1. Introduction 2. Summary of the Air Monitoring Activities - PDF by vmarcelo



August 13, 2008

Mr. Howard Lee
Executive Director, Asset Management
Parc Downsview Park Inc.
35 Carl Hall Road
Toronto, ON M3K 2B6

Re:         Air Quality Monitoring at Parc Downsview Park, Downsview, Ontario on
            August 11, 2008

Dear Mr. Lee:

GENIVAR Ontario Inc. (GENIVAR) is pleased to submit this report summarizing the results of
the air quality monitoring conducted at Parc Downsview Park, Downsview, Ontario on August
11, 2008.

1.        Introduction
Parc Downsview Park Inc. (PDP) retained GENIVAR to conduct an outdoor air quality
monitoring service throughout their property in order to identify the potential release of airborne
asbestos fibres associated with the recent fire/explosion at the Sunrise Propane Industrial Gases
facility. Sunrise Propane Industrial Gases facility is located at 54 Murray Road, North York,
Ontario which distributes various types of industrial gases and the facility is nearby to the
southeast PDP boundary.

2.        Summary of the Air Monitoring Activities
GENIVAR retained Safetech Environmental Limited to carry out the fieldwork and laboratory
analysis for the outdoor air quality monitoring at the following three locations assigned by PDP
personnel throughout Parc Downsview Park:
      •   Behind 35 Carl Hall Road (PDP Office Building);
      •   Outdoor soccer field (behind 75 Carl Hall Road); and
      •   Baseball field (along Stanley Green Park).
On August 11, 2008, three air samples were obtained at these outdoor sampling locations
followed by Phase Contrast Microscopy (PCM) analysis conducted in accordance with the
applicable protocol to identify potential presence of the airborne asbestos fibres. PCM analysis
was carried out according to the protocol outlined in NIOSH Method 7400. The laboratory
                                                            S:\MA\08\MA-08-224-00-MA\Report\Air Quality Testing Report.doc

600 Cochrane Drive, Suite 500, Markham, Ontario L3R 5K3
Telephone: 905.475.7270 Fax: 905.475.5994 www.genivar.com
Howard Lee, Executive Director, Asset Management                                     August 11, 2008
Parc Downsview Park Inc.                                                                      Page 2

results for all air samples were <0.01 fibres/cubic centimetre. The laboratory results indicate
that an acceptable air quality level (<0.01 fibres/cubic centimetre) at the monitored areas during
the time of testing. The air quality monitoring results and the documented sampling and analysis
procedures are attached in Appendix A.

3.     Conclusion
The project work related to the outdoor air quality monitoring at Parc Downsview Park,
Downsview, Ontario was conducted in accordance with the applicable regulations. GENIVAR is
satisfied that the outdoor air quality monitoring was conducted in a professional and competent
manner. As per the laboratory results for the air quality monitoring event conducted on August
11, 2008, the monitoring areas were found to be free from airborne asbestos.

4.     Statement of Limitation
This report was prepared for the exclusive use of Parc Downsview Park Inc. Third parties
cannot rely on the findings and conclusions. Any use that a third party makes of this report, or
any reliance on decisions made based on it, is the responsibility of such third parties. GENIVAR
accepts no responsibility for damages, if any, suffered by any third party as a result of decisions
made, or actions taken, based on this report. GENIVAR reserves the right to amend and/or
supplement this report in the event additional information, documentation or evidence becomes
The information and conclusions contained in this report are based upon work undertaken by
trained professional and technical staff in accordance with generally accepted engineering and
scientific practices current at the time the work was performed. Conclusions presented in this
report should not be construed as legal advice and represent the best technical judgement of
GENIVAR staff. And GENIVAR warrants that the findings and conclusions contained herein
have been prepared in accordance with generally accepted air quality monitoring procedures for
asbestos fibres identification.
If you have any questions, please do not hesitate to contact our office.

Yours truly,
GENIVAR Ontario Inc.

Muin Husain, Ph.D., P.Geo.                                   Zakir Hossain, M.A., P.Eng.
Manager, Environmental Management                            Project Engineer

                                           APPENDIX A

August 12, 2008

Genivar Ontario Inc.
600 Cochrane Drive, Suite 500
Markham, ON, L3R 5K3

Attn.: Mr. Zakir Hossain

Re:   Asbestos Air Monitoring Results
      Parc Downsview Park, 10-35 Carl Hall Road, Toronto, ON


Safetech Environmental Limited (SEL) was contracted to provide air monitoring services
associated with the asbestos management program, at Parc Downsview Park, 10-35 Carl Hall
Road, Toronto, Ontario. The air monitoring was conducted on August 11, 2008. We understand
concern was raised by user groups regarding the potential exposure to asbestos-containing
materials associated with the recent explosion at industrial facility south of Parc Downsview
Park. The purpose of the air monitoring was to determine airborne fibre levels in the designated
areas of concern.

Asbestos is a designated substance and as such exposure to airborne asbestos is regulated
under R.R.O. 1990, Reg. 837, as amended to Ontario Regulation 386/00 - Designated
Substance - Asbestos, made under the Occupational Health and Safety Act. Under this
regulation, the most stringent acceptable Time-Weighted Average Exposure (TWAE)
concentration for a worker is 0.1 fibres/cc, as determined by Phase Contrast Microscopy (PCM)
fibre counting techniques. PCM analysis on an air sample provides a total fibre count.
Therefore, asbestos fibres cannot be differentiated from other types of fibres using this method.

Three Phase Contrast Microscopy (PCM) air samples were collected within the designated
areas on August 11, 2008. Air-sampling pumps were calibrated to a flow rate of 15.0 litres per
minute. The samples were collected using 25 mm three piece cassette with 50 mm electrically
conductive extension cowl and cellulose ester filter, 0.8 µm (recommended 0.45 to 1.2 in
method) pore size, and back-up pad. The air samples were analyzed in accordance with U.S.
National Institute of Occupational Safety and Health (NIOSH) Manual of Analytical Methods,
Method 7400, Issue 2: Asbestos and other Fibres by PCM (August 15, 1994), using the
asbestos fibre counting rules. The quantitative working range of this method is 0.04 to 0.5
fibre/cc for a 1000L air sample. The Limit of Detection (LOD) depends on sample volume and
quantity of interfering dust, and is < 0.01 fibre/cc for
atmospheres free of interferences. The method gives an index of airborne fibres. Fibers less
than approximately 0.25 µm in diameter will not be detected by this method. In addition, other
airborne fibers and particles that fall within the counting range criteria may act as possible
interferences. Demolition and construction related work areas where high levels of dust are
present might overload the membrane and/or interfere with the analysis. As required by NIOSH
Method 7400, blank filters were submitted for analysis to ensure that no contamination of the
filters occurred during sampling or analytical procedures. Analytical results, as reported in the
result table of this report, have been field blank corrected.


Three air samples were collected and results of subsequent PCM analysis are presented in
Table I.

                                          TABLE I
                           Results of PCM Airborne Fibre Sampling
                                       August 11, 2008

           SEL Sample                                                     Volume       Result
     #                           Location/Description             Date
               #                                                          (Litres)   (Fibres/cc)
             2008-08-                                            August
     1                         Behind 35 Carl Hall Road                    2873        <0.01
               082                                               11/08
             2008-08-        Soccer Field Behind 75 Carl         August
     2                                                                     1170        <0.01
               083                   Hall Road                   11/08
             2008-08-                                            August
     3                           Baseball Field South                      2990        <0.01
               084                                               11/08
         The two field blanks were found to have <7 fibres/100 Fields


Based on the above air monitoring results, it can be concluded that at the time of testing
airborne fibre levels were well within the Occupational Exposure Limit of 0.1 fibres/cc. In
addition, this airborne fibre level is well within the Ministry of Environment Regulation 419/05
ambient airborne fibre level of 0.04 fibres/cc.

Should you have any questions please do not hesitate to call.

Yours very truly,


D. Glenn Smith, B.Sc. (HE), CRSP, AMRT
Senior Project Manager

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