B08_Attach_14_CH-2119_Alcatraz_Wharf_Report.pdf

CRAIG W. HEIDIG, CAC

Asbestos Consulting & Industrial Hygiene

541 Lancaster Way • Redwood City, CA 94062 • Mobile: (415) 505-0450 • cwh@alum.berkeley.edu

September 3, 2021

Sean Hart, P.E.

Moffatt & Nichol 2185 N. California Blvd., Suite 500 Walnut Creek, CA 94596 shart@mofattnichol.com

Subject: Asbestos Survey Report Alcatraz Island Concrete Wharf, San Francisco, CA Project Number CH-2119

Dear Mr. Hart:

This letter report summarizes the observations and results of an asbestos survey by Mr. Craig Heidig, a California Division of Occupational Safety and Health (DOSH) Certified Asbestos Consultant (CAC), from the Concrete Wharf at Alcatraz Island in San Francisco Bay in the Golden Gate National Recreation Area, California (Site). Asbestos or trace-asbestos materials that were identified are summarized below.

Table 1 – Hazardous Materials Summary

Material Description Location Quantity

No Hazardous Materials Found sf = square feet

On Friday, August 27, 2021, Mr. Heidig collected six (6) bulk samples for asbestos content from the Site at the request of Mr. Sean Hart. The sampling was performed to identify any asbestos-containing material (ACM) in preparation for concrete repairs at the Site. Asbestos surveys must be completed prior to all renovation and demolition projects to comply with Bay Area Air Quality Management District (BAAQMD) and/or United States Environmental Protection Agency (EPA) requirements.

The Site consists of a large concrete wharf over San Francisco Bay.

Asbestos

Bulk samples for asbestos fibers were collected of three (3) homogeneous materials from the Concrete Wharf, including concrete from the deck, the columns, and shotcrete patches.

PLM analysis of the samples was performed at Eurofins EMLab P&K, LLC (EMLab) in South San Francisco, CA. EMLab is accredited by the National Voluntary Laboratory Accreditation Program (NVLAP) for bulk asbestos fiber analysis. The results of the samples are summarized in the table below and included as Attachment A. Items in bold contain concentrations of asbestos greater than 1% (ACM). Items in italic contain concentrations less than or equal to 1% (trace-asbestos).

Asbestos Survey Report

Alcatraz Island Concrete Wharf, San Francisco, CA Project Number CH-2119

Table 2 –Asbestos Sample Results

Material Description Sample Location(s) Sample I.D. Results (% Type)

Concrete Deck Near Column Y-8 AW-1A ND Near Column Q-13 AW-1B

Shotcrete Patch Near Column Y-9 AW-2A ND Near Column P-10 AW-2B

Concrete Column Column T-10 AW-3A ND Column M-12 AW-3B ND = None detected

Analysis of the bulk samples from the Site indicates that asbestos was detected in zero (0) of the six (6) samples.

The laboratory reports and sample chain-of-custody forms are included as Attachment A, a sample and material location diagram is included as Attachment B, and asbestos consultant certification is included as part of Attachment C.

Conclusion

Zero (0) of the three (3) materials suspect for asbestos sampled at the Site were found to be asbestos-containing or trace asbestos-containing.

If you have any questions or need abatement specification and/or oversight services, or other related services, please feel free to e-mail me at cwh@alum.berkeley.edu, or call or text me at

(415) 505-0450.

Thank you for the opportunity to serve you.

Sincerely, Craig Heidig, CAC #97-2210

Attachment A – Asbestos Sample Laboratory Report & Chain of Custody Attachment B – Sample & Material Location Diagram Attachment C – Asbestos Consultant Certification

Attachment A

Asbestos Sample Laboratory Report & Chain of Custody

Approved by:

Approved Signatory Balu Krishnan

Report for:

Mr. Craig W. Heidig Craig W. Heidig, CAC 541 Lancaster Way Redwood City, CA 94062

Regarding: Project: CH-2119; Alcatraz Island Wharf, Alcatraz Island, San Francisco Bay, CA

EML ID: 2720237

All samples were received in acceptable condition unless noted in the Report Comments portion in the body of the report. The results relate only to the samples as received and tested. The results include an inherent uncertainty of measurement associated with estimating percentages by polarized light microscopy. Measurement uncertainty data for sample results with >1% asbestos concentration can be provided when requested.

Eurofins EMLab P&K ("the Company") shall have no liability to the client or the client's customer with respect to decisions or recommendations made, actions taken or courses of conduct implemented by either the client or the client's customer as a result of or based upon the Test Results. In no event shall the Company be liable to the client with respect to the Test Results except for the Company's own willful misconduct or gross negligence nor shall the Company be liable for incidental or consequential damages or lost profits or revenues to the fullest extent such liability may be disclaimed by law, even if the Company has been advised of the possibility of such damages, lost profits or lost revenues. In no event shall the Company's liability with respect to the Test Results exceed the amount paid to the Company by the client therefor.

Dates of Analysis:

Asbestos PLM: 09-01-2021

Service SOPs: Asbestos PLM (EPA 40CFR App E to Sub E of Part 763 & EPA METHOD 600/R-93-116, SOP EM-AS-S-1267) NVLAP Lab Code 200844-0

EMLab ID: 2720237, Page 1 of 3Eurofins EPK Built Environment Testing, LLC

Eurofins EMLab P&K 3000 Lincoln Drive East, Suite A, Marlton, NJ 08053

(866) 871-1984 Fax (856) 334-1040 www.emlab.com Client: Craig W. Heidig, CAC C/O: Mr. Craig W. Heidig Re: CH-2119; Alcatraz Island Wharf, Alcatraz Island, San Francisco Bay, CA

Date of Sampling: 08-27-2021 Date of Receipt: 08-27-2021 Date of Report: 09-01-2021

ASBESTOS PLM REPORT

Total Samples Submitted: 6 Total Samples Analyzed: 6

Total Samples with Layer Asbestos Content > 1%: 0

Location: AW-1A, Concrete deck, near column Y-8 Lab ID-Version‡: 13012758-1

Sample Layers Asbestos Content Gray Concrete ND

Sample Composite Homogeneity: Good

Location: AW-1B, Concrete deck, near column Q-13 Lab ID-Version‡: 13012759-1

Sample Layers Asbestos Content Gray Concrete ND

Sample Composite Homogeneity: Good

Location: AW-2A, Shotcrete patch, near column Y-9 Lab ID-Version‡: 13012760-1

Sample Layers Asbestos Content Light Gray Concrete ND

Sample Composite Homogeneity: Good

EMLab ID: 2720237, Page 2 of 3Eurofins EPK Built Environment Testing, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The report must not be used by the client to claim product certification, approval, or endorsement by any agency of the federal government. Eurofins EMLab P&K 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.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is reflected by the value of "x".

Eurofins EMLab P&K 3000 Lincoln Drive East, Suite A, Marlton, NJ 08053

(866) 871-1984 Fax (856) 334-1040 www.emlab.com Client: Craig W. Heidig, CAC C/O: Mr. Craig W. Heidig Re: CH-2119; Alcatraz Island Wharf, Alcatraz Island, San Francisco Bay, CA

Date of Sampling: 08-27-2021 Date of Receipt: 08-27-2021 Date of Report: 09-01-2021

ASBESTOS PLM REPORT

Location: AW-2B, Shotcrete patch, near column P-10 Lab ID-Version‡: 13012761-1

Sample Layers Asbestos Content Black Concrete ND

Sample Composite Homogeneity: Good

Location: AW-3A, Concrete column, column T-10 Lab ID-Version‡: 13012762-1

Sample Layers Asbestos Content Brown Concrete ND

Sample Composite Homogeneity: Good

Location: AW-3B, Concrete column, column M-12 Lab ID-Version‡: 13012763-1

Sample Layers Asbestos Content Brown Concrete ND

Sample Composite Homogeneity: Good

EMLab ID: 2720237, Page 3 of 3Eurofins EPK Built Environment Testing, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The report must not be used by the client to claim product certification, approval, or endorsement by any agency of the federal government. Eurofins EMLab P&K 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.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is reflected by the value of "x".

Attachment B

Sample & Material Location Diagram

ASBESTOS SAMPLE LOCATIONS

AUGUST 27, 2021

Attachment C

Asbestos Consultant Certification