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6. .._.. Preservatives are I:equired for some types of samples. Use <br /> spe_ially prepared vials from GTL, marked as indicated <br /> below, or use the 4ppropriate 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 /> Vor :samples from dissolved gasoline sites or other samples <br /> shoudl be acidified below pa 2 with sulfuric acid. Use <br /> Jvials 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. mash 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 THIOSULPATE". <br /> No particular cautions are necessary. <br /> i <br /> 7. Fill vial to overflowing with water, avoiding turbulence and <br /> bubbling as much as possible. Water should stand above lip <br /> -~ of -vial. <br /> 8. 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 /> f fingers. <br /> 9. Tighten cap securely, invert vial and tap against hand to <br /> see that there are no bubbles inside. <br /> 10. Label viral using indelible ink as follows: <br /> f�f a) Sample T.D. No. (and "Groundwater Technology" if <br /> p, not on preprinted label). <br /> b) Job I.U. No. <br /> c) Date and Time. <br /> d) Type of analysis requested. <br /> e) Your name. <br /> i <br /> 4 <br /> f <br /> GROUNDWATER <br /> j <br /> TECHNOLOGY.INC. <br /> CONSULTING GROUNDWATER GEOLOGISTS <br /> f <br />