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' GT ZXVIRON?CENTAL LABORATORY (GTEL) <br /> STANDARD OPERATIXG PROCEDURE <br /> ODNCERNING SAMPLING FOR VOLATILES IN WATER (DISSOLVED QLSOLINE, <br />' BOLVENTS, RTC. ) . <br /> BOP 10 <br />' 1. Use -only vials properly washed and baked, available from <br /> GTEL or I-Chem. <br /> 2 . Use clean sampling equipment. Scrub with Alconox or <br />' equivalent laboratory detergent and water followed by a <br /> thorough water rinse. Complete with a distilled water <br /> rinse. <br /> 1 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 organics (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 to avoid duplication of analysis . <br /> I <br /> 4 . Take a site blank using distilled water or known uncontami- <br /> nated source . This sample will be run at the discretion of <br /> Ithe project manager. <br /> 5. Fill out labels and forms as much as possible ahead of <br /> time . Use an indelible marker. <br /> I <br /> Ir G+� �i �iti�al►►r <br /> TtLH\����'�� 1.L <br />