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Weck Laboratories; Inc. Analytical Laboratory Services - Since 1964 ! Certificate of Analysis Week Laboratories, Inc Organophosphorus Pesticides by EPA ]Method 8141A-Quality Control Sample QC Spike °�oK$C RPD RPD ! Analvte Result Result Qualifier Units Level %REC emits Limit Batch W8130287-FPA 352013 - LCS Dup(NV8B0287 BSD1)_ _ -_ _ __ Preaared:ODOSLO.8_Anala vied:02/ _12/08 Coumaphos...................................... 0.886 ug/l 1.00 89 42-161 11 25 Demeton-o....................................... 0.793 ug/1 1.00 79 47-132 10 25 ! 0.841 ug/l 1.00 84 45-147 4 25 Diazinon............. ......................... ... 0.808 ug/l IM 81 46-136 8 25 Dichlorvos....................................... 1.02 ug/l 1.00 102 29-164 16 25 Disulfoton........................................ 0.821 ug/l 1.00 82 46-155 8 25 Ethoprop.......................................... 0.911 ug/l 1.00 91 54-141 10 25 Fensulfothion................................... 1.08 ug/l 1.00 108 54-167 10 25 Fenthion........................................... 0.969 ug/l 1.00 97 50-143 10 25 Merphos........................................... 0.967 ug/l 1.00 97 40-185 0.2 25 Methyl parathion.............................. 0.710 ug/l 1.00 71 47-142 8 25 Mevinphos....................................... 1.05 ug/l 1.00 105 43-145 10 25 Naled................................................ 0.890 ug11 1.00 89 16-177 6 25 ! Phorate............................................. 0.873 ug/l 1.00 87 56-134 8 25 Ronnel.............................................. 0.852 ug/l 1.00 85 49-140 14 25 Stirophos.......................................... 0.920 ug/l 1.00 92 46-146 8 25 Tokuthion(Prothiofos).................... 0.910 ug/l 1.00 91 52-139 7 25 ! Trichloronate................................... 1.08 ug/1 1.00 108 52-136 14 25 ! ! Lab4:8020685 Page 7 of7 14859 East Clark Avenue,City of Industry,California 91745-1396 (626)336-2139 FAX (626)336-2634 www.weeklabs.com !