AWWA/NACE Condition Survey Inspection Report

Interior & Exterior Surfaces on the

Elevated Potable Water Storage Tower

Stratford (Forman Avenue)

Undertaken 1st November 2013

Prepared for: City of Stratford

Public Works Department 82 Erie Street, 3rd Floor Stratford, Ontario, Canada N5A 2M4 Attn: Mr. Mark Bouw, Water Resource Technician

383 B CR 4, R. R. 8 Picton, Ontario, Canada K0K 2T0 Phone (613) 476-6326 Fax (613) 476-3463 Cell (613) 847-5618 Email <katurneyconsult@sympatico.ca Website <www.miscoinspection.com>

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1 Scope

The scope of this report is to summarize the inspection findings of the exterior and interior condition of the elevated composite potable water tower. This report covers the inspection carried out on 1st November 2013, located in the City of Stratford, Ontario, Canada.

Inspection Services was required on this structure to:

• Review structural and footing conditions which would affect the structural integrity of the storage facility.

• Review the safety and security of the elevated tower and acceptance to Ontario Occupational Health and Safety Act, and including all conditions affecting equipment that enables or protects inspection and maintenance workers and prevents access to the tank by unauthorized people.

• Review coating system condition for both interior and exterior coatings. The report will include the condition and the lifespan of the existing coatings.

• AWWA/NACE Condition Survey is a visual inspection of the current condition of exterior coating surfaces prior to surface preparation using 5000 psi pressure washing @ 3” to 6” standoff. We would anticipate various levels of topcoat and levels of primer delaminating during the pressure washing process.

2 General

2.1 The owner of the tower is; The City of Stratford who retained the services of MISCO - Mulders Inspection Services Co. Ltd of 383B CR 4, R. R. 8, Picton, Ontario, Canada.

2.2 The scope of work required for this inspection includes:

• internal lining assessment (dry inspection-internal)(dry-exterior), visual inspection, photographic report and technical report, including full recommendations.

• review of all interior and exterior structural steel condition, • evaluation of the overall condition of the protective coatings. • third party testing on the existing coating, to establish if heavy metals

exist, namely Lead and Chromate pigments exist or not. If hazardous metals exist on the structure, the report will address containment should full removal be required on this project. This will be required prior to tendering the project.

The report will summarize the existing safety equipment and the necessary upgrades to meet the requirements of the current OH&S Regulations 145/00 and MOL Regulations.

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2.3 The owner’s site contact person (Mr. Mark Bouw) provided access and egress to the tower access ladder and internal upper walkway system. MISCO supplied one (1) NACE Certified Coatings Inspector. The owner supplied the required Confined Space Safety requirements for the duration of the inspection. The owner had their OH&S”Approved” fall arrest system, rescue davit arm and winch on the upper catwalk for rescue capabilities for the duration of our inspection. A full dry inspection was specified on the internal and external surfaces.

2.4 The senior inspectors utilized for this project was Mr. Keith A. Turney,

CET, NACE Certified, SSPC Certified and CWB, ACI.

2.5 The tower presently two (2) “Swan” Logos attached to the tower presently.

2.6 The tower construction is an elevated composite (concrete/steel) design – that has a welded water reservoir supported by a concrete pedestal structure. The water storage capacity is approximately 1.5 M.I.G or 5,700 m3.

2.7 The tower was manufactured by Landmark Structures (Ontario) Ltd. of

Burlington, Ontario, Canada. The tower was constructed in 1992 making the water tower 21 years old. The elevated tower is 158.98ft (48.47m) in height and 86.85ft (26.48m) in diameter.

2.8 During our inspection, it was indicated that this tower has never been

painted since original construction. The internal lining applied at that time (92) was a four (4) coat single solution vinyl paint system as specified under AWWA D102-78 (Internal Water Tower System). The exterior coating applied at the time (92) was an alkyd industrial primer and an alkyd industrial topcoat as specified under AWWA D102 (Outside Paint System).

2.9 For determining the overall condition of the protective coatings during the

inspection process, reference was made to ASTM D610/SSPC-Vis 2 (”Standard Method for Evaluating Degree of Rusting on Painted Steel Surfaces”). This standard was used to estimate the amount/distribution of blistering on the interior/exterior surfaces. This standard has twenty- seven black and white images (of spot, general, and pinpoint rust) that illustrate various distributions percentages (from 0.03% to 50%). The ”pinpoint” images are an objective way to illustrate the blister and corrosion defects.

The Rust Grade Range is from 10 (<0.01%) Smallest Amount vs. Rust Grade 1 (33 to 50%) Largest Amount. Full failure is at Rust Grade 0 (50% or Greater).

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The reading provides a visual assessment of the current condition of the tower. We are anticipating further coating removal through the pressure washing process.

2.10 During our inspection process we will evaluate the degree of coating degradation as it relates to the”Current Adhesion Value” of the existing coating system. We will determine the possibility of ”Overcoating vs Full Removal” of the existing coating. The field-test ASTM D3359 - Method ”A” - X-Cut” will be used when the existing coating thickness is greater than 5 mils (125 microns) DFT, which it is.

2.11 All structural steel members will be inspected reviewing corrosion cells,

connection details and possible defects, looking for any evidence of steel or concrete section loss on the overall surface area of the tower.

2.12 The water storage is acceptable for potable water storage. Full

chlorination was completed using the AWWA Disinfection Method Type 3, after all internal work was completed and all hatches sealed.

3 Inspection Findings 3.1 Interior Surfaces

3.1.1 The internal surfaces were inspected under the AWWA/NACE inspection guidelines for water storage facilities. The owner had arranged to clean out the tower prior to our inspector arriving on site. The internal surfaces were clean and fully visible for our inspection.

3.1.2 The Interior Lining is a four (4) coat single component vinyl coating

system. Typical specification would call for single coats 3 mils per coat for a total of 12.0 mils DFT. This internal lining is in good condition and has very minor general corrosion taking place on the internal surfaces. There is less than 1% of the total surface area showing any signs of coating failure, at this time. The general corrosion and pinpoint corrosion areas were typically on the wall and ceiling. Only minor spots on the lower bowl at this time. Photographs look like rust but this colour id due to the heavy surface staining on the lining, due to iron content in the water.

3.1.3 The Overall Blistering & Corrosion ranged from “0.03 to 0.1 % or Rust

Grade 8 -G" under ASTM D610/SSPC-VIS-2. As a result of minor general corrosion on the walls and some staining on the ceiling seams and edges. This protective lining is in good condition.

3.1.4 The internal welds were inspected for heavy rusting or undercutting. All

visible welds are in good condition showing no evidence of corrosion attack or section loss of the metal. There was no evidence of pitting

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occurring at the weld seams and roof seams. All internal welds are functioning as designed. There was no evidence of undercut welds, buckling or plate distortion taking place, at this time. All internal welds on the ceiling are lap seams as a result there is minor rust bleeding taking place at the seams.

3.1.5 The Ceiling on the internal surfaces of the tank is in fair condition. It was

noted that various ceiling panels have light rusting taking place at the lap joints and on the stiffener plates. This due to the seams did not receive full seal welds at the time of construction. Random lap joints are showing signs rust staining and bleeding. This due to poor edge coating on the seams. All new liners now have an additional 15 mils of coating specified on all welds, seams and edges to protect them better for long term performance.

3.1.6 The Walls on the internal coating surface are in good condition. The

walls appear to be clear of all erection angles. We would anticipate scab welds have been left behind and would require some grinding off when a new liner is required. It was noted that there is no evidence of striation (heavy rust stains) developing on the walls, due to unprotected steel. There are less than 1 % of the walls showing any signs of corrosion-taking place at this time.

3.1.7 The Floor & Cone on the internal surfaces are in good condition. It was

noted that various these areas have staining due to the hard iron content in the water supply. There is random general corrosion and pinpoint corrosion taking place at these locations but it is minimal. These locations should be repaired under a Maintenance Coating on the internal surfaces.

3.1.8 The Wet Riser and Internal Ladder on the internal surfaces are in good

condition. It was noted that this tower has a steel ladder for climbing to the floor for inspection. This internal ladder should be fully repaired under the Maintenance Repair as there is lots of corrosion occurring at this time.

The riser is in good condition and various corrosion locations should be repaired at the time of the Maintenance Repair work.

3.1.9 The Existing Coating Thickness (DFT) was tested under SSPC-PA-2 “Calibration of Gauge and Film Thickness Measurements” (DFT) readings on the internal surfaces ranged from: Floor 10.9 to 13.3 mils Lower Bowl 9.8 to 14.2 mils Ceiling (from Opening) 11.1 to 13.2 mils

Wet Riser 13.2 to 14.5 mils

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3.1.10 The internal lining is in good condition. The dry film thickness (DFT) are in the range anticipated for this age of a lining system. The internal lining should have coating repairs (maintenance coating) completed on the ceiling, walls, cone, floor, wet riser and internal ladder at the time when future work is completed. 3.1.11 During our entrance into the tower, there was no evidence of any anaerobic growth attached to the walls, which would have remained on the walls and floor.

3.2 Exterior Surfaces

3.2.1 The Concrete Bases are in good structural condition. There is no evidence of concrete spalling taking place at this time. There was no evidence of cracked concrete or damage due to poor compaction and settlement cracks. The concrete footing is in excellent condition. There was no evidence of concrete settlement around the tank.

3.2.2 There was suitable Drainage away from the concrete base of the tank, at

the time of our inspection. There was no evidence of water infiltration into the lower concrete base inside the tower.

3.2.3 The exterior coating is the original alkyd industrial primer and alkyd

topcoats. Typically the contractor would have had to apply two (2) coats of alkyd at 5 mils for a total of 10.0 mils DFT. This second coat would ensure full uniformity of the topcoat. The existing topcoat has started to chalk and fade (due to the type of coating) which is prone to Ultraviolet degradation. The topcoat has reached the end of its life cycle and should be upgraded.

3.2.4 The Exterior Surfaces - Roof is fabricated structural steel plates, which

were laser cut in the shop and then welded in the field. The plates have been welded together to form a continuous watertight shell for water tower. The plates and weld seams on the underside of the roof bowl are functioning, as designed. There is no evidence of welding undercutting or heavy rusting taking place at the welds. All plates are true with no indication of buckling or distortion taking place. All visually inspected weld seams are in good condition. The internal roof seams are lapped and as a result are not fully seal welded on the inside of the tank. This was typical of the tank builders; methods of construction.

The roof coatings are in poor condition. It was noted that we could see through the topcoat down to the intermediate or primer. The roof has had the greatest UV attack and as a result the roof has chalked and faded. Very minor general corrosion is taking place at this time. We would anticipate the majority of the topcoat coming off during the pressure

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washing phase of work. Various weld seams have minor corrosion taking place. The coating is showing high levels of Ultraviolet (UV) degradation and chalking taking place.

The Overall Blistering & Corrosion ranged from “Greater than 16% to 33 % or Rust Grade 2-G", as specified under ASTM D610/SSPC-VIS-2. The exterior surface – roof rating has been increased due to the heavy chalking and UV degradation to the roof area. The roof primer has good adhesion to the steel substrate.

Further levels of paint removal are anticipated during the pressure washing phase of work. We would anticipate greater than 75% up to 100%. We would anticipate approximately 50% of the primer coming off during the pressure washing process. This is only an estimate actual amounts will vary. Contractor is required to meet the standoff distance and whatever come off full surface preparation with respect to feather is required. The roof coating is an alkyd and therefore no heavy metals present in the coating.

3.2.5 The Exterior Surfaces - Walls is fabricated structural steel plates, which were bent and bumped to the circumference of the tower. The wall plates were fitted and pinned then welded together to form a continuous watertight shell for water tower. The plates and weld seams on the walls surfaces are functioning, as designed. There is no evidence of welding undercutting or heavy rusting taking place at the welds. All plates are true with no indication of buckling or distortion taking place. All visually inspected weld seams are in good condition. The wall seams are all fully seal welded from the inside and outside surfaces.

The wall coatings are in fair condition. It was noted that we could see light areas in the topcoat. The wall coating has less UV degradation vs the roof. The walls have minor corrosion (rusting) is taking place at this time and will require SSPC-SP11 surface preparation. We would anticipate the various amounts of topcoat and primer coming off during the pressure washing phase of work. Various weld seams have minor corrosion taking place. The coating is showing low levels of Ultraviolet (UV) degradation and chalking taking place.

The Overall Blistering & Corrosion ranged from “Greater than 3% to 10 % or Rust Grade 4-G", as specified under ASTM D610/SSPC-VIS-2. The exterior surface – wall rating has been increased due to the chalking and UV degradation and the anticipated topcoat coming off. The wall primer has good adhesion to the steel substrate.

Further levels of paint removal are anticipated during the pressure washing phase of work. We would anticipate greater than 50% up to 75%. We would anticipate approximately 25% of the primer coming off during the pressure washing process. This is only an estimate actual

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amounts will vary. Contractor is required to meet the standoff distance and whatever come off full surface preparation with respect to feather is required. The roof coating is an alkyd and therefore no heavy metals present in the coating.

3.2.6 The Exterior Surfaces – Cone is fabricated structural steel “I” Beam which is bent and bumped to the circumference of the tower. The cone plates were fitted and pinned then welded together to form a continuous watertight shell for water tower. The plates and weld seams on the cone are functioning, as designed. There is no evidence of welding undercutting or heavy rusting taking place at the welds. All plates are true with no indication of buckling or distortion taking place. All visually inspected weld seams are in good condition. The cone seams are all fully seal welded from the inside and outside surfaces.

The cone coatings are in fair condition. It was noted that we could see light areas in the topcoat. The cone coating has less UV degradation vs the roof. The walls have minor corrosion (rusting) is taking place at this time and will require SSPC-SP11 surface preparation. We would anticipate the various amounts of topcoat and primer coming off during the pressure washing phase of work. Various weld seams have minor corrosion taking place. The coating is showing low levels of Ultraviolet (UV) degradation and chalking taking place.

The Overall Blistering & Corrosion ranged from “Greater than 3% to 10 % or Rust Grade 4-G", as specified under ASTM D610/SSPC-VIS-2. The exterior surface – wall rating has been increased due to the chalking and UV degradation and the anticipated topcoat coming off. The wall primer has good adhesion to the steel substrate.

Further levels of paint removal are anticipated during the pressure washing phase of work. We would anticipate greater than 50% up to 75%. We would anticipate approximately 25% of the primer coming off during the pressure washing process. This is only an estimate actual amounts will vary. Contractor is required to meet the standoff distance and whatever come off full surface preparation with respect to feather is required. The roof coating is an alkyd and therefore no heavy metals present in the coating.

3.2.7 The existing coating was tested under SSPC-PA-2 “Calibration of Gauge and Film Thickness Measurements” (DFT) readings on the exterior surfaces ranged from: Roof 2.0 to 8.9 mils Dry Riser 5.3 to 12.5 mils Access Hatch 4.1 to 9.2 mils

Walls and Cone Typically 10.0 mils DFT

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3.2.8 The Floor Manway presently has a round 24” diameter – Galvanized Submarine Style Manway and is installed in the floor of the water tower. All elevated towers now require a manway be installed greater than 24” diameter for access and egress in to the water tower. The manway must be 24" diameter too meet the current requirements of OH&S. The tower requires two (2) access or rescue openings. The second opening is on the roof with 24” diameter roof access hatch. We would anticipate an aluminum ladder, safety stops, and transition “D” rings as part of the access ladder requirement. 3.2.9 The Landing Platforms (inside the pedestal) are fabricated structural

steel members welded together to form a continuous support structure for the landings and vertical ladders. There was no evidence of cracked or fatigue welds or deformed steel on the landings or wall anchor points.

All upper platform landing is in good condition. All connections are in good working condition. The aluminum grating is securely fastened to the platform support members.

3.2.10 The Concrete Shaft Walls are poured in place concrete wall c/w

reinforcing steel for structural support of the elevated dome. All slip form holes have been filled and repaired at the time of construction. There is no evidence of concrete degradation at this time.

3.2.11 The Dry Riser (Up through the Dome) is fabricated structural steel pipe (approximately 6’0) and welded together to form a continuous watertight column c/w ladder to access the roof. The pipe and seams on the dry riser are functioning, as designed. Throughout the dry riser area there is light corrosion and pinpoint corrosion taking place at this time.

The Overall Blistering & Corrosion ranged from “Greater than 3% to 10 % or Rust Grade 4-G", as specified under ASTM D610/SSPC-VIS-2. The condition of this area is random throughout. 3.2.12 The Tank Access Tube will require surface preparation and coating repairs to remove the existing corrosion around the concrete. Special attention around the bottom tube wall thickness to ensure full repair is completed. We would anticipate one coat of penetrating sealer and two coats of epoxy.

3.2.13 For establishing the overall condition of the existing coating we preformed the following tests on the roof section (which is the poorest condition). The roof location is representative of the poorest coating remaining on the tower. This would be representative of the overall condition of the elevated water tower.

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We executed the following test under ASTM D3359 - 87 “Standard Test Method for Measuring Adhesion by Tape Test” using the Cross Cut Guide Adhesion Tester to prepare this test. As a result of the test it was determined that the existing adhesion of the paint is a 2A or: which mean the coating: has jagged removal along most inclusion up to ½” on each side.

Conclusion: Therefore the adhesion on the primer is good and the majority of the topcoat will be removed. During the pressure washing phase of work on the tower we anticipate various levels of coating removal will occur. We would anticipate topcoat coming off greater than 75% (accumulate surface area) and up to 25% (accumulative) of primer may come off. All paint removal surfaces will require proper feathering at the paint-to-paint and bare steel to paint feathering. All additional surface preparation and feathering of the paint will be part of the contract. No additional fee will be paid for the grinding and feathering requirements. All paint flakes found on the ground will be collected and disposal of according to Ministry of Environment Regulations and Ministry of Labour Regulations. We would recommend this tower to be a good candidate for overcoating the existing coating using an “Approved Overcoating Specifications”.

3.2.14 The Lower Valve Chamber (Flanges/Couplers and Attachments) is fabricated with structural steel flanges, couplers and attachments. These structural components are showing signs of corrosion.

The valve chamber flanges, couplers, and attachments are in Good condition with minor flaking and light corrosion taking place. 3.2.15 The Entry Doors on the water will require repainting. We would recommend painting all doors on the tower including inside and outside surfaces and door jambs. The colour of the doors should match the colour of the topcoat on the tower. We would use the overcoating specification for these repairs; penetrating sealer, epoxy and two coats of urethane. 3.2.16 The Roof Mast which is presently on the tower is rusting noticeably. We would recommend repainting the mast or removing it and installing a new galvanized mast – capped both ends (so it will not rust at a later date)

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4 Safety Upgrades

4.1 The tower will require (1) One Safety Davit Base Plate – Roof Mounted - Horizontally and (1) One Safety Davit Base Plate – Side Wall Mounted at top of Vertical Ladder Run. Under current OH&S regulation requires that all elevated tanks must have a “Fall Arrest” protection system on the top of elevated structure.

This roof safety davit base plate would be used for accessing the internal of

the tank, with rescue capabilities. The internal shaft safety davit base plate would be used for lowering climbers off the ladder. With this system in-place the confined space requirements would be acceptable under OH&S.

The owner would be required to purchase the required Offset Mast c/w

mechanical ratchet c/w cable length to reach the ground. The davit base plate is to be offset 24" off of center of the roof hatch and 16”off the wall and vertically mounted.

4.2 The Short Ladder, Main Ladder, Dry Riser Ladder inside the steel

pedestal from the ground to the upper platforms is functioning as designed. The vertical ladders presently have the required TS Safety Rails. All safety-rail (TS) must be centered on the ladder.

4.3 The Transfer Stations (Three Required) are for allowing the climber to

move from the T-5 Slider to the landing or roof ensuring full 100% tie-off at all times. The tower requires “Engineered – 100 % Tie-off” attached to the internal wall and the roof. This will allow the climber to use his/her lanyard to transfer to the next location.

• Top of Dry Riser • Top of Main Pedestal Dry Riser • Top of Tank Access Ladder

4.4 The Ladders – Safety Stops (Three Required) are for allowing the

climber to stop at the end of each run. These stops are compatible with the TS Safety Rails.

• Top of Dry Riser • Top of Main Pedestal Dry Riser • Top of Tank Access Ladder

4.5 The Column Vertical Ladder has the required one Rest Seat installed at the first 50’-0” Up or approximately halfway point. This safety seat is pre- engineered to attach to vertical ladders.

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4.6 The 14’0 Diameter Roof Handrails c/w Top and Mid-rails have been installed. The roof Railing system is missing the lower Kick plates (One Required). The railing system required 5” x 3/16” kick plate material bent and fabricated to meet the requirement of OH&S. The contractor should confirm the diameter of the handrail prior to fabrication of the kickplates. The new kickplates installed by a Certified CWB Welder. The railing system must meet all current OH&S requirements.

4.7 The Upper Landing Kickplates (One Required) in the concrete shaft

does not have the required kickplates. We would recommend supplying 2 pcs - 5” x 3/16” by 24’0” and 1 pc – 5” x 3/16” by 8’0”. These can be manufactured out of aluminum and bolted and secured to the existing kickplate with aluminum or stainless steel bolts.

4.8 The lower Security Door & Upper Locking Door meets the

requirements all current requirements. There are no upgrades necessary at this time. The owner should install weatherproof padlocks on the roof. 4.9 The Roof Venting (One Required) is poor. The tower presently has small undersized roof vent. We would recommend putting a 24” or 30” square opening over one of the vacuum relief locations and installing a 16” x 16” Aluminum Frost Free Roof Vent . This vent has bird screening to prevent bird entering the tower. The tower is showing no signs of negative effect as a result of the poor air venting.

4.10 The tower has two (2) Vacuum Relief Locations on the roof. We have recommended closing off the second opening using a new access hatch and roof vent combination. We would then recommend removing the existing vacuum relief vent and installing a 24” or 30” Access hatch for future coating work. These vacuum relief locations must be accessible to allow the paint contractor to install beam rollers on the internal monorail.

4.11 The Overflow Pipe is secure and functioning as designed. The overflow pipe runs down the internal surfaces of the pedestal and exits out the bottom. There is sufficient screening on the overflow to protect it from any birds from entering the tower. The overflow pipe is functioning as designed.

4.12 The Roof Access Hatch is in good condition. The roof hatch is a 24”

diameter and is functioning as designed.

4.13 The Tower Grounding does exist and is functioning as designed. The owner has a minimum of two (2) copper ground to the base of the tank and running a ground cable out 15’0” from the base of the tower and buried 1’-0” below grade.

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5 Conclusion 5.1 The exterior coating is in poor condition. The exterior coating requires

immediate attention next year -2014. The exterior coating is showing heavy signs of Ultraviolet Degradation and as a result thin coating on the topcoat starting to break down the intermediate coat. Throughout the tower we can see the mid-coat showing through. We would recommend full overcoating of the water tower.

The exterior surfaces would be a strong candidate for overcoating.

Application of an overcoat system would increase the life expectancy of this existing coating by fifteen to twenty-five years. And based on the location of the tower we would be able to overcoat this project without the use of a containment system (or as required by the owner). This would provide a savings to the owner, if completed next year. If left for more than five (5) year we would anticipate having to remove the existing coating. Requiring a containment to protect the environment would cost approximately 350K plus disposal and sandblasting which would cost an additional 75K.

This water tower should be overcoated in the next year using a (three coat) current technology system. Application of this system would eliminate the enclosure system with would save the owner approx. $300K. The anticipated cost to overcoat the exterior surfaces would be: Overcoating Costs Estimates (1a) Exterior Surfaces (Outside)(Overcoat) $275,000 Internal Maintenance Coating Repairs $ 50,000 Dry Riser, Access Hatch, Other $ 25,000 Safety Upgrades $ 50,000

(2014 Estimate Dollars) $400,000 Consulting/NACE Inspection $ 50,000

$450,000 This cost would have a life expectancy of 15 to 25 years. Full Removal Cost Estimate (1a)

Exterior Surfaces (Outside)(Includes Pedestal) $100,000 Exterior Containment (SSPC-Guide 6 Class 3c) $300,000 Additional Consulting and Inspection $ 30,000

Add $430,000 This cost would have a life expectancy of 25 to 40 years.

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5.2 We would recommend the application of a four (4) coat Overcoat System on the full exterior surfaces. This surface would include: all exterior components, including all exterior surface include entry doors. The coating system would include Detergent Washing, 5,000 psi Pressure Washing (exterior only), Solvent Wipe (internal only), Spot Penetrating Sealer, Full (Epoxy) Stripe Coat, Full Epoxy Coat (one coat epoxy internal surfaces), (two coats) full urethane coat full uniformity. And then ensure full coverage of remaining coats according to SSPC-PA-2 and SSPC-PA-1 “Good Painting Practices”.

5.3 The interior lining of the tower is in good condition. The tower will need maintenance repairs on the internal lining at this time. There is less then 1 % active corrosion taking place on all surfaces. The owner can review the internal condition and complete minor maintenance coating repairs on the various locations on the internal lining. 5.4 Safety Requirements as specified.

• Two (2) Davit Base Plates c/w Engineering • Three (3) Safety Stops • Three (3) Engineered “D” Rings for Transfer Locations • Kick Plates on Upper Roof Handrail and Upper Landing catwalk. • One (1) 16” x 16” Aluminum Frost Free Vent • One (1) 30 or 36” New Alum. Access Hatch (vacuum vents)

5.5 The owner will be required to establish using a Third Party Inspection and Paint Testing Lab to verify if the existing paint contains heavy metals.

6 Recommendations 6.1 The towers exterior structural surfaces, ladders, dry riser will require a

new paint system over the next year (2014). We have included our Life Expectancy for either Overcoating or Full Removal System.

6.2 The coating is still tightly adhering and would make a good candidate for overcoating. The pressure washing phase of work is necessary to provide a method of determining overall consist testing for adhesion on the existing coating. We want to ensure the proper pressure washing is taking place to ensure all remaining coating is tightly adhering. We would anticipate further levels of paint being removed during the pressure washing phase of work when maintaining the 5000PSI c/w turbo nozzle c/w 3” to 6” standoff. All additional sanding and feathering will be part of the scope of work. We would recommend the three coat system on all external service

surfaces which would include topside of floor inside column, dry riser, roof hatches. The system would include full detergent washing, 5000 psi High

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Pressure Washer, spot primer with penetrating sealer, full coat of epoxy and full coat of high gloss urethane. This system would have a life expectancy of 15 - 25 years. The exterior could also be full removed at an additional cost but would last from 25-40 Years.

6.3 The internal lining system is in good condition. The internal lining will

function as designed. We would recommend internal repairs at the time, when the exterior surfaces are being repainted. Once repaired we would be able to put the internal lining back into service for the next Five (5) Years.

6.4 Proceed and make all the necessary safety upgrades and security

improvements to protect your potable water facility.

6.5 The services of a NACE Consultant and Certified Inspection firm should be engaged to prepare specifications and provide full time NACE Coating Inspection. To ensure the contractor complies with lead abatement issues, containment, surface preparation and coating applications.

7 References (1) Munger, C.G., Corrosion Prevention by Protective Coatings, 1984,

National Association of Corrosion Engineers, Houston, USA (2) Hare, C.H., Protective Coatings Fundamentals of Chemistry and

Composition, 1994, Technology Publishing Company, Pittsburgh, USA (3) Bradford, Samuel, A., Ph.D., P.Eng. Corrosion Control, 2001, University of

Alberta, Casti Publishing Inc., Edmonton, Canada

Thank you for allowing us to be of service to you.

Respectfully submitted, MISCO - Mulders Inspection Services Co. Ltd.

Keith Turney

Keith A. Turney, CET, CSO, President Water Tower Specialist Protective Coatings Consultant NACE Certified Coating Inspector # 3996 SSPC Certified Concrete Coating Inspector # 44704

Stratford (Foreman) Composite - Executive Summary Sheet

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ACTION LEGEND

Upgrades Necessary – Over the Next One (1) Year Recommended Repairs – Over the Next Three (3) Years

Separate Report Attached – if Applicable No Action Required – Till Next Five Year AWWA/NACE Inspection

OH&S – SAFETY & SECURITY ASSESSMENT PHOTO Exterior Surfaces Poor- Overcoat – 2012 1 to 18 Column Surfaces (Dry Riser & Access Tube)

Fair – Repair Landings 82, 83, 22

Internal Lining Good – Maintenance Repairs 28, 29, 30, 35 Roof Locks (Padlocks or other) Good 73 Lower Locks (Padlocks) Good 19 Perimeter Security Gate Not Required 8 Roof Davit Base Plate Missing 32 Catwalk Davit Base Plate Missing 98 TS Safety Rails Good 94, 92, 85 Safety Stops Missing 22, 73, 94 Transfer Stations – D Rings Missing 22, 73, 94 Aluminum Rest Seat – 50ft Good 91 Vertical Ladder Good 67 Roof Vent Frost Free Upgrade Required 32 Roof Antenna & Railing System N/A - Overflow & Screens Good - Manway 24” - OH& S – Floor Good 89 Access Ladder to Manway Good 71 14’ Dia. Railing System Missing Kickplates 77 Exterior Painters Rail Good 5 Harness Set & Slider Missing N/a Stretcher Upper Catwalk Missing N/a Confined Space Procedure Missing N/a Aviation Warning Lights c/w GFI N/A 79

Other

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Overcoating Valve Chamber Good N/a Lightening Ground Protection (2 or 4 Required)

Good 99

REPAIRS MADE DURING INSPECTION We would anticipate completing all these safety upgrades and coating upgrades next year (2014. We would look to complete the overcoating of the exterior and completion of the internal maintenance repairs at the same time. We would welcome the opportunity to quote on the consulting and inspection work for this project. Thank you for allowing MISCO – Mulders Inspection Services Co. Ltd. to be of service to you. Respectfully submitted, MISCO-Mulders Inspection Services Co. Ltd.

Keith Turney Keith A. Turney, CET, CSO Water Tower Specialist Protective Coatings Consultant NACE Certified Inspector # 3996 SSPC Certified Concrete Coating Inspector # 44704

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