C-05_AMD_04_Attachment_2-5_WAD_NCW_SPECS_AMD0004.pdf

MCMILLAN NORTH CLEARWELL MAINTENANCE AND IMPROVEMENTS

01 92 10

MAINTENANCE OF PLANT OPERATIONS

03/17

PART 1 GENERAL

1.1 THE REQUIREMENT

a. The McMillan Water Treatment Plant must be maintained in continuous operation during the entire construction period. The intent of this section is to outline the minimum requirements necessary to allow the Owner to continuously operate and maintain the treatment facility in order to remain in compliance with all permit requirements.

b. The project construction is divided into two construction options, each with its own Substantial Completion date. Phases and major facility improvements per phase are listed below:

(1) Base Bid - The construction duration for base bid items is 365 calendar days after Notice to Proceed. Major components of the Work included in this option consist assisting the Owner O&M Staff in isolating and dewatering the South Clearwell and 78-inch outlet pipe. The Contractor will then proceed with demolition of the existing 78-inch butterfly valve in the South Clearwell outlet chamber, and installation of the following in the South Clearwell outlet chamber: 78-inch wafer style static mixer, 78-inch steel pipe spool piece, 78-inch butterfly valve, and new chemical feed lines. Sluice gates 6-41 and 6-44 are to be replaced, sluice gate 6-43 is to be abandoned, and a modified hatch cover is to be placed over the gate chamber while the South Clearwell is out of service. The South Clearwell meter vault is to be waterproofed prior to the recommissioning of the South Clearwell.

Following the refilling of the South Clearwell, the Owner will conduct a 30-day operational test of the facilities to ensure proper performance. Thirty (30) calendar days after Substantial Completion of the South Clearwell work and satisfactory testing of the static mixer, the North Clearwell will be decommissioned.

Major components of the Work included in the North Clearwell consist of assisting the Owner O&M Staff with isolating and dewatering the North Clearwell and 78-inch South Clearwell Bypass.

The Contractor will then proceed with the demolition of sluice gate 6-37, removal of chemical feed piping, installation of an insert wafer style static mixer in the 78-inch South Clearwell Bypass, replacement of sluice gate 6-37, installation of new chemical feed piping and new Accusonic wiring, and maintenance of sluice gate 6-50 to reduce leakage. The Owner will allow the Contractor 72 hours to isolate the gate valve vault in order to demolish and replace sluice gate 6-42 and chemical feed pipe before the recommissioning of the North Clearwell. This work will require close coordination with the Owner and must proceed around the clock, if required, to facilitate disinfection and the recommissioning of the North Clearwell Sluice Gate Chamber within the 72-hour period.

Within the contracted time, the backwash check valve assembly and the pipe and valve replacement within vault 6-52 are to take

SECTION 01 92 10 Page 1 place. These activities are not sequenced as they can occur at anytime with proper coordination with the Owner.

(2) Optional Bid - An additional 365 days of construction duration will be permitted for optional bid items. After completion of the Base Bid items, the COntractor shall proceed with the placement of the reinforced concrete slab over the North Clearwell existing roof. Once the reinforced concrete slab placement is complete and the roof is secured, the Contractor shall proceed with the interior work, including: leak and structural repairs, abandonment of the existing unused pipes, demolition of the existing baffle walls, and installation of a new FRP baffle wall system.

c. Following Substantial Completion of South Clearwell construction, and after uninterrupted operation of all facilities and delivery of potable water to the DC Water distribution system for a minimum of 30 consecutive days, North Clearwell work may begin.

d. Prior to the 30 day operational period, all facilities and equipment shall be tested, disinfected where required (including disposal of water), and shall be fully capable of producing drinking water in compliance with all Laws and Regulations. The Contractor shall coordinate closely with the Owner in regards to the initial cleaning, flushing, and disinfection of the facilities. The Owner will handle the dewatering and disinfection of the facilities.

e. The Contractor is permitted to dispose of water not contaminated with ammonia, chlorine, or VOCs into the stormwater system. Water contaminated with ammonia or chlorine shall be disposed of into the sanitary sewer system. Water contaminated with VOCs will require removal and disposal at a facility designed to handle VOCs. Capacity is limited, however, and its use shall be coordinated with the Owner. The Contractor shall obtain all necessary permits and pay all costs associated with disposal of additional quantities of water and wastewater during testing and start-up above what can be handled by the stormwater and sanitary sewer system.

f. The Owner will coordinate the supply of finished water necessary for start-up and the 30 day operational period associated with each stage of construction.

g. The Contractor shall schedule and perform the Work in a manner such that the Owner can keep the existing water treatment plant facilities in continuous, dependable operation. The Contractor shall adhere to the constraints listed in this Section and indicated on the Drawings.

h. In performing the work, the Contractor shall plan and schedule his work to meet the plant and pumping system operating requirements, and the constraints and construction requirements as outlined in this Section.

The Contractor shall:

(1) Perform all construction necessary to complete connections, tie-ins, and shutdowns to existing facilities.

(2) Keep existing facilities in operation unless otherwise specifically permitted in these specifications or approved by the Owner.

(3) Perform all construction activities so as to avoid interference

SECTION 01 92 10 Page 2 with operations of the facility.

i. The Contractor has the option of providing additional temporary facilities that can eliminate a constraint, provided it is done without additional cost to the Owner and provided that all requirements of these Specifications are fulfilled.

j. All references to days in this Section shall be consecutive calendar days.

k. In addition to the constraints identified herein, the Contractor shall adhere to the terms and conditions of all permits related to the work being performed under this Contract.

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Shutdown Plan; G, AE

1.3 GENERAL CONSTRAINTS

a. The Contractor shall schedule the Work so that the plant is maintained in continuous operation. All treatment processes shall be maintained in continuous operation during the construction period except during approved process interruptions. All short term system or partial systems shutdowns and diversions shall be approved by the Owner. Long term process shutdowns and diversions shall conform to the requirements hereinafter specified and shall be minimized by the Contractor as much as possible. If in the judgement of the Engineer a requested shutdown is not required for the Contractor to perform the Work, the Contractor shall utilize approved alternative methods to accomplish the Work. All shutdowns shall be coordinated with and scheduled at times suitable to the Owner. Shutdowns shall not begin until all required materials are on hand and ready for installation. Each shutdown period shall commence at a time approved by the Owner, and the Contractor shall proceed with the Work continuously, start to finish, until the Work is completed and normal plant operation is restored. If the Contractor completes all required Work before the specified shutdown period has ended, the Owner may immediately place the existing system back into service.

b. The Contractor shall schedule short-term and extended shutdowns in advance and shall present all desired shutdowns in the 2 week look-ahead schedules at the weekly coordination meetings. Shutdowns shall be fully coordinated with the Engineer and Owner at least 48 hours before the scheduled shutdown. The Owner's personnel shall operate the Owner's facilities involved in the short-term and extended shutdowns and diversions. The Owner does not guarantee that valves, stop logs, gates, etc., are or will be 100 percent water or gas tight.

The Contractor shall provide, at no additional cost to the Owner, all temporary caps, plugs, dewatering, pumping and other measures required to perform the Work. Temporary facilities, including but not limited

SECTION 01 92 10 Page 3 to pumps, pipes, valves, blind flanges, plugs, etc., shall be thoroughly cleaned and disinfected with chlorine solution prior to use. Temporary facilities shall be suitable for use in potable water applications, and shall have no prior use in non-sanitary applications.

c. Any temporary work, facilities, roads, walks, protection of existing structures, piping, blind flanges, valves, equipment, etc. that may be required within the Contractor's work limits to maintain continuous and dependable plant operation shall be furnished by the Contractor at the direction of the Engineer at no extra cost to the Owner.

d. The Owner shall have the authority to order Work stopped or prohibited that would, in his opinion, unreasonably result in interrupting the necessary functions of the plant operations.

e. If the Contractor impairs performance or operation of the plant as a result of not complying with specified provisions for maintaining plant operations, then the Contractor shall immediately make all repairs or replacements and do all work necessary to restore the plant to operation to the satisfaction of the Engineer. Such work shall progress continuously to completion on a 24 hours per day, seven work days per week basis at the Contractor's expense.

f. The Contractor shall provide the services of emergency repair crews on call 24 hours per day to affect repairs to portions of the plant affected by the Contractor's operations.

1.4 GENERAL OPERATING REQUIREMENTS, CONSTRAINTS, AND CONSTRUCTION

REQUIREMENTS

a. General

(1) Operation of all valves and gates shall be performed by Washington Aqueduct or DC Water personnel (based on the particular line to be isolated). Contractor shall coordinate with Owner regarding valve and gate opening and closing requirements.

b. Access to Plant Site, Roadways, and Parking Areas

(1) An unobstructed traffic route through the plant shall be maintained at all times for the Owner's operations personnel and maintenance equipment. All construction traffic for the Work associated with the Project shall use the designated construction entrance as shown on the contract drawings. The Contractor shall keep all traffic on the existing facility roads to an absolute minimum. Vehicular access to the treatment units and buildings for the Owner's personnel shall be maintained at all times by the Contractor. The limits of disturbance indicated on the drawings will be strictly enforced for the Contractor's operations.

(2) Parking for personal vehicles of construction personnel shall not be allowed within XXX. The General Contractor shall be responsible for providing access to and for preparing and maintaining/approved parking areas.

(3) The Contractor shall provide temporary measures to protect the existing pavement by filling over with earthen material or supplying other measures acceptable to the Engineer, and he shall repair any damage to existing paved surfaces that occurs during

SECTION 01 92 10 Page 4 the construction period. Any areas disturbed along the shoulders of the access road and interior roads and elsewhere inside and outside of the plant shall be repaired, graded, seeded, etc. as necessary to match pre existing conditions.

(4) The Contractor shall not undertake the restoration/construction of new roadway (paved, gravel, or asphalt overlay) shown on the Contract Drawings, until all other work on the plant improvements has been completed.

c. Personnel Access

(1) Treatment plant personnel shall have access to all areas which remain in operation throughout the construction period. The Contractor shall locate stored material, dispose of construction debris and trash, provide temporary walkways, provide temporary lighting, and other such work as directed by the Engineer to maintain personnel access to areas in operation. Access and adequate parking areas for plant personnel must be maintained throughout construction.

d. Plumbing Facilities

(1) Unless otherwise allowed by the Engineer, sanitary facilities in the existing structures shall be operational at all times for plant operating personnel. All other building plumbing systems such as roof and floor drains, pumping, etc., shall be maintained for all structures.

e. Building Heating and Ventilating

(1) Building heating and ventilating for the existing plant structures shall be in service for the entire construction period.

Additional temporary heating and ventilation shall be provided as required to maintain facilities under construction adequately heated and vented. The temperatures to be maintained in any areas occupied by plant operating personnel such as offices, lunchrooms, locker rooms, bathrooms, etc., shall be at least 65°F. The temperatures to be maintained in all other interior plant areas, whether new, existing or temporary, shall be maintained at a minimum of 55°F.

f. Draining Process Pipes and Conduits

(1) The contents of all pipes and conduits to be removed, replaced or relocated (or dewatered for a specific purpose) shall be transferred to a suitable facility in a manner approved by the Owner through hoses or piping, or by using pumps if hydraulic conditions so require them. The Contractor shall provide the pumps, piping and hoses at no additional cost to the Owner. No uncontrolled spillage of a pipe or conduit shall be permitted.

Any spillage, other than potable water, shall be immediately washed down and flushed into the appropriate process flow train.

g. Potable Water System

(1) Potable water service shall be maintained in continuous service at all times during construction except for short term interruptions required for tie ins. Shutdown of the potable water system shall

SECTION 01 92 10 Page 5 be fully planned and coordinated with the Plant Superintendent and shall be limited to not more than four (4) hours. Existing fire hydrants within the plant site shall be operational at all times, unless otherwise approved by the Owner.

1.5 SPECIFIC OPERATIONAL CONSTRAINTS

a. General

(1) The following describes the general sequence of construction of the Work. The sequence does not purport to include all Work necessary and it may be modified to suit existing conditions which are encountered. It shall be used as a guide to prepare the construction schedule and the shutdown schedule. The Contractor is solely responsible for scheduling the project in conjunction with the anticipated construction sequence.

(2) Prior to commencing any work on the South Clearwell, the new 78-inch wafer style static mixer, 78-inch steel pipe, and 78-inch butterfly valve shall be delivered to the site.

b. General Sequence - South Clearwell Decommissioning/Recommissioning

(1) Site clearing, erosion control, and rough grading.

(2) Construct temporary access roads and install traffic control measures, parking, and signage.

(3) Perform the following activities to isolate and dewater the South Clearwell and 78-inch diameter South Clearwell effluent pipe:

(a) Close gate 6-44 in the Sluice Gate Chamber.

(b) Close Bryant Street Pump Station valve which isolates the South Clearwell effluent pipe (DC Water coordination required).

(c) Dewater the South Clearwell and 78-inch diameter effluent pipe.

(4) Remove the existing 78-inch butterfly valve in the South Clearwell outlet chamber.

(5) Install the new work in the South Clearwell outlet chamber including but not limited to the: 78-inch wafer style static mixer, 78-inch steel pipe, and 78-inch butterfly valve.

(6) Following successful installation, the new work in the South Clearwell outlet chamber shall be tested in accordance with the Contract Documents.

(7) Disinfect the new work, South Clearwell, and 78-inch diameter South Clearwell effluent pipe in accordance with the Contract Documents.

(8) Following successful bacteriological testing (performed by Owner), initiate the 30-day operational period.

(9) Following successful completion of the South Clearwell testing, the Contractor may request Substantial Completion of the South

SECTION 01 92 10 Page 6

Clearwell Construction.

c. General Sequence - North Clearwell Decommissioning/Recommissioning

(1) Perform the following activities to isolate and dewater the North Clearwell and 78-inch diameter South Clearwell Bypass pipe:

(a) Close gates 6-37 and 6-50 in the North Clearwell.

(b) Close gate 6-42 in the Sluice Gate Chamber.

(c) Close Bryant Street Pump Station valve which isolates the South Clearwell Bypass pipe.

(d) Open gates 6-41 and 6-44 in the Sluice Gate Chamber.

(e) Dewater the North Clearwell and 78-inch diameter South Clearwell Bypass pipe.

(2) Install the 78-inch wafer style static mixer in the 78-inch diameter South Clearwell Bypass pipe.

(3) Following successful completion of the work in the North Clearwell and South Clearwell Bypass pipe, the new work shall be tested in accordance with the Contract Documents.

(4) Disinfect the new work, North Clearwell, and 78-inch diameter South Clearwell Bypass pipe in accordance with the Contract Documents.

(5) Following successful bacteriological testing (performed by Owner), initiate the 30-day operational period.

(6) Following successful operation of the plant for a minimum of 30 consecutive calendar days (all finished water produced has been treated in compliance with regulations), the Contractor may request Substantial Completion for Stage 2 Construction.

1.6 SHUTDOWN SCHEDULE

a. The shutdowns describe work which requires bypasses, shutdowns and coordination of existing operating facilities. The list does not purport to include all Work necessary and it may be modified to suit existing conditions which are encountered. It shall be used as a guide to prepare the construction schedule and the shutdown schedule.

Shutdowns are not necessarily listed in the order they must be performed. The Contractor is solely responsible for scheduling the shutdowns in conjunction with the anticipated construction sequence.

b. General shutdown requirements:

(1) Shutdown periods are indicated in 24-hour calendar days, or number of hours.

(2) Operation of all valves and gates shall be performed by Washington Aqueduct or D.C. Water personnel (based on the particular line to be isolated). Contractor shall coordinate with Owner regarding valve and gate opening and closing requirements.

(3) Simultaneous shutdowns of more than one facility, except as

SECTION 01 92 10 Page 7 specifically indicated or allowed by the Owner, will not be permitted.

(4) The Contractor shall submit a Shutdown Plan consisting of a construction sequence, time schedule, details of labor, equipment and material available for work to be performed during each shutdown to the Engineer. The plan shall demonstrate the Contractor's ability to meet the time limitations.

(5) Insofar as possible, all equipment to be incorporated into existing facilities, shall be ready for installation before the existing facilities are shutdown, including the identification of wiring required to transfer power and monitor and control existing and new equipment. The Contractor shall identify the conduit and wiring required to ensure the prior work specified for each shutdown will be complete and that the re-start of equipment will not be delayed.

(6) If the Work, during shutdown periods, is not done satisfactorily, or as planned, or within the time required or approved, the Engineer may order the Contractor to work a 24-hour work schedule with a full crew, or he may order the Contractor to place the facility back in service and reschedule the shutdown or, he may order the Work required to place the facility back in service done with other forces. If the work is done by other forces, the Owner's costs will be deducted from the amounts due to the Contractor. In no case shall the Owner be required to make additional payment for overtime work or redoing the work caused by the Contractor's failure to complete the work in the allotted time

c. South Clearwell Improvements - Shutdown No. 1: South Clearwell and 78-inch South Clearwell effluent pipe.

(1) General Description: Shutdown of finished water flow to the South Clearwell to allow for the construction of the 78-inch wafer style static mixer and 78-inch butterfly valve in the South Clearwell outlet chamber.

(2) Shutdown Period: 4 calendar weeks.

(3) Prior Work: The Contractor shall have completed the following work prior to commencing the shutdown:

(a) 78-inch wafer style static mixer, 78-inch steel pipe, and 78-inch butterfly valve shall be delivered to the site.

(b) Isolation and dewatering of South Clearwell and 78-inch South Clearwell effluent pipe.

d. North Clearwell Improvements - Shutdown No. 2: North Clearwell and 78-inch South Clearwell Bypass pipe.

(1) General Description: Shutdown of finished water flow to the North Clearwell to allow for the construction of the 78-inch wafer style static mixer in the South Clearwell Bypass pipe.

(2) Shutdown Period: 4 calendar weeks.

(3) Prior Work: The Contractor shall have completed the following

SECTION 01 92 10 Page 8 work prior to commencing the shutdown:

(a) 78-inch wafer style static mixer shall be delivered to the site.

(b) Successful 30-day operation of the South Clearwell following completion of Stage 1.

(c) Isolation and dewatering of North Clearwell and 78-inch South Clearwell Bypass pipe.

PART 2 PRODUCTS

NOT USED

PART 3 EXECUTION

NOT USED

-- End of Section --

SECTION 01 92 10 Page 9

SECTION 03 01 35

CONCRETE REPAIRS

01/13

PART 1 GENERAL

1.1 1.1 REFERENCES

The publications listed below form a part of this section to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN CONCRETE INSTITUTE INTERNATIONAL (ACI)

ACI 503.1-503.4 (1992, R 2003) Four Epoxy Specifications

ASTM INTERNATIONAL (ASTM)

ASTM C109/C109M (2011b) Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or (50-mm) Cube Specimens)

ASTM C33/C33M (2011a) Standard Specification for Concrete Aggregates

ASTM C881/C881M (2010) Standard Specification for Epoxy-Resin-Base Bonding Systems for Concrete

ASTM C882/C882M (2012) Bond Strength of Epoxy-Resin Systems Used with Concrete by Slant Shear

ASTM D1623 (2009) Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics

ASTM D638 (2010) Standard Test Method for Tensile Properties of Plastics

NSF INTERNATIONAL (NSF)

NSF/ANSI 61 (2011; Addenda 2012) Drinking Water System Components - Health Effects

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals summary of the work; G, AE applicator qualifications; G, AE

SECTION 03 01 35 Page 1 alternative materials and/or methods of work; G, AE

SD-02 Shop Drawings

Shop Drawings; G, AE

SD-03 Product Data technical data sheets; G

SD-07 Certificates material certifications; G, AE

1.3 THE REQUIREMENT

The Contractor shall furnish all materials, labor, equipment, tools, etc., required for the repair, renovation, and replacement of concrete and joints in concrete as indicated on the Drawings, specified herein, and determined by field survey.

The Contractor, in conjunction with the Engineer and the Government, shall determine the extent of cracked or deteriorated concrete and joints in concrete to be rehabilitated and/or repaired. Areas to be repaired shall be identified and established during a joint field survey conducted by the Contractor, the Government, and Engineer. Field survey shall be conducted after reservoir is removed from service and soil over burden is totally removed from over the reservoir. A summary of the work to be performed based on this survey shall be submitted to the Engineer for review, and such summary shall be approved by the Engineer prior to commencement of the Work.

Concrete repairs include the following:

1. Repair of expansion and construction joints in bottom slab of reservoir as shown on Contract Drawings and specified herein.

2. Injection of waterproof injection grout into joints and cracks in walls and bottom slab of reservoir as deemed necessary by field survey and as shown on Contract Drawings and specified herein.

3. Installation of waterproof membrane patch over joints in walls, joints between walls and bottom slab, and joints in bottom slab as deemed necessary by field survey and as shown on Contract Drawings and specified herein.

4. Repair of spalled areas with surface spall repair approach as deemed necessary by field survey and as shown on Contract Drawings and specified herein.

5. Repair of spalled areas with spall repair material requiring formwork as deemed necessary by field survey and as shown on Contract Drawings and specified herein.

6. Repair of structural cracks with epoxy crack repair binder for cracks in top cover of reservoir as deemed necessary by field survey and as shown on Contract Drawings and specified herein.

SECTION 03 01 35 Page 2

7. Repair of expansion joints/construction joints in top cover of reservoir as deemed necessary by field survey and as shown on Contract Drawings and specified herein.

Extent of repair work shall be determined by joint field survey of structure conducted after reservoir is taken out of service and existing soil overburden on top of reservoir has been totally removed. Contractors shall base bid on estimated quantities of each type of concrete or joint repair as defined on the Contract Drawings and on the Price Schedule and as specified herein.

Submit Shop Drawings detailing any planned deviation from the proposed construction sequence and/or method of repair.

The Contractor, based on their experience in their profession, may submit to the Engineer for approval, alternative materials and/or methods of work to assure the durability and watertight integrity of the repair work performed.

1.3.1 Qualifications

The Contractor shall furnish the name of all subcontractors/applicators which he proposes to use for this work, including necessary evidence and/or experience records to ascertain their qualifications in the application of epoxy, urethane, and polymer-modified mortars and grouts. Approved applicator qualifications shall include:

A. A minimum of 5 years experience in applying epoxy, urethane, and polymer-modified and cement-based compounds similar to those specified in this Section.

B. A letter from the manufacturer of the specified materials, on the manufacturer's letterhead, signed by an officer of the company, stating that the subcontractor/applicator has been trained in the proper techniques for applying the product, including surface preparation and mixing, placing, curing, and caring for the manufacturer's products.

This letter shall further state the subcontractor/applicator is on the manufacturer's approved list of contractors.

1.4 Additional Guarantee

The Contractor shall guarantee all repair work performed under this Contract against defects in workmanship resulting in leakage and/or failure of concrete bond for a period of two years from the date of the Certificate of Substantial Completion.

PART 2 PRODUCTS

2.1 MATERIALS

Provide material certifications and technical data sheets on all grouts, mortars, epoxy resins, aggregates and repair products specified in this Section. All concrete repair materials and other products used for work within the reservoir shall conform to NSF/ANSI 61 for contact with potable water supplies.

2.1.1 Water

The water used for mixing concrete repair products shall be clear, potable, SECTION 03 01 35 Page 3 and free of deleterious substances.

2.1.2 Aggregate

All aggregate shall conform to ASTM C33/C33M. The aggregate supplier shall submit to the Engineer documentation that the proposed aggregates comply with ASTM C-33 and the requirements listed below:

Pea Gravel - Pea gravel shall meet the gradation and material requirements of Standard Size #8 as defined by ASTM C33/C33M. Pea gravel shall be clean and free from deleterious matter and shall contain no limestone.

2.1.3 EPOXY BONDING AGENT

An epoxy bonding agent shall be used when applying fresh concrete to previously placed concrete. Epoxy bonding agent shall conform to ASTM C881/C881M Type I, II, IV or V; Grade 2 for epoxy resin adhesives, depending on the application. The class of epoxy bonding agent shall be suitable for all ambient and substrate temperatures.

2.1.4 ANTI-CORROSION REBAR COATING

All reinforcing steel cut or exposed during demolition and/or repair operations shall be protected with an anti-corrosive coating. The anti-corrosive coating shall be a three-component, epoxy-modified cementitious material specially formulated as a bonding agent and anti-corrosion coating. Product shall have a minimum bond strength of 2,800 psi in accordance with ASTM C882/C882M.

2.1.5 EPOXY CRACK REPAIR BINDER

Epoxy crack repair binder shall be a two-component, 100% solids, high-modulus, low viscosity epoxy adhesive designed for structural repair.

Product shall conform to ASTM C881/C881M with a minimum tensile strength of 7,900 psi as per ASTM D638.

2.1.6 EPOXY RESIN BINDER

Epoxy resin binder shall conform to the requirements of ASTM C881/C881M, Type III, Grade 3, Class B and C for epoxy resin binder.

2.1.7 WATERPROOF INJECTION GROUT

Waterproof crack repair material shall be a one-component, water-activated polyurethane hydrophilic injection grout capable of 700% expansion.

Polyurethane grout shall form a tough flexible foam seal that is impenetrable to water. Material shall have a minimum tensile strength of 300 psi in accordance with ASTM D1623.

2.1.8 SPALL REPAIR PATCHING MATERIAL

All spall repairs not requiring formwork shall be repaired using a two-component, polymer-modified non-shrink cementitious mortar and shall have a minimum 28-day compressive strength of 7,000 psi as per ASTM C109/C109M. All spall repairs requiring formwork shall be repaired using a two-component, polymer-modified cementitious mortar/pea gravel mixture and shall have a minimum 28-day compressive strength of 7,000 psi as per ASTM C109/C109M. All spall repair materials shall conform to

SECTION 03 01 35 Page 4

EPA/USPHS standards for surface contact with potable water supplies.

Products shall have a minimum bond strength of 2,500 psi at 28 days per

ASTM C882/C882M.

2.1.9 WATERPROOF MEMBRANE PATCH

Waterproof membrane patch shall be a hypalon rubber sealing strip secured to the concrete substrate with an epoxy adhesive. Sealing system shall be installed per manufacturer's recommendations. Minimum width of waterproof membrane patch shall be twelve (12) inches unless shown otherwise on Contract Drawings.

2.1.10 STORAGE OF MATERIALS

The Contractor shall provide an area for repair material storage free from exposure to moisture in any form, before, during, and after delivery to the site. Manufactured materials shall be delivered in unbroken containers labeled with the manufacturer's name and product type. All mortar products shall be stored on raised platforms. Materials susceptible to damage by freezing shall be stored in a dry, heated, insulated area. Any material that has hardened, partially set, become caked and/or has been contaminated or deteriorated shall be rejected. All aggregates shall be stored in clean bins, scows or platforms.

PART 3 EXECUTION

3.1 GENERAL REQUIREMENTS

No repair work shall be undertaken when ambient temperatures are below manufacturer's safe recommendations. No admixtures, except those required by the manufacturer, shall be used in the repairs specified herein. All products shall be applied in strict accordance with manufacturer's recommendations. The Contractor shall furnish and install safe scaffolding and ladders for the Engineer's prework inspection, the repair work activities, and the Engineer's final inspection.

Waterblast (3000-4000 psi waterjet) deteriorated areas to remove all loose concrete, existing coatings, unsound material, debris, and laitance. All surfaces shall be clean, free of dirt, grease, loose particles, and deleterious substances and shall be prepared according to manufacturer's requirements. This surface preparation shall be applied to all of the entire interior surface area of the walls and slab of the reservoir, including areas where repair will not be required. Surface preparation of entire extent of interior surface of walls and bottom shall include removal and disposal of all lime sediment deposits and biofilm. Contractor shall isolate and collect all water used in cleaning and surface preparation and dispose of water offsite to avoid draining water into distribution system from Reservoir. Surface cleaning and preparation on interior of Reservoir shall not occur until joint material containing asbestos in floor joints of structure is removed and properly disposed of.

3.2 EPOXY BONDING AGENT

Existing concrete surfaces shall be roughened prior to application of bonding agent. Concrete surface shall be clean and sound, free of all foreign particles and laitance. Repair material shall be placed while bonding agent is still tacky. If bonding agent cures prior to placement of repair material, bonding agent shall be reapplied.

SECTION 03 01 35 Page 5

Repairing concrete with epoxy mortars shall conform to all the requirements of ACI 503.1-503.4 "Standard Specification for Repairing Concrete with Epoxy Mortars" (latest edition), except as modified herein.

3.3 ANTI-CORROSION REBAR COATING

Reinforcing steel cut or exposed during demolition and/or repair operations shall be sandblasted and cleaned prior to coating with an anti-corrosive coating. Anti-corrosive coating shall be applied as soon as the reinforcement is exposed and cleaned. Coating shall thoroughly cover all exposed parts of the steel and shall be applied according to manufacturer's recommendations.

3.4 EPOXY CRACK REPAIR BINDER

Where indicated on the Drawings or determined via joint condition assessment, all existing structural cracks 1/4" or smaller shall be repaired by pressure injecting an epoxy crack repair binder into the prepared crack. Seal crack surface and install injection ports per manufacturer's recommendations. Holes drilled for injection ports shall not cut rebar. If rebar is encountered during drilling, the hole shall be abandoned and relocated, and the abandoned hole shall be patched immediately with epoxy resin binder flush with the surface of the existing concrete. Once the surface sealing material has cured, inject crack with epoxy crack repair binder using standard pressure injection equipment as directed by the manufacturer.

3.5 EPOXY RESIN BINDER

Epoxy resin binder shall be used to seal all existing rebar cut and burned off during demolition operations. Exposed rebar shall be burned back 1/2" minimum into existing concrete and the resulting void filled with epoxy resin binder.

3.6 WATERPROOF INJECTION GROUT

All existing, leaking cracks 1/4" or smaller shall be repaired by pressure injecting a waterproof injection grout into the prepared crack. Seal crack surface and install injection ports per manufacturer's recommendations.

Holes drilled for injection ports shall not cut rebar. If rebar is encountered during drilling, the hole shall be abandoned and relocated, and the abandoned hole shall be patched immediately with epoxy resin binder flush with the surface of the existing concrete. Once the surface sealing material has cured, inject crack with waterproof injection grout using standard pressure injection equipment as directed by the manufacturer.

3.7 SPALL REPAIR PATCHING MATERIAL

All voids or spalled areas to be repaired shall be chipped back to sound concrete a minimum 1/8" deep, cleaned and repaired with spall repair patching material according to manufacturer's recommendations. All patching shall provide a final finished surface which is flat, level and even with the existing concrete surface. Repair mortar shall not be feathered to meet existing concrete surface. A sawcut groove shall be scored around the perimeter of all areas to receive repair material a minimum depth of 1/8" to ensure feathering of the material does not occur.

Final patching on horizontal surfaces shall receive a broom finish consistent with the finish on the existing structure.

SECTION 03 01 35 Page 6

3.8 WATERPROOF MEMBRANE PATCH

Thoroughly clean the concrete substrate and apply waterproof membrane patch according to manufacturer's recommendations.

3.9 CURING

All repair products shall be cured in strict accordance with manufacturer recommendations.

3.10 WORK IN CONFINED SPACES

The Contractor shall provide and maintain safe working conditions for all employees and subcontractors. Fresh air shall be supplied continuously to confined spaces through the combined use of existing openings, forced-draft fans and temporary ducts to the outside, or by direct air supply to individual workers. Fumes shall be exhausted to the outside from the lowest level of the confined space. Electrical fan motors shall be explosion-proof if in contact with fumes. No smoking or open fires shall be permitted in or near areas where volatile fumes may accumulate.

SECTION 03 01 35 Page 7

SECTION 06 72 11

FIBERGLASS REINFORCED PLASTIC (FRP) BAFFLE WALL

07/17

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM D256 (2010) Determining the Izod Pendulum Impact Resistance of Plastics

ASTM D570 (1998; E 2010; R 2010) Standard Test Method for Water Absorption of Plastics

ASTM D638 (2014) Standard Test Method for Tensile Properties of Plastics

ASTM D695 (2010) Standard Test Method for Compressive Properties of Rigid Plastics

ASTM D790 (2015; E 2016; E 2016) Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Baffle Wall System; G, AE

SD-03 Product Data

Product Data

SD-05 Design Data

Design Analyses And Calculations; G, AE

SD-06 Test Reports

Field Test Reports; G

SD-07 Certificates

Certificate(s) of Compliance; G, AE

SECTION 06 72 11 Page 1

Certificate(s) Of Conformance; G, AE

Installation Certificate; G, AE

SD-08 Manufacturer's Instructions

Installation

1.3 QUALITY CONTROL

Contractor shall coordinate all design, configuration, installation requirements, clearances and other conditions with various suppliers and manufacturers so that the entire baffle wall system is manufactured to meet the intent of the design. All fabrication shall be carefully inspected at the factory by inspectors who shall use whatever means necessary to assure proper fit of all field connections and compliance with all material and fabrication requirements of the specifications.

1.3.1 Manufacturer Qualifications

Manufacturer shall provide a list of three (3) installations, with end-user contact information of similar applications where this baffle wall system was successfully installed.

1.4 DELIVERY, STORAGE, AND HANDLING

a. Delivery, storage and handling instructions shall be provided by the manufacturer and shall be strictly adhered.

b. Deliver materials to the jobsite in undamaged boxes or pallets that are clearly marked with the project name, contractor name, Manufacturer's name, product name, production date and product code.

c. Store materials in dry, protected areas in an upright position. Control temperature of storage areas in accordance with Manufacturer's instructions. Protect moisture sensitive materials with breathable tarps on sides and top surfaces.

1.5 WARRANTY

Provide warranty and guarantee in accordance with Section 01 20 00 WARRANTY REQUIREMENT, except that the warranty period shall be two years.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

The contractor shall furnish and install the Baffle Wall System complete with all accessories, hardware and appurtenances as specified herein, as shown the drawings and as required for a complete installation.

The baffle wall system shall comply with the requirements of ANSI/NSF 61 Standards. Locations, dimensions, design criteria are indicated in the Contract Drawings.

Shop drawings shall be complete indicating all aspects ot the baffle wall system, including but not limited to, design analyses and calculations signed and sealed by a Professional Engineer registered in the state in

SECTION 06 72 11 Page 2 which the application is being installed, manufacturer's instructions, material list of all components (product data), manufacturer's recommended baffle detailed dimension, deflection angle(s), location for each application, method(s) of attachment (including number), location and size of fasteners, weights of fabrication and any other unusual or project-specific details.

2.1.1 Performance Requirements

Installed system shall meet the requirements of ANSI/ASCE 7-10 and of governing building codes standards.

The panel shall be designed to support the following loading:

a. Lateral Load: Panel shall be designed to withstand 2 to 4 inches differential head of water between both sides of the panel with a minimum safety factor of 2.5:1 and an L/D ratio of greater than or equal to 100. Certified calculations shall be submitted for review and approval prior to the manufacture of the baffle wall.

b. Vertical Load: The panels shall be designed to carry up to 50 lbs per foot load along the length of the baffle with a safety factor of 2.5:1 and an L/D ratio of greater than or equal to 100.

c. Column Loading: Columns shall be designed to support all the loading transferred to it by the baffle assembly within allowable stress and deflection limitations. The column shall have a minimum L/D ratio of 180.

Baffle Wall Panels shall possess the following minimum typical coupon properties (appropriate testing standard provided as well):

Tensile Strength 42,000 psi ASTM D638

Flexural Strength 32,000 psi ASTM D790

Flexural Modulus 1.5x10^6 psi ASTM D790

Water Absorption 0.25% ASTM D570

Izod Impact Strength 25 ft-lbs/in ASTM D256

Compressive Strength 50,000 psi ASTM D695

PART 3 EXECUTION

3.1 INSTALLATION

The installation contractor shall field verify existing dimensions and install the baffle wall system in accordance with the contract drawings, approved shop drawings and manufacturer's recommendations. Mounting holes shall be factory drilled. Filed cutting of baffle panels will be allowed to accommodate obstructions. All field cut or drilled edges shall be coated per the manufacturer's recommendations to prevent fiber blooming or fraying. All of the fasteners required for installation shall be supplied by the wall manufacturer. The baffle wall panels shall be attached to the surrounding concrete structure using adequate anchors given the application and/or working conditions with stainless steel washer and hex nuts. All

SECTION 06 72 11 Page 3 installation fasteners shall be stainless steel.

Upon completion and final inspection by a manufacturer's representative and as a pre-requisite to final acceptance, the Contractor and the manufacturer's representative shall submit the following reports confirming the baffle wall system was installed in accordance with the contract drawings, approved shop drawings, and manufacturer's recommentdations: all successfully passing field test reports, Certificate(s) of Compliance, Certificate(s) of Conformance, and Installation Certificate.,

3.2 FIELD QUALITY CONTROL

3.2.1 Materials

All materials, including any panels or resin shall be new and shall be specifically designed or selected for the function and service specified.

No material may be used in the project that has not been approved by the engineer.

Baffle panels shall be produced from continuous pultrusion process and can be polyester or vinyl ester.

All hardware shall be 316 stainless steel.

SECTION 06 72 11 Page 4

SECTION 32 01 16.71

COLD MILLING ASPHALT PAVING

02/17

PART 1 GENERAL

1.1 QUALITY ASSURANCE

1.1.1 Grade

Mill pavement such that the finished surface conforms to the lines, grades, and cross sections indicated. The maximum allowable deviation of the finished milled pavement surfaces from the established plan grade line and elevation will be 0 inches. The deviations from the plan grade line and elevation will not be permitted in areas of pavements where closer conformance with planned grade and elevation is required for the proper functioning of appurtenant structures involved.

1.1.2 Surface Smoothness

The maximum allowable deviation of the finished surfaces from the testing edge in the transverse or longitudinal direction will be 1/4 inch.

1.1.3 Traffic Control

Provide all necessary traffic controls during milling operations.

1.2 EQUIPMENT, TOOLS, AND MACHINES

Maintain in a satisfactory working condition equipment, tools, and machines used in the performance of the work.

1.2.1 Cold-Milling Machine

Provide a cold-milling machine which is self-propelled, capable of milling the pavement to a specified depth and smoothness and of establishing grade control; with means of controlling transverse slope and dust produced during the pavement milling operation. Machine will have capability of adding water in front of equipment to minimize dust during milling operation. The machine will have the ability to remove the millings or cuttings from the pavement and load them into a truck. The milling machine will not damage any part of the pavement structure that is not to be removed.

1.2.2 Cleaning Equiment

Provide cleaning equipment suitable for removing and cleaning loose material from the pavement surface.

1.2.3 Straightedge

Furnish and maintain at the site, in good condition, one 12 foot straightedge or other suitable device for each milling machine, for testing the finished surface. Make straightedge available for Government use. Use straightedges constructed of aluminum or other lightweight metal, with blades of box or box-girder cross section with flat bottom reinforced to

SECTION 32 01 16.71 Page 1 insure rigidity and accuracy. Use straightedges with handles to facilitate movement on the pavement.

1.3 ENVIRONMENTAL REQUIREMENTS

Do not perform milling when there is accumulation of snow or ice on the pavement surface.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.1 MILLING OPERATION

A minimum of seven days notice is required, prior to start work, for the Contracting Officer to coordinate the milling operation with other activities at the site. Make sufficient passes so that the designated area is milled to the grades and cross sections indicated. Mill the pavement in depth increments that will not damage the pavement below the designated finished grade. If scabbing occurs, the surface will not meet smoothness requirements. Take steps to modify the process as needed to prevent scabbing from occuring. Repair or replace, as directed, items damaged during milling such as manholes, valve boxes, utility lines, pavement that is torn, cracked, gouged, broken, or undercut. Remove the milled material from the pavement and load into trucks.

3.2 GRADE AND SURFACE-SMOOTHNESS TESTING

3.2.1 Grade-Conformance Tests

Test the finished milled surface of the pavement for conformance with the plan-grade requirements and for acceptance by the Contracting Officer by running lines of levels at intervals of 10 feet longitudinally and 10 feet transversely to determine the elevation of the completed pavement. Correct variations from the designated grade line and elevation in excess of the plan-grade requirements as directed. Skin patching for correcting low areas will not be permitted. Remove and replace the deficient low area.

Remove sufficient material to allow at least 1 inch of asphalt concrete to be placed.

3.2.2 Surface-Smoothness Tests

After completion of the final milling, the finished milled surface will be tested by the Government with a straightedge. Other approved devices may be used, provided that when satisfactorily and properly operated, such devices reveal all surface irregularities exceeding the tolerances specified. Correct surface irregularities that depart from the testing edge by more than 1/4 inch. Skin patching for correcting low areas will not be permitted. Remove and replace the deficient low area. Remove sufficient material to allow at least 1 inch of asphalt concrete to be placed.

3.3 REMOVAL OF MILLED MATERIAL

Place material that is removed in the disposal area as specified material that is removed will become the property of the Contractor and removed from the site.

SECTION 32 01 16.71 Page 2

SECTION 32 01 16.71 Page 3

SECTION 32 12 13

BITUMINOUS TACK AND PRIME COATS

05/17

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO…