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Table 6. Concentrations and relative percent differences for pesticides detected in replicate samples <br />[µg/L, microgram per liter; <, less than; nc, not computed; GC/MS, gas chromatography/mass spectrometry; HPLC, high-performance liquid chromatography] <br />c <br />a <br />r <br />n <br />O <br />z <br />O <br />r <br />rn <br />x <br />O <br />v <br />N <br />a <br />z <br />0 <br />rn <br />N <br />c <br />r <br />Concentration Relative Concentration Relative Concentration Relative <br />Pesticide in replicates percent Pesticide in replicates percent Pesticide in replicates percent <br />(µg/L) difference (µg/L) difference (µg/L) difference <br />Acetochlor 0.008 13 <br />0.007 <br />0.017 <br />0.015 <br />0.014 5.7 - 25 <br />0.018 <br />Alachlor 0.003 40 <br />0.002 <br />0.022 9.5 <br />0.020 <br />0.031 <br />0.030 <br />0.031 0.0 - 6.7 <br />0.029 <br />0.110 <br />0.086 <br />0.083 3.6 - 28 <br />0.092 <br />Alachlor 0.031 9.2 <br />(continued) 0.034 <br />0.102 3.0 <br />0.009 <br />0.011 <br />0.011 <br />0.012 0.0 - 8.7 <br />0.011 <br />Atrazine 0.003 29 <br />0.004 <br />0.076 11 <br />0.068 <br />0.105 <br />0.106 <br />0.105 0.0 - 1.9 <br />0.104 <br />0.004 0.0 <br />0.004 <br />Atrazine 0.235 <br />(continued) 0.219 <br />0.216 0.0 - 8.4 <br />0.216 <br />0.019 5.1 <br />0.020 <br />0.127 <br />0.127 <br />0.123 0.0 - 3.2 <br />0.125 <br />0.083 <br />0.082 <br />0.079 1.2 - 9.6 <br />0.087 <br />0.011 0.0 <br />0.011 <br />Benfluralin 0.003 <br />0.004 <br />0.003 0.0 - 29 <br />0.004 <br />N <br />