Preliminary Energy Analysis

Greater Latrobe School District Preliminary Analysis

April 16, 2021

Creating Perfect Places

Table of Contents 1.

Introduction .......................................................................................................................... 1

2.

Building Energy .................................................................................................................... 1

3.

Savings Potential .................................................................................................................. 6

4.

Facility Improvement Measures (FIMs) – Self Funding ...................................................... 7

5.

Facility Improvement Measures (FIMs) – Capital Intensive ............................................... 8

6.

Facility Improvement Measures (FIMs) Descriptions – Self Funding ................................ 9

7.

Facility Improvement Measures (FIMs) Descriptions – Capital Intensive ....................... 22

8.

Building Utility Use & Costs................................................................................................ 30

Creating Perfect Places

1. Introduction Siemens conducted a preliminary audit of the Senior High School, Junior High School, Mountain View Elementary, and Baggaley Elementary as directed by the facilities department in March of 2021. The audit includes a review of the energy consumption, review of mechanical plans, and a two-day site inspection of existing equipment. The gathered information was used to identify a list of potential Facility Improvement Measurements (FIMs) that would help the district lower energy consumption and upgrade equipment at the end of its useful life.

2. Building Energy With the energy consumption provided, the buildings can be benchmarked to be accurately compared to other buildings with similar function. Benchmarking is the direct comparison of building energy use, costs, or intensities. Benchmarking is a methodology that quantifies building energy utilization and cost, per square foot per year. Benchmark data can be used to compare the characteristics of one building to another. It is a useful industry standard method for quantifying the opportunity for energy conservation in a facility. This analysis is typically conducted during the Investment Grade Audit. Overall reductions can still be tracked using this methodology.

Utility Cost Index (UCI) and Energy Usage Index (EUI) are indications of how efficiently the building performs. They are calculated based on the total cost of energy and the total energy consumed, relative to the area of space served.

Siemens was provided utility data from June 2018 to May 2020. Each of the Elementary Schools has a dedicated natural gas and electricity account. The Senior High School and Junior High School each have a dedicated primary electric account but share a primary natural gas account.

This is a result of a shared heating plant located in the Senior High School. The Junior High School is not sub metered from the primary heating plant. For this reason, the UCI and EUI analysis for the two buildings is combined.

Siemens was made aware of a billing issue with the local natural gas company. A meter usage dispute resulted in a lump sum charge to the district. This charge was not paid and has showed up on the natural gas bill as an account balance for many years. Since the beginning of the data provided there was an approximately $270,000 that was being carried over month to month. In the May 28, 2020 bill a line item labeled “Conversion Adjustments – Cr” credited the account $268,363.07. In September of 2020 the district started to receive natural gas metered usages that were 2-3 times previous years consumption. The most recent bills received were November and December of 2020 that should an average increase of approximately 240%. The following graph represents the historic gas usage for this account.

Page 1 of 35

Creating Perfect Places

8,343

Greater Latrobe Senior HS & Junior HS Natural Gas Usage 9,000 8,000 7,000 4,731

2018

Jul

Aug

Sep

Oct

Nov

2,663

2,450 1,893

1,072 536 1,744

3,556 Jun

272 117 480

1,071

May

210 89

Apr

37 103 203

Mar

1 89 107

0

246 264 762

Feb

1,000

1,755 1,291

Jan

2,000

665

3,000

2,836 1,962 2,151

4,000

2,267 3,942 2,907

5,000 3,370 3,397 2,707

MCF

6,000

2019 2020

Dec

Sometime between the December 28th, 2018 reading and the November 30, 2018 reading the utility bill meter readings changed from “Actual” to “Estimated” without an explanation to why this occurred. Figure 2.1 is a section from the January 2, 2019 natural gas utility bill showing the change. Figure 2.2 is a section from the same bill now identifying “estimated” readings.

Figure 2.1 Senior & Junior HS Primary Gas Account Meter Readings

Page 2 of 35

Creating Perfect Places

Figure 2.2 Senior & Junior HS Primary Gas Account Estimated vs Actual Readings

On the October 23, 2019 bill the reading type continued to show “estimated” meter readings as shown in Figure 2.3. On the November 2019 bill the graph changed to show “Actual” readings as shown in Figure 2.4 even though the reading types were still estimated.

Figure 2.3 Senior & Junior HS Primary Gas Account Estimated vs Actual Readings

Figure 2.4 Senior & Junior HS Primary Gas Account Estimated vs Actual Readings.

Page 3 of 35

Creating Perfect Places

The “reading type” continued to be “estimated” until the June 25th, 2020 bill. This bill also showed a meter number change which likely means the natural gas meter was replaced. This is shown in Figure 2.5. The metered was replaced one month after the approximately $270,000 charge was removed from the account balance.

Figure 1.5 Senior and Junior HS Primary Gas Account Meter Change

Siemens has usage data of the new meter from July 2020 through December 2020. Based on this data Siemens has projected out the usages from January 2021 to June 2021 to compare annual usages.

Table 2.6 Senior and Junior HS Energy Intensity Projection Comparison Electric

Natural Gas

Total

$

$

Use Intensity

EUI ECI (kBtu/Sq.Ft.) ($/Sq.Ft.) March 2019 – February 2020 $302,842 $96,994 $399,836 71.13 $0.97 Projected $302,842 $280,514 $583,356 145.81 $1.42 Increase $183,520 $183,520 74.68 $.45 *Based on 411,188 combined sq.ft. **Projected assumes rates remain constant Account

$

It is not definitive currently if either of the consumption data is an accurate representation of how the buildings use energy. The period between March 2019 – February 2020 appears to show a lower than anticipated value and the projected case shows a significantly high usage.

Siemens recommends investigating this further during an Investment Grade Audit.

Page 4 of 35

Creating Perfect Places

The data shown in Table 2.7 provides the Utility Cost Index ($/ft2) and the Energy Usage Index (BTU/ft2) for each of the Elementary school accounts based on utility data provided from March 2019 to February 2020.

Table 2.7 Energy Intensities Total

Total

Use Intensity

Account

Sq.Ft.

$

EUI (kBtu/Sq.Ft.)

ECI ($/Sq.Ft.)

Baggaley Elementary Mountain View Elementary TOTAL

98,728 99,031 197,759

$92,018 $91,077 $183,095

57.75 61.83 59.79

$0.93 $0.92 $.93

To better understand how efficiently Greater Latrobe SD is currently operating, Siemens uses the U.S. EIA CBECS benchmarking dataset to rate the building’s energy use relative to other buildings of similar size, use and climate. Energy performance in different building types is contained in the Energy Information Agency’s (U.S. Department of Energy) Commercial Buildings Energy Consumption Survey (CBECS). CBECS is a statistical survey of building features, uses, energy consumption, and expenditures in U.S. non-residential buildings.

Table 2.8 CBECS Overall EUI’s Building Type Education

EUI 68.8

Page 5 of 35

Creating Perfect Places

3. Savings Potential The Senior and Junior High School primary gas meter was replaced in June of 2020. Based on the data received through December of 2020, consumption has increased by approximately 250%. The schools now exhibit almost double the industry average for education. Prior to the meter being replaced the Senior and Junior High School exhibited lower than anticipated energy consumption based on age of equipment in the buildings. Siemens recommends a full assessment of gas usage during an IGA to determine an accurate baseline usage.

The Elementary Schools have a low EUI but there is still potential for energy savings. With the age of the HVAC equipment in the building lower EUIs could represent equipment not operating to design conditions. In some instances, it can be a sign of improper ventilation air. This can be further evaluated during an Investment grade audit.

Although this date needs to be investigated further for accuracy, based on the findings from the preliminary survey there is a significant opportunity to save energy at these buildings. A comprehensive project typically saves approximately 20%-25%. Prior to the gas meter being replaced this would have represented approximately $115,000 to $145,000 in annual energy savings depending on the final selection of FIMs. With the projected baseline after the gas meter replacement, this would represent approximately $155,000 to $190,000 in annual energy savings. The order of magnitude of the savings would need to be investigated further during an IGA. The energy savings alone can support a project size of approximately $2,000,000 to $3,250,000.

There is a significant amount of HVAC equipment that is at the end of its service life.

Replacement of this equipment will provide additional energy savings, operational savings and capital cost avoidance. These replacements are not cash flow neutral but should be evaluated for inclusion in a comprehensive project. Siemens recommends completing an analysis of equipment life expectancy during the Investment Grade Audit (IGA).

Page 6 of 35

Creating Perfect Places

4. Facility Improvement Measures (FIMs) – Self Funding

FIM Interior LED Lighting Upgrades Retrocommissioning Air Handlers and Rooftop Units Water Conservation Building Envelope Improvements RTU Inlet guide vane to VFD conversion BAS Upgrades; Demand Control Ventilation BAS Upgrades: Single Zone VAV Kitchen Hood VAV Conversion Ice Cold Refrigerant Additive Optimization of refrigeration and freezer applications Computer power and printing optimization VSD for Hot Water Pumping Cooling Tower Fan VFDs Demand Flow Chiller Optimization Pool Optimization

Senior HS

Junior HS

Mountain View ES

Baggaley ES

X

X

X

X

X

X

X

X

X X X

X X X X

X X X X

X X X X

X X

X X

X X

X X

X

X

X

X X

X

X

X X X

Page 7 of 35

Creating Perfect Places

5. Facility Improvement Measures (FIMs) – Capital Intensive

FIM Enlighted IOT Platform Transformer Replacements Unit Ventilator Replacement DOAS Unit Vent Conversion for Humidity Control Rooftop Unit Replacement VAV Box Replacement

Senior HS

Junior HS

Mountain View ES

Baggaley ES

X X X X X

X X X

X X

X X

X X

X

X

X

X

X

BAS Upgrades: Pneumatic to DDC conversions Boiler Room

X

BAS Upgrades: Pneumatic to DDC conversions Unit Vents

X

BAS Upgrades: Pneumatic to DDC conversions Air Handlers and RTUs

X

BAS Upgrades: End of life replacements Condenser Replacements Gym Air Conditioning Air Cooled Chiller Replacement Domestic Water Heater Replacement Pool Pak Boiler Replacement

X X X X X

X

Page 8 of 35

Creating Perfect Places

6. Facility Improvement Measures (FIMs) Descriptions – Self Funding Interior LED Lighting Upgrades Existing Conditions Senior High School The majority of the school has T8 fluorescent fixtures. The hallway light fixtures are recessed and sit within the ceiling grid system. In many of the halls there are LED spotlights illuminating artwork. Overall, there has been minimal LED conversions. Most classrooms have recessed light fixtures with parabolic lenes. Most spaces do not have occupancy sensors. The library has pendant mounted fixtures with indirect lighting. The gymnasiums have pendent mounted metal halide fixtures. The pool has high wattage metal halides with indirect lighting. The auditorium has a significant amount of can recessed lights install on the high ceilings above the seating area. These lights are difficult to replace and can be a maintenance issue.

-

Page 9 of 35

Creating Perfect Places

Junior High School The lighting at the Junior High School is a mix of T8 fluorescent fixtures and metal halides. The hallway light fixtures are recessed and sit within the ceiling grid system. The kitchen serving area has been converted to LED but overall, there has been minimal LED conversions. Most classrooms have recessed light fixtures with parabolic lenes. Most spaces do not have occupancy sensors. The library has a high recessed metal halide fixtures. There is a large sky light in the center. The gymnasiums have pendent mounted metal halide fixtures. The cafeteria and hallways with high ceilings have recessed metal halide fixtures.

Page 10 of 35

Creating Perfect Places

Mountain View Elementary and Baggaley Elementary The lighting at the Elementary schools is primarily T8 fluorescent fixtures. The hallway light fixtures are recessed and sit within the ceiling grid system. There is a high ceiling area with a stairway at Baggaley where the lights have been converted to LED but overall, there has been minimal LED conversions. Most classrooms have recessed light fixtures with parabolic lens.

Most spaces do not have occupancy sensors. The gymnasium has pendent mounted metal halide fixtures.

Mountain View

Baggaley Elementary

Page 11 of 35

Creating Perfect Places

Proposed Solution The proposed strategy is to replace the fluorescent fixtures with LEDs to maximize energy savings, maintenance savings and system reliability. The lighting upgrade is meant to provide appropriate light levels while taking advantage of the long-life, highly efficient nature of LEDs. The primary recommended retrofit option is Retrofitting with Type B LED lamps.

Classrooms – Replace the existing T8 lamps with Type B LED lamps with integral drivers. Existing dual switching will be maintained.

Hi-Bay Gym lighting - Replace existing Hi-Bay fixture with LED with integral occupancy sensors.

Maintain existing circuiting.

Office Areas – Replace the existing T8 lamps with Type B LED lamps with integral drivers.

Existing dual switching will be maintained.

Auditorium (HS) – Replace existing recessed can lights with LEDs. Pool (HS) – Replace existing indirect metal halide fixtures with new LED fixtures rated for wet locations.

Retrocommissioning Air Handlers and Rooftop Units Existing Conditions Commissioning is typically a process associated with new construction. It’s the method of verifying that building systems are operating as they were designed. For many reasons, over time, buildings can deviate from original design intent. This deviation can cause increase energy consumption for many systems. There are also design strategies developed around energy consumption that were not available at the time of the systems original commissioning process.

Commissioning of existing systems is known as retrocommissioning. There are many air handler systems across the district that are 15+ years old. They are near the end of their useful life and are a key candidate for retrocommissioning or replacement.

Proposed Conditions One of the largest sources of energy consumption in a facilities' HVAC system is at the air handling units. The complexity of operations in these systems varies greatly depending on space

Page 12 of 35

Creating Perfect Places

requirements. There are also many potential points of failure that can cause comfort issues and inefficient operation. Periodic review of system performance will ensure that they are functioning optimally. The retrocommissioning process is a phased approach to identify failures, make adjustments, and implement processes to validate equipment continues to operate as designed.

During an IGA Siemens can conduct a review of the existing air handler systems by using Siemens analytics tools. Siemens analytics uses statistical bins to identify periods of nonperformance that have occurred during typical system operation. The output of the tool therefore not only identifies that you have an issue, but under what operating conditions that issue is regularly occurring. The analysis includes the following tests: • • • • • • • •

Control loop performance analysis Equipment schedule review Cooling and heating coil performance analysis Economizer performance analysis Static pressure control analysis Supply temperature control analysis Outside air damper functionality analysis Diagnosis of simultaneous heating and cooling

Water Conservation Retrofit or replacement of domestic plumbing fixtures with modern, EPA WaterSense labeled, high efficiency fixtures can often result in the largest water savings opportunity within a facility.

Faucet and showerhead retrofits will also yield thermal energy savings due to a reduction in the volume of hot water consumed.

TOILETS: High efficiency toilets (HET) are available in a wide variety of fixture types and configurations. Modern commercial flush-valve UHETs are designed as low as 1.1 gallons per flush (gpf), which is a >30% reduction from their 1.6 gpf low-flow predecessors, and a >60% reduction from older high flow toilets. Tank-type HETs are available from 0.8 to 1.28 gpf; and can utilize pressure vessel or canister flush technologies for improved performance over the traditional flapper assemblies, which helps reduce leaks, clogs, and fixture maintenance.

URINALS: High efficiency urinals (HEU) are available in a variety of flush rates ranging from 0.125 gpf (pint-flush) up to 0.5 gpf, resulting in as much as a 90% reduction in consumption from typical existing fixtures. Waterless urinals are available that can virtually eliminate urinal water use, but due to extensive maintenance and potentially damaging effect to a facility’s sewer plumbing infrastructure, they are not typically recommended.

Page 13 of 35

Creating Perfect Places

FLUSH VALVES: Although proper fixtures are required to fully achieve water consumption savings and the desired performance of HE fixtures, savings is achieved at the flush valve.

Siemens recommends installing I-CON Cobalt valves in replacement of existing valves. I-CON Cobalt valves offer several benefits: -

-

-

-

-

I-CON valves utilize a piston style T-seal cartridge technology that has wider range of functional operating pressures, minimizing performance issues during pressure spikes or drops that occur during normal facility operation.

In addition to the wider operating pressure allowance, the allowable flush rate deviation is much better with the I-CON valve using T-seal technology. Most valve manufacturers have a +/-10% allowance, meaning a 1.28 gpf valve is considered properly functioning in a range of 1.15 to 1.4 gpf. The ICON Cobalt valve carries only a -10% flush deviation allowance, which means the maximum flush volume of the valve is what it is designed for. Diaphragms are substantially less accurate and near ±20% of the designed flush rate.

The T-seal cartridge is made of an ABS resin plastic and therefore will not degrade over time like a diaphragm will (which results in increased flush volumes). As a piston cartridge style, the valve allows for the rapid delivery of water into a fixture, allowing for improved bowl clearing performance at lower flush volumes, including Ultra High Efficiency 1.1 gpf, so long as it is paired with proper UHET fixtures.

Diaphragm confusion is also a factor that favors installation of I-CON valves for a performance-based project. The valve housing of a diaphragm valve can accommodate any flow rate diaphragm insert, so HE diaphragm valves can easily be converted to high flow, and water savings can be eroded with improper maintenance procedures.

Diaphragm valves depend on a tiny pinhole to meter the flow of water.

This pinhole will often corrode or clog, causing flush volumes to increase.

Manufacturers recommend changing diaphragm components regularly to ensure proper performance. I-CON Cobalt valves are virtually maintenance free with a simple O-ring as the only degradable part, resulting in direct material O&M savings.

As an alternative to I-CON valves, traditional piston or diaphragm flush valves may be recommended. Each valve technology has its pros and cons, and the best overall solution is evaluated on a case-by-case basis.

FAUCETS: Faucets can typically be retrofit with high efficiency flow restriction devices (aerated or laminar flow). High efficiency flow restrictors are available in a range of flows from 0.25 gpm up to 1.5 gpm. Faucets incapable of simple retrofit may warrant replacement with a modern threaded faucet in order to achieve reduced flow. It should be noted, commercial deep well kitchen sinks, janitor slop sinks, and others that are primarily used for filling a fixed volume or laboratory process are not candidates for flow restriction.

SHOWERHEADS: High efficiency showerheads are available with a range of flow rates from 1.25 gpm up to 2.0 gpm. It is important to understand that the lowest flow showerhead is not always the best recommendation. Selecting showerheads that provide maximum water efficiency Page 14 of 35

Creating Perfect Places

without sacrificing end-user satisfaction is key. HE showerheads are available in a variety of different configurations including traditional post-mounted, handheld shower wands, and a variety of different institutional wall-mounted or nozzle configurations.

Building Envelope Improvements The building envelope includes all exterior components of a building. Air leakage into the building can cause unwanted drafts and heat loss in a building. Siemens recommends investigating the following items during an Investment Grade Audit.

Caulking •

• • •

Doors, windows and other wall assemblies are installed in rough openings in the shell of the building. Installers often do not properly seal the perimeter of the units in the rough opening prior to installing finish casing and trim.

Installers often do not seal the joints of the finish casing and trim.

Sealing the perimeter casing and trim materials will prevent air infiltration/exfiltration previously flowing through the pathway between the rough opening and the unit.

Surface sealing doors and windows by using interior casings or trim as part of the interior surface air barrier is a cost-effective way to reduce air infiltration and exfiltration.

Door Weather-Stripping •

•

Doors are often installed out of square or out of plum. Installation weaknesses, poor weather-stripping product selection and deterioration of weather-stripping products create air leakage pathways around doorways.

Proper weather-stripping materials and installation practices can provide a durable seal.

Along with energy benefits, improving weather-stripping is often a deferred maintenance item and can have comfort benefits for occupants.

Roof-Wall Intersection Air Sealing • •

The roof-wall intersection is a significant contributor to overall building air leakage losses.

The top of the building is critically important because pressure differentials between the inside and outside are greatest at the top of the building. The roof-wall joint is one of the

Air Leakage/Penetrations • •

Air leakage through the building envelope most often occurs where building envelope elements are connected together. Leakage is typically a result of either improper design or construction, lack of maintenance, or normal degradation over the life of the building.

Penetrations in the building envelope consist mainly of cracks or openings at building connection points, holes, and pipe/mechanical penetrations. These openings in the building envelope need to be sealed to stop significant amounts of air leakage and energy losses. Insulating and sealing penetrations and openings with the appropriate Page 15 of 35

Creating Perfect Places

polyurethane spray foam product and premium urethanized elastomeric sealants will minimize or eliminate these sources of air leakage.

Rooftop unit inlet guide vane to VFD conversion There are several Trane Intellipak rooftop units (RTUs) serving variable air volume (VAV) systems at the Junior High School, Mountain View Elementary, and Baggaley Elementary.

The VAV boxes have a modulating damper that varies the airflow to the space and is installed in the ductwork branches to each zone. When the space temperatures are met, the VAV damper modulates to minimum position, reducing the airflow to the space. The RTUs supply preconditioned air to the VAV boxes. As the VAV boxes close the RTU needs to reduce the amount of air provided. The existing Trane Intellipak units utilize inlet guide vanes to choke the air flow and thus reducing the flow to the VAV boxes. The supply fan on the Trane units is constant speed and uses nearly the same energy consumption as the inlet guide van provides various flow rates to the VAV boxes. Installing a Variable Frequency drive on the supply fan and a pressure sensor in the ductwork will allow for the fan to reduce speed during the part load conditions. A significant amount of fan energy is saved by reducing the fan speed. The RTUs are approximately 23 years old and at the end of the useful life. Replacement should be considered prior to retrofitting units.

BAS Upgrades Demand Control Ventilation Siemens has identified rooftop units and air handling units at each school that can benefit from a Demand Control Ventilation control strategy (DCV). Many spaces have highly variable occupancy levels where it is common to have partial occupancy and after hour use.

Conventional HVAC equipment tends to over-ventilate these types of spaces and can make them more costly to operate than is necessary. DCV is a control strategy that adjusts the amount of outside air based on the number of occupants and the ventilation needs of those occupants.

DCV accomplishes two things; it conserves energy and assures sufficient ventilation. Ventilation is provided based on the needs of the occupants of the space rather than using a fixed minimum air ventilation strategy based on design occupancy, which is more often than not the default operating strategy. With DCV, AHUs that condition spaces with highly variable occupancies modulate the outside air dampers according to space occupancy requirements to afford optimal energy savings. Energy savings are based on reducing outside air loads while still meeting ventilation requirements for normal occupancy when “maximum” loads do not exist and resetting the building unoccupied space temperature set point up in the summer and down in the winter. CO2 sensors are installed on each unit to monitor the return air levels and determine Page 16 of 35

Creating Perfect Places

space occupancy. During periods of infrequent use, the cost of conditioning air is greatly reduced. This appears to be implemented at the Senior High School on several units but there are sensors that are failed. Existing units monitoring CO2 should be recommissioned and have sensors recalibrated or replaced. Covid related protocols should be evaluated during the IGA in correspondence with DCV strategies.

Single Zone VAV Siemens has identified rooftop units and air handling units at each school that can benefit from a single zone VAV control strategy. In these cases, a large zone is being controlled with a single air handler. Typically, the air handler is designed with a constant volume fan and modulates the heating and cooling to maintain space temperature set point. This unit can be converted to a variable air volume (VAV) design by installing a VFD on the supply fan and updating the sequence. In this configuration at full design cooling loads the fan will operate at 100% and the cooling supply air temperature will be constant. As the load decreases the supply air temperature remains constant and the fan modulates down to meet the zone requirements for cooling until the fan reaches 50% speed. As load continues to reduce the fan speed remains at 50% and the supply air temperature resets up to maintain space temperature. As the space transitions from cooling to heating the fan remains at 50% and the supply air temperature continues to rise to maintain space temperature until it reaches maximum supply air temperature set point. At this point the fan will start to ramp up speed to maintain space temperature and the supply air temperature will remain constant.

Kitchen Hood VAV Conversion From the walk-through of school facilities, Siemens observed that the kitchen hoods do not have speed control and currently only operate in on/off capacity. Standard commercial kitchen ventilation systems typically operate at their maximum designed speed and/or volume throughout the duration of the kitchen’s operating hours.

Commercial kitchen ventilation removes the heat and effluent generated by the cooking process from the kitchen space, ensuring the comfort and safety of the cooking staff and preventing cooking odors from spreading beyond the kitchen. Commercial kitchen ventilation is composed of exhaust hoods suspended above the cooking appliances, ducting and fans necessary to expel the heat and effluent outside. To replace the air lost through this process, makeup air must be provided by the building’s HVAC system or a makeup air system dedicated to the kitchen, which is composed of its own fans, ducts and potentially heating or cooling, depending on the climate.

Page 17 of 35

Creating Perfect Places

Demand Control Kitchen Ventilation (DCKV) provides control over the ventilation system by modulating the speed depending on cooking activity. DCKV provides automatic, continuous control over fan speed in response to temperature, optical or infrared (IR) sensors that monitor cooking activity or direct communication with cooking appliances.

DCKV systems save energy compared to non-DCKV systems as cooking equipment is not used all at once nor all the time. Thus, the amount of savings due to the reduction in fan speed is dependent on two factors: •

•

The number of appliances used at once: commercial kitchen ventilation systems are designed for the maximum load of the appliances under each hood for safety and comfort.

Since all appliances are unlikely to operate at once, the ventilation system is operating at a higher capacity than necessary.

The time that appliances are used: even if all the appliances under a particular hood are used at once, they will not be used the entire time the kitchen is operating.

Continuous monitoring is one additional benefit of some DCKV systems in that their controllers are network connected, allowing outside parties to monitor the system’s operation. This ensures correct installation and can help prevent degradation of performance over time. Siemens recommends adding variable frequency drives, sensors, and a system controller to the equipment at each of schools.

Ice Cold Refrigerant Additive IceCOLD® is a synthetic solution which is added to HVAC or refrigeration system’s refrigerant. The system will ultimately run less, because the HVAC unit reaches the thermostat set point faster and maintains the temperature more efficiently. This can extend the air conditioning system’s life and reduce maintenance. The actual savings mechanism is not only the reduction of amperes that the compressor’s electric motor uses while running, but the fact that with the removal of the oil fouling, there is a more efficient refrigerant absorption rate, lubricity increases which makes the system more efficient; causing colder supply air (or faster chiller water cool down) resulting in the equipment running 10% to 20+% less on average. Siemens recommends investigating further during the Investment Grade Audit.

Optimization of refrigeration and freezer applications There are walk-in refrigerators and freezers at each school in the district. The refrigeration in Walkin coolers and freezers consumes energy in a few ways. Each walk-in typically has a separate evaporator in the walk-in with a fan(s) and a condenser typically installed on the roof. Fan energy is being consumed at the evaporate and compressor energy for the refrigeration cycle at the condenser.

•

The replacement of shaded pole or permanent split evaporator fan motors with electronically commutated (EC) motors achieves savings by reducing evaporator fan power and through interactive effects with the system’s compressor. These high efficiency (EC) motors introduce less waste heat into the refrigerated case, reducing the total cooling load.

Page 18 of 35

Creating Perfect Places

•

The replacement of existing damaged or missing strip curtains prevents air infiltration during periods when the main door is open for routine stocking activity. When damaged or missing, the warmer, more humid air present in the space will infiltrate the unit, increasing the load of the refrigeration system and often reducing the efficiency of the evaporator unit as frost accumulates, impairing its effectiveness.

•

The replacement of damaged and/or missing door gaskets prevents air infiltration during periods when the main door is closed. When damaged and/or missing, the warmer, more humid air present in the space will infiltrate the refrigerated case increasing the demands on the electrical energy consumed by the refrigeration system and often reducing the efficiency of the evaporator unit as frost accumulates impairing its effectiveness.

•

The installation of evaporator fan controls allows for modulation of evaporator fans, reducing fan speed or turning them off when the compressor is not running. Evaporator fans that are not equipped with controls operate at constant speed continuously, even when there is no call for refrigeration and the compressor is idle. Reduction in energy consumption results from reduced run time of the evaporator fans as well as reduction in waste heat due to fan operation that must be rejected by the system.

Computer power and printing optimization Computers consume power throughout the district. By utilizing power management software, we can drive down overall power usage. In addition, software can also be used to optimize printing actives. Lowering overall toner and Ink consumption. Computer power management and printing optimization is typically an opportunity in the K-12 environment. During the preliminary survey Siemens did not meet with IT staff to gather required information to better qualify the opportunity.

Siemens recommends investigating the opportunity further during the IGA. Variable speed hot water pumping The hot water plant, located in the basement level of the High School, supplies hot water for heating to both the Senior High School and Junior High School. Pumps 3 & 4 supply hot water to the Junior High School and pumps 14 & 15 supply hot water to the Senior High School. Pumps 14 & 15 currently have variable speed drives that allow the pumps to slow down during part load conditions. Pumps 3 & 4 are constant volume. Siemens recommends investigating further the opportunity of installing variable speed drives on pumps 3 and 4. This would save significant amount of energy during part load conditions.

Page 19 of 35

Creating Perfect Places

Cooling Tower Fan VFDs The Senior High School has two approximately 350-ton chillers that supply chilled water to the building. The chillers have two cooling towers that supply condenser water to them. Cooling tower controls are usually set so that 85°F tower water is produced. When ambient conditions are appropriate, the controls can be reset to produce water that is cooler than 85°F. Depending on chiller type and operating conditions, it may be possible to reset the water temperature leaving the tower downward by as much as 30°F (i.e., to 55°F).

Resetting the water temperature leaving the tower is most effectively accomplished by applying a variable frequency drive to the cooling tower fan. Retrofit of cooling tower fans from single speed or two-speed motors to a VFD reduces cooling tower fan energy consumption and provides better control of the condenser return water temperature that increases chiller efficiency.

Demand Flow Chiller Optimization Siemens Demand Flow™ is our patented and proven chilled water plant optimization technology that produces 20% to 50% energy savings off the total plant energy. It’s a comprehensive strategy that optimizes all energy consuming components of the chilled water system, holistically, and does not sacrifice comfort for energy savings.

The improvements are delivered through specialized algorithms in the building automation systems that are independent of load, simplify system operation and reduce equipment run-time.

Siemens recommends evaluating the opportunity at the Senior High School chilled water plant during the IGA.

Page 20 of 35

Creating Perfect Places

Pool Optimization The Senior High School contains a competition pool in the natatorium. This pool is operated year-round and is heated. Siemens was notified that the chemical treatment system was upgraded recently but no further information was provided. Siemens recommends investigating the following options further during the IGA. During the IGA, Siemens recommends evaluating the following pool upgrades.

• • •

Liquid pool cover system On-site pool chemical generation Smart pool pump control system

Liquid pool cover system Liquid pool covers work by slowing evaporation from the surface of a swimming pool. When the pool is warmer than the air around it, or when the air has lower than 100% humidity, the pool will lose heat and water to the surrounding environment. Water evaporating from a pool can account for 70% of heat loss. Liquid pool covers slow down evaporation by forming a safe, non-toxic, transparent layer one to two molecules thick on the surface of the pool. The liquid pool cover will be dispensed by an automated metering system with pump & timer. This measure will also have the additional benefit of helping prolong the life of the buildings air handlers and heat exchangers by reducing the amount of chlorine and humidity in the air.

Smart Pool Pump Control System The control system starts with a standard VFD as one of its components, along with an overload block, bypass and output contactors to provide additional protection to the pump motor. The manual bypass in the system will allow the operation of the pump even if the VFD is not operating.

Since the system is specifically designed for this application, it integrates better with the circulation, filtration, heating and chemical systems than a standard VFD. In addition to the energy savings, the addition of VFDs will also reduce stresses on the motors and pumps associated with startup, reducing wear and tear on the attached mechanical components, resulting in reduced maintenance.

On-site Pool Chemical Generation On-site hypochlorite is a dilute form of disinfectant compared to chlorine gas or concentrated commercial hypochlorite. The raw materials required by on-site generators are 75% to 90% cheaper than the annual cost of traditional chlorine and pool chemicals. On-site generation also allows for improved inactivation of microorganisms, increased water quality by reduced disinfection by-products, and reduced threat to public safety. In addition, traditional chlorination methods result in large quantities of by-products and impurities entering into the pool, raising the TDS levels, and thus causing the pool system to add more freshwater to dilute the pool. On-site production of chlorine and injecting that chlorine directly into a pool greatly reduces a pool system’s water loss.

Page 21 of 35

Creating Perfect Places

7. Facility Improvement Measures (FIMs) Descriptions – Capital Intensive There is a significant amount of equipment across the district that is at the end or passed its service life. The previous major upgrade to the districts mechanical systems occurred around 2000. As a result, a significant amount of equipment is 20+ years old. Siemens has identified this equipment as potential capital replacement options. Although there are opportunities to save energy on replacing the equipment, the paybacks are typically long. When units pass their life expectancy, they will show higher frequency of equipment failures, causing equipment down time.

Manufactures may no longer carry replacement parts increasing costs and lead time to make repairs. Older equipment may also operate outside of original design intent. Siemens can better identify the savings during the Investment Grade Audit if Greater Latrobe School District would like to address these upgrades.

Enlighted Lighting Controls In addition to the end-of-life upgrades, Siemens is focused on making our customer’s buildings smarter. Our Enlighted IoT solution delivers a technology platform for smart buildings via the lighting infrastructure. Our sensor technology and scalable network provide real-time data collection and high value applications.

The Enlighted sensors are installed in every suitable light in a building, which includes the vast majority of fluorescent fixtures, and high-bay HID lights. Each sensor can detect light levels, motion, temperature, and can measure energy consumption. Each sensor also has blue tooth capability. With the sensors in every light, we are able to provide the most robust coverage for lighting controls, energy management, track space utilization and real-time asset location, as well as possible safety and security applications. The data from the sensors is collected wirelessly and the analysis is provided via a web-based portal, which provides you with a lower cost way to access and use the data.

Enlighted sensors provide the simplest and most advanced way of automating and managing a building’s lighting infrastructure. Owners of buildings benefit from substantial energy savings while occupants enjoy unprecedented control and comfort.

The advanced lighting controls allow our customer to enhance the energy savings obtained by switching from fluorescent to LED lights by adding the following capabilities to the lighting control system.

• Task Tuning/High-end trimming • Daylight harvesting • Occupancy/Vacancy detection • Auto and advanced demand response programs • Time-of-Day dimming schedule • Real-time energy savings reports

Page 22 of 35

Creating Perfect Places

Enlighted IOT Platform As mentioned, our IoT platform goes far beyond lighting controls. The data collected can be used for a variety of purposes. Enlighted has developed two specific applications to analyze and use the data as described below. In addition to these applications, the data can be shared with other software developers for mapping, security and other applications.

Our Space Application provides a way to collect data on occupancy and utilization rates in buildings. The data can be used to measure occupancy rates, identify traffic patterns, and monitor building level metrics.

Motion Trail Map

Occupancy Density Map

Dashboard for Space Utilization

Some of the more exciting uses of the system lie in the area of asset management and security.

The Where Application combines the blue tooth technology embedded in each sensor/fixture with blue tooth enabled tags and badges to provide real time location services for both assets and people. This application has many advantages such as tracking visitors and personnel, helping with time management for the location of shared equipment, and providing geo-fencing capabilities that can provide alerts if equipment or people move out of or in to a certain area.

The density of the sensors ensures that people and equipment will not get lost due to poor reception or low density coverage of scattered expensive sensors.

Page 23 of 35

Creating Perfect Places

Real-time Live Motion Views On Map

Locate People & Equipment

Visitor Monitoring

Asset Utilization and Management

In addition to using data to power the Space and the Where applications, the system can export data for use in third party applications. We realize that our customers may be find uses for the data to either work with a third-party application provider, or possibly develop their own applications. We have an API guidebook available and we are excited to work with you to see what ideas or uses you might identify as we move through the development of the project.

We will work with you to identify areas that may provide additional savings or value to the district to improve the payback and cost/benefit analysis of the system.

Transformer Replacements The primary goal of this ECM is increased energy savings through replacement of old, inefficient transformers with new, ultra-high efficient transformers. While facilities can be unique, electrical infrastructure is almost always based on U.S. industry standard transformers.

Transformers are typically purchased as part of a total electrical distribution package. Most of these transformers are operating at a small fraction of their nameplate capacity, resulting in very low efficiency, and are producing large amounts of excess heat, resulting in energy losses and higher utility costs. In addition, half of all existing transformers, according to the Dept. of Energy, are approaching a mean time to failure of 32 years. Replacing these units prior to a sudden end of life, results in lower risk of facility down time. In certain circumstances the transformer upgrades can be supported within a budget neutral project. Siemens recommends completing a full assessment of the transformers across the district during the IGA.

Page 24 of 35

Creating Perfect Places

Unit Ventilator Replacements Unit ventilators provide heating, cooling, and ventilation air to most of the exterior areas of the Senior High School and some parts of the Junior High School. According to ASHRAE, an organization that sets standards for HVAC Equipment, life expectancy of unit ventilator’s is 20 years. The unit ventilators at the district are 20+ years old. When unit’s pass their life expectancy, they will show higher frequency of equipment failures, causing comfort issues and down time. Unit ventilator manufactures may no longer carry replacement parts increasing costs and lead time to make repairs. Older equipment may also operate outside of original design intent. This can lead to improper dehumidification, inconsistent space temperatures, and insufficient ventilation air. There are also additional operational costs associated with repairing units. Each unit ventilator is in the conditioned space. This means the space must be unoccupied to diagnose the problem and make repairs. In most cases this results in afterhours repairs or delayed repairs scheduled during school vacations. Diagnosing the temperature complaints takes time. Siemens recommends assessing replacing the unit ventilators and condensers that are at the end of their useful life. New units will allow for better control of space temperatures and humidity levels.

DOAS Unit ventilator Conversion At the Senior High School, the predominant classroom HVAC equipment is unit ventilators. The unit ventilators are at the end of their useful life. Typically, unit ventilators have limited ability to control humidity in the space. When replacing the unit ventilators Siemens recommends reviewing the feasibility of a Dedicated Outdoor Air System (DOAS) to provide ventilation to the classroom blocks. A DOAS would typically be a rooftop unit that includes heat recovery and can provide better humidity control of ventilation air. The outdoor air to the existing unit ventilators is blocked off and the DOAS system is ducted into each classroom providing the required ventilation air. The ventilators could be refurbished by replacing the valve, disabling the OA damper, upgrading the controls, and cleaning the coil. This would-be a lower cost than replacing the unit entirely. The second option would be replacing the unit ventilator with a fan coil. This would require additional case work to fit properly. The last option would be installing Page 25 of 35

Creating Perfect Places

a new unit ventilator and disabling the outdoor air. Typically, the unit ventilator is more expensive option than a fan coil but may require less case work.

Rooftop Unit Replacements There are several Trane Intellipak rooftop units (RTUs) serving variable air volume (VAV) systems at the Junior High School, Mountain View Elementary, and Baggaley Elementary. The RTUs are approximately 23 years old. According to ASHRAE, an organization that sets standards for HVAC Equipment, life expectancy of roof-top air conditioners is 15 years. Replacement should be considered prior to retrofitting units. There will be an increase in energy savings from both the fan energy and air conditioning.

Variable Air Volume Box Replacement The Trane rooftop units (RTUs) serve variable air volume (VAV) systems at the Junior High School, Mountain View Elementary, and Baggaley Elementary.

The VAV boxes have a modulating damper that varies the airflow to the space and is installed in the ductwork branches to each zone. When the space temperatures are met, the VAV damper modulates to minimum position, reducing the airflow to the space.

The RTUs supply preconditioned air to the VAV boxes.

As the VAV boxes close the RTU needs to reduce the amount of air provided. The VAV boxes were installed around the same time the rooftop units were replaced.

Approximately 23 years ago and at the end of the useful life. Life expectancy of VAV boxes is 15 years and replacement should be considered.

Page 26 of 35

Creating Perfect Places

BAS Upgrades: Pneumatic to DDC conversions The majority of HVAC equipment across the district is tied into the existing controls front end.

Although the data is being transferred through an electronic signal there still is a lot of equipment using pneumatics to control the end devices. There are devices called transducers that are converting the air signal to a digital signal to be recognized by the control system.

Replacement of existing pneumatic controls with Direct Digital Control (DDC) will improve the effectiveness of the control strategies, improve the efficiency of the control and management and reduce energy usage. DDC is a pre-requisite for many advanced energy management control strategies.

DDC provides more effective control of HVAC systems by providing the potential for more accurate data from electronic sensors. Although the existing control system is receiving feedback via the transducers, the accuracy of the control is unknown. Siemens recommends upgrading pneumatics in the following areas: Boiler rooms, unit ventilators, Rooftop units, and air handlers.

BAS Upgrades: End of life replacements Most controls throughout the district are JCI Metasys. There is an integration package the district is using to view all the Metasys panels through the Niagara web-based platform.

O.Z. Enterprises, Inc. is the company that services the Niagara system and the existing JCI end devices. Existing JCI panel age is unknown but appears to have been installed near the previous HVAC upgrades in 2000. These panels may be near the end of their useful life and should be looked at upgrading during an IGA.

Page 27 of 35

Creating Perfect Places

Condenser Replacement There are a few RTUs on the roof of the Senior High School that have a split condenser serving DX coils in the RTUs. The condensers are 22-23 years old and past the end of their useful life. Life expectancy of air-cooled condensers is 20 years and replacement should be considered.

Replacement should be considered with the upgrade of the Rooftop Unit.

Gym Air Conditioning The existing Junior High School gym air handler is heating only. The rest of the gymnasiums on the campus have cooling. The district expressed an interest in upgrading the system to include air conditioning. If adding air conditioning to the gym would include other HVAC upgrades, a centralized air conditioning system should be considered. If adding air conditioning occurs with the current system design remaining, Siemens recommends installing a packed RTU to serve the air conditioning to the space. Considerations need to be taken for available load on the existing electrical system. Air conditioning upgrades may require additional electric gear upgrades.

Air Cooled Chiller Replacement Mountain View Elementary has an existing Trane air cooled chiller that supplies chilled water to unit ventilators. The air-cooled chiller is 22 years old with a life expectancy of 20 years. Siemens recommends evaluating replacement during the IGA. Newer chillers are significantly more efficient and should provide additional energy savings.

Page 28 of 35

Creating Perfect Places

Domestic Hot Water Heater Replacement The senior high school has a domestic hot water heater located in the main boiler plant that supplies domestic hot water to a 700gallon storage tank. The storage tank was relined last summer. The domestic hot water heater appears to be near the end of its useful life. Siemen recommends investigating replacing with high efficiency condenser boilers.

Pool Pak Boiler Replacement Lower-level mechanical room houses a HB Smith boiler that heats water for the Pool packaged rooftop units. The exterior of the boiler is rusted. Age of the boiler is unknow but should be evaluated for replacements during the IGA.

Page 29 of 35

Creating Perfect Places

8. Building Utility Use & Costs The assessment performed by Siemens for this audit included a detailed analysis of all utility cost and consumption data provided by Greater Latrobe School District (GLSD). The analysis was for the Senior High School, Junior High School, Baggaley Elementary, and Mountaintop Elementary.

Siemens was provided electric and natural gas delivery data from June 2018 to May 2020. Not all gas supplier bills were available. Siemens estimated these costs where data was not available.

Water and Sewer was provided for calendar year 2019. For the electric and natural gas accounts Siemens utilized March 2019-February 2020 utility data to define the baseline. This was the most recent data prior to any adjustments made for Covid. Water/Sewer accounts Siemens utilized 2019 calendar year which was the data available at the time of the preliminary report.

The utility accounts analyzed are: • • •

Senior High School & Junior High School – West Penn Electric (Electric Delivery), Direct Energy (Electric & Natural Gas Supply), Peoples Gas (Natural Gas Delivery), Latrobe Municipal Authority (Water/Sewer) Baggaley Elementary – West Penn Electric (Electric Delivery), Direct Energy (Electric & Natural Gas Supply), Peoples Gas (Natural Gas Delivery), Youngstown Borough Municipal Authority Mountain View Elementary - West Penn Electric (Electric Delivery), Direct Energy (Electric & Natural Gas Supply), Peoples Gas (Natural Gas Delivery), Municipal Authority of Westmoreland County

The following account numbers were analyzed for each utility provider:

Table 8.1 Annual Utility Usage Data Electric

Natural Gas

Location

Delivery

Supply

Delivery

Supply

Senior High School Junior High School Baggaley Elementary Mountain View Elementary

100 094 120 134 100 094 120 662 100 094 145 644

431746-9093 431746-9093 431746-9095

200004053175 200004053175 200004053043

431746-9093 431746-9093 431746-9095

100 094 141 114

431746-9094

200004052987

431746-9094

Table 8.2 Annual Utility Usage Data

Location

Water

Sewer

Senior High School Junior High School Baggaley Elementary Mountain View Elementary

M0123010-0 M0123020-0 03.05550.00 G-310-117-50

4-0 5-0 2029-0 5268-0

Page 30 of 35

Creating Perfect Places

Summary of Annual Consumption

Table 8.3 Annual Utility Usage Data Electric

Natural Gas

Water / Sewer

kWh

MCF

gallons

March 2019-February 2020

5,872,067

20,425

4,881,000

**Projected

5,872,067

44,661

4,881,000

Annual Period

*Total for Senior HS, Junior HS, Baggaley ES, Mountain View ES **Projected based on new natural gas meter

Table 8.4 Annual Utility Cost Data Electric

Natural Gas

Water/Sewer

Total

$

$

$

$

March 2019-February 2020

$447,116

$135,815

$100,731

$683,662

Projected

$447,116

$319,336

$100,731

$867,183

Annual Period

*Total for Senior HS, Junior HS, Baggaley ES, Mountain View ES **Projected based on new natural gas meter and no utility rate increases

Table 8.5 Building Data Buildings Senior High School Junior High School Baggaley Elementary Mountain View Elementary Total

Square Footage 248,700 162,488 98,728 99,031 608,947

Page 31 of 35

Creating Perfect Places

Table 8.6 Senior and Junior High School Annual Utility Data March 2019 – February 2020 Electricity

Natural Gas

Total

Month

KWh

$

$/kWh

MCF

$

$/MCF

$

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL

318,993 272,151 348,179 330,417 349,319 318,815 335,766 315,744 435,396 376,258 338,496 338,558 4,078,092

$23,800 $19,746 $26,575 $25,980 $26,056 $23,640 $24,400 $23,918 $31,300 $27,761 $25,541 $24,124 $302,842

$0.075 $0.073 $0.076 $0.079 $0.075 $0.074 $0.073 $0.076 $0.072 $0.074 $0.075 $0.071 $0.074

2,707 2,907 1,962 665 264 89 89 103 117 536 1,893 3,556 14,887

$18,009 $19,326 $11,930 $4,089 $1,668 $576 $576 $700 $784 $3,329 $12,395 $23,613 $96,994

$6.65 $6.65 $6.08 $6.15 $6.33 $6.47 $6.47 $6.78 $6.69 $6.21 $6.55 $6.64 $6.52

$41,809 $39,073 $38,505 $30,069 $27,724 $24,216 $24,976 $24,618 $32,084 $31,089 $37,935 $47,737 $399,836

Table 8.7 Baggaley Elementary Annual Utility Data March 2019 – February 2020 Electricity

Natural Gas

Total

Month

KWh

$

$/kWh

MCF

$

$/MCF

$

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL

68,972 74,453 78,050 80,368 80,886 70,513 76,296 80,763 105,265 88,685 78,008 76,435 958,694

$5,480 $5,845 $6,264 $6,477 $6,194 $5,708 $6,230 $6,514 $8,266 $7,148 $6,140 $6,006 $76,272

$0.079 $0.079 $0.080 $0.081 $0.077 $0.081 $0.082 $0.081 $0.079 $0.081 $0.079 $0.079 $0.080

357 378 555 72 165 14 16 11 20 88 277 409 2,360

$2,439 $2,578 $3,400 $482 $1,047 $136 $144 $116 $170 $581 $1,873 $2,782 $15,747

$6.84 $6.83 $6.12 $6.73 $6.33 $9.51 $9.22 $10.60 $8.53 $6.64 $6.76 $6.81 $6.67

$7,919 $8,423 $9,664 $6,959 $7,241 $5,844 $6,373 $6,630 $8,435 $7,729 $8,013 $8,787 $92,018

Page 32 of 35

Creating Perfect Places

Table 8.8 Mountain View Elementary Annual Utility Data March 2019 – February 2020 Electricity

Natural Gas

Total

Month

KWh

$

$/kWh

MCF

$

$/MCF

$

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL

62,213 69,010 69,354 68,719 69,097 59,129 53,195 65,489 90,485 81,121 75,869 71,600 835,281

$4,997 $5,448 $5,542 $5,513 $7,030 $4,740 $4,294 $5,305 $7,087 $6,424 $5,981 $5,641 $68,003

$0.080 $0.079 $0.080 $0.080 $0.102 $0.080 $0.081 $0.081 $0.078 $0.079 $0.079 $0.079 $0.081

590 644 477 121 38 47 47 5 12 108 435 655 3,178

$4,022 $4,381 $3,354 $1,909 $306 $360 $360 $104 $150 $731 $2,944 $4,454 $23,074

$6.82 $6.80 $7.03 $15.73 $8.05 $7.67 $7.67 $23.07 $12.32 $6.78 $6.77 $6.80 $7.26

$9,018 $9,829 $8,896 $7,421 $7,336 $5,100 $4,654 $5,409 $7,237 $7,156 $8,925 $10,095 $91,077

Table 8.9 Senior High School Water/Sewer Annual Utility Data 2019 Month

Gallons

Fixed Water $

Incremental Water $

Fixed Sewer $

Incremental Sewer $

Total $

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL

190,000 140,000 190,000 270,000 210,000 240,000 160,000 310,000 170,000 240,000 260,000 240,000 2,620,000

$7 $7 $7 $7 $7 $7 $7 $7 $7 $7 $7 $7 $81

$570 $420 $570 $810 $630 $720 $480 $930 $510 $720 $780 $720 $7,860

$1,636 $1,636 $1,636 $1,636 $1,636 $1,636 $1,636 $1,636 $1,636 $1,636 $1,636 $1,636 $19,635

$1,238 $938 $1,258 $2,341 $1,503 $1,623 $1,068 $830 $1,129 $1,877 $2,101 $1,758 $17,663

$3,451 $3,001 $3,471 $4,794 $3,776 $3,986 $3,191 $3,403 $3,282 $4,240 $4,524 $4,121 $45,239

Page 33 of 35

Creating Perfect Places

Table 8.10 Junior High School Water/Sewer Annual Utility Data 2019 Month

Gallons

Fixed Water $

Incremental Water $

Fixed Sewer $

Incremental Sewer $

Total $

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL

89,000 107,000 82,000 117,000 90,000 95,000 44,000 10,000 14,000 69,000 98,000 112,000 927,000

$7 $7 $7 $7 $7 $7 $7 $7 $7 $7 $7 $7 $81

$267 $321 $246 $351 $270 $285 $132 $30 $42 $207 $294 $336 $2,781

$774 $774 $774 $774 $774 $774 $774 $774 $774 $774 $774 $774 $9,282

$605 $728 $558 $976 $612 $647 $299 $68 $95 $469 $692 $901 $6,649

$1,652 $1,829 $1,584 $2,107 $1,662 $1,712 $1,211 $878 $917 $1,456 $1,766 $2,017 $18,793

Table 8.11 Baggaley Elementary Water/Sewer Annual Utility Data 2019 Month

Gallons

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL

78,814 79,819 59,367 74,668 73,896 78,436 75,630 75,381 -42,011 64,073 62,473 160,454 841,000

Fixed Water $

Incremental Water $

Fixed Sewer $

Incremental Sewer $

Total $

$2,773

$595 $595 $595 $595 $595 $595 $595 $595 $595 $595 $595 $595 $7,140

$536 $543 $404 $508 $502 $533 $514 $513 -$286 $436 $425 $1,091 $5,719

$3,903 $1,138 $999 $3,731 $1,097 $1,128 $3,839 $1,108 $309 $2,520 $1,020 $1,686 $22,478

$2,628

$2,730

$1,489

$0

$9,620

Page 34 of 35

Creating Perfect Places

Table 8.12 Mountain View Elementary Water/Sewer Annual Utility Data 2019 Month

Gallons

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL

44,000 39,000 65,000 51,000 52,000 42,000 35,000 4,000 8,000 40,000 60,000 53,000 493,000

Fixed Water $

Incremental Water $

Fixed Sewer $

Incremental Sewer $

Total $

$0

$531 $489 $711 $591 $600 $514 $454 $189 $223 $497 $668 $609 $6,077

$357 $357 $357 $357 $357 $357 $357 $357 $357 $357 $357 $357 $4,284

$301 $265 $615 $405 $420 $286 $238 $27 $54 $272 $540 $435 $3,859

$1,189 $1,111 $1,683 $1,354 $1,377 $1,157 $1,049 $573 $634 $1,126 $1,565 $1,401 $14,220

Page 35 of 35