20-102338-Watershop Roof HazMat Survey-02-21-2020-V1
Post Office Box 1446 • Auburn, Washington 98071-1446 • PHONE (253) 351-0677 • FAX (253) 351-0688 • E-mail: richek@medtoxnw.com
Website: www.medtoxnw.com
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February 21, 2020
Mr. Erik Prestegaard
Helix Design Group, Inc.
6021 12th Street East, Suite 201
Tacoma, Washington 98424
Subject: “Good Faith” Asbestos Roof Survey
31531 1st Avenue South, Federal, Washington
Med-Tox Northwest Project No. A-8792.3
Dear Prestegaard,
Med-Tox Northwest (MTNW) performed an “Good Faith” asbestos roof survey of the
Watershed building (B3) located at 31531 1st Avenue South, Federal Way, Washington. The
survey was performed by Jason Carlson on January 28, 2020; a copy of his Asbestos Hazard
Emergency Response Act (AHERA) building inspector certification is attached.
The purpose of the assessment was to assist Helix Design Group Inc, with communicating the
presence, location and quantity of asbestos–containing materials to employees and
contractors working in the Project Area and to meet the requirements for an asbestos survey
for the Puget Sound Clean Air Agency (PSCAA) and a good faith inspection as required by
Washington State Department of Labor and Industries’ Division of Occupational Safety and
Health (DOSH) regulations prior to renovation.
As required by Washington Administrative Code (WAC) 296-62-077 and PSCAA Regulation III,
Article 4, an Asbestos Hazard Emergency Response Act (AHERA) accredited building
inspecter performed the survey. A copy of the building inspector certificate is attached to this
letter report.
ASBESTOS SURVEY
The roof consisted of metal panels with fiberglass batt insulation, multiple sealants, caulking,
and mastics.
Helix Design Group, INC.
Med-Tox Northwest Project No. A-8792.3
February 7, 2020
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Building materials potentially impacted by the renovation are included in Table 1 below:
Table 1. Summary of Materials Sampled for Asbestos
Sample Material Location AHERA
Type
HM Result
8792.3-WSB-
01
Yellow fiberglass
batt insulation,
paper,
yellow/brown
mastic
Under metal
roofing
TSI 01 ND
8792.3- WSB-
02
Yellow fiberglass
batt insulation,
paper,
yellow/brown
mastic
Under metal
roofing
TSI 01 ND
8792.3- WSB-
03
Yellow fiberglass
batt insulation,
paper,
yellow/brown
mastic
Under metal
roofing
TSI 01 ND
8792.3- WSB-
04
Yellow fiberglass
batt insulation
paper and mastic
Under metal
roofing
TSI 02 ND
8792.3- WSB-
05
Yellow fiberglass
batt insulation
paper and mastic
Under metal
roofing
TSI 02 ND
8792.3- WSB-
06
Yellow fiberglass
batt insulation
paper and mastic
Under metal
roofing
TSI 02 ND
8792.3- WSB-
07
White and gray
sealant
Patch areas
throughout roof
Misc. 03 ND
8792.3- WSB-
08
White and gray
sealant
Patch areas
throughout roof
Misc. 03 ND
8792.3- WSB-
09
White sealant Around hatch Misc. 04 ND
8792.3- WSB-
010
White sealant Around hatch Misc. 04 ND
8792.3- WSB-
011
Black tar Patch areas
throughout roof
Misc. 05 ND
8792.3- WSB-
012
Black tar Patch areas
throughout roof
Misc. 05 ND
8792.3- WSB-
013
Gray sealant Around exhaust
vents
Misc. 06 ND
Helix Design Group, INC.
Med-Tox Northwest Project No. A-8792.3
February 7, 2020
S:\MTNW\ALLJOBS\8000 - 8999\8792\8792.3\REPORT\Watershed Building Roof\021120-LR_8792.3 Final.doc
Sample Material Location AHERA
Type
HM Result
8792.3- WSB-
014
Gray sealant Around exhaust
vents
Misc. 06 ND
8792.3- WSB-
015
Black gasket Around screws on
roof
Misc. 07 ND
8792.3- WSB-
016
Black gasket Around screws on
roof
Misc. 07 ND
8792.3- WSB-
017
Black mastic on
paper
Underneath metal
along perimeter of
roof
Misc. 08 ND
8792.3- WSB-
018
Black mastic on
paper
Underneath metal
along perimeter of
roof
Misc. 08 ND
TSI = thermal system insulation, Misc. = miscellaneous, HM = homogeneous (same look, feel, etc.), ND = none detected
Bulk samples were analyzed by Polarized Light Microscopy (PLM) dispersion staining
Environmental Protection Agency (EPA) Method 600/R-93/116 by Seattle Asbestos Test, Inc.
(SAT). SAT is accredited through the National Voluntary Laboratory Accreditation Program
(NVLAP) of the U. S. Department of Commerce. This accreditation does not constitute
endorsement, but rather a finding of laboratory competence (certification copy is attached).
SUMMARY/CONCLUSION
There were no asbestos-containing materials identified during the roof survey.
Any concealed building materials discovered during work activities, which are suspected to
contain asbestos, should be sampled by an AHERA-accredited asbestos building inspector
and analyzed by a NVLAP-accredited laboratory to confirm the presence of asbestos prior to
the disturbing such materials.
WAC 296-62-07721 and PSCAA Regulation III, Article 4 requires that this survey report to be
placed on-site during renovation and/or demolition and copies provided to the contractor(s)
bidding and performing work.
If you have any questions or need additional information, please contact me at (253) 351-0677.
Sincerely,
Kim Riche
Project Manager
Attachments
Jason Carlson
AHERA Building Inspector
This is to certify that
4 hours of refresher training as an
174627
Certificate Number
Instructor
Sep 10, 2019
Date(s) of Training
Expires in 1 year.
to comply with the training requirements of
has satisfactorily completed
TSCA Title II, 40 CFR 763 (AHERA)
EPA Provider # 1085
N/AExam Score:
(if applicable)
Hazardous Building Materials Survey — Watershed Building Roof
February 2020 C-1 Helix Design Group, Inc.
C-1. Summary of Materials Sampled for Asbestos
Sample Material Location AHERA Type HM Result
8792.3-WSB-01 Yellow fiberglass batt
insulation, paper,
yellow/brown mastic
Under metal roofing TSI 01 ND
8792.3- WSB-02 Yellow fiberglass batt
insulation, paper,
yellow/brown mastic
Under metal roofing TSI 01 ND
8792.3- WSB-03 Yellow fiberglass batt
insulation, paper,
yellow/brown mastic
Under metal roofing TSI 01 ND
8792.3- WSB-04 Yellow fiberglass batt
insulation paper and
mastic
Under metal roofing TSI 02 ND
8792.3- WSB-05 Yellow fiberglass batt
insulation paper and
mastic
Under metal roofing TSI 02 ND
8792.3- WSB-06 Yellow fiberglass batt
insulation paper and
mastic
Under metal roofing TSI 02 ND
8792.3- WSB-07 White and gray
sealant
Patch areas throughout
roof
Misc. 03 ND
8792.3- WSB-08 White and gray
sealant
Patch areas throughout
roof
Misc. 03 ND
8792.3- WSB-09 White sealant Around hatch Misc. 04 ND
8792.3- WSB-010 White sealant Around hatch Misc. 04 ND
8792.3- WSB-011 Black tar Patch areas throughout
roof
Misc. 05 ND
8792.3- WSB-012 Black tar Patch areas throughout
roof
Misc. 05 ND
8792.3- WSB-013 Gray sealant Around exhaust vents Misc. 06 ND
8792.3- WSB-014 Gray sealant Around exhaust vents Misc. 06 ND
8792.3- WSB-015 Black gasket Around screws on roof Misc. 07 ND
8792.3- WSB-016 Black gasket Around screws on roof Misc. 07 ND
8792.3- WSB-017 Black mastic on
paper
Underneath metal along
perimeter of roof
Misc. 08 ND
8792.3- WSB-018 Black mastic on
paper
Underneath metal along
perimeter of roof
Misc. 08 ND
HM = homogeneous material, Misc. = miscellaneous, ND = None detected, TSI = thermal system insulation.
Hazardous Building Materials Survey — Watershed Building Roof
February 2020 B-1 Helix Design Group, Inc.
Photo 1: North side of roof looking south
Photo 2: Yellow fiberglass batt insulation, paper/brown mastic and white sealant beneath the building.
Hazardous Building Materials Survey — Watershed Building Roof
February 2020 B-2 Helix Design Group, Inc.
Photo 3: Screws and black gaskets on roof.
Photo 4: Typical white and gray sealants on exhaust vents, hatch and patch areas.
Hazardous Building Materials Survey — Watershed Building Roof
February 2020 B-3 Helix Design Group, Inc.
Photo 5: Interior yellow fiberglass batt insulation paper and mastic.
Photo 6: Black tar patch areas on roof.