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Weck Laboratories, Inc. <br /> Analytical LFiborltory SGrviee - Since. 1964 <br /> Certificate of Analysis <br /> Week Laboratories,Inc <br /> Organophosphorus Pesticides by EPA Method 8141A-Quality Control <br /> Sample QC Spike %REC RPD <br /> Result Result Qualifier Units Level %REC Limits RPD Limit <br /> Analvie <br /> Batch W8D0253-EPA 3520B <br /> LCS lit(W8D0253=BBSD1) _ _ _ Prepared_04/07/08 Analyzed 04/17/08 <br /> Dichlorvos............................................... 0.927 ug/l 1.00 93 29-164 4 25 <br /> DisulfOton............................................... 0.819 us/I I00 82 46-155 12 25 <br /> Ethoprop................................................. 1.00 ug/l 1.00 100 54-141 11 25 <br /> Fensulfothion.......................................... 1.13 Q-12 ug/l 1.00 113 54.167 32 25 <br /> FM <br /> nthion.................................................. 0.916 118/1 1.00 92 50-143 22 25 <br /> erphos.................................................. 0.920 ug/l 1.00 92 40-185 12 25 <br /> ethyl parathion................................... 0.956 ug/1 1.00 96 47.142 13 25 <br /> 1vMevillphos........................._ ............... 0,991 ug/l 1.00 99 43-145 13 25 <br /> Naled....................................................... 0.891 ug/l 1.00 89 16-177 13 25 <br /> Phorate.................................................... 0.960 Usti 1.00 96 56-134 10 25 <br /> Ronnel..................................................... 0.908 ug/1 1.00 91 49-140 15 25 <br /> Stirophos................................................. 0.940 Q-12 ug/I 1.00 94 46-146 26 25 <br /> Tokuthion(Prothiofos).............-............ 0.847 ug/I Loo 85 52-139 It 25 <br /> Trichloronate.......................................... 0.851 ug/I 1.00 85 52-136 11 25 <br /> Lab#:8040302 <br /> Page 6 of 7 <br /> 14859 East Clark Avenue,City of Industry,California 91745-1396 (626)336-2139 FAX (626)336-2634 r� <br /> w,."v.wecklabs.com 3`/ <br />