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Michae’ Pacholok, Purchasing and Materia’s Management Division Joanne KehoeChief Purchasing Officer City Hall 18th Floor West Tower Manager

100 Queen Street West Professional Services

Toronto, Ontario M5H 2N2

April 6, 2018 Via Internet Posting (8 pages)

ADDENDUM NO. 1Request to Proposal No. 9117-18-7074

RE: Professional Engineering Services for Hydraulic Transients Study on the WaterDistribution and Transmission Systems

Revised Closing Date: April 27, 2018 at 12:00 noon (local Toronto time)

Please refer to the above Request to Proposal (REP) in your possession and be advised of thefollowing revisions.

A1.1. EXTENSIONS

a) Extended Closing Date from April 20, 201 8 to April 27, 2018.

b) Extended Deadline for Addenda from April 1 3, 201 8 to April 20, 2018.

C) Extended Deadline for Questions from April 6, 201 8 to April 1 3, 2018.

Al .2. REVISED Scope of Work

a) Section 2.1 Project Overview —Revised “$600,000.00.” to:

“$600,000.00, inclusive of all taxes and exclusive of contingency costs.”

b) Section 2.1 .1 8 — Added to end of paragraph #18; “Intention is to identify the causefor transient on the City’s vertical and linear infrastructure.”

c) Section 2.2.3.k — Task 3 — Development of monitoring and inspection plan —

Revised to:

“The monitoring period can be no less than 6 weeks” to “The City foresees fieldstudies to take between 4-6 weeks”

Al .3. REVISED Subsection 3 — Organization CharL and Project Team

a) Section 3.4.7.c.1 .b - Team Members Individual Experiencel Project Overview —

Revised “InfoSurge 1 1 .X” to “InfoSurge 1 1 .X I HAMMER”

Al .4. REVISED City Reference Documents and Standards

a) Section 7.2.j — Revised “Node elevations (assigned from DEM);” to:

“Node elevations (assigned from DEM and available ground elevations fromToronto Water’s GIS database and watermain models. Intermediate nodes onwatermains available in some transmission mains, but elevations are not confirmed.Use asbuilts or field data to confirm all intermediate elevations.);”

b) Section 7.2.o — Added to end of point 0:

“. . . integrated with trunk transmission model. Also, basic model statistics are below:The number of nodes, pipes, and pipe length was round up in order to considerfour (4) pockets outside PDY/1W and PD2 that are part of the study area.. 10,000 nodes. 15,000 pipes. 1 ,400 km pipes. Size range 25-2,250 mm. Elevation range 65-160m. Median elevation = 1 OOm. Hydrant laterals NOT included in model

All model nodes are assigned the surface elevation and do not necessarilycapture inflection points in the actual mains. However, consultant can utilize theelevation layer to add more nodes as required.”

c) Section 7.2.p — Added to end of point p:

“The sampling rate for the City’s “iHistorian” collectors which are currently used fordisplaying trends is five (5) seconds. The fastest scan rate available for iHistoriancollector is 1 second.”

A1.5. QUESTIONS AND ANSWERS

01 . The core objective of the project is to essentially build/expand upon an existingmodel (i.e., recently updated and calibrated InfoWater model). Given the specialtynature of the type of work and the fact that the level of effort required significantlydepends on the specifics of the existing model, will the City consider providing acopy of the InfoWater hydraulic model to the proponents as part of the RFPprocess? This would also level the playing field for all proponents, especially sincesome already have access to the model.

Al . No. The City will provide a snapshot of the models in the next addenda.

02. Can the City provide a map of all JOS flow and pressure monitoring locations inPD1IW and PD2?

A2. Yes. City will provide a PDF of the JOS model in the next addenda.

03. Does the City have existing air valve chamber inspection reports and/or a singlelist of all valve chambers with air valves that can be used for the project? If not, canthe City elaborate on what air valve data will be made available as part of theinventory?

A3. Yes. The data must be requested from Water Supply after project reward.

Addendum No. 1April 6, 2018

04. Are vertical profiles of some or all transmission mains available in a dig Wzedformat (LeO, e’evation as a function of distance/chainage)?

A4. Vertical profiles are available from as built drawings.

05. What is the typical sampling and recording frequency of SCADA data at thenoted facilities? Can this frequency be temporarily increased during the monitoringperiod, and if so, to what reasonable maximum recording frequency?

A5. See A1.4.c

06. Will the City consider revising the 1 5 year experience requirement to 1 0 years forsome of the required personnel/roles such as modelling lead and/or technical lead?If not, would the City consider accepting one individual for two roles especially giventhe nature of the specialty required?

A6. Yes to both questions.

07. Will the City consider revising the expertise requirement such that it more directlyrelates to the core project tasks of transient modelling, transient pressuremonitoring, and transient field testing. The current requirements appear generic tobasic modelling and general field work, with only a cursory (and not quantified)reference to transient related experience.

A7. Yes.

Addendum No. 1April 6, 2018

REVISED TABLE 5-1 , 5-2, and 5-3

(Must be inserted into the sealed Cost of Services Envelope)

Addendum No. 1April 6, 2018

Table 5-1

Upset Limit Cost Breakdown for Base Scope of work

Professional Engineering Services for Hydraulic Transients Study on the WaterDistribution and Transmission Systems

ItemNo. Deliverables Cost ($)

Project Management, Coordination and Change Management including

1 meetings

2 TM1 —Design Criteria and Standards

3 TM2 —Data Collection and Transient Model Development

4 TM3—Development of monitoring and inspection plan

5 TM4-Field Inspection, Transient Monitoring and Testing

6 TM5-Data Analysis and Transient Pressure Model Validation

7 City—wide Implementation Strategy Report

9 Final Summary Report

1 0 Final Model — including all scenarios

1 1 Disbursements (5%)

SubtotalHST (13%)

TOTAL INCLUSIVE OF HST

GRAND TOTAL OF TABLE 5-1, 5-2, and 5-3. INCLUSIVE OF HST

Addendum No. 1April 6, 2018

Table 5-2

Table of Provisional Cash Allowance Items

Item Description Amount

(exci. HST)

Schedule of Allowance Items — Study

1 Health & Safety equipment (All PPEs, gas monitoring and other confine $ 5,000.00

space entry equipment must be included in unit price for monitoring)

2 Rental of ten (10) transient data loggers $ 50,000.00

3 Allowance for Additional Field Monitoring and Investigation $ 30,000.00

4 Allowance for Additional Field Monitoring Equipment $ 5,000.00

5 Accounting Audit Report as mentioned in section 7.3.7 $ 8,000.00

Subtotal $Schedule of Allowance Items — Additional Tasks

Rate Adjustment (Escalation) as per 5.2 $Catering for workshops and meetings $ I ,000

Subtotal — Additional Tasks $HST(13%) $

TOTAL INCLUSIVE OF HST $(to be added to Table 51 for total cost of entire project)

Addendum No. 1April 6, 2018

Table 5-3

Unit Price Deliverables

Provide unit price including all labour, materials, and equipment to comply with the requirementsof Section 2, excluding applicable taxes. The unit price shall be used for additions or deletions inproject scope.

#of AmountUnit

Item Description s Unit Cost ($) (net HST)24-hour continuous transient pressuremonitoring at each pumping station siteincluding cost of alteration, fittings, labour,data collection, and removal of equipmentupon completion of the work, for 2 weeksduration (assume 10 locations are basescope) 10 $ ea $24-hour continuous transient pressuremonitoring at each critical locations including,permits, traffic control, cost of alteration,fittings, labour, data collection, confinedspace entry and removal of equipment uponcompletion of the work, for 2 weeks duration(assume 10 locations are base scope.Cost includes traffic control in a dense

2 urban environment) 1 0 $ ea $Field inspection in pumping station andtransient protection devices including labour,and confine space (assume 10 locations

3 arebasescope) 10 $ ea $Field inspection in chambers assigned formonitoring of critical locations including,permits, traffic control, labour, and confinedspace access (assume 10 locations are

4 basescope) 10 $ ea $Paid Duty Police Officer with vehicle, per $

5 hour 20 perhour $Supervisor at site to supervise and $coordinate all site activities and to ensure

6 conformance to OHSA rules and regulations 20 per hour $Subtotal — Unit Prices $

HST(13%) $TOTAL INCLUSIVE OF HST

(to be added to Table &i for total cost of entire project) $

Addendum No. 1April 6, 2018

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