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' r <br /> %WOO <br /> 6 . .... Preservatives are required for some types of samples. Use <br /> specially prepared vials from GTL, marked as indicated <br /> below, or use the appropriate field procedure (SOP 12 for <br /> acidification ) . Make note on forms that samples were <br /> preserved. Always have extra vials in case of problems. <br /> For samples from dissolved gasoline sites or other samples <br /> shoudl be acidified below pH 2 with sulfuric acid. Use <br /> vials with care and keep them upright. Eye protection, foot <br /> protection, and disposable vinyl golves are required for <br /> handling. Samples designated for expedited service and <br /> analyzed within seven (7 ) days of sampling will be accept- <br /> able without preservation. <br /> Acid causes burns. Glasses or goggles (not contacts ) are <br /> necessary for protection of the eyes . Wash eyes with fresh <br /> water for 15 minutes if contact occurs and seek medical <br /> attention. Rinse off hands frequently with water during <br /> handling. <br /> For sampling chlorinated drinking water supplies for <br /> chlorinated volatiles , samples shall be preserved with <br /> sodium thiosulfate. Use vials labeled "CONTAINS THIOSULFATE" . <br /> No particular cautions are necessary. <br /> 7 . Fill vial to overflowing with water, avoiding turbulence and <br /> bubbling as much as possible. Water should stand above lip <br /> of vias. <br /> 8 . Carefully but quickly slip cap onto vial.. Avoid dropping <br /> the teflon disc from can by not inverting cap until in <br /> contact with vial. Disc should have teflon face toward the <br /> water. Also avoid touching white teflon face with dirty <br /> fingers. <br /> 9 . Tighten cap securely, invert vial and tap against hand to <br /> see that there are no bubbles inside. <br /> 10 . Label vial using indelible ink as follows : <br /> a ) Sample I.D. No. (and "Groundwater Technology" if <br /> not on preprinted label) . <br /> . b) Job I.D. No. <br /> c ) Date and Time. <br /> d ) Type of analysis requested. <br /> e) Your name.. <br /> IGROUNDWATER <br /> TECHNOLOGY,INC. <br /> CONSULTING GROUNDWATER GEOLOGISTS <br />