Attachment_B_Project_Specifications-_Division_2.pdf

VOLUME 2 OF 2

JOHN DAY FOSSIL BEDS

NATIONAL MONUMENT, OREGON

JODA PMIS No. 213419

REHABILITATE CANT RANCH AND TELENET

BUILDING SEPTIC SYSTEM

PROJECT MANUAL

Division 2 - 49 – Technical Specifications

NATIONAL PARK SERVICE

INTERIOR REGIONS 8, 9, 10, & 12

NOVEMBER 2020

JODA – 213419 TABLE OF CONTENTS - 1

VOLUME 2 OF 2

TABLE OF CONTENTS

DIVISION, SECTION & PARAGRAPH NUMBERING

Numbering and lettering of sections and paragraphs in this Project Manual are merely for identification.

Sections included are listed in this Table of Contents together with the number of pages in each section.

The Contractor shall check their copies of the Project Manual against this Table of Contents and confirm there are no missing pages or sections.

Number Title No. of Pages

00 00 20 Table of Contents

DIVISION 02 – EXISTING CONDITIONS

02 05 00 General Site Construction Requirements

02 41 19 Selective Demolition

DIVISION 03 – CONCRETE

03 40 00 Precast Concrete Items

DIVISION 05 – METALS (Section Not Used)

DIVISION 06 – WOOD, PLASTICS, AND COMPOSITES (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

JODA – 213419 TABLE OF CONTENTS - 2

DIVISION 23 HEATING, VENTILATING, & AIR CONDITIONING (HVAC) (Section Not Used)

DIVISION 25 INTEGRATED AUTOMATION (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 10 00 Site Clearing

31 22 19 Finish Grading

31 23 00 Excavation & Backfill

31 23 33.20 Restoration of Surfaces

31 25 00 Erosion & Sediment Control

DIVISION 32 – EXTERIOR IMPROVEMENTS (Section Not Used)

DIVISION 33 – UTILITIES

33 00 00 Pipe & Pipe Fittings: General Statement

33 05 26 Markers for Utility Identification

33 34 13.13 Precast Concrete Septic Tanks

33 34 51 Drainage Field System

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 – PROCESS 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

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GENERAL SITE CONSTRUCTION REQUIREMENTS

SECTION 02 05 00

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. The contractor shall perform necessary potholing or locating of underground utilities and services. Perform minor, investigative excavations to verify the location of various existing underground facilities at sufficient locations to assure that no conflict with the proposed work exists and sufficient 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. The existing mapping may be used to approximate locations of existing utilities. The contractor is responsible for determining the actual locations of all utilities.

3.2 PREPARATION

A. 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 Division 01 Section 01 57 23 “Stormwater Pollution Prevention.”

3. Sediment & Erosion Control: See Division 01 Section 01 57 23 “Stormwater Pollution

Prevention.”

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

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3.3 REPAIR / RESTORATION - NOT USED.

3.4 FIELD QUALITY CONTROL

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

B. If work has been interrupted by weather, scheduling, or other reason, notify Contracting Officer twenty-four (24) hours minimum before the intended resumption of grading or compacting.

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

END OF SECTION

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SELECTIVE DEMOLITION

SECTION 02 41 19

A. The work of this section consists of removal and disposal of existing items including septic tanks and associated internal components, valves, sewer lines, sewer cleanouts; and the selective demolition and removal of concrete.

1.2 RELATED WORK

A. Section 01 50 00 – Temporary Facilities & Controls

B. Section 31 23 00 – Excavation & Backfill

1.3 SUBMITTALS

A. As specified in Section 01 33 23.

B. Submit schedule showing sequence of work and methods of demolition and relocation.

Include a schedule for isolating, shutting off and capping utilities and re-establishing utility services.

1.4 QUALITY ASSURANCE

A. Comply with safety requirements for demolition, ANSI A10 Series.

B. Comply with Oregon Administrative Rules Section 340-071-0185 for the decommissioning of the septic tank.

1.5 PROJECT CONDITIONS

A. Take all necessary measures to control dust during demolition.

B. Ensure the safety of persons in the demolition area. Provide temporary barricades as required.

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

D. Hazardous Materials: Hazardous materials may be present in buildings and structures, such as solvents, oils, and greases. Demolition shall be conducted per Contracting Officer direction.

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E. Storage or sale of removed items or materials on-site is not permitted.

F. Maintain existing utilities indicated to remain in service and protect them against damage during selective demolition operations.

1.6 SCHEDULING

A. Complete demolition that might damage new construction before starting new work.

PART 2 – PRODUCTS (Not Used)

A. Verify that utilities have been disconnected, isolated and capped before starting selective demolition operations.

B. Contracting Officer does not guarantee that existing conditions are the same as those indicated in record documents.

C. Survey existing conditions and correlate with requirements indicated to determine the extent of selective demolition required.

A. Provide temporary supports and protection for a portion of the structure to remain. Protect fixtures and equipment to remain. Protect nearby structures and vegetation as necessary.

B. The contractor shall saw-cut the edges of all pavement, walkway, gutters and concrete curb sections that are to be removed. The saw cut line shall be straight and smooth to allow for a clean line of repair.

C. Water and wastewater lines (including stormwater) abandoned in place shall be capped.

D. Cap or disconnect utilities. Provide bypass connections as necessary to maintain utility service to occupied areas. Abandon utilities in place that are no longer required in areas not disturbed by construction.

E. Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

F. Protect to ensure the safe passage of people around the selective demolition area and to and from occupied portions of the building.

G. Provide and maintain shoring, bracing, and structural supports as required to preserve stability and prevent movement, settlement, or collapse of construction and finishes to remain

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and to prevent unexpected or uncontrolled movement or collapse of construction being demolished.

3.3 DEMOLITION

A. Concrete shall be demolished in small sections. Using a power-driven saw, cut concrete to a depth of at least three-fourths (3/4) inch at junctures with construction to remain. Dislodge concrete from reinforcement at the perimeter of areas being demolished, cut reinforcement, and then remove the remainder of concrete.

3.4 SALVAGE

A. The brick within the Brick Sidewalk will need to be carefully removed, preserved, salvaged and replaced to match existing conditions. Carefully clean and store items to be salvaged or reused.

B. Storage Area: As directed by the Contracting Officer.

3.5 DISPOSAL OF DEMOLISHED MATERIALS

A. Except for items and materials indicated to be salvaged, remove all demolished materials from the project site.

B. Do not allow demolished materials to accumulate on-site.

C. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

3.6 RESTORATION AND CLEAN-UP

A. Repair and clean adjacent surfaces damaged or soiled by demolition work.

B. Restore Brick Sidewalk to existing condition, prior to construction.

C. Utility service to normal operation.

D. Remove equipment, temporary protection and barriers, and debris. Dispose of unsalvageable material as specified in Section 01 50 00 “Temporary Facilities & Controls.”

DIVISION 3

CONCRETE

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PRECAST CONCRETE ITEMS

SECTION 03 40 00

A. Precast concrete structures: manholes, septic tanks, and vaults as detailed on plans.

1.2 STANDARDS

A. See the standards listed in related sections – Section 33 34 13.13 “Precast Concrete Septic

Tanks.”

A. For concrete items detailed in plans:

1. Shop drawings showing all dimensions, all standard views and major cross-section views, and placement of all reinforcement (including ties and stirrups) and embedded items.

2. Structural calculations for all precast or cast in place elements and items with

“Professional Engineer’s” or “Structural Engineer’s” seal and signature with current licensure to practice civil or structural engineering in the state of Oregon. Anti-buoyancy calculations, assuming groundwater at surface level, shall be included with all precast or cast in place concrete item submittals demonstrating that anti-buoyancy measures have been satisfied.

3. Placement drawings, showing lifting inserts, weight, and center of gravity, and lifting method requirements.

4. For sites with access restrictions by obstacles or property boundaries, approach plan showing positions of transporting truck and lifting implement to effect placement.

5. Non-shrink grout manufacturer’s product data and installation. Include manufacturer’s

Material Safety Data Sheets.

PART 2 - PRODUCTS

2.1 PRECAST SEPTIC TANK

A. All precast concrete tanks are to be designed by Professional Civil & Structural Engineers licensed in the State of Oregon and on the Oregon Department of Environmental Quality

(ODEQ) approved septic tank list.

B. Each tank must be manufactured in compliance with the ODEQ's rules, and with the plans and design specifications provided to ODEQ. Any deviations from the plans and specifications are not permitted unless authorized in writing by the ODEQ.

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2.2 PREAPPROVED MANUFACTURER

A. Preapproved manufacturer of precast concrete structures: septic tanks:

1. Floyd & Sons Precast Products

3901 NW Elliot Lane

Prineville, OR 97754

Phone: (541) 447-4474

OR other tank manufacturer approved by the Oregon Department of Environmental

Quality and approved by the COR

2.3 GROUT

A. Provide non-shrink, rapid setting, high strength mortar for sealing points and penetrations.

B. Provide high strength, non-metallic, Portland cement-based non-shrink grout.

1. Preapproved product

a. Quickcrete® FastSetTM. Non-Shrink Grout (No. 1585-09) or approved equal.

3.1 PLACEMENT

A. Bed as required to control subsidence and per manufacturer’s recommendation.

B. Install plumb and true, to grade and alignment as required per plans.

C. Provide minimum 12-inch thick ¾ chip rock bedding against undisturbed soils under pre-cast manhole bases, septic tanks, vault structures.

3.2 FINISHING AND SEALING

A. Seal points and penetrations of precast chambers, vaults, and manholes as required using non-shrink grout.

1. A premixed compound consisting of non-metallic aggregate, cement, water-reducing, and plasticizing agents and Xypex Admix C-500; capable of developing minimum compressive strength of eight thousand (8,000) psi in twenty-eight (28) days.

B. Apply one-part polyurethane caulking to final seal points and penetrations of precast, chambers, vaults, and manholes as required after completion of non-shrink grout described above. The following product has been pre-approved.

1. Sika Corporation: Sikaflex®-1a+, or equal.

DIVISION 22

PLUMBING

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PLUMBING GENERAL REQUIREMENTS

SECTION 22 00 00

PLUMBING GENERAL REQUIREMENTS

1.1 SUMMARY

A. All Plumbing work shall be performed to meet all applicable code requirements by, or under the direct supervision of a plumber licensed in the state of Oregon.

1.2 RELATED SECTIONS

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

DIVISION 31

EARTHWORK

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SITE CLEARING

SECTION 31 10 00

A. The work of this Section includes clearing and grubbing, topsoil removal, storage and replacement and disposing of vegetation and debris within the limits of the project site as shown on the DRAWINGS and as required. Vegetation and objects designated to remain shall be preserved free from injury or defacement.

1.2 SUBMITTALS

A. Certifications and Testing consistent with Submittal Procedures – Section 01 33 23.

1.3 RELATED SECTIONS

A. The following is a list of SPECIFICATIONS which may be related to this section:

1. Section 31 23 00, Excavation & Backfill.

2. Section 31 25 00, Erosion & Sediment Control

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 Park property.

B. Clearing and Grubbing

1. Special Requirements:

a. See Section 01 11 00 – Summary of Work; Subsection 1.4.B.1 Preservation of

Natural Features, Items a through g.

b. See Sheet G2, “General Notes” for additional information.

2. Do not clear and grub without prior approval from the Contracting Officer.

3. Clear from the surface of the existing ground all trees and shrubs marked for removal, brush, heavy growth of grass and weeds, rubbish, and debris.

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

5. In cut areas, completely grub the site.

6. Infill areas, where fill is less than three feet (3’) completely grub ground.

7. 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 inches (6”) loose depth, and thoroughly compact to a density equal to adjacent original ground.

D. Topsoil

1. Reference special requirements in drawings and specification section “Summary of

Work”

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

3. Remove heavy growths of grass before stripping.

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

4. Stockpile topsoil where directed by Contracting Officer for later used 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 the growth of weeds.

E. Disposal of waste materials

1. Burning materials on-site is prohibited.

2. Remove all waste materials from the site.

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FINISH GRADING

SECTION 31 22 19

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

B. Related Sections

1. General Site Construction Requirements – Section 02 05 00

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’

A. Quality Control / Assurance

1. Test Results – Gradation, Compaction

2.1 MATERIALS

A. Salvaged Topsoil

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

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

B. Surface Preparation

1. Contractor shall re-use existing topsoil.

2. Before grading, dig out weeds from planting areas by their roots and remove them from the site. Before placing topsoil in landscape areas, remove foreign matter such as construction waste, wire, cans, sticks, concrete, etc.

3. Before placing topsoil, remove all imported trench foundation material and/or bedding material present in planting areas down to the thickness of topsoil required or other material as directed by Contracting Officer.

4. Disk, till, or aerate with an approved agricultural aerator to a depth of six inches (6”).

3.3 PERFORMANCE

A. Site Tolerances

1. Total Topsoil Depth:

a. Lawn Areas – four inches (4”) minimum

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 inch (1”) 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 31 10 00. Remove organic material and other objectionable materials. Provide additional approved imported topsoil required to bring the surface to a specified elevation relative to the concrete site element.

D. Where topsoil depth is nine inches (9”) or greater, place topsoil in layers not to exceed nine inches (9”) and, to prevent settling, compact to eighty-five percent (85%) relative density under

ASTM D 1557. Do not place topsoil whose moisture content makes it prone to compaction during the placement process.

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EXCAVATION & BACKFILL

SECTION 31 23 00

PART 1 – GENERAL

A. Section Includes: Perform all excavation, shoring, dewatering, fill backfilling, compaction and grading necessary or required for the construction of the work as covered by these

Specifications and indicated on the Drawing. 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.

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

B. Oregon Standard Specifications for Construction (OSSC).

A. Submit following Section 01 33 23.

B. Submit the following under the Product Information category, as needed.

1. Sheeting and Shoring Plan: Refer to Paragraph 1.7 below and Section 01 33 23.

2. Potholing Report as described in Paragraph 3.2

3. Samples and Test Results: Furnish, without additional cost to the Owner, such quantities of import materials as may be required by the Contracting Officer for test purposes.

Cooperate with the Contracting Officer and furnish necessary facilities for sampling and testing of all material and workmanship. Submit test results for import materials. 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.

1.4 QUALITY ASSURANCE

A. Source Quality Control: Test import materials proposed for use to demonstrate that the materials conform to the specified requirements. Tests shall be performed by an independent testing laboratory. The Contractor shall be responsible for hiring an independent testing laboratory.

B. Field Quality Control:

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1. The Contracting Officer will:

a. Review and test materials proposed for use.

b. Review Site grading and borrow operations.

c. Inspect placement and compaction of fill.

2. The contractor shall excavate holes for in-place soil sampling. The contractor shall be responsible for the costs of additional inspection and re-testing resulting from non-compliance.

C. Testing Methods:

1. Durability Index: Oregon Department of Transportation, Construction Manual.

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.

1.5 EXPLOSIVES

A. The use of explosives will not be permitted on this project, unless specifically authorized, in writing, by the Contracting Officer.

1.6 REFERENCE SPECIFICATIONS

A. Whenever the words “Standard Specifications” are referred to, the reference is to the latest edition of the State of Oregon, Department of Transportation, Standard Specifications for

Construction.

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 for 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 requirements.

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PART 2 – PRODUCTS

A. Trench Foundation: Commercially available 3/4" – 0 Aggregate, Standard Specifications, Paragraph 00405.12.

B. Bedding Materials: Standard Specifications, Paragraph 00405.12

C. Import Backfill: Class A Backfill or Class B Backfill, Standard Specifications, Paragraph

00405.14. Imported non-expansive soil with a liquid limit no greater than forty (40) percent and a plasticity index no greater than fifteen (15), free from clods or rocks larger than one (1) inches in greatest dimension, and free from organic material.

D. Native Backfill: Class A Backfill, Standard Specifications, Paragraph 00405.14. 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 hauled 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.

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

Contracting Officer.

2.2 UTILITY LINE MARKING

A. All utilities shall be marked for location and identified by marking tape and/or locator wire as shown on the construction drawings and per associated specification sections

PART 3 – EXECUTION

3.1 CONTROL OF WATER

A. Groundwater Influence- Groundwater is not anticipated in the construction area but shall be addressed as follows if encountered:

1. If saturated soils are encountered when excavating the drainfield excavation shall be stopped and the Contracting officer notified.

2. If shallow groundwater and saturated soil conditions are encountered outside of the

Drainfield area, dewatering or underwater construction technique may be required for construction.

3. In addition to the groundwater level, if earthwork is performed during or soon after periods of precipitation, the subgrade 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.

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4. The over-excavation of the trench bottom may require additional treatment to stabilize the subgrade soil before backfilling. Soft and saturated subgrade soil may be mitigated with a layer of geogrid reinforcement fabric consisting of Tensar® BX 1100 Geogrid

(or approved equal) and overlain by 12 to 14 inches of compacted aggregate base. This does not apply to the drainfield trench.

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 known existing buried utilities and pipelines except building connections are shown on the Drawings in their approximate location. The Contractor shall exercise care in avoiding damage to all utilities as the Contractor 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.

1. There are no known public utilities in the project area. It is the Contractors responsibility to verify any utilities. Known utilities include electrical services to buildings, communications lines to/from buildings, water lines to building, lawn irrigation system, and the septic system that is to be abandoned.

B. Check on Locations (Potholing):

1. Contact all affected utility owners and request them to locate their respective utilities before the start of “potholing” procedures. The utility owner shall be given (7) seven days written notice before commencing potholing. If a utility owner is not equipped to locate its utility, the Contractor shall locate it.

2. Paint the location of all affected utility underground pipes, conduits and other utilities on the pavement or identify the location with suitable markers if not on pavement. In addition to the location of metallic pipes and conduits, non-metallic pipe, ducts, and conduits shall also be similarly located using the surface indicator and shall then be similarly marked.

3. After the utility survey is completed, commence “potholing” to determine the actual location and elevation of all utilities where crossings, interferences, or connections to the new pipelines are shown on the Drawing, marked by the utility companies, or indicated by surface signs. Before the preparation of piping shop drawings, or the excavating for any new pipelines or structures, the Contractor shall locate and uncover these existing to a point (1) one foot below the utility. Submit a report identifying each underground utility and its depth and station. Any variation in the actual elevations and the indicated elevation shall be brought to the Contracting Officer’s attention.

4. Excavations around underground electrical ducts and conduits shall be performed using extreme caution to prevent injury to workmen or damage to electrical ducts or conduits.

Similar precautions shall be exercised around gas lines, telephone and television cables.

5. Excavations shall have a surface dimension of no more than 18”x18”. Backfill after completion of potholing. In existing streets, pave with (1) one inch of the cutback.

C. Interferences:

1. If interferences occur at a location other than shown on the Drawings, the Contractor

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shall notify the Contracting Officer, and a method for correcting said interferences shall be supplied by the Contracting Officer. Payment of interferences that are not shown on the plans, nor which may be inferred from surface indications, shall be per the provisions of the General Conditions. If the Contractor does not expose all required utilities before shop drawing preparation, the Contractor shall not be entitled to additional compensation for work necessary to avoid interferences, nor for repair to damaged utilities.

2. Any necessary relocation of utilities, whether shown on the Drawing or not, shall be coordinated with the affected utility. The Contractor shall perform the relocation only if instructed to do so in writing from the utility and the Contracting Officer.

D. Shutdowns: Planned utility service shutdowns shall be accomplished during a period of minimum use. In some cases, this may require night or weekend work. 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.

1. 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 seventy-two (72) hours’ notice when requesting written approval. The Contractor shall program his work so that service will be restored in the minimum possible time.

3.3 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 the

Contractor’s operations. Such repair shall be to the satisfaction of the owner or agency having jurisdiction over the road. The Contractor is to take whatever means are necessary to prevent tracking of mud onto existing roads and shall keep roads free of debris.

B. Traffic Regulation: Provide such flaggers, 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 with excavation as may be necessary to warn all pedestrian and vehicular traffic of such excavations.

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

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. In public roads, exaction 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 the 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. Dust Control: Take proper and efficient steps to control dust.

F. Storage of Materials: Excavated material 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 material shaped to cause the least

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possible interference with drainage and the normal use of adjacent properties structures or roadways.

3.4 TRENCH EXCAVATION (this section does not apply to drainfield trench)

A. Excavation for pipe shall be in open cut. The trench shall be as wide as necessary for sheeting and bracing and the proper performance of the work up to the maximum width permitted by the typical cross-sections shown on the Drawings. The sides of the trenches shall be vertical in existing streets. The bottom of the trench shall be constructed to the grades and shapes indicated on the Drawings. Should the Contractor desire to use other equivalent methods, he shall submit his method of construction to the Contracting Officer for approval before its use.

B. Take care not to over excavate. Accurately grade the bottom of the trenches to provide uniform thickness of trench foundation material for bearing and support for each section of the pipe at every point along its entire length, except for the portion of the pipe sections where it is necessary to excavate for bell holes and the proper sealing of pipe joints, and as hereinafter specified. Dig bell holes and depressions for joints after the trench foundation material has been graded, and, so that the pipe rest on the trench foundation material for as nearly its full length as practicable, bell holes and depressions shall be only of such length, depth and width as required for properly making the joint. Remove stones as necessary to avoid point bearing.

C. Backfill and compact over excavations to ninety percent (90%) 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 it with bedding material.

Payment for removal and replacement of such unsatisfactory material directed by the

Contracting Officer shall be made following the provisions of the General Conditions.

D. Grade trenches so that they are uniformly sloped between the pipe elevations shown on the

Drawings. 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.

E. Provide ladders for access to the trench by construction and inspection personnel.

3.5 BACKFILL AND COMPACTION (this section does not apply to drainfield trench)

A. Place bedding and backfill materials true to the lines, grades, and cross-sections indicated on the Drawings and compacted to the degree specified on the Drawings. Place bedding and backfill materials in horizontal lifts not to exceed (6) six inches in thickness measured before compaction. The difference in level on either side of a pipe shall not exceed (4) inches.

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

Contracting Officer.

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

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

E. 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 the Contractor 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 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 of removal and replacement.

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

G. For all piping or conduits to be placed in any excavated and backfilled area, such as at manholes or for building connections, the structural backfill shall be first compacted to a level at least two and one half (2½) feet from the top of the piping or conduit elevation and then retrenched to pipe grade.

3.7 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 pipes and structures will be fully protected from damage. Keep vehicles, equipment, and material 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.

C. The support for excavation shall remain in place until the pipeline, or structure has been completed. During the backfilling of the pipeline or structure, the shoring, sheeting and bracing shall be carefully removed so that there shall be no voids created and no caving, lateral movement or flowing of the subsoils.

3.8 FINISH GRADING

A. Except where shown otherwise in the Drawings, restore the finish grade to the original contours and the original drainage patterns. Grade surfaces to drain away from structures. The finished surfaces shall be smooth and compacted.

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3.9 DISPOSAL OF EXCAVATED MATERIAL

A. Dispose of unsuitable material or excavated material above that needed for backfill offsite following the requirements of Section 01 74 19. Onsite disposal is only allowed with the approval of the Contracting Officer. Any onsite disposal allowed will be under the direction of the Contracting Officer.

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RESTORATION OF SURFACES

SECTION 31 23 33.20

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

A. Excavation & Backfill – Section 31 23 00.

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. In general, permanent restoration of paved surfaces will not be permitted until one (1) month has elapsed after excavations have been completely backfilled as specified.

C. 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.

3.1 GENERAL

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 BRICK SIDEWALK

A. Brick Sidewalk shall be restored to original condition, using salvaged bricks, as directed by the

Park.

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3.3 GRAVEL SURFACING

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

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

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

3.4 LAWNS AND IMPROVED AREAS

A. The area to receive topsoil shall be graded to a depth of not less than four (4) inches or as specified, below the proposed finished surface.

1. If the depth of existing topsoil before construction was greater than four (4) inches, topsoil shall be replaced to that depth.

B. The furnishing and placing seed and mulch shall be per Park planting requirements regarding species and other requirements.

C. When required to obtain germination, the seeded areas shall be watered in such a manner as to prevent washing out of the seed.

D. Any washout or damage which occurs shall be regraded and reseeded until a good sod is established.

E. The Contractor shall maintain the newly seeded areas, including regrading, reseeding, watering and mowing, in good condition.

3.5 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.

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EROSION & SEDIMENT CONTROL

SECTION 31 25 00

PART 1 – GENERAL

1.1 SUMMARY

A. The work under this section consists of furnishing all necessary labor, equipment, materials, and performing all operations in connection with the construction of erosion and sediment control measures.

B. General

1. All erosion and sediment control measures are to be placed before any disturbance caused by grading and or excavation and shall conform to the requirements of the appropriate regulatory agency for the State.

2. The Contractor shall be solely responsible for ensuring that erosion and sediment control measures are implemented and maintained at the site.

3. Soil disturbing activities include but are not limited to clearing and grubbing, excavation for utilities and utility structures, trenching in pathways and parking lot drive aisles, construction or modification of site drainage, grading, and preparation for final seeding.

A. Site Clearing.

1. Section 01 57 23 - Storm Water Pollution Prevention

2. Section 02 05 00 - General Site Construction Requirements

3. Section 02 41 19 - Selective Demolition

4. Section 31 10 00 - Site Clearing

5. Section 31 23 00 - Excavation & Backfill

6. Section 31 23 33.20 - Restoration of Surfaces

A. As specified in Division 01 Section 01 33 23 “Submittal Procedures.”

B. Quality Assurance/Control – The contractor shall prepare an erosion and sediment control plan for all project areas.

C. The contractor is required to provide all information to the National Park Service (NPS) for the

NPS to execute the SWPPP permit. The contractor is responsible for compliance with the permit and permit fees associated with the permit.

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A. Silt Fence

1. Materials used for silt fences consisting of fabric and posts shall be per the Pollution

Prevention Concept Plans of the construction drawings.

2. Filter fabric shall contain ultraviolet ray inhibitors and stabilizers to provide a minimum of six (6) months of expected usable construction life at a temperature range of 0 degrees to one-hundred-twenty degrees F (0° - 120° F).

B. Straw Wattles

1. The only approved Straw wattles shall be “Weed Free Rice Straw with Burlap Outer

Filter.”

3.1 CONSTRUCTION

A. Install straw wattles and other stormwater control measures approved by COR at local drainage ways to prevent silt intrusion upon adjacent drainage courses. Remove straw wattles and other stormwater control measures following the establishment of vegetation cover and utilize as directed by COR.

B. Before construction, install a silt fence along the downhill construction limits following the erosion control standard detail to prevent silt intrusion upon adjacent land.

C. Install erosion and sediment control measures on the downslope toe of all topsoil stockpiles.

D. Maintain and remove all erosion controls as specified.

E. Straw and wattles shall be placed on all exposed surfaces that will not be brought to final grading or permanent cover treatment within thirty (30) days of the exposure to reduce erosion and sedimentation by stabilizing exposed soils. Treated areas shall be checked regularly for bare spots, washouts, to assure that a good cover of rice straw is being maintained. Recover with rice straw areas that fail to establish stormwater protection as identified by the COR.

3.2 DUST CONTROL

A. In areas subject to the surface and air movement of dust, where on-site or off-site damage is likely to occur, preventive measures shall be per the Stormwater Pollution Prevention Plan

General.

3.3 SILT FENCE

A. Silt fences are appropriate for the following general locations:

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1. Immediately upstream of the point(s) of runoff discharged from a site before the flow becomes concentrated. Below disturbed areas where runoff may occur in the form of overland flow.

2. Along the downslope toe of all topsoil stockpiles.

3. Perimeter enclosure of Materials.

4. Maintenance areas.

5. Utilize synthetic filter fabric for sediment barriers with the strength that meets or exceeds the strength of materials as specified under Section 2.1 above. The filter fabric shall be purchased in a continuous roll cut to the length of the barrier to avoid the use of joints.

When joints are necessary, filter cloth shall be spliced together only at a support post, with a minimum six-inch (6”) overlap, and securely sealed.

6. The filter fabric shall be stapled or wired to the fence and six inches (6”) of the fabric shall be extended into the ground. Filter fabric shall not be stapled to existing trees.

7. Support posts shall be spaced at a maximum of six feet (6’) and driven securely into the ground a minimum of twenty-four inches (24”).

8. The height of a silt fence shall not exceed thirty-six inches (36”). Higher fences may impound volumes of water sufficient to cause the failure of the structure.

9. Silt fences and filter barriers shall be inspected immediately after each rainfall and at least daily during prolonged rainfall.

10. Silt fences shall be inspected for depth of sediment, tears in the fabric, and to see if the fabric is securely attached to the fence posts, and to see that the fence posts are firmly in the ground. Any deficiencies shall be repaired immediately.

11. Should the fabric on a silt fence of filter barrier decompose or become ineffective before the end of the expected usable life and the barrier still be necessary, the fabric shall be replaced promptly.

12. Sediment deposits should be removed after each storm event and/or when deposits reach approximately one-third (1/3) the height of the barrier or when the sediments limit or prevent the flow of water through the fabric hydraulic.

13. Any sediment deposits remaining in place after the silt fence or filter barrier is no longer required shall be dressed to conform with the existing grade, prepared, and seeded.

3.4 STRAW WATTLES EROSION CONTROL FENCE

A. Straw wattles are appropriate for the following general locations:

1. Sheet flow applications: Straw wattles shall be placed in a single row, lengthwise on the contour with ends of adjacent wattles tightly joined with one another.

2. Channel flow applications: Straw wattles shall be placed in a single row, lengthwise and oriented perpendicular to the direction of flow with ends of adjacent wattles tightly joined with one another. The barrier shall be extended to such a length that the bottoms of the end wattles are higher in elevation than the top of the lowest middle section of wattles to assure that sediment-laden runoff will flow either through or over the barrier but not around it.

3. The barrier shall be entrenched and backfilled. A trench shall be excavated the width of a wattle and the length of the proposed barrier to a minimum depth of two inches (2”) and a maximum depth of four inches (4”).

4. Wattles shall be securely anchored by stakes no more than four feet (4’) apart. Stakes or rebar shall be driven a minimum of twelve inches (12”) into the ground or deep enough into the ground to securely anchor the wattles, whichever is greater.

5. There shall be no gaps between wattles. Wattles shall be joined to prevent water from escaping between the wattles. Loose rice straw scattered over the area immediately uphill

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from a straw wattle barrier tends to increase barrier efficiency.

3.5 MAINTENANCE

A. The inspection shall be frequent and repair or replacement shall be made promptly as needed.

1. Straw wattle carriers shall be removed when they have served their usefulness, but not before the upslope areas have been permanently stabilized.

DIVISION 33

UTILITIES

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PIPE & PIPE FITTINGS: GENERAL STATEMENT

SECTION 33 00 00

A. The work in this Section includes process piping systems, utility piping systems, plumbing piping systems, pipe pressure testing, and pipe cleaning.

A. Precast Concrete Septic Tanks – Section 33 34 13.13

B. Drainage Field System – Section 33 34 51

1.3 REFERENCES

A. American Association of State Highway and Transportation Officials (AASHTO)

1. M252, Standard Specification for Polyethylene Corrugated Drainage Tubing

2. M294, Corrugated Polyethylene Pipe, twelve to twenty-four…