Attachment_2_-_Specs.pdf

North Delta Storage Building

List of Specifications

SECTION 01010 SUMMARY OF WORK

SECTION 01050 FIELD ENGINEERING

SECTION 012500 UTILITY COMPANY COORDINATION

SECTION 01300 SUBMITTALS

SECTION 01530 BARRIERS

SECTION 01600 MATERIAL AND EQUIPMENT

SECTION 01700 PROJECT CLOSEOUT

SECTION 01900 MOBILIZATION

SECTION 02200 BUILDING DEMOLITION

SECTION 02210 SITE GRADING

SECTION 02221 UTILITY TRENCHING AND BACKFILLING

SECTION 02229 UTILITY LINE MARKING

SECTION 02232 AGGREGATE BASE COURSE

SECTION 02602 TESTING AND DISINFECTING WATER LINES

SECTION 03306 STRUCTURAL CONCRETE

SECTION 05500 METAL FABRICATIONS

SECTION 06100 CARPENTRY

SECTION 07900 CAULKING AND SEALANTS

SECTION 08110 DOORS AND FRAMES

SECTION 08331 OVERHEAD ROLLING DOORS

SECTION 08520 WINDOWS

SECTION 09250 GYPSUM BOARD

SECTION 09650 VINYL FLOORING

SECTION 09900 PAINTING

SECTION 09986 SANITARY WAINSCOT PANELS

SECTION 10800 TOILET AND BATH ACCESSORIES

SECTION 13121 PRE-ENGINEERED METAL BUILDING

SECTION 15500 HEATING VENTING AND AIR CONDITIONING

SECTION 16010 ELECTRICAL GENERAL PROVISIONS

SECTION 16050 BASIC MATERIALS AND METHODS

SECTION 16400 SERVICE AND DISTRIBUTION

SECTION 16510 LIGHTING FIXTURES

List of Drawings

G-01 COVER SHEET

C-01 EXISTING SITE PLAN

C-02 PROPOSED BUILDING LOCATION

C-03 PROPOSED UTILITIES PLAN

C-04 DEMOLITION PLAN

C-05 HYDRANT AND BOLLARD DETAIL

A-01-02 FLOOR PLAN & ELEVATIONS

A-03-05 BUILDING SECTIONS AND SCHEDULES

S-01-02 STRUCTURAL DETAILS

S-03-05 FOUNDATION DETAILS

MEP-01-03 MECHANICAL AND PLUMBING

MEP-004-06 ELECTRICAL

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

1.1 SECTION INCLUDES:

A. Description of work.

B. Owner responsibility.

1.2 DESCRIPTION:

A. Work under this contract consists of the following items of work: Base

Bid

1. Purchase and erection of a pre-engineered metal building for the following uses:

a. 4,600-square-foot pre-engineered. Exterior siding is to be architecturally compatible with existing structures on the site.

b. Site utilities including extensions of water, sewer, telephone, gas systems and the connection to existing sewer.

1.3 LOCATION:

A. Project is located on 1560 H 50 Road, Delta CO B. Project owner is the U.S. Forest Service.

1.4 OWNER RESPONSIBILITY:

A. The owner’s responsibility for project construction includes:

1. Review and approve shop drawings, product data and submittals from the

Contractor.

2. Prepare and approve Contractor payment invoices and final payments.

3. Review and authorize contract change orders.

4. Provide project inspection and approval of Contractor’s work.

5. Provide access to the site for performance of specified work.

1.5 CONTRACTOR’S USE OF PREMISES:

A. Construction camping within the site will not be allowed.

B. The Contractor shall conduct his operations to minimize inconvenience to the public and site operations. The Contractor may close portions of the site during construction, providing temporary access lanes. The traffic control plan shall be developed and approved by the Contracting Officer. Access to existing buildings and fire suppression equipment must be maintained.

C. Storage of construction materials shall be limited to those areas designated and approved by the Owner.

D. The Contractor shall take precautions to locate and protect all existing utility lines.

Notify utility companies and the Contracting Officer prior to excavations in the vicinity of known utilities.

1. Should damage occur to an unknown utility, repairs shall be performed as directed by the Contracting Officer. Damage to existing utilities shall be repaired by the Contractor at no additional cost to the Owner.

E. The Contractor shall comply with all legal load requirements of the State of

Colorado and County Jurisdictions when operating on area access roads. Damage to existing roadways from equipment operation or excessive loads shall be repaired by the Contractor at no additional cost to the Owner.

F. Surplus excavated soil material shall be spread around the site.

1.6 FIELD VERIFICATION:

A. The Contractor shall field-verify all new and existing dimensions and field conditions prior to starting work or ordering products.

1.7 CONTRACTOR-FURNISHED ITEMS:

A. The Contractor shall furnish all labor, materials and equipment necessary for the completion of the work, as specified.

END OF SECTION

SECTION 01050

FIELD ENGINEERING

PART 1 – GENERAL

1.1 CONTRACTOR RESPONSIBILITIES

A. The building corner elevations and locations shall be located by the Contractor and approved by the Contracting Officer. It will be the responsibility of the Contractor to maintain the stakes and confirm that they conform to the drawings. Any discrepancies shall be brought to the Contracting Officer’s attention.

B. The Contractor is responsible for surveying and staking lines and grades for all earthwork and utilities, including electrical conduits.

1.2 CONSTRUCTION STAKING

A. This work shall consist of the construction staking of roads, parking and structures in accordance with the drawings and specifications. Work includes furnishing all labor, equipment, instruments, materials, transportation, and other incidentals necessary to complete the construction staking in accordance with these specifications and acceptable engineering practice. Work shall also include grade setting for finished grade and staking of structures as required.

B. Construction staking shall be performed under the direction of a registered professional engineer or land surveyor. The engineer or surveyor will be closely associated and familiar with the construction staking. Periodic visits to the site may be required.

C. Construction stakes, reference points, and temporary bench marks shall be set in accordance with standard surveying practice and shall be utilized by the Contractor and the Owner to control structure location, lines and elevations and site grading features, such as grade breaks, drainages and elevations of subgrade and finish grade.

D. Accuracy Requirements:

1. Precision and accuracy of construction stakes shall be as follows:

a. Horizontal and vertical accuracy of slope stakes, and reference stakes:

(1). Slope stakes, reference points: 0.10 feet

(2) Centerline location, and stationing horizontal and vertical: 0.10 feet

(3) Structures and retaining walls – base elevation and horizontal position 0.05 feet

E. Vertical Control:

1. Existing bench marks shall be re-established outside construction limits for use as vertical grade control. Bench mark shall be permanent in nature and remain undisturbed during the construction work.

F. Slope Stakes and Topography:

1. Slope stake catchpoints and reference stakes shall be established to the precision stated above. Slope stakes shall be set at hinge points and angle points at the parking lot perimeter.

G. Approval:

1. Construction work shall not begin until all stakes, marks and controls established by the

Contractor have been reviewed and approved by the Contracting Officer.

Approval of the construction staking will not relieve the Contractor of the responsibility for maintaining the survey work and correcting errors. Stakes within construction limits will not require maintenance during construction.

H. Existing Monuments:

1. All bench marks, land corners, and triangulation points established by other surveys, existing within the construction area shall be preserved. If existing monuments interfere with the work, secure written permission before removing them.

I. Structures:

1. Staking for structure shall be provided by the location of one corner of the building, and the establishment of one outside wall line. These corner and line stakes shall also reference finish floor elevation. Reference stakes and elevation bench mark shall be set and maintained through the completion of site grading, structure foundation and finish floor construction.

1.3 MATERIALS TESTING:

A. Material sampling and gradations testing for submittals shall be the responsibility of the

Contractor. An independent testing laboratory or qualified materials technician shall be employed by the Contractor to perform materials testing or materials suppliers shall furnish certificates of compliance to project specifications.

B. Material samples for in-place densities and material control shall be the responsibility of the Contractor. Material gradations shall be submitted to the Contracting Officer for approval prior to placement of material. Material sampling shall be in accordance with the following schedule:

Subgrade beneath buildings: 95% of maximum density. Base beneath buildings: 95% of maximum density.

Subgrade beneath pavement: 95% of maximum density. Base beneath pavement 95% of maximum density.

PART 2 - PRODUCTS

Not Used.

PART 3 - EXECUTION

PART 4 - MEASUREMENT AND PAYMENT

4.1 FIELD ENGINEERING:

A. Construction staking includes all necessary labor, equipment, instruments, materials, supplies, transportation, and incidentals for completion of construction staking, maintenance of stakes during construction, and establishment of final finished grades. Measurement and payment for all field engineering activities shall be as shown in the Bid Schedule.

B. Construction staking will be considered incidental to the work for which field engineering is required. No separate measurement and payment shall be made for this work.

SECTION 012500

UTILITY COMPANY COORDINATION

PART 1 - GENERAL

1.1 SUMMARY

A. The work of this section consists of coordination with utility companies for connection to their systems.

B. Related work specified elsewhere

C. Section 015000 – Temporary Facilities and Controls

D. Section 017700 – Closeout Procedures

1.2 COORDINATION

A. Where work by a utility company is required in conjunction with construction, such as installation of cable by a utility company in a common trench with other utilities to be installed by the Contractor, the Contractor is solely responsible for contacting the utility company to coordinate any and all work required by the utility provider.

B. Payment to Utility Companies:

1. Any costs associated with utility installation as a component of construction, including, but not limited to, distribution lines, distribution equipment, and meter assemblies, will be the responsibility of the contractor. This does not include tap fees (See 3 below). All utility use charges associated with permanent utility installation shall be the responsibility of the Contractor until Substantial Completion.

2. At least two weeks prior to the anticipated date of Substantial Completion, prepare a written request to the Contracting Officer for all desired pertinent Government information for each utility, such as the billing name, billing address, and contact information. Once this information is furnished by the Government to the Contractor, the Contractor shall be responsible for contacting each utility company and changing the billing information to the name of the Government, with pertinent information as described above, on or after the date of Substantial Completion.

1.3 INSPECTION

1. Comply with utility company requirements for inspections before final connection is made.

1.4 PERMITS

A. Applications for utility connection permits will be completed by the Government. Copies will be provided to the Contractor.

PART 2 – PRODUCTS – NOT USED

PART 3 – EXECUTION – NOT USED

END OF SECTION 012500

SECTION 01300

SUBMITTALS

1.1 DESCRIPTION: The work of this section consists of submittal requirements before and during construction.

1.2 RELATED REQUIREMENTS: Closeout submittals - Section 01700.

1.3 PROPOSALS: Submittal of project proposals shall be as described in the

Request for Proposals and General Provisions. Proposals shall include:

A. Progress Schedule: Submit schedule of work (normally in bar chart form) showing estimated starting and completion dates for each part of the work.

B. Schedule of Values: Submit a schedule of dollar values for lump sum bid items based on the Contract Bid Schedule. Break down into component parts each bid item involving a series of operations for which progress payments may be requested. The total costs for the component parts shall equal the bid amount for that item, and the total cost of all items shall equal the contract sum. The Contracting Officer may request data to verify accuracy of dollar values. The Schedule of Values will form the basis for progress payments as provided for in the General Provisions.

1.4 SHOP DRAWINGS, PRODUCT DATA AND SAMPLES:

A. General Procedures:

1. As specified in the individual sections, forward submittals to the Contracting

Officer at least 15 days before need for approval. Unless a different number is specified, submit three copies of each shop drawing, two specimens of each sample, and three copies of all other submittals requested, all of which will be retained by the Contracting Officer. Submit any additional copies that are to be returned.

2. Coordinate all submittals and review them for legibility, accuracy, completeness, and compliance with contract requirements. Forward submittals that are related to or affect one another as a package to facilitate coordinated review.

3. List submittals on a transmittal letter with date of submittal and content of submittal. Transmittal letter shall be on Contractor’s letterhead or other approved format. All submittals shall be uniformly transmitted.

4. Submittals will not be accepted for review if an incorrect amount of submittals are submitted, the transmittal form is incorrectly filled out, submittals are not coordinated, or submittals do not show evidence of Contractor’s approval.

5. Specific Procedures:

1. Shop Drawings: Identify each copy of shop drawings with contract drawing number in lower right hand corner.

2. Samples: Samples shall be large enough to illustrate clearly the functional characteristics and full range of color, texture, or pattern.

3. Manufacturer’s Literature: Submit only pertinent pages; mark each copy of standard printed data to identify products referenced in specification section.

4. Materials: Submit Certificates of Compliance and mix designs for materials incorporated into the project. Materials include aggregates, Portland Cement concrete and asphalt concrete, as provided in these specifications.

5. Pre-engineered Metal Building: Submit in accordance with Section

13121.

C. Contracting Officer’s Review:

1. After approving submittals, Contracting Officer will return Contractor’s copies.

2. If submittals are not approved, Contracting Officer will return all copies to

Contractor with reasons for rejection. Resubmit, identifying changes.

3. Any work done before approval shall be at Contractor’s own risk.

1.5 APPROVED EQUALS AND SUBSTITUTIONS:

A. For each item proposed as an ‘approved equal’, submit a separate request. With each request, submit supporting data, including:

1. Drawings and samples as appropriate.

2. Comparison of the qualities of the proposed item with that specified.

3. Changes required in other elements of the work because of the substitution.

4. Name, address and telephone number of vendor.

5. Manufacturer’s literature regarding installation, operation and maintenance, including schematics for electrical and hydraulic systems, lubrication requirements, and parts lists. Describe availability of maintenance service, and state source of replacement materials.

B. A request for approval constitutes a representation that the contractor:

1. Has investigated the proposed item and determined that it is equal or superior in all respects to that specified.

2. Will provide the same warranties for the proposed item as for the item specified.

3. Has determined that the proposed item is compatible with interfacing items.

4. Will coordinate the installation of an approved item and make all changes required in other elements of the work because of the substitution.

5. Waives all claims for additional expenses that may be incurred as a result of the substitution.

C. New Construction Materials: The Contractor is encouraged to submit for approval products made out of recycled or environmentally-responsible material.

1.6 MANUFACTURER’S INSTALLATION INSTRUCTIONS: When contract documents require compliance with manufacturer’s printed instructions, provide one complete set of instructions for the Contracting Officer and keep another complete set of instructions at the project site until substantial completion.

4.1 SUBMITTALS: Payment will be included in the bid schedule for which this work relates. No separate measurement and payment shall be made.

SECTION 01530

BARRIERS

1.1 DESCRIPTION: The work of this section consists of furnishing, installing and maintaining barriers to protect existing facilities and the public from construction operations, when construction zones remain open for public use.

2.1 GENERAL: Material may be new or used, but shall be suitable for intended purpose. Fences and barriers shall be structurally adequate and neat in appearance.

2.2 BARRICADES AND SIGNS: Manual on Uniform Traffic Control Devices (MUTCD 2009 edition with revision number 1 and 2 incorporated, dated May 2012.

2.3 LUMBER: Free of nails, large knot holes and splinters.

2.4 BARRIER TAPE: Banner Guard, imprinted with ‘CAUTION: CONSTRUCTION

AREA’, manufactured by Reef Industries, Inc., Houston, Texas, or approved equal.

3.1 PROTECTION OF PUBLIC:

A. Fence, barricade, or otherwise block off the immediate work area to prevent unauthorized entry.

B. Erect and maintain barricades, lights, danger signals, and warning signs in accordance with MUTCD-2009 with revision number 1 and 2 incorporated, dated May 2012.

C. Illuminate barricades and obstructions at night; keep safety lights burning from sunset to sunrise.

D. Adequately barricade and post open cuts in or adjacent to thoroughfares.

E. Protect pedestrian traffic by guardrails or fences.

F. When pedestrian traffic is detoured onto a roadway, provide temporary walkways with protection as required at ends and overhead. For walkways, use lumber running parallel to direction of traffic movement and provide ramps at changes of elevation.

G. Cover pipes, hoses and power lines crossing sidewalks and walkways with troughs using beveled edge boards.

H. Erect and maintain sufficient detour signs at road closures and along detour routes.

3.2 BARRIER TAPE: Install where directed by the Contracting Officer. Keep a minimum of two rolls on site at all times.

3.3 REMOVAL: Completely remove barriers no longer needed when approved by the Contracting Officer.

4.1 BARRIERS: Payment shall be included as incidental to work requiring barriers. No separate measurement and payment will be made.

SECTION 01600

MATERIAL AND EQUIPMENT

1.1 DESCRIPTION: The work of this section consists of the general procedures for handling, storing, and protecting material and equipment.

1.2 TRANSPORTATION AND HANDLING: Arrange deliveries of materials in accordance with construction schedules; coordinate to avoid conflict with work and conditions at the site. Deliver materials in undamaged condition, in manufacturer’s original containers or packaging, with identifying labels intact and legible. Contractor is encouraged to obtain materials in biodegradable or recyclable/reusable packaging, which uses the minimum amount of packaging possible.

1.3 STORAGE AND PROTECTION: Store materials in accordance with manufacturer’s instructions, with seals and labels accessible for inspection.

Confine all on-site storage to designated areas within project limits.

A. Interior Storage: Maintain temperature and humidity within the ranges required by manufacturer’s instructions.

B. Exterior Storage:

1. Store products subject to damage by the elements in weather-tight enclosures.

2. Store fabricated products above the ground, on blocking or skids; prevent soiling or staining. Cover products subject to damage or deterioration with impervious sheet coverings; provide adequate ventilation to avoid condensation.

3. Store loose granular materials in a well-drained area on solid surfaces to prevent mixing with foreign matter.

C. Protection After Installation: Provide adequate coverings as necessary to protect installed materials from damage resulting from natural elements, traffic, and subsequent construction. Remove when no longer needed.

4.1 MATERIAL AND EQUIPMENT: Payment will be included in the bid schedule for which this work relates. No separate measurement and payment will be made.

SECTION 01700

PROJECT CLOSEOUT

1.1 DESCRIPTION: The work of this section consists of final clean-up, closeout submittals, and final inspection procedures.

2.1 CLEANING MATERIALS: As recommended by the manufacturer of surface to be cleaned.

2.2 OPERATING INSTRUCTIONS: Place operating instructions in convenient location on or adjacent to the equipment, as approved by the Contracting Officer. In areas where operating instructions are subject to sunlight or moisture, provide weather-resisting materials.

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, 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 conventional drafting standards to show actual construction conditions. Show additions in red, deletions in green and special instructions in black.

B. Keep record drawings current. Inspection will be made monthly. Certification of accuracy and completeness will be required on monthly payment requisitions.

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. Keys and Keying Schedule: Submit all keys including duplicates. Wire all keys for each lock securely together. Tag and plainly mark with lock number, equipment identification, or panel or switch number and indicate location, such as building and room name or number. Where special keying is required, lockset cylinders shall be supplied by the Owner.

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. The Contracting Officer will make an inspection within 10 days of receipt of request.

A. When work is determined to be substantially complete, the 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, the Contracting Officer will notify the Contractor in writing. After completing work, the 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.

4.1 CONTRACT CLOSEOUT: Payment will be included in the bid schedule for which this work relates. No separate measurement and payment shall be made.

SECTION 01900

MOBILIZATION

1.1 DESCRIPTION: This work shall include 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 prior to beginning work on various items on the project. This work also includes bonding costs.

PART 2 – PRODUCTS

Not used.

PART 3 – EXECUTION

Not used.

PART 4 – MEASUREMENT AND PAYMENT

4.1 MEASUREMENT: Shall be lump sum for the job.

4.2 PAYMENT: Progress payments shall be made as follows:

A. 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.

B. 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.

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

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

SECTION 02200

BUILDING DEMOLITION

A. Work included in this section covers complete removal of the existing storage building, flammable building, small storage building #1 & #2 , south grain building and north grain building (see sheet 5 for buildings details); and removal of the substructure for the service building (concrete slab to remain).

B. See attached envirinmental reports for asbestos and lead information. .

PART 2 – PRODUCTS

A. None

A. Provide asbestos and lead paint removal plan.

B. Asbestos shall be removed and disposed of in accordance with regulations by a certified contractor.

C. Disconnect electrical service to building prior to demolition.

D. The Forest Service reserves the right to remove and retain ownership of any equipment from the buildings prior to a date agreed to by the Contractor and the Contracting Officer.

E. Dispose of all refuse at a State Approved facility.

SECTION 02210

SITE GRADING

1.1 SECTION INCLUDES:

A. Provide all labor, material, equipment and services required for and/or reasonably incidental to the completion of the following work. Includes all such work shown on the drawings and/or listed below.

1. Removal from the site and disposal of all clearing and debris, unusable or excess materials, except as may be specified to be stockpiled for use by the Owner.

2. All on-site excavation, cut and fill operations.

3. Excavation and compacted fill under building, roadway and parking lot.

4. Dust control as required to prevent dust nuisance on or about the site or borrow site.

5. Remove or abandon any subsurface structures such as waterlines, sewer lines, storm drains, etc., not incorporated in the final development.

6. Backfill of depressions resulting from the removal of surface and subsurface structures.

7. Sub-grade scarification and compaction under pavement areas.

8. Removal and disposal of abandoned existing buried utility lines, septic tank, and/or foundations found on site. Disposal of clean fill material shall be at the designated disposal site. Disposal of other construction debris shall be in accordance with County ordinances and local regulations.

1.2 RELATED SECTIONS

A. Section 01050 – Field Engineering.

B. Section 02221 – Utility Trenching and Backfill.

C. Section 02232 – Aggregate Base Course.

1.3 QUALITY ASSURANCE

A. A qualified Engineer shall be employed by the Contractor to perform all required tests of fill and of soil compaction, and for observation of the earthwork. The Contractor shall notify the Contracting Officer at least 24 hours prior to completion of each lift and phase of the work in order to permit him to review tests, as required. Certificates of Compliance for all imported fill materials proposed for use shall be delivered to the

Contracting Officer at least five (5) days prior to the time that such materials are expected to be placed in the work. No import fill materials shall be placed until receipt of written approval of samples and all materials used shall be the same as those in the samples submitted. Any fill that does not meet the specification requirements shall be removed or otherwise corrected as he directs.

1.4 GUARANTEES:

A. The Contractor guarantees all of the work under this section to be free of defects of any kind, whether due to workmanship or materials, for a period of one (1) year from the time of final completion of the project. Written guarantees are not required;

Contractor and Subcontractors under this Section shall, by beginning the work, be considered to have agreed to this guarantee.

2.1 ENGINEERED FILL:

A. All fill soils should be essentially free of organic debris, less than three inches (3”) in maximum dimension with about 15 to 70 percent passing the No. 200 sieve, evenly graded, and with low plasticity (i.e. plasticity index less than 12; liquid limit less than 30). On-site soils free of organic debris may be reused as fill materials. All imported fill materials should be samples, tested and approved by the Engineer prior to being transported to the site.

Engineered fill soils meeting the criteria above should be moisture conditioned to near the optimum moisture content, placed in horizontal lifts less than eight inches (8”) in loose thickness, and compacted to at least 95 percent relative compaction.

2.2 TRENCH BACKFILL:

A. Trench backfill shall conform to the requirements of Section 02221.

3.1 CLEARING AND GRUBBING:

A. Prior to general site grading, existing vegetation and any debris should be stripped and disposed of as designated. Stripped topsoil may be stockpiled and reused for landscape purposes; however, it shall not be incorporated into any engineered fill without written approval of the Contracting Officer.

3.2 EXISTING, BURIED UTILITIES:

A. Existing utility lines, septic tanks, cesspools, and/or foundations found on site shall be removed and disposed of offsite or abandoned in place as shown on plans or directed by the Engineer.

3.3 SCARIFICATION AND COMPACTION:

A. Following site stripping and any required over-excavation, all areas to receive fill or to be used for the future support of structures, concrete slabs supported on grade or pavements, to be scarified to a depth of eight inches (8”), uniformly moisture conditioned to near optimum moisture content, and compacted to minimum 95 percent of the maximum dry density for embankments and 95 percent for building pads and foundations, as determined by ASTM Test Method D 1557.

3.4 CLEAN UP:

A. Perform the work under this Section so as to keep affected portions of the building and site neat, clean and orderly. Upon completion of the work under this Section, remove immediately all surplus materials, rubbish and equipment associated with or used in the performance of this work. Failure to perform such clean-up operations within 24 hours of notice by the Owner or Contracting Officer shall be considered adequate grounds for having the work done by others at the Contractor’s expense.

PART 4 MEASUREMENT AND PAYMENT

4.1 PAYMENT:

A. Payment shall be included in the Bid Schedule under ‘Site Grading and

Compacting’.

4.2 MEASUREMENT:

A. Measurement shall include all excavation grading, and embankment necessary to achieve subgrade elevations to the dimensions shown on the plans. All excavation is considered common unless otherwise specified. Measurement shall be as follows:

1. Site grading and compacting..................................................Lump Sum

2. Structure excavation. No separate measurement or payment shall be made.

SECTION 02221

UTILITY TRENCHING AND BACKFILLING

1.1 DESCRIPTION: The work of this section consists of trenching and backfilling for the construction and installation of pipelines, culverts, conduits and cables. All trenching will be open cut, except as specified in the drawings.

1.2 DEFINITION: Materials used in backfill and bedding, as shown in trench details, are defined as follows:

A. Bedding and Backfill: 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, meeting the requirements of paragraph 3.4. 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.

1.3 QUALITY ASSURANCE:

A. All material gradation analysis shall be accomplished by an independent testing lab arranged and paid for by the Contractor, in accordance with Section 01050.

B. All references to percent of maximum density shall be as determined by ASTM D1557, Method C, at a moisture content determined to be suitable for such density.

Moisture-density curves shall be prepared in a certified soils testing laboratory.

C. In-Place Soil Density Testing: Procedures used 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). Testing shall be in accordance with Section 01050.

Test locations will be selected at the discretion of the Contracting Officer.

1.4 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.

1.5 EXCAVATION CLASSIFICATION: Regardless of the nature of material excavated, all excavation will be considered unclassified.

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 by the Contracting Officer.

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 work relates, and in accordance with Paragraph 3.4 of this section.

2.3 UTILITY LINE MARKING: All utilities shall be marked for location and identified by marking tapes, as specified in Section 02229.

3.1 TRENCH CLEARING:

A. The maximum width of clearing for utility trenches shall be 10 feet unless otherwise directed by the Contracting Officer. Trench spoils shall not be placed over or around uncleared vegetation unless specifically approved by the Contracting Officer.

3.2 TRENCH EXCAVATION:

A. All excavations must comply with the current requirements of Colorado/OSHA.

Additionally, all cuts greater than five feet (5’) in depth and involving personnel within the excavation should be sloped and/or shored. Temporary excavations to ten feet (10’) below surrounding grade may be sloped at ¾(h):1(v) or flatter. Flatter slopes will be required if clean/or loose sandy soils are encountered along the slope face. Temporary excavations adjacent to existing footings should not extend below a plane projected downward at a 45-degree angle from the closest edge of the footing.

1. Paved Areas: Areas paved with asphalt or concrete shall be marked for alignment and trench width. Asphalt and concrete paving, or sidewalks, shall be cut with a saw in neat parallel lines. The cut lines shall be at least 6” outside each edge of the trench width to prevent over-breaking and cracking of the paved surfaces.

2. Trench Configuration: Trench locations shall be marked on the ground prior to excavation. The trench shall be excavated to allow the pipe to be aligned in the approximate center. Trench widths shall permit the pipe to be laid and joined properly and to allow for proper placement and compaction of backfill material.

In no case shall the trench width be less than the pipe O.D. plus 16 inches. The trench side walls shall be as near vertical as possible, except where sloping is permitted by the Contracting Officer or required by OSHA standards. The trench bottom shall provide a firm, uniform and continuous bedding for the pipe. Properly sized and placed bell holes shall be provided at each joint.

Mounding of trench bottom to support pipe will not be allowed.

3. Stockpiling: The Contractor shall exercise caution in stockpiling excavated and import materials so as not to interfere with public traffic and so as to maintain a clear distance from the trench sufficient to prevent collapse of the trench wall.

4. Underground Facilities: The Contractor shall proceed with caution in excavation and preparation of the trench so that the exact location of all underground facilities may be determined. It shall be the Contractor’s responsibility to locate and protect all existing underground utilities. All damage to underground facilities due to the failure of the Contractor to have the facilities located or due to carelessness in excavation after the facilities are located, shall be the Contractor’s responsibility. Location of existing underground facilities on the plans or in the field does not relieve the Contractor of his responsibility to determine their exact location.

5. Over Excavation: Trenches for all types of PVC pipeline materials shall be over excavated to provide for a minimum 6-inch sand (class 1) bedding.

Trenches for ductile iron pipe shall be over excavated by a minimum of 6 inches in areas of rock, hardpan, shale or other unsuitable bedding materials, all as shown on the plans.

Trenches in areas of underground water shall be over excavated to allow for 6 inches or more of permeable backfill, as required for Pipe Trench Backfill, as described elsewhere in this section.

Any areas of trench over excavated beyond the lines and grades shown on the plans or specified herein shall be brought back up to proper grade using suitable materials as approved by the Contracting Officer. This material shall be compacted to the specified degree prior to placing any pipe or sand bedding in the trench.

6. Ground Water and Unsuitable Material: Material taken from excavations where excessive ground water or surface water or other sources of water have rendered the soil material unsuitable for trench backfill material shall be removed from the site and replaced with suitable material. The over- wet material may, at the Contractor’s option, be dried to a proper moisture content and reused in the work, provided the material meets all other requirements of these specifications.

3.3 SHORING AND SHEETING:

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

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

C. Remove all other sheeting and shoring when safe to do so.

3.4 BACKFILLING:

A. Backfill Selection:

1. Native material removed from the trench may be used for backfill material provided it meets all of the requirements set forth on the plans and in these specifications. Native backfill material may be mechanically screened to meet these requirements. Materials excavated from the trench which are found to be excess, and materials found to be unsuitable for trench backfill shall be disposed of in a manner described elsewhere in this section.

2. The Contractor shall import the type and quantities of backfill materials not found on the job site at his own cost. The Contractor shall provide the equipment and materials necessary to collect samples of the native materials and proposed import material for testing, all as directed by the Contracting Officer.

B. Pipe Bedding and Backfill:

1. Class 1 Material: Three types of materials are acceptable for pipe bedding and envelope; 1) naturally occurring rounded sand, 2) crushed sand, 3) decomposed granite. All material shall be free from clay, organic, or other deleterious material, shall have a sand equivalent of at least 50, and shall meet the following percent passing by weight gradations:

Sieve Size

Natural Sand

Crushed Sand

Decomposed Granite

1-1/2” 100 ---

3/4” 75-100 100 100 No. 4 55-100 75-100 75-100 No. 200 0-5 0-15 0-5

2. Class 2 Material: Select excavated earth, free from stones or lumps exceeding 1” in greatest dimension, vegetative matter, or other deleterious material.

3. Class 3 Material: Aggregate base course material conforming to the requirements of Section 02232.

4. Class 4 Material: Select excavated earth, free from stones or lumps exceeding

4” in greatest dimension, vegetable matter or other deleterious material.

5. Permeable Backfill Material: Hard, durable, clean gravel or crushed stone, free from organic material, clay balls, or other deleterious substance, conforming to one of the following grades:

Percentage Passing

Sieve Size 1/2” 1-1/2” 2” -- 100 1-1/2” -- 95-100 3/4” 100 50-100 1/2” 95-100 3/8” 70-100 13-55 No. 4 0-55 0-25 No. 8 9-10 0-5 No. 200 0-3 0-3

6. Sand-Cement Slurry Backfill Material: Sand-cement slurry shall consist of washed sand, free from clay and organic material of which 100% will pass a 3/4” screen, at least 75% will pass a No. 4 sieve and no more than 5% will pass a No.

200 sieve. The sand shall be mixed thoroughly with Type 1 or 2 cement, at a ratio of 1-1/2 sacks per cubic yard of sand and enough water to accommodate mixing and placing, but not more than will allow a 4” compacting replacement asphalt.

C. Backfilling Operations:

1. Native and imported backfill material shall be screened or otherwise prepared before placing the material in the trench. Backfill material shall be at or near optimum moisture content. Excessive moisture must be removed by windrowing and air drying. Dry soils shall be moistened and thoroughly mixed.

2. Compaction: Use vibratory compactors for sands and gravel (non- cohesive soils). Use mechanical tampers for sand and gravel containing a significant portion of fine-grained material, such as silt and clay (cohesive soils). Hand tamp around pipe or cable to protect the lines until adequate cushion is attained.

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

3. Bedding: Compact the specified material to 95 percent of maximum density to the finished utility grade.

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

5. Select Backfill: Fill by hand placement around the utility to just over half depth, and compact in a manner to ensure against lateral or vertical displacement. Place select backfill to 12 inches above the utility line by hand placement in not more than 6-inch layers. Compact each layer to 95 percent of maximum density.

D. Sand-Cement Slurry Backfill:

1. All water main and service line crossings under existing paved roadways shall be backfilled from 6” above the pipe to the underside of the replacement paving with sand-cement slurry, except as shown otherwise on the plans. The pipeline shall be bedded and backfilled to 6” above the pipe with Class 1 material prior to placing the sand-cement slurry.

2. All pipe trench which requires tunneling under features such as walks, curbs, retaining walls, or other rigid or concrete features, shall be backfilled with sand-cement slurry from within 6” of the top of the pipe to up underneath, and if necessary, around the bottom of the feature so as to provide adequate support.

3.5 SURFACE FINISH WORK:

A. Paved Areas: Replace removed paving and base course with new material of equal or better quality and of the same texture and color as the adjacent paved areas. Saw cut pavement edge to a true line and broom as needed prior to paving.

B. Open Areas: Grade all disturbed areas to a finish ordinarily obtained from a blade grader, with no abrupt changes in grade or irregularities that will hold water.

C. Drainage Ditches: Restore drainage ditches to appropriate line and grade, using surface erosion-prevention techniques approved by the Contracting Officer.

D. Clean-Up: Prior to final inspection and acceptance, remove all rubbish and excess material for disposal as approved, and leave area in a neat, satisfactory condition.

4.1 UTILITY TRENCHING AND BACKFILLING: Payment will be included in the Bid Schedule under Utility System Installed, and will include trench excavation, pipe fittings, valves, boxes, conduit, bedding, and backfill, patching and surface finish, for the completed installation.

4.2 MEASUREMENT: Measurement shall be as shown for all trenching regardless of utility placed. Multiple utilities placed in common trenches shall be measured and paid for under the utility being placed.

SECTION 02229

UTILITY LINE MARKING

1.1 DESCRIPTION: The work of this section consists of furnishing and installing utility line marking.

1.2 SUBMITTALS: As specified in Section 01300.

A. Samples: 24-inch strips of tape and two markers.

B. Certification that the materials used in the tape fabrication meet the requirements of this section.

2.1 MARKING TAPE: Capable of being inductively detected electronically.

A. Construction: Metallic foil laminated between two layers of impervious plastic film not less than 3 inches wide. Total thickness of tape shall not be less than

0.005 inch (5 mil) plus or minus 10 percent manufacturing tolerances.

1. Film: Inert plastic. Each film layer shall be not less than 0.0005 inch thick

(0.5 mil).

2. Foil: Not less than 0.00035 inch thick (0.035 mil).

3. Adhesive: Compatible with foil and film.

B. Imprint: 3/4-inch or larger bold black letters.

C. Legend: Identify buried utility line tape with imprint such as ‘Caution: Sewer Line Below’. Repeat identification at approximately 24-inch intervals.

D. Background Color: APWA color code and as specified below:

Color Utility

Safety Red Electric Safety Precaution Blue Water System Safety Green Sanitary Sewer, Storm Drain Safety Yellow Gas Lines Safety Orange Communication (telephone)

E. Manufacturer: Lineguard, Inc., Wheaton, Illinois; Allen Systems, Inc.; Thor

Enterprises, Inc., Sun Prairie, Wisconsin; or approved equal.

3.1 MARKING TAPE:

A. Install tape in backfill directly over each buried utility line as shown on the drawings. Place tape during final backfilling.

B. Where utilities are buried in a common trench, identify each line by a separate warning tape. Bury tapes side by side directly over the applicable line.

4.1 UTILITY LINE MARKING: Payment will be included in the bid schedule for which this work relates.

SECTION 02232

AGGREGATE BASE COURSE

1.1 DESCRIPTION: The work of this section consists of furnishing and placing aggregate base course, and filler if required, on a prepared subgrade.

A. If materials are obtained from a commercial source, submit certification from the supplier certifying that aggregate base course meets the requirements of this section.

1.3 QUALITY ASSURANCE: Material testing required to determine compliance with the requirements for the work of this section will be the responsibility of the Contractor.

2.1 AGGREGATE: Clean, hard, durable fragments or particles of crushed stone, or crushed or natural gravel and shall meet the following requirements:

A. Gradation: The aggregate shall be 3/4” maximum and shall conform to requirements of Standard Specification (Cal Trans) Section 26 for Class 2 base:

Sieve Size Percent Passing

1” 100 3/4” 87-100 No. 4 30-65 No. 30 5-35 No. 200 0-12

B. Quality Requirements: The material shall conform to the following:

Test Test Method No. Requirement

R-Valve Calif. 301 78 Min.

Sand Equivalent Calif. 217 50 Min.

Durability Index 35 Min.

3.1 PLACING: If the required compacted depth of the aggregate base course exceeds 6 inches, place course in two or more layers of approximately equal thickness. The maximum compacted thickness of any one layer shall not exceed 6 inches.

3.2 COMPACTION: Compact each layer to a density of not less than 95 percent of the maximum density, as determined by AASHTO T180-74. Random tests for compacted depth will be made during the progress of the work.

3.3 SURFACE FINISHING:

A. Use a smooth steel wheel roller for the final rolling of top surface base course. Water surface and evenly spread loose stones before final rolling. Make minimum of two complete passes over area to embed stones. Correct soft spots developed during rolling.

B. Compacted base course surface shall be smooth, free from waves and other irregularities, and to grade elevations as shown on the drawings. Unsatisfactory portions of base course shall be removed, reworked, re-laid and re-rolled at no additional expense to the Owner.

3.4 MATERIAL ACCEPTANCE REQUIREMENTS: Acceptance will be based on periodic samples and tests taken following mixing and before laying.

3.5 TOLERANCES:

A. Surface: The Contracting Officer will test finished surface of the base course with a 10-foot straightedge or other device. The variation between any two flat plane contacts with the surface shall not exceed one inch. Any areas not complying with these tolerances shall be reworked to obtain conformity.

B. Width: Plan dimension, plus or minus .5 foot.

C. Thickness: Plan dimension, plus or minus .05 foot.

3.6 MAINTENANCE: Maintain base course in a satisfactory condition until surfaced or until final acceptance.

4.1 AGGREGATE BASE COURSE: Payment shall be included in the bid schedule under ‘aggregate base course’. Measurement shall be by the square foot of aggregate surface for roads and parking to the specified depth. Incidental aggregate for building pads, trenches, and backfill shall be included in the item to which it relates. No separate measurement and payment shall be made.

SECTION 02601

TESTING OF GRAVITY SEWER LINES

1.1 DESCRIPTION:

A. The work of this section consists of leak testing gravity and pressure sewer lines and related valves and fittings. Rejected work shall be re-tested at the Contractor’s expense.

B. Testing Methods: Gravity sewer lines - air test; pressure sewer lines - high pressure water test.

1.2 QUALITY ASSURANCE:

A. Flow meters shall record the actual volume plus or minus 2 percent.

B. Air test…