Exhibit #5. X-670 Recirculated Cooling Water (RCW) Cooling Tower and associated piping to X- 710 and X-300

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2 Exhibit #5 X-670 Recirculated Cooling Water (RCW) Cooling Tower and associated piping to X- 710 and X-300 Recommended System Cleaning and Flushing program Acceptance criteria: Total suspended solids: 0.005% by weight 50 PPM (Max) Maximum suspended particle size CaCO 3 <1 Micron (Max) <1 ppm LSI (Langelier Saturation Index) ph Fe 2 O 3 (during flush cycle) Inhibited glycol concentration (by volume) <10,000 ppm 40% (Min) 1.0 General Information: Fluor B&W Portsmouth proposes to Drain, Clean and restore the X-670 supply and return Recirculated Cooling Water (RCW) pipe system and the X-670A cooling tower to fully operable condition by performing the following tasks: Organizational Reference: Sections 2.1 through 2.41 provides general breakdown of work steps. 2.0 Work Steps Sections 3.1 through 3.41 provides details of work step requirements. 2.1 Setup one (1) Temporary storage container north of X-670A and connect hoses to drain the cooling tower coils and cooling tower manifold piping. 2.2 Close Cooling Tower isolation valves (V60, V61, V62, and V63). 2.3 Drain/Pump glycol solution from cooling tower coils and manifolds. 2.4 Install cooling tower bypass piping, remove cooling tower supply and return pipes and install flushing blind flanges. pg. 1

3 Contractor can now begin cooling tower coil removal and replacement 2.5 Evaluate concentration of metallic contaminants in pipeline and EQ tank. If contaminant concentration is too high, drain and pre-clean EQ tank before recirculation flush to protect pump internal seals, impellers and bearings from excessive abrasion by internal contamination 2.6 Turn pumps on (circulate system to suspend particulates). 2.7 Drain entire X-670 pipe system including Equalization tank for offsite disposal. 2.8 Perform RCW pipe modifications: Install larger pipe flushing connections (1-6, 2-2 ) Install new ports for injection/collection (6-2, 1-1 ) Install tees, valves with blind flanges for Filter connection (2). One blind flange will have 6 eccentric outlet for fluid recovery D-4) Install after cooler bypasses (4) Install compressor bypasses (4) Install X-670 Chiller Bypass (bypass not needed at X-300 or X-710 chillers). 2.9 Fill entire X-670 RCW pipe system and Equalization tank with X-626 cooling water& recirculate for 8 hours Drain entire X-670 RCW pipe system and Equalization tank to temporary storage tanks for offsite disposal Refill entire RCW pipe system and Equalization tank with X-626 cooling water Perform mechanical scouring 9OR ICE PIGGING) for the entire X-670 RCW pipe system (NIC Cooling Towers coils) Close X-670 RCW valves V118 & V119, separating X-670 from the RCW distribution pipe system Drain the X-670 piping and Equalization tank (RCW distribution system to X-300 & X-710 will remain full of water after pigging/scouring) Manually clean the Equalization tank and dispose of sludge and sediment waste Perform Equalization tank modifications (piping and screens). pg. 2

4 2.17 Insert Hexa-cover tank floats in EQ tank and insure that they are properly spread across the Equalization tank floor Remove blind flanges for future filter connection and connect boiler. Fill boiler with approved sanitary water and pre-heat to F Refill entire pipe system including Equalization tank with approved water and add cleaning chemical(s). Circulate heated cleaning solution for a minimum of eight (8). Test and repeat cleaning as many cycles as required to meet acceptance criteria. Test certification required that Fe2O3 concentration in passivation water is at/below 10,000 PPM Drain the entire X-670 RCW pipe system and Equalization tank for offsite disposal Refill the entire X-670 RCW pipe system and Equalization tank with X-626 cooling water. Add Passivation chemical(s) to treat the interior of the piping and circulate in X-670 piping Drain the entire X-670 RCW pipe system and Equalization tank to temporary storage tanks for offsite disposal Remove bypasses and install permanent pipe to the X-670 chiller, X-670 after coolers #1-#3, X-670 Compressors #1-#3 (X-670A cooling tower bypasses stay in place for now) Remove temporary boiler used during cleaning and passivation process and replace blind flanges Fill the entire X-670 RCW pipe system and Equalization tank with approved water. Use X-626 cooling water if PPM low enough suspended solids, otherwise use sanitary water) Circulate the system for a minimum of four (4) hours to suspend passivation chemical residue. Drain the entire X-670 RCW pipe system to remove flush water to temporary storage tanks for offsite disposal Fill the entire X-670 RCW pipe system and Equalization tank with approved water and circulate for 8 hours minimum Test water in piping to determine suspended solids < 50 ppm; if necessary, repeat steps 2.25, 2.26 and 2.27 until water meet acceptance criteria. Contractor certification required that final suspended solids in test water are less than 50 PPM. pg. 3

5 2.29 Drain the X-670 Supply and Return headers, Equalization tank and the X-670A cooling tower manifolds and close cooling tower isolation valves V60, V61, V62, and V63 (The RCW distribution pipe system will remain full) Remove all temporary bypasses Inspect and manually clean interior of cooling tower header to cooling tower coil pipes (if not done previously during removal and replacement of cooling tower coils Install cooling tower header to cooling tower coil pipes that connect cooling tower coils to the cooling tower East and West supply/return manifolds Chemically flush and clean cooling tower coils, headers piping and drain for disposal at the X-626 cooling tower basin Refill flush tank with clean water and recirculate through coils to remove cleaning chemical residue. Drain water back to flush tank and dispose in X-626 cooling tower basin Refill flush tank with clean water and add passivation chemicals. Circulate passivation solution through coils for 48 hours. Drain passivation solution back to flush tank and dispose at X-626 cooling tower basin Open the X-670A Isolation Valves V60, V61, V62, and V Add full strength inhibited propylene glycol and corrosion inhibitors to the X-670 Equalization tank and at flushing inlets along the X-670 RCW pipeline to reach a final distributed glycol solution concentration of 40% (minimum) Add additional water and/or Glycol as needed to complete system filling and continue circulation Perform complete visual system leak test at system normal service pressure & flow. Document leak test results for final acceptance documentation 2.40 Perform system startup and test for cooling tower and RCW pipe system using final 40% Glycol concentration. 3.0 Detailed Work Step Requirements. Note: Before starting cleaning and flushing operations, the Contractor will obtain sufficient temporary liquid storage containers, and position them at key locations to support the flushing pg. 4

6 and cleaning program. These containers will be used as temporary storage for X-670 flush, pigging and drain water waiting testing for test results and approval for disposal in accordance with the Contractor s approved Waste Management Plan. 3.1 The Contractor will connect hoses between existing 1 cooling tower manifold drains shown on Drawing X M and one (1) temporary storage container to be located near the X-670A cooling tower. 3.2 The Contractor will close four Cooling Tower isolation valves (V60, V61, V62 and V63) to isolate the cooling tower from the X-670 RCW system. 3.3 The Contractor will drain/pump the existing glycol solution from the cooling tower and cooling tower headers into the temporary storage tank for testing and eventual offsite disposal Portable spill containment enclosures will be used at each pump/drain location to capture any spilled liquid for subsequent collection and disposal. Hold Point: Flour B&W will take samples for testing of cooling tower drain solution for RAD and independent laboratory testing. The contractor shall allow a minimum 7-day testing turnaround before liquids can be free approved for offsite disposal. 3.4 The Contractor will install bypass piping and cooling tower isolation flanges The Contractor will remove valves, spacers and header to cooling tower piping and install temporary bypass pipe (jumpers) connections between supply and return pipe manifolds. These bypass connections are on the east and west manifolds of the cooling tower per Drawing X-670A-2-M (Detail 1) (total of 2 bypasses) The Contractor will remove valves, spacers and manifold-to-cooling tower piping along the east and west sides of the cooling tower and install temporary blind flanges per Drawing X-670A-2-M (Detail 2) (total of 16 flanges) Once the cooling tower bypass jumpers and isolation blind flanges are in place, the Contractor will OPEN Valves V60, V61, V62 and V63 which will reconnect the cooling tower manifolds to the RCW system for flushing. 3.5 The Contractor should be aware that the RCW pipe system and X-670A cooling tower have undergone considerable low ph corrosion and that an indeterminate quantity of rust and pg. 5

7 ferrous based sludge is trapped within all pipelines and the EQ tank. The Contractor should investigate and make his own evaluation if the EQ tank warrants pre-cleaning to remove entrapped solids before initiating the initial recirculation flush. Excessive damage to internal pump components resulting from metallic sludge abrasion will be the responsibility of the Contractor. 3.6 Perform initial recirculation of existing glycol solution to suspend particulates The following valve conditions are required before proceeding: OPEN cooling tower isolation valves V61, V61, V61, V61 on the east and west side of the cooling tower (Re: drawing: X-670A-2-M and schedule drawing X M) OPEN X-670 main header valves V118 and V119 (Re: drawing SK M) CLOSE supply and return valves inside building X-710 (north and south) not shown on drawing OPEN X-710 South, X-710 North and X-300 Crossover valves (Re: drawing SK- E M) CLOSE X-670 Compressor/Chiller loop valves (V115 and V117) to prevent initial flush from passing into the X-670 compressor/chiller loop (Re: SK M) FBP Utilities Operations to operate all four (4) X-670 pumps to recirculate existing propylene glycol RCW throughout the system and maintain flush for 7-day period. Note: Contractor will comply with all FBP requirements and the handling/disposal requirements listed in the approved Contractor Waste Management Plan. Hold Point: Flour B&W will take samples for testing of RCW initial recirculation solution for RAD and independent laboratory testing. The contractor shall allow a minimum 7-day testing turnaround before liquids can be approved for offsite disposal. 3.7 The Contractor will drain/pump the entire system to and dispose of all liquids at an approved offsite waste treatment facility Draining/pumping will be performed from 1 and 2 drain valves located throughout the system. At certain locations, the temporary storage tanks can be pg. 6

8 connected directly to pipeline drains so water can be pumped/drained directly from the pipeline into temporary storage. In remote areas, a water collection truck, provided by the Contractor, will be connected to drains and water will be pumped/drained out of the pipeline. When full, the water transferred to temporary storage tanks Portable spill containment enclosures will be used at each pump/drain location to capture spilled liquid for subsequent collection and disposal An estimated quantity of 60,000 gallons of liquid will be removed from the X-670 RCW piping system and Equalization tank during this operation. This material will be removed by pumping or draining to temporary storage tanks. 3.8 Perform additions and modifications to system pipe The Contractor shall install three (2) 2 weld-o-let connections with threaded ball valves and male camlock connectors at locations I-2, I-3 (as shown on drawing SK- E M.). The Contractor will also install one (1) 6 flanged outlet with 6 BFV and 6 blind flange (I-4 as shown on drawing SK-E M The Contractor shall install eight (4) 2 weld-o-let connections with threaded ball valves and male camlock connectors (at locations shown on drawing X-670A-2-M and X-670A-3M). The Contractor shall install one (1) 1 weld-o-let connection with threaded gate valve and 1 x2 bell increaser and 2 male camlock connector (I-5) near the 20 x 12 reducer at the location shown on drawing SK-E M The Contractor will fabricate and install two (2) 18 flanged horizontal side connections with three (3) 24 BFVs and two (2) blind flanges in the supply pipeline west of building X-670. These connections will be used as future connection points for boiler/filter during recirculation. One 18 flange will have a 6 eccentric flanged outlet at pipe invert with 6 BFV and 6 blind flange. These flanges, valves and flushing connection are shown on drawing SK-E M and X M The Contractor will install temporary pipe bypass connections (Jumpers) at all four (4) X-670 Air Plant compressor after-coolers at locations shown on drawing X M and X M The Contractor will install temporary pipe bypass connections (jumpers) at all four (4) X-670 Air Plant compressors at locations shown on drawing X M and X M. pg. 7

9 3.8.6 The Contractor will disconnect existing fittings and install a temporary bypass connection (jumper) between the X-670 chiller supply and return lines as shown on drawing X M. 3.9 FBP Utilities Operations will assist the contractor to fill and circulate the RCW system to operations The following valve conditions are required before proceeding: OPEN crossover valves at X-710 (north and south) and near X-300A. (Re: drawing SK-E M) CLOSE supply and return valves inside building X710 (north and south) not shown on drawing OPEN the X main supply and return header valves V118 and V119 (Re: drawing: SK M) OPEN four (4) cooling tower isolation valves V-60, V-61, V-62 and V-63 on the east and west side of the cooling tower (Re: drawing: X-670A-2-M and schedule drawing X M) OPEN 10 compressor cooling loop valve V117 to allow flushing water to circulate throughout the compressor/chiller cooling loop (Re: drawing SK M) CLOSE 10 compressor cooling loop valve 115 to prevent flush water from damaging flow meter (Re: drawing SK M) OPEN the new 18 BFV installed in the new supply discharge pipe in Step Refill pipe system The Contractor will have FBP Utilities Operations operate the interconnection valves at the X-626 connection to fill the X-670 supply and return pipelines and the Equalization tank to 70% with cooling water. This operation, whenever needed, may require removing the single point LOTO to operate the valves. FBP Maintenance will reinstall the single point LOTO after filling is complete Inspect and verify pipe system The Contractor will inspect all connections, especially new bypass (jumper) connections for leaks and repair any leaks before proceeding. Submit a leak test inspection report to the CTR. pg. 8

10 Hold Point Verify that liquid level in X-670 Equalization tank is at least 70% full Recirculate water to flush system The Contractor will have FBP Utilities Operations start and run all four (4) pumps and recirculate flush water throughout the system for a minimum of 8 hours. This will provide 32 complete changeovers at highest possible velocity. Note: The Contractor will comply with all FBP handling and disposal requirements listed in the Contractor s approved Waste Management Plan. Hold Point: Sampling and testing of flushing liquids will be the responsibility of the Contractor. The Contractor will submit certified laboratory test reports to the CTR for approval before any waste liquids are removed from the site for disposal The Contractor will pump and drain the entire X-670 RCW pipe system and the Equalization tank to temporary storage and dispose of all drain liquids at approved offsite disposal Draining/pumping will be performed from 1,2 and 6 drain connections located throughout the system. At certain locations, the temporary storage tanks can be connected directly to pipeline drains so water can be pumped/drained directly from the pipeline into temporary storage. In remote areas, a water collection truck will be connected to drains and water will be pumped/drained out of the pipeline into a collection truck and, when full, the water transferred to a temporary storage Portable spill containment enclosures will be used at each pump/drain location to capture spilled liquid for subsequent collection and disposal The Contractor will remove 2 drain piping from the supply and return pipes west of building X-670 (I-1, I-7 on drawing X M). The Contractor will install 2 threaded ball valves with camlock male connectors. These camlock connections will be later used as injection/drain points during later flushing activities The Contractor will have FBP Utilities Operations refill the pipe system and Equalization tank with water to provide passive resistance for mechanical cleaning. pg. 9

11 FBP Utilities Operations operate the interconnection valves at the X-626 connection to fill the X-670 supply and return pipelines and the Equalization tank to 70% full with cooling water. Note: The following mechanical scouring is based upon the Company s selection of Ice Pigging using semi-solid ice plug to scour and collect solid and semisolid contaminants for ejection at 6 outlets identified as D3 and D4 on drawing SK-E M. If the Contractor selects and alternate method of scouring the RCW pipe interior, the activity description(s) and sequence may be changed to accommodate the Contractor s program. Whatever procedure the contractor selects to mechanically clean the interior of the RCW pips system, that cleaning procedure will be submitted to and approved by the Company before deployment Perform ice pigging for the entire X-670 RCW pipe system (not including the cooling tower or Equalization tank) (18 pipe X-670 to X-710 south and 8 pipe at X-710 south Check and operate valves to setup ice pigging OPEN 18 valve V118 in the X-670 supply header (re: drawing X M) CLOSE 18 valve V119 in the X-670 return header (re: drawing X M) OPEN 10 BFV V117 to allow a portion of the flush water to return to the Equalization tank to replace source water for pigging (Re: drawing SK-E M) CLOSE 10 valve V115 to prevent ice pig from passing through the meter (Re: drawing SK-E M) CLOSE supply and return inlet and outlet valves inside buildings X-710 (north and south) not shown on drawing. pg. 10

12 CLOSE the crossover valves at and at X-710 north and X-300A (re: Drawing SK M) OPEN the 8 crossover valve between supply and return at X- 710 south (re: Drawing SK M) Ice pigging injection hose The Contractor will attach the 2 ice pigging injection hose to the 2 camlock male connection in the 18 X-670 supply pipeline Injection Point I-1 (re: drawing SK ) Ice pigging recovery hose The Contractor will attach the inlet end of the ice pigging recovery hoses (2) to the newly installed 6 BFV outlet in the 14 return pipe using a 6 x 2 true wye with two (2) 2 ball valves with male camlock connectors. This recovery station will be located opposite Building X-710 south and is identified as D-1 (Re: Drawing SK-E M) Connect the outlet end if both clear section of the ice pigging recovery hoses (2) to temporary storage tank using camlock quick couplers with sample ports. Hold Point Verify that liquid level in Equalization tank is at least 70% full before starting pump The Contractor will inject sufficient ice through inlet I1 into the 18 diameter supply pipeline to fill pipe and provide Ice pig in the 18 supply pipeline. Note: Ice pigging contractor will monitor the process and determine ice quantity requirements The Contractor will have FBP Utilities Operations operate one (1) pump. The Contractor will monitor the discharge through the recovery hoses until ice pig with contaminants is observed passing into the temporary storage tank. Once all contaminants are removed and pig discharge is clear, stop the pump and leave recovery hose assembly in place for next pigging activity. pg. 11

13 Portable spill containment enclosures will be used at the inlet and drain location to capture any spilled liquid for subsequent collection and disposal. Note: Ice pigging subcontractor will take samples of discharge at different stages to visually verify effectiveness of pigging operation. These samples will be dated and time stamped and turned over to the Contract Technical Representative (CTR) for further study. Note: During ice pigging process, maintain the water level in the Equalization tank by opening/closing the 10 valve V117 in the compressor/chiller bypass loop (re: drawing X M) (14 pipe X-710 south to X-710 north, 12 pipe at X-710 north. Also the 14 return pipeline between X-710 north and D1 & D2) Check and operate valves to setup ice pigging CLOSE the crossover valve at X-710 south OPEN the crossover valve at X-710 north to allow pig to be directed through X-710 north pipe system CLOSE the crossover valves at X-710 south and X-300A to prevent the ice pig from traveling from the 14 main pipe into X-710 south or into the 6 RCW pipe CLOSE 18 valve V119 in the X-670 return header OPEN 10 V117 to allow a portion of the flush water to return to the Equalization tank to replace source water for pigging CLOSE 10 valve V115 to prevent ice pig from passing through flow meter OPEN 18 valve V118 in the X-670 supply header Ice pigging injection hose The Contractor will attach the ice injection hose to the newly installed 2 camlock connection in the 14 supply pipe opposite building X-710 south as indicated as I-2 (Drawing SK- E M). pg. 12

14 Ice pigging recovery hose The Contractor will verify that the ice pigging recovery wye assembly is still securely connected to the 6 outlet D-1, D-2 (re: Drawing SK-E M). Hold Point Verify that liquid level in Equalization tank is at least 70% full before starting pump The contractor will inject sufficient ice into the 14 diameter supply pipeline through the camlock connection to fill pipe the 14 pipe and provide Ice pig for the 14 and 12 pipes. Note: Ice pigging contractor will monitor the process and determine ice quantity requirements Portable spill containment enclosures will be used at each inlet and drain location to capture any spilled liquid for subsequent collection and disposal The Contractor will have FBP Utility Operations operate one (1) pump. The Contractor monitor discharge through the clear sections of recovery hose until pig ice with contaminants is observed passing into the temporary storage tank. Once all contaminants are removed and pig discharge is clear, stop the pump and leave recovery assembly in place for next pigging activity. Note: Ice pigging subcontractor will take samples of discharge at different stages to verify pigging effectiveness (Note: the same sampling requirements are in place as detailed in ). Note: During ice pigging process, maintain the Equalization tank level at 70% by opening/closing the 10 compressor/chiller bypass loop (6 Supply pipeline X-710 north to X-300A and back to X-710 north. Also, the 14 return pipeline between X-710 north and D1, D2 & D3) Check and operate valves to setup ice pigging. pg. 13

15 OPEN crossover valve near the X-300A to allow pig to travel through 6 pipe and return CLOSE the crossover valves at X-710 south and north so pipes will remain filled with ice/water mixture and force ice pig into the 6 RCW pipe to X-300A CLOSE 18 valve V119 in the X-670 return header OPEN18 valve V118 in the X-670 Supply header OPEN 10 V117 to allow a portion of the flush water to return to the EQ tank to replace source water for pigging CLOSE 10 valve V115 to prevent ice pig from passing through flow meter (Re: drawing X M) Ice pigging injection hose The Contractor will attach the ice injection hose to the newly installed 2 camlock connection in the 14 supply pipe as indicated as I-3 (Drawing SK-E M) Ice pigging recovery hose The Contractor will verify that ice pigging wye recovery assembly is still securely attached to the 6 outlet fitting in the 14 return pipe opposite Building X-710 south D-1,D-2 and D-3(re: Drawing SK-E M). Hold Point: Verify that liquid level in Equalization tank is at least 70% full before starting pump The Contractor will inject sufficient ice into the 14 diameter supply pipe to fill pipe and provide Ice pig for the 6 and 14 pipelines. Note: Ice pigging contractor will monitor the process and determine ice quantity requirements. pg. 14

16 Portable spill containment enclosures will be used at each injection and drain location to capture any spilled liquid for subsequent collection and disposal The Contractor will have FBP Utilities Operations operate one (1) pump. The Contractor will monitor the discharge through the clear recovery hose until pig ice with contaminants is observed passing into the temporary storage tank through the clear sections of recovery hose. Once all contaminants are removed and pig discharge is clear, stop the pump and close the 6 BFV. Note: Ice pigging subcontractor will take samples of discharge at different stages to verify pigging effectiveness (Note: the same sampling requirements are in place as detailed in ). Note: During ice pigging process, maintain the Equalization tank level at 70% by opening/closing the 10 compressor/chiller bypass loop valve #117. Hold Point: Fluor B&W may also select samples of pigging discharge at the temporary storage tank for RAD and send samples to an offsite laboratory for analysis. The contractor will not remove and/or dispose of Ice pigging waste until authorized by the CTR Drain and disconnect the recovery hoses from the 6 wye outlet assembly on the 14 return pipe (D-1, D-2, and D-3). Leave all RCW pipes full of ice pig water for next pigging operation Remove the 6 wye recovery assembly and replace it with a 6 x2 companion flange with ball valve and male camlock connector (18 Return pipe from X-710 south back to X-670 return header) Check and operate valves to setup ice pigging CLOSE the 6 crossover valve near X-300A CLOSE the 18 main return header valve V OPEN the 18 main supply header valve V118. pg. 15

17 CLOSE crossover valves at X-710 south and X-300A OPEN crossover valve at X-710 north OPEN 10 BFV V117 to allow a portion of the flush water to return to the EQ tank to replace source water for pigging CLOSE 10 valve V115 to prevent ice pig from passing through flow meter (Re: drawing X M) Ice pigging injection hose The Contractor will connect the ice pigging injector hose to the cam lock connection (inlet I-4). This same location was used previously for discharge recovery during Ice pigging activities , and Ice pigging recovery hose The Contractor will remove the 6 blind flange from the future filter connection flange west of building X- 670 and attach the 6 wye recovery assembly removed from I-4 in step This connection is indicated by D-4 (re: drawing SK M) Connect discharge ends of both clear recovery hoses to a temporary storage tank located west of Building X-670. Hold Point: Verify that liquid level in Equalization tank is at least 70% full before starting pump The Contractor will inject sufficient ice into the 14 diameter supply pipeline at I4 to fill pipe and provide Ice pig for the 14 and 18 pipes. Note: Ice pigging contractor will monitor the process and determine ice quantity requirements. pg. 16

18 Portable spill containment enclosures will be used at each injection and drain location to capture any spilled liquid for subsequent collection and disposal The Contractor will have FBP Utilities Operations operate one (1) pump. The Contractor will monitor discharge into the temporary storage tank at the clear recovery hoses until pig ice with contaminants is observed passing through the recovery hoses into the temporary storage tank. Once all contaminants are removed and pig discharge is clear, stop the pump and close both 6 BFVs. Note: Ice pigging subcontractor will take samples of discharge at different stages to verify pigging effectiveness (Note: the same sampling requirements are in place as detailed ). Note: During ice pigging process, maintain the water level in the Equalization tank by opening/closing the 10 valve V-117 in the compressor/chiller bypass loop (re: drawing X M) The Contractor will remove the Ice pig injection hose from the 2 camlock connector at the 6 BFV at injection point I-4 and leave all RVW pipelines full of water The contractor will remove the 6 ice pigging recovery assembly from the future filter connection flange and replace the 6 blind flange and secure for leaks (12, 10, 8, and 6 X-670 compressor and chiller cooling pipes) Check and operate valves to setup ice pigging CLOSE the 18 supply valve (V118) CLOSE the 18 Return valve (V119) OPEN all 10, 8 6 and 4 service valves connected to the X-670 RCW cooling loop (Re: drawing SK-E M) CLOSE 10 valve V115 to prevent ice pig from passing through flow meter Ice pigging injection hose pg. 17

19 The Contractor will attach the ice injection hose to newly installed 1 inlet near the 20 x12 reducing tee in the supply header as indicated as I-5 (re: drawing SK M) Ice pig recovery hose Pigging will discharge into the 20 diameter return header pipe. No recovery hose will be needed for this pigging activity. Hold point Adjust the liquid level in the Equalization tank is at 50% to make room for Ice Pig return volume The contractor will inject sufficient ice to form a pig into the 20 x12 Tee. The Ice pigging contractor will monitor the process and determine ice quantity requirements The Contractor will have FBP Utilities Operations operate one (1) pump to push the ice pig through the compressor and chiller cooling pipe system. Discharge will be into the 20 return pipe, east of the Equalization tank. Since this pigging will discharge into the 20 diameter X-670 return header pipe, no visual verification that all contaminants have been removed is possible Continue injecting ice and operating pump until, based upon prior experience with previous pigging, the compressor/chiller loop is free of all contaminants Shut down pump leaving X-670 cooling system piping full of clean ice water mixture. pg. 18

20 (18, 20 and 12 pipes in X-670 return header and X-670A cooling tower east manifold pipe). Note: To pig the X-670 supply and return pipelines and the cooling tower manifolds, water must pass from X-670 through X710 north crossover and back, via the return pipe to X-670. The Ice Pig will be injected at the 2 drain connection (inlet I-7 on Drawing SK M). Pigging will occur inside the X-670 return and East cooling tower header pipes Check and operate valves to setup ice pigging OPEN 18 valves V118 and valve V119 in the X- 670 supply and return Headers OPEN the crossover valve at X-710 north CLOSE crossover valves at X-710 south and X- 300A to prevent water from traveling through the X-710 and X-300A pipe systems OPEN cooling tower return isolation valve on the east supply header of the cooling tower (re: valve V60 on schedule C M) CLOSE cooling tower supply isolation on the east header of the cooling tower (re: valve V- 62 on schedule X M) CLOSE both supply and return isolation valves (V61 and V63) on West side of cooling tower Ice pigging injection hose The contractor will attach 2 the ice pigging injection hose to the 2 return pipe drain connection west of Building X-670 (as indicated as I-7 on drawing SK M) Ice pigging recovery hose The Contractor will attach the recovery hose inlet to the newly installed 2 drain valve in the east cooling tower supply manifold pipe as identified as D-5 on drawing SK M. pg. 19

21 Connect the discharge end of the clear recovery hose to a temporary storage tank located near the X-670A cooling tower. Hold Point Check the Equalization tank level and refill to 70% before starting pump Inject sufficient ice into the 18 diameter return pipeline through the injection port (I-7) to fill pipe 18 pipe and provide Ice pig for the 18, 20 and 12 cooling tower pipes on the east side of the cooling tower. Note: The Ice pigging contractor will monitor the process and determine ice quantity requirements Portable spill containment enclosures will be used at each inlet and drain location to capture any spilled liquid for subsequent collection and disposal The Contractor will have FBP Utilities Operations operate one (1) pump. The contractor will monitor discharge through the clear recovery hose until pig ice with contaminants are observed passing into the temporary storage tank. Once all contaminants are removed and pig discharge is clear, stop the pump, close both 2 ball valves and remove the discharge hose from D5. Note: Ice pigging subcontractor will take samples of discharge at different stages to verify pigging effectiveness (Note: the same sampling requirements are in place as detailed in ). Note: During ice pigging process, maintain the water level in the Equalization tank by opening/closing the 10 valve V-117 in the compressor/chiller bypass loop (re: drawing X M) (18, 20 and 12 pipes in X-670 return and cooling tower West manifold pipe) Check and operate valves to setup ice pigging. pg. 20

22 OPEN 18 valve V118 and valve V119 in the X- 670 supply and return Headers OPEN the 8 crossover valve at X-710 north CLOSE crossover valves at X-710 south and X- 300A to prevent water from traveling through the X and X-300A 6 pipe systems CLOSE cooling tower supply isolation valve on the west supply header of the cooling tower (re: valve V63 on schedule C M) OPEN the return isolation valve on the west header of the cooling tower (re: valve V61 on schedule C M) CLOSE both supply and return isolation valves (V60 and V62) on east side of cooling tower Ice pigging injection hose The ice pigging injection hose will remain attached to the 2 return pipe drain connection west of Building X-670 (as indicated as I-7 on drawing SK M) Ice pigging recovery hose The Contractor will attach inlet end of the ice pigging recovery hose previously used on the 2 drain port in the east cooling tower supply manifold to the 2 drain port to the west cooling tower supply manifold as identified as D-6 on drawing SK M The Contractor will confirm that the outlet end of the ice pigging recovery hose is still connected temporary storage tank located near of the cooling tower. pg. 21

23 Hold Point Check the Equalization tank level and refill to 70% before starting pump the Contractor will inject sufficient ice into the 18 diameter return pipeline through the injection port (I- 7) to fill pipe 18 pipe and provide Ice pig for the 18, 20 and 12 cooling tower pipes on the west side of the cooling tower. Note: The Ice pigging contractor will monitor the process and determine ice quantity requirements Portable spill containment enclosures will be used at each pump/drain connection to capture any spilled liquid for subsequent collection and disposal The Contractor will have FBP Utilities Operations start and operate one (1) pump. The contractor will monitor discharge at the clear recovery hose until pig ice with contaminants is observed passing through the recovery hose into the temporary storage tank. Once all contaminants are removed and pig discharge is clear, stop the pump and close the 2 discharge ball valve at D6. Note: Ice pigging subcontractor will take samples of discharge at different stages to verify pigging effectiveness (Note: the same sampling requirements are in place as detailed in ). Note: During ice pigging process, maintain the water level in the Equalization tank by opening/closing the 10 valve V-117 in the compressor/chiller bypass loop (re: drawing X M) Drain and remove the recovery hose between the west cooling tower manifold and the temporary storage tank (X Cooling Tower east supply pipe to Equalization tank.) Check and operate valve to for ice pigging. pg. 22

24 OPEN supply and return isolation valves (V60 & V62) on east cooling tower header CLOSE supply and return isolation valves (V61 & V63) on the west cooling tower header pipes OPEN 18 valves V118 and V119 in the X-670 supply and return headers Ice pigging injection hose The Contractor will attach ice injection hose to newly installed 2 drain connection on the east cooling Tower supply pipe (Re: I-9 on drawing SK M) Ice pigging recovery hose The ice pig will discharge through the inlet of the Equalization tank inside Building X-670. No recovery hose needed. Hold Point Check the Equalization tank level and lower to 50% before proceeding to make room for returning ice pig volume the Contractor will inject sufficient ice into the east 12 cooling tower manifold pipeline to fill pipe and provide Ice pig for the 12 and 20 cooling tower supply pipe on the north end of the cooling tower. Note: Ice pigging contractor will monitor the process and determine ice quantity requirements Portable spill containment enclosures will be used at the injection location to capture any spilled liquid for subsequent collection and disposal The Contractor will have FBP Utilities Operations operate one (1) pump. The ice pigging contractor will pg. 23

25 monitor the process and determine ice quantity requirements. FBP Utilities Operations will operate the pump while the contractor monitors the liquid level in the Equalization until the pig with contaminants is heard passing out the 20 Equalization tank fill pipe. Note: During ice pigging process, maintain the water level in the Equalization tank by opening/closing the 10 valve V-117 in the compressor/chiller bypass loop (re: drawing X M) Once all contaminants are removed and a pig discharge turbulence ends, stop pump, close the 2 injection ball valve and move ice pig injection hose to the cooling tower supply manifold on the west side of the cooling tower (Re: I-8 on drawing SK-E M) (X Cooling Tower west supply pipe to Equalization tank.) Check and operate valve to for ice pigging OPEN supply and return isolation valves (V61 & V63) on west cooling tower header CLOSE supply and return isolation valves (V60 & V62) on the east cooling tower header OPEN 18 valves V118 and V119 in the X-670 supply and return headers Ice pigging injection hose The Contractor will attach ice injection hose to newly 2 injection connection on the west cooling Tower supply pipe (Re: I-8 on drawing SK-E M) Ice pigging recovery hose The ice pig will discharge through the inlet of the Equalization tank inside building X-670. No recovery pipe is needed. pg. 24

26 Hold Point Check the Equalization tank level and refill to 50% before proceeding to leave room for returning pig volume The contractor will inject sufficient ice into the west 12 diameter cooling tower supply pipeline to fill pipe and provide Ice pig for the 12 and 20 cooling tower supply pipe on the north end of the cooling tower. Note: Ice pigging contractor will monitor the process and determine ice quantity requirements Portable spill containment enclosures will be used at the injection location to capture any spilled liquid for subsequent collection and disposal The Contractor will have FBP Utilities Operations operate one (1) pump. The Contractor monitors the liquid level in the Equalization tank inlet until the pig with contaminants is heard passing out the 20 Equalization tank fill pipe. Note: During ice pigging process, maintain the water level in the Equalization tank by opening/closing the 10 valve V-117 in the compressor/chiller bypass loop (re: drawing X M) Once all contaminants are removed and pig discharge turbulence stops, stop pump, close the 2 ball valve, remove the ice pig injection hose and leave all pipelines full The Contractor will CLOSE main header valve V118 to isolate the RCW supply pipe from the X-670 internal pipe and provide double-block protection for work in the Equalization tank The Contractor will pump/drain the Equalization tank and 20 internal supply header pipe by pumping from the Equalization tank drain connection into temporary storage container or disposal truck. pg. 25

27 Portable spill containment enclosures will be used at each pump/drain location to capture any spilled liquid for subsequent collection and disposal. Hold Point: Fluor B&W will take samples of solids and sludge in the Equalization tank and test for RAD and send the samples to an offsite laboratory for analysis. The contractor will not remove and/or dispose of Equalization tank waste until authorized by the CTR. The Contractor will allow a minimum of 10-days for testing and authorization for removal from the site. Safety Note: Work inside the Equalization tank will require a confined space permit. The contractor will obtain all required permits and perform all work under a FBP Industrial Safety and Health requirements The Contractor will open the Equalization tank man-way flange and manually clean all sediment and contaminants from the Equalization tank and package for offsite disposal in accordance with the approved Contractor Waste Management Plan The Contractor will allow for special sampling and testing of materials inside the Equalization tank prior to free release. Certified sampling and test results will be submitted to the CTR for approval before release from the site The Contractor will contact the FBP Contract Technical Representative for final inspection of cleaning and washing inside the Equalization tank before beginning mechanical modifications to the outlet and overflow The Contractor will perform Equalization tank modifications including; filter return hose modification, install 20 outlet pipe screen and 20 overflow pipe screen (re: drawing X M) The Contractor will distribute Hexa-cover tank floats on floor of Equalization tank and close and secure Equalization tank man-way flange The Contractor will setup boiler in preparation for heated dispersant flush Remove two (2) 18 blind flanges west of X0670 and replace with 18 x 10 reducing flanges with isolation BFVs or as needed to connect boiler Connect boiler inlet and outlet hoses to connect boiler to RCW pipe system Fill boiler tank with sanitary water from the assigned hydrant. Start the boiler and begin heating reservoir water to degrees F. A backflow preventer will be supplied by pg. 26

28 FBP to complete this connection. Leave fire hose connected for future use to replenish system. Safety Note: Initiate special safety precautions when working with heated water to prevent injury by scalding Have FBP Utilities Operations operate valves to refill the X-670 supply headers and Equalization Tank with X-626 water Open the boiler inlet and outlet valves and let RCW water circulate into the heat exchanger Perform heated dispersant flush top remove loosened scale, sludge and iron contaminants Align valves for Dispersant flushing OPEN main header valves V118 and V OPEN Cooling Tower isolation valves V60, V61, V62 and V OPEN crossover valves at X-710 south, X-710 north and near X-300A OPEN all 10, 8, 6 and 4 compressor/chiller loop valves in X-670 (re: drawing SK-E M) CLOSE Supply and return valves inside building X-710 north and south walls to prevent dispersant from passing beyond crossover connections The Contractor will add chemical dispersant to the RCW system in 5-gallon increments in order to sustain a 100 ppm-300 ppm polymer residual concentration. Quantity will be based upon sampling results. Dispersant chemicals will be pre-approved by FBP The Contractor will start the boiler The Contractor will have FBP Utilities Operations start and run all four (4) pumps and recirculate system at maximum velocity for 8 hours to provide time for recirculated water to reach dispersant flush temperature of 1300 F. (It is estimated that initial heating of system to 1300 F will require approximately 8 hours). pg. 27

29 3/16.5 The contractor will have FBP Utilities Operations continue to recirculate dispersant chemical water through the RCW pipe system and X-670 Ciller/compressor cooling loop for a minimum of 48 hours while maintaining fluid temperature at F The contractor shall sample the dispersant fluids for Fe2O3 concentration before draining. If Fe 2 O 3 concentration exceeds 10,000 ppm, the contractor will drain the entire RCW pipe system and repeat steps 3.18 and 3.19 until the Fe 2 O 3 level is below 10,000 ppm before proceeding with the passivation treatment SAFETY Note: Observe all recommended chemical handling precautions as noted on the Manufacturer s Material Safety Data Sheets (MSDS) and as required by the approved activity-specific Job Hazard Analysis (JHA) for this activity. Note: The Contractor will comply with all manufacturers recommendations in the handling/disposal of cleaning and dispersant chemicals in accordance with the Contractor s approved Waste Management Plan The Contractor will drain/pump the entire X-670 pipe system and Equalization tank to temporary storage for testing and offsite disposal Portable spill containment enclosures will be used at each pump/drain location to capture any spilled liquid for subsequent collection and disposal. Hold Point: Sampling and testing of cleaning/flushing liquids: FBP will initially sample and test liquid for RAD. The Contractor will submit certified laboratory test reports to the CTR for approval before any waste liquids are removed from the site for disposal The Contractor will perform heated passivation treatment to RCW pipe system and X-670 internal cooling loop pipe sections The Contractor will have FBP Utilities Operations operate the interconnection valves at the X-626 connection to refill the entire X-670 pipe system and the Equalization tank to 70% full with X-626 cooling water. pg. 28

30 The contractor will add passivation chemicals to the system to provide a protective layer of oxide on the internal pipe surfaces to protect from future corrosion Check and operate valves to for passivation flush All system valves will remain open as with dispersant flush operation The supply and return valves inside building X-710 north and south walls will remain closed to prevent passivation solution from passing into the building chillers OPEN both 10 BFVs to connect the boiler heat exchanger to the RCW system for heated flush The Contractor will open hydrant valve for boiler makeup water The Contractor will start the boiler and check RCW temperature after 1 hour to verify that the boiler and heat exchanger are working The Contractor will have FBP Utilities Operations start one (1) pump and begin circulating the heated passivation fluids throughout the RCW pipe system and X-670 internal cooling system The Contractor start the boiler and will then measure RCW fluid temperature every 30 minutes maintaining the system temperature reaches F Once the system water temperature reaches F., the Contractor will sample water for ph and conductivity and note readings to the CTR for baseline values for future tracking The Contractor will continue heated circulation for a total of 48 hours maintaining flush temperature between F and the ph levels between 6.5 and 7.2. At the end of the passivation treatment, the contractor will collect samples of passivation/water solution and measure for ph and conductivity and note to the CTR values for tracking At the conclusion of the passivation treatment, the contractor will close the boiler connection valves, shut off the boiler, disconnect and drain both boiler tanks and return the Backflow preventer to FBP Utilities Operations. pg. 29