Revelstoke sewage treatment plant odour control report

City of Revelstoke Council Report

Date: May 15, 2014 File No: 5340-03 SEW 2014-01

To: Mayor and Council

From: Mike Thomas P.Eng. ENV SP

Subject: Sewer Treatment Plant Odour Control

1. ISSUE

Odours from the sewer treatment plant are a nuisance, particularly during the summer months for Southside residents. Council directed staff to proceed with engineering and design work for an odour control solution.

2. RECOMMENDATION

THAT AECOM proceed with detailed design for the Sewer Odour Control Project using carbon adsorption and full ventilation of the inlet works building (Option 1).

AND THAT funds be reallocated from the sewer distribution upgrades & relining capital budget to cover the additional expected construction cost.

3. CAO COMMENTS

Reviewed. GDI.

4. BACKGROUND

4.1. AECOM was selected as the consultant for this project through a two stage procurement process for consultant services.

4.2. AECOM has undertaken a study of the sewer treatment plant, odour issues and available technologies to manage the odour issues.

4.3. The attached report details AECOM’s findings. Stephen Horsman, P.E., P.Eng., from AECOM will be presenting to Council and available for any questions.

5. FINANCIAL IMPLICATIONS

5.1. In 2014, the Sewer Capital Budget included $200,000 for the odour control solution. This estimate was preliminary and subject to change based on the outcome of this stage of the consultant’s investigations.

5.2. The capital cost of the Carbon Adsorption technology is estimated at $300,000.

5.3. It is recommended that Council reallocate sufficient funds from the sewer distribution upgrades & relining capital budget (2014 budget = $150,000) to cover the additional

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expected construction cost, and allow the design phase to proceed for construction in 2014.

5.4. Council will review construction bids and overall budget prior to any construction work proceeding.

6. DISCUSSION

6.1. Two technologies have been recommended for consideration for design and construction, Synthetic Biofiltration and Carbon Adsorption.

6.1.1. Carbon adsorption is a basic chemical engineering operation and is well-established as a gas control technique. The major benefit is flexibility, as it can handle a range of feed rates.

6.1.2. Biofiltration is an effective method of gas control, however, the system effectiveness can be influenced by moisture, air flow rates, microbial regeneration and acidity. Additionally, there can be a start-up time of several hours if the system is not run continuously.

6.2. Two ventilation options were investigated. Ventilating the entire building is considered the best option to ensure there are no fugitive odours from the building space.

6.3. Carbon adsorption with ventilation option 1 has the lowest lifecycle cost estimate for full ventilation. City staff recommends proceeding with detailed design for this option.

7. ATTACHMENTS

• Technical Memorandum – Odour Control Treatment Technology Evaluation – AECOM

• Presentation by Stephen Horsman, P.E., P.Eng., AECOM

8. RECOMMENDATION AND OPTIONS

8.1. Recommendation:

THAT AECOM proceed with detailed design for the Sewer Odour Control Project using carbon adsorption and full ventilation of the inlet works building (Option 1).

AND THAT funds be reallocated from the sewer distribution upgrades & relining capital budget to cover the additional expected construction cost.

8.2. Option 1: Council may select another option as discussed in the attached report, or request further details on any of the information provided.

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AECOM 3292 Production Way, Floor 4 604 444 6400 tel Burnaby, BC, Canada V5A 4R4 604 294 8597 fax www.aecom.com

Technical Memorandum

Revelstoke Technology Evaluation_Revised Rev 3

To Mike Thomas, City of Revelstoke Page 1

CC Stephen Horsman, AECOM

Subject Odour Control Treatment Technology Evaluation - FINAL

From Michael Celli, AECOM Reviewed Rick Bitcon, AECOM

Date June 2, 2014 Project Number 60319807

1. Introduction

The City of Revelstoke (City) has received odour complaints from residents in the Southside neighborhood, neighboring the Wastewater Treatment Plant (WWTP), and therefore intends to construct an odour control system to address these complaints. This purpose of this memorandum is to review treatment technology options and provide a recommendation for consideration by the City to be carried forward for design and construction.

2. Background

The Revelstoke WWTP provides treatment by means of two aerated lagoons, followed by chlorine disinfection of the effluent. Raw wastewater to the plant is pumped from the Downie Pump Station, the Oscar Pump Station, and the Revelstoke Mountain Resort. The forcemains from these pumping stations all discharge to a screening facility, which removes trash from the wastewater before it is sent to the lagoons for treatment. The screening facility is located in a new Headworks Building, which was commissioned in 2009 and includes two screening channels, one of which is currently in service, and a bypass channel. The screening channel in service has a JWC 6 mm finescreen that discharges screenings to a washer compactor and trash bagger inside the screening room.

3. Results of Odour Monitoring

In July of 2013, the City of Revelstoke performed H2S monitoring around areas of the plant to assess the severity of odour emissions from different sources. The results of the 2013 monitoring program are summarized in Table 1.

Memorandum


Table 1 Summary of July 2013 H2S Monitoring Results

Location H2S Concentration (ppm)

Minimum Recorded Maximum Recorded

Screening building under exhaust fan louver (with fan operating)

0.36 13.3

Screening building under exhaust fan louver (fan not operating)

0.001

Lagoon cell 1 in front of screening building exhaust fan louver (with fan operating)

0.001 2.7

Lagoon cell 1 in front of screening building exhaust fan louver (fan not operating)

0.002

Lagoon cell 1 and screening building MH 0.029

Lagoon cell 1 near MH C2 0.001 0.006

Lagoon cell 1 south middle 0.000 0.002

Lagoon cell 1 north middle 0.001

Lagoon cell 2 south middle 0.001

Lagoon cell 2 outflow MH C5 0.000 0.002

Lagoon cell 2 north middle 0.000 0.003

The area in the vicinity of the Headworks Building exhaust fan louver had the highest ambient H2S concentrations of all areas sampled during the monitoring program. Odour emissions from the Headworks Building are the result of H2S forming under anaerobic conditions in the forcemains feeding the WWTP and turbulence through the screening process causing H2S to be released to the airspace, which is ultimately discharged to atmosphere with the building ventilation exhaust. The ambient H2S monitoring results show that concentrations are low around the lagoons, ranging from 0 to 0.002 ppm. In fact, the only area of the lagoon that high H2S was observed was in front of the Headworks Building exhaust fan, where concentrations of up to 2.7 ppm H2S were observed when the fan was running. It is our understanding that O&M Staff manually add chemical to the lagoons periodically to deal with odour issues. Since the initial monitoring program was undertaken in 2013, the City of Revelstoke installed data loggers to monitor H2S concentrations in the exhaust ductwork and the channel headspace of the Headworks Building. Figure 1 and Figure 2 illustrate the locations where the data loggers are installed and Figure 3 and Figure 4 summarize the monitoring results during the sampling period April 2014.

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Figure 1 H2S Datalogger Installed in Channel Headspace

Figure 2 H2S Datalogger Installed in Exhaust Duct

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Revelstoke Technology E

valuation_Revised R

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Figure 3 Sum

mary D

ata Logger Results – Exhaust

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Revelstoke Technology E

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Figure 4 Summ

ary Data Logger R

esults – Channel H

eadspace

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The H2S data collected by the City in April 2014 provided useful information to assess the H2S concentrations present in the Headworks Building. The ambient H2S concentration in the exhaust duct average was measured to be consistently less than 5 ppm with an average of approximately 1 ppm, while the average concentration in the channel headspace was 3 ppm with spikes as high as 25 ppm. Both the 2013 and 2014 H2S monitoring undertaken by the City confirm that the majority of odour emissions at the Sewer Treatment Plan originate from the Headworks Building, and specifically in the inlet channels. Odour emissions from the lagoons due not appear to be a concern or at least are manageable by the manual addition of chemical1. The continuous monitoring data from April 2014 is useful for treatment technology comparisons and as it is expected to represent typical H2S levels in the Headworks Building. For design purposes, a peaking factor will need to be applied to account for potential increases in H2S levels during the warmer summer temperatures. 4. Technology Evaluation

4.1 Technology Screening

Odour control technologies continue to be introduced to the marketplace, and there are many options available for municipal wastewater odour control treatment. Table 2 provides a summary of technologies that have been commercialized and are currently available in the marketplace.

Table 2 Summary of Odour Control Technologies

Technology Description Feasible

Counteractants Masking agents include perfumes and reagents that react with contaminants in the wastewater. Generally, counteractants are only applicable for short-term applications to mask odour emissions during maintenance and upsets. This option is not considered feasible owing to high operating and maintenance costs and low odour treatment efficiency.

-

Liquid Phase Treatment

Oxygenation and

aeration

Ambient air or pure oxygen is added directly to wastewater to oxidize sulphides that are present and to inhibit growth of sulphur-reducing bacteria. This option is not considered feasible owing to technical complexity and high operating and maintenance costs.

-

Chemical oxidation Chemical oxidizing agents are added directly to wastewater to oxidize dissolved H2S to sulfates. This option is not considered feasible owing to high operating and maintenance costs.

-

Sulphur precipitation

with chemical

Metal salts (iron) are added directly to wastewater to form a metal sulfide precipitate with the dissolved H2S. This option is considered technically

1 Based on conversations with the City operations staff and supported by the July 2013 ambient monitoring data

collected by the City.

Memorandum


Technology Description Feasible

and economically feasible and warrants further consideration.

pH stabilization The pH of the waste stream is changed either to inhibit growth of H2S-producing bacteria or to keep H2S in solution as an ionic species (HS- or S2-

). This option is not considered feasible owing to high operating and maintenance costs.

-

Nitrate addition Nitrate is added directly to wastewater and the formation of H2S is reduced by providing alternative metabolic paths to suppress sulphur reducing anaerobic bacteria activity. This option is considered technically and economically feasible and warrants further consideration.

Gas Phase Treatment Wet scrubbers Odorous compounds are removed from the air stream into a chemically

adjusted liquid scrubbing solution. Although this option is technically feasible and has some advantages over other technologies, it is not considered to be economically feasible owing to high chemical and O&M costs.

-

Carbon adsorption Odorous compounds removed by adsorption onto activated carbon. This option is considered technically and economically feasible and warrants further design development.

Biofilters Biological treatment of odorous compounds by passing air stream through media (either organic or synthetic). Removal of odorous compounds is achieved through a combination of absorption, adsorption, and biological oxidation. This option is considered technically and economically feasible and warrants further design development.

Biotowers Biological treatment of odorous compounds by passing air stream through fixed media. Removal of odorous compounds is achieved through a combination of absorption, adsorption, and biological oxidation. This option is generally used as a pre-treatment step to reduce H2S loadings upstream of carbon adsorption or biofiltration. This option does not warrant further consideration.

-

Thermal Oxidation Odour compounds are treated by thermal oxidation. Although this option is technically feasible and has some advantages over other technologies, it is not considered to be economically feasible owing to high O&M costs to purchase fuel.

-

Ionization and

ozonation

Technologies are available that pre-treat make-up air that produce charged ions that “react with” odorous compounds. Others provide systems that charge the air with ozone for treatment. Still, other systems inject ozone into fine water mist that treats odours in unoccupied headspaces. This option is not considered to be feasible owing to a combination of technical and high O&M costs and therefore not worthy of further consideration.

-

Memorandum


Of the technologies presented in Table 2, the following three are considered technically and economically feasible for a year-round odour treatment system for the City’s Headworks Building:

1. Liquid phase chemical addition (sulphur precipitation with chemical or nitrate addition) 2. Carbon adsorption 3. Biofiltation

The following sub-sections provide additional information on the three short-listed technologies and discussion on whether they should be carried forward for further design development.

4.2 Liquid Phase Chemical Addition

The Revelstoke WWTP receives wastewater from pumping stations within the City. Pumping stations and downstream forcemains often provide conditions where sewage can turn anaerobic extended retention times in the absence of oxygen. Under these anaerobic conditions, generation of H2S and other odorous compounds can occur. In order to mitigate this H2S generation, chemical addition systems can be installed at the pumping stations or along the forcemains. The most common types of chemical addition for this purpose include:

Iron salts (e.g. ferrous or ferric chloride) – precipitates and removes dissolved sulphides from wastewater, preventing issues with H2S.

Calcium nitrate solution (e.g. Bioxide or BioMaxx) – prevents sewage from turning anaerobic by provide an electron acceptor (nitrates). This prevents formation of odorous compounds such as H2S.

A photograph of a nitrate chemical dosing system at a pumping station is shown in Figure 5. Nitrate-based chemicals such as Bioxide or BioMaxx have become increasingly popular for chemical based odour control due to their ease of handling requirements, low cost, and effectiveness. Reduced sulphides and H2S are formed from reduction of sulphates (SO4

2-) that are naturally occurring in the wastewater. When nitrates (NO3

-) are present in the wastewater they are preferentially reduced; therefore, formation of reduced sulphides and H2S is prevented by nitrate addition. Implementation of a chemical-based odour control strategy for the City of Revelstoke’s collection system would require odour control systems to be designed for each of the upstream pumping stations. Dissolved sulphide and H2S would need to be measured during high loading periods in the pump station wet-wells and at the forcemain discharges to optimize chemical dosing at each pump station. Generally, the high loading period occurs during dry weather in the early morning when people begin using the sewers after the period of low overnight flows when storage times are longest.

Memorandum


Figure 5 Nitrate Chemical Dosing System

Although technically feasible, AECOM does not recommend chemical addition at the upstream pumping stations as the primary means of controlling odour emissions from the Headworks Building owing to the high operating costs for year-round operation. This approach could be used as a secondary control measure, if necessary to help reduce odour emissions from the Headworks Building when peak H2S loads are experienced in the summer.

4.3 Carbon Adsorption

Carbon adsorption is a well-established and proven technology for municipal wastewater odour control. In an activated carbon odour treatment system, odorous compounds are removed from the air by physical adsorption onto the surface of the activated carbon particles. Figure 6 shows a photograph of an activated carbon adsorption unit and Figure 7 is a schematic diagram of a carbon system.

Memorandum


Figure 6 Activated Carbon Unit

Figure 7 Schematic Diagram of an Activated Carbon System

Carbon units are sized based on the mass loading of hydrogen sulphide and rate of media replacement. Once a unit is installed, it will be able to remove hydrogen sulphide with high efficiency until the media is spent and must be replaced. Carbon systems can be operated remotely with minimal operator attention, except for routine operations and maintenance visits. One of the main limitations of carbon adsorbers is rapid media depletion at high H2S concentrations. Once the capacity of that media is reached, no further treatment is provided and breakthrough of odour emissions occurs. For high H2S loading, frequent carbon media replacement is required, which results in high operating and maintenance costs. Standard carbon media should only be used to treat low levels (less than 2 ppm) of H2S, while impregnated, blended, and catalytic carbon mixtures are economical to treat H2S levels as high as 20 to 30 ppm. Ultimately, the carbon type and mix is selected by the equipment vendor based on the performance specification. Based on the data provided by the City, H2S readings as high as 54.0 ppm have been measured in the Headworks Building; however this occurs only when the HVAC system is not operated. With the HVAC system operating, H2S concentrations generally range between 0.5 to 3.0 ppm. Therefore, it is our expectation that by operating the HVAC system continuously, the H2S concentration at the inlet of

Foul Air

Exhaust Stack

Treated Air to Atmosphere

Carbon Bed

Fan

Mist Eliminator

Dehumidifier

Memorandum


the carbon scrubber could be maintained within the acceptable range for this technology. Continuous operation of the HVAC system can be achieved by variable speed or multi-speed fans operating at high and low speeds, which would result in energy costs similar to the current HVAC configuration. One of the key design considerations for the carbon technology is that high relative humidity greatly reduces the effectiveness of carbon adsorption. Once the media is wet, little odour removal can be expected. To mitigate this risk, a mist eliminator is provided at the inlet to each carbon adsorption unit; however, the mist eliminator only captures large water droplets and grease mists present in the incoming air. Mist eliminators are not effective at reducing relative humidity levels and dehumidifiers are often recommended where relative humidity levels are close to 100%. If this option is selected, the requirement for dehumidification would need to be determined as part of the design process. Dehumidification is usually provided by pre-heating inlet air to reduce relative humidity.

4.4 Biofilter

As an alternative to carbon adsorption, biofiltration is another option for treatment of foul air exhausted from the Headworks Building. Biofiltration provides treatment of foul air by means of physical adsorption, aqueous absorption, and bacterial oxidation of odorous compounds. Typically, a biofilter installation includes a container filled with media (such as soil, compost, or inorganic substrate) to support the growth of bacteria, which metabolize odourous compounds present in the foul air stream. Biofilters are effective at treating many odorous compounds, including H2S and other compounds commonly found at municipal WWTPs. Biofilters are versatile in their design and can be constructed within in-ground basins, or in above-ground units as packaged systems. Biofilters can be either a covered or an uncovered design. The covered designs allow treated air to be discharged to an exhaust stack to provide dilution to further reduce ground level impacts. Figure 8 shows an organic media, uncovered biofilter and Figure 9 shows a covered synthetic media biofilter in a package system. The key limitation of biofilters for this application is the footprint of the unit. Organic media biofilters require a significant footprint and a residence time of 60 seconds for treatment of foul air. Synthetic media biofilters have a reduced footprint, as the required residence time is generally 15 to 30 seconds; however, the footprint is still up to double what would be required for a carbon scrubber.

Memorandum


Figure 8 Organic Media Biofilter

Figure 9 Synthetic Media Biofilter

Memorandum


Organic media biofilters can have significant seasonal limitations due to winterization issues. This type of biofilter must be constantly irrigated, generally using a standard sprinkler system, in order to keep the biomass healthy. The sprinkler system is usually emptied during the winter in order to winterize the equipment and prevent freezing. Therefore, irrigation cannot be provided during the winter. Further, the foul air source is drier in the winter and the biofilter can be prone to drying out during the winter, which will eliminate treatment performance. Synthetic media biofilters address this issue by providing a winterization package and housing the media in an enclosed vessel, allowing for continuous irrigation throughout the winter. Organic media filters generally do not recycle the irrigation water and would require irrigation water to be supplied from City water or possibly recycled effluent. Synthetic biofilters recycle irrigation water and therefore only require water addition for the initial filling and to supplement for water losses during operation. The extent of potable water use for both technologies would need to be confirmed during detailed design. Organic media biofilters can also have issues with compaction of media and channeling, which can lead to short circuiting of flow through the biofilter and less effective treatment. The freezing of the media in the winter, followed by thawing in the spring may cause issues with channeling. In order to resolve issues with channeling and compaction of the media, O&M Staff may need to periodically excavate and re-apply the biofilter media. Plant staff may test for channeling and short circuiting by filling the inlet piping with smoke, and observing the distribution of the smoke rising from the media. Biofilters are also limited in the maximum H2S concentration in the inlet foul air. When H2S inlet loadings are high (> 30 ppm), the pH of the bed may become depressed due to the formation of sulphuric acid as a by-product of microbial H2S metabolization. This can limit the removal of organic reduced sulphur compounds and VOCs ,as these compounds are more readily oxidized at a neutral bed pH. Also, at high H2S loadings (>30 ppm), biofiltration starts to oxide H2S to element sulphur which deposits inside the media, resulting in a high pressure drop through the media bed. All of these problems will lead to poor biofilter performance on odour removal. For these reasons, a biofilter is not recommended for the control of foul air stream with H2S higher than 30 ppm without pre-treatment. As discussed previously in this memorandum, it is expected that the inlet foul air H2S concentration can be maintained within this limitation by optimization of the controls and continuous ventilation of the Headworks Building.

4.5 Options to Carry Forward for Further Consideration

Based on the technology review presented in this section, it is recommended that the City proceed with mechanical foul air extraction from the Headworks Building, and treatment before discharge to atmosphere. It is also recommended that the carbon adsorption (Technology 1) and biofiltration (Technology 2) options be carried forward for further evaluation.

Memorandum


5. Design Flow and Loading

The following sections describe the criteria that will be used to design an odour control system for the Headworks Building. Additionally, two sub-options are developed for the extraction and conveyance of foul air from the Headworks Building to the odour control system. The design information developed in this section is carried forward to Section 6 for evaluation based on lifecycle cost in order to make a recommendation on the preferred odour control system for the City.

5.1 Foul Air Conveyance Options

The Headworks Building has a push-pull type HVAC system, and the room is operated under negative pressure. There is a single supply fan and single exhaust fan, and process air is not separated from the room air with the exception of the separation provided by the checkerplate covering the channels. The HVAC system operates to maintain the H2S concentration within a range that is safe for O&M Staff to enter the room. Table 3 outlines the operating parameters of the HVAC system, and Figure 10 shows the installation of exhaust ducting.

Table 3 Headworks Building HVAC Operation

Parameter Value

Supply fan flow rate 5200 cfm

Exhaust fan flow rate 5500 cfm

Relative pressure Negative

Room volume 400 m3

Air changes 23 AC/hr

Channel headspace volume 40 m3

Air changes including channel headspace 21 AC/hr

Memorandum


Figure 10 Headworks Building Exhaust Air Ducting

As shown in Figure 10, foul air is collected directly from the screen with a flexible hose. The photograph is not clear, and this connection is not shown on the drawings; however, our understanding is that this hose is interconnected with the room exhaust air ducting. There are two options for exhausting and treating foul air from the Headworks Building:

Ventilation 1: Treat all air exhausted from the Headworks Building from the existing HVAC system.

Ventilation 2: Construct ducts to collect process foul air from the channels and screens, and treat this system in a separate foul air treatment system.

Exhaust fan

Screen foul air

collection piping

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5.1.1 Ventilation 1 - Treat Foul Air from the HVAC System

The monitoring program undertaken by the City of Revelstoke found that the area around the Headworks Building exhaust louver had the highest measured H2S concentrations. Further, when the exhaust fan was turned off, the H2S concentrations were much lower and closer to ambient conditions found elsewhere in the plant. Therefore, a simple solution to reduce odours would be to treat air exhausted by the existing building HVAC system. Under this option, the existing room air exhaust fan would be replaced as the existing exhaust fan does not develop enough static pressure to allow air flow through the foul air media. The exhaust ducting would be connected to the foul air treatment system, which would include a fan. The foul air system fan would be operated similar to the existing exhaust fan; however, would be sized to allow air to flow through the treatment system media. The advantage of this option is that it will provide effective treatment of the key foul air source at the plant. Since all air exhausted from the room would be treated, this would be expected to alleviate issues with odour emmissions from the Headworks Building. The key disadvantage of this option is that a large foul air treatment system would be required. The footprint size and capital cost would be higher for this option than Ventilation 2, whereby only process air would be collected and treated. A hybrid approach would be to provide ventilation ducting from both the channel headspace (including equipment) as well as the general room air in the Headworks Building and blend the two streams together upstream of the foul air treatment system. This approach would help reduce H2S levels in the building itself, and ensure that all potentially odourous air is treated.

5.1.2 Ventilation 2 - Treat Air from the Inlet Channel Only

As an alternative to treating all the Headworks Building room air, ducting and sealed covers could be installed to allow only air in the channel headspace to be exhausted for treatment. This would reduce the size and capital cost of the odour control unit. Table 4 outlines the design parameters for this option.

Memorandum


Table 4 Ventilation 2 Design Parameters

Parameter Value

Channel headspace volume 40 m3

Design air changes 20 AC/hr

Flow rate based on 20 AC/hr 500 cfm

Number of screens 2

Total foul air extraction from screens (based on 200 cfm per screen)

400 cfm

Design flow rate 900 cfm

Maximum influent flow rate over past 11 months (based on SCADA trends)

Approx. 100 L/s (212 cfm)

Design peak wet weather flow (based on design drawings)

13,000 m3/d (320 cfm)

As shown in Table 4, a flow rate of 900 cfm would provide 20 AC/hr in the channel headspace, and allow for collection of 200 cfm from each screen. This flow rate is greater than the maximum recorded influent flow rate and the design PWWF, which is an important consideration as this flow rate can displace air from the channel and pressurize the headspace. Therefore, the design flow rate for Ventilation 2 would be 900 cfm, which is lower than the 5500 cfm design flow rate for Ventilation 1. The disadvantage of Ventilation 2 is that there is still risk of odours being exhausted from the Headworks Building by the existing exhaust fan, especially during maintenance events when channel covers are removed. The channel headspace is not the only potential source of odours, as the equipment and screenings bags can also be odour sources. Further, any openings in the channel checkerplate can lead to odorous air being exhausted from the room. Since the existing exhaust fan operates at a high flow rate, providing over 20 AC/hr, there is risk of fugitive odours entering into the HVAC system and being exhausted from the building under this option. To mitigate the risk of odours being released by the room air exhaust fan under this option, an exhaust stack could be installed to disperse room air into the atmosphere. This approach is applied at the Lulu Island WWTP Headworks Building. However, this would require that a new exhaust fan be installed to be able to handle the increased static pressure required to discharge air through a stack. The added capital cost of providing an exhaust stack and larger fan would likely be similar to the capital cost difference between Ventilation 1 and Ventilation 2. Therefore, this hybrid approach would be of marginal benefit and is not recommended.

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5.2 Performance Requirements

The City of Revelstoke has provided AECOM with data recorded from the H2S sensor in the Headworks Building. This data will be used as the basis for sizing the odour control unit. In order to ensure performance in removing other common odorous compounds found in municipal wastewater (e.g. mercaptans, VOCs, amines, aldehydes, etc.), a performance specification will be developed that includes these compounds. The inlet concentrations for these compounds will be inferred based on the H2S concentrations, and AECOM’s experience in similar projects. This performance specification will be further developed during the design phase of the project. Table 5 outlines key performance requirements used to evaluate each odour treatment option.

Table 5 Performance Characteristics

Parameter Value

H2S Concentrations

Peak (Ventilation 1 / Ventilation 2)

Average (Ventilation 1 / Ventilation 2)

3.5 ppm / 25.0 ppm 1.0 ppm / 3.0 ppm

Carbon Adsorption

H2S removal

Other odorous compound removal 99.5% 99.5%

Biofilter performance

H2S removal

Odour removal (odour units)

99% 90%

City of Revelstoke – RFP requirements

H2S at discharge

Mercaptans at discharge

Odour units

Noise

< 0.1 ppm < 0.02 ppm < 500 OU < 35 dbA

The performance data presented in the Table 5 is based on typical performance guarantees offered by equipment vendors. It is our opinion that either technology, activated carbon adsorption or synthetic media biofiltration will be able to meet the performance requirements with respect to removal of odorous compounds. The performance requirements include a minimum mercaptan concentration, and odour units at the discharge of the odour treatment system. There has been no sampling of these compounds, and given the cost to do this sampling (up to $20,000 to measure odour units), it is not recommended to perform this sampling. Instead, inlet concentrations will be inferred to develop a performance specification. As such, it will not be possible to conclusively guarantee performance to meet the City of Revelstoke requirements. However, it is our opinion that the technologies under consideration will provide satisfactory performance for these parameters. In order to meet the RFP requirement for noise (refer to Table 5), the equipment will need to be specified to include an acoustical enclosure. The requirement of 35 dBA may not be possible

Memorandum


immediately adjacent to the equipment, as the fan included in an odour control unit is loud (over 85 dB) and an acoustical enclosure is limited in performance for noise reduction. If the City’s goal is to achieve 35 dBA at the nearest sensitive receptor, this is likely an achievable target. AECOM will work with vendors during the design phase to identify the performance characteristics of acoustical enclosures available in the market.

5.3 Scalability of Treatment

The RFP for the assignment identifies scalability as a consideration for technology selection. Foul air treatment systems, including the media, mechanical piping, and fan, are generally sized to provide treatment at a design air flow rate. Therefore, scalability is not generally built into these systems unless specified when the equipment is purchased. In order to provide scalability, a design future flow rate should be provided to the equipment vendor. As an option, the equipment may be sized for the future flow rate, with the quantity of media initially provided sized for the existing flow rate. As part of design, this option would be evaluated on whether it is more economical than providing a unit sized for the future flows, and initially under-loading the unit. Under this assignment, the odour control equipment must scalable to handle odours from both the existing and future headworks screen. This requirement will be included in the design performance specifications. If the City of Revelstoke has identified foul air sources that may be treated by the odour control unit proposed for this assignment, AECOM can size the equipment so these sources may also be treated in the future. We can confirm this with the City prior to initiating design and developing performance specifications. Another approach to providing scalability with odour control systems is simply to provide enough space to allow additional units to be installed in the future and including tie-in points at key locations. In this way, multiple odour control units may be used to treat the different foul air sources from the treatment plant. Overall, identifying future foul air sources and siting future odour control units is part of the long term planning of a treatment plant, and should be included in a facilities plan. This can ensure that space is available, and equipment is sized to optimize land-use and capital expenditure.

Memorandum


6. Cost Analysis

The following sections provide a cost analysis of carbon adsorption and biofiltration (both organic and synthetic) technologies with each of the foul air extraction options considered in the previous section. The cost estimates are considered Class D and suitable for comparative purposes and are considered accurate within ±50%. More accurate cost estimates will be developed during the design phase of the project. The cost estimates in this section are based on the following assumptions:

Site piping from the headworks building to the facility has not been included as the location of the equipment and pipe routing has not been finalized

Winterization of equipment is not included Acoustical enclosures and noise mitigate measures are not included Cost assumes outdoor installation of all equipment Cost does not include civil costs such as site grading, fencing, access roadways, etc. Electrical costs assume equipment may be powered from an existing electrical room Site wiring costs are not included as wiring lengths are unknown

All of the above assumptions will be addressed during the design phase, and included in subsequent cost estimates, as appropriate. The cost estimates presented in this section are based on budgetary proposals from equipment vendors. The proposals are attached to this memorandum in Appendix B for the City’s reference.

6.1 Technology 1 - Carbon Adsorption

The following sections outline the site footprint and cost to use carbon adsorption technology for each of the ventilation options. Carbon scrubbers are provided by equipment vendors, and the information below is provided by Unisorb. Other vendors such as Purafil, Enduro, and Calgon are expected to have similar equipment, and will be contacted as part of the design phase.

6.1.1 Ventilation 1 – Treat Room Air (5500 cfm)

Table 6 outlines the design criteria and cost for an activated carbon scrubber designed to treat 5500 cfm foul air exhausted from the Headworks Building.

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Table 6 Design Parameters – Treat Room Air and Carbon Adsorption

Parameter Activated Carbon Scrubber


Media volume 4.8 cu.m

Footprint 4.2 x 3.3 m

Capital cost $300,000

Media replacement cost $36,000

Media disposal cost (1) $500

Media replacement frequency 5 years

20 year Lifecycle cost $410,000

Notes: (1) Media disposal cost for activated carbon media is based on refuse tipping fee of $75/tonne Tipping fees are based on the CSRD refuse disposal fee schedule for landfills (scaled sites) Trucking cost of $35/tonne added to the above rate to calculate total disposal cost

6.1.2 Ventilation 2 – Treat Channel Headspace and Equipment Air (900 cfm)

Table 7 outlines the design criteria and cost for an activated carbon scrubber designed to treat 900 cfm foul air exhausted from the headworks channels.

Table 7 Design Parameters – Treat Headspace and Equipment Air and Carbon Adsorption

Parameter Activated Carbon Scrubber


Media volume 0.8 cu. m

Footprint 2.6 m x 1.2 m

Equipment cost (including installation) $105,000

Additional piping cost $50,000

Capital cost $155,000

Media replacement cost $6,000

Media disposal cost (1) $100

Media replacement frequency 1.5 years

20 year Lifecycle cost $230,000

Notes: (1) Media disposal cost for activated carbon media is based on refuse tipping fee of $75/tonne Tipping fees are based on the CSRD refuse disposal fee schedule for landfills (scaled sites) Trucking cost of $35/tonne added to the above rate to calculate total disposal cost

Memorandum


6.2 Technology 2 – Synthetic Media Biofiltration

A synthetic media or organic media biofilter may be applied to treat foul air exhausted from the Headworks Building. The following sections outline the footprint and cost requirements for each biofilter type and each ventilation option considered. Synthetic media biofilters are designed by the equipment vendors, and information included herein is provided by BioRem. The design criteria for the organic media biofilter have been developed by AECOM.

6.2.1 Ventilation 1 – Treat Room Air (5500 cfm)

Table 8 outlines the design criteria and cost for a synthetic and organic media biofilter designed to treat 5500 cfm foul air exhausted from the Headworks Building.

Table 8 Design Parameters – Treat Room Air and Biofiltration

Parameter Synthetic Media Biofilter Organic Media Biofilter

Design flow rate 5500 cfm 5500 cfm

Design residence time 15 s 60 s

Media volume 39 cu. m 156 cu. m

Footprint 10.0 m x 4.0 m 16 m x 10 m

Capital cost $400,000 $350,000

Media replacement cost $43,000 $28,000

Media disposal cost (1) $4,000 $3,800

Media replacement frequency 10 years 5 years

20 year Lifecycle cost $450,000 $450,000

Notes: (1) Media disposal cost for synthetic media is based on refuse tipping fee of $75/tonne Media disposal cost for organic media is based on yard waste tipping fee of $35/tonne Tipping fees are based on the CSRD refuse disposal fee schedule for landfills (scaled sites) Trucking cost of $35/tonne added to the above rates to calculate total disposal cost

6.2.2 Ventilation 2 – Treat Channel Headspace and Equipment Air (900 cfm)

Table 9 outlines the design criteria and cost for a synthetic and organic media biofilter designed to treat 900 cfm foul air exhausted from the headworks channels.

Memorandum


Table 9 Design Parameters – Treat Headspace and Equipment Air and Biofiltration

Parameter Synthetic Media Biofilter Organic Media Biofilter

Design flow rate 900 cfm 900 cfm

Design residence time 15 s 60 s

Media volume 6.4 cu. m 29 cu. m

Footprint 4.9 x 3.1 m 8 m x 6 m

Equipment cost (including installation) $220,000 $135,000

Additional piping cost $50,000 $50,000

Capital cost $270,000 $185,000

Media replacement cost $7,000 $5,000

Media disposal cost (1) $1,200 $700

Media replacement frequency 10 years 4 years

20 year Lifecycle cost $280,000 $210,000

Notes: (1) Media disposal cost for synthetic media is based on refuse tipping fee of $75/tonne Media disposal cost for organic media is based on yard waste tipping fee of $35/tonne Tipping fees are based on the CSRD refuse disposal fee schedule for landfills (scaled sites) Trucking cost of $35/tonne added to the above rates to calculate total disposal cost

6.3 Summary and Recommendation

The analysis presented in this section is summarized and presented in the following three tables:

1. Table 10 outlines the lifecycle cost and footprint for each technology and ventilation option 2. Table 11 provides a summary of the advantages and disadvantages of each technology 3. Table 12 provides a summary of the advantages and disadvantages of each foul air

extraction option

Memorandum


Table 10 Option and Technology Cost Summary

Technology Ventilation Option

Capital Cost Lifecycle Cost Footprint

Technology 1 - Carbon Adsorption

Ventilation 1 $300,000 $410,000 4.2 x 3.3 m

Ventilation 2 $155,000 $230,000 2.6 x 1.2 m

Technology 2 - Synthetic Media Biofilter

Ventilation 1 $400,000 $450,000 10.0 x 4.0 m

Ventilation 2 $270,000 $280,000 4.9 x 3.1 m

Technology 2 - Organic Media Biofilter

Ventilation 1 $350,000 $450,000 16 x 10 m

Ventilation 2 $185,000 $210,000 8 x 6 m

Table 11 Technology Summary

Technology Advantages Disadvantages

Technology 1 - Activated Carbon

Reliable, proven technology Lowest footprint Low capital cost No acclimation of media required Media will provide effective treatment until

spent

Frequent media replacement High cost of media disposal and

replacement (typically none-hazardous waste suitable for landfill)

Technology 2 - Synthetic Media Biofilter

Self-contained package that provides reliable, effective treatment

Performance guarantee includes H2S and odour units (OU)

Lower footprint than organic media biofilter Long media life that often exceeds 10-year

performance guarantee

High capital cost Biofilter requires acclimation

period (1-2 weeks) to provide treatment

Biomass will die-off if foul air flow is stopped for too long, thereby eliminating treatment until re-acclimation

< 30 ppm H2S

Technology 2 - Organic Media Biofilter

Simple, effective technology Low capital cost Low media cost Reasonable media life (3-4 years) Spent media can be composted

Compaction of media can lead to short-circuiting. Even media distribution must be maintained.

Winterization and deactivation of irrigation system can lead to drying-out and loss of treatment during cold season

Residual bark mulch odour is offensive to some people

Biofilter requires acclimation period (1-2 weeks) to provide treatment

Biomass will die-off if foul air flow is stopped for too long, thereby eliminating treatment until re-acclimation

Memorandum


Table 12 Foul Air Extraction Option Summary

Foul Air Extraction Option Advantages Disadvantages

Option 1 – 5500 cfm extraction tied into existing HVAC exhaust ducting

All foul air from the headworks building is collected and treated

Less risk of fugitive odours being released from the headworks building

Higher capital cost Biofiltration options may not be

feasible due to intermittent operation of HVAC system

Larger footprint odour control equipment required

Option 2 – 900 cfm extraction ducted directly to screening channels and equipment

Lower capital cost Smaller footprint odour control

equipment may be provided

Risk of fugitive emissions being released from the headworks building through the existing HVAC system

Re-balancing of the room HVAC system may be required to prevent excessive negative pressure

Additional heating load in building due to continual exhaust of 900 cfm of air from the room

Figures of all of the above options are attached to this memorandum in Appendix A:

Figure 11 Option 1 – 5500 cfm Carbon Scrubber Figure 12 Option 2 – 900 cfm Carbon Scrubber Figure 13 Option 1 – 5500 cfm Synthetic Media Biofilter Figure 14 Option 2 – 900 cfm Synthetic Media Biofilter Figure 15 Option 1 – 5500 cfm Organic Media Biofilter Figure 16 Option 2 – 900 cfm Organic Media Biofilter

Memorandum


7. Recommendations

Based on the analysis presented in this memorandum, carbon adsorption (Technology 1) has the lowest life cycle cost of the short-listed technologies carried forward for further consideration. Notwithstanding, this analysis is based on high level Class D cost estimates and the difference in life cycle costs is on the order of 20 to 30% and within the accuracy of the cost estimate (±50%). We therefore recommend that both carbon adsorption and synthetic media biofiltration technologies be carried forward to the equipment selection stage for the following reasons:

Comparable capital and operating costs Equipment performance is expected to meet the City of Revelstoke’s requirements Equipment may operate and provide performance year round No risk of fugitive odours from the headworks building HVAC system exhaust fan Simple integration with existing HVAC system, with minimal changes required Proven technology Minimal O&M resources required, with the exception of media changes and fan maintenance

We further recommend that the odour control system be designed to provide ventilation from both the channel headspace (including equipment) as well as the general room air in the Headworks Building and blend the two streams together upstream of the foul air treatment system. This ventilation approach is recommended owing to the reduced the risk of fugitive air emissions and safer working environment.


APPENDIX A Conceptual Layouts for Odour Control Treatment Options (Figures 11 – 16)

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APPENDIX B Budgetary Proposals for Carbon Adsorption and Biofiltration Systems

Revelstoke Carbon Scrubbers April 22, 2014

FLD = Furnished by Trane Canada ULC / Installed by

Others

Equipment Proposal Page 1 of 5

Prepared For: Michael Celli, P.Eng.

Date: April 22, 2014 Proposal Number: CT-84431-1

Job Name: Revelstoke Carbon Scrubbers

Engineer: AECOM Engineering

Trane Canada ULC is pleased to provide the enclosed proposal for your review and approval. Tag Data - Unisorb Odour Control Unit (Qty: 1) Item Tag(s) Qty A1 5500 cfm 1

Qty 1 @ 5,500 cfm PBS810-DT-MIST system in stainless steel to provide for removal of 1 PPM H2S loading for a period of 6 years. From the air inlet side the unit includes:

A manual inlet isolation damper and a three-stage stainless steel mist and grease eliminator. The mist eliminator provides 2-micron mist removal to 99.99% efficiency and is removable for cleaning. The mist and grease enclosure includes a drain connection on the bottom, trapping by others. The mist and grease enclosure has two access doors, one on either side to allow for easy removal of the mist and grease pads.

One Dwyer magnahelic differential pressure gauge across the mist and grease housing with an explosion proof switch. Switch is wired to the control panel to provide an indication when the mist and grease pad is dirty.

One spare set of mist and grease pads. The inlet section includes a fresh air purge section complete with motorized damper. This damper is

controlled by an H2S sensor in the media bed housing which, during down times, will open the fresh air intake and energize the fan when the H2S concentration gets too high in the housing.

The air purification section contains 2 separate media beds. The 12” deep first stage contains 85ft3 of caustic impregnated carbon for general organic and H2S removal. The 12” deep second stage contains 85 ft3 of PA8 impregnated alumina spheres for mercaptans and other miscellaneous malodor removal.

One media bed monitor rod installed in the first media bed. The first media bed has two 1-1/2” capped media sample ports and the second media bed has one 1-1/2”

capped media sample port. One media sample thief is provided for media sampling. The system allows for bulk loading of media from the top of the vessel. Hatch access is on top of the unit

through quick release snap acting type, positive pressure latches for immediate access. Media unloading is through 4”ø quick coupling vacuum connections on the side of the unit at low level.

There is one quick coupling connection per media bed. The media housing is insulated with 2” foil face insulation. AMCA rated draw through fan with 10 HP 575/60/3ø TEXP rated motor with scroll casing drain

connection, belt guard and shaft & bearing guard. Trapping by others. The blower and motor assembly is installed using isolation mounts.

An airflow switch is included to indicate when the fan is operating. The fan section is enclosed in an acoustic enclosure A prewired NEMA12 control panel with stop/hand/auto, contact outputs. A yellow epoxy coated steel ladder and hand rail c/w toe kick is included.

Total Net Price (Excluding Sales Tax) ...............................................…………......................$ 196,000

Proposal

J:\JOBS\136\84431\1\Revelstoke Carbon Scrubbers ‐ Proposal April 22‐2014.doc



Others


Tag Data - Unisorb Odour Control Unit (Qty: 1) Item Tag(s) Qty B1 900 cfm 1

Qty 1 @ 900 cfm PBS403-DT-MIST system in stainless steel to provide for removal of 1 PPM H2S loading for a period of 5.9 years. From the air inlet side the unit includes:

A manual isolation damper and three-stage stainless steel mist and grease eliminator. The mist eliminator provides 2-micron mist removal to 99.99% efficiency and is removable for cleaning. The mist and grease enclosure includes a drain connection, trapping by others.

One Dwyer magnahelic differential pressure gauge across the mist and grease housing with an explosion proof switch. Switch is wired to the control panel to provide an indication when the mist and grease pad is dirty.

One spare set of mist and grease pads. The inlet section includes a fresh air purge section complete with motorized damper. This damper is

controlled by an H2S sensor in the media bed housing which, during down times, will open the fresh air intake and energize the fan when the H2S concentration gets too high in the housing.

The air purification section contains 2 separate media beds. The 12” deep first stage contains 13.5 ft3 of caustic impregnated carbon for general organic and H2S removal. The 12” deep second stage contains 13.5 ft3 of PA8 impregnated alumina spheres for mercaptans and other miscellaneous malodor removal.

One media bed monitor rod installed in the first media bed. The first media bed has two 1-1/2” capped media sample ports and the second media bed has one 1-1/2”

capped media sample port. One media sample thief is provided for media sampling. The system allows for bulk loading of media from the top of the vessel. Hatch access is on top of the unit

through quick release snap acting type, positive pressure latches for immediate access. Media unloading is through 4”ø quick coupling vacuum connections on the side of the unit at low level.

There is one quick coupling connection per media bed. The media housing includes a drain connection, trapping by others. The media housing is insulated with 2” foil face insulation. AMCA rated Draw through fan with 2 Hp TEXP rated motor with unit mounted NEMA 7 disconnect switch

and scroll casing drain connection, trapping by others. The blower and motor assembly is installed using isolation mounts.

An airflow switch is included to indicate when the fan is operating. The fan section is enclosed in an acoustic enclosure A prewired NEMA12 control panel with stop/hand/auto and fault alarms.

Total Net Price (Excluding Sales Tax) ...............................................…………......................$ 70,000 Price Includes Freight to site, all taxes extra. Price does not include: Startup, loading of media, fan discharge silencers, handrails or toe kicks (unit height does not require these), warranty labour. Sincerely, Cameron Lowry - Trane Canada ULC 3080 Beta Avenue Burnaby, BC V5G 4K4 Phone: (604) 473-5600 Cell: (778) 227-8802 Fax: (604) 294-9571

This proposal is subject to your acceptance of the attached Trane terms and conditions.



Others


TERMS AND CONDITIONS - EQUIPMENT “Company” shall mean Trane Canada ULC for sales in Canada and Trane U.S. Inc. for sales in the United States. 1. Acceptance. These terms and conditions are an integral part of Company’s offer and form the basis of any agreement (the “Agreement”) resulting from Company’s proposal (the “Proposal”) for the sale of the described equipment and any ancillary services (the “Equipment”). COMPANY’S TERMS AND CONDITIONS ARE SUBJECT TO PERIODIC CHANGE OR AMENDMENT. The Proposal is subject to acceptance in writing by the party to whom this offer is made or an authorized agent (“Customer”) delivered to Company within 30 days from the date of the Proposal. If Customer accepts the Proposal by placing an order, without the addition of any other terms and conditions of sale or any other modification, Customer’s order shall be deemed acceptance of the Proposal subject to Company’s terms and conditions. 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If Company and Customer are unable to agree on such revisions, this Agreement shall be cancelled without any liability. 2. Title and Risk of Loss. All Equipment sales with destinations to Canada or the U.S. shall be made as follows: FOB Company’s U.S. manufacturing facility or warehouse (full freight allowed). Title and risk of loss or damage to Equipment will pass to Customer upon tender of delivery of such to carrier at Company’s U.S. manufacturing facility or warehouse. 3. Pricing and Taxes. Following acceptance without addition of any other terms and condition of sale or any other modification by Customer, the prices stated are firm provided that notification of release for immediate production and shipment is received at Company’s factory not later than 3 months from order acceptance. 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Company shall be obligated to furnish only the Equipment described in the Proposal, and submittal data (if such data is issued in connection with the order), and Company may rely on the acceptance of the Proposal and submittal data as acceptance of the suitability of the Equipment for the particular project or location. If Company and Customer are unable to agree on revised prices or terms, the order may be cancelled without any liability. Unless specifically stated in the Proposal, compliance with any local building codes or other laws or regulations relating to specifications or the location, use or operation of the Equipment is the sole responsibility of Customer. If Equipment is tendered which does not fully comply with the provisions of this Agreement, and Equipment is rejected by Customer, Company will have the right to cure within a reasonable time after notice thereof by substituting a conforming tender whether or not the time for performance has passed. 6. Force Majeure. Company’s duty to perform under this Agreement and the Equipment prices are contingent upon the non-occurrence of an Event of Force Majeure. If the Company shall be unable to carry out any material obligation under this Agreement due to an Event of Force Majeure, this Agreement shall at Company’s election (i) remain in effect but Company’s obligations shall be suspended until the uncontrollable event terminates or (ii) be terminated upon 10 days notice to Customer, in which event Customer shall pay Company for all parts of the Work furnished to the date of termination. An "Event of Force Majeure" shall mean any cause or event beyond the control of Company. Without limiting the foregoing, “Event of Force Majeure” includes: acts of God; acts of terrorism, war or the public enemy; flood; earthquake; tornado; storm; fire; civil disobedience; pandemic insurrections; riots; labor/labour disputes; labor/labour or material shortages; sabotage; restraint by court order or public authority (whether valid or invalid); and action or non-action by or inability to obtain or keep in force the necessary governmental authorizations, permits, licenses, certificates or approvals if not caused by Company; and the requirements of any applicable government in any manner that diverts either the material or the finished product to the direct or indirect benefit of the government. 7. Limited Warranty. Company warrants the Equipment manufactured by Company for a period of the lesser of 12 months from initial start-up or 18 months from date of shipment, whichever is less, against failure due to defects in material and manufacture and that it has the capacities and ratings set forth in Company's catalogs and bulletins ("Warranty"). Equipment manufactured by Company that includes required start-up and sold in North America will not be warranted by Company unless Company performs the Equipment startup. Exclusions from this Warranty include damage or failure arising from: wear and tear; corrosion, erosion, deterioration; modifications made by others to the Equipment; repairs or alterations by a party other than Company that adversely affects the stability or reliability of the Equipment; vandalism; neglect; accident; adverse weather or environmental conditions; abuse or improper use; improper installation; commissioning by a party other than Company; unusual physical or electrical or mechanical stress; operation with any accessory, equipment or part not specifically approved by Company; refrigerant not supplied by Company; and/or lack of proper maintenance as recommended by Company. Company shall not be obligated to pay for the cost of lost refrigerant or lost product. Company's obligations and liabilities under this Warranty are limited to furnishing replacement equipment or parts, at its option, FCA (Incoterms 2000) factory or warehouse (f.o.b. factory or warehouse for US domestic purposes) at Company-designated shipping point, freight-allowed to Company's warranty agent's stock location, for all non-conforming Company-manufactured Equipment (which have been returned by Customer to Company. Returns must have prior written approval by Company and are subject to restocking charge where applicable. Equipment, material and/or parts that are not manufactured by Company are not warranted by Company and have such warranties as may be extended by the respective manufacturer. COMPANY MAKES NO REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, REGARDING PREVENTION OF MOLD/MOULD, FUNGUS, BACTERIA, MICROBIAL GROWTH, OR ANY OTHER CONTAMINATES. No warranty liability whatsoever shall attach to Company until Customer’s complete order has been paid for in full and Company's liability under this Warranty shall be limited to the purchase price of the Equipment shown to be defective. Additional warranty protection is available on an extra-cost basis and must be in writing and agreed to by an authorized signatory of the Company. Additional terms and conditions of warranty coverage are applicable for refrigeration equipment. EXCEPT FOR COMPANY’S WARRANTY EXPRESSLY SET FORTH HEREIN, COMPANY DOES NOT MAKE, AND HEREBY EXPRESSLY DISCLAIMS, ANY WARRANTIES, EXPRESS OR IMPLIED CONCERNING ITS PRODUCTS, EQUIPMENT OR SERVICES, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF DESIGN, MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE, OR OTHERS THAT ARE ALLEGED TO ARISE FROM COURSE OF DEALING OR TRADE.



Others


8. Indemnity. To the fullest extent permitted by law, Company and Customer shall indemnify, defend and hold harmless each other from any and all claims, actions, costs, expenses, damages and liabilities, including reasonable attorneys' fees, resulting from death or bodily injury or damage to real or personal property, to the extent caused by the negligence or misconduct of their respective employees or other authorized agents in connection with their activities within the scope of this Agreement. Neither party shall indemnify the other against claims, damages, expenses or liabilities to the extent attributable to the acts or omissions of the other party. If the parties are both at fault, the obligation to indemnify shall be proportional to their relative fault. The duty to indemnify will continue in full force and effect, notwithstanding the expiration or early termination hereof, with respect to any claims based on facts or conditions that occurred prior to expiration or termination. 9. Insurance. Upon request, Company will furnish evidence of its standard insurance coverage. If Customer has requested to be named as an additional insured under Company’s insurance policy, Company will do so but only subject to Company’s manuscript additional insured endorsement under its primary Commercial General Liability policies. In no event does Company does not waive any rights of subrogation. 10. Customer Breach. Each of the following events or conditions shall constitute a breach by Customer and shall give Company the right, without an election of remedies, to terminate this Agreement, require payment prior to shipping, or suspend performance by delivery of written notice declaring termination, upon which event Customer shall be liable to the Company for all Equipment furnished to date and all damages sustained by Company (including lost profit and overhead): (1) Any failure by Customer to pay amounts when due; or (2) any general assignment by Customer for the benefit of its creditors, or if Customer becomes bankrupt or insolvent or takes the benefit of any statute for bankrupt or insolvent debtors, or makes or proposes to make any proposal or arrangement with creditors, or if any steps are taken for the winding up or other termination of Customer or the liquidation of its assets, or if a trustee, receiver, or similar person is appointed over any of the assets or interests of Customer; (3) Any representation or warranty furnished by Customer in connection with this Agreement is false or misleading in any material respect when made; or (4) Any failure by Customer to perform or comply with any material provision of this Agreement. 11. Limitation of Liability. NOTWITHSTANDING ANYTHING TO THE CONTRARY, IN NO EVENT SHALL COMPANY BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT CONSEQUENTIAL, OR PUNITIVE OR EXEMPLARY DAMAGES (INCLUDING WITHOUT LIMITATION REFRIGERANT LOSS, BUSINESS INTERRUPTION, LOST DATA, LOST REVENUE, LOST PROFITS) EVEN IF A PARTY HAS BEEN ADVISED OF SUCH POSSIBLE DAMAGES OR IF SAME WERE REASONABLY FORESEEABLE AND REGARDLESS OF WHETHER THE CAUSE OF ACTION IS FRAMED IN CONTRACT, NEGLIGENCE, ANY OTHER TORT, WARRANTY, STRICT LIABILITY, OR PRODUCT LIABILITY). In no event will Company’s liability in connection with the provision of products or services or otherwise under this Agreement exceed the entire amount paid to Company by Customer under this Agreement. 12. Nuclear Liability. In the event that the Equipment sold hereunder is to be used in a nuclear facility, Customer will, prior to such use, arrange for insurance or governmental indemnity protecting Company against all liability and hereby releases and agrees to indemnify Company and its suppliers for any nuclear damage, including loss of use, in any manner arising out of a nuclear incident, whether alleged to be due, in whole or in part to the negligence or otherwise of Company or its suppliers. 13. Intellectual Property; Patent Indemnity. Company retains all ownership, license and other rights to all patents, trademarks, copyrights, trade secrets and other intellectual property rights related to the Equipment, and, except for the right to use the Equipment sold, Customer obtains no rights to use any such intellectual property. Company agrees to defend any suit or proceeding brought against Customer so far as such suit or proceeding is solely based upon a claim that the use of the Equipment provided by Company constitutes infringement of any patent of the United States of America, provided Company is promptly notified in writing and given authority, information and assistance for defense of same. Company will, at its option, procure for Customer the right to continue to use said Equipment, or modify it so that it becomes non-infringing, or replace same with non-infringing Equipment, or to remove said Equipment and to refund the purchase price. The foregoing will not be construed to include any Agreement by Company to accept any liability whatsoever in respect to patents for inventions including more than the Equipment furnished hereunder, or in respect of patents for methods and processes to be carried out with the aid of said Equipment. The provision of Equipment by Company does not convey any license, by implication, estoppel, or otherwise, under patent claims covering combinations of said Equipment with other devices or elements. The foregoing states the entire liability of Company with regard to patent infringement. Notwithstanding the provisions of this paragraph, Customer will hold Company harmless against any expense or loss resulting from infringement of patents or trademarks arising from compliance with Customer’s designs or specifications or instructions. 14. Cancellation. Equipment is specially manufactured in response to orders. An order placed with and accepted by Company cannot be delayed, canceled, suspended, or extended except with Company's written consent and upon written terms accepted by Company that will reimburse Company for and indemnify Company against loss and provide Company with a reasonable profit for its materials, time, labor, services, use of facilities and otherwise. Customer will be obligated to accept any Equipment shipped, tendered for delivery or delivered by Company pursuant to the order prior to any agreed delay, cancellation, suspension or extension of the order. Any attempt by Customer to unilaterally revoke, delay or suspend acceptance for any reason whatever after it has agreed to delivery of or accepted any shipment shall constitute a breach of this Agreement. For purposes of this paragraph, acceptance shall be any waiver of inspection, use or possession of Equipment, payment of the invoice, or any indication of exclusive control exercised by Customer. 15. Invoicing and Payment. Equipment shall be invoiced to Customer upon tender of delivery thereof to the carrier. Customer shall pay Company’s invoices within net 30 days of shipment date. Company reserves the right to add to any account outstanding for more than 30 days a service charge equal to the lesser of the maximum allowable legal interest rate or 1.5% of the principal amount due at the end of each month. Customer shall pay all costs (including attorneys’ fees) incurred by Company in attempting to collect amounts due and otherwise enforcing these terms and conditions. If requested, Company will provide appropriate lien waivers upon receipt of payment. Company may at any time decline to ship, make delivery or perform work except upon receipt of cash payment, letter of credit, or security, or upon other terms and conditions satisfactory to Company in accordance with its credit and collections policy. Customer agrees that, unless Customer makes payment in advance, Company will have a purchase money security interest in all Equipment to secure payment in full of all amounts due Company and its order for the Equipment, together with these terms and conditions, form a security agreement (as defined by the UCC in the United States and as defined in the Personal Property Security Act in Canada). Customer shall keep the Equipment free of all taxes and encumbrances, shall not remove the Equipment from its original installation point and shall not assign or transfer any interest in the Equipment until all payments due Company have been made. The purchase money security interest granted herein attaches upon Company’s acceptance of Customer’s order and on receipt of the Equipment described in the accepted Proposal but prior to its installation. The parties have no agreement to postpone the time for attachment unless specifically noted in writing on the accepted order. Customer will have no rights of set off against any amounts, which become payable to Company under this Agreement or otherwise. 16. Claims. Company will consider claims for concealed shortages in shipments or rejections due to failure to conform to an order only if such claims or rejections are made in writing within 15 days of delivery and are accompanied by the packing list and, if applicable, the reasons in detail why the Equipment does not conform to Customer’s order. Upon receiving authorization and shipping instructions from authorized personnel of Company, Customer may return rejected Equipment, transportation charges prepaid, for replacement. Company may charge Customer any costs resulting from the testing, handling, and disposition of any Equipment returned by Customer which are not found by Company to be nonconforming. All Equipment damaged during shipment and all claims relating thereto must be made with the freight carrier in accordance with such carrier’s policies and procedures. Claims for Equipment damaged during shipment are not covered under the warranty provision stated herein.



Others


17. Export Laws. The obligation of Company to supply Equipment under this Agreement is subject to the ability of Company to supply such items consistent with applicable laws and regulations of the United States and other governments. Company reserves the right to refuse to enter into or perform any order, and to cancel any order, under this Agreement if Company in its sole discretion determines that performance of the transaction to which such order relates would violate any such applicable law or regulation. Customer will pay all handling and other similar costs from Company’s factories including the costs of freight, insurance, export clearances, import duties and taxes. Customer will be “exporter of record” with respect to any export from the United States of America and will perform all compliance and logistics functions in connection therewith and will also comply with all applicable laws, rules and regulations. Customer understands that Company and/or the Equipment are subject to laws and regulations of the United States of America which may require licensing or authorization for and/or prohibit export, re-export or diversion of Company’s Equipment to certain countries, and agrees it will not knowingly assist or participate in any such diversion or other violation of applicable United States of America laws and regulations. Customer agrees to hold harmless and indemnify Company for any damages resulting to Customer or Company from a breach of this paragraph by Customer. 18. General. Except as provided below, to the maximum extent provided by law, this Agreement is made and shall be interpreted and enforced in accordance with the laws of the state of New York for Equipment shipped to a U.S. location and the laws of the province to which Equipment is shipped within Canada, without regard to its conflict of law principles that might otherwise call for the application of a different state’s or province’s law, and not including the United Nations Convention on Contracts for the International Sale of Goods. Any action or suit arising out of or related to this Agreement must be commenced within one year after the cause of action has accrued. To the extent the Equipment is being used at a site owned and/or operated by any agency of the Federal Government, determination of any substantive issue of law shall be according to the Federal common law of Government contracts as enunciated and applied by Federal judicial bodies and boards of contract appeals of the Federal Government. This Agreement contains all of the agreements, representations and understandings of the parties and supersedes all previous understandings, commitments or agreements, oral or written, related to the subject matter hereof. This Agreement may not be amended, modified or terminated except by a writing signed by the parties hereto. No documents shall be incorporated herein by reference except to the extent Company is a signatory thereon. If any term or condition of this Agreement is invalid, illegal or incapable of being enforced by any rule of law, all other terms and conditions of this Agreement will nevertheless remain in full force and effect as long as the economic or legal substance of the transaction contemplated hereby is not affected in a manner adverse to any party hereto. Customer may not assign, transfer, or convey this Agreement, or any part hereof, or its right, title or interest herein, without the written consent of the Company. Subject to the foregoing, this Agreement shall be binding upon and inure to the benefit of Customer’s permitted successors and assigns. This Agreement may be executed in several counterparts, each of which when executed shall be deemed to be an original, but all together shall constitute but one and the same Agreement. A fully executed facsimile copy hereof or the several counterparts shall suffice as an original. 19. Equal Employment Opportunity/Affirmative Action Clause. Company is a federal contractor that complies fully with Executive Order 11246, as amended, and the applicable regulations contained in 41 C.F.R. Parts 60-1 through 60-60, 29 U.S.C. Section 793 and the applicable regulations contained in 41 C.F.R. Part 60-741; and 38 U.S.C. Section 4212 and the applicable regulations contained in 41 C.F.R. Part 60-250 Executive Order 13496 and Section 29 CFR 471, appendix A to subpart A, regarding the notice of employee rights in the United States and with Canadian Charter of Rights and Freedoms Schedule B to the Canada Act 1982 (U.K.) 1982, c. 11 and applicable Provincial Human Rights Codes and employment law in Canada. 20. NOTICE: Company is restricted from receiving funds appropriated or otherwise made available under U.S. Public Laws 110-161, 111-8, and 111-117. 21. U.S. Government Work. The following provision applies only to direct sales by Company to the US Government. The Parties acknowledge that Equipment ordered and delivered under this Agreement are Commercial Items as defined under Part 12 of the Federal Acquisition Regulation (FAR). In particular, Company agrees to be bound only by those Federal contracting clauses that apply to “commercial” suppliers and that are contained in FAR 52.212-5(e)(1). The following provision applies only to indirect sales by Company to the US Government. As a Commercial Item Subcontractor, Company accepts only the following mandatory flow down provisions: 52.219-8; 52.222-26; 52.222-35; 52.222-36; 52.222-39; 52.247-64. If the sale of the Equipment is in connection with a U.S. Government contract, Customer certifies that it has provided and will provide current, accurate, and complete information, representations and certifications to all government officials, including but not limited to the contracting officer and officials of the Small Business Administration, on all matters related to the prime contract, including but not limited to all aspects of its ownership, eligibility, and performance. Anything herein notwithstanding, Company will have no obligations to Customer unless and until Customer provides Company with a true, correct and complete executed copy of the prime contract. Upon request, Customer will provide copies to Company of all requested written communications with any government official related to the prime contract prior to or concurrent with the execution thereof, including but not limited to any communications related to Customer's ownership, eligibility or performance of the prime contract. Customer will obtain written authorization and approval from Company prior to providing any government official any information about Company's performance of the work that is the subject of the Proposal or this Agreement, other than the Proposal or this Agreement. 22. Limited Waiver of Sovereign Immunity. If Customer is an Indian tribe (in the U.S.) or a First Nation or Band Council (in Canada), Customer, whether acting in its capacity as a government, governmental entity, a duly organized corporate entity or otherwise, for itself and for its agents, successors, and assigns: (1) hereby provides this limited waiver of its sovereign immunity as to any damages, claims, lawsuit, or cause of action (herein “Action”) brought against Customer by Company and arising or alleged to arise out of the furnishing by Company of any product or service under this Agreement, whether such Action is based in contract, tort, strict liability, civil liability or any other legal theory; (2) agrees that jurisdiction and venue for any such Action shall be proper and valid (a) if Customer is in the U.S., in any state or United States court located in the state in which Company is performing this Agreement or (b) if Customer is in Canada, in the superior court of the province or territory in which the work was performed; (3) expressly consents to such Action, and waives any objection to jurisdiction or venue; (4) waives any requirement of exhaustion of tribal court or administrative remedies for any Action arising out of or related to this Agreement; and (5) expressly acknowledges and agrees that Company is not subject to the jurisdiction of Customer’s tribal court or any similar tribal forum, that Customer will not bring any action against Company in tribal court, and that Customer will not avail itself of any ruling or direction of the tribal court permitting or directing it to suspend its payment or other obligations under this Agreement. The individual signing on behalf of Customer warrants and represents that such individual is duly authorized to provide this waiver and enter into this Agreement and that this Agreement constitutes the valid and legally binding obligation of Customer, enforceable in accordance with its terms.

1-26.130-4 (0114) Supersedes 1-26.130-4(1013)

1

Horsman, Stephen

From: Celli, MichaelSent: Wednesday, April 23, 2014 1:12 PMTo: Horsman, StephenSubject: FW: Revelstoke, BC : Odour Control Systems : Revised Price for Biofilters

This is unexpected, but FYI. Let me know when you have finished your review and I will incorporate these updated numbers. Thanks, Michael Celli, P.Eng. T: 604.444.6425 [email protected] AECOM Fourth Floor, 3292 Production Way Burnaby, BC, Canada V5A 4R4 T: 604.444.6400 F: 604.294.8597

From: Peter Martensson [mailto:[email protected]] Sent: Wednesday, April 23, 2014 12:33 PM To: Celli, Michael Cc: 'Jeff Kundert' Subject: RE: Revelstoke, BC : Odour Control Systems : Revised Price for Biofilters Hi Michael, We were able to secure some better costing for the tank and the controller which has resulted in good price reductions for the two quotes of approximately 18% each. Quote Flow rate Original price Revised price 14‐2027a‐1 9,350 m3/hr $320,000 $265,000 14‐2027b‐1 1,530 m3/hr $176,000 $145,000 Hopefully you still have time to incorporate the new values into your review. Peter Martensson Business Development Manager

BB: (519) 709‐4314 Website: www.biorem.biz

From: Peter Martensson Sent: April-17-14 5:20 PM To: 'Celli, Michael'

2

Cc: 'Jeff Kundert' Subject: Revelstoke, BC : Odour Control Systems Hi Michael, I believe Jeff is out traveling so I thought I would send you the proposal directly. We have designed the larger air flow system with a rectangular tank and the smaller air flow is better suited for a round tank design. Each design includes integral humidifier and winterization package. I have included GA drawings of each system proposed. If there are any space constraints at site, please let me know and I will make necessary changes. Take care and have a happy Easter. Peter Martensson Business Development Manager

7496 Wellington Road 34, RR #3 • Guelph, Ontario • Canada, N1H 6H9 • BlackBerry: (519) 709‐4314 Website: www.biorem.biz This email and any files transmitted with it are privileged, confidential, subject to copyright and intended solely for the use of the individual or entity to whom they are addressed; BIOREM Inc. or its subsidiaries. Any unauthorized use, copying, review or disclosure is prohibited. Please notify the sender immediately if you have received this communication in error. Thank you for your assistance and co‐operation.

Modular Biofilter (BF) BUDGET PROPOSAL Revelstoke System 1 – Opp #14-2027a-1

BIOREM® Group of Companies www.biorem.biz Page 1 of 5

1.0 Product Description The biofilter systems extract foul air for subsequent preconditioning in the humidification stage and oxidation through the XLD media bed prior to atmospheric discharge.

Odorous compounds in the air entering the biofilter are solubilized into the moisture layer surrounding the individual media particles or are adsorbed directly to their surface. Bacteria present within this moisture film utilize the compounds as substrate. The compounds are biologically oxidized to CO2, H2O and inorganic salts and clean air is discharged to atmosphere. It is critical that the filter creates an optimal environment to enhance microbial development. Maintaining proper air temperature, pH, moisture and nutrient levels are essential for favorable biofilter performance and removal efficiency

2.0 Project Details Process Parameter Value Flow Rate: 9,350 m3/h Given Inlet Air Temperature: 10 - 40 °C Given Ambient Temperature: -40 - 40 °C Assumed Water Hardness: 50 ppm maximum allowed Required Average Inlet H2S: 1.0 ppm Assumed Peak Inlet H2S: 3.5 ppm Assumed Design Parameter Value Material of Construction: FRP Biofilter EBRT: 15 seconds Media Volume: 39 m3 Vessel Dimensions: 10 m length : 3 m width : 3 m height Water Consumption: 2055 LPD Electrical - Main Power supply: 575V, 3Ph, 60Hz Empty Vessel Weight: (each vessel) 3,000 kg Operational Weight: (each vessel) 40,000 kg 3.0 System Performance

A. When loaded under average conditions the biofiltration system will achieve at least 99 percent removal of H2S when operating within the process parameters shown above.

B. When loaded under average conditions the biofilter system shall provide at least 90 percent odor removal for inlet concentration levels between 10,000 and 6,000 OU. For inlet concentration levels less than 6,000 OU, the outlet concentration levels shall be less than 600 OU. (Odor concentrations to be determined using ASTM-E679 with a 20 liter/minute odor panel presentation rate).



4.0 Warranties

A. The Manufacturer warrants that the biofilter media will not compact, degrade or decompose for a period of 10 years from the date of Substantial Completion, provided that the system is operated in accordance with the Manufacturer’s printed Operation and Maintenance Manuals.

B. All mechanical components will be warranted free of manufacturing defects for a period of 12 months from Substantial Completion, or 18 months from shipment, whichever occurs first.

5.0 Scope of Supply

1. (1) Modular biofilter vessel with integral humidification chamber and removable covers. Material of construction to be UV and H2S resistant FRP.

2. Humidification mass transfer packing, provided in boxes approximately 10 cubic feet in size.

3. Engineered biofilter media, provided in skidded bags approximately one cubic metre in size.

4. (1) 610 mm diameter butterfly damper for airflow control upstream of fan.

5. (1) Rectangular flexible transition piece between fan and vessel inlet flange, 304 SS flange.

6. (1) 2.2 kW recirculation pump.

7. Schedule 80 PVC manifold and spray nozzles for optimized coverage of humidification media.

8. Schedule 80 PVC manifold and spray nozzles for optimized coverage of biofilter media.

9. (1) 7.5 kW centrifugal FRP exhaust fan rated at 8” WC, TEFC motor.

10. Control Panel:

i. NEMA 4X 304 stainless steel enclosure with pedestal legs.

ii. Door mounted fused disconnect.

iii. System ON pilot light.

iv. Motor starter and Hand/Off/Auto selector switch for exhaust fan.

v. Motor starter and Hand/Off/Auto selector switch for recirculation pump.

vi. Status lights (on when running) for fan and recirculation pump.

vii. Recirculation low flow alarm light.

viii. Alarm reset push button.

ix. Dry contacts for transmitting signals to remote location.



11. (1) Water panel housing the following instrumentation and fluid control valves:

i. (1) Pressure indicator on water supply line.

ii. (1) Flow indicator/switch, to display recirculated water flow rate, signal alarm and shut off recirculation pump in case of reduced water flow.

iii. (1) Flow totalizing indicator, to display the amount of irrigation water delivered to the biofilter media.

iv. (1) Flow indicator to display blow down water flow rate.

v. (1) Lot fluid control valves and strainers.

12. Instrumentation and fluid control valves external to water panel:

i. (2) Differential pressure gauges to measure pressure drop across medias (local read).

ii. (1) Inlet air temperature indicator (local read).

iii. (2) Pressure indicators (water), on inlet and outlet sides of the recirculation pump.

iv. (1) Lot fluid control valves and strainers.

13. Winterization system: (All heaters come complete with thermostat for temperature control)

i. (1) 50 kW immersion heater for humidification sump.

ii. (1) Space heater for control panel.

iii. (1) Space heater for water panel.

14. Engineering Submittal Packages.

15. Operation and Maintenance Manuals.

16. Field Services will consist of two (2) consecutive days (1 trip) for system commissioning and operator training.

17. Performance Testing will consist of two (2) consecutive days (1 trip) for taking system measurements including H2S and (6) odour samples.

Note: System equipment proposed is designed for a NFPA 820 2012 Type C ventilation environment.



The following items listed are to be supplied by the Contractor and are not in the Manufacturer’s Scope of Supply.

1. Provide all equipment offloading, temporary storage and placement.

2. Provide labour, materials and equipment for the installation and assembly of all Biorem supplied equipment and instrumentation. Supply and install all other materials or equipment required for a complete operational system.

3. Site preparation and clearing of materials.

4. Design and supply an appropriately sized reinforced concrete slab to handle full load of the biofilter vessel, fan, control panel, and water panel. Provide collection and analysis of any geo-technical data as required.

5. Supply and install all required protective coatings or paint such as UV paint for piping or concrete paint.

6. Supply and install all external water piping and drain piping to and from the biofilter vessel, water panel and other fluid equipment including heat tracing, insulation, piping supports, drainage traps where necessary and / or UV protective paint. If winterizing system, contractor to insulate differential pressure gauge enclosures.

7. Supply and install air ductwork to and from the biofilter system including exhaust stack, flexible connectors, interconnecting ducting, manual or actuated dampers, filters, insulation and piping supports, unless otherwise indicated above.

8. Supply and install all hardware, supports, guide wires, duct gaskets, expansion joints and connectors needed for a complete and operational system.

9. Supply make-up water at a minimum pressure of 40 psi. Water analysis for hardness or other parameters as necessary.

10. Provide main electrical service and system field wiring outside the main odor control panel. All electrical requirements for heat tracing and equipment not specifically provide by Biorem to be provided by others.

11. Media onsite storage and installation. The Contractor shall be required to remove biofilter covers, install and distribute media evenly across the biofilter, assemble media irrigation system and reinstall covers.

12. Provide duct balancing, and system functional, hydrostatic, vibration and performance testing to be conducted by OTHERS as may be specified.



BUDGET QUOTATION April 17, 2014

QUOTATION #: 14-2027a-1 Budget Price (CAD)

01

Modular Biofilter (Please refer to Section 5.0 for Scope of Supply) $320,000

01 Freight INCLUDED

01 Commissioning and Training INCLUDEDNOTES: 1. All components are FOB jobsite. 2. Payment Terms: 10% upon approvals, 80% upon equipment delivery, 10% upon system commissioning. 3. Applicable taxes are extra. 4. Prices are guaranteed for 90 days, from date of quotation. 5. Submittals typically provided 4-6 weeks after acknowledgment of order and with confirmation of Biorem’s Project Manager.

Shipment is 12-14 weeks after approved submittals. TERMS & CONDITIONS PRICING Unless otherwise specified in writing by BIOREM® Technologies Inc, (BIOREM®) price does not include any taxes, excises, duties, tariffs or other governmental charges which BIOREM® may be required to pay or collect under existing or future law with respect to the sale, transportation, delivery, storage, installation or use of any of the equipment sold by BIOREM®. CANCELLATION Unless otherwise agreed in writing by the parties, the Buyer may not cancel the Order, except upon written notice and payment to Seller of an amount covering all costs incurred under the Order, all costs which arose out of the cancellation, and a cancellation fee of 50% of the Order Price. Materials received and Goods manufactured in part or whole under the Order prior to the time of cancellation shall be retained by and shall be property of the seller. When calculating the cancellation related costs, payments made by buyer to seller prior to cancellation shall be taken into account. LIMITATION OF LIABILITY –SELLER’S LIABILITY TO THE PRICE ALLOCABLE TO THE GOODS DETERMINED DEFECTIVE, AND IN NO EVENT WILL SELLER’S CUMULATIVE LIABILITY BE IN EXCESS OF THE TOTAL SALES ORDER PRICE, WHETHER ARISING UNDER WARRANTY, CONTRACT, NEGLIGENCE, STRICT LIABILITY, INDEMNIFICATION, OR ANY OTHER CAUSE OR COMBINATION OF CAUSES WHATSOEVER. SELLER WILL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR INDEMNIFICATION, OR ANY OTHER CAUSE OR COMBINATION OF CAUSES WHATSOEVER. THIS LIMITATION SHALL APPLY NOTWITHSTANDING ANY FAILURE OF ESSENTIAL PURPOSE OF ANY LIMITED REMEDY. BUYER’S REMEDIES ARE SPECIFICALLY LIMITED TO THE REPAIR OR REPLACEMENT OF THE GOODS AND IS EXCLUSIVE OF ALL OTHER REMEDIES. SHOULD THESE REMEDIES BE FOUND INADEQUATE OR TO HAVE FAILED THEIR ESSENTIAL PURPOSE FOR ANY REASON WHATSOEVER, BUYER AGREES THAT RETURN OF THE FULL SALES ORDER PRICE TO IT BY SELLER SHALL PREVENT REMEDIES FROM FAILING THEIR ESSENTIAL PURPOSE AND SHALL BE CONSIDERED BY BUYER AS A FAIR AND ADEQUATE REMEDY.

Modular Biofilter (BF) BUDGET PROPOSAL Revelstoke System 2 – Opp #14-2027b-1


1.0 Product Description The biofilter systems extract foul air for subsequent preconditioning in the humidification stage and oxidation through the XLD media bed prior to atmospheric discharge.

Odorous compounds in the air entering the biofilter are solubilized into the moisture layer surrounding the individual media particles or are adsorbed directly to their surface. Bacteria present within this moisture film utilize the compounds as substrate. The compounds are biologically oxidized to CO2, H2O and inorganic salts and clean air is discharged to atmosphere. It is critical that the filter creates an optimal environment to enhance microbial development. Maintaining proper air temperature, pH, moisture and nutrient levels are essential for favorable biofilter performance and removal efficiency

2.0 Project Details Process Parameter Value Flow Rate: 1,530 m3/h Given Inlet Air Temperature: 10 - 40 °C Given Ambient Temperature: -40 - 40 °C Assumed Water Hardness: 50 ppm maximum allowed Required Average Inlet H2S: 1.0 ppm Assumed Peak Inlet H2S: 3.5 ppm Assumed Design Parameter Value Material of Construction: FRP Biofilter EBRT: 15 seconds Media Volume: 6.4 m3 Vessel Dimensions: 2.44 m diameter : 3 m height Water Consumption: 325 LPD Electrical - Main Power supply: 575V, 3Ph, 60Hz Empty Vessel Weight: (each vessel) 1,500 kg Operational Weight: (each vessel) 12,000 kg 3.0 System Performance

A. When loaded under average conditions the biofiltration system will achieve at least 99 percent removal of H2S when operating within the process parameters shown above.

B. When loaded under average conditions the biofilter system shall provide at least 90 percent odor removal for inlet concentration levels between 10,000 and 6,000 OU. For inlet concentration levels less than 6,000 OU, the outlet concentration levels shall be less than 600 OU. (Odor concentrations to be determined using ASTM-E679 with a 20 liter/minute odor panel presentation rate).



4.0 Warranties

A. The Manufacturer warrants that the biofilter media will not compact, degrade or decompose for a period of 10 years from the date of Substantial Completion, provided that the system is operated in accordance with the Manufacturer’s printed Operation and Maintenance Manuals.

B. All mechanical components will be warranted free of manufacturing defects for a period of 12 months from Substantial Completion, or 18 months from shipment, whichever occurs first.

5.0 Scope of Supply

1. (1) Modular biofilter vessel with integral humidification chamber and removable covers. Material of construction to be UV and H2S resistant FRP.

2. Humidification mass transfer packing, provided in boxes approximately 10 cubic feet in size.

3. Engineered biofilter media, provided in skidded bags approximately one cubic metre in size.

4. (1) 200 mm diameter butterfly damper for airflow control upstream of fan.

5. (1) Rectangular flexible transition piece between fan and vessel inlet flange, 304 SS flange.

6. (1) 0.6 kW recirculation pump.

7. Schedule 80 PVC manifold and spray nozzles for optimized coverage of humidification media.

8. Schedule 80 PVC manifold and spray nozzles for optimized coverage of biofilter media.

9. (1) 0.75 kW centrifugal FRP exhaust fan rated at 2.0 kW, TEFC motor.

10. Control Panel:

i. NEMA 4X 304 stainless steel enclosure with pedestal legs.

ii. Door mounted fused disconnect.

iii. System ON pilot light.

iv. Motor starter and Hand/Off/Auto selector switch for exhaust fan.

v. Motor starter and Hand/Off/Auto selector switch for recirculation pump.

vi. Status lights (on when running) for fan and recirculation pump.

vii. Recirculation low flow alarm light.

viii. Alarm reset push button.

ix. Dry contacts for transmitting signals to remote location.



11. (1) Water panel housing the following instrumentation and fluid control valves:

i. (1) Pressure indicator on water supply line.

ii. (1) Flow indicator/switch, to display recirculated water flow rate, signal alarm and shut off recirculation pump in case of reduced water flow.

iii. (1) Flow totalizing indicator, to display the amount of irrigation water delivered to the biofilter media.

iv. (1) Flow indicator to display blow down water flow rate.

v. (1) Lot fluid control valves and strainers.

12. Instrumentation and fluid control valves external to water panel:

i. (2) Differential pressure gauges to measure pressure drop across medias (local read).

ii. (1) Inlet air temperature indicator (local read).

iii. (2) Pressure indicators (water), on inlet and outlet sides of the recirculation pump.

iv. (1) Lot fluid control valves and strainers.

13. Winterization system: (All heaters come complete with thermostat for temperature control)

i. (1) 30 kW immersion heater for humidification sump.

ii. (1) Space heater for control panel.

iii. (1) Space heater for water panel.

14. Engineering Submittal Packages.

15. Operation and Maintenance Manuals.

16. Field Services will consist of two (2) consecutive days (1 trip) for system commissioning and operator training.

17. Performance Testing will consist of two (2) consecutive days (1 trip) for taking system measurements including H2S and (6) odour samples.

Note: System equipment proposed is designed for a NFPA 820 2012 Type C ventilation environment.



The following items listed are to be supplied by the Contractor and are not in the Manufacturer’s Scope of Supply.

1. Provide all equipment offloading, temporary storage and placement.

2. Provide labour, materials and equipment for the installation and assembly of all Biorem supplied equipment and instrumentation. Supply and install all other materials or equipment required for a complete operational system.

3. Site preparation and clearing of materials.

4. Design and supply an appropriately sized reinforced concrete slab to handle full load of the biofilter vessel, fan, control panel, and water panel. Provide collection and analysis of any geo-technical data as required.

5. Supply and install all required protective coatings or paint such as UV paint for piping or concrete paint.

6. Supply and install all external water piping and drain piping to and from the biofilter vessel, water panel and other fluid equipment including heat tracing, insulation, piping supports, drainage traps where necessary and / or UV protective paint. If winterizing system, contractor to insulate differential pressure gauge enclosures.

7. Supply and install air ductwork to and from the biofilter system including exhaust stack, flexible connectors, interconnecting ducting, manual or actuated dampers, filters, insulation and piping supports, unless otherwise indicated above.

8. Supply and install all hardware, supports, guide wires, duct gaskets, expansion joints and connectors needed for a complete and operational system.

9. Supply make-up water at a minimum pressure of 40 psi. Water analysis for hardness or other parameters as necessary.

10. Provide main electrical service and system field wiring outside the main odor control panel. All electrical requirements for heat tracing and equipment not specifically provide by Biorem to be provided by others.

11. Media onsite storage and installation. The Contractor shall be required to remove biofilter covers, install and distribute media evenly across the biofilter, assemble media irrigation system and reinstall covers.

12. Provide duct balancing, and system functional, hydrostatic, vibration and performance testing to be conducted by OTHERS as may be specified.



BUDGET QUOTATION April 17, 2014

QUOTATION #: 14-2027b-1 Budget Price (CAD)

01

Modular Biofilter (Please refer to Section 5.0 for Scope of Supply) $176,000

01 Freight INCLUDED

01 Commissioning and Training INCLUDEDNOTES: 1. All components are FOB jobsite. 2. Payment Terms: 10% upon approvals, 80% upon equipment delivery, 10% upon system commissioning. 3. Applicable taxes are extra. 4. Prices are guaranteed for 90 days, from date of quotation. 5. Submittals typically provided 4-6 weeks after acknowledgment of order and with confirmation of Biorem’s Project Manager.

Shipment is 12-14 weeks after approved submittals. TERMS & CONDITIONS PRICING Unless otherwise specified in writing by BIOREM® Technologies Inc, (BIOREM®) price does not include any taxes, excises, duties, tariffs or other governmental charges which BIOREM® may be required to pay or collect under existing or future law with respect to the sale, transportation, delivery, storage, installation or use of any of the equipment sold by BIOREM®. CANCELLATION Unless otherwise agreed in writing by the parties, the Buyer may not cancel the Order, except upon written notice and payment to Seller of an amount covering all costs incurred under the Order, all costs which arose out of the cancellation, and a cancellation fee of 50% of the Order Price. Materials received and Goods manufactured in part or whole under the Order prior to the time of cancellation shall be retained by and shall be property of the seller. When calculating the cancellation related costs, payments made by buyer to seller prior to cancellation shall be taken into account. LIMITATION OF LIABILITY –SELLER’S LIABILITY TO THE PRICE ALLOCABLE TO THE GOODS DETERMINED DEFECTIVE, AND IN NO EVENT WILL SELLER’S CUMULATIVE LIABILITY BE IN EXCESS OF THE TOTAL SALES ORDER PRICE, WHETHER ARISING UNDER WARRANTY, CONTRACT, NEGLIGENCE, STRICT LIABILITY, INDEMNIFICATION, OR ANY OTHER CAUSE OR COMBINATION OF CAUSES WHATSOEVER. SELLER WILL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR INDEMNIFICATION, OR ANY OTHER CAUSE OR COMBINATION OF CAUSES WHATSOEVER. THIS LIMITATION SHALL APPLY NOTWITHSTANDING ANY FAILURE OF ESSENTIAL PURPOSE OF ANY LIMITED REMEDY. BUYER’S REMEDIES ARE SPECIFICALLY LIMITED TO THE REPAIR OR REPLACEMENT OF THE GOODS AND IS EXCLUSIVE OF ALL OTHER REMEDIES. SHOULD THESE REMEDIES BE FOUND INADEQUATE OR TO HAVE FAILED THEIR ESSENTIAL PURPOSE FOR ANY REASON WHATSOEVER, BUYER AGREES THAT RETURN OF THE FULL SALES ORDER PRICE TO IT BY SELLER SHALL PREVENT REMEDIES FROM FAILING THEIR ESSENTIAL PURPOSE AND SHALL BE CONSIDERED BY BUYER AS A FAIR AND ADEQUATE REMEDY.

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