Project Manual GSW 39_01_21.pdf

PROJECT MANUAL

GSW-39-01-21 SEWER LINE UPGRADE

PREPARED FOR:

GEORGIA SOUTHWESTERN STATE UNIVERSITY

800 GEORGIA SOUTHWESTERN STATE UNIVERSITY DRIVE

AMERICUS, SUMTER COUNTY, GEORGIA

EMC PROJECT NO: 21-7029

MAY 28, 2024

Environmental Marine Civil Survey

Albany Atlanta Augusta Brunswick Columbus Greenville, SC Landrum, SC Rincon Savannah Statesboro Thomaston

3575 Macon Road, Suite 15

Columbus, GA 31907

Phone: (706) 565-5985

Fax: (706) 565-5983 www.emc-eng.com

GEORGIA SOUTHWESTERN STATE UNIVERSITY MAY 28, 2024

GSW-39-01-21 SEWER LINE UPGRADE (EMC 21-7029) BID SET

GEORGIA SOUTHWESTERN STATE UNIVERSITY

EMC Project No. 21-7029 Sewer Line Upgrade

INDEX TO SECTIONS

Section Number Title Pages

02010 Subsurface Conditions 02010-1

02100 Demolition & Clearing 02100-1 to 02100-4

02200 Earthwork 02200-1 to 02200-5

02270 Erosion & Sedimentation Control 02270-1 to 02270-2

02555 Protective Coating for Existing and New 02555-1 to 02555-8

Concrete and Masonry Sanitary Sewer Structures

02570 Sanitary Sewers 02570-1 to 02570-11

02610 Pipe Bursting Methods 02610-1 to 02610-8

03300 Cast-in-place Concrete 03300-1 to 03300-12

SUBSURFACE CONDITIONS 02010 - 1

SECTION 02010

SUBSURFACE CONDITIONS

PART 1 - GENERAL

1.1 EXISTING CONDITIONS

A. The Contractor should visit the site and acquaint himself with all existing conditions. Prior to bidding, bidders may make their own subsurface investigations to satisfy themselves as to site and subsurface conditions, but such subsurface investigations shall be performed only under time schedule and arrangements approved in advance by Engineer.

1.2 QUALITY ASSURANCE

A. Soils tests may be conducted by the Owner to control performance of Work in connection with excavating, filling and grading. Readjust all Work performed that does not meet technical or design requirements, but make no deviations from the Contract Documents without specific and written approval of the Engineer.

END OF SECTION 02010

DEMOLITION AND CLEARING 02100 - 1

SECTION 02100

DEMOLITION & CLEARING

1.1 DESCRIPTION

A. Work included:

Demolition, clearing, and grubbing required for this Work may include but is not necessarily limited to:

1. Removal of concrete and removal of asphaltic concrete pavement.

2. Felling of trees and removal of stumps, roots, tree debris, and other vegetation designated for removal. Trimming of trees to remain. Prior to any construction work, the contractor is to install tree fencing as per notes and details as shown on the plans for those trees that are not to be disturbed during construction. The contractor is not to store or put any construction equipment, materials, personal vehicles, construction vehicles or construction waste in the tree save area.

3. Demolition and removal of buildings where noted on Plans.

4. Removal of all debris.

5. Constructing necessary barriers and barricades where required.

B. Related Work described elsewhere:

1. Subsurface conditions: Section 02010.

2. Earthwork: Section 02200.

C. Definitions:

1. The term "demolition, clearing, and grubbing," as used herein, includes the removal of all existing objects (except for those objects designated to remain) down to the existing ground level, plus such other work as is described in this Section of these Specifications.

2. The term "clearing" shall consist of the felling, cutting up, and satisfactory disposal of all trees, bushes, shrubs, vegetation, and debris occurring within the area to be cleared.

3. The term "grubbing" shall consist of the removal and disposal of all stumps, roots larger than two (2) inches in diameter to the depth specified, and matted roots from the designated grubbing areas.

DEMOLITION AND CLEARING 02100 - 2

A. Qualification of workmen:

Provide at least one person who shall be present at all times during the demolition, clearing and grubbing operations, and who shall be thoroughly familiar with the Work involved and who shall direct the Work.

B. Codes and Standards:

1. Conform to all Federal, State and local laws and regulations.

2. In addition to complying with all pertinent codes and regulations, comply with the requirements of those insurance carriers providing coverage for this Work.

1.3 JOB CONDITIONS

A. Protection:

Provide adequate facilities for protecting all structures, buildings, and utilities underground, on the surface, or above ground against all construction activity. In the event of damage, immediately make all repairs and replacements necessary to the approval of the Engineer at no additional cost to the Owner.

1. Traffic and Services:

a. Arrange Work to cause a minimum of disturbance to normal pedestrian and vehicular traffic.

b. Provide adequate means of access to all public and private properties during all stages of construction.

PART 2 - PRODUCTS

2.1 FILL MATERIAL

Where fill is required, all fill dirt shall be free from vegetation and debris and shall be obtained from a site approved by the Engineer.

2.2 OTHER MATERIALS

All other materials not specifically described but required for proper completion of the work of this Section, shall be as selected by the Contractor subject to approval of the Engineer.

PART 3 - EXECUTION

3.1 PREPARATION

A. Notification:

Notify the Engineer at least one full working day prior to commencing the Work of this Section.

DEMOLITION AND CLEARING 02100 - 3

B. Site inspection:

1. Prior to all Work of this Section, carefully inspect the entire site and all objects designated to be removed and to be preserved.

2. Locate all existing utility lines and determine all requirements for disconnecting and capping the lines which are to be abandoned.

3. Locate all existing utility lines traversing the site and determine the requirements for the protection of those lines which are to remain.

C. Clarification:

1. The Drawings do not purport to show all objects existing on the site.

2. Before commencing the Work of this Section, verify with the Engineer all objects to be removed and all objects to be preserved.

D. Scheduling:

1. Schedule all Work in a careful manner with all necessary consideration for neighbors and the public.

2. Avoid interference with the use of, and passage to and from, adjacent buildings and facilities.

E. Disconnection of utilities:

Before starting site operation, disconnect or arrange for the disconnection of all utility services designated to be removed, performing all such Work in accordance with the requirements of the utility company or agency involved.

F. Protection of utilities:

Preserve in operating condition all active utilities transversing the site and designated to remain.

G. Limits of construction:

Demolition, clearing and grubbing shall be performed over the total right-of-way of all newly proposed streets and alleys unless otherwise noted on the plans. Additional areas shall be as noted on the plans and as required for construction of the project including space for control stakes and hubs.

3.2 DEMOLITION OF STRUCTURES

Demolish all buildings designated for demolition, pulling out all foundations, basement walls, and concrete slabs; remove all existing asphaltic concrete pavement designated to be removed.

3.3 OTHER DEMOLITION

Pull out all existing septic tanks and fuel lines, utility lines designated for abandonment, irrigation and leaching lines, and all other objects designated to be removed. Removal of all facilities shall conform to all existing local, State and Federal regulations.

DEMOLITION AND CLEARING 02100 - 4

3.4 CLEARING

Remove all rubbish, vines and undergrowth to ground level or below and all other obstructions resting on or protruding through the surface of the existing ground. Trees or shrubs which are to remain in place shall be trimmed and shall be carefully protected from injury or defacement. All limbs and branches required to be trimmed shall be neatly cut close to the trunk of the tree or to main branches, and cuts more than one and one-half (1 1/2) inches in diameter shall be painted with an approved pruning paint in strict accordance with manufacturer's recommendations. All trimming shall be in accordance with the "Standard Pruning Guidelines" for the local authority.

3.5 GRUBBING

Stumps, roots, logs or other timber more than two (2) inches in diameter, matted roots and other debris shall be excavated and removed to a depth not less than eighteen (18) inches below the surface of any subgrade, shoulder or slope. All depressions excavated below the original ground surface shall be refilled with suitable material and compacted to make the surface conform to the surrounding ground surface.

3.6 PAVEMENT REMOVAL AND REPLACEMENT

A. Removal:

1. Cut and remove all concrete and asphalt sidewalk and street paving along straight lines.

2. Width: Limit to required width of excavation.

B. Replacement:

1. Repair or replace all concrete and asphalt sidewalk and street paving removed, disturbed or destroyed by construction activity of this project.

2. Use methods and materials required to provide finished sidewalk or paving equal to existing in all respects including finish texture.

3. Place base material for paving over excavations in streets or highways upon completion of backfilling and then open thoroughfare to traffic.

4. Maintain surface of excavation in smooth riding condition until wearing surface is placed.

5. Place wearing surface when directed by Engineer.

3.8 DISPOSAL

A. Removal of debris:

Remove all debris from the site and leave the site in a neat and orderly condition to the approval of the

END OF SECTION 02100

EARTHWORK 02200 - 1

SECTION 02200

EARTHWORK

PART 1 - PRODUCTS

1.1 MATERIALS:

A. General: Where the terms "approved", "suitable", "unsuitable" and similar designations are used in specifications section pertaining to earthwork, it means earth or material designated as being approved, suitable or unsuitable for their intended use by the soils technician of the

B. Suitable Soil Materials are defined as those complying with ASTM D-2487 soil classification groups: GW, GP, GM, SM, SW, and SP.

C. Unsuitable Soil Materials are defined as those complying with ASTM D-2487 soil classification groups GC, SC, MH, ML, CL, CH, OL, OH, PT. Clays, silts, and organic soils will be considered as unsuitable materials. Excess water in materials will be a basis for establishing unsuitable material regardless of gradation.

D. Backfill and Fill Materials shall be suitable soil materials, free of clay, rock or gravel larger than 2" in any dimension, debris, waste, frozen materials, vegetable and other deleterious matter. Suitable materials for earth fill shall generally be composed of sands, clay-sand and silt-sand mixtures and shall be approved by the soils technician or the Engineer prior to being incorporated in fills.

E. Borrow shall consist of sand or sand clay soils capable of being readily shaped and compacted to the required densities, and shall be free of roots, trash and other deleterious material.

PART 2 - EXECUTION

2.1 TOP SOIL

A. Contractor shall strip and stockpile topsoil.

B. Topsoil shall be placed to a depth of 4" over all disturbed areas.

C. Any remaining topsoil will be hauled off site and disposed of at the Contractor's expense.

D. Additional topsoil shall meet Georgia Department of Transportation Specification 893.1. Any additional topsoil which is required to repair disturbed areas and complete the contract shall be provided by the Contractor at his expense.

2.2 EXCAVATION

A. Excavation is unclassified and includes excavation to subgrade elevations indicated, regardless of character of materials and obstructions encountered.

B. All excavation shall be in conformity with the lines, grades and cross sections shown on the

Plans or established by the Engineer. All suitable material removed in the excavation shall be used as far as practicable in formation of embankment, subgrades and shoulders and at such other places as may be indicated on the Plans or directed by the Engineer.

EARTHWORK 02200 - 2

C. Unauthorized Excavation consists of removal or loosening of materials beyond indicated subgrade elevations or dimensions without specific directions of the Engineer. Unauthorized excavation, as well as remedial work directed by Engineer, and as specified herein shall be at Contractor's expense.

Under footings, foundation bases, or retaining walls, fill unauthorized excavations by extending indicated bottom elevation of footing or base to the bottom of the excavation, without altering required top elevation.

Elsewhere, backfill and compact unauthorized walls, fill unauthorized excavations as specified for authorized excavations of same classification, unless otherwise directed by the

D. Additional Excavation: When excavation has reached required subgrade elevations and unsuitable materials exist, carry excavations deeper and replace excavated materials as directed by the Engineer. Dispose of unsuitable material as directed by the Engineer.

The Contractor shall dispose of unsuitable and surplus materials except where the Engineer permits the use of such fill slopes, or unless specific disposal areas are shown on the Plans.

E. Dewatering: Prevent surface water and subsurface or ground water flowing into excavations and from flooding project site and surrounding area. Do not allow water to accumulate in excavations. Remove water to prevent softening of roadway subgrades and foundation bottoms, undercutting footings, and soil changes detrimental to stability of subgrades and foundations. Provide and maintain pumps, well points, sumps, suction and discharge lines, and other dewatering system components necessary to convey water away from excavations.

Establish and maintain temporary drainage ditches and other diversions outside excavation limits to convey rain water and water removed from excavations to collecting or run-off areas.

Do not use trench excavations as temporary drainage ditches.

The Contractor will be responsible for all damage incurred in handling water conditions.

F. Material Storage: Stockpile satisfactory excavated materials where directed, until required for backfill or fill. Stockpiles shall be placed, graded and shaped for proper drainage and to minimize erosion. Locate and retain soil materials away from edge of excavations. Do not store within drip-line of trees indicated to remain.

G. Excavation for Structures: Conform to elevations and dimensions shown within a tolerance of plus or minus 0.10', and extending of sufficient distance from footings and foundations to permit placing and removal of concrete framework, installations to permit placing and removal of concrete framework, installation of services, other constructions, and for inspection. In excavating for footings and foundations, take care not to disturb bottom of excavation. Excavate by hand to final grade before concrete reinforcement is placed. Trim bottoms to required lines and grades to leave solid base to receive other work.

H. Proper drainage shall be maintained at all times.

I. Perform excavation within drip-line of large trees to remain by hand or by other means which will result in (1) cleanly twisting, tearing, breakage or other injury to roots remaining on the tree. Protect existing trees and shrubs at all times during earthwork operations. No trees shall be removed without prior approval of the Owner.

EARTHWORK 02200 - 3

2.3 BORROW

A. Shall be excavated and hauled by the Contractor from his own sources and shall meet the requirements as specified.

B. Borrow shall be procured by the Contractor.

C. Contractor shall bear all expenses in developing borrow sources including drying material, haul roads, excavation and hauling.

2.4 GROUND SURFACE PREPARATION FOR FILL

A. All vegetation such as roots, brush, heavy sods, heavy growth of grass, decayed vegetation matter, rubbish, and other unsuitable material within the areas to be filled shall be stripped and removed prior to beginning the fill operation.

B. Sloped ground surfaces steeper than 1 vertical to 4 horizontal, on which fill is to be placed shall be plowed, stepped, benched or broken up as directed, in such a manner that the fill material will bond with the existing surface.

C. Surfaces on which fill is to be placed and compacted shall be wetted or dried as may be required to obtain the specified compaction.

2.5 FILL

A. Shall be reasonably free from roots, organic material, trash and stones having maximum dimensions of 6 inches.

B. Shall be placed in successive horizontal layers of 8 inches (4 inches for hand tamped compaction) in loose depth for the full width of the cross-section and compacted as required with heavy compaction equipment.

2.6 FINISH GRADING

A. All areas covered by the project including excavated and filled sections and adjacent transition areas shall be smooth graded and free from irregular surface changes.

B. Degree of finish shall be that ordinarily obtainable from either blade-grader or scraper operations, supplemented with hand raking and finishing, except as otherwise specified.

C. The finished surface of unpaved areas shall be not more than 0.05' feet above or below the established grade or designed cross-section. Grading shall be done in order that no ponding will occur.

D. Ditches shall be finished smooth to reduce erosion and permit adequate drainage.

2.7 DISPOSAL OF WASTE MATERIAL

All vegetation, roots, brush, sod, broken pavements, curb and gutter, rubbish, and other unsuitable or surplus material stripped or removed from the limits of construction shall be disposed of by the Contractor.

EARTHWORK 02200 - 4

2.8 PROTECTION

A. Protect existing trees and shrubs at all times during earthwork operations. No trees shall be removed without prior acceptance of the Owner.

B. The Contractor shall be responsible for protection of low grade utilities shown on the drawings or indicated to him by the Owner at all times during earthwork operations.

C. Graded areas shall be protected from traffic, erosion, settlement, or any washing away that may occur from any cause prior to acceptance.

D. Any repair or reestablishment of grades prior to final acceptance shall be at the Contractors expense.

PART 3 - TESTING

3.1 COMPACTION TESTING

A. General: Compaction of earth fill and all pavement sub-grades shall be performed to the percentage of maximum standard of modified dry densities and to the depths as indicated below:

B. Roadway Sub-grades: 100% Standard (ASTM Test D-698) Compact top 12" in Parking areas and top 15" in Driveways.

C. Sub-grades under pavement removed and replaced for utility installations: 100% Standard (ASTM Test D-698) to 12 inch depth.

D. Structural Fill under all structures, slabs and steps: 98% Standard (ASTM Test D-698).

Compact top 12 inches of sub-grade and each layer of fill.

E. Sub-grade below Sidewalks and Curb and Gutters: 97% Standard (ASTM Test D-698) Compact top 6 inches.

F. Unpaved Areas to be grassed, sodded or landscaped: 90% Standard (ASTM Test D-698) full depth.

All other areas not described above: as directed by the Engineer.

G. Moisture Control: All compaction shall be performed at material moisture contents within 3 percentage points, plus or minus, of optimum. Where sub-grade or layer of soil material must be moisture conditioned before compaction, uniformly apply water to surface of sub-grade, or layer of soil material, to prevent free water appearing on surface during or subsequent to compaction operations. Remove, and replace, or scarify and air dry, soil material that is too wet to permit compaction to specified density. Soil material that has been removed because it is too wet to permit compaction may be stockpiled or spread and allowed to dry. Assist drying by dicing, harrowing or pulverizing until moisture content to a satisfactory value.

H. Field Density Tests: Tests shall be made in accordance with ASTM Method D-1556 and/or

ASTM 2922. Minimum testing frequency shall be based on the most stringent of the following requirements (as applicable). Additional tests may be required by the Engineer in areas he deems critical.

EARTHWORK 02200 - 5

- One every layer of fill,

- One every 200 cubic yards of fill,

- One every 250 square yards of roadway sub-grade of fill,

- One every building sub-grade

- Areas where degree of compaction is in question

If in opinion of Engineer, based on testing service reports and inspection, sub-grade or fills which have been placed are below specified density, additional compaction and testing will be required.

I. Proof Rolling: Proof rolling of the sub-base or sub-grade of all areas of new road paving will be required. Equipment shall be a single axle dump loaded with rock or crusher run with a maximum axle load of 15,000 pounds, or as determined by the Engineer.

END OF SECTION 02200

EROSION AND SEDIMENTATION CONTROL 02270 - 1

SECTION 02270

EROSION AND SEDIMENTATION CONTROL

All erosion and sedimentation control measures and BMP's must be incompliance with the Sedimentation Control Act of 1972 as amended in 2000. All erosion and sedimentation control measures will be installed in accordance with the Manual for Erosion and Sedimentation Control in Georgia as amended in 2000. All erosion and sedimentation control measures must be designed for a 25-year storm event.

A person will be designated at the pre-construction conference to be responsible for implementation and maintenance of erosion and sedimentation controls on a 24-hour, daily basis.

PART 2 - EXECUTION

2.1 GENERAL

A. All erosion and sedimentation control measures must be installed prior to initiation of construction activity.

B. Every effort shall reasonably be employed by the Contractor to control erosion with the use of, but not limited to, terraces, grassing, and silt fencing during the project. All erosion and sedimentation control measures or facilities, whether temporary or permanent, shall be continuously maintained by the Contractor so as to be effective, or as ordered by the

2.2 DISTURBED AREA STABILIZATION

A. All required grassing shall conform to GA DOT Standard specification section 700 and 890.

Vegetative cover will be placed on completed areas. This vegetative plan will be carried out on road cut and fill slopes, shoulders, and other critical areas created by construction. Plant grass seed as soon as construction in an area is completed. Planting will be made to control erosion, to reduce damage from sediment and runoff to downstream areas and to improve the safety and beauty of the development area.

Due to grading and construction, the areas to be treated are mainly subsoil and substrate.

Fertility is low and the physical characteristics of the exposed material are unfavorable to all but the most hardy plants.

Sod will be utilized to stabilize all disturbed areas throughout this project.

EROSION AND SEDIMENTATION CONTROL 02270 - 2

2.3 DUST CONTROL ON DISTURBED AREAS

A. Dust raised from vehicular traffic will be controlled by wetting down the access road with water or by the use of a deliquescent chemical, such as calcium chloride, if the relative humidity is over 30%. Chemicals shall be applied in accordance with the manufacturer's recommendations.

2.4 SITE RESTORATION

A. The site shall be restored in a manner suitable to accommodate the erosion control device or system of devices for the use, which they are intended.

2.5 TOPSOIL

A. If topsoil is stripped and stored on site to be used after construction, the stockpile side slopes shall be 2:1 or flatter. Stockpiled of topsoil shall not obstruct natural drainage.

Topsoil replacement shall be spread at minimum of 4" thickness.

2.6 SITE SAFETY

A. The Contractor shall incorporate and utilize all necessary fencing and other safety barriers as necessary to prevent trespassing into potentially dangerous areas of the erosion control area.

END OF SECTION 02270

PROTECTIVE COATING FOR MASONRY SANITARY SEWER STRUCTURES

02555 - 1

SECTION 02555

PROTECTIVE COATING FOR EXISTING MASONRY SANITARY SEWER STRUCTURES

PART 1 – GENERAL

1.1 GENERAL

A. This specification covers labor, materials, and equipment required for protecting and/or rehabilitating the interior of concrete sanitary sewer structures by application of a coating to protect the concrete structure from hydrogen sulfide and acid generated by microbiological sources present in the municipal wastewater environment. The protective coating shall also eliminate infiltration, repair voids, and enhance the structural integrity of the sanitary sewer structure.

B. Cementitious material will not be allowed for the protective coating, however, it will be allowed for patching operations.

C. For existing sanitary manholes: The protective coating shall be a polymer based elastometric polyurethane coating. Coating system shall overlap 1” to 2” where hatches sit on the roof; but shall exclude the banked floor. Procedures for surface preparation, cleaning, application and testing are described herein.

D. This specification also covers labor, materials, and equipment required for corrosion protection of all discharge pipes and fittings within existing sanitary sewer manholes.

1.2 REFERENCES

A. ASTM D638 -Tensile Properties of Plastics.

B. ASTM D790 -Flexural Properties of Unreinforced/Reinforced Plastics.

C. ASTM D695 -Compressive Properties of Rigid Plastics.

D. ASTM D4414 -Standard Practice for Measurement of Wet Film Thickness of Organic

Coatings by Notched Gauges

E. ASTM D4541 -Pull-off Strength of Coatings Using a Portable Adhesion Tester.

F. ASTM D2584 -Volatile Matter Content.

G. ASTM D2240 -Durometer Hardness, Type D.

H. ASTM D543 -Resistance of Plastics to Chemical Reagents.

I. ASTM C109 -Compressive Strength Hydraulic Cement Mortars.

J. ACI 506.2-77 -Specifications for Materials, Proportioning, and Application of Shotcrete.

K. ASTM C478 -Bond Strength to Concrete: Concrete Failed.

L. ASTM C496 -Tensile Strength of Chemically Setting Silicate and Silica Chemical

Resistant Mortars.

02555 - 2

M. ASTM C579 -Compressive Strength of Chemically Setting Silicate and Silica Chemical Resistant Mortars.

N. ASTM -The published standards of the American Society for Testing and Materials, West

Conshohocken, PA.

O. NACE -The published standards of National Association of Corrosion Engineers (NACE

International), Houston, TX.

P. SSPC -The published standards of the Society of Protective Coatings, Pittsburgh, PA.

Q. ASTM C396 -Compressive Strength of Cement Mortars.

R. ASTM C580 -Standard Test Method for Flexural Strength and Modulus of Elasticity of

Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concrete.

S. ASTM D4541 -Standard Test Method for Drying Shrinkage of Mortar Containing

Hydraulic Cement.

T. ASTM D4787 -Standard Practice for Continuity Verification of Liquid or Sheet Depth

Applied to Concrete Substrates.

1.3 SUBMITTALS

A. Product Data:

1. Technical data sheet on each product used, including ASTM test results indicating the product conforms to and is suitable for its intended use per these specifications.

2. Material Safety Data Sheets (MSDS) for each product used.

3. Project specific guidelines and recommendations.

4. Warranty Certificate in accordance with Part 1.08 of this Section.

5. For Existing Sanitary Sewer Manholes:

A. Provide reference documentation to confirm that the proposed coating system has a proven record of performance when used in the intended application, including a list of at least five (5) successful installations that have been in service for a period of ten (10) years. The reference list shall include the name of the facility, the application date, a contact person, and a telephone number.

B. Applicator Qualifications:

1) Manufacturer certification that Applicator has been trained and approved in the handling, mixing and application of the products to be used.

2) Certification that the equipment to be used for applying the products has been manufactured or approved by the concrete rehabilitation products manufacturer, protective coating manufacturer, and certified for proper use for this specific application.

02555 - 3

3) Written documentation of four (4) recent references of Applicator involving existing sanitary sewer manholes with surface area of approximately 3,000 square feet) indicating successful application of a polyurethane coating.

4) Applicator must provide written documentation of having installed a minimum of 40,000 sq.ft. of protective coating similar to that specified within the last two (2) years.

5) Any project specific guidelines for the project.

6) Design details for any additional ancillary systems and equipment to be used in site and surfaced preparation, application and testing.

1.4 QUALITY ASSURANCE

A. Applicator shall initiate and enforce quality control procedures consistent with applicable ASTM, NACE and SSPC standards and the protective coating manufacturer's

B. Coating Manufacturer’s authorized field representative shall be on site prior to the application of the coating system to verify that the substrate has been properly prepared, and during the application of the coating system to certify that the coating system has been properly applied. The authorized field representative will provide the Owner with an accurate and objective written report stating inspection observations on the preparation, application, and final inspection verifying adherence to coating manufacturer recommendations, industry standards, and the written specifications.

1.5 DELIVERY, STORAGE, AND HANDLING

A. All materials are to be kept dry, protected from weather and stored under cover.

B. Protective coating materials are to be stored according to manufacturer’s recommendations. Do not store near flame, heat or strong oxidants.

C. Repair and protective coating materials are to be handled according to their material safety data sheets.

1.6 SITE CONDITIONS

A. Applicator shall conform with all local, state and federal regulations including those set forth by OSHA, RCRA and the EPA and any other applicable authorities.

B. Method statements and design procedures are to be provided by the Contractor when confined space entry is required.

C. During coating operations of existing manholes and lift station wetwells, Contractor shall provide temporary flow bypassing of the structure if required by the Owner.

02555 - 4

1.7 ACCESS TO THE WORK SITE

A. Contractor shall provide proper facilities for such access and observation of the Work and also for any inspection or testing by others. If any Work is covered contrary to the request of the OWNER’s Representative, it must, if requested by the OWNER’s Representative, be uncovered for observation and replaced at the Contractor’s expense.

B. Contractor shall provide access to site inspection.

1.8 WARRANTY

A. Sanitary Sewer Manholes and Valve Pits: All materials and workmanship shall be warranted to the owner for a period of five (5) years.

PART 2 - PRODUCTS

2.1 REPAIR MATERIALS

A. Cementitious patching, repair, and structural restoration materials used shall be only those specified and pre-approved. Project specific submittals shall be provided including application, cure time and surface preparation procedures which permit optimum bond strength with protective coating.

B. Repair materials shall be used to fill voids, structurally reinforce and/or rebuild substrate surfaces, etc. as determined necessary by the engineer and protective coating applicator.

Quick blending, rapid setting, high early strength, fiber reinforced, non-shrink repair mortar that can be trowelled or pneumatically spray applied must be compatible with the specified protective coating and shall be applied in accordance with the manufacturer’s

C. The following products are accepted and approved as compatible repair basecoat materials for protective topcoating for use within the specifications.

1. Infiltration Control: All fast setting materials furnished shall be applied directly to active leaks under hydrostatic pressure from the exterior of the concrete in wetwell structures or control by dewatering methods. Materials shall consist of rapid setting cements and various accelerating agents. Material shall not contain chlorides, gypsum, or metallic particles. Should groundwater be encountered, Contractor shall be responsible for utilizing a dewatering system(s) to remove water from the excavations.

2. Repair, patching, and structural restoration: All material furnished shall be designed to fill voids and to repair or reconstruct where no hydrostatic pressure exists. Material shall consist of rapid setting cements, NSG aggregates, and various accelerating agents. Material shall not contain chlorides, gypsum, or metallic particles. All structural restoration materials shall be specifically designed for the rehabilitation of wastewater pump station wetwells and other related concrete structures. Materials shall contain poly fiber reinforcement, fused calcium aluminate, and chemical admixtures.

02555 - 5

D. STRUCTURAL RESTORATION MATERIAL PROPERTIES:

Product type Fused Calcium Aluminate or Fiberglass Cementitious Cure Time <48 hours Curing gases Non-toxic Compressive Strength 5,000 psi Tensile Strength 500 psi Flexural Strength 600 psi Shrinkage 0% at 90% Relative Humidity

2.2 EXISTING SANITARY SEWER MANHOLES

A. Structural Restoration & Coating Products:

1. Quadex & Raven 405 Products

2. Sauereisen No.-F120/121 & No.-210S Products

3. Spectrashield Liner System Products

4. Strong-Seal® High Performance Mix

5. Thoroc SP15 Spray Mortar & Sewerguard® HBS100 Epoxy Liner

6. A.W. Cook Chemtec calcium aluminate structural restoration product with

Sherwin-Williams Dura-Plate 235 epoxy primer and Sherwin-Williams Sherflex elastomeric polyurethane coating.

7. Or approved equal.

B. Protective Coating Material:

Product type Elastometric Polyurethane Color Light Tensile Strength, psi 1,500 psi Bond Strength – Concrete >Tensile Strength of Concrete Dry Film Thickness 125 mils

2.3 STRUCTURAL RESTORATION MATERIAL AND PROTECTIVE COATING

APPLICATION EQUIPMENT

A. Structural restoration mortars and protective coatings shall be applied with manufacturer approved equipment.

PART 3 -EXECUTION

3.1 ACCEPTABLE APPLICATORS

A. Repair mortar must be applied by manufacturer trained and approved applicators. The repair mortar shall be applied according to manufacturer's recommendations.

B. Protective coating must be applied by a Certified Applicator of the protective coating manufacturer and according to manufacturer specifications.

3.2 EXAMINATION

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A. Appropriate actions shall be taken to comply with local, state and federal regulatory and other applicable agencies with regard to environment, health and safety.

B. All bidders are required to verify that they have visited the jobsite, and are familiar with the conditions and the entire scope of work. Bidders shall field verify the attached plans and perform their own quantity measurements prior to bidding.

C. Contractor shall provide a minimum 24 hour notice to the ENGINEER for the following conditions:

1. after final surface preparation is completed but before structure rehabilitation;

2. after patching operations have cured, and

3. after each coating layer is applied.

D. Installation of the protective coating shall not commence until the concrete substrate has properly cured in accordance with these specifications.

E. Temperature of the surface to be coated should be maintained between 60º F and 100º F during application. Prior to and during application, care should be taken to avoid exposure of direct sunlight or other intense heat source to the structure being coated.

Where varying surface temperatures do exist, care should be taken to apply the coating when the temperature is falling versus rising (i.e., late afternoon into evening vs. morning into afternoon).

3.3 SURFACE PREPARATION

A. Applicator shall inspect all surfaces specified to receive a protective coating prior to surface preparation. The existing piping, valves, and appurtenances shall be protected during structural rehabilitation and protective coating application. The pipes and connectors are to be top coated with 30-50 mils DFT nominal. The pipes and connectors are to be primed by the fabricator with epoxy primer (not coldtar or asphaltic base) that is compatible with the protective coating. After installation, the pipes are to be pressure washed using at a minimum 5,000 PSI and 4 GPM washer and/or abrasive blast cleaned to an SSPC-SP7 ‘brush-off’ specification as necessary for the window of overcoating of the primer.

B. All contaminants including: oils, grease, incompatible existing coatings, waxes, form release, curing compounds, efflorescence, sealers, salts, or other contaminants shall be removed.

C. All concrete or mortar that is not sound or has been damaged by chemical exposure shall be removed to a sound concrete surface or replaced.

D. Old concrete must be firm and structurally sound as specified by the.

E. Surface preparation method(s) should be based upon the conditions of the substrate, service environment and the requirements of the protective coating to be applied.

F. Surfaces to receive protective coating shall be cleaned and abraded to produce a sound surface with adequate profile and porosity to provide a strong bond between the protective coating and the substrate. At a minimum, this will be achieved with a low pressure water cleaning equipment using a 0 degree rotating nozzle at a minimum 3,500 psi and 4 gpm. Other methods such as high pressure water jetting (refer to NACE Standard No. 6 /SSPC-SP 13), abrasive blasting, shotblasting, grinding, scarifying and/or

02555 - 7 acid etching may also be used. In addition, detergent water cleaning and hot water blasting may be necessary to remove oils, grease or other hydrocarbon residues from the concrete. The method(s) used shall be performed in a manner that provides a uniform, sound clean, neutralized surface that is not excessively damaged.

3.4 APPLICATION OF REPAIR MATERIALS

A. Areas where structural steel has been exposed or removed shall be repaired in accordance with the ENGINEER’S recommendations.

B. Repair/Structural Restoration materials shall meet the specifications here and as described in part 2.01A of these specifications. The materials shall be applied utilizing proper equipment on to specified surfaces. The structural restoration material shall match the original undamaged surface.

C. Infiltration shall be stopped by using a material which is compatible with the specified repair mortar, waterproof quick setting mortar-type, that is suitable for topcoating with the specified protective coating. Contractor shall completely identify the types of grout, mortar, and sealant for repair of leak defects and provide case histories of successful use.

D. Infiltration areas that require crack injection shall be covered in this scope of work.

Injection holes shall be drilled through the wetwell at 120 degree angles from each other at the same plane of elevation. Rows shall be separated no more than three vertical feet, and the holes shall be staggered with the holes in the rows above and below. Provide additional injection holes near observed defects and pipe seals. A minimum of 6 injection holes shall be provided per defect. Grout shall be injected through holes under pressure with a suitable probe. Injection pressure shall not cause damage to the wetwell structure or surrounding surface features. Grout shall be injected through the lowest holes first.

Grouting from the ground surface will not be allowed. Provide additional injection holes if necessary to ensure grout travel, verified by field observation of grout at adjacent defects or holes. Patch injection holes using a waterproof quick setting mortar after cleaning with a drill.

E. The approved repair materials shall provide a smooth surface with an average profile equivalent to coarse sandpaper to optimally receive the protective coating. No bugholes or honeycomb surfaces should remain after the final trowel procedure of the repair mortar.

F. The repair materials shall be permitted to cure according to manufacturer recommendations. Curing compounds should not be used unless approved for compatibility with the specified protective coating.

G. After required cleaning and repair is performed, all surfaces shall be inspected for remaining laitance prior to protective coating application. Any evidence of remaining contamination or laitance shall be removed by additional abrasive blast, shotblast or other approved method. If repair materials are used, refer to these specifications for surface preparation. Areas to be coated must also be prepared in accordance with these specifications after receiving a repair mortar and prior to application of the protective coating.

3.5 APPLICATION OF PROTECTIVE COATING

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A. Application procedures shall conform to the recommendations of the protective coating manufacturer, including material handling, mixing, environmental controls during application, safety, and spray equipment.

B. The equipment shall be specifically designed to accurately ratio and apply the specified protective coating materials and shall be regularly maintained and in proper working order.

C. The protective coating material must be applied by a Certified applicator of the protective coating manufacturer.

D. Specified surfaces shall be coated by a moisture tolerant, solvent-free, protective coating properties as described in these specifications.

E. Application equipment approved by the coating manufacturer shall be used to apply each coat of the protective coating. .

F. If necessary, subsequent topcoating or additional coats of the protective coating should occur as soon as the basecoat becomes tack free, ideally within 12 hours but no later than the recoat window for the specified products. Additional surface preparation procedures will be required if this recoat window is exceeded.

3.6 TESTING AND INSPECTION

A. During application a wet film thickness gage meeting ASTM D4414 Standard Practice for

Measurement of Wet Film Thickness of Organic Coatings by Notched Gages, shall be used to ensure a uniform thickness during application.

B. After the protective coating has set hard to the touch it shall be inspected with high-voltage holiday detection equipment meeting ASTM D4787 – Standard Practice for Continuity Verification of Liquid or Sheet Depth Applied to Concrete Substrates. The spark tester shall be initially set at 100 volts per 1 mil (25 microns) of film thickness applied. All detected holidays shall be marked and repaired by abrading the coating surface with grit disk paper or other hand tooling method. After abrading and cleaning, additional protective coating material can be hand applied to the repair area. All touch-up/repair procedures, for areas that do not meet the specified thickness, shall follow the protective coating manufacturer's recommendations.

The NACE Certified Coatings Inspector must be present and monitor the holiday testing (and repairs, if necessary). The final inspection report is to include the holiday testing results.

C. A final visual inspection shall be made by the Inspector and manufacturer's representative. Any deficiencies in the finished coating shall be marked and repaired according to the procedures set forth herein by Applicator.

END OF SECTION 02555

SANITARY SEWERS 02570 - 1

SECTION 02570

SANITARY SEWERS

1.1 DESCRIPTION:

A. Work included: The sanitary sewer system required for this Work is indicated on the Plans and includes, but is not necessarily limited to:

1. Construct sanitary sewer lines, services and cleanouts.

2. Construct sanitary sewer manholes.

B. Related work described elsewhere:

1. Subsurface conditions: Section 02010.

2. Earthwork: Section 02200.

1.2 QUALITY ASSURANCE:

A. The sewer line shall be clean, true to line and grade, and be straight and show a uniform grade between manholes prior to final acceptance. Allowable tolerance shall be plus or minus 0.03 feet from design grade at any point.

B. Infiltration or exfiltration shall not exceed 0.04 gallons per inch diameter per foot of pipe per day for any section of sewer line.

C. Where reference is made to an ASTM or AASHTO designation, it shall be the latest revision as of the date of quotation or bid except as specifically noted on the plans or otherwise specified.

D. Comply with all Federal, State and local laws, codes, regulations and standards.

E. Comply with manufacturer's recommendations as a minimum standard for construction.

F. No visible leaks will be allowed even if pipe meets the allowable leakage in B.

SANITARY SEWERS 02570 - 2

2.1 GENERAL:

A. Use type, class and strength of materials as shown on the plans and as specified herein.

2.2 PIPE MATERIAL:

A. Plastic gravity sewer pipe:

1. Pipe and fittings shall meet the requirements of ASTM Specifications D3034 for SDR35 for pipe diameters from six (6) inches to fifteen (15) inches.

2. The pipe shall be colored green for in-ground identification as sewer pipe.

3. Joints shall be tested and conform to requirements of ASTM D3212.

4. Gaskets shall meet the requirements of ASTM F477.

2.3 FITTINGS:

A. Provide wye fittings in the sanitary sewer main for service sewer connections as shown on the plans.

B. Keep a log of all wye fittings locations during installation and give one legible copy of such log to the Owner prior to completion.

C. Construct all fittings of the same materials as the pipe except in the case of reinforced concrete pipe.

D. Keep material joining the fitting to the pipe free from cracks and adhered tightly to each joining surface.

E. Cap all fittings with a plug of the same material as the pipe, and gasket with the same gasket material as the pipe joint, or use a material approved by the Engineer. The plug shall be able to withstand all test pressures involved without leakage.

2.4 GRAVEL:

A. Use gravel for trench stabilization, drainage or bed which consists of slag, crushed rock or gravel ranging in size so that one-hundred percent (100%) passes a three-fourths (3/4) inch screen and not less than ninety percent (90%) is retained on a #4 screen.

2.5 MANHOLES:

A. Precast Manholes: The use of precast manholes is encouraged. Precast sections shall conform to ASTM C478 and design dimensions. Cones and sections shall be substantially free from fractures, large or deep cracks, and surface roughness. Slabs shall be sound and free from gravel pockets. Shop drawings must be submitted to and

SANITARY SEWERS 02570 - 3

approved by the Engineer prior to placing order. The Engineer reserves the right to modify or disapprove any precast items. Neoprene boots shall be furnished for all piped connection to any precast section. O-rings or approved mastic joints shall be used to ensure watertight connections between manholes sections. All cones shall be of the eccentric type.

B. Masonry Manholes: Only solid clay brick of good quality meeting ASTM C32 grade

MA shall be used. Mortar and grout shall be of Portland Cement Type I or III.

Workmanship shall be of good quality. Maximum corbel is three-fourths (3/4) inch per course of brick. An approved method of construction must be provided to ensure a good bond between PVC sewer pipe and a masonry type manhole.

C. Steps: Manhole steps shall be of cast iron or polypropylene covered steel rod, and furnished and securely installed in accordance with the Plans.

D. Cast Iron Frames and Covers: Castings shall conform to the requirements of grey iron castings, ASTM A48, and to the details shown on the Plans.

3.1 GENERAL:

A. Familiarization: Prior to all work of this Section, become thoroughly familiar with the site, the site conditions, and all portions of the Work falling within this Section.

B. Backfilling prior to approvals:

1. Do not allow or cause any of the Work performed or installed to be covered up or enclosed by Work of this Section prior to all required inspections, tests, and approvals.

2. Should any of the work be so enclosed or covered up before it has been approved, uncover all such Work at no additional cost to the Owner.

3. After the Work has been completely tested, inspected, and approved, make all repairs and replacements necessary to restore the Work to the condition in which it was found at the time of uncovering, all at no additional cost to the Owner.

C. Discrepancies or conflicts:

1. In the event of discrepancy or conflict with other structures or utilities, immediately notify the Engineer.

2. Do not proceed with installation in areas of discrepancy or conflict until all such discrepancies or conflicts have been fully resolved.

3.2 INSTALLATION:

A. Protection of other utilities and structures:

SANITARY SEWERS 02570 - 4

1. Repair or replace any damage done to existing utility lines, services, poles and structures of every nature, which are indicated on the Plans or pointed out by respective utility owners at no expense to the Owner.

2. The Contractor shall locate, excavate, and expose any underground utility lines in advance of trenching operations.

B. Excavation:

1. Make all excavation in open cut unless otherwise directed.

2. Do not advance trench excavation more than three hundred (300) feet ahead of pipe laying unless permitted by the Engineer.

3. Round the bottom of all trenches, except as otherwise specified, to conform to the bottom of the pipe so as to afford full length bearing on the pipe barrel.

4. Correct excavation in excess of depth required for proper shaping as approved by the Engineer.

5. Excavate bell holes so as to relieve pipe bells of all load, but small enough to insure that support is provided through the length of the pipe barrel.

6. Correct excavation in excess of the depths required for manholes and other structures by pouring a subfoundation of three thousand (3000) psi concrete at no additional cost to the Owner.

7. Except in rock, water-bearing earth, or where a granular base is to be used, stop mechanical excavation of trenches above the final grade elevation so that the pipe may be laid on a firm, undisturbed, native earth bed. If overdigging occurs, all loosened earth must be removed and the trench bottom brought to grade with compacted granular material at no additional cost to the Owner.

8. Carry excavation and trenches in rock to a depth of one-fourth (1/4) the diameter of the pipe, but in no case less than six (6) inches below the pipe bottom, by any method acceptable to the Engineer.

9. Construct trenches such as to provide adequate space for workmen to place and joint the pipe properly, but in…