedures, must be provided with supervisor level training under 29 CFR 1910.120. In addition, employees designated as hazardous waste cleanup personnel must first receive training in accordance with 29 CFR 1910.120.

New Contractor employees or reassigned employees shall be given hazardous waste training in accordance with 29 CFR 1910.120 within six (6) months of employment or reassignment. No unsupervised tasks involving management of hazardous waste shall be undertaken by the new or reassigned employee until the employee has undergone training.

It is the responsibility of the Contractor to ensure that annual hazardous waste training for all Contractor employees who handle or manage hazardous waste is conducted.

C. Records of personnel training shall be kept by the Contractor and provided to the NPS

Project Manager. The Contractor shall also be responsible for maintenance of the records of training and ensuring that all Contractor employees are trained.

3.10 AIR MONITORING

3.10.1 Air Monitoring Program

A. Contractor Employee Monitoring: The Contractor shall prepare a Site-specific air monitoring plan for personal worker exposure monitoring that is generally described in Volume 2, Section 3.5 of the Remedial Design Report. This worker exposure air monitoring plan shall be part of the Contractor’s site-specific Health and Safety Plan.

B. Ambient Air Monitoring: The Contractor will be responsible for conducting ambient air monitoring as outlined in Volume 2, Section 3.5. Details for the ambient air monitoring program shall be provided by the Contractor in a SAP and QAPP that will be part of the Contractor’s RAWP to be submitted to NPS for review and approval prior to initiating any RA tasks.

Division 2 Site Work

Section No. Pages

02110 - Clearing and Grubbing 3 02200 - Exploratory Excavation 2 02221 - Contaminated Soil Excavation and Handling 9 02223 - Contaminated Soil Transport and Off-Site Disposal 6 02262 - Coarse Aggregate and Rip-Rap Stone 3 02500 - Imported Soils 3 02525 - Backfill and Compaction 4 02805 - Erosion Control 4 02821 - Establishment of Growth 4 02832 - Reforestation 4 02995 - Decontamination 3

SECTION 02110

CLEARING AND GRUBBING

A. The work of this section consists of the clearing of vegetation; removal of stumps, roots, and debris; disposal of these unutilized materials; and related incidentals required to prepare the site for the work.

Contaminated Soil Excavation and Handling - Section 02221

Contaminated Soil Transport and Off-Site Disposal – Section 02223 Decontamination – Section 02995

1.02 JOB CONDITIONS

A. Work Limits:

The limits of contaminated soil excavation shall be located and the area shall be cleared and grubbed. The limits of clearing shall be kept to only that necessary to complete the Work.

B. Landscape Preservation:

Protect from injury all vegetation to remain. To minimize damage to adjacent vegetation, fell trees towards the center of the area to be cleared. Obtain the Park’s approval before cutting any trees larger than 6-inches in diameter. Do not operate any equipment or place materials over the root zone or below the drip line of trees to be protected.

1.03 DEFINITIONS

A. Clearing:

Clearing shall consist of the felling, trimming, and cutting of trees and brush into sections and the proper disposal or utilization of the trees and other vegetation designated for removal, including downed timber, snags, brush, and rubbish occurring within the delineated excavation areas.

B. Grubbing:

Grubbing shall consist of the removal and disposal of stumps, roots larger than 3 inches in diameter, and matted roots from the delineated excavation areas. Grubbing shall be performed concurrent with the excavation of contaminated soil.

Clearing and Grubbing Section 02110

1.04 SUBMITTALS

A. Submit manufacturer’s information and the MSDS for tree wound paint.

PART 2.00 MATERIALS

2.01 TREE WOUND PAINT

A. Bituminous based paint of standard manufacture specially formulated for tree wounds.

PART 3.00 EXECUTION

3.01 PREPARATION

A. The excavation limits will be determined and the limits of clearing will be staked and/or flagged by the Contractor. The clearing limits shall be reviewed and approved by the Engineer prior to cutting any vegetation.

B. Trees and vegetation to be left standing shall be protected from damage incident to clearing, grubbing, excavation, stockpiling, backfilling and surface restoration by the erection of safety fence, warning tape, barriers or by other means as may be required by the circumstances.

C. Protect existing utility lines that are indicated to remain from damage. Notify the Engineer immediately of damage to, or an encounter with, an unknown existing utility line. The Contractor shall be responsible for the repairs of damage to existing utility lines that are indicated or made known to the Contractor prior to start of clearing and grubbing operations.

3.02 CLEARING

A. Remove trees and brush within the delineated limits of clearing. Trim, as directed, low hanging and unsound or unsightly branches on trees and shrubs designated to remain, but conflict with the work (e.g., hanging into access routes). Make cuts flush with trunk or branch. Cuts more than 1-1/2 inches in diameter shall be painted with a tree-wound paint approved by EPA.

B. The Contractor shall take measures to limit the contact of cut vegetation with contaminated soil and surface soil disturbance during clearing operations.

C. Chip all limbs, small trees and brush and stockpile as directed by the Engineer.

D. Salvage logs 12” diameter and greater and stockpile as directed by the Engineer.

E. In areas which are to be disturbed but not excavated, and which essentially remain at the same grade, prune woody shrubs to within 2 inches of the ground surface.

Clearing and Grubbing Section 02110

3.03 GRUBBING

A. As encountered during contaminated soil excavation, remove stumps, roots, and debris.

B. Minimize to the degree possible the amount of soil excavated during large stump removal to that of the root ball. Soil excavated during root removal shall be handled in accordance with Section 02223.

3.04 SALVAGE AND DISPOSAL

A. Trees and limbs 12 inches diameter and larger: trim, cut into 8-12 foot lengths and stockpile as directed by NPS. In wetland areas, place trimmed and cut trees as directed by the Engineer and NPS for reuse in the wetland restoration (see the Planting and Restoration Plan – Section 4.0 of Volume 2). Chip remaining debris to be used as mulch or otherwise spread as directed by the Engineer and NPS.

B. Stumps and roots removed during the contaminated soil excavation shall be stockpiled near the excavation and disposed of with the excavated soil.

SECTION 02200

EXPLORATORY EXCAVATION

A. Exploratory excavation shall be performed for the purpose of determining the location of underground structures and utilities using tight control machinery supplemented by hand labor.

B. The Contractor shall provide all labor, equipment and materials necessary to perform exploratory excavation as directed by the Engineer.

C. Damage to existing structures and utilities shall be avoided during exploratory excavation.

Any such structure or utility damaged by the Contractor shall be replaced or repaired at no cost to the NPS.

D. Related work described elsewhere:

Contaminated Soil Transportation and Offsite Disposal – Section 02223

Decontamination - Section 02995.

None in this Section.

3.01 SCHEDULING

A. The Contractor shall consult frequently with the Engineer as to the location of the exploratory excavations so that this work may be scheduled sufficiently in advance of installation of other items of the work.

B. All available information on the location of existing underground structures and utilities shall be obtained prior to starting this type of excavation. Utility locating services (Pennsylvania 8-1-1) shall be contacted between 3 and 10 days before scheduled exploratory excavation work.

C. The owners of structures and/or utilities to be affected shall be notified in sufficient time to allow their representatives to observe the exploratory excavations.

D. Exploratory excavations shall be scheduled to be the first work performed in an area of excavation, if required to locate utilities or other underground infrastructure near the planned excavation. Exploratory excavations shall be scheduled to facilitate an immediate transition to normal excavation activities once the exploratory excavations are complete.

Exploratory Excavation Section 02200

3.02 EXCAVATION

A. All excavations shall be conducted with extreme care so as not to damage any existing structure or utility. If damage occurs, the Engineer and the respective utility owner shall be notified immediately. Any repairs shall be made promptly.

B. The Contractor shall use hand or vacuum excavation techniques while conducting excavations within one foot of the buried utility.

C. The Engineer shall be notified when the location of underground structures or utilities has been determined.

D. Excavated materials shall be handled and disposed of in accordance with Section 02221, Contaminated Soil Excavation and Handling and Section 02223, Contaminated Soil Transport and Off-Site Disposal.

E. When exploratory excavations are performed within the design boundary of a remedial excavation, the Contractor shall decontaminate all equipment before it leaves the area in accordance with Section 02995, Decontamination.

3.03 BACKFILL AND RESTORATION

A. Exploratory excavations shall be backfilled to the existing ground surface unless otherwise directed by the Engineer.

B. Exploratory excavations conducted within remediation areas shall be restored using the same methods and materials as those employed for the remedial excavation.

SECTION 02221

CONTAMINATED SOIL EXCAVATION AND HANDLING

A. The work of this section consists of excavation and handling of excavated soils from the excavation areas including loading and stockpiling excavated material. The work is accessed from the NPS and Commonwealth roadways and/or by temporary access routes created by the Contractor. Contaminated soils will be loaded directly into off-road transport trucks and/or containers whenever possible. When necessary, contaminated soils will be temporarily stockpiled and covered until loaded for off-site disposal.

B. All material, equipment, supplies and accessories required are to be provided by the

Contractor. All excavation shall be open cut. Work items include: removal of pavements and structures; protection of trees and structures to remain; excavation; controlled stockpiling and loading of excavated materials; excavation protection; surface water management and bypassing; dewatering; and erosion and sediment controls.

The Contractor shall submit a Contaminated Soil Excavation and Handing Plan as part of the Remedial Action Work Plan that addresses how the soil will be removed from each individual excavation, identifies temporary stockpile and decontamination locations, and provides the overall sequencing of the soil excavations. This plan shall also include details on the proposed methods of surface water management and bypassing.

Clearing and Grubbing – Section 02110 Exploratory Excavation – Section 02200 Contaminated Soil Transport and Off-site Disposal – Section 02223 Imported Soils – Section 02500 Backfill and Compaction – Section 02525 Erosion Control – Section 02805

A. Dust Control:

Mist as needed to control dust on and near the work and on and near all excavation, stockpile and loading locations. Water and/or calcium chloride shall be applied to temporary haul roads to prevent dust from becoming a nuisance to the public or workers.

See Section 01700, Environmental Protection.

B. Unauthorized Over-Excavation:

If unauthorized over-excavation occurs, the excavated soil will be assumed contaminated.

The Contractor shall be responsible for the repair of the area by backfilling with fill material approved by Engineer and compacting to a minimum of 90 percent maximum

Contaminated Soil Excavation and Handling Section 02221 density, as determined by ASTM D-1557-78. The Contractor will be responsible for the transport and proper disposal of the unauthorized excavated soil at no additional cost to the NPS.

C. Control of Contaminated Soil:

Provide all means necessary to prevent the spread of contaminated soil to uncontaminated areas, including the use of designated loading areas, and polyethylene sheeting down the sides of trucks, trailers or containers. Inspection of wheels/tires and decontamination, as needed, will be performed to prevent tracking of contaminated soil.

The Contractor shall decontaminate excavation equipment that comes in contact with contaminated soil before moving to a clean area or to another excavation (See Section 02995, Decontamination). The Contractor shall sequence the excavations to prevent stormwater runoff from an area of contaminated soil to an area previously excavated.

D. Protection of Existing Conditions:

All means necessary shall be used to protect all materials, utilities, pavements and structures during the excavations, soil handling, or use of any heavy equipment on the site.

Particular care shall be exercised to protect tree root systems and tree trunks that are adjacent to excavation areas. In the event of damage, all repairs and replacements necessary shall be made immediately.

E. Environmental Protection:

Install and maintain all erosion and sediment control systems as shown on the Drawings and described in Specification Section 01700, Environmental Protection. Divert and/or bypass surface waters and stormwater runoff as necessary to prevent siltation during remedial actions and allow contaminated soil excavation.

F. Work Restrictions:

No excavation or loading will be conducted when raining. Do not operate equipment on native soils until conditions have sufficiently dried out to prevent rutting. No excavation will be performed in water. Surface water shall be excluded from the excavation to the degree possible and excavation shall not resume until any surface water has infiltrated or the excavation has been dewatered.

A. Excavation Classification:

For payment purposes excavation shall include materials of every description, and of whatever substances encountered, to the depths and of the areas identified on the Drawings. No classification will be made of the materials excavated as to depth, nature, composition, hardness, nor degree of water content.

B. Excavation Limits:

The horizontal and vertical extent of excavation as shown on the Drawings.

C. Approved Additional Excavation:

Excavation beyond the specified horizontal and/or vertical limit following verification testing and additional contaminated soil delineation.

D. Unauthorized Over-excavation:

Excavations completed by the Contractor beyond the design dimensions without prior approval from the Engineer.

E. Allowable Tolerances:

A tolerance of 0.33 foot below the specified depth of excavation is the maximum allowed unless approved by the Engineer. This allowed tolerance level shall not be a basis for an additional pay request. All excavations shall be no shallower than the specified depth.

1.05 SUBMITTALS

A. Contaminated Soil Excavation and Handling Plan:

The Contractor shall submit this document as part of an overall Remedial Action Work Plan (RAWP) within 60 calendar days after notice to proceed. No work at the Site, with the exception of Site inspections and surveys, shall be performed until the RAWP is approved. No adjustment for time or money will be made if resubmittals of the RAWP are required due to deficiencies in the plan. At a minimum, the Contaminated Soil Excavation and Handling Plan shall include:

a. Schedule of activities, including sequencing of the excavations.

b. Method, procedures and equipment to be used for excavating, stockpiling, and rehandling, of excavated material.

c. Shoring or side-wall slopes proposed.

d. Dewatering plan.

e. Surface water management and diversion plan.

f. Storage methods and locations for liquid and solid contaminated material.

g. Access and haul routes.

h. Decontamination procedures.

i. Spill contingency plan.

B. Water source for dust control, decontamination and compaction.

The Contractor shall identify the source of water and provide evidence that it is free of contamination. This may include analytical testing for surface water or the use of municipal potable water.

2.01 POLYETHYLENE SHEETING

Polyethylene sheeting for use under and covering temporary stockpiles or covering open excavations for dust control shall be a minimum 10 mil thick continuous sheet scrim-reinforced underliners/covers with a minimum weight of 40 pounds per 1,000 square feet.

2.02 WATER

Decontamination and dust control water shall be clean, and free from any harmful substances.

3.01 PREPARATION

A. Erosion Control:

Prior to excavation, the Contractor shall install all necessary erosion/sediment control features.

B. Surface Water Control:

Prior to excavation in and around the Unnamed Tributary, the Contractor shall install necessary surface water diversion/control features.

C The Contractor shall be responsible for identifying utilities and obtaining dig-safe clearance as follows:

Prior to excavation, the Contractor shall identify and locate any subsurface utility that exists in and/or adjacent to excavation areas. The Contractor shall perform exploratory excavations (See Section 02200) as necessary to locate subsurface utilities.

D. Establish Excavation Limits:

Stake out horizontal extent excavation control points for approval by the Engineer and establish vertical control necessary to achieve and verify the required depth.

E. Ground Surface Preparation:

Prior to excavating, all clearing and grubbing operations shall be completed as detailed in Section 02110. Clearing limits shall be flagged by the Contractor and approved by the Engineer prior to cutting any vegetation.

F. Perimeter Air Monitoring:

Prior to excavation, stockpiling or loading activities, confirm with Engineer or NPS that perimeter air (dust and ACM) monitoring equipment is functional and properly sited relative to the soil excavation, loading activities, and/or weather conditions (wind direction/speed) (see Section 3.5, Volume 2).

G. Waste Characterization: Prior to excavation, identify the off-site disposal facility and waste characterization requirements for excavated soils on an individual excavation basis.

3.02 EXCAVATION OF CONTAMINATED SOIL

A. Contaminated soil shall be excavated to the horizontal and vertical limits shown on the Drawings after their location has been staked in the field and approved by the Engineer.

Provide dewatering of encountered groundwater and containerize removed groundwater for characterization and disposal.

B. Install shoring and/or sheeting if necessary to protect adjacent structures from damage.

C. Do not interfere with bearing zone of foundations, defined as soil that extends downward 30 degrees from horizontal, starting at a point, 2 feet horizontally from the bottom edge of the footing.

D. Divert upgradient surface water runoff away from the excavation.

E. Keep the excavation open and dry until vertical and horizontal excavation limits are approved by the Engineer. The Engineer will determine if additional excavation is needed or the excavation can be backfilled. Where previously specified and/or as directed by the Engineer, install the warning layer in accordance with Section 13550.

F. Whenever practical, load contaminated soil directly from the excavations into containers or truck or trailer beds for off-site transport to the disposal facility. Where direct load is not possible due to access or other constraints, use loaders or off-site transport trucks to transfer contaminated soils to containers/beds for off-site disposal or to temporary stockpiles for subsequent load out.

G. When practical, excavate the contaminated soils from the periphery of the excavation boundaries such that only the bucket and boom contact the contaminated soils.

H. Hand excavation is required around tree roots inside the tree drip line, and for soils adjacent to existing utilities and structures.

I. Remove disturbed soil from active excavations by the end of the workday. Keep areas beyond the limit of excavation undisturbed.

3.03 UNAUTHORIZED OVER-EXCAVATING

A. Excavation beyond the horizontal limits and vertical tolerance (0.33 feet) is considered unauthorized unless directed by the Engineer. Should unauthorized excavation occur due to the Contractor’s actions, including errors, excavation methods, or for convenience, the unauthorized excavation shall be corrected by the Contractor at no additional cost to the NPS. Excavation to the vertical tolerance (0.33 feet) shall not be the basis for an additional pay request.

B. In areas of excavation where large stumps are present the maximum tolerance will be waived following inspection and approval by the Engineer. The excavation required to remove stumps shall be kept to the minimum reasonably possible.

C. If unauthorized over-excavation occurs, the Contractor shall be responsible for the repair of the area, which shall include backfilling and compaction with imported soils, and surface restoration. This work shall be performed in accordance with the Contract Documents at the Contractor’s expense.

3.04 LOADING OF CONTAMINATED SOIL

A. The transport vehicle operator shall remain inside the vehicle during loading.

B. When loading contaminated soil place poly sheeting under and down the side of trucks or containers to protect the outside of the container/bed and to control any spillage. Any spilled soil will be collected from the poly sheeting and added to the load. If the poly sheeting is significantly damaged and/or contaminated it shall be disposed of with the contaminated soil and not reused.

C. Limit free-fall when loading contaminated soil/debris to prevent damage to the bed liner.

D. Evenly load the transport vehicle bed or container to prevent shifting of the load during transport.

E. Control dust as necessary by misting.

F. Assure no free liquid exists in the materials to be loaded or stabilize the materials with methods and materials approved by the Engineer and acceptable to the disposal facility.

G. Do not load the transport vehicle bed or container beyond the tonnage that will result in the transport vehicle exceeding applicable weight restrictions.

H. Securely cover the load in a manner that will prevent fugitive dust or other release of materials during transport.

I. Inspect the transport vehicle and decontaminate as necessary for the Engineer’s approval prior to travel over non-contaminated soil and/or Park or public roadways.

3.05 CONTROL OF CONTAMINATED SOIL

A. Use poly sheeting overlain with plywood, swamp mats or other Engineer approved barrier systems to support excavation and transport equipment as needed to prevent track and wheel contact with contaminated soil. The barrier must prevent tracking of any contaminated soil into adjacent clean areas, and will allow equipment travel over areas within the excavation limits and simplify equipment decontamination.

B. When loading contaminated soil, place poly sheeting under and down the side of trucks or containers to protect the outside of the container/bed and to control any spillage. Any spilled soil will be collected from the poly sheeting and added to the load. If the poly sheeting is significantly damaged and/or contaminated, it shall be disposed of with the contaminated soil.

C. Contaminated soil excavation shall be conducted to prevent mixing with soil outside of the excavation limits.

D. No backfill shall be introduced to any contaminated soil excavation without approval by the Engineer. Engineer approval will be granted based on the results of the verification samples collected from the excavation.

3.06 DEWATERING

A. For all excavations, the Contractor shall provide suitable equipment to remove water that may accumulate in the excavation and filter any sediment prior to discharge Contaminated soil excavation and backfill placement is to be carried out under dewatered…