Hart Village 132 Harts Lane City of Guelph Environmental Implementation Report Addendum

321 Pages·2017·29.64 MB·English

Hart Village

132 Harts Lane
City of Guelph

Environmental Implementation
Report Addendum

Prepared for:

Carrington Farm Trust
45 Speedvale Avenue East, Unit #5
Guelph, Ontario N1H 1J2

Project No. 1374 ӏ January 2017
Hart Village

Environmental Implementation Report Addendum

Project Team:

David Stephenson Senior Biologist, Project Manager
Nathan Miller Terrestrial and Wetland Biologist
Gerry Schaus GIS Analyst

Report submitted on January 17, 2017

___________________________
David Stephenson
Senior Project Manager

225 Labrador Drive, Unit 1, Waterloo, Ontario, N2K 4M8 Tel: [phone] Web: www.nrsi.on.ca Email: [email protected]
TABLE OF CONTENTS

1.0 Introduction ............................................................................................... 5
2.0 Phasing Plan ............................................................................................. 7
3.0 Stormwater Management ......................................................................... 9
3.1 Stormwater Management Background .............................................................. 9
3.2 Proposed Stormwater Management Plan.......................................................... 9
3.2.1 Overview .................................................................................................... 9
3.2.2 Permeameter Testing ............................................................................... 11
3.2.3 Site Plan Controls .................................................................................... 12
3.2.4 Water Balance Analysis ........................................................................... 14
3.2.5 Water Quality ........................................................................................... 17
3.3 Erosion and Sediment Control Plan ................................................................ 18
4.0 Harts Lane Re-construction and Mitigation Measures ........................ 20
Agency Comments Related to Harts Lane Re-construction ......................... 20
5.0 Natural Feature Monitoring and Mitigation Program ........................... 24
5.1 Monitoring Plan ................................................................................................ 25
5.1.1 Construction Monitoring ........................................................................... 26
5.1.2 Success of Vegetation Relocations and Restoration Plantings ................. 28
5.1.3 Mitigation Effectiveness Monitoring Methodology ..................................... 28
5.2 Mitigation Effectiveness Baseline Monitoring Results .................................. 51
6.0 Buckthorn Removal/Monitoring ............................................................. 57
6.1.1 Site Preparation ....................................................................................... 58
6.1.2 Schedule .................................................................................................. 61
6.1.3 Buckthorn Removal Impacts .................................................................... 62
7.0 Summary .................................................................................................. 63
8.0 References ............................................................................................... 64

List of Tables
Table 1. Supporting Documents 6
Table 2. Mitigation Effectiveness Monitoring Overview 30
Table 3. Baseline Vegetation Plot Monitoring Summary 55
Table 4. Buckthorn Control Options 60
Table 4. Timing Windows for Implementation of Buckthorn Control 61

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List of Maps
Map 1 Subject Property
Map 2a Water Monitoring Locations
Map 2b Terrestrial Monitoring Locations
Map 3 Pedestrian Trail and Development Plan
Map 4 Harts Lane Re-construction

List of Appendices
Appendix I EIR City and EAC Comments
Appendix II Comment Response Table
Appendix III Tree Preservation Plan
Appendix IV Grading Plans (GMBluePlan 2017)
Appendix V SWM Design Report (GMBluePlan 2017)
Appendix VI Water Balance (GMBluePlan 2017)
Appendix VII Erosion and Sediment Control Plan (GMBluePlan 2017)
Appendix VIII Landscape Plans (Mackinnon & Associates 2017)
Appendix IX Salt Management Plan
Appendix X Erosion and Sediment Control Inspection Sample Checklist
Appendix XI Species Sighting Protocol
Appendix XII Monitoring Well and Piezometer Hydrographs (GMBluePlan 2016)
Appendix XIII Surface Water Monitoring Results (GMBluePlan 2016)
Appendix XIV Buckthorn Removal Letter (NRSI 2013)
Appendix XV Enviro Guide Insert
Appendix XVI Barn Swallow Nest Structure Details (GMBluePlan 2017)
Appendix XVII Hydrogeological Assessment to Address Risks Associated with Seasonal
High Groundwater Table (GM BluePlan 2017)

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1.0 Introduction
Natural Resource Solutions Inc. (NRSI), along with Astrid J. Clos Planning Consultants
and GM BluePlan Engineering were retained by Carrington Farm Trust to complete an
Environmental Implementation Report (EIR) Addendum to satisfy the requirements of
the City of Guelph. This EIR Addendum also addresses recommendations from the
Environmental Advisory Committee (EAC) review of the August 2016 EIR during the
November 9, 2016 EAC meeting. All agency comments on the EIR are provided in
Appendix I.

This EIR has been prepared to satisfy conditions of approval and respond to comments
from the City of Guelph Environmental and Parks Planning staff and EAC staff following
their review of the August 2016 EIR. Components of this report arise from the following:
 Comments provided in the November 9, 2016 staff report prepared by April Nix,
Environmental Planner (City of Guelph) following the review of the August 2016
EIR carried out by Beacon Environmental;
 Beacon Environmental comments provided for the City dated November 8, 2016;
 Comments provided by Helen White, Park Planner (City of Guelph) following the
review of the August 2016 EIR;
 Final comments provided by April Nix in a letter dated November 10, 2016
including draft motions from EAC.

This EIR Addendum includes revised sections of the May 2016 EIR report that received
substantial comments, generally related to Stormwater Management, phasing of
development, re-construction of Harts Lane, environmental monitoring and habitat
enhancements. Minor comments on the EIR from the City, EAC and Beacon
Environmental that do not require a detailed discussion have been addressed within the
‘Comment Response Table’ in Appendix II. In addition, a revised Tree Protection Plan
(TPP) has also been provided in Appendix III with revisions based on the Beacon
Environmental comments.

Following the submission of this EIR Addendum to the City of Guelph, this report will
return to EAC for final review.

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This EIR Addendum is prepared as part of a package for submission and review, and
the reader is referred to the associated documents identified in Table 1 for further
details:
Table 1. Supporting Documents
Report Author Date
Stormwater Management Design Report January 9, 2017
Hydrogeological Study May 22, 2015
Updated Water Balance GM BluePlan January 8, 2017
Site Grading and Stormwater Management Plan January 10 2017
Sediment and Erosion Control Plan January 10 2017
Site Plan Astrid J. Clos December 21, 2015
Planning
Consultants
Landscape Plan MacKinnon January 11, 2017
Trail Design and Associates January 11, 2017

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2.0 Phasing Plan
Additional details were requested on phasing to specify when various construction,
servicing, landscaping and monitoring activities are to take place. Comments from
Beacon Environmental are provided below along with the NRSI response.

Agency Comments Related to Phasing
Beacon Environmental (Nov.8, 2016): PHASING OF DEVELOPMENT: The Phasing
Plan is discussed at a high level in the EIR (Section 5.4) and is referenced on the
grading plans (simply as “phase boundary”). However, no overall Phasing Plan was
included in the EIR, and Harts Lane has been excluded from this planning. Furthermore,
the timing of the various habitat management and restoration works in relation to the
phasing is unclear. For example, if the Barn Swallow structure in currently in the Phase 2
area but close to the limits of Phase 1, when will it be moved to the buffer area adjacent
to Block 121? Will the buffer plantings be undertaken in two different phases? What
about the proposed plantings associated with Harts Lane? Please provide an overall
Phasing Plan that includes Harts Lane and supporting text that describes the key tasks
to be undertaken as part of each phase, including habitat management works and
monitoring.

NRSI Response:
Construction will occur across 3 separate phases. Phase 1 will encompass the southern
portion of the subject property and will include construction of the southern lots and
associated portions of Lovett Lane, Ryder Avenue and Carrington Drive. Phase 1 will
also include the construction of the SWM Block 124 and the maintenance access for
SWM Block 123. Phase 2 will encompass the residential subdivisions to the north and
Phase 3 will involve the construction of the Apartment and Townhouse Blocks. Specific
steps of the development, mitigation measures, monitoring and enhancements are
detailed below:

Phase 1
 Servicing of water and sanitary is to occur within Phase 1 including on Harts
Lane completed by the City;
 Construction of the Harts Lane cul-de-sac by the City;
 Construction of southern lots (up to lot 20) and associated portions of Lovett
Lane;
 Stormwater Management (SWM) Block 124 construction and maintenance
access;

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 Trail construction surrounding the SWM facility as well as on Harts Lane portion
completed by the City. Within Harts Lane, a granular fill will be place here until
the asphalt trail construction is requested/paid for by the City;
 Mitigation effectiveness monitoring begins at 90% buildout of Phase 1 as
described in Section 5.0 (Harts Lane portion paid for by the City);
 Compensation plantings for entire site to be completed during Phase 1 within
buffers as well as along Harts Lane (which portion will be paid for by the City);
 Barn Swallow nest structure to be moved to final location at buffer edge within
the amenity block; and
 Buckthorn management activities are to be carried out prior to landscape
plantings of native species.

Phase 2
 Construction of central portion of subdivision and roadways between Ryder
Avenue and the northern portion of Lovett Lane;
 Barn Swallow nest structure will be moved from the Phase 2 lands into Phase 3
upon initiation of grading. This will occur outside the nesting season for this
species; and
 Mitigation effectiveness monitoring begins at 90% buildout of Phase 2 as
described in Section 5.0.

Phase 3
 Apartment and Townhouse block construction;
 Mitigation effectiveness monitoring begins at 90% buildout of Phase 3 as
described in Section 5.0; and
 Trail construction along the edge of Block 122 on City property.

Phasing is also shown on the Grading Plans provided in Appendix IV.

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3.0 Stormwater Management
City comments on the SWM plan have been addressed within the GMBluePlan
submission documents (2017). The revised SWM plan provided by GMBluePlan has
been incorporated into the EIR Addendum text below. Where specific ecological
comments were provided related to the SWM plan, these comments have been provided
below along with a response.
3.1 Stormwater Management Background
In preparation of the EIR Addendum, the consulting team prepared the following studies
to characterize the hydrogeology on-site, outline functional services and develop a
stormwater management approach:

 Stormwater Management Design Report – Hart’s Village Subdivision. Revised
January 9, 2017 (GMBluePlan 2017a)
 Hydrogeological Study - Hart Subdivision, 132 Harts Lane West Part of Lot 4,
Concession 7, City of Guelph, County of Wellington. Revised May 22, 2015
(GMBluePlan 2015);
 Hart’s Village Subdivision, Hydrogeological Assessment to Address Risks
Associated with Seasonal High Groundwater Table, January 9, 2017
(GMBluePlan 2017b); and
 Hart’s Village Subdivision, Water Balance, January 8, 2017 (GMBluePlan 2017c).

The revised SWM Design Report has been provided in Appendix V and the revised
water balance provided in Appendix VI.
3.2 Proposed Stormwater Management Plan
3.2.1 Overview
The objectives of the Stormwater Management Plan (GMBluePlan 2017a) are as
follows:
 “Provide quantity control to attenuate the rate of post-development
stormwater runoff to the pre-development flow rates for a full range of
design storm events (2-, 5- and 100-year).
 Provide enhanced (80% TSS) water quality control prior to discharge from
the site.
 Maintain the recharge and runoff rates of the pre-development site.”

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The intent of the SWM strategy is to maintain the pre-development conditions, and in
particular to maintain flows directed towards the wetland. The SWM strategy is a
“treatment train approach” with lot level, conveyance, and end-of-pipe management
practices which will provide the required water quality and quantity controls
(GMBluePlan 2017a).

The SWM system for Harts Lane has been designed to convey and attenuate the full
range of storm events up to and including the 100 year storm (GMBluePlan 2017a).

Control at the lot level consists of foundation drainage, rear yard swales and low impact
development measures. Sump pumps will also be provided and will be directed to rear
yards (GMBluePlan 2017a).

Rear yard swales have been developed according to City of Guelph standards and the
lengths of swales have been maximized to increase contact time with the grassed
surfaces. To promote infiltration, the average depth of topsoil will be 300mm.

In addition, infiltration structures are to be placed in Block 120, Block 121 and Block 123
up gradient of wetlands in order to maintain and enhance infiltration (GMBluePlan
2017a). This includes the following structures:

 A 50m long infiltration structure will be located within the Townhouse Block 120
adjacent to the park and will consist of a 300mmdiameter pipe inside a 2.0m x
0.5m clearstone jacket. This structure will have a total storage volume of
15.49m3. This structure will receive clean rooftop and grassed area runoff from
the Townhouse Block;
 A 50m long infiltration structure will be located within the Apartment Block 121
adjacent to the wetland buffer and will consist of a 300mm diameter pipe inside a
2.0m x 0.5m clearstone jacket. This structure will have a total storage volume of
15.049m3. This structure will receive clean rooftop and grassed area runoff from
the Apartment Block ; and
 A 130.9m long infiltration structure will be located within the SWM Block 123
north of Harts Lane and will consist of a 2.0m x 0.5m clearstone jacket. This

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