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a teflon bailer equipped with a sampling port which <br /> allows the sample to be delivered into a 40 ml glass <br /> VOA vile to minimize volatilization. <br /> 1. Preservation - Besides blue ice to keep water <br /> samples at 4 Deg. C, EPA 602 volatiles (also TPG <br /> G) are further preserved by the addition of 4 <br /> drops of concentrated HC1 to the VOA vile before <br /> the sample is taken to insure that a pH of < 2 is <br /> maintained. If free chlorine is detected in the <br /> water, all volatile and semi-volatile organics <br /> samples are preserved with 0 . 008% Na2S203. <br /> E. Containers <br /> 1 . Soil (volatile 8 non-volatile constituents) Soil <br /> tubes are thin-walled brass. Tubes are washed in <br /> Alconox, rinsed in distilled water, rinsed in <br /> acetone, air dried and then baked for 1 hour at <br /> 105 Deg. C. <br /> 2 . Water (non-volatile constituents) - 500 or 1000 ml <br /> brown glass with teflon lined screw lids. These <br /> bottles are prepared in the same manner as the <br /> brass tubes described above. <br /> 3 . Water (volatile constituents) - 40 ml VOA vials - <br /> We purchase "certified" clean vials. They are <br /> used only once and then discarded. In addition, <br /> we do our own internal quality control on each box <br /> of vials to insure that there are no interfering <br /> volatiles present. <br /> 3 <br />