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rs M-MI-1 <br /> C� <br /> GT MMIRON3+IENTAL LABORATORY (GTEL) <br /> STANDARD OPERATING PROCEDURE <br /> CONCERNING SAMPLING FOR VOIALTIIES IN MATER (DISSOLVED G.Jk 3LINE, <br /> SOLVENTS, ETC.) . <br /> SOP 20 <br /> 1. Use Only vials properly washed and baked, available from <br /> GTEL or I-Chem. <br /> 2. Use clean sampling. Qquipment. Scrub with Alconox or <br /> equivalent laborato.v detergent and ?nater followed by a <br /> thorough water rinse; Complete with a distill-ad water <br /> rinse. <br /> Sampling equipment which has come into contact with liquid <br /> hydrocarbons (free product) should be regarded -with suspi- <br /> cion. Such equipment should have tubing and cables replaced <br /> and all resilient parts washed with laboratory detergent <br /> "- solution, as above, Visible deposits may have to be removed <br /> with hexane. Solvent washing should be followed be <br /> detergent washing as above. <br /> This procedure is valid for volatile organics analysis <br /> only. For extractable orgaizics (for example, pesticides, or <br /> base neutrals for EPA method 625) a final rinse with <br /> pesticide grade isopropyl alcohol, followed by overnight or <br /> oven drying, will be necessary. <br /> 3. Take duplicate samples for GTEL. Mark on forms as a single <br /> sample with two containers tc avoid duplication of analysis. <br /> 4. Take a site blank using distilled water or known uncontami- <br /> nated source. This sample kill be run at the discretion of <br /> the project manager. E <br /> 5. Fill out labels and forms. as much as possible ahead ox <br /> time. Use an indelible marker. <br /> f <br />