August 31, 1999
To:Toronto Community Council
From:Acting Commissioner of Urban Planning and Development Services
Subject:Report on Rezoning Application 199004 to amend By-law 1994-0806 to remove the holding symbol (h Zoning):
401 Front Street West by Concord Adex Developments Corp., 23 Spadina Avenue, Toronto, Ontario M5V 3M5 (Ward 24 -
Downtown)
Purpose:
This report recommends Council approval to remove the "h" holding symbol from the property at 401 Front Street West to
permit residential uses. This approval will allow the construction of two residential buildings on the site as envisioned by
the Part II Official Plan. The applicant has shown that the prerequisite environmental conditions as outlined in the Railway
Lands Part II Official Plan, have been met.
Financial Implications:
Not applicable.
Recommendation:
1.It is recommended that Council authorize the City Solicitor to amend Zoning By-law 1994-0806 to remove the holding
symbol from the eastern half of the Front Street General Use Area B (401 Front Street West) and allow the proposed
residential development of the site.
Comments:
Location
The property is located on the south side of Front Street West to the immediate west of Blue Jays Way and east of Spadina
Avenue as shown on the attached Key Map.
Proposal
The applicant proposes to construct two, 28 storey, residential towers with an overall height of 77.1 metres.
Background
The Railway Lands Central Part II Official Plan permits residential uses in the Front Street General Use Areas, subject to
environmental issues such as noise, air quality and vibration being addressed. These conditions were the result of the
settlement of an appeal by GO Transit respecting the proposed residential use. The GO Transit appeal was based on
concerns related to the potential environmental effects arising from the proximity of the development of these blocks to the
Rail Corridor and GO Transit's Bathurst North Yard.
Section 11.8 of the Part II Official Plan outlines the environmental requirements:
-a detailed prediction of noise, vibration and air quality effects, including odour within the proposed buildings and in
surrounding outdoor areas at current levels of rail activity and based on future levels of rail activity;
-a prediction of changes in snow drifting patterns and icing of rails and switches on adjacent sections of the Rail Corridor
and the Bathurst North Yard;
-a detailed outline of proposed measures to reduce the environmental effects and to meet satisfactory standards and
minimize nuisance impacts;
-analyses of the suitability of exterior open balconies and outdoor amenity space; and
-the phasing of construction and assurance that the interim development as well as final phases achieve acceptable
environmental conditions.
The application to remove the "h" holding symbol is required to be circulated for comment and the City is required to
consult with and have regard for the comments of GO Transit. The Part II Plan further states that Council shall enact a
by-law to remove the "h" holding symbol from all or part of the Front Street General Use Areas A and B provided that:
"i)the supplemental Environmental Report required pursuant to Section 11.8 (a) confirms the feasibility of the proposed
residential development on the lands, including methods of mitigation;
ii)appropriate methods of mitigation have been secured; and
iii)site plan approval has been granted."
It should also be noted that Sections 9.1 and 9.2 of this Part II Plan generally state that Council will use its available
powers to ensure that the development provides:
-environmental conditions satisfactory to the City of Toronto for people working and living within and adjacent, to the
Railway Lands Central;
-an Environmental Report which among other conditions requires the provision of buffers (including acoustical walls,
buildings and structures); and
-satisfactory indoor and outdoor air quality and climatic conditions at grade and in other outdoor amenity areas.
In addition, the Part II Plan for the Railway Lands Central requires notice and appropriate warning clauses regarding
possible noise, vibration and/or air quality impacts associated with the existing and future freight and passenger rail and
regional rail and public transit uses in the Rail Corridor, Future Development Area and the Bathurst North Yard to be
provided to any purchasers, landowners or lessees within such developments.
In the comments received on this application City Departments have concurred that the applicant has satisfactorily
addressed all conditions related to removal of the "h". However, GO Transit has continued to voice its concerns respecting
the air quality, noise and vibration impact of its potentially expanded future operations on the proposed development and in
particular has concerns with: projected numbers of trains and passengers and the assumed improvements in emission
controls.
The applicant's consultants (IBI and RWDI) in responding to these concerns, have indicated that Go's projected increase of
train movements by 250% is not achievable without exceptional capital investment in infrastructure. In addition, the
consultants have noted that the expected passenger growth does not require a 250% increase. The consultants have also
concluded that the numbers of idling trains affecting this particular site would not change appreciably and that as new
locomotives are purchased to meet the increased demand and some existing engines are retired, the overall acceptable
standards for air quality and noise would be maintained.
City staff have reviewed this analysis and agree that the applicant has met the conditions outlined in the Part II Plan and
that the proposed development will experience satisfactory environmental conditions.
GO Transit has stated in its letter of August 20, 1999, that it is generally opposed to the development of the Front Street
General Use Areas A and B for residential use, in spite of its Ontario Municipal Board settlement. GO Transit's primary
concern is the potential for objections from future residents of the proposed development. GO Transit thinks that it would
be prudent for the City to safeguard itself and its interests in GO Transit by refusing the development of these lands for
residential uses. City staff have reviewed the proposal, the associated studies and the correspondence between GO Transit
and the applicant's consultants and have concluded that the applicant has addressed all issues to meet City standards.
In reviewing the detailed application for Site Plan Approval, it should be noted that the applicant's proposal will also
require several relatively minor Zoning By-law variances. These would include a minor height variance, due to the sloping
nature of the site, approval of some undersized parking spaces and detailed exceptions to the "build to" zone and the
dimensions of the proposed canopies. In addition, the Undertaking associated with the Site Plan Approval with this
application will require a variety of relatively standard conditions which would be imposed as a result of comments from
the Medical Officer of Health and Commissioner of Works and Emergency Services.
Conclusion:
City staff have reviewed the information by the applicant and support this application subject to conditions which are
attached to my report on the Site Plan Approval. I am therefore recommending removal of the holding symbol from the
Zoning By-law as it applies to 401 Front Street West (the eastern half of the Front Street General Use Area B).
Contact Name:Angus Cranston
Telephone: (416) 392-0425
Fax: (416) 392-1330
E-Mail: acransto@toronto.ca
Beate Bowron
Director, Community Planning, South District
(p:\1999\ug\uds\pln\to991979.pln) - smc
APPENDIX A
Comments of Civic Officials
1.GO Transit (August 25, 1999)
This letter is a follow up to our letter of 20 August 1999 regarding the abovementioned application. We have received a
response from RWDI regarding a preliminary set of comments/ questions re: the air quality study, attached. It is therefore
necessary to update our comments as provided in our 20 August 1999 letter to the City and also to respond to RWDI's
letter.
Regarding future rail traffic levels, our comments in the 20 August letter do not change. As noted in our letter, GO is
particularly concerned that adequate future service plans are considered, in order to ensure that our stakeholders, which
includes the City of Toronto, are not exposed to unanticipated risk limiting service expansions and/or the associated
incremental increased costs for mitigation. Also, we were not advised of this change in rail traffic levels. By deviating
unilaterally in using the reduced future scenario the Environmental Agreement has not been satisfied.
Regarding the simulation of Bathurst North Yard exhaust emissions, RWDI's letter has clarified how the yard source was
simulated. The 21 June report described the yard operation, but did not specifically state what was used in the simulation.
We therefore no longer require further clarification on this matter.
RWDI's letter also answers our question regarding 24 hr NO2 and TSP results.
Regarding the number of trains idling in the rail corridor, our question with respect to sensitivity to the number of trains
idling in the corridor remains. The simulation only deals with ½ to 1 train idling immediately south of the site. The point
that we were trying to make in our 20 August letter is that the effects of idling and moving trains impact areas as far away
as Front Street as indicated in Table 8 (unfortunately Table 8 does not have data with no trains idling). We are therefore
concerned that the incremental effects of 2 to 6 trains idling in the rail corridor between Spadina and just east of Blue Jays
Way (a relatively short distance in the context of the results listed in Table 8), depending on wind conditions, have not
been considered.
The question regarding emission control equipment was part of an earlier set of questions. The 20 August letter does not
identify any further questions in this area.
However, the following observation in RWDI's letter requires a response, "It is not clear if GO Transit would be required
to undertake an environmental impact assessment at the time of any significant growth in the fleet, but such an assessment
would clearly show the need for the retrofit of air pollution control equipment". Several related points need to be made.
The assumption of 50% of the existing fleet being equipped with emission controls by the year 2020 may be reasonable
considering a typical retirement/ replacement rate of existing locomotives over this time frame. However, if there is
significant growth in the fleet in advance of this time frame, the retrofitting of existing equipment with emission control
equipment is not a practical solution as it is a major undertaking requiring a significant re-design of the engine. In fact, it is
our understanding that it is more economical to purchase a new locomotive than to retrofit an existing unit with the
emission control equipment. The premature removal of equipment prior to the end its useful life will require significant
incremental funding requirements from our municipal stakeholders, including the City of Toronto. Secondly, in the event
of complaints from adjacent land owners/ residents, retrofitting locomotives with emission control equipment should not
be considered a realistic alternative for the reasons noted above. Further, any growth in the fleet of locomotives/coaches
would typically be associated with a service expansion. Therefore, any environmental assessment work, if required, would
be in the context of the service expansion which may or may not drive the need for additional rolling stock. The final point
that should be made is that this statement reinforces the importance of the need to build compatible land uses adjacent to
heavily utilized rail corridors.
If you have any further questions, please call.
2.(August 20, 1999)
This letter is in response to the 4 March 1999 circulation of the above-mentioned application and subsequent circulations
dated 29 June 1999 and 20 July 1999.
Prior to outlining our comments regarding this application, it would be useful to review GO Transit's position with respect
to residential land uses on Blocks 21 and 28 and the background associated with the settlement of our objection at the
OMB hearing.
GO Transit does not endorse residential land use on Blocks 21 and 28. We have been consistent in this position from the
beginning of this process. Our concern is not so much about questioning whether a "technical" solution is possible to
mitigate air quality and noise considerations to meet a given set of criteria. Fundamentally, we do not believe it is prudent
to build what is typically a non-compatible use adjacent to a heavily utilized rail corridor and yard.
Notwithstanding these concerns, GO Transit agreed with the developer to settle our objections to the land use changes that
were appealed to the OMB. This settlement was based on i) the approval of particular amendments to the Official Plan,
Zoning By-laws and Environmental Agreement, and ii) certain assurances provided by the developer. The Official Plan and
Environmental Agreement amendments designate a thorough development application review by the City with input from
GO. More specifically, the City is to "consult with and have regard for the comments of GO Transit" when considering an
application to remove the holding symbol.
GO's expectation, therefore, is that the City will consider the adequacy and sufficiency of all studies and the mitigation
measures proposed to enable residential uses adjacent to existing and future rail uses. GO's review and comments are
restricted to dealing with GO related assumptions in the studies, seeking clarification of reported results and similar issues.
We look to the City for considering the comments that are attached in the decision regarding this application. In brief, our
comments relate to compliance with the Environmental Agreement in consulting with GO Transit re: future rail traffic and
ensuring adequate future scenarios are considered for the air quality study; clarification of assumptions in the air quality
study regarding trains idling in Bathurst North Yard; sensitivity considerations of noise and air quality results with respect
to the number of trains idling in the rail corridor; exposure to excessive noise levels if windows are open during non-air
conditioning seasons; and consideration of incremental noise mitigation to accommodate future night time exposures.
GO is concerned that should the City's review not take such matters into account, then the cost of mitigation in the future
may be imposed on GO and, in turn, on the City which shares in the funding of GO. In GO's view, this result could be
avoided now by proper review, with the appropriate conditions being imposed on the developer. For example, the studies
have focussed on current users of the rail corridor but have not included considerations of the Federal proposal for an
airport service whereby incremental costs for mitigation would have to be funded by proponent agencies.
Furthermore, the City is currently negotiating with the railways for the purchase of Union Station and the associated rail
infrastructure. It is therefore in the interest of the City to ensure that rail traffic into the station is not restricted as a result of
this development. Hence, we have taken the liberty of copying this letter to Mr. M. Garrett.
Our comments regarding the air quality study, noise and vibration impact study and general application comments are
attached as attachments 1, 2 and 3 respectively.
In conclusion, we look to the City for considering these comments in their decision regarding this application with respect
to the areas noted above and in the attachments. If you have any further questions, please call.
Attachment 1
Comments - Air Quality Study, Block 21 - Towers A and B, Railway Lands Central, dated 21 June 1999, RWDI
- Pg 4 - "The traffic volumes predicted by GO Transit for the year 2020 showed an increase in existing traffic by almost
250%. This increase in traffic seemed significantly higher than previous 20 year projections provided by GO Transit for
earlier studies in the rail corridor....As a result of IBI Group's evaluation, a 100% increase in traffic volume was
simulated for the future (2020) traffic scenario."
GO Transit did not provide a prediction of traffic for 2020. Based on meetings with Concord Adex and their consultants, it
was our understanding that the study would use future traffic levels identified in the previous air quality analysis. RWDI
provided traffic data for 2010 from a study for the CN Tower redevelopment in 1997. GO subsequently suggested changes
to the hourly distribution of train moves. The overall number of passenger train moves did not increase. The increase in
train moves resulted from revisions to equipment (non-revenue) moves. It appears that the train move tabulations in earlier
studies were based on an east storage facility which significantly reduces the number of equipment moves through the west
ladder. At this time, with the redevelopment of the Danforth Yard, opportunities for an east storage facility are limited,
therefore, equipment moves for the future scenario were prorated upwards accordingly to reflect this situation.
The scenario used in the air quality study derived from the Year 2021 Plan would likely preclude opportunities for service
expansions beyond peak period service enhancements on virtually all corridors. The 2021 plan entails a base minimum of
enhancements to peak period services and does not include any provision for all day services on the existing limited service
corridors or proposed airport services. In that regard, we are mindful of recent decisions of the Canadian Transportation
Agency which concluded that, while municipalities are responsible for the risk relating to the approval of residential
development near operating rail corridors, that assumption of risk does not extend to increased rail services which were not
contemplated or addressed at the time the development was approved. For that reason, GO is particularly concerned to
ensure that adequate future service plans are considered, in order to ensure that our stakeholders, which includes the City of
Toronto, are not exposed to unanticipated risk limiting service expansions or incrementally increased costs associated with
mitigation.
Appendix L does provide an analysis of the higher future traffic scenario, but it does not indicate whether the results are
acceptable.
Up until the time of receiving the final report, GO Transit was not advised of this change in future traffic levels used by the
consultant. We were consulted in the early stages of the study and an agreed upon approach for future traffic levels was
established. By deviating unilaterally in using the reduced future scenario the Environmental Agreement has not been
satisfied, and future service enhancements beyond the minimum may be precluded.
- It isn't clear how the Bathurst North Yard source was included in the analysis. Table 2 notes that 3 trains were modelled
and the results were scaled to account for 2 to 7 trains idling. For tables 6 to 13, it is not noted what number of trains
idling in the yard were used in the analysis. Further, the text of the report indicates that concentrations are projected for
the rail corridor without reference to the yard. Therefore, it is not clear how or whether the yard was considered.
The current daily practice is that 3 to 7 locomotives idle simultaneously during the peak 2 hours of the pm yard operation.
The analysis should reasonably incorporate this operation.
- The results for the 24 hr criteria for NO2 and TSP are not reported.
- Pg 8 - The assumption regarding trains idling in the corridor in the pm underestimates the situation. Our observations
indicate the equivalent of 2 locomotives idle in the corridor waiting for their allotted platform on a continuous basis
over the pm peak. On an occasional but typical basis up to 6 trains can be idling in the corridor.
The assumption in the study is specific to ½-1 train idling in the corridor immediately south of the site.
The study indicates that air quality considerations will be impacted negatively with an increasing number of trains idling in
close proximity to the site. The study also indicates that under existing conditions the effects of idling and moving trains
negatively affect areas as far away as Front Street. With this information, it is not clear why the assumption restricts idling
trains to one area immediately south of the site.
By only considering ½ -1 train idling immediately south of the site, incremental affects of up to 6 idling trains in the
vicinity of the site are not considered.
We have a concern in this regard for both current and future operations. Complaints may result in constraints on train
queueing location in the near term. Secondly, any reconfiguration or relocation of switches in the future in this area may be
constrained as a result of restrictions on train queueing locations. Therefore, the study should offer an opinion on the
sensitivity of the results regarding the number of trains queueing in the corridor to enable an assessment of the potential
impact on current and future train operations.
- Odour concentration modelled based on the existing site conditions and ½ an idling train as noted in Table 8 indicate a
large number of exceedances. This is consistent with our historical experience with complaints from adjacent land
owners in this area. The modelling of the built up scenarios indicate an improved situation, as reported. It is not clear
how the predicted excessive concentrations (as indicated in Table 8) are dissipated, i.e. are unacceptable odour
concentrations being created elsewhere?
Attachment 2
Comments - Revised Noise and Vibration Impact Study, Block 21 - East Development, May 27, 1999, J.E. Coulter
Associates Limited
- Pg 3 - "The combination of the increased GO, VIA and CN traffic at night increases by the same factor of about 3
times."
The number of GO trains passing the site at night increases from 11 to 93, an increase much greater than 3 times referred to
in the report. Our understanding is that the proposed mitigation measures will result in interior sound levels at or just below
acceptable levels. Considering this incremental increase in noise levels for the night time period, higher levels of mitigation
may be required.
Pg 3 - Regarding the extent of extraordinary train queuing in the corridor, "This assumption accounts for all but dire
conditions that currently occur only 1 or 2 days per year."
The statement that the abovementioned assumption accounts for all but dire conditions that currently occur only 1 or 2 days
per year is not accurate. Our previous correspondence to the consultants stated that queues can arise from weather and
non-weather related causes (signal/switch problems, platform constraints, equipment problems, late trains, patron illness).
For estimating purposes, it was suggested to the consultants that weather related queueing could occur 2-4 times per month
during Jan-Feb and 1-3 times per month during Dec-March, otherwise, non-weather related queues occur throughout the
year.
Whereas the analysis aims to consider typical conditions, there should be an understanding of the number of times that
deviations (which are also typical and somewhat frequent) occur from the conditions used in the analysis.
- Similar to the train queueing in the rail corridor comment in the air quality study noted in attachment 1, the noise study
should offer an opinion on the sensitivity of the results regarding the number of trains queueing in the corridor to enable
an assessment of the potential impact on future train operations.
- Pg 5 - Bathurst Yard- "Toward the latter part of the afternoon, the engines are restarted and warmed for ½ hour to an
hour."
The locomotives are restarted at approximately 1400 hours which is probably better described as mid-afternoon. Also, the
locomotives idle for 2 hours to perform safety checks and enable pressure to build for operation of the train.
- Pg 5 - Bathurst Yard - The worst case has been modelled as if all 7 engines idled together for a full hour between 1500
and 1600 hours. This is not a realistic scenario as there will be some staggering of the idling times. However, the extra
energy modelled in this scenario realistically accounts for the air conditioner condenser noise that will occur
simultaneously."
The idling of 7 locomotives simultaneously is typical of daily operations. The air conditioner condenser noise should
therefore be additive to this sound level.
- Pg 5 - Bathurst Yard - "At the busiest hour during the morning start up, between approximately 0500 and 0600, we
might anticipate the equivalent of 4 locomotives idling continuously for the full hour (or 6 for 40 minutes each etc.)."
This section is dealing with the possible condition of overnight storage. Similar to the p.m. operation, locomotives would
idle for 2 hours and given the peaked nature of our service, yard departures would likely not be staggered. Therefore, an
assumption of all 7 trains idling simultaneously should be used.
- Pg 9 - Outdoor Amenity Area
An opinion, as required in the Official Plan and Environmental Agreement, with respect to suitability of balconies for use
as amenity space was to be provided in the report. Our concern is that if balconies are provided then some purchasers will
have an expectation of being able to use it as an amenity space. Reference to a MOE guideline stating that since the area of
the balconies is small then the balconies are not considered amenity space does not satisfy the Official Plan requirements in
our opinion.
- The study states that air conditioning and modestly upgraded windows are recommended in this development to meet
noise guidelines. These mitigation measures do not address our concern during the seasons when air conditioning is not
active when residents would typically open windows, notwithstanding the provision of interior positive air pressure with
mechanical systems.
- Last winter, jet blowers were used to clear the snow from switches which generated complaints from residents adjacent
to the rail corridor. It is anticipated that use of the jet blowers will continue in the future when required. The jet blowers
create significant noise levels. The noise study should consider this aspect of the rail operation impact on residential
uses.
Attachment 3
General Application Comments
- The plans have been reviewed with respect to the provision of the access road to the Bathurst North Yard. The
provisions made are satisfactory with respect to physical configuration, however, a satisfactory solution for proposed
access control has not been determined.
3.Urban Planning and Development Services (August 18, 1999)
Zoning Review
The list below indicates where the proposal does not comply with the City's Zoning By-law 438-86, as amended, unless
otherwise referenced.
1. |
a)The proposed mechanical penthouse will have the aggregate horizontal area of 98% of
the area of the roof such building instead of the by-law allows only 30 % of the roof of
such building;
and
b)The proposed width of the mechanical penthouse within the 6 metres of a lot line that
is a street line will have 95% instead of the by-law allows only 20%
(Section 4(3)(a)(i) B. &C.) |
2. |
The by-law requires 1228.0 square metres of indoor residential amenity space. The
proposed indoor residential amenity space is 853.0 square metres and the proposed indoor
residential spaces will not be located within a contiguous multipurpose rooms.
(Section 4(7) of by-law 1994-0806)
Note:the proposed Business Centre and Guest Suites are not considered as residential
amenity spaces. |
3. |
The proposed canopies will not comply with the requirements of Section 7 PART II 6. of
by-law 1994-0806. - See detail plan provided by the architect dated August 10, 1999.
(Section 7 PART II 6.(ii) of by-law 1994-0806) |
4. |
The maximum permitted height is 76.0 metres. The proposed building height is 77.1
metres, the mech. penthouse is 6.5 metres and the proposed height of the flag pole is 16.0
metres above the proposed building ( 77.1 metres).
(Section 4(3)(a) of by-law 1994-0806)
Note:The average grade of the site is 85.1 metres. - average grade is along front Street
West and Blue Jay Way. |
5. |
Twenty-one proposed parking spaces will have dimensions of 4.5 metres by 2.6 metres
instead of the required 5.9 metres by 2.6 metres.
(Section 2(1) def. "Parking space") |
6. |
The proposed residential use is not permitted in this (h)CR District.
(Section 10(260 of by-law 1994-0806) |
7. |
The by-law requires a set back of a building or structure on Blue Jay Way is 2.0 metres and
Front Street West is 4.0 metres. The proposed canopies on Blue Jay Way is 0.0 metre and
the proposed entrance canopy is 0.0 metres and the canopies is 2.0 metres.
(Section 7 PART II 3. (B)) |
8. |
a)Front Street West - The by-law requires build to zone area is 938.08 square metres (
90% ). The proposed build to zone area is 806.0 square metres ( 77% ).
b)Blue Jay Way - The by-law requires build to zone area is 706.32 square metres (90%).
The proposed build to zone area is 542.00 square metres ( 69 %).
( Section 7 PART II 4(a)E.) |
|
Note:This review is only based on the site statistics provided on Plan 2 dated August
18, 1999. The actual calculation of the site statistics must be provided at the time of
the building permit application. |
Other Applicable Legislation and Required Approvals
1. |
The proposal requires Site Plan approval under Section 41 of the Planning Act. |
2. |
The proposal requires conveyance of land for parks purposes, or payment in lieu thereof
pursuant to Section 42 of the Planning Act. |
3. |
The proposal DOES NOT require the approval of Heritage Toronto under the Ontario
Heritage Act. |
4. |
The issuance of any permit by the Chief Building Official will be conditional upon the
proposal's full compliance with all relevant provisions of the Ontario Building Code. |
5. |
The proposal requires the approval of City Works Services regarding ramp approval and
curb cuts. |
4.(July 15, 1999)
I have reviewed the Noise Impact Statement dated May 27, 1999 prepared by J.E. Coulter Associates Limited, for the
above noted Rezoning Application, and find it satisfactory.
As you are aware, the Noise Impact Statement is one of a number of reports required to process your application. At the
time of preparation, final construction designs may not be completed. Therefore, on approval of the application and when
construction plans are finalized, I require a letter from your architect or acoustical consultant which certifies that the
building plans accompanying your building permit application are in conformity with the Noise Impact Statement, with
particular reference to the impact of any H.V.A.C. equipment on neighbouring properties.
Please direct any inquiries to Mr. J. Prashad of the Noise Section.
5.Medical Officer of Health (August 27, 1999)
Further to our letter dated July 7, 1999 our office has received an Air Quality Study (June 21, 1999) prepared by Rowan
Williams Davies & Irwin Inc (RWDI). Staff at Healthy Environments have reviewed this document and offer the following
comments.
Comments:
The consultant states that this study examined predicted air quality impacts based on wind tunnel simulations and
evaluated against provincial criteria, specifically Regulation 337 and Regulation 346. Although the MOE has not published
criteria relating to odour, they have identified a 50% detection limit (the level at which 50% of the population is able to
detect an odour). In addition, exhaust sources were considered in the assessment (locomotives). Due to the location of the
subject site near a rail corridor, it was necessary to verify the number of idling locomotives that wait near Blue Jay Way so
a one week monitoring program was conducted in June. While as many as 6 may be present during the morning and
afternoon periods, locomotives are not typically aligned in front of the development, and as a result their effect will not be
cumulative. It should also be noted that background pollutant concentrations were also accounted for in this study.
Results from NO2 analysis at the existing site show that there are currently air quality impacts at both the perimeter of the
proposed site and at the park on the south side of the rail corridor. When existing traffic volumes were considered, the NO2
concentrations at all sensitive receptors were below the 1 hour criterion of 400 micrograms/cubic metre. When traffic
volumes are increased to levels predicted for the year 2020, the NO2 concentrations remain below 400. Results of the NO2
for the full building configuration indicate that air quality is likely to decrease slightly with the presence of future
developments. Predicted traffic volumes in 2020 with all locomotives equipped with emission controls, the maximum
number of exceedances increased from no occurrences to one per year (390 micrograms/cubic metre to 492 micrograms per
cubic metre). However, the consultant does not consider this significant.
Analysis of the existing site indicates that there are odour impacts from locomotive diesel exhaust, even if the proposed
development were not constructed. Therefore, potential odour complaints were also considered by taking a conservative
approach that would lead to an over estimate of the impacts. Peak odour concentrations generally occur at the podium level
in the amenity space and at the southern facades of Towers A and B, in particular, receptors at and below the 7th floor were
most impacted by locomotive odours. Analysis revealed that odour impacts are not expected inside the buildings resulting
from fresh air drawn into the building by the mechanical system. As precaution, the consultant has recommended that air
intakes systems for frequently occupied spaces be designed to accommodate filter media to remove odours. In addition,
when locomotives are equipped with emission controls, the peak 10-minute dour concentration is reduced with 7
exceedances per year, which the consultant feels is satisfactory for people living in the development. As an estimate, the
odour concentrations were predicted when 50% of the locomotives were retrofitted with 90-100 occurrences per year,
however, when all the locomotives are retrofitted, the number of occurrences is reduced to 17.
Particulate matter from locomotive exhausts were addressed, also in combination with background pollutant levels. Results
have indicated that an improvement over the existing impacts at the site due to changes in the aerodynamics of the site and
that levels are similar to other areas of the city which is considered satisfactory by the consultant. The same can also be
said total suspended particulate. The SO2 and CO predicted evaluations were also in compliance with all relevant Ambient
Air Quality Criteria for both the existing and future traffic patterns.
Based on their analysis, RWDI has provided a series of recommendations for the propose Block 21 site. They include the
following:
1.The design of the mechanical system to allow future installation of carbon filtration at fresh air intakes at frequently
occupied spaces in the event the at odour removal is required;
2.Design of the mechanical system to place suites under positive pressure to minimize potential infiltration of odours
through open windows;
3.Rail operators should be approached to provide data on the emission of odours and ambient air quality monitoring of
existing conditions should be undertaken.
Conclusions:
Based on the submitted information, I would indicate to you that the Air Quality Study has addressed the concerns of this
office and that the recommendations provided in the report, specifically 1 and 2 should be certified on the building plans.
We realize that GO Transit has raised some issues regarding the proposed development, however, we can not overlook the
expertise of RWDI who have conducted numerous studies regarding development in the railway lands. We have received
the response RWDI has provided to GO Transit, and feel that they have been adequately addressed their concerns,
however, there are internal administrative questions that GO may need to resolve regarding emission control equipment.
Finally, the report states that a "warning clause is in place" relating to nuisance odours for open balconies. It may we
prudent for the developer to secure this in purchase agreements with potential buyers.
By copy of this letter I have advised the owner/applicant accordingly. If you have any questions, please do not hesitate to
contact me at 392-7685.