25-0004 Asbestos Survey.pdf

Asbestos Survey Building 1860 Roof Repairs

MCB Camp Lejeune

Project # 25-0004

Report Prepared By:

Christopher B. Walker The Walker Group Architecture, Inc

April 2nd, 2026 WGA Project No. – 2601.1860

Project Information

The Walker Group Architecture, Inc. was contracted by NRW Engineering to conduct an asbestos sampling survey for the roof of Building 1860 at Marine Corps Base Camp Lejeune. The specified structure is slated for complete removal and replacement of the existing modified bitumen roof system. An asbestos survey has been requested prior to disturbance of any potential asbestos containing materials (ACM).

Scope of Services

A. The survey was performed on 02/10/26 by Christopher B. Walker (NC Accredited Inspector #12878, expires June, 2026). The sampling was conducted in general accordance with the U.S. Environmental Protection Agency (EPA) requirements as defined in the asbestos Hazards Emergency Response Act (40 CFR Part 763) guidelines (AHERA) and in general accordance with the North Carolina Health Hazards Control Unit (NCHHCU).

B. The survey was conducted to identify the presence of asbestos containing materials (ACM) prior to repairs to the building.

C. The building was assessed to determine homogenous areas (groups of materials appearing to have been installed in the same general time period and uniform in color and texture).

D. As per AHERA, sufficient samples were collected from random locations of each homogenous area, with the number of samples based on the following criteria:

a. Thermal Insulation Materials (piping, breeching, boiler insulation, etc.) – A minimum of (3) samples are required. Patch areas (less than 6 square or liner feet) may have (2) sample collected.

b. Surfacing Materials (plaster, fireproofing, etc.) – A minimum of (7) samples are to be taken for areas greater than 5,000 square feet, five (5) samples for areas greater than 1,000 square feet, but less than 5,000 square feet, three (3) samples for areas less than 1,000 square feet, two (2) samples for patching materials.

c. Miscellaneous Materials (flooring, adhesives, roofing, wallboard, etc.) – A minimum of (2) samples are required.

If any one sample of a material from a homogenous area is found to be positive, then that material is considered positive, regardless of results of other samples of that material, within that area.

Samples

A. The Walker Group Architecture collected suspect samples and shipped them to EMSL Analytical, Inc. (NVLAP Accredited Laboratory 102104-0) for PLM (polarized Light Microscopy) analysis. In an effort to reduce cost, the Walker Group instructed the laboratory to Stop Analysis at the first positive sample for each suspect material HGA and not to analyze the remaining samples from the same HGA.

Building Description and Findings

Building 1860 is an active shop and administration building. The roof system is a modified bitumen roof system over rigid insulation and steel decking. There are metal gravel stops and all edges and metal fascia that extend

MCB Camp Lejeune over metal wall panels. There is a high and low section to the roof and many roof penetrations from vents, roof drains, and mechanical equipment.

A. Laboratory Results

Material Material

Type Location Friability Laboratory Result Approx.Quantity

Modified Bitumen Roof Membrane

Misc Roof NF Non-Detected N/A

White flashing at roof penetrations

Misc Miscellaneous Roof Penetrations

NF Non-Detected N/A

Black flashing at roof penetrations

Misc Miscellaneous Roof Penetrations

NF Non-Detected N/A

Based on the sample lab analysis none of the materials sampled were found to be Asbestos Containing Materials.

Disposal

A. In accordance with the NCHHCU regulations, asbestos containing materials (ACM) waste should be taken to an approved landfill. All demolition/renovation work must be performed in accordance with NESHAP asbestos regulations, 40CFR61, Subpart M, and OSHA Regulations 29 CFR 1926.1101. Any disturbance should be conducted in accordance with federal, state, and local regulations.

Recommendations

A. Any demolition/renovation work in which ACM is disturbed must be in compliance with, EPA, OSHA and the state of North Carolina regulations. Abatement work shall be conducted by NC Accredited asbestos workers under the supervision of a NC accredited asbestos supervisor. The contractor conducting asbestos abatement activities must notify the North Carolina Department of Health and Human Services (HHS) ten (10) days prior to the disturbance of ACM if it is friable and greater than or equal to 160 square feet, 260 linear feet or 35 cubic feet.

B. If additional suspect materials are discovered during demolition/renovation, they should be classified presumed to be asbestos-containing until sampling by a state of North Carolina licensed Asbestos Building Inspector personnel and analysis by a NVLAP-Accredited and state of North Carolina licensed laboratory can be performed.

MCB Camp Lejeune

See attached for Accreditations, Asbestos Lab Results and Chain of Custody. If further information is required, please contact me at 1-252-636-8778

Report Prepared by:

Christopher B. Walker, AIA North Carolina Asbestos Inspector Accreditation# 12878 The Walker Group Architecture, Inc., PO Box 541, New Bern, NC 28560

EMSL Analytical, Inc.

706 Gralin Street Kernersville, NC 27284

Tel/Fax: (336) 992-1025 / (336) 992-4175 http://www.EMSL.com / kernersvillelab@emsl.com

022601026EMSL Order:

Customer ID: WALK85

Customer PO:

Project ID:

Attention: Phone:Chris Walker (252) 636-8778

Fax:The Walker Group Architecture (252) 636-8992

Received Date:PO Box 541 03/16/2026 2:00 PM

Analysis Date:New Bern, NC 28563 03/18/2026

Collected Date:

Project: B1860

Test Report: Asbestos Analysis of Bulk Materials via AHERA Method 40CFR 763 Subpart E

Appendix E supplemented with EPA 600/R-93/116 using Polarized Light Microscopy

Sample Description Appearance % Fibrous % Non-Fibrous

Non-Asbestos Asbestos

% Type

01-Rubber Membrane

022601026-0001

None DetectedQuartz

Ca Carbonate

Non-fibrous (Other)

5%

10%

85%

White

Non-Fibrous

Homogeneous membrane roof system

01-Tar

022601026-0001A

None DetectedNon-fibrous (Other)100%Cellulose

Glass

<1%

<1%

Black

Non-Fibrous

Homogeneous membrane roof system

022601026-0002

None DetectedNon-fibrous (Other)94%Cellulose

Glass

1%

5%

Brown/White/Black

Fibrous

Heterogeneous membrane roof system

022601026-0003

None DetectedCa Carbonate

Non-fibrous (Other)

10%

90%

White

Non-Fibrous

Homogeneous white flashing

022601026-0004

None DetectedCa Carbonate

Non-fibrous (Other)

10%

90%

Cellulose<1%White/Black

Non-Fibrous

Heterogeneous white flashing

022601026-0005

None DetectedNon-fibrous (Other)100%Cellulose

Glass

<1%

<1%

Black

Non-Fibrous

Homogeneous black flashing

022601026-0006

None DetectedNon-fibrous (Other)100%Cellulose<1%Black

Non-Fibrous

Homogeneous black flashing

Analyst(s)

Cameron Evans (4)

Scott Combs (3)

Stephen Bennett, Laboratory Manager or Other Approved Signatory

EMSL maintains liability limited to cost of analysis. Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. The report reflects the samples as received.

Results are generated from the field sampling data (sampling volumes and areas, locations, etc.) provided by the client on the Chain of Custody. Samples are within quality control criteria and met method specifications unless otherwise noted. The above analyses were performed in general compliance with Appendix E to Subpart E of 40 CFR (previously EPA 600/M4-82-020 “Interim Method”) but augmented with procedures outlined in the 1993 (”final”) version of the method. This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST or any agency of the federal government. Non-friable organically bound materials present a problem matrix and therefore EMSL recommends gravimetric reduction prior to analysis. Unless requested by the client, building materials manufactured with multiple layers (i.e. linoleum, wallboard, etc.) are reported as a single sample. Estimation of uncertainty is available on request.

Samples analyzed by EMSL Analytical, Inc. Kernersville, NC NVLAP Lab Code 102104-0, Virginia 3333-000228, West Virginia LT000321

Initial report from: 03/19/2026 08:32:48

Page 1 of 1ASB_PLM_0008_0002 - 2.31 Printed: 3/19/2026 8:32 AM

OrderID: 022601026