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tID <br /> 9 <br /> NVNVL <br /> June 19, 2023 <br /> INDUSTRIAL HYGIENE SERVICES <br /> LABORATORY•MANAGEMENT-TRAINING <br /> Daniel Sheppard <br /> Terracon- Mountlake Terrace <br /> 21905 64th Ave.W#100 <br /> Mountlake Terrace,WA 98043 <br /> RE: Bulk Asbestos Fiber Analysis; NVL Batch #2309392.00 <br /> Client Project: 81227459 <br /> Location: POE Equator Shed <br /> Dear Mr. Sheppard, <br /> Enclosed please find test results for the 12 sample(s) submitted to our laboratory for analysis on <br /> 6/14/2023. <br /> Examination of these samples was conducted for the presence of identifiable asbestos fibers using <br /> polarized light microscopy (PLM) with dispersion staining in accordance with U. S. EPA 40 CFR <br /> Appendix E to Subpart E of Part 763, Interim Method for the Determination of Asbestos in Bulk <br /> Insulation Samples and EPA 600/R-93/116, Method for the Determination of Asbestos in Bulk Building <br /> Materials. <br /> For samples containing more than one separable layer of materials, the report will include findings for <br /> each layer (labeled Layer 1 and Layer 2, etc. for each individual layer). The asbestos concentration in <br /> the sample is determined by calibrated visual estimation. <br /> For those samples with asbestos concentrations between 1 and 10 percent based on visual estimation, <br /> the EPA recommends a procedure known as point counting (NESHAPS, 40 CFR Part 61). Point <br /> counting is a statistically more accurate means of quantification for samples with low concentrations of <br /> asbestos. <br /> The detection limit for the calibrated visual estimation is <1%, 400 point counts is 0.25% and 1000 point <br /> counts is 0.1% <br /> Samples are archived for two weeks following analysis. Samples that are not retrieved by the client are <br /> discarded after two weeks. <br /> Thank you for using our laboratory services. Please do not hesitate to call if there is anything further we <br /> can assist you with. <br /> Sincerely, <br /> NOMA <br /> Kunga Woser, Senior Laboratory Analyst Testing <br /> Lab Code:102063-0 <br /> Enc.: Sample Results <br /> Phone: 206 547.0100 I Fax: 206 634.1936 Toll Free: 1.888.NVL.LABS (685.5227) <br /> 4708 Aurora Avenue North Seattle, WA 98103-6516 <br /> page 1 of 7 <br />