B08_Att_1_Construction_Specifications.pdf

GOLDEN GATE NATIONAL RECREATION AREA

SAUSALITO, CALIFORNIA

Install EV Chargers for GSA Fleet Vehicles at Fort Cronkhite

GOGA

PMIS #325393

CONSTRUCTION SPECIFICATIONS

National Park Service

Pacific West Region

May 4, 2023

GOGA 325387 COMMON WORK RESULTS FOR ELECTRICAL 26 05 00

SECTION 26 05 00 - COMMON WORK RESULTS FOR ELECTRICAL

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions, Division 1 Specification, and the following specification sections, apply to this

1.2 SUMMARY

A. This section includes general electrical requirements for all Division 26 work and is supplemental and in addition to the requirements of Division 1. See Division 01 for sequence of work.

B. It is the intention of this Division of the Specifications and the Contract Drawings to describe and provide for the furnishing, installing, testing and placing in satisfactory and fully operational condition all equipment, materials, devices and necessary appurtenances to provide a complete electrical system. Provide all materials, appliances and apparatus not specifically mentioned herein or shown on the drawings, but which are necessary to make a complete, fully operational installation of all electrical systems shown on the contract drawings or described herein. Connect equipment and devices furnished and installed under other Divisions of this specification under this Division.

C. Workmanship shall be of the best quality and competent and experienced electricians shall be employed and shall be under the supervision of a competent and experienced foreman.

D. The drawings and specifications are complimentary and what is called for (or shown) in either is required to be provided as if called for in both. Where conflicting information occurs within the drawings and specifications or between the drawings and specifications, the more expensive alternative shall be used as a basis for bidding and construction.

1.3 CODES, PERMITS, INSPECTION FEES

A. The following codes and standards are referenced in the Division 26 specifications. Perform all work and provide materials and equipment in accordance with the latest referenced codes and standards of the following organizations:

1. American National Standards Institute (ANSI)

2. National Electrical Manufacturer's Association (NEMA)

3. National Fire Protection Association (NFPA)

4. Underwriter’s Laboratories (UL)

5. National Electrical Contractor’s Association (NECA)

B. Install the electrical systems based on the following:

NFPA 70 National Electrical Code as adopted and amended by the Local Jurisdiction.

IBC International Building Code as adopted and amended by the Local Jurisdiction.

C. The referenced codes establish a minimum level of requirements. Where provision of the various codes conflict with each other, the more stringent provision shall govern. If any conflict occurs between referenced codes and this specification, the codes are to govern.

Compliance with code requirements shall not be construed as relieving the Contractor from complying with any requirements of the drawings or specifications which may be in excess of requirements of the governing codes and rules and not contrary to same.

1.4 COORDINATION

A. Comply with the requirements of Division 1.

B. Coordinate with PG&E for service applications, engineering services, and construction.

1 Apply for new services on Buildings 1066 and 1067. Meter bases have been installed in a previous project, but meters for EV panels have not been installed.

2 Apply for additional load on buildings 1066, 1067, 1068, 1069, and 1070.

3 Coordinate any necessary construction and pay any required utility fees for application and coordination.

C. Furnish, install and place in satisfactory condition all raceways, boxes, conductors and connections and all other materials required for the electrical systems shown or noted in the contract documents to be complete, fully operational and fully tested upon completion of the project. Raceways, boxes and ground connections are shown diagrammatically only and indicate the general character and approximate location. The layout does not necessarily show the total number of raceways or boxes for the circuits required, nor are the locations of indicated runs intended to show the actual routing of the raceways.

Where routings of major raceways pathways are indicated on plan sheets, the routing information supplements the information on diagrams. If no routing information is shown, route the systems in a manner that will coordinate with new and existing infrastructure and the work of other trades.

1.5 WARRANTY

A. Refer to General Requirements of the Contract.

1.6 SUBMITTALS AND SHOP DRAWINGS

A. Submit shop drawings in accordance with Contract Documents and as described in the Division

01 - General Requirements Section of these Specifications.

1.7 PROJECT CLOSE-OUT

A. Coordinate with close-out provisions in Division 01 - General Requirements.

1.8 ELECTRICAL EQUIPMENT OPERATION AND MAINTENANCE (O&M) MANUALS

A. Provide O&M manuals required in Division 01 - General Requirements for all equipment furnished under Division 26 - Electrical of the specifications.

PART 2 - PRODUCTS

2.1 GENERAL

A. All materials and equipment installed shall have been tested and listed by Underwriters

Laboratories.

B. All materials to be new, free from defects and not less than quality herein specified. Materials shall be designated to ensure satisfactory operation and operational life in the environmental conditions which will prevail where they are being installed.

C. Each type of materials furnished shall be of the same make, be standard products of manufacturers regularly engaged in production of such materials and be the manufacturer's latest standard design.

D. All materials, equipment and systems furnished that include provisions for storing, displaying, reporting, interfacing, inputting, or functioning using date specific information shall perform properly in all respects regardless of the century. Any interface to other new or existing materials, equipment or systems shall function properly and shall be century compliant, both in regard to information sent and received.

PART 3 - EXECUTION

3.1 GENERAL

A. All work shall be done in accordance with NECA construction standards.

B. Adhere to industry standards of care for safety, including:

1. Accident Prevention Manual for Industrial Operations, National Safety Council.

2. Occupational Safety and Health Act.

3. ANSI/NFPA 70E, Electrical Safety Requirements for Employee Workplaces.

4. American National Standards for Personnel Protection: Lockout/Tagout.

5. Applicable state and local safety operating procedures.

3.2 PRODUCT DELIVERY, STORAGE AND HANDLING

A. Deliver, store, and handle products according to the manufacturer's recommendations, using means and methods that will prevent damage, deterioration, and loss, including theft. Handle all equipment carefully to prevent damage, breakage, denting, and scoring of finishes. Do not install damaged equipment.

B. Store products subject to damage by the elements above ground, undercover in a weather tight enclosure, with ventilation adequate to prevent condensation. Maintain temperature and humidity within range required by manufacturer's instruction.

3.3 PENETRATION OF BUILDING ELEMENTS

A. General:

1. Penetrations of building elements by electrical systems shall not compromise the performance and integrity of the building element (structural, fire, smoke, waterproof, etc.)

3.4 PAINTING

A. Items furnished under this Division that are scratched or marred in shipment or installation shall be refinished with touchup paint selected to match installed equipment finish.

3.5 EQUIPMENT CONNECTION

A. For equipment furnished under this Division of the specifications, provide all electrical connections necessary to serve such equipment and provide required control connections to all equipment so that the equipment is fully operational upon completion of the project.

Investigate existing equipment to be relocated and provide new connections as required.

3.6 TESTING AND DEMONSTRATION

A. Demonstrate that all electrical equipment operates as specified and in accordance with manufacturer's instructions. Perform tests in the presence of the Contracting Officer’s

Representative (COR). Provide all instruments, manufacturer's operating instructions and personnel required to conduct the tests. Repair or replace any electrical equipment that fails to operate as specified and or in accordance with manufacturer's requirements.

B. Contractor shall remove and replace covers of electrical equipment to permit the COR to observe equipment and wiring provided.

END OF SECTION 26 05 00

GOGA 325387LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES 26 05 19

SECTION 26 05 19 - LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions, Division 01 Specification Sections, and Section 26 05 00, apply to this Section.

1.2 SUBMITTALS

A. Product Data: For each type of product.

B. Field quality-control reports.

PART 2 - PRODUCTS

2.1 CONDUCTORS AND CABLES

A. Manufacturers: Subject to compliance with requirements.

B. Copper Conductors: Comply with NEMA WC 70/ICEA S-95-658.

C. Conductor Insulation: Comply with NEMA WC 70/ICEA S-95-658 for Type THWN/THHN (Thermoplastic Heat and Water Resistant Nylon Coated/Thermoplastic High Heat Resistant

Nylon Coated) and Type THWN/XHHW (Cross-Linked High Heat Water-resistant Insulated

Wire).

2.2 CONNECTORS AND SPLICES

A. Manufacturers: Subject to compliance with requirements.

B. Description: UL listed, factory-fabricated connectors and splices of size, ampacity rating, material, type, and class for application and service indicated.

C. For #14 through #10 AWG wire sizes, provide insulated spring wire connectors or insulated compression connectors.

D. For #8 AWG wire, use solderless pressure connectors with insulating sleeves.

E. For #6 AWG and through #2, optional use split bolt connectors with manufactured insulation covers or tape sufficient to provide 150% insulation level.

F. For #6 and larger: Compression connectors using compression dies designed for the exact connector being terminated. Provide insulting sleeves manufactured specifically for the connector being used. Mechanical termination integral to overcurrent protective devices are also acceptable.

2.3 SYSTEM DESCRIPTION

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

B. Comply with NFPA 70.

PART 3 - EXECUTION

3.1 CONDUCTOR MATERIAL APPLICATIONS

A. Feeders: Copper. Solid for No. 10 AWG and smaller; stranded for No. 8 AWG and larger.

B. Branch Circuits: Copper. Solid for No. 12 AWG and smaller; stranded for No. 10 AWG and larger.

3.2 CONDUCTOR INSULATION APPLICATIONS AND WIRING METHODS

A. Above ground: Type THHN/THWN, single conductors in raceway.

B. Below ground: Type THWN/XHHW, single conductors in raceway.

3.5 INSTALLATION OF CONDUCTORS AND CABLES

A. Complete raceway installation between conductor and cable termination points according to

Section 26 05 33 "Raceways and Boxes for Electrical Systems" prior to pulling conductors and cables.

B. Use manufacturer-approved pulling compound or lubricant where necessary; compound used must not deteriorate conductor or insulation. Do not exceed manufacturer's recommended maximum pulling tensions and sidewall pressure values.

C. Use pulling means, including fish tape, cable, rope, and basket-weave wire/cable grips, that will not damage cables or raceway.

3.6 CONNECTIONS

A. Tighten electrical connectors and terminals according to manufacturer's published torque tightening values. If manufacturer's torque values are not indicated, use those specified in UL

486A-486B.

B. Make splices, terminations, and taps that are compatible with conductor material and that possess equivalent or better mechanical strength and insulation ratings than unspliced conductors.

3.7 IDENTIFICATION

A. Identify and color-code conductors and cables according to Section 26 05 53 "Identification for Electrical Systems."

B. Identify each spare conductor at each end with identity number and location of other end of conductor and identify as spare conductor.

3.8 PENETRATIONS

A. Penetrate fire barriers, smoke barriers, vapor barriers, roofing materials and other rated architectural elements in a manner that preserves the rating of the architectural element.

B. Apply firestopping to electrical penetrations of fire-rated floor and wall assemblies to restore original fire-resistance rating of assembly.

END OF SECTION 26 05 19

GOGA 325387 RACEWAYS AND BOXES 26 05 33

SECTION 26 05 33 - RACEWAYS AND BOXES FOR ELECTRICAL SYSTEMS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions, Division 01 Specification Sections, and Section 26 05 00, apply to this Section.

1.2 SUBMITTALS

A. Product Data: For raceways, wireways and fittings, floor boxes, hinged-cover enclosures, cabinets, and handholes.

PART 2 - PRODUCTS

2.1 GENERAL

A. Listing and Labeling: Products shall be listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

B. Comply with NFPA 70 requirements.

C. Minimum Raceway Size: 3/4-inch (19-mm) trade size.

2.2 METAL CONDUITS, TUBING, AND FITTINGS

A. Manufacturers: Subject to compliance with requirements.

B. Conduit

1.

a. Galvanized Rigid Steel Conduit (GRC): Comply with ANSI C80.1 and UL 6.

Hot dipped zinc galvanized.

b. 316 Stainless Steel: Exposed Exterior Applications

2. Fittings: Comply with NEMA FB 1 and UL 514B.

a. Material: Match conduit material.

b. Type: Threaded.

3. Joint Compound: Approved, as defined in NFPA 70, by authorities having jurisdiction for use in conduit assemblies, and compounded for use to lubricate and protect threaded conduit joints from corrosion and to enhance their conductivity.

C. Electric Metallic Tube: Comply with ANSI C80.3 and UL 797.

1. Couplings: Setscrew or compression steel.

D. Deflection/Expansion Fittings: Comply with UL 651, rated for environmental conditions where installed, and including flexible internal or external bonding jumper.

2.3 NONMETALLIC CONDUIT AND FITTINGS

A. Manufacturers: Subject to compliance with requirements.

B. Conduit

1. PVC Schedule 80 complying with NEMA TC 2 and UL 651.

2. Fittings: Comply with NEMA TC 3; match to conduit or tubing type and material.

Couplings may be constructed integral to raceway.

C. Solvent cements and adhesive primers shall have a VOC content of 510 and 550 g/L or less, respectively, when calculated according to 40 CFR 59, Subpart D (EPA Method 24).

2.5 BOXES, CABINETS, ENCLOSURES

A. Suitable and listed for the environment in which they are installed per UL 50 and NEMA 250.

1. Indoors: NEMA 250, Type 1.

2. Outdoors: 316 Stainless steel Type 4X. Flanged and gasketed cover.

B. Manufacturers: Subject to compliance with requirements.

C. Sheet Steel Gage (Any Direction)

1. Less than 24”: 14 USS gauge.

2. Greater than 24”: 12 USS gauge.

D. Pull and Junction Boxes

1. Small Sheet: NEMA OS 1.

2. Cast-Metal: Comply with NEMA FB 1 and UL 1773, cast aluminum or galvanized cast iron with gasketed cover.

3. Access Cover as follows, unless otherwise indicated:

a. Screw Cover:

1) Both cover dimensions less than 30 inches

2) In line pulls with one cover dimension less than 16 inches

b. Either cover dimension greater than 30 inches: One or more hinged cover(s) with Latch.

PART 3 – EXECUTION

3.1 GENERAL

A. Comply with NECA 1 and NECA 101 for installation requirements except where requirements on Drawings or in this article are stricter. Comply with NECA 102 for aluminum conduits.

B. Comply with NFPA 70.

3.2 RACEWAY APPLICATION

A. Outdoors: Apply raceway products as specified below unless otherwise indicated:

1. Exposed Conduit: 316 stainless steel. Paint to match existing-

Presidio White, sheen: flat.

2. Concealed Conduit, Aboveground: GRC.

3. Underground Conduit: PVC Schedule 80.

4. Boxes and Enclosures, Aboveground: 316 Stainless Steel Type 4X

B. Indoors

1. Exposed, Not Subject to Physical Damage: EMT.

2. Exposed and Subject to Damage: GRC.

3. Concealed in Ceilings and Interior Walls and Partitions: EMT.

4. Boxes and Enclosures: NEMA 250, Type 1.

C. Raceway Fittings: Compatible with raceways and suitable for use and location.

1. Rigid Steel Conduit: Use threaded rigid steel conduit fittings unless otherwise indicated.

Comply with NEMA FB 2.10.

2. PVC Externally Coated, Rigid Steel Conduits: Use only fittings listed for use with this type of conduit. Patch and seal all joints, nicks, and scrapes in PVC coating after installing conduits and fittings. Use sealant recommended by fitting manufacturer and apply in thickness and number of coats recommended by manufacturer.

3. EMT: Use compression or setscrew fittings. Comply with NEMA FB 2.10. Cast metal fittings are not acceptable

3.3 INSTALLATION

A. Install raceways parallel or perpendicular to structural building lines.

B. Complete raceway installation before starting conductor installation.

C. Anchors and Supports:

1. Positively attach raceways, boxes, and enclosures to structure, do not attach to supports for mechanical or other non-electrical systems.

2. Support raceways within 12 inches (300 mm) of enclosures to which attached.

3. Set boxes, enclosures, and cabinets plumb.

D. Raceway Terminations:

1. Cut conduit perpendicular to the length. For conduits 2-inch (53-mm) trade size and larger, use roll cutter or a guide to make cut straight and perpendicular to the length.

2. Locations Subject to Moisture or Vibration: Use insulating bushings to protect conductors.

3. Terminate threaded conduits into threaded hubs or with locknuts on inside and outside of boxes or cabinets. Install bushings on conduits up to 1-1/4-inch (35mm) trade size and insulated throat metal bushings on 1-1/2-inch (41-mm) trade size and larger conduits terminated with locknuts. Install insulated throat metal grounding bushings on service conduits.

4. Install raceways square to the enclosure and terminate at enclosures with locknuts.

Install locknuts hand tight plus 1/4 turn more.

5. Do not rely on locknuts to penetrate nonconductive coatings on enclosures. Remove coatings in the locknut area prior to assembling conduit to enclosure to assure a continuous ground path.

6. Threaded Conduit Joints, Exposed to Wet, Damp, Corrosive, or Outdoor Conditions:

Apply listed compound to threads of raceway and fittings before making up joints.

Follow compound manufacturer's written instructions.

E. Install pull wires in empty raceways. Use polypropylene or monofilament plastic line with not less than 200-lb (90-kg) tensile strength. Leave at least 12 inches (300 mm) of slack at each end of pull wire. Cap, plug or compressive seal underground raceways designated as spare at point of below grade entry into building or at first pulling access point.

F. Stub-ups:

1. Arrange stub-ups so curved portions of bends are not visible above finished grade.

2. Terminate conduit at threaded GRC coupling with top of coupling 1/8” below top of grade.

3. Elbow shall be PVC Externally Coated, Rigid Steel Conduits.

G. Surface Raceways:

1. Install surface raceways only where indicated.

2. Install surface raceway with a minimum 2-inch (50-mm) radius control at bend points.

3. Secure surface raceway with screws or other anchor-type devices at intervals not exceeding 48 inches (1200 mm) and with no less than two supports per straight raceway section. Support surface raceway according to manufacturer's written instructions. Tape and glue are not acceptable support methods.

3.4 PENETRATIONS

A. Penetrate fire barriers, smoke barriers, vapor barriers, acoustic barriers, waterproofing, roofing materials, floors, walls, foundations, and other rated architectural and structural elements and assemblies in a manner that preserves the integrity of the rating and the intended performance.

1. Install firestopping at penetrations of fire-rated floor and wall assemblies.

3.5 PROTECTION

A. Protect coatings, finishes, and cabinets from damage and deterioration.

1. Repair damage to galvanized finishes with zinc-rich paint recommended by manufacturer.

2. Repair damage to PVC coatings or paint finishes with matching touchup coating recommended by manufacturer.

END OF SECTION 26 05 33

GOGA 325387 IMPORTING SOILS AND FILL MATERIALS 31 23 16.10

SECTION 31 23 16.10 IMPORTING SOILS & FILL MATERIALS

PART 1 – GENERAL

1.1 DESCRIPTION

A. The work of this section consists of requirements and provisions that apply whenever the contractor and NPS determine that an import of soil or fill material is required in order meet these specifications.

1.2 RELATED WORK

A. SECTION 31 23 33 – Utility Excavation & Backfill

B. SECTION 32 11 23 – Aggregate Base Course

PART 2 - PRODUCTS

2.1 IMPORT FILL

A. Import fill material, shall meet, but not be limited to, the following standards:

1. Shall be free of organic matter, trash, concrete rubble and other deleterious material.

2. Shall be uncontaminated by regulated materials.

B. Import fill material shall conform to the following chemical requirements:

Constituent Limit Units

Inorganic Chemical Constituents

Antimony 5 mg/kg

Arsenic 5.4 mg/kg

Barium 320 mg/kg

Beryllium 10 mg/kg

Cadmium 0.8 mg/kg

Chromium 140 mg/kg

Cobalt 21 mg/kg

Copper 49 mg/kg

Cyanide 2,500 mg/kg

Lead 160 mg/kg

Tetraethyl Lead 0.013 mg/kg

Mercury

0.4 mg/kg

Molybdenum 12 mg/kg

Nickel 110 mg/kg

Selenium 0.5 mg/kg

Silver 2 mg/kg

Thallium 1 mg/kg

Vanadium 74 mg/kg

Zinc 60 mg/kg

SemivolatileOrganicCompounds

Acenaphthene 30 mg/kg

Acenaphthylene 30 mg/kg

Anthracene 30 mg/kg

Benzo(a)anthracene 0.46 mg/kg

Benzo(a)pyrene 0.046 mg/kg

Benzo(b)fluoranthene 0.46 mg/kg

Benzo(g,h,i)perylene 30 mg/kg

Benzo(k)fluoranthene 4.6 mg/kg

BenzylAlcohol 1 mg/kg

Chrysene 30 mg/kg

Dibenzo(a,h)anthracene 0.046 mg/kg

Dibenzofuran 2,200 mg/kg

Fluoranthene 30 mg/kg

Fluorene 30 mg/kg

Indeno(1,2,3-cd)pyrene 0.46 mg/kg

2-Methylnaphthalene 30 mg/kg

4-Methylphenol(p-Cresol) 50 mg/kg

Naphthalene 30 mg/kg n-Nitrosodiphenylamine 20 mg/kg

Pentachlorophenol 3 mg/kg

Phenanthrene 30 mg/kg

Phenol 30 mg/kg

Pyrene 30 mg/kg

VolatileOrganicCompounds

Acetone 0.24 mg/kg

2-Butanone(MEK) 3.8 mg/kg

CarbonDisulfide 200 mg/kg

1,4-Dichlorobenzene 0.59 mg/kg p-Isopropyltoluene(p-cymene) 130 mg/kg

MethyleneChloride 0.076 mg/kg

1,2,3-Trichlorobenzene 15 mg/kg

1,2,4-Trichlorobenzene 15 mg/kg

Trichlorofluoromethane 80 mg/kg

1,1,1-Trichloroethane 8 mg/kg

PolychlorinatedBiphenols(PCBs),Pesticides

,andHerbicides

PCBs(Arochlor1254) 0.033 mg/kg

Aldrin 0.0039 mg/kg alpha-BHC 0.062 mg/kg beta-BHC 0.062 mg/kg delta-BHC 0.062 mg/kg

Chlordane 0.009 mg/kg

2,4-D 0.025 mg/kg

Dicamba 0.01 mg/kg

4,4'-DDD 0.049 mg/kg

4,4'-DDE 0.098 mg/kg

4,4'-DDT 0.0082 mg/kg

Dieldrin 0.039 mg/kg

Endosulfan 1.1 mg/kg

Endosulfansulfate 1.1 mg/kg

Endrin 0.004 mg/kg

Endrinaldehyde 0.004 mg/kg

Endrinketone 0.004 mg/kg gamma-BHC(Lindane) 0.01 mg/kg

Heptachlor 0.017 mg/kg

Heptachlorepoxide 0.017 mg/kg

Isodrin 0.0039 mg/kg

MCPP 5 mg/kg

Methoxychlor 0.44 mg/kg

PetroleumHydrocarbonsandConstituents

TPH(asdiesel) 100(a) mg/kg

TPH(asgasoline) 100(a) mg/kg

TPH(asfueloil/motoroil) 100(a) mg/kg

Benzene 0.005(a) mg/kg

Ethylbenzene 0.005(a) mg/kg

Toluene 0.005(a) mg/kg

TotalXylenes 0.005(a) mg/kg

Dioxins/Furans

2,3,7,8-TCDD 8.2E-06 mg/kg

Notes: (a) From California Regional Water Quality Control Board, San Francisco Bay Region Order No. R2-2003-0080

C. All proposed testing of potential import material shall be consistent with testing requirements of

The California Department of Toxic Substances Control, including the DTSC Fact Sheet, Information Advisory, Clean Imported Fill Material, October 2001.

D. The following materials have been previously tested and are accepted by NPS for use under this contract without further chemical testing pursuant to this specification.

Source/Quarry Name Address Pre-approved product

Wheeler Zamaroni 3500 Petaluma Hill Rd.

Santa Rosa, CA 95404

“Organic Compost Approved”

Felton Quarry/Granite

Construction 1800 Felton Quarry Rd.

Felton Ca 95018

AB approved, Drain rock

(3/4” or greater, no fines)

Brisbane Quarry/ Broadmoor Landscape Supply

1350 El Camino Real South San Francisco, CA 94080

DTSC: "Broadmoor Soil" meets requirements for unrestricted use in serpentine, Colma, and beach/dune sand lithologies at

Mark West Quarry/BoDean

4611 Porter Creek Road Santa Rosa, CA 95404

All earth material sizes are approved because fines were tested and approved.

Stony Point Quarry/Soiland

7171 Stony Point Road Cotati, CA 94931

All earth material sizes are approved because fines were tested and approved.

San Rafael Quarry/Dutra

Group 1000 Point San Pedro Road San Rafael, CA 94901

Drain Rock (3/4” or greater, no fines),Rip Rap (no fines)

PART 3 – EXECUTION

A. The Contractor shall ensure that all environmental sampling work is conducted and supervised by individuals and/or a subcontract firm holding the appropriate and applicable technical and professional credentials and/or licenses required by the State of California as necessary.

B. The Contractor shall ensure that any environmental sampling the contractor conducts follows

EPA, California and American Society of Testing and Materials protocols and guidance

C. Chemical testing of proposed impart materials shall be conducted consistent with DTSC Soil

Guidance cited in Section 2.1C.

D. Material Testing

1. A sampling plan will be prepared and submitted to the CO for approval prior to collection and analysis of any samples of proposed import materials for any materials not already listed as preapproved.

E. Payment:

1. Contractor shall be responsible for all costs associated with sampling and approval of non-preapproved sources proposed for use on the project.

END OF SECTION 31 23 16.10

GOGA 325287 RESTORATION OF SURFACES 31 23 33.20

SECTION 33 21 33.20 RESTORATION OF SURFACES

PART 1 - GENERAL

A. The work covered by this Section includes restoration to all types of surfaces disturbed, damaged or destroyed during the performance of the work under or as a result of the operations of the contract.

1.2 RELATED SECTIONS

A. Utility Excavation & Backfill – Section 31 23 33

1.3 SCHEDULE OF RESTORATION

A. A schedule of restoration operations shall be submitted by the Contractor for review.

1. After an accepted schedule has been agreed upon it shall be adhered to unless otherwise revised with the approval of the Contracting Officer.

B. The replacement of surfaces at any time, as scheduled or as directed, shall not relieve the

Contractor of responsibility to repair damages by settlement or other failures.

PART 2 - PRODUCTS - NOT USED.

PART 3 - EXECUTION

A. The quality of materials and the performance of work used in the restoration shall produce a surface or feature equal to or better than the condition of each before the work began.

3.2 TEMPORARY PAVEMENT - NOT USED.

3.3 GRAVEL AREAS

A. All gravel areas disturbed shall be replaced with material to match the existing surface unless otherwise specified.

1. The depth of the soil, stone or gravel shall be at least equal to the existing.

B. After compaction the surface shall conform to the slope and grade of the area being replaced.

GOGA 325287 RESTORATION OF SURFACES 31 23 33.20

3.4 LAWNS AND IMPROVED AREAS

A. All lawn areas disturbed shall be replaced with material to match the existing planted surface unless otherwise specified.

1. The depth of the topsoil shall be at least equal to the existing.

3.5 NATIVE UNDEVELOPED AREAS

A. All native undeveloped areas disturbed shall be replaced with material to match the existing surface unless otherwise specified.

1. The depth of the soil, stone or gravel shall be at least equal to the existing.

B. After compaction the surface shall conform to the slope and grade of the area being replaced.

3.6 OTHER TYPES OF RESTORATION

A. Watercourses shall be reshaped to the original grade and cross-section and all debris removed.

Where required to prevent erosion, the bottom and sides of the watercourse shall be protected.

B. Flow lines indicated on the topographical survey shall not be altered by construction activity. The

Contractor is responsible for reestablishing flow lines that have been affected by construction equipment or personnel under the supervision of the Contractor.

C. Trails and slopes shall be restored to their original condition upon completion of construction activity at a given area. The Contractor must ensure that no new channel flow lines or watercourses have been created as a result of construction activity.

END OF SECTION 33 23 33.20

GOGA 325387 UTILITY EXCAVATION AND BACKFILL 31 23 33

SECTION 31 23 33 UTILITY EXCAVATION & BACKFILL

A. The work of this section consists of trenching and backfilling for the construction and installation of electrical system improvements. The full of the electrical system infrastructure installation shall be open cut.

B. Section Includes: Perform all excavation, shoring, dewatering, backfilling, compaction and grading necessary or required for the construction of the work as covered by these Specifications and indicated on the Drawings. The Park’s preference is for native excavated material to be used as backfill. The excavation shall include, without classification, the removal and disposal of all materials of whatever nature encountered, including water and all other obstructions that would interfere with the proper construction and completion of the required work.

C. Restrictions to Backfill:

1. See Section 01 11 00 – Summary of Work; Subsection 1.4.E Preservation of Natural

Features.

1.2 REFERENCES

A. American Society for Testing and Materials (ASTM).

B. State of California, Department of Transportation, Standard Specifications (Standard

Specifications).

C. State of California, Department of Transportation, Manual of Test (California Test).

1.3 RELATED WORK

A. Section 01 35 13.22 – Archeological Protection

B. Section 01 35 30 – Hazardous Material

1.4 SUBMITTALS

A. As specified in Section 01 33 23.

B. Sheeting and Shoring Plan: Refer to 1.7, “Additional Safety Responsibilities”

C. Written description of barricading, shoring, cribbing, bracing, and sloping precautions.

D. Written procedure for trench dewatering and disposal of fluidized materials removed.

E. Qualifications of Independent Testing Laboratory (if not using pre-approved source)

F. Materials Test Results and Certifications: Submit test results for import materials and certification that material meets these specifications. Tests shall be performed within sixty (60) days of the submission. All material furnished and all work performed shall be subject to rigid inspection, and no material shall be delivered to the site until it has been favorably reviewed by the Contracting Officer or used in the construction work until it has been inspected in the field by the Contracting Officer.

G. Written description of materials proposed for imported backfill shall include the source of proposed materials for review by the COR (in conjunction with the NPS Earth Materials

Managements working group).

1.5 QUALITY ASSURANCE

A. Field Quality Control:

1. The Contracting Officer/COR will:

a. Inspect trench bottoms.

b. Inspect placement of fill.

B. Testing Methods:

1. Three-Point Composite Test for imported fill from non-approved sources:

a All proposed testing shall be consistent with testing requirements of The

California Department of Toxic Substances Control, including the DTSC Fact

Sheet, Information Advisory, Clean Imported Fill Material, October 2001.

1.6 REFERENCE SPECIFICATIONS

A. Whenever the words "Standard Specifications" are referred to, the reference is to the latest edition of the State of California, Department of Transportation, Standard Specifications.

1.7 ADDITIONAL SAFETY RESPONSIBILITIES

A. The Contractor shall select, install and maintain shoring, sheeting, bracing, and sloping as necessary to maintain safe excavations. The Contractor shall be responsible for ensuring such measures: (1) comply fully with 29 CFR Part 1926 OSHA Subpart P Excavations and Trenches requirements, (2) provide necessary support to the sides of excavations, (3) provide safe access to the Engineer’s sampling and testing within the excavation, (4) provide safe access for backfill, compaction, and compaction testing, and (5) otherwise maintain excavations in a safe manner that shall not endanger property, life, health, or the project schedule. All earthwork shall be performed in strict accordance with applicable law, including local ordinances, applicable

OSHA, CalOSHA, California Civil Code, and California Department of Industrial Safety requirements.

B. If any ordinance is found during construction activity, immediately stop construction and notify

Contracting Officer. The construction activities in the area will not begin until the Contracting

Officer notifies the Contractor the site is safe.

1.8 PROJECT CONDITIONS

A. Arrange construction sequences to provide the shortest practical time that the trenches will be open to avoid hazard to the public, and to minimize the possibility of trench collapse.

B. If an unknown utility is encountered during construction that conflicts with the proposed construction, the Contractor shall stop work in this area and notify the COR immediately.

1.9 EXCAVATION CLASSIFICATION

A. Regardless of the nature of material excavated, all excavation will be considered unclassified.

1.10 HAND EXCAVATION

A. Contracting Officer will direct the performance of hand excavation within areas that are considered as sensitive by the NPS including trenches dug within the drip line of trees.

1.11 SOIL CONTAMINATION

A. If the Contractor discovers unnaturally stained or unnaturally odor materials or otherwise suspects contamination, the Contractor shall immediately contact the Contracting Officer and stop work in the area of suspected contamination.

2.1 GENERAL

A. All backfill material shall be approved and certified weed free, before use and be free of cinders, ashes, ice, frozen soil, large hard clods, organic debris, or other deleterious items. Trench excavation materials may be used as approved.

B. All material shall be from a source approved by the COR. All imported material must be free of contaminants. See Specification Section 31 23 16.10 Importing Soils and Fill Materials.

2.2 MATERIALS

A. Coarse Bedding: Class 2, three-fourths (3/4) inch maximum aggregate base, Standard

Specifications Section 26.

B. Bedding Materials:

1. Standard Bedding and Pipe Envelope Sand: Standard Specifications, Paragraph 19-

3.025B

2. Permeable Materials: Standard Specifications, Paragraph 68-1.025 Class I, Type A

3. Pea Gravel: River run, rounded pea gravel with a maximum dimension no larger than one-half (1/2) inch, and with no more than ten (10) percent passing the No. 200 sieve.

The material shall have a durability index of forty (40) or higher)

C. Import Backfill: Imported non-expansive soil with liquid limit no greater than forty (40) percent and a plasticity index no greater than fifteen (15), free from clods or rocks larger than two (2) inches in greatest dimension, and free from organic material.

D. Native Backfill: Native soil prepared as necessary to be free from clods or rocks larger than two

(2) inches in greatest dimension, and free from organic material. All native soil excavated as part of the project but not used as native backfill shall be haul out of the Park to an approved disposal site.

E. Impervious Material: Clay with a minimum percentage of material passing the No. 200 sieve of fifty (50) percent. The material shall be free of organics, rocks, or clods greater than four (4) inches in diameter.

F. Water: The water used shall be reasonably free of objectionable quantities of silt, oil, organic matter, alkali, salts and other impurities. Water quality must be acceptable to the Contracting

Officer.

G. Furnish required bedding, select backfill, and backfill materials listed under the appropriate types of utility line in the sections to which this work relates. See Specification Section 31 23 16.10

Importing Soils and Fill Materials.

2.3 SURFACE FINISH MATERIALS

A. Mulch: Mulch, consisting of seed free wood chippings, shall be used for ground cover where identified by the Re-vegetation Plan and shall be placed three inches (3”) thick. Contractor shall replace the existing six inches (6”) of topsoil prior to laying the mulch.

B. Erosion: All erodable slopes shall be protected during construction as identified on the UPPP. No plastic netting will be allowed for use at the construction site.

C. Sod: The top six inches (6”) of soil/sod shall be reused whenever possible.

2.4 UTILITY LINE MARKING

A. All utilities shall be marked for location and identified by marking tapes, as specified in Section

33 05 26.16.

3.1 EXISTING UTILITIES

A. General: The Contractor shall exercise care in avoiding damage to all utilities as he will be held responsible for their repair if damaged. There is no guarantee that all utilities or obstructions are shown, or that locations indicated are accurate. Utilities are piping, conduits, wire, cable, pull boxes and the like, located at the project site.

B. The Contractor shall pothole the existing water line and other related utilities prior to construction of new electrical system improvements.

C. Shutdowns: Planned utility service shutdowns shall be accomplished during period of minimum use. Such work shall be at no additional cost to the Owner. Program work so that service will be restored in the minimum possible time, and the Contractor shall cooperate with the utility Owner in reducing shutdowns of utility systems to a minimum.

D. Disconnections: No utility shall be disconnected without prior written approval from the utility owner. When it is necessary to disconnect a utility, the Contractor shall give the utility owner not less than seven (7) days’ notice when requesting written approval. The Contractor shall program his work so that service will be restored in the minimum possible time.

E. Overhead Facilities: There are existing overhead electric and telephone transmission lines within the project area. These overhead utilities are not shown on the Drawings. Extreme caution shall be used when working in the vicinity of overhead utilities so as to prevent injury to workmen or damage to the utilities. The Contractor shall be required to comply with the applicable provisions of the California Construction Safety Orders when working anywhere on this project.

F. Existing gas, water, sewer, electrical, and telephone house laterals are not specifically shown on the Drawings but do exist along the conduit routes. Protect all service laterals from damage due to construction operations. If any laterals are damaged, notify the Contracting Officer and the affected utility immediately. The cost of repair shall be borne by the Contractor.

3.2 USA NOTIFICATION & UTILITY FIELD MEETING

A. The Contractor shall contact Underground Service Alert (USA) (1-800-642-2444) seven (7) calendar days prior to start of each ground disturbing phase and shall be responsible for maintaining a valid USA location tag through renewal during the construction. The Contractor shall schedule a utility field meeting prior to any excavation. This shall be so stated in the USA notification. The Contractor shall be responsible to coordinate the utility field meeting at which time he shall explain the limits and impacts to USA member utilities.

B. The majority of the utilities within the Marin Headlands are owned by NPS. As such, very few utilities will actually be marked out by USA. It is the Contractor's responsibility to field locate & mark all utilities within the project work area. Field location and marking shall be performed a minimum of three (3) days prior to ground disturbance; notify COR upon completion of field location and marking for COR review and approval. No trenching shall be performed prior to

COR approval.

C. The Contractor shall expose (pothole) all crossing existing utilities along the trench alignment at locations where electrical conduit lines are to be installed and connected prior to commencement of the work on the project for the conduit line installation. This is to be done in order to determine the line and grade of existing utilities, possible conflicts and mismarks and to avoid conflicts during conduit line installation and determine the realignment of the new conduit if needed prior to trenching and installation.

3.3 GENERAL CONSTRUCTION REQUIREMENTS

A. Site Access: Access to the site will be over public improved roads. Exercise care in the use of such roads and repair at own expense any damage thereto caused by Contractor’s operations.

Such repair shall be to the satisfaction of the owner or agency having jurisdiction over the road.

Take whatever means are necessary to prevent tracking of mud onto existing roads and shall keep roads free of debris.

B. Barriers: Barriers shall be placed at each end of all excavations and at such places along excavations as may be necessary to warn all pedestrian and vehicular traffic of such excavations.

Any trenches left open at the end of the workday must be fully covered prior to the contractor leaving site for the day to protect the public, employees, and wildlife.

C. Access: Free access must be maintained to all fire hydrants, water valves and meters.

D. Open Trench Limitations: The Contracting Officer shall have the authority to limit the amount of trench to be opened or left open at any one time No more than two hundred (200) feet of trench shall be open at any time on any single heading. An open trench shall be defined as any trench which has not been completely backfilled and satisfactorily compacted.

E. Demolition of Pavement: Where trenching or excavation occurs in paved areas, the pavement shall be scored and broken ahead of the trenching or excavation operation. The extent of paving removed shall be limited to the minimum necessary for the excavation.

F. Dust Control: Take proper steps to ensure dust control.

G. Storage of Materials: Excavated materials unsuitable for backfill shall not be stored on existing streets and shall be disposed of immediately. Neatly place excavated materials far enough from the excavation to prevent stability problems. Keep the materials shaped so as to cause the least possible interference with drainage or the normal use of adjacent properties, structures or roadways.

3.4 PREPARATION

A. Contractor shall protect concrete structures (e.g., curbs, sidewalks), existing vegetation, and any other existing structures prior to start of construction.

B. All Lawn Areas: The Contractor shall remove the top six inches (6”) of soil and stockpile separately for use during surface finish work.

3.5 TRENCH EXCAVATION

A. Trenching, General: Excavate the trench to the approximate level of the top of the utility line to be installed, using adequate trench width and side slopes to safely accommodate worker access.

Continue excavating for the utility line, to a width not greater than 12 inches.

1. Rocky Trench Bottom: Where ledge rock, hard pan, boulders, or sharp-edged materials are encountered, over-excavate a minimum depth of six (6) inches below the bottom of the utility exterior wall to permit adequate bedding preparation.

2. Unstable Trench Bottom: Secure approval of depth of over-excavation and stabilization method. For wet trench construction, use approved method of dewatering through diversion, damming and pumping, well points, or underdrain systems.

Dispose of removed fluidized materials as approved. Use coarse bedding material to build a suitable foundation to within six (6) inches of finished utility grade, prior to bedding with the specified material. Compact layers to ninety-five (95) percent of maximum density in not greater than six (6) inch layers. Do not proceed with utility installation until wet trench and unstable conditions are under control.

3. Backfill and compact over excavations to ninety-five (95) percent relative compaction with bedding material. There shall be no additional payment to the Contractor for over excavations not directed by the Contracting Officer. Remove unsatisfactory material encountered below the grades shown as directed by the Contracting Officer and replace with bedding material.

4. Grade trenches so that they are uniformly sloped. Comply with the minimum and maximum trench widths shown on the Drawings. Notify the Contracting Officer if the trench width exceeds the maximum allowable width for any reason.

5. Hand Excavation: Perform hand excavation of trenches dug within two feet of other known utilities.

6. Lawn Areas: Where trenches cross established lawn areas, remove turf with approved sod cutting equipment. Store and maintain the removed sod for later replacement. Cut to the lines shown or as directed.

3.6 SHORING AND SHEETING

A. Construct and maintain all shoring, sheeting, and slope lay-back necessary to protect the excavation, as needed for the safety of the employees and as required by applicable State and

Federal laws.

B. For trenches over 5 feet deep, provide suitable barricades for worker protection. When work area is left open and unattended by Contractor, provide suitable barricades for public safety, regardless of trench depth.

C. For trenches over 4 feet deep, provide suitable exit means in accordance with applicable provisions of OSHA.

3.7 BACKFILLING

A. Compaction:

1. Use vibratory compactors for sand and gravel (non-cohesive soils).

2. Use mechanical tampers for sand and gravel containing a significant portion of fine-grained material, such as silt and clay (cohesive soils).

3. Hand tamp around conduit or cable to protect the lines until adequate cushion is attained.

4. Puddling or water flooding for consolidation of backfill or compaction by wheel rolling with construction equipment will not be permitted.

B. Bedding: Compact the specified material to ninety-five (95) percent of maximum density, at a moisture content determined to be suitable for such density. Compaction shall be to the finished utility grade.

C. Utility Installation: Shape the trench bottom to ensure uniform contact with the full length of the installed line and remove any sharp-edged materials that might damage the line. Compaction shall be maintained beneath the line.

D. Select Backfill: Fill by hand placement around the utility to just over half depth, and compact in a manner to ensure against lateral or vertical displacement. Place select backfill to twelve (12) inches above the utility line by hand placement in not more than six (6) inch layers. Compact each layer to ninety-five (95) percent of maximum density, at a moisture content determined to be suitable for such density.

E. Backfill material shall not be placed over the conduit until after it has been inspected by the

Contracting Officer.

F. It shall be incumbent upon the Contractor to protect the conduit from damage during the construction period. It shall be his responsibility to repair broken or damaged conduit at no extra cost to the Owner. Tamping of backfill over the conduit shall be done with tampers, vibratory rollers and other machines that will not injure or disturb the conduit. Carefully place backfill around and over the conduit and do not allow it to fall directly upon the conduit.

G. Do not allow construction traffic nor highway traffic over the trench until the trench backfill has been brought back even with existing adjacent grade.

H. Add water to the backfill material or dry the material as necessary to obtain the optimum moisture content for the compaction shown on the Drawings or specified. If the Contracting Officer determines that the nature of the ground in which the trench lies precludes compaction of the backfill to the specified density, the backfill shall be compacted to the maximum practicable density. Employ such means as may be necessary to secure uniform moisture content throughout the material of each layer being compacted. After the material has been moisture conditioned, compact it with compaction equipment approved by the Contracting Officer to achieve specified compaction. The Contractor shall be responsible for obtaining the densities specified. Should he fail, through negligence or otherwise, to compact to specified density, or to backfill and compact to surface grade, thus permitting saturation of the backfill material from rains or from any other source, the faulty material shall be removed and replaced with approved material which shall be compacted to the specified density at optimum moisture content, and no additional payment will be made for doing such work or removal and replacement.

I. Compaction by flooding, ponding or jetting will not be permitted.

J. Backfill: Place and compact the specified material as follows:

1. Compact backfill for structures to ninety-five (95) percent relative compaction.

2. Vehicular Traffic Areas: Fill and compact in eight (8) inch maximum layers to ninety-five (95) percent of maximum density, at moisture content determined to be suitable for such density.

3. Pedestrian and Gravel Areas: Fill and compact in eight (8) inch maximum layers to ninety (90) percent of maximum density, at moisture content determined to be suitable for such density.

3.8 SUPPORT OF EXCAVATIONS

A. Adequately support excavation for trenches and structures to meet all applicable requirements in the current rules, orders, and regulations. Excavation shall be adequately shored, braced and sheeted so that the earth will not slide or settle and so that all existing structures and all new conduit and structures will be fully protected from damage. Keep vehicles, equipment, and materials far enough from the excavation to prevent instability.

B. Take all necessary measures to protect excavations and adjacent improvements from running, caving, boiling, settling, or sliding soil resulting from the high groundwater table and the nature of the soil excavated. Attention is directed to Section 832 of the Civil Code of the State of

California relating to lateral and subjacent supports, and wherever structures or improvements adjacent to the excavation may be damaged by such excavation, the Contractor shall comply with this law.

C. The support for…