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i <br /> Accredited by <br /> U.S.Dept.of C mmerce <br /> SlL;J <br /> I <br /> ASBESTOS TEM LABORATORIES, INC NVLAP LAB CODE 101891-0 <br /> CA DOHS ELAP <br /> Oct/19/2008 <br /> Bill Johnston <br /> Shaw Environmental&Infrastructure <br /> 2880 Zanker Road,Suite 101 <br /> San Jose,CA 95134 <br /> RE: LABORATORY JOB# 1199-00007 <br /> Transmission electron microscopy analytical results for 5 air sample(s)- <br /> Job Site: Forward Land Fill <br /> Job No.: Not listed on CoC <br /> Enclosed please find results for the TEM analysis of one or more air samples.The analytical procedures were <br /> performed according to the NIOSH 7402(Revision#i) method_ Prior to analysis, samples are checked for damage <br /> and disruption of the chain-of-custody seal. Samples are then logged-in,each given a unique laboratory number,and <br /> a hard copy containing all pertinent information is generated. This,and all other relevant paper work are kept with <br /> each sample throughout the analytical procedures to assure proper analysis. <br /> Preparation of air filter cassettes is performed within a NEPA filtered,Class 100 air,laminar flow clean bench <br /> environment. Cassettes are lwet-wiped to remove any external contamination prior to placement into the clean bench <br /> area. Sections of the filters are removed,placed onto glass microscope slides,and collapsed in acetone vapor. The <br /> collapsed filters are plasma etched.removing the surface of the filter to a depth of ten percent of its original thickness, <br /> then carbon coated. The filters are further sectioned and placed carbon side up onto 200-mesh copper TEM sample <br /> grids in an acetone wick washer to remove filter material. The grids are placed into labeled containers and loaded into <br /> the microscope for analysis. <br /> TEM analysis is performed on a Philips EM-300 transmission electron microscope operating at 80 or 100 kV,with a <br /> magnification as indicated on the analytical report. A known area of the specimen surface is scanned for fibrous <br /> structures. All structures exhibiting an aspect ratio greater than or equal to 3 to 1,and a length greater than or equal <br /> to 5.0 um are subjected to detailed morphological and selected area diffraction(SAED)analysis. Structures indicated <br /> as asbestos,or potentially asbestos,are further analyzed by energy dispersive X-ray(EDX)analysis as needed. <br /> Analysis continues until 100 asbestiforn structures are found,or an analytical sensitivity of 0.001 structures/cc is <br /> attained,or 40 grid openings are analyzed. Data is compiled into a standard report format and subjected to a thorough <br /> quality assurance check before the information is released to the client. <br /> Sincerely Yours, <br /> I <br /> Laboratory Manager <br /> ASBESTOS TEM LABORATORIES,INC. <br /> ---These results relate only to the samples tested and must not bereproduced,except in full,with the approval of the <br /> laboratory. This report must not be used to claim product endorsement by N V LAP or any other agency of the U.S. <br /> Government.--- <br /> I <br /> r <br /> 630 BANCROFT WAY BERKELEY,CA 94710 (510)704-8930 • FAX(510)704-8429 <br /> www.asbestostemlabs.com With Offices in Reno, NV(775)359-3377 <br />