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For sampling chlorinated drinking water supplies for chlorinated volatiles, samples shall <br /> be preserved with sodium thiosulfate Use vials labeled "CONTAINS THIOSULFATE " 0/ <br /> No particular cautions are necessary <br /> 7 Fill vial to overflowing with water, avoiding turbulence and bubbling as much as <br /> possible Water should stand above lip of vial <br /> 8 Carefully, but quickly, slip cap onto vial Avoid dropping the Teflond septum from cap <br /> by not inverting cap until it is in contact with the vial Disc should have Teflond face <br /> toward the water Also avoid touching white Teflo0 face with dirty fingers <br /> 9 Tighten cap securely, invert vial, and tap against hand to see there are not bubbles <br /> inside. <br /> 10 Label vial, using indelible ink, as follows <br /> A Sampie i D No <br /> B Job I D No. <br /> C Date and Time <br /> D. Type of analysis required <br /> E. Your name <br /> 11 Unless the fabric-type label is used, place Scotch"` tape over the label to preserve its <br /> integrity. <br /> 12. F& chain=of-custody reasons, sample vial should-be wrapped end--for-end with Scotch" <br /> tape_or evidence=tape_and_signed with_in deli ble_ink=where=the end-of_the-tape seals on <br /> itself The septum needs to be covered. <br /> 13 Chill samples immediately. Samples to be stored should be kept at 4' Celsius (C) <br /> (39.2' Fahrenheit (FI) Samples received at the laboratory above 10'C (as measured at <br /> glass surface by a thermocouple probe), after overnight shipping, will be considered <br /> substandard, so use a high quality cooler with sufficient ice or freezer packs <br /> 14 Fill out Chain-of-Custody Manifest and Analysis Request Form (see Chain of Custody <br /> Procedures, SOP 11) <br /> CONCORD SOP W1141 PeCe 2 of 2 <br /> 1�_I! GROUNDWATER <br /> a_. <br /> �`� TECHNOLOGY, INC. <br />