B08_Section_J_Specifications_Volume_3_of_3.pdf

Volume 3 of 3

Golden Gate National Recreation Area Mill Valley, California

Point Bonita Water System

GOGA

PMIS NO. 2533045

Division 02 - 48

PROJECT SPECIFICATIONS

NATIONAL PARK SERVICE

GOLDEN GATE NATIONAL

RECREATION AREA

August 3, 2021

RFP No. 140P8621R0017 Section J - Attachment No. 004

GOGA – 253304 Table of Contents - 1

TABLE OF CONTENTS

DIVISION 02 – EXISTING CONDITIONS NO. OF PAGES

02 05 10 General Site Construction Requirements 02 41 13.23 Utility Line Removal

DIVISION 03 - CONCRETE

03 30 00 Cast-In-Place Concrete

DIVISION 04 – MASONRY (Section not used)

DIVISION 05 – METALS (Section not used)

DIVISION 06 – WOOD, PLASTICS, & COMPONENTS (Section not used)

DIVISION 07 – THERMAL & MOISTURE PROTECTION (Section not used)

DIVISION 08 – OPENINGS (Section not used)

DIVISION 09 – FINISHES (Section not used)

DIVISION 10 – SPECIALTIES (Section not used)

DIVISION 11 – EQUIPMENT (Section not used)

DIVISION 12 – FURNISHINGS (Section not used)

DIVISION 13 – SPECIAL CONSTRUCTION (Section not used)

DIVISION 14 – CONVEYING EQUIPMENT (Section not used)

DIVISION 21 – FIRE SUPPRESSION (Section not used)

DIVISION 22 - PLUMBING

22 00 00 Plumbing General Requirements

DIVISION 23 HEATING, VENTILATING, AND AIR CONDITIONING (HVAC) (Section not used)

DIVISION 26 – ELECTRICAL (Section not used)

DIVISION 27 – COMMUNICATIONS (Section not used)

DIVISION 28 – ELECTRONIC SAFETY & SECURITY (Section not used)

DIVISION 31 – EARTHWORK

31 05 13.10 Importing Soils and Fill Materials

GOGA – 253304 Table of Contents - 2

31 10 00 Site Clearing 31 22 19 Finish Grading 31 23 33 Trenching and Backfilling 31 23 33.10 Restoration of Surfaces 31 25 00 Soil Erosion and Sedimentation Control

DIVISION 32 – EXTERIOR IMPROVEMENTS

32 11 23 Aggregate Base Course

DIVISION 33 – UTILITIES

33 05 05.31 Hydrostatic Testing 33 14 16 Site Water Utility Distribution Piping 33 14 19 Valves and Hydrants for Water Utility

DIVISION 34 – TRANSPORTATION (Section not used)

DIVISION 35 – WATERWAY & MARINE CONSTRUCTION (Section not used)

DIVISION 40 – PROCESS INTERCONNECTIONS (Section not used)

DIVISION 41 – MATERIAL PROCESSING & HANDLING EQUIPMENT (Section not used

DIVISION 42 – PROCESS HEATING, COOLING, & DRYING EQUIPMENT (Section not used)

DIVISION 43 – GAS HANDLING EQUIPMENT (Section not used)

DIVISION 44 – POLLUTION CONTROL EQUIPMENT (Section not used)

DIVISION 45 – INDUSTRY – SPECIFIC MANUFACTURING EQUIPMENT (Section not used)

DIVISION 46 – WATER AND WASTEWATER EQUIPMENT (Section not used)

DIVISION 48 – ELECTRICAL POWER GENERATION (Section not used)

DIVISION 02

EXISTING CONDITIONS

GOGA – 253304 02 05 10 - 1

GENERAL SITE CONSTRUCTION REQUIREMENTS

SECTION 02 05 10

GENERAL SITE CONSTRUCTION REQUIREMENTS

PART 1 GENERAL

1.1 DESCRIPTION

A. The work of this Section includes the general procedures and requirements for Site Work.

PART 2 PRODUCTS - NOT USED.

PART 3 EXECUTION

3.1 EXAMINATION

A. Site Verification of Conditions

1. Contractor shall perform necessary potholing or locating of underground utilities and services. Perform minor, investigative excavations to verify location of various existing underground facilities at enough locations to assure that no conflict with the proposed work exists and enough clearance is available to avoid damage to existing facilities.

2. Upon discovery of conflicts or problems with existing facilities or construction documents, notify Contracting Officer within twenty-four (24) hours.

3. Existing mapping may be used to approximate locations of existing utilities. Contractor is responsible for determining actual locations of all utilities.

4. Contractor shall obtain all applicable permits and certifications prior to starting work.

3.2 PREPARATION

A. Mobilization / Demobilization

1. The work of this Section consists of transporting all equipment, labor, materials, and any incidental supplies needed to perform the work required in this contract.

2. The work of this Section also consists of transporting from the worksite all equipment, labor, surplus materials, and any incidental supplies used to perform the work required in this contract.

B. Protection

1. Spillage -

a. Avoid spillage by covering and securing loads when hauling on or adjacent to public streets or highways.

b. Remove spillage and sweep, wash, or otherwise clean project, streets, and highways.

2. Dust Control - See Soil Erosion and Sedimentation Control – Section 31 25 00.

3. Sediment and Erosion Control - See Soil Erosion and Sedimentation Control – Section 31 25 00.

4. Existing Plants and Features - Do not damage tops, trunks, and roots of existing trees and shrubs on site which are intended to remain. Do not use heavy equipment within branch

GOGA – 253304 02 05 10 - 2

GENERAL SITE CONSTRUCTION REQUIREMENTS

spread. Interfering branches may be removed only with permission of Project Manager.

Do not damage other plants and features which are to remain.

3.3 REPAIR / RESTORATION - NOT USED.

3.4 FIELD QUALITY CONTROL

A. Notify Project Manager forty-eight (48) hours before performing excavation or fill work.

B. If work has been interrupted by weather, scheduling, or other reason, notify Project Manager twenty-four (24) hours minimum prior to intended resumption of grading or compacting.

C. NPS reserves right to require additional testing to re-affirm suitability of completed work including compacted soils which have been exposed to adverse weather conditions.

END OF SECTION 02 05 10

GOGA – 253304 02 41 13.23 - 1

DEMOLITION AND ABANDONMENT

SECTION 02 41 13.23

UTILITY LINE REMOVAL

PART 1 GENERAL

1.1 DESCRIPTION

A. The work of this Section includes all demolition, removal, salvage and disposal of existing structures, piping, and materials.

1.2 SUBMITTALS

A. Certifications and Testing consistent with Submittals – Section 01 33 00 and including:

1. Permit for transport and disposal of debris.

2. Proposed method of demolition, proposed schedule, sequence of work, and proposed method and schedule for removing, maintaining, and reestablishing facilities and utilities.

1.3 SITE CONDITIONS

A. Protection

1. Erect barriers, fences, guardrails, enclosures, chutes, and shoring to protect personnel, structures, and utilities remaining intact.

2. Protect designated trees and plants from damage.

B. Maintaining Traffic

1. Assure minimum interference with roads, streets, driveways, sidewalks, and adjacent facilities.

C. Utility Lines and Services

1. Keep existing structures to remain and adjacent structures intact and in operation.

2. Obtain permission to disrupt any utilities or services temporarily or permanently.

3. Coordinate with utility company for disconnecting existing service on structures to be demolished.

4. Coordinate with Park for services to be disconnected and schedule with utility company.

Schedule and coordinate with Park and utility company far enough in advance to not delay work.

D. Prior to demolishing a utility or facility, notify the Project Manager three (3) days in advance, and plan the demolition such that the demolition will not create an unsafe condition or interfere with ongoing operations.

E. Where demolition must occur in such a sequence that a portion of this facility must remain operational, coordinate this aspect with the Project Manager.

F. Do not burn waste material. All organic material removed from the construction area must be properly chipped and recycled or removed from the Park and properly disposed.

GOGA – 253304 02 41 13.23 - 2

G. Provide adequate fire protection. Keep area clear of hazardous substances and debris.

H. Maintain access to exits at all time.

I. Provide temporary weather protection to prevent damage to structure and interior area.

J. Explosives are not permitted.

PART 2 PRODUCTS

2.1 BACKFILL MATERIALS

A. Native soils, stone, gravel, or sand, free from debris, frozen materials, and roots and other organic matter may be used for backfilling of demolition areas that are not designated for new construction.

PART 3 EXECUTION

3.1 EXAMINATION

A. Do not commence work until conditions are acceptable to Project Manager

3.2 PREPARATION

A. Arrange for and verify termination of utility services to include capping lines.

B. Remove items scheduled to be salvaged and place in designated storage area.

3.3 DEMOLITION/ABANDONMENT

A. All debris from demolition and abandonment shall be removed off the Park and disposed of in a legal manner. Any material which the Project Manager may wish to save, or reuse shall be stored per the Project Manager direction.

B. General

1. Dampen debris and use temporary enclosures as necessary to control dust.

2. Do not use water to the extent it causes flooding, contaminated runoff, or icing.

3. Break concrete and masonry into sections less than three (3) feet in any dimension and dispose of off-site.

4. Repair damage to adjacent structures.

5. Make neat saw cuts around areas of concrete to be removed, where remaining concrete is to be incorporated into new work.

6. Remove existing exposed piping to the extent shown on the Drawings.

7. Remove buried piping to the extent shown on the Drawings.

8. All equipment to be removed or replaced shall be done so in a safe manner and such that the equipment and any associated piping or wiring is not damaged.

9. All debris from demolition and abandonment shall be removed off the Park and disposed of in a legal manner. Any material which the Project Manager may wish to salvage shall be cleaned and stored per the Project Manager’s direction and requirements of this specification.

GOGA – 253304 02 41 13.23 - 3

3.4 HAZARDOUS MATERIALS

A. If suspected hazardous materials are encountered during demolition of existing facilities, all work is to be terminated immediately and the Project Manager is to be immediately notified.

3.5 DISPOSAL

A. Dispose of unsuitable and excess material off-site. Contractor shall recycle all recyclable demolished materials. Contractor shall submit names and contact information for proposed recyclers to the Project Manager prior to beginning demolition. Only materials not suitable for recycling shall be disposed of in a land fill.

B. Disposal of demolition material shall be in accordance with all EPA, OSHA, and California requirements for materials disposal.

3.6 SALVAGE

A. No materials are planned to be salvaged.

END OF SECTION 02 41 13.23

DIVISION 03

CONCRETE

GOGA – 253304 03 30 00 - 1

CAST-IN-PLACE CONCRETE

SECTION 03 30 00

CAST IN PLACE CONCRETE

PART 1 GENERAL

1.1 DESCRIPTION

A. The work in this Section includes furnishing and installing Project concrete work as described in Contract Documents. Item includes but is not limited to thrust blocking and concrete collars for water valves, as well as concrete required under other sections of the specification.

1.2 REFERENCES

A. American Society for Testing and Materials

1. ASTM C 33-99, 'Standard Specification for Concrete Aggregates'

2. ASTM C 94-98c, 'Standard Specification for Ready-Mixed Concrete'

3. ASTM C 150-98, 'Standard Specification for Portland Cement'

4. ASTM C 260-98, 'Standard Specification for Air-Entraining Admixtures for Concrete'

5. ASTM C 494-98a, 'Standard Specification for Chemical Admixtures for Concrete'

6. ASTM C 618-98, 'Standard Specification for Coal Fly Ash and Raw or Calcined Natural

Pozzolan for Use as a Mineral Admixture in Portland Cement Concrete'

7. ASTM E 1155-96 (2001), ‘Standard Test Method for Determining FF Floor Flatness and

FL Floor Levelness Numbers’

1.3 SYSTEM DESCRIPTION

A. Design Requirements

1. Concrete elements of Project are designed to following values

a. Mix Type 1 – two thousand-five hundred (2500) psi

b. Mix Type 2 – two thousand-five hundred (2500) psi

B. Performance Requirements

1. Conform to requirements of ASTM C 94 unless specified otherwise.

2. For testing purposes, following concrete strengths are required -

a. At seven (7) days - sixty (60) percent minimum of twenty-eight (28) day strengths

b. At twenty-eight (28) days -

1) Mix Type 1 - three thousand (3000) psi

2) Mix Type 2 - four thousand-five hundred (4500) psi

1.4 SUBMITTALS

A. Quality Assurance / Control

1. Concrete mix design.

GOGA – 253304 03 30 00 - 2

2. Delivery Tickets - Require mix plant to furnish delivery ticket for each batch of concrete.

Keep delivery tickets at job-site for use by Owner or his representatives. Tickets shall show following -

a. Name of ready-mix batch plant

b. Serial number of tickets

c. Date and truck number

d. Name of Contractor

e. Name and location of Project

f. Specific class or designation of concrete in conformance with that employed in

Project specification

g. Amount of concrete

h. Time loaded

i. Type, name and amount of admixtures used

j. Amount and type of cement

k. Total water content

l. Sizes and weights of sand and aggregate

1.5 PROJECT CONDITIONS

A. Project Environmental Requirements

1. Cold Weather Concreting Procedures -

a. No frozen materials shall be used.

b. Forms, reinforcement, and fillers shall be free from frost. Place no concrete on frozen ground.

c. For temperatures below forty (40) degrees F, maintain concrete at between sixty (60) and eighty (80) degrees F when placing, and fifty (50) degrees F minimum for five

(5) days if regular concrete, or at fifty (50) degrees F for three (3) days if high early strength concrete, or longer if determined necessary by the Project Manager.

d. Housing, covering, or other protection shall remain in place for twenty-four (24) hours after heat is discontinued.

2. Hot Weather Concreting Procedures -

a. Maximum concrete temperature allowed is ninety (90) degrees F in hot weather.

b. Cool aggregate and subgrades by sprinkling.

c. Avoid cement over one hundred forty (140) degrees F

d. Use cold mixing water or ice.

e. Use fog spray or evaporation retardant to lessen rapid evaporation from concrete surface.

PART 2 PRODUCTS

2.1 MATERIALS

A. Portland Cement - Meet requirements of ASTM C 150, Type II.

B. Aggregates

1. Coarse -

a. Meet requirements of ASTM C 33 or nonconforming aggregate which by test or actual service produces concrete of required strength and conforms to local governing codes.

GOGA – 253304 03 30 00 - 3

b. Aggregate shall be uniformly graded as follows -

1) Flat Work - Size No. 67

Sieve Size Percent Passing

1 inch 100

3/4 inch 90 - 100

3/8 inch 20 - 55

No. 4 0 - 10

No. 8 0 - 5

2) All Other - Size No. 57

Sieve Size Percent Passing

1-1/2 inch 100

1 inch 95 - 100

1/2 inch 25 - 60

No. 4 0 - 10

No. 8 0 - 5

2. Fine - Meet requirements of ASTM C 33.

Sieve Size Percent Passing

3/8 inch 100

No. 4 95 - 100

No. 8 80 - 100

No. 16 50 - 85

No. 30 25 - 60

No. 50 10 - 30

No. 100 2 - 10

C. Water - Clear, apparently clean, and potable.

D. Admixtures and Miscellaneous

1. Mineral -

GOGA – 253304 03 30 00 - 4

a. Fly Ash Pozzolan - Meet requirements of ASTM C 618, Class F or C and with loss on ignition (LOI) of three (3) percent maximum.

2. Chemical -

a. No admixture shall contain calcium chloride nor shall calcium chloride be used as an admixture. All chemical admixtures used shall be from same manufacturer and compatible with each other.

b. Air Entraining Admixture -

1) Meet requirements of ASTM C 260.

2) Approved Products -

a) Air Mix 200 or AEA-92 by Euclid

b) Air plus or Super Air Plus by Fritz-Pak

c) MB-VR or MB-AE by Master Builders

d) Sika Air by Sika

e) Daravair or Darex II AEA by W R Grace.

c. Water Reducing Admixture -

1) Meet requirements of C 494, Type A and containing not more than 0.05 percent chloride ions.

2) Approved Products -

a) Eucon WR 75 or Eucon 91 by Euclid

b) FR-2 or FR-3 by Fritz-Pak

c) Pozzolith Normal by Master Builders

d) Plastocrete 160 by Sika

e) Daracem 50/55, WRDA-64, or WRDA-82 by W R Grace.

d. Water Reducing, Retarding Admixture -

1) Meet requirements of ASTM C 494, Type D and contain not more than 0.05 percent chloride ions.

2) Approved Products -

a) Eucon Retarder 75 by Euclid

b) FR-1 or Modified FR-1 by Fritz-Pak

c) Pozzolith Retarder by Master Builders

d) Plastiment by Sika

e) Daratard-17 or Daratard-40 by W R Grace.

e. High Range Water Reducing Admixture (Superplasticizer) -

1) Meet requirements of ASTM C 494, Type F or G and containing not more than

0.05 percent chloride ions.

2) Approved Products -

a) Eucon 37 or Eucon 537 by Euclid

b) Supercizer 1 through 7 by Fritz-Pak

c) Rheobuild 1000 by Master Builders

d) Sikament 300 by Sika

e) Darachem-100 or WRDA-19 by W R Grace.

f. Non-Chloride, Non-Corrosive Accelerating Admixture -

1) Meet requirements of ASTM C 494, Type C or E and not contain more chloride ions than are present in municipal drinking water.

2) Approved Products -

a) Accelguard 80 by Euclid

GOGA – 253304 03 30 00 - 5

b) Daraset or Polarset by W R Grace.

3. Evaporation Retardant -

a. Approved Products -

1) Sure Film J-74 by Dayton Superior

2) Euco-Bar by Euclid Chemical Co

3) E-Con by L & M Construction Chemicals

4) Confilm by Master Builders

4. Bonding Agents -

a. Approved Products -

1) Day Chem Ad Bond (J-40) by Dayton Superior

2) Flex-Con by Euclid Chemical Co

3) Larsen Weldcrete by Larsen Products Corp

4) Everbond by L & M Construction Chemicals

5) Acryl Set by Master Builders

6) Sonocrete by Sonneborn

7) Tamms Bond by TAMMS Industries

8) Acrylic Additive by W R Bonsal

9) Intralok by W R Meadows

2.2 MIXES

A. Submit mix designs to meet following requirements

1. Proportions -

a. Mix Type 1 -

1) Minimum weight cement per cubic yard concrete - five hundred-seventeen (517) pounds

2) Air Entrainment – three (3) percent, plus or minus one and one half (1 ½) percent

3) Water / Cement Ratio – 0.50 maximum by weight

b. Mix Type 2 -

1) Minimum weight cement per cubic yard concrete - five hundred sixty-four (564) pounds

2) Air Entrainment -

a) Exterior Concrete - six (6) percent, plus or minus one and one half (1 ½) percent

b) Interior – three (3) percent, plus or minus one and one half (1 ½) percent

3) Water / Cement Ratio – 0.45 maximum by weight

c. Do not add water any time during mixing cycle above amount required to meet specified water / cement ratio. No reduction in the amount of cementitious material is allowed.

2. Admixtures -

a. Mix design shall show proposed admixture, amount, usage instructions, and justification for proposed use. Do not use any admixture without the Project Manager's written approval.

b. Mineral - An amount of specified fly ash not to exceed twenty (20) percent of weight of cement may be substituted for cement. If substituted, consider fly ash with cement in determining amount of water necessary to provide specified water / cement ratio.

GOGA – 253304 03 30 00 - 6

c. Chemical -

1) Four (4) inch slump maximum before addition of high range water reducer.

2) Eight (8) inch slump maximum with use of high range water reducer.

3) Specified accelerator or retarder may be used if necessary, to meet environmental conditions.

PART 3 EXECUTION

3.1 PREPARATION

A. Remove water and debris from space to be placed.

3.2 INSTALLATION

A. Site Tolerances

1. ACI Standards shall govern concrete work except where specified differently.

B. Concrete Types

1. Use specified concrete mix types in following Project elements. If Project elements specified to use Mix Type 1 will be exposed to weather through a winter freeze / thaw season during construction period, use Mix Type 2 for those Project elements.

a. Mix Type 1-

1) Thrust bocks

b. Mix Type 2 -

2) Exterior concrete

C. Placing

1. Place as soon after mixing as possible. Deposit as nearly as possible in final position.

Placing of concrete shall be continuous until a panel or section is complete.

2. Compact concrete in forms by vibrating and other means where required. Thoroughly work in concrete around reinforcing bars.

3. Do not embed aluminum in concrete.

4. Do not use contaminated, deteriorated, or re-tempered concrete.

5. Avoid accumulation of hardened concrete.

D. Finishing

1. Broom Finishes, Exterior Flatwork Not Specified in Cast-In-Place Concrete Site

Elements – Section 02776.

a. Broom finish exterior concrete.

b. Round edges including edges formed by expansion joints.

c. Remove edger marks.

E. Curing - Keep concrete moist seven days minimum for regular concrete and three (3) days for high early strength. Do not use concrete curing compounds without the Project Manager's written approval. Do not use curing compounds to replace moist curing unless accepted in writing by the Project Manager.

GOGA – 253304 03 30 00 - 7

3.3 FIELD QUALITY CONTROL - NOT USED.

3.4 ADJUSTING - NOT USED.

3.5 PROTECTION

A. Protect concrete which has not received its initial set from precipitation to avoid excess water in mix and unsatisfactory surface finish.

END OF SECTION 03 30 00

DIVISION 22

PLUMBING

GOGA – 253304 22 00 00 - 1

SITE CLEARING

SECTION 22 00 00

PLUMBING GENERAL REQUIREMENTS

PART 1 - GENERAL

1.1 SUMMARY

A. All Plumbing work shall be performed by, or under the direct supervision of a plumber licensed in the state of California.

1.2 RELATED SECTIONS

A. Sections that involve plumbing under Division 33 – UTILITIES shall meet the requirements of Section 22 00 00.

END OF SECTION 22 00 00

DIVISION 31

EARTHWORK

GOGA – 253304 31 05 13.10 - 1

IMPORTING SOILS AND FILL MATERIALS

SECTION 31 05 13.10

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 – Trenching and Backfilling

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

GOGA – 253304 31 05 13.10 - 2

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

GOGA – 253304 31 05 13.10 - 3

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. See Division 01 specifications for materials that have been previously tested and accepted by

NPS for use under this contract without further chemical testing pursuant to this specification:

PART 3 – EXECUTION

3.1 GENERAL

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

GOGA – 253304 31 05 13.10 - 4

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 pre-approved.

END OF SECTION 31 05 13.10

GOGA – 253304 31 10 00 - 1

SECTION 31 10 00

PART 1 GENERAL

1.1 DESCRIPTION

A. The work of this Section includes cleaning and grubbing, topsoil removal, and storage.

1.2 SUBMITTALS

A. Certifications and Testing consistent with Submittals – Section 01 33 00.

PART 2 PRODUCTS NOT USED.

3.1 PREPARATION

A. Protection

1. Provide barricades, coverings, and other protection necessary to prevent damage to existing improvements.

2. Protect improvements on adjoining properties as well as those on Park property.

3. Protect existing trees.

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

b. Avoid foot or vehicular traffic of Parking of vehicles within drip line.

c. Provide temporary protection as required to prevent damage to trees.

d. Do not remove, injure, or destroy trees or other plants without prior approval from

Project Manager.

e. Provide protection for roots over one and one half (1 ½) inches in diameter that are cut during construction operations.

4. Coat cut faces with an emulsified asphalt, or other acceptable coating especially formulated for horticultural use on curt or damaged plant tissues.

5. Temporarily cover all exposed roots with wet burlap to prevent roots from drying out.

6. Provide earth cover as soon as possible.

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

a. Repair to be performed by a qualified arborist.

b. Remove trees which cannot be repaired.

c. Replace with new trees of minimum four (4) inches caliper.

8. Repairs or replacements are to be completed in a manner acceptable to Project Manager at no additional expense to Government.

B. Clearing and Grubbing

1. Do not begin earthmoving work until all stormwater permits have been obtained.

2. Do not clear and grub without prior approval from Project Manager.

3. Clear from surface of existing ground all trees and shrubs marked for removal, brush, downed timber, rotten wood, heavy growth of grass and weeds, vines, rubbish and debris.

GOGA – 253304 31 10 00 - 2

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

a. In cut areas, totally grub.

b. In fill areas, where fill is less than three (3) feet totally grub ground.

c. Fill depressions caused by clearing and grubbing operations with satisfactory soil material, unless further excavation or earthwork is indicated. Place fill material in horizontal layers not exceeding six (6) inches loose depth, and thoroughly compact to a density equal to adjacent original ground.

d. Where fill is three (3) feet or more in depth, stumps may be left no higher than six

(6) inches above existing ground surface.

C. Tree trimming

1. Utilize the services of a professional qualified arborist.

2. Only trim branches, trees and shrubs marked for trimming by Project Manager.

Coordinate with Park prior to performing any trimming operations. Make effort to minimize amount of trimming required.

D. Topsoil

1. Carefully strip native topsoil to whatever depths encountered, in manner to prevent intermingling with underlying subsoil or objectionable material.

2. Remove heavy growths of grass before stripping.

a. Where trees are indicated to be left standing, stop topsoil stripping sufficient distance from such trees to prevent damage to main root system.

b. Topsoil is defined as organic surface soil reasonably free of subsoil, clay lumps, stones and other objects two (2) inches in diameter, and without weeds, roots and other objectionable material.

3. Stockpile topsoil where directed by Project Manager for later use as final backfill.

a. Construct storage piles to freely drain surface water.

b. Cover storage piles to prevent erosion.

c. Cover all storage piles with plastic to prevent growth of weeds.

E. Disposal of waste materials

1. Burning materials on-site is prohibited.

2. Remove all waste materials from site.

END OF SECTION 31 10 00

GOGA – 253304 31 22 19 - 1

FINISH GRADING

SECTION 31 22 19

FINISH GRADING

PART 1 GENERAL

1.1 DESCRIPTION

A. Work covered by this Section includes the finish grading required to prepare site for installation of landscaping as described in Contract Documents.

B. Related Sections

1. General Site Construction Requirements – Section 02 05 10

2. Site Clearing – Section 31 10 00

1.2 REFERENCES

A. American Society for Testing and Materials

1. ASTM 1557-91, ‘Standard Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort’

2. ASTM D 422, ‘Method for Particle-Size Analysis of Soils’

1.3 SUBMITTALS

A. Quality Control / Assurance

1. Test Results – Gradation, Compaction

PART 2 PRODUCTS

2.1 MATERIALS

A. Imported Topsoil

1. Fertile, loose, friable soil meeting following criteria -

a. Chemical Characteristics -

1) Acidity / alkalinity range - pH 5.5 to 7.7

2) Soluble Salts - less than 2.0 mmhos/cm

3) Sodium Absorption Ratio (SAR) - less than 3.0

4) Organic Matter - greater than one percent

b. Physical Characteristics -

1) Gradation as defined by USDA triangle of physical characteristics as measured by hydrometer.

Sand - fifteen (15) to sixty (60) percent Silt - ten (10) to sixty (60) percent Clay - five (5) to thirty (30) percent

2) Clean and free from toxic minerals and chemicals, noxious weeds, rocks larger than one and one half (1½) inch in any dimension, and other objectionable materials.

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FINISH GRADING

3) Soil shall not contain more than two (2) percent of particles measuring over one sixteenth (1/16) inch in largest size.

3.1 EXAMINATION

A. Do not commence work of this Section until specifications for trenching and backfilling are met.

3.2 PREPARATION

A. Protection - Protect utilities and site elements from damage.

B. Surface Preparation

1. Before grading, dig out weeds from planting areas by their roots and remove from site.

Before placing topsoil in landscape areas, remove foreign matter such as building rubble, wire, cans, sticks, concrete, etc.

2. Before placing topsoil, remove imported paving base material present in planting areas down to natural subgrade or other material acceptable to Project Manager.

3. Disk, till, or aerate with approved agricultural aerator to depth of six (6) inches.

3.3 PERFORMANCE

A. Site Tolerances

1. Total Topsoil Depth -

a. Lawn Areas – six (6) inches minimum

b. Shrub Planting Areas – eighteen (18) inches minimum throughout entire shrub bed area.

2. Elevation of topsoil relative to walks or curbs as indicated in the approved plan set or if not indicated fill topsoil as follows -

a. Seeded Lawn Areas - one (1) inch below

b. Shrub Areas - three (3) inches below

B. Do not expose or damage existing shrub or tree roots.

C. Redistribute approved existing topsoil stored on site as a result of work of Site Clearing –

Section 02110. Remove organic material, and other objectionable materials. Provide additional approved imported topsoil required to bring surface to specified elevation relative to concrete site element.

D. Where topsoil depth is nine (9) inches or greater, place topsoil in layers not to exceed nine

(9) inches and, to prevent settling, compact to eighty-five (85) percent relative density in accordance with ASTM D 1557. Do not place topsoil whose moisture content makes it prone to compaction during placement process.

END OF SECTION 31 22 19

GOGA – 253304 31 23 33 - 1

TRENCHING AND BACKFILLING

SECTION 31 23 33

TRENCHING AND BACKFILLING

PART 1 - GENERAL

1.1 DESCRIPTION

A. The work of this section consists of trenching and backfilling for the construction and installation of the water supply line replacement.

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. 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.

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. See Division 01 Specifications.

B. Section 31 23 33 – Utility Excavation & Backfill

1.4 SUBMITTALS

A. As specified in Division 01 specifications.

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

F. Qualifications of Independent Field-Testing Service

G. 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

GOGA – 253304 31 23 33 - 2

by the Contracting Officer, or used in the construction work until it has been inspected in the field by the Contracting Officer.

H. Field Testing Report: Submit field testing report for materials used in the construction work.

Independent Field-Testing Service will certify the placement of materials meets the requirements of this specification.

I. 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. Source Quality Control: Certify import materials proposed for use conform to the specified requirements of this Section. Working with the Contracting Officer, field test material placement to determine conformance the specified requirements of this Section. Tests shall be performed by an independent testing laboratory. The Contractor shall be responsible for hiring an independent testing laboratory.

B. Field Quality Control:

1. The Contracting Officer will:

a. Inspect foundations, site grading and borrow operations.

b. Inspect placement of fill.

2. The Contractor shall provide independent testing for field quality control as required by this specification. Working with the Contracting Officer, field test material placement to determine conformance the specified requirements of this Section. The Contractor shall excavate holes for in-place soil sampling. The Contractor shall be responsible for hiring an independent field-testing service. Contractor shall be responsible for costs of additional inspection and re-testing resulting from non-compliance.

C. Testing Methods:

1. Durability Index: Manual of Test, State of California, Department of Transportation.

2. Specific Gravity: ASTM D854.

3. Laboratory Compaction: ASTM D1557, Method A or C.

4. In-Place Density: ASTM D1556 or ASTM D2922.

5. Particle Size Analysis of Soils: ASTM D422.

6. Plastic Limit and Plasticity Index: ASTM D4318.

7. Soil Classification: ASTM D2487.

8. In-Place Moisture Content: ASTM D3017.

D. Definition:

E. Relative Compaction: In-place dry density divided by the maximum dry density laboratory compaction express as a percentage.

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.

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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. Obtain all required permits and licenses before installing utilities under existing roads, other than Park Service roads, and follow the rules and requirements of the authority having jurisdiction.

B. 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.

C. 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. (See Division 01 Specifications).

1.12 GROUNDWATER

A. Encountering groundwater can be expected during construction activities. Depth to ground water is not known.

PART 2 - PRODUCTS

1.1 GENERAL

GOGA – 253304 31 23 33 - 4

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.

1.2 MATERIALS

A. Coarse Bedding: Class 2, three-fourths (3/4) inch maximum aggregate base, Caltrans Standard Specifications Section 26.

B. Bedding Materials:

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

19-3.025B.

2. Permeable Material: Caltrans 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.

1.3 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 top soil prior to laying the mulch. Mulch may be obtained through the Conservancy Nursery, if available.

GOGA – 253304 31 23 33 - 5

B. Erosion: All slopes shall be protected during construction as identified on the plans. 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.

1.4 UTILITY LINE MARKING

A. All utilities shall be marked for location and identified by marking tapes, as specified in Section 33 14 16.

PART 3 - EXECUTION

3.1 CONTROL OF WATER

A. Groundwater Influence:

1. If shallow groundwater and saturated soil conditions are encountered at the site, dewatering or underwater construction technique may be required for construction.

2. If dewatering is required, a dewatering procedure shall be submitted for approval by the

Contracting Officer.

3. In addition to the groundwater level, if earthwork is performed during or soon after periods of precipitation, the sub-grade soils may become saturated, "pump," or not respond to densification techniques. Typical remedial measures include: disking and aerating the soil during dry weather; mixing the soil with dryer materials; removing and replacing the soil with an approved fill material; or mixing the soil with an approved lime or cement product.

4. The over-excavation bottom or trench bottom may require additional treatment to stabilize the sub-grade soil prior to backfilling. Soft and saturated sub-grade soil may be mitigated with a layer of geogrid reinforcement fabric consisting of Tensar® BX 1100 Geogrid (or approved equal) and overlain by twelve (12) to twenty-four (24) inches of compacted aggregate base.

B. The Contractor shall be responsible for furnishing temporary drainage facilities to convey and dispose of surface water falling on or passing over the site.

3.2 EXISTING UTILITIES

A. General: The Contractor is responsible for locating existing utilities in the work area. The Contractor shall exercise care in avoiding damage to all utilities and will be held responsible for their repair if damaged.

B. Shutdowns: Planned utility service shutdowns shall be accomplished during period of minimum use. In some cases this may require night or weekend work. Such work shall be at no additional cost to the Government. 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.

C. 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.

GOGA – 253304 31 23 33 - 6

D. Overhead Facilities: There are existing overhead electric and telephone transmission lines within the project area. 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.

E. Existing gas, water, sewer, electrical, and telephone improvements may exist along the pipeline 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 at no additional cost to the government.

3.3 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 Point Bonita 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.

3.4 GENERAL CONSTRUCTION REQUIREMENTS

A. Site Access: Access to the site will be over public improved and unimproved 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 Government or agency having jurisdiction over the road. Take whatever means are necessary to prevent tracking of mud onto existing roads and Contractor shall keep roads free of debris.

B. Traffic Regulation: Provide such flagmen, patrols, pilot cars, drivers, lighted barricades, flares, lights, warning signs, and safety devices as may be required for control of traffic adjacent to all areas of work.

C. 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. Lights shall also be placed along excavations from sunset each day to sunrise of the next day until such excavation is entirely restored.

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

E. 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. In public roads, excavation and pipe laying shall be coordinated to the end that a minimum of interference with public traffic will result.

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.

GOGA – 253304 31 23 33 - 7

F. 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.

G. Dust Control: Take proper and efficient steps to control dust.

H. 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 to cause the least possible interference with drainage or the normal use of adjacent properties, structures or roadways.

3.5 PREPARATION

A. Contractor shall protect concrete structures (i.e. 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.

3.6 FIELD QUALITY CONTROL

A. Testing required to determine compliance for the work of this section will be the responsibility of the Contractor, at no additional expense to the Government.

B. ASTM D698-91 shall be used to determine maximum density and ASTM D1556-90 or ASTM

D2922-96 shall be used to determine in-place density.

C. The Contractor shall perform at least one test within each backfill material zone as described in the standard specifications at the following maximum intervals. Testing at more frequent intervals may be required at the discretion of the Contracting Officer:

1. Vehicular Traffic Areas: Fifty (50) linear feet of trench.

2. Pedestrian and Gravel Areas: One hundred (100) linear feet of trench.

3. Non-traffic Areas: Two hundred (200) linear feet of trench.

3.7 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…