4166-22 SOQ-C clearance report 1-17-2023.pdf

EMSL Analytical, Inc.

464 McCormick Street San Leandro, CA 94577

Tel/Fax: (510) 895-3675 / (510) 895-3680 http://www.EMSL.com / sanleandrolab@emsl.com

EMSL Order: 092301139

Customer ID: ECSA42

Customer PO: 4166-22

Project ID:

Attention: JUSTIN VAUGHN Phone: (907) 512-6827

NWFF Environmental Fax:

PO Box 188 Received Date: 01/17/2023 09:00 AM

Philomath, OR 97370 Analysis Date: 01/17/2023

Collected Date: 01/15/2023

Project: 4166-22

Test Report: Fiber Count by Phase Contrast Microscopy (PCM), NIOSH 7400 Method - A Rules, Revision 3, Issue 3, 6/15/2019

Sample Location Sample Date Volume (L) Fibers Fields

LOD

(fib/cc) Fibers/mm² Fibers/cc Notes

FA1- BASEMENT 01/15/2023 1250 <5.5 100 0.0022 <7.01 <0.0022BASEMENT CLEARANCE

092301139-0001

FA2 - FIRST FLOOR 01/15/2023 1250 <5.5 100 0.0022 <7.01 <0.0022FIRST FLOOR

CLEARANCE

092301139-0002

3 01/15/2023 <5.5 100 <7.01BLANK

092301139-0003

4 01/15/2023 <5.5 100 <7.01BLANK

092301139-0004

This method requires the submission of field blanks with each sample set. No discernable field blanks were submitted, samples are not blank corrected.

Cecilia Yu, Laboratory Manager or other Approved Signatory

Analyst(s):

Matthew Wilson PCM 4

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. Limit of detection is 7 fibers/mm?. Fiber counts outside the recommended fiber density range of the method (100-1300 f/mm?) have greater than optimal variability and are probably biased. Field blank results, when available, are used to blank correct results. NIOSH 7400 requires field blanks be submitted at a rate of 10%, with a minimum of 2 per set. Measurement of uncertainty available upon request. The results in this report meet all requirements of the NELAC standards unless otherwise noted. Intra-laboratory Sr values: 5-20 fibers = 0.33, 21-50 fibers = 0.21, 51-100 fibers = 0.12. Inter-laboratory Sr values (Average of EMSL round robin data) =

0.35.

Samples analyzed by EMSL Analytical, Inc San Leandro, CA AIHA LAP, LLC-IHLAP Accredited #101748

Initial report from: 01/17/2023 03:25 PM

Printed: 01/17/2023 03:25 PM ASB_PCM_NoSig_0003_0001 Page 1 of 1