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i , .. ' . O� `� � j ngstrom Analytical& � 0 Environmental Services e♦ 0 5001 Cedar Lake Road*St.Louis Park,MN 55416 952-252-0405 fax:952-252-0407 ANALYSIS OF BULK SAMPLES FOR ASBESTOS USING POLARIZED LIGHT Burns Ezcavating 3470 County Rd.21 Mayer,MN 55360 Via email: steve@burnsexcavating.net Re: 2605 Kelly Ave. METHOD AND DEFIMTIONS The submitted samples were analyzed using the EPA Interim Method #600/M4-82-030 (polarized light microscopy tivith optional dispersion stninirt�. The method deftnes an asbestos-containing ntaterial as one that contains greater than 1% asbestos by weigh�and nsbestos is defined ns the fibrous forrrts of serpentine nncl certnin amphiboles. While the,fibrous and non_fibrous forms of minerals are discernible macroscopically in hand specimens, the distinetion beriveen them is not clear on a microscopic level, especially after processing or manufacturing. Fibrous amphiboles are generally those whose menn aspect ratios(length over width) under the microscope are approximately>10; non-fibrous amphiboles are generally those tivhose mean aspect ratios are approximately <6. During analysis, morphology and an estimate of inean aspect ratio are used to crssign a given mineral fiber poparlation to fibrous of non fibroa�s categories. That non-fcbrous c�mphiboles are not reported as asbestos is cortsistent with mineralogical definitions but does not imply that non-fibrous c�mphiboles nre not hazcrxdous. Airborne concentrations of them mcry be regulated by OSHA under certain circumstc�nces. The type of dispersion staining used is generally phase contrast,although central stop dispersion staining may also be aised. PERCENTAGE REPORTING The percentc�ge of each fiber type present was determined using volume percents estimnted from stereoscopic examinRtion, projected area percents from mounted slide�zamination nnd percents from comparison to weight percent standards. Such estimations are suitable for most samples, but do hnve large error ranges. Errors are estimnted to be 100 relative percent uncertainty for percentage estimates under 10%rc�nging down to as little as 10 relative percent uneertainty for percentage estimates greater than SO%. Friable samples which have been estimc�ted by the above methods to contain less than 10% asbestos can be point-counted, nccording to the EPA Interim Method, cts required by 1VESHAPS. In low percentage samples, point counting may produce false negntives or positives, due to the small number of points counted.For samples consisting of more than one apparent type of material or layer, the percentage of each fiber type in each type of material or Ic�yer is determined and reported separately; an overall avernge for the sample of each fiber type is then calculated. The reported I friability of n sample refers to that friability observed in the condifion c�nalyzed (broken, crushecf, etc), and is not to be substituted for an on-site assessment of friability. Ench Angstrom�4nalytical Lab report relates only to the sample tested and � may not, due to the sampling process, be representative of the material sampled. For datst sc�mpling no percentage or rating is given. The results can only be expressed in positive or negative terms. In our analysis a positive result, meaning asbestos was detected in the dust, is listed ns present. A negative result,meaning no asbestos was detected in the dust is listed as none detected or ND. If r�t so»se point, additional copies of these results are requested a$S0.00 ad�rtinistr�ation charge will be assesse�l to retrieve records from our archive. -----------------------------------------------------------------------------Date January 7,2014 Steve Wallinga, Angstrom Analytical,Inc. Full Service Laboratory and on-site Industrial Hygiene Services for the Hazardous Material Abatement Indusriy