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ANN& Accredited by <br /> =Q= U.S. Dept. of Commerce <br /> ASBESTOS TEM LABORATORIES, INC CA DOHS FLAP <br /> August 01, 1996 <br /> Ms. Linda Schneider <br /> Sequoia Analytical-Sacto. <br /> 819 West Striker Ave. <br /> Sacramento, CA 95834 <br /> 1. RE: LABORATORY JOB# 339-022 <br /> Polarized light microscopy analytical results for 4 bulk sample(s). <br /> Job Site: <br /> Job No.: 6071239 <br /> Enclosed please find the bulk material analytical results for one or more samples submitted for asbestos analysis. <br /> The analyses were performed in accordance with EPA Method 600/R-931116 for the determination of asbestos in <br /> bulk building materials by polarized light;microscopy(PLM). Please note that while PLM analysis is commonly <br /> performed on non-friable and fine grained materials such as floor tiles and dust, the EPA method recognizes that <br /> PLM is subject to limitations. In these situations,accurate results may only be obtainable through the use of more <br /> sophisticated and accurate techniques such as transmission electron microscopy (TEM)or X-ray diffraction <br /> (XRD). <br /> Prior to analysis, samples are logged-in and all data pertinent to the sample recorded. The samples are checked for <br /> damage or disruption of any chain-of-custody seals. A unique laboratory ID number is assigned to each sample. <br /> A hard copy log-in sheet containing all pertinent information concerning the sample is generated. This and all <br /> other relevant paper work are kept with the sample throughout the analytical procedures to assure proper analysis. <br /> Each sample is opened in a class 100 NEPA negative air hood. A representative sampling of the material is <br /> selected and placed onto a glass microscope slide containing a drop of refractive index oil. The glass slide is <br /> placed under a polarizing light microscope where standard mineralogical techniques are used to analyze and <br /> quantify the various materials present, including asbestos. The data is then compiled into standard report format <br /> and subjected to a thorough quality assurance check before the information is released to the client. <br /> s Sincerely Yours, <br /> EG AUG <br /> Lab Manager <br /> ASBESTOS TEM LABORATORIES, INC. =i_`s`;{ i.1. <br /> Fri ' <br /> ---These results relate only to the samples tested and must not be reproduced,except in full, with the approval of <br /> the laboratory. This report must not be used to claim product endorsement by NVLAP or any other agency of the <br /> U.S. Government. --- <br /> 1409 FIFTH STREET,SUITE C • BERKELEY,CA 94710 • (510)528-0108 • FAX(510)528-0109 <br />