Specifications_Combined_FINAL.pdf

TECHNICAL SPECIFICATIONS

MARIPOSA GROVE RESTORATION

PHASE 5

PMIS/PKG. NO. 206431

MARCH 2016

NATIONAL PARK SERVICE

SERVICE CENTER

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TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 11 00 Summary of Work

01 20 00 Payment Procedures

01 26 00 Contract Modification Procedures

01 27 00 Definition of Contract Line Items

01 31 00 Project Management and Coordination

01 32 16 Construction Schedule

01 33 23 Submittal Procedures

01 35 13.22 Archeological Protection

01 35 23 Safety Requirements

01 35 50 Natural, Cultural & Physical Resources Protection

01 40 00 Quality Requirements

01 42 00 References

01 50 00 Temporary Facilities and Controls

01 55 26 Traffic Control

01 56 39 Temporary Tree and Plant Protection

01 57 19.12 Noise and Acoustics Management

01 57 23 Temporary Storm Water Pollution Prevention

01 67 00 Product Requirements

01 73 29 Cutting and Patching

01 73 40 Execution

01 74 19 Construction Waste Management and Disposal

01 77 00 Closeout Procedures

01 78 23 Operation and Maintenance Data

01 79 00 System Startup, Demonstration and Training

01 81 13 Sustainable Design Requirements for Non LEED™ Projects

01 91 14 Total Building Commissioning

DIVISION 02 – EXISTING CONDITIONS

02 41 00 Demolition

DIVISION 03 – CONCRETE

03 30 00 Cast-in-Place Concrete

DIVISION 04 – MASONRY

04 43 00 Stone Masonry

DIVISION 05 – METALS

05 50 00 Metal Fabrications

05 52 13 Pipe and Tube Railings

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DIVISION 06 – WOOD, PLASTICS, AND COMPOSITES

06 10 00 Rough Carpentry

06 13 13 Heavy Timber Construction

06 13 24 Structural Glued-Laminated Timber

06 15 00 Wood Decking & 1.3 Submittals

06 20 00 Finish Carpentry

06 41 00 Architectural Wood Casework

DIVISION 07 – THERMAL AND MOISTURE PROTECTION

07 13 00 Sheet Waterproofing

07 21 00 Thermal Insulation

07 25 00 Weather Barriers

07 31 29 Wood Shingles and Shakes

07 46 23 Wood Siding

07 62 00 Sheet Metal Flashing and Trim

07 90 05 Joint Sealers

DIVISION 08 – OPENINGS

08 11 13 Hollow Metal Doors and Frames

08 15 73 Sliding Wood Doors

08 31 00 Access Doors and Panels

08 54 13 Fiberglass Windows

08 62 00 Unit Skylights

08 71 00 Door Hardware

08 80 00 Glazing

DIVISION 09 – FINISHES

09 21 16 Gypsum Board Assemblies

09 30 00 Tiling

09 77 33 Glass Fiber Reinforced Plastic Panels

09 90 00 Painting and Coating

DIVISION 10 – SPECIALTIES

10 14 00 Signage

10 21 13 Toilet Compartments

10 28 00 Toilet Accessories

DIVISION 12 – FURNISHINGS

12 93 00 Site Furnishings

DIVISION 13 – SPECIAL CONSTRUCTION

13 42 03 Vault Toilets

13 44 40 Pre-Manufactured Buildings

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DIVISION 22 – PLUMBING

22 05 01 Plumbing General Provisions

22 05 29 Supports, Hangers, Anchors and Sleeves for Plumbing

22 05 50 Access Doors in General Construction for Plumbing

22 05 53 Systems Identification for Plumbing

22 07 19 Insulation

22 11 00 Domestic Water Systems

22 12 19 Facility Ground-Mounted, Potable-Water Storage Tanks

22 13 00 Drainage Systems

22 21 13 Plumbing Piping and Accessories

22 32 00 Domestic Water Filtration Equipment

22 33 00 Domestic Water Heating System

22 40 00 Plumbing Fixtures

22 64 13 Propane Gas System

DIVISION 23 – HEATING VENTILATING AND AIR CONDITIONING

23 05 01 Mechanical General Provisions

23 05 19 Meters, Gauges and Thermometers

23 05 29 Supports, Hangers, Anchors and Sleeves

23 05 48 Vibration Isolation and Seismic Restraints

23 05 53 Systems Identification

23 05 93 Mechanical Systems Balancing

23 07 00 Insulation

23 08 00 Commissioning of HVAC

23 08 01 General Mechanical Starting and Testing Requirements

23 08 11 Mechanical Equipment - Equipment Starting and Testing

23 09 93 Automatic Control Sequences

23 31 00 Ductwork

23 33 13 Dampers

23 34 00 Fans

23 37 00 Air Outlets and Inlets

23 40 00 Air Filters and Cleaners

23 51 00 Chimneys and Vents

23 55 33 Fuel-fired Unit Heaters

23 72 00 Air-to-Air ERV Equipment

DIVISION 26 – ELECTRICAL

26 01 00 Basic Electrical Requirements

26 05 00 Common Work Results for Electrical

26 05 19 600V Wire and Cable

26 05 26 Grounding and Bonding for Electrical Systems

26 05 29 Hangers and Supports for Electrical Systems

26 05 33 Raceway and Boxes for Electrical Systems

26 05 53 Identification for Electrical Systems

26 24 16 Panelboards

26 27 26 Wiring Devices

26 28 13 Fuses

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26 28 16 Enclosed Switches and Circuit Breakers

26 29 13 Enclosed Controllers

26 32 13 Engine Generator System

26 33 23 Central Battery Inverter Equipment

26 36 00 Transfer Switches

26 50 00 Luminaires and Accessories

DIVISION 27 – COMMUNICATIONS

27 15 23 Fiber Optic Cable System

27 20 00 Communication Equipment

27 42 17 Changeable Message Signs

DIVISION 28 – ELECTRONIC SAFETY AND SECURITY

28 20 00 Vehicle Detection

28 23 23 Detector Poles and Foundations

DIVISION 31 – EARTHWORK

31 10 00 Site Clearing

31 20 00 Earth Moving

31 23 19 Dewatering

31 50 00 Excavation Support and Protection

DIVISION 32 – EXTERIOR IMPROVEMENTS

32 12 16 Asphalt Paving

32 13 13 Cement Concrete Paving

32 13 13.13 Washed Aggregate Finish Concrete

32 14 02 Unit Pavers

32 32 23 Rock Walls

32 80 00 Irrigation

DIVISION 33 – UTILITIES

33 05 26 Utility Identification

33 10 00 Water Distribution

33 13 00 Disinfection of Water Lines

33 30 00 Sanitary Sewage Systems

33 39 13 Sewer Manholes, Frames, and Covers

33 41 00 Drainage Systems

DIVISION 40 – PROCESS INTEGRATION

40 63 50 PLC & OI Hardware

40 67 40 Control Panels

40 68 20 PLC & OI Applications Programming

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02/2016 SUMMARY OF WORK

SECTION 01 11 00 – SUMMARY OF WORK

PART 1 – GENERAL

1.1 RELATED WORK

A. All Specification Sections of this Project.

1.2 DEFINITIONS

A. The following terms, when used in the Contract Documents, shall have the meanings listed:

1. COR – “Contracting Officer Representative”

2. YNP – “Yosemite National Park”

3. Acceptable – “acceptable to the Contracting Officer”

4. Perform – “perform all operations required to complete the work referred to in accordance with the intent of the Contract Documents"

5. Provide – “furnish and install the work referred to including proper anchorage, connection to required utilities or other work, testing, adjustment and startup ready to put in service and perform the intended function”

6. Required – “required by the Contract Documents or required to complete the Work and produce the intended results”

7. Satisfactory – “acceptable to the Contracting Officer”

8. Shown – “as indicated on the Drawings”

9. Site – “geographical location of the Project and land within the work area shown on the contract drawings and within which the Work will be installed or built”

10. Specified – “as written in the Contract Documents including the Specifications and the

Drawings”

11. Submit – “Submit to the Contracting Officer Representative”

1.3 SUMMARY

A. This Section includes the following:

1. Work covered by the Contract Documents.

2. Work under other contracts.

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3. Contractor use of premises.

4. Public use of site.

5. Work Site Limitations

6. Occupancy requirements for buildings.

7. Work Restrictions.

8. Special Construction Requirements.

9. Soils Investigation Report.

10. Additional Reports.

1.4 LOCATION

A. Project Location: Yosemite National Park (Mariposa Grove, California).

1.5 WORK COVERED UNDER THIS CONTRACT

A. Work under this contract shall be Phase 5 and include the following:

1. Phase Five: This phase includes modification of existing SWPPP BMPs required for commencement of Phase Five work (as shown on the Phase Five Construction

Drawings), construction of lower Grove area restroom/utility building, pedestrian plaza and shuttle stop shelter, installation of SCADA system, striping and installing signage in lower Grove area and Grizzly Giant parking, installation of lower Grove area shuttle furnishings, repair of upper Grove area water line, replacement of South Entrance water line, new water tank, construction of South Entrance parking complex and visitor contact building, reconstruction of a section of Mariposa Grove road, construction of new sewer main and South Entrance On-site Wastewater Treatment System (OWTS), and Four Mile

Road surfacing. Work under this contract shall be substantially completed by May 23, 2017.

1.6 WORK UNDER OTHER CONTRACTS

A. General: Cooperate fully with separate contractors so work on those contracts may be carried out smoothly, without interfering with or delaying work under this Contract. Coordinate the Work of this Contract with work performed under separate contracts.

B. Preceding Work: NPS’s crews will perform work associated with several Phases of Mariposa

Grove Project. The following activities are scheduled to be substantially complete before work under this Contract begins:

1. Phase One: This phase includes Wawona Point rehabilitation, construction of Grizzly

Giant accessible trail, lower Grove area and Grizzly Giant tree removal, South Entrance tree removal at Four Mile Road for portions of the leach field, and installation of

Stormwater Pollution Prevention Plan (SWPPP) Best Management Practices (BMPs) described in the Phase One Construction Drawings. Work for this phase will be completed by Yosemite National Park Crews.

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C. Concurrent work: NPS’s crews will perform work associated with Phase 2 and 3 of Mariposa

Grove Project. The following activities will occur concurrently with work being performed under this contract.

1. Phase Two: This phase includes the upper Grove area hydrological restoration

(installation of culverts and out sloping of road) removal of portion of lower Grove area

Tram Road, lower Grove area select demolition, daylighting creek, and rough hydrological restoration in boardwalk area, re-surfacing road between Grizzly Giant parking lot and Wawona Point, preparation for lower Grove area restoration, South

Entrance Tree Removal (other than scope listed in Phase One), modification of SWPPP

BMPs required for commencement of Phase Two work (as shown on the Phase Two

Construction Drawings).

2. Phase Three: This phase includes construction of the lower Grove area accessible boardwalk loop, lower Grove area Restoration, and modification of SWPPP BMPs required for commencement of Phase Three work (as shown on the Phase Three

Construction Drawings).

3. Phase Four: This phase includes modification of existing SWPPP BMPs required for commencement of Phase Four work (as shown on the Phase Four Construction

Drawings), removal of upper Grove area asphalt surfacing, removal of lower Grove area parking lot, removal of portions of lower Grove area tram road, construction of lower

Grove area Bypass Road, road to Grizzly Giant and Grizzly Giant parking lot, lower

Grove area rough grading, construction of lower Grove area septic system, including leach field, and septic pumps (including installation of temporary generator), installation of lower Grove area underground utilities, construction of lower Grove area parking, installation of concrete pavement, cement concrete curbs and asphalt concrete pavement, installation of base course of sidewalk, and salvage of duff and topsoil. This work is expected to be substantially complete by June 30, 2016. The Phase 4 contractor will complete the stockpile of structural fill materials for use by the Phase 5 Contractor by

July 1, 2016. The lower Grove building site will be available to the Phase 5 contractor by

August 1, 2016.

D. Other concurrent work: FHWA plans to award a contract to begin the construction of a roundabout at the South Entrance intersection and the pavement restoration and improvements to Mariposa

Grove Road between the South Entrance intersection and the lower Grove area, as well as pavement restoration to the southern 1-mile of Wawona Road beginning on October 1, 2016. The

Contractor shall coordinate work and access to the road through the project site with the FHWA contractor.

1. The Contractor is required to have all contract utilities, septic tanks, retaining walls, curbs, gutters and any other contract features/structures installed within the Mariposa

Grove Road corridor, Wawona Road corridor, and South Entrance Intersection corridor by October 1, 2016, such that it will not impede the FHWA contract road work.

1.7 GOVERNMENT-FURNISHED MATERIALS AND EQUIPMENT

A. Wood benches shown on South Entrance plaza (Drawing L5.10) and Lower Grove plaza (Drawing

L5.13) will be furnished by NPS and shall be installed by contractor as shown on construction drawing or as directed by COR.

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1.8 CONTRACTOR’S USE OF PREMISES

A. The Contractor’s use of the premises is restricted to the designated work areas, including staging area(s) allocated for Contractor’s use and shown on the drawings or as approved by COR. In addition, and as specified below, the contractor may move personnel, equipment, and material on park roads and trails for the purpose of performing the work, subject to restrictions described in the

Contract Documents. General information about the use of YNP facilities is available in the following publications: Yosemite Official Map and Guide and Yosemite Guide. These are available at YNP entrance stations, visitor centers, and online at www.nps.gov/yose/index.htm.

Contractor personnel shall at all times comply with all published regulations of YNP.

B. Confine storage of materials in staging areas or other locations within the project boundary as previously reviewed and approved by YNP. All material storage areas must be defined and approved prior to the start of construction.

C. Temporary Lodging: Contractor is urged to provide rooms for personnel outside of the Park and to provide shuttle transportation to and from the work site.

D. Construction Camp: Establishment of a camp within the park will not be permitted, except for establishing a field office (trailer) at either or both of the trailer sites shown on the Drawings.

E. Contractor Employee Parking: Contractor employee parking is permitted only within the construction staging area. If staging areas are not located near to the work site Contractor’s employees shall carpool to and from the work site. Parking spaces are limited to (3) in lower Grove

Lot. No contractor employee parking is allowed beyond the lower Grove Area.

F. Hauling Restrictions: See Specification Section 01 55 26 “Traffic Control.”

1.9 PUBLIC USE OF SITE

A. Mariposa Grove will be closed to the public during work completed under this contract, except for special tours in which the Government will coordinate with the Contractor and provide 48 hours’ notice. Signage indicating closure will be posted by NPS Crews. The closure will occur at the intersection of Mariposa Grove Road and Wawona Road intersection. Additional Road closures require a request in writing submitted to the COR. Note: During all road closures, emergency access must be maintained at all times. COR concurrence required in advance for all road closures.

B. Contractor shall protect the public from all construction hazards.

1.10 OCCUPANCY REQUIRMENTS FOR BUILIDINGS

A. Existing Buildings

1. There are no buildings within the project site that will be occupied by the Government during the duration of the contract.

B. New Buildings

1. Government Occupancy of Completed Areas of Construction: Government reserves the right to occupy and to place and install equipment in completed areas of building, YOSE - 206431 01 11 00 - 5 provided such occupancy does not interfere with completion of the Work. Such placement of equipment and partial occupancy shall not constitute acceptance of the entire project.

a. Contracting Officer will prepare a Beneficial Occupancy letter for each specific portion of the Work to be occupied before Government occupancy.

b. Obtain a Certificate of Occupancy from the NPS before Government occupancy.

c. Before partial Government occupancy, mechanical and electrical systems shall be fully operational, and required tests and inspections shall be successfully completed. On occupancy, Government will operate and maintain mechanical and electrical systems serving occupied portions of building.

d. On occupancy, Government will assume responsibility for maintenance and custodial service for occupied portions of building.

1.11 WORK SITE LIMITATIONS

A. Rain, seasonal snow, and snowmelt flooding may interfere with construction at the work location.

Snow plowing of main access routes into Mariposa Grove will be performed by the Government only when required for public safety or convenience. Plowing of access roads to and within the project work area is the responsibility of the Contractor.

B. The Park or park roads may be closed by the Government during emergencies. Park roads are frequently congested by tourist traffic during the summer months, weekends, and holiday periods.

The Contractor shall take into consideration operational limits on site access.

C. No work shall be performed at the lower Grove area prior August 1 st , 2016 unless otherwise approved by COR.

1.12 CONDUCT OF OPERATIONS

A. At all times the contractor shall conduct his operations in conformance with the rules and regulations promulgated by the Secretary of the Interior for the National Park Service, and applicable park rules and regulations prescribed by the Park Superintendent.

B. Work on Saturdays, Sundays, Federal holidays or at night may not be performed without prior consent from the Contracting Officer’s Representative. Submit requests 48 hours in advance of the work to the Contracting Officer for approval.

C. Comply with all applicable regulations and policies during the removal and remediation of asbestos, lead paint, and polychlorinated biphenyls.

D. No signs or advertisements (except those specified herein) shall be displayed on the construction site or within the park unless approved by the Contracting Officer.

E. Contractor shall remove all tools, equipment, barricades, signs, surplus materials, rubbish, debris, including visible concrete, timber and metal pieces from the project work limits upon project completion.

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F. Contractor shall repair any asphalt surfaces that are damaged due to work on the project to original condition.

1.13 WORK RESTRICTIONS

A. On-Site Work Hours: Work shall be generally performed during normal business working hours of

7:00 a.m. to 7:00 p.m., Monday through Friday, except when otherwise indicated.

B. Contractor shall comply with all Natural, Cultural & Physical Resources Protection measures specified in Section 013550.

C. Existing Utilities

1. Call Underground Services Alert (USA North) @ 1-800-227-2600 for utility locating prior to starting work. NPS utilities require 14 calendar days advanced notice to locate utilities in the park.

2. Existing Utilities: Notify Contracting Officer and utility companies of proposed locations and times for excavation.

3. Contractor shall be responsible for locating and preventing damage to known utilities. If damage occurs, repair utility at no additional expense to the Government.

4. If damage occurs to an unknown utility, repair utility. An equitable adjustment will be made in accordance with the Changes clause of the contract.

D. Existing Utility Interruptions: Do not interrupt utilities serving facilities occupied by Government or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated:

1. Notify Contracting Officer not less than seven (7) working days in advance of proposed utility interruptions.

2. Do not proceed with utility interruptions without Contracting Officer’s written permission.

3. See OWTS Plans for requirements for providing sewer service to the ranger office and existing comfort station when the existing OWTS is taken out of service.

4. Provide Contracting Officer a detailed schedule of work for utility interruptions.

5. Water service interruptions do not need a temporary utility service if they are less than 2 hours. For water service interruptions greater than 2 hours, provide temporary portable toilet services per the OWTS plans.

E. Nonsmoking Building: Smoking is not permitted within the building or within 25 feet of entrances, operable windows, or outdoor air intakes.

1.14 SPECIAL CONSTRUCTION REQUIREMENTS

A. Project Website: A project website administered by the NPS will be used for purposes of managing communication and documents during the construction stage.

1. See Section 01 31 00 “Project Management and Coordination” for requirements on using the Project Website.

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B. Contractor shall at all times provide access to NPS emergency and maintenance vehicles between

South Entrance and Wawona Point, as well as along Wawona Road.

C. Contractor shall adhere to the mitigation measures identified in “Appendix A – Mitigation

Measures” attached in the end of this section, where Contractor is listed as the responsible party.

D. Contractor shall complete all work noted in Section 1.6 D above, including temporary asphalt patches for trenching in existing paved sections of Mariposa Grove Road by October 1, 2016. Final asphalt paving of Mariposa Grove Road shall occur in spring 2017 and be coordinated with the

FHWA contractor.

1.15 SOILS INVESTIGATION REPORT

A. A soils investigation report entitled Geotechnical Design Report for Yosemite National Park

Mariposa Grove Restoration has been prepared by Shannon & Wilson and is dated March 12, 2014.

Addendum 1 of that report dated November 5, 2015 addresses the soil conditions at the South

Entrance leachfield site on Four Mile Road.

B. A copy of the report is available upon request to COR. While the records of data obtained may be considered by the Contractor to be correct, any conclusions or recommendations made in the reports are for information to the Design Engineer and are not a part of the Contract Documents.

Groundwater data for monitoring wells in South Entrance and lower Grove area are available upon request.

1.16 ADDITIONAL REPORTS

A. A report entitled Percolation Testing Report, dated June 28, 2013 has been prepared by Shannon and Wilson.

B. Record of Decision for Restoration of the Mariposa Grove of Giant Sequoias has been prepared by the U.S. Department of the Interior National Park Service. Copies of this report will be provided to

Contractor upon request.

C. The Stormwater Pollution Prevention Plan dated October 2014 and updated June 2015 has been prepared by David Evans and Associates, Inc.

D. A table listing all existing trees in the project vicinity including trees previously removed by the park entitled Mariposa Grove Restoration Tree Table dated December, 2014 has been prepared by

David Evans and Associates, Inc.

E. If conflicts occur between the report and drawings or specifications, the drawings and specifications govern.

1.17 PERMITS

A. The Park will provide the following permits:

1. California State Water Resources Control Board NPDES Construction General Permit

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2. Corps of Engineers 404 Nationwide Permit

3. California Central Valley Regional Water Quality Control Board for 401 Water Quality

Certification

4. Mariposa County Environmental Health Systems for On-Site Wastewater Treatment

Permit

5. California Central Valley Regional Water Quality Control Board for On-Site Wastewater

Treatment Permit

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION (Not Used)

END OF SECTION 01 11 00

Yosemite National Park - 20 - Restoration of the Mariposa Grove of Giant Sequoias Record of Decision

Appendix A - Mitigation Measures The following mitigation measures have been incorporated into the Selected Action to avoid or reduce adverse impacts on park resources. Many of these measures and practices are based on the successful giant sequoia ecological restoration project in Giant Forest, Sequoia National Park. These mitigation measures that would occur prior to, during, and after construction of specific management actions.

Mitigation Measure Responsibility

Construction and Design-Related Measures

Apply for and comply with all federal and state permits required for construction-related activities, including Clean Water Act Section 401 and 404.

Yosemite National Park (YNP), Project Manager

Develop an emergency notification plan that complies with park, federal, and state requirements and allows contractors to properly notify park, federal, and/or state personnel in the event of an emergency during construction activities. This plan will address notification requirements related to fire, personnel, and/or visitor injury, releases of spilled material, evacuation processes, etc. Submit the emergency notification plan to the NPS for review/approval prior to commencement of construction activities.

YNP, Project Manager

Notify utilities prior to construction activities. Identify locations of existing utilities prior to removal activity to prevent damage to utilities. The Underground Services Alert and NPS maintenance staff will be informed 72 hours prior to any ground disturbance. Construction-related activities will not proceed until the process of locating existing utilities is completed (water, wastewater, electric, communications, and telephone lines). An emergency response plan will be required of the contractor.

Utilize the guidance in A Sense of Place: Design Guidelines for YNP (NPS 2012) in new construction and design modifications.

Ensure all equipment used in the Grove has a low compaction factor (may include excavator, dozer, backhoe, loader, skid steer, and/or dump truck).

Prior to entry into the park, steam-clean heavy equipment to prevent importation of non-native plant species, tighten hydraulic fittings, ensure hydraulic hoses are in good condition and replace if damaged, and repair all petroleum leaks.

YNP, Project Manager, Contractor

Ensure that construction or restoration actions do not impact the surrounding area, specifically giant sequoia, wetland, or riparian ecosystems or any primary ecological processes, by limiting size and development of staging and construction areas, and confining them to developed or disturbed areas to the extent practicable. Confine work areas within creek channels to the smallest area necessary. Store all construction equipment within the delineated work limits.

YNP, Project Manager:

Inspect the project to ensure that impacts stay within the parameters of the project and do not escalate beyond the scope of the environmental assessment, as well as to ensure that the project conforms with all applicable permits or project conditions.

Implement compliance monitoring to ensure that the project remains within the parameters of National Environmental Policy Act (NEPA) and National Historic Preservation Act (NHPA) compliance documents.

YNP, Project Manager:

Provide a project orientation for all construction workers to increase their understanding and sensitivity to the challenges of the special environment in which they will be working

If deemed necessary, demolition/construction work on weekends or federal government holidays may be authorized, with prior written approval of the Superintendent.

Remove all tools, equipment, barricades, signs, surplus materials, and rubbish from the project work limits upon project completion. Repair any asphalt surfaces that are damaged due to work on the project to original condition. Remove all debris from the project site, including all visible concrete, timber, and metal pieces.

YNP, Project Manager;

The park shall develop a Communications Strategy Plan to alert necessary park and Concessioner employees, residents, and visitors to pertinent elements of the construction work schedule.

Yosemite National Park - 21 - Restoration of the Mariposa Grove of Giant Sequoias

Verify utility locations by contacting the Underground Services Alert prior to the start of construction.

Hazardous Materials

Prepare an Oil and Hazardous Materials Spill Prevention, Control, and Countermeasure Plan for the project to address hazardous materials storage, spill prevention, and response. Submit the Plan for park review and approval prior to construction.

Store and use all hazardous materials in compliance with federal regulations. All applicable Materials Safety Data Sheets will be kept on site for inspection.

Prohibit hazardous or flammable chemicals from storage in the staging area, except for substances identified in the Oil and Hazardous Materials Spill Prevention, Control, and Countermeasure Plan. Hazardous waste materials shall be immediately removed from project site in approved containers.

Comply with all applicable regulations and policies during the removal and remediation of asbestos, lead paint, and polychlorinated biphenyls.

Spill Prevention/ Response

Develop and implement a comprehensive spill prevention/ response plan that complies with federal and state regulations and addresses all aspects of spill prevention, notification, emergency spill response strategies for spills occurring on land and water, reporting requirements, monitoring requirements, personnel responsibilities, response equipment type and location, and drills and training requirements. The spill prevention/response plan will be submitted to the park for review/approval prior to commencement of construction activities.

To minimize the possibility of hazardous materials seeping into Contractor soil or water, check equipment frequently to identify and repair any leaks. Standard measures include hazardous materials storage and handling procedures; spill containment, cleanup, and reporting procedures; and limitation of refueling and other hazardous activities to upland/nonsensitive sites. Provide an adequate hydrocarbon spill containment system (e.g. absorption materials, etc.) on site, in case of unexpected spills in the project area. Ensure equipment is equipped with a hazardous spill containment kit at all times. Ensure that personnel are trained in the use of hazardous spill containment kits.

Waste Management

Require construction personnel to adhere to park regulations concerning food storage and refuse management.

Properly secure trash during the workday and remove all trash from site at the end of each workday.

Air Quality and Dust Abatement

Implement and comply with a dust abatement program during construction. Measures include, but are not limited to, the following:

• Water or apply soil stabilizers to disturbed areas;

• Cover and/or seal truck beds and stockpiles to minimize blowing dust or loss of debris;

• Limit truck and related construction equipment speeds in active construction areas to a maximum of 15 miles per hour and strictly adhering to park regulations and posted speed limits in other areas while inside park boundaries;

• Minimize vegetation clearing;

• Re-vegetate post construction.

YNP, Contractor

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Implement equipment exhaust controls during construction. Measures include, but are not limited to, the following:

• Idling times shall be minimized either by shutting equipment off when not in use or reducing the maximum idling time to two minutes. Clear signage shall be provided for construction workers at all access points;

• Require that all construction equipment, diesel trucks, and generators be equipped with Best Available Control Technology for emission reductions of NOx and PM;

• Require all contractors use equipment that meets CARB's most recent certification standard for off-road heavy duty diesel engines;

• Require all equipment operations to occur during daytime hours to minimize effects of local inversions.

YNP, Contractor

Maintain adequate dust suppression equipment and using clean water to control excess airborne particulates at staging areas, active construction zones, and unpaved roads leading to/from active construction areas.

Hydrology, Water Quality, and Wetlands

Prepare an erosion control plan specifying measures to prevent erosion/ sedimentation problems during project construction. The plan would include a map of the project site delineating where erosion control measures will be applied. The following minimum criteria, adapted from the Guidelines for Protection of Water Quality During Construction and Operation of Small Hydro Projects (CVRWQCB 1 983), would be met:

• Where working areas are adjacent to or encroach on live streams, barriers shall be constructed that are adequate to prevent the discharge of turbid water in excess of specified limits.

• Material from construction work shall not be deposited where it could be eroded and carried to the stream by surface runoff or high stream flows.

• All disturbed soil and fill slopes shall be stabilized in an appropriate manner.

• Surface drainage facilities shall be designed to transport runoff in a non-erosive manner.

• Wastewater contaminated with by-products from construction activities shall be contained in a holding or settling tank to prevent contaminated material from entering watercourses or wetlands.

• Waters shall be free of changes in turbidity that cause a nuisance or adversely affect beneficial uses.

Increases in turbidity attributable to controllable water quality factors shall not exceed the following limits, as described in The Water Quality Control Plan for the Central Valley Regional Water Quality Control Board (CVRWQCB 1998). In determining compliance with the limits below, appropriate averaging periods may be applied, provided that beneficial uses will be fully protected:

o Where natural turbidity is between 0 and 5 nephelometric turbidity units (NTUs), increases shall not exceed 1 NTU.

o Where natural turbidity is between 5 and 50 NTUs, increases shall not exceed 20% of the natural turbidity.

o Where natural turbidity is between 50 and 100 NTUs, increases shall not exceed 10 NTUs.

o Where natural turbidity is greater than 100 NTUs, increases shall not exceed 10%.

• Implement stormwater management measures to reduce nonpoint-source pollution discharge. This could include measures such as oil/sediment containment or street sweeping.

• Remove hazardous waste materials generated during implementation of the project from the project site immediately.

• Dispose of volatile wastes and oils in approved containers for removal from the project site to avoid contamination of soils, drainages, and watercourses. Keep absorbent pads, booms, and other materials onsite during projects that use heavy equipment to contain oil, hydraulic fluid, solvents, and hazardous materials spills.

• Final design and installation of site drainage improvements will be closely coordinated with the park's Resources Management and Science Division.

• Salvage hydric soils and use them as fill in wetland excavations to the maximum extent possible.

Minimize use of fill materials with high permeability in wetland areas to prevent development of unnatural groundwater conduits.

• Incorporate trench plugs into new and abandoned utility corridors through wetland areas where required to prevent formation or continuation of groundwater conduits.

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Develop and implement a comprehensive stormwater pollution prevention plan for construction activities that complies with federal and state regulations and addresses all aspects of stormwater pollution prevention. The plan will be submitted to the park for approval prior to construction activities. The plan will include measures such as:

• Take measures to control erosion, sedimentation, and compaction, and thereby reduce water pollution and adverse water quality effects. Use silt fences, sedimentation basins, etc. in construction areas to reduce erosion, surface scouring, and discharge to water bodies.

• To the extent possible, schedule the use of mechanical equipment during periods of low precipitation to reduce risk of accidental hydrocarbon leaks or spills. When mechanical equipment is necessary outside of low precipitation periods, use NPS-approved methods to protect soil and water from contaminants.

• Dispose of volatile wastes and oils in approved containers for removal from construction sites to avoid contamination of soils and drainages. Inspect equipment for hydraulic and oil leaks prior to use on construction sites, and implement inspection schedules to prevent contamination of soil and water.

Keep absorbent pads, booms, and other materials on site during projects that use heavy equipment to contain oil, hydraulic fluid solvents, and hazardous material spills.

Comply with all Best Management Practices and Mitigation Measures specified in the Wetland Statement of Findings (Appendix C).

Provide proper and timely maintenance for vehicles and equipment used during construction to reduce the potential for mechanical breakdowns.

YNP, Project Manage1;

Use silt fencing at drainages to prevent construction materials from escaping work areas.

Delineate wetlands and apply protection measures during construction. Wetlands shall be delineated by qualified NPS staff or certified wetland specialists and clearly marked prior to work. Perform activities in a cautious manner to prevent damage caused by equipment, erosion, siltation, etc.

During heavy equipment use, keep spill kits on site to prevent water contamination in the case of a spill. To minimize soil compaction when accessing riparian or riverine habitat unhardened by imported rock, place track mats on the ground where equipment will be driven. In areas impacted with imported fill and rock revetment, decompact soils as a final egress with equipment.

Soils, Erosion Control, and Site Preparation

Ensure that any soil or amendment imported from outside the Grove for use in the Grove is checked for pathogens (e.g., root rot) to limit the spread of tree diseases.

Use approved siltation and sediment control devices in construction areas to reduce erosion and surface scouring.

Use approved siltation and sediment control devices appropriate to the situation in grading areas to capture eroding soil before discharge to riparian channels.

Where soils are heavily compacted and are covered with asphalt, soil conditions may be such that reestablishment of vegetation is unlikely without further treatment. Demetry (1997) found that soil impacts most frequently observed in Giant Forest were soil compaction, loss of organic matter, topsoil erosion, and loss or alteration of natural soil structure. Soil compaction was greatest under pavement (Demetry 1997).

Soil conditions in restoration areas of the Mariposa Grove will be tested for compaction, texture, and chemical properties such as organic matter content and nitrogen, and amendments or treatment will be applied accordingly. Listed below is a range of soil treatments available to improve the potential for plant establishment, particularly giant sequoias.

• Measure depth of compaction with a penetrometer and decompact to that depth (typically 6 to 10 inches) (Demetry 1997).

• Decompact soils by hand or with heavy equipment (dozer or skid steer with rippers) under moderately moist conditions (may require 1 week of irrigation if work is completed in late summer or fall).

Yosemite National Park - 24 - Restoration of the Mariposa Grove of Giant Sequoias

• Avoid large roots during decompaction; a rototiller or hand decompaction may be more appropriate in these areas.

• Add locally gathered duff to provide seeds and organic matter.

• If available, add local native soil and topsoil.

• If determined that soil conditions are not conducive to plant reestablishment, amendments such as peat moss, kelp, or other natural fertilizers may be used.

• To provide nutrients to the soil, open cones on adult giant sequoias, and prepare a seedbed, woody debris may be scattered over the area and burned. If woody debris is not available for burning, fuel may be burned at a single location and the ashes mixed into the topsoil of the restoration area.

Depending on the degree of alteration in landform, a variety of recontouring and topography restoration actions may be Implemented as listed below:

• Regrade with existing soil: Where extensive recontouring to natural topography is required (e.g., road cuts), attempt to accomplish this through re-balancing cut and fill.

• Fill: Where additional material is needed, soils of the same type from the Mariposa Grove area is preferable, but soil may need to be imported from South Entrance or other nearby locations.

• Topsoil retention: Wherever removal or compaction of topsoil will occur, salvage and stockpile the top 12 inches of soil, and replace it on the surface. To preserve microbial communities and limit erosion and the establishment of weeds, mulch all soil piles or cover with erosion blankets.

• Leave final grades uneven to provide microhabitat for seed germination and establishment.

After decompacting soils, particularly on sloped areas, erosion potential can be high. Following is a list of available erosion-control measures:

• Duff: Spread locally gathered litter and woody debris over disturbed areas for erosion control and to provide a source of seeds and organic matter.

• Rice straw: If insufficient quantities of duff are available, use rice straw mulch (which is relatively inert and not a source of non-native seeds).

• Erosion-control blankets and/or wattles: Use coconut fiber or rice straw erosion-control blankets and/or wattles only on steep slopes (3:1 or greater) and in unprotected drainages.

• Stones, boulders, limbs, and logs: In conjunction with any other erosion control methods, place these materials (gathered from adjacent areas) on the surface to provide microclimate for plants and to slow water flow.

Special-Status Plants

If special-status plant species are identified within the construction disturbance zone, in particular within restoration and revegetation areas, avoid special-status plant populations to the extent feasible during construction activities.

If it is not feasible for construction activities to avoid special status plant species, species conservation develop measures in coordination with YNP natural resources staff. Measures may include salvage of special- status plants for use in revegetating disturbed areas and transplantation of special-status plants wherever possible using methods and monitoring identified in the revegetation plan, monitoring to ensure successful revegetation, protection of plantings, and replacement of unsuccessful plant materials if practicable.

Soundscapes

Ensure that all construction equipment has functional exhaust/ muffler systems.

Submit a construction work plan/schedule that minimizes construction-related noise in noise-sensitive areas to the park for review/approval prior to commencement of construction activities.

Use hydraulic- or electric- powered construction equipment, when feasible.

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Locate stationary noise sources as far from sensitive receptors as possible.

Limit the idling of motors except as necessary (e.g., concrete mixing trucks).

To the extent possible, perform all on-site noisy work above 76 A-weighted decibels (dBA) (such as the operation of heavy equipment) between the hours of 8:30a.m. and 5:00 p.m. to minimize disruption to nearby park users.

Vegetation and Revegetation

Park policy requires that all machinery brought in to the park is clean prior to entry and inspected by park staff to avoid introductions of invasive species, including seeds. Restoration work frequently involves ground disturbance, which has the potential to introduce and spread non-native plant species. For ground disturbing projects, park staff will survey for and treat invasive plants before and after restoration activities following the guidance of Yosemite's 2011 Invasive Plant Management Plan.

Minimize any impacts on giant sequoias including damage to boles, roots, root zone, and seedling habitat.

Protect rare or sensitive plant species from direct and indirect impact.

Protect restoration areas from further impacts with fencing or appropriate deterrents.

Establish vegetation monitoring plots (both qualitative and quantitative) and photo-document project implementation and results.

There is a range of actions available to revegetate an area with native plants, and a combination of actions will provide the most successful restoration. For any revegetation activities within Mariposa Grove, only locally gathered plant material will be used to retain genetic integrity.

• Natural regeneration: Rely on natural regeneration from adjacent seed sources and duff.

• Seed collection, seed increase, and direct seeding: Plant the area with local native seed. It may not be practical to collect enough seed for direct seeding of the acreage involved. Increasing seed can provide necessary quantities. This process requires 3 years.

• Seed or cutting collection and nursery propagation: Gather local native seeds and cuttings and plant in a nursery setting to provide established plants for planting in restoration areas. Place plants in a manner that mimics natural distribution - not landscaping. This requires 1 to 3 years.

• Plant salvage and transplanting: In cases where plants may be damaged or destroyed when infrastructure is removed, repaired, or relocated, salvage plants and replant them when the area is recontoured to more natural conditions, or in an adjacent restoration site. Store salvaged plants on site, and protect with shade cloth and irrigate as necessary.

• Giant sequoias: Nearly all restoration sites lay within the seed-rain area of adult giant sequoias, so the need for propagating giant sequoias in a nursery setting and planting these trees is not likely to be necessary for germination and recruitment. Rather, prepare sites to facilitate germination, including burning woody debris to provide nutrients and a heat source to open cones on the trees. If seed dispersal does not occur (e.g., adequate heat is not created), hand spread locally collected giant sequoia seeds.

Canopy gaps are integral to successful giant sequoia recruitment. The Giant Forest Restoration Project focused on creating and maintaining gaps as part of the restoration program because according to assessments of existing recruitment and gaps, neither was adequate. However, based on NPS assessment of the giant sequoia population in the Mariposa Grove, many canopy gaps exist in the Grove, and recruitment is relatively high when compared to other giant sequoia groves (Kuhn 2011). Based on this assessment, the park will continue to rely on fire to create and maintain these canopy gaps in Mariposa Grove, and to capitalize on the gaps created by removing existing infrastructure (e.g., parking areas) as areas for giant sequoia recruitment.

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Wildlife and Special-Status Wildlife

Limit the effects of light and noise on adjacent habitat through controls on construction equipment.

Provide adequate education and enforcement to limit construction worker activities that are destructive to wildlife and habitats.

Regulate speeds on the Mariposa Grove Road to reduce the potential for wildlife vehicle collisions.

Based on available anecdotal and scientific evidence, 78 amphibian, reptile, mammal, and bird species occur in the Mariposa Grove and South Entrance project area. Of these 78 species, 13 special status species occur or have the potential to occur in the project area including 6 bird species (northern goshawk, long-eared owl, California spotted owl, Vaux's swift, olive-sided flycatcher, and yellow warbler) and 7 mammal species (pallid bat, Townsend's big-eared bat, spotted bat, western red bat, western mastiff bat, Sierra Nevada mountain beaver, and Pacific fisher).

In order to mitigate impacts to special status species during construction and maintenance activities, we recommend (1) timing construction activities to avoid the most sensitive time periods for special-status animals;

(2) retaining key habitat features for denning, roosting, nesting, and hibernating; and (3) adaptively managing for special-status species through continued targeted surveys during key time periods during the construction and post-construction phases.

Mitigation to protect key habitat features for fishers, bats, and owls:

• Limit the effects of light and noise on adjacent habitat through controls on construction equipment.

• In construction zones, conduct visual/auditory surveys targeting owls and other birds, visual and acoustic surveys targeting bats, and remote camera surveys targeting fishers to inform proper mitigation actions that would reduce impacts on wildlife.

• Avoid disturbing basal hollows (created by repeated fires), deep bark furrows, and cavities and crevices of tree crowns important for bats and other wildlife (Pierson et al 2006).

Snags are an essential habitat element for the majority of special status species documented using the Mariposa Grove. Removal of snags may indirectly result in decreased rates of reproduction and increased rates of mortality for fishers (USDA Forest Service 2001), and spotted owls use cavities in snags for nesting and raising young. If hazard tree (snag) removal cannot be avoided:

• Remove snags only under consultation with the park biologist and park forester. Tree removal should occur outside of sensitive time periods for special status species.

• A wildlife biologist should examine any trees and snags for nesting, denning, or roosting wildlife, or the potential for such use, prior to removal.

YNP, Project Manager.

Mitigation to protect fisher dens:

• Protect all known fisher natal (birthing) and maternal (kit rear1ng) den structures within Yosemite, and any den structures located in the future. This measure is particularly compelling because female fishers have been known to reuse past dens (i.e. same fisher returning to the same den the next season or another female using a den occupied by a different fisher from a previous season) (R Sweitzer, pers. comm.)

• Protect verified fisher birthing and kit rearing dens during fisher denning season (March 1 through June

30) with 700-acre buffers consisting of the highest quality habitat (CWHR size 4 or greater and canopy closure greater than 60%) in a compact arrangement surrounding the den site in the largest, most contiguous blocks available.

• For active dens, within this buffer, (1) enforce a night closure of any paved roads and (2) halt construction, restoration, fire management, or other…