Addendum 2.pdf

5-SITE MECHANICAL REPAIRS & CONTROLS REPLACEMENT

PROJECT NO.: 22518-01

MAY 16, 2022

ADDENDUM NO. TWO (2)

PAGE 1 OF 3 (PLUS ATTACHMENTS)

THE FOLLOWING CHANGES, ADDITIONS, AND DELETIONS TO THE CONTRACT

DOCUMENTS DATED APRIL 27, 2022 HEREBY BECOME A PART OF THE CONTRACT

DOCUMENTS.

NOTIFY ALL SUBCONTRACTORS AFFECTED BY THIS ADDENDUM.

BID DUE: Wednesday, May 25, 2022 at 2:00 PM

GENERAL INFORMATION

1. The bid bond is 5%, as noted in Section 00 21 00 Instructions to Bidders Section C.1. The bid form states the bid bond is 10% and that is incorrect.

2. Pre-Bid Attendees (non-mandatory):

a. Scott Rose, R&C Management Group

b. Dwight Gray, EEI

c. Joe Barnes, NW Control Company

d. Jesse Taylor, NW Control Company

e. Graeson Neddow, Delta Connects

3. The attached pre-bid conference agenda was discussed.

4. Other contracted work will be occurring at all sites in respect to lighting replacement, fire alarms, security, intercom, seismic work, etc. This contractor will be expected to work in the same spaces and make reasonable accommodations for other trades, though those contracts will be managed by R&C Management Group.

5. The awarded Contractor will be given drawings that exclude the “NOT FOR CONSTRUCTION” title block, to submit for permit.

6. The successful contractor will need to provide Niagra licensing for the (5) sites included in this scope of work (Centennial Middle School, Butler Creek Elementary School, Pleasant Valley Elementary School, Harold Oliver Elementary School, and Centennial High School).

7. All control valves are to be changed out on equipment identified for control integration to the new DDC system. Existing system design is not necessarily available, so match the existing valves to the new replacements where possible. Based on documentation identified in the existing valve installations, the valves should be sized assuming a 2 lb. per hour of steam input delivery on steam systems. Heating water systems valve Cv sizing will need to be determined based on assumed GPM and pressure drop of the equipment being controlled where specific equipment information is not available.

MAY 16, 2022

ADDENDUM NO. TWO (2)

PAGE 2 OF 3 (PLUS ATTACHMENTS)

8. A clarification was requested as to the intent of the mix of control systems: The overall goal of this work scope is to provide a seamless network, viewable and with minimal operational changes to be made through the two (2) B-OWS being provided under a different contract. Some of the schools have rooftop and other equipment that is currently being controlled by Alerton control system.

These units will continue to operate as they are without changes to the systems and/or programming at this point. The scope of this work is to provide BacNet read/write points from those systems into the new DDC system network.

9. Pleasant Valley Elementary School is to receive 5 new rooftop units. The district has a roofing contractor who will be replacing the roof on the area of the school where these rooftop units are to be located. The successful contractor will provide the roof curb to the roofing contractor for installation under the existing district roofing contract and then mount the unit to the installed (by the roofing contractor) roof curb once the roofing work is complete. No roofing work for installation of these rooftop units will be required by the successful contractor under this contract.

10. Pleasant Valley Elementary School includes a number of exhaust fans which are not running. The district has procured the replacement motors for these units and will supply them to the successful contractor for installation. If an issue is discovered (the wrong part, factory defect, etc.) of the owner provided equipment, that will be dealt with on a case-by-case basis as necessary. The contractor will need to alert the district and engineer upon discovery of any such issue.

11. Pleasant Valley Elementary School on sheet M2.03 includes a diamond note 2 which indicates that the outside air openings for the existing unit ventilators is to be blocked off. The note has been changed to indicated that this blocking of the outside air opening will be done by the district and is not in the scope of this contract.

SPECIFICATIONS

1. Section 23 09 00 Controls specifications includes requirements for (2) B-OWS and software.

These workstations and software were provided under an earlier contract and therefore this requirement is deleted from this contract scope of work. The successful contractor WILL however be required to integrate their control system into these now existing workstations.

2. In section 23 05 93 of the specifications, “TESTING, ADJUSTING, AND BALANCING FOR HVAC” the following changes have been made to scope requirements:

• An initial baseline reading of all air handlers and rooftop units at the schools is to be provided to the engineer for evaluation prior to modifications being made to the system.

• An initial evaluation was completed on some of the school’s equipment. These units will not need to be included in the baseline evaluation. This baseline report is attached as part of this addendum.

MAY 16, 2022

ADDENDUM NO. TWO (2)

PAGE 3 OF 3 (PLUS ATTACHMENTS)

DRAWINGS

1. The following drawings for Centennial HS have been revised and are attached:

a. M0.06

b. M2.08

c. M2.09

d. M2.10

2. The following drawings for Pleasant Valley ES have added and are attached:

a. M3.02 – Controls Sequence of Operations

b. S1 – Structural Plan

c. S2 – Structural Calcs

3. The following drawings for Centennial MS have been added and are attached:

a. M3.02 – Controls Sequence of Operations

4. The following drawings for Oliver ES have been added and are attached:

a. M3.02 – Controls Sequence of Operations

END OF ADDENDUM TWO (2)

NON-MANDATORY PRE-BID MEETING AGENDA

ITEM # DESCRIPTION

1.0 Mandatory COVID Precautions applicable: As of the date of the pre-bid, the district requires that all on site contractor personnel be fully vaccinated. Masks are optional.

2.0 Team Introductions

2.1 Scott Rose, Owner’s Representative, 503-312-5404, scott@randcmanagement.com

2.2 Dwight Gray, lead engineer, 503-329-3314, dwight.gray@eeiengineers.com

3.0 Mandatory Pre-Bid meeting - Record of Attendance

3.1 Included in body of addenda.

4.0 Future Site Visit:

4.1 Contact Scott Rose (503) 312- 5404, Scott@randcmanagement.com to schedule future site visits.

5.0 Request for Bids / Bid Dates

5.1 Bids Due 2:00PM May 18, 2022 (note addendum #1 extended this to May 25, 2022)

5.1.1 Sealed bids will be received by Centennial School District in the District Office, 18135

SE Brooklyn St. Portland, OR 97236. Bid #22518-01

5.1.2 Do NOT condition the bid with any exclusions or clarifications. This can make the bid considered non-responsive.

5.2 Substitution Requests

5.2.1 Send to Scott Rose, scott@randcmanagement.com

5.2.2 Submit any substitution requests 7 days prior to bid date end of day, per Instructions to

Bidders.

5.2.3 See specification section 00 20 00 – Instructions to Bidders for substitution requirements/procedures.

5.3 Any Questions / RFI’s

5.3.1 Send to Scott Rose, scott@randcmanagement.com

5.3.2 Submit any questions/RFI requests 7 days prior to bid date end of day, per Instructions to

Bidders.

CENTENNIAL SCHOOL DISTRICT

Project #22518-01 5-Site Mechanical Repairs & Controls Replacement Pre-Bid Meeting

Date of Meeting: May 5 @ 3:00 PM Location of Meeting:

Centennial High School 3505 SE 182nd Avenue

Gresham, OR 97030 mailto:scott@randcmanagement.com mailto:dwight.gray@eeiengineers.com

5.3.3 Final Addendum, if needed, expected to be issued end of day May 18, 2022.

6.0 Construction Schedule (See Spec 01 11 00 – 1.3 Work Sequence) The General Contractor shall include the following anticipated date constraints for the Work.

1. School Board Approval of the Agreement June 8, 2022

2. Anticipated issuance of the Notice to Proceed June 9, 2022

3. Site available for Contractor mobilization June 9, 2022

4. Date of Substantial Completion: October 31,2022

7.0 Bid Form Section 00 41 00

7.1 Base Bid Complete Project Expected bid of $2,600,000.

7.2 Bid Bond requirements – see instruction to bidders.

7.3 Performance / Payment bonds provided with signed contract – see instruction to bidders.

7.4 Sub Disclosure – ORS 279C.370 Identification of Subcontractors o See Spec 00 41 13 First-Tier Subcontractor Disclosure

8.0 Agreement / General Conditions

8.1 Available in bid documents

9.0 Prevailing Wage

9.1 Must comply with State of Oregon prevailing wage requirements.

9.1.1 See 00 20 00 Instructions to Bidders.

10.0 Jobsite / Site Logistics

10.1 Work hours-comply with city regulations.

10.1.1 When school is “in session”, work may not start till 4pm and must be concluded by 7am.

Outside of “school days” hours are unlimited, provided city regulations are met.

10.2 Site laydown areas within the limits of the site are allowed in a locked room during the summer but must remain off site or in a coordinated contractor-provided “conex”.

10.3 All site personnel must go through a background check and get badged. Keys, fobs, and access codes will be provided after this process.

11.0 Permits/Fees

11.1 The Contractor shall secure and pay all governmental permits, fees, licenses and inspections.

12.0 Summary of Work

12.1 Scope of work – Dwight with EEI to go over scope.

13.0 Questions

14.0 Site Walk

IN BUSINESS SINCE 1964 CERTIFIED NEBB FIRM - CERTIFICATION NO. 2984

PHONE (503) 230-2332 FAX (503) 230-2820

AIR BALANCING SPECIALTY INC.

CENTENNIAL SCHOOL DISTRICT

VARIOUS SCHOOLS

PORTLAND / GRESHAM, OREGON

PROJECT NO: 21-4261-D

AIR BALANCING SPECIALTY INC. 3532 S.E. MILWAUKIE AVENUE PORTLAND, OREGON 97202-2751

PROJECT NAME: CENTENNIAL SCHOOL DISTRICT - VARIOUS SCHOOLS - PORTLAND / GRESHAM, OREGON

FOR: GLUMAC DATE STARTED: 03/29/21 DATE FINISHED: 03/29/21

900 SW 5th AVE. SUITE 1600

PORTLAND, OR. 97204

MECHANICAL ENGINEER: WORK PERFORMED BY: DALE NEFFENDORF

GENERAL CONTRACTOR: CERTIFIED BY:

DATE:

MECHANICAL CONTRACTOR:

SHEET METAL CONTRACTOR:

CONTROL CONTRACTOR:

IN BUSINESS SINCE 1964 AIR BALANCING SPECIALTY INC. CERTIFIED NEBB No. 2984

CERTIFIED TEST AND BALANCE REPORT PROJECT NO.: 21-4261-D

3532 SE Milwaukie Avenue Portland, Oregon 97202-2751 Phone (503) 230-2332 Fax (503) 230-2820

DALE W. NEFFENDORF

CERTIFICATION

Exp. 3/31/22

INSTRUMENT MODEL NO. SERIAL NO. RANGE CALIBRATION DATE

AIR

(D) Shortridge Airdata Multimeter ADM860 M98375 0.0001 to 60.00" WC. 1/12/2021

ADM Accessories

(DH) Datameter Flow Hood 8400 25 - 2500 CFM

(DP) Datameter Pitot Tube 12", 18", 24", 36", 48" & 60" 50 - 30000 FPM

(DA) Datameter Airfoil AFP18 50 - 5000 FPM

(DG) Datameter Velgrid VLG84 50 - 2500 FPM

Rotating Vane Anemometer A4/-4" 83072B 200 - 10000 FPM 1/14/2021

Amprobe Ammeter Fluke 335 99330394 0 - 750 Volts / 0 - 300 Amps 1/8/2021

Shimpo Tachometer DT-207L D26B0033 6 - 30,000 RPM 1/12/2021

Hydrodata Meter HDM-250 W01025 DP -10 to +300 PSI 1/12/2021

IN BUSINESS SINCE 1964 AIR BALANCING SPECIALTY INC. CERTIFIED NEBB No. 2984

EQUIPMENT USED IN BALANCING

PROJECT: CENTENNIAL SCHOOL DISTRICT - VARIOUS SCHOOLS - PORTLAND / GRESHAM, OREGON PROJECT NO.: 21-4261-D

3532 SE Milwaukie Avenue Portland, Oregon 97202-2751 Phone (503) 230-2332 Fax (503) 230-2820

WATER

AREA SERVED OUTLET DESIGN CUBIC

Ref Ins Rm.# No. Size Blow AK Vel CFM FEET FPM CFM ACH PRESSURE FPM CFM ACH PRESSURE

MZU-8 WITH PNEUMATIC CONTROL VALVE SET FOR 100% OSA, RA DAMPER @ 70% CLOSED, OSA @ APPROX. 30% OPEN.

DG Gyms & Lockers 130x45 40.62 389 15801

MZU-9 WITH PNEUMATIC CONTROL VALVE SET FOR 100% OSA, RA DAMPER @ 90% CLOSED, OSA @ ? (NOT VISABLE) DG Classrooms 106x40 29.44 407 11982

Unit 10 PULLED PINS ON ACTUATORS TO GET TO 100% OSA DG Multi-Purpose 60x52 21.66 137 2967

Unit 13

DG Office Library 60x36 15.00 228 3420

CONSTANT VOLUME - FPM AIR BALANCE DATA SHEET PROJECT NO.: 21-4261-D

PROJECT: CENTENNIAL SCHOOL DISTRICT - HAROLD OLIVER ELEMENTARY SCHOOL - PORTLAND, OREGON DATE START: 03/29/21 FINISH: 03/29/21

SYSTEM: MZU-8, MZU-9, Unit 10 & Unit 13 SECTION: BY: DN PAGE: 1 OF 1

AIR BALANCING SPECIALTY, INC. 3532 SE Milwaukie Avenue, Portland, Oregon 97202-2751 Phone: (503) 230-2332 Fax: (503) 230-2820

TEST #1 TEST #2

MZU-1 OSA VALVE SET TO 100% OSA, OSA IS CLOSED, 100% RA

DG Gym 130x45 40.62 347 14095

MZU-2 100% OSA

DG 106x40 29.44 310 9126

HVU-9 MANUALLY SET TO 100% OSA

DG Admin Offices 34x13 3.07 845 2594

AHU-1 MANUALLY SET TO 100% OSA (FAN DISCHARGE PRESSURE 1.56" INDICATES DOWN STREAM BLOCKAGE) DG Cafeteria / Commons 70X57 16.63 12 200

OSA Louver

CONSTANT VOLUME - FPM AIR BALANCE DATA SHEET PROJECT NO.: 21-4261-D

PROJECT: CENTENNIAL SCHOOL DISTRICT - CENTENNIAL MIDDLE SCHOOL - PORTLAND, OREGON DATE START: 03/29/21 FINISH: 03/29/21

SYSTEM: MZU-1, MZU-2, HVU-9 & AHU-1 SECTION: BY: DN PAGE: 1 OF 1

AIR BALANCING SPECIALTY, INC. 3532 SE Milwaukie Avenue, Portland, Oregon 97202-2751 Phone: (503) 230-2332 Fax: (503) 230-2820

@ 80% DA Classroom C102 27x9 1.35 9989 660 891 5.35

@ 80% DA Classroom C130 55x5.5 1.68 8995 407 684 4.56

DG Cafeteria (Fan Total) 100x60 41.66 146 6082

DG Music Room (4) 30x8 SW 1.17 16224 900 1053 3.89

CONSTANT VOLUME - FPM AIR BALANCE DATA SHEET PROJECT NO.: 21-4261-D

PROJECT: CENTENNIAL SCHOOL DISTRICT - CENTENNIAL HIGH SCHOOL - GRESHAM, OREGON DATE START: 03/29/21 FINISH: 03/29/21

SYSTEM: Classroom C102, Classroom C130, Cafeteria & Music Room SECTION: BY: DN PAGE: 1 OF 1

AIR BALANCING SPECIALTY, INC. 3532 SE Milwaukie Avenue, Portland, Oregon 97202-2751 Phone: (503) 230-2332 Fax: (503) 230-2820

DH Classroom 201 2W 1.00 8299 1400 10.12

DH Classroom 308 2W 1.00 8140 1320 9.73

DH Classroom 404 2W 1.00 8323 UNIT NOT RUNNING

CONSTANT VOLUME - FPM AIR BALANCE DATA SHEET PROJECT NO.: 21-4261-D

PROJECT: CENTENNIAL SCHOOL DISTRICT - BUTLER CREEK ELEMENTARY SCHOOL - GRESHAM, OREGON DATE START: 03/29/21 FINISH: 03/29/21

SYSTEM: Classroom 201, Classroom 308 & Classroom 404 SECTION: BY: DN PAGE: 1 OF 1

AIR BALANCING SPECIALTY, INC. 3532 SE Milwaukie Avenue, Portland, Oregon 97202-2751 Phone: (503) 230-2332 Fax: (503) 230-2820

DH Classroom 30 (4) 4W 1.00 8848 355 2.41 @ 25% (279)

@ 60% R Music UV 17 4'x6" 1.20 7950 520 624 4.71

DH Classroom 10 (4) 4W 1.00 9463 1080 6.85

CONSTANT VOLUME - FPM AIR BALANCE DATA SHEET PROJECT NO.: 21-4261-D

PROJECT: CENTENNIAL SCHOOL DISTRICT - PLEASANT VALLEY ELEMENTARY SCHOOL - GRESHAM, OREGON DATE START: 03/29/21 FINISH: 03/29/21

SYSTEM: Classroom 30, Music UV, Classroom 10 SECTION: BY: DN PAGE: 1 OF 1

AIR BALANCING SPECIALTY, INC. 3532 SE Milwaukie Avenue, Portland, Oregon 97202-2751 Phone: (503) 230-2332 Fax: (503) 230-2820