Addendum 4 Attachment 2 Technical Memo.pdf.crdownload

South Meadows Structural Operating Plan

South Mea dows Structural Ooerating Plan slLl202s

Summary

The structural operating plan for the South Meadows facility involves a comprehensive assessment and inspection program for on-site structures to ensure their integrity. After an initial evaluation by Authority staff, it was determined that the structures on the Waste Processing ('WPF") side of the site were sound and do not require structural evaluation, with all structures constructed in the 1980's or later. Therefore, the comprehensive assessment focused on the Power Block ("PBF") side of the site, with some structures dating back to the 7920's and some newer structures showing signs of corrosion due to the nature of the PBF processes when it was operating.

The Authority engaged HDR, lnc. to conduct a thorough examination of the steel framework and masonry structures of the PBF to identify any signs of corrosion, cracks, or deterioration.

Of particular importance is an assessment of the boiler hangers, as the three waste-to-energy boilers are supported from the roof of the PBF. Non-destructive testing methods like ultrasound and magnetic particle testing may be employed for a detailed analysis following visual inspection if observations indicate such testing would provide value.

At the conclusion of the thorough examination, a baseline condition assessment and inventory of key structural elements will be developed and an inspection program will be implemented to routinely assess the condition of key structural elements vs. baseline conditions. Structural conditions deemed unsafe will be managed through various practices including: Barricading areas deemed unsafe to prevent access, prioritizing maintenance and/or demolition activities, rust removal, reinforcement of weakened sections, and repointing of masonry joints. Regular monitoring and periodic inspections would be scheduled to detect any new issues promptly, ensuring the continued stability and functionality of the facility.

As of early April,2025, HDR is working to incorporate its final observations into a technical memo, inspection form, and associated support documents. Each of these documents (with the exception of the photo log) is in draftform and attached hereto.

F)?

Technical Memo

Date: Wednesday, April 30, 2025

Project Mira Dissolution Authority (MDA) Structural Evaluation

To: Dave Bodendorf (MDA)

From: Jesse Jaeckel (HDR); Dallas Dissmore (HDR)

Subject Structural Evaluation Technical Memorandum

Proiect Understandinq

On July 19, 2022, MIRA ceased municipal solid waste combustion and associated electricity production at its Connecticut Solid Waste Systems Resource Recovery Facility ("CSWS RRF,, or the "Facility'). MIRA has since rebranded to the MIRA Dissolution Authority ("MDA"). Since its closure the Facility has been broom swept, but limited decommissioning activities have othenrvise occurred. Waste handling and processing equipment has not been operated, and areas of the buildings have continued to deteriorate. Roof leaks and sections of insulated, modular wall panels were observed to be missing from the Power Block Facility ("PBF'), allowing precipitation to enter the building and accelerate the degradation of the interior equipment and structures.

The MDA recently completed the South Meadows Redevelopment Considerations Study to inform stakeholders of the environmental needs and knowledge required for redevelopment of the site. MDA identified the importance of evaluating the current structural condition of the pBF, identifoing critical structural components of the facility, and devetoping a routine inspection program where the condition of the facility can be monitored against the baseline condition until which time the site is redeveloped or demolition activities occur.

To complete this evaluation MDA retained HDR Engineering, lnc. to visually observe and report on the structuralcondition of the following components:

o General PBF Boiler Buildingl

. Coal Unloading Crane, Transfer Structures and Conveyors

. Screen Houses 1,2, and 3

. RDF Overhead Conveyors and Transfer Building

. MCAPS Overhead Duct System

. Pebble Lime and Dolomitic Lime Silos

. Air Handling and Air Pollution control structures, including stack

. Staircase and Catwalk Structures

. Concrete pad over the former Track Hopper Room

1 Scope does not explicitly note this bullet however HDR understands they were to be included in the study

55 Capital Blvd, Suite 403, Rocky Hitt, CT 06067-3927

(860) 494-785055 capital Blvd, suite 403, Rocky Hiil, cr us 06067-3927(860) 494-7850 hdrinc.com

. Boiler hanger supports2

These areas are identified on the site plan documents attached in Exhibit A.

Summarv of Activities

HDR performed site visits September 24-25,2024i November 6-7,2024; and February 11th,2O2S for a total of five days on-site evaluating the above mentioned areas/equipment at the CSWS RRF. During these evaluations HDR recorded visual observations, spot checked the thickness of select support hangers and structural members, took photos of select observations, and measured cracks/gaps that were observed to be present in different locations throughout the PBF and other structures.

On March 27 2025, the HDR team returned to MIRA to obtain video and photos of the roofs and upperwalls of the PBF and stack by flying an unmanned aerialvehicle (i.e., "drone") outfitted with a camera and transmitting video to the drone pilot on ground. The purpose of this follow-up visit was to investigate the conditions of some of the facilities' roof that were unobservable during previous visits, due to their very tall height and/or inaccessibility.

The focus of these efforts was to identihT current hazards that existed in the locations identified in the scope of the evaluation, prescribe an immediate action to mitigate any concerns, and identify an appropriate reinspection frequency.

HDR developed a site inspection checklist documenting the most notable observations that were made. The checklist will also be used by a future inspector to verifi7 that the conditions identified by HDR are not worsening, and to add newly observed items.

HDR used a S-category rating system to rate the condition of the structures and equipment that were observed. The definitions for these rating classifications are shown below. lt is important to note that the intent of this rating system was to classiflT observed hazards that could cause harm to personnel working or traversing through an area. As such, not all observations are specific to a concern about the structural integrity of support structure or piece of equipment, for example.

Rather, most of the poorer rated observations relate to observations such as loose exterior building cladding, or missing/damaged handrails. The following are brief descriptions for each of these ratings:

Excellent: No observed concerns

Good: No observed concerns

Fair: No immediate hazard to personnelworking ortraversing through the area was observed.

Poor: Area should be barricaded off and hazard should be monitored for further deterioration.

Critical: Area should be barricaded off and the hazard should be monitored for further deterioration and consideration should be made to address the hazard.

HDR notes that in most instances where ahazardwas identified and was significant enough to

2 Scope does not explicitly note this bullet however HDR understands they were to be included in the study hdrinc.com 55 Capital Blvd, Suite 403, Rocky Hill, CT 06067-3927

(860) 494-785055 Capital Blvd, Suite 403, Rocky Hill, CT US 06067-3927(860) 494-7850 qualify for a Poor or Critical rating, the recommendation made was to barricade the area off to prevent access. Being that these facilities and equipment will ultimately be'demolished and removed, there is no reason to expend capital reserve money to perform repairs so long that the area can be avoided entirely. ln some cases a corrective action, or the recommendation to install a crack or movement monitor, was suggested as an additional measure for consideration.

Description of Areas Observed

General PBF Boiler Building

The boiler building houses RDF boiler 11,12 and 13. This 66' by.170'by 125'high metalframe structure incorporates the south wall of the original power plant, which is constructed of brick. The boiler building also shares a common wall with the original turbine hall on the west side and the original power plant on the north side. When the RDF boilers were instalted in 1g88, the height of the structure was increased. Metal wall panels were used to enclose the additional area on the south and west walls as well as the entire east wall. There are three banks of windows on the original south wall and six ventilation louvers above the window elevation on the building extension. There are also a number of ventilation louvers on the east and west walls. The building roof is constructed of metal decking, insulation and a rubber membrane. There are eight ventilation fans, six steam relief silencers, three skylights/access points and numerous vent pipes on the roof. There is also a small dust collector on the boiler building roof whibh previously served the coal silo. The RDF Feeder Bay is attached to the east side of the boiler building and has a slightly lower roof line. This building is approximately 25' by 170' by 114' high. The roof on this structure is also constructed of metal decking, insulation and a rubber membrane covered with crushed stone. This roof has two ventilators and six pickup points connected to the MCAPS system.

Coal Unloading Crane, Transfer Sfrucfures and Conveyors

The Coal Unloading Crane is constructed just offshore of the riverbank. The structure consists of a multi-story structuralsteeltower built atop a multi-levelconcrete platform supported on concrete piles extending down to the riverbed. At high tide, the Connecticut river submerges the lowest-level platform, depositing an approximately 3"-to-6" layer of sand on the platform floor when the water recedes. However, HDR observed little{o-no damage from the water's activity. The facility is generally in very good condition.

Screen Houses

The north screen house (Screen House 1) is located on the river side of the dike and serves as the cooling water intake for TG 6. This approximately 24' by 30' structure includes two circulating water pumps (one operating, one standby) and two traveling trash screens. The northwest screen house is approximately 30' high with the bottom at Elevation minus 11'-0". The top floor has brick walls while the rest of the building is poured concrete with a brick exterior on the portions of the concrete that are above grade. There is one wall fan on upper floor east side and a steel flsh return chute on the south side. The north screen house reportedly dates back to 1949.

The central screen house (Screen House 2) is located between Screen Houses 1 and 3 and formerly provided cooling water for an additional T/G that was removed from the site when the

55 Capital Blvd, Suite 403, Rocky Hill, CT 06067-3927

(860) 494-785055 Capital Blvd, Suite 403, Rocky Hitt, CT US 06067-3927(860) 494-7850 a facility was retrofitted to process RDF in 1988. As a result it has been unused for approaching 40 years. lt is also approximately 30'high with a bottom Elevation of minus 11'-0" where the circulating intake pipes used to pull water in from the river. The top floor has brick walls while the rest of the building is poured concrete with a brick exterior on the portions of the concrete that are above grade.

The south screen house (Screen House 3) is located downstream of the northwest screen house and serves as the intake for cooling water for TG 5 and service water for process needs. This approximately 47' by 22' structure includes two circulating water pumps (one operating, one standby), two service water pumps (one operating, one standby) and four traveling trash screens (two for circulating water and two for service water). The south screen house is approximately 30' high with the bottom at Elevation minus 11'-0'. The top floor has brick walls while the rest of the building is poured concrete with a brick exterior on the portions of the concrete that are above grade. The east side of the building has a fresh air supply system that serves each of the lower floor levels. There is a steel fish return chute on the south side. The south screen house reportedly dates back to 1937 and was modified in the 1988 time frame when the RDF boilers were installed.

The service water pumps were installed at that time.

RDF Overhead Conveyors and Transfer Building

The RDF Overhead Conveyors are used to transmit solid material from the Waste Processing Facility to the Power Block Facility for usage as part of the power generation process. These showed a small amount of rust on the exterior metal undersides, a few broken footings at ground level, and severe flooding within the connecting point at the Refuse Derived Storage facility.

However, the structural integrity of the conveyor appears intact.

The Transfer Building is a multi-story building connecting six conveyor tunnels between the Crane Unloading Building, the PBF, the Coal Pile, and the Refuse Derived Storage facility. This structure serves as a connecting hub for the conveyors, diverting material traveling to-and-from the Refuse- Derived Storage, the Coal Unloading Crane, the Coal Pile, and the Power Block Facility (pBF).

This building also showed littleto-no damage.

MCAPS Overhead Duct System

The Mid Connecticut Air Processing System (MCAPS) was installed in 2001 to collect and transport potentially odiferous air from the WPF to the boiler building for use as combustion air in the boilers. The aluminum ductwork appeared to be in good condition.

Pehble Lime and Dolomitic Lr-me Sr7os

These silos were used to store pebble lime and dolomitic lime which were reagents used to adjust the pH level of the ash product. The structural condition of these silos were difficult to determine by visual observation due to the coating of spilled lime and grit on the exterior.

Air Handling and Air Pollution Control Structures, tncluding Sfack

Each boiler has a dedicated APC train. The flue gas travels through the Spray Dryer Absorber (SDA) vessel, where a lime slurry is injected through a rotary atomizer to neutralize acid gases consisting of sulfur dioxide (SO2) and hydrogen chloride (HCl). After the SDA, the flue gas travels

55 Capiial Blvd, Suite 403, Rocky Hill, CT 06067-3927

(860) 494-785055 Capital Blvd, Suite 403, Rocky Hitt, CT US 06067-3927(860) 494-7850 through a reverse air fabric filter baghouse where particulate is captured in fabric filter bags. The cleaned flue gas exits the baghouse, being drawn through the system by an induced draft (lD) fan. The discharges of the three lD fans combine into a common duct and exhaust out through a common stack.

Stainnays and Catwalk Structures

The interior of the PBF includes a series of galvanized, perforated, anti-skid, metal grated flooring, walkways, and stainruells. These are generally in reasonably good condition; however, there are a few locations where the supports have weakened, and the flooring deflects significanfly under the weight of normal human foot traffic. These must be either taped off or fixed as soon as possible. Additionally, there are multiple concrete catwalks within the PBF. Most of these are still in reasonably safe condition; however, the railing on some of them has broken, so that persons walking along those catwalks are unprotected against slipping and plunging several stories to the floor below. These areas have been taped off; however, they still remain a serious hazard to building visitors.

Concrete Slab Over Former Track Hopper Room

The concrete slab over the Track Hopper Room was designed to support rail cars unloading coal. A sign is posted indicating a load limit for the concrete slab of 1,2001b gross vehicle weight, and concrete barricades have been placed around the pad to prevent vehicles from traveling over it. Based on HDR' s observations of the Trach Hopper Room below the pad, HDR recommends the barricades be maintained and the load limitation remain.

Boi I e rs H an g er Supports

The PBF houses three C-E ModelVU40 waterwallfurnace, spreader-stoker boilers with traveling grates each rated a|677 tons per day of design RDF. These are referred to as Boiler 1 1, Boiler 12 and Boiler 13. The rated steam capacity of each boiler when combusting RDF was 231,000 pounds per hour at a superheater outlet temperature of 825 degrees Fahrenheit (oF) and a pressure of 880 pounds per square inch gauge (PSIG). These boilers were designed to generate steam which was sent through two, 45 MW (50 MVA) steam turbine-generators (TG) referred to as TG 5 and TG 6.

The VU-40 boiler is supported by hangers from the top of the boiler. The hangers, which are comprised of approximately 45 rods (sizes vary from Ta" to 2" diameter), are spaced as required to support various components and weights of the unit. The hangers attach to steel girders at the top of the boiler building such that the boiler effectively "hangs" in place. The boilers are attached in this manner to allow them to expand and contract vertically when they are thermally cycled.

Boiler Hanqer Analvsis

HDR visually documented some of the observable hangers supports and also took spot readings of the rod diameters as described in more detail in the checklist and photo log. The entire boiler should be washed down to fully remove ash, dust, and grit that covers many of the nuts that hold the hanger rods in place to allow for better future visual observations.

HDR was able to visually observe and take spot readings of different hanger rods on all three

55 Capital Blvd, Suite 403. Rocky Hill, CT 06067-3927

(860) 494-785055 Capital Blvd, Suite 403, Rocky Hi[, CT US 06067-3927(S60) 494-7350 boilers. Although HDR was not able to obtain structural drawings of the boiler support system for this facility, HDR was able to obtain drawings for the same VU-40 boiler that was installed at the H-POWER facility located in Kapolei, Hi and for the purposes of this study has made the assumption that the boiler hanger system design is substantially similiar to that of the CSSW RRF.

Several drawings obtained from Drawing Set#28185 showed the hanger rod dimensions and provided sectional views of the boiler system which HDR was able to correlate with observations and measurements taken in the field. For the limited number of spot readings we were able to obtain on each of the boilers, the measurements appear to align with the design dimensions denoted in the H-POWER structural drawings, indicating there has not been iny significant material loss due to corrosion.

ln addition, it is important to note that the boiler structures weigh significanly less than the weight they were original designed to carry. This is due to the removal of the screen tubes, general wall thickness loss of the boiler waterwall panels, and most notably, the fact that the boilers are not holding water. Drawing 28185-1E0001 Rev 9 provides a table of water weights that shows a total water weight of 171,266 lbs (85.6 tons) when the boiler is filling to the typical operating water level, and 226,109|bs (1 13 tons) when entirely filled. HDR assumes that the weight of this water may be as much as 20% of the total weight of the boiler.

HDR's visual observations cannot rule out the possibility of stress corrosion cracking or other microscopic degradation to some of the boiler support hangers, and Non-Destructive Examination (NDE) testing could provide more comprehensive findings. lf the intent was to refurbish and operate these boiler for another 30 years it may be prudent to perform more comprehensive inspection on these hangers and even consider replacing them, due to the additional thermal cycling and dynamic loading they will be subjected to over the next operating lifespan. However;

considering these boilers will no longer be operated the hanger rods only need to withstand the static load of the empty boiler. HDR did not observe anything from its visual findings or spot field measurements that indicated cause for concern regarding the structural integrity of the boiler hanger support system.

Drone Findinqs

Video was recorded for the entire drone flight and used to obtain still footage of the team's observations as part of this report's documentation. Drone footage captured several additional items that have been added to the checklist, the most notable including:

' A large portion of the Ash Loadout Building roof that has caved in (Checklist ltem #79, Photo D.04)

' A section of roof on Baghouse 12 that has become unsecured and peeled back (Checklist ltem #81, Photo D.06)

' A large hole on screenhouse#2roof (checklist ltem #g5, photo D.10)

' Closeup views of the PBF building parapet wall and brick fagade on the Northwest and Northeast end of the PBF showing the separation of the brick fagade and listing of the parapet wall ((Checklist ltems #86-88, photo D.1 1-D.13).

General Findinqs

55 Capital Blvd, Suite 403, Rocky Hitt, CT 06067-3927

(860) 494-785055 capital Blvd, suite 403, Rocky Hiil, cr us 06067-3927(860) 494-7850

HDR identified a total of 59 line items for the inspection checklist. Out of the 89 items, 4 were rated'Excellent',27 were rated'Good',30were rated'Fair', 16 were rated'Poor', and 11 were rated 'Critical'.

The items identified as 'Critical' and HDR's recommended corrective actions for these items are shown in the following Table 1:

55 Capital Blvd, Suite 403, Rocky Hill, CT 06067-3927

(860) 494-785055 Capital Blvd, Suite 403, Rocky Hiil, CT US 06067-3927(860) 494-7850

Table 1: MIRA lnspection ltems ldentified as "Critical"

55 Capital Blvd, Suite 403, Rocky Hill, CT 06067-3927

(860) 494-785055 Capital Blvd, Suite 403. Rocky Hill, CT US 06067-3927(860) 494-7850

Ongoing lnspection Frequency

6 months

6 months or after severe windstorms of 70mph gusts or higher

6 months or after severe windstorms of 70mph gusts or higher

6 months or after severe windstorms of 70mph gusts or higher

Ongoing lnspection Requirements

Document current condition with photographs and confirm necessary areas are still appropriately barricaded from access.

Document current condition with photographs and compare to originally observed condition. lnspect wall from roof side to verify movement, brickijoint conditions, and review crack and movement monitors on a continuous basis.

Document current condition with photographs and compare to originally observed condition. Confirm necessary areas are still appropriately barricaded from access.

Document current condition with photographs and compare to originally observed condition. Confirm necessary areas are still appropriately barricaded from access.

lmmediate action

Barricade stairs to avoid any further access.

Barricade area at ground level to prevent anyone from standing in front of this parapet wall.

Consider adding crack and movement monitors to wall to monitor wall conditions. lf facade separation continues, consider adding bracing to backside of parapet wall to stabilize wall.

Barricade area and prevent access to areas underneath falling object hazards.

Recommend covering this opening to keep rain and snow out of the interior of the building.

lnspection Findings

This is a hazard to inspectors/personnel who may need to access the 2nd floor of this building

Brick fagade appears to be separating from building structure (circled in yellow) and parapet wall is leaning.

Metal paneling that has fallen onto the low roof level underneath.

Missing siding is exposing interior equipment and structural members to rain, snow and wind.

Location

Screenhouse

#2, NW

staircase

North end, east side PBF high roof

South end, west side

PBF high roof

South end, west side

Item/ Photo #

SH.6

PBF.O3

PBF.06

PBF.07

hdrinc,com

1-)?

Ongoing lnspection Frequency

6 months or after severe windstorms of 70mph gusts or higher

6 months

6 months

6 months

Ongoing Inspection Requirements

Document current condition with photographs and compare to originally observed condition. Confirm necessary areas are still appropriately barricaded from access.

Document current condition with photographs and compare to originally observed condition. Confirm area has been appropriated sealed from rain and snow.

Document current condition with photographs and compare to originally observed condition. Confirm necessary areas are still appropriately barricaded from access and/or hazards have been removed. Confirm building siding has been repaired to seal the building from rain/snow.

Document current condition with photographs and compare to originally observed condition. Confirm hazard has been removed.

lmmediate action

Barricade area and prevent access to areas underneath falling object hazards. Consider removing & replacing with water-resistant panels to eliminate potential for falling plywood & metal

Seal opening to prevent rain and snow from further corroding the structural components supportin g Boiler 11.

Barricade area and prevent access to areas underneath falling object hazards. Consider removing loose and fallen paneling and seal the building (see photo PBF.6 and PBF.7) from rain/wind.

Remove or repair light fixture.

lnspection Findings

Exterior wood paneling is bowing & may detach & fall onto low roof below, metal paneling has fallen due to fully rusted & deteriorated connections

Opening in ceiling, podsible where a roof ventilation fan or roof hatch used to be located.

Lagging and insulation is broken off and hanging.

Potentialfalling item hazard. Building siding is missing exposing interior to rain/snow.

A light fixture has partially fallen and hangs across the walkway at head height which poses an eye poke/head collision hazard.

Location

South end, west side

PBF lnterior, NE corner, (1Oth Floor)

PBF interior, Boiler room (9th Floor)

PBF interior, 8th floor

Item/ Photo #

PBF.08

PBF.13

PBF.31

PBF.32

55 Capital Blvd, Suite 403, Rocky Hill, CT 06067-3927

(860) 494-785055 Capital Blvd, Suite 403. Rocky Hill, CT US 06067-3927(860) 494-7850 o

Ongoing lnspection Frequency

6 months

6 months

6 months or after severe windstorms of 70mph gusts or higher

Ongoing lnspection Requirements

Document current condition with photographs and compare to originally observed condition. Confirm area is still appropriately barricaded unless repairs have been made.

Document current condition with photographs and compare to originally observed condition. Confirm area is still appropriately barricaded unless hazard has been removed.

Maintain barricades until demolition.

lmmediate action

Barricade area to avoid access.

Consider replacing guardrail.

Remove lagging and insulation.

Prevent access to area underneath until hazard is removed.

Barricade building. Scheduled for demolition as part of Solid Waste

Closure Plan.

lnspection Findings

Guardrails are missing and/or deteriorated which poses a fall safety hazard.

Economizer hopper lagging and insulation has broken off and hanging loose. Potential falling item hazard.

Section of ' has caved in roof

Location

PBF interior, 8th floor

PBF interior, 7th floor by elevator

Ash loadout building

Item/ Photo #

PBF.33

PBF.34

D.04

55 Capital Blvd, Suile 403, Rocky Hill, CT 06067-3927

(860) 494-785055 Capital Blvd, Suite 403, Rocky Hill, CT US 06067-3927(860) 494-7850

FN

MIRA HARTFORD BOILER FACILITY

MAINTENANCE INSPECTION PHOTO LOG

Maintenance lnspection Photo Log Rev. 1 - 04103125 l-)?

Coal Tower and Conveyors

Rev. 1 - 04103125

CoalTower and Convetrrr F)?

cu.1 t- L

I

I cu.2

CoalTower and Conveyors F)?

cu.3

-ar,.

'4 t cu.4 cu.5

Maintenance Inspection Photo Log Rev. 1 - 04103125 cv.1

Coal Tower and Conteyors F)?

Coal Tower and Gonveyors F)?

cv.1 (cont.)

cv.2

CoalTower and Conveyors l-)?

cv.2 (cont.)

cv.3 b

CoalTower and Gonveyors l-)?

cv.4

Rev. 0 - 10111124 F)?

Screenhouse

I

Screenhou"" F)?

sH1.1 sH1.2

Screenhou"" l.)?

sH1.2

(cont.)

tr

-* {rt, .iE '*rIf. + sH1.3

Screenhou"" F)?

sH1.4

Maintenance lnspection photo Log

Screenhou"" l-)?

sH2.5 sH2.6

Screenhout" F)?

sH2.6

(cont.) sH2.7 sH2.8

Screenhou"" F)?

sH2.9 a, sH2.10

Rev. 1 -04103125

Screenhou"" F)?

sH2.11 sH2.12

Screenhou"" l-)?

sH2-3.13 sH3.14

PBF Exterior

PBF Exteri"r l-)?

PBF.1 PBF.2

PBF.3 PBF.4

PBF Exteriot l-)?

PBF.5 PBF.6

PBF.7 PBF.8

PBF Exterirr F)?

PBF.9 PBF.1O

PBF.11 PBF.12

rF.

G.

''ts-.lj$':f l*o:.+ft.*'s..*

PBF Exteri"t F)?

sT.1 sT.2

Rev. 0 - 10111124 l-)?

PBF lnterior

PBF lnteriot F)?

PBF.13 PBF.14

PBF.15 PBF.15

PBF lnterior

PBF.T7 PBF.18

PBF.19 PBF. 20

-.1

PBF lnterior l-)?

PBF.2I PBF.22

PBF.23 PBF.24

PBF Interior l-)?

PBF.25 PBF.26

PBF.27 PBF.28

PBF lnteriot F)?

PBF.29 PBF.3O

PBF.31 PBF.32

PBF lnterio, F)?

PBF.33 PBF.34

PBF.35 PBF.35

PBF lnteriot l-)?

PBF.37 PBF.38

PBF.39 PBF.4O

Baghouse

Bashouse F)?

BH11.A BH11.B

BH11.C BH11.D

t

Baghouse l-)?

BH11.E BH11.F

BH11.G BH11.H

Bashouse F)?

BH11.r BH11.J

BH11.K BH11.L

Bashouse F)?

BH11.M BH11.N

BH11.O BH11.P

Bashouse l-)?

BH11.Q BH11.R

BH11.S BH11.T

Bashouse F)?

BH11.U BH11.V

BH11.W BH11.X

Baghouse F)?

BH11.Y BH11.Z

BH11.AA BH11.BB

Baghouse l-)?

BH12,A

BH12.B

BH12.C BH12.D

Baghouse l-)?

BH12.E BH12.F

BH12.G BH12.H

Bashouse F)?

BH12.l BH12.J

BH12.K BH12.r

Bashouse l-)?

BH12.M BH12.N

BH12.O BH12.P

Bashouse F)?

BH12.Q BH12.R

BH12.S BH12.T

Baghouse F)?

BH12.U BH12.V

BH12.W BH12.X

Baghouse |)?

BH12.Y BHt2.Z

BH12.AA BH12.BB

Bashouse F)?

BH13.A BH13.B

BH13.C BH13.D

Bashouse F)?

BH13.E BH13.F

BH13.G BH13.H

Bashouse F)?

BH13.t BH13.J

BH13.K BH13.t

Bashouse I-)?

BH13.M BH13.N

BH13.O

I'

BH13.P

Bashouse F)?

BH13.q BH13.R

BH13.S BH13.T

Bashouse F)?

BH13.U BH13.V

BH13.W

I

BH13.X

Bashouse F)?

BH13.Y BH13.Z

BH13.AA

I

BH13.BB

Drone Photos

Drone Photos F)?

D.01 (cont.)

D.02 (cont.)

D.01

D.O2

Drone Photos F)?

x"--*--*-!ss.* i i*rol.

D.04

D.05

D.03

D.05

'.J;

It t, I

.,6J;

r;/5 ' ' ttld$$\s':------- | t t .aG .

ti

Drone Photos F)?

c

D.07 (cont.)

D.09

D.O7

D.08

&*i I

-t

N..

Drone Photos F)?

D.10

D.11 (cont.)

D.09 (cont.)

D.11

,t I

Drone Photos l-)?

D.t2 (cont.)

D.14

D.t2

D.13

MIRA HARTFORD BOILER FACILITY

MAINTENANCE INSPECTION CH ECKLIST

MIRA Hadord Facility Structural lnspection Checklist cu.1 cu.2 cu.3 cu.4 cu.5 cv.1 cv.2 cv.3 cv.4

Ex@llent

Ex@llent

Good

Poor

Good

Fair cood

Nol Rated

1 y€ar

1 yeat

'I yssr

1 year

1 yaar

6 months

I ycEt

1 year

'l y.ar

1 year

FiEl floor and sc@nd f,oor ot @sl unlogding crana

Loeliz.d misling finl3h on sic€l with minor qqro!i0n Ex@llgnt Bari€d! a6cs3 to @dunloading cran€.

Do@ment curent @ndition with photographg and @mparg lo odginally ob3eryed @ndition. Check to s€e if rust eventualt ex@eds 50% gt surfa@ aEai il so, then begin measuring widttu ot f,anges, wbs, & bolts on struc,tural membeF

Document curenl condition with pholographs and compare to originally obserued @ndition. Check to see if rust eventualV exeeds 50% of surtace area; it so, then begin m6asuring widlhs offraoges, webs, & bolts on struclural members

Doqmgnt curenl condition with photogr9phr and comparo lo origlnally obscryed @ndilion, Chock to sce it rust ovEntually .x@cd9 50% of surta@ arca; it so, thon bqgin mcasudng widlhs ot flanges, rebs, & bolts on struclural mcmb€rs

Compare pholographic evidene lo delermine ifany changes in conditions from year to year

Documenl curent @ndition wilh photogr€ph3 end comparc to originally obs€Ngd @ndilion. MraluF lhicknesseg of llanges & rcbs wilh calipers; abo, @mpar€ photographic €videnco to so6 if rust cvanlually cxcccds 50% ot surta@ aGE

Comparc ph€lographic ovidone to 30. if rusl evcntualv ex@eds 50% ot surL€ srca: it so, thcn begin measuring widlhs of llangEs, wbs, & bolts on struclural mombers CompaE photographic evidence to see il rusi eventually exGeds 50% of surfa@ area; if so, th6n begin measuring widths ot f,anqes, rebs, & bolts on structural members CompaB pholographic avidcn@ lq sco il rust evcntually cx€eds 500/0 of 5urfa6 areai it30, th.n begin measuring widths of iang$, rebs, & bolts on slruclural m€mbcE

Documenl curent condition with photographs and confirm ne@ssary areas are still appropriately barricaded ftom a@ss.

Framing members at @al unloading crane, 2nd ioor and bcyond

Lo€lized missing finish on steel wilh minor corrosion Ex@llent None.

10 CV.s (no photo) Coal Conveyor Did not enter due to @ncerned @nditions ol conveyor and safely oncerns

Nore.

None.

None.

Glvgn that conv€yor 19 no longer to be used, no @necifuo action lr rcquircd. Monitor tho @ndition ot struclurd clcmcnls ovgr tim. and @nsidcr cslric{ing a@ss Given ihat conveyor is no longer lo be used, no @reclive action is required. lvlonitor the @ndition of struclural elemGnts over time and consider reskictrng a@ess Givsn thEt @nvoyor is no longcr to ba uscd, no @rrective aclion is rcqulrcd. Monilor thc @ndition ol slrucluEl rlcmlnl!

Baffi€de a6ess lo @nveyor to reslricl a@ss.

Framing mcmbors al @al unloading qano, 2nd lloor and bqyond

Loellzed misslng finish en sleal wilh minor cot6!bn

Eviden€ ot high uter levels; horever, no eviden@ of structur€l damsge

Cgroslon is iurta€-levsl only; hoFvar, plttlom3 hsvo lhinnor sAuduBl mombeE E through tho struclur

Large cracks and pieces broken ofr indi€te

PFserc ol@m3ion lndieies lhsl rcisture €n scep thrcugh & onlrap sdo ovaporsting

Vvhen wlking inside the mnveyoF, lhere appeared to be no evidene lhal corcsion penetraied to afieci structural integrity

Ne lodl buckllng

Ground level slab of @al unlogding cEn6 Platfgrms @nnccting tho main facility tq thc f Et levcl of thc @al-unloading q€ne. Far sast sidc oftecility Conveyor closest to ground levcl, oulside ot SE side of PBF

ConveyoB ltamming from tranrb. building

Conveyors stomming from transfer building

ConveyoF slrmming l?om trarulor buildlng

Barri€d€ aeess arcund this @nveyor untit ir is removcd ?-"-"-tTll :il1tl-"dilion wilh photograPhs and confirm neessary areas are slill apprcpriately barri@ded from access.

MIRA Hadord Facility St.uctu.al lhspeclion Checklist F)?

1t sH.1.1 sH.1.2

Sqccnho66 #1, ground noor end baslmrnt floor gEling

Ovcrall, gEling secms in decnt @ndition, Good B€ri€d. stalF lo svoid any fulher a@css.

Documcnt curunl @ndilion wilh photograph3 and compare lo originslly obscryod @ndilion to dclemine it @ndition has rcEancd,Chock itany bolb or @nn.ctignr havg bc@mo loose sinco previous vilit.

Documenl curent condition wilh pholographs and compare lo originally observed @ndilion lo obserye if corrosion has rcrsened, wiich could indicate reakened structural integrity.

Documenl cunont condiljon with pholographs and compar€ lo originalv obs€rucd @ndition lo dclrmine if dcterioration has prcgrcssod or stabilized

Compars phoiogEphic cvidene io see if (1) fagade cracks widon, (2) fa9ade begins lo bow outMrds, (3) wshout gros larger. & (4) foundalion shos differential seitlemenl

Do@m6nl curent @ndition with pholog€phs and compar€ lo originally obsedcd @ndition lo deteminc it €ndilion has rcrsgned (i.e., seillement @ntinues, cEcks continuc to widen, or maE noti@able failuros aE o@ring)

1 ycar

1 year

'1 year

'1 year

S66snhouse #1, steel framlng and ., overall. qratinq s6ems in decent condition.@nnoctbns undemcatn -ground foor grating sH.1.3 celling ofiop ffoor of 1sl lcEcnhousc

Euilding'3 lo€tlon neer breckish reler v6por m8y @nlrlbute to rolting & daiodoratiqn sH.1.4 entEn€

Gravel@shout may indi€le reakening supporl for brick fagad€; cEck width = approx. 1/2 inch

Good BarriFde slairs to avoid any futher access.

Good Bani€do slair8 lo avoid sny tulhGr a@css.

Fair Barricade slairs to avgid any tulhcr access.

Add beri€dos to aEa to pEvcnl poFonncl trom a@ssing aree in €se ol partial building collspse

Fair15 sH.2.5 sH.2.6 sH.2.7 sH.2.8 sH.2.9 sH.2.10 sH.2.11 sH.2.12 sH.3.13 sH.3.14

Scrosnhourc #2, SW fagadc stak€se

Scrbenheuse #2. NW fafads

C6cks in brick iagada ol sdaenhou3c #2 = apprcxlmatGly 1/2 inch width, poirntielly widcning

This is a hazard lo inspectors/personnel wilo may need to ac@ss the 2nd floor ofthis building

Conditions indielc ongoing shuctuEl d€mage to 2nd floor ftaming systsm 6nd lo thc lnl€grity ot lhe masonry wll systcm.

Criti€l Barri€de stairc to avoid any futher access.

Bad€d6 aceSs lo 3croenhoule.

None.

Baridd€ ascss to screcnhouse, Bard€de a@ss to screenhouso.

Barriede a@ss to scrgcnhousg.

Barri€ds a@ss lo screcnhouse. Consider installing creck monitors to monitor movement of cEck betwon Mll and foundation

Bari€do arsa lo avold a@sglo rcodan slruclurc, Bari€de MlkMy io avoid any fulher ac@ss.

Document currcnt condition with photographs and confirm ne@ssary areas are still appropdately barricaded ftom a@ss.

Documcnl qrgnt sondilion wilh phoiographs and compare lo origlnrlly obseryed @ndilion lo deleminc if @ndltion hag rcrsened, Documenl curent condilion wilh pholographs and compare lo originally obseryed @ndition to monitor the @ndition of ihe pipe hanger and @nneclion over lime. Contirm ne@ssary aEas are still appropriately barri€ded from a@ess.

FutuG inspcclions lo measurq steol @rcsion and material loss on ste6l

FutuE inspeclions to measure .ebar & crack widths up close, & plol prcgEss over time

Monitor thc @ndition ol cxposcd Gbar ov6r lime by lsing calipcr to m.asur6 extonl ot rusling

Moniior exlenl of sagging foundation by measuring the crack

Documonl curcnt condilion with photographs and contirm nc@srary graas arc slill apprcprlately barledcd fmm a@ss.

Documgnt cutrent condition with pholographs and @nfirm neessary areas are slill approprialely barricaded fiom access.

1 year

6 months

'I year

'I year

'l yeEr

I year

1 yaar

1 year

1 yger

'1 year

Screenhouse #2 SE fae ot building

Chul6 and Chule supporls - appear in good condition, though the upper attachment point for the €ble could nol be closely obseryed.

Over limc, potcntiel tor pipc @llapse cttcr multipl6 3ovcE wind storms

Rebar & foundation vulne.able lo damage frcm Ml6r infillaalion inlo cracks

RcinfoEmcni is vulnorablc to @rosion it nol @vsred with @ncctr lndi€tive of mter damage due to river ovemow mshouv settlement beneath structuE, crack width = '1 inch

Poor

Good

Fair

Fair

Good

Poor

Good

Poor

Scpcnhouec *2 SE fe@ of building

Foundalion of screenhouse #2

Sdqnhousc F2 cxicNion found€lion screenhouse #2 ln botrccn -^ . ,,^ wood and bolts in dalsrioEtod siat tcEcnhousc 7 and *3 door enkan@

Due to signifi€nt @ncrele spalling & delsrioration, strucluEl inlegrity of the Mlkmy may be @mpromised

A-2

MIRA Hartto.d Facility Structqhl lnspection Checklist

25 PBF.O1

26 PBF.02

27 PBF.O3

Eln i& ot PBF, catmlk lo $E!n hou!c

East side ol PBF, by metals maleriEls slorege

Norlh&d casl 8lda ol PBF, hleh rcot

StMtuEl mmbcrg signlfi€ntt drl.doEtod duc lo rusl

Some mgvcmcnt has o@uring within ihe brick which is eusing lhc scparatlon (contribution lrcm walher eventtmainlcnan@ ofjoints and/or lack ot joinls between structur6s)

Bdck t89€do appcar6 to bc acpsrating hom bullding slructuE (cidcd ln ydlow) end

P.npcl mll ir lcanlng.

Poor Berrledc aGe aEund €tmlk lo avoid a@s!, Good Nore.

Criti€l

Doumnt cumnl @ndilion trilh and @nffm nG@ssry aroas arc rtill

Do@mcnt curent condition with photographs and @mpare lo originally obscryed @ndition. Monitor lhc sizc ot cr6ck over lim., Dodmnl emnl @ndition wilh pholog€phs and @mpar6 to originally ob$md @ndition. lrupocl mll trom rcot sido to varlly mvcmnt, bricldjoinl @nditloN, and Evlcw crock Nnd mwmcnl mniloF gn a @nlinqw bgsis.

Bard€dc am .l grcurd lrrcl to awld fiEiing bdcl or @llap$ ol paEprt mll on p!troro|. Consldor addlng mct end mowmni moniioB b mll !o monftor mll @ndlllom. It fHdr lcpaEdon @nlinuca, @naldcr adding bHlng to bscklldc of pffipcl mlllo slabillzc ull.

Bari€do area and prevenl a@css to a.6as undemeath talling objccl haards.

Bad€da eEe and pEvanl a@8s to aEas undcmsath falling objcct haards.

Bari€dc area and prevenl a@css to arEas underneath falling object hgzards.

1 ye6r

1 year windsloms ot 70mph gurt3 or highcr chipp€d roof, posesPBF.O4

PBF.O5

PBF.O6

PBF.O7

PBF.O8

PBF.O9

PBF.1O

PBF.1I

PBF.12

sT.1 sT.2

Fair

Falr

Crili€l

Crruel

Crili@l

Frh

F.i.

Good

Fair

Good

Good

Loosc piees ot cgncrcle lagade West side ot PBF, lowr aMy, alEady fallcn onto ihe low rcof falling objcct herd to pcFonncl

Do@ment cur€nt condilion wilh photogEphs and @mpare to originally obseryed @ndilion. Confrm ne@ssary areas are still apprcpriaiev bari€ded from a€css, Documnt curont @ndilion with photog€ph5 and @mpeF to originalt ob$ilad onditlon. Conim nc€ssary sEse ac Etill appoprietcty bani€dsd lrom a$cs!, Dodm6nt curent condilion wilh phologEphs and @mpare to originally obseryed @ndition. Confim ne€ssary areas 6re still approprialoly bsrieded frcm ac@ss.

6 manths windsloms of 70mph gusl8 or higher windstorms of 70mph gusts or higher

1 ycar

1 yEar

I ya.r

1 ycar south !H. of pBF. hloh coNcyor alllqhrcnt polnt l! !rvaEly :-;- -'-- - -' ''"'.' ruslcd. wlth Dic€s rnd 6hcab otrutal@l hanolng trom lt.

South end, wsi sidc ot Motal psneling lhat has fallen onto the low PBF, high roof

-, Milsino sidlng ls qxposing intcrior cqulpmsnl50m aho- mst 3t4 0t i i6i;;iil;;i'-

-- -' trddllrustuEl mambcm lo rain, snow snd

Extcrior wod paneling is bowing & may Soulh end, rcst side of detach E fall onto low rcof below metal PBF, high mof pancling has fallcn due to tully rusted & dclerioreled @nneclions PBF arirrior, 7ti f@r Somc of lhr ttructJral mmbotr havr sxlarior siraitxray, nonh crpadcnod @malon duc to l8ct of and, rc8t sidc prclldlvc @tlng PBF cxtorior, 7lh ioor Signifi€nt flaking ot stael. Areas where exterior siaimy, norlh fisking has oGurrcd m6asured to a lhickncss end, rcsi sidc ol 4116" ryf 3q:J 1!:11 Lbcem Eb rhickrc$ mmurud rr s/i6" incntror lEtlwY. mm ..

;;;.';ilil" -"' irc othcrloqliom on ltalrtowr Ash @nvoyor struqtuEl stecl appcars

Rrsmmcnd of lha lntcrlor ot lhc

Do@ment cumnt @ndition with photogEpfu and @mpaE to 6 monlhs or aicr scvcG qriginally obsoilcd @ndition. Confm nqassery aFas aro glill windstoms ot Tomph gusis spprcpdetrv bsri€dsd trom a@$. or hlghcr

Dodmnl sffioni @ndition wiih and ompaac io loss of structuEl mmbc[, Documcnl cumnl condition with photographs and @mpare to originally obserycd ondition. Track mcial loss of siructural membeF.

Do@mnt cmnt @ndillon wilh photogEphs end @mpaF to originally ob$ilrd @ndition. TEck mclal 16r ol slruc1ur.l mmbrB.

Dq@mant cun€nt condilion with photogrEphs and @mpare tg originally obs.ilod @ndition. Confim ne@sgary argss aro still apppprialev bari€ded fiem access.

Determine based on photographic evidence obtained du.ing drone inspeclion.

Barri€dr area and prevenl a@ss lo aEas undemeath fallinQ ^ obiec,i hazards. ConsiOer rcmoving a reptaci"s ;h ;l€r-- - ?:::T:11:iT.1t

*"dilion wilh photographs and @mpaF to 6 monlhs or aller seveG fi:i:,i", o";" t.;;n"rc e"t""ii"r #iirrii; prv*"d & :;lffiTlij;"#ffi::,Hl:il:g

**"sary areas are stiil windstoms or z0mph susts

Nom.

None.

Norc.

PBF extsrior, ground lcvcl looking up at ash @nvcyor

Stacldchimney - Exleilor

Stacuohimney -lnterior floor & walls bc lested bcforg pgrsonn€l is allowd to mlk on it.

Exterior of stack appears to be in good condition.

The interior and floor of lhe siack is covered in dirt and grime and difficult to fully inspecl

Bari€dc aroa and pEvcnl a@css to areas undcmrsth falling objsct hgzards.

None.

Barri€de a@ss to stack inlerior, Consider cleanino rnlerior of stack (mil and floo0 ro be able to further insJ""r *"u,fi""". ?:t"iTl!: ll:"d - PhotograPhic evidence obtained during use drone to inspecl upper levels of stack. drone lnspecton

A-3

MIRA Hartford Facility Structoral lnspection Checllist

PBF,13

PBF.14

Criti€l

Poor pBFrnGriq,NE@mc,,;'j"",iijli"lT:':l%$;:'3;*"J","T"

PBF lnlerior, NE comer, Broken structural membor presents hazard (10th Flood to persons Mlking on this catElk.

Photo shos thc m6in lt€el girderthel luppon3 thc Font end ot tho boiler. 4 hangcr rcd3 8tl8qh to thb girder. Thsy havo sonc 8urfacc rust bul apperr to be in good condilion-

Sealoponing to prcvlnt 6ln and snowfrom furth.r@.rcding lhc slructuEl componentg suppoding Boile|I 1.

Remove slruclural member or barri€dc area from access.

Considor wshing all supporl 3lrucjlumls lo providc betler vigual obseryalion.

Consider Mshing all supporl slruclurals lo provide better visual obseryation.

Considcr ffishing allsupporl slructuEls lo provido b.tlor visual gbscryElion.

Considermshing all support structurals io provide belter visual observation.

Considcr wlhing all !upporl rt ucturab to prcvide bettsr visual obscryation, Documenl curr.nt condilion with photogEphs and compaE to originally obseNed qondilion. Confim Erea has bcon apprcpriglrd 8calcd from rain and 9now.

Confirm structural rember has been removed or that aEa has been barricaded frcm access.

Documrnt cu@nt @ndilion with phologEphs and comparc to originally obscryod @ndition. Reinepecl afier boilor hls been lhorcughly mJhed. Visualt obesNs 6xposod boiler hanger supporG for 8ign! of signs ot dsfomstion or Gxsssivo corosion and pcrform lhickness checks to documcnl any matsrial loss, Document currsnt condition with phologEphs and compare to originally obseryed condilion. Reinspecl after boilor has been thoroughly wshed. Visualv obsetre exposed boiler hanger supports for signs ofsigns of defomalion or excessive corosion and pedom lhickness checks to docum.nl any malerial losE.

Document qurEnt condition with photographs and comparB to originally obseryed @ndilion. Visually oblerye exposed boilor hanger SupporlJ for signs of signs ot deformlion or exccasivo @mEion and pertom thickness chccks to documonl any material lo88.

Documenl currenl condition wilh photogtaphs and compare to originalt obseryed condilion, Visually obserye exposed boiler hanger supporls for signs of signs of deformalion or excessive corosion and pertorm lhickness checks to document any material loss.

Documenl curenl condition with phologEphs and compare to originally observed condition. ViBurlt obseryc cxposcd boilor hanger supporls for signs ofsigns of doformation qr cx@ssive corcslon and pertom thicknrsg checkg lo doament any malcrial loss.

mat.ial loss.

Docwent current @ndition wiih photographs and compare to originally obseru6d condition.

Documnt curunl @ndilion wilh phologEphs and compaE lo originally obgoNod @ndition.

6 mnth3

1 year

41 PBF.l 5

42 PBF-16

43 PBF.17

44 PBF.,I8

45 PBF.I9

PBF.20

PBF.2.I

PBF.22

PBF,23

PBF lnlcrior, Hlngqr supports on tronl halt ot boilor, boilcr fll (St\ ioor)

PBF lnlerio., boilcr #1 1

(glh floor)

Close up photo of gne of the hanger rod atiachments shoM in PBF.15. Some minor surface rusl Ehom but appear to be in good condition.

Good

Good

Fair

Fait

Frir

1 ycar

1 yea( t year

1 yeat

I yoar

1 yeat

I ycar

I year

1 year

Fair46

PBF lnterior, Hanger luppodg on hont halt ol Visual oblcryalions ldontitied rurtaco dsl on boiler, boilcr S11 (gth thr henger Eds in lhis locEtion.

ffoor)

Spot measurercnls taken on accessible hanger rods. Pholo shos rod thickness

PBF lnterior, Boiler *1 1 approx. -1 7/16' diameler on northem side (glh Flooo ot Boiler #1 3, analogous lo 1.5" dia. .ods on

Section 4-4 of samplc Boiler technical drawings Spot moasuromnts takcn on E@ssible hangcr rods. Photo lhow rod thickncls

PBF lnterior, Boilcr #1 1 epprox.'1 7/16' dismetcr on norlhlm sidc (gth Floor) of 80116r#13, analogous io 1,5" dia, rods on

Seqlion 4-4 of somple Boil6r tcchnical drawing!

The majority ofthe sudace rusting obsoryed appeared lo be on tho norlh side of Boiler pBF lnterior. 8oiler #1 1 #13 ne6' the opening in the root in lhe NE i$h ;i;;;i ' -- - @rne.. This photos shos the rusl on the hanger rod on the left compared lo lhe one ofthe righl that is better shiBlded inside thc boiler penthouse.

Document curenl condition with photographs and compare to consider Mshing al supporr structures to provide better visuat :19'l-"]! 111"1:9 *ndilion visuallv obseile etposed boiler obseNalton.

- --- hanger supporls for signs of signs of doformation or excessive cotrosion and perform lhickness checks to documenl any matcrial loss.

Document curcnt condition with phalagEphs and cgmpErc lo considerwshingaltsupportstruqlurstoprovtdobcttorvtsuat :lgi-"]!.:1t-":".9*"dition'vi8ualvobscNcexposcdboilffgbgcruatDn.

- --- hanger 8uppon6 for signs of signo ol dcfomalion or ox@6sivc

@rcsion and p.rtom thickness chcck6 lo documont any

PBF lntrrior, Hang.t lupportr for steam drum, boilsrf l1 (gth floo0

PBF lnt€rior, Hanger supports for steam drum, boiler#12 (glh floor) PBF lnlcdor, Boilor Pcnthouic. boilcr#12 (gth f,ooo

Nut! et thq lop ot thc hsngar rodr thal supporl th. sterm drum 8pp.ar to bc suf,icbntly iniaqt ihough prescncc otrsh/diri mke il diffcull to tult obscrva.

Nuts al the top of lhe hangcr rods thal support the sleam drum appear to be sufiicionlv inlact with minimal surlaa rusl.

lnlsrior of bollcr psnlhou36 and boilar ln

Good

Good Nona.

Good Non9.

MIRA Ha.tto.d Facility Structural lhspection Ch€cklist

PBF.24

PBF.25

PBF.26

PBF.27

PBF.28

PBF.29

PBF.3O

PBF,31

PBF.32

PBF.33

PBF.34

PBF.35

P8F.36

PBF.37

PBF lnterior, Hanger ro&. boiler #12 (glh floor)

PBF lntarior, Hangor rods, boiler *12 (gih fioo0 PBF lnlerior, Hanger rods, boiler#12 (gth floor) PBF lnterior, Hengcr md!, boilor#13 (gih f,oor) PBF lnierior, Hanoer rods, boiler*13 (glh floor)

PBF lnlarior, glh f,oot SE end ol building

Spol measurerenls taken on accessible hang.r rods. Photo show rod lhickness apprcx. -1 7/16'diameie. on northem side of Boiler#13, analogous to 1.5" dia. rcds on Seclion 4-4 of sample Boiler technical drawings Phola shom h€ngar rd Etlachmenl points on top sldc ofstlel gird.rs. Nuts appcsrlo bc in good condition, Photo shos hanger rod attachment points on top side of sleel girders. Nuts appear to be in good condition.

2" di€relcr U-rcds supporting lho supcrhcatcr piping in good visual condition

2" diamelor U-rcds supporling lhe suporheaier piping in good visual condilion

D!flection ot grEling ws masurcd over 1 inch

Fair

Good

Good cood

Good

Poor

Poor

Criticrl

Crilical

Critical

Critical

Fair

Fdit

Feir

Document curenl condition wilh photographs and compa.e to consider Mshing ail support structures to provide b€tter visuat :19'l-".l! :1"1".1 *ndition' visuallv obserue exposed boiler obseryalion.

"---' hanger supports for signs of signs of deformation or excessive corosion and peform thickness chocks to documenl any halerial loss-

1 yeat

I year

1 yeat

1 year

1 yeat

1 yegr

1 yeat

6 mnlhs

6 months

6 mnlhg

6 mnths

1 y6ar

1 year

1 year

Nonc.

None.

Nong.

Barricad. ar6a lo rvoid acess, Consldsr Gplacing guardrail.

Remove lagging and insulalion. Prevenl access to area

None.

None.

Drain wler frcm rcom br furthlr lnvcatigation lo vlrity slrucluF is tgund.

Documlni curGnt condilion wilh phologrsphs 6nd compaE to originalt obseryod condition.

Doilmenl current condilion with photographs and compare to originally obserued condition.

Doament curonl @ndilion with photographs and compaG to

Doament…