Bid Specification_Vol-2 817CM3025_Marion NC.pdf

MARION NATIONAL CEMETERY BID DOCUMENTS

NEW LAND EXPANSION 10/30/2024

NCA PROJECT NO. 817CM3025

EARTH MOVING (SHORT FORM)

31 20 11 - 1

SECTION 31 20 11

EARTH MOVING (SHORT FORM)

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Earthwork including excavation, fill, backfill, and lawn restoration.

1.2 RELATED REQUIREMENTS

A. Materials testing and inspection during construction: Section 01 45 29, TESTING LABORATORY SERVICES.

1.3 MEASUREMENT AND PAYMENT FOR ROCK EXCAVATION

A. Measurement: Cross section and measure the uncovered and separated materials, and compute quantities by the Registered Professional Land

Surveyor or Registered Civil Engineer, specified in Section 01 00 00, GENERAL REQUIREMENTS. Do not measure quantities beyond the following limits:

1. 300 mm (12 inches) outside of the perimeter of formed footings.

2. 600 mm (24 inches) outside the face of concrete work when forms are required, except for footings.

3. 150 mm (6 inches) below the bottom of pipe and maximum the pipe diameter plus 600 mm (24 inches) in width for pipe trenches.

4. Outside dimensions of concrete work when no forms are required

(trenches, conduits, and similar items not requiring forms).

B. Payment: No separate payment shall be made for rock excavation quantities shown. The contract price and time will be adjusted for overruns or underruns according to Articles, DIFFERING SITE CONDITIONS, CHANGES and CHANGES-SUPPLEMENT of the GENERAL CONDITIONS as applicable.

1.4 DEFINITIONS

A. Unsuitable Materials:

1. Fills: Topsoil, frozen materials; construction materials and materials subject to decomposition; clods of clay and stones larger than 75 mm (3 inches); organic materials, including silts, which are unstable; and inorganic materials, including silts, too wet to be stable. Existing Subgrade (except footings): Same materials as above paragraph, not capable of direct support of slabs, pavement, and

NCA PROJECT NO. 817CM3025

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31 20 11 - 2 similar items, with the possible exception of improvement by compaction, proof rolling, or similar methods of improvement.

2. Existing Subgrade (footings only): Same as Paragraph 1, but no fill or backfill. If materials differ from reference borings and design requirements, excavate to acceptable strata subject to Contracting

Officer's Representative's (COR) approval.

3. Per specification section 01 57 19 – Temporary Environmental

Controls, contractor is responsible for maintaining positive drainage away from excavations throughout construction. Suitable materials that have been made unsuitable as a result of runoff entering excavations, or from rainfall, shall be restored to suitable condition or removed at no cost to the owner.

4. Fat Clay: Soils categorized by the USCS soil classification system as CH. When encountered fay clay soils are to be undercut where present up to 2 feet below the base of foundations and 1 foot below finished grade in other areas.

B. Earthwork: Earthwork operations required within the new construction area. Also includes earthwork required for auxiliary structures and buildings and sewer and other trench work throughout the job site.

C. Degree of Compaction: Degree of compaction is expressed as a percentage of maximum density obtained by the test procedure presented in

ASTM D1557.

D. Suitable Fill:

1. Structural Fill: Material used below, or within 10 feet of structures or pavements as outlined in the Geotechnical Report.

2. General Fill: Material used to achieve grade outside of the areas considered for structural fill as outlined in the Geotechnical

Report.

3. Structural and general fill shall consist of approved materials free of organic matter and debris with a maximum particle size of 6 inches for general fill and 3 inches for structural fill. Frozen materials shall not be used, and fill shall not be placed on a frozen subgrade as outlined in the Geotechnical Report.

4. Low Plasticity Cohesive Soil: Soils categorized by the USCS soil classification system as CL, CL-ML, ML, SM, SC. Acceptable for use as Structural or General Fill as outlined in the Geotechnical

Report.

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5. Granular Fill: Soils categorized by the USCS soil classification system as GW, GP, GM, GC, SW, SP, SM, SC. Acceptable for use as

Structural or General Fill as outlined in the Geotechnical Report.

6. On-Site Fill: Soils categorized by the USCS soil classification system as CL, CL-ML, SP, or SM. Acceptable for use as Structural or

General Fill as outlined in the Geotechnical Report. Soils categorized by the USCS soil classification system as CH are acceptable for General Fill but not as Structural Fill as outlined in the Geotechnical Report.

E. Topsoil: Fertile, friable, natural topsoil of loamy character and characteristic of locality, capable of growing healthy horticultural crops of grasses.

1.5 CLASSIFICATION OF EXCAVATION

A. Unclassified Excavation: Removal and disposal of pavements and other man-made obstructions visible on the surface; utilities, and other items including underground structures indicated to be demolished and removed; together with any type of materials regardless of character of material and obstructions encountered.

B. Classified Excavation: Removal and disposal of all material not defined as rock.

C. Rock Excavation:

1. Solid ledge rock (igneous, metamorphic, and sedimentary rock).

2. Bedded or conglomerate deposits, cemented to present characteristics of solid rock which cannot be excavated without blasting; or the use of modern power excavator (shovel, backhoe, or similar power excavators) minimum 0.75 m3 (1 cubic yard) capacity, properly used, having adequate power and in good running condition.

3. Boulders or other detached stones each having a volume of 0.4 cubic meter (1/2 cubic yard) or more.

D. As a minimum, excavations shall be performed in accordance with OSHA 29

CFR, Part 1926, Subpart P, “Excavations” and its appendices, and in accordance with any applicable local and/or state regulations.

1.6 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American Nursery and Landscape Association (ANLA):

1. 2004 - American Standard for Nursery Stock.

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C. American Association of State Highway and Transportation Officials

(AASHTO):

1. T99-01 (R2004) - Moisture-Density Relations of Soils Using a 2.5 kg

(5.5 lb) Rammer and a 305 mm (12 inch) Drop.

2. T180-01 (2004) - Moisture-Density Relations of Soils Using a 4.54-kg

[10 lb] Rammer and a 457 mm (18 inch) Drop.

D. ASTM International (ASTM):

1. D698-07 - Laboratory Compaction Characteristics of Soil Using

Standard Effort.

2. D1557-07 - Laboratory Compaction Characteristics of Soil Using

Modified Effort.

E. Standard Specifications of (Insert name of local state) State

Department of Transportation, latest revision.

1.7 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Show size, configuration, and fabrication and installation details.

2. Plot plan showing elevations.

C. Test Reports: Certify each product complies with specifications.

1. Rock Excavation Report:

2. Certification of rock quantities excavated.

a. Excavation method.

b. Labor.

c. Equipment.

3. Land Surveyor's or Civil Engineer's name and official registration stamp.

D. Samples:

1. Soil Samples: Provide proposed off site or on site fill material to

COR, suitable for laboratory tests.

1.8 DELIVERY

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's name or brand, type, production run number, and manufacture date.

C. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

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PART 2 - PRODUCTS

2.1 MATERIALS

A. Fills: Materials approved from on site and off site sources.

1. Dry Density: 1760 kg/m3 (110 pcf) minimum.

2. Plasticity Index: 6 maximum.

3. Liquid Limit: 30 maximum.

B. Granular Fill:

1. Under Concrete Slab: Crushed stone or gravel graded from 25 mm

(1 inch) to 4.75 mm (No. 4).

2. Bedding for Sanitary and Storm Sewer Pipe, crushed stone or gravel graded from 13 mm (1/2 inch) to 4.75 mm (No. 4).

3. All crushed stone shall be provided by a state-qualified quarry/pit.

Construction methods are to be in accordance with INDOT Standard

Specifications.

C. Fertilizer: 5 percent nitrogen, 10 percent phosphorus, and 5 percent potash.

D. Seed: Grass mixture comparable to existing turf.

E. Sod: Comparable species with existing turf, without broken pads and torn or uneven ends. Use State Certified or State Approved sod when available.

1. Thickness of Cut: 19 mm to 32 mm (3/4 inch to 1 1/4 inches) excluding top growth.

PART 3 - EXECUTION

3.1 SITE PREPARATION

A. Clearing:

1. Clear within the limits of earthwork operations as described or designated by the COR. If unexpected fills or underground facilities are encountered, such features shall be removed at the discretion of the COR, and the excavation shall be thoroughly cleaned prior to backfill placement and/or construction.

2. Remove trees, shrubs, roots, topsoil, fences, foundations, incidental structures, paving, debris, trash and any other obstructions.

3. Remove unsuitable and excess materials from the Cemetery Property.

B. Grubbing:

1. Remove stumps and roots 75 mm (3 inches) and larger diameter.

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2. Leave undisturbed sound stumps, roots up to 75 mm (3 inches) diameter, and nonperishable solid objects minimum 900 mm (3 feet) below subgrade or finished embankment.

3. Do not leave material within the burial profile up to 2400 mm

(8 feet) below finished grade.

C. Trees and Shrubs:

1. Remove trees and shrubs, not shown for removal, within 4500 mm

(15 feet) of new construction and 2250 mm (7’-6”) of utility lines when approved in advance by the COR. Where trees are removed, the full root ball and all associated dry and desiccated soils shall be removed.

2. Remove unsuitable and excess materials from the Cemetery Property.

3. Transplant trees and shrubs with a ball of earth and burlap according to the latest issue of the, "American Standard for Nursery

Stock", of the American Association of Nurserymen, Inc.

4. Transplant trees and shrubs to a permanent or temporary position within two hours after digging.

5. Maintain trees and shrubs held in temporary locations by watering as necessary and feeding liquid fertilizer semi-annually with a minimum analysis of 5 percent nitrogen, 10 percent phosphorus and 5 percent potash.

6. Maintain plants moved to permanent positions as specified for plants in temporary locations until substantial completion.

7. Protect from damage, existing trees and shrubs. Trim, clean, and paint existing trees and shrubs including the roots, according to standard industry horticultural practice for the geographic area and plant species.

8. Do not store building materials closer to trees and shrubs to remain than the farthest extension of limbs.

D. Stripping Topsoil: Unless otherwise indicated on the drawings, extend limits of earthwork operations anywhere the existing grade is filled or cut or where construction operations have compacted or otherwise disturbed the existing grade or turf. Strip topsoil as defined herein, or as indicated in the geotechnical report, within the limits of earthwork operations as specified above, unless specifically indicated or specified elsewhere in the specifications or shown on the drawings.

Stockpile topsoil and protect as directed by the COR. Eliminate foreign

NCA PROJECT NO. 817CM3025

EARTH MOVING (SHORT FORM)

31 20 11 - 7 material larger than 0.014 cubic meter (1/2 cubic foot) in volume, from soil when stockpiled. Retain topsoil on station. Remove foreign materials larger than 50 mm (2 inches) in any dimension from topsoil used in final grading. Do not excavate wet topsoil.

1. Test soil for chemicals, pesticides and fertilizers when topsoil is removed from formerly utilized as farmland, to verify suitability for use in new lawn areas.

E. Concrete Slabs and Paving:

1. Score deeply or saw cut existing concrete slabs and paving to be removed in a neat, straight cut, sections where excavation or trenching occurs.

2. Extend pavement section, minimum of 300 mm (12 inches) on both sides of widest part of trench excavation. Provide parallel final score lines unless otherwise indicated on Drawings.

3. Remove unsuitable and excess material from the Cemetery Property.

F. Disposal:

1. Remove materials from site and disposed of at legally approved site.

2. Comply with applicable Federal, State and local regulations. Do not burn materials on site.

3.2 EXCAVATION

A. Shoring, Sheeting and Bracing: Shore, brace, or slope to an angle of repose banks of excavations to protect workmen, banks, adjacent paving, structures, and utilities, in compliance with OSHA requirements.

1. Extend shoring and bracing to bottom of the excavation. Shore excavations carried below the elevations of adjacent existing foundations.

2. Provide concrete fill support when bearing of foundation is disturbed by excavation, improper shoring or removal of shoring, placing of backfill, and similar operations, under disturbed foundations, as directed by COR. Do not remove shoring until permanent work in excavation has been inspected and approved by COR.

B. Excavation Drainage:

1. Operate pumping equipment, and install other materials, means and equipment to keep excavations free from traffic and subgrades dry, firm, and undisturbed until permanent work is received by COR.

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2. Obtain approval from COR before placement of permanent work on subgrades.

3. Remove disturbed material to firm undisturbed material after water is brought under control, when subgrade for foundations is disturbed by water. Replace disturbed subgrade in trenches by mechanically tamped sand or gravel.

C. Blasting: Blasting is not acceptable.

D. Building Earthwork:

1. Excavate foundation excavations to solid undisturbed subgrade.

2. Remove loose or soft material to solid bottom.

3. Fill excess cut under footings or foundations with 25 MPa (3000 psi) concrete, poured separately from the footings.

4. Do not tamp earth for backfilling in footing bottoms.

E. Trench Earthwork:

1. Utility Trenches (Except Sanitary and Storm Sewer):

a. Excavate to width required for sheeting and bracing and proper performance of Work.

b. Grade bottom of trenches with bell-holes, scooped-out to provide uniform bearing.

c. Support piping on undisturbed earth unless a mechanical support is indicated on Drawings.

d. The length of open trench in advance of pipe laying shall not be greater than is authorized by the COR.

2. Sanitary and storm sewer trenches:

a. Trench Width:

1) Below Point 150 mm (6 inches) Above Top of Pipe:

a) Pipe up to 300 mm (12 inches): 600 mm (24 inches) diameter.

b) Pipe Larger than 300 mm (l2 inches): 4/3 diameter of pipe plus 200 mm (8 inches).

2) Trench Width Above 150 mm (6 inches): Pipe size as required for sheeting and bracing and proper performance of the Work.

b. Bed Bottom Quadrant of Pipe:

1) Undisturbed Soil: Bell holes no larger than necessary for jointing. Backfill with clean earth, placed and tamped by hand, maximum 300 mm (12 inches) above top of pipe.

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2) Granular Fill: Depth of fill minimum 75 mm (3 inches) plus one-sixth of pipe diameter below the pipe of 300 mm

(12 inches) above top of pipe. Place and tamp fill material by hand.

c. Place and compact excess backfill using acceptable excavated materials. Do not use unsuitable materials.

d. Use granular fill for bedding where rock or rocky materials are excavated.

F. Site Earthwork:

1. Perform excavation as indicated on Drawings and as follows:

a. Remove and replace unsuitable subgrade materials, as determined by the COR.

b. Obtain material samples for soil classification, under COR's direction, for testing by an approved testing laboratory to determine suitability.

c. When unsuitable material is encountered and removed, the contract price and time will be adjusted according to Articles, DIFFERING SITE CONDITIONS, CHANGES and CHANGES-SUPPLEMENT of the

GENERAL REQUIREMENTS as applicable. Adjustments to be based on cubic meters (cubic yard) in cut section only.

d. Overexcavation for structural fill shall be backfilled up to the design footing level with granular fill, see Geotechnical Report for requirements.

e. Backfill placed against structures shall consist of granular fill or low plascticity cohesive soil. For granular values to be valid, the granular backfill must extend out and up from the base of the wall at an angle of at least 45 degrees from vertical for the active case.

2. Finished subgrade elevation as follows:

a. Pavement Areas: Bottom of pavement or base course as applicable.

b. Planting and Lawn Areas: 100 mm (4 inches) below finished grade, unless otherwise specified or indicated on the Drawings.

3.3 FILLING AND BACKFILLING

A. General: Fill or backfill when all debris, unsatisfactory soil materials, obstructions, and deleterious materials have been removed from excavation.

Any unstable soils which will receive fill, building elements, or pavements once properly cleared and benched, where necessary, should be removed or

NCA PROJECT NO. 817CM3025

EARTH MOVING (SHORT FORM)

31 20 11 - 10 scarified to a minimum depth of 10 in., moisture conditioned, and compacted per the compaction requirements in the Geotechnical Report. Compacted structural fill soils shall then be placed to the proposed design grade and the water content and compaction of subgrade soils shall be maintained until foundation or pavement construction. Proof-roll exposed subgrades with a fully loaded dump truck. Use excavated materials or borrow for fill and backfill, as applicable. Do not use unsuitable excavated materials. Do not backfill until foundation walls have been completed above grade and adequately braced, waterproofing or dampproofing applied, and pipes in contact with backfill have been installed, and work inspected and approved by

COR.

A. Proofrolling Existing Subgrade:

1. Proof roll with fully loaded tandem-axle dump truck. Make a minimum of one pass in each direction. Remove unstable uncompactable material and replace with granular fill material completed to mix requirements specified.

2. Areas excessively deflecting under the proofroll shall be delineated and subsequently addressed by the COR.

B. Placing: Place material in horizontal layers not exceeding 200 mm

(8 inches) loose depth and then compacted. Do not place material muddy, frozen, or with frost surfaces.

C. Compaction: Use approved equipment (hand or mechanical) to suit type of material compacted. Do not operate mechanized vibratory compaction equipment within 3000 mm (10 feet) of new or existing building walls without prior approval of the COR. Moisten or aerate material necessary to provide moisture content that will readily facilitate obtaining specified compaction with equipment used. Compact each layer minimum 95 percent of maximum density (or as specified on plans or below) determined according to the following test method /ASTM D1557.

1. Maximum Lift Thickness: 8 inches or less in loose thickness when heavy, self-propelled compaction equipment is used, 4 to 6 inches in loose thickness when hand-guided equipment is used for both structural and general fills as outlined in the Geotechnical Report.

Each lift of compacted fill shall be tested, evaluated, and reworked as necessary at the discretion of the COR. Each lift of fill shall be tested for density and water content at a frequency of at least one test for every 2,500 square feet of compacted fill in the

NCA PROJECT NO. 817CM3025

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31 20 11 - 11 building areas and every 5,000 square feet in pavement areas. Where not specified by local ordinance, one density and water content test shall be performed for every 100 linear feet of compacted utility trench backfill and a minimum of one test performed for every 12 vertical inches of compacted backfill.

2. Minimum Compaction Requirements: 95 percent of maximum below foundations slabs and pavements for structural fill, 90 percent of maximum if some settlement is tolerable as outlined in the

Geotechnical Report.

3. Water Content Range: Low plasticity cohesive -2 percent to +3 percent of optimum, high plasticity cohesive 0 to +4 percent of optimum, granular -3 percent to +3 percent of optimum for structural fills. As required to achieve minimum compaction requirements for general fill. Maximum density and optimum water content as determined by the modified proctor test (ASTM D 1557) as outlined in the Geotechnical Report.

4. When encountered, granular soils exposed at the footing subgrade are to be compacted in place with manually-operated compaction equipment prior to placing structural fill, steel , and/or concrete. In the case that surficial compaction is determined not to be adequate, construction of a working surface consisting of either crushed stone or a lean concrete mud mat is required prior to the placement of reinforcing steel and construction of foundations as outlined in the

Geotechnical Report.

5. Compacted Aggregate Base shall meet ISS 202, Section 301 Aggregate

Base.

3.4 GRADING

A. General: Uniformly grade areas within limits specified, including adjacent transition areas. Smooth finished surface within specified tolerance. Provide uniform levels or slopes between points where elevations are indicated, or between points and existing finished grades. Provide smooth transition between abrupt changes in slope.

B. Cut rough or sloping rock to level beds for foundations. In unfinished areas, fill low spots and level off with coarse sand or fine gravel.

C. Slope backfill outside the building away from building walls with minimum distance of 1800 mm (6 feet).

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D. Finished grade 150 mm (6 inches) below bottom line of windows or other building wall openings unless greater depth is shown.

E. Place crushed stone or gravel fill under concrete slabs on grade, tamped, and leveled, 150 mm (6 inches) thick, unless otherwise indicated on Drawings.

F. Finish subgrade in condition acceptable to the COR at least one day in advance of paving operations. Maintain finished subgrade in a smooth and compacted condition until succeeding operation has been accomplished. Scarify, compact, and grade subgrade before further construction when approved compacted subgrade is disturbed by subsequent operations or adverse weather.

G. Tolerances:

1. Subgrade and Base Course Final Grades for Paved Areas: Plus or minus

6 mm (0.25 inches) of indicated grades.

3.5 LAWN AREAS

A. General: Harrow and till new or existing lawn areas to remain, 100 mm

(4 inches) deep. Establish existing or design grades by dragging or similar operations. Do not do earthwork on wet soil. Obtain plant bed approval from COR before seeding or sodding operation begins.

B. Finished Grading: Begin after rough grading has settled. Scarify subgrade surface areas 100 mm (4 inches) deep. Apply topsoil smooth, even surface, and true grades minimum 100 mm (4 inches). Shape top and bottom of banks to form reverse curves in section; make junctions with undisturbed areas to conform to existing topography.

C. Fertilizing: Mix fertilizer into the soil 100 mm (4 inches) deep at a rate of 12 kg/100 m2 (25 pounds per 1000 square feet).

D. Seeding: Apply seed at a rate of 2 kg/100 sq.m (4 pounds per 1000 square feet). Rake seed lightly. Roll area not to exceed 225 kg/m (150 pounds per foot) of roller width.

E. Sodding: Water topsoil lightly before laying sod. Tightly butt sod strips at the ends and stagger in a running bond fashion. Place sod strips running across slope from bottom to top. Secure sodded slopes by pegging or other approved methods. Roll sodded area not to exceed 225 kg/m (150 pounds per foot) of the roller width.

F. Watering: Upon completion in any one section, water thoroughly new sod pad and soil to a sufficient depth. COR will be responsible for sod after installation and acceptance.

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3.6 DISPOSAL OF UNSUITABLE AND EXCESS EXCAVATED MATERIAL

A. Disposal: Remove surplus satisfactory soil and waste material, including unsatisfactory soil, trash, and debris, and legally dispose of Cemetery property.

3.7 CLEANING

A. Upon completion of earthwork operations, clean areas within contract limits, remove tools, and equipment. Clean site, free of debris, and suitable for subsequent construction operations. Remove debris, rubbish, and excess material from the Cemetery Property.

- - - E N D - - -

NCA PROJECT NO. 817CM3025

DEWATERING

31 23 19 - 1

SECTION 31 23 19

DEWATERING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Implementation of Erosion and Sedimentation Control Plan.

2. Dewater excavations, including seepage and precipitation.

B. Provide all labor, materials, tools, equipment, power, and services necessary for care of water and erosion control. Begin excavation work before the approved Erosion and Sedimentation Control Plan is in place.

1.2 RELATED REQUIREMENTS

A. Materials testing and inspection during construction: Section 01 45 29, TESTING LABORATORY SERVICES.

B. Safety Requirements: Section 00 72 00, GENERAL CONDITIONS, Article, ACCIDENT PREVENTION.

C. Submittal requirements as specified in Section 01 33 23 SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

D. Protection of existing utilities, fire protection services, existing equipment, roads, and pavements: Section 01 00 00, GENERAL

REQUIREMENTS.

E. Subsurface Investigation: Section 01 00 00, GENERAL REQUIREMENTS, Article 1.11, PHYSICAL DATA.

F. Erosion Control: Section 01 57 23, TEMPORARY STORM WATER POLLUTION

CONTROLS.

1.3 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Show drawings and data with method employed in dewatering excavated areas, 30 days before commencement of excavation.

2. Show location, depth and size of wellpoints, headers, sumps, ditches, size and location of discharge lines, capacities of pumps and standby units, and detailed description of dewatering methods to be employed to convey water from site to adequate disposal. Show details of the dewatering facilities, including equipment and erosion protection. Include facilities and procedures for insuring

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31 23 19 - 2 discharge water quality according to the applicable provisions of

Erosion Control Plan or SWPPP or NPDES requirements, Section

01 57 23, TEMPORARY STORM WATER POLLUTION CONTROLS.

3. Include written report outlining control procedures to be adopted when a dewatering problem arises.

4. Submit materials in format acceptable to all regulatory agencies.

C. Inspection Reports.

D. All required permits.

E. Delegated Design Drawings and Calculations: Signed and sealed by responsible design professional.

1. Identify deviations from details shown on drawings.

1.4 QUALITY ASSURANCE

A. Permitting Requirements: Comply and obtain required Federal, State, and

County permits where Work is performed.

B. Comply and provide information to Contracting Officer's Representative

(COR), all conditions of regulating permits. Obtain written approval from COR before discontinuing operation of dewatering system.

PART 2 - PRODUCTS

2.1 SYSTEM DESCRIPTION

A. Dewatering: Lower and control ground water table levels and hydrostatic pressures and control surface water.

2.2 SYSTEM PERFORMANCE

A. Delegated Design: Prepare submittal documents including design calculations and drawings signed and sealed by registered design professional, licensed in state where work is located.

1. Minor deviations to details shown on drawings to accommodate manufacturer’s standard products may be accepted by COR when deviations do not affect design concept and specified performance.

B. Design dewatering system complying with specified performance:

1. Size and Capacity: At least 300 mm (1 foot) below lowest foundation subgrade or bottom of pipe trench.

2. Reduce hydrostatic head below excavation surface minimum 300 mm (1 foot) until backfill has been completed at least 300 mm (1-foot) above the initial observed groundwater level.

3. Prevent loss of fines, seepage, boils, quick conditions or softening of foundation strata.

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4. Maintain stability of sides and bottom of excavation.

5. Construction operations are performed in the dry subgrade.

6. Control of surface and subsurface water as part of dewatering requirements. Maintain adequate control.

a. Stabilize excavated and constructed slopes not adversely affected by saturated soil.

b. Control erosion.

c. Flooding of excavations or damage to structures does not occur.

d. Surface water drains away from excavations.

e. Protect excavations of becoming wet from surface water before additional work is undertaken.

PART 3 - EXECUTION

3.1 INSTALLATION - GENERAL

A. Install dewatering system to lower and control ground surface water to permit excavation, construction of structure, and placement of backfill materials in dry conditions. Make dewatering system adequate to pre-drain the water-bearing strata above and below bottom of structure foundations, utilities and other excavations.

B. Reduce hydrostatic pressure head in water-bearing strata below structure foundations, utility lines, and other excavations, minimum

300 mm (1 foot) below prevailing excavation surface.

C. Operation:

1. Place dewatering system in operation before excavation below ground water table. Operate system continuously 24 hours a day, 7 days a week until construction work below existing ground water level is complete.

2. Place adequate weight of backfill material to prevent buoyancy before discontinuing operation of the system.

D. Water Disposal:

E. Dispose water removed from excavations in such a manner as:

a. Avoid endanger portions of work under construction or completed.

b. Avoid inconvenience to Government or to others working near site.

c. Comply with permit regulations for disposal of water.

d. Control Runoff: Control runoff in work areas including but not limited to excavations, access roads, parking areas, laydown, NCA PROJECT NO. 817CM3025

DEWATERING

31 23 19 - 4 and staging areas. Provide, operate, and maintain all ditches, basins, sumps, culverts, site grading, and pumping facilities to divert, collect, and remove all water from the work areas.

Remove water from work areas and dispose according to applicable permits.

2. Excavation Dewatering:

a. Divert, collect, control, and remove water from construction work areas and excavations.

b. Arrange drainage features and alter as required to avoid degradation of the final excavated surfaces.

c. Utilize all necessary erosion and sediment control measures to avoid construction related degradation of natural water quality.

3. Remove and dispose surface and ground water entering excavations, trenches, and work areas during construction. Keep excavation dry during subgrade preparation and until construction is complete and pipe is installed to avoid damage from hydrostatic pressure, flotation, or other cause will result.

F. Standby Equipment:

1. Install complete standby equipment for immediate operation, as required to maintain de-watering on a continuous basis and in the event that all or any part of the system become inadequate or fail.

G. Corrective Action:

1. Perform work necessary to restore foundation soil and damaged structure resulting from failure of dewatering system.

H. Damages:

1. Immediately repair damages to adjacent facilities caused by dewatering operations.

NCA PROJECT NO. 817CM3025

CEMENT AND CONCRETE FOR EXTERIOR IMPROVEMENTS

32 05 23 - 1

SECTION 32 05 23

CEMENT AND CONCRETE FOR EXTERIOR IMPROVEMENTS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Site work concrete.

2. Curb, gutter, and combination curb and gutter.

3. Pedestrian Pavement: Walks, flower/water stations, mow strips, wheelchair curb ramps, and plaza areas.

4. Vehicular Pavement: driveways.

5. Equipment Pads: Transformers, irrigation field satellites.

6. Precast Concrete Pavers: Truncated Domes

1.2 RELATED REQUIREMENTS

A. Laboratory and Field Testing Requirements: Section 01 45 29, TESTING

LABORATORY SERVICES.

B. Subgrade Preparation: Section 31 20 11, EARTH MOVING-SHORT FORM.

C. Concrete Materials, Quality, Mixing, Design and Other Requirements:

Section 03 30 53, SHORT FORM CAST-IN-PLACE CONCRETE.

D. Metal Components of Steps (Nosing and Railing): Section 05 50 00, METAL

FABRICATIONS.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American Association of State Highway and Transportation Officials

(AASHTO):

1. M31M/M31-15 - Deformed and Plain Carbon-Steel Bars for Concrete

Reinforcement.

2. M55M/M55-09 - Steel Welded Wire Reinforcement, Plain, for Concrete, Single User.

3. M147-65 (2004) - Materials for Aggregate and Soil-Aggregate Subbase, Base, and Surface Courses.

4. M148-05 - Liquid Membrane-Forming Compounds for Curing Concrete.

5. M171-05 - Sheet Materials for Curing Concrete.

6. M182-05(2012) - Burlap Cloth Made from Jute or Kenaf and Cotton

Mats.

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7. M213-01(2010) - Preformed Expansion Joint Fillers for Concrete

Paving and Structural Construction (Nonextruding and Resilient

Bituminous Types).

8. M233-86 - Boiled Linseed Oil Mixture for Treatment of Portland

Cement Concrete.

9. T99-15 - Moisture-Density Relations of Soils Using a 2.5-kg.

(5.5-lb) Rammer and a 305-mm (12-in.) Drop.

10. T180-15 - Moisture-Density Relations of Soils Using a 4.54-kg

(10-lb) Rammer and a 457-mm (18-in.) Drop.

C. American National Standards Institute (ANSI):

1. B101.3 - Wet DOCF of Common Hard Surface Floor Materials (Including

Action and Limit Thresholds for the Suitable Assessment of the

Measured Values).

D. ASTM International (ASTM):

1. A775/A775M-16 - Epoxy-Coated Steel Reinforcing Bars.

2. C94/C94M-16 - Ready-Mixed Concrete.

3. C143/C143M-15a - Slump of Hydraulic Cement Concrete.

4. C1116/C1116M-10a(2015) - Fiber-Reinforced Concrete.

5. D5893/D5893M-10 - Cold Applied, Single Component, Chemically Curing

Silicone Joint Sealant for Portland Cement Concrete Pavements.

6. D6690-15 - Joint and Crack Sealants, Hot Applied, for Concrete and

Asphalt Pavements.

1.4 PREINSTALLATION MEETINGS

A. Conduct preinstallation meeting at project site minimum 30 days before beginning Work of this section.

1. Required Participants:

a. Contracting Officer's Representative (COR).

b. Inspection and Testing Agency.

c. Contractor.

d. Installer.

e. Other installers responsible for adjacent and intersecting work, including excavation, plantings, traffic markings, and irrigation.

2. Meeting Agenda: Distribute agenda to participants minimum 3 days before meeting.

a. Installation schedule.

b. Installation sequence.

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c. Preparatory work.

d. Protection before, during, and after installation.

e. Installation.

f. Terminations.

g. Transitions and connections to other work.

h. Inspecting and testing.

i. Other items affecting successful completion.

3. Document and distribute meeting minutes to participants to record decisions affecting installation.

1.5 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Show size, configuration, and fabrication and installation details.

2. Show reinforcing.

3. Include jointing plan for concrete pavements, curbs and gutters.

C. Manufacturer's Literature and Data:

1. Description of each product.

a. Expansion joint filler.

b. Hot poured sealing compound.

c. Reinforcement.

d. Curing materials.

2. Installation instructions.

D. Samples:

1. Exposed Aggregate Concrete Panel: 0.4 sq. m by 50 mm (4 sq. ft. by

2 inches) thick, 2 required, each color and finish.

E. Test Reports: Certify products comply with specifications.

1. Job-mix formula.

2. Select subbase materials.

F. Certificates: Certify products comply with specifications.

1. Expansion joint filler.

2. Reinforcement.

3. Curing materials.

4. Concrete protective coating.

G. Qualifications: Substantiate qualifications comply with specifications.

1. Installer with project experience list.

2. Land surveyor.

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H. Concrete mix design.

I. Select subbase job-mix design: Report the following:

1. Material sources.

2. Gradation.

3. Plasticity index.

4. Liquid limit.

5. Laboratory compaction curves indicating maximum density at optimum moisture content.

1.6 QUALITY ASSURANCE

A. Installer Qualifications:

1. Regularly installs specified products.

2. Installed specified products with satisfactory service on five similar installations.

a. Project Experience List: Provide contact names and addresses for completed projects.

B. Land Surveyor: Professional land surveyor or engineer registered to provide land surveys in jurisdiction where project is located.

C. Preconstruction Testing:

1. Engage independent testing laboratory to perform tests and submit reports.

a. Deliver samples to laboratory in number and quantity required for testing.

2. Concrete mix design.

1.7 DELIVERY

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's name or brand, type, and manufacture date.

C. Deliver steel reinforcement to prevent damage.

D. Before installation, return or dispose of products with damaged or opened packaging and distorted or damaged steel reinforcement.

E. Bulk Products: Deliver bulk products away from buildings, utilities, pavement, and existing turf and planted areas. Maintain dry bulk product storage away from contaminants.

1.8 STORAGE AND HANDLING

A. Store products indoors in dry, weathertight facility.

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B. Protect products from damage during handling and construction operations.

1.9 FIELD CONDITIONS

A. Place concrete as specified under Article 3.4 E., for Cold Weather

Placement and Article 3.4 D., for Hot Weather Placement of Section

03 30 53, SHORT FORM CAST-IN-PLACE CONCRETE.

1.10 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warranty of

Construction."

PART 2 - PRODUCTS

2.1 CONCRETE

A. Concrete: Type C, air-entrained as specified in Section 03 30 53, SHORT

FORM CAST-IN-PLACE CONCRETE, except as follows:

TYPE MAXIMUM SLUMP*

Curb & Gutter 75 mm (3 inches)

Pedestrian Pavement 75 mm (3 inches)

Vehicular Pavement 50 mm (2 inches) (Machine

Finished)

100 mm (4 inches) (Hand Finished)

Equipment Pad 75 to 100 mm (3 to 4 inches)

* For concrete to be vibrated: Slump as determined by

ASTM C143/C143M. Tolerances as established by ASTM C94/C94M.

B. Portland Cement Concrete: Refer to Section 502 of ISS 2020. The concrete shall be air entrained and have a minimum compressive strength of 4,000 psi after 28 days of laboratory curing per ASTM C-31 as outlined in the Geotechnical Report.

C. Compacted Aggregate Base No. 53: Compacted Aggregate Base shall meet

ISS 202, Section 301 Aggregates

2.2 REINFORCEMENT

A. Steel Reinforcement: Type, amount, and locations as shown on drawings and as specified.

B. Epoxy-Coated Steel Reinforcement: ASTM A775/A775M.

C. Welded Wire-Fabric: AASHTO M55M/M55.

D. Dowels: Plain steel bars complying with AASHTO M31M/M31.

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E. Tie Bars: Deformed steel bars complying with AASHTO M31M/M31.

F. Fiber Reinforcement: Polypropylene fibers designed for use in concrete pavement, complying with ASTM C1116/C116M, Type III, 13 to 38 mm (1/2 to 1 1/2 inches) long. Include 2.27 kg (5 lbs.) per.76 cu. m (1 cu.

yd.) of concrete in batch.

2.3 SELECT SUBBASE (WHERE REQUIRED)

A. Subbase: Select granular material composed of sand, sand-gravel, crushed stone, crushed or granulated slag, with or without soil binder, or combinations of these materials conforming to AASHTO M147, Grading E or F.

1. Materials meeting other gradations than that noted will be acceptable whenever gradations are within tolerance of three to five percent, plus or minus, of single gradation established by job-mix formula.

B. Subbase Material: Compacted, dense-graded course, meeting specified density requirement.

2.4 FORMS

A. Forms: Metal or wood, straight and suitable in cross-section, depth, and strength to resist springing during depositing and consolidating of concrete.

B. Tolerance: 3 mm (1/8 inch) maximum variation from straight line in any

3000 mm (10 foot) long section, in either a horizontal or vertical direction.

C. Wood Forms: Minimum 50 mm (2 inches) thick (nominal), free from warp, twist, loose knots, splits, or other defects. Provide approved flexible or curved forms for forming radii.

2.5 CONCRETE CURING MATERIALS

A. Concrete Curing Materials: Comply with one of the following:

1. Burlap: AASHTO M182, weighing 233 g/sq. m (7 oz./sq. yd.) dry.

2. Impervious Sheeting: AASHTO M171.

a. Polyethylene: Minimum 0.1 mm (4 mils) thick.

2.6 EXPANSION JOINT FILLERS

A. Expansion Joint Filler: AASHTO M213.

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2.7 ACCESSORIES

A. Equipment and Tools: Obtain COR's approval of equipment and tools for handling materials and performing work before work begins. Maintain equipment and tools in satisfactory working condition at all times.

B. Sealants:

1. Concrete Paving Expansion Joints: ASTM D5893/D5893M, Type SL, single component, self-leveling, silicone joint sealant.

2. Concrete Paving Joints: ASTM D6690, Type IV, hot-applied, single component joint sealant.

C. Joints:

1. Construction/Control: Sawcut one quarter of the depth of the concrete, cut as soon as the slab can support the weight of a laborer and saw.

2. Expansion: Full depth saw cut, pavement edges at the joint shall be thickened by two inches, transition pavement thickness over a minimum distance of five feet.

D. Concrete Protective Coating: AASHTO M233 linseed oil mixture.

2.8 CEMENT, SAND, AGGREGATES AND OTHER ADDITIVES

A. Cement, Sand and Aggregate Color: As required to match paver colors.

B. Provide silicon carbide or aluminum oxide grains as required to match paver colors.

2.9 DETECTABLE WARNING PRECAST CONCRETE PAVERS

1. Precast Concrete: 8,500 PSI minimum at 28 Days, less than 4% absorption, 155 lbs/cu. Ft. density and 1,100 psi minimum flexural strength.

2. Size: 12” x 12” square.

3. Color: Charcoal.

4. Tolerance: 1/8”.

5. Truncated Domes: Shall meet the ADA and ABA requirements for sizing and spacing.

6. Setting Pavers

a. Latex Mortar Mix for setting: ANSI A-118.4

b. Water: Clean and free of deleterious acids, alkalies or organic materials.

c. Grout: ANSI A-118.6, Grout – Latex

d. Sealant, Backup and Bond Breaker: As specified in Section

079200.

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PART 3 - EXECUTION

3.1 PREPARATION

A. Examine and verify substrate suitability for product installation.

B. Protect existing construction and completed work from damage.

C. Prepare, construct, and finish subgrade as specified in Section

31 20 11, EARTH MOVING-SHORT FORM.

D. Maintain subgrade in smooth, compacted condition, complying with required section and established grade until succeeding operation has been accomplished.

3.2 SELECT SUBBASE (WHERE REQUIRED)

A. Mixing: Proportion select subbase by weight or by volume in quantities so final approved job-mixed formula gradation, liquid limit, and plasticity index requirements will be met after subbase course has been placed and compacted. Add water in approved quantities, measured by weight or volume, to produce uniform blend.

B. Placing:

1. Place mixed material on prepared subgrade in uniform layer to required contour and grades, to maximum 200 mm (8 inches) loose depth that, when compacted, will produce layer of required thickness.

2. When required compacted thickness exceeds 150 mm (6 inches), place subbase material in equal thickness layers. Remove unsatisfactory areas and replace with satisfactory mixture, or mix material in placement area.

3. Adding thin layers of material to top layer in order to meet grade will not be permitted.

4. When subbase elevation is 13 mm (1/2 inch) or more below grade, excavate top layer and replace with new material to minimum 75 mm

(3 inches) compacted thickness.

C. Compaction:

1. Perform compaction with approved hand or mechanical equipment well suited to material being compacted.

2. Moisten or aerate material as required to provide moisture content that will readily facilitate obtaining specified compaction with equipment used.

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3. Compact each subbase layer to minimum 95 percent or 100 percent of maximum density as specified by AASHTO T180 or AASHTO T99, respectively.

D. Tolerances:

1. Test completed subbase for grade and cross section with straight edge.

2. Surface Variation: Maximum 10 mm (3/8 inch) each layer.

3. Variation from Indicated Thickness: Maximum 13 mm (1/2 inch).

E. Protection:

1. Maintain finished subbase in smooth and compacted condition until concrete is placed.

2. When subsequent construction operations or adverse weather disturb approved compacted subbase, excavate and reconstruct subbase with new material meeting specified requirements, at no additional cost to Government.

3.3 SETTING FORMS

A. Form Substrate:

1. Compact form substrate to uniformly support forms along entire length at grade as shown on drawings.

2. Correct substrate imperfections or variations by cutting or filling and compacting.

B. Form Setting:

1. Set forms sufficiently in advance of concrete placement to permit performance and approval of operations required with and adjacent to form lines.

2. Set forms to indicated line and grade and use stakes, clamps, spreaders, and braces to prevent movement in any direction.

3. Tolerances: Conform to line and grade with 3 mm (1/8 inch) tolerance when checked with straightedge, with maximum 6 mm (1/4 inch) deviation from true line at any point.

4. Remove forms when removal will not damage concrete and when required for finishing.

5. Clean and oil forms before each use.

C. Land Surveyor: Establish and control alignment and form grade elevations or concrete slipforming machine operations.

1. Make necessary corrections to forms immediately before placing concrete.

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2. When any form has been disturbed or any subgrade or subbase has become unstable, reset and recheck form before placing concrete.

3.4 PLACING REINFORCEMENT

A. Keep reinforcement free of dirt, oil, rust, scale or other substances preventing concrete bond.

B. Install reinforcement as shown on drawings.

C. Support and securely tie reinforcing steel to prevent displacement during concrete placement.

D. Obtain COR's approval of reinforcement placement before placing concrete.

E. Synthetic Fiber in Flatwork: Uniformly disperse in concrete mixture at

3 kg/cu. m (5 lbs./cu. yd.) minimum rate.

3.5 PLACING CONCRETE - GENERAL

A. Preparation:

1. Obtain COR's approval.

2. Remove debris and other foreign material from between forms.

3. Uniformly moisten subgrade, base, or subbase without standing water.

B. Convey concrete from mixer to final location without segregation or loss of ingredients. Deposit concrete to minimize handling.

C. During placement, consolidate concrete by spading or vibrating to minimize voids, honeycomb, and rock pockets.

1. Vibrate concrete against forms and along joints.

2. Avoid excess vibration and handling causing segregation.

D. Place concrete continuously between joints without bulkheads.

E. Install construction joint whenever concrete placement is suspended for more than 30 minutes and at end of each day's work.

F. Workmen or construction equipment coated with foreign material will not be permitted to walk or operate in concrete during placement and finishing operations.

3.6 PLACING CONCRETE FOR CURB AND GUTTER, PEDESTRIAN PAVEMENTS, AND

EQUIPMENT PADS

A. Place concrete in one layer conforming to cross section shown on drawings after consolidating and finishing.

B. Deposit concrete near joints without disturbing joints. Do not place concrete directly onto joint assemblies.

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C. After concrete has been placed in forms, use a strike-off guided by side forms to bring surface to proper section to be compacted.

D. Consolidate concrete thoroughly by tamping and spading, or with approved mechanical finishing equipment.

E. Finish concrete surface to grade with wood or metal float.

F. Construct concrete pads and pavements with sufficient slope to drain, preventing standing water.

3.7 PLACING CONCRETE FOR VEHICULAR PAVEMENT

A. Deposit concrete into forms as close as possible to its final position.

B. Place concrete rapidly and continuously between construction joints.

C. Strike off concrete and thoroughly consolidate with finishing machine, vibrating screed, or by hand-finishing.

D. Finish surface to elevation and crown as shown on drawings.

E. Deposit concrete near joints without disturbing joints. Do not place directly onto joint assemblies. Do not place adjacent lanes/areas without COR's approval.

F. Curb-Forming Machines: Curb-forming machines for constructing integral curbs, curbs, and gutter will be approved based on trial use on project. If equipment produces unsatisfactory results, discontinue use and accomplish work by hand method construction as specified. Remove unsatisfactory work and reconstruct full length between regularly scheduled joints. Legally dispose of removed portions off project site.

3.8 PLACING DETECTABLE WARNING PRECAST CONCRETE PAVERS

A. Mortar Setting Bed

1. Verify cast-in-place concrete block out for precast pavers allow for the following tolerances prior to installation.

a. Maximum of 1/16 inch height variation between adjacent pavers.

b. Individual pavers shall not vary more than 1/16 inch from level across width of the paver.

c. Paved areas shall not vary more than 1/4 inch from level in a distance of 10 feet measured…