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• 6 <br /> • . 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 rote 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 •rinyl goives are required for <br /> handling. Samples designated for expedited service and <br /> r 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 /> 1 f, <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 /> Rina 7 . Fill vial to overflowing with water, avoiding turbulence and <br /> ` bubbli•.7g �Rs much as possible. Water should stand above lip <br /> .� of vial. <br /> 8 . Carefully but quickly slip cap onto vial . Avoid dropping <br /> _w <br /> the teflon disc from cap 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, invertvial and tura 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 /> GROUNDWATER <br /> TECHNOLOGY,INC <br /> `"` CONSULTING GROUNDWATfoq GIMLOGIS'S <br />