ontario ministry of the environment and climate change ... 218567.pdf · assessment roll number(s)...

Ontario Ministry of the Environment and Climate Change - Record of Site Condition # 218567

Record of Site Condition

Under Part XV.1 of the Environment Protection Act

Summary

Notice to Readers Concerning Due Diligence

This record of site condition has been filed in the Environmental Site Registry to which the public has

access and which contains a notice advising users of the Environmental Site Registry who have dealings

with any property to consider conducting their own due diligence with respect to the environmental

condition of the property, in addition to reviewing information in the Environmental Site Registry.

Contents of this Record of Site Condition

This record of site condition consists (RSC) of this document which is available to be printed directly from

the Environmental Site Registry as well as all supporting documentation indicated in this RSC to have been

submitted in electronic format to the Ministry of the Environment and Climate Change.

Record of Site Condition Number 218567Date Filed to Environmental Site Registry 2015/07/07Certification Date 2015/02/03Current Property Use Agricultural/OtherIntended Property Use ResidentialCertificate of Property Use Number No CPUApplicable Site Condition Standards** Full Depth Generic Site Conditions Standard,

with Potable Ground Water, for Residentialproperty use

Property Municipal Address 6330 16TH AVENUE, MARKHAM, ON, L3P 5Y7

1 of 20Filed Record of Site Condition # 218567 on 2015/07/07

PART 1: PROPERTY OWNERSHIP, PROPERTY INFORMATION AND OWNER'S CERTIFICATIONS

Information about the owner who is submitting or authorizing the submission of the RSC

Owner Name STARGRANDE CUSTOM HOMES CORP

Authorized Person ARMANDO BALDASSARRA

Mailing Address 8700 DUFFERIN, CONCORDONTARIO, CANADA

Postal Code L4K 4S5

Phone (416) 661-5989

Fax (905) 738-0342

Email Address


RSC Property Location Information

Municipal Address(es) 6330 16TH AVENUE, MARKHAM, ON L3P 5Y7

Municipality Markham

Legal Description See Attached Lawyer’s Letter

Assessment Roll Number(s)

36030231608000000000

Property Identifier Number(s)

03061-4280 (LT)

RSC Property Geographical References

Coordinate System UTM

Datum NAD 83

Zone 17

Easting 640,192.00

Northing 4,861,722.00

RSC Property Use Information

The following types of property uses are defined by the Regulation: Agricultural or other use, Commercial use, Community use, Industrial use, Institutional use, Parkland use, and Residential use.

Current Property Use Agricultural/Other

Intended Property Use Residential

Certificate of Property Use has been issued under section 168.6 of the EPA

No


Please See the Signed Statements of Property Owner, or Agent, or Receiver at the End of this RSC

The rest of this page has been left intentionally blank


PART 2: LIST OF REPORTS, SUMMARY OF SITE CONDITIONS AND QUALIFIED PERSON’S STATEMENTS AND CERTIFICATIONSQualified Person's Information

Name BRUCE MATTHEW HARPER

Type of Licence Under Professional Engineers Act

Licence

Licence Number 90465196

QP Employer Name EXP SERVICES INC

Mailing Address 405 MAPLE GROVE ROAD UNIT 6, CAMBRIDGEONTARIO, N3E 1B6 CANADA

Phone (519) 650-4918

Fax (519) 650-4603

Email Address [email protected]

Municipal Information

Local or Single-Tier Municipality

Markham

Upper-Tier Municipality York

Ministry of the Environment and Climate Change District Office

District Office York-Durham District Office

District Office Address 230 Westney Rd. S., 5th floor, Ajax ON L1S 7J5


Phase One Environmental Site Assessment ReportDocument used as the phase one environmental site assessment report and updates in submitting the RSC for filing

The date the last work on all of the records review, interviews and site reconnaissance components of the phase one environmental site assessment was done (refer to clause 28(1)(a) of O. Reg. 153/04)

(YYYY/MM/DD)

2015-02-03

Type of Report

Report Title Date of Report (YYYY/MM/DD)

Author of Report

Name of ConsultingCompany

P1 ESA Revised Phase One Environmental Site Assessment, 6330 16th Avenue, Markham, Ontario

2015-05-05 Bruce Harper EXP SERVICES INC

Reports and Other Documents Related to the Phase One Environmental Site AssessmentReports and other documents relied upon in certifying the information set out in section 10 of Schedule A or otherwise used in conducting the phase one environmental site assessment


Author of Report


Phases 1 and II Environmental Site Assessment, Proposed Residential Site Development, 6330 16th Avenue, Town of Markham, Ontario

2008-03-18 I Chiu Soil Engineers Ltd.

Phase One Environmental Site Assessment, Proposed Residential Development, 6330 16th Avenue, City of Markham

2013-01-24 V. Kopetskyy I.Chiu

Soil Engineers Ltd.


Phase Two Environmental Site Assessment ReportDocument used as the phase two environmental site assessment report and updates in submitting the RSC for filing

The date the last work on all of the planning of the site investigation and conducting the site investigation components of the phase two environmental site assessment was done (refer to clause 33.5(1)(a) of O. Reg. 153/04)

(YYYY/MM/DD)

2015-02-03

Type of Report


Author of Report


P2 ESA Revised Phase Two Environmental Assessment, 6330 16th Avenue, Markham, Ontario

2015-05-05 Bruce Harper EXP SERVICES INC

Reports and Other Documents Related to the Phase Two Environmental Site AssessmentReports and other documents relied upon in making any certifications in the RSC for the purposes of Part IV of Schedule A or otherwise used in conducting the phase two environmental site assessment

Report Title Date of Report (YYYY/MM/DD).

Author of Report


Results of Soil Delineation Program, Proposed Residential Development, 6330 16th Avenue, Markham, Ontario

2013-11-01 A. Upper I.Chiu Soil Engineers Ltd.

Soil Sampling and Chemical Analysis, Proposed Residential Development, 6330 16th Avenue, Markham, Ontario

2013-09-25 I. Chiu Soil Engineers Ltd.

Results of Chemical Analysis of Soil and Groundwater Samples, 6330 16th Avenue, Markham

2013-07-04 V. Kopetskyy Soil Engineers Ltd.

Phase Two Environmental Site Assessment, Proposed Residential Development 6330 16th Avenue, City of Markham

2013-01-09 V. Kopetskyy, I.Chiu

Soil Engineers Ltd.

Phases 1 and II Environmental Site Assessment, Proposed Residential Develoment, Town of Markham

2008-03-08 I. Vhiu Soil Engineets Ltd.


Environmental ConditionSection 41 applies? No

Section 43.1 applies? Yes

Site Condition InformationCertification date (YYYY/MM/DD) 2015/02/03

Total area of RSC property (in hectares) 3.90000

Number of any previously filed RSC that applies to any part of the RSC property 218306

Number of any previously filed Transition Notice that applies to any part of the RSC property

Soil Texture

Assessment/Restoration Approach Full Depth Generic

Site investigation includes the investigation, sampling and analysis of ground water? Yes

Is there soil present that is sufficient to investigate, sample and analyze soil on, in or under the property in accordance with s. 6, Schedule E of O.Reg. 153/04?

Yes

Site investigation includes the investigation, sampling and analysis of soil on, in or under the property which is used in the RSC?

Yes

Name of the laboratory used to analyze any samples collected of soil, ground water or sediment

MAXXAM ANALYTICS INTERNATIONAL INC, ALS INTERNATIONAL, AGAT LABORATORIES

Ground water condition (potable, non-potable) Potable

Applicable Site Condition Standard TABLE 8


Table 1 – Maximum Contaminant Concentrations Compared to Applicable Site Condition Standards

Measured Concentration for Contaminants in Soil

ContaminantName

Maximum Concentration

Applicable Site Condition Standard

Unit of Measure

1 Bromodichloromethane < 0.05 0.05 µg/g

2 Bromoform < 0.05 0.05 µg/g

3 Dibromochloromethane < 0.05 0.05 µg/g

4 Antimony < 1 1.3 µg/g

5 Arsenic 2.2 18 µg/g

6 Selenium < 1 1.5 µg/g

7 Polychlorinated Biphenyls < 0.015 0.3 µg/g

8 Boron (Hot Water Soluble)* 0.33 1.5 µg/g

9 Chromium VI < 0.4 0.66 µg/g

10 Cyanide (CN-) < 0.04 0.051 µg/g

11 Electrical Conductivity 0.194 0.7 mS/cm

12 Mercury 0.039 0.27 µg/g

13 Sodium Adsorption Ratio 0.776 5

14 Acetone < 0.5 0.5 µg/g

15 Bromomethane < 0.05 0.05 µg/g

16 Carbon Tetrachloride < 0.05 0.05 µg/g

17 Chlorobenzene < 0.05 0.05 µg/g

18 Chloroform < 0.05 0.05 µg/g

19 Dichlorobenzene, 1,2- < 0.05 0.05 µg/g



22 Dichlorodifluoromethane < 0.05 0.05 µg/g

23 Dichloroethane, 1,1- < 0.05 0.05 µg/g

24 Dichloroethane, 1,2- < 0.05 0.05 µg/g

25 Dichloroethylene, 1,1- < 0.05 0.05 µg/g

26 Dichloroethylene, 1,2-cis- < 0.05 0.05 µg/g

27 Dichloroethylene, 1,2-trans- < 0.05 0.05 µg/g

28 Dichloropropane, 1,2- < 0.05 0.05 µg/g

29 Dichloropropene,1,3- < 0.03 0.05 µg/g

30 Ethylene dibromide < 0.05 0.05 µg/g

31 Hexane (n) < 0.05 0.05 µg/g

32 Methyl Ethyl Ketone < 0.5 0.5 µg/g

33 Methyl Isobutyl Ketone < 0.5 0.5 µg/g

34 Methyl tert-Butyl Ether (MTBE) < 0.05 0.05 µg/g

35 Methylene Chloride < 0.05 0.05 µg/g

...Continued on next page




Continued from previous page....

ContaminantName



Unit of Measure

36 Styrene < 0.05 0.05 µg/g

37 Tetrachloroethane, 1,1,1,2- < 0.05 0.05 µg/g

38 Tetrachloroethane, 1,1,2,2- < 0.05 0.05 µg/g

39 Tetrachloroethylene < 0.05 0.05 µg/g

40 Trichloroethane, 1,1,1- < 0.05 0.05 µg/g

41 Trichloroethane, 1,1,2- < 0.05 0.05 µg/g

42 Trichloroethylene < 0.05 0.05 µg/g

43 Trichlorofluoromethane < 0.05 0.25 µg/g

44 Vinyl Chloride < 0.02 0.02 µg/g

45 Petroleum Hydrocarbons F1**** < 10 25 µg/g

46 Petroleum Hydrocarbons F2 < 10 10 µg/g



49 Acenaphthene < 0.05 0.072 µg/g

50 Acenaphthylene 0.0082 0.093 µg/g

51 Anthracene 0.016 0.22 µg/g

52 Benz[a]anthracene 0.12 0.36 µg/g

53 Benzo[a]pyrene 0.15 0.3 µg/g

54 Benzo[b]fluoranthene 0.24 0.47 µg/g

55 Benzo[ghi]perylene 0.13 0.68 µg/g

56 Benzo[k]fluoranthene 0.084 0.48 µg/g

57 Chrysene 0.15 2.8 µg/g

58 Dibenz[a h]anthracene 0.021 0.1 µg/g

59 Fluoranthene 0.32 0.69 µg/g

60 Fluorene 0.0051 0.19 µg/g

61 Indeno[1 2 3-cd]pyrene 0.12 0.23 µg/g

62 Methlynaphthalene, 2-(1-) *** < 0.042 0.59 µg/g

63 Naphthalene < 0.05 0.09 µg/g

64 Phenanthrene 0.1 0.69 µg/g

65 Pyrene 0.25 1 µg/g

66 Aldrin < 0.002 0.05 µg/g

67 Chlordane < 0.002 0.05 µg/g

68 DDD < 0.002 0.05 µg/g

69 DDE < 0.002 0.05 µg/g

70 DDT < 0.002 1.4 µg/g






ContaminantName



Unit of Measure

71 Dieldrin < 0.002 0.05 µg/g

72 Endosulfan < 0.002 0.04 µg/g

73 Endrin < 0.002 0.04 µg/g

74 Heptachlor < 0.002 0.05 µg/g

75 Heptachlor Epoxide < 0.002 0.05 µg/g

76 Hexachlorobenzene < 0.002 0.02 µg/g

77 Hexachlorobutadiene < 0.002 0.01 µg/g

78 Hexachlorocyclohexane Gamma- < 0.002 0.01 µg/g

79 Hexachloroethane < 0.002 0.01 µg/g

80 Methoxychlor < 0.005 0.05 µg/g

81 Barium 105 220 µg/g

82 Beryllium 0.6 2.5 µg/g

83 Boron (total) 8.2 36 µg/g

84 Cadmium 0.12 1.2 µg/g

85 Chromium Total 23 70 µg/g

86 Cobalt 5.9 22 µg/g

87 Copper 13 92 µg/g

88 Lead 20.5 120 µg/g

89 Molybdenum < 1 2 µg/g

90 Nickel 29 82 µg/g

91 Silver < 0.2 0.5 µg/g

92 Thallium < 1 1 µg/g

93 Uranium 0.35 2.5 µg/g

94 Vanadium 29 86 µg/g

95 Zinc 51.1 290 µg/g

96 Benzene < 0.02 0.02 µg/g

97 Ethylbenzene < 0.05 0.05 µg/g

98 Toluene < 0.2 0.2 µg/g

99 Xylene Mixture < 0.05 0.05 µg/g


Table 1 – Maximum Contaminant Concentrations Compared to Applicable Site Condition Standards (Continued)

Ground Water

ContaminantName



Unit of Measure

1 Bromodichloromethane < 0.5 16 µg/L

2 Bromoform < 1 25 µg/L

3 Dibromochloromethane < 0.5 25 µg/L

4 Petroleum Hydrocarbons F1**** < 25 420 µg/L

5 Petroleum Hydrocarbons F2 < 100 150 µg/L



8 Chloride 250,000 790000 µg/L

9 Chromium VI < 0.2 25 µg/L

10 Cyanide (CN-) < 2 52 µg/L

11 Mercury < 0.1 0.29 µg/L

12 Antimony < 1 6 µg/L

13 Arsenic 3.1 25 µg/L

14 Selenium 0.98 10 µg/L

15 Acetone < 10 2700 µg/L

16 Bromomethane < 0.5 0.89 µg/L

17 Carbon Tetrachloride < 0.2 0.79 µg/L

18 Chlorobenzene < 0.05 30 µg/L

19 Chloroform < 0.2 2.4 µg/L

20 Dichlorobenzene, 1,2- < 0.5 3 µg/L



23 Dichlorodifluoromethane < 1 590 µg/L

24 Dichloroethane, 1,1- < 0.2 5 µg/L

25 Dichloroethane, 1,2- < 0.5 1.6 µg/L

26 Dichloroethylene, 1,1- < 0.2 1.6 µg/L

27 Dichloroethylene, 1,2-cis- < 0.5 1.6 µg/L

28 Dichloroethylene, 1,2-trans- < 0.5 1.6 µg/L

29 Dichloropropane, 1,2- < 0.2 5 µg/L

30 Dichloropropene,1,3- < 0.3 0.5 µg/L

31 Ethylene dibromide < 0.2 0.2 µg/L

32 Hexane (n) < 1 51 µg/L

33 Methyl Ethyl Ketone < 10 1800 µg/L

34 Methyl Isobutyl Ketone < 5 640 µg/L

35 Methyl tert-Butyl Ether (MTBE) < 0.5 15 µg/L




Ground Water


ContaminantName



Unit of Measure

36 Methylene Chloride < 2 50 µg/L

37 Styrene < 0.5 5.4 µg/L

38 Tetrachloroethane, 1,1,1,2- < 0.5 1.1 µg/L

39 Tetrachloroethane, 1,1,2,2- < 0.5 1 µg/L

40 Tetrachloroethylene < 0.2 1.6 µg/L

41 Trichloroethane, 1,1,1- < 0.2 200 µg/L

42 Trichloroethane, 1,1,2- < 0.5 4.7 µg/L

43 Trichloroethylene < 0.2 1.6 µg/L

44 Trichlorofluoromethane < 0.5 150 µg/L

45 Vinyl Chloride < 0.2 0.5 µg/L

46 Acenaphthene < 0.1 4.1 µg/L

47 Acenaphthylene < 0.11 1 µg/L

48 Anthracene < 0.05 1 µg/L

49 Benz[a]anthracene < 0.08 1 µg/L

50 Benzo[a]pyrene < 0.01 0.01 µg/L

51 Benzo[b]fluoranthene < 0.03 0.1 µg/L

52 Benzo[ghi]perylene < 0.06 0.2 µg/L

53 Benzo[k]fluoranthene < 0.05 0.1 µg/L

54 Chrysene < 0.05 0.1 µg/L

55 Dibenz[a h]anthracene < 0.09 0.2 µg/L

56 Fluoranthene < 0.12 0.41 µg/L

57 Fluorene < 0.09 120 µg/L

58 Indeno[1 2 3-cd]pyrene < 0.03 0.2 µg/L

59 Methlynaphthalene, 2-(1-) *** < 0.028 3.2 µg/L

60 Naphthalene 0.14 11 µg/L

61 Phenanthrene < 0.11 1 µg/L

62 Pyrene < 0.05 4.1 µg/L

63 Sodium 163,000 490000 µg/L

64 Barium 174 1000 µg/L

65 Beryllium < 1 4 µg/L

66 Boron (total) 193 5000 µg/L

67 Cadmium 0.4 2.1 µg/L

68 Chromium Total 1.38 50 µg/L

69 Cobalt 1.55 3.8 µg/L

70 Copper 0.88 69 µg/L




Ground Water


ContaminantName



Unit of Measure

71 Lead < 1 10 µg/L

72 Molybdenum 16.9 70 µg/L

73 Nickel 4.5 100 µg/L

74 Silver < 0.2 1.2 µg/L

75 Thallium < 0.3 2 µg/L

76 Uranium < 2 20 µg/L

77 Vanadium 1.1 6.2 µg/L

78 Zinc 51.8 890 µg/L

79 Benzene < 0.2 5 µg/L

80 Ethylbenzene < 0.2 2.4 µg/L

81 Toluene < 0.2 22 µg/L

82 Xylene Mixture < 0.2 300 µg/L


Remedial Action and Mitigation

Remediated Soils

Estimated quantities of the soil, if any, originating at and remaining on the RSC property that have been remediated, at a location either on or off the property, to reduce the concentration of contaminants in the soil. Indicate the remediation process or processes used and the estimated amount of soil remediated by each identified process.

Soil Remediation Process Estimated Quantity of Soil (in-ground volume in m³)

Description of Remediation

Description of any action taken to reduce the concentration of contaminants (including soil removals) on, in or under the RSC property.

Four shallow excavations extending to approximate depths of from 1.7 to 3.8 metres below grade and ranging in surface area from 10 to 15 square metres were completed in the northeast and southeast quadrants of the RSC property to remove soil material, where one or more of barium, chromium VI, methylene chloride and polycyclic aromatic hydrocarbons (7 parameters) were detected at concentrations in excess of the MOECC Table 8 SCS. Approximately 120 tonnes of soil material were excavated and disposed off-Site. Laboratory chemical analysis of confirmatory soil samples collected from the floors and side walls of the excavations indicated that all assessed parameters were not detected at concentrations in excess of the MOECC Table 8 SCS or had reporting detection limits that were less than the MOECC Table 8 SCS.

Soil or Sediment Removed and Not Returned

Estimated quantities of soil or sediment, if any, removed from and not returned to the RSC property.

Estimated Quantity of Soil (in-ground volume in m³) 60.0

Estimated Quantity of Sediment (in-ground volume in m³)

Soil Brought to the Property

Estimated quantity of the soil, if any, being brought from another property to and deposited at the RSC property, not including any soil that may have originated at but been remediated off the RSC property and that is identified in section 28 of Schedule A.

Estimated Quantity of Soil Brought to the Property(in-ground volume in m³)


Ground Water Control or Treatment Measures

Ground water control or treatment measures that were required for the RSC property prior to the certification date for the purpose of submitting the RSC for filing.

Ground water control or treatment measures that are required for the RSC property after the certification date.

Estimated volume of ground water, if any, removed from and not returned to the RSC property.

Estimated Volume of Ground Water (in litres)


Other Activities Including Risk Management Measures

Constructed works that prior to the certification date for the purpose of submitting the RSC for filing, were required to control or otherwise mitigate the release or movement of known existing contaminants at the RSC property.

Constructed works that after the certification date, are required to control or otherwise mitigate the release or movement of known existing contaminants at the RSC property.

Monitoring or Maintenance

Soil Management Measures

Soil monitoring requirements or any requirements for care, maintenance or replacement or any monitoring or control works for known existing contaminants, if any, on the RSC property, after the certification date.

Ground Water Management Measures

Ground water monitoring requirements or requirements for care, maintenance or replacement of any monitoring or control works or known existing contaminants, if any, on the RSC property, after the certification date.

Remediated or Removed Soil, Sediment or Ground Water From Near Property Boundary

Has any soil, sediment or ground water at the RSC property that is or was located within 3 metres of the RSC property boundary been remediated or removed for the purpose of remediation?

No


Qualified Person’s Statements and CertificationsAs the qualified person, I certify that:

A phase one environmental site assessment of the RSC property, which includes the evaluation of the information gathered from a records review, site reconnaissance, interviews, a report and any updates required, has been conducted in accordance with the regulation by or under the supervision of a qualified person as required by the regulation.

A phase two environmental site assessment of the RSC property, which includes the evaluation of the information gathered from planning and conducting a site investigation, a report, and any updates required, has been conducted in accordance with the regulation by or under the supervision of a qualified person as required by the regulation.

The information represents the site conditions at the sampling points at the time of sampling only and the conditions between and beyond the sampling points may vary.

As of 2015/02/03, in my opinion, based on the phase one environmental site assessment and the phase two environmental site assessment, and any confirmatory sampling, there is no evidence of any contaminants in the soil, ground water or sediment on, in or under the RSC property that would interfere with the type of property use to which the RSC property will be put, as specified in the RSC.

Ground water sampling has been conducted in accordance with the regulation by or under the supervision of a qualified person as required by the regulation.

As of 2015/02/03, in my opinion, based on the phase one and phase two environmental site assessments and any confirmatory sampling, the RSC property meets the applicable full depth generic site condition standards prescribed by section 36 of the regulation for all contaminants prescribed by the regulation in relation to the type of property use for which this RSC is filed, except for those contaminants (if any) specified in this RSC at Table 2, Maximum Contaminant Concentrations Compared to Standards Specified in a Risk Assessment.

As of 2015/02/03, the maximum known concentration of each contaminant in soil, sediment and ground water at the RSC property for which sampling and analysis has been performed is specified in this RSC at Table 1, Maximum Contaminant Concentrations Compared to Applicable Site Condition Standards.

I am a qualified person and have the qualifications required by section 5 of the regulation.

I have in place an insurance policy that satisfies the requirements of section 7 of the regulation.

I acknowledge that the RSC will be submitted for filing in the Environmental Site Registry, that records of site condition that are filed in the Registry are available for examination by the public and that the Registry contains a notice advising users of the Registry who have dealings with any property to consider conducting their own due diligence with respect to the environmental condition of the property, in addition to reviewing information in the Registry.

The opinions expressed in this RSC are engineering or scientific opinions made in accordance with generally accepted principles and practices as recognized by members of the environmental engineering or science profession or discipline practising at the same time and in the same or similar location.

I do not hold and have not held and my employer EXP SERVICES INCdoes not hold and has not held a direct or indirect interest in the RSC property or any property which includes the RSC property and was the subject of a phase one or two environmental site assessmentor risk assessment upon which this record of site condition is based

To the best of my knowledge, the certifications and statements in this part of the RSC are true as of 2015/02/03.

By signing this RSC, I make no express or implied warranties or guarantees.

By checking the boxes above, and entering my membership/licence number in this submission, I, BRUCE MATTHEW HARPER, a qualified person as defined in section 5 of O. Reg. 153/04 am, on 2015/07/02:

a) signing this record of site condition submission as a qualified person; and b) making all certifications required as a qualified person for this record of site condition.

I Agree


Additional Documentation Provided by Property Owner or AgentThe following documents have been submitted to the Ministry of the Environment and Climate Changeas part of the record of site condition

Certificate of Status or equivalent for the owner

Lawyer’s letter consisting of a legal description of the property

Copy of any deed(s), transfer(s) or other document(s) by which the RSC property was acquired

A Current plan of Survey

Area(s) of Potential Environmental Concern

Table of Current and Past Uses of the Phase One Property

Phase 2 Conceptual Site Model

Owner or agent certification statements

6.1.2


20 of 20 Filed Record of Site Condition # 218567 on 2015/07/07

1

“TABLE OF AREAS OF POTENTIAL ENVIRONMENTAL CONCERN “ (Refer to clause 16(2)(a), ScheduleD, O.Reg. 153/04)

Area of Potential Environmental Concern1

Location of Area of Potential

Environmental Concern on Phase

One Property

Potentially Contaminating

Activity2

Location of PCA (on-site or off-

Site)

Contaminants of

Potential Concern3

Media Potentially Impacted (Ground water, soil and/or

sediment)

Historic Site Residence East Central Portion – vicinity of historic farm house

(28) Gasoline & Associated

Products in Fixed Tanks

On-Site PHCs/BTEX,

VOCs Soil and Groundwater

Northern Portion of Site Northern Portion of Site

(30) Importation of

Fill of Unknown

Quality

On-Site

PHCs/BTEX, Metals, PAHs

and VOCs Soil and Groundwater

Northern Portion of Site (Former MSW landfill approximately 150 to

200 m north of Site) Northern Portion of Site

58) Waste Disposal

and Waste

Management,

including thermal

treatment,

landfilling and

transfer of waste,

other than use of

biosoils as soil

conditioners.

Off-Site



2

Area of Potential Environmental Concern1

Location of Area of Potential

Environmental Concern on Phase

One Property

Potentially Contaminating

Activity2

Location of PCA (on-site or off-

Site)

Contaminants of

Potential Concern3

Media Potentially Impacted (Ground water, soil and/or

sediment)

Northern Portion of Site (fill material immediately of Site Northern Portion of Site

30) Importation of

Fill of Unknown

Quality

Off-Site



Notes:

1- Area of Potential Environmental Concern means the area on, in or under a phase one property where one or more contaminants are potentially present, as

determined through the phase one environmental site assessment, including through

(a) identification of past or present uses on, in or under the phase one property, and

(b) identification of potentially contaminating activity.

2- Potentially Contaminating Activity means a use or activity set out in Column A of Table 2 of Schedule D that is occurring or has occurred in a Phase One Study Area

3 – when completing this column, identify al contaminants of potential concern using the Method Groups as identified in the

“Protocol for use in the Assessment of Properties under Part XV.1 of the Environmental Protection Act. March 9, 2004, amended as of July 1, 2011as specified below:

ABNS PCBs Metals Electrical Conductivity SAR

CPs PAHs As, Sb,Se Cr(VI)

1.4-Dioxane THMs Na Hg

Dioxins/Furans, PCDDs/PCDFS VOCs B-HWS Methyl Mercury

OCs BTEX Cl- high pH

PHCs Ca. Mg, CN- low Ph

4 – When submitting a record of site of condition, a copy of this table must be attached.

“TABLE OF CURRENT AND PAST USES OF THE PHASE ONE PROPERTY (refer to clause 16(2)(b),Schedule D, O.Reg. 153/04)

6330 16th Avenue, Markham, Ontario

Approximate

Year Name of Owner

Description of Property

Use Property Use1

Other Observations

from Aerial

Photographs, Fire

Insurance Plans, Etc.

Prior 1857 Crown Land Vacant & Undeveloped Agricultural or

other None

1857 to 1868 Luton Miller Developed and Occupied Agricultural or

other None

1868 to 1881 John Reesor Developed and Occupied Agricultural or

other None

1881 to 2007 Grove Family Developed and Occupied Agricultural or

other

As evidenced from

aerial photographs,

gravel taking

operations and

creation of Swan Lake

to the northeast –

approximate 1960s

onwards

2008 to Present

Stargrande Custom

Homes Corp

Vacant and undeveloped

Agricultural or

other None

Notes:

1- For each owner, specify one of the following types of property use (as defined in O.Reg. 153/04) that applies:

Agricultural or other

Commercial use

Community use

Industrial use

Institutional use

Parkland use

Residential Use

2- When submitting record of site condition for filing, a copy of this table must be attached

Phase Two Conceptual Site Model 6330 16th Avenue, Markham, Ontario

Project Name 6330 16th Avenue, Markham, Ontario

Project Number

KCH-00216597-C0

Prepared By: exp Services Inc. 405 Maple Grove Road, Unit 6, Cambridge, Ontario N3E 1B6 Canada T: 519 650-4918 F: 519 650-4603 www.exp.com

http://www.exp.com/

Phase Two Conceptual Site Model

6330 16th Avenue, Markham, Ontario Project Number: KCH-00216597-C0

Date: June 30, 2015

2

Table of Contents

Table of Contents .......................................................................................................................................... 2

List of Figures ................................................................................................................................................ 4

List of Tables within the Text......................................................................................................................... 4

List of Tables outside of Text ........................................................................................................................ 4

1 Introduction ............................................................................................................................................ 6

1.1 Environmental Reports .................................................................................................................. 7

2 Potential Contaminating Activities and Areas of Potential Environmental Concern .............................. 7

2.1 Potential Contaminating Activities ................................................................................................. 7

2.2 Areas of Potential Environmental Concern ................................................................................... 8

2.3 Subsurface Structures and Utilities, and, Contaminant Transport ................................................ 8

3 Physical Setting of Phase Two/RSC Property ....................................................................................... 9

3.1 Site Description ............................................................................................................................. 9

3.2 Current and Proposed Future Uses ............................................................................................ 10

3.3 Surface Features ......................................................................................................................... 10

3.4 Site Stratigraphy/Geology ........................................................................................................... 10

3.5 Site Hydrogeology ....................................................................................................................... 11

3.6 Approximate Depth to Bedrock ................................................................................................... 12

3.7 Approximate Depth to Water Table ............................................................................................. 12

3.8 Site Condition Standards and Proximity to (i.e. 30 metres within) a Water Body ....................... 12

4 Summary of Subsurface Investigations and Remedial Works ............................................................ 14

5 Assessment of Areas of Potential Environmental Concern ................................................................. 18

5.1 Assessment of Soil COCs ........................................................................................................... 18

5.2 Groundwater COCs ..................................................................................................................... 20

6 Former Contaminants of Concern/Pre-Remediation Site Conditions .................................................. 22

6.1 Sampling Locations Where COCs were Found .......................................................................... 22

6.2 COCs Found at Specific Locations ............................................................................................. 23

6.3 Media Where COCs Were Found .............................................................................................. 24

6.4 Description of Locations Where COCs were found .................................................................... 24

6.5 Distribution of Former Soil COCs ................................................................................................ 25

6.6 Source of Former COCs ............................................................................................................. 26

6.7 Potential for Contaminant Migration ............................................................................................ 26

6.8 Climatic and Meteorological Influences ...................................................................................... 26

6.9 Potential For Vapour Intrusion .................................................................................................... 27

7 Post-Remediation Site Conditions ....................................................................................................... 27

8 Underground Utility Services ............................................................................................................... 28

9 Receptors and Exposure Pathways ..................................................................................................... 28



Date: June 30, 2015

3

9.1 Contaminants of Concern ........................................................................................................... 29

9.2 Human Receptors and Potential Exposure Pathways ................................................................ 29

9.3 Pre-remediation HHCSM and ECSM .......................................................................................... 32

9.4 Post Remediation HHCSM and ECSM ....................................................................................... 32

10 Signatures ....................................................................................................................................... 33



Date: June 30, 2015

4

List of Figures

Figure 1: Site Location Plan

Figure 2: Site Investigative Location Plan

Figure 3: Site Survey and Boundaries

Figure 4a: Potential Contaminating Activities

Figure 4b: Areas of Potential Environmental Concern

Figure 5a: Previous Metals Soil Results Exceeding the MOECC Table 8 SCS

Figure 5b: Previous VOC Soil Results Exceeding the MOECC Table 8 SCS

Figure 5c: Previous PAH Soil Results Exceeding the MOECC Table 8 SCS

Figure 6: Cross Section Location Plan

Figure 7a: Cross Section AA’

Figure 7b: Cross Section BB’

Figure 7c: Cross Section CC’

Figure 7d: Cross Sections DD’, EE’, FF and GG’

Figure 8a: Groundwater Elevation Plan – March 25, 2014

Figure 8b Groundwater Elevation Plan – June 4, 2014

Figure 8c: Groundwater Elevation Plan – October 6, 2014

Figure 9: Remedial Excavation Location Plan

Figure 10: Remedial Excavation Confirmatory Sample Location Plan

Figure 11a Pre Remediation Human Health Conceptual Site Model

Figure 11b: Post Remediation Human Health Conceptual Site Model

Figure 12a: Pre Remediation Ecological Conceptual Site Model

Figure 12b: Pre Remediation Ecological Conceptual Site Model

Figure 13: Water Well Location Plan

List of Tables within the Text

Table 7.1: Pre-Remediation Soil Sampling Locations With Parameters Detected at Concentrations in Excess of the MOECC Table 8 SCS.

Table 8.1: Remedial Excavation Locations

List of Tables outside of Text

Table 1: Site Environmental Setting Data

Table 2: Summary of Overburden Stratigraphy

Table 3: Monitoring Well Completion Details

Table 4: Soil Sampling Summary

Table 5: Groundwater Sampling Summary



Date: June 30, 2015

5

Table 6: Maximum Soil Concentration Data – Metals and Inorganics

Table 7: Maximum Soil Concentration Data – Polycyclic Aromatic Hydrocarbons

Table 8: Maximum Soil Concentration Data – Volatile Organic Compounds and Petroleum Hydrocarbons

Table 9: Maximum Soil Concentration Data –Organochlorine Pesticides and Polychlorinated Biphenyls

Table 10: Maximum Groundwater Concentration Data – Metals and Inorganics

Table 11: Maximum Groundwater Concentration Data – Polycyclic Aromatic Hydrocarbons

Table 12: Maximum Groundwater Concentration Data – Volatile Organic Compounds and Petroleum Hydrocarbons

Table 13: Summary of Southeast Quadrant Pre-Remediation Soil Sampling For Barium and Chromium VI

Table 14: Summary of Southeast Quadrant Pre-Remediation Soil Sampling For Methylene Chloride

Table 15: Summary of Southeast Quadrant Pre-Remediation Soil Sampling For PAHs

Table 16: Remedial Excavation Summary

Table 17: Soil Confirmatory Sample Results



Date: June 30, 2015

6

1 Introduction

In accordance with the requirements of Ontario Regulation (O.Reg.) 153/04 (as amended), Part XV.1 of the

Environmental Protection Act, a Phase Two Conceptual Site Model (CSM) was developed for the property

located at 6330 16th Avenue, Markham, Ontario (hereinafter referred to as the Site or the RSC Property in

support of a Record of Site (RSC) submission. The Site is a 3.9 hectare (ha) property located at the

northeast corner of 16th Avenue and Williamson Road, in an area of predominantly residential, and to a

lesser extent, commercial and institutional development. The Site is a former agricultural property that has

been vacant since 2008 and has been re-zoned for residential land use. The Site is currently undeveloped

with the exception of heritage farmhouse that has been unoccupied since 2008. The Site is proposed for

residential redevelopment consisting of 158 single family housing units and the aforementioned heritage

farm house. Further details on the Site are provided in the site description provided in Section 1.3 below.

In support of the RSC submission, Phase One and Phase Two Environmental Site Assessments were

conducted at the Site by exp Services Inc (exp) in 2014 and 2015. Previous Phase Two ESAs/subsurface

investigations were conducted by Soil Engineers Ltd of Toronto in 2007 and 2013. Remedial excavation

works were completed at by exp on February 3, 2015 to address four borehole/monitoring well locationss

where one or more of barium, chromium VI, methylene chloride and polycyclic aromatic hydrocarbons

(PAHs) were identified as contaminants of concern (COCs) in soil. Based on the results of confirmatory

soil sampling conducted in conjunction with the remedial excavation programs, the aforementioned

borehole/monitoring locations were remediated to meet the applicable Ontario Ministry of the Environment

Climate Change (MOECC) Table 8 Generic Site Condition Standards (SCS) for use within 30 of a water

body in a potable groundwater condition. The Phase Two CSM presented herein provides a narrative,

graphical and diagrammatic description of the conditions of the RSC Property both prior to and after the

remediation works. The information presented in the CSM includes:

Description of the Site and its features

Locations of potential contaminating activities (PCAs) which may have contributed to an area of

potential environmental concern (APEC) at the Site;

Locations of APECs on Site;

Summaries of previous subsurface investigations

Subsurface structures affecting contaminant distribution (if any);

Site geologic and hydrogeologic characteristics;

Contaminants of concern (COCs) and their distribution in Site environmental media;

Contaminant release mechanisms and transport pathways;

Human and ecological receptors located on, in or under the RSC Property, receptor exposure

points and routes of exposure.

A Site location plan and a Site investigative location plan is provided in Figures 1 and 2, respectively. A

copy of a signed survey plan showing and identifying the boundaries of the “Phase One”, Phase Two” and



Date: June 30, 2015

7

“RSC” properties, which are all identical is provided in Figure 3. A copy of the signed survey plan is also

provided in Attachment A.

1.1 Environmental Reports

The Phase Two CSM was developed from the information provided in the following Site environmental

reports:

“Phase I And II Environmental Site Assessment, Proposed Residential Site Development, 6330 16th Avenue, Town of Markham”, Soil Engineers Ltd, March 18, 2008. (Soil Eng. 2008a).

“A Soil Investigation For Proposed Residential Development, 6330 16th Avenue, Town of Markham”, Soil Engineers Ltd, March 2008, (Soil Eng. 2008b).

“Phase Two Environmental Site Assessment, Proposed Residential Site Development, 6330 16th Avenue, City of Markham”, Soil Engineers Ltd., January 29, 2013. (Soil Eng. 2013a).

“Results of Chemical Analysis of Soil, Sediment and Ground Water Samples, Proposed Residential Site Development, 6330 16th Avenue, City of Markham”, Soil Engineers Ltd, June 21, 2013. (Soil Eng. 2013b).

“Results of Chemical Analysis of Soil, Sediment and Ground Water Samples, Proposed Residential Site Development, 6330 16th Avenue, City of Markham”, Soil Engineers Ltd, July 4, 2013. (Soil Eng. 2013c).

“Soil Sampling and Chemical Analysis, Proposed Residential Site Development, 6330 16th Avenue, City of Markham”, Soil Engineers Ltd, September 25, 2013. (Soil Eng. 2013d).

“Results of Soil Delineation Program, Proposed Residential Site Development, 6330 16th Avenue, Town of Markham”, Soil Engineers Ltd, November 1, 2013. (Soil Eng. 2013e).

“Phase Two Environmental Site Assessment, Proposed Residential Development, 6330 16th Avenue, City of Markham”, Soil Engineers Ltd, Revised November 20, 2013. (Soil Eng.2013f).

Phase One Environmental Site Assessment, 6330 16th Avenue, Markham, Ontario, exp Services Inc, Revised April 2015.

Phase Two Environmental Site Assessment, 6330 16th Avenue, Markham, Ontario, exp Services Inc, Revised April 2015.

2 Potential Contaminating Activities and Areas of Potential Environmental Concern

2.1 Potential Contaminating Activities

The exp 2015 Phase One ESA identifying potentially contaminating activities (PCAs) within the Phase

One Study Area (i.e. within 250 m of the Site/RSC Property) possibly associated with historic

operations/land uses both on- and off-Site.

The PCAs, along with their map reference number (see Figure 4a), and item number (in parenthesis) as

listed in Table 2, Schedule D of O. Reg. 153/04 (as amended) are as follows:

On-Site

P1 (28) Gasoline and Associated Products in Fixed Tanks.



Date: June 30, 2015

8

P2 (30) Importation of Fill of Unknown Quality

P3 (40) Pesticides (including Herbicides, Fungicides and Anti-Fouling Agents)

Manufacturing, Processing, Bulk Storage and Large-Scale Applications.

Off-Site

P4 (30) Importation of Fill of Unknown Quality

P5 (58) Waste Disposal and Waste Management, including thermal treatment, landfilling

and transfer of waste, other than use of biosoils as soil conditioners.

P6 (37) Operation of dry cleaning equipment (where chemicals are used)

2.2 Areas of Potential Environmental Concern

Potentially contaminating activities identified on Site and within 150 m north/northeast (i.e. potentially

upgradient of the Site, refer to Section 5) were considered to have contributed to an APEC at the Site.

Based on the assessment of the Site conditions, four PCAs including P1, P2, P4 and P5 (see Section 2.2)

were identified as contributing to an APEC at the Site as summarized as follows:

A1 Southeast Site quadrant in vicinity of existing house – Fuel oil above ground storage tank (AST,

PCA 1)

A2 North Portion of Site – Fill material of unknown quality both on- and off-Site (i.e. potential

leaching), and, former municipal solid waste landfill, 150 to 200 m north/northeast of Site (PCAs

P2, P3 and P5)

The locations of the APECs are shown on Figure 4b. Potential COCs that may be associated with APEC

A1 are PHCs/BTEX (petroleum hydrocarbons/benzene, toluene, ethylbenzene and xylenes). Potential

COCs that may be associated with APEC 2 are metals and inorganics, polycyclic aromatic hydrocarbons,

PAHs, PHCs/BTEX and volatile organic compounds (VOCs).

2.3 Subsurface Structures and Utilities, and, Contaminant Transport

The Site is currently undeveloped apart from the unoccupied heritage farmhouse located in the northern

portion of the southeast quadrant (Refer to Figure 2 and Section 3, below). Underground utility services

currently found on the Site consist of water, sewer and natural gas lines extending north from 16th Avenue

and parallel to the laneway leading to the heritage farmhouse. Based on the assessment of the locations,

where COCs were formerly found at the Site (i.e., single borehole/monitoring sample locations to the north

and west of the utilities), the distribution and transport of the former COCs was not affected by the

farmhouse subsurface structure or buried utilities.



Date: June 30, 2015

9

3 Physical Setting of Phase Two/RSC Property

3.1 Site Description

The Phase Two Property is located in the north central portion of the City of Markham at the northeast

corner of the intersection of Williamson Road and 16th Avenue. The Site encompasses an approximate 3.9

hectare (ha) parcel of land extending north from 16th Avenue and east from Williamson Road to the AMICA

retirement community residence located at 6360 16th Avenue. The Site is located in an area of residential

and institutional development, and is zoned for residential land use. The Site is bounded by 16th Avenue

and residential properties to the south, Williamson Road and residential properties to the west, vacant land

and Swan Lake to the north, and, by Swan Lake and residential development to the east. A Site location

plan is presented in Figure 1. The configuration of the Site is illustrated in the investigative location plan

presented in Figure 2.

The Site is a vacant former agricultural property, which was used for such purposes from the approximate

late 1800s to the late 1900s. The Site was used for residential purposes up until 2007 and has been vacant

since 2008. The southeast quadrant of the Site is occupied by a two storey - historic farm house with

basement that was reportedly constructed in the mid-1800s. The farm house has a basement foot print of

approximately 342 square metres (m2). A fuel oil above storage tank (AST) is located in the basement of

the farm house. Access to the house is via an asphalt pavement driveway extending approximately 200 m

north from 16th Avenue.

Former structures found at the Site, all located in the vicinity of the farm house, include a 297 m2 barn

without basement constructed in 1934 and a 55 m2 barn, also without basement, constructed in 1940. Other

former structures included a silo constructed in 1935 and three (3) small sheds, also reportedly constructed

in 1935 (Soil Eng. 2013a). The above grade portions of these structures were demolished in 2014.

Remnant concrete pads are located to the north of the farm house.

The Site borders Swan Lake, a man-made surface water body created from gravel taking operations in the

1960s and 1970s. Swan Lake, the major surface water body located in the immediate vicinity of the Site, is

groundwater fed and is considered part of the Rouge River drainage system. The perimeter of the lake

was reportedly in filled with construction materials during the early 1980s. A historic municipal solid waste

landfill was reportedly located approximately 150 to 200 m north of the Site along the north shore of present

day Swan Lake.

The legal description of the Site is PARTS 1, 3, 4 and 5, PART OF CENTRE 80 ACRES of LOT 16

CONCESSION 8, CITY OF MARKHAM, REGIONAL MUNICIPALITY OF YORK. Figure 3 presents a copy

of a signed legal survey encompassing the Site and depicting its boundaries. Highlighted and identified in

Figure 3 are the boundaries of the Phase One, Phase Two and RSC Properties, which are identical.

The Site Property Identification Number is the 03061-4280 (LT).

The Site roll number is 36030231608000000000

The owner of the Site is Stargrande Custom Homes Corp of Concord, Ontario.



Date: June 30, 2015

10

The approximate Universal Transverse Mercator (UTM) coordinates of the Site centroid are 4861722 N and

640192E (NAD83 17). The UTM coordinates were based on Global Positioning System (GPS)

measurements obtained from Google Earth geographic information system website.

3.2 Current and Proposed Future Uses

At the time of the investigation, the Site was a vacant former agricultural property and was occupied by a

historic farm designated as a heritage building. The Site is zoned for residential land use and is proposed

for re-development for residential purposes consisting of approximately 158 single detached town houses.

Thus the most recent land use of the Site for the purposes of this Phase Two CSM is agricultural and other.

3.3 Surface Features

The Site is characterized by gentle sloping and, in some areas, by occasional undulating terrain. The

surface topography of the eastern half of the Site, with the exception of the bank bordering Swan Lake is

relatively flat with a gentle northeast to southwest slope. The lake shore line is heavily vegetated marked

by a steep bank, the top of which is 2 to 3 m higher in elevation than the lake surface. The topography of

the approximate western half of the Site is characterized by a gentle to increasing slope to the west and

southwest. The topography of the general Site area is illustrated in the Site Location plan presented in

Figure 1.

Remnant trees are found in the vicinity of the farm house and along 16th Avenue, part of a former treed

area and orchid located within the southeast Site quadrant. Deciduous trees are found along the shoreline

of Swan Lake. The remaining portions of the Site are covered with vegetation consisting of grasses and

shrubs.

3.4 Site Stratigraphy/Geology

This section provides a description of the Site stratigraphy/geology as inferred from mapping and Site

observations.

Regional geological maps show that overburden materials found in the general Site area consist of clay to

silt-textured till derived from glaciolacustrine deposits or shale. Ice-contact stratified deposits of sand and

gravel, minor silt, clay and till, also may be found within the general Site area. The expected depth to

bedrock within the general area is 56 m with the upper bedrock consisting of upper Ordivician-aged grey

and black shale of the Whitby Formation.

The Site geologic and hydrogeologic conditions were further evaluated from an assessment of soil cores

recovered during previous Site subsurface investigations. Figure 6 presents a Site plan showing the

locations of three geologic cross-sections (AA’, BB’ and CC’) prepared from Site borehole logs and

presented as Figures 7a through to 7c. Figure 6 also references four smaller cross-sections (DD’ thtugh

to GG’) shown on Figure 7d and depicting the stratigraphy at four borehole/monitoring samplings locations

in the eastern portion of the Site, where COCs were identified in soil (refer to Section 6). Cross Sections

AA’ and BB’ are oriented perpendicular and Cross Section CC’ is oriented parallel to the inferred direction



Date: June 30, 2015

11

of groundwater flow in the first water bearing unit. Depths to the water table are shown on the cross-

sections and the inferred direction of groundwater flow in Sections AA’, BB’ and CC’. The Site conditions

are summarized in Table 1 and a summary of the overburden stratigraphy is also provided in Table 2.

The overburden stratigraphy of the Site consists generally of surficial topsoil underlain by silty sand fill

material or deposits of native silty sand, and, underlying deposits of sand. The silt sand fill material is

encountered in the approximate northern/northeast third of the Site. The fill material varies from

approximately 0.7 m (SGP3) to 2.67 m (BH211/MW) in thickness and extends to depths of up to

approximately 3.2 m bg (Cross Sections AA’ and BB’). Thicker fill deposits are generally encountered in

the northern portion of the Site towards the north property boundary and Swan Lake. The fill material is

generally underlain by deposits of medium to fine silty sand varying from 0.8 m (BH214) to 2.7 m in

thickness (BH211/MW) and extending to depths of up to least 5.98 m bg (BH211/MW). At BH212 in the

northeast portion of the Site, the fill material is underlain by a layer of gravelly sand, 4.7 m in thickness and

extending to a depth of 7 m bg.

The near surface native silty sand/sand deposits are encountered in the approximate southern two thirds

of the Site. These deposits vary from 3.0 (BH204/MW) to 4.0 (BH203/MW) m in thickness and extend to

depths of from 4.0 to 5.0 m bg. (Cross Sections BB’ and CC’). The silty sand, for the most part, is underlain

by sandy silt till, which at the deepest borehole, BH212, is 4.4 m in thickness and extends to 11.3 m bg to

underlying clayey silt till. This layer is at least 3 m in thickness and extends to the maximum depth

investigated of 14.4 m bg.

A 0.3 m thick layer of gravelly sand overlying sandy silt till is encountered at BH209/MW in the northern

portion of the Site. At BH203 in the southern portion, a 0.1 to 1.6 m thick sand deposit is encountered,

which extends to underlying sandy silt till. In the west central portion of the Site (BH206/MW and

BH207/MW), the fill material is underlain by sandy silt till varying from 1.5 to at least 2.7 m in thickness and

extending to the maximum depth investigated in this area of 5 m bg.

3.5 Site Hydrogeology

The groundwater table beneath the Site is encountered within the silty sand/sand deposits and portions of

the silty sand fill at an approximate depth of from 0.15 to 0.8 bg at monitoring well BH201-MW in the

southeast corner to approximately 3.5 m bg in the northeast area at monitoring well BH212-MW. Saturated

conditions are found within the silty sand fill, native silty sand, sand and gravelly sand deposits and extend

into the underlying sandy silt till. The water table unit is under unconfined conditions. At deep monitoring,

BH212/MW, which is screened within the sandy silt till, saturated conditions extend to the maximum depth

of this layer at 11.4 m bg giving a saturated thickness of approximately 8 m. The underlying - less

permeable - clayey silt till, which extends to the maximum depth investigated of approximately 14.3 m bg,

is an inferred confining layer. Monitoring well completion details including the geological units intercepted

are provided in Table 3.

Based on local topography, groundwater flow across the Site is anticipated to be in the south/southwest

direction towards a tributary of the Rouge River, located approximately 1.0 km south/southwest of the Site.

Local groundwater may also be influenced by Swan Lake, which as previously noted, is a man-made lake

created from historic gravel taking operations that extended below the groundwater table. As interpreted



Date: June 30, 2015

12

from groundwater elevation contours developed from groundwater levels recorded in March, June and

October, 2014, the inferred direction of groundwater flow in the water table unit is to southwest. (Figures

8a though to 8c). Swan Lake surface water elevations evaluated in June and October 2014 were higher

than groundwater elevations of nearby monitoring wells indicating the direction of water flow is from the

lake to the water table unit (Figures 8b and 8c).

Saturated hydraulic conductivity values estimated from single well response test conducted at monitoring

wells BM202/MW and BH209/MW and Hvorslev’s solution for unconfined aquifers were 1.43 x 10-7 m/s and

8.5 x 10-5 m/s, with a geometric mean value of 7.35 x 10-6 m/s. The estimated linear groundwater velocity,

as calculated from the Darcy relationship using the highest estimated hydraulic conductivity value of 8.5 x

10-5 m/s, the geometric horizontal hydraulic gradient of 0.014 m/m, and an assumed effective porosity of

25 % for sands, is 74 m/yr. The estimated vertical hydraulic gradient in the water unit as evaluated between

monitoring wells BH11/MW and BH12/MW was 0.06 m/m in the downwards direction.

Nine existing or former water wells, as determined from water well records, were located within 250 m of

the Site (i.e. Phase One Study Area). Three of the water wells were listed as domestic supply wells and

one as a livestock supply well. Based on the locations of these wells within current residential development

and undeveloped lands in the case of the supply well, it is unlikely that they are still in existence or being

used for their intended purposes. The remaining wells were listed as either being abandoned or as

observation wells. The locations of the existing/former water wells located within the Phase One Study

Area are shown in Figure 13.

3.6 Approximate Depth to Bedrock

Based on geological mapping, the approximate depth to the bedrock beneath the RSC Property is 56 m

bg.

3.7 Approximate Depth to Water Table

Based on the water level measurements recorded at on-Site monitoring wells, the depth to the water table

beneath the RSC Property ranges from 0.15 to 0.8 bg at monitoring well BH201-MW in the southeast corner

to approximately 3.5 m bg in the northeast area at monitoring well BH212/MW.

3.8 Site Condition Standards and Proximity to (i.e. 30 metres within) a Water Body

The northeast portion of the Site is located adjacent to Swan Lake, a man made water body created from

gravel taking operations that extended below the groundwater table. Swan Lake covers an approximate

area of 4 ha and is the major water body located within the immediate vicinity of the Site. The southeast

portion of the lake has an overflow spillway and, reportedly, is part of the Rouge River drainage system and

ultimately, Lake Ontario. As such, Section 43.1 of O.Reg. 153/04 (as amended), pertaining to site

conditions standards, shallow soil property or water body, applies to the Site. In specific terms, as

described in Section 43.1 of O.Reg 153/04, the Site is “adjacent to or includes land that is located within 30

metres of a water body”. Based on the setting of Swan Lake, the Site is considered to lie within the 30 m

of a surface water body as defined under O.Reg. 153/04.



Date: June 30, 2015

13

With respect to Section 41 of O. Reg 153/04 (as amended) pertaining to site condition standards and

environmentally sensitive areas, the Site is not located within, adjacent or within 30 m of an area of natural

significance. Also, pH measurements recorded for Site surface soil samples are not less than 5 or greater

than 9, and, subsurface soil pH measurements are not less than 5 or greater than 11. As such, Section 41

of O.Reg. 153/04 (as amended) does not apply to the RSC Property.

The specific rationale for the selection of the Site Condition Standards applicable to the Site is as follows:

The Site is a former agricultural property proposed for re-development for residential land use. It

is located within the Region of York (Region), which obtains potable water sourced from

groundwater and Lake Ontario via the City of Toronto. The Region requires the application of

potable groundwater SCS for assessing soil, groundwater and sediment quality. The Region,

however, has a process whereby an applicant can apply for the use of non-potable groundwater

conditions at a Site if it does not meet any of the following four conditions:

1. One or more of the properties within a 500 m radius of the subject site are not municipally

serviced;

2. The subject site is located within a wellhead protection area;

3. There is a potential for impacts to private wells located within a 500 m distance of the

property boundaries of the subject site; and

4. The subject site is located within an area of high groundwater vulnerability and on the Oak

Ridges Moraine.

A formal application has not been made to the Region of York for use of the non-potable SCS,

potable groundwater SCS for the Site. Therefore, potable groundwater SCS are applicable to the

Site for evaluating environmental quality data.

The Site is not a sensitive Site as defined under Section 41 of the Regulation with respect to

proximity to an Area of Natural or Scientific interest as identified by the Ministry of Natural

Resources.

As inferred from borehole logs, the Site has an overburden thickness in excess of 2 m and

therefore, it is not considered to be a shallow soil property as referenced by Section 43 of O.Reg.

153/04 (as amended).

As inferred from borehole logs, the Site overburden stratigraphy, in general, is comprised of topsoil

underlain by silty sand fill or native material consisting of sandy silty sand/gravelly sand/sand. Grain

size analysis performed by exp on a sample of the silty sand native material (borehole BH204/MW,

depth interval of from 2.2 to 3.1 m bg) and a sample of the native sand and gravel (BH212/MW, 3.0

to 3.6 m bg) reported results with less than 50 percent by weight of particles with diameters less

than 75 µm. Therefore, based on these results and the general observations of the overburden

stratigraphy, the Site is considered to lie within a coarse textured soil condition as referenced in the

Regulation.

Soil pH measurements for surface (depths less than 1.5 m bg) and subsurface (depths greater than

1.5 m bg) soil samples collected from the Site were within acceptable ranges (5 to 9 and 5 to 11,



Date: June 30, 2015

14

respectively) for non-sensitive Sites as referenced by Section 41 of O.Reg. 153/04 (as ameneded)

The nearest surface water body, Swan Lake, is located adjacent to the Site/RSC Property.

Therefore, with respect to the Site, Swan Lake is located less than the 30 m minimum distance to

a water body evaluated by the MOECC where attenuation of solute transport in groundwater by

dispersion and other mechanisms is assumed to occur. As such, the RSC Property is adjacent to

or lies within 30 m of a water body

Based on the above considerations, the applicable SCS for the Site are the Table 8 generic SCS for use

within 30 m of a water body in a potable groundwater condition (residential/ parkland/ institutional /

industrial/ commercial/ community property use).

4 Summary of Subsurface Investigations and Remedial Works

Between October 2007 and November 2013, two (2) Phase Two ESAs and three (3) soil/groundwater

sampling programs were conducted at the Site by Soil Engineers Ltd (Soil Eng.) of Toronto, Ontario.

Between March and November 2014, a Phase Two ESA, a groundwater sampling program, and a test pit

soil delineation program were conducted at the Site by exp. These programs were undertaken to assess

the soil and/or groundwater of the identified APECs for potential COCs and delineate the extent of the

COCs identified at the Site. The investigative programs were followed by a remedial excavation program

conducted by exp on February 3, 2015 to address the presence of COCs including one or more of barium,

chromium VI, methylene chloride and PAHs at four (4) borehole/monitoring well locations in the eastern

portion of the Site (Refer to Sections 6 and 7).

The Soil Eng. environmental reports are listed in Section 1.2 above and brief summaries of these

investigations and their findings are present below to provide background information with respect to the

assessment of the APECs in Section 5 below.

Soil Eng. (2008a) Phase I And II ESA

Nine (9) boreholes (BH1 to BH9) were advanced at the Site including four (4) boreholes (BH4, BH6

to BH8) for assessment of environmental conditions. Boreholes BH6 to BH8 were located in the

northeast portion of the Site adjacent to Swan Lake and advanced to depths of from 10.4 to 15.4

metres below grade (m bg) and instrumented as monitoring wells screened within the silty sand fill

and native sand, or, native silty clay.

The Site stratigraphy in general consists of top soil underlain by silty sand fill, fine to coarse sand,

gravelly sand, sandy silt and clayey silt till. Silty sand fill was encountered at one borehole location

(BH6) advanced in the vicinity of Swan Lake.

Groundwater levels recorded in the monitoring wells ranged from 4.42 to 5.18 m bg.

Seven (7) soil samples of the silty sand fill, sandy silt, sand or clayey silt were collected for the

analysis of one or more of metals and inorganics, VOCs and PAHs at depth intervals ranging

between 0.8 to 1.1 m bg and 4.6 to 4.9 m bg



Date: June 30, 2015

15

Groundwater samples were collected from the three monitoring wells for analysis of one or more

of metals and inorganics, VOCs and PAHs.

Analytical data was evaluated against the Ontario Ministry of the Environment (MOE, 2004) Table

2 Site Conditions Standards (SCS) for Residential Land use and met the applicable SCS in all

cases.

Methane gas levels were measured in the monitoring wells using a combustible gas meter and

were recorded in the 100 ppm (parts per million) range and below the alert level of 10% of the lower

explosive limit of 50,000 ppm (5 vol%).

Soil Eng. (2013b) Soil Investigation Report

Nine (9) boreholes (BH1 to BH9) were advanced to depths of from 10.4 to 15.4 m bg between

October 11 to October 15, 2007 in conjunction with the Soil Eng. (2008) Phase I ESA.

Three (3) boreholes (BH6 to BH8, see Soil Eng. 2008a) were instrumented as monitoring wells

screened within the silt sand /sandy silt deposits in the northern portion of Swan Lake.

The Site overburden stratigraphy generally consisted of topsoil overlying fine to coarse sand and

underlying silty fine sand and sandy silt extending to depths of from 2.4 to 7.9 m bg. These coarse

textured deposits were underlain by finer textured silty clay till embedded with cobbles and

boulders. Fine to coarse gravely sand was encountered above the silty clay tills within the

boreholes advance near Swan Lake.

Soil Eng. (2013a) Phase Two ESA

Soil and groundwater analytical data were evaluated against the MOE (2011) Full Depth Table 8

Site Condition Standards for use within 30 m of a surface water body in a potable groundwater

condition and residential/parkland/institutional property use and the MOE (2011) Table 2 SCS in a

potable groundwater condition.

Five (5) boreholes (BH/MW1 to BH5, see Figure 2) were advanced to a maximum depth of 6 m bg

(three to 6 m bg and two to 3 m bg) including BH1 to BH3 in the northern portion of the Site to

assess the quality of fill materials and the potential for landfill related impacts, BH4 near the existing

residential structure to assess for potential soil impacts associated with the presence of the fuel oil

AST and BH5 in the southern portion to assess for road salt derived impacts.

Boreholes BH/MW1, BH/MW2 and BH/MW4 were instrumented as monitoring wells screened

within the silty sand fill/native sand.

Soil and groundwater samples were collected for the analysis of metals and inorganics, PAHs,

PHCs and VOCs, and, one soil sample from BH5 for analysis of organochlorine pesticides.

Samples of the silty sand/silt clay fill and silty clay were collected at depth intervals ranging between

0.0 to 1.6 and 4.6 to 6.1 m bg.

Based on groundwater level measurements, the inferred groundwater flow direction was to the

south.

Three (3) parameters including methylene chloride (BH3) barium (BH5) and chromium VI (BH/MW4

and BH5) were detected at concentrations in excess of the MOE (2011) Table 8 SCS.



Date: June 30, 2015

16

Trichloroethylene was detected in groundwater samples collected from monitoring wells BH/MW1,

BH/MW4 and existing monitoring well EXT/MW6 at concentrations that exceeded the Table 8 and

Table 2 SCS.

Methane gas levels were measured at three soil vapour extraction wells located adjacent to

monitors BH/MW1, BH/MW2 and EXTMW6, which were reportedly screened below the

groundwater table and readings of 0 parts per million (ppm) were recorded.

Soil Eng (2013b) Letter Report

One (1) shallow soil sample (SA3, refer to Figure 2) was collected for analysis of metals and

inorganics, PAHs and VOCs, and, two groundwater samples from monitoring wells BH/MW1 and

BH/MW2 for analysis of PHCs metals and inorganics, and, VOCs including TCE.

The analytical results were compared to and met the MOE (2011) Table 1 Background SCS for soil

and groundwater.

Two (2) sediment/ soil samples were collected off-Site from Swan Lake (1.0 m from shore and from

0 to 0.5 m below the lake bottom) and assessed for metals, PAHs and PHCs/BTEX.

Soil Eng (2013c) Letter Report

Same information presented as the Soil Eng. (2013d) letter report.

Soil Eng. (2013d) Letter Report.

Five (5) surficial soil samples (TP1 to TP4, 0.2 to 0.5 m bg, refer to Figure 2) were collected across

the Site for analysis of metals and inorganics.

The analytical results were compared to and met the MOE (2011) Table 1 Background SCS.

Soil Eng. (2013e) Letter Report.

Five (5) test pit soil samples (SA1 to SA5) were collected at depths between 0.5 and 0.7 m bg in

the vicinity of borehole BH3 for analysis of methylene chloride.

The analytical results met the MOE (2011) Table 1 Background SCS.

Soil Eng. (2013f) Revised Phase Two ESA Report

This report provided consolidation of the information presented in the Soil Eng. January 2013

Phase Two ESA and the supplemental investigative activities conducted during 2013.

The locations of the Soil Eng. borehole, monitoring well and test pit/soil sampling locations are identified in

the investigative location plan provided in Figure 2.



Date: June 30, 2015

17

As noted above, soil sampling, groundwater sampling, test pit soil delineation and remedial excavation

programs were conducted at the Site by exp between March 2014 and February 2015. The findings of

these programs are summarized and discussed in exp 2015 Phase Two ESA Report and are summarized

below:

Soil samples were collected from fourteen (14) borehole/monitoring well locations (BH201/MW

through to BH214, refer to Figure 2) advanced to a maximum depth of approximately 14 m bg

during the March 2014 investigative program for analysis of metals and inorganics, PAHs, PHC

fractions F1 to F4/BTEX, VOCs organochlorine pesticides (OCPs) and total polychlorinated

biphenyls (PCBs).

Five (5) of the boreholes/monitoring wells (BH209/MW through to BH214) were located in the

northern third of the Site/APEC 2 (see Section 2) to further assess the silty sand fill, and, native

silty/gravelly sand and sandy silt till for potential COCs.

Two (2) boreholes/monitoring wells (BH204 and BH205/MW) were located within APEC 1 (see

Section 2) to assess for the potential presence of PHCs/BTEX in soil and groundwater.

Eleven (11) of the boreholes advanced at the Site were instrumented as monitoring wells

(BH201/MW through to BH204/MW and BH205/MW through to BH212/MW) screened within the

water table aquifer unit at screen intervals ranging between 1.5 and 4.5 m bg and 9.1 to 12.1 m bg.

Four (4) of the monitoring wells (BH209/MW through to BH212/MW were located within APEC 2 to

further assess groundwater for the potential presence of VOCs and one monitoring well was located

within APEC 1 (BH204/MW) to further assess groundwater for PHCs/BTEX. Six (6) monitoring

wells (BH201/MW through to BH203/MW and BH206 through to BH208/MW) were located in the

southern half of the Site including three along the downgradient property boundary to assess for

the potential presence of VOCs.

Contaminants of concern were not detected in the soil sampled during the March 2014 borehole

investigative program at concentrations in excess of the MOECC Table 8 SCS.

Sampling of the Site monitoring well network consisting of the eleven new and three existing

monitoring wells was conducted over the course of three seasonal events completed in April, June

and October 2014 for VOCs including trichloroethylene. Reported concentrations for all assessed

parameters less than laboratory reporting detection limits (RDLs) and the MOECC Table 8 SCS.

A delineation test pit program was conducted in November 2014 to further assess the potential

presence of barium and/or chromium VI at two locations (BH4/MW and BH5, see Figure 2) in the

southeast quadrant. Reported concentrations of the assessed parameters were less than

laboratory RDLs and the Ministry of the Environment and Climate Change (MOECC, formerly MOE)

Table 8 SCS.

A remedial excavation program was conducted on February 3, 2015, which consisted of the

removal and off-Site disposal of approximately 120 tonnes of soil in the vicinity of four Site



Date: June 30, 2015

18

borehole/monitoring well locations (BH3, BH/MW4, BH5 and EXT/MW6, refer to Figure 5) where

one or more of barium, chromium VI, methylene chloride and PAHS were potentially present at

concentrations in excess of the MOECC Table 8 SCS. Confirmatory soil sampling conducted in

conjunction with the excavation program reported concentrations of the assessed parameters that

were less than laboratory RDLs and the MOECC Table 8 SCS.

The direction of groundwater flow in the water table unit across the Site as inferred from

groundwater level measurements recorded during the March, June and October 2014 monitoring

events is to the southwest (refer to Figures 8a through to 8c). The surface water elevations of

Swan Lake determined during the June and October 2014 monitoring events were higher than

corresponding groundwater elevations indicating that there is a net flow of water from the lake to

the water table unit.

The maximum and geometric mean saturated hydraulic conductivity estimated for the water table

from single well response tests performed at select monitoring well locations were 8.51 x 10-5 m/s

and 4.09 x 10-5 m/s, respectively. Based on the maximum estimated saturated hydraulic

conductivity and the geometric mean horizontal hydraulic gradient estimated from the June 2014

field observations, the estimated linear groundwater velocity in the water table unit is 74 m/yr.

Methane and hydrogen sulphide gas were not detected during field instrument monitoring of the

soil gas probes (SGP1 through to SGP3, refer to Figure 2) installed in March 2014 along the north

property boundary and the northeast portion of the Site.

5 Assessment of Areas of Potential Environmental Concern

Potential COCs in the soil and groundwater of the Site APECs were assessed as part of exp’s 2014 Phase

Two ESA, groundwater sampling and test pit delineation programs as well as previous intrusive

investigations conducted at the Phase Two Property by Soil Eng in 2007, 2012 and 2013. The assessment

of potential COCs in soil is summarized in Table 4 and discussed in Section 5.1 below. The assessment

of potential COCs in groundwater is summarized in Table 5 and discussed in Section 5.2 below.

5.1 Assessment of Soil COCs

Soil at the Phase Two Property including within the identified APECs was assessed for the potential

presence of COCs that may be associated with PCAs both on and off-Site. Soil samples were collected

from 44 borehole, monitoring well, surface soil and test pit locations for the analysis of one or more of metals

and inorganics, PHCs, PAHs, VOCs and OC pesticides and PCBs (Refer to Figure 2 and Table 4). The

soil sampling is summarized in as follows:



Date: June 30, 2015

19

Three (3) samples (depth intervals between 1.55 to 2.25 and 3.0 to 4.0 m bg) of the silty sand from

three borehole locations for analysis of PHCs/BTEX to assess APEC A1 (i.e. fuel oil AST) ;

Thirteen (13) samples including of the topsoil (3 locations, 3 samples 0.2 to 0.5 m bg), silty sand

fill ( 5 locations, 7 samples, between 0.8 to 1.6 and 1.5 to 3.0 m bg) and native silty sand/sand/silty

clay till (3 locations, 3 samples, 0.8 to 1.1 and 4.6 to 4.7 m bg) in the northern third of the Site for

analysis of metals and inorganics to assess APEC A2;

Ten (10) samples including of the silty sand fill (5 locations, 5 samples, between 0.76 to 1.52 and

3.0 to 3.5 m bg) and of the silty sand/ gravelly sand/sand/silty clay till (4 locations, 4 samples,

between 2.15 to 2.76 and 4.6 to 4.9 m bg) in the northern third of the Site for analysis of VOCs to

assess APEC A2.


3.0 to 3.5 m bg) and of the silty sand/ gravelly sand/sand/sandy silt till (6 locations, 6 samples,

between 3.0 to 3.5 and 4.6 to 6.1 m bg) for analysis of PAHs to assess APEC A2

Four (4) samples from four locations including two of the topsoil (0.0 to 0.76 m bg) between 0.8

to 1.6 and 1.5 to 3.0 m bg) and one of the silty clay (1.6 to 2.3 m bg) in the southern half of the

Site and one of the topsoil (0.0 to 0.76 m bg) in the northern portion of the Site for analysis of

OCPs

One (1) sample of the topsoil (0.0 to 0.76 m bg) in the southern half of the Site for analysis of

PCBs;

One (1) sample of the silty clay (4.6 to 6.1 m bg) in the northern third of the Site for analysis of

PHCs to assess APEC 2.

Eight (8) samples including of the topsoil (2 locations, 2 samples 0.2 to 0.5 m bg, silty clay fill

(near house, 2 locations, 2 samples, 0.0 – 1.6 m bg) and the silty sand (4 locations, samples

between 0.76 – 1.52 m bg) in the southern two-thirds of the Site for analysis of metals and

inorganics;


3.0 to 3.5 m bg) and of the silty sand/ gravelly sand/sand/silty clay till (4 locations, 4 samples,

between 2.15 to 2.76 and 4.6 to 4.9 m bg) in the northern third of the Site for analysis of VOCs to

assess APEC A2.

Five (5) shallow test pit samples in the vicinity of borehole BH3 in the northeast portion of the Site

to assess the potential presence of methylene chloride.

Four (4) shallow test pit samples in the vicinity of borehole BH4 in the southeast Site quadrant to

delineated the potential presence of chromium VI;

Four (4) shallow test pit samples in the vicinity of monitoring well BH4/MW in the southeast the

Site quadrant to delineated the potential presence of barium and chromium VI;



Date: June 30, 2015

20

Sampling of the Site soils prior to exp’s March 2014 investigative program identified four

borehole/monitoring well locations where one or more parameters were found to be present in soil at

concentrations in excess of the MOECC Table 8 SCS including:

Chromium VI in shallow soil at borehole BH3;

Barium and chromium VI at monitoring well BH/MW4;

Methylene chloride at borehole BH3; and

PAHs at monitoring well EXT/MW6.

The borehole/monitoring well locations where these parameters were detected in excess of the Table 8

SCS are identified in Figures 5a (barium and chromium VI), 5b (methylene chloride) and 5c (PAHs) along

with sample depth intervals and reported concentrations.

The potential presence of chromium VI in the vicinity of BH5, and, barium and chromium VI in the vicinity

of BH/MW4 was assessed in exp’s November 2014 test pit soil delineation programs. The potential present

of PAHs in the vicinity of EXT/MW6 was assessed in the exp March 2014 investigative program and

methylene chloride in the vicinity of BH3 in the June 2013 test program conducted by Soil Eng. Details of

these investigative programs are summarized in Section 4 above. None of the target parameters assessed

in the delineation programs were detected at concentrations in excess of the MOECC Table 8 SCS. Based

on the results of the delineation programs conducted by exp and by Soil Eng. in the vicinity of

boreholes/monitoring wells BH3, BH4/MW, BH5 and EXTMW6, the presence of the soil COCs at

concentrations in excess of the Table 8 SCS was limited to the immediate vicinity of these locations. Cross-

sections depicting the sampling locations where the COCs were found are provided in Figure 7d (Section

DD’ - EXT/MW6, Section EE - BH4/MW, Section FF’ - BH5 and Section GG’ – BH3)

Based on the findings of the delineation programs, a remedial excavation program was conducted at the

Site by exp on February 3, 2014. Shallow excavations were completed in the vicinity of the four borehole

locations where one or more COCs were presented at concentrations in excess of the Table 8 SCS. The

excavation program, which included off-Site disposal of excavated soil materials and confirmatory soil

sampling, is described further in Section 7 below. None of the target parameters (i.e. barium, chromium

VI, methylene chloride and PAHs, were detected at concentrations in excess of the MOECC Table 8 SCS

in confirmatory soil samples collected during the February 2014 remedial excavation program.

Maximum concentrations of the parameters sampled in soil as part of the current assessment and remedial

program, and, the previous assessments/investigative activities conducted by Soil Eng. in 2007, 2012 and

2013 are summarized in Tables 6 (metals and inorganics), 7 (PAHs), 8 (VOCs and PHCs) and 9 (OCPs

and PCBs). For VOCs and volatile PHC fractions, to account for possible volatilization losses arising from

soil gas phase partitioning, data reported within the last two years was assessed.

5.2 Groundwater COCs

Groundwater at the Site including within the identified APECs was assessed for the potential presence of

COCs that may be associated with PCAs both on and off-Site. Groundwater samples were collected from

fifteen (15) monitoring wells screened within the water table aquifer for the analysis of one or more of metals



Date: June 30, 2015

21

and inorganics, PHCs, PAHs, VOCs and OC pesticides and PCBs. The groundwater sampling is

summarized in Table 5 and as follows:

Eleven (11) samples were collected from six monitoring wells installed in the northern portion of

the Site over three sampling events including October 2007, December 2012 and June 2013 for

the analysis of metals and assessment of APEC A2;

Two (2) samples were collected from two (2) monitoring wells installed in the northern portion of

the Site in October 2007, December 2012 for analysis of PAHs and assessment of APEC A2;

One (1) sample was collected from a monitoring well installed in the northern portion of the Site in

December 2012 for analysis of PAHs and assessment of APEC A2;

Two (2) samples were collected from one (1) monitoring well installed in the east central portion of

the Site in December 2012 and June 2013 for analysis of PHCs and assessment of APEC A1;

Twenty-one samples were collected from seven (7) monitoring wells located in the northern third

of Site over three seasonal events conducted in March, June 2014 and October 2014 for analysis

of VOCs including TCE and assessment of APEC 2;

Eleven (11) samples were collected from six (6) monitoring wells located in the northern third of

Site over three (3) sampling events including October 2007, December 2012 and June 2013 for

analysis of VOCs including TCE and assessment of APEC 2;

Eighteen (18) samples were collected from six (6) monitoring wells located in the northern third of

Site over three seasonal events conducted in March, June 2014 and October 2014 to for analysis

of VOCs including TCE and assessment of APEC 2; and

Eighteen (18) samples were collected from 6 monitoring wells located in the southern two thirds of

Site over three seasonal events conducted in March, June 2014 and October 2014 to for analysis

of VOCs.

Maximum concentrations of the parameters sampled in groundwater as part of the exp 2014 monitoring

program, and, the previous assessments/investigative activities conducted by Soil Eng. in 2007, 2012 and

2013 are summarized in Tables 10 (metals and inorganics), 11 (PAHs) and 12 (VOCs and PHCs). For

VOCs and volatile PHC fractions, to account for possible volatilization losses arising from soil gas phase

partitioning, data reported within the last two years was assessed.

As noted, TCE was detected at three monitoring wells including BH/MW1 (5.72 micrograms per litre (µg/L))

EXT/MW6 (4.39 µg/L) and BHMW4 (4.78 µg/L) sampled by Soil Eng. in December 2012 at concentrations

in excess of the MOECC Table 8 SCS of 1.6 µg/L in December 2012. Re-sampling of monitoring wells

BH/MW1 and BH/MW2 by Soil Eng. in June 2013 reported concentrations of TCE less than laboratory

RDLs and the MOECC Table 8 SCS. Sampling of 14 monitoring wells including six upgradient – northern

area wells by exp over the course of three seasonal events conducted in March, June and October 2014

reported concentrations of TCE less than laboratory RDLs and the MOECC Table 8 SCS. Based on the

results of the four most recent monitoring events conducted at the Site and the seasonality of these events,

TCE was not found to be present in the groundwater of the water table unit at concentrations in excess of

the MOECC Table 8 SCS.



Date: June 30, 2015

22

6 Former Contaminants of Concern/Pre-Remediation Site Conditions

This section describes the conditions of the Site with respect to the assessment of four borehole/monitoring

locations (BH3, BH4/MW, BH5 and EXTMW6, see Figures 5a through to 5c) advanced in the eastern half

of the Site where one or more of barium, chromium VI, methylene chloride and PAHs (7 parameters) were

detected at concentrations in excess of the Table 8 SCS. As noted in Section 1 and described further in

Section 7, remedial excavations were undertaken at the four borehole/monitoring well locations under the

oversight of exp on February 3, 2015 at address the COC presence in soil. Specific information is

presented in the following Sections pertaining to:

locations where former COCs were present in soil;

COCs associated with each location;

the media where COCs were found;

a description of each location;

the distribution of the COCs found at each location;

potential sources of COCs

potential for COC migration,

influence of climatic conditions; and

potential for vapour intrusion.

6.1 Sampling Locations Where COCs were Found

As noted in Section 5.1, the previous Site subsurface investigations identified four individual

borehole/monitoring wells locations (BH3, BH4/MW, BH5 and EXTMW6, see Figures 5a through to 5c)

advanced in the eastern half of the Site where one or more of barium, chromium VI, methylene chloride

and PAHs (7 parameters) were detected at concentrations in excess of the Table 8 SCS and identified as

COS. The parameters identified as COCs in soil, the sampling locations, sample depths and soil type are

summarized in the following table:



Date: June 30, 2015

23

Table 6-1: Pre-Remediation Soil Sampling Locations With Parameters Detected at Concentrations

in Excess of the MOECC Table 8 SCS

Parameter(s) Site Quadrant Borehole/Monitoring

Well Location

Sample Depth

(m bg) Soil Type

Barium and Chromium

VI

Southeast BH/MW4 0.0 - 1.6 Silty clay fill

Chromium VI Southeast BH5 0.0 -1.6 Topsoil and silty

clay fill

Methylene Chloride Northeast BH3 0.0 – 1.6 Topsoil and silty

sand fill

PAHs:

benzo(a)anthracene,

benzo(b)fluorathene,

benzo(a)pyrene,

dibenzo(a,h)anthracene,

fluoranthene,

indeno(1,2,3-cd)pyrene

pyrene

Northeast EXT/MW6 3.0 – 3.6 Silty sand fill

Note: m bg – metres below grade

Referring to Figure 5a, borehole BH4/MW was located in the asphalt covered laneway towards the

southeast corner of the heritage farmhouse. Borehole BH5 was located in a grass covered portion of the

Site near the laneway and the south property boundary.

Referring to Figure 5b, borehole BH3 was located in a shrub covered area of the northeast portion of the

Site approximately 10 m from the Swan Lake shoreline where fill material may have been deposited from

infilling of the lake shoreline.

Referring to Figure 5c, Monitoring well EXT/MW3 was located in a shrub covered area of the northeast

portion of the Site approximately 10 m from the Swan Lake shoreline where fill material may have been

deposited from infilling of the lake shoreline.

6.2 COCs Found at Specific Locations

The COCs found in Site soil were barium, chromium V1, methylene chloride and PAHs (seven parameters)

Barium was detected at a concentration in excess of the Table 8 SCS in the top soil/silty sand fill sampled

from 0 to 1.6 m bg at monitoring well BH/MW4 in the southeast Site quadrant (refer to Figure 5a).



Date: June 30, 2015

24

Chromium was detected at a concentration in excess of the Table 8 SCS in the silt clay fill sampled from

0 to 1.6 m bg at borehole BH5 in the southeast Site quadrant (refer to Figure 5a). Chromium VI was also

detected at concentration in excess of the Table 8 SCS in the top soil/silty sand fill material sampled from

0 to 1.6 m bg at borehole/monitoring BH4/MW4in the southeast Site quadrant (refer to Figure 5a).

Methylene chloride was detected at a concentration in excess of the Table 8 SCS in the topsoil/silty sand

fill sampled from 0 to 1.6 m bg in at borehole BH3 in the northeast Site quadrant (refer to Figure 5b) .

Seven PAH parameters including benzo(a)anthracene, benzo(b)fluoranthene, benzo(a)pyrene,

dibenz(a,h)anthracene, fluoranthene, indeno(1,2,3-cd)pyrene and pyrene were detected at concentrations

in excess of the Table 8 SCS in the silty sand fill sample from 3.0 to 3.6 m bg at monitoring well location

EXT/MW6 in the northeast Site quadrant (refer to Figure 5c) .

6.3 Media Where COCs Were Found

At the four borehole locations where COCs were found, the media was soil. At borehole BH5, chromium

VI was detected in soil consisting of silt clay fill from 0 to 1.6 m bg. Barium and chromium VI were detected

in soil consisting of top soil and underlying silty sand fill at borehole/monitoring BH4/MW from 0 to 1.6 m

bg. Methylene chloride was detected in soil consisting of top soil and underlying silty sand fill at

borehole/monitoring well BH4/MW from 0 to 1.6 m bg. Benzo(a)anthracene, benzo(b)fluoranthene,

benzo(a)pyrene, dibenz(a,h)anthracene, fluoranthene, indeno(1,2,3-cd)pyrene and pyrene were detected

in soil consisting of silty sand fill at monitoring well EXT/MW6 from 3.0 to 3.6 m bg

6.4 Description of Locations Where COCs were found

Borehole BH5 (chromium VI) was located in a grass covered portion of the Site near the laneway and the

south property boundary.

Monitoring BH4/MW (barium and chromium VI) was located in the asphalt covered laneway towards the

southeast corner of the heritage farmhouse

Borehole BH3 (methylene chloride) was located in a shrub covered area of the northeast portion of the Site

approximately 10 m from the Swan Lake shoreline where fill material may have been deposited from infilling

of the lake shoreline.

Monitoring well EXT/MW3 (Benzo(a)anthracene, benzo(b)fluoranthene, benzo(a)pyrene,

dibenz(a,h)anthracene, fluoranthene, indeno(1,2,3-cd)pyrene and pyrene) was located in a shrub covered

area of the northeast portion of the Site approximately 10 m from the Swan Lake shoreline where fill material

may have been deposited from infilling of the lake shoreline.

Site plans showing the locations of these borehole/ monitoring well locations are provided in Figures 5a

though to 5c.



Date: June 30, 2015

25

6.5 Distribution of Former Soil COCs

The extent of the presence of the parameters detected in soil at concentrations in excess of the MOECC

Table 8 SCS was evaluated in the delineation sampling programs conducted by Soil Eng. in 2013 and exp

in 2014. The potential presence of chromium VI in the vicinity of BH5 (test pits TP01 through to TP04,

Figure 5a and Table 13), and, barium and chromium VI in the vicinity of BH/MW4 (test pits TP05 through

to TP08, Figure 5a and Table 13) was assessed in exp’s November 2014 test pit program. The potential

present of PAHs in the vicinity of EXT/MW6 (BH212/MW through to BH214, Figure 5c and Table 15) was

assessed in exp’s March 2014 investigative program and methylene chloride in the vicinity of BH3 (SA1

through to SA5, Figure 5b and Table 14) in the Soil Eng. June 2013 test program. The delineation

borehole/test pit sampling locations are also identified in the Site investigative location plan provided in

Figure 2. The stratigraphy of the delineation sampling locations is summarized in Table 2 and shown in

cross-sections DD’ through to GG’ of Figure 7d. The delineation soil sampling results for the assessment

of barium, chromium VI and methylene chloride are summarized in Table 13, methylene chloride in Table

14 and PAHs in Table 15. Please refer to the cross-section location plan presented in Figure 6 and cross-

sections DD’ through to FF’ of Figure 7d for sections depicting the locations and sampling intervals where

COCs were found in soil.

As summarized in Tables 13 to 15, none of the target parameters assessed in the delineation programs

were detected at concentrations in excess of the MOECC Table 8 SCS. Based on the results of the

delineation sampling programs, the extent of the parameters detected at concentrations in excess of the

Table 8 SCS was limited to the immediate vicinity of boreholes/monitoring wells BH3, BH4/MW, BH5 and

EXTMW6. The shaded areas of Figures 5a through to 5c show the inferred lateral extent of the parameters

with concentrations in excess the Table 8 SCS based on delineation borehole and test pit sampling

programs. Sampling locations where parameters were detected at concentrations in excess of the Table 8

SCS and identified as COCs are highlighted in red. Sampling locations where parameters identified as

COCs were not detected at concentrations in excess of the Table 8 SCS are highlighted in green.

Cross sections DD’ through to GG’ of Figure 7d show, highlighted in red, the sampling intervals at the

borehole/monitoring locations, where parameters were detected in soil at concentrations in excess of the

Table 8 SCS. Also shown in cross-sections DD’ through to GG’ is the inferred vertical extent of the presence

of the COCs identified in soil. Sampling intervals where the parameters identified as COCs in soil were not

detected at concentrations in excess of the Table 8 SCS are highlighted in green.

Soil from the areas where COCs were found was removed and disposed off-Site during the February 3,

2015 remedial excavation program. Please refer to Section 7 below for details on the February 3, 2015

remedial excavation program.



Date: June 30, 2015

26

6.6 Source of Former COCs

The delineation soil sampling indicated that the presence of the parameters detected at concentrations in

excess of Table 8 SCS were isolated occurrences The presence of barium and chromium VI at BH4/MW

was possibly associated with fill material deposited beneath the asphalt pavement surface. The detection

of chromium VI at BH5 in the southern of the Site was possibly associated with the presence of fill material,

however, there was no evidence of fill material having been deposited in this area. In the case of both

barium and chromium VI, it is possible that the presence of these parameters in the soil at concentrations

in excess of the MOECC Table 8 SCS were natural occurrences.

The detection of methylene chloride at borehole BH3 in the northeast portion of the Site was possibly

associated with the deposition of fill material. Borehole BH3 was located in area, where the shoreline of

Swan Lake was reportedly infilled. Non-detectable results, however, were reported for methylene chloride

in the soil and groundwater sampled at other Site locations. The detection of methylene chloride in a single

soil sample, therefore, does not appear to be associated with an on-Site release as there is no evidence of

this chemical having been used or handled at the Site. As evidenced by the non-detectable results reported

for the groundwater sampled at the Site, it is also not apparent that the detection of methylene chloride in

soil was associated with off-Site migration. Methylene chloride is a laboratory solvent and its detection may

be possibly attributable to laboratory bias.

In the case of the PAHs, which were detected at monitoring well EXT/MW6 in the vicinity of Swan Lake,

where infilling reportedly occurred along the perimeter of the lake, it is possible that the detected parameters

were associated with the deposition of fill material.

6.7 Potential for Contaminant Migration

As demonstrated by delineation soil sampling and illustrated in Figures 5a through to 5c and cross-sections

DD’ through to GG’ of Figure 7d, the vertical and lateral extent of the parameters detected in soil is very

limited. In all cases, the parameters were detected at depth intervals above the seasonal high groundwater

table and at concentrations marginally higher than the Table 8 SCS. As evidenced by the detection of

these parameters at very low concentrations above background levels, the mass of each contaminant is

very limited and the potential for these parameters to have come into contact with and leach into

groundwater is considered to be very limited. Assessment of the Site did not indicated that these

parameters have not migrated from the source sample intervals or the existence of preferential flow paths

for contaminant transport away from these areas.

6.8 Climatic and Meteorological Influences

Assessment of the sample intervals, where the soil COCs were found indicated, in all cases, they were in

the vadose zone soils and above seasonally high groundwater table fluctuations (refer to cross-sections

DD’ through to GG’ of Figure 7d). Given the very low concentrations reported for these parameters, there



Date: June 30, 2015

27

was very limited potential for leaching from soil into infiltrating water and migration towards the groundwater

table. Thus, given the isolated occurrences, the very low concentrations above background levels and the

depth intervals, meteorological and climatic conditions are not anticipated to have affected the movement

and distribution of these parameters to any measurable degree.

6.9 Potential For Vapour Intrusion

With respect to soil vapour intrusion, methylene chloride is a volatile organic compound and some of the

PAH COCs are considered sufficiently volatile for this contaminant transport pathway. The respective

locations where methylene chloride and PAHs were detected were situated in excess of 100 m of the vacant

farm house. Given the very limited presence of these COCs and the distance from the farm house, the

potential for these parameters to have been transported across the soil unsaturated zone at concentrations

that pose risks above acceptable levels for indoor air inhalation is negligible.

7 Post-Remediation Site Conditions

This section describes the remedial excavation program completed at the Site by exp on February 3, 2015

and current Site conditions. The remedial program consisted of the excavation and off-Site disposal of soil

material in the vicinity of Soil Eng. boreholes/monitoring wells BH3, BH4/MW, BH5 and EXT/MW6 where

COCs (i.e., barium, chromium VI, methylene chloride and PAHs) were found to be present in soil. Remedial

excavation location details are summarized as follows:

Table 8-1; Remedial Excavation Locations

Excavation Site Area

Borehole/Monitoring

Well Location Parameters

EXC-A Southeast Quadrant BH5 Chromium V1

EXC-B Northeast Quadrant EXT/MW6 PAHs

EXC-C Northeast Quadrant BH3 Methylene Chloride

EXC-D Southeast Quadrant BH/MW4 Barium

The remedial excavation locations are identified in the remedial excavation plan provided in Figure 9.

Details on the excavation dimensions are provided in Table 16.

The soil material was excavated by means of a tracked excavator operated by Gentile Contracting of

Toronto, Ontario. The excavated soil material was transported by tandem dump truck to O/A LASCAPE

Transfer and Recovery (MOE 7442-6YTJTD), 156 Disco Road, Toronto, Ontario. A total of 119.59 tonnes

of soil were removed from the Site.



Date: June 30, 2015

28

Confirmatory samples were collected from the floors and sidewalls of each excavation in accordance with

O.Reg. 153/04 (as amended) confirmatory sampling requirements. The confirmatory sample results are

summarized in Table 17. The remedial excavation sampling locations are identified in the confirmatory

sample location plan provided as Figure 10. For remedial excavations EXC-A (chromium VI), EXC-C

(methylene chloride) and EXC-D (barium and chromium VI), the target parameters were not detected at

concentrations in excess of laboratory RDLs and the MOECC Table 8 SCS. For excavation EXC-B, the

assessed PAH parameters were detected at concentrations less than the MOECC Table 8 SCS or were

not detected at concentrations in excess of laboratory RDLs and the MOECC Table 8 SCS.

As summarized in Table 17, none of the target parameters assessed in the confirmatory soil samples

collected during the February 3, 2015 remedial excavation program were detected at concentrations in

excess of the MOECC Table 8 SCS. Based on the results of the confirmatory sampling program, and the

earlier investigative programs conducted in 2007, and 2012 to 2014, COCs are not present in Site soils at

concentrations in excess of the MOECC Table 8 SCS.

8 Underground Utility Services

Utility services consisting of water, sewer and natural gas lines are located to the south of the Site along

16th Avenue. Based on the water level measurements recorded at the Site monitoring wells, these services

are located downgradient of the Site with respect to the inferred direction of groundwater flow in the water

table unit to the southwest. Based on water levels recorded at the monitoring wells located along the

downgradient property boundary, which range from 0.14 to 0.85 m bg at BH201/MW in the southwest corner

to 2.3 m bg at BH203/MW in the southeast corner, portions of these utilities may lie below the groundwater

table. Thus preferential pathways may exist along these utilities for any potential contaminants transported

across the downgradient property boundary.

9 Receptors and Exposure Pathways

This Phase Two CSM included the development of human health and ecological conceptual Site models

(HHCSM and ECSM) from the assessment of the Site geologic and hydrogeoglogic conditions, COCs and

the proposed residential land use scenario. The HHCSM and the ECSM identify relevant receptors and

the pathways by which these receptors may be exposed to potential COCs in Site environmental media.

As COCs were detected in Site soil and remedial excavations were completed at the Site (see Sections 6

to 7), HHCSMs and ECSMs were developed for both the pre and post remediation Site conditions.

Graphical depictions of the pre and post remediation HHCSMs are presented in Figures 11a and 11b.

Graphical depictions of the pre and post remediation ECSMs are presented in Figures 12a and 12b,

respectively.



Date: June 30, 2015

29

9.1 Contaminants of Concern

The COCs identified in Site soils consisted of metals including barium and chromium VI, VOCs including

methylene chloride, and PAHs including benzo(a)anthracene, benzo(b)fluorathene, benzo(a)pyrene,

dibenzo(a,h)anthracene, fluoranthene, indeno(1,2,3-cd)pyrene and pyrene. These parameters differ in

their properties (i.e. water solubility, volatility, organic carbon partition coefficients, etc.) and therefore in the

extent to which they will partition into and be transported in Site environmental media.

Chemicals found in soils will be distributed to varying degrees amongst the soil solid, dissolved and gas

phases. The COCs found in the Site soils consist of both chemical compounds (i.e. methylene chloride

and PAHs) and metallic elements (barium and chromium VI). The degree of solid phase and dissolved

phase partitioning for methylene chloride and PAHs is dependent on size, chemical structure, polar/non

polar characteristics and ionic characteristics. The chemical behavior of barium and chromium is

dependent on their speciation and the characteristics of the soil mineral particles and the soil solution.

Methylene chloride is a single carbon compound with some polar character and thus will be distributed

between soil organic matter and soil pore water. It is also characterized by a moderate to high pure

component saturated vapour pressure and Henry’s Law constant (i.e. air water partition coefficient), and,

thus, it will readily partition into soil gas.

The PAHs found at the Site are – multi - aromatic ring – higher molecular weight - hydrocarbon compounds.

As such, they have less polar character and as a somewhat strong hydrophobic compounds will be

associated with soil organic matter. They have low saturated vapour pressures and Henry’s Law constants

and, thus, will partition into soil gas to a limited extent.

Metals are found in their ionic forms in soil and, thus, will partition between soil mineral particles and pore

water. Metals will be bound to the charged surfaces of soil mineral particles by electrostatic or ionic

interactions. They also may be removed from solution by electrostatic interactions with aluminium and iron

hydroxide/oxyhydroxide precipitates that may coat the surfaces of soil mineral particles. They also may

become bound by coordination/covalent interactions with electron donating functional groups of soil organic

material macromolecules and mineral precipitates. In pore water, metals may be found in solution as

hydrated ions or complex ions through ligand interactions. Metals also may be removed from solution as a

result of precipitation and co-precipitation interactions and complex ion interactions. As a group II element,

the behavior of barium in soil will be characterized by electrostatic interactions.

Both barium and chromium have almost negligible vapour pressures and thus will not partition into soil gas

to any measurable extent.

9.2 Human Receptors and Potential Exposure Pathways

This section identifies human and ecological receptors relevant to the Site conditions and proposed

development, and, the pathways by which these receptors may come into contact with potential COCs.

This section also identifies the potentially complete exposure pathways found at the Site following

completion of the remedial excavation works on February 3, 2015 (refer to Figures 11a and 11b).

Based on the proposed residential land use for the Site, relevant on-Site human receptors include:



Date: June 30, 2015

30

Property residents (toddlers and lifetime composite);

Repetitive Short-Term Maintenance Workers;

Construction Workers; and

Property visitors (toddlers and lifetime composite).

Toddler property residents and visitors represent the most sensitive of the receptor age groups assessed

by MOE (2011) for the evaluation of exposure to threshold acting or non carcinogenic COCs. Lifetime

composite residents and visitors are assessed to evaluate exposure to non-threshold acting or carcinogenic

COCs

Relevant exposure pathways by which these receptors may come into direct and indirect contact with

potential COCs are as follows:

Soil incidental ingestion and direct dermal contact (all receptors);

Soil particulate inhalation (construction workers);

Soil to outdoor air inhalation and vapour skin contact (all receptors);

Trench soil to outdoor air inhalation and vapour skin contact (construction workers);

Soil to indoor air inhalation and vapour skin contact (property residents and visitors);

Groundwater ingestion and dermal contact (all receptors);

Groundwater to outdoor air inhalation and vapour skin contact (all receptors); and

Groundwater to indoor air inhalation and vapour skin contact (property residents and visitors).

Relevant off-Site receptors include:

Property residents (toddlers and lifetime composite);

Repetitive Short-Term Maintenance Workers;

Construction Workers;

Property visitors (toddlers and lifetime composite); and

Indoor/long-term workers.

The relevant exposure pathways pertaining to the off-Site receptors are as follows:

Groundwater to outdoor air inhalation and vapour skin contact (all receptors);

Groundwater ingestion and dermal contact (all receptors); and

Groundwater to indoor air inhalation and vapour skin contact (property residents and visitors).

Based on the assessment of the Site conditions where concentrations of potential COCs meet the

applicable MOECC Table 8 SCS and as illustrated in Figure 10, all relevant exposure pathways are

incomplete.

Ecological Receptors and Potential Exposure Pathways



Date: June 30, 2015

31

Based on the proposed residential land use for the Site, relevant on-Site ecological receptors

encompassing different trophic levels include:

Terrestrial vegetation and soil invertebrates (first tier receptors);

Herbivorous birds and mammals (second tier receptors);

Insectivorous birds and mammals (second tier receptors);

Omnivorous birds and mammals (second tier receptors);

Carnivorous birds and mammals (second tier receptors).

Aquatic vegetation (first tier receptor); and

Aquatic animals (first and second tier receptor)

Relevant first tier exposure pathways by which ecological receptors may come into direct and indirect

contact with potential COCs are as follows:

Soil to ambient air stem and foliar uptake (terrestrial vegetation);

Soil direct dermal contact and root uptake (terrestrial vegetation);

Soil particulate inhalation and vapour inhalation (soil invertebrates);

Soil incidental ingestion and dermal contact (soil invertebrates);

Groundwater to ambient air stem and foliar uptake (terrestrial vegetation);

Groundwater direct dermal contact and root uptake (terrestrial vegetation); and

Groundwater vapour inhalation (soil invertebrates)

Relevant second tier exposure pathways by which ecological receptors may come into direct and indirect

contact with potential COCs are as follows:

Vegetation ingestion (birds and mammals – herbivores and omnivores);

Soil invertebrate ingestion (birds and mammals – insectivores, omnivores and carnivores);

Soil direct contact and incidental ingestion (birds and mammals – all receptors);

Soil particulate and soil to ambient air vapour inhalation (birds and mammals – all receptors); and

Groundwater to ambient air vapour inhalation (birds and mammals – all receptors).

Relevant off-Site ecological receptors include:

Terrestrial vegetation and soil invertebrates (first tier receptors);

Herbivorous birds and mammals (second tier receptors);

Insectivorous birds and mammals (second tier receptors);

Omnivorous birds and mammals (second tier receptors);

Carnivorous birds and mammals (second tier receptors);

The relevant exposure pathways pertaining to the off-Site ecological receptors are as follows:



Date: June 30, 2015

32

Surface water dermal contact and ingestion (aquatic animals)

Root stem and foliar uptake (aquatic vegetation);

Vegetation ingestion (aquatic animals)

9.3 Pre-remediation HHCSM and ECSM

Figures 11a and 12a present graphical depictions of the pre-remediation Site HHCSM and ECSM,

respectively.

Based on the pre-remediation Site conditions and the characteristics of the identified COCs, potentially

complete pre-remediation human health exposure pathways were as follows:

Soil direct dermal contact, incidental ingestion and particulate inhalation;

Soil gas partitioning, and, outdoor air inhalation and vapour dermal contact (methylene chloride

and volatile PAHs); and

Soil gas partitioning, indoor air vapour intrusion, and, indoor air inhalation and vapour dermal

contact (methylene chloride and volatile PAHs)

Based on the pre-remediation Site conditions and the characteristics of the identified COCs, potentially

complete pre-remediation ecological exposure pathways were as follows:

Terrestrial vegetation root uptake;

Terrestrial vegetation stem and foliar uptake (methylene chloride and volatile PAHs);

Soil invertebrate direct contact and vapour inhalation

Vegetation ingestion by herbivorous bird and mammals (second tier receptors);

Soil invertebrate ingestion by insectivorous bird and mammals (second tier receptors);

Soil invertebrate ingestion by carnivorous bird and mammals (second tier receptors);

Vegetation and soil invertebrate ingestion by omnivorous birds and mammals (second tier

receptors);

Direct dermal contact and incidental soil ingestion by birds and mammals.

9.4 Post Remediation HHCSM and ECSM

Figures 11b and 12b present graphical depictions of the pre-remediation Site HHCSM and ECSM, respectively.

Figures

Reference: Natural Resources Canada Map 040P10

Site Location Plan and Regional Topographic Map

Phase Two Environmental Site Assessment6330 16th Avenue, Markham, Ontario

Project No. KCH-00216597-C0

Figure 1

SITE

N

O

R

T

H

Environmental Division405 Maple Grove Road, Unit 6Cambridge, Ontario N3E 1B6

Tel: 519.650.4918Fax: 519.650.4603

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:

DRAWING TITLE: JOB #:

SITE INVESTIGATIVE LOCATION PLAN

6330 16th AVENUE, MARKHAM, ONTARIO

FEBRUARY 2015

t: 1.519.650.4918

405 Maple Grove Road, Unit 6

Cambridge, ON N3E 1B6

Canada

exp Services Inc.

KCH-00216597-C0

SS/LAB

BH

2

AS NOTED

N

O

R

T

H

RESIDENTIAL

RESIDENTIAL

RESIDENTIAL

VACANT

PHASE ONE/ PHASE TWO/ RSC

PROPERTY BOUNDARY

PHASE ONE/ PHASE TWO/ RSC PROPERTY BOUNDARY

LEGEND:

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


SITE SURVEY PLAN AND BOUNDARIES


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

SS/LAB

BH

3

AS NOTED

NOTES:

(1) SOIL, GROUNDWATER AND SEDIMENT STANDARDS FOR USE UNDER PART XV.1 OF THE ENVIRONMENTAL PROTECTION ACT, ONTARIO MINISTRY

OF THE ENVIRONMENT AND CLIMATE CHANGE (MOECC, FORMERLY MINISTRY OF THE ENVIRONMENT) APRIL 2011.

(2) TABLE 8 GENERIC SITE CONDITION STANDARDS (SCS) FOR USE WITHN 30 METRES OF A WATER BODY IN A POTABLE GROUNDWATER

CONDITION.

(3) BOLDED VALUES EXCEED THE APPLICABLE ONTARIO MINISTRY OF THE ENVIRONMENT AND CLIMATE CHANGE (MOECC) TABLE 8 SCS.

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


PRE-REMEDIATION METAL SOIL RESULTS

EXCEEDING MOECC TABLE 8 SCS


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

SS/LAB

BH

5a

AS NOTED

N

O

R

T

H

Parameter

Sample

Interval

(m bg)

CONC.

(ug/g)

Barium 0 - 1.6 250

Chromium VI 0 - 1.6 2.44

Parameter

Sample

Interval

(m bg)

CONC.

(ug/g)

Chromium VI 0 - 1.6 1.13

METALS

CONC.

(ug/g)

Barium 220

Chromium VI 0.66

MOECC TABLE 8 SCS SOIL

(1) (2)

NOTES:

(1) SOIL, GROUNDWATER AND SEDIMENT STANDARDS FOR USE UNDER PART XV.1 OF THE ENVIRONMENTAL PROTECTION ACT, ONTARIO MINISTRY

OF THE ENVIRONMENT AND CLIMATE CHANGE (MOECC, FORMERLY MINISTRY OF THE ENVIRONMENT) APRIL 2011.

(2) TABLE 8 GENERIC SITE CONDITION STANDARDS (SCS) FOR USE WITHN 30 METRES OF A WATER BODY IN A POTABLE GROUNDWATER

CONDITION.

(3) BOLDED VALUES EXCEED THE APPLICABLE ONTARIO MINISTRY OF THE ENVIRONMENT AND CLIMATE CHANGE (MOECC) TABLE 8 SCS.

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


PRE-REMEDIATION VOC SOIL RESULTS

EXCEEDING MOECC TABLE 8 SCS


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

SS/LAB

BH

5b

AS NOTED

N

O

R

T

H

Parameter

Sample

Interval

(m bg)

CONC.

(ug/g)

Methylene Chloride

0 - 1.6 3.43

(3)

VOCs

CONC.

(ug/g)

Methylene Chloride

0.05

MOECC TABLE 8 SCS SOIL

(1) (2)

A

A'

D'

D

E'

E

F'

F

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


CROSS SECTION LOCATION PLAN


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

SS/LAB

BH

6

AS NOTED

N

O

R

T

H

BH209/MW

O/S 10.6m

EL. 102.45

BH210/MW

O/S 8.2m

EL. 104.39

105.00

95.00

100.00

E

LE

VA

TIO

N

(1) (2)

(m

)

BH211/MW

O/S 6.6m

EL. 104.07

90.00

TOPSOIL

GRAVELY SAND

SILTY SAND FILL

SANDY SILT TILL

CLAYEY SILT TILL

SAND

LEGEND:

NOTES:

(1) ELEVATIONS ARE BASED ON AN ARBITRARY BENCHMARK (TOP NUT OF WILLIAMSON STREET FIRE HYDRANT)

WITH AN ASSUMED ELEVATION OF 100.00m

(2) VERTICAL SCALE = 10 x HORIZONTAL SCALE

BOREHOLE

SCREENED INTERVAL

GROUNDWATER ELEVATION - MARCH 2014

O/S OFFSET

m METERS

GROUNDWATER FLOW DIRECTION

(OUT OF THE PLANE OF THE PAGE)

GROUNDWATER ELEVATION - JUNE 2014

GROUNDWATER ELEVATION - NOVEMBER 2014

101.04

100.65

100.44

101.20

101.26

100.02

101.13

101.07

100.93

100.81

100.57

BH212/MW

O/S 9.3m

EL. 104.36

EL. GROUND SURFACE ELEVATION (m)

A

A'

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


CROSS SECTION A-A'


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

SS/LAB

BH

7a

AS NOTED

105.00

95.00

100.00

E

LE

VA

TIO

N

(1) (2)

(m

)

90.00

NOTES:




CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


CROSS SECTION B-B'


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

SS/LAB

BH

7b

AS NOTED

BH201/MW

EL. 97.09

105.00

95.00

100.00

E

LE

VA

TIO

N

(1) (2)

(m

)

90.00

C

C'

96.9

96.34

96.25

GROUNDWATER FLOW DIRECTION

NOTES:




CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


CROSS SECTION C-C'


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

SS/LAB

BH

7c

AS NOTED

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


GROUNDWATER ELEVATION PLAN

MARCH 24, 2014


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

SS

BH

8a

AS NOTED

N

O

R

T

H

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:



JUNE 4, 2014


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

SS

BH

8b

AS NOTED

N

O

R

T

H

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:



OCTOBER 6, 2014


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

SS

BH

8c

AS NOTED

N

O

R

T

H

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


REMEDIAL EXCAVATION LOCATION PLAN


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

DV

BH

9

AS NOTED

N

O

R

T

H

BASE

X X

B1 B2

WEST WALL

X

W1

SOUTH WALL

X

S1

BASE

X X

B1 B2

NORTH WALL

X

N1

SOUTH WALL

X

S1

BASE

X

X

B1

B2

EAST WALL

X

E1

WEST WALL

X

W1

BASE

X

X

B1

B2

NORTH WALL

X

N1

EAST WALL

X

E1

EXC-A

EXC-B

EXC-C

EXC-D

X

B1

EXC-A

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


REMEDIAL EXCAVATION CONFIRMATORY

SAMPLE LOCATION PLAN


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

LAB

BH

10

AS NOTED

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


PRE REMEDIATION

HUMAN HEALTH CONCEPTUAL SITE

MODEL


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

LAB

BH

11a

AS NOTED

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


POST REMEDIATION

HUMAN HEALTH CONCEPTUAL SITE

MODEL


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

LAB

BH

11b

AS NOTED

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


PRE REMEDIATION

ECOLOGICAL CONCEPTUAL SITE MODEL


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

LAB

BH

12a

AS NOTED

CHKD.:

FIG. No.:

DWN.:

DATE:

SCALE:


POST REMEDIATION

ECOLOGICAL CONCEPTUAL SITE MODEL


FEBRUARY 2015

t: 1.519.650.4918



Canada

exp Services Inc.

KCH-00216597-C0

LAB

BH

12b

AS NOTED

Tables

Table 1: SITE ENVIRONMENTAL SETTING DATA


NATIVE SOIL

Type: Sandy silt, gravelly sand, sand, sandy silt till

Hydraulic Conductivity (select range)

> 10-3

cm/s: 4.09 x 10-3

c,/s (geometric mean of two falling head and rising head SWRTs

<10-3

to >10-6

cm/s:

< 10-6

cm/s:

Soil Particles < 75 Microns: More than 50% as determined from grain size analysis of three samples

GROUND WATER

Depth to Water Table: 0.14 to 3.65 m below grade

Estimated or Measured: Measured by exp in March, June and October, 2014

Direction of Flow: Southwest

Estimated or Detemined: Determined from water level measuremens and elevation survey

MUNICIPAL SERVICES

Piped Water: Yes

Groundwater Source: No

Distance to Well: NA

Surface Water Source: No

Sanitary Sewer: Yes

Storm Sewer: Yes

Distance to Nearest Well: NA

Approximate Depth of Well: NA

Private Sanitary Sewage: No

SURFACE WATER

Name of water body: Swan Lake

Distance from site: 0.3 hectare portion of Site extends on to lakw

Elevation drop from site: Approximately 2 to 3 m below grade

Direct Drainage from site: Yes

PRIVATE SERVICES

1 of 1

Surface Depth Interval

Elevation (m) (m bg)

0.0 - 0.40 Topsoil

09,10-Oct-07 EXT/BH1 NA 0.40 - 6.2 Silty Fine Sand

4.4 - 15.4 Silt Clay Till

0.0 - 0.40 Topsoil

10-Oct-07 EXT/BH2 NA 0.40 - 2.2 Silty Sand Till

2.2 - 15.4 Silty Clay Till

0.0 - 0.30 Topsoil

11,12-Oct-07 EXT/BH3 NA 0.30 - 5.5 Silty Sand Till


0.0 - 2.9 Sandy Silt


0.0 - 0.36 Topsoil

11-Oct-07 EXTBH5 NA 0.36 - 7.8 Silty Sand Till

7.8 -15.4 Silty Clay Till

0.0 - 0.40 Topsoil

0.4 - 3.8 Silty Sand Fill

9-Oct-07 EXTMW6 NA 3.8 - 4.4 Sand (Alluvial Deposit)

4.4 - 7.5 Gravell Sand


0.0 - 0.40 Topsoil

9-Oct-07 EXTMW7 NA 0.40 - 7.7 Fine to coarse sand


0.0 - 0.36 Topsoil


9-Oct-07 EXTMW8 1.4 - 4.6 Fine to coarse sand

4.6 - 7.7 Sandy Silt


0.0 - 0.30 Topsoil

15-Oct-07 EXTBH9 NA 0.30 - 7.7 Silty Sand Till

7.7-10.4 Silty Clay Till

0.0 - 0.15 Topsoil

14-Dec-12 BH/MW1 - 0.15 - 4.6 Silty Sand Fill

4.6 - 6.1 Silty Clay

0.0 - 0.46 Topsoil

0.46 - 3,0 Silty Sand Fill

3.0 - 4.6 Silty Sand


0.0 - 0.15 Topsoil


0.0 - 0.51 Asphalt

BH/MW4 101.77 0.15 - 4.0 Silty Sand Fill


0.0 - 0.15 Topsoil

14-Dec-12 BH5 NA 0.15 - 1.5 Silty Clay Fill


0-0.29 Topsoil

0.29- 3.09 Silty Sand

3.09 - 4.59 Sandy Silt Till

0.0 -.0.94 Topsoil

0.94 --1.54 Silty Sand

1.54 - 2.44 Sand



19-Mar-14 BH201/MW 97.09

18-Mar-14 BH202/MW 100.24

12,15-Oct-07 EXTBH4 NA

14-Dec-12 BH/MW2 104.09

14-Dec-12

NA

14-Dec-12 BH3 NA

Strata DescriptionBorehole Date



1 of 3


Elevation (m) (m bg)Strata DescriptionBorehole Date



0.0 - 0.98 Topsoil

0.98 - 4.88 Sand


0.0 - 0.40 Topsoil

0.40 - 3.4 Silty sand


0.0 - 0.09 Asphalt

0.09 - 0.39 Topsoil



0.0 - 1.03 Topsoil


0.0 - 0.25 Topsoil


4.15 - 4.45 Sand


0.0 - 0.27 Topsoil

0.27 - 3.97 Sand

0.0 - 0.45 Topsoil


1.95 - 2.15 Gravelly Sand

2.15 -2.75 Sandy Silt Till

0.0 - 0.99 Topsoil




0.0 - 0.40 Topsoil



0.0 - 0.76 Topsoil


2.26 - 6.96 Gravelly Sand


11.46 - 14.26 Clayey Silt Till

0.0 - 0.28 Topsoil

0.28 - 0.78 Sand and Gravel Fill


2.58 - 3.78 Sand

0.0 - 0.94 Topsoil



3.06 - 3.76 Sand

0.0 - 0.64 Topsoil



0.0 - 0.78 Topsoil



0.0 - 0.61 Topsoil



1.81 - 2.31 Sand

20-Mar-14 SGP3 104.11

20-Mar-14 SGP1 103.64

20-Mar-14 SGP2 104.58

20-Mar-14 BH213/MW 104.48

20-Mar-14 BH214/MW 104.36

18-Mar-14 BH211/MW 104.07

19-Mar-14 BH212/MW 104.36

18-Mar-14 BH209/MW 102.45

18-Mar-14 BH210/MW 104.39

18-Mar-14 BH207/MW 101.65

20-Mar-14 BH208/MW 103.67

20-Mar-14 BH205 102.79

18-Mar-14 BH206/MW 100.03

18-Mar-14 BH203/MW 101.28

20-Mar-14 BH204/MW 102.40

2 of 3


Elevation (m) (m bg)Strata DescriptionBorehole Date



0.0 -0.65 Topsoil


0.0 - 0.65 Topsoil


0.0 - 0.6 Topsoil


0.0 - 0.5 Topsoil


0.0 - 0.45 Topsoil


0.0 - 0.45 Topsoil


0.0 - 0.65 Topsoil


0.0 0.5 Topsoil


0.0 -0.65 Topsoil


30-Oct-13 SA1 NA 0.7 Silty sand





16-Sep-13 TP1 NA 0. 2 - 0.5 Top soil

16-Sep-13 TP2 NA 0. 2 - 0.5 Top soil

16-Sep-13 TP3 NA 0. 2 - 0.5 Top soil

16-Sep-13 TP4 NA 0. 2 - 0.5 Top soil

Notes:

m bg - metres below grade

NA- Not available/not surveyed

28-Nov-14 TP01 NA

28-Nov-14 TP02 NA

28-Nov-14 TP03

28-Nov-14 TP04

NA

NA

28-Nov-14 TP05 NA

28-Nov-14 TP06 NA

28-Nov-14 TP01 NA

28-Nov-14 TP07 NA

28-Nov-14 TP08 NA

3 of 3

24-Mar-14 4-Jun-14 6-Oct-14 24-Mar-14 4-Jun-14 6-Oct-14

Silty sand fill/gravelly sand/

sandy siilt till

Silty sand fill/silty sand/

Sandy silt till

Notes:

mbg - metres below grade

NI - monitor was not installed

Table 3: Monitoring Well Completion Details


Depth to Groundwater (m bg)

NM

NM ND1.5 - 6

ND

EXT/MW7 ND

MonitorScreen Interval

(mbg)

Stratigraphic Units

Intercepted

EXT/MW6 ND9.1 - 15.2 NM NM

NM

Silty clay till

98.91

2.96

2.89

3.14

2.86

3.01

2.34

1.5 - 4.5

3.0 -6.0

2.88 3.04 101.45 101.3 101.14

EXT/MW8

Top soil/ fine to coarse sand NM

NM1.5 - 6

BH102 - 2.73

Fine to coarse sand NM NDNM

BH212/MW 9.1 - 12.1 Sandy silt till

BH210/MW

BH211/MW

1.8 - 4.8

2.8 - 5.8Silty sand fill/ sand

ND

NDBH/MW1 Silty sand fill/silty clay NM 3 - 6 ND

101.08

99.43

NM NM

BH/MW2

BH/MW4

Silt sand fill/silty sand

Silty sand fill/silty clay

100.95

BH207/MW 1.5 - 4.5Sandy silt till

BH206/MW 2.50 -4.0Sandy silt till

BH209/MW 1.3 - 2.8

BH208/MW 3.05 - 5.05Silty sand/gravelly sand

1.59

BH201/MW 1.5 - 4.5Silty sand/silty sand till

BH202/MW 1.5 - 4.5Silty sand/sandy silt till

BH204/MWSilty sand/sandy silt till

1.5 - 4.5

BH203/MW 2.05 - 5.05Silty sand/sand/sandy silt till 2.31

2.59

1.15

3.65

0.75

1.81

2

2.1

1.11

1.49

3.08

1.79

3.19

2.99

3.54

0.99

3.22

1.41

3.13

2.94

0.14

1.595

2.06

2.5

99.61

3.79

Groundwater Elevation (m)

ND

ND

ND

96.96 96.34 96.25

98.64 98.43 98.04

99.2299.28 98.978

99.89 100.29

2.04

3.365

2.01

3.37

3.14

0.84

2.2

100.71 100.82 100.57

101.13

ND

98.88

101.26 101.2 101.02

101.13 101.08 100.93

100.45 100.59 100.3

101.04 100.66 100.44

99.81

98.44 98.92 99.15

100.66 100.16

1 of 1

Sample

LocationSample Type Sample Date

Sample Depth

Interval

(mbg) Stratigraphic Unit APEC Evaluated/ Sample Rationale

BH4 Borehole 12.15-Oct-07 0.8 - 1.1 Sandy silt A2 - Off-Site waste disposal activities and fill material quality

2.3 - 2.8 Silty sand fill

3.0 -3.5 Silty sand fill

4.6 - 4.7 Fine to coarse sand

6.1 - 6.3 Fine to coarse sand

0.8 - 1.2 Silty clay till

4.6 - 4.9 Sany Silt


14-Dec-12 1.6 - 2.3 Silty sand fill

4.6 -6.1 Silty clay till




4.6 - 6.1 Silty clay



0.0 - 1.6 Silty clay fill Fill material quality

3.0 - 4.0 Silty sand fill A1 - Fuel Oil AST

0.0 - 1.6 Silty clay fill Fill material quality and road salt derived impacts

1.6 - 2.3 Silty clay Pesticide Use from historic agricultural activites

SA3 Surface 14-Jun-13 0.0 -0. ND Metals and Inorganics, VOCS & PAHsA2 - Off-Site Waste Disposal Activities and fill material quality

TP1Test pit 16-Sep-13 0. 2 - 0.5 Top soil

A2 - Off-Site Waste Disposal Activities and fill material quality









SA1 Test pit 30-Oct-13 0.7 Silty sand Delineation of methylene chloride presence in soil





Table 4: Soil Sample Summary




A2 - Off-Site waste disposal activities and fill material quality

A2 - Off-Site waste wisposal activities and fill material quality



Metals and Inorganics


VOCs and PAHs


VOCs and PAHs

BH/MW1Borehole/

monitoring well

BH/MW2PAHs

PHCs

VOCs

Borehole/

monitoring well

EXT/MW6Borehole/

monitoring well

EXT/MW7Borehole/

monitoring well

EXT/MW8Borehole/

monitoring well

14-Dec-12

VOCs


VOCs

PAHS

9-Oct-07

9-Oct-07

9-Oct-07

BH3 Borehole

BH/MW4Borehole/

monitoring well

BH5 BoreholeOCPs


VOCs & PHCs, PAHs?


Metals and Inorganics & PAHs

VOCs14-Dec-12

VOCs

VOCs






VOCs

VOCs

VOCs

Potential Contaminants of

Concern



14-Dec-12

14/12/2012

1 of 2

Table 4: Soil Sample Summary


Potential Contaminants of

Concern

BH201/MW Borehole 19-Mar-14 1.52 - 2.25 Silty sand

0.0 - 0.76 Topsoil Former Orchard, pesticide use

0.76 -1.52 Silty sand Surficial soil Quality

BH203/MW Borehole 18-Mar-14 1.52 - 2.25 Silty sand

0.76 -1.52 Silty sand fill Surficial soil quality

1.52 - 2.25 Silty sand A1 - Fuel Oil AST

0.76 -1.52 Silty sand fill Fill Quality

3.05 - 3.75 Silty sand A1 - Fuel Oil AST

BH206/MW Borehole 18-Mar-14 0.76 - 1.52 Top soil/silty sand fill

0.0 - 0.76 Topsoil Former Orchard, pesticide use and fill quality

0.76 -1.52 Silty sand Surficial soil Quality

BH208/MW Borehole 20-Mar-14 4.55 - 5.30 Gravelly sand Cross -gradient property boundary

0.0 - 0.76 Topsoil Pesticide Use from historic agricultural activites

2.15 - 2.75 Gravelly sand/sandy silt till


0.76 -1.52 Top soil/silty sand fill

3.05 - 3.75 Silty sand fill/silty sand

BH211/MWBorehole /Monitoring

Well 18-Mar-14 3.75 - 4.55 Silty sand fill/silty sand


3.05 - 3.60 Gravelly sand A2 - Off-Site Waste Disposal Activities, PAH presence

3.80 - 4.25 Gravelly sand



A2 - Off-Site Waste Disposal Activities and fill material quality,

3.05 - 3.75 Silty sand Delineation of PAH presence



3.05 - 3.75 Silty sand Delineation of PAH presence

TP-01 Test pit 28-Nov-14 1.6 Silty sand Delineation of chromium VI presence




TP-05 Test pit 28-Nov-14 1.6 Silty sand Delineation of barium and chromium VI presence





TP-09 Test pit 28-Nov-14 3.1 Silty sand Waste Classification Determination

Notes:

PAHs - polycyclic aromatic hydrocarbons

PHCs - petroleum hydrocarbons

TCLP - Toxic characteristic leachate proceduure

VOCs - volatile organic compounds

ND -No description provided.



Barium and Chromium VI




TCLP - metals, VOCs and PAHs

Chromium VI

Chromium VI

Chromium VI and TCLP metals

Chromium VI


VOCS

PAHs

BH202/MWBorehole/

monitoring well

BH204/MWBorehole/

monitoring well

BH205/MWBorehole/

monitoring well

BH207/MWBorehole/

monitoring well

BH209/MWBorehole/

monitoring well

BH210/MWBorehole/

monitoring well

BH212/MW

VOCs

Borehole/

monitoring well

BH213 Borehole

PHCs and BTEX

pH

18-Mar-14

20-Mar-14

20-Mar-14

18-Mar-14

PAHs

VOCs

PAHs

VOCs

PAHs


PHCs and BTEX

OCPs

VOCs


PHCs and BTEX


pH

pH

OCPs


OCPs, PCBs


18-Mar-14

18-Mar-14

19-Mar-14

20-Mar-14

BH214 Borehole 20-Mar-14

2 of 2

9-Oct-07 14-Dec-12 21-Jun-13 4-Mar-14 6-May-14 7-Oct-14 APEC Assessed/Rationale

Silty sand fill/gravelly sand/

sandy siilt till

Silty sand fill/silty sand/

Sandy silt till

Notes:

A2 - Off-Site Waste Disposal Activities

and fill material leaching

A1 - Fuel Oil AST

Downgradient Property Boundary



A1 - Fuel Oil AST

A1 - Fuel Oil AST





















Metals & Inorganics,

PHCs and VOCs

NS

NS

NS

NS


PHCs and VOCs

Top soil/ fine to coarse sand

EXT/MW8

MW1

MW2

MW4

EXT/MW69.1 - 15.2 Silty clay till

EXT/MW71.5 - 6


PAHs and VOCs


PHCs &VOCs

NI

NI

NI


PAHs and VOCs 3 - 6

1.5 - 6

1 - 4.5

3.0 - 6.0

Fine to coarse sand


VOCs and PAHs

Metals & Inorganics, and

VOCs


Silt sand fill/silty sand


NI NIVOCs VOCs VOCs

NI

NI

Sample Date

BH201/MW 1.5 - 4.5Silty sand/silty sand till NI NI NI

VOCs VOCs VOCs

BH202/MW 1.5 - 4.5Silty sand/sandy silt till NI


and VOCs


PAHs and VOCs


PAHs and VOCs

NIVOCs VOCs VOCs

BH204/MWSilty sand/sandy silt till

1.5 - 4.5NI NI NI

VOCs VOCs VOCs

BH203/MW 2.05 - 5.05Silty sand/sand/sandy silt till NI NI

VOCs VOCs VOCs

BH207/MW 1.5 - 4.5Sandy silt till NI NI NI

VOCs VOCs VOCs

BH206/MW 2.50 -4.0Sandy silt till NI NI

BH210/MW

BH211/MW

1.8 - 4.8

2.8 - 5.8Silty sand fill/ sand

VOCs VOCs VOCs

BH209/MW 1.3 - 2.8NI NI NI

VOCs VOCs VOCs

BH208/MW 3.05 - 5.05Silty sand/gravelly sand NI NI

VOCs

NI NI NIVOCs VOCs VOCs

NI NI NIVOCs VOCs

NIVOCs VOCs VOCsBH212/MW 9.1 - 12.1

Sandy silt till NI NI

Table 5: Groundwater Sampling Summary


VOCs VOCs VOCs

VOCs VOCs VOCs

NS NS NS

NS NS NS

NS NS NS

NS NS NS

MonitorSceen Interval

(mbg)

Stratigraphic Units

Intercepted


VOCs and PAHs

1 of 1

Table 6: Maximum Soil Concentration Data - Metals and Inorganics


Contaminant Name

Number of

Sample

Locations

Number of

Samples

Analysed

Maximum

Reporting

Detection

Limit(1)

Maximum

Concentration(1)

MOE (2011) Table 8

SCS(2,3) Units Date Sampled

Borehole/Test

Pit Sample I.D. Sample Depth (m bg)

Antimony (Sb) 16 16 1.0 ND 1.3 µg/g 16-Sept-13, Multiple Multiple 0.76 - 1.52, 1.52 - 2.25

Arsenic (As) 16 16 1.0 2.2 18 µg/g 20-Mar-14 BH204/MW BH204/MW-S2 0.76- 1.52

Barium (Ba) 18 18 1.0 105 220 µg/g 9-Oct-07 EXT/MW8 8/2 0.8 -1.2

Beryllium (Be) 16 16 0.5 0.6 2.5 µg/g 9-Oct-07 EXT/MW8 8/2 0.8 -1.2

Boron (B) 16 16 5.0 8.2 36 µg/g 16-Sep-13 TP3 TP3 0.2 - 0.5

Boron (HWE) 11 11 0.33 1.5 µg/g 16-Sep-13 TP3 TP3 0.2 - 0.5

Cadmium (Cd) 16 16 0.5 0.12 1.2 µg/g 18-Mar-14 BH204/MW BH204/MW-S2 0.76- 1.52

Chromium (Cr) 16 16 1.0 23 70 µg/g 13-Jun-13 SA3 SA3 0.0 - 0.5

Chromium VI 13 14 0.4 ND 0.66 µg/g 9-Oct-07 Multiple Multiple Multiple

Cobalt (Co) 16 16 1.0 5.9 22 µg/g 20-Mar-14 BH204/MW BH204/MW-S2 0.76- 1.52

Copper (Cu) 11 11 1.0 13 92 µg/g 20-Mar-14 BH204/MW BH204/MW-S2 0.76- 1.52

Lead (Pb) 13 15 1.0 20.5 120 µg/g 16-Sep-13 TP3 TP3 0.2 - 0.5

Mercury 11 11 0.01 0.039 0.2 µg/g 16-Sep-13 TP4 TP4 0.2 - 0.5

Molybdenum (Mo) 11 11 1.0 ND 2 µg/g 9-Oct-07,16-Sept-13 Multiple Multiple 0.76 - 1.52, 1.52 - 2.25

Nickel (Ni) 11 11 1.0 29 82 µg/g 13-Jun-13 SA3 SA3 0.0 - 0.5

Selenium (Se) 11 11 1.0 ND 1.5 µg/g 13-Dec-12,16-Sept-13 Multiple Multiple 0.76 - 1.52, 1.52 - 2.25

Silver (Ag) 11 11 0.2 ND 0.5 µg/g Multiple SA3 SA3 0.0 - 0.5

Thallium 11 11 1.0 ND 1 µg/g 13-Dec-12,16-Sept-13 BH204/MW BH204/MW-S2 0.76- 1.52

Uranium (U) 11 11 1.0 0.35 2.5 µg/g 20-Mar-14 BH204/MW BH204/MW-S2 0.76- 1.52

Vanadium (V) 11 11 1.0 29.0 86 µg/g 16-Sep-13 TP3 TP3 0.2 - 0.5

Zinc (Zn) 13 15 5 51.1 290 µg/g 16-Sep-13 TP3 TP3 0.2 - 0.5

Cyanide 11 11 0.04 ND 0.051 µg/g Multiple Multiple Multiple Multiple

Electrical Conductivity 11 11 0.01 0.194 0.7 mS/cm 9-Oct-07 BH4 4/2 Multiple

Sodium Adsortion Ratio 11 11 2.9 0.776 5 Unitless 9-Oct-07 EXT/MW8 8/2 Multiple

NOTES:

(1) Maximum concentrations were evalauted from the following reports:

i Supplemental Phase Two Environmental Site Assessment and Remedial Excavation, 6330 16th Avenue, Markham Ontario, Exp Services Inc, Feb 2015

ii Results of Soil Delineation Program, Proposed Residential Development, 6330 16th Avenue, City of Markham, Soil Engineers Ltd., November 1, 2013

iii Soil Sampling and Chemical Analysis, Proposed Residential Development, 6330 16th Avenue, City of Markham, Soil Engineers Ltd., September 25, 2013

iv Results of Chemical Analysis of Soil and Groundwater, Proposed Residential Development, 6330 16th Avenue, City of Markham, Soil Engineers Ltd., July 4, 2013

v Phase Two Environmental Site Assessment, Proposed Residential Development, 6330 16th Avenue, City of Markham, Soil Engineers Ltd., January 29, 2013

vi Phases I and II Environmental Site Assessment, Proposed Residential Development, 6330 16th Avenue, Town of Markham, Soil Engineers Ltd., March 18, 2008

(2) Table 8 Generic Site Condition Standards Within 30 m of 'a Water Body in a Potable Ground Water Condtion.

"Soil, Ground Water and Sediment Standards for use under Part XV.1 of the Environmental Protection Act" Ministry of the Environment, April, 2011

(3) Standards shown are for residential/parkland/institutional/industrial/commercial/community property use

ND - Parameter was reported as not detectable in all samples


µg/g - (micrograms per gram, dry weight basis)

1 of1

Table 7: Maximum Soil Concentration Data- Polycyclic Aromatic Hydrocarbons


Contaminant Name

Number of

Sample

Locations

Number of

Samples

Analysed

Maximum

Reporting

Detection

Limit(1)

Maximum

Concentration(1)

MOE (2011) Table 8

SCS(2,3) Units Date Sampled Borehole Sample I.D.

Sample Depth

(m bg)

Acenaphthene 8 8 0.05 ND 0.072 µg/g Multiple Multiple Multiple 0.76 - 1.22, 305 - 3.75

Acenaphthylene 8 8 0.05 0.0082 0.093 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Anthracene 8 8 0.05 0.016 0.22 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Benzo(a)anthracene 8 8 0.05 0.12 0.36 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Benzo(a)pyrene 8 8 0.05 0.15 0.3 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Benzo(b)fluoranthene 8 8 0.05 0.24 0.47 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Benzo(ghi)perylene 8 8 0.05 0.13 0.68 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Benzo(k)fluoranthene 8 8 0.05 0.084 0.48 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Chrysene 8 8 0.05 0.15 2.8 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Dibenzo(a,h)anthracene 8 8 0.05 0.021 0.1 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Fluoranthene 8 8 0.05 0.32 0.69 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Fluorene 8 8 0.05 0.0051 0.19 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Indeno(1,2,3-cd)pyrene 8 8 0.05 0.12 0.23 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

(1-)2-Methylnaphthalene 8 8 0.042 ND 0.59 µg/g Multiple Multiple Multiple 0.76 - 1.22, 305 - 3.75

Naphthalene 8 8 0.05 ND 0.09 µg/g Multiple Multiple Multiple 0.76 - 1.22, 305 - 3.75

Phenanthrene 8 8 0.05 0.1 0.69 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

Pyrene 8 8 0.05 0.25 1 µg/g 20-MAR-14 BH213 BH213-S5 3.05 -3.75

NOTES:













1 of 1

Table 8: Maximum Soil Concentration Data - Volatile Organic Compounds & Petroleum Hydrocarbons


Contaminant Name

Number of

Sample

Locations

Number of

Samples

Analysed

Maximum

Reporting

Detection

Limit(1)

Maximum

Concentration(1)

MOE (2011) Table 8

SCS(2,3) Units Date Sampled Borehole Sample I.D. Sample Depth (m bg)

VOCs

Acetone 8 9 0.5 ND 0.5 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Benzene 12 13 0.02 ND 0.02 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Bromodichloromethane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Bromoform 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Bromomethane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Carbon Tetrachloride 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Chlorobenzene 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Chloroform 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Dibromochloromethane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

1,2 Dichlorobenzene 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55



Dichlorodifluoromethane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

1,1 Dichloroethane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

1,2 Dichloroethane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

1,1 Dichloroethylene 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

cis-1,2 Dichloroethylene 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

trans-1,2 Dichloroethylene 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

1,2 Dichloropropane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

1,3 Dichloropropene (cis + trans) 8 9 0.042 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Ethylbenzene 12 13 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Ethylene Dibromide 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

n-hexane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Methylene Chloride 8 9 0.5 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Methyl Isobutyl Ketone 8 9 0.5 ND 0.5 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Methyl Ethyl Ketone (2-Butanone) 8 9 0.5 ND 0.5 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Methyl t-butyl ether (MTBE) 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Styrene 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

1,1,1,2 Tetrachloroethane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

1,1,2,2 Tetrachloroethane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Tetrachloroethylene (PCE) 8 9 0.02 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Toluene 12 13 0.2 ND 0.2 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

1,1,1, Trichloroethane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

1,1,2 Trichloroethane 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Trichloroethylene (TCE) 8 9 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Vinyl Chloride 8 9 0.05 ND 0.02 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Trichlorofluoromethane 8 9 0.02 ND 0.25 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

Total Xylenes 12 13 0.05 ND 0.05 µg/g Multiple Multiple Multiple 0.76-1.53, 2.25 - 2.75, 3.05 -3.75, 3.75- 4.55

PHCs

F1 (C6 -C10) 5 5 10 ND 25 µg/g Multiple Multiple Multiple 1.55- 2.25, 3.05 - 3.75, 4.55- 5.30

F2 (.C10 - C16) 5 5 10 ND 10 µg/g Multiple Multiple Multiple 1.55- 2.25, 3.05 - 3.75, 4.55- 5.30

F3 (>C16 - C24) 5 5 50 ND 240 µg/g Multiple Multiple Multiple 1.55- 2.25, 3.05 - 3.75, 4.55- 5.30

F4 (>C24 - C50) 5 5 50 ND 120 µg/g Multiple Multiple Multiple 1.55- 2.25, 3.05 - 3.75, 4.55- 5.30

NOTES:












m bg - metres below grade1 of 1

Table 9: Maximum Soil Concentration Data - Organochlorine Pesticides and Polychlorinaed Biphenyls


Contaminant Name

Number of

Sample

Locations

Number of

Samples

Analysed

Maximum

Reporting

Detection

Limit(1)

Maximum

Concentration(1)

MOE (2011) Table 8

SCS(2,3) Units Date Sampled Borehole Sample I.D.

Sample Depth (m

bg)

Aldrin 3 3 0.002 ND 0.05 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

Chlordane (total) 3 3 0.002 ND 0.05 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

DDD (total) 3 3 0.002 ND 3.3 µg/g 29-Jan-14 BH203 BH203-S2 0. 6 -1

DDE (total) 3 3 0.002 ND 0.26 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

DDT (total) 3 3 0.002 ND 1.4 µg/g 29-Jan-14 BH203 BH203-S2 0. 6 -1

Dieldrin 3 3 0.002 ND 0.05 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

Total Endosulphan 3 3 0.002 ND 0.04 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

Endrin 3 3 0.002 ND 0.04 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

Heptachlor 3 3 0.002 ND 0.15 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

Heptachlor Epoxide 3 3 0.002 ND 0.05 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

Hexachlorobenzene 3 3 0.002 ND 0.02 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

Hexachlorobutadiene 3 3 0.002 ND 0.01 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

Hexachloroethane 3 3 0.002 ND 0.01 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

Lindane 3 3 0.002 ND 0.056 µg/g 29-Jan-14 BH105 BH105-13(2-3') 0.61 - 0.91

Methoxychlor 3 3 0.005 ND 0.13 µg/g 29-Jan-14 BH203 BH203-S2 0. 6 -1

Total PCB 3 3 0.015 ND 0.35 µg/g 29-Jan-14 BH203 BH203-S2 0. 6 -1

NOTES:













µg/g - (micrograms per gram, dry weight basis)

1 of 1

Table 10: Maximum Groundwater Concentration Data - Metals and Inorganics


Contaminant Name

Number of

Sample

Locations

Number of

Samples

Analysed

Maximum

Reporting

Detection

Limit(1)

Maximum

Concentration (1)

MOE (2011) Table 8

SCS(2,3) Units Date of Samped Monitoring Wells Sample I.D.

Screen Interval

(m bg)

Antimony (Sb) 5 10 1.0 ND 6 µg/L 12-Oct-07 Multiple Multiple Multiple

Arsenic (As) 5 10 0.6 3.1 25 µg/L 17-Dec-12 EXT/MW7 EXT MW7 1.5 - 6.0

Barium (Ba) 5 10 0.4 174 1000 µg/L 13-Jun-13 BH-MW1 MW1 3.0 - 6.0

Beryllium (Be) 5 10 1.0 ND 4 µg/L 12-Oct-07 Multiple Multiple Multiple

Boron (B) 5 10 10 193 5000 µg/L 12-Oct-07 EXT/MW7 BH7 1.5 - 6.0

Cadmium (Cd) 5 10 0.1 0.4 2.1 µg/L 13-Jun-13 BH-MW2 MW2 1.0 - 4.5

Chromium (Cr) 5 10 2 1.38 50 µg/L 12-Oct-07 EXT/MW6 BH6 9.1 - 15.2

Chromium VI 5 10 10 ND 25 µg/L Multiple Multiple Multiple Multiple

Cobalt (Co) 5 10 0.5 1.55 3.8 µg/L 17-Dec-12 EXT/MW7 EXT MW7 1.5 - 6.0

Copper (Cu) 5 10 1.0 0.88 69 µg/L 12-Oct-07 EXT/MW6 BH6 9.1 - 15.2

Lead (Pb) 5 10 1.0 ND 10 µg/L 17-Dec-12 Multiple Multiple Multiple

Mercury 5 10 0.1 ND 0.29 µg/L Multiple Multiple Multiple Multiple

Molybdenum (Mo) 5 10 0.5 16.9 70 µg/L 12-Oct-07 EXT/MW6 BH6 1.5 - 6.0

Nickel (Ni) 5 10 1.0 4.5 100 µg/L 13-Jun-13 BH-MW2 MW2 1.0 - 4.5

Selenium (Se) 5 10 5.0 0.98 10 µg/L 12-Oct-07 EXT/MW7 BH7 1.5 - 6.0

Silver (Ag) 5 10 0.2 ND ND µg/L 12-Oct-07 Multiple Multiple Multiple

Sodium (Na) 5 10 500 163,000/147,000 490000 µg/L 17-Dec-12 EXT/MW7 EXT MW7 1.5 - 6.0

Thallium (Th) 5 10 0.3 ND 2 µg/L Multiple Multiple Multiple Multiple

Uranium (U) 5 10 2.0 ND 20 µg/L Multiple Multiple Multiple Multiple

Vanadium (V) 5 10 0.5 1.1 6.2 µg/L 12-Oct-07 EXT/MW7 BH7 1.5 - 6.0

Zinc (Zn) 5 10 5.0 51.8 890 µg/L 12-Oct-07 EXT/MW7 BH7 1.5 - 6.0

Chloride 5 10 2.0 250,000 1,800,000 µg/L 17-Dec-12 EXT/MW7 EXT MW7 1.5 - 6.0

Free Cyanide 5 10 2.0 ND 52 µg/L Multiple Multiple Multiple Multiple

NOTES:













µg/L - (micrograms per litre)

1 of 1

Table 11: Maximum Groundwater Concentration Data - Polycyclic Aromatic Hydrocarbons


Contaminant Name

Number of

Sample

Locations

Number of

Samples

Analysed

Maximum

Reporting

Detection

Limit(1)

Maximum

Concentration(1)

MOE (2011) Table 8

SCS (2,3) Units Date Sampled Monitoring Well Sample I.D.

Screen Interval

(m bg)

Acenaphthene 4 5 0.10 ND 4.1 µg/L 12-Oct-07 Multiple Multiple Multiple

Acenaphthylene 4 5 0.11 ND 1 µg/L 12-Oct-07 Multiple Multiple Multiple

Anthracene 4 5 0.05 ND 1 µg/L 12-Oct-07 Multiple Multiple Multiple

Benzo(a)anthracene 4 5 0.08 ND 1 µg/L 12-Oct-07 Multiple Multiple Multiple

Benzo(a)pyrene 4 5 0.01 ND 0.01 µg/L 12-Oct-07 Multiple Multiple Multiple

Benzo(b)fluoranthene 4 5 0.03 ND 0.1 µg/L 12-Oct-07 Multiple Multiple Multiple

Benzo(ghi)perylene 4 5 0.06 ND 0.2 µg/L 12-Oct-07 Multiple Multiple Multiple

Benzo(k)fluoranthene 4 5 0.05 ND 0.1 µg/L 12-Oct-07 Multiple Multiple Multiple

Chrysene 4 5 0.05 ND 0.1 µg/L 12-Oct-07 Multiple Multiple Multiple

Dibenzo(a,h)anthracene 4 5 0.09 ND 0.2 µg/L 12-Oct-07 Multiple Multiple Multiple

Fluoranthene 4 5 0.12 ND 0.41 µg/L 12-Oct-07 Multiple Multiple Multiple

Fluorene 4 5 0.09 ND 120 µg/L 12-Oct-07 Multiple Multiple Multiple

Indeno(1,2,3-cd)pyrene 4 5 0.03 ND 0.2 µg/L 12-Oct-07 Multiple Multiple Multiple

(1-)2-Methylnaphthalene 4 5 0.028 ND 3.2 µg/L 17-Dec-12 Multiple Multiple Multiple

Naphthalene 4 5 0.12 0.14 11 µg/L 12-Oct-07 EXT/MW6 BH6 9.1 - 15.2

Phenanthrene 4 5 0.11 ND 1 µg/L 12-Oct-07 Multiple Multiple Multiple

Pyrene 4 5 0.05 ND 4.1 µg/L 12-Oct-07 Multiple Multiple Multiple

NOTES:













µg/L - (micrograms per litre)

1 of 5/4/2015

Table 12: Maximum Groundwater Concentration Data- Volatile Organic Compounds & Petroleum Hydrocarbons


Contaminant Name

Number of

Sample

Locations

Number of

Samples

Analysed

Maximum

Reporting

Detection Limit

Maximum

Concentration (1)

MOE (2011) Table 8 SCS

(2) Units Date Sampled Monitoring Well Sample I.D. Screen Interval (m bg)

VOCs

Acetone 15 46 10 ND 2700 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Benzene 15 46 0.2 ND 5 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Bromodichloromethane 15 46 0.5 ND 16 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Bromoform 15 46 1 ND 25 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Bromomethane 15 46 0.5 ND 0.89 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Carbon Tetrachloride 15 46 0.2 ND 0.79 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Chlorobenzene 15 46 0.05 ND 30 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Chloroform 15 46 0.2 ND 2.4 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Dibromochloromethane 15 46 0.5 ND 25 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

1,2 Dichlorobenzene 15 46 0.5 ND 3 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25



Dichlorodifluoromethane 15 46 1 ND 590 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

1,1 Dichloroethane 15 46 0.2 ND 5 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

1,2 Dichloroethane 15 46 0.5 ND 1.6 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

1,1 Dichloroethylene 15 46 0.2 ND 1.6 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

cis-1,2 Dichloroethylene 15 46 0.5 ND 1.6 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

trans-1,2 Dichloroethylene 15 46 0.5 ND 1.6 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

1,2 Dichloropropane 15 46 0.2 ND 5 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

1,3 Dichloropropene 15 46 0.3 ND 0.5 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Ethylbenzene 15 46 0.2 ND 2.4 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Ethylene Dibromide 15 46 0.2 ND 0.2 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

n-Hexane 15 46 1 ND 51 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Methylene Chloride 15 46 2 ND 50 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Methyl Isobutyl Ketone 15 46 5 ND 640 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Methyl Ethyl Ketone (2-Butanone) 15 46 10 ND 1800 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Methyl t-butyl ether (MTBE) 15 46 0.5 ND 15 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Styrene 15 46 0.5 ND 5.4 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

1,1,1,2 Tetrachloroethane 15 46 0.5 ND 1.1 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

1,1,2,2 Tetrachloroethane 15 46 0.5 ND 1 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Tetrachloroethylene 15 46 0.2 ND 1.6 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Toluene 15 46 0.2 ND 22 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

1,1,1, Trichloroethane 15 46 0.2 ND 200 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

1,1,2 Trichloroethane 15 46 0.5 ND 4.7 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Trichloroethylene 15 46 0.2 ND 1.6 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Trichlorofluoromethane 15 46 0.5 ND 150 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Vinyl Chloride 15 46 0.2 ND 0.5 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

Total Xylenes 15 46 0.2 ND 300 µg/L Multiple Multiple Multiple 1.03- 4.13, 1.35 - 4.45,1.39 - 4.59, 1.54- 4.64, 1.65- 2.75,, 1.7 -4.8, 2.08 -5.18,2.97 - 6.07, 9.15- 12.25

PHCs

F1 (C6 -C10) 2 2 25 ND 420 µg/L 13-Jun-13 BH-MW1,BH-MW2 MW1, MW2 1 - 4.5, 3 - 6

F2 (.C10 - C16) 2 2 100 ND 150 µg/L 13-Jun-13 BH-MW1,BH-MW2 MW1, MW2 1 - 4.5, 3 - 6

F3 (>C16 - C24) 2 2 100 ND 500 µg/L 13-Jun-13 BH-MW1,BH-MW2 MW1, MW2 1 - 4.5, 3 - 6

F4 (>C24 - C50) 2 2 100 ND 500 µg/L 13-Jun-13 BH-MW1,BH-MW2 MW1, MW2 1 - 4.5, 3 - 6

NOTES:













µg/L - (micrograms per litre) 1 of 1

Table 13: Summary of Southeast Quadrant Pre-Remediation Soil Sampling for Barium and Chromium VI


Sample Location BH/MW4 BH5 TP-01 TP-02 TP-03 TP-04 TP-05 TP-06 TP-07 TP-08

Sample ID BH4/1 BH4/1 S 28-11-14-03 S 28-11-14-03 S 28-11-14-03 S 28-11-14-03 S 28-11-14-03 S 28-11-14-03 S 28-11-14-03 S 28-11-14-03

MOE (2011) Sample Depth (m bg) 0-1.6 0.1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6

Parameter(1) Table 8 SCS Sample Date 13-Dec-12 13-Dec-12 28-Nov-14 28-Nov-14 28-Nov-14 28-Nov-14 28-Nov-14 28-Nov-14 28-Nov-14 28-Nov-14

Barium 220 250 NA NA NA NA NA NA 14 27 NA

Chromium VI 0.66 2.44 1.13 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2

Notes:

(1) All concentration units are micrograms per gram (μg/g) unless indicated otherwise

(2) "Soil, Ground Water and Sediment Standards for use under Part XV.1 of the Environmental Protection Act" Ministry of the Environment, April, 2011

(3) Table 8 Generic Site Condition Standards Within 30 m of a Water Body in a Potable Ground Water Condtion.

<0.2 - Parameter was non detected at the indicated reporting detection limit.

2.44 - Bolded values exceed the MOE (2011) Table 8 SCS

NV - No value derived

NA - Not analyzed


1 of 1

Table 14: Summary of Northeast Quadrant Pre-Remediation Delineation Soil Sampling for Methylene Chloride


Sample Location BH3 SA1 SA2 SA3 SA4 SA5 BH210/MW BH211/MW BH212/MW BH214

Sample ID BH3-1 SA1 SA2 SA3 SA4 SA5 BH211/MW S6 BH211/MW S6 BH212/MW S6 BH214 S2

MOE (2011) Sample Depth (m bg) 0 - 1.6 0.7 0.6 0.6 0.5 0.5 3.05 - 3.6 3.8 - 4.6 3.8 - 4.6 0.76 - 1.5

Table 8 SCS Sample Date 13-Dec-12 10/30/2013 30-Oct-13 30-Oct-13 30-Oct-13 30-Oct-13 18-Mar-14 18-Mar-14 19-Mar-14 18-Mar-14

Methylene Chloride 0.343 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.050 <0.050 <0.050

Notes:






NV - No value derived

NA - Not analyzed


Parameter(1)

1 of 1

Sample Location EXTMW6 BH212/MW BH213 BH213 BH214

Sample ID 6/5 BH212/MW S5 BH213 S2 BH213 S5 BH214 S5

MOE Table 8 Sample Depth (m bg) 3.05 -3.06 3.05 -3.06 0.07 - 1.52 3.05 -3.06 3.05 -3.06

Parameter(1)

SCS(2,3)

Sample Date 10/7/2007 3/19/2014 3/20/2014 3/20/2014 3/20/2014

Acenaphthene 0.072 <0.03 <0.0050 <0.0050 <0.0050 <0.0050

Acenaphthylene 0.093 <0.02 <0.0050 0.0082 <0.0050 <0.0050

Anthracene 0.22 0.1 <0.0050 0.016 <0.0050 <0.0050

Benzo(a)anthracene 0.36 0.66 <0.0050 0.12 <0.0050 <0.0050

Benzo(a)pyrene 0.3 0.56 <0.0050 0.15 <0.0050 <0.0050

Benzo(b/j)fluoranthene 0.47 0.48 <0.0050 0.24 <0.0050 <0.0050

Benzo(ghi)perylene 0.68 0.36 <0.0050 0.13 <0.0050 <0.0050

Benzo(k)fluoranthene 0.48 0.47 <0.0050 0.084 <0.0050 <0.0050

Chrysene 2.8 0.75 <0.0050 0.15 <0.0050 <0.0050

Dibenzo(a,h)anthracene 0.1 0.09 <0.0050 0.021 <0.0050 <0.0050

Fluoranthene 0.69 1.5 <0.0050 0.32 <0.0050 <0.0050

Fluorene 0.19 0.02 <0.0050 0.0051 <0.0050 <0.0050

Indeno(1,2,3-cd)pyrene 0.23 0.36 <0.0050 0.12 <0.0050 <0.0050

1-Methylnaphthalene 0.59 NA <0.0050 <0.0050 <0.0050 <0.0050

2-Methylnaphthalene 0.59 NA <0.0050 <0.0050 <0.0050 <0.0050

1& 2 Methylnaphthalene 0.59 NA <0.0050 <0.0050 <0.0050 <0.0050

Naphthalene 0.09 <0.03 <0.0050 <0.0050 <0.0050 <0.0050

Phenanthrene 0.69 0.35 <0.0050 0.1 <0.0050 <0.0050

Pyrene 1 1.3 <0.0050 0.25 <0.0050 <0.0050

Notes:







Table 15: Summary of Northeast Quadrant Pre-Remediation Delineation Soil Sampling for PAHs


1 of 1

Table 16: Remedial Excavation Summary


Excavation

Number Location(1)

Length Width Depth

Southeast quadrant,

west of drivway

Northeast Quadrant

near lake

Northeast Quadrant

near lake

Southeast quadrant,

near southwest corner of house

Notes:

(1) Refer to Figure 9 for excavation locations.

m - metres

EXC A

EXC B

EXC C

EXC D

3.5

2 - 2.5

4.5 1.7

3.9 2.1 1.7

Excavation Dimensions (m)

2 1.8

5.5 3.6

3.5



Excavation

Ecavation Surface Base Base South Wall

Location Identifier(1)

ECA- A-B1 EXC-A-B2 EXC-A-S1

Sample ID S-03/02/15-597-03 S-03/02/15-597-04 S-03/02/15-597-02 S-03/02/15-597-05 S-03/02/15-597-01

Sample Depth (m bg) 1.7 1.7 1.6

Parameter(1)

Sample Date 3-Feb-15 3-Feb-15 3-Feb-15

Metals

Barium NA NA NA NA NA

Chromium VI <0.2 <0.2 <0.2 <0.2 <0.2

PAHS

Acenaphthene NA NA NA NA NA

Acenaphthylene NA NA NA NA NA

Anthracene NA NA NA NA NA

Benzo(a)anthracene NA NA NA NA NA

Benzo(a)pyrene NA NA NA NA NA

Benzo(b/j)fluoranthene NA NA NA NA NA

Benzo(ghi)perylene NA NA NA NA NA

Benzo(k)fluoranthene NA NA NA NA NA

Chrysene NA NA NA NA NA

Dibenzo(a,h)anthracene NA NA NA NA NA

Fluoranthene NA NA NA NA NA

Fluorene NA NA NA NA NA

Indeno(1,2,3-cd)pyrene NA NA NA NA NA

1-Methylnaphthalene NA NA NA NA NA

2-Methylnaphthalene NA NA NA NA NA

1& 2 Methylnaphthalene NA NA NA NA NA

Naphthalene NA NA NA NA NA

Phenanthrene NA NA NA NA NA

Pyrene NA NA NA NA NA

VOCs

Methylene Chloride NA NA NA NA NA

Notes:

(1) Refer to Figure x for confirmatory sample locations.



Table 8 Generic Site Condition Standards Within 30 m of 'a Water Body in a Potable Ground Water Condtion.



MOE Table 8

0.05

0.69

SCS(2,3)

0.072

0.093

0.22

0.36

0.3

0.23

0.59

0.59

0.59

0.09

0.47

0.68

0.48

2.8

0.1

0.69

1

EXC A

220

0.66

West Wall

EXC-A-W1

1.5

3-Feb-15

0.19

1 of 4



Excavation

Ecavation Surface


Sample ID

Sample Depth (m bg)

Parameter(1)

Sample Date

Metals

Barium

Chromium VI

PAHS

Acenaphthene

Acenaphthylene

Anthracene

Benzo(a)anthracene

Benzo(a)pyrene

Benzo(b/j)fluoranthene

Benzo(ghi)perylene

Benzo(k)fluoranthene

Chrysene

Dibenzo(a,h)anthracene

Fluoranthene

Fluorene

Indeno(1,2,3-cd)pyrene

1-Methylnaphthalene

2-Methylnaphthalene

1& 2 Methylnaphthalene

Naphthalene

Phenanthrene

Pyrene

VOCs

Methylene Chloride

Notes:







MOE Table 8

0.05

0.69

SCS(2,3)

0.072

0.093

0.22

0.36

0.3

0.23

0.59

0.59

0.59

0.09

0.47

0.68

0.48

2.8

0.1

0.69

1

220

0.66

0.19

Base Base North Wall South Wall

ECA- B-B1 EXC-B-B2 EXC-B-N1 EXC-B-S1

S-03/02/15-597-06 S-03/02/15-597-07 S-03/02/15-597-08 S-03/02/15-597-09

3.7 3.6 3.1 3.1

3-Feb-15 3-Feb-15 3-Feb-15 3-Feb-15

NA NA NA NA

NA NA NA NA

0.009 <0.0050 0.0057 <0.0050

<0.0050 <0.0050 <0.0050 <0.0050

0.02 <0.0050 0.016 0.0065

0.13 0.011 0.12 0.052

0.14 0.013 0.13 0.061

0.22 0.021 0.22 0.1

0.11 0.011 0.11 0.056

0.069 0.007 0.07 0.032

0.13 0.013 0.11 0.053

0.02 <0.0050 0.021 0.0095

0.3 0.032 0.29 0.14

0.01 <0.0050 0.0057 <0.0050

0.12 0.011 0.12 0.057

0.0075 <0.0050 <0.0050 <0.0050

0.0085 <0.0050 <0.0050 <0.0050

0.016 <0.0050 <0.0050 <0.0050

<0.0050 <0.0050 <0.0050 <0.0050

0.13 0.011 0.1 0.049

0.23 0.024 0.22 0.11

NA NA NA NA

EXC B

2 of 4



Excavation

Ecavation Surface


Sample ID

Sample Depth (m bg)

Parameter(1)

Sample Date

Metals

Barium

Chromium VI

PAHS

Acenaphthene

Acenaphthylene

Anthracene

Benzo(a)anthracene

Benzo(a)pyrene


Benzo(ghi)perylene


Chrysene


Fluoranthene

Fluorene


1-Methylnaphthalene

2-Methylnaphthalene


Naphthalene

Phenanthrene

Pyrene

VOCs

Methylene Chloride

Notes:







MOE Table 8

0.05

0.69

SCS(2,3)

0.072

0.093

0.22

0.36

0.3

0.23

0.59

0.59

0.59

0.09

0.47

0.68

0.48

2.8

0.1

0.69

1

220

0.66

0.19

Base Base North Wall East Wall

ECA- C-B1 EXC-C-B2 EXC-C-N1 EXC-C-E1

S-03/02/15-597-10 S-03/02/15-597-11 S-03/02/15-597-12 S-03/02/15-597-13

1.7 1.7 1.5 1.4

3-Feb-15 3-Feb-15 3-Feb-15 3-Feb-15

NA NA NA NA

NA NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA

NA NA NA NA

<0.05 <0.05 <0.05 <0.05

EXC C

3 of 4



Excavation

Ecavation Surface


Sample ID

Sample Depth (m bg)

Parameter(1)

Sample Date

Metals

Barium

Chromium VI

PAHS

Acenaphthene

Acenaphthylene

Anthracene

Benzo(a)anthracene

Benzo(a)pyrene


Benzo(ghi)perylene


Chrysene


Fluoranthene

Fluorene


1-Methylnaphthalene

2-Methylnaphthalene


Naphthalene

Phenanthrene

Pyrene

VOCs

Methylene Chloride

Notes:







MOE Table 8

0.05

0.69

SCS(2,3)

0.072

0.093

0.22

0.36

0.3

0.23

0.59

0.59

0.59

0.09

0.47

0.68

0.48

2.8

0.1

0.69

1

220

0.66

0.19

Base Base West Wall East Wall

ECA- D-B1 EXC-D-B2 EXC-D-W1 EXC-D-E1

S-03/02/15-597-14 S-03/02/15-597-16 S-03/02/15-597-15 S-03/02/15-597-17

1.7 1.7 1.6 1.5

3-Feb-15 3-Feb-15 3-Feb-15 3-Feb-15

12 12 12 12

<0.2 <0.2 <0.2 <0.2

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

NA NA NA NA

EXC D

4 of 4

Attachment A: Survey Plan