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•' xs - S - _ '" ' <br /> MEMO - <br /> y <br /> 6. ..... Preservatives are -required for some types of samples. Use <br /> specially prepared vials from GTL, marked as indicated <br /> F , below, or use the appropriate field procedure (SOP 12 for <br /> acidification). slake 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 pR 2 with sulfuric acid. Use <br /> vials with care and Seep 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 /> s 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 /> k chlorinated. volatiles, samples shall be preserved with <br /> v1 sodium thiosulfate. Use vials labeled "CONTAINS TNIOSULFATE". <br /> f 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 vasal. <br /> S. Carefully but quickly slip cap onto vial. Avoid dropping <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, invert vial and .tap against hand to <br /> see that there are no brbbles inside. I <br /> 10, . Label vial using indelible ink as follows: <br /> a) Sample I.D. No. (and "Groundwater Technology" if <br /> s � not on preprinted label). <br /> L <br /> C) Date and Time. <br /> d) Type of analysis requested. <br /> # e) Your name. <br /> y^. _ GROUNDWATER <br /> :r .. TECHNOLOGY,INC. ' <br /> i CONSULTING GROUNDWATER GEOLOGISTS <br /> i <br /> f <br />