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1 <br /> Weck Laboratories, Inc. <br /> Analytical Laboratory Services- Since 1964 <br /> Certificate of Analysis <br /> .'eek Laboratories, gne <br /> Organophosphorus Pesticides by EPA Method 8141A- Quality'Control <br /> Sample QC Spike BEC RPD <br /> % <br /> Analyte Result Result Qualifier Units Level %RFC gts RPD Limit <br /> Batch WSB0287-EPA 3520B <br /> Blank(W8130287-BLKl) _ _ _ Prepared_02/08/08._Analyzed:02/12/08 <br /> Mevinphos....................................... ND ug/l <br /> Naled................................................ ND ug/l <br /> Phorate............................................. ND ug/I <br /> Ronnel.............................................. ND ug/l <br /> Stirophos.......................................... ND ug/l <br /> Tokuthion(Prothiofos).................... ND og/I <br /> Trichloronate................................... ND ug/l <br /> Thionazin......................................... ND ug/l <br /> Dimethoate....................................... 0.108 1 ug/l <br /> Malathion......................................... ND ug/I <br /> Ethyl parathion................................. ND ug/l <br /> LCS(W8B0Z87.-BSjj. -Prepared:02/08/08 Analyzed 02/12/08 <br /> Surrogate:Triphenyl phosphate 0.896 ug/1 1.00 90 6-173 <br /> Azinphos methyl(Guthion).............. 0.806 ug/l 1.00 81 18-159 <br /> BOlstar.............................................. 0.755 ug/l 1.00 75 49-148 <br /> Chlorpyrifos..................................... 0.958 ug/I 1.00 96 49-143 <br /> COumaphos...................................... 0.795 ug/I 1.00 80 42-161 <br /> Demeton-o....................................... 0.715 ug/1 1.00 72 47-132 <br /> Demeton-s........................................ 0.809 ug/I 1.00 81 45-147 <br /> Diazinon........................................... 0.744 ug/1 1.00 74 46-136 <br /> Dichlorvos........................................ 0.872 ug/l 1.00 87 29-164 <br /> Disulfoton........................................ 0.760 ug/I 1.00 76 46-155 <br /> Ethoprop.......................................... 0.824 ug/I 1.00 82 54-141 <br /> Fensulfothion................................... 0.973 ug/l 1.00 97 54-167 <br /> Fenthion........................................... 0.878 ug/I 1.00 88 50-143 <br /> Merphos........................................... 0.965 ug/l 1.00 97 40-185 <br /> Methyl parathion.............................. 0.654 ug1l 1.00 65 47-142 <br /> Mevinphos....................................... 0.957 ug/I 1.00 96 43-145 <br /> Haled................................................ 0.842 ug/l 1.00 84 16-177 <br /> Phorate............................................. 0.809 ug/l 1.00 81 56-134 <br /> Ronnel.............................................. 0.741 ug/l 1.00 74 49-140 <br /> Stirophos.......................................... 0.853 ug/l 1.00 85 46-146 <br /> Tokuthion(Prothiofos).................... 0.852 ug/l 1.00 85 52-139 <br /> Trichloronate................................... 0.940 ug/1 1.00 94 52-136 <br /> LCS-Dup(W8B0287-BSDD__. ___ _ Prepared:02/08/08 Analyzed:02/12/08 <br /> Surrogate:Triphenyl phosphate 0.924 ug/l 1.00 92 6-173 <br /> Azinphos methyl(Guthion).............. 0.891 ug/l 1.00 89 18-159 10 25 <br /> Bolstar.............................................. 0.780 ug%I 1.00 78 49-148 3 25 <br /> Chlorpyrifos..................................... 1.07 ug/I 1.00 107 49-143 11 25 <br /> Lab#:8020685 Page 6 of <br /> 14859 East Clark Avenue,City of Industry,California 91745-1396 (626)336-2139 FAX (626)336-2634 <br /> www.wecklabs.com <br />