Attachment 3 Specifications - 1240LU23Q0074 GAOA SZ Toilet Decomm and Install.docx

Appendix A

SZ TOILET DECOMMISSION AND INSTALLATION PROJECT

NEZ PERCE-CLEARWATER NATIONAL FORESTS

IDAHO COUNTY

SPECIFICATION INDEX

DIVISION 1 – GENERAL REQUIREMENTS

01010 – PROJECT LOCATION

A. General: The project work will be in (2) locations. Site locations are shown on the drawings.

1. MEADOW CREEK CAMPGROUND (45.828688°, -115.928237°) – found on the Salmon River Ranger District of the Nez Perce – Clearwater National Forests. This area is located approximately 26 miles southeast of Grangeville, Idaho on Hwy 14. From Grangeville travel east on U.S. Highway 13 about 31 miles to the site.

2. NORTH FORK SLATE CREEK CAMPGROUND (45.639374°, -116.120238°) - found on the Salmon River Ranger District of the Nez Perce – Clearwater National Forests. This area is located approximately 9 miles east of Slate Creek Ranger Station on NFSR #354. From Grangeville travel south on U.S. Highway 95 to NFSR 354 travel 9 miles to North Fork Slate Creek Campground.

01011 – SUMMARY OF WORK

A. General The following work items will be included in the overall project: Decommission and dispose of (2) existing toilet structures, prepare site for new pre-cast single vault unisex concrete toilet, coordinate delivery schedule with manufacturer, and complete installation of (2) pre-cast concrete vault toilets.

Work Description by Site:

1. Meadow Creek Campground - Work includes removal of the existing concrete single vault toilet structure, removal of any concrete materials and removal of any other materials so a new toilet can be delivered and placed in the same location. Work would include pumping the existing toilet unit of any waste materials prior to removing the vault; dismantling and removing the concrete single vault toilet unit; installing erosion control if needed, preparing the excavation area for the new vault toilet including a level subgrade with aggregate leveling course; coordinating the schedule and delivery of the new concrete vault toilet with manufacturer and finally backfilling and finishing site work after the vault toilet is delivered and placed in the site. Final vault installation work shall include any required excavation work to accommodate the new unit, backfilling after the unit is set, and construction of gravel apron and concrete entrance pad. When all installation work is complete, remove erosion control, and complete final dressing of site to remove evidence of excavation work.

2. North Fork Slate Creek Campground - Work includes removal of the existing wood frame double vault toilet structure, removal of any concrete materials and removal of any other materials so a new toilet can be delivered and placed in the same location. Work would include pumping the existing toilet unit of any waste materials prior to removing the vault; dismantling and removing the wood frame toilet unit; installing erosion control, preparing the excavation area for the new vault toilet including a level subgrade; coordinating the schedule and delivery of the new concrete vault toilet with manufacturer and finally backfilling and finishing site work after the vault toilet is delivered and placed in the site. Final vault installation work shall include any required excavation work to accommodate the new unit, backfilling after the unit is set, and construction of gravel apron and concrete entrance pad. When all installation work is complete, remove erosion control, and complete final dressing of site to remove evidence of excavation work.

01012 – START WORK

It is estimated that work will begin approximately August 01, 2023, for both sites.

01013 – CONTRACT TIME

It is anticipated that work will begin on August 01, 2023, and contract time will end October 31, 2023.

01016 – CONTRACTOR’S USE OF THE WORK SITE

Contractor will not be allowed to camp at or adjacent to project site. Coordinate with Contracting Officer to locate an approved storage/camping location.

01017 – SCHEDULES

Furnish three copies each of the following items after award of contract for review and/or approval pursuant to the contract.

· Proposed progress schedule showing starting and completion dates of the various phases of work.

· List of proposed subcontractors must have Contracting Officer’s written approval prior to work on the project.

01031 – GRADES LINES AND LEVELS

Contractor shall verify all quantities, volumes, and lengths.

01050 – COORDINATION

A. General Contractor shall coordinate with the Contracting Officer to schedule site closures and for any other activities that need to occur prior to completion of the work.

1. Coordination will be required with toilet manufacturer to schedule time and date of toilet delivery/ placement. This information shall be provided to Contracting Officer 14 days prior to delivery.

2. Contractor shall provide appropriate traffic control, signing, barricades, site closures and/or any other systems necessary to ensure public safety. Any open excavation work will require fencing completely surrounding opening. Coordinate any site closures with Contracting Officer.

3. Coordination will be required with District personnel prior to any excavation work to assure that heritage resource personnel are on site during excavation.

4. Coordination will be required with District personnel prior to any excavation work to assure the public safety and provide adequate time to close the site 30 days prior to excavation.

01400 – QUALITY CONTROL AND QUANTITY MEASUREMENT

A. General Work shall consist of providing quality control in conformance with the 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 specification. The Contractor shall provide all personnel and reports necessary to meet the requirements of this specification.

B. Execution

1. Quality control and Quantity measurement system. 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.

2. The Contractor shall also perform, or cause to be performed, all measurement of quantities of materials incorporated into the work or work processes that are to be measured under the provisions of the contract.

C. Measurement and Payment

1. Method. There will be no separate measurement for this section.

2. Quality control and quantity measurement shall be incidental to other specified work.

01500 – TEMPORARY FACILITIES

A. General

1. Temporary Electricity: Power is not available at any of the sites.

2. Temporary Water: There will not be water available at the work sites. Contractor will be responsible for providing water at sites if needed.

3. Temporary Sanitary Facilities: Contractor shall provide approved temporary sanitation facilities for workers on project sites.

01530 – BARRIERS

Contractor will erect adequate barriers around all work sites for the protection of visitors who may be in the area. Once the toilet unit has been removed any open excavation shall be fenced using standard construction fencing. This fencing must be maintained until the new toilet unit has been installed and excavation work is complete.

01532 – TREE AND PLANT PROTECTION

Contractor shall make every effort to protect trees outside the construction limits as well as those identified as save trees. Construct protective barriers around save trees where necessary. Trees that are damaged shall be painted with tree wound dressing on all cuts and wounds.

01550 – ACCESS ROADS AND PARKING AREAS

A. Access

1. Contractor shall be responsible for maintaining and restoring access ways to and at the work site. If damage occurs to the existing roadways, as a result of the Contractor’s actions, the Contractor shall restore the roadways to the condition prior to the start of work.

B. Parking

1. Parking is available at the construction site at designated areas approved by the Contracting Officer.

01551 – STORAGE OF MATERIALS

The Contractor will be allowed to store materials at the project site under construction. Coordinate the location of the storage area with the Contracting Officer. Materials subject to damage from the weather shall be adequately protected by the Contractor. The Contractor will be solely responsible for the loss of or damage to materials stored at the job site.

01700 – PROJECT CLOSEOUT

A. Cleaning

1. In addition to keeping trash around the work areas picked up daily, Contractor shall pick up and remove all trash from in and around the work areas before final acceptance.

B. Painting

1. All areas that have been painted must be cleaned if any spillage occurs.

01800 – MEASUREMENT AND PAYMENT

A. Description

1. 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 and included in the payment of the pay items in the Schedule of Items.

2. Method of Measurement – The following methods of measurement are used to determine contract quantities for payment.

3. Structures will be measured according to neat lines shown on the Drawings or as altered by the Contracting Officer (CO) in writing to fit field conditions.

B. Units of Measurement

1. Payment will be units defined and determined according to US Standard Measure and by the following:

a. Each - One complete unit which may consist of one or more parts.

b. Payment - One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item.

c. Actual Quantities (AQ) – These quantities are determined from measurements of completed work.

d. Lump Sum Quantities (LSQ) – These quantities denote one complete unit of work as required by or described in the contract, including, necessary materials, equipment, and labor to complete the job. They will not be measured.

DIVISION 2 – SITE WORK

02000 – MOBILIZATION

A. General

1. Description – This work shall consist of preparatory work and operations for the movement of personnel, equipment, and incidentals to the project sites, and 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 sites.

B. Products – Not used.

C. Execution – Not used.

D. Measurement and Payment

1. Method - The method of measurement, as described in Section 01800, will be designated in the Schedule of Items.

2. Basis - Mobilization will be paid for at the contract unit price for the item as shown in the Schedule of Items.

3. Progress payment will be made as follows:

a. When 5 percent 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.

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

Payment will be made under:

02020 – REMOVAL AND DISPOSAL OF EXISTING VAULT TOILET STRUCTURES

A. General

1. This item shall consist of removal and disposal of all members and materials comprising an existing vault toilet structure at the locations designated in accordance with these specifications.

a. For all toilets to be replaced, the existing toilet must be pumped and then removed. This work is incidental to the overall toilet replacement and will not be paid as a separate item.

B. Products – Not used

C. Execution

1. Vault Toilet Unit Removal Preparation

a. All human waste contained in the vault toilet units must be removed by the contractor prior to vault removal, except where indicated in the work description.

b. The toilet shall be pumped by a commercial hauler with equipment for pumping and hauling human waste. Hauler shall have the necessary equipment to add water to the tank and break up solids in order to pump waste.

c. Disposal of vault waste shall be at any sewage treatment facility approved by the State Department of Health. The Contractor shall be responsible to obtain permission to dump the waste in the treatment facilities and pay any fees required.

2. Vault Toilet Unit Removal

a. The Contractor may use any means he may elect to remove the structure as long as he provides for the safety of the public and preservation of existing vegetation.

b. Over-excavation of the vault area will not be permitted.

c. The concrete in existing vault foundation and floor shall be broken into sufficiently small pieces to enable handling and disposed of as directed.

3. Disposal of Material

a. Unless specifically directed in writing, no attempt will be made to salvage for reuse any of the materials comprising the existing structure.

b. All wooden, concrete, fiberglass and metal materials shall be removed from the site and disposed of in a legal manner off of National Forest lands.

4. Measurement and Payment

a. Measurement – The method of measurement described in Section 01800, will be designated in the Schedule of Items for units designated for decommissioning only. This work shall include removal and backfilling of the excavation site.

b. Payment – Toilet removal work on the toilet being replaced is incidental to and included in the payment of other items of work.

Payment will be made under:

02135 – WASTE MATERIAL DISPOSAL

A. General

1. This item shall consist of loading, handling, transporting, and placing of excess excavation earthen material and clearing debris.

2. The waste disposal area shall be designated by the Contracting Officer.

B. Execution

1. All excavated material not used in backfilling of vault toilets and walkways, along with clearing debris and other refuse generated, shall be hauled to the designated disposal area within 5 miles of the site.

2. The size and shape of the piled waste material shall be designated by the Contracting Officer.

C. Measurement and Payment

1. There shall be no separated payment for work required under this section. Payment is incidental to and included in the payment of other items of work.

02222 – STRUCTURAL EXCAVATION, BACKFILL, AND COMPACTION

A. General

1. Contractor shall provide all labor, tools, and equipment necessary to excavate for toilet installation and compaction under slabs.

2. All surplus excavation shall be disposed of in accordance with Section 02135 or as designated by the Contracting Officer.

3. Contractor shall remove all unsuitable material under the slab and toilets including materials not meeting compaction requirements below and backfill with suitable material.

4. Contractor shall supply any additional suitable backfill and/or topsoil necessary from sources approved by Contracting Officer.

5. Borrow material can be used that is conserved from toilet excavation if approved by the Contracting Officer.

B. Fill Material

1. Common Fill:

a. The material for the interior and exterior fills shall consist of a mixture of soil, gravel, disintegrated granite, or other suitable material.

b. The material shall be free from organic vegetative matter.

c. The maximum size of any particle shall not be greater than three inches in diameter.

d. Oversize material may either be removed or broken down to the specified dimensions by any method which accomplishes reduction to that size.

e. The removal or the breakdown of oversize material to the specified size shall be done at the material source.

f. Contractor shall furnish any additional suitable material to backfill under the slab and shape around the finished structure and the stockpiled topsoil can be reused.

2. Aggregate Fill

a. Crushed aggregate, 3/4-inch minus. See Section 2611 Crushed Aggregate

C. Execution

1. Strip all vegetation and deposit large material as specified in Section 02135. The upper four to eight inches of the topsoil from the area to be occupied by the building shall be stockpiled near the construction site for use in final grading.

2. The Contractor shall supply all additional fill material suitable for backfill under the slab and vault toilet to shape around the finished structure as shown on the drawings.

3. Excavation shall produce surfaces to line and grade shown on drawings. All excavated areas shall drain when weather is such that water may collect in holes and ditches.

4. The root structure of all existing trees that are to be trimmed back to the edge of the excavation. No excavated or fill material shall be piled under the drip line of any trees.

5. Exterior fills shall be constructed to sections and elevations indicated. Exterior fills shall drain.

6. Compacted earth fills under concrete slabs and toilet shall be placed in approximately six-inch lifts and compacted with three complete passes with a whacker-type mechanical compactor or equal approved by the Contracting Officer. (Recommend use of 3/4-inch minus crushed aggregate around tanks and up under slab for ease of compaction.) See Specification 13800. Comply with manufacturer’s recommendations for compaction around tanks.

7. When all exterior earthwork is completed, the Contractor shall give the entire site a final dressing to assure that all surfaces are in accordance with the elevations indicated on the drawings.

a. Finish grades adjacent to the building shall be sloped to provide surface drainage away from the building walls in all directions.

b. Use the topsoil previously stripped from the site for the upper layer of fill for finish grades.

c. Rake and shape the backfill and prepare site for seeding.

D. Measurement and Payment

1. There shall be no separate payment for work required under this section. Payment is incidental to and included in the payment of other items of work.

02229 – PATHS AND AGGREGATE APRONS

A. General

1. Construction of all aggregate paths and aggregate aprons shall be as shown on drawings, staked on the ground, and described in the Specifications. Aggregate aprons include aprons around toilet buildings and adjacent to concrete entrance pads. Includes furnishing all labor, equipment, tools and services necessary for the completion of this work.

2. Related Specifications – Section 02611 Crushed Aggregate.

B. Products

1. Aggregate for path and toilet apron construction ¾ - inch minus from a commercial source.

C. Execution

1. Clearing and Grubbing – Clearing and grubbing shall include removal of all organic materials over ½ inch. Care shall be taken to remain within clearing limits so as not to damage or destroy vegetation outside the clearing limits.

2. Aggregate shall be moistened or dried to uniform moisture content suitable for compaction.

3. The aggregate shall be spread in a uniform layer, with no segregation of size, and to a loose depth that shall have the required thickness when compacted.

4. Aggregate shall be compacted using a handheld compactor for pathways and adjacent to paths. Compaction equipment shall be operated over the full width of each layer until visual displacement ceases, but not less than three complete passes.

D. Measurement and Payment

1. There shall be no separate payment for work required under this section. Payment is incidental to and included in the payment of other items of work.

02540 – EROSION CONTROL

A. General

1. The Contractor shall provide all labor, equipment, and materials necessary to comply with State and local laws for the prevention of soil erosion and water pollution.

B. Materials

1. Fiber Coir Waddles, Wood Straw Waddles, or an approved other – any erosion control material must be weed free.

C. Execution

1. Before excavation can proceed, the Contractor shall install waddles as needed in a “U” shape along the low side of the site and up the sides of the site to prevent material from washing across any service loops and into drainages.

2. Waddles shall be installed according to the manufacturer’s recommendations.

3. All cut banks and fill slopes shall be prepared and seeded upon their completion. Notify Contracting Officer when areas are prepared for seeding by the Government.

4. At the completion of the contract Contractor shall remove the barrier before final acceptance.

D. Measurement and Payment

1. There shall be no separate payment for work required under this section. Payment is incidental to and included in the payment of other items of work.

02611 – CRUSHED AGGREGATE

A. General

1. Contractor shall provide labor, materials, and equipment necessary for hauling and placement of crushed aggregate as an apron serving vault toilet entrances and paths and as a leveling course for toilet installations.

B. Materials

1. Contractor shall provide ¾ - inch minus crushed aggregate material from a commercial source, meeting requirements of Gradation F in the following table.

Gradation TV ranges for surface courses.

% by Mass Passing Designated Sieve (AASHTO T 27 and T 11) Grading Designation

Note: Allowable deviations (±) from TV are shown in parentheses. If the plasticity index (PI) is greater than 0, the TV range for the No. 200 sieve size is 6-12 (4).

C. Execution

1. Aggregate shall be moistened or dried to uniform moisture content suitable for compaction.

2. The aggregate shall be spread in a uniform layer, with no segregation of size, and to a loose depth that shall have the required thickness when compacted.

3. Aggregate shall be compacted using a hand-held compactor for pathways and adjacent to vault toilets. Compaction equipment shall be operated over the full width of each layer until visual displacement ceases, but not less than three complete passes.

D. Measurement and Payment

1. There shall be no separate payment for work required under this section. Payment is incidental to and included in the payment of other items of work.

DIVISION 3 – CONCRETE

03200 – CONCRETE REINFORCEMENT

A. General

1. Description - This section specifies furnishing and installing concrete reinforcement.

2. Related Work Specified Elsewhere - Ready-Mix Concrete – Section 03313 B. Materials

1. Steel Reinforcing

a. ASTM A615-75, grade 40, unless other grades are shown on the drawings.

b. All reinforcement shall be new, free from dirt, oil, paint, grease, loose mill scale, and loose or thick rust when placed.

c. Store on blocks or other supports to prevent bending, rusting, and accumulation of dirt or soil. Bundle and tag reinforcement with grades and suitable identification marks for checking, sorting, and placing. Tags and marks shall be waterproof, and left on the steel until it is placed.

C. Execution

1. Installation –

a. Install reinforcement as shown on the drawings and specified herein.

b. Reinforcing details not shown on the drawings or specified, shall meet the requirements of the latest edition of the ACI Code.

2. Placing - Accurately place and adequately support reinforcement with concrete, metal or other chairs, spacers, or ties approved by the Contracting Officer and secure against displacement within the permitted tolerances.

D. Measurement and Payment:

1. There shall be no separate payment for work required under this section. Payment is incidental to and included in the payment of other items of work.

03300 - CAST-IN-PLACE CONCRETE

A. General

1. This Section includes cast-in-place concrete, including reinforcement, concrete materials, mix design, placement procedures, and finishes for concrete entrance pads.

B. Submittals

1. Product Data: For each manufactured material and product indicated.

2. Design Mixes: For each concrete mix indicated.

3. Shop Drawings: Include details of steel reinforcement placement including material, grade, bar schedules, stirrup spacing, bent bar diagrams, arrangement, and supports.

C. Quality Assurance

1. Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products complying with ASTM C 94 requirements for production facilities and equipment.

2. Comply with ACI 301, "Specification for Structural Concrete," including the following, unless modified by the requirements of the Contract Documents.

a. General requirements, including submittals, quality assurance, acceptance of structure, and protection of in-place concrete.

b. Formwork and form accessories.

c. Steel reinforcement and supports.

d. Concrete mixtures.

e. Handling, placing, and constructing concrete.

f. Lightweight concrete.

D. Materials

1. Formwork: Furnish formwork and form accessories according to ACI 301.

2. Concrete Materials

a. Portland Cement: ASTM C 150, Type I or II or I/II, use one brand of cement throughout project.

b. Normal-Weight Aggregate: ASTM C 33, uniformly graded, not exceeding 1-1/2-inch (38-mm) nominal size.

c. Lightweight Aggregate: ASTM C 330.

d. Water: Complying with ASTM C 94.

e. Synthetic Fiber: Fibrillated or monofilament polypropylene fibers engineered and designed for use in concrete, complying with ASTM C 1116, Type III, 1/2 to 1-1/2 inches (13 to 38 mm) long.

3. Admixtures

a. Air-Entraining Admixture: ASTM C 260.

b. Water-Reducing Admixture: ASTM C 494, Type A.

c. High-Range, Water-Reducing Admixture: ASTM C 494, Type F.

d. Water-Reducing and Accelerating Admixture: ASTM C 494, Type E.

e. Water-Reducing and Retarding Admixture: ASTM C 494, Type D.

4. Vapor Retarder: Multi-ply reinforced polyethylene sheet, ASTM E 1745, Class C, not less than 7.8 mils (0.18 mm) thick; or polyethylene sheet, ASTM D 4397, not less than 10 mils (0.25 mm) thick.

a. Fine-Graded Granular Material: Clean mixture of crushed stone, crushed gravel, and manufactured or natural sand; ASTM D 448, Size 10, with 100 percent passing a No. 4 (4.75-mm) sieve and 10 to 30 percent passing a No. 100 (0.15-mm) sieve; complying with deleterious substance limits of ASTM C 33 for fine aggregates.

5. Joint-Filler Strips: ASTM D 1751, asphalt-saturated cellulosic fiber.

6. Curing Materials

a. Evaporation Retarder: Waterborne, monomolecular film forming, manufactured for application to fresh concrete.

b. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf.

c. Moisture-Retaining Cover: ASTM C 171, polyethylene film or white burlap-polyethylene sheet.

d. Water: Potable.

e. Clear, Waterborne, Membrane-Forming Curing Compound: ASTM C 309, Type 1, Class B.

f. Clear, Waterborne, Membrane-Forming Curing and Sealing Compound: ASTM C 1315, Type 1, Class A.

E. Concrete Mixes

1. Comply with ACI 301 requirements for concrete mixtures.

2. Prepare design mixes, proportioned according to ACI 301, for normal-weight concrete determined by either laboratory trial mix or field test data bases, as follows:

a. Compressive Strength (28 Days): 3500 psi (24.1 MPa)

b. Slump: 4 inches (100 mm).

i. Slump Limit for Concrete Containing High-Range Water-Reducing Admixture: Not more than 8 inches (200 mm) after adding admixture to plant- or site-verified, 2- to 3-inch (50- to 75-mm) slump.

3. Add air-entraining admixture at manufacturer's prescribed rate to result in concrete at point of placement having an air content of 4.0 to 6.0 percent within a tolerance of plus 1.0 or minus 1.5 percent.

a. Air content of trowel-finished interior concrete floors shall not exceed 3.0 percent.

F. Concrete Mixing

1. Ready-Mixed Concrete: Comply with ASTM C 94 and ASTM C 1116.

a. When air temperature is between 85 and 90 deg F (30 and 32 deg C), reduce mixing and delivery time from 1-1/2 hours to 75 minutes; when air temperature is above 90 deg F (32 deg C), reduce mixing and delivery time to 60 minutes.

2. Project-Site Mixing: Measure, batch, and mix concrete materials and concrete according to ASTM C 94. Mix concrete materials in appropriate drum-type batch machine mixer.

a. For mixer capacity of 1 cu. yd. (0.76 cu. m) or smaller, continue mixing at least 1-1/2 minutes, but not more than 5 minutes after ingredients are in mixer, before any part of batch is released.

b. For mixer capacity larger than 1 cu. yd. (0.76 cu. m), increase mixing time by 15 seconds for each additional 1 cu. yd. (0.76 cu. m).

G. Execution

1. General installation

a. Formwork: Design, construct, erect, shore, brace, and maintain formwork according to ACI 301.

b. Vapor Retarder: Install, protect, and repair vapor-retarder sheets according to ASTM E 1643; place sheets in position with longest dimension parallel with direction of pour.

i. Lap joints 6 inches (150 mm) and seal with manufacturer's recommended tape.

ii. Cover vapor retarder with fine-graded granular material, moisten, and compact with mechanical equipment to elevation tolerances of plus 0 inch (0 mm) or minus 3/4 inch (19 mm).

c. Steel Reinforcement: Comply with CRSI's "Manual of Standard Practice" for fabricating, placing, and supporting reinforcement.

i. Do not cut or puncture vapor retarder. Repair damage and reseal vapor retarder before placing concrete.

d. Joints: Construct joints true to line with faces perpendicular to surface plane of concrete.

e. Construction Joints: Locate and install so as not to impair strength or appearance of concrete, at locations indicated or as approved by Architect.

f. Isolation Joints: Install joint-filler strips at junctions with slabs-on-grade and vertical surfaces, such as column pedestals, foundation walls, grade beams, and other locations, as indicated.

i. Extend joint fillers full width and depth of joint, terminating flush with finished concrete surface, unless otherwise indicated.

g. Contraction Joints in Slabs-on-Grade: Form weakened-plane contraction joints, sectioning concrete into areas as indicated. Construct contraction joints for a depth equal to at least one-fourth of the concrete thickness, as follows:

i. Grooved Joints: Form contraction joints after initial floating by grooving and finishing each edge of joint with groover tool to a radius of 1/8 inch (3 mm). Repeat grooving of contraction joints after applying surface finishes. Eliminate groover marks on concrete surfaces.

ii. Sawed Joints: Form contraction joints with power saws equipped with shatterproof abrasive or diamond-rimmed blades. Cut 1/8-inch- (3-mm-) wide joints into concrete when cutting action will not tear, abrade, or otherwise damage surface and before concrete develops random contraction cracks.

h. Tolerances: Comply with ACI 117, "Specifications for Tolerances for Concrete Construction and Materials."

2. Concrete Placement

a. Comply with recommendations in ACI 304R for measuring, mixing, transporting, and placing concrete.

b. Do not add water to concrete during delivery, at Project site, or during placement.

c. Consolidate concrete with mechanical vibrating equipment.

d. Cold Weather Placing:

i. Protect concrete work from physical damage or reduced strength which could be caused by frost, freezing actions, or low temperatures, in compliance with ACI 306 and as herein specified.

ii. When air temperature has fallen to or is expected to fall below 40 F (4 C), uniformly heat water and aggregates before mixing to obtain a concrete mixture temperature of not less 50 (10 C), and not more than 80 F (27 C) at point of placement.

iii. Do not use frozen materials or materials containing ice or snow. Do not place concrete on frozen subgrade or subgrade containing frozen materials.

iv. Do not use calcium chloride, salt or other materials containing antifreeze agents or chemical accelerators, unless otherwise accepted in mix designs.

e. Hot Weather Placing:

i. When hot weather conditions exist that would seriously impair quality and strength of concrete, place concrete in compliance with ACI 305 and as herein specified.

ii. Cool ingredients before mixing to maintain concrete temperature at time of placement below 90 F (32 C).

iii. Mixing water may be chilled, or chopped ice may be used to control temperature provided water equivalent of ice is calculated to total amount of mixing water.

3. Finishing Formed Surfaces

a. Rough-Formed Finish: As-cast concrete texture imparted by form-facing material with tie holes and defective areas repaired and patched, and fins and other projections exceeding 1/4 inch (6 mm) in height rubbed down or chipped off.

b. Apply to concrete surfaces not exposed to public view

c. Smooth-Formed Finish: As-cast concrete texture imparted by form-facing material, arranged in an orderly and symmetrical manner with a minimum of seams. Repair and patch tie holes and defective areas. Completely remove fins and other projections.

i. Apply to concrete surfaces exposed to public view or to be covered with a coating or covering material applied directly to concrete, such as waterproofing, dampproofing, veneer plaster, or painting.

ii. Do not apply rubbed finish to smooth-formed finish.

iii. Apply [smooth-rubbed] [grout-cleaned] [cork-floated] finish, defined in ACI 301, to smooth-formed finished concrete.

d. Related Unformed Surfaces: At tops of walls, horizontal offsets, and similar unformed surfaces adjacent to formed surfaces, strike off smooth and finish with a texture matching adjacent formed surfaces. Continue final surface treatment of formed surfaces uniformly across adjacent unformed surfaces, unless otherwise indicated.

4. Finished Uniform Surfaces

a. General: Comply with ACI 302.1R for screeding, restraightening, and finishing operations for concrete surfaces. Do not wet concrete surfaces.

b. Screed surfaces with a straightedge and strike off. Begin initial floating using bull floats or darbies to form a uniform and open-textured surface plane before excess moisture or bleedwater appears on the surface.

i. Do not further disturb surfaces before starting finishing operations.

c. Scratch Finish: Apply scratch finish to surfaces to receive concrete floor topping or mortar setting beds for ceramic or quarry tile, portland cement terrazzo, and other bonded cementitious floor finish, unless otherwise indicated.

d. Float Finish: Apply float finish to surfaces indicated, to surfaces to receive trowel finish, and to floor and slab surfaces to be covered with fluid-applied or sheet waterproofing, built-up or membrane roofing, or sand-bed terrazzo.

e. Trowel Finish: Apply a hard trowel finish to surfaces indicated and to floor and slab surfaces exposed to view or to be covered with resilient flooring, carpet, ceramic or quarry tile set over a cleavage membrane, paint, or another thin film-finish coating system.

f. Trowel and Fine-Broom Finish: Apply a partial trowel finish, stopping after second troweling, to surfaces indicated and to surfaces where ceramic or quarry tile is to be installed by either thickset or thin-set methods. Immediately after second troweling, and when concrete is still plastic, slightly scarify surface with a fine broom.

g. Nonslip Broom Finish: Apply a nonslip broom finish to surfaces indicated and to exterior concrete platforms, steps, and ramps. Immediately after float finishing, slightly roughen trafficked surface by brooming with fiber-bristle broom perpendicular to main traffic route.

5. Concrete Protection and Curing

a. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. Comply with ACI 306.1 for cold-weather protection and follow recommendations in ACI 305R for hot-weather protection during curing.

b. Evaporation Retarder: Apply evaporation retarder to concrete surfaces if hot, dry, or windy conditions occur before and during finishing operations. Apply according to manufacturer's written instructions after placing, screeding, and bull floating or darbying concrete, but before float finishing.

c. Begin curing after finishing concrete, but not before free water has disappeared from concrete surface.

d. Cure formed and unformed concrete for at least seven days as follows:

i. Moisture Curing: Keep surfaces continuously moist absorptive cover, water saturated and kept continuously wet.

ii. Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover for curing concrete, placed in widest practicable width, with sides and ends lapped at least 12 inches (300 mm), and sealed by waterproof tape or adhesive. Immediately repair any holes or tears during curing period using cover material and waterproof tape.

iii. Curing Compound: Apply uniformly in continuous operation by power spray or roller according to manufacturer's written instructions. Recoat areas subjected to heavy rainfall within three hours after initial application. Maintain continuity of coating and repair damage during curing period.

6. Field Quality Control

a. Testing Agency: Owner will engage a qualified independent testing and inspecting agency to sample materials, perform tests, and submit test reports during concrete placement. Tests will be performed according to ACI 301.

i. Testing Frequency: One composite sample for each day's pour of each concrete mix exceeding 5 cu. yd. (4 cu. m), but less than 25 cu. yd. (19 cu. m), plus one set for each additional 50 cu. yd. (38 cu. m) or fraction thereof.

ii. Testing Frequency: At least one composite sample for each 100 cu. yd. (76 cu. m) or fraction thereof of each concrete mix placed each day.

A. Measurement and Payment

1. There shall be no separate payment for work required under this section. Payment is incidental to and included in the payment of other items of work. Included in toilet installation.

DIVISION 13 – SPECIALTIES

13800 – PRE-CAST CONCRETE VAULT TOILET INSTALLATION

A. General

1. This item shall consist of installation of (2) single unit concrete vault toilets, backfill for the toilets and completion of access pathways to the installed vault toilet including both crushed aggregate apron and concrete entrance pads.

B. Products:

1. Backfill - Structural Excavation, Backfill, and Compaction - Section 02222

2. Aggregate - Accessible Aggregate Pathways and Aprons - Section 02229

3. Cast-In-Place Concrete (for pad) – Section 03300

4. Pre-cast Unisex Concrete Vault Toilet – Missoula Concrete/CXT Aspen/Gunnison or approved equal. (Government Furnished.)

C. Execution

1. Prepare site, schedule delivery and placement of pre-cast concrete toilets to the installation site in accordance with manufacturer’s instructions and in accordance with manufacturer specifications.

2. Placement – The floor of the building and the top of the vaults should be the high spot of the site chosen. Finished floor elevation should be 4 – 6 inches above the natural grade measured at the front entrance of the floor. Both the floor and the top of the vault should be above the surrounding ground level with the pathway sloped up to meet the entryway. Ideally, the back of the building should be slightly higher to allow water to freely drain out of the toilet rooms.

3. Excavation, backfill and compaction – The hole shall be dug to accommodate the vaults. It must be large enough to be workable and to allow the floor of the building to fit on the vaults when placed, but small enough to avoid excessive backfill after placement. Compact the natural ground at the bottom of the vault excavation with a minimum of three passes with a whacker-type mechanical compactor or equal approved by the Contracting Officer.

4. Install level course of ¾” minus crushed aggregate so there will be no high spots in the middle of the vault bottom. The vault will be placed by the contractor who will be responsible to coordinate the delivering of the vault to assure that the hole is prepared according to the manufacturer’s requirements. Ideally, the containment area end of the vault should be slightly higher, ¼” per foot of run to allow the building to site higher. Ensure vault is level, side to side, and that it has a 0.5-1% grade front to back so liquid will drain toward the door for cleaning water to escape. Backfill around the structure. Use excavated material for backfill, rocks larger than 3-inches in maximum dimension shall not be placed within 6-inches of the exterior vault walls. Fill, adjacent to the building entry will have excavated material placed in 6-inch loose lifts and compacted with a minimum of three passes with a plate compactor, by vibration, or equivalent approved device by the Contracting Officer. All backfilling activities need to follow OSHA trench guidelines

5. When installation work is completed install aggregate apron around the building, construct concrete entrance pad as shown in the drawings, and aggregate access trail where needed according to the specifications.

Payment will be made under:

13800 – B (North FK Slate Creek CG) Single Concrete Vault Toilet Installed. . . . . .LSQ.

END OF SECTION