FINAL REPORT 2: Building Investigation – Highland ... · 11/2/2012 · FINAL REPORT 2 –...

FINAL REPORT 2: Building Investigation – Highland Consolidated Middle School

Report Prepared for: Chignecto-Central Regional School Board 60 Lorne Street Truro, NS B2N 3K3 Attention: Jackie Fahey Coordinator, Health & Safety [email protected]

File: 121411939.200.300

November 2, 2012

Stantec Consulting Ltd. Suite 102, 40 Highfield Park Drive

Dartmouth NS B3A 0A3 Tel: (902) 468-7777 Fax: (902) 468-9009

FINAL REPORT 2 – BUILDING INVESTIGATION HIGHLAND CONSOLIDATED MIDDLE SCHOOL

File: 121411939 i November 2, 2012

Executive Summary

Stantec Consulting Ltd. (Stantec) was retained by the Chignecto-Central Regional School Board (CCRSB) to conduct an investigation for potential vapour and water pathways in the building envelope at the Highland Consolidated Middle School (HCMS), located in Westville, Nova Scotia. The site visit was a follow-up to the odour investigation at Highland Consolidated Middle School conducted between January 17 and March 16, 2012, where several staff members had reported health concerns that they correlated with various odours detected in the school.

This report is part of the ongoing odour investigation at the HCMS. Information compiled from each of the following site visits built on each other and is summarized in this report:

• Don Hartt and David Ayres were on site on April 26, 2012 performing a Building Investigation;

• Don Hartt and David Ayres were on site on May 24, 2012, to conduct Building Pathway Investigation;

• Don Hartt was on site on July 17, 2012, to observe the removal of the exterior cladding outside of rooms 218 and 120 for potential concerns in relation to the vapour and water pathways in the building envelope that may be contributing to the odour issue; and,

• Don Hartt was on site on August 24, 2012, to observe the removal of the exterior cladding outside of rooms 215, 119 and room 101, and investigate the main floor south wing for potential concerns in relation to the vapour and water pathways in the building envelope that may be contributing to the odour issue.

As a result of our findings, Stantec concludes the following.

Building Pathway Investigation:

• Potential pathway migration for vapours resulting from roofing materials (old and new) were identified in the wall/roof deck joints;

• Black tar compound, likely from the recent roof replacement, were observed to have seeped into ceiling/wall spaces around the perimeter of the roof deck in the upper floor;

• Multiple air-flow foam stoppers were missing from flutes at either end of building where wall meets roof deck;

• Black tar compound, likely from the recent roof replacement, were observed to have seeped into ceiling spaces through holes in the metal roof deck flutes in the upper floor;

• Air drafts were observed within wall cavities around the roof deck/wall joint in several rooms; • Cracks in concrete block walls were noted in the northern stairwell; • Gaps/spaces were observed between the exterior brick façade and metal sheet siding; and, • Potential pathway migration for vapours resulting from roofing materials (old and new) were

identified in roof deck flute holes caused by rusting and drilling; and,


File: 121411939 ii November 2, 2012

• Elevated levels of total volatile organic compounds (TVOCs) were found in the air sample collected on April 26, 2012, in Room 203 (1.9 ppm) and in the flute cavity of the upper floor north end hallway (25 ppm) relative to the sample collected outdoors (0.001 ppm). Of note is that the windows within the school had bee n closed for days prior to and dur ing the assessment, which would have intensified the odours within the building. The chemical compounds identified in the two (2) samples collected indoors (Room 203 and flute cavity of the upper floor, north end hallway) were believed to be similar in character to the Tremco roofing products used in the final phase of the roof replacement;

Mould Investigation:

• Mould amplifiers were not present in the building as interpreted from the laboratory analysis of eight (8) air samples taken on April 26, 2012;

• Three (3) bulk samples and one (1) tape lift sample of bulk materials were identified by laboratory analysis to support active mould growth (visible as black staining) impacting plywood sheathing and wood studs within the exterior wall cavity of Room 218 during the site visit on May 24, 2012;

• Black staining and water damage was observed on t he exterior sheathing following the removal of the corrugated metal pan c ladding likely resulting from leaking windows, deficiencies in the brick façade mortar, caulking deficiencies around windows and from the former roof which had w as reported to have numerous leaks. These observations were determined to be only affecting the northwest side (front) of the HCMS. The southeast (rear) of the HCMS has a different building construction and was not impacted by either mould or water damage in the areas observed.

• Water staining was observed on wood studs in the parapet along the perimeter of the upper floor;

• Building deficiencies that allow for potential water intrusion were observed with exterior corrugated metal siding in some areas, exterior window caulking on the north side of the building, and flashing in several windows on the east side of the building; and,

• Active mould growth (visible as black staining) impacting plywood and wood studs was identified in Room 218. Sources of mould growth typically were related to building envelope deficiencies, such as: gaps observed between the exterior sheet metal siding and brick façade; poor condition of the window caulking; improperly installed sheet metal siding; and deficiencies around window cladding identified during a previous site visit.


File: 121411939 iii November 2, 2012

Building Investigation:

• Detectable concentrations of lead were identified by laboratory analysis in cream coloured paint chip samples taken from two (2) areas of the metal roof deck within the classrooms of the building on April 26, 2012;

• Asbestos-containing pipe fittings were observed to be i n fair-to-poor condition in the gymnasium and vulnerable to further disturbance.

Stantec recommends the following actions as a result of our study:

1. Mitigate potential for vapours and water to enter through the building envelope by sealing of potential pathways.

2. Conduct mould remediation in accordance with recommendations provided by the Canadian Construction Association in their document titled “Mould Guidelines for the Canadian Construction Industry” (2004). Stantec’s Final Report: Intrusive Mould Investigation – Highland Consolidated Middle School, dated November 5, 2012, should be us ed as reference as it contains more detailed information regarding the delineation of mould/water damage impacts at the HCMS.

3. Ensure information pertaining to hazardous materials in HCMS is available to Stantec and other contractors prior to remedial repair work. Repair asbestos-containing materials identified as being in fair-to-poor condition within the gymnasium prior to re-occupancy.

4. Conduct remedial work on pai nt applications containing any concentration of lead (i.e., painted roof deck) in such a m anner so as to avoid generating fine particulate matter or dust (i.e., avoid sanding).


File: 121411939 iv November 2, 2012

Table of Contents EXECUTIVE SUMMARY E.1

1.0 INTRODUCTION ............................................................................................................ 1 1.1 GENERAL ...................................................................................................................... 1 1.2 BACKGROUND .............................................................................................................. 1 1.3 LIMITATIONS ................................................................................................................. 1 1.4 PERFORMED SCOPES OF WORK ............................................................................... 2

2.0 INVESTIGATIVE METHODOLOGY ............................................................................... 3

3.0 RESULTS AND DISCUSSION ....................................................................................... 6 3.1 BUILDING INVESTIGATION (APRIL 26, 2012) .............................................................. 6

3.1.1 Roof Pathway Investigation .................................................................................. 6 3.1.1.1 TVOC Air Sampling .............................................................................................. 6 3.1.1.2 TVOC Direct Reading ........................................................................................... 7

3.1.2 Mould Assessment ............................................................................................... 9 3.1.3 General Building Assessment..............................................................................10

3.2 BUILDING INVESTIGATION (MAY 24, 2012) ...............................................................11 3.3 EXTERIOR CLADDING REMOVAL (JULY 17, 2012) ....................................................13 3.1 EXTERIOR CLADDING REMOVAL AND BUILDING INVESTIGATION (AUGUST 24,

2012) 13

4.0 CONCLUSIONS AND RECOMMENDATIONS .............................................................14

5.0 CLOSURE .....................................................................................................................16 LIST OF TABLES Table 1 TVOC Sample Information, HCMS April 26, 2012 ........................................................... 6 Table 2 Multi-Sorbant Tube TVOC Results, HCMS April 26, 2012 ............................................... 7 Table 3 Spot Measurements – TVOCs, HCMS April 26, 2012 ..................................................... 8 Table 4 Baseline Mould Assessment Results, HCMS April 26, 2012 ......................................... 10 Table 5 Paint Chip Sampling, HCMS April 26, 2012 .................................................................. 11 Table 6 Building Investigation Findings, HCMS, May 24, 2012 .................................................. 11 Table 7 Mould Bulk & Tape-lift Sample Test Results, HCMS, May 24, 2012 .............................. 13 Table 8 Exterior Cladding Removal Findings, HCMS, July 17, 2012 .......................................... 13 Table 9 Exterior Cladding Removal and Building Investigation Findings, HCMS, July 17,

2012 .............................................................................................................. 14


File: 121411939 v November 2, 2012

LIST OF APPENDICIES APPENDIX A Bulk Sample Location Floor Plan APPENDIX B TVOC Direct Readings Floor Plan APPENDIX C Laboratory Analytical Report: TVOC APPENDIX D Laboratory Analytical Report: Mould Air APPENDIX E Laboratory Analytical Report: Lead APPENDIX F Laboratory Analytical Report: Mould Bulk & Tape Lift APPENDIX G Site Specific Photographs


File: 121411939 1 November 2, 2012

1.0 Introduction

1.1 GENERAL

Stantec Consulting Ltd. (Stantec) was retained by the Chignecto-Central Regional School Board (CCRSB) to conduct an investigation for potential vapour and water pathways in the building envelope at the Highland Consolidated Middle School (HCMS), located in Westville, Nova Scotia. The site visit was a follow-up to the odour investigation at Highland Consolidated Middle School conducted between January 17 and March 16, 2012, where several staff members had reported health concerns that they correlated with various odours detected in the school.

1.2 BACKGROUND

CCRSB has undertaken an ex tensive investigation to address the odour concerns at HCMS since they were first reported in March 2011 following a partial roof replacement at the school. Several actions have been taken, with the most recent being the completion of the roof replacement in March 2012.

Based on escalated health complaints by school staff members following the roof replacement at HCMS in March 2012, the CCRSB made the decision to close the school on or about April 16, 2012 to further investigate the source of odour.

This report should be r ead in conjunction with Stantec’s Final Report: Odour Investigation – Highland Consolidated Middle School, dated April 20, 2012, and S tantec’s Final Report: Intrusive Mould Investigation – Highland Consolidated Middle School, dated November 5, 2012.

1.3 LIMITATIONS

The information and observations contained within this report are based on visual assessments of the readily-accessible interior and exterior surfaces of the building (i.e., walls, ceilings, and floors) and in ceiling and wall cavities where intrusive assessments were conducted. Information obtained during the investigation may not be extrapolated to areas of the building not assessed during the investigation.

This assessment does not constitute a building envelope/building systems assessment, which would include an i ntrusive investigation to assess the internal condition, potential moisture sources, and expected remaining service life of the various components and systems comprising the envelope of a building.


File: 121411939 2 November 2, 2012

The air samples collected provide a limited sampling of the air in a subject area. The conclusions given in this report are based on data obtained during the sampling events on April 26, 2012, and can only be extrapolated to an undefined limited area surrounding the sampling locations.

The lead paint sampling was at the request of the CCRSB. The subject area of concern was the roof deck of the second floor in the classrooms. Other areas of the school were not assessed for the occurrence of lead-containing materials.

1.4 PERFORMED SCOPES OF WORK

Stantec conducted the following scopes of work:

April 26, 2012 Building Investigation

• Reviewed available information pertaining to indoor air quality at HCMS.

• Collected three (3) TVOC air samples from selected locations, including an outdoor sample, to identify compounds in air;

• Collected spot measurements of key indicators of indoor air quality at selected locations in HCMS;

• Conducted a visual assessment of readily accessible areas in HCMS to assess the building envelope for sources of odour;

• Conducted a v isual assessment of selected areas of concern to evaluate the presence of water impacts on building materials and to attempt to identify sources of moisture intrusion;

• Collected 8 mould air samples from selected rooms of the building for subsequent laboratory analysis to detect the possible presence of mould and establish baseline values for future mould abatement;

• Collected paint chip samples from roof deck for lead analysis; and

• Provided this detailed written report documenting our findings.

May 24, 2012 Building Pathway Investigation

• Reviewed available information pertaining to indoor air quality at HCMS.

• Perform a room-by-room visual assessment of areas along the exterior walls to determine where there is a potential for roof vapour ingress into the classrooms;

• Use of a boroscope to identify areas around the roof deck and parapet that may be of concern; and,

• Collected three (3) bulk samples and one (1) tape lift sample for mould analysis using direct microscopy.


File: 121411939 3 November 2, 2012

July 17, 2012 Exterior Cladding Removal

• Visually observe the removal of the exterior cladding on the northwest (front) of the HCMS outside of rooms 218 and 120 for potential concerns regarding the potential for vapour and water pathways in the exterior wall assembly; and,

• Use of a moisture meter to determine if materials in the wall assembly are been impacted by water.

August 24, 2012 Exterior Cladding Removal and Building Investigation

• Visually observe the removal of the exterior cladding on the southeast (rear) of the HCMS outside of rooms 215, 119 and room 101 for potential concerns regarding the potential for vapour and water pathways in the exterior wall assembly;

• Use of a moisture meter to determine if materials in the wall assembly are been impacted by water; and,

• Perform a room-by-room visual assessment of areas in the main floor south wing to determine where there is a potential for roof vapour ingress into the classrooms.

2.0 Investigative Methodology

April 26, 2012 Building Investigation

Stantec carried out an assessment of potential off-gassing produced by the curing process of new roofing materials on April 26, 2012. Reported renovations at HCMS include a partial roof replacement in March 2011; and the completion of the roof replacement in March 2012.

The purpose of the roof investigation was to assess and i dentify total volatile organic compounds (TVOCs) present in the indoor environment relative to outdoors and attempt to correlate the results with Material Safety Data Sheets (MSDS) from the new roofing materials.

Air samples for TVOC’s were collected on solid multi-sorbent media using constant flow air sampling pumps, calibrated before and after sampling. Samples were analysed semi-quantitatively for total volatile organic compounds using thermal desorption followed by gas chromatography/mass spectrometry (GC/MS). The analysis was conducted by Cassen Testing Laboratories (Cassen) of Etobicoke, Ontario. This methodology is consistent with EPA Method IP-1B, Determination of Volatile Organic Compounds in Indoor Air using Solid Adsorbent Tubes. A report detailing the characterization of compounds analyzed in the samples was also provided.


File: 121411939 4 November 2, 2012

An assessment of potential pathways for air movement in the roof deck was performed. A photoionization detector (PID), the ppbRAE manufactured by RAE Systems, Model PGM 7240, was used to take direct readings of TVOCs in selected areas of the subject building.

The Health Canada standard for TVOCs is a target level of 0.4 ppm and an action level of 2.2 ppm. The action level standard refers to taking note and investigating further into the cause of elevated TVOCs.

Stantec conducted a v isual assessment of the initial mould abatement conducted by the CCRSB following the closure of HCMS. Readily accessible areas were also visually assessed to check for issues related to the integrity of the building envelope, with attention to signs of water staining/damage, areas of possible water and m oisture intrusion, and any areas of staining suggesting apparent mould growth.

Mould air sampling was conducted at the subject building. The purpose of sampling was to establish baseline values for mould in air prior to the continuation of mould abatement. High volume pumps calibrated at 15 litres per minute (LPM) were used to collect the spore trap samples in selected areas over a 5 minute period.

Air samples were submitted to Sporometrics, Inc. in Toronto, Ontario for analysis. Sporometrics is accredited by the American Industrial Hygiene Association (AIHA) for Environmental Microbiology Proficiency Analytical Testing (EMPAT) (Reference No. 171117).

Air quality instruments used to aid in the mould assessment were the TSI 8525 P-Trak Ultrafine Particle Counter and the TSI Q-Trak Model 8551.

The subject building is a detached structure with two (2) storeys and partial basement below the gymnasium. The roof is flat. The walls are constructed of concrete brick under metal siding. The building was reportedly constructed in 1966. The interior wall surfaces of the building are only partially finished with drywall. T he exterior walls on t he front side of the building are finished with drywall and the exterior walls on the back side of the building are not. Other interior finishes include vinyl tiled flooring and metal Q-deck ceilings, only some of which are finished with drywall.

Reported renovations on the subject building include new siding in 2002 and new windows in late 1990’s.

At the request of CCRSB, Stantec collected paint chip samples to be analyzed for lead content. As part of our routine evaluation of building materials and structures, Stantec also made a note of areas where asbestos containing materials may be present. It was reported by CCRSB that a Hazardous Materials Assessment had previously been conducted at HCMS.

Samples of representative paint applications were submitted to Maxxam Analytics (Maxxam) located in Bedford, Nova Scotia for lead content analysis by Inductively Coupled Plasma Mass Spectrometry (ICP-MS), following U.S. EPA Method No. 6020A.


File: 121411939 5 November 2, 2012

May 24, 2012 Building Pathway Investigation

The visit was prompted by the site assessment on April 26, 2012, and focused on identifying potential pathways for vapours/odours from roofing materials to migrate into classrooms. Boroscope capable of taking pictures and videos was used to identify areas in the wall systems that were otherwise not accessible.

A visual assessment for mould was performed. Areas of drywall were removed by CCRSB staff to allow Stantec to assess potentially water damaged materials. Bulk samples and tape lift samples of mould were taken and sent to Mycotaxon Consulting Ltd., Halifax, NS. Mycotaxon produces data that is of sufficient quality for Canada Mortgage and Housing Corporation (CMHC), Health Canada and Public Works and Government Services (PWGSC) for the analysis of mold and biological contaminants. Mycotaxon Consulting Limited is a par ticipant in the American Industrial Hygiene Association's Environmental Microbiology Proficiency Analytical Testing (EMPAT) programs.

July 17, 2012 Exterior Cladding Removal

The site visit was prompted by the site assessment on May 24, 2012, that found large mould-impacted/water damaged areas within the exterior wall cavities on 2nd floor of the northeast (front) of the HCMS. The CCRSB and C.J. MacLellan & Associates (CJMac) hired contractors to erect scaffolding and remove the exterior cladding in order to observe the condition of materials in the exterior wall assembly for potential mould and water damage.

August 24, 2012 Exterior Cladding Removal and Building Investigation

The site visit was prompted by the site assessment on May 24, and July 17, 2012, that found large mould-impacted/water damaged areas within the exterior wall cavities on 2nd floor of the northeast (front) of the HCMS and similar impacts to the exterior sheathing caused by several deficiencies. The CCRSB and CJMac hired contractors to erect scaffolding and remove the exterior cladding in order to observe the condition of materials in the exterior wall assembly for potential mould and water damage.

The previous site visits also prompted an assessment of the main floor southeast wing of the HCMS for vapour and water pathways in the building envelope that may be contributing to the odour issue.


File: 121411939 6 November 2, 2012

3.0 Results and Discussion

3.1 BUILDING INVESTIGATION (APRIL 26, 2012)

3.1.1 Roof Pathway Investigation

Total volatile organic compounds (TVOCs) are generally considered to be organic compounds that have boiling points roughly in the range of 50 to 250°C. There are several thousand chemicals, synthetic and nat ural, that can be called TVOCs. O f these, over 900 hav e been identified in indoor air, with over 250 r ecorded at concentrations higher than 0.001 ppm. Identification and measurement of individual VOCs are expensive and t ime-consuming, and invariably the total is underestimated because the VOCs present at very low concentrations are difficult to identify and measure. The concept of total volatile organic compounds was therefore developed to deal with this situation.

Tremco roofing products included FAS-n-FREE® Adhesive, Trem-LAR® LRM-V and BURmastic® Adhesive. This information was provided to the analytical laboratory to assist in characterization of VOCs.

The windows within HCMS were closed on t he day of the assessment which would have reduced fresh air flow and therefore intensified the odours present within.

3.1.1.1 TVOC Air Sampling

The sampling information and l ocation of stations is outlined in Table 1. The location of the sampling stations is provided on the floor plans in Appendix A.

Table 1 TVOC Sample Information, HCMS April 26, 2012 Sample ID Location Total

Volume [L] Total Time

[min] Laboratory Reference

Pump ID

HCS-LOC1 Upper Floor north end hallway – above suspended ceiling in flute cavity 12.3 246 1024952 585400

HCS-LOC2 Upper Floor Room 203 11.7 240 1024396 944029 HCS-LOC3 Outdoor Reference 12.1 240 1024457 044130

The test results of the roof investigation for TVOCs at each location are presented in Table 2. A copy of the laboratory report is provided in Appendix C.


File: 121411939 7 November 2, 2012

Table 2 Multi-Sorbant Tube TVOC Results, HCMS April 26, 2012

Sample ID/ Location Top Three VOCs Identified

Compound Concentration

[ppm]

TLV Standards

[ppm]

TVOC Concentration

[ppm]*

HCS-LOC1/ Flute cavity

1. Pentane 1.40 600 25 2. Butane, 2-methyl- 1.40 Not established

(NE) 3. Octane, 2,6-dimethyl- 0.29

HCS-LOC2/ Room 203

1. Isopropyl Alcohol 0.15 200 1.9 2. Decane 0.047 NE

3. Acetic acid 0.10 10

HCS-LOC3/ Outdoors

1. Dichlorodifluoromethane <0.001 1000 0.001 2. Carbon Tetrachloride <0.001 5

3. Trichloromonofluoromethane <0.001 1000

* Comfort Guidelines for TVOCs: Target Level of 0.4 ppm and Action Level of 2.2 ppm

A characterization report was produced by Cassen Laboratories to summarize the results found from the TVOC testing. Their conclusions after identifying the top 35 TVOC compounds found in each sample are reprised below:

• TVOC results were 0.001 ppm in the outdoor sample (HCS-LOC3), 1.9 ppm in Room 203 (HCS-LOC2) and 25 pp m in the flute cavity of the upper floor north end hallway (HCS-LOC1);

• No association was made between TVOC compounds in the indoor and outdoor samples. The doors and windows had been closed in the school for 3 days prior to the assessment;

• Location HCS-LOC1 contained elevated levels of TVOCs as identified by laboratory analysis. After reviewing the Material Safety Data Sheets (MSDS) from the Tremco products used in the recent roof replacement, the compounds detected in HCS-LOC1 were believed to likely originate from this source;

• Location HCS-LOC2 contained relatively high levels of TVOCs as identified by laboratory analysis. Many of the top 35 TVOC compounds found in this sample were similar to those found in HCS-LOC1, suggesting that the products used in the recent roof replacement were migrating into the classroom areas.

The results of the top 35 compounds found in each sample along with the Summary of Results report produced by the laboratory are located in Appendix C.

3.1.1.2 TVOC Direct Reading

TVOCs were measured using a di rect-reading instrument to assist in identifying potential pathways for the odour. The results of the direct reading are presented in Table 3. A floor plan mapping the results is located in Appendix B.


File: 121411939 8 November 2, 2012

Table 3 Spot Measurements – TVOCs, HCMS April 26, 2012 Time

[hh:mm] Location Concentration [ppm] Conditions

13:50 Outdoor Reference 0.055 • Sunny with cloudy periods, 17.8 deg Celcius, 36.8% Relative Humidity

14:52 Basement, Locker room 0.207 • Dirty floor and shower 13:55 Main Floor, North Hallway 0.294

14:00 Main Floor, Middle Hallway 0.125 • Faint odour of gym mats stored in south portion of hallway

14:03 Main Floor, South Hallway 0.149 • Odour of gym mats stored in area

14:47 Main Floor, North Gymnasium 0.206

14:48 Main Floor, South Gymnasium 0.250

15:03 Main Floor, Room 113 0.240 • Chemical odour noted, likely from detergents and solvents being stored in room

15:09 Main Floor, East Wing Outside Room 140 0.149

15:11 Main Floor, East Wing Hallway 0.121

14:05 Upper Floor, South Hallway 0.467 14:27 Upper Floor, Middle Hallway 0.557 14:42 Upper Floor, North Hallway 0.487

14:08 Upper Floor, Room 220 1.955 • Chemical odour noted; windows closed


14:14 Upper Floor, Room 217 0.791 • Windows closed








14:28 Upper Floor, Room 206 0.421 • Musty odour noted; windows closed

14:32 Upper Floor, Middle Stairwell 0.280 • Stale air




14:43 Upper Floor, Room 200 0.416 • Windows closed Standard 0.4 (2.2) --


File: 121411939 9 November 2, 2012

Potential pathways for air flow were observed in Rooms 220 and 218 on the upper floor at the wall/roof deck joint. An approximate 4 inch to 6 inch gap was observed along this joint, exposing fiberglass insulation in some areas. It was reported by the CCRSB that metal flashing was used indoors to seal a similar gap in Rooms 216 and 214. A photo showing the wall/roof deck gap is located in Appendix G.

The gap is believed to be a pot ential pathway for vapours and w ater to enter the indoor environment. By mapping the TVOC direct reading results, it is apparent that the highest readings on the day of the assessment were in the south end of the upper floor where the deficiency was observed. It should be noted that the wind direction on this particular day was blowing from the southwest, which would push air inside of the building on the south side, therefore supporting these findings.

Numerous holes in the flutes of the metal roof deck were observed throughout the upper floor of HCMS. The holes are associated with the rusting of welds in the roof deck attachment to the parallel chord metal roof trusses. These holes are also believed to be a potential pathway for vapours and water to intrude into the indoor environment. A photo showing the deficiency is located in Appendix G.

The average indoor air temperature inside HCMS on t he day of the assessment was 23.0 degree Celsius. The average outdoor temperature was 17.0 degrees Celsius. During the assessment, it was observed that no windows were open in any of the rooms and all doors were shut. The result was the absence of fresh air inside the building and relatively high relative humidity levels. Because of the warm temperatures inside of the building compared to outside temperatures, cold air would have been drawn into the building due to the pressure differential. This is known as the “stack effect”, which occurs due t o a di fference in indoor-to-outdoor air density resulting from temperature and moisture differences.

3.1.2 Mould Assessment

The results of the air testing for mould are summarized in Table 4.

It is necessary to be cautious in interpreting air sampling results since any one sample is only a “snapshot” in time and fluctuations of concentrations and s pecies over time may be considerable. The locations of the spore trap sampling stations are located in Appendix A. The analytical laboratory report is located in Appendix D.


File: 121411939 10 November 2, 2012

Table 4 Baseline Mould Assessment Results, HCMS April 26, 2012

Sample No. Location Non-Viable Mould Possible

Concern Concentration Anomalous Species Spores/m3 In>Out

HCS-ST-206 Upper Floor Room 206 8 No Cladosporium NOS (2)

Hyphal fragments, pigmented (1)

No

HCS-ST-204 Upper Floor Room 204 14 No None No



HCS-ST-174 Main Floor Room 174 29 No Epicoccum NOS (tr)

Unknown amerospores, pigmented, globose

No

HCS-ST-HC Main Floor Cafeteria Hallway 6 No None No

HCS-ST-HALL Main Floor Hallway outside Room 113 55 No Hyphal fragments,

pigmented No

HCS-ST-OR Outdoors 108 Reference

While the air sample results do not indicate that mould amplifiers are present in the building, the visual assessment suggests otherwise. Indications of water intrusion in the building are similar to past findings, which include blistering and pe eling paint, water damaged drywall and j oint compounds, stained ceiling tiles and water-damaged windows and window sills.

A limited exterior building envelope assessment was performed. The following deficiencies were noted during the assessment:

• Exterior corrugated metal siding has numerous deficiencies allowing for water to seep into the building envelope;

• Exterior window caulking on several windows on the north side of HCMS is in poor condition, with cracking allowing for potential water intrusion; and

• Flashing observed in several windows on the east side of the building has been installed in a way that is allowing water to seep inside the window cavity.

3.1.3 General Building Assessment

Prior to beginning a construction or demolition/renovation project, it is necessary to ensure that hazardous substances are not present and therefore potentially released by the work activity.

At the request of the CCRSB, Stantec collected two (2) paint chip samples from HCMS for lead content analysis. The samples were taken from the roof deck, one (1) in Room 201 and one (1) in Room 220.


File: 121411939 11 November 2, 2012

The sample results are located in Table 5. The locations of the samples are located on the floor plans provided in Appendix A. The laboratory certificate for the paint chip samples is provided in Appendix E.

Table 5 Paint Chip Sampling, HCMS April 26, 2012 Sample ID Location Description Result (ppm) PS-R220 Upper Floor Room 220 Cream paint taken on roof deck 890 PS-R220 (Lab-Dup) -- -- 900 PS-R201 Upper Floor Room 201 Cream paint taken on roof deck 850

Based on the laboratory results, the samples contained detectable lead concentrations; however, they are below the 1,000 ppm limit set by the Nova Scotia Labour and Advanced Education (NSLAE) guideline for lead-containing materials. The paint was observed on corrugated roof deck in all of the classrooms on the upper floor. The paint in most of these rooms was observed to be in fair-to-poor condition at the time of the assessment.

Asbestos-containing pipe fittings were observed to be in fair-to-poor condition in the gymnasium during the site assessment. Undisturbed, these fittings pose no threat to human health, however, it was noted by the assessors that the location of the pipe fittings next to the basketball nets surrounding the perimeter walls makes them more vulnerable to disturbance when the building is occupied. Photos of the asbestos-containing fittings are located in Appendix G. The location of the pipe fittings are outlined in the floor plans in Appendix A.

3.2 BUILDING INVESTIGATION (MAY 24, 2012)

The findings from the visual investigation of the readily accessible interior surfaces of the building are presented in Table 6. Site selected photographs are located in Appendix G.

Table 6 Building Investigation Findings, HCMS, May 24, 2012

Location Observations

Room 201

• Black tar compound observed in flute area at the exterior wall joint. The tar compound was on the back side of a foam air-flow stopper and on the wood stud at the parapet.

• Not all flutes were observed to have a foam air-flow stopper.

Northern Stairwell

• Black tar compound observed at the end of the flute at the exterior wall. • Draft observed in northeastern exterior wall corner at the roof deck. • Water staining was observed on wood stud at parapet. • Vertical crack continuous to the exterior (outdoors) was observed in southeastern

corner of the concrete block wall. Room 203 • Water staining observed on wood stud at parapet

Room 204 • Exterior drywall wall removed to expose envelope. Apparent mould observed on plywood wall. Water staining observed on plywood wall.

Room 206

• Fiberglass insulation is being used to fill gap between structural steel I-beam and metal roof deck along exterior wall. Flashing was used to conceal gap.

• Portion of drywall wall at window base removed from previous mould abatement exposing wall cavity. Area was re-insulated and sealed with poly. No water-staining noted.


File: 121411939 12 November 2, 2012

Table 6 Building Investigation Findings, HCMS, May 24, 2012

Location Observations

Room 208

• T-bar suspended ceiling observed in room with fiberglass/vinyl ceiling tiles • Black tar compound observed leaking through holes in flutes and from I-beam

along the perimeter. • There is a gap between the roof deck and the wood studded support at the

parapet which is exposing the thermal layer of the roof membrane.

Room 220

• Fiberglass insulation is being used to fill gap between structural steel I-beam and metal roof deck along exterior wall. Black tar compound was observed on the wood studs at the parapet.

• Strong draft observed inside wall cavity behind concrete block wall. • Black tar compound observed in flute area at the exterior wall joint. The tar

compound was on the back side of a foam air-flow stopper and on the wood stud at the parapet.

• Not all flutes were observed to have a foam air-flow stopper.

Room 218

• Rusted steel I-beam observed along perimeter. • Building maintenance staff had recently removed a portion of exterior drywall wall

to expose the envelope and window framing. Apparent mould (black staining) was observed on the window header,

window base and plywood wall. Bulk samples were taken from would for mould analysis (MBS#1 and

MBS#2) A tape-lift sample was taken from the plywood wall for mould analysis

(TMS#1) Drywall removed from the wall was placed by building maintenance staff in

clear garbage bags. A bulk sample from apparent mould on the drywall paper backing was taken for mould analysis (MBS#3)

The window header was observed to be water soaked and rotted • Apparent mould and water staining was observed to be impacting building

materials at the floor level and possibly into room spaces below.

Room 216

• Building maintenance staff had recently removed a portion of exterior drywall wall to expose the envelope and window framing. Apparent mould (black staining) was observed on the window header and

plywood wall. A strong draft was observed in the wall cavity at the roof deck. A gap in the envelope to the exterior of the building was observed at the

concrete block/sheet metal siding.

Main floor south wing • No sources of odours were observed that may be contributing to conditions indoors.

Deficiencies in the roof system were evident by the presence of water stains on wood at the parapet in various locations of the HCMS. This information together with drafts noted at the roof deck/wall joint provide evidence that pathways for vapour and water to enter the building envelope exist.

During the building investigation, apparent mould was exposed within the wall cavity of Room 218. The drywall had been removed by building maintenance staff prior to Stantec’s site visit. The mould impacted area consisted of the interior surfaces of the exterior wood framed wall that supported corrugated sheet metal siding, including window frames. The deficiencies with regard to the exterior envelope that led to water intrusion in Room 218 were observed in other areas of the building where the sheet metal siding was installed.


File: 121411939 13 November 2, 2012

Bulk samples for mould were taken at the HCMS during the investigation. The results of the bulk sample testing for mould are summarized in Table 7. The laboratory certificate for the mould samples is provided in Appendix F.

Table 7 Mould Bulk & Tape-lift Sample Test Results, HCMS, May 24, 2012

Sample Number Location Species Identified Fungal Growth

MBS#1 Upper floor, Room 218 Cladosporium sp. colonies Active mould growth MBS#2 Upper floor, Room 218 Cladosporium sp. colonies Active mould growth

MBS#3 Upper floor, Room 218 Stachybotrys sp. colonies Aspergillus/Penicillium-like spores (heavy) Active mould growth

TMS#1 Upper floor, Room 218 Cladosporium sp. colonies Active mould growth 1 Aspergillus/Penicillium-like spores may include those of Acremonium, Paecilomyces and Trichoderma

3.3 EXTERIOR CLADDING REMOVAL (JULY 17, 2012)

Contractors were on site to remove corrugated metal panels of exterior cladding on the northwest side (front) of the HCMS. The panels were removed to expose the exterior wall assembly. A moisture meter was used to assess the potential for water-impacted areas.

The findings from the visual investigation of the accessible exterior surfaces of the building are presented in Table 8. Site selected photographs are located in Appendix G.

Table 8 Exterior Cladding Removal Findings, HCMS, July 17, 2012 Location Observations

Northwest side cladding removal (front of school) – Outside of rooms 218 and 120

• Black staining observed on exterior sheathing (apparent mould). Levels of moisture were detected in areas were water staining was

observed. • Water staining observed on exterior sheathing.

Levels of moisture were detected in areas were water staining was observed.

• Tears observed in Tyvec vapour barrier. • Rusting nails in exterior sheathing observed. • Brick façade adjacent to sheathing had mortar in poor condition allowing for water

to impact wood. • Caulking around window flashing observed to be in poor condition and

contributing to water staining around windows. • Caulking between brick façade and exterior sheathing in poor condition. Gaps

were observed exposing wall cavity.

3.1 EXTERIOR CLADDING REMOVAL AND BUILDING INVESTIGATION (AUGUST 24, 2012)

Contractors were on site to remove corrugated metal panels of exterior cladding from two (2) locations on the southeast side (rear) of the HCMS. The panels were removed to expose the exterior wall assembly. A moisture meter was used to assess the potential for water-impacted


File: 121411939 14 November 2, 2012

areas. A visual assessment was also performed in the main floor southeast wing for potential concerns.

The findings from the visual investigation of the accessible exterior surfaces of the building are presented in Table 8. Site selected photographs are located in Appendix G.

Table 9 Exterior Cladding Removal and Building Investigation Findings, HCMS, July 17, 2012

Location Observations Southeast side cladding removal (rear of school) – Outside of rooms 215, 119 and 101

• Different building construction than the northwest side (front) of the HCMS. • No water staining or mould impacts observed. • No sources of odours were observed that may be contributing to conditions

indoors.

Main floor southeast wing • No water staining mould-impacted materials observed through the attic hatch

located above the custodial room. • No sources for potential pathways or odours observed in the subject space.

4.0 Conclusions and Recommendations

As a result of our findings, Stantec concludes the following.

Building Pathway Investigation:

• Potential pathway migration for vapours resulting from roofing materials (old and new) were identified in the wall/roof deck joints;

• Black tar compound, likely from the recent roof replacement, were observed to have seeped into ceiling/wall spaces around the perimeter of the roof deck in the upper floor;

• Multiple air-flow foam stoppers were missing from flutes at either end of building where wall meets roof deck;

• Black tar compound, likely from the recent roof replacement, were observed to have seeped into ceiling spaces through holes in the metal roof deck flutes in the upper floor;

• Air drafts were observed within wall cavities around the roof deck/wall joint in several rooms; • Cracks in concrete block walls were noted in the northern stairwell; • Gaps/spaces were observed between the exterior brick façade and metal sheet siding; and, • Potential pathway migration for vapours resulting from roofing materials (old and new) were

identified in roof deck flute holes caused by rusting and drilling; and,


File: 121411939 15 November 2, 2012

• Elevated levels of total volatile organic compounds (TVOCs) were found in the air sample collected on April 26, 2012, in Room 203 (1.9 ppm) and in the flute cavity of the upper floor north end hallway (25 ppm) relative to the sample collected outdoors (0.001 ppm). Of note is that the windows within the school had bee n closed for days prior to and dur ing the assessment, which would have intensified the odours within the building. The chemical compounds identified in the two (2) samples collected indoors (Room 203 and flute cavity of the upper floor, north end hallway) were believed to be similar in character to the Tremco roofing products used in the final phase of the roof replacement;

Mould Investigation:

• Mould amplifiers were not present in the building as interpreted from the laboratory analysis of eight (8) air samples taken on April 26, 2012;

• Three (3) bulk samples and one (1) tape lift sample of bulk materials were identified by laboratory analysis to support active mould growth (visible as black staining) impacting plywood sheathing and wood studs within the exterior wall cavity of Room 218 during the site visit on May 24, 2012;

• Black staining and w ater damage was observed on t he exterior sheathing following the removal of the corrugated metal pan cladding likely resulting from leaking windows, deficiencies in the brick façade mortar, caulking deficiencies around windows and from the former roof which had w as reported to have numerous leaks. These observations were determined to be only affecting the northwest side (front) of the HCMS. The southeast (rear) of the HCMS has a different building construction and was not impacted by either mould or water damage in the areas observed.

• Water staining was observed on wood studs in the parapet along the perimeter of the upper floor;

• Building deficiencies that allow for potential water intrusion were observed with exterior corrugated metal siding in some areas, exterior window caulking on the north side of the building, and flashing in several windows on the east side of the building; and,

• Active mould growth (visible as black staining) impacting plywood and wood studs was identified in Room 218. Sources of mould growth typically were related to building envelope deficiencies, such as: gaps observed between the exterior sheet metal siding and brick façade; poor condition of the window caulking; improperly installed sheet metal siding; and deficiencies around window cladding identified during a previous site visit.

Building Investigation:

• Detectable concentrations of lead were identified by laboratory analysis in cream coloured paint chip samples taken from two (2) areas of the metal roof deck within the classrooms of the building on April 26, 2012;


File: 121411939 16 November 2, 2012

• Asbestos-containing pipe fittings were observed to be i n fair-to-poor condition in the gymnasium and vulnerable to further disturbance.

Stantec recommends the following actions as a result of our study:

1. Mitigate potential for vapours and water to enter through the building envelope by sealing of potential pathways.

2. Conduct mould remediation in accordance with recommendations provided by the Canadian Construction Association in their document titled “Mould Guidelines for the Canadian Construction Industry” (2004). Stantec’s Final Report: Intrusive Mould Investigation – Highland Consolidated Middle School, dated November 5, 2012, should be us ed as reference as it contains more detailed information regarding the delineation of mould/water damage impacts at the HCMS.

3. Ensure information pertaining to hazardous materials in HCMS is available to Stantec and other contractors prior to remedial repair work. Repair asbestos-containing materials identified as being in fair-to-poor condition within the gymnasium prior to re-occupancy.

4. Conduct remedial work on pai nt applications containing any concentration of lead (i.e., painted roof deck) in such a manner so as to avoid generating fine particulate matter or dust (i.e., avoid sanding).

5.0 Closure

This report was prepared for the sole benefit of Chignecto-Central Regional School Board (CCRSB). This report cannot be used by any other person or entity without the express written consent of Stantec Consulting Ltd. and CCRSB.

Any use which a third party makes of this report, or any reliance on decisions made based on it, is the responsibility of such third parties. Stantec Consulting Ltd. accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report.

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 or medical advice.


File: 121411939 17 November 2, 2012

The conclusions presented in this report represent the best technical judgment of Stantec Consulting Ltd. based on the data obtained from the work. The conclusions are based on the site conditions encountered by Stantec Consulting Ltd. at the time the work was performed at the specific inspection and/or sampling locations, and can only be extrapolated to an undefined limited area around these locations. Due to the nature of the investigation and the limited data available, Stantec Consulting Ltd. cannot warrant against undiscovered environmental liabilities.

If any conditions become apparent that differ significantly from our understanding of conditions as presented in this report, we request that we be not ified immediately to reassess the conclusions provided herein.

We trust that the above is satisfactory for your purposes at this time. Should you have any questions or concerns, or require additional information, please do not hesitate to contact the undersigned at your convenience.

Yours sincerely,

STANTEC CONSULTING LTD.

Don Hartt, B.Sc., EPt Report Author

Pamela Sears, MHSc, BFA, CIH Industrial Hygienist

V:\1214\active\1214xxxxx\121411939 Chignecto School Board IAQ\Task 200.300 Additional Investigation\Final Report 2\HCMS Final Report2_2-Nov-2012.doc

FINAL REPORT – ODOUR INVESTIGATION HIGHLAND CONSOLIDATED MIDDLE SCHOOL

APPENDIX A Bulk Sample Location Floor Plan


APPENDIX B TVOC Direct Readings Floor Plan


APPENDIX C Laboratory Analytical Report: TVOC

Page 1 of 1

CASSEN Testing Laboratories, 51 International Blvd., Toronto, Ontario M9W 6H3 Tel: 416-679-9663 Fax: 416-679-9668 Toll Free 1-866-423-3001

CERTIFICATE OF ANALYSIS9

Major Volatile Organic Compounds Detected8

Rank1

CAS2

Number

Tentative Identification3

R.T. 4 (min)

Amount5

(ng)

Conc. 6

(ppb)

1 000109-66-0 Pentane 7.09 50000 1400 2 000078-78-4 Butane, 2-methyl- 6.44 50000 1400 3 002051-30-1 Octane, 2,6-dimethyl- 26.80 21000 290 4 002216-33-3 Octane, 3-methyl- 24.08 19000 300 5 017301-94-9 Nonane, 4-methyl- 27.81 19000 260 6 000106-42-3 m-Xylene + p-Xylene 25.26 17000 320 7 004551-51-3 1H-Indene, octahydro, cis- 26.94 16000 250 8 000124-18-5 Decane 28.99 15000 210 9 005911-04-6 Nonane, 3-methyl- 28.11 14000 190

10 003728-54-9 Cyclohexane, 1-ethyl-2-methyl- 25.48 14000 220 11 000111-84-2 Nonane 25.32 14000 210 12 015869-86-0 Octane, 4-ethyl- 27.57 13000 180 13 003073-66-3 Cyclohexane, 1,1,3-trimethyl- 23.03 13000 200 14 014676-29-0 Heptane, 3-ethyl-2-methyl- 27.14 12000 170 15 001678-92-8 Cyclohexane, propyl- 27.14 12000 200 16 002216-34-4 Octane, 4-methyl- 23.72 12000 180 17 000100-41-4 Ethylbenzene 24.85 12000 220 18 017302-28-2 Nonane, 2,6-dimethyl- 29.80 11000 140 19 000111-65-9 Octane 20.72 11000 190 20 000592-27-8 Heptane, 2-methyl- 19.02 10000 180 21 050876-32-9 Cyclohexane, 1,1,3,5-tetramethyl-, cis- 28.42 10000 140 22 000091-17-8 Naphthalene, decahydro- 31.81 9800 140 23 000095-47-6 o-Xylene 26.39 9100 170 24 007045-67-2 Cyclohexane, 2-ethyl-1,3-dimethyl- 25.76 9000 130 25 000871-83-0 Nonane, 2-methyl- 27.86 9000 130 26 001120-21-4 Undecane 31.91 8900 110 27 001678-91-7 Cyclohexane, ethyl- 22.86 8500 150 28 007058-05-1 Cyclohexane, 1-ethyl-2,3-dimethyl- 28.32 8300 120 29 000095-63-6 Benzene, 1,2,4-trimethyl- 29.99 7900 130 30 001839-63-0 Cyclohexane, 1,3,5-trimethyl- 23.72 7800 120 31 015869-95-1 4,4-Dimethyloctane 26.07 7600 110 32 000638-04-0 Cyclohexane, 1,3-dimethyl-, cis- 20.09 7500 130 33 006975-98-0 Decane, 2-methyl- 30.95 7200 92 34 000107-05-1 1-Propene, 3-chloro- 8.51 6800 180 35 015890-40-1 Cyclopentane, 1,2,3-trimethyl- 18.43 6800 120

Total Volatile Organic Compounds (TVOCs)7,8

Total Amount (ng)

Concentration (ppb)

TVOCs 1200000 25000 N.A.: Not Available Notes:

1) Rank is based on the descending order of concentration. 2) CAS Number is the Chemical Abstracts Service registry number corresponding to the tentatively identified compound (first listed coeluting compound) listed beside it. The tentative identification and its corresponding CAS

Number were obtained as the best possible match from the results of the NIST Mass Spectral Library search. 3) Tentative Identification is based on the best match result of the mass spectral identification; results are not confirmed unless calibrated with reference standards. 4) Retention Time (R.T.) is the time that the VOC eluted from the column in the chromatogram. 5) Amount is the semi-quantitative estimate of the total mass of the VOC in nanograms (ng) detected in the sampling tube. The value depends on the VOC’s response compared to selected reference compounds. 6) Concentration is the total amount of VOCs in parts per billion (ppb) of air. The air volumes used are those supplied to CASSEN Testing Laboratories. 7) TVOCs result is a semi-quantitative total amount/concentration based on the summation of the estimated masses of the VOC peaks in the chromatogram. The result depends on the response of each VOC compared to selected

reference compounds. 8) CASSEN Testing Laboratories has established a reporting policy that a maximum of three significant figures will be used for test results in compliance with the precision requirement of ISO 17025. 9) This Certificate of Analysis shall not be reproduced except in full, without written approval of the laboratory. These analytical results pertain only to the samples as received. No responsibility or liability is assumed for the

manner in which the results are used. Revision to test report 2504056 was applied as per the client’s request; concentrations reported in parts per billion (ppb). 10) Please note that this report is strictly focused on VOCs or compounds that are detectable using this method with a mass scanning range from 34 amu to 400 amu. Unstable/reactive compounds as well as those outside this

range can not be detected.

Analyst: _________________________ Date: _______________ Heather Turner, M.Sc. Chemist

CASSEN

Organization: Stantec Address: 102-40 Highfield Park Drive Dartmouth, NS B3A 0A3 Client: Pamela Sears Work Order No.: 2504056A Project Name: 121411939 Task 200.300 Analysis Required: Open Characterization Date Sampled: April 26, 2012 CASSEN Method: M.2401.R0 Date Submitted: April 30, 2012 GC/MS File: D37361.D Date Analyzed: May 02, 2012 Sample ID: HCS-LOC1 2nd floor in end hallway Sample Volume: 12.3 L

Page 1 of 1




Rank1

CAS2

Number


R.T. 4 (min)

Amount5

(ng)

Conc. 6

(ppb)

1 000067-63-0 Isopropyl Alcohol 8.69 4300 150 2 000124-18-5 Decane 28.92 3200 47 3 000064-19-7 Acetic acid 16.13 2900 100 4 000109-66-0 Pentane 7.15 2800 80 5 000075-68-3 Ethane, 1-chloro-1,1-difluoro- 4.71 2700 56 6 000075-71-8 Dichlorodifluoromethane 4.33 1900 33 7 000106-42-3 m-Xylene + p-Xylene 25.12 1800 35 8 000111-84-2 Nonane 25.16 1700 27 9 000111-76-2 Ethanol, 2-butoxy- 27.32 1600 28

10 001120-21-4 Undecane 31.86 1400 19 11 017302-28-2 Nonane, 2,6-dimethyl- 29.68 1300 18 12 000078-78-4 Butane, 2-methyl- 6.48 1200 36 13 000067-64-1 Acetone 8.35 1200 42 14 002051-30-1 Octane, 2,6-dimethyl- 26.62 1100 16 15 000064-17-5 Ethanol 7.44 1100 50 16 000095-63-6 Benzene, 1,2,4-trimethyl- 29.89 1100 19 17 017301-94-9 Nonane, 4-methyl- 27.63 1000 15 18 005911-04-6 Nonane, 3-methyl- 27.98 900 13 19 000541-02-6 Cyclopentasiloxane, decamethyl- 32.74 860 5 20 014676-29-0 Heptane, 3-ethyl-2-methyl- 27.03 850 12 21 000871-83-0 Nonane, 2-methyl- 27.70 810 12 22 006975-98-0 Decane, 2-methyl- 30.88 790 11 23 001074-43-7 Toluene, m-propyl- 31.47 750 12 24 000141-93-5 Benzene, 1,3-diethyl- 31.60 680 11 25 001678-92-8 Cyclohexane, propyl- 27.01 670 11 26 000111-65-9 Octane 20.61 660 12 27 000100-41-4 Ethylbenzene 24.76 620 12 28 000095-47-6 o-Xylene 26.29 610 12 29 013151-34-3 Decane, 3-methyl- 31.11 560 8 30 000066-25-1 Hexanal 22.40 510 11 31 002216-34-4 Octane, 4-methyl- 23.62 510 8 32 002216-33-3 Octane, 3-methyl- 23.98 500 8 33 000874-41-9 m-Xylene, 4-ethyl- 32.50 500 8 34 000526-73-8 Benzene, 1,2,3-trimethyl- 30.96 500 9 35 003073-66-3 Cyclohexane, 1,1,3-trimethyl- 22.94 500 8


Total Amount (ng)

Concentration (ppb)

TVOCs 84000 1900 N.A.: Not Available Notes:


Number were obtained as the best possible match from the results of the NIST Mass Spectral Library search. 3) Tentative Identification is based on the best match result of the mass spectral identification; results are not confirmed unless calibrated with reference standards. 4) Retention Time (R.T.) is the time that the VOC eluted from the column in the chromatogram. 5) Amount is the semi-quantitative estimate of the total mass of the VOC in nanograms (ng) detected in the sampling tube. The value depends on the VOC’s response compared to selected reference compounds. 6) Concentration is the total amount of VOCs in parts per billlion (ppb) of air. The air volumes used are those supplied to CASSEN Testing Laboratories. 7) TVOCs result is a semi-quantitative total amount/concentration based on the summation of the estimated masses of the VOC peaks in the chromatogram. The result depends on the response of each VOC compared to selected





CASSEN

Organization: Stantec Address: 102-40 Highfield Park Drive Dartmouth, NS B3A 0A3 Client: Pamela Sears Work Order No.: 2504056A Project Name: 121411939 Task 200.300 Analysis Required: Open Characterization Date Sampled: April 26, 2012 CASSEN Method: M.2401.R0 Date Submitted: April 30, 2012 GC/MS File: D37362.D Date Analyzed: May 02, 2012 Sample ID: HCS-LOC2 2nd floor room 203 Sample Volume: 11.7 L

Page 1 of 1




Rank1

CAS2

Number


R.T. 4 (min)

Amount5

(ng)

Conc. 6

(ppb)

1 000075-71-8 Dichlorodifluoromethane 4.31 10 <1 2 000056-23-5 Carbon Tetrachloride 14.50 8 <1 3 000075-69-4 Trichloromonofluoromethane 6.91 8 <1 4 000076-13-1 Ethane, 1,1,2-trichloro-1,2,2-trifluoro- 8.26 7 <1 5 000124-18-5 Decane 28.90 6 <1 6 000067-64-1 Acetone 8.38 5 <1 7 001120-21-4 Undecane 31.85 3 <1 8 000106-42-3 m-Xylene + p-Xylene 25.12 2 <1 9 000111-84-2 Nonane 25.15 2 <1

10 000109-66-0 Pentane 7.12 2 <1 11 000123-72-8 Butanal 12.29 2 <1 12 000095-63-6 Benzene, 1,2,4-trimethyl- 29.89 1 <1 13 000100-41-4 Ethylbenzene 24.77 1 <1 14 000108-88-3 Toluene 20.30 1 <1 15 000112-40-3 Dodecane 34.27 1 <1 16 000095-47-6 o-Xylene 26.29 1 <1 17 000078-79-5 1,3-Butadiene, 2-methyl- 7.71 1 <1 18 000108-67-8 Benzene, 1,3,5-trimethyl- 28.89 1 <1 19 000526-73-8 Benzene, 1,2,3-trimethyl- 30.96 1 <1 20 000111-65-9 Octane 20.60 1 <1 21 000622-96-8 Benzene, 1-ethyl-4-methyl- 28.75 < 1 <1 22 000103-65-1 Benzene, propyl- 28.44 < 1 <1 23 000127-18-4 Tetrachloroethylene 21.91 < 1 <1 24 000091-20-3 Naphthalene 35.94 < 1 <1


Total Amount (ng)

Concentration (ppb)

TVOCs 63 1

N.A.: Not Available Notes:


Number were obtained as the best possible match from the results of the NIST Mass Spectral Library search. 3) Tentative Identification is based on the best match result of the mass spectral identification; results are not confirmed unless calibrated with reference standards. 4) Retention Time (R.T.) is the time that the VOC eluted from the column in the chromatogram. 5) Amount is the semi-quantitative estimate of the total mass of the VOC in nanograms (ng) detected in the sampling tube. The value depends on the VOC’s response compared to selected reference compounds. 6) Concentration is the total amount of VOCs in parts per billion (ppb) of air. The air volumes used are those supplied to CASSEN Testing Laboratories. 7) TVOCs result is a semi-quantitative total amount/concentration based on the summation of the estimated masses of the VOC peaks in the chromatogram. The result depends on the response of each VOC compared to selected





CASSEN

Organization: Stantec Address: 102-40 Highfield Park Drive Dartmouth, NS B3A 0A3 Client: Pamela Sears Work Order No.: 2504056A Project Name: 121411939 Task 200.300 Analysis Required: Open Characterization Date Sampled: April 26, 2012 CASSEN Method: M.2401.R0 Date Submitted: April 30, 2012 GC/MS File: D37363.D Date Analyzed: May 02, 2012 Sample ID: HCS-LOC3 Outdoor Ref Sample Volume: 12.1 L

1

Summary of Results Work Order No. 2504056A - Stantec

Sample Name: HCS-LOC1 2nd floor in end hallway The total volatile organic compounds (TVOCs) concentration of this sample was found to be 25000 ppb. The top three VOCs identified in this sample are:

1. Pentane with a concentration of 1400 ppb 2. Butane, 2-methyl- with a concentration of 1400 ppb 3. Octane, 2,6-dimethyl- with a concentration of 290 ppb

The other major compounds found in this sample can be categorized into the following classes:

• Aliphatic hydrocarbons (Alkanes): [Pentane], [Butane, 2-methyl-], [Octane, 2,6-dimethyl-], [Octane, 3-methyl-], [Nonane, 4-methyl-], [Decane], [Nonane, 3-methyl-], [Nonane], [Octane, 4-ethyl-], [Heptane, 3-ethyl-2-methyl- ], [Octane, 4-methyl-], [Nonane, 2,6-dimethyl-], [Octane], [Heptane, 2-methyl-], [Cyclohexane, 2-ethyl-1,3-dimethyl-], [Nonane, 2-methyl-], [Undecane], [Cyclohexane, 1-ethyl-2,3-dimethyl-], [4,4-Dimethyloctane], [Decane, 2-methyl-]

• Aromatic hydrocarbons: [m-Xylene + p-Xylene], [Ethylbenzene], [o-Xylene], [Benzene, 1,2,4-trimethyl-]

• Halogenated Compounds: [1-Propene, 3-chloro-]

• Naphthenes (Cycloalkanes) and Benzo-Cycloalkanes: [1H-Indene, octahydro, cis-], [Cyclohexane, 1-ethyl-2-methyl-], [Cyclohexane, 1,1,3-trimethyl-], [Cyclohexane, propyl-], [Cyclohexane, 1,1,3,5-tetramethyl-, cis-], [Naphthalene, decahydro-], [Cyclohexane, ethyl-], [Cyclohexane, 1,3,5-trimethyl-], [Cyclohexane, 1,3-dimethyl-, cis-], [Cyclopentane, 1,2,3-trimethyl-]

Sample Name: HCS-LOC2 2nd floor room 203 The TVOCs concentration of this sample was found to be 1900 ppb. The top three VOCs identified in this sample are:

1. Isopropyl Alcohol with a concentration of 150 ppb 2. Decane with a concentration of 47 ppb 3. Acetic acid with a concentration of 100 ppb


• Alcohols: [Isopropyl Alcohol], [Ethanol]

• Aldehydes: [Hexanal]

• Aliphatic hydrocarbons (Alkanes): [Decane], [Pentane], [Nonane], [Undecane], [Nonane, 2,6-dimethyl-], [Butane, 2-methyl-], [Octane, 2,6-dimethyl-], [Nonane, 4-methyl-], [Nonane, 3-methyl-], [Heptane, 3-ethyl-2-methyl- ], [Nonane, 2-methyl-], [Decane, 2-methyl-], [Octane], [Decane, 3-methyl-], [Octane, 4-methyl-], [Octane, 3-methyl-]

• Aromatic hydrocarbons: [m-Xylene + p-Xylene], [Benzene, 1,2,4-trimethyl-], [Toluene, m-propyl-], [Benzene, 1,3-diethyl-], [Ethylbenzene], [o-Xylene], [m-Xylene, 4-ethyl-], [Benzene, 1,2,3-trimethyl-]

• Chlorofluorocarbons: [Ethane, 1-chloro-1,1-difluoro-], [Dichlorodifluoromethane]

• Glycols/Glycol Ethers: [Ethanol, 2-butoxy-]

• Ketones: [Acetone]

2

• Naphthenes (Cycloalkanes) and Benzo-Cycloalkanes: [Cyclohexane, propyl-], [Cyclohexane, 1,1,3-trimethyl-]

• Organic Acids: [Acetic acid]

• Siloxanes/Silanes: [Cyclopentasiloxane, decamethyl-]

Sample Name: HCS-LOC3 Outdoor Ref The TVOCs concentration of this sample was found to be 1 ppb. The top three VOCs identified in this sample are:

1. Dichlorodifluoromethane with a concentration of <1 ppb 2. Carbon Tetrachloride with a concentration of <1 ppb 3. Trichloromonofluoromethane with a concentration of <1 ppb


• Aldehydes: [Butanal]

• Aliphatic hydrocarbons (Alkanes): [Decane], [Undecane], [Nonane], [Pentane], [Dodecane], [Octane]

• Alkenes/ Conjugated Dienes: [1,3-Butadiene, 2-methyl-]

• Aromatic hydrocarbons: [m-Xylene + p-Xylene], [Benzene, 1,2,4-trimethyl-], [Ethylbenzene], [Toluene], [o-Xylene], [Benzene, 1,3,5-trimethyl-], [Benzene, 1,2,3-trimethyl-], [Benzene, 1-ethyl-4-methyl-], [Benzene, propyl-]

• Chlorofluorocarbons: [Dichlorodifluoromethane], [Trichloromonofluoromethane], [Ethane, 1,1,2-trichloro-1,2,2-trifluoro-]

• Halogenated Compounds: [Carbon Tetrachloride], [Tetrachloroethylene]

• Ketones: [Acetone]

• Polycyclic Hydrocarbons: [Naphthalene]

Comments and Conclusions Based on the results of analysis, some observations and comments are presented below:

1. The TVOC concentrations determined in these samples ranged from 1 ppb for the HCS-LOC3 sample to 25000 ppb for the HSC-LOC1 sample.

2. The HCS-LOC3 sample (collected outdoors as indicated in the submitted Sample Information Sheet) possessed the lowest TVOC

concentration at 1 ppb. Most of the compounds were detected at trace levels, which is typical of an outdoor environment. No similar VOC pattern was observed between the indoor and outdoor samples.

3. Sample HCS-LOC1, which was collected in the hallway inside the roof deck flute (as indicated on the submitted Sample

Information Sheet), possessed the highest concentration of TVOCs at 25000 ppb. This sample contained high levels of aliphatic hydrocarbons and cycloalkanes (naphthenes) as well as aromatic hydrocarbons. The detected compounds most likely originated from the products used during roof replacement. The Burmastic Adhesive contains asphalt and Stoddard solvent, while the Trem-Lar LRM-V contains aromatic process oil (as indicated in the MSDS for each product). These three components would likely emit aliphatic, naphthenic, and aromatic hydrocarbons. These three compound classes account for the majority of the detected compounds in this sample.

3

4. The HCS-LOC2 sample (collected in a classroom as indicated in the submitted Sample Information Sheet) also contained a relatively high TVOC concentration of 1900 ppb. Comparison of the roof and classroom samples could indicate that the aromatic and aliphatic hydrocarbons emitted from the roofing materials migrated into the classroom area. In addition to the roofing products, there are two other major sources for the chemicals detected in the classroom sample. Compounds such as isopropyl alcohol, acetic acid, ethanol, and 2-butoxyethanol could have originated from the cleaning products as well as hand sanitizers (ethanol) used in the classroom. The chlorofluorocarbons (CFCs) such as 1-chloro-1,1-difluoroethane and dichlorodifluoromethane may have been emitted by the HVAC and other refrigeration systems in the building as CFCs are often used as coolants.

5. Overall, the major source of the described chemical and musty odours was likely the roof replacement materials. If windows were

closed during the time of sample collection, the odour could have been intensified; increasing ventilation in the area is suggested.

6. The common sources, exposure limits, and odour description of individual compounds are presented in the next section. For your information, although currently there are no regulated indoor air quality guidelines for total volatile organic compounds (TVOCs) levels for non-industrial settings, some exposure limits have been recommended. These are listed below:

1. The European Collaborative Action Report 11: 'Guidelines for Ventilation Requirements in Buildings (CEC 1992)': a. Comfort range: <200 ug/m3 b. Multifactorial exposure range: 200 to 3,000 ug/m3 c. Discomfort range: 3,000 to 25,000 ug/m3 d. Toxic range: >25,000 ug/m3

2. Indoor Air Quality in Office Buildings: A Technical Guide – Health Canada (1995)

a. Target level: 1,000 ug/m3

3. Ministry of Health, Labour and Welfare (MHLW) IAQ Guidelines - Japan (2004)

a. Exposure guideline (Long term): 400 ug/m3

4. Indoor Air Quality Guideline – Germany (Umwelt Bundes Amt, 2005)

a. Exposure guideline (Long term average): 200 - 300 ug/m3

Possible Relevant Sources Common hydrocarbons without available threshold limit values (TLVs) are not listed. In general, the guideline limits of individual compounds for non-industrial indoor environments are set at 1/10 of the TLV limits. The conversion factor from mg/m3 to ug/m3 is 1000, i.e. 1 mg/m3 = 1000 ug/m3.

Common Sources: Alcohols

• Ethanol

Sources: Ethanol is used extensively as a solvent in the manufacturing of varnishes, ink, cleaners, detergents, and paint. It is used in perfumes, aftershave, and many personal care and pharmaceutical products. Ethanol is also used in disinfectants such as hand sanitizers and as a fuel and gasoline additive. TLV: N.A. STEL: 1000 ppm (1880 mg/m3) Odour: Sweet, alcoholic Odour Threshold: 49 - 716 ppm

• Isopropyl Alcohol Sources: Isopropyl alcohol is used as solvent for gums, in antifreeze products, shellac, essential oils, quick drying inks, and resins. It is also used in paints, rubbing alcohol, cleaners, personal care products, and as an antiseptic agent and disinfectant. TLV: 200 ppm (491 mg/m3) STEL: 400 ppm (983 mg/m3) Odour: Pleasant, sharp, rubbing alcohol Odour Threshold: 37 - 610 ppm

• 1-Propanol Sources: 1-Propanol is commonly used as a paint solvent, cleaning solvent for printing ink, and a solvent for flexography and other printing inks. Other minor uses include a solvent for coating for automotive, cosmetics, and personal care products. TLV: 100 ppm (246 mg/m3) Odour: Sweet, alcohol Odour Threshold: 0.031 ppm

4

Common Sources: Aldehydes

• Hexanal

Sources: Hexanal can be found from emissions of pressed wood products (hardwood plywood wall paneling, particle board, and fibreboard), furniture (composed of pressed wood), carpet, fabrics, adhesives, alkyd paint, and polyurethane wood finish. TLV: N.A. Odour: Pungent Odour Threshold: N.A.

• Acrolein Sources: Acrolein is formed in combustion from automobile exhaust, tobacco smoke, or other burning/heating processes. It is also used for the production of other chemicals and as a pesticide. TLV: N.A. STEL: C 0.1 ppm (0.23 mg/m3) Odour: Burnt, sweet Odour Threshold: 0.023 ppm

• Butanal Sources: Butanal is mainly used in the production of rubber accelerators, synthetic resins, solvents, and plasticizers. It is also formed during a burning/heating/combustion process. TLV: N.A. Odour: Sweet, rancid, pungent, nutty Odour Threshold: 0.0046 ppm

Common Sources: Aliphatic hydrocarbons are components of mixed solvent for varnishes, paint, paint removers, sheet vinyl flooring, coatings, printing inks, adhesives and degreasers. Aliphatic hydrocarbons are also ingredients of petrochemical fuels, solvents and lubricants such as gasoline, mineral spirit, naphtha and motor oil etc. Emissions from combustion also generate many hydrocarbons especially those of lower molecular weight.

Aliphatic hydrocarbons (Alkanes)

• Butane, 2-methyl-

TLV: 600 ppm (1770 mg/m3) Odour: Mild gasoline Odour Threshold: 400 ppm

• Pentane TLV: 600 ppm (1770 mg/m3), (Pentane, all isomers) Odour: Gasoline-like Odour Threshold: 2.2 ppm

• Hexane TLV: 50 ppm (176 mg/m3) Odour: Gasoline Odour Threshold: 65 ppm

• Octane TLV: 300 ppm (1400 mg/m3) Odour: Gasoline-like, oil Odour Threshold: 15 ppm

• Nonane TLV: (200 ppm) (1050 mg/m3) STEL: (—) Odour: Gasoline Odour Threshold: 654 ppm

• Dodecane TLV: N.A. Odour: Gasoline Odour Threshold: 5.2 ppm

• Decane TLV: N.A. Odour: Gasoline

5

Odour Threshold: 1.9 ppm

• Undecane TLV: N.A. Odour: Gasoline Odour Threshold: 1.2 ppm

Common Sources: Alkenes/ Conjugated Dienes

• 1,3-Butadiene, 2-methyl-

Sources: Also known as isoprene, this compound is a metabolite from human breath. It is also emitted by various types of plants, is the predominant VOC emitted by forest species, and is a component of synthetic rubber. TLV: N.A. Odour: Petroleum-like, aromatic Odour Threshold: 0.005 ppm

Common Sources: Aromatic hydrocarbons are used as solvents especially for paints, lacquers, coatings, gums, inks, adhesives, and resins. They are also used as raw material in the production of other materials, ingredients of petrochemical fuels, and emissions from burning, heating or combustion processes.

Aromatic hydrocarbons

• o-Xylene

TLV: 100 ppm (434 mg/m3), (Xylene; o, m & p isomers) STEL: 150 ppm (651 mg/m3), ( Xylene; o, m & p isomers) Odour: Aromatic Odour Threshold: 0.08 ppm

• Benzene, 1,2,4-trimethyl- TLV: 25 ppm (123 mg/m3), (Trimethylbenzene, mixed isomers) Odour: Aromatic Odour Threshold: 0.006 ppm

• Ethylbenzene TLV: 20 ppm (86.8 mg/m3) STEL: 125 ppm (543 mg/m3) Odour: Aromatic, oily, solventy Odour Threshold: 2 ppm

• Benzene, propyl- TLV: 50 ppm (245 mg/m3), (ACGIH suggested) Odour: N.A. Odour Threshold: N.A.

• Benzene, 1,3,5-trimethyl- TLV: 25 ppm (123 mg/m3), (Trimethylbenzene, mixed Isomers) Odour: Aromatic Odour Threshold: 0.24 ppm

• Toluene TLV: 20 ppm (75.4 mg/m3) Odour: Sweet, pungent Odour Threshold: 1.6 ppm

• Benzene, 1,3-diethyl- TLV: N.A. Odour: Aromatic Odour Threshold: N.A.

• Benzene, 1,2,3-trimethyl- TLV: 25 ppm (Trimethylbenzene, mixed isomers) (123 mg/m3) Odour: Sweet aromatic odour Odour Threshold: 0.4 ppm

• m-Xylene, 4-ethyl- TLV: N.A.

6

Odour: N.A. Odour Threshold: N.A.

Common Sources: Chlorofluorocarbons

• Ethane, 1-chloro-1,1-difluoro-

Sources: Also known as HCFC-142b, or R-142b, it is rarely used by itself; is generally a component of a refrigerant blend known as R-409A, which includes HCFC-22. HCFC-142b is also used for foam blowing and as a propellant in aerosol cans. TLV: N.A. Odour: Ethereal Odour Threshold:

• Trichloromonofluoromethane Sources: Also known as Freon-11, it was used extensively in the past but as a result of it’s potential in ozone depletion, many of its uses have become increasingly restricted or banned; however, the use of existing stocks is still permitted. Its major uses include coolants/refrigerants, blowing agent, degreasing agent, solvent, fire extinguishing agent, and aerosol propellant. TLV: N.A. STEL: C 1000 ppm (5620 mg/m3) Odour: Slightly Ethereal Odour Threshold: 5 ppm

• Dichlorodifluoromethane Sources: Dichlorodifluoromethane is found in coolants from air conditioners and refrigerators, propellants from aerosol cans, and can be used as a blowing agent for foams. TLV: 1000 ppm (4940 mg/m3) Odour: Ethereal Odour Threshold: N.A.

• Ethane, 1,1,2-trichloro-1,2,2-trifluoro- Sources: CFC-113 has been used as a solvent (degreasing and dry cleaning), refrigerant, heat transfer liquid, and chemical intermediate. TLV: 1000 ppm (7660 mg/m3) STEL: 1250 ppm (9580 mg/m3) Odour: Ethereal Odour Threshold: 0.5 ppm

Common Sources: Glycols/Glycol Ethers

• Ethanol, 2-butoxy-

Sources: The main use of 2-butoxyethanol is in paints and surface coatings such as spray lacquers, quick-dry lacquers, enamels, varnishes, varnish removers, inks, and latex paints and is widely used in many cleaning products. TLV: 20 ppm (97 mg/m3) Odour: Sweet, ester, musty Odour Threshold: 0.099 ppm

Common Sources: Halogenated Compounds

• Carbon Tetrachloride

Sources: Carbon tetrachloride is used in the production of refrigeration fluid and propellants for aerosol cans, as a pesticide, cleaning fluid and degreasing agent, solvent for varnishes and wood stains, and in fire extinguishers and spot removers. TLV: 5 ppm (31.5 mg/m3) STEL: 10 ppm (62.9 mg/m3) Odour: Sweet, chloroform, dry cleaner Odour Threshold: 140 - 584 ppm

• Methylene Chloride Sources: Methylene chloride is used as a degreaser and cleaner for metals, plastics, and silicon chips, as a drycleaner and spot remover, quick-drying agent (e.g. typewriter correction fluid) and is also used as a solvent in paints, varnish strippers, adhesives, print developing, and detergents. TLV: 50 ppm (174 mg/m3) Odour: Sweet

7

Odour Threshold: 152 ppm

• 1-Propene, 3-chloro- Sources: It is a colourless or pale yellow liquid and has a unpleasant, pungent odor. It is used in the synthesis of allyl compounds. TLV: 1 ppm (3.1 mg/m3) STEL: 2 ppm (6.3 mg/m3) Odour: Green, garlic, oniony Odour Threshold: 0.45 ppm

• Tetrachloroethylene Sources: Tetrachloroethylene is widely used in the textile industry for dry cleaning, processing, and finishing fabrics. It is also used in metal degreasers, spot removers, adhesives, wood cleaners, sealants, polishes, lubricants, and in smaller quantities used in rubber coatings, solvent soaps, and printing. TLV: 25 ppm (170 mg/m3) STEL: 100 ppm (678 mg/m3) Odour: Mildly sweet and ether-like odour Odour Threshold: 4.7 ppm

• Ethene, 1,2-dichloro-, (E)- Sources: It is used as a low-temperature extraction solvent for heat-sensitive substances (caffeine, perfume oils, and fats from fish and meat) and as a general solvent for rubber, waxes, oils, lacquers, resins, thermoplastics, artificial fibers, dyes, and other organics. It is also used as a dry-cleaning agent and a cleaning solution for printed circuit boards, food packaging adhesives, germicidal fumigants, and in retarding fermentation as well as in the manufacturing of pharmaceuticals. TLV: 200 ppm (790 mg/m3), (All isomers) Odour: Ether-like, slightly acrid Odour Threshold:

Common Sources: Heterocyclic Compounds

• Furan, 2-methyl-

Sources: It is a clear colourless liquid with an ethereal odour and naturally occurs in beef, bread, butter, chicken, mint, abd tea. It is used as a flavouring substance and an intermediate in chemical synthesis. TLV: N.A. Odour: Ethereal Odour Threshold: 27 ppm

Common Sources: Ketones

• Acetone

Sources: Acetone occurs in the nature as well as a man-made compound. It is used to produce other chemicals and as a solvent for surface coatings, inks, resins, varnishes, lacquers, carpet adhesive, thinners, cleaners, and automotive care products. It is formed in combustion processes. It occurs naturally in plants, trees, volcanic gases, forest fires, and as a product of the breakdown of body fat. It is present in exhaled breath, vehicle exhaust, tobacco smoke, and landfill sites. In indoor air, exhaled breath is a key contributor of acetone. TLV: (500 ppm) (1190 mg/m3) STEL: (750 ppm) (1780 mg/m3) Odour: Minty chemical, sweet Odour Threshold: 3.6 - 653 ppm

Common Sources: Naphthenes (Cycloalkanes) and Benzo-Cycloalkanes

• Naphthalene, decahydro-

Sources: Decahydronaphthalene is a solvent for naphthalene, fats, resins, oils, waxes, instead of turpentine in lacquers, shoe polishes, floor waxes, in motor fuel and lubricants, and patent fuel in stoves. TLV: N.A. Odour: Aromatic Odour Threshold: 99 ppm

• Cyclopentane, methyl- Sources: Methylcyclopentane is used in organic synthesis and as an extractive solvent, azeotropic distillation agent, component of mixed hydrocarbons solvent, and is a combustion product.

8

TLV: N.A. Odour: Sweet, gasoline Odour Threshold: N.A

Common Sources: Organic Acids

• Acetic acid

Sources: Acetic acid is used in the manufacturing of vinyl acetate monomer, which in turn is used to produce base resins for water-based paints, hot melt adhesives, paper coatings, and textile finishes. It is found in caulks and sealants, wood products, rubber, and food additives. Acetic acid has also been found in adhesives used in archival boxes. In consumer products, it is used in glass window cleaning preparations, household detergents and surface cleaners, laundry aids, disinfectants, polishes, and varnish removers. Ambient sources of acetic acid include burning heating and combustion processes. It is also found to be an oxidation product of coal. TLV: 10 ppm (24.5 mg/m3) STEL: 15 ppm (36.8 mg/m3) Odour: Sour, vinegar-like Odour Threshold: 1 ppm

Common Sources: Polycyclic Hydrocarbons

• Naphthalene

Sources: The uses of naphthalene include resins and dyes, herbicides and insecticides, surface active agents, and chemical production. Indoor sources include toilet deodorant blocks, paint-related products, moth repellents, nonstructural caulking compounds, sealants, automotive chemicals, synthetic resin and rubber adhesives, wall coverings, and wood office work surfaces. Naphthalene emission can also originate from coal tar materials, petrochemical products and combustion such as the burning of wood, tobacco smoking, vehicle exhaust, heating, curing, and other industrial emissions. TLV: (10 ppm) (52.4 mg/m3) STEL: (15 ppm) (78.6 mg/m3) Odour: Mothball, tar-like Odour Threshold: 0.038 ppm

Common Sources: Siloxanes/Silanes

• Cyclopentasiloxane, decamethyl-

Sources: Decamethylcyclopentasiloxane is used in personal care products such as lotion, cosmetics, and hair spray. It is also used in sealant materials, carpet, ceiling tiles, floor and furniture polish, lubricants, silicone adhesive, and elastomers in ceiling light gaskets and as a dry cleaning solvent replacing perchloroethylene. It is often found with ethanol when used in personal care products or with limonene if used with cleaning or polishing products. TLV: N.A. Odour: N.A. Odour Threshold: N.A.

Notes:

This report summarizes the results of the open characterization analysis completed through the semi-quantitative determination of the concentrations of the VOCs only. The VOCs categorized in this report are only based on the top major compounds. In general, up to 300 VOCs are usually detected in indoor samples. The interpretations of results presented in this report are based on the pattern of VOCs and the provided information and should be used with discretion. The sources of VOCs provided are not exhaustive or intended to be complete. Site inspection and investigation will provide more comprehensive information on the likely sources of VOCs. Please note that this report is strictly focused on VOCs or compounds that can be detected using this method (mass scanning range from 34 amu to 400 amu). Unstable/reactive compounds as well as those outside of this range would not be detected. Revision to test report 2504056 (revised to 2504056A) Summary of Results was applied as per the client’s request; concentrations reported in parts per billion (ppb).


APPENDIX D Laboratory Analytical Report: Mould Air

SPORE TRAP SAMPLE NO.:

a HCS-ST-206 HCS-ST-204 HCS-ST-201 HCS-ST-218 HCS-ST-147 HCS-ST-HC

Location: 2nd Floor,

Room 206

2nd Floor,

Room 204

2nd Floor,

Room 201

2nd Floor,

Room 218

1st Floor, Room

147

1st Floor,

Cafeteria

Hallway

Serial #: 940546 940557 940585 940574 940579 940580

Expiry date: 2012/03 2012/03 2012/03 2012/03 2012/03 2012/03

Volume (L): 75 75 75 75 75 75

Magnification (x): 600 600 600 600 600 600

Background (rating)

b

: 3+ 2+ 2+ 2+ 2+ 3+

No. of transects enumerated: 10 10 10 10 10 10

FUNGAL IDENTIFICATION

c

: COMPOSITION (raw count) approx. elements / m

3

Ê

d

ascospores NOS - (1) 53 - (1) 53 - -

basidiospores NOS (5) 270 (13) 690 (4) 210 (14) 740 (29) 1500 (6) 320

Cladosporium NOS (2) 110 (tr) tr - - (tr) tr -

Epicoccum NOS - - - - (tr) tr -

hyphal fragments, pigmented (1) 53 - - - - -

unknown amerospores, pigmented, globose - - - - (tr) tr -

SUMMARY DATA

e

:

TOTAL (raw count) 8 14 4 15 29 6

LOD (elements / m

3

) 53 53 53 53 53 53

TOTAL (elements / m³) 430 750 210 800 1,500 320

AIHA LAP, LLC LAB NO: 171117

Samples were received in satisfactory condition and tested in accordance with SOP 2.1.2.1. These results relate only to the samples tested.

a

Analysis compliant with ASTM D7391Ð09 Standard Test Method for Categorization and Quantification of Airborne Fungal Structures in an Inertial Impaction Sample by Optical Microscopy.

b

Rating (amount of trace occluded with particulate matter): 0+ = no particulate matter detected, 1+ = >0 to approx. 5%, 2+ = approx. 5% to 25%, 3+ = approx. 25% to 75%, 4+ = approx. 75% to 90%, 5+ =

>90%, Negative bias increases with increasing background rating.

c

Identification to genus level, taxonomic group or morphological category, where appropriate; NOS = Not otherwise specified.

d

Evaluated in Nomarski Differential Interference Contrast (DIC) microscopy; tr = observed outside of enumerated transects; - = not detected.

e

Total elements / m

3

expressed at two significant digits; LOD = Limit of detection; NFEO = No fungal elements observed.

Sporometrics Inc.

219 Dufferin Street, Suite 20C, Toronto, ON M6K 1Y9 - t.416-516-1660 - f.416-516-1670 - www.sporometrics.com

RESULTS OF LABORATORY ANALYSES: JOB NO. 19346.00

To: Pamela Sears Date of report: 2012/05/07

Company: Stantec Consulting Ltd. - Dartmouth, NS Date of sampling: 2012/04/26

Client Project: 121411939 Task 200.300 Analyst: Yaima Arocha-Rosete

Client Address: 40 Highfield Park Drive, Suite 102, Dartmouth, NS B3A 0A3 Date Received: 2012/04/30

SPOROMETRICS 19346.00 PAGE 1 OF 3

SPORE TRAP SAMPLE NO.:

a HCS-ST-HALL HCS-ST-OR - - - -

Location: 1st Floor,

Hallway outside

Room 113

Outdoor

Reference

Serial #: 940595 940594

Expiry date: 2012/03 2012/03

Volume (L): 75 75

Magnification (x): 600 1000

Background (rating)

b

: 2+ 2+

No. of transects enumerated: 10 8

FUNGAL IDENTIFICATION

c

: COMPOSITION (raw count) approx. elements / m

3

Ê

d

ascospores NOS (2) 110 (10) 1100

basidiospores NOS (53) 2800 (98) 11000

Cladosporium NOS - (tr) tr

Epicoccum NOS - -

hyphal fragments, pigmented (tr) tr -

unknown amerospores, pigmented, globose - -

SUMMARY DATA

e

:

TOTAL (raw count) 55 108

LOD (elements / m

3

) 53 110

TOTAL (elements / m³) 2,900 12,000

AIHA LAP, LLC LAB NO: 171117

Samples were received in satisfactory condition and tested in accordance with SOP 2.1.2.1. These results relate only to the samples tested.

a

Analysis compliant with ASTM D7391Ð09 Standard Test Method for Categorization and Quantification of Airborne Fungal Structures in an Inertial Impaction Sample by Optical Microscopy.

b

Rating (amount of trace occluded with particulate matter): 0+ = no particulate matter detected, 1+ = >0 to approx. 5%, 2+ = approx. 5% to 25%, 3+ = approx. 25% to 75%, 4+ = approx. 75% to 90%, 5+ =

>90%, Negative bias increases with increasing background rating.

c

Identification to genus level, taxonomic group or morphological category, where appropriate; NOS = Not otherwise specified.

d

Evaluated in Nomarski Differential Interference Contrast (DIC) microscopy; tr = observed outside of enumerated transects; - = not detected.

e

Total elements / m

3

expressed at two significant digits; LOD = Limit of detection; NFEO = No fungal elements observed.

Sporometrics Inc.








END OF REPORT

Examined By Released By

Yaima Arocha-Rosete, PhD Yordanka Gonzalez Guardiola, MSc

Analyst Analyst

Sporometrics Inc.









APPENDIX E Laboratory Analytical Report: Lead

Your P.O. #: 16300R-40 Your Project #: 121411939.200.300 Your C.O.C. #: ES530112

Attention: Don HarttStantec Consulting LtdDartmouth - Standing Offer40 Highfield Park DriveSuite 102Dartmouth, NSB3A 0A3

Report Date: 2012/05/07

CERTIFICATE OF ANALYSIS

MAXXAM JOB #: B261591Received: 2012/04/30, 16:12

Sample Matrix: Paint# Samples Received: 2

Date Date MethodAnalyses Quantity Extracted Analyzed Laboratory Method ReferenceLead Paint Avail. MS - N-per 2 2012/05/03 2012/05/03 ATL SOP 00024 Based on EPA6020A

Remarks:

Reporting results to two significant figures at the RDL is to permit statistical evaluation and is not intended to be anindication of analytical precision.

* RPDs calculated using raw data. The rounding of final results may result in the apparent difference.

Encryption Key

Please direct all questions regarding this Certificate of Analysis to your Project Manager.

LEONARD MUISE, Project ManagerEmail: [email protected]# (902) 420-0203

====================================================================Maxxam has procedures in place to guard against improper use of the electronic signature and have the required "signatories", as per section5.10.2 of ISO/IEC 17025:2005(E), signing the reports. For Service Group specific validation please refer to the Validation Signature Page.

Total cover pages: 1

Page 1 of 5

Stantec Consulting LtdMaxxam Job #: B261591 Client Project #: 121411939.200.300Report Date: 2012/05/07

Your P.O. #: 16300R-40Sampler Initials: DA

ELEMENTS BY ICP/MS (PAINT)

Maxxam ID N H 3 3 3 1 N H 3 3 3 1 N H 3 3 3 2Sampling Date 2012/04/26 2012/04/26 2012/04/26

U n i t s PS-R220 PS-R220 PS-R201 RDL QC BatchLab-Dup

Metals

Available Lead (Pb) mg/kg 890 900 850 50 2837662

RDL = Reportable Detection LimitQC Batch = Quality Control Batch

Page 2 of 5

Stantec Consulting LtdMaxxam Job #: B261591 Client Project #: 121411939.200.300Report Date: 2012/05/07

Your P.O. #: 16300R-40Sampler Initials: DA

Package 1 21.0°CEach temperature is the average of up to three cooler temperatures taken at receipt

GENERAL COMMENTS

Results relate only to the items tested.

Page 3 of 5

Stantec Consulting LtdAttention: Don Hartt Client Project #: 121411939.200.300P.O. #: 16300R-40Site Location:

Quality Assurance ReportMaxxam Job Number: DB261591

QA/QC DateBatch AnalyzedNum Init QC Type Parameter yyyy/mm/dd Value Recovery Units QC Limits

2837662 DLB Matrix Spike[NH3331-01] Available Lead (Pb) 2012/05/03 NC % 75 - 125Spiked Blank Available Lead (Pb) 2012/05/03 103 % 75 - 125Method Blank Available Lead (Pb) 2012/05/03 ND, RDL=50 mg/kgRPD [ N H 3 3 3 1 - 0 1 ] Available Lead (Pb) 2012/05/03 0.4 % 35

Duplicate: Paired analysis of a separate portion of the same sample. Used to evaluate the variance in the measurement.Matrix Spike: A sample to which a known amount of the analyte of interest has been added. Used to evaluate sample matrix interference.Spiked Blank: A blank matrix to which a known amount of the analyte has been added. Used to evaluate analyte recovery.Method Blank: A blank matrix containing all reagents used in the analytical procedure. Used to identify laboratory contamination.NC (Matrix Spike): The recovery in the matrix spike was not calculated. The relative difference between the concentration in the parent sample and thespiked amount was not sufficiently significant to permit a reliable recovery calculation.

Page 4 of 5

Validation Signature Page

Maxxam Job #: B261591

The analytical data and all QC contained in this report were reviewed and validated by the following individual(s).

MIKE MACGILLIVRAY, Scientific Specialist (Inorganics)

====================================================================Maxxam has procedures in place to guard against improper use of the electronic signature and have the required "signatories", as per section 5.10.2 ofISO/IEC 17025:2005(E), signing the reports. For Service Group specific validation please refer to the Validation Signature Page.

Page 5 of 5


APPENDIX F Laboratory Analytical Report: Mould Bulk & Tape Lift

MYCOTAXON CONSULTING LTD. 3 Rockwood Avenue Halifax, Nova Scotia Canada B3N 1X4 Phone: 902-475-1456 Fax: 902-475-1982 Mr. Don Hartt Stantec Consulting Ltd. Suite 102 40 Highfield Park Dr. Dartmouth, N.S. B3A 0A5

May 28, 2012 Dear Mr. Hartt: Herewith are the results of the microscopic examination of the bulk and tape samples from your project 121411939 Task 200.300, which were received by this laboratory on May 25, 2012. SAMPLE GENERA MBS 1 active growth Cladosporium sp. colonies MBS 2 active growth Cladosporium sp. colonies MBS 3 active growth Stachybotrys sp. colonies heavy Aspergillus/Penicillium-like spores TMS 1 active growth Cladosporium sp. colonies Note: 1. Aspergillus/Penicillium-like spores may include those of Acremonium, Paecilomyces, and Trichoderma I hope this is helpful. If you have any questions concerning this report, please do not hesitate to contact me. Sincerely yours, Mycotaxon Consulting Ltd. Per: Thomas G. Rand, Ph.D. Mycology


APPENDIX G Site Specific Photographs

Project No: 121411939

Photo 1: Showing building envelope at wall/roof deck joint in Room 220, which is a potential pathway for air/vapour and water intrusion. April 26, 2012.

Photo 2: Showing rusting around roof deck and parallel roof truss weld attachment resulting in holes in flutes exposing a potential pathway for air/vapout and water intrusion. April 26, 2012.


Photo 3: Building envelope deficiency showing exterior wall on east wing. Siding improperly installed. April 26, 2012.

Photo 4: Building envelope deficiency showing window flashing on north east corner of main school. Water intrusion inside building envelope cavity. April 26, 2012.


Photo 5: Showing exterior window caulking in poor condition. April 26, 2012.

Photo 6: Showing peeling paint in poor condition on roof deck in Room 201. The paint contains detectable concentrations of lead. April 26, 2012.


Photo 7: Showing suspected asbestos-containing pipe fittings in vulnerable position next to a basketball net in the gymnasium. April 26, 2012.

Photo 8: Showing suspected asbestos-containing pipe fittings in poor condition in gymnasium. April 26, 2012.


Photo 9: Room 201. Flute ending at exterior wall with foam stopper. Flashing covering I-beam. Not all flutes containing foam stopper. May 24, 2012.

Photo 10: Room 201. Flute ending at exterior wall with foam stopper. Flashing covering I-beam. Tar compound observed on back of foam stopper. May 24, 2012.


Photo 11: Room 201. Flute ending at exterior wall supported by I-beam. Tar compound observed on wood butted up against flute at parapet. May 24, 2012.

Photo 12: North stairwell plenum exterior wall. Water staining observed on wood at parapet. May 24, 2012.


Photo 13: Room 208. Showing end of parallel chord roof truss and metal roof deck at parapet. Water stained wood observed along with tar compound. May 24, 2012.

Photo 14: Room 208. Showing metal roof deck meeting parapet. Water staining on wood and steel I-beam observed. Above wood roof thermal membrane is visible. May 24, 2012.


Photo 15: North stairwell exterior wall. Large cracks observed in corners. Ceiling tiles with water stains observed. May 24, 2012.

Photo 16: Room 220. Exterior wall showing wall roof joint. Fiberglass insulation sealing cavity at parapet between roof deck and steel I-beam support. May 24, 2012.


Photo 17: Room 208. Tar compound dripping from holes in metal roof deck. May 24, 2012.

Photo 18: Room 218. Showing wood rot and apparent mould at window header and on exterior plywood wall. Also observed rusted I-beam. May 24, 2012.



Photo 20: Room 218. Showing apparent mould on exterior plywood wall at wall/floor joint. No pooling at base indicating moisture is seeping below floor. May 24, 2012.



Photo 22: Room 218. Showing apparent mould at window base and on exterior plywood wall. May 24, 2012.


Photo 23: Room 216. Showing apparent mould on window header and exterior plywood wall. May 24, 2012.

Photo 24: Room 216. Apparent mould on window header and exterior plywood wall. Strong draft coming from concrete block cavity at parapet. May 24, 2012.


Photo 25: Showing gap in envelope between concrete block/brick façade and sheet metal siding with wood frame. May 24, 2012.

Photo 26: Room 216. Showing building materials affected by water damage/intrusion around window base. May 24, 2012.


Photo 27: Room 216. Showing building materials affected by water damage/intrusion around window base. May 24, 2012.

Photo 28: Room 204. Showing apparent mould on exterior plywood wall. May 24, 2012.


Photo 29: Room 204. Showing apparent mould on exterior plywood wall. May 24, 2012.

Photo 30: Room 214. Showing window base that has been abated for mould and re-insulated by the CRSB. May 24, 2012.


Photo 31: Room 218. Water impacted drywall removed from exterior wall with apparent mould. Wrapped in light gauge plastic bag. May 24, 2012.

Photo 32: Photo taken from outside window in Room 218 showing detailing around roof curb flashing/parapet. May 24, 2012.


Photo 33: Exterior cladding removal outside room 218 and 120. Water damage and black staining observed on exterior surface of sheathing. July 17, 2012.

Photo 34: Exterior cladding removal. Photo of instrument detecting moisture along base of sheathing. Black staining also observed. July 17, 2012.


Photo 35: Exterior cladding removal outside room 218 and 120. Water damage and black staining observed on exterior surface of sheathing above window header of room 218. July 17, 2012.

Photo 36: Exterior cladding removal. Photo of instrument detecting moisture above window header of room 218. Black staining also observed. July 17, 2012.


Photo 37: Exterior cladding removal. Water damage and black staining observed on exterior surface of sheathing around window corner of room 218. July 17, 2012.

Photo 38: Exterior cladding removal. Photo showing black staining and water damage cause by moisture leaking in through brick façade mortar adjacent to exterior sheathing. July 17, 2012.


Photo 39: Exterior cladding removal outside of rooms 215 and 119. Building construction different than on the front of HCMS. Nothing noted. July 17, 2012.

Photo 40: Exterior cladding removal outside of rooms 101. Building construction different than on the front of HCMS. Nothing noted. July 17, 2012.

Date post:	22-Jul-2020
Category:	Documents
Upload:	others
View:	4 times
Download:	0 times

FINAL REPORT 2: Building Investigation – Highland ... · 11/2/2012 · FINAL REPORT 2 –...

Documents