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Pace Analytical Services, Inc. 1700 Elm Street. Suite 200 ^ace AnalyticsI Minneaoolis, MN S5414 Phane: 612.6074700 www.pacelatis.com Fax: 612.607.6444 TABLE 4. High Resolution Calibration Solutions________ Concentration (pq/uL) Native CDDs/CDFs CS1 CS2 CS3 CS4 CSS 2,3,7,8-TCDD 0.5 2 10 40 200 2,3,7,8 TCDF 0.5 2 10 40 200 1,2,3,7,8-PeCDD 2.5 10 50 200 1000 1,2,3,7,8-PeCDF 2.5 10 50 200 1000 2,3,4,7,8-PeCDF 2.5 10 50 200 1000 1,2,3,4,7,8-HxCDD 2.5 10 50 200 1000 1,2,3,6,7,8-HxCDD 2.5 10 50 200 1000 1,2,3,7,8,9-HxCDD 2.5 10 50 200 1000 1,2,3,4,7,8-HxCDF 2.5 10 50 200 1000 1,2,3,6,7,8-HxCDF 2,5 10 50 200 1000 1,2,3,7,8,9-HxCDF 2.5 10 50 200 1000 2,3,4,6,7,8-HxCDF 2.5 10 50 200 1000 1,2,3,4,6,7,8-HpCDD 2.5 10 50 200 1000 1,2,3,4,6,7,8-HpCDF 2.5 10 50 200 1000 1,2,3,4,7,8,9-HpCDF 2.5 10 50 200 1000 OCDD 5.0 20 100 400 2000 OCDF 5.0 20 100 400 2000

Internal Standards 2,3,7,8-TCDD-^2C^2 100 100 100 100 100 2,3,7,8-TCDF-’®Ci2 100 100 100 100 100 1,2,3.7,8-PeCDD-’2Ci2 100 100 100 100 100 1,2,37.8-PeCDF-’3Ci2 100 100 100 100 100 2,3,4,7,8-PeCDF-^3Ci2 100 100 100 100 100 1,2,3,4,7,8-HxCDD’’®Ci2 100 100 100 100 100 1,2,3,6,7,8-HxCDD-^’Ci2 100 100 100 100 100 1,2,3,4,7,8-HxCDF-’^Ci2 100 100 100 100 100 1,2,3,6,7,8-HxCDF-’®Ci2 100 100 100 100 100 1,2,3,7,8,9-HxCDF-’®Ci2 100 100 100 100 100 2,3,4,6,7,8-HxCDF-^"C,2 100 100 100 100 100 1,2,3,4,6,7,8-HpCDD- ’3C,2 100 100 100 100 100 L2,3,4,6,7,8-HpCDF-^3C^2 100 100 100 100 100 1,2,3,4,7,8,9-HpCDF- ’3Ci2 100 100 100 100 100 OCDD-'=C,; 200 200 200 200 200

Recovery Standards 1,2,3.4-TCDD-’’Ci2 100 100 100 100 100 1,2,3,7,8,9-HxCDD-^^Ci2 100 100 100 100 100

Enrichment Efficiency Standard 2,3,7,8-TCDD-^"Cl4 0.5 2 10 40 200

REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.

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