D2_SPECS.pdf

Specifications for

D2 Water Systems Upgrades

February 27, 2010 ii iii

TABLE OF CONTENTS

DIVISION 1 – GENERAL REQUIREMENTS

01010 – SCOPE OF WORK

01020 – MEASUREMENT & PAYMENT

01030 – CONSTRUCTION STAKING

01040 – SUBMITTALS

01050 – QUALITY CONTROL AND QUANTITY MEASUREMENTS

01060 – MOBILIZATION

01700 – PROJECT CLOSEOUT

DIVISION 2 – SITE WORK

02010 – DEMOLITION AND CLEARING

02040 – EARTHWORK

02050 – FINISH GRADING

02081 ! VALVES

02223 ! UTILITY TRENCHING AND BACKFILLING

02229 – UTILITY LINE MARKING

02232 – AGGREGATE BASE COURSE

02444 ! CHAIN LINK FENCES AND GATES

02510 – WATER DISTRIBUTION

02512 – WATER PEDESTAL & DRAIN SYSTEM

DIVISION 3 – CONCRETE

03010 – CONCRETE FORMWORK

03020 – CONCRETE REINFORCEMENT

03090 – CAST!IN!PLACE CONCRETE

03040 – CONCRETE FINISHING

DIVISION 4 – MASONRY

04010 – MORTAR AND MASONRY GROUT

04020 – REINFORCED UNIT MASONRY

iv

DIVISION 11 – EQUIPMENT

11214 – SUBMERSIBLE WATER WELL PUMPS

11993 – WATER OPERATIONS SHED

DIVISION 15 – MECHANICAL

15837 ! ELECTRIC HEATING EQUIPMENT

DIVISION 16 – ELECTRICAL

16000 ! ELECTRICAL WORK

16400 – UNDERGROUND CONTROL CABLE AND POWER DISTRIBUTION

DIVISION 1 – GENERAL REQUIREMENTS

DIVISION 1

01010 – SCOPE OF WORK

PART 1 – GENERAL

1.1 – Definitions

Contractor – the successful bidder who is awarded the contract.

Government – the Contracting Officer (CO) or designated Contracting Officer’s

Representative (COR) of the Coronado National Forest.

1.2 – Description

Contractor shall furnish all materials, equipment, transportation, labor, supervision, and other associated work needed to complete work according to the drawings and specifications.

Contractor shall provide and install walterlines, ball valves, air release valves, drain valves, valve boxes, yard hydrants, small potable water tanks, water operations sheds, chlorination equipment, meters, well/pump appurtenances, fencing, miscellaneous water facilities and appurtenances, and removal of miscellaneous infrastructure, as indentified herein and on the attached plans/figures.

Utilize Government!furnished conceptual drawings for design and construction.

Each water system must comply with ADEQ standards as a public water system.

1.3 – Location and Conditions

Work will take place at various locations on the Nogales Ranger District in Pima and

Santa Cruz Counties: Bog Springs Campground, Kent Spring Cabin, and Pena Blanca

Recreation Area.

The Bog Springs water system is located in Madera Canyon of the Santa Rita Mountains on the Nogales Ranger District in Santa Cruz County at Township 19 South, Range 14

East, Sections 26, 35, and 36. Access to the system is provided by the two!lane dirt

National Forest System Road (NFSR) 70A. This road can be accessed via NFSR 70 (Madera

Canyon Road).

The Kent Spring water system is located in Madera Canyon of the Santa Rita Mountains on the Nogales Ranger District in Santa Cruz County at T20S R14E S1. Access to the site is provided by the two!lane dirt National Forest System Road (NFSR) 4075. This road can be access via NFSR 70 (Madera Canyon Road).

The Pena Blanca water system is located at Pena Blanca Lake, which is located on the east side of the Tumacacori Mountains on the Nogales Ranger District in Santa Cruz

County, at Township 23 South, Range 12 East, Section 23. Access to the site is provided by the two!lane unpaved National Forest System Roads (NFSRs) 289 and 4200. These roads can be accessed via the two!lane unpaved State Highway 289 (Ruby Road).

A discussion of work to be completed is included in the contract STATEMENT OF WORK.

Water and Electricity is not available at any of the sites. If needed, the Contractor must provide water and/or a generator or other power source for construction activities.

It will be the Contractor’s responsibility to familiarize themselves with the existing conditions and notify the Government of any discrepancies shown in these documents.

Contractor shall provide safety fencing around work to protect public.

1.4 – Schedule

A pre!work meeting will be held at each site for clarification of the projects.

A schedule for all work must be submitted to and approved by the Government prior to the commencement of construction.

The Contractor shall notify the Government three days in advance of any construction work.

Estimated start work date for this contract is August 1, 2010. Construction will not be allowed at the Bog Springs and Kent Spring Cabin sites from March 1 through August 31 due to presence of endangered species in the area.

All work shall be completed within 90 days of award.

1.5 – Contract Administration

The Contractor shall be fully responsible for seeing that construction activities conform to the approved final drawings and specifications, and according to provisions of this contract. The Government will provide timely reviews as requested by the Contractor and may periodically review work at any time.

Construction quality control shall include supplying all the personnel, equipment, tests and reports necessary to ensure that construction is completed in compliance with the drawings, specifications and provisions of the contract.

The Contractor shall not disturb plants or soil except within the areas necessary to complete the work. The Contractor shall clearly stake limits of construction and maintain marks throughout construction. The Government will review all staking. Plants damaged or destroyed unnecessarily shall be replaced at Contractor’s expense with identical species and size of plants.

1.6 – Quality of Work

The products listed in the specifications are preferred products chosen for site compatibility and quality. However, equal or better alternatives submitted by the

Contractor will be considered and are encouraged.

Use recovered materials, recyclable materials, and environmentally preferable products and services where possible as per Executive Order 12873.

1.7 – Codes and Standards

Codes and standards of the following associations and listed publications will become part of this contract:

1. Arizona Department of Environmental Quality (ADEQ)

2. Arizona Department of Water Resources (ADWR)

3. American Water Works Association (AWWA)

4. Occupational Health and Safety Administration (OSHA) standards

5. American Society for Testing and Materials (ASTM)

6. American National Standards Institute (ANSI)

7. Steel Structures Painting Council (SSPC)

8. International Organization for Standardization (ISO)

9. National Sanitary Foundation (NSF)

All materials, workmanship, and designs shall meet specified requirements of the standards referenced in this section and other local or state codes, related to this type of work, whichever is more stringent.

1.8 – Special Construction Requirements

Upon completion of the project, all demolished improvements and other construction materials shall become the property of the Contractor and be removed from

Government land and/or disposed of in accordance with State and County standards.

Construction Access and Protection: The Contractor shall be responsible for securing the project area from the public. This includes providing the necessary security for protection of the Contractor's materials, equipment, tools and work until final acceptance by the Government.

The roadways to and within the project sites are narrow and windy, with abrupt curves and widths that vary. As such, mobilizing large equipment to the construction sites will likely require additional efforts to navigate these roads. Smaller dump trucks, concrete trucks, and standard width vehicles have accessed the site with no problems.

If the Bog Springs campground and Pena Blanca Recreation Area are open during construction, it is the Contractor’s responsibility to take appropriate care (such as the use of fencing) to protect the public from possibly injury from site activities.

Equipment and material storage: The Contractor shall obtain permission from the

Contracting Officer for equipment and material storage, and for other areas needed for construction. The safety and security of the Contractor’s equipment and materials is not guaranteed by the Government.

All site features to remain shall be protected from damage during the project.

No live trees are to be cut without permission from the COR. Tree limbs may be trimmed as necessary.

Sanitation/Garbage: No garbage service is available for Contractor use. The Contractor shall keep the construction site free of loose garbage at all times.

Campground or nearby restroom facilities will be made available for Contractor use.

1.9 – Contract Closeout

Remove temporary facilities and provide final cleaning and touch!up. Restore portions of buildings, site improvements, landscaping, and other items damaged by construction operations to the satisfaction of the Government at no additional expense to the

Government.

*** END OF SPECIFICATION 01010 ***

01020 – MEASUREMENT & PAYMENT

PART 1 – GENERAL

1.1 – Measurement & Payment

Measurement and payment for contract work will be made only for and under those pay items included in the SCHEDULE OF ITEMS. All other work and materials will be considered incidental to the completion of the items shown and no separate payment will be made.

1.2 – Determination of Quantities

The following measurements and calculations are used to determine contract quantities.

Structures will be measured according to neat lines SHOWN ON THE DRAWINGS or as altered in writing by the Government to fit field conditions.

For items that are measured by the linear foot, measurements will be made parallel to the base or foundation upon which the structures are placed.

For vehicular shipments, net certified scale weights or weights based on certified volumes will be used as a basis of measurement. Measurements will be adjusted when material has been lost from the vehicle, has been wasted, or has otherwise not been incorporated into the work. Determining true weights of hauling vehicles shall be made by weighing the empty vehicles at least once a day as directed by the

Government. Each vehicle shall bear a plainly legible identification mark.

For aggregates weighed for payment, the tonnage will not be adjusted for moisture content unless otherwise provided.

For standard manufactured items (such as fence, wire, plates, rolled shapes, pipe conduits) which are specified by gauge, weight, section measurements, and so forth, such identifications shall be considered the nominal weights or dimensions. Unless controlled by tolerances in cited specifications, manufacturer's tolerances will be accepted.

1.3 – Units of Measurement

Payment will be by units defined and determined according to U.S. Standard measure.

*** END OF SPECIFICATION 01020 ***

01030 – CONSTRUCTION STAKING

PART 1 – GENERAL

1.1 – Scope

This section specifies construction staking required for all construction needs.

PART 2 – PRODUCTS

None

PART 3 – EXECUTION

3.1 – General

The Contractor shall set all flagging, stakes, nails and string lines etc. necessary to construct a complete project as SHOWN ON THE DRAWINGS. The Contractor is responsible for verifying any existing control points shown on the plans. The Contractor shall be responsible for maintaining all staking and for replacing any stakes lost or destroyed during their use period. Construction work shall not begin on an item until the staking for that item has been approved by the Government. This approval will not relieve the Contractor of the responsibility and the associated costs for correcting any errors, whether the errors are discovered during the performance of the survey or during subsequent phases of the project.

*** END OF SPECIFICATION 01030 ***

01040 – SUBMITTALS

PART 1 – REQUIREMENTS

It will be the Contractor's responsibility to submit all items with such promptness as to cause no delay in the work. Approvals must be obtained before starting work which involves the submitted item. Contractor shall allow five (5) business days for processing of submittals by the Government. Submittals may also be referred to as shop drawings.

PART 2 – MANUFACTURER'S LITERATURE AND SHOP DRAWINGS

The Contractor shall submit three (3) copies of all submittals to the Government for approval on the items required herein. For each submittal, the Contractor must receive written approval from the Government to use the item before incorporating it into the project work. Literature must be marked or otherwise designated to show the exact model, size, etc. the Contractor proposes to use. Information must be adequate to determine compliance with the specifications. Approvals must be received for products differing from those described in the Government!supplied specifications.

Submittals will be waived if the Contractor furnishes the exact item used for design when the manufacturer's model, size, etc. are shown in the contract.

Manufacturer's literature, shop drawings, or samples are required for the following items:

1. Potable water tank and “Hot Box” enclosure.

2. Ball valves, pressure valves, air release valves, and valve boxes.

3. Water meters.

4. Pumps.

5. Conduit/conductors.

6. Chlorinators.

7. Masonry units and grout.

Contracting Officer reserves the right to require submittals in addition to those called for in individual sections.

*** END OF SPECIFICATION 01040 ***

01050 – QUALITY CONTROL AND QUANTITY MEASUREMENTS

PART 1 – DESCRIPTION

This work shall consist of providing quality control in conformance with the inspection of construction provisions of this contract to ensure compliance with the drawings, specifications, and provisions of the contract, and measuring the quantities of completed work in conformance with the provisions of the applicable specifications. The contractor shall provide all personnel, equipment, tests, and reports necessary to meet the requirements of this specification.

PART 2 – CONSTRUCTION

The Contractor shall provide and maintain a quality control system that will ensure that all services, supplies, and construction required under this contract conform to the contract requirements. The Contractor shall perform, or cause to be performed, the sampling, inspection, and testing required to substantiate that all supplies, services, and construction conform to the contract requirements.

The Contractor shall provide and maintain appropriate measuring and testing devices, equipment, and supplies to accomplish the required measurement, testing, and inspection in a timely manner. Tests, measurements, and certifications shall be made as required by the drawings and specifications. The Contractor shall take samples and perform inspections and tests necessary to achieve the quality of construction required by the contract.

Inspection and Tests. The Contractor shall maintain current records of all inspections and tests performed. The following format or one containing the following information will be acceptable to the Government:

Project Name Contract No.

Tested By

Item Test Date Location Standard Results (Initials)

The Contractor shall certify in writing that all inspections and tests were performed in accordance with specifications.

As!Built Drawings. The Contractor shall maintain a set of the contract drawings depicting as!built conditions. These drawings shall be maintained in a current condition and shall be available for review. All variations from contract drawings shall be indicated in red on the drawings. Upon completion of the contract work, as!built drawings shall be submitted to the Government.

Quantity Measurements. The Contractor shall make all measurements for computation of quantities for all work items specified for payment by Actual Quantities (AQ). The

Contractor shall compute the quantities for periodic payments; the Government will compute the quantities for the final payment based on measurements taken by the

Contractor. All Contractor measurements are subject to verification. The Contractor shall submit all field notes, calculation sheets, and other data used to determine quantities. The accepted quantities will be paid for at the contract unit price for each pay item shown in the SCHEDULE OF ITEMS. Work items not included on the SCHEDULE OF

ITEMS are considered incidental to other pay items.

Frequencies for making approvals, inspecting, sampling and testing shall be as shown in

Table 1400!1. Responsibilities shall be as shown in Table 1400!1. The following key refers to the abbreviations shown in Table 1400!1:

1. CC: Certification and/or inspection, sampling, and testing by Contractor, or

Contractor's representative.

2. CL: Approvals, inspections, sampling, testing or measuring under the direction of and certification by a qualified employee of a certified lab or by a Registered

Professional Engineer in the state of Arizona. The Contractor shall be responsible for furnishing the Professional services as shown in Table 1400!1.

TABLE 1400!1

QUALITY CONTROL, INSPECTION, SAMPLING, TESTING, AND MEASUREMENTS

Item

Approvals, inspections, sampling, minimum or tests required Frequency Certification

Concrete Cylinder set 1 CL

Concrete Air entertainment test 1 CL

Concrete Slump 1 CL

Aggregate Compaction 1 CL

Water Lines Pressure Test Per Complete Line CC

*** END OF SPECIFICATION 01050 ***

01060 – MOBILIZATION

PART 1 – GENERAL

1.1 – Description

This section specifies preparatory work and operations necessary for the movement of personnel, equipment, supplies, and incidentals to the project site, and for all other work and operations that must be performed or that cause costs to be incurred prior to beginning work on the various items at the project site.

1.2 – Basis of Payment

The Contractor can request payment for performance and payment bonds upon receipt of evidence of full payment to the surety. When separate payment for bonding cost is made, the bonding cost will be subtracted from the total contract amount for this pay item and the balance paid in accordance with the progress payment schedule outlined below.

Any bonding costs in excess of the total contract amount of this pay item will be paid under one or more other pay items under this contract as determined by the Contracting

Officer. Under no circumstances will the total amount of this contract be increased as a result of bonding costs exceeding the total contract amount of this pay item.

Progress payments will be made as follows:

1. When 5 percent or more of the original contract amount is earned from other pay items, 50 percent of the amount for mobilization, or 5 percent of the original contract amount, whichever is less, will be paid.

2. When 10 percent or more of the original contract amount is earned from other pay items, 100 percent of the amount for mobilization, or 10 percent of the original contract amount, whichever is less, will be paid.

3. Upon completion of all work on the project, any unpaid amount for mobilization will be paid.

The total of all payments shall not exceed the original contract amount for this item.

*** END OF SPECIFICATION 01060 ***

01700 – PROJECT CLOSEOUT

PART 1 ! GENERAL

1.1 ! Summary

The work of this section consists of final cleanup, closeout submittals, and final inspection procedures.

PART 2 ! PRODUCTS

Not used.

PART 3 ! EXECUTION

3.1 – Posted Operating Instructions

As specified in the individual sections. Furnish operating instructions attached to or posted adjacent to equipment. Include wiring diagrams, control diagrams, control sequence, start!up, adjustment, operation, lubrication, shut!down, safety precautions, procedures in the event of equipment failure, and other items of instruction recommended by the manufacturer.

3.2 ! Cleaning

Before scheduling the final inspection, remove all tools, equipment, surplus materials, and rubbish. Restore or refinish surfaces that are damaged due to work of this contract to original condition. Remove grease, dirt, marks, stains, foreign materials, and labels from finished surfaces. Thoroughly clean building interiors. Pick up all construction debris from the site. At time of final inspection, project shall be thoroughly clean and ready for use.

3.3 – Project Record Drawings

A. Maintain one complete full!size set of contract drawings and one full!size set of vendor!supplied drawings. Clearly mark changes, deletions, and additions using

Forest Service drafting standards to show actual construction conditions. Show additions in red, deletions in green, and special instructions in blue. Show actual locations of all utility lines encountered during construction.

B. Keep record drawings current. Make record drawings available to the Contracting

Officer for inspection at the time of monthly progress payment requests. If project record drawings are not current, the Contracting Officer may retain an appropriate amount of the progress payment.

C. On completion of the total project, submit complete record drawings. Include all shop drawings, sketches, and additional drawings that are to be included in the final set, with clear instructions showing the location of these drawings.

3.4 – Closeout Submittals

Submit before final inspection request.

A. Project Record Drawings: As specified above.

B. Guarantees and Bonds: As specified in individual sections.

C. Spare Parts and Materials: As specified in individual sections.

D. Operation and Maintenance Data: As specified in individual sections.

E. Operating Tools: As specified in the individual sections.

F. Special Tools: One set of special tools required to operate, adjust, dismantle, or repair equipment. Special tools are those not normally found in possession of mechanics or maintenance personnel.

3.5 – Substantial Completion and Final Inspection

Submit written certification that project, or designated portion of project, is substantially complete, and request in writing a final inspection. Contracting Officer will make an inspection within 10 business days of receipt of request.

A. When work is determined to be substantially complete, Contracting Officer will prepare a list of deficiencies to be corrected before final acceptance and issue a

Letter of Substantial Completion.

B. If work is not determined to be substantially complete, Contracting Officer will notify Contractor in writing. After completing work, Contractor shall resubmit certification and request a new final inspection.

3.6 – Acceptance of the Work

After all deficiencies have been corrected, a Letter of Acceptance will be issued.

*** END OF SPECIFICATION 01700 ***

*** END DIVISION 1 ***

DIVISION 2 – SITE WORK

DIVISION 2

02010 – DEMOLITION AND CLEARING

PART 1 – GENERAL

1.1 – Section Includes

A. Removal of surface debris and clearing of vegetation.

B. Removal and stockpiling of top soil.

C. Removal of existing water tank, surface and underground utilities and appurtenances, existing water well and chlorinator building equipment and appurtenances and other facilities.

1.2 – References

A. Coordinate clearing work with the Government.

B. Comply with site!specific landscape and hardscape demolition requirements found in other sections and drawings.

PART 2 – PRODUCTS

Not Used.

PART 3 – EXECUTION

3.1 – Preparation

Verify that existing plants designated to remain are identified and protected.

3.2 – Protection

A. Protect plants and features not required to be removed by construction activities.

B. Protect benchmarks, survey control points and existing structures from damage or displacement. Also protect vegetation, soils, rock faces that are outside grading limits.

3.3 – Clearing

A. Clear areas required for access to site and execution of work Stockpile top soil for future use in location designated by the COR.

B. Do not remove any trees unless approved by the COR.

C. If any archaeological artifacts or evidence is encountered, notify the Government and halt work in the area immediately.

3.4 – Removal

A. Remove and legally dispose all construction debris and extracted plant life from site.

B. Remove structures as shown on drawings. All debris shall be disposed of legally and off Government lands by the Contractor.

C. The Contractor shall perform the work as shown on the drawings. The Contractor shall cap / plug all existing utility connections associated with the removal.

*** END OF SPECIFICATION 02010 ***

02040 – EARTHWORK

PART 1 – GENERAL

1.1 – Summary

Work shall include excavation, providing drainage swales and installation of fill material.

Fill material will be needed to raise sites to ensure positive drainage and/or improve accessibility throughout site. Fill material will be commercially available aggregate base course and will be provided by contractor. A soils report has not been prepared for the project.

1.2 – References

The publications listed below form a part of this specification to the extent referenced.

The publications are referred to in the text by basic designation only.

American Society For Testing And Materials (ASTM)

1. ASTM D 422 – Test Method for Particle!Size Analysis of Soils

2. ASTM D 698 – Test Method for Laboratory Compaction Characteristics of Soil

Using Standard Effort [12,400 ft!lbf/ft (600 kN!m/m

3. ASTM D 1556 – Test Method for Density and Unit Weight of Soil in Place by the

Sand!Cone Method

4. ASTM D 2216 – Laboratory Determination of Water (Moisture) Content of Soil and Rock

5. ASTM D 2487 – Classification of Soils for Engineering Purposes (Unified Soil

Classification System)

6. ASTM D 2922 – Test Method for Density of Soil and Soil!Aggregate in Place by

Nuclear Methods (Shallow Depth)

7. ASTM D 3017 – Test Method for Water Content of Soil and Rock in Place by

Nuclear Methods (Shallow Depth)

1.3 – Definitions

Fill material are materials classified in ASTM D 2487 as GW, GP, GM, GC, SW, SP, SM and shall be MAG (Maricopa Association of Governments) or PAG (Pima Association of

Governments) ¾”!minus commercially available gradation.

PART 2 – PRODUCTS

None Specified

PART 3 – EXECUTION

3.1 – Excavation

General Requirements: Excavation shall consist of the removal of every type of material encountered except materials covered by the provisions of the SECTION 02010:

DEMOLITION AND CLEARING in the designated areas or from areas directed. The material to be excavated may include but is not limited to earth, hardpan, silt, clay, sand, gravel, cemented sand and gravel, cobbles and boulders, machine!excavatable rock, adobe, detached pieces of stone and concrete, existing fills and other unsuitable materials.

3.2 – Preservation of Property

All excavation operations shall be conducted in such a manner that street pavements, utilities or other facilities and improvements which are to remain in place permanently will not be subjected to settlement or horizontal movement. The Contractor shall furnish and install shores, or whatever means may be necessary to adequately support material carrying such improvements and shall maintain such means in position until they are no longer needed. Temporary shores or other protective means shall remain the property of the Contractor and when no longer needed shall be removed from the site. Shoring and bracing shall be effective to the bottom of the excavation, and shall be based upon calculation of pressures exerted by and the condition and nature of the materials to be retained including surcharge imparted to the side of the trench by equipment and stored materials. Removal of shoring shall be performed in such a manner as not to disturb or damage the finished improvements.

3.3 – Excavation Around Structures

Excavation within the vicinity of existing structures, utilities and drainage pipes to remain in!place shall be performed in a manner to prevent damage to the structures. Earth banks and facilities to remain in!place shall be supported as necessary during excavation.

In general, unless otherwise shown or specified, the actual side slopes will be at the

Contractor's option. Exposed slope surfaces shall be kept moist during construction to minimize local sloughing.

3.4 – Borrow

Suitable fill material from required excavations shall be exhausted before using imported fill material.

3.5 – Removal of Unsatisfactory Materials

The removal of materials which are unsatisfactory for foundations of the structures, roadways, ramps and side drains, may be required in certain areas. The Contractor shall be required to excavate any such areas to the depth directed and backfill the areas with compacted fill conforming to the requirements of paragraph: FILLS AND SUBGRADE

PREPARATION.

3.6 – Disposal of Excavated Materials

Excavated materials suitable for required fills shall be placed in temporary stock piles or used directly in the work. Excavated material not suitable for fills and unsatisfactory materials shall become the property of the Contractor and shall be removed from the site. Excavated material or waste of any kind shall be disposed of legally and with notification to the Government. Prior to placing material, the miscellaneous fill and any approved stockpile area(s) shall be cleared of trash and vegetation. Clearing shall conform to the applicable requirements of the SECTION 02010: DEMOLITION AND

CLEARING. Any stockpiles shall be placed in a manner to preclude ponding of water.

3.7 – Fills and Subgrade Preparation

Equipment: Compaction shall be accomplished by tamping roller, sheeps foot roller, rubber tired roller, vibrating compactor or mechanical tamper. It is the responsibility of the Contractor to determine the appropriate compaction equipment based on his interpretation of the site conditions and materials to be handled. All equipment, tools and machines shall be maintained in satisfactory working condition at all times.

Compaction equipment shall be suitable for consistently producing uniform densities.

3.8 ! General Requirements For Compacted Fills And Compacted Backfills

A. Control: Moisture!density relationships shall be established by the Contractor. The soil used for each maximum density test shall be classified in accordance with

ASTM D 2487 and shall include a particle size analysis in accordance with

ASTM D 422.

1. Laboratory Control: Moisture!density relationships shall be established by the

Contractor. One moisture!density relation shall be made for each classification, blend or change in classification of soil material encountered. Approval of moisture!density relations shall be obtained prior to the compacting of any material in the work. The moisture!density relations shall be determined in a laboratory in accordance with ASTM D 698. The following criteria will be met when sampling and testing the material.

a. A separate batch of materials will be used for each compaction test specimen. No material will be re!used.

b. The desired amount of mixing water will be added for each compaction test specimen, mixed well, and mixture will be placed in a container with an airtight cover and allowed to cure for 24 hours. A shorter curing time may be allowed where tests show that shortening the curing time will not affect the results.

2. Field Control: Field in!place density shall be determined in accordance with

ASTM D 1556 or ASTM D 2922. If ASTM D 1556 is used, where material greater than 2 inches is encountered, larger density apparatus will be required than that shown in figure 1 (6!1/2 inch sand cone) of ASTM D 1556 to determine the in!

place density. A scale of sufficient capacity and sensitive to 0.01 pounds shall be used to weigh materials for density determination. Field in!place moisture content shall be in accordance with ASTM D 2216 or ASTM D 3017.

a. Moisture Content Testing Frequency: At least one test per 1,000 cubic yards, for the first 10,000 cubic yards of material and one test for each 4,000 cubic yards thereafter, or fraction thereof, of each lift of fill or backfill areas compacted by other than hand!operated machines. At least one test shall be made in each 2!foot layer of compacted fill or backfill processed as a unit and not less than one test shall be made in each area. One test per 500 cubic yards, or fraction thereof, of each lift of fill or backfill areas compacted by hand!operated machines.

b. Density/Compaction Testing: Shall be per specification 01400.

3. Moisture!Density Curves for Cohesionless and Cohesive Material: Cohesionless materials include gravels, gravel!sand mixtures, sands and gravelly sands.

Cohesive materials include clayey and silty gravels, gravel!silt mixtures, clayey and silty sands, sand!clay mixtures, clays, silts and very fine sands. When results of compaction tests for moisture!density relations are recorded on graphs, cohesionless soils will show straight lines or reverse!shaped moisture!density curves, and cohesive soils will show normal moisture!density curves.

B. Settling of Fills or Backfills with Water: Settling of fills or backfills with water will not be permitted.

C. Placement: Material shall not be placed against concrete which has not been in place at least 14 days or until the concrete has attained a strength of 2,500 psi when tested. Heavy equipment shall not be operated over pipes and buried structures until at least 1 foot of fill material has been placed and compacted over them in conformance with the requirements of the paragraph: BACKFILLS. Compacted fill and backfill shall be placed with suitable equipment in horizontal layers which after compaction, shall not exceed 9 inches in depth for rubber!tired or vibratory rollers, 6 inches in depth for tamping rollers, and 4 inches in depth when mechanical tampers are used. The Contractor may vary the layer thickness within these limits for most efficient operations. Material containing stones shall be placed in a manner to prevent the stones from striking the concrete structures and to prevent the formation of voids.

D. Moisture Content: Material shall have a uniform moisture content while being placed and compacted. Water shall be added at the source, if required, or by sprinkling each layer of material during placement. Uniform distribution of moisture shall be obtained by disking, harrowing, or otherwise manipulating the soil during and after time water is added. Material containing an excess of moisture shall be manipulated with suitable implements to facilitate maximum moisture content of not more than 2 percent above optimum and a minimum moisture content of not less that 2 percent below optimum.

E. Compaction: No layer of fill shall be compacted before the practicable uniform moisture content has been obtained. If the compacted surface of any layer of material is determined by the Government to be too smooth to bond properly with the succeeding layers, it shall be scarified by an approved method. Scarified areas shall be compacted as specified for the fill placed thereon. Rollers will not be permitted to be operated over buried structures until the compacted fill over the top of the structures has reached a depth of 1 foot. Compaction equipment shall be so operated that structures are not damaged nor overstressed during compaction operations. Mechanical tampers shall be used for compaction of fill material adjacent to structures where rolling equipment is impracticable for use in compaction.

3.9 – Compacted Fill

A. Location: Compacted fill shall consist of all fill placed for roadways, embankment, structures and other areas designated in the plans.

B. Preparation for Placing: Before placing material for compacted fill, surfaces to receive compacted fill shall be cleared of all existing obstructions, vegetation and debris. All foundation surfaces to receive fill shall be smoothed, scarified and compacted to 95 percent of maximum density as determined in accordance with

ASTM D 698 for a depth of at least 12 inches using approved compaction equipment.

Unsuitable material not meeting the requirements for fill material shall be removed where directed, and replaced with suitable material and adequately compacted.

C. Compaction: Each layer of compacted fill shall be compacted to not less than 95 percent of maximum density when tested in accordance with ASTM D 698, unless shown otherwise on the plans.

3.10 – Backfills

A. Backfill Around Structures: Backfill shall consist of all fill against and/or around structures.

B. Material: Backfill material shall be obtained from the required excavation as approved by the Government. In general, the best material available will be designated as backfill and fill about structures. Backfill may consist of sand, gravelly sand, silty sands and clayey sands. Organic material, silt, clay, broken concrete or pavement, boulders and other objectionable material shall not be used. Gravel drain material shall be No. 4 to 3/4 inch in size.

C. Placing: Backfill material shall not be placed against concrete which has not been in place at least 14 days or until the concrete has attained a strength of 2,000 psi.

Backfill against concrete shall be placed in 4!inch layers.

D. Compaction: Compaction shall be not less than 95 percent of maximum density, per

ASTM D 698.

*** END OF SPECIFICATION 02040 ***

02050 – FINISH GRADING

PART 1 – GENERAL

1.1 – Work Included

Backfilling along concrete slabs, filling holes, restoring natural grades, rounding slopes, and tilling disturbed areas.

1.2 – Job Conditions

Comply with local regulations for dust control.

PART 2 – PRODUCTS

None

PART 3 – EXECUTION

3.1 – Preparation

A. The Contractor shall familiarize himself with all site conditions prior to the start of work, and shall notify the Government of any discrepancies found between site conditions and the contract documents.

B. Scheduling:

1. Schedule all work in a careful manner with all necessary consideration for the public.

2. Avoid interference with the use of, and access to adjacent facilities.

3.2 – Excess Water Control

A. Finish grading operations shall be performed during dry weather. Soil shall not be in a wet condition.

B. All standing water shall be promptly removed. Finish grading shall not resume until conditions are approved by the Government.

C. The Contractor shall be responsible for positive drainage of all areas of work.

3.3 – Finish Grading

A. Fine grade all areas, eliminating rough and low areas. Maintain levels, profiles and contours to subgrades.

B. Remove all stones, roots, grass, weeds and other foreign material while finish grading. remove and dispose legally of all debris.

C. Finish grades shall be within 0.10 foot of elevations shown.

D. Finish grading shall be approved by the COR prior to planting.

E. Backfill along all pavement edges so that none protrude over 1" above surrounding grade. Fill slopes shall be 3:1 or flatter with a 1’ flat compacted soil shoulder adjacent to the pavement.

F. Where existing facilities and structures are removed, restore ground surface to natural contours.

G. Till top 6" of all disturbed areas including abandoned roads and campsites, and areas disturbed by the Government as well as areas to be re!vegetated.

H. In area where earth is to be raked, provide weed and grass removal, either manually or with government approved herbicide application.

I. In areas where earth is to be raked, leave the topsoil undisturbed where grading is not required.

J. In areas where earth is to be raked, if minor grading is required, the top 2!inches of topsoil should be conserved on!site, then spread and hand raked over the final grade.

*** END OF SPECIFICATION 02050 ***

02081 ! VALVES

PART 1 ! GENERAL

1.1 ! Summary

This section specifies the furnishing and installation of valves.

1.2 ! Definitions

Abbreviations.

A. RS ! Rising Stem.

B. NRS ! Non!rising Stem.

C. WOG ! Water, Oil and Gas.

1.3 ! Performance Requirements

Working Pressure: 125 psi minimum for all valves unless otherwise shown.

1.4 ! Submittals

Submit sufficient descriptive literature to demonstrate compliance with these specifications for each type and brand of valve being furnished.

PART 2 ! PRODUCTS

2.1 ! Materials

A. Gate Valves: Under three inches

1. ASTM B62, Bronze.

2. Threaded connection.

a. RS, 125 pound, wedge disk; Crane 428, Jenkins 47 or approved equal.

b. NRS, 125 pound, wedge disk; Crane 438, or approved equal.

3. Flanged connection.

a. RS, 150 pound, wedge disk; Crane 429, Lunkenheimer 2157 or approved equal.

b. NRS, 150 pound, wedge disk; Crane 437, Jenkins 670 or approved equal.

B. Gate Valves: 3 inches and over

1. AWWA C509, Iron body, bronze core.

2. Threaded connection.

a. RS, 200 pound double disk, handwheel.

b. NRS, 200 pound double disk, operating nut.

3. Flanged connection

a. RS, 200 pound double disk, handwheel.

b. NRS, 200 pound double disk, operating nut.

C. Globe Valves: 3 inches and under

1. ASTM B62Bronze.

2. Threaded end connection.

a. 125 pound, metallic disk; Stockham B!16, Crane 1, or approved equal.

b. 125 pound, nonmetallic disk; Stockham B!13T, or approved equal.

3. Flanged end connection: 150 pound, metallic disk; Lunkenheimer 16, or approved equal.

D. Angle Valves: 2 inches and under

1. ASTM B62Bronze.

2. Threaded end connection.

a. 125 pound, metallic disk; , Lunkenheimer 2141, or approved equal.

b. 150 pound, nonmetallic disk; Stockham B!222, Crane 17, Lunkenheimer 17 or approved equal.

3. Flanged end connection: 150 pound, metallic disk; Powell 1219 or approved equal.

E. Swing Check Valves: 2 inches and under: Flanged end connections, Bronze, 150 pound, metallic disk; or approved equal.

F. Swing Check Valves: 3 inches and under

1. ASTM B62Bronze.

2. Threaded end connection.

a. 125 pound, metallic disk; Crane 37, Stockham B!319Y, or approved equal.

b. 125 pound, nonmetallic disk; Crane 41, or approved equal.

G. Swing Check Valves: Over 3 inches.

1. Iron body, bronze mounted swing check, renewable bronze disk and seat ring, bolt cover, with 200 psi WOG flange end connection.

2. All iron body swing check, renewable iron disk, bolt cover, with 200 psi WOG flange end connection.

3. Iron body, bronze mounted swing check composition disk, bolt cover, with 200 psi WOG flange end connection.

H. Lift Check Valves: 3 inches and under

1. ASTM B62, Bronze.

2. Threaded end connection.

a. Metallic disk; Stockham 316, or approved equal.

b. 150 pound, nonmetallic disk; Crane 27, or approved equal.

3. Flanged end connection: 200 pound, metallic disk; Stockham B!335, or approved equal.

I. Lift Check Valves: Over 3 inches: Iron body bronze mounted lift checks, renewable composition disk, bronze ring, bolted cover, 200 psi nonshock WOG.

J. Silent Check Valves

1. Body: Iron or semi!steel.

2. Pressure Rating: 125 pound or 250 pound as specified.

3. Trim.

a. Bronze, with center guided post and resilient seat.

b. Stainless steel, with center guided post and resilient seat.

4. Inserts: Resilient elastomer.

5. Spring: Stainless steel.

6. End Connections.

a. Threaded.

b. Flanged.

c. Compact type for placement between flanges.

K. Ball Check Valve

1. A nonclog sinking type ball check valve for horizontal or vertical operation in domestic sewage. Design valve such that the ball is out of liquid flow when the valve is open. Ball to move freely in housing and not to experience concentrated wear. Guide ball to and from seat by smooth ribs cast into valve body. Valve body interior to have no projections or pockets to trap solids or stringy material.

Valve cover to be removable for cleaning and ball inspection or replacement.

2. Valve Body: Cast iron with ANSI Class 125 flat faced flanges for valves 2 inches and over. Bronze body and cap for valves under 2 inches with threaded connections.

3. Ball: Sinking type hollow steel ball with vulcanized nitril rubber coating. Coating to be resistant to grease, petroleum products, animal and vegetable fats, dilute concentrations of acids and alkalies (pH 4 ! 10), tearing and abrasion; have a high load bearing capability and low compression set.

L. Plug Valves

1. Body: Ductile iron or cast steel.

2. Plug: Alloy iron, nonlubricated, single action.

3. Plug Opening.

a. 100 percent.

b. 70 percent.

c. 40 percent.

4. Position Indicator: Visual, showing open or closed position.

5. End Connections: Flanged.

M. Eccentric Plug Valve

1. Pressure Rating: 175 pound minimum.

2. Body: Semi!steel.

3. Plug: Elastomer coated.

4. Actuator.

a. Standard end wrench.

b. Adjustable memory stop.

5. End Connection.

a. Flanged.

b. Threaded.

N. Air Release Valves

1. Automatic valve with ball float and lever action closing system; Size:

a. 3/4 inch.

b. 1 inch.

2. Float: Stainless steel.

3. Internal Parts: Corrosion resistant metal.

4. Orifice: 3/32 inch minimum.

5. Outlet: 3/8 inch minimum.

O. Air and Vacuum Combination Valve (for line filling)

1. Size.

a. 1/2 inch.

b. 1 inch.

2. Body, Cover, and Baffle: Cast Iron.

3. Float: Stainless Steel.

4. Seat:

5. Internal Parts: Stainless Steel or Bronze.

P. Pressure Relief Valves

1. Code: ASME Listed.

2. Size: 3/4 inch.

3. Body: Bronze.

4. Spring: Stainless Steel.

5. Pressure Setting Range: 30 to 125 psi.

a. 75 psi.

b. 100 psi.

Q. Pressure Reducing Valve: 2 inches and under

1. Body: Bronze.

2. Pressure Rating: Minimum 150 pounds.

3. Threaded Pipe: Size ___ diameter.

4. Initial or high inlet pressure ___.

5. Outlet or reduced pressure setting ___.

6. Outlet range of adjustment desired ___.

7. Capacity requirements ___.

8. Strainer.

R. Pressure Reducing Valve: Over 2 inches.

1. Valve: Pilot operated.

2. Body: Cast Iron ASTM A48.

3. Trim: Bronze.

4. Pressure Ratings.

a. 125 Class.

b. 250 Class.

5. End Connection.

a. Flanged.

b. Threaded.

6. Size ___ diameter.

a. Adjustment Range ___.

b. Outlet or reduced pressure setting ___.

c. Strainer.

S. Valve Rods

1. Materials: Galvanized iron or steel.

2. Length: 5 feet overall length minimum.

T. Operating Nut: 2 inch square by 1!3/4 inch high.

PART 3 ! EXECUTION

3.1 ! Installation

A. Install valves according to manufacturer's installation recommendations.

B. Gate and Globe Valves.

1. Install valves on horizontal pipelines with stems vertical and pointing upward.

2. Install valves on vertical pipelines with stem pointing toward the direction of access.

C. Air Release Valves.

1. Install tee in pipeline or tap pipe at top with saddle fitting, and install air release valves with body in vertical position above pipeline.

2. Install galvanized pipe extension to direct vent outlet downward.

3. Provide and install 20 mesh (minimum) stainless steel or bronze screen on vent extension.

4. Secure screen with stainless steel clamp.

D. Valve Rods: Supply 2 valve rods of each type required to operate valves specified.

PART 4 ! MEASUREMENT AND PAYMENT

4.1 ! Method of Measurement

Measurement will be of each valve furnished and installed.

4.2 ! Basis of Payment

A. Costs associated with specific appurtenances as listed in the Schedule of Items will be on a per!unit basis.

B. All cost not specifically associated with itemized appurtenances shall be included in the unit price bid per linear foot of water pipe furnished and installed.

C. Payment will be made under the items as listed in the Schedule of Items.

*** END OF SPECIFICATION 02081 ***

02223 ! UTILITY TRENCHING AND BACKFILLING

PART 1 ! GENERAL

1.1 ! Summary

The work of this section consists of trenching, backfilling, and compacting for the construction and installation of conduits, and cables. All trenching will be open cut.

1.2 – Definition

Materials used in backfill, as shown in trench details, are defined as follows:

A. Bedding (BD): Layer placed over the excavated subgrade in a trench before laying pipe. When rock, unstable material, or wet trench is encountered at the excavated grade for utility installation, bedding is required. Materials shall be predominantly sand and gravel, having a plasticity index less than 6. Bedding may be omitted if, in the opinion of the Contracting Officer, the excavated trench bottom will adequately support and not damage the utility line.

BD!2: Gradation as follows !

Sieve Size Percent Passing

1/2-inch 100

No. 4 50 - 80

No. 40 10 - 25

B. Select Backfill (SB): Materials shall be predominantly sand and gravel, having a plasticity index less than 6.

SB!2: Gradation as follows !

Sieve Size Percent Passing

1/2-inch 100

No. 4 50 - 80

No. 40 10 - 25

C. Backfill (BF): Soil materials used to fill an excavation

1. BF!1: Materials shall be predominantly sand and gravel, having a plasticity index less than 6, and graded as follows !

Sieve Size Percent Passing

1-1/2-inch 100

1/2-inch 45 - 75

No. 40 10 - 25

2. BF!2: Soils that contain no rock larger than 6 inches at greatest dimension. If expansive clays are present, such content shall not exceed one!third of the material by volume, and shall be well mixed with noncohesive soils.

1.3 – Quality Assurance

A. All compaction testing and gradation analysis shall be conducted by an independent laboratory approved by the Contracting Officer and paid for by the Contractor. The

Contractor shall be present when samples of bedding, select backfill, and backfill materials are gathered for analysis.

B. All references to percent of maximum density will be as determined by ASTM

D698!78, Method C, at a moisture content determined to be suitable for such density. Moisture!density curves will be prepared in a certified soils testing laboratory.

C. In!Place Soil Density Testing: Procedures used shall be in accordance with ASTM

D1556!82, Density of Soil In Place By the Sand!Cone Method, or ASTM D2922!81, Density of Soil and Soil!Aggregate In Place By Nuclear Methods (Shallow Depth).

Perform at least one test within each backfill material zone (BD, SB, BF) at the following maximum intervals:

1. Vehicular Traffic Areas: 50 linear feet of trench.

2. Nontraffic Areas: 200 linear feet of trench.

1.4 ! Submittals

As specified in Section 01040. Submit a written description of barricading, shoring, cribbing, bracing, and sloping precautions.

1.5 – Project Conditions

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

B. Protect excavation from frost action and water accumulation.

C. Protect existing underground utilities from damage.

D. Minimum depth of soil cover for utility lines (measured from the top of the pipe or conduit to final construction ground elevation) is per the attached details.

1.6 – Excavation Classification

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

PART 2 ! PRODUCTS

2.1 ! General

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

2.2 – Materials for Backfilling

Furnish required bedding, select backfill, and backfill materials listed under the appropriate types of utility line in the sections to which this…