A04 Revised SOW_FtTomkinsRoofVegRem rev 12-3_0001.pdf

STATEMENT OF WORK (SOW)

PMIS 165464 – Ft. Tomkins Roof Vegetation Clearing in The Staten Island Unit of Gateway

N.R.A.

STATEMENT OF WORK

1.0 Background

2.0 Scope

3.0 Objectives

4.0 Tasks

5.0 Delivery

6.0 Government-Furnished Property

7.0 Security

8.0 Place of Performance

9.0 Period of Performance

10.0 Deliverables and Payments

11.0 Site Plan, Photos and Addenda

1.0 Background

A. The vegetated roof and counterscarp of Ft. Tomkins has been allowed to develop woody vegetation. In keeping with the correct historical appearance, woody vegetation needs to be removed and the areas maintained as turf or meadow. On the soil-covered roof of Ft.

Tomkins, there is also the potential of trees being blown over and exposing soil, allowing erosion to occur.

B. Only Ft. Tomkins within Ft. Wadsworth, Staten Island of Gateway National Recreation Area is included in this Statement of Work.

2.0 Scope

This project will provide services for removal of trees and other woody vegetation. The work will encompass the Ft. Tomkins, Staten Island location of Gateway National Recreation Area.

3.0 Objectives

The objectives of this project are to remove trees, vines and underbrush from the vegetated roof and counterscarp of Ft. Tomkins. Most of the trees on the vegetated roof are small, 1” to 5” caliper size, and so can be felled without first removing branches. There are trees larger than 6” DBH on the counterscarp. Some desirable trees on the counterscarp will remain and may require pruning of limbs which pose a hazard or removal of invasive vines. An inventory of the trees larger than 3” DBH on the counterscarp has been completed and is included as an attachment.

4.0 Tasks

A. Contractor shall supply all labor, materials, tools and equipment for the tasks that are listed under this item. All tools and equipment shall meet current ANSI and OSHA safety standards.

B. Before woody vegetation removal begins, the Contractor shall thoroughly survey the site and surrounding area and carefully note all environmental and human factors which may be adversely affected by the intended tree removals. These factors may include but are not limited to: illegal entry into the work area by people and pets; proximity to existing structural features; existing valuable plants including large trees and roots both on and off the site, and slopes with the potential for erosion problems. Potential problems should be brought to the attention of the Project Manager or his/her designated representative. The Project Manager or his/her designated representative may suggest an alternate removal strategy or eliminate the work in sensitive areas. The contractor shall be liable for any damage to existing trees, plants, park structures and any other property caused by tree removal operations. There are many native trees on the counterscarp which are to remain. The trees are marked with ribbon. The Contractor shall verify all trees which are to remain with the Project Manager.

Where pruning is directed, it shall be done with the aim of removing hazardous limbs and reducing potential damage from strong winds. The contractor is advised that the only existing access to the roof is via a narrow, steep stairway. The contractor should be prepared to utilize equipment that will facilitate efficient and safe access to the roof for personnel and equipment as well as the removal of cut material. Vehicles will be able to access the space between the counterscarp and the walls of the fort. For estimating purposes, refer to the table of removal quantities by size range in the addenda section.

C. Contractor shall be responsible for compliance with State regulations regarding agricultural pests, including spotted lanternfly (SLF) https://nysipm.cornell.edu/environment/invasive-species-exotic-pests/spotted-lanternfly/ ) throughout the duration of the project. Spotted Lantern Fly has been found on this site. Prior to removal of any vegetation, the contractor should conduct and document results of visual survey for Spotted Lantern Fly presence and infestation. If SLF is detected present, the contractor will immediately notify the NPS Project Manager and follow State of New York protocol for reporting SLF presence. If SLF infestation is detected, additional stipulations may be identified by the NPS and New York to prevent and limit the potential expansion of infestation area. Survey findings will be reported to NPS Project Manager.

D. Herbicide work:

i. All tree and shrub removals shall include treatment of stumps with herbicide to prevent re-growth. Accord XRT II or Garlon 4 Ultra shall be applied to the cambium of the cut stump at 100% strength immediately after cutting. Stumps shall be left a minimum of 1’ high for treatment. The herbicide shall also be applied to the bark in a 6” to 12” wide band around the stump. This work shall take place between June 1st and https://nysipm.cornell.edu/environment/invasive-species-exotic-pests/spotted-lanternfly/ https://nysipm.cornell.edu/environment/invasive-species-exotic-pests/spotted-lanternfly/

February 28th. No work using this method shall be done between March 1st and May 31st. For stumps larger than 6” diameter, a procedure shall be followed to promote decay:

1. Bark shall be removed down to ground level.

2. Drill a series of holes in the stump, ¾” to 1” in diameter, 6” deep, and 2-3” apart.

3. Fill holes with a mixture of one part screened compost, one part screened topsoil, and one part organic slow-release, high-nitrogen fertilizer such as feather meal or cottonseed meal.

ii. In cases where Poison Ivy or invasive vines such as Porcelainberry, Wisteria, or Honeysuckle are present, the vines shall be cut off at one foot out from ground level and a minimum of 7’ above ground level in situations where the trees are to remain.

The stumps shall be treated with Accord XRT II or Garlon 4 Ultra at 100% concentration to prevent re-sprouting. The herbicide shall be applied in a 6” to 12” wide band around the stump. This work shall take place between June 1st and February 28th. No work using this method shall be done between March 1st and May 31st.

iii. Vines may also be treated with a foliar spray when leafed out, between June 1st and September 30th. Foliar Spray for Porcelainberry or Wisteria shall be Accord XRTII, Garlon 4 Ultra, and Arborchem NPD. Use 4% solution Accord XRTII, 2% Garlon 4 Ultra, and 2% basal oil in water. For all other vine species, use Accord XRTII at a 2% solution in water. Dead vegetation may be cut 30 days after application.

iv. Follow-up sprays and cuttings will be done twice (as needed) during the period of the contract between the months of June and September, or as noted above for particular vine species, with the final treatment being done within two months of the end of the contract. The contract time may be extended to ensure that treatments are done within the months noted. Vines and trees that sprout from seed during this period shall also be treated.

v. Precautions shall be taken to minimize herbicide damage to existing herbaceous plant material.

vi. A NYSDEC state licensed herbicide/pesticide applicator licensed for Category 3A for Ornamentals, Shade Trees, and Turf shall be on site when herbicide work is done and shall oversee or perform the herbicide work. The applicator should be prepared to produce the license on request. Herbicides shall be applied in accordance with the product label and any other Federal or State rules and regulations. The applicator, or someone on the crew, shall be able to recognize the invasive vines noted for special treatment to avoid indiscriminate application of herbicides.

vii. Foliar sprays of herbicides shall not be done when wind speed is greater than 5 miles per hour or when the temperature is above 80 degrees Fahrenheit or when foliage to be treated is wet, suffering from drought or entering the dormant stage. If rain occurs within 6 hours of herbicide application, re-application may be required as per the decision of the Project Manager or his/her designated representative.

viii. The contractor may propose alternate methods of herbicide application. The goal is eradication of woody plants within the areas noted. Alternate methods shall be approved in writing by the Project Manager.

E. Waste Removal: All tree trunks, limbs and cut brush shall be removed from the site. It may be chipped with a wood chipper and contained in a box truck or trailer attachment for hauling away. Wood chips shall become the property of the contractor and shall be disposed of in accordance with State and Local laws and regulations.

F. Vegetation Removal Operation:

i. The Contractor shall present a work plan to the Project Manager which indicates the equipment to be used and the methods of work. The plan shall be approved by the Project Manager before the start of work.

ii. A brush mower or brush hog may be used on the counterscarp, provided that it is not used in the space between the chain-link fence and the wall.

iii. A stump grinder may be used for stumps larger than 6” for stumps on the counterscarp, in lieu of herbicide treatment of stumps. Only tracked, self-propelled stump grinders may be used to minimize disturbance and soil compaction. The Contractor remains responsible for re-sprouts should any occur.

iv. Avoid driving equipment over curbs and on concrete sidewalks wherever possible.

NPS reserves the right to limit the size of vehicle used within its property and may require tree removals to be performed by a climber rather than a bucket truck.

Plywood or matting shall be used to prevent wheel ruts.

v. Any wheel ruts, holes or divots in lawn areas caused by the work shall be repaired by the contractor. Any bare soil areas created by the work shall be seeded with a native grass seed mix designed for the Northeast US region such as Northeast Native Grass Seed Mix by American Meadows or Eastern Ecotype Native Grass Mix by Ernst Seeds. Seed shall be applied at a rate of ½ pound per 1,000 square feet.

F. Safety Plan:

i. Contractor shall provide a safety plan for the general removal activities including cutting operations, working on the roof, and motor vehicle usage.

ii. The safety plan shall refer to the attached work diagram and include provision for fall prevention equipment and methods of work. Fall prevention equipment to be used shall be presented for inspection before the start of work.

iii. The attached work diagram presents suggested safe methods of work. The contractor may present alternate methods.

iv. Due to the extensive nature of the poison ivy, contractor shall include a section of the safety plan that addresses personnel safety in working with and around poison ivy plants.

v. The herbicide applicator and other personnel present on the site during herbicide application shall be outfitted with proper protective gear and clothing as indicated by the New York State Department of Environmental Conservation (NYSDEC) and/or the herbicide manufacturer.

vi. In locations where herbicide work is done, the contractor shall place signage along the perimeter to inform the public of herbicide usage in compliance with all provisions of the NYC Neighborhood Notification Law.

vii. The safety plan, safety equipment, and all personal protective equipment (PPE) is subject to the approval of the Park Safety Officer.

5.0 Delivery

A. This project shall continue from start to finish on successive days until completion is reached. Allowances are made for inclement weather and the seasonal restrictions of herbicides.

B. Contractor may assign separate crews with approval of the contracting officer and commensurate with Park staff oversight.

C. Working hours are from 7:00 am to 5:30 pm.

6.0 Government-Furnished Property

There will be no government furnished property for this Statement of Work. Contractor may use public restrooms at the work site. Storage of equipment on site may be allowed in certain cases.

Written permission from the Project Manager will be required.

7.0 Security

There are no specific security requirements for this Statement of Work. Access to the inside of Fort Tomkins and the space between the counterscarp and the fort is controlled by the NPS rangers on site.

8.0 Place of Performance

The work shall be performed at Fort Tomkins, which is within Fort Wadsworth on Staten Island.

See air photo plan for limits of work. Limits of work shall be verified on site before the start of work.

9.0 Period of Performance

A. Period of performance shall be 365 days from issuance of the Notice to Proceed.

The time period is meant to allow for treatment of any re-sprouts of vines, shrubs, or trees. Vegetation removal work shall begin within 30 days of the date of the NTP letter provided that seasonal treatment requirements of herbicides can be met. The contract time may be extended to ensure that herbicide treatments are done within the months noted and follow-up treatments are completed. Contractor may assign separate crews with approval of the contracting officer and commensurate with Park staff oversight.

B. Tree, vine and underbrush removal work may only be done in the months specified in section 4.0-C due to the requirements of the herbicide treatments.

C. Working hours are from 7:00 am to 5:30 pm.

D. Contractor shall prepare a schedule for this project. Scheduling will be crucial to inform park staff, residents and visitors of the events that may affect work areas.

10.0 Deliverables and Payments

This contract is a firm fixed price (FFP) order. Payments shall follow the schedule outlined in the table below.

Deliverable Due Date Invoice Amount Work Safety Plan 30 days after award date 1/7th of contract amount Bond 30 days after award date 1/7th of contract amount Mobilization 30 days after award date 1/7th of contract amount Vegetation Removal Complete

90 days after award date 1/7th of contract amount

Initial Herbicide Treatments Complete

90 days after award date 1/7th of contract amount

First Follow-up Herbicide Treatment Complete

180 days after award date 1/7th of contract amount

Second Follow-up Herbicide Treatment Complete

350 days after award date 1/7th of contract amount

11.0 Site Plan, Photos and Addenda

The contractor shall refer to the attached aerial photo plan for determining the area of woody vegetation to be removed or thinned.

Zoom in as needed for readability. A larger version of the aerial photo will be made available on request.

Counterscarp Tree Removal Quantities by Size Range Note: quantities shown are for the strip between the fence and tree line.

Size Range 3” to 6” 6” to 12” 12” to 18” 18” to 24” 24”+ Quantity 62 50 17 7 5

Woody Vegetation Removal

Woody Vegetation Removal Limit

Stump Grinder/Chipper set up in Parking Lot at Bldg. 120 initially.

Safe Zone - Barrier Tape. All Work beyond this barrier (east) shall be done by platform lift from the escarpment.

Haul Brush

Haul Brush

Red Line is a harness lifeline tie-off. Employees working on interior edges shall be tied off with a fall protection safety harness. Harness lifeline tie-off shall be secured to fixed objects and checked by a supervisor.

Ladder Access

Unstable Chimney - avoid clearing in proximity, treat w/ herbicide

View of existing roof in winter showing typical woody vegetation.

Most trees on the roof are in the size range seen here. The roof access doorway is visible on the right.

View looking east on roof.

Typical woody vegetation on roof

The parade grounds can be seen on the right in this view.

Access to this space is through a sallyport with very limited clearance. Only smaller vehicles can use it.

12.0 Covid-19 Letter

The contractor agrees to the terms of the protocols outlined in the attached Covid-19 Letter.