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WIII ..L. Weck Laboratories, Inc. <br />Analytical Laboratory Service - Since 1964 <br />Certificate of Analysis <br />Quality Control Section <br />Aldehydes by EPA Method 8315A - Quality Control <br />Batch W3H1145 - EPA 8315A <br />Blank (W3H1145-BLK1) Prepared: 08/23/13 Analyzed: 08/24/13 15:31 <br />Sample QC Spike %REC RPD <br />Analyte Result Result Qualifier Units Level %REC Limits RPD Limit <br />Formaldehyde ND mg/kg <br />LCS (W3H1145-BS1) Prepared: 08/23/13 Analyzed: 08/24/13 15:31 <br />Sample QC Spike %REC RPD <br />Analyte Result Result Qualifier Units Level %REC Limits RPD Limit <br />Formaldehyde 1.08 mg/kg 2.00 54 53-162 <br />Matrix Spike (W3H1145-MS1) Source: 31113092-04 Prepared: 08/23/13 Analyzed: 08/24/13 15:31 <br />Sample QC Spike %REC RPD <br />Analyte Result Result Qualifier Units Level %REC Limits RPD Limit <br />Formaldehyde ND 1.58 mg/kg 2.00 79 19-197 <br />Matrix Spike Dup (W3H1145-MSD1) Source: 31113092-04 Prepared: 08/23/13 Analyzed: 08/24/13 15:31 <br />Sample QC Spike %REC RPD <br />Analyte Result Result Qualifier Units Level %REC Limits RPD Limit <br />Formaldehyde ND 1.54 mg/kg 2.00 77 19-197 3 20 <br />3H13092 Page 3 of 4 <br />Weck Laboratories, Inc 14859 East Clark Avenue, City of Industry, California 91 745-1 396 (626) 336-2139 FAX (626) 336-2634 <br />www.wecklabs.com