1581197_-_SOW_-_Replace_Blowdown_and_Flash_Tanks.pdf

Public Works Department, Maine

Rev 16

From: PM & E To: Acquisition Date: 09/19/18 Subject: B72_MM UEM ST – REPLACE BLOWDOWN AND FLASH TANKS – REV 1 eProjects #: 1581197 Point of Contact: Mike Melvin

Attachments:

(1) Bid Form

(2) Div 1 Specs

(3) Technical Specifications

(4) Submittal Register

(5) Drawings

(6) Draft eOMSI Workbook

(7) Draft Internal Service Requirement List

1.0 SCOPE OF WORK:

Overview:

This Project will replace the existing blowdown tank, the existing ecology tank, will demolish the existing flash tank, the abandoned feedwater chemical treatment tanks, the abandoned chemical treatment pumps, and the associated piping. The replacement of the ecology tank with a new blowdown separator tank will require installing a new sanitary sewer line beneath the basement floor slab.

Note: Prior to performing any work on the blowdown system, the contractor shall coordinate with the Construction Manager and the Power Plant General foreman to isolate the tank or portion of the blow down system being worked on. The blowdown and ecology tanks shall not be taken out of service simultaneously.

Note: The final configuration of the blowdown system is shown in the P&ID drawing in Attachment 5. The contractor shall reutilize portions of the existing piping in its existing location, to reconfigure the blowdown system as shown in the P&ID drawing, installing new lines where necessary to establish the new configuration. Abandoned lines shall be cut and capped.

Existing Piping Inspection and Classification:

1.1 All piping 2” or larger that will be left in place and reutilized shall be inspected to determine its integrity and its fouling condition. The schedule of this piping is

Subj: 2019_1581197_B72_MM UEM ST – REPLACE BLOWDOWN AND FLASH TANKS Date: 09/19/18 Page: 2 of 24 unknown. The contractor shall determine the schedule and shall identify any piping that was planned to be reutilized that has lost more than 10% of its wall thickness, or any piping that with a cross sectional area that has been reduced by more than 10% due to fouling. If using ultrasonic methods, the pipe shall be tested every 20

ft. The contractor shall notify the Construction Manager of any sections of pipe that exceed the wall loss or fouling conditions identified in this paragraph.

Demolition and Remediation of the Abandoned Feedwater Chemical Treatment Area:

1.2 The contractor shall completely remove all of the components of the abandoned feedwater chemical treatment area. This includes, but it not exclusive to, all four chemical storage tanks, pumps, piping, fittings, valves, tubes, wiring, conduit, hangers, frames used to support the system. Figures 1 & 2 show the area to be remediated and demolished.

Figure 1 – Abandoned Feedwater Chemical Treatment Tanks

Figure 2 – Abandoned Feedwater Chemical Treatment Pumps and Distribution Piping

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1.3 There is an unquantified amount of feedwater treatment chemicals remaining in the tanks and in distribution system in these areas. The contractor shall hire a sub-contractor specializing in hazardous waste remediation to safely remove and dispose of the remaining chemicals in accordance with all Navy, Local, State, and Federal laws, codes, and regulations.

1.3.1 The placards for one of the four chemical tanks is missing. The chemical held in that tank is unknown. Power Plant personnel have been unable to locate the MSDS sheets for the chemicals in all four tanks.

1.3.2 The known chemicals in three of the tanks, manufactured by Betz Dearborn, are Cortol IS104, Optisperse PO423, and Optisperse ADJ561. The contractor will need to sample the unknown tank to determine what precautions and controls are required to remediate its contents.

1.4 All wiring and conduit in the abandoned feedwater chemical treatment area shall be pulled back to the nearest panel outside the area and made electrically safe. The motors are powered by MCC #2. The motor starters are fed from the small panel next to the air receiver for the emergency air compressor.

Blowdown Tank:

1.5 The contractor shall disconnect the wiring and the air tubing servicing the four existing blowdown control valves metering the flow of blowdown into the blowdown tank. The contractor shall then remove these valves and their hangers.

The wiring shall be pulled back to the Distributed Control System (DCS) panel. The associated conduit shall be removed back to the nearest junction box, and made electrically safe. The air tubing shall be removed back to the nearest air pipe and shall be capped (the tubes originate from a pipe directly above the valves).

Figure 3 – Blowdown Control Valves

1.6 The contractor shall disconnect the blowdown tank from the existing and abandoned blowdown feed lines, the existing drain line to the ecology tank, the feed to the 5 lb. steam, and the pressure relief valve vent. The contractor shall

Blowdown Control Valves

Page: 4 of 24 disconnect the energy recovery heat exchanger from the city water supply. The contractor shall remove and dispose of the existing blowdown tank and the associated abandoned energy recovery heat exchanger (co-located with the blowdown tank). See Figure 4.

Figure 4 – Existing Blowdown Tank with Energy Recovery Heat Exchanger and Associated Piping

Note: There are two paths for the continuous blowdown from HRSG #2 to enter the existing blow tank. The contractor shall select the one most convenient to connect to the new blowdown tank and shall cut and cap the other one, while maintaining the flow path to the sample cooler.

1.7 The contractor shall remove the check valve in the 6” line feeding the 5 lb steam system. The contractor shall replace fill the gap left by the check valve with a flanged section of pipe using carbon steel flanges to match the class of the existing flanges to which the pipe will be mated.

Continuous blowdown lines from current and abandoned boilers.

Abandoned energy recovery heat exchanger and bypass valve manifold.

Blowdown tank.

Softened water piping to Condensate Tank.

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1.8 The contractor shall disconnect the wiring from the sensors on the blowdown tank and energy recovery system. Unless the conductors are in good condition and will be reutilized with the new blowdown tank high level alarm, they shall be pulled back to the DCS panel. All conduit exclusively serving these conductors exclusively shall be removed back to the DCS panel, or a junction box where other conductors are consolidated into a larger conduit. Conduit that is in good condition and that will be reutilized with the high level alarm conductors may be left in place.

1.9 Using the P&ID drawing for the existing configuration and the P&ID drawing for new configuration of the contractor shall cut out and dispose of the piping no longer needed to establish the new configuration. This shall include the entirely of the “U-shaped” piping runs that connect directly to the blowdown tank, on which the blowdown control valves are currently mounted, and directly beneath the four tee fittings, into which the blowdown enters, then splits to go the sample coolers and the blowdown tank. The line at the top of this array of pipes (the unnumbered line;

the remaining three pipes are numbered 2, 4, 3 in descending order) served and abandoned boiler and shall be cut and capped directly beneath the tee fitting.

1.10 The contractor shall install a new horizontal blowdown tank, to service a group of Heat Recovery Steam Generators (HRSGs) and direct-fire boilers capable of producing a combined total of up to 460,000 lbs of 200 psi steam with a 5% continuous blowdown. The tank shall incorporate a heat exchanger to transfer energy from the continuous blowdown water to heat make-up water (headed to 60K Condensate tank) or water from the condensate pumps (headed to the deaerators).

1.10.1 The blowdown tank shall meet the following specifications:

Constructed in accordance with the ASME Code for Unfired Pressure Vessels, Section VIII, Division 1.

Provided with a National Board serial number and a “U” stamp.

Minimum capacity of 23,000 PPH of continuous blowdown supplied by boilers operating at a pressure of up to 250 psig.

Tank rated for a minimum of 150 psig.

Tank provided with a pressure relief valve, sized and set to 40 psi.

Provided with a tank level site glass.

Provided with a dial face pressure gauge, mounted on a syphon tube, to prevent damage, with a range of 0 psig to 30 psig.

Tank shall include a port for clean-out and inspection.

Designed to prevent the accumulation of sludge.

Tank shall include a manifold with six ports for mounting six blowdown orifice valves with 1” NPT inlets. Two of these inlets shall be provided blanked, to allow for future expansion of the steam system.

Tank shall be equipped with four manual steel blowdown orifice metering valves, to individually control the flow of blowdown from HRSG #1, HRSG

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#2, Boiler #3, and Boiler #4. The orifice metering valves for HRSG #1 and HRSG #2 shall be equipped with indexable orifice plates that pass from 600 pph to 3500 pph of blowdown water with the boiler operating at 200 psig. The orifice metering valves for Boiler #3 and Boiler #4 shall be equipped with indexable orifice plates. The plates for these two boilers shall allowing flow rates to be set from 300 PPH to 3500 PPH of blowdown water when the boiler is operating at 200 psig. All orifice plates shall have at least seventeen indexable positions, one of which closes the valve (zero flow). These indexable positions shall allow for 3% to 5% boiler blowdown throughout the operating range of the HRSGs and the direct fire boilers. This may require non-standard orifice plates. The orifice valves shall have a 1” NPT drain to connect to the horizontal blowdown tank manifold. Each valve shall a sediment chamber incorporating a stainless steel filter screen, with a drain valve to flush collected solids from the chamber through the 1” NPT drain port.

Tank shall include a 6” 150# flanged flash steam port to allow the tank to vent 5 psi steam to the existing 5 psi steam system.

Tank shall include an external balanced pressure 2” NPT drain valve coupled to a stainless steel float.

The tank shall sit on a saddles spaced 54” apart and shall rest on the flange of an existing 5” wide structural beam, to which it shall be welded.

The tank shall include a float activated high level alarm with a sonic alert, pilot light, and a silencing switch.

The tank shall include a thermometer gauge panel, showing make-up water inlet temperature, make-up water outlet temperature, and blowdown tank drain temperature. All gauges shall be positioned at a height so they are easily readable by a worker standing on the adjacent to the tank, without having to crouch or use a ladder. All gauges shall be liquid filled.

The tank shall incorporate a heat exchanger, where the stainless steel tube bundle(s) can be removed for tank inspection and service of the tube bundles.

The heat exchanger shall be capable of a make-up water flow rate of 336 gpm or greater, with a pressure drop of 2 psi or less. The heat exchanger shall utilize a 4” 150# flanged inlet and outlet.

1.10.2 The contractor shall provide all fittings, valves, traps, gaskets, and pipes necessary to connect the blowdown tank to the continuous blowdown lines from HRSG #1, HRSG #2, Boiler #3, and Boiler #4, to the existing drain line leading to the new separator tank, to the 5 psi steam system, the steam relief vent, and to the make-up water system, as shown in the P&ID for the new blowdown system configuration.

1.10.3 The contractor shall provide all materials to connect any condensate drip legs or line to the existing condensate systems.

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1.10.4 The contractor shall provide all electrical materials needed to power the high level alarm and to send a signal to the Plant’s DCS system, providing the operators with an audio and visual warning on their DCS displays.

1.10.5 The contractor shall modify the floor grating as necessary to accommodate the new tank. Any portions of grating in which a hole will remain that is 6” or larger in diameter shall be replaced. The existing steel grating is 4” x 1 ¼” x 1 ½” deep.

Ecology Tank / Blowdown Separator:

1.11 The contractor shall disconnect the blowdown feed lines, condensate feed line, drains, vent lines, and thermocouples from the Ecology tank. The contractor shall remove and dispose of this tank. The Ecology Tank is shown in Figure 5.

Figure 5 – Ecology Tank

1.12 The contractor shall demolish the existing 3” atmospheric vent line for the ecology tank.

Note: The existing drain line to sanitary sewer is inadequate to the handle the maximum flow from the new separator tank and must be replaced.

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1.13 The contractor shall demolish the existing 4” drain line to the sanitary sewer as necessary to install a new sanitary sewer connection to the 8” sanitary sewer line installed beneath the Turbine #2 bump-out in building 72. Note that the existing 4” drain ties into an 8” line 4’ below the floor surface and adjacent to the tank, however this line immediately necks down to a 4” line and is in poor condition.

1.14 Using a combination of GPR, exploratory excavation, or other means (e.g. TV camera exploration), the contractor shall locate the 8” sanitary sewer line installed in 2003. Note that this pipe travels from Manhole #73, under the Turbine #2 bump-out on Building 72, and then likely passes under the water softeners. As-built drawings from the installation of the 8” sewer line do not depict the path of the sewer line after it reaches the wall adjacent to the water softeners; a break is shown in the drawing.

1.15 The contractor shall then run a new 6” ductile iron sanitary sewer pipe and fittings, conforming with ASTM A746 (with cement-mortar lining conforming with AWWA C104/A21.4) and tie it into the 2003 8” pipe at its existing invert. This line shall connect to the new separator tank with a 6” flanged connection. For all other joints, provide push-on joints conforming with AWWA C111/A21.11.

1.16 The contractor shall fill the excavation back in, compact it, then restore the concrete slab to its original thickness, per the details in the drawings in Attachment (5).

1.17 The contractor shall provide a new vertical separator tank sized to handle the continuous blowdown and intermittent / bottom blowdowns from the existing and proposed HRSGs and boilers at B72, based on a 200 psi operating pressure of the HRSGs and boilers and 1 ½” bottom blowdown lines leaving the boilers. Note that one tank manufacturer consulted recommended utilizing the next size up from their selection charts. The new separator tank shall meet the following specification:

The tank shall be located in approximately the same location as the Ecology tank being removed.

Constructed in accordance with the ASME Code for Unfired Pressure Vessels, Section VIII, Division 1.

Provided with a National Board serial number and a “U” stamp.

Tank shall be rated for 150 psig.

Blowdown inlet pipe shall be 2” NPT.

Atmospheric vent shall be 8” with 150# flange.

Drain shall be 6” with 150# flange.

The tank shall incorporate a wear plate and internal baffles constructed to resist the incoming blowdown.

The tank must include an inspection port.

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The tanks legs must be high enough to allow the installation of an aftercooler beneath it, sized to match the tank.

The aftercooler shall mate to a 6” drain flange on bottom of separator, and shall be a 6” 150# flange at the outlet to the sanitary sewer.

The cooling water inlet to the aftercooler shall be 1 ½” NPT.

The aftercooler shall include a new 1 ½” automatic temperature regulating valve to reduce the discharge water to 140°F using approximately 60°F softened water, tied to a thermocouple installed in the drain line downstream of the softened water mixing inlet. The contractor shall provide a 1 ½” isolation valve on either side of the temperature regulating valve, to allow for maintenance of the system.

The system shall be capable to handling blowdown from a 2” blowdown valve, with a pressure up to 250 psig.

1.18 The contractor shall provide a new NPS 8 schedule 40 carbon steel atmospheric vent line for the separator tank, following the same path as the 3” line that as demolished, as shown in Attachment (5).

1.18.1 This pipe shall terminate 10’ above the roof through which it penetrates.

1.18.2 The contractor shall enlarge the existing roof penetration as necessary to accommodate the larger line sealing around its perimeter to prevent water entry stemming from this opening. The seal shall be designed and manufactured to withstand the temperature and thermal expansion / contraction of the pipe as it vents approximately 212°F steam to atmosphere.

Details of the penetration are shown in Attachment (5). Note that the roof is currently under warranty. The contractor shall engage the installer of the existing roof to ensure that work is performed in a manner that does not compromise the roof’s warranty. The Government will provide the contact information for the roof installer.

1.18.3 The exterior of the vent pipe shall be painted black.

1.18.4 Support the weight of the pipe, approximately 1300 lbs., in accordance with the drawing in Attachment (5). The horizontal bracing on the vertical riser shall be in accordance with the details in Attachment (5).

1.18.5 The vent line shall connect to the separator tank with a bolted 150# flange.

1.18.6 The contractor shall enlarge the grating penetration to allow the vent line to pass from the basement through the 1st level in the plant. This penetration shall be used to brace the piping, using an alignment guide, similar the abandoned 8” ID penetration in the grating.

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1.19 The contractor shall provide all fittings, valves, traps, gaskets, and pipes necessary to connect the separator tank to the continuous and intermittent / bottom blowdown lines from HRSG #1, HRSG #2, Boiler #3, and Boiler #4, to the new sanitary sewer line, the steam relief vent, and to the make-up water system, as shown in the P&ID for the new blowdown system configuration.

Flash Tank:

1.20 The contractor shall demolish the flash tank and its vent line, which extends up the side of Building 72. The Flash tank is shown in Figure 6.

1.21 It is unknown if the gaskets between the flanges of the vent line contain asbestos.

The contractor sample the gasket material and apply the appropriate controls for remediation if asbestos is detected.

Figure 6 – Flash Tank

1.22 The contractor shall demolish the remains of the Flash Tank Room roof, and shall remove all roofing debris from this space. Asbestos was detected in the roofing materials that have collapsed into the room. The contractor shall remediate all of the asbestos containing materials (ACM) with the tank room. The remains of the roof over the flash tank are shown in Figure 7.

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Figure 7 – Remains of Flash Tank Room Roof

1.23 The contractor shall patch the hole in the wall through which the 4” pipe feeding the Flash Tank passed through. This pipe shall be demolished all the way back to the new 2 ½” gate valve, which shall be installed in the location shown in Figure 8.

Prior to demolishing this pipe, the contractor shall install a new pipe support (at the approximate location shown in Figure 8) to support the soon to be unsupported length of pipe left of the new 2 ½” gate valve.

Valves:

1.24 The contractor shall remove and dispose of valve HV200.26 and the adjacent check valve. The contractor shall install a new 2 ½” schedule 160 (or schedule to match the existing) carbon steel pipe, closing the gap left by the removal of the two valves.

1.25 The contractor shall install all of the new valves shown in the P&ID drawing in Attachment (5) to complete the new configuration of the blowdown system. The new 2 ½” gate valve shown on the P&ID drawing shall be located at the location shown in Figure 8. The pipe leading from this location to the tank room shall be demolished. The valve shall have a blank installed on the side on which the pipe was demolished.

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Figure 8 – Location of New Flanged 2 ½” Gate Valve.

1.26 All valves exposed to blowdown water shall be class 150 per ASME B16.34, with valve bodies manufactured from forged A105 steel. Installation of the valves shall conform with the standards of ASME B31.1. The valves shall utilize a socket weld connection, unless a flanged connection is specified in the Scope of Work.

1.27 All valves installed connecting the make-up water system to the heat exchanger or the separator tank may match materials of the existing make-up water piping in those respective areas, or shall be class 150, with valves bodies manufactured from forged A105 steel. The make-up water system in the vicinity of the blowdown tank is believed to be BPVC. The make-up water system piping in the vicinity of the former ecology tank / new separator tank is believed to be schedule 40 carbon steel.

All steel make-up water valves shall be socket welded if equal to or smaller than 2” and butt welded if larger than 2”.

1.28 The contractor shall provide a 1 ½” single seat direct acting automatic temperature regulating globe valve. The valve shall not require an external power source and temperature shall be sensed and translated to the valve via a 316 stainless steel bulb (installed in a 316 stainless steel thermowell) and 316 stainless steel capillary tube.

The valve shall be provided with a temperature indicating actuator, incorporating a dial gage. The valve shall be adjustable and sized so that the working span of the valve is within the middle third of the nominal temperature range for the valve (the valve shall be set to limit the maximum output of the water existing the separator

Location to install new flanged 2 ½” gate valve.

To the Separator Tank.

Bottom blowdown from

HRSG 1 & HRSG 2.

Approximate location to install new pipe support.

Page: 13 of 24 tank to 140°F). The valve body and linear trim shall be manufactured from 316 stainless steel. The valve packing shall be PTFE.

Piping, Fittings, and Supports:

1.29 The contractor shall demolish the 4” pipe from the location of the new valve in Figure 8 to the Flash Tank. All branch connects tying into this line shall be cut and capped with 12 inches of the 4” pipe being removed.

1.30 The contractor shall install all of piping and fittings necessary to complete the new configuration of the blowdown system, as shown in the P&ID drawing in Attachment (5) to complete

1.31 All fittings exposed to blowdown water shall be a minimum of schedule 160 or shall match the existing schedule of the pipe to which it is being connected (nothing smaller than schedule 80 shall be installed). All fittings exposed to blowdown water shall be manufactured from ASTM A234 Grade WPB carbon steel. All butt weld fittings shall comply with standards of ASME B16.9. Unless specified as a flanged connection, socket weld fittings, manufactured from ASTM A105 carbon steel and complying with the standards of ASME B16.11 may be used in lieu of butt weld fittings.

1.32 All piping exposed to blowdown water shall be a minimum of schedule 160 or shall match the existing schedule to which it is being connected (nothing smaller than schedule 80 shall be installed). All blowdown water piping shall be seamless A106 carbon steel. Installation of the piping and fittings shall conform with the standards of ASME B31.1.

1.33 All piping and fittings mating to the make-up water system may match the materials of that system or may be schedule 40 carbon steel. The make-up water system in the vicinity of the blowdown tank is believed to be BPVC. The make-up water system piping in the vicinity of the former ecology tank / new separator tank is believed to be schedule 40 carbon steel. Installation of the piping and fittings mating to the make-up water system shall conform with the standards of ASME B31.1

1.34 All uninsulated steel piping shall be painted black to resist the formation of exterior surface corrosion.

1.35 The contractor shall provide supports for all new piping (and any sections of existing piping requiring additional support specifically addressed in this specification). The design of the supports shall be in accordance with MSS-58 and the maximum spacing of the supports shall not exceed standards provided in ASME B31.1.

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Flanges:

1.36 All flanges shall be class 150, of the raised face type, and manufactured from ASTM A105 steel. Flanges shall be socket weld neck, meeting the standards of

ASME B16.5.

Gaskets:

1.37 All gaskets used in the flanged connections shall be spiral wound 304 stainless steel with graphite filler, conforming with the standards of ASME B16.20

Insulation:

1.38 All piping, valves, fittings, and tanks shall be insulated to minimize thermal energy loss and to protect personnel from coming into contact with hot surfaces. The tanks shall be insulated by the manufacturer(s) (using their preferred insulation) or by the contractor, using 1 1/2” thick cellular glass insulation conforming with the standards of ASTM C552). All insulation on the tanks shall be removable / reusable to facilitate maintenance and inspections. For piping, fittings and valves, shown in the P&D for the new blowdown configuration that are 1”-2” use 1” thick cellular glass insulation (if not existing pipe that is already insulated). Pipes 2 ½”- 8” shall be insulated with 1 ½” thick cellular glass. The cellular glass insulation shall be rated for a minimum of 450°F and shall be noncombustible, impermeable to water, hydrocarbon resistant, vermin resistant, and resilient to impacts (without taking a permanent deformation). All insulation shall be covered with jacketing that is noncombustible, impermeable to water, hydrocarbon resistant, vermin resistant, and resilient to impacts (without taking a permanent deformation). Paper jacketing is not acceptable.

Labeling:

1.39 The origin of the fluid in the piping under newly installed insulation shall be labeled (e.g. HRSG #1 Continuous Blowdown, Bottom Blowdown from HRSG #1 and HRSG #2). The contractor shall stencil the labelling onto the insulation jacketing, using a minimum of 1” high Arial font lettering and a paint that contrasts the color of the jacketing. Labels shall be located within 10 ft. of the tanks, and at every tee or wye wear blowdown from one unit combines with blowdown from another.

Labels shall be oriented so as to be visible to personnel standing on the nearby working surfaces.

1.40 The contractor shall label all new valves with an engraved tags made from anodized aluminum. The contractor shall consult with the Power Plant General Foreman to determine the identification number for each valve. The contractor shall update the as-built P&ID drawing to reflect the valve identifications.

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Distributed Control System:

1.41 The contractor shall modify the Distributed Control System (DCS) to provide an audio alarm and a visual warning message on the operator interface screens in the Control Room to indicate a high level alarm in the blowdown tank.

1.42 The contractor shall modify DCS operator interface in the Control Room to remove all features related to the operation and monitoring of the demolished blowdown control valves.

Hydrostatic Testing:

1.43 All portions of the newly piping system that can be exposed to 200 psi blowdown water, depending upon the valve line-up, shall be hydrostatically tested in accordance with ASME B31.1, paragraph 137.4. The minimum test pressure shall be 300 psi, but shall not exceed the maximum allowable test pressure for any components exposed to the test. The blowdown tank, separator tank, and make-up water system shall be isolated from the hydrostatic test(s) of the piping system.

1.44 The contractor shall submit a hydrostatic test plan as part of his or her submittals.

2.0 BASIS OF BID:

The contractor shall provide a firm fixed price for each work item and reflect the value of the material, labor and equipment with a line item total by completing the attached proposal form.

3.0 GENERAL REQUIREMENTS:

All work performed by the General Contractor shall be in accordance with the requirements specified in herein and the project specifications and all local, State and Federal Codes.

The means and methods of work associated with this project shall be in accordance with the tasks specified on the enclosed contract documents and the following general requirements:

3.1. Division 01 - General Requirements Specification

All requirements of Division 01 apply to this project unless otherwise noted herein or other contract documents or if means and methods do not invoke the requirement (i.e.: no confined space, no hazardous waste, etc.). Refer to the Attachment 4 Submittal Register for additional items that do not apply which are not otherwise explicitly identified as such herein.

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3.2. The Contractor shall coordinate all work to permit Navy/Facility Operations to be performed during the course of work. Delay claims due to periodic work stoppages or changes in work sequence based on impacts from Shipyard/Facility operations will not be allowed. The Contractor may need to work outside normal work hours and /or weekends to ensure Shipyard/Facility operations are not impacted.

3.3. All work shall be fully coordinated with the Contracting Officer’s Representative and PWD-ME and shall comply with all Work Restrictions specified in Specification Section 01 14 00.00 22 (PNSY).

3.4. Contractor shall provide all supervision, labor, materials, tools, equipment, and transportation necessary to perform tasks within this project.

3.5. Utility Locating Requirements:

The Contractor shall locate all utilities within the limits of ground penetrating work as specified in Specification Section 01 35 26.00 22 (PNSY).

The contractor shall provide the services of a qualified independent utility locating company/person(s) (Cannot be the Government’s Utility Locating Firm).

The utility locating company shall indicate the utility type, size, and depth of all utilities within the proposed area of excavation including, but not limited to, voice/data, electrical, gas, water, sanitary sewer, and storm drainage.

The Contractor shall be responsible for any damage to underground utilities which occur during excavation or ground penetrating work.

The contractor/excavator shall notify Dig Safe (1-888-344-7233) within 14 calendar days, but no more than 30 calendar days, prior to the start of excavation or ground penetrating activity. The contractor/excavator shall comply with the State of Maine “Dig Safe” law (Title 23, MSRA 3360-A). If there are any questions regarding the Dig Safe process or underground utilities, contact the Contracting Officer Representative.

The contractor shall provide the services of a qualified independent utility locating company/person(s) to locate any utilities within or under the floor. If a roofing project, all utilities shall be located below the roof before making any roof penetrations.

3.6. Utilities Within and Under Concrete Slabs, Bituminous Asphalt and Other Impervious Surfaces:

Utilities located within and under concrete slabs or pier structures, bridges, parking areas, and the like, are extremely difficult to identify. Whenever contract work involves chipping, saw cutting, or core drilling through concrete, bituminous asphalt or other impervious surfaces, the Contractor shall provide the

Page: 17 of 24 services of a third party, independent, private locating company to locate any utilities within the limits of work. The third party, independent, private locating company shall locate utility depth by use of Ground Penetrating Radar (GPR), X-ray, bore scope, or ultrasound prior to the start of demolition and construction.

Outages to isolate utility systems must be used in circumstances where utilities are unable to be positively identified. The use of historical drawings does not alleviate the contractor from meeting this requirement.

3.7. The Contractor shall ensure work is conducted and completed in such a manner to allow access for emergency response vehicles throughout the construction period.

3.8. Contractor Laydown Space:

Contractor lay down space is to consist of an area negotiated with the Construction Manager and the Power Plant General Foreman. It is not anticipated that the contractor will require significant laydown space. Any additional space required to complete this work must first be approved by the Contracting Officer.

3.9. The Contractor shall dispose of all removed materials in accordance with the Shipyard/Facility, local, State and Federal regulations.

3.10. Concrete Work

Special attention must be paid to any/all concrete work in/around Dry Docks.

Controls must be provided to ensure that concrete material (i.e., concrete debris, dust, concrete sawing waste water, wash water, curing water, and storm water in contact with curing concrete) does not enter the closed drainage systems of any Shipyard dry dock. Also, elsewhere onsite, concrete material (as stated above) should be prevented from entering any drainage structure.

3.11. For any work on or in a dry dock or pumpwell

Not applicable.

3.12. For any work working inside of or within 10 feet of the coping of the dry dock and its associated structures

Not applicable.

3.13. Site Work Requirements:

A. For any Site work projects in the State of Maine:

a. Site work in the State of Maine Shoreland Zone, including any filling, excavation, landscaping, and/or other earthwork in excess of one cubic yard of disturbance, shall comply with State of Maine requirements for certification in erosion and sediment control practices. A certified

Page: 18 of 24 individual shall be responsible for management of erosion and sediment control practices at the site each day earth moving activities occur. A certified individual is required to visit the site every day to ensure proper erosion and sediment control practices are followed. As an alternative, the Contractor may choose to contract with a certified individual to supervise the Contractor's work in Shoreland areas. Under the State of Maine's Shoreland Zoning Statutes, the Portsmouth Naval Shipyard, Cutler Naval Support Activity & Prospect Harbor Facilities are located within the state's Shoreland zone.

b. Erosion and sediment control measures shall be installed and maintained in accordance with Maine Erosion and Sediment Control Law and Maine Erosion and Sediment Control Practices Field Guide for Contractors, latest edition. Erosion control inspections are required both before and after a precipitation event that has the potential to create runoff and at least weekly at a minimum. Contractor shall provide inspection reports to CM electronically weekly.

B. The Contractor shall restore disturbed areas surrounding limits of work to original conditions. Reuse the existing soil material, if considered suitable, to the greatest extent possible, and compact in accordance with technical specifications. Suitable backfill material shall be fine readily compressible soil or granular material, at or near optimum moisture content, and shall not contain stones larger than 3 inches, frozen lumps, chunks of clay, mineral matter, or any other objectionable material.

C. Any pavement and pavement markings removed or disturbed by the construction shall be replaced in-kind.

D. During construction, the Contractor shall provide sediment erosion controls and dewatering controls to ensure that excavation material (i.e., debris, dust, silted or contaminated water, storm water) does not enter any drainage system. Erosion and sediment controls shall be installed and maintained in accordance with applicable state Best Management Practices appropriate for the site conditions.

E. Construction dewatering shall comply with Section 31 23 00.00 22 and State of Maine erosion and sediment control requirements and State water quality standards. Dewatering discharges shall be re-infiltrated within the project limits unless written permission is granted by the Government for an alternative method. Dewatering discharges shall not be released to the storm drain system.

Any excess soils shall be sampled & tested by the Contractor. Once the sampling has been reviewed by Code 106.3, the Contractor shall transport the soils to a licensed disposal facility

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The Contractor shall comply with the requirements specified in Section 31 23 00.00 22 for Soil Management and Disposal requirements. All soil sampling shall be coordinated with Code 106.3. Code 106.3 shall be notified at a minimum of 7 business days in advance of desired soil sampling event to allow Code 106.3 to be present during the sampling. No Soils can be removed from PNSY without approval from Code 106.3.

4.0 PERIOD OF PERFORMANCE:

PERIOD OF PERFORMANCE 270 Calendar Days

The Contractor shall mobilize and commence work as soon as reasonably feasible from date of contract award but not more than 4 weeks after award.

5.0 NOTIFICATION OF COMMENCEMENT:

The Contractor shall arrange and hold a pre-construction conference with all interested parties prior to start of work. All prerequisite submittals as listed herein in the “Submittals” paragraph shall be submitted at this pre-construction conference. The Contractor shall confirm the construction start date with the Contracting Officer Representative at least 48 hours prior to start date. Preparing and sending minutes of all meetings to the attendees are the responsibility of the Contractor.

6.0 DESIGN:

7.0 WINTER CONSTRUCTION CONDITIONS:

8.0 HAZARDOUS MATERIALS:

The following hazardous materials are either known or assumed to be present within the work area based upon recent tests coordinated by PWD-ME or from review of record documents. The Contractor shall provide means and methods of work in conformance with all applicable local, State, Federal, and Shipyard Regulations pertaining to working within or near these materials

8.1. Hazardous Soil: The contractor is not expected to encounter hazardous soils.

8.2. Asbestos: Asbestos was detected in the roofing materials of the failed roof over the flash tank. The contractor shall also test the gaskets between the flanged connections on the flash tank vent stack. If asbestos is present in these joints, the contractor shall disassemble the stack by cutting the stack above and below the joints, and disposing of the sections containing the joints using the appropriate

Page: 20 of 24 containments and controls. Note: The pipe lengths shall be no longer than 5 ft for disposal. The contractor shall utilize the appropriate controls in accordance with all pertaining Federal and State laws, codes, and regulations to completely abate the asbestos from these areas.

8.3. Lead Paint: It is unknown if the contractor will encounter lead paint during the performance of this work. For any operations where paint will be dislodged the shall test the surface to verify whether or not lead paint controls are necessary. If necessary, the contractor shall employ the appropriate controls in accordance all pertaining Federal and State laws, codes, and regulations.

8.4. Zinc Oxide: The flash tank vent pipe is believed to be galvanized. If so, and if it is to be thermally cut, the contractor shall employ exposure controls to prevent Zinc oxide fume ingestion, in accordance with all pertaining State and Federal laws, codes, and regulations.

8.5. Feedwater Chemicals: There known chemicals in three of the feedwater tanks, manufactured by Betz Dearborn, are Cortol IS104, Optisperse PO423, and Optisperse ADJ561. The contents of the fourth tank are unknown. The contractor will need to obtain the SDS sheets for each of the known chemicals and sample the contents of the fourth tank to determine what controls are necessary for safe remediation of this area.

9.0 CODE/REGULATORY REQUIREMENTS:

All work performed by the General Contractor shall be in accordance with the requirements specified in the Project Specifications and all local, State and Federal Codes.

10.0 ENVIRONMENTAL PROTECTION REQUIREMENTS:

10.1. The Contractor shall ensure compliance with the requirements related to Concrete Wash Water specified in Specification Section 01 57 19.00 22.

11.0 CULTURAL AND NATURAL RESOURCE REQUIREMENTS:

The Contractor shall include the following in their means, methods, and scheduling of work:

11.1. In the event that archaeological resources are identified during construction, work shall stop immediately and notify the Contracting Officer and PWD-ME ENV (Kerry Vautrot, 207-438-4488) for further direction. Work shall not resume until directed by the Contracting Officer to proceed.

11.2. The proposed project is located within an area of archaeological sensitivity and archaeological monitoring by an archaeologist meeting the Secretary of the

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Interior’s Professional Qualifications and on the Maine approved list is required to be onsite during all ground disturbing activities within this area. The Contractor shall ensure compliance with the requirements related to Specification Section 01 44 00.22 (Archaeological Monitoring PWD ME).

Any modifications to the proposed action must be reviewed and approved by PWD-ME ENV prior to implementation.

12.0 SITE SUPERVISION:

The Project Site Superintendent shall have experience as a superintendent on projects similar in size and complexity. The individual must be familiar with the requirements of EM 385-1-1 and have experience in the areas of hazard identification and safety compliance. The individual must be capable of interpreting a critical path schedule and construction drawings. The qualification requirements for the alternate superintendent are the same as for the project superintendent.

The Project Superintendent shall be on site during working hours. The Superintendent cannot be the Quality Control Manager nor the Site Safety and Health Officer (SSHO).

Approval of the on-site Project Superintendent by the Contracting Officer is required prior to start of construction. Provide resumes for the proposed on-site Project Superintendent describing their experience with references and qualifications to the Contracting Officer for approval. The Contracting Officer reserves the right to interview the proposed on-site Project Superintendent at any time in order to verify the submitted qualifications.

13.0 SAFETY:

The Contractor shall provide a competent Site Safety and Health Officer (SSHO) in accordance with the requirements specified in Specification Section 01 35 26.00 22. The SSHO may not perform the duties of the Site Superintendent. The SSHO may perform the duties of the QC Manager.

The Contractor shall be responsible for maintaining a work site compliant with EM 385-1-1 Safety and Health Requirements Manual (Latest Edition), including latest errata and changes) and all other OSHA regulations associated with the completion of the work.

14.0 QUALITY CONTROL:

Provide a Site QC Manager to implement and manage the QC Program. The QC Manager must have combined experience as a superintendent, inspector, QC Manager, project manager, or construction manager on similar size and type construction contracts which included the major trades that are part of this contract. The individual must be familiar with the requirements of the EM 385-1-1 and have experience in the areas of hazard identification and safety compliance.

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The QC Manager may perform the duties of the SSHO. The QC Manager may not perform the duties of the Site Superintendent.

15.0 MEASUREMENTS:

Contractor shall verify all measurements in the field prior to starting work. Coordinate with the Contracting Officer Representative when scheduling visits to the site prior to construction activities.

16.0 CLEANUP:

Contractor shall clean up the job site daily, and shall use his or her own equipment to clean the work area to the satisfaction of the Contracting Officer Representative. Upon completion of project work, contractor shall clean the work area free of equipment, tools, materials, trash, debris and dust. Upon site stabilization as defined by State and Federal erosion and sediment control laws, all temporary erosion and sediment controls shall be removed and disposed of in accordance with State and Federal disposal regulations.

17.0 SUBMITTALS

Provide submittals as defined in the contract documents in accordance with Specification Section 01 33 00 Submittal Procedures.

For any projects that are awarded with a contract value of greater than $150,000, the Contractor shall utilize NAVFAC’s Electronic Construction & Facility Support Contract Management System (eCMS).

See Section 01 31 23.13 22 for eCMS requirements. The eCMS can be accessed at http://wl001.uat.navfac.us/cmicuat/SdMenu/. The administrator will provide a user name and password to log in.

The eCMS Processes & Procedures can be found at https://www.navfac.navy.mil/content/dam/navfac/Capital%20Improvements/PDFs/ci_ecms _processes_contractors.pdf.

18.0 AVAILABILITY AND USE OF UTILITY SERVICES

The following utilities will be made available to the Contractor without charge:

Electricity Potable Water Tool air

See Specification Section 01 50 00 for additional requirements.

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19.0 ORDER OF PRECEDENCE:

In the event of conflict or inconsistency between any of the requirements included in the scope of work outlined herein conflict with the attached Div 1 Specs or the Div 1 Specs included in the original IDIQ Contract, the task order requirements will take precedence.

20.0 FACILITY TURNOVER PLANNING MEETINGS (NAVFAC Red Zone - NRZ)

The Contractor shall meet with the Government to identify strategies to ensure the project is carried to expeditious closure and turnover to the Client in accordance with Specification Section 01 30 00.00 22. Start the turnover process at the Pre Construction Conference meeting and convene at the Facility Turnover Meetings once the project has reached approximately 75 percent completion or three to six months prior to Beneficial Occupancy Date (BOD), whichever comes first.

See Appendix A of Section 01 30 00.00 22 for an example of the Facility Turnover Planning Meeting Agenda, NRZ Checklist & POAM.

21.0 OPERATION & MAINTENANCE MANUALS

The Contractor shall submit O&M Manuals in accordance with Specification Section 01 78

00.00 22. Contractor shall provide three (3) hard copies and two (2) electronic copies on CD’s of the operation and maintenance manuals. Data shall be submitted for final approval no later than 30 calendar days prior to project completion. Operation and Maintenance Manuals shall be consistent with manufacturer’s standard brochures, schematics, printed instructions, general operating procedures, and safety precautions.

For this Project the following Data Packages are required for the following equipment:

1. Blowdown Tank Data Package No.__2__

2. Separator Tank Data Package No.__2__

22.0 eOMSI

23.0 INTERNAL SERVICE REQUIREMENTS LIST

24.0 WARRANTY MANAGEMENT PLAN

The Contractor shall submit a warranty management plan in accordance with Specification Section 01 78 00.00 22 at least 30 days before the planned pre-warranty conference, submit the warranty management plan for Government approval.

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25.0 AS-BUILTS/ RECORD DRAWINGS

The Contractor shall provide Record Drawings in accordance with Specification Section 01 01 78 00.00 22.

26.0 ATTIC STOCK/SPARE PARTS DATA

27.0 DD FORM 1354 - REAL PROPERTY RECORD CARD

28.0 TRAINING

29.0 ADDITIONAL INFORMATION

END