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___________________________________________________________________________________________________________ Luzenac 345 Inverness Drive South Suite 310 Centennial, CO 80112 (303) 643-0451 Fax: (303) 643-0446 TECHNICAL REPORT To: From: R. J. Zazenski Julie W. Pier Analytical and Technical Support Project No.: Various Date: 11-Mar-04 Copy: R. Godell, E. Shuman Subject: SUMMARY OF TEM ASBESTOS RESULTS: GRADE 66/96 USP PRODUCT COMPOSITES Confidential Results: The following results (attached) were obtained using the current ASTM draft method "Standard Test Method for Indirect Analysis of Talc by Transmission Electron Microscopy for Asbestos Mass Concentration." The analytical sensitivity is defined for each sample based on the smallest detectable fiber given the analysis parameters for that sample. "ND" (not detected) is reported when no fibers are detected. A program of laboratory "blank" analysis is in place and has been used to determine the level of significance for this analysis according to ASTM method D 6620-00, "Standard practice for asbestos detection limit based on counts." Based on the analysis of 100 laboratory blanks, the detection of one fiber on a given sample preparation has been determined to be insignificant. "NS" (not significant) is reported when only one fiber (structure) was detected. When 2 or more fibers (structures) are detected, the actual result (ppm) is reported. CAM-358 ITA-Ratcliff-000867 SUMMARY OF TEM ASBESTOS RESULTS: GRADE 66/96 USP PRODUCT COMPOSITES 11-Mar-04 Confidential Table 1. Summary of results Sample Description Sample No. Grade 66 composite: 2nd Quarter, 2001 Grade 66 composite: 3rd Quarter, 2001 Grade 66 composite: 4rd Quarter, 2001 Grade 96 composite: 1rd Quarter, 2002 Grade 96 composite: 2rd Quarter, 2002 Grade 96 composite: 3rd Quarter, 2002 Grade 96 composite: 4rd Quarter, 2002 Grade 96 composite: 1rd Quarter, 2003 Grade 96 composite: 2rd Quarter, 2003 Grade 96 composite: 3rd Quarter, 2003 A01314-1 A01571-1 A02008-1 A02224-1 A02400-1 A02524-1 A03038-1 A03098-1 A03372-1 A03499-1 Amphibole Structures >5 m <5 m 00 00 00 00 00 00 00 00 00 00 Amphibole Content (ppm) ND ND ND ND ND ND ND ND ND ND TEM Analysis Chrysotile Structures >5 m <5 m 00 00 00 01 00 00 01 00 01 01 Chrysotile Content (ppm) ND ND ND NS ND ND NS ND NS NS ND = Not detected (see report text). NS = Not significant (see report text). NA = Not analyzed (insufficient sample). Structure (S) Concentration S (x 106)/g PLM Analysis (+200 Mesh) Amphibole Chysotile Asbestos Asbestos %% <85 NA NA <86 NA NA <87 NA NA <132 NA NA <87 NA NA <80 NA NA <133 NA NA <82 NA NA <129 NA NA <205 NA NA ITA-Ratcliff-000868 SUMMARY OF TEM ASBESTOS RESULTS: GRADE 66/96 USP PRODUCT COMPOSITES 11-Mar-04 Confidential Sample Description. Sample No. Grade 66 composite: 2nd Quarter, 2001 Grade 66 composite: 3rd Quarter, 2001 Grade 66 composite: 4rd Quarter, 2001 Grade 96 composite: 1rd Quarter, 2002 Grade 96 composite: 2rd Quarter, 2002 Grade 96 composite: 3rd Quarter, 2002 Grade 96 composite: 4rd Quarter, 2002 Grade 96 composite: 1rd Quarter, 2003 Grade 96 composite: 2rd Quarter, 2003 Grade 96 composite: 3rd Quarter, 2003 A01314-1 A01571-1 A02008-1 A02224-1 A02400-1 A02524-1 A03038-1 A03098-1 A03372-1 A03499-1 Starting Weight (g) 0.0367 0.0363 0.0355 0.0373 0.0358 0.0388 0.0369 0.0378 0.0382 0.0240 Aliquot Filtered (mL) 0.5 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Grid Spaces (#) 20 10 10 10 10 10 10 10 10 10 Sample Analyzed (ng) 35 35 34 36 35 37 36 36 37 23 *The analytical sensitivity for this method is defined as 1 fiber (ASTM D 5756-00). TEM Amphibole Sensitivity* ppm NA TEM Chrysotile Sensitivity* ppm 0.02 NA 0.02 NA 0.02 NA 0.02 NA 0.02 NA 0.02 NA 0.02 NA 0.02 NA 0.02 NA 0.03 ITA-Ratcliff-000869