Attachment 4 - Sample Result.pdf

12421 W. 49TH AVENUE, UNIT #6

WHEAT RIDGE, CO 80033 (303) 463-8270

BULK ASBESTOS TEST REPORT

CLIENT: ANALYSIS DATE: 12-15-23

SDC LABORATORY REPORTING DATE: 12-19-23

2329 LAVA LANE RECEIPT DATE: 12-14-23

ALAMOSA, CO 81101 CLIENT JOB NO.: EAST BENCH BUNKHOUSE (RGNF)

CLIENT PROJECT: NONE GIVEN

DCMSL PROJECT: SDCL43

PERCENTAGE COMPOSITION BY VISUAL ESTIMATE

TOTAL

DCMSL SAMPLE SAMPLE TOTAL PERCENTAGE

SAMPLE NUMBER DATE PERCENT ASBESTOS ASBESTOS OTHER FIBROUS NON-FIBROUS IDENTIFIED NUMBER (C) (C) DESCRIPTION OF SAMPLE TYPE RANGE % IN SAMPLE CONSTITUENTS CONSTITUENTS MATERIALS

-1 EAST BENCH BUNKHOUSE 12-7-23 A. YELLOW MASTIC 1.0% ND 0.0 100.0 100.0

B. WHITE CAULK 3.0% ND 0.0 100.0 100.0

C. WHITE/TAN TILE 96.0% CHRYSOTILE [1-5] 4.0 ____________ 0.0 96.0

3.8

FOR CALCULATION PURPOSES, TRACE (TR) IS ASSUMED TO BE 0.5%.

(C) INFORMATION PROVIDED BY CLIENT (I) INSEPARABLE LAYERS ND - NONE DETECTED

THE SAMPLES WERE RECEIVED IN ACCEPTABLE CONDITION. THIS TEST REPORT RELATES ONLY TO THE ITEMS TESTED. THE RESULTS OF THIS REPORT APPLY TO THE SAMPLES AS RECEIVED FROM THE CLIENT. THIS REPORT MAY NOT BE

REPRODUCED EXCEPT IN FULL WITHOUT THE WRITTEN APPROVAL OF THE LABORATORY.

ALL INFORMATION PROVIDED BY OUR CLIENT, INCLUDING SAMPLE RESULTS, IS CONSIDERED PROPRIETARY AND CONFIDENTIAL. CLIENT RESULTS AND OTHER INFORMATION WILL NOT BE RELEASED TO ANYONE BUT THE CLIENT EXCEPT BY CLIENT REQUEST. WHEN THE LABORATORY IS REQUIRED BY LAW OR AUTHORIZED BY CONTRACTUAL ARRANGEMENT TO RELEASE CONFIDENTIAL INFORMATION, THE CLIENT OR INDIVIDUAL CONCERNED SHALL, UNLESS PROHIBITED BY LAW, BE NOTIFIED OF THE INFORMATION PROVIDED.

12421 W. 49TH AVENUE, UNIT #6

WHEAT RIDGE, CO 80033 (303) 463-8270

DCMSL Project No.: SDCL43

Bulk Sample Analysis

BULK SAMPLE ANALYSIS PROCEDURES:

DCM Science Laboratory, Inc (DCMSL) analyzes bulk asbestos samples following procedures developed by the McCrone Research Institue and in compliance with guidelines established by the Environmental Protection Agency (EPA-600/M4-82-020, 1982 and EPA-600/R-93/116, July 1993).

Bulk samples are prepared for analysis using a 10X-80X stero microscope in a hepa filter hood which provides a contamination-free environment. The sample is then analyzed by polarized light microscopy (PLM) at 100X. When the sample consists of more than one layer, each layer is prepared and analyzed separately. Fiber and matrix materials are identified by the characterization of optical properties including color and pleochroism, form, cleavage, relief, birefringence, extinction, orientation, twinning, interference figure and other distinguishing features. Dispersion staining is also used to further aid in mineral identification. All percentages of asbestos, other fibers and non-fibrous constituents are calculated from the values obtained from analyses using the stereo and PLM microscopes. In-house and NIST standards as well as a chart prepared by R. D. Terry and G. V. Chillinger for "The Journal of Sedimentary Petrology", (Volume 24, pp.229-334, 1955) provide a guide for estimating percentages. All samples are archived for six months unless other arrangements are made by the client.

ACCREDITATION:

DCMSL is accredited by NVLAP (since April 1, 1989). Our NVLAP Lab Code is 101258-0. DCMSL complies with NVLAP requirements unless otherwise noted.

ENDORSEMENT:

The results of this analysis must not be used by the client to claim endorsement by NVLAP or any agency of the U. S. Government.

The analysis was performed by:

12-15-23 John Silverman, Analyst Date

Ron Schott Laboratory Director

NVLAP Lab Code 101258-0

SDCL 4 3

Tierra de/ Sol Industrial Park - 2329 Lava Lane

PO Box 642. Alamosa. CO 81 l O l Phone: 719-589- 1024

\~ _-'. SDC Laborato ry ~> Email: juliez@sangrelabs.com www.sdclaboratory.com

C ain of Custody

PAYMENT IS DUE AT TIME OF SAMPLE DROP-OFF. NO EXCEPTIONS.

PLEASE FILL OUT INFORMA ION BELOW

Client Name:

Phone Number:

Address of Sample:

Date Collected: - 202--5

Time Collected:

Collected By:

Email:

nalysis(es) Requested □ IBact~ria $35

□ Loan Package $100

□ !Private Well Package $195

/ 'ill O he!!" • .. \ s. c.:. _, .;i-.,. ·., ALL PRICES SUBJECT TO CHANGE '

Relinquished by{i]/4._ ,,: .1~~

Date/Time: .L./. • ..:~ "2: t !?7-/ c. ::::.- / 2-,c.., Z

1 ·

FOR LAB USE ONLY

Lab Sample Number: !J }_J iJ 1 ---------------

Thank you! We appreciate you and are always here to help!

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