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September 7,2017 <br /> INvIL <br /> LABS <br /> Tanveer Khan INDUSTRIALHYGIENE <br /> NVL Field Services Division SERVICES <br /> 4708 Aurora Ave. N. Laboratory j Management l Training <br /> Seattle, WA 98103 <br /> RE: Bulk Asbestos Fiber Analysis;NVL Batch#1715847.00 <br /> Client Project:2017-0728 <br /> Location: 1111 34th St. Everett,WA 98201 <br /> Dear Mr. Khan, <br /> Enclosed please find test results for the 9 sample(s) submitted to our laboratory for analysis on 9/5/2017. <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 both EPA 600/M4-82-020, <br /> Interim Method for the Determination of Asbestos in Bulk Insulation Samples and EPA 6001R-93/116 <br /> Method for the Determination of Asbestos in Bulk Building 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 /> Nick Ly, Technical Director <br /> p <br /> 1.884.NVL.LABS <br /> Enc.: Sample Results VIM@ <br /> NVL Laboratories,Inc. <br /> Lab Code:102063-0 4708 Aurora Ave N,Seattle,WA 98103 <br /> www.nvliabs.com p 206.547.0100 I f 206.634.1936_ <br /> Page)- "- 3 <br />