2520 Venture Oaks Way, Suite 440 \\ Sacramento, California 95833 \\ P 916-682-9494 \\ F 916-682-0990 \\ PBK.com

ADDENDUM NO. 02 February 12, 2018

To Drawings and Specifications dated January 16, 2018. Hilliard Comstock Middle School

Roof and HVAC Replacement 2750 W Steele Ln., Santa Rosa CA 95403

Santa Rosa City Schools Prepared by: PBK 2520 Venture Oaks Way, Suite 440

Sacramento, California 95833 PBK Project Nos.: 17311R A. Receipt of this Addendum shall be acknowledged on the Bid Form. B. This Addendum forms part of the Contract documents for the above referenced project and shall be incorporated

integrally therewith. C. Each bidder shall make necessary adjustments and submit this proposal with full knowledge of all modifications,

clarifications, and supplemental data included therein. Where provisions of the following supplemental data differ from those of the original Contract Documents, this Addendum shall govern.

D. Clarification: Are crickets required at drainage planes at curbs and protrusions? YES

E. Clarification: The finished slope on crickets shall be minimum ¼:12 to match roof slope.

F. Clarification: The color of prefinished sheet metal shall be determined by District from standard color palette by manufacturer. No custom colors shall be considered.

G. Clarification: Will there will be children at Summer School? IT IS POSSIBLE. While there is no summer school planned for this school, it is possible that the District may have to provide this venue for a summer program. If that becomes the case, please coordinate with onsite management and the District for your staging, lay down, storage, and Work operations. Planning and coordination with the District is imperative.

H. Clarification: Conduit, condensate drain lines, piping, and connections will need to accommodate the new roof heights.

I. Clarification: Will all pipe clamps need to be stainless steel? YES

J. Clarification: Lumber used for shims, blocking, and nailers is specified in SECTION 06 10 53 - MISCELLANEOUS ROUGH CARPENTRY.

K. Clarification: Are Rooftop Air Vents to be raised and re-used? Will all the existing roof NON-powered roof ventilators be removed and re-installed, with new curbs? ANY PROTRUSION MUST ACCOMMODATE THE MANUFACTURER’S DETAILS AND WARRANTY REQUIREMENTS. All Existing roof top equipment not identified as abandoned to be removed will need the existing curbs raised to minimum 8” above new roof elevation as required by roof manufactures warranty.

L. Clarification: Will all the existing skylights be raised up and re used or replaced? RAISED AND REPLACED. HEIGHTS MUST ACCOMMODATE ROOFING SYSTEM REQUIREMENTS FOR 20 YEAR WARRANTY. . All existing skylights in roof replacement areas only will need the existing curbs raised to minimum 8” above new roof elevation as required by roof manufactures warranty and the skylights re-installed to a watertight installation.

M. Clarification: Condensate drain lines shall be routed to nearest condensate roof drain on new engineered pipe supports

2520 Venture Oaks Way, Suite 440 \\ Sacramento, California 95833 \\ P 916-682-9494 \\ F 916-682-0990 \\ PBK.com

N. Clarification: Replace the roof hatches? NO…SEE ADDENDUM #1

Sheet GO: 1 General Notes; ADD: T. All Roof Hatches; Repair and/or Replace Damaged Latch/Handles, Hinges and Lift Assistance Tubes.

O. Clarification: Is the Mansard roof cap flashing to be replaced with Kynar coated sheet metal to best match the existing color? YES

P. Clarification: The roof edge at the top of the mansard at the flat roof is a “raised perimeter edge” detail. It is not a parapet wall and does not require the 8-inches of separation from the roof.

Q. Clarification: Will the new coping metal need to be fabricated to extend down over the existing metal roofing panels? YES

R. Clarification: Will the entire perimeter of the building need to have the framing for the roofing raised up to accommodate the new roofing as per the spec? YES

S. Clarification: Please clarify the height of the new perimeter wall and the new structural detail for framing? THIS IS A RAISED PERIMETER EDGE SO IT MAY BE AUGMENTED WITH NAILERS AND BLOCKING AS USED AT ROOF PERIMETERS.

T. Clarification: The JCI programmable thermostats will not be required to be connected to overall site building management systems as part of this project. They shall operate stand-alone. Existing conduit can be used from unit to t-stat location.

U. Clarification: Gas piping at all units will need to have dirt legs, shut off valves and stainless steel flex connections at all units being replaced.

V. Clarification: New rooftop units will need to have flue extensions installed to avoid economizer intake on adjacent unit as currently installed on middle school.

W. Clarification: The nameplates on AC #14 and AC #2 are listed as 3 phase units, not single phase units. Refer to electrical and mechanical schedules on drawings.

X. Clarification: The rooftop packaged heating units are not going to be replaced as part of this project.

Y. Clarification: All roof ventilators will be re-used once the new prefabricated curbs are installed.

Z. Clarification: A post air balance will be required once all ductwork and equipment are installed to confirm required air flow is being discharged per equipment nameplates and design.

AA. Clarification: The installing mechanical contractor is responsible to re-install existing duct smoke detectors on any new ductwork or equipment that is being replaced. All devices shall be placed in working condition and reporting to main campus fire alarm panel at completion of project.

BB. Clarification: There is not a controls allowance that will be added to this project since the scope has already been identified to install the wireless programmable thermostat and connect to new unit.

VOLUME 1 – BIDDING AND CONTRACT REQUIREMENTS: Item No 01: ADD NorBay Consulting Report. Hilliard Comstock Middle School. (Attached) Item No. 02: ADD Forensic Analytical Laboratories Bulk Asbestos Analysis. Hilliard Comstock Middle School.

(Attached) Item No. 03 Section 00 01 10.1.F NOTICE Instructions to Bidders: Revise Paragraph F NOTICE in Section 00

01 10 Instructions to Bidders to read:

NOTICE: BIDDERS SHALL BE REQUIRED TO COMPLETE THE

STATEMENT OF EXPERIENCE FORM AND REQUIRE COMPLETION OF

THE STATEMENT OF EXERIENCE FORM INCLUDED IN THE BID

PACKAGE. BIDDERS STATEMENT OF EXPERIENCE FORMS SHALL BE

SUBMITTED CONCURRENTLY WITH SUBMISSION OF BIDS IN

ACCORDANCE WITH THE NOTICE INVITING BIDS. A BIDDER WHO IS

2520 Venture Oaks Way, Suite 440 \\ Sacramento, California 95833 \\ P 916-682-9494 \\ F 916-682-0990 \\ PBK.com

NOTIFIED THAT HE/SHE/IT IS THE APPARENT LOW-BIDDER MAY BE

REQUIRED, WITHIN FORTY-EIGHT (48) HOURS OF BEING NOTIFIED BY

THE DISTRICT THAT HE/SHE/IT IS THE APPARENT LOW BIDDER,

SUBMIT THE STATEMENT OF EXPERIENCE FORM(S) FOR ALL LISTED

SUBCONTRACTORS. FAILURE TO TIMELY SUBMIT SUBCONTRACTOR

STATEMENT OF EXPERIENCE FORMS MAY RESULT IN THE REJECTION

OF THE BID.

Item No. 04 Section 00 06 00 BOND AND INSURANCE INFORMATION:

Item D – For the General Liability limit requirement of $2M each occ/$3M agg,

will PBK accept if these limits are met by a combination of the General Liability

& Excess Liability limits?

YES

Item I. – Is the GC & all subs required to obtain Crane Liability Insurance or is it

acceptable if just the crane subcontractor (& operator) carries the insurance?

CRANE SUBCONTRACTOR SHALL CARRY CRAIN LIBAILITY

INSURANCE

Item K. – Confirm that only the Prime Contractor is required to carry the Builders

Risk Coverage, provided that the Subcontractors are listed as Named Insureds on

the policy.

PRIME CONTRACTOR IS REQUIRED TO CARRY BUILDERS RISK

COVERAGE.

Section 00 06 75 – Substitution Request Form – Is it necessary for Bid

Submission? It states, if applicable. What’s our position on this…?

ONLY IF BIDDING A SUBSTITUTION VOLUME 2 - SPECIFICATIONS Item No. 01 Section 07 52 19.2.8.A – ROOFING INSULATION: Roofing system includes 3.5-inches

polyisocyanurate insulation mechanically fastened to deck + Tapered crickets with a finished slope of ¼:12 minimum + ¼-inch Dens Deck Prime. The Intent of the Design is to provide a finished roof system that establishes and maintains positive drainage at all roof locations.

MECHANICAL Item No. 01 Section 23 74 13 – Packaged, Outdoor, Central-Station Air Handling Units

1. Delete section 1.8.B. 2. Section 2.2.C. – Revise exterior gauge to 20 and 650 hours of salt spray testing. 3. Section 2.2.E.2 – Revise thickness to ½”. 4. Section 2.5.F.1 – Revise to read “Refer to schedule for dual and multi-stage compressor

requirement.

2520 Venture Oaks Way, Suite 440 \\ Sacramento, California 95833 \\ P 916-682-9494 \\ F 916-682-0990 \\ PBK.com

5. Section 2.7.B.1 – Heat exchanger material shall be aluminum in lieu of stainless steel. Thermal

efficiency shall remain same. 6. Section 2.7.E.1 – Revise to 2-stage gas control valve.

Item No. 02 Section 23 74 13.16 – Packaged, Outdoor, Central-Station Hydronic Air-Handling Units

1. Remove specification in its entirety.

Item No. 03 Section 23 81 26 – Ductless Mini-Split System Air-Conditioners

1. Add the spec section in its entirety.

DRAWINGS

Item No. 10 Sheet GO: DELETE Detail 20. Replace Detail 20 with new detail 20 New Nomenclature attached. Item No. 10 Sheet A1: Replace Sheet A1. New Sheet A1 is Attached. MECHANICAL Item No. 01 Sheet M1.0 – Mechanical Roof Plan – Comstock Middle School

1. Refer to revised sheet M1.0 for rooftop unit to be replaced.

Item No. 02 Sheet M5.0 – Mechanical Schedules – Comstock Middle School 1. Packaged, Outdoor, Central-Station Outside Air-Handling Unit Schedule

a. Add to note 14 “Part number TEC3631-00-000.” b. Add to note 17 “Provide 100% barometric relief dampers”. c. Revise all 1.5 ton rooftop unit to 2 ton unit.

2. Added rooftop unit schedule, ductless mini-split system and gas fire rooftop evaporative cooler unit schedules. Refer to sheet M2.0.

ELECTRICAL: Item No. 01 Sheet E1.0 – Electrical Plan – Comstock Middle School

1. Refer to revised sheet E1.0 for additional power notes for rooftop units. 2. Added AC-2 on Bungalow A Roof

Item No. 02 Sheet E2.0 – Electrical Plan – Comstock Middle School

1. Refer to revised sheet E2.0 for additional electrical equipment schedule changes. Item No. 03 General item. Power receptacle on rooftop equipment can be powered locally thru unit. Additional

circuit for equipment receptacle is not required. PLUMBING Item No. 01 Sheet P1.0 – Plumbing Roof Plan – Comstock Middle School

1. Refer to revised sheet SKP-01 thru SKP-04 for rooftop unit to be replaced with new gas connection. 2. Connect water line and gas line to make up air unit on Bungalow A roof area. Provide new shut

off valves for each.

End of Addendum No. 02

NorBay Consulting ________________________________________________________________________

LOGICAL ENVIRONMENTAL SOLUTIONS

(415) 507-9786 Phone 2400 Las Gallinas Avenue, Suite 110

(415) 507-9760 Fax San Rafael, California 94903

January 31, 2018

Mr. Mike Braff

Santa Rosa City Schools

211 Ridgway Avenue

Santa Rosa, CA 95401

SUBJECT: SAMPLING FOR SUSPECT ASBESTOS

CONTAINING ROOFING MATERIALS

COMSTOCK MIDDLE SCHOOL

SANTA ROSA, CALIFORNIA

Dear Mr. Braff:

NorBay Consulting is pleased to provide the analytical results from the sampling for asbestos

containing roofing materials on various buildings at Comstock Middle School.

Our inspection included the visual observation of suspect asbestos containing roofing materials,

the collection of suspect roofing materials to determine asbestos content, if any, laboratory

analysis and generation of a final report.

NorBay Consulting appreciates the opportunity to provide you with these services. If you have

any questions regarding this report or if you require additional information please do not hesitate

to contact me at (415) 507-9786.

Respectfully,

NORBAY CONSULTING

Bob Gerhold

Bob Gerhold

Certified Asbestos Consultant # 92-0157

Sampling for Suspect Asbestos

Containing Roofing Materials

Comstock Middle School

Santa Rosa, California

EXECUTIVE SUMMARY

NorBay Consulting conducted bulk sampling of suspect asbestos roofing materials on various

buildings of the Comstock Middle School campus. Since the roofs inspected are scheduled to be

removed and replaced in various phases this inspection was required as per Bay Area Air Quality

Management District (BAAQMD) and Cal-OSHA regulations. Mr. Greg Marszal, Cal-OSHA

Site Surveillance Technician #96-1975 and Mr. Bob Gerhold, Cal-OSHA Certified Asbestos

Consultant #92-0157 performed the inspection on January 29, 2018.

This Executive Summary is provided solely for the purpose of overview. Any party who

relies on this report must read the entire report. The Executive Summary may have

omitted important details, anyone of which could be crucial to the proper understanding

and risk assessment of the subject matter.

A total of thirteen (13) samples of suspect asbestos containing roofing materials were collected

during the inspection. Upon analysis by Polarized Light Microscopy (PLM) the following

materials were found to contain asbestiform minerals or are materials known to contain asbestos.

None.

A more detailed presentation of procedures and findings is presented in the body of this report.

Also included is a discussion of recommendations and regulatory considerations.

ASBESTOS SURVEY PROCEDURES

NorBay Consulting identified homogeneous areas of materials, which were suspected of

containing asbestos. A homogeneous area, for bulk sampling purposes, is one that seems by

texture, color and wear to be uniform and applied during the same general time period. After the

homogeneous areas had been identified, representative bulk sample(s) are collected for laboratory

analysis. Because asbestos-containing building materials have compositional variability, it is

possible to obtain different laboratory results for samples from the same homogeneous area.

Therefore, a homogeneous area with at least one positive sample for will result in the entire

homogeneous area being designated as an asbestos containing material.

The sampling strategy employed by NorBay Consulting was partially based on guidelines

established by the Environmental Protection Agency (EPA) for school buildings (40 CFR Part

763, AHERA) which require that samples be collected from each homogeneous area of suspected

ACM. Upon completion of the inspection and bulk sampling, the samples were delivered under

chain of custody protocol to Forensic Analytical of Hayward, California for analysis by Polarized

Light Microscopy (PLM).

SAMPLE ANALYSIS

Bulk samples were examined by Polarized Light Microscopy (PLM) in accordance with EPA

Test Method 600/R-93/116, “Method for the Determination of Asbestos in Bulk Building

Materials”. The percentage of asbestos is determined by visual estimation. Laboratory results are

reported based on the percentage of asbestiform minerals identified within each sample layer. The

lower limit of reliable detection by PLM is 1% by volume. When asbestos or other minerals are

Sampling for Suspect Asbestos

Containing Roofing Materials

Comstock Middle School

Santa Rosa, California

observed in concentrations believed to be less than the reliable detection limit (less than 1%) the

results are usually indicated as TRACE. Samples found to contain < 1% asbestos were further

analyzed by the NESHAP point counting method to verify that the material truly contained < 1%

asbestos.

Upon analysis the analytical results are compared to government agency standards. Currently,

both the California Occupational Safety and Health Administration (Cal-OSHA) and the

Environmental Protection Agency (EPA) define material with contains more than one percent

asbestos to be an asbestos containing material (ACM).

In addition, Cal-OSHA defines any manufactured construction material containing more than

0.1% by weight as asbestos containing construction materials (ACCM). Cal-OSHA also requires

notification and registration of the contractor when disturbing materials with more than one-tenth

of one percent and regulates worker protection whenever materials containing any detectable

levels of asbestos are to be disturbed.

RESULTS

Sample ID Material Location (Roofs) Results

BB-1 Black/gray sealant on HVAC

equipment near roof hatch

Building B, roof No Asbestos

Detected

BB-2 Composition rolled roofing,

Northeast

Building B, roof No Asbestos

Detected

BB-3 Composition rolled roofing with

black sealant

Building B, roof No Asbestos

Detected

BA-1 Composition rolled roofing with

silver paint, large patch, north side

Building A, roof No Asbestos

Detected

BA-2 Composition rolled roofing, center Building A, roof No Asbestos

Detected

BA-3 Composition rolled roofing with

black sealant, south end

Building A, roof No Asbestos

Detected

Drama-1 Composition rolled roofing with

gray mastic

Drama Building, roof No Asbestos

Detected

BD2-1 Composition rolled roofing with

gray mastic

Building D2, roof No Asbestos

Detected

BD2-2 Composition rolled roofing with

gray mastic and silver paint

Building D2, roof No Asbestos

Detected

BD3-1 Composition rolled roofing Building D3, roof No Asbestos

Detected

BD3-2 HVAC exhaust flashing, silver

paint/gray mastic

Building D3, roof No Asbestos

Detected

BungA-1 Sealant with silver paint on patch Bungalow A, roof No Asbestos

Detected

BungA-2 Composition rolled roofing Bungalow A, roof No Asbestos

Detected

Sampling for Suspect Asbestos

Containing Roofing Materials

Comstock Middle School

Santa Rosa, California

REGULATORY CONSIDERATIONS

Current EPA National Emissions Standards for Hazardous Air Pollutants (NESHAP) regulations

require that most ACM be removed prior to demolition or renovation activities. Other regulations

apply to construction activities and notification requirements for projects involving ACM/ACCM.

At both the federal and state levels, these include, but are not limited to Federal OSHA regulation

29 CFR 1910 and 1926, the California Health Code, California OSHA 8 CCR 1529 and

Proposition 65 which requires the posting of notifications when a facility is known to contain

toxic substances found on the governors list.

As previously mentioned in this report both the California Occupational Safety and Health

Administration (Cal-OSHA) and the Environmental Protection Agency (EPA) define material

with contains more than one percent asbestos to be an asbestos containing material (ACM). In

addition, Cal-OSHA defines any manufactured construction material containing more than 0.1%

by weight as asbestos containing construction materials (ACCM). Cal-OSHA also requires

notification and registration of the contractor when disturbing materials with more than one-tenth

of one percent and regulates worker protection whenever materials containing any detectable

levels of asbestos are to be disturbed.

RECOMMENDATIONS

Bay Area Air Quality Management District (BAAQMD) Regulation 11-2-401.3 requires that for

every demolition or renovation involving the removal of 100 square/linear feet or greater of

Regulated Asbestos Containing material (RACM), a notification must be made to the BAAQMD

at least ten working days prior to commencement of demolition/renovation activities.

In addition, BAAQMD requires removal, prior to renovation and/or demolition of regulated

asbestos-containing materials (RACM), i.e; materials with asbestos content of greater than 1%

that are friable (can be crumbled, pulverized or reduced to powder by hand pressure) or may

become friable during renovation or demolition. Non-friable asbestos containing materials

containing greater than 1% asbestos are also considered to be RACM if they are subjected to

sanding, drilling, grinding, cutting, abrading or may become friable during demolition/renovation

activities.

Analytical results indicated that no asbestos containing materials were present in the roofing

materials sampled thus there appears to be no asbestos impacts involved with

removal/replacement of these roofs.

LIMITATIONS

NorBay Consulting conducted this inspection and prepared this report for the sole and exclusive

use of Santa Rosa City Schools, the only intended beneficiary of our work. NorBay Consulting

has performed this inspection in a substantial and workmanlike manner, in accordance with

generally accepted methods and practices of the profession, and consistent with that level of care

and skill ordinarily exercised by reputable environmental consultants under similar conditions

and circumstances.

Sampling for Suspect Asbestos

Containing Roofing Materials

Comstock Middle School

Santa Rosa, California

Enclosed you will find the laboratory reports and chain of custody form for all asbestos bulk

samples collected. If you have any questions regarding this report or if you require additional

information please do not hesitate to contact me at (415) 507-9786.

Sincerely,

NORBAY CONSULTING

Bob Gerhold

Bob Gerhold

Certified Asbestos Consultant #92-0157

Sampling for Suspect Asbestos

Containing Roofing Materials

Comstock Middle School

Santa Rosa, California

LABORATORY REPORTS AND

CHAIN OF CUSTODY FORMS

POLARIZED LIGHT MICROSCOPY (PLM)

Final Report

(EPA Method 600/M4-82-020 and 600/R-93-116, Visual Area Estimation)

Bulk Asbestos Analysis3982Client ID:NorBay ConsultingB252999Report Number:Robert Gerhold

Date Received:2400 Las Gallinas01/31/18Date Analyzed:Suite 11001/31/18Date Printed:San Rafael, CA 94903

First Reported:

39826678 - Comstock Middle School, 2750 W. Steele Lane, Santa Rosa, California FALI Job ID:Job ID/Site:

Date(s) Collected: 01/29/201813Total Samples Submitted:

Total Samples Analyzed: 13

01/30/18

01/31/18

Sample ID Lab NumberAsbestos

TypePercent in

LayerAsbestos AsbestosPercent in Percent in

Type TypeLayer Layer

BB-1 11988448Layer: Silver Paint NDLayer: Black Mastic ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (7 %)

BB-2 11988449Layer: Silver Paint NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Tan Fibrous Material ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (5 %) Synthetic (25 %) Comment: Bulk complex sample.

BB-3 11988450Layer: Black Tar NDLayer: Silver Paint NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Tan Fibrous Material ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (5 %) Synthetic (25 %) Comment: Bulk complex sample.

1 of 53777 Depot Road, Suite 409, Hayward, CA 94545 / Telephone: (510) 887-8828 (800) 827-FASI / Fax: (510) 887-4218

Report Number: B252999Date Printed: 01/31/18Client Name: NorBay Consulting

Sample ID Lab NumberAsbestos

TypePercent in

LayerAsbestos AsbestosPercent in Percent in

Type TypeLayer Layer

BA-1 11988451Layer: Silver Paint NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (Trace) Fibrous Glass (15 %) Synthetic (15 %) Comment: Bulk complex sample.

BA-2 11988452Layer: Silver Paint NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Tan Fibrous Material ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (5 %) Fibrous Glass (15 %) Synthetic (15 %) Comment: Bulk complex sample.

BA-3 11988453Layer: Silver Paint NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Tan Fibrous Material ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (5 %) Fibrous Glass (15 %) Synthetic (15 %) Comment: Bulk complex sample.

2 of 53777 Depot Road, Suite 409, Hayward, CA 94545 / Telephone: (510) 887-8828 (800) 827-FASI / Fax: (510) 887-4218

Report Number: B252999Date Printed: 01/31/18Client Name: NorBay Consulting

Sample ID Lab NumberAsbestos

TypePercent in

LayerAsbestos AsbestosPercent in Percent in

Type TypeLayer Layer

DRAMA-1 11988454Layer: Stones NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (20 %) Fibrous Glass (15 %) Comment: Bulk complex sample.

BD2-1 11988455Layer: Black Tar NDLayer: Silver Paint NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Tan Fibrous Material ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (15 %) Fibrous Glass (15 %) Synthetic (10 %) Comment: Bulk complex sample.

BD2-2 11988456Layer: Silver Paint NDLayer: Stones NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (2 %) Fibrous Glass (25 %) Comment: Bulk complex sample.

3 of 53777 Depot Road, Suite 409, Hayward, CA 94545 / Telephone: (510) 887-8828 (800) 827-FASI / Fax: (510) 887-4218

Report Number: B252999Date Printed: 01/31/18Client Name: NorBay Consulting

Sample ID Lab NumberAsbestos

TypePercent in

LayerAsbestos AsbestosPercent in Percent in

Type TypeLayer Layer

BD3-1 11988457Layer: Silver Paint NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Tan Fibrous Material ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (5 %) Fibrous Glass (10 %) Synthetic (15 %) Comment: Bulk complex sample.

BD3-2 11988458Layer: Silver Paint NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (5 %) Fibrous Glass (10 %) Synthetic (15 %) Comment: Bulk complex sample.

BungA-1 11988459Layer: Silver Paint NDLayer: Black Semi-Fibrous Tar ND

Asbestos (ND)Total Composite Values of Fibrous Components:Fibrous Glass (15 %)

BungA-2 11988460Layer: Silver Paint NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt NDLayer: Black Tar NDLayer: Black Felt ND

Asbestos (ND)Total Composite Values of Fibrous Components:Cellulose (5 %) Fibrous Glass (10 %) Synthetic (15 %) Comment: Bulk complex sample.

4 of 53777 Depot Road, Suite 409, Hayward, CA 94545 / Telephone: (510) 887-8828 (800) 827-FASI / Fax: (510) 887-4218

Report Number: B252999Date Printed: 01/31/18Client Name: NorBay Consulting

Sample ID Lab NumberAsbestos

TypePercent in

LayerAsbestos AsbestosPercent in Percent in

Type TypeLayer Layer

Analytical results and reports are generated by Forensic Analytical Laboratories Inc. (FALI) at the request of and for the exclusive use of the person or entity (client) named on suchreport. Results, reports or copies of same will not be released by FALI to any third party without prior written request from client. This report applies only to the sample(s) tested.Supporting laboratory documentation is available upon request. This report must not be reproduced except in full, unless approved by FALI. The client is solely responsible for theuse and interpretation of test results and reports requested from FALI. Forensic Analytical Laboratories Inc. is not able to assess the degree of hazard resulting from materialsanalyzed. FALI reserves the right to dispose of all samples after a period of thirty (30) days, according to all state and federal guidelines, unless otherwise specified. All samples werereceived in acceptable condition unless otherwise noted.

Note: Limit of Quantification ('LOQ') = 1%. 'Trace' denotes the presence of asbestos below the LOQ. 'ND' = 'None Detected'.Tad Thrower, Laboratory Supervisor, Hayward Laboratory

5 of 53777 Depot Road, Suite 409, Hayward, CA 94545 / Telephone: (510) 887-8828 (800) 827-FASI / Fax: (510) 887-4218

PBKCONTACT: BRIAN HOOD

11 GREENWAY PLAZA, 22ND FLOOR HOUSTON, TX 77046

t: 713-965-0608f: 713-961-4571

No. Description Date

2

2

SKA-01

GO

DETAIL 20 ON SHEET GO

02/12/18

PBK Comstock Middle School – Roof and HVAC Replacement Project No. 17311 Santa Rosa City Schools

DUCTLESS MINI-SPLIT-SYSTEM AIR-CONDITIONERS 23 81 26 - 1

SECTION 23 81 26 - DUCTLESS MINI-SPLIT-SYSTEM AIR-CONDITIONERS CONDITIONS OF THE CONTRACT AND DIVISION 1, as applicable, apply to this Section. PART I -GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 GENERAL REQUIREMENTS

A. Indoor, wall or ceiling mounted, direct-expansion fan coils are matched with cooling only outdoor unit.

B. Outdoor air-cooled split system compressor sections suitable for on-the-ground, rooftop,

wall hung or balcony mounting. Units shall consist of a rotary compressor, an air-cooled coil, propeller-type draw-through outdoor fan, metering device(s), and control box. Units shall discharge air horizontally as shown on the contract drawings. Units shall function as the outdoor component of an air-to-air cooling only or heat pump system (refer to schedule).

C. Indoor unit shall be rated per ARI Standards 210/240 and listed in the ARI directory as a

matched system.

D. A factory provided and installed BACnet communication interface card with building automation system shall enable building automation system operator to remotely control and monitor the system from an operator workstation. Control features available, and monitoring points displayed, locally at fan coil controller shall be available through building automation system.

E. Outdoor unit construction shall comply with ANSI/ASHRAE 15, latest revision, and with

the NEC. Units shall be evaluated in accordance with UL standard 1995. Units shall be listed in the CEC directory. Unit cabinet shall be capable of withstanding 500-hour salt spray test per Federal Test Standard No. 141 (method 6061). Air-cooled condenser coils shall be leak tested at 573 psig.

F. Provide equipment with electrical characteristics as shown on the Electrical Drawings.

1.3 MANUFACTURERS

A. Acceptable Manufacturers: Subject to compliance with plans and specification, provide one of the following:

1. Trane

2. Carrier

1.4 SUBMITTAL:

A. Submit in form similar to the schedule on the Drawings. Show all data listed in schedule, electrical characteristics and accessories being provided.

PBK Comstock Middle School – Roof and HVAC Replacement Project No. 17311 Santa Rosa City Schools

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B. Provide line-by-line specification review annotated to certify compliance or deviation. C. General: Submit listed submittals in accordance with Conditions of the Contract and

Division 1 Submittal Procedures. D. Product Data: Submit product data, including manufacturer’s product sheet for specified

products. 1.5 WARRANTY

A. One (1) year on unit parts other than compressor/motor assembly. Warranty shall begin from date of Certificate of Substantial Completion.

B. Five (5) years on compressor/motor assembly. Warranty shall begin from date of Certificate of Substantial Completion.

C. One (1) year on refrigerant and oil. Warranty shall begin from date of Certificate of

Substantial Completion. PART 2 –PRODUCTS 2.1 UNIT CABINET:

A. Indoor unit cabinet discharge and inlet grilles shall be attractively styled, high-impact polystyrene. Cabinet shall be fully insulated for improved thermal and acoustic performance.

B. Outdoor unit cabinet shall be constructed of galvanized steel, bonderized and coated with

a baked-enamel finish on inside and outside. Unit access panels shall be removable with minimal screws and shall provide full access to the compressor, fan, and control components. Outdoor compartment shall be isolated and have an acoustic lining to assure quiet operation.

C. Indoor and outdoor unit shall be of the same manufacturer.

2.2 COMPRESSOR A. Compressor shall be fully hermetic rotary type. Compressor shall be equipped with oil

system, operating oil charge, and motor. Internal overloads shall protect the compressor from over-temperature and over-current. Motor shall be NEMA rated class F, suitable for operation in a refrigerant atmosphere. Compressor assembly shall be installed on rubber vibration isolators.

2.3 COIL

A. Evaporator coil shall be copper tube with aluminum fins and galvanized steel tube sheets. Fins shall be bonded to the tubes by mechanical expansion. A drip pan under the coil shall have a drain connection for hose attachment to remove condensate. Condensate pan shall have internal trap.

B. Condenser coil shall be constructed of aluminum fins mechanically bonded to seamless copper tubes, which are cleaned, dehydrated, and sealed.

PBK Comstock Middle School – Roof and HVAC Replacement Project No. 17311 Santa Rosa City Schools

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2.4 FANS

A. Fan shall be tangential direct-drive blower type with air intake at the top of the unit and discharge at the bottom front. Automatic, motor-driven vertical air sweep shall be provided standard. Air sweep operation shall be user selectable. The vertical sweep may be adjusted (using the remote control) and the horizontal air direction may be set manually.

2.5 AIR FILTERS

A. Unit shall have filter track with factory-supplied cleanable filters. 2.6 BUILDING AUTOMATION SYSTEM INTERFACE:

A. Controls shall consist of a microprocessor-based control system which shall control space temperature, determine optimum fan speed, and run self-diagnostics. The temperature control range shall be from 62° F to 84°F.

B. The unit shall have integral controls provided by unit manufacturer to perform input

functions necessary to operate the system. Factory installed hardware and software to enable building automation system to monitor, control, and display status and alarms. 3. A factory provided and installed BACnet communication interface card with

building automation system shall enable building automation system operator to remotely control and monitor the system from an operator workstation. Control features available, and monitoring points displayed, locally at fan coil controller shall be available through building automation system.

4. The unit shall be compatible with interfacing with connection to BACnet networks

or interfacing with connection to BMS system.

C. The unit shall have the following functions as a minimum:

1. An automatic restart after power failure at the same operating conditions as at failure.

2. A timer function to provide a minimum 24-hour timer cycle for system Auto Start/Stop.

3. Temperature-sensing controls shall sense return air temperature.

4. Indoor coil freeze protection.

5. Wireless infrared remote control to enter set points and operating conditions.

6. Automatic air sweep control to provide on or off activation of air sweep louvers.

7. Dehumidification mode shall provide increased latent removal capability by modulating system operation and set point temperature.

8. Fan-only operation to provide room air circulation when no cooling is required.

PBK Comstock Middle School – Roof and HVAC Replacement Project No. 17311 Santa Rosa City Schools

DUCTLESS MINI-SPLIT-SYSTEM AIR-CONDITIONERS 23 81 26 - 4

9. Diagnostics shall provide continuous checks of unit operation and warn of possible malfunctions. Error messages shall be displayed at the unit.

10. Fan speed control shall be user-selectable: high, medium, low, or microprocessor controlled automatic operation during all operating modes.

11. Automatic heating-to-cooling changeover in heat pump mode. Control shall include dead band to prevent rapid mode cycling between heating and cooling.

12. Indoor coil high temperature protection shall be provided to detect excessive indoor discharge temperature when unit is in heat pump mode.

PART 3 -EXECUTION 3.1 FIELD QUALITY CONTROL

B. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect field-assembled components and equipment installation, including piping and electrical connections. Report results in writing.

1. Leak Test: After installation, fill water coils with water and test coils and

connections for leaks. Repair leaks and retest until no leaks exist.

2. Charge refrigerant coils with refrigerant and test for leaks. Repair leaks and retest until no leaks exist.

3. Fan Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation. Remove malfunctioning units, replace with new units, and retest.

3.2 STARTUP SERVICE

A. Refer to Section 23 05 93 Testing, Adjusting, and Balancing for HVAC. 3.3 CLEANING

A. Clean units internally, on completion of installation, according to manufacturer's written instructions. Clean fan interiors to remove foreign material and construction dirt and dust. Vacuum clean fan wheels, cabinets, and coils entering air face.

B. After completing system installation and testing, adjusting, and balancing fan coil and air-

distribution systems clean filter housings and install new filters. 3.4 DEMONSTRATION

A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain fan coil units.

END OF SECTION 23 81 26

PLAN

NORTH

KEY PLAN

CHECKED BY:

REVISIONS

DRAWN BY:

DATE:

PROJECT NUMBER

CLIENT

ARCHITECTURE

SACRAMENTO

2520 VENTURE OAKS DR, SUITE 440

SACRAMENTO, CA 95833

t: 916-682-9494

PBK.com

MEPT

PBKCONTACT: BRIAN HOOD

11 GREENWAY PLAZA, 22ND FLOOR HOUSTON, TX 77046

t: 713-965-0608f: 713-961-4571

NO. C-17626

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PLAN

NORTH

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CHECKED BY:

REVISIONS

DRAWN BY:

DATE:

PROJECT NUMBER

CLIENT

ARCHITECTURE

SACRAMENTO

2520 VENTURE OAKS DR, SUITE 440

SACRAMENTO, CA 95833

t: 916-682-9494

PBK.com

MEPT

PBKCONTACT: BRIAN HOOD

11 GREENWAY PLAZA, 22ND FLOOR HOUSTON, TX 77046

t: 713-965-0608f: 713-961-4571

NO. C-17626

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ISSUE FOR BID

No. Description Date

2ADDENDUM NO. 2

2/9/18

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