CLHS Facility Assessment

CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS

FACILITY CONDITIONS BUILDING ENVELOPE IMPROVEMENTS Roof Replacement on 1998 Addition Serving the Science and Media Center Wing Roof Replacement on 1986 Pool Addition Roof Replacement on 1998 Addition Serving the Cafeteria, Dance Studio, and Aux. Locker Rooms The roofs over the 1998 additions (main office, media center, science wing, cafeteria, and auxiliary locker rooms) and the 1986 pool addition (have all reached the end of their useful life and are showing signs of aging such as bridging / stretching at roof perimeters and multiple previous repairs. The roofs should be replaced in the next 1 to 3 years. (areas C, D, F, Y, Z, 5, 6, 7 and 8) Roofing system replacement will improve energy performance by increasing system insulation values, reduce leaks, and will reduce operating and maintenance expenses.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS BUILDING ENVELOPE IMPROVEMENTS HS-BE-1 Roof Replacement on 1998 Addition Serving the Science and Media Center Wing HS-BE-2 Roof Replacement on 1986 Pool Addition HS-BE-3 Roof Replacement on 1998 Addition Serving the Cafeteria, Dance Studio, and Aux. Locker Rooms • • • • • •

Removal of old roof systems & wet insulation / deteriorated wood blocking.

Polyisocyanurate insulation layers. R-30 with a minimum positive slope of 1/8" per foot to ensure proper drainage.

Recovery insulation board to accept new roof system & provide a stop gap against thermal bridging from insulation fasteners.

Multiply modified built-up roof system with gravel surfacing. Provides a "severe hail" rating.

Pre-finished sheet metal copings & counterflashing at all perimeters and projections to protect against damage and UV degradation.

HS-BE-1, 2, and 3 Benefits • Extend life of building • Reduce energy costs • Reduce leaks • Reduce operating and maintenance expenses

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS

BUILDING ENVELOPE IMPROVEMENTS Install through-Wall Flashing and Rope Weeps at Steel Lintels of the Original Building. Repair of Brick Cladding Including Tuckpointing and Replacement of Damaged Brick Chisago Lakes High School is constructed with a brick veneer, precast concrete panel, and metal panel façade. The building has aluminum framed windows.

Cracked mortar joints between the brick units were typically observed around the steel lintels, building corners, and windows.

Through-wall flashing was present at some, but not all, windows and doors.

Weep ropes were deteriorated in many of the areas where flashing was present.

A few locations of cracked, spalled, or broken bricks were noted. Efflorescence is present at many locations.

Some maintenance work is needed to improve the water penetration resistance of the brick, and new through-wall flashing may be needed in some areas to prevent water entry into the structure and prevent deterioration of steel lintels and other wall components.

High priority repairs include installing through-wall flashing and rope weeps at steel lintels of the original building. General maintenance of brick cladding, including tuckpointing and replacement of damaged brick, is currently needed. The above repairs should be conducted in the next 0-3 years.

Brick Cladding Cracking

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS BUILDING ENVELOPE IMPROVEMENTS HS-BE-4 Install through-Wall Flashing and Rope Weeps at Steel Lintels of the Original Building. Repair of Brick Cladding Including Tuckpointing and Replacement of Damaged Brick • Install through-wall flashing and rope weeps (600 LF) • Tuckpoint and replacement of brick (2500 SF) •• Repair damaged brick (400 bricks) HS-BE-4 Benefits • Extend life of building • Reduce leaks • Reduce operating and maintenance expenses

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS

BUILDING ENVELOPE IMPROVEMENTS Precast Panels Showing Signs of Deterioration, Cracks, and/or Delamination Should be Repaired using Concrete Patch Materials. A Clear Water Repellent Should be Applied to all of the Exposed Precast Panels to Reduce Future Moisture Absorption.

Precast panels around the 1998 addition are showing signs of taking on moisture which is visible at the window opening locations as well as at areas in the west section of the addition. Rust staining exiting at cracks and efflorescence are prevalent at many locations at the west addition.

Deteriorated, cracked, and/or delaminated precast should be repaired using concrete patch materials. Apply a clear water repellent to the exposed precast panels to reduce future moisture absorption. Precast panels repairs should be conducted in the next 0-3 years.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS

BUILDING ENVELOPE IMPROVEMENTS HS-BE-5 Precast Panels Showing Signs of Deterioration, Cracks, and/or Delamination Should be Repaired using Concrete Patch Materials. A Clear Water Repellent Should be Applied to all of the Exposed Precast Panels to Reduce Future Moisture Absorption.

• Removal of old roof systems & wet insulation / deteriorated wood blocking.

• Polyisocyanurate insulation layers. R-30 with a minimum positive slope of 1/8" per foot to ensure proper drainage.

• Recovery insulation board to accept new roof system & provide a stop gap against thermal bridging from insulation fasteners.

• Multiply modified built-up roof system with gravel surfacing. Provides a "severe hail" rating.

• Pre-finished sheet metal copings & counterflashings at all perimeters and projections to protect against damage and UV • degradation.

HS-BE-5 Benefits • Reduces staining • Prevents damage to structure • Reduces water absorption

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS

BUILDING ENVELOPE IMPROVEMENTS Clean Exposed Steel Lintels and Paint to Minimize Corrosion. Spray the Exterior at Downspouts to Remove Staining. Replace six (6) Exterior Doors and One (1) Garage Door at Loading Dock. Repair the Metal Panel that is Bowing on the PAC Addition.

Lintels above window openings are corroding and forming pack rust, which applies stress on the brick veneer and causes misalignment of the brick units.

This condition warrants repair to prevent further damage to embedded steel and brick cladding, and to prevent water entry into and through the exterior walls. Paint peeling from the bottom exposed lintel is likely due to rust formation.

The exposed steel should be cleaned and painted to minimize future corrosion/deterioration.

Water staining is present at downspout nozzles. Localized brick staining is occurring at water runoff locations. The cast stone does not have a large enough extension to prevent runoff from the sills to cascade down the brick wall. Clean surface of bricks at downspouts by means of power washing.

The hollow metal swing doors are corroded at the bottom of the door frames.

The doors and center mullion are showing signs of wear.

We recommend replacing the indicated exterior doors, including the hardware and locks.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS BUILDING ENVELOPE IMPROVEMENTS HS-BE-6 Clean exposed steel lintels and paint to minimize corrosion. Spray the exterior at downspouts to remove staining.

Replace six (6) exterior doors and one (1) garage door at loading dock. Repair the metal panel that is bowing on the PAC • Addition.

Install through-wall flashing Clean and paint steel lintels Sealant replacement at doors, windows, and control joints HS-BE-6 Benefits • Extend life of building • Reduce leaks • Reduce operating and maintenance expenses • • •

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS

BUILDING ENVELOPE IMPROVEMENTS Replace the leaking windows and doors on the 1998 addition that includes the science wing and media center. This includes replacing 22 windows, and vestibules 50 and 33. This includes new flashing membranes around the entire perimeter of window opening and new window with sill receptors.

The windows located within the 1998 additions to the building are all store front window systems built with an aluminum frame and double pane glass.

Entry vestibules #50 and #33 are part of this system and have significant water leakage. These systems appear to be the original installation, and no major work appears to have been done to these windows over the years.

Investigation of the windows shows multiple issues occurring with the current system is performing. Noted issues are water intrusion and gasket shrinkage.

Further investigation noted that the windows were missing a sill receiver which is meant to take on water for the system and expel the water to the exterior.

The existing windows appear to have met the end of their useful life, and it is recommended to replace the windows in the next 0 to 3 years.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS BUILDING ENVELOPE IMPROVEMENTS HS-BE-7 Replace the leaking windows and doors on the 1998 addition that includes the science wing and media center.

This includes replacing 22 windows, and vestibules 50 and 33. This includes new flashing membranes around the entire perimeter of window opening and new window with sill receptors.

• Demo 22 windows out of existing openings.

• Demo vestibules 33 and 50 • Clean all sealant from substrates.

• Install spray foam in all cavities where windows span from structural wall element to precast panels.

• Install flashing membrane around entire perimeter of rough opening.

• Install new windows with sill receptor. Spray foam and sealant to be installed between window frame and substrate.

HS-BE-7 Benefits • Eliminate water intrusion.

• Extend the life of the building • Improve indoor environment

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS BUILDING ENVELOPE IMPROVEMENTS Replace Sealant at Doors, Windows, and Control Joints Sealant appeared generally in poor condition at window openings in brick masonry and precast cladding. Weathering, splitting, debonding, and cracking of sealant was observed throughout the façade. At previously repaired areas, new sealant at window frame edges and corners was smeared over old sealant and is failing. Debonding of sealant at window and door heads was noted at numerous locations.

Sealant is missing or has fallen out at some utility penetrations in the facade Exterior sealants deteriorate as a result of exposure to UV light, moisture, and temperature cycles. Sealants typically have a lifespan of 8-12 years depending on material, material quality, and application/configuration. Based on observed conditions, it appears that the sealants on the building have reached or exceeded their useful life.

Sealants are an important component of the exterior building envelope and in many cases are the first line of defense in preventing water entry into and through exterior walls.

Deteriorated sealants greatly increase the potential for water entry.

Replace all window and door perimeter, control joint, and penetration sealant at the building façade, as well as any miscellaneous sealants present. These repairs should be completed in the next 0-3 years.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS BUILDING ENVELOPE IMPROVEMENTS HS-BE-8 Replace Sealant at Doors, Windows, and Control Joints •

Replace sealant (approximately 16,000 LF)

HS-BE-8 Benefits • Extend life of building • Reduces water infiltration • Reduce operating and maintenance expenses

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS CONTROLS SYSTEM IMPROVEMENTS Upgrade Building Controls and Convert Remaining Pneumatic to Direct Digital Controls (DDC) The Chisago Lakes High School controls system is a combination of pneumatic controls and direct digital controls (DDC). Pneumatic control systems are less energy efficient and more difficult to maintain than modern DDC Systems. The controls system could use the following upgrades to bring the buildings controls system to the same standard as the rest of the District.

- Existing field mounted panels and wiring/conduit to remain - Replacement of field devices o Temperature sensors o Static pressure transducers o Humidity sensors o Differential pressure transducers - Safeties and limits to remain unless faulty in the field during checkout - Discretionary replacement of valve assemblies and damper actuators o All pneumatics to be removed and replaced o Electronic damper actuators and valve assemblies are brand and age dependent  All JCI damper actuators replaced with Belimo  If Belimo actuators are current, they will remain and be reused If there are existing pneumatically operating fire/smoke damper actuators, they will remain and stay in operation Benefits of the DDC controls upgrade include improved occupant temperature control, reduced energy consumption, reduced maintenance, improved equipment scheduling and troubleshooting, alarm monitoring, operational tracking and trending of mechanical equipment parameters.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS CONTROLS SYSTEM IMPROVEMENTS HS-MP-1 Upgrade Building Controls and Convert Remaining Pneumatic to Direct Digital Controls (DDC) Replace all the pneumatic components with DDC on HVAC equipment that is being re-used as well as the new equipment • Replace the existing failing DDC controls with the new building automation system platform with remote access • Provide DDC controllers and control panels • Provide all programming required for this conversion HS-MP-1 Benefits •

• • • • • •

Easy to use, modernized system control updates Improved building monitoring and maintenance troubleshooting Improved occupant comfort Extended heating system life Reduced energy consumption Reduced maintenance

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS HEATING SYSTEM IMPROVEMENTS Heating Improvements, Including Replacing 10 Unit Heaters in Tech Ed, Pool, Locker Rooms, etc., Add Individual Room Controls for Student Services Nexus recommends the following upgrades: -

There are about ten (10) 1976/1986 suspended unit heaters located in the tech ed, pool, and locker room areas at the High School. Nexus recommends replacing these old heaters with new hot water suspended unit heaters that are more efficient. These spaces would be calculated to determine the heat loss of the space so the unit heater can be appropriately sized.

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Add individual control for the existing finned tube radiation (FTR) located in the exterior student services rooms as shown in the picture to the right. New thermostats and control valves would be installed so the temperature in these spaces can be controlled individually.

Replace Grooved Heating Piping Gaskets and Leaking Valves (Estimated 100) - There are a number of grooved heating piping gaskets throughout the building that have failed and are leaking. Nexus recommends removing these gaskets and directly welding the pipes together as required by the district. Nexus has budgeted/estimated 100 of these gaskets to be welded.

Add New Hot Water Heating to Perimeter Rooms Including Band, Math Wing, and East Classrooms - The band, math, and east classroom areas of the High School have no perimeter radiation as shown in the floor plan below. Nexus recommends adding new hot water radiant ceiling panels to these spaces to provide additional heating capacity for the cold seasons.

New hot water piping would be extended to the new radiant ceiling panels from the nearest hot water mains. All associated valves and controls would be provided and installed as required.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS Benefits of these heating system improvements include reduced maintenance, increased heating system life, and improved system operation.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS HEATING SYSTEM IMPROVEMENTS HS-MP-2, 3, 4 Miscellaneous Heating System Improvements • Remove 1976/1986 suspended unit heaters located in the tech ed, pool, and locker room areas at the High School • Install new hot water suspended unit heaters and associated piping • Install new thermostats and control valves for FTR located in student services for individual room control • Demo grooved heating piping gaskets and weld pipes together as required by the School District • Install new radiant ceiling panels in band, math, and East classroom areas of the High School • Provide DDC controls, sequencing, and programming • Provide all associated general construction and electrical work as required HS-MP-2, 3, 4 Benefits • Upgraded heating system • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved learning/work environment

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS VENTILATION SYSTEM IMPROVEMENTS Replace 1998 Roof Top Unit (RTU) Serving Fitness Room and Fan Coil Unit (FCU) Serving Tech/Staff Rooms, Remove Health Room RTU and Remove FCU-2, Outside and Relief Air Hoods. Add Ventilation from Adjacent AHUs to Cover Spaces from Removed Units.

There are several rooftop and fan-coil air handling units serving the Chisago Lakes High School that are becoming maintenance problems for the District. These units are as listed below.

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1998 AAON RTU-1 that serves the fitness center (Wildcat Dance Studio).

This rooftop air handling unit currently has R-22 DX cooling and gas heating. Nexus recommends replacing the rooftop air handling unit serving the fitness center (Wildcat Dance Studio) one for one with a new double wall rooftop air handling unit with hot water heating and DX dehumidification. The new rooftop air handling unit would come with code compliant filtration, hot water heating coils, DX dehumidification coils, access sections, and supply fans with variable speed drives (VSDs).

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1998 Lennox RTU that serves the health room only. This rooftop air handling unit currently has R-22 DX cooling and no heating. Nexus recommends removing this unit entirely as it is no longer needed.

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1998 FCU-1 and mated 2000 ACCU that serves two (2) spaces in the tech area. This fan coil air handling unit currently has R-22 DX cooling and hot water heating. Nexus recommends removing this fan coil unit and mated condensing unit entirely and extending new ductwork to ventilate these two (2) spaces from an adjacent air handling unit.

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1998 FCU-2 that serves building storage room adjacent to the boiler room.

This fan coil air handling unit currently has no cooling and hot water heating. This unit used to provide make-up air for a boiler that is no longer there. Nexus recommends removing this unit entirely as it is no longer needed and providing some ventilation air from adjacent air handling unit.

The benefits of this HVAC improvement include increased system life expectancy, improved DDC scheduling, improved ventilation, increased energy savings, improved occupant comfort, and an improved learning and working environment.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS VENTILATION SYSTEM IMPROVEMENTS HS-MP-5 Replace 1998 Roof Top Unit (RTU) Serving Fitness Room and Fan Coil Unit (FCU) Serving Tech/Staff Rooms, Remove Health Room RTU and Remove FCU-2, Outside and Relief Air Hoods. Add Ventilation from Adjacent AHUs to Cover Spaces from Removed Units.

• Remove existing rooftop and fan-coil air handling units, piping, and controls • Provide new double wall rooftop air handling unit with hot water heating and DX dehumidification for fitness center • Extend new ductwork from adjacent air handling unit to serve the two (2) spaces in tech ed • Extend new ductwork from adjacent air handling unit to serve the building storage room • Provide variable speed drives for the supply and relief fans • Provide all roofing and sealing work as required • Provide DDC controls, sequencing, and programming • Provide all associated general construction and electrical work as required HS-MP-5 Benefits • Upgraded HVAC infrastructure • Increased ventilation for improved indoor air quality • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved learning/work environment

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS VENTILATION SYSTEM IMPROVEMENTS Replace 1998 Energy Recovery RTUs (Qty 4) There are four (4) 1998 rooftop energy recovery air handling units serving the Chisago Lakes High School that are still in good shape but should be considered for replacement in ten (10) years. These units provide outside air to downstream air handing units. These units are as listed below.

- ERU-1 provides outside air to units AHU-S1, AHU-S2, and AHU-S3.

- ERU-2 provides outside air to units AHU-7, AHU-8, AHU-9, and AHU-10.

- ERU-3 provides outside air to units AHU-15, AHU-16, AHU17, and AHU-18.

- ERU-4 provides outside air to units AHU-S5 and AHU-S8.

Nexus recommends replacing these rooftop air handling units in ten (10) years one for one with a new double wall rooftop air handling units with energy recovery. The new rooftop air handling units would come with code compliant filtration, access sections, and supply fans with variable speed drives (VSDs).

The benefits of this HVAC improvement include increased system life expectancy, improved DDC scheduling, improved ventilation, increased energy savings, improved occupant comfort, and an improved learning and working environment.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS VENTILATION SYSTEM IMPROVEMENTS HS-MP-6 Replace 1998 Energy Recovery RTUs (Qty 4) • Remove existing rooftop energy recovery air handling and controls • Provide new double wall rooftop energy recovery air handling units • Provide variable speed drives for the supply and relief fans • Provide all roofing and sealing work as required • Provide DDC controls, sequencing, and programming • Provide all associated general construction and electrical work as required HS-MP-6 Benefits • Upgraded HVAC infrastructure • Increased ventilation for improved indoor air quality • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved learning/work environment

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS VENTILATION SYSTEM IMPROVEMENTS Replace 1986 Air Handling Units (AHU) Serving the Boys Locker Room (AHU-11) and the Choir/Band Rooms (AHU-12); and Two Make Up Air Units Serving the Paint Booths. Replace Dust Collector. Add Dehumidification (Cooling) to Boys Locker Room and Choir/Band Room.

There are several air handling units (AHUs) serving the High School that are becoming maintenance problems for the District. Some of the air handling units also have no means of dehumidification.

The lack of dehumidification results in higher humidity levels and occupant discomfort. The areas are also unable to meet the American Society of Heating and Refrigeration Engineer’s (ASHRAE) Thermal Environmental Conditions for Human Occupancy Standard 55. This ASHRAE design standard specifies the combinations of personal and indoor thermal environmental requirements necessary to achieve an occupant comfort satisfaction rate of 80% or greater.

These indoor environmental requirements include temperature, thermal radiation, humidity, and air speed.

These air handlings units are listed below.

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1986 AHU-11 that serves the boys locker rooms. This air handling unit currently has hot water heating and no dehumidification.

Nexus recommends replacing AHU-11 one for one and adding dehumidification.

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1986 AHU-12 and mated 2004 ACCU that serves choir, band, and classrooms. This air handling unit currently has no heating and R22 DX dehumidification. Nexus recommends replacing AHU-12 one for one.

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1986 AHU-4 and AHU-5 that serve the paint booth to provide make-up air. These air handling units currently have hot water heating and no dehumidification. Nexus recommends replacing AHU-4 and AHU-5 with a single new make-up air handling unit.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS The existing wood dust collector at the High School is 1976 vintage.

This antiquated unit does not adequately remove dust from the woodworking spaces due to age-related wear and tear and component failure. This compromises air quality when the woodworking spaces are in use.

Nexus recommends replacement of this dust collector unit with a new modern International Mechanical Code (IMC) compliant system. New dust collection ductwork would be installed where required and routed to each piece of equipment requiring dust collection if existing ducts cannot be re-used.

This upgrade will ensure adequate dust collection in the woodworking spaces, increasing indoor air quality and providing reliable unit operation.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS Replace Thirteen AHUs Serving the 1976 Addition that Includes the North Wrestling Room, Three Locker Rooms, Gym, Classrooms, Lecture Hall, Wood Shop, Art and Ag Classrooms, Tech, and Student Services. Add Dehumidification to these Thirteen AHUs. There are multiple air handling units (AHUs) serving the High School that are becoming maintenance problems for the District. Some of the air handling units also have no means of dehumidification.

The lack of dehumidification results in higher humidity levels and occupant discomfort. The areas are also unable to meet the American Society of Heating and Refrigeration Engineer’s (ASHRAE) Thermal Environmental Conditions for Human Occupancy Standard 55. This ASHRAE design standard specifies the combinations of personal and indoor thermal environmental requirements necessary to achieve an occupant comfort satisfaction rate of 80% or greater. These indoor environmental requirements include temperature, thermal radiation, humidity, and air speed.

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1976 AHU-1 that serves the North part of the wrestling room. This air handling unit currently has hot water heating and no dehumidification. Nexus recommends replacing AHU-1 one for one and adding DX dehumidification.

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1976 AHU-2 that serves the North part of the girl’s locker room. This air handling unit currently has hot water heating and no dehumidification. Nexus recommends replacing AHU-2 one for one and adding DX dehumidification.

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1976 AHU-4 that serves the South part of the girl’s locker room. This air handling unit currently has hot water heating and no dehumidification. Nexus recommends replacing AHU-4 one for one and adding DX dehumidification.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS •

1976 AHU-5 that serves the 1974 Gym. This air handling unit currently has hot water heating and no dehumidification. Nexus recommends replacing AHU-4 one for one and adding DX dehumidification.

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1976 AHU-7 and mated 2002 ACCU that serves classrooms. This air handling unit currently has hot water heating and R22 DX dehumidification. Nexus recommends replacing AHU-7 one for one.

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1976 AHU-8 and mated 2002 ACCU that serves classrooms. This air handling unit currently has hot water heating and R22 DX dehumidification. Nexus recommends replacing AHU-8 one for one.

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1976 AHU-9 and mated 2002 ACCU that serves classrooms. This air handling unit currently has hot water heating and R22 DX dehumidification. Nexus recommends replacing AHU-9 one for one.

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1976 AHU-10 and mated 2002 ACCU that serves classrooms. This air handling unit currently has hot water heating and R22 DX dehumidification. Nexus recommends replacing AHU-10 one for one.

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1976 AHU-15 and mated 2002 ACCU that serves student services. This air handling unit currently has no heating and R22 DX dehumidification. Nexus recommends replacing AHU-15 one for one and adding hot water heating.

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1976 AHU-16 that serves the locker commons. This air handling unit currently has hot water heating and no dehumidification. Nexus recommends replacing AHU-16 one for one and adding DX dehumidification.

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1976 AHU-17 and mated 2002 ACCU that serves the tech ed spaces.

This air handling unit currently has hot water heating and R22 DX dehumidification. Nexus recommends replacing AHU-17 one for one.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS •

1976 AHU-18 and mated 2002 ACCU that serves student services.

This air handling unit currently has no heating and R22 DX dehumidification. Nexus recommends replacing AHU-18 one for one and adding hot water heating.

•

1976 AHU-19 that serves the wood shop. This air handling unit currently has hot water heating and no dehumidification. Nexus recommends replacing AHU-19 one for one and adding DX dehumidification.

The new air handling units would come with code compliant filtration, heating water coils, DX dehumidification coils, access sections, and supply fans with variable speed drives (VSDs).

The benefits of this HVAC improvement include increased system life expectancy, improved DDC scheduling, improved ventilation, increased energy savings, improved occupant comfort, and an improved learning and working environment.

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FACILITY CONDITIONS VENTILATION SYSTEM IMPROVEMENTS HS-MP-7.1, 7.2, 8.1, 8.2 Air Handling Unit and Air-Cooled Condensing Unit Replacements and DX Dehumidification Addition • Remove existing air handling units, air-cooled condensing units, piping, and controls • Provide new double wall indoor air handling units with hot water heating and DX dehumidification • Provide new mated air-cooled condensing units and associated refrigerant piping • Provide variable speed drives for the supply and relief fans • Provide all roofing and sealing work as required • Provide DDC controls, sequencing, and programming • Provide all associated general construction and electrical work as required HS-MP-7.1, 7.2 ,8.1, 8.2 Benefits • Upgraded HVAC infrastructure • Increased ventilation for improved indoor air quality • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved learning/work environment

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS COOLING SYSTEM IMPROVEMENTS Replace (8) R-22 Air-Cooled Condensing Units and Associated Coils in Units Serving the Gym, Pool, Wrestling, Foyer, Stage, and Cafeteria The are currently eight (8) air-cooled condensing units at the High School that are starting to corrode and deteriorate. These 20-year-old plus condensing units are still utilizing R-22 refrigerant which has become obsolete and far less efficient than today’s systems. These units are listed below.

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1998 ACCU-5. This is a 32-ton condensing unit that is mated with air handling unit AHU-S5 that serves the foyer.

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1998 ACCU-6. This is a 20-ton condensing unit that is mated with air handling unit AHU-S6 that serves the stage.

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1998 ACCU-7. This is a 60-ton condensing unit that is mated with air handling unit AHU-S8 that serves cafeteria.

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2002 ACCU-S1. This is a 40-ton condensing unit that is mated with air handling unit AHU-S1 that serves the science classrooms.

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2002 ACCU-S2. This is a 50-ton condensing unit that is mated with air handling unit AHU-S2 that serves the media center and classrooms.

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2003 ACCU-3. This is a 40-ton condensing unit that is mated with air handling unit AHU-3 that serves the South part of the wrestling room.

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2005 ACCU-2. This is a 100-ton condensing unit that is mated with air handling unit AHU-S7 that serves the 1998 gym.

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2005 ACCU that serves the pool air handling unit. This is a 55-ton condensing unit. The pool air handling unit also has six (6) supply fan motors located in the unit. Three (3) of these fan motors were replaced in 2022 and the remaining three (3) are original to the unit. The original motors have started to fail and should be replaced. Nexus recommends the replacement of the three (3) original fan motors in addition to the aircooled condensing upgrades noted below.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS Nexus recommends replacing all eight (8) of these old inefficient aircooled condensing units and their mated DX cooling coils with new aircooled condensing units and associated DX cooling coils with American Society of Heating and Refrigeration Engineer’s (ASHRAE) code compliant refrigerant that is more energy efficient and environmentally friendly. New refrigerant piping would be installed as required for the new refrigerant.

Benefits of this cooling system upgrade include increased energy savings, reduced maintenance, improved system operation, and reduced environmental impact.

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS COOLING SYSTEM IMPROVEMENTS HS-MP-9A Replace Eight (8) R-22 Condensing Units and Associated Coils in Units Serving the Gym, Pool, Wrestling, Foyer, Stage, and Cafeteria • Provide new DX cooling coils with code compliant refrigerant • Provide new air-cooled condensing units • Provide new refrigerant piping to air handling units as required for new refrigerant • Provide all roofing and sealing work as required • Provide DDC controls, sequencing, and programming • Provide all associated general construction and electrical work as required HS-MP-9A Benefits • Upgraded HVAC infrastructure • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved learning/work environment

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CHISAGO LAKES HIGH SCHOOL

FACILITY CONDITIONS COOLING SYSTEM IMPROVEMENTS Replace the R-22 Cooling Systems with a New Chilled Water Plant that Serves the Entire High School As a secondary cooling option in lieu of the DX additions noted above, Nexus recommends the addition of an air-cooled chiller to serve the High School.

This chiller would be sized to serve all the rooftop and indoor air handling units in the building with some capacity for any future addition of cooling. All existing DX air handing units would be converted to chilled water except for the 2018 RTU-1 and MAU-1 that serves manufacturing/Ag, the 2018 Carrier ACCU-4 that serves the auditorium, the 2019 AHU-4 and ACCU-4 that serves the tech area, and the 2021 Trane ACCU that serves the media center/classrooms. New chilled water piping mains would be installed throughout the building as required and would be sized for the potential future addition of cooling.

The benefits of this HVAC improvement include increased system life expectancy, improved DDC scheduling, improved ventilation, improved occupant comfort, and an improved learning and working environment.

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FACILITY CONDITIONS COOLING SYSTEM IMPROVEMENTS HS-MP-9B Replace the R-22 Cooling Systems with a New Chilled Water Plant that Serves the Entire High School • Install new air-cooled chiller, pumps, and chilled water main distribution piping • Install new chilled water-cooling coils for each air handling unit • Install new chilled water piping to air handling units as required for cooling addition • Provide propylene glycol, glycol fill station, and side-stream filter for the new chilled water system • Provide all roofing and sealing work as required • Provide DDC controls, sequencing, and programming • Provide all associated general construction and electrical work as required HS-MP-9B Benefits • Upgraded cooling infrastructure • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved learning/work environment

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FACILITY CONDITIONS VENTILATION SYSTEM IMPROVEMENTS Replace Eight (8) Air Handling Units Serving the 1998 Additions and One (1) 2003 Serving the Girl’s Locker Room There are eight (8) 1998 air handling units and one (1) 2003 AHU serving the Chisago Lakes High School that are still in good shape but should be considered for replacement in ten (10) years. These units are as listed below.

•

1998 AHU-1 that serves the science classrooms. This air handling unit currently has hot water heating and DX dehumidification.

•

1998 AHU-2 that serves the locker commons. This air handling unit currently has hot water heating and DX dehumidification.

•

1998 AHU-3 that serves the media center and classrooms. This air handling unit currently has hot water heating and DX dehumidification.

•

1998 AHU-4 that serves the auditorium. This air handling unit currently has hot water heating and DX dehumidification.

•

1998 AHU-5 that serves the foyer. This air handling unit currently has hot water heating and DX dehumidification.

•

1998 AHU-6 that serves the stage. This air handling unit currently has hot water heating and DX dehumidification.

•

1998 AHU-7 that serves competitive gym. This air handling unit currently has hot water heating and DX dehumidification.

•

1998 AHU-8 that serves the cafeteria. This air handling unit currently has hot water heating and DX dehumidification.

•

2003 AHU-3 that serves the South wrestling room. This air handling unit currently has hot water heating and R22 DX dehumidification.

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FACILITY CONDITIONS The new air handling units would come with code compliant filtration, heating water coils, DX dehumidification coils, access sections, and supply fans with variable speed drives (VSDs).

The benefits of this HVAC improvement include increased system life expectancy, improved DDC scheduling, improved ventilation, increased energy savings, improved occupant comfort, and an improved learning and working environment.

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FACILITY CONDITIONS VENTILATION SYSTEM IMPROVEMENTS HS-MP-10 Replace Eight (8) Air Handling Units Serving the 1998 Additions and One (1) 2003 Serving the Girl’s Locker Room • Remove existing air handling units, piping, and controls • Provide new double wall indoor air handling units with hot water heating and DX dehumidification • Provide variable speed drives for the supply and relief fans • Provide all roofing and sealing work as required • Provide DDC controls, sequencing, and programming • Provide all associated general construction and electrical work as required HS-MP-10 Benefits • Upgraded HVAC infrastructure • Increased ventilation for improved indoor air quality • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved learning/work environment

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FACILITY CONDITIONS EXHAUST/VENTILATION SYSTEM IMPROVEMENTS Add Overhead Exhaust Range Hoods to FACS and Ag Classrooms, Replace Exhaust Fans (Qty 50), Add Exhaust to Art Room and Laser Engraver, Add Thermal Equalizers to 1998 Gym There are over 100 total inline and rooftop exhaust fans at the High School. Many of these exhaust fans have exceeded their recommended service life and are in need of replacement.

Nexus recommends replacing some of these fans when major work is taking place so the best pricing can be obtained from the contractors. Nexus has budgeted for the replacement of fifty (50) existing exhaust fans for the school. Nexus will work along with the District on the priority of which ones want to be replaced.

Fans will be a direct replacement to the original size/capacity but will have premium efficiency motors installed to increase energy savings. The fan size/capacity may be reduced if engineering can justify where over ventilation is occurring.

The benefits of this HVAC improvement will result in increased energy savings, improved flow and reduced maintenance for exhaust fans, and reduced leaks from seals.

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The existing range ovens in the FACS (Qty 6) and Ag (Qty 2) classrooms have no exhaust hoods. There are currently exhaust grilles located in the ceiling above which are inadequate and don’t meet code. Nexus recommends adding new overhead exhaust range hoods in FACS and Ag classrooms. The hoods would be ducted directly out to a new exhaust fan on the roof.

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The Art 2 room as shown in the picture below currently has no space exhaust which is not code compliant. ASHRAE 62.1 Ventilation and Acceptable Indoor Air Quality requires art classrooms to be exhausted at a rate of 0.7 CFM per square foot. Nexus recommends adding a new exhaust system for the art classroom consisting of new grilles, ductwork, and rooftop exhaust fan.

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FACILITY CONDITIONS -

The laser engraver located in the tech classroom currently has no exhaust system. The District has already received a quote to add new exhaust ductwork and exhaust fan for the laser engraver. Nexus recommends the addition of a new exhaust system for the laser engraver.

These exhaust upgrades will increase indoor air quality, improve occupant comfort, and reduce maintenance.

The existing 1998 gym currently suffers from temperature stratification due to the height of this space. Warmer air migrates to the ceiling making it difficult to achieve proper temperature control, especially in winter.

Nexus recommends the installation of thermal equalizer destratification fans in the 1998 gym (Qty 6) to ensure proper ventilation.

Benefits of these improvements include energy savings, improved temperature control and occupant comfort.

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FACILITY CONDITIONS EXHAUST/VENTILATION SYSTEM IMPROVEMENTS HS-MP-11 Add Overhead Exhaust Range Hoods to FACS and Ag Classrooms, Replace Exhaust Fans (Qty 50), Add Exhaust to Art Room and Laser Engraver, Add Thermal Equalizers to 1998 Gym • Replace exhaust fans with new exhaust fans with associated ductwork • Add new overhead exhaust hoods, associated ductwork, and exhaust fan in FACS and Ag classrooms • Add new ceiling exhaust grilles, associated ductwork, and exhaust fan in Art 2 • Add new exhaust system for the tech ed laser engraver as per quote received from district • Provide all roofing and sealing work as required • Install thermal equalizers in 1998 gym • Wire thermal equalizers to wall switch/controls • Provide DDC controls, sequencing, and programming • Provide all associated general construction and electrical work as required HS-MP-11 Benefits • Upgraded exhaust system infrastructure • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved work environment

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FACILITY CONDITIONS PLUMBING SYSTEM IMPROVEMENTS Plumbing Upgrades Including Replacing Non-ADA Was Stations, Electric Water Coolers, and Drinking Fountains. Replace Science Room Faucets, Column Showers, Urinal and Flush Valves, and Sump Pumps There are many plumbing devices that are starting to increase in maintenance/non-ADA compliant and should be replaced. See below for this equipment.

• Non-ADA Wash Fountain (Qty 3) • Electric Water Coolers (Qty 16) • Drinking Fountains (Qty 5) • Science Room Faucets (Qty 90) • Column Showers (Qty 8 Columns, Qty 40 Heads) • Timer Flush Urinal Replacements in Toilet Rooms (Qty 11) • Sump Pumps (Qty 2) • Leaking Roof Drains (Qty 3) Nexus recommends replacing these existing plumbing fixtures one for one with new ADA compliant fixtures. Plumbing piping would be modified as required for the new fixtures.

Replacing these plumbing fixtures would provide reduced water consumption, reduced maintenance, and extended life expectancy of the plumbing system.

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FACILITY CONDITIONS PLUMBING SYSTEM IMPROVEMENTS HS-MP-12,13 Plumbing Upgrades Including Replacing Non-ADA Wash Stations, Electric Water Coolers, and Drinking Fountains. Replace Science Room Faucets, Column Showers, Urinal and Flush Valves, Sump Pumps and Leaky Roof Drains • Demo existing wash stations, electric water coolers, drinking fountains, sump pumps, column showers, urinals, and leaky roof drains • Provide and install new ADA compliant fixtures one for one • Modify existing plumbing piping as required for new fixtures • Provide associated general and electrical construction work as required HS-MP-12,13 Benefits • • • •

Improved occupant comfort Improved plumbing fixture operation Increased equipment life Reduced maintenance

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FACILITY CONDITIONS PLUMBING SYSTEM IMPROVEMENTS Replace Sanitary Lines Under Boiler Room The sanitary lines and drains in the boiler room are corroded and deteriorating. These sanitary lines are original to the building and should be replaced.

Nexus recommends sawcutting the existing sanitary lines out and demolishing them. New sanitary piping and floor drains would then be installed.

Replacing these sanitary lines would reduce maintenance and extend the life expectancy of the sanitary system.

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FACILITY CONDITIONS PLUMBING SYSTEM IMPROVEMENTS HS-MP-14 Replace Sanitary Lines Under Boiler Room Saw cut and remove existing sanitary lines as required Install new sanitary piping and floor drains Provide associated general construction work as required HS-MP-14 Benefits • • •

• • •

Improved sanitary system Increased equipment life Reduced maintenance

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FACILITY CONDITIONS FIRE PROTECTION SYSTEM IMPROVEMENTS Extend Fire Protection Sprinkler System with New Water Service to Non-sprinkled areas The existing Chisago Lakes High School has fire protection in all areas of the building except the areas as highlighted in yellow in the floor plan to the right. Therefore, these areas are not protected from property loss or life safety in the event of a fire.

Installing fire protection sprinklers in buildings significantly enhances safety by automatically discharging water to suppress fires upon heat detection. According to the National Fire Protection Association (NFPA), buildings equipped with sprinklers see a lower rate of fire-related injuries and property damage compared to those without, highlighting their effectiveness.

Moreover, retrofitting buildings with these systems ensures compliance with modern safety standards and can lead to lower insurance premiums due to reduced risks of fire damage. Fire sprinkler systems also require minimal maintenance, ensuring durability and consistent performance over time, making them a reliable choice for enhancing safety.

Nexus proposes installing a fire protection sprinkler system for all the highlighted areas of the Chisago Lakes High School.

Installation is a proactive measure to protect students, staff, and property.

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FACILITY CONDITIONS FIRE PROTECTION SYSTEM IMPROVEMENTS HS-MP-15 Extend Fire Protection Sprinkler System with New water Service to non-sprinkled areas • •

Install new wet-pipe fire protection system to fully protect the entire building Provide all required general construction work

HS-MP-15 Benefits • •

Reduced damage during a fire event Increased occupant safety

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FACILITY CONDITIONS HVAC RETRO-COMMISSIONING Retro-Commission HVAC Equipment Building retro-commissioning is a systematic process that ensures all buildings perform as efficiently as possible according to the owner’s operational needs as well as adjustment of HVAC equipment’s operational parameters to meet current space use.

The Building Automation System (BAS) plays a crucial role in providing a comfortable, energyefficient environment for students, parents, and staff. Over time, damper and valve controls have gone out of proper adjustment, components fail, and controls sequences are modified and may not be programmed to provide an optimal balance between comfort, indoor air quality, and energy efficiency.

This Nexus Retro-commissioning Team will identify the root cause of HVAC equipment operational issues and will provide adjustments to the sequences and outdoor air setting to improve occupant comfort while reducing energy consumption where possible. The retrocommissioning process will also identify components that require adjustment or replacement.

Retro-commissioning activities include: HVAC Equipment: Nexus will verify existing HVAC equipment operation and control sequences through observation. We will provide adjustment and tuning services to achieve optimal operation and improved occupant comfort. Documentation of the findings with corrections and recommendations for further improvements will be made.

Services include: • Ventilation study to assure all spaces are ventilated per the current code requirements and the outdoor air setpoints will be adjusted up or down based on current space occupancy • Test point commands vs actual controller output at each device for heating, cooling, and mixed air control • Verify valve/damper operation on reheat coils and air handler coils • Verify indicated vs actual (duct static, supply and return temperatures) • Verify mixed-air operation (damper position and economizer operation)

Valves and Dampers: Nexus will test all existing rooftop (RTU) and indoor air handling unit (AHU) sequences along with the valve and damper operation to ensure control actuators are fully Page | 54

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FACILITY CONDITIONS operational. We observe valve/damper/actuator operation and check for any physical signs of valve/damper leakage or binding, which results in operational issues and increased energy consumption. We check discharge temperature with valves in the fully open and closed positions. In addition, we will provide unit pricing to replace any defective valves and/or actuators. Proper RTU and AHU operation provides improved occupant comfort at optimal energy efficiency.

Zone Reheat Valves: Nexus will test existing zone reheat valves for proper operation. We ensure command valves fully open and close and observe valve/actuator operation. We inspect valves for any physical signs of valve leakage or binding, check discharge temperature with valve in the fully open and closed positions and provide unit pricing to replace any defective valves and/or actuators.

Economizer: Nexus will update the control sequence for mixed-air dampers to their setpoints with economizer lockout setpoints.

Heating Water Pump Variable Speed Drives (VSDs): Nexus will lower the pressure setpoint to allow drives to modulate down to the slowest speed required to satisfy the most critical room temperature sensor.

Boilers: Nexus will optimize sequencing and staging of equipment and adjust the water reset schedules based on outside air temperature.

The action steps noted above are part of the Nexus retro-commissioning process. The benefits of this process include improved temperature control and occupant comfort, reduced energy consumption, reduced maintenance, and extended HVAC equipment life.

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FACILITY CONDITIONS HVAC SYSTEM RETRO-COMMISSIONING HS-MP-16 Retro-Commission HVAC Equipment • • •

Provide retro-commissioning of all existing HVAC systems Provide adjustments to existing sequences to improve HVAC system operation Verify operation of all dampers, actuators, valves, and terminal HVAC devices

HS-MP-16 Benefits • • • •

Improved temperature control and occupant comfort Reduced energy consumption Reduced maintenance Extended HVAC equipment life

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS Electrical power distribution upgrades including switchgear, panels and backup generator for critical loads including boiler, boiler pumps, emergency lighting, coolers and freezers (450 kw) Switchboard and panels The switchboard and panels that are original to the 1974 building are now 50 years old and are at the end of their useful life. The original manufacturer of these panels no longer exists, and replacement circuit breakers are not available.

Panelboards that were installed for the 1986 and 1998 additions appear to be in good condition. However, there is electrical equipment in the pool chemical room (installed in 1986) that should be replaced due to rusted enclosures.

It is recommended that the 1974 electrical panels and switchboard be replaced. New panels will provide a safer electrical system since new equipment will be in compliance with current manufacturing standards for electrical equipment and will reduce maintenance costs.

Equipment in the pool pump room shows signs of corrosion due to the environment. Corroded controllers should be replaced.

Equipment recommended to be replaced includes one switchboard, one distribution panel, and 19 panelboards. In addition, it is recommended that three motor controllers in the pool chemical room be replaced.

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FACILITY CONDITIONS Emergency/Standby Generator There currently is no emergency or backup generator. It is desired to have a generator that will provide backup power for life safety equipment, IT equipment, coolers and freezers, and boilers and pumps associated with the heating system. A generator would prevent damage to the building in the event of a power loss and the building freezing. With the life safety and IT equipment on the generator, communications with building occupants can be maintained in the event of a power loss in an emergency situation.

Increase the size of the generator from 450kw to 1,750kw to cover full building load including cooling (cost represents the increased cost between the two generators) Installing a generator with full building backup will allow the school to function, even when utility power is lost. Increasing the size of the generator from 450 kW to 1,750 kW will also allow the building to be cooled.

ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS HS-ES-1.1 Electrical Power Distribution Upgrades Including Switchgear and Panels in the 1958 Building • Replace original 1974 electrical panels • Replace two Switchboards • Replace 18 Panelboards • Install new generator – 450 kW • Install new automatic transfer switches, feeders, and electrical distribution HS-ES-1.2 Increase the size of the generator from 450 kw to 1,750 kw to cover full building load including cooling (cost represents the increased cost between the two generators) • Install new generator sized for entire building load including cooling – 1,750 kW • Install new automatic transfer switches, feeders, and electrical distribution HS-ES-1.1, 1.2 Benefits • • • •

Protection of and Improved Reliability of Electrical Infrastructure Reduced energy consumption Reduced maintenance Extended HVAC equipment life

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS LED lighting upgrade. Retrofit kits for fixtures in good condition, replacement for unique or outdated fixtures.

Light Fixture Upgrades The existing lighting in classrooms, gymnasiums, and common areas is primarily fluorescent lamps throughout. The fixtures appear to be in fair condition; however, LED lamp technology is more energy efficient.

Replacing the light fixtures with LED light fixtures will reduce energy use and maintenance costs. LED light fixtures have a life span of more than 50,000 hours and do not require lamp replacements, which reduces maintenance costs.

It is recommended that all light fixtures be replaced with new LED light fixtures.

Lighting Control Upgrades With LED light fixtures, dimming becomes a more viable standard.

Dimmable lighting allows the users of the space to adjust the light levels as needed to enhance learning for students. Implementing dimming and occupancy sensors not only improves the functionality of the space, it reduces energy use.

It is recommended that dimming and occupancy sensor lighting controls be implemented to enhance the functionality of the lighting and to reduce energy use.

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS HS-ES-2 LED Lighting Upgrade. Retrofit Kits for Fixtures in Good Condition, Replacement for Unique or Outdated Fixtures.

• • •

Replace light fixtures throughout the building with LED light fixtures Controls to provide dimming capabilities Automatic shutoff of lighting

HS-ES-2 Benefits • • •

Reduce energy costs Reduce maintenance costs Enhance safety

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS Replace existing fire alarm system with a voice evacuation system The existing fire alarm system is a Notifier system and is outdated. Current building codes require a voice evacuation fire alarm system in schools.

The existing system is not capable of supporting a voice evacuation system. It is recommended that the entire fire alarm system be replaced throughout with a voice evacuation system to provide a code compliant system and better safety for staff and students.

ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS HS-ES-3 Replace existing fire alarm system with a voice evacuation system • • • • • • •

Replace existing fire alarm panel and amp NAC panels Remote annunciators Smoke/heat and dust detectors Pull stations Monitor modules A/V Devices, speakers

HS-ES-3 Benefits • • •

Protection and improved reliability Improved safety Enhance security

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS Replace existing paging system and add audio enhancement to the remaining classrooms that is tied into the new paging system, replace common area speakers The existing paging system is outdated and needs to be replaced. Newer systems have better intelligibility and easier to use, making them more functional. Continual issues with the existing system also have continual maintenance costs to keep it operational.

Audio Enhancement systems for classrooms implement speakers and microphones in classrooms that enhance the learning experience for students.

These systems have become the standard for new classrooms. Audio enhancement systems for classrooms have become beneficial for teachers and students to enhance the audio in the room making it easier for students to listen and understand the teacher. There are audio enhancement systems in seven classrooms. Audio enhancement should be implemented in the remaining classrooms.

It is recommended that the paging system be replaced throughout the building and audio enhancement be implemented in classrooms. The paging and audio enhancement systems can utilize the same speakers for both functions to help manage costs of replacement and implementation.

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS HS-ES-4 Replace existing paging system and add audio enhancement to the remaining classrooms that is tied into the new paging system, replace common area speakers • Replace Paging system • Add audio enhancement to 51 classrooms • Add 5 corridor paging zones • Add 192 common area speakers • Server HS-ES-4 Benefits • • • •

Better zone paging Improved scheduling of notification bells Improved safety Enhanced learning environment

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS Add 10 new security cameras to existing system, upgrade cable serving telephone system and install vape sensors to locker rooms and restrooms.

There are several security system concerns that require attention. There is currently no visitor entry call system at the main entrance. Typically, there would be a pushbutton intercom with a camera that visitors activate to call the main office to be let into the building. This allows for a security checkpoint when visitors need to enter the building. Security cameras are approximately 5-6 years old. Although they still have 3-4 years left of their useful life, there are areas that need better camera coverage for better security.

Correcting these items will provide better security for staff and students.

Vape Sensors With the increase in vaping among students, implementing vape sensors in restrooms and locker rooms helps to prevent vaping. It is recommended that vape sensors be installed in these problem areas.

ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS HS-ES-5 Add 10 New Security Cameras to Existing System, Upgrade Cable Serving Telephone System and Install Vape Sensors to Locker Rooms and Restrooms • • •

Add 10 security cameras Add vape sensors to locker rooms and restrooms (qty 18) Upgrade cable serving telephone system

HS-ES-5 Benefits • • •

Protection and improved reliability Improved safety Enhance security

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS Install Additional Outlets in Classrooms The older areas of the building were not designed for the current need for outlets. For example, the older ag classrooms have 4 outlets each. Other classrooms have 10. Students need the outlets to keep the computers charged for the day. Adding more outlets will eliminate the need for extension cords used throughout the rooms.

ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS HS-ES-6 Install Additional Outlets in Classrooms •

Add additional outlets where needed to average 6 per room

HS-ES-6 Benefits • •

Improved charging stations Improved safety

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS The Ward and main gym sound systems are more than 25 years old. Replace both sound systems.

The existing sound systems in both the Ward gym and the main gymnasium are approximately 25 years old. This equipment has passed its useful life. It is recommended that this system be replaced.

ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS HS-ES-7 The Ward and main gym sound systems are more than 25 years old. Replace both sound systems.

•

Replace speakers and headend (Qty 2)

HS-ES-7 Benefits • •

Improved sound Improved functionality

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FACILITY CONDITIONS

ELECTRICAL, TECHNOLOGY AND SAFETY SYSTEMS Enhance security with upgraded burglar alarm including controller, keypads and sensors There is an existing burglar alarm intrusion detection system, but it is not currently functional. This system needs to be updated so it functions properly.

ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS HS-ES-8 Enhance security with upgraded burglar alarm including controller, keypads and sensors • • •

Install new burglar alarm Install 64 motion sensors Install 2 keypads

HS-ES-8 Benefits • •

Enhanced security Improved safety

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY AND SAFETY SYSTEMS In the auditorium, replace the existing sound system, the speaker power amplifiers, and add an additional amplifier with 3 panels. Update portable wireless intercom to an FCC compliant system. Replace assisted listening transmitter with a combination Wi-Fi/FM system.

Auditorium Speakers The auditorium is currently serviced by an aging main speaker system, consisting of two horn-loaded loudspeakers and two large horns and is original. 3D speaker simulation modeling of the space should be undertaken to determine the best coverage and help predict intelligibility.

The existing system be removed and replaced with a left/right array, allowing for multiple speaker patterns to cover the front and mid-section of the seating areas. As the catwalk area is easily accessible with structural iron in locations that allow for straightforward rigging, delay speakers could be added to provide better coverage in the rear seating area. Replacing these speakers and their associated amplifiers should be the top priority item for any updating of this space.

Audio Amplifiers Power amplifiers for the speaker system are aging and should be replaced. An additional amplifier is recommended to be added into the “Effects” speaker system that has output panels around the space (stage, seating and balcony areas).

Production Intercom System An older, portable wireless intercom system is currently in use, but no frequency information was visible. This system may be subject to FCC changes. It is recommended that the system be updated with a more robust, frequency compliant system that can be expanded in the future.

ADA Compliance An older FM assisted listening transmitter is mounted in the equipment rack, but there wasn’t a clear count on the number of beltpacks/receivers for this system. It is recommended that a combination WiFi/FM system be installed to increase the usability of the system. Signage placards should be installed to alert guests on how to connect to the system.

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS HS-ES-9 In the auditorium, replace the existing sound system, the speaker power amplifiers, and add an additional amplifier with 3 panels. Update portable wireless intercom to an FCC compliant system. Replace assisted listening transmitter with a combination Wi-Fi/FM system.

• Replace auditorium speakers • Replace power amplifier • Replace wireless intercom system • Replace assisted listening transmitter HS-ES-9 Benefits • • •

Enhanced sound in auditorium Improved wireless intercoms Improved hearing accessibility

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS A new auditorium audio console and breakout boxes should be installed that route through a dedicated audio network switch and a digital signal processing unit. Update the wireless microphones.

Audio System Inputs and Infrastructure Currently, all system inputs are routed to two patch panels in the control booth. This makes it straightforward to update and expand the capabilities of the audio system. The front of house mix position is in the control booth as well. This location presents difficulties in understanding the sound in the auditorium. The current audio mixer provides a control option via iPad that helps alleviate some of the difficulties, but having a wired position for the mixer in the auditorium would be beneficial. The mixer itself is primarily setup for analog inputs and outputs. This presents difficulty in expansion and routing.

The system would greatly benefit from a new console and breakout boxes which route through a dedicated audio network switch and digital signal processing unit. Two breakout I/O devices would be dedicated to on-stage use, while the other would be rack mounted to allow reuse of some of the existing analog infrastructure. In this case, the processor can also do double-duty as a control processor for AV presentations. Updating the console would also assist in teaching students a more modern workflow on audio mixers.

Wireless microphone systems Four single wireless microphone systems are mounted in the rack with frequency bands not identified.

Updating the wireless microphone system with a common antenna and network audio outputs is recommended. This will also provide FCC frequency compliance well into the foreseeable future.

The number of required wireless units would need to be discussed.

Microphone input, video inputs, intercom and effects speaker patch plates from the original construction are found at stage left, stage right, both sides of the audience seating area, in the booth and on the stage lip. It is likely the raceway and locations can be repurposed for the needed remote breakout box network audio connections.

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FACILITY CONDITIONS

HS-ES-10 A new auditorium audio console and breakout boxes should be installed that route through a dedicated audio network switch and a digital signal processing unit. Update the wireless microphones.

Install new console and breakout boxes with dedicated audio network switch and digital signal processing unit Two breakout I/O devices on-stage Install rack mounted breakout devices Update wireless microphones

• • • •

HS-ES-10 Benefits •

Processor can be used as a control for AV presentations

•

Students learn modern workflow on audio mixers

•

FCC compliant microphones

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FACILITY CONDITIONS ELECTRICAL, TECHNOLOGY, AND SAFETY SYSTEMS The auditorium video system should be upgraded to a new HD switcher, PTZ cameras, camera control system and a streaming appliance. Upgrade the existing projector and backstage monitors. Two new control panels should be installed: control booth and backstage left.

Video Systems The auditorium is currently utilizing portable video cameras, typically operated from the balcony railing. These cameras provide SD, composite video down to the video switcher in the control booth. The video switcher has four camera inputs, no control or image adjustments. The auditorium and students would benefit from updating this system to an HD switcher, PTZ cameras, camera control system and streaming appliance.

The existing projection screen should be evaluated for surface integrity, size and aspect ratio.

The existing projector should be replaced with a brighter, higher resolution and 16:9 or 16:10 format system.

Back Of House Audio Visual There are currently five video monitors located throughout the backstage areas. These are in male & female dressing rooms, the common area, backstage and green room. Composite video signal is delivered to these, being routed out of the control booth video system. It is recommended that this system is updated to deliver HD content via network video and can be controlled/routed through the video production system.

Speakers in the auditorium lobby and backstage areas are serviced by existing analog mixer/amps. These devices have no remote-control capabilities. Control and a new amplifier for these areas would be integrated into audio DSP, video and control systems.

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FACILITY CONDITIONS Control Systems The auditorium has no existing control systems. It is recommended that two control panels being installed, connecting to the new AV system network. One device should be in the control booth and the other should be located backstage left. These devices would provide quick system preset recall for the sound and video systems.

HS-ES-11 The auditorium video system should be upgraded to a new HD switcher, PTZ cameras, camera control system and a streaming appliance. Upgrade the existing projector and backstage monitors. Two new control panels should be installed: control booth and backstage left.

• Install new HD switcher • Install PTZ cameras • Install a new camera control system • Streaming device • Upgrade projector • Upgrade backstage monitor • New control panels HS-ES-11 Benefits •

Updated video system

•

Ability to deliver HD content thru network video

•

Better control for sound and video systems

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA High priority doors: Replace 10 sets of double doors and 72 single interior doors through out the building. Replace the hardware on 23 interior doors. Replace coiling shutter at lecture hall. Re-key all door locks to comply with district wide Schlage standard.

The interior doors in the original building and 1986 addition are reaching the end of their useful life. Twenty three doors need only the hardware updated in the next 3 years. There are also a number of doors that need to be replaced along with the hardware. All of the door locks need to be re-keyed to comply with the District-wide Schlage standard. The coiling shutter outside of the lecture hall is damaged and needs to be replaced.

Refer to the following floor plan for information on what doors need replacement along with hardware changes.

Low priority doors: Replace doors in science wing, administration, and social studies area in the next 7 to 10 years.

The district should plan on replacing the doors in the 2000 addition within the next 10 years.

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FACILITY CONDITIONS

Doors & Hardware

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FACILITY CONDITIONS

INTERIOR FINISHES AND ADA HS-IA-1 High Priority Door Replacement, Hardware and Locks. Re-Key all Door Locks to Comply with District-Wide Schlage Standard • Replace locks on all doors to comply with district standard • Replace 10 double doors and hardware • Replace 72 single doors and hardware • Replace 23 hardware only HS-IA-3 Low Priority Door Replacement, Hardware and Locks.

•

Replace 41 single doors and hardware

HS-IA-1 and 3 Benefits • • • •

Improved building aesthetics Improved acoustics Improved security Improved functionality of building

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA Upgrade restrooms (14) and locker rooms (5) with new finishes The interior finishes in the restrooms in the original building and the 1986 addition need updating. There are alos a few in the 2000 addition that do not comply with ADA. The boys and girls gym locker rooms do not have accessible benches, showers and toilets. There are 14 restrooms that also have a lack of accessible features. Smaller restrooms that include the PAC green rooms, the coaches in the boys locker room, the shop tech room, the main maintenance office are included, along with larger restrooms such as the ones located near the media center corridor. (The cost of locker replacements is in HS-IA-7).

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INTERIOR FINISHES AND ADA HS-IA-2 Upgrade restrooms (14) and locker rooms (5) with new finishes • •

Update finishes in restrooms Replace restroom partitions

HS-IA-2 Benefits • • •

Improved building aesthetics Extending the life of the interior materials Improved functionality of building

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA In the Ward gym replace the existing wire glass windows on the east corridor. Remove bleachers on one side of gym and replace the bleachers on the other side. Replace the handrail on the staircases.

The Ward gym is in need of a few upgrades. The wire glass windows on the east corridor should be replaced due to safety and to improve visibility. The bleachers are damaged and do not meet ADA. Only one side of the bleachers needs replacement, while the other just needs to be removed.

Replace the handrails on the staircase.

HS-IA-4 Ward gym windows, bleachers and handrails • Replace wood floor in wood gym • Replace VCT in corridors with rubber tiles • Replace VCT and resilient flooring with LVT in areas marked on the plans • Replace worn carpet • Install carpet in music room HS-IA-4 Benefits • • •

Extending the life of the interior materials Reduce maintenance cost Improves facility aesthetics

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA High Priority Flooring The majority of the carpet and VCT should be replaced in the next three years. The VCT in high use areas such as the corridors and cafeteria, should be replaced with new rubber tiles as part of District-wide standardization.

Replace VCT flooring with a flooring material that requires less maintenance, such as an LVT. The original 1976 kitchen tile in the commons area and tech classrooms should be replaced with a combination of carpet and LVT. The needs in the Performing Arts Center are addressed HS-IA-12.

Low Priority Flooring A few classrooms have recently been recarpeted but may need replacement in the next 10 years. At that point consideration should be given to replacement.

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FACILITY CONDITIONS

FLOORING

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA

HS-IA-5 High Priority Flooring • Replace VCT in corridors, cafeteria and commons areas with rubber tiles • Replace worn outdated carpet • Replace tile with combination of carpet/LVT • Replace VCT with LVT • Repair terrazzo HS-IA-6 Low Priority Flooring •

Replace carpet with new carpet squares

HS-IA-5 & 6 Benefits • • •

Extending the life of the interior materials Reduce maintenance cost Improves facility aesthetics

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA High Priority Casework and Lockers The casework in the science classrooms, band, FACS, and the 3 classrooms east of band is in need of replacement. It is showing signs of damage and is not meeting the needs of the users. The lockers in the varsity and PE locker rooms for both men’s and women’s need to be replaced. The corridor lockers outside of the lecture hall also should be replaced.

Low Priority Casework Classrooms in the math wing and in the language arts will need the casework updated in the next 10 years.

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FACILITY CONDITIONS

Casework

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA HS-IA-7 High Priority Casework and lockers • • • • • • •

Replace casework in science classrooms including sinks Replace casework in FACs rooms (does not include appliances) Replace band cabinets and lockers in the classroom Replace casework in arts 2 and social studies 9 Replaces casework in sped rooms 2 and 4 Replace lockers in 4 locker rooms Replace corridor lockers outside of lecture hall

HS-IA-8 Low Priority Casework and lockers •

Replace casework in classrooms

HS-IA-7 & 8 Benefits • • •

Improved building aesthetics Extending the life of the interior materials Improved functionality of building

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA High Priority Wall Finishes The large gym, cafeteria and a few classrooms need to be repainted. This will brighten up the spaces, giving them a fresh, updated look. The demountable walls in the business classrooms are in poor to fair condition. They also allow sound carryover between classrooms causing disruptions.

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FACILITY CONDITIONS

Walls

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA HS-IA-9 High Priority Wall Finishes • • •

Paint main gym, cafeteria Paint indicated classrooms Replace demountable walls with sheet rock walls

HS-IA-9 Benefits • • •

Improved building aesthetics Extending the life of the interior materials Improved functionality of building

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA High Priority Ceiling We have reviewed the ceilings and exposed structures to determine what has reached the end of useful life, shows stains, or is beginning to sag. The majority of the acoustical tile in the classroom areas need to be addressed in the next 6 years, with some of the main corridors needing to be replaced in the next 3 years. The exposed ceilings in the locker commons, media center corridor, cafeteria and the west gym need to be painted. The auditorium is addressed in HS-IA-12.

Low Priority Ceilings: The business center and the math corridor can be updated in the next 10 years.

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FACILITY CONDITIONS

Ceilings

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA HS-IA-10 High Priority Ceilings • •

Replace ceiling as noted on the plans within the next 0-6 years Paint exposed ceilings in Ward gym, cafeteria, locker commons, media center corridor

HS-IA-11 Low Priority Ceilings • Replace ceiling as noted on the plans within the next 10 years HS-IA-1 Benefits • • •

Extending the life of the interior materials Reduce maintenance cost Improves facility aesthetics

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA High Priority Needs in auditorium including stage floor, acoustical panels and carpet The auditorium was built as part of the 2000 addition to the high school. After twenty five years the finishes including the ceiling, walls, floors, stage etc. need to be updated. The VCT flooring and carpeting all need to be updated. The wooden stage floor has holes and other damage. We recommend replacing it with “Stagelam” flooring. The acoustical treatment on the walls is in very poor condition. The floor plans below indicate recommended changes in the auditorium.

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA HS-IA-12 High Priority Needs in Auditorium • • • •

Install new stage floor Replace wall acoustical treatment Replace carpet Replace VCT flooring

HS-IA-12 Benefits • • •

Improved sound quality Increased safety on stage Improved functionality of building

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FACILITY CONDITIONS INTERIOR FINISHES AND ADA Replace Bleachers in Main competion Gym The bleachers in the main gym are in need of replacementat this time.

INTERIOR FINISHES AND ADA HS-IA-13 Replace Bleachers in main competition gym •

Replace bleachers with 16 rows on both sides

HS-IA-13 Benefits •

Improved safety

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FACILITY CONDITIONS SITE IMPROVEMENTS North drainage improvements: replace concrete walks and asphalt with new asphalt paths, install erosion control, improve roof drain system on north addition, and improve building utility connections. Regrade along exterior to improve water drain off.

Drainage Overview Water / dampness issues have been occurring within the building. Near these areas are the vertical corrugated metal pipes filled with drainage rock that were installed at the time the building was built. These were originally connected to drain tile and likely no longer functioning as designed. During review of the site it was noticed many areas do not have the recommended minimum fall of six inches within ten feet of the building.

Over time low spots along the walking paths have formed and cause water to sit on the pavement.

Recommendation is to order an updated survey to most accurately add storm sewer at each roof drain location along the building. The remaining rock drains are located on the east, north and west sides of the northern end of the building. Low areas along paths in the northeast corner can potentially be fixed by regrading and repaving, otherwise storm sewer could also be extended to those areas.

The pathways are in poor shape and should be replaced. New erosion control and regrading along the exterior will improve water drain off.

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FACILITY CONDITIONS SITE IMPROVEMENTS HS-SC-1 North Drainage Improvements • Asphalt pavement and concrete walk removal and replacement • Remove drainage rock and metal pipes at each roof drain location.

• Add catch basins or direct connect pipe to underground at each of the roof drain locations that are above ground.

• Add swales and increase slope away from building within the first ten feet wherever possible.

• Raise path or lower turf areas adjacent to grass to improve drainage and eliminate pooling.

• Add catch basin(s) in any locations drainage cannot be solved by changing grades alone.

• reseeding HS-SC-1 Benefits • • •

reduce water infiltration into the building safer walking paths improved storm water drainage

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FACILITY CONDITIONS PAVEMENT OVERVIEW Pavement Analysis During the site walk, some immediate concerns were noticed. Two sections of curb pulled away from the walk and left a gap along the bus loop. During the winters this gap will continue to widen. These curbs and the failing concrete at the east exit trench drain were the main areas of concern. Most concrete and curb is in good condition with just spot repairs required. A large concrete area that is failing near a less popular north exit can be replaced with asphalt when the paths are replaced. Other sinking concrete walk by a north door needs replacement immediately to keep additional water away from the building. The exterior shop storage area also has concrete that is starting to disintegrate. Those are a few examples of other areas around the site have a few panels needing replacement.

Most of the pavements around the building were recently installed or received a reclaim and repave at that same time. The loading dock area pavement was not rebuilt in its entirely, likewise a portion of the east drive along the community center that received a mill and overlay over some existing pavement. Pavement appears to be aging as expected and will benefit from continued maintenance of crack sealing and eventual chip seal,

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FACILITY CONDITIONS East parking and drives: spot replacement of asphalt pavement and concrete curb and gutter, retrench the concrete entrance The east parking and drive do not need to be replaced at this time. There are a few spots of curb work repair, spot concrete repair, and retrench the drain at the exit onto Oleander, and creak seal and sealcoat that should be done within the next 5 years. The full reclaim and repavement can be done within 12 years.

Renovate the existing loading dock area to improve traffic flow The loading dock drive will need concrete spot replacement, curb and gutter spot replacement and asphalt removal and replacement in the next 2 to 5 years. Consideration should be given to replacing with a slightly larger area.

South parking lot and drive: spot replacement of concrete curb, gutter and pavement Within the next 5 years spot replacement of concrete curb and gutter along with spot replacement of concrete pavement.

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FACILITY CONDITIONS

PAC storm sewer repair and spot repair of concrete pavement and curb and gutter. This includes the repair of the damaged stormwater piping coming from the building and replacement of 3 gates A storm sewer pipe near the PAC entrance is damaged and needs replacment. The pipe runs out to a catch basin in the PAC parking lot. The lot is in good shape, but it will need to be crack sealed, and sealcoat done in the next 5 years. The three manual yellow gates are showing signs of rust and need to be replaced.

PAC parking lot and west drive: replace asphalt pavement The PAC parking lot and west drive will need the asphalt removed and replaced in 5 to 10 years.

Center Field parking lot: reclaim and repave asphalt, add 300 feet of concrete curb and gutter, restripe and seed The parking lot north of the Varsity baseball field will need the asphalt removed and replaced in the next 6 to 10 years.

West parking lot: reclaim and repave asphalt, replace concrete where needed, install boulders between south field and drive The west parking lot will need spot treatment of the concrete pavement and the cub and gutter. In the next 6 to ten years the asphalt pavement should be removed and replaced. Large boulders could be placed along the west road to prevent driving on the fi

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FACILITY CONDITIONS OVERVIEW OF PAVEMENTS HS-SC-2, 3, 4, 5, 6, and 7 Parking lots Asphalt Maintenance • •

Regular maintenance schedule of most areas around the building section of the property over the next few years.

Most areas require crack seals for their next round of maintenance.

Curb and Gutter Replacement • •

Main area requiring replacement are the two areas at bus loop.

Majority of curb was new or already had damaged curb sections replaced within the last 5 years.

Concrete Pavements • •

A few areas around the site require spot replacement of concrete.

Majority of concrete is in good condition.

Pipe Replacement •

Remove and replace storm sewer line from building to first structure

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EDUCATIONAL ADEQUACY

EDUCATIONAL ADEQUACY Expand Exterior Patio, Door from Cafeteria, and Add Exterior Tables/Benches There exists space to the south of the cafeteria to create an outdoor area for eating lunch, social gathering and classroom space. The patio would be constructed of concrete and have weatherproof permanent seating. A door would be installed between the patio and the cafeteria for easy access.

Renovate Locker Rooms for Private Showers and Changing Stalls The existing boys and girls Phy Ed locker rooms are underutilized and in disrepair. They need significant upgrading. Additionally, in their current state, they do not comply with ADA, are difficult areas to supervise, and lack the proper amenities that students need in today’s world. The locker rooms would be completely renovated, including all of the finishes. The space would be reconfigured by replacing lockers to be right sized in terms of both quantity and size, updating the toileting and showers to meet ADA as well as align with desired plumbing counts of each, and creating a small amount of private changing and shower rooms. All locker rooms would be renovated to have equitable finishes and features. Scope includes creating functionally sized Phy Ed offices and consolidating some athletic storage.

Add Glass to Ward Gym along North Wall The Ward gym has been surrounded by additions over the years. To better connect the space to the surrounding corridors/building it would be beneficial to add interior glass between the north hallway and the north side of the gym. Similar to what exists on the east wall but without the wire glass.

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EDUCATIONAL ADEQUACY Create (3) Private Restroom Groups The current restrooms do not meet ADA requirements, have sightline issues, have finishes and fixtures past their useful life, and do not maximize the use of space. At three locations, the restrooms would be remodeled into multiple single-occupant toilet rooms. Each single-occupancy bathroom features full height walls and doors similar to those of a single user restroom design. This design also includes proper lighting, ventilation, and finishes to align with applicable building codes. Hand washing would remain supervisable as it would be located near the hallway, often with partial height walls. While this benefits privacy efforts, it also can increase overall efficiency of use as less lines/congestion can accumulate.

Remove Lockers from Commons and Renovate with Small Group Rooms, Revised Stairs with Railings, Soft Seating, Raise Ductwork, New Flooring, Etc. Students do not use lockers as they did in the past. Social dynamics around the student’s locker or a locker commons has changed with access to technology.

Students do not need access to their items as often as in the past, they also do not have as strong of a need for ‘personal space’ that the locker once provided. The existing student locker commons (aka “Senior Lockers/Commons”) can be repurposed to support flexible learning for all classrooms. This space can be recreated to allow for flexible furniture for teachers to take their students to as an extension of their classroom space to support learning in a different environment. Opportunities can be endless but include that it is sized for multiple class learning experiences where 3+ classrooms can get together to collaborate on a lesson or share large group instruction. The space could be used as a study hall or for small groups. The location of this area is next to many classrooms and internal windows can be created to increase supervision of the Learning Commons. Renovations would include replacement of end-of-life flooring as well as updating finishes and lighting to best align with the functions of the space.

Furniture and technology would be provided to support the variety of learning and group dynamics. Railings would be installed to eliminate the current fall hazard and a large corridor to the west side of the building created.

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EDUCATIONAL ADEQUACY Convert FACS Foods Area to Culinary Arts Lab Programming for culinary arts, specifically at a high school level, has evolved. It goes beyond basic meal preparation and learning to use residential kitchen appliances and into nutritional science and has moved into the realm of introducing skills for jobs and careers after graduation. The existing Foods Lab has multiple ‘residential-style’ kitchens with sinks, ranges, microwaves, with cabinets and countertop finishes that would be found in a residential setting. The goal would be to provide a slightly elevated experience where skills can be taught not only for day-to-day skills but as well as food-industry skills. The room would be renovated to support a more commercialized setting where skills that are more specific to culinary careers can be taught.

Renovations would include stainless steel work surfaces to represent a restaurant environment, more commercialized equipment to better expose students to career opportunities. These labs are still flexible and will be able to support all types of food instruction, without excluding the commercial setting as it does today. The goal is tied to a hybrid vision of learning the day to day meal prep and life skills yet allow for a true commercial kitchen workplace-ready experience as well.

Create Event Room for Pool Area, Eliminate Hot Tub Area to Construct Staff Office and Swim Equipment Storage Outside of athletics for the school’s successful swimming and diving teams, the community is a huge supporter of the pool as an amenity. The pool is often a place where families want to host a birthday party or other type of gathering or celebration.

However, there is no formalized place for this. Renovations would turn the existing office space into an event room that would be sized for tables and chairs, counter space for the host’s items, and have a view and close access to the kiddie pool/pool.

The room would also support pool staff meetings/training. The office would be relocated to the existing hot tub area, the hot tub eliminated, and general pool equipment storage would be expanded with direct access to the pool deck.

Install Permanent Sheetrock Walls in Business Area to Improve Acoustics. In the Ag Room, Math Entry, and Student Services Extend Walls from Ceiling to Roof Deck to Reduce Noise Transfer The business classroom suite is constructed of demountable walls and inefficient circulation paths. The rooms are inconsistent sizes and often too small for the class sizes. Some rooms were designed around a computer lab setting of the past and the proportion of the room is no longer suitable. The demountable walls pose a few issues, such as a reduced acoustical separation as compared to walls constructed for all the other classrooms in the area. Other issues include door swings and hardware due to the doors selected to best align with demountable walls. The wall system, doors and hardware, and teaching boards are past their useful life. The proposed renovation would remove all of these systems to create a more efficient layout of business classrooms that would be sized appropriately for both class size and quantity to meet scheduling needs. The suite would be configured to provide for some flexible learning area for student break-out work, as well as small group rooms that can be utilized by students, staff, and other conference needs. The flexible learning area would be located immediately outside of the classrooms so that teachers and staff can supervise students and be accessible to the students for any help/instruction.

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EDUCATIONAL ADEQUACY

Create Learning Commons Outside Media Center and Connect with Operable Glass Like the center locker commons, the lockers along the media center hallway are also not used. This space can be repurposed to support flexible learning, social gathering, and become the “learning main street” of the school Its proximity to the media center can be capitalized on be connecting the two spaces with an operable glass wall. The media center itself can be modernized with new furniture and paint. This new main street could be furnished with genius bars, booths, small group rooms, technology video displays, soft seating arrangements and a coffee shop/grab and go café.

Reconfigure SW Community Entrance for Security The student check-in/security desk at the student parking entry is too far from the interior entrance to the school. The desk would be moved closer to the door and electrified hardware would be added to the double doors that separate the school hallway from the Wildcat Community Center area. The doors would be controlled by a button located at the relocated security desk.

This desk could also have the ability to be a ticketing counter for swim meets or other pool events as well.

Reconfigure Center Administration Area The front reception and attendance workspace layout in the main office could be improved to make better use of space and increase the waiting area within the office.

Construct Training Center Addition The need for physical fitness and weight training is increasing both from an academic phy. ed., athletic performance, sports rehabilitation, and community demand. The recent construction Fitness/Weight room in the Wildcat Community Center is highly sought after and access is coveted by all users, creating a conflict that cannot be covered by scheduling. A smaller athletic training room would be created by an addition that focuses on the Phy-Ed/Athletic perspective and would be located near the athletic/PE locker rooms and the high school team gym. The training room would be sized for (8) weight racks, dumbbells, and open space for agility, aerobic, and class workout instruction, and a couple pieces of injury rehabilitation cardio equipment.

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EDUCATIONAL ADEQUACY New Flexible Classroom Furniture (50%) Most classrooms have outdated furniture or do not have sufficient flexible furniture available that will attract students to those areas. Comfortable and inviting furniture has been studied to be as important to the spaces as the lighting, HVAC, and spaces themselves.

The instrument and music storage systems are past their useful life and need replacement with new systems that will align with the programs actual instrument and sheet music quantities. Band chairs will be replaced with furniture that is suitable for these programs.

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AQUATIC CENTER AQUATIC CENTER IMPROVEMENTS Pool Boiler and Heat Exchanger Replacements and Add Glycol The High School main swimming pool, wading pool, and spa are currently heated by two (2) hot water boilers and four (4) heat exchangers. The boilers are 2007 vintage Triangle Tube boilers with a capacity of 399,000 BTUs (British Thermal Units) each. The main swimming pool is served by two (2) of the heat exchangers while the wading pool and spa are each served by heat exchangers that have recently been replaced.

The pool boilers and main pool heat exchangers have started to corrode and increase in maintenance. The heat generated from the boilers is transferred to the chlorinated pool water loop via the heat changers. The hot water in the boiler loop currently does not have glycol. Glycol is used in hydronic heating systems to prevent freezing and corrosion in the pipes which can cause damage to the system.

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AQUATIC CENTER Nexus recommends replacing both boilers (Qty 2) and the main pool heat exchangers (Qty 2) with new hot water boilers and heat exchangers. Glycol would also be installed in the new boiler loop system to prevent freezing during the winter months.

Benefits of these replacements would include improved boiler operation, extended heating system life, reduced maintenance, and improved energy efficiency.

AQUATIC CENTER IMPROVEMENTS HS-AC-1 Boiler and Heat Exchanger Replacements and Add Glycol • • • •

Remove existing 2007 pool boilers and main pool heat exchangers Install new hot water boilers and heat exchangers Modify pool water heating piping as required Add glycol to the pool boiler heating loop to prevent freezing • Provide all necessary electrical, controls and general construction work HS-AC-1 Benefits • Upgraded heating system • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved learning/work environment Page | 110

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AQUATIC CENTER AQUATIC CENTER IMPROVEMENTS Replace Inline Supply and Exhaust Fans and Coil Serving the Pool Equipment/Chemical Room There is currenlty a 2005 inline supply fan with a heating coil that provides fresh air to the pool equipment/chemical room. There is also a 2005 sidewall exhaust fan used to remove the pool vapors from the space.

The supply fan and heating coil have started to rust and degrade over time from the exposure to the chlorine that is present in the air.

Nexus recommends replacing the supply fan and heating coil with a new fan and hot water coil. The sidewall exhaust fan will also be replaced and relocated to the roof of the building as it currently stands out on this side of the building.

The new supply and exhaust fans would have a phenolic epoxy with UV coating to protect them from corrosion.

The benefits of this improvement include increased system life expectancy, improved ventilation, increased energy savings, and an improved working environment.

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AQUATIC CENTER AQUATIC CENTER IMPROVEMENTS HS-AC-2 Replace Inline Supply Fan/Coil and Exhaust Fan Serving the Pool Equipment/Chemical Room • Remove existing supply fan, heating coil, and exhaust fan • Provide new supply and exhaust fans with phenolic epoxy and UV coating • Provide new hot water heating coil • Provide all roofing and sealing work as required • Provide DDC controls, sequencing, and programming • Provide all associated general construction and electrical work as required HS-AC-2 Benefits • Upgraded HVAC infrastructure • Increased ventilation for improved indoor air quality • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved learning/work environment

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AQUATIC CENTER AQUATIC CENTER IMPROVEMENTS Replace pool recirculation system including lowering of pump pit and new 8” drain line from pool to surge tank, Replace stainless steel gutter system The pool recirculation system consists of three main drains at the deepest point of the pool, for bottom recirculation and stainless-steel gutter edge for rim flow surface skimming. The main drain line is 4 inch and very undersized for this installation. The main drain line is attached to pump suction and is not in the surge tank and does not have a float valve for proper surge control. This must be replaced with an 8 inch line to the surge tank with a float valve for surge control. The stainless-steel gutter outlet piping is sized properly and does flow to the surge tank.

During inspection of the pool, a leak was discovered that follows the outline of the gutters system near the entry step. A 2-part epoxy was applied to temporarily minimize loss from the leak. Pressure checks were done on all pool lines including three bottom drains, gutter system, and twenty four floor returns.

The return lines held. All other lines held pressure for five minutes with no drop.

The bottom drain cannot be tested without the pool being drained. Missing grout and tiles were seen throughout the pool. It is recommended that the pool and deck be resurfaced.

The recirculation (filter) pump with motor is in fair condition. The pump with motor is in a pump pit but is not low enough for flooded suction. The pool operator has significant priming problems with this set up. The pump pit needs to be lowered to provide flooded suction to the pump.

To maintain the pool, we recommend replacing the main drain sump and main 8” drain piping from pool to surge tank. This would include a float valve in the surge tank. The existing 4” line can be used as a bypass line to drain the pool. The pump pit would be rebuilt.

Core drilling should be done to determine the condition of the soils behind the gutter system.

Because leaks were found that follow the structural line of the gutters we are recommending replacement of the gutter system.

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AQUATIC CENTER AQUATIC CENTER IMPROVEMENTS HS-AC-3 Replace pool recirculation system including lowering of pump pit and new 8” drain line from pool to surge tank, Replace stainless steel gutter system • • • • • •

Remove main drainpipe Install new 8” drain line from pool bottom to surge tank Add float valve in the surge tank Replace sumps Reconstruct sump pit Replace gutter system HS-AC-3 Benefits • • •

Better control of pool water level Improved control of draining of pool Reduction in leaks

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AQUATIC CENTER AQUATIC CENTER IMPROVEMENTS Replace pool filtration with regenerative media filters, new UV disinfection and new chemical feed system for all pools Filtration System: The filter system consists of four horizontal high-rate sand media filters. The National Filters are in poor condition and no longer manufactured and parts for these filters are no longer available. Sand is a poor filter media as sand media removes particulate down to about 20 microns. The filter system is typical for the age of the pool but does not meet today’s aquatic industry standards for pool filtration.

Regenerative media filters are the new standard for pool filtration. Regenerative media filters will remove particulate down to one micron. This is important since the human eye can see down to about 30 microns, so sand media does not filter much finer than the eye can see. One-micron particulate removal is important as some bacteria, such as cryptosporidium, a parasite, are about one micron in size. The other advantage of regenerative media filtration is that they do not require reverse flow backwashing as compared to sand media filtration. Cleaning of regenerative media filtration only requires about 1/50 of the amount of pool water as compared with sand media filtration. Much less water to replace, treat and heat. We recommend replacement of the sand media filtration system with a regenerative media filtration system.

There should be a VFD for the recirculation pump and this would be part of the regenerative media filter system.

The hair/lint strainer would also be replaced with the installation of a regenerative media filter system. The filter system for the wading pool has been replaced, but the spa pool filter system should also be replaced.

Disinfection System: The disinfection system consists of liquid chlorine (sodium hypochlorite). The chlorine is in carboys in the pool mechanical room and dispensed by peristaltic metering pumps. The oxidation process of disinfecting pool water can be enhanced with the addition of ultraviolet light, (UV). UV will greatly reduce the formation of combined chlorine, which has a high limit of .5 PPM. We recommend the addition of UV for all three pools. For control of pH of the pool water muriatic acid is used and dispensed by a peristaltic metering pump.

The disinfection system and pH feed system are controlled by a Becs, System 3, chemical controller. The controller is in fair condition and could be replaced with an updated controller with internet capabilities. The flow cell appears to be in fair condition. We do recommend upgrading to Becs, System 5 chemical controllers.

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CHISAGO LAKES SCHOOL DISTRICT

AQUATIC CENTER AQUATIC CENTER IMPROVEMENTS HS-AC-4 Replace pool filtration with regenerative media filters, new UV disinfection and new chemical feed system for all pools • • • • •

Remove pool and spa sand filters Install new regenerative media filters for pool and spa Install VFD on the recirculation pump Add UV disinfection system to all 3 pools Add internet compatible chemical feed system to all pools HS-AC-4 Benefits • • •

Better control of pool water filtration Improved disinfecting Better control of system

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CHISAGO LAKES SCHOOL DISTRICT

AQUATIC CENTER AQUATIC CENTER IMPROVEMENTS Replace 2005 Pool Air Handling Unit The Chisago Lakes High School pool is currently being ventilated by a 2005 Huntair air handling unit with DX cooling and hot water heating. This air handling unit is still in good shape but should be considered for replacement in ten (10) years.

The new air handling unit would be rated for pool air and would come with code compliant filtration, heating water coils, DX cooling coils, access sections, and supply fans with variable speed drives (VSDs).

The benefits of this HVAC improvement include increased system life expectancy, improved DDC scheduling, improved ventilation, increased energy savings, improved occupant comfort, and an improved learning and working environment.

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CHISAGO LAKES SCHOOL DISTRICT

AQUATIC CENTER VENTILATION SYSTEM IMPROVEMENTS HS-AC-5 Replace 2005 Pool Air Handling Unit • Remove existing air handling unit, piping, and controls • Provide new double wall indoor air handling unit rated for pool air with hot water heating and DX dehumidification • Provide variable speed drives for the supply and relief fans • Provide all roofing and sealing work as required • Provide DDC controls, sequencing, and programming • Provide all associated general construction and electrical work as required HS-AC-5 Benefits • Upgraded HVAC infrastructure • Increased ventilation for improved indoor air quality • Improved temperature control • Improved occupant comfort • Reduced maintenance • Improved learning/work environment

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CHISAGO LAKES SCHOOL DISTRICT

AQUATIC CENTER AQUATIC CENTER IMPROVEMENTS Replace the ceramic tile on the pool and the deck The tiles on the pool and the pool deck are from the original 1985 construction. During the inspection of the pool, missing grout and tiles were seen throughout the pool.

Missing grout on the left hand side of wall of stairs was leaking and could be the cause of loss of water during the power outage. Areas of patching were also on the pool deck itself. We recommend that the pool and deck be resurfaced.

HS-AC-6 Replace the ceramic tile on the pool and the deck • •

Remove and replace the ceramic tile on the pool and deck Core drill 4 samples to review soil conditions

HS-AC-6 Benefits • •

Improved aesthetics Repairs leaking

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CHISAGO LAKES SCHOOL DISTRICT

AQUATIC CENTER AQUATIC CENTER IMPROVEMENTS Clean and paint the ceiling over the pool and wading pool; replace the pool sound system. Add aluminum ductwork to the spa and wading pool. Replace stainless light fixtures. Clean and paint spa area window lintel.

The ceiling in the pool is difficult to clean due to location and height. The sound system is very distorted and needs to be replaced. The ductwork in the spa and wading pool area is blowing directly onto the ceiling preventing good circulation and should be replaced. The stainless steel light fixtures in the pool areas are in very poor condition. The window next to the spa has a rusted lintel that needs to be cleaned and painted.

HS-AC-7 Clean and paint the ceiling over the pool and wading pool; replace pool sound system. Add aluminum ductwork to the spa and wading pool. Replace stainless light fixtures. Clean and paint spa area window lintel.

• • • • • •

Clean ceiling over the pool and wading pool Paint ceiling Replace sound system Replace sock ductwork to the spa and wading pool areas Replace the stainless steel light fixtures Clean and paint the lintel in the window by the spa HS-AC-7 Benefits • • •

Better aesthetics Improved sound Improved air flow

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CHISAGO LAKES SCHOOL DISTRICT

ATHLETIC FIELDS

ATHLETIC IMPROVEMENTS A review was made of the existing athletic fields at the high school campus.

Information was provided by the Athletic Director and the Grounds manager.

The onsite visit coincided with a rainy day so the observation clearly showed the crainage issues with many of the fields.

Site fields were viewed with School and Maintenance staff. Many of the fields have drainage issues that make the areas less playable. Causes issues especially in spring when the school needs them most.

The water fountains near the fields do not function and a cause has not been found through previous investigations. It is unknown for sure where they are connected to.

It is recommended that a new survey is taken of the area before some of the suggested or necessary work is completed. The previous survey was prior to west parking lot and fields and many of the fields around Varsity Softball were built. The survey should include investigating if there is any record of drain tile or old storm sewer between the drive and JV field causing sinkholes. Further discussion should be had of possibly taking soil borings in some of the areas with frequent water issues such as around the baseball fields. They could help guide frequency of drain tile lines in the fields if there are saturated soils present below the surface.

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CHISAGO LAKES SCHOOL DISTRICT

ATHLETIC FIELDS ATHLETIC IMPROVEMENTS HS-AI-1 Stadium lighting upgrades including new LED fixtures on existing poles •

Replace light fixtures on existing poles for the football field to reduce energy use and have better light quality.

HS-AI-2 Track resurfacing •

Resurface only, asphalt replacement is not needed within the next 10 years

HS-AI-3 Install New lighting at Molnar Field • Replace the field lighting at Molnar Field to reduce energy use and have better light quality.

HS-AI-4 Turf Replacement •

Fabric only within the next 10 years.

HS-AI-5 Replace asphalt paths within stadium •

Remove and replace asphalt pavement in the next 8 years.

HS-AI-6 Replace asphalt paths around softball fields, add 3 hose bibs to fields for infield and repair trenching • •

Remove and replace asphalt pavement in the next 8 years.

Add 3 hose bibs to infields off existing line

HS-AI-7 Varsity baseball: address drainage issues with drain tile and top dressing low spots, connect drain tile to storm sewer, repair miscellaneous irrigation problems and reseed • •

Install drain tile and do slight regrading of problem areas in outfield; reseed disturbed spots in the next 3 years Alternatively regrade all of outfield and add drain tile; potentially adjust sections of the outfield fence to follow grading adjustments

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CHISAGO LAKES SCHOOL DISTRICT

ATHLETIC FIELDS HS-AI-8 Varsity baseball: replace existing lighting •

update lighting in the next 3 years

HS-AI-9 JV baseball: address drainage issues with drain tile and top dressing low spots and infield, repair outfield fence, connect drain tile to storm sewer and reseed • • • •

Regrade low areas of outfield and between baselines and dugouts Install draintile system and find structure in area to send the draintile to Address sinkholes west of fence line Remove and replace outfield fence

HS-AI-10 Varsity softball: address drainage issues with drain tile, miscellaneous irrigation repairs, repair outfield fence, and seed • • •

Drain tile in the next 3 years Regrade center of outfield and other low spots in the outfield Remove and replace portion of the outfield fence where a gap exists at the bottom

HS-AI-11 West softball: install new drainage swale east of south field, regrade northwest corner of north field, miscellaneous irrigation repairs, adjust fence and seed • • •

Grade a swale between the two south softball fields to redirect the western flow of surface water that leaves the SW infield saturated at times Regrade a portion of the NW field along the outfield fence to eliminate that wet area. Steepen grade west of fence to keep water further from area and help drain field Remove, raise and replace path west of Varsity Softball or extend swale to provide drainage

HS-AI-12 North practice field: repair irrigation issues, erosion control and earthwork, seed • • •

Spot address low spots or top dress entire north field to fix drainage issues Owner not concerned about wet area behind bleachers that is not always mowable West fields not used very often by school so any work would be low priority. No drainage issues in fields were observed

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CHISAGO LAKES SCHOOL DISTRICT

ATHLETIC FIELDS HS-AI-13 Varsity softball: add lighting •

Add field lighting at the varsity softball field.

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CHISAGO LAKES SCHOOL DISTRICT

ATHLETIC FIELDS

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