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Accredited by <br /> =Q= U.S.Dept.of <br /> Commerce <br /> ASBESTOS TEM LABORATORIES, INC CA DOHS ELAP <br /> July 17,2001 <br /> Mr. Lonnie Kellar <br /> Sierra Chemical Company <br /> 2302 Larkin Circle <br /> Sparks,NV 89431 <br /> RE: LABORATORY JOB# 900-351 <br /> Polarized light microscopy analytical results for I bulk sample(s). <br /> Job Site: Stockton,CA <br /> Job No.: <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-93/116 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 HEPA 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 /> Sincerely Yours, <br /> Lab Manager <br /> ASBESTOS TEM LABORATORIES, INC. <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 /> 1016 GREG STREEI . SPARKS,NV 89431 • (775)359-3377 • FAX(775)359-2798 <br /> With Home Offices Located at: 1409 FIFTH STREET,SUITE C, BERKELEY,CA 94710 (510)528-0108 <br />