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GROUNDWATER TECHNOLOGY, INC. <br /> STANDARD OPERATING PROCEDURE NO. 10 <br /> SAMPLING FOR VOLATILES'IN WATER (DISSOLVED GASOLINE, SOLVENTS, ETC.) <br /> 1. Use only vials property washed and oven dried (prepared by the laboratory). <br /> 2. Use clean sampling equipment. Scrub with Alconox or equivalent laboratory detergent <br /> • <br /> and water followed by a thorough water rinse. Complete with a distilled water rinse. <br /> Sampling equipment which has come into contact with liquid hydrocarbons (free <br /> product) should be regarded with suspicion. Such equipment should have tubing and <br /> cables replaced and all resilient parts washed with laboratorydetergent solution as <br /> • indicated above. Visible deposits may have to be removed with hexane. Solvent <br /> washing should be followed by detergent washing, as indicated above. <br /> This procedure is valid for volatile organic analysis only. For extractable organics (for <br /> example, pesticides, or base neutrals for U.S. Environmental Protection Agency (EPA] <br /> • Method 625 a final rinse with pesticide-grade isopropyl alcohol), followed by overnight <br /> or oven drying will be necessary. <br /> 3. Take duplicate samples. Mark on forms as a single sample with two containers to avoid <br /> duplication of analyses. <br /> 4. Take a site blank using distilled water or known uncontaminated source. This sample <br /> will be run at the discretion of the project manager. <br /> 5. Fill out labels and forms as much as possible ahead of time. Use an indelible marker. <br />• <br /> 6. Preservatives are required for some types of samples. Use specially prepared vials <br /> marked as indicated below, or use the appropriate field procedure (SOP 12 for <br /> acidification). Make note on forms that samples were preserved. Always have extra <br />• vials in case of problems. Samples for volatile analyses should be acidified below pH 2. <br /> Eye protection, foot protection, and disposable vinyl gloves are required for handling. <br /> Samples designated for expedited service and analyzed within seven (7) days of <br /> sampling will be acceptable without preservation. Glasses or goggles (not contact <br /> lenses) are necessary for protection of the eyes. Flush eyes with water for 15 minutes <br />• if contact occurs and seek medical attention. Rinse off hands frequently with water <br /> during handling. <br />• <br /> CONCORO.SOP 1216141 Pope 1 of 2 ' <br /> i�l GROUNDWATER <br /> L--] TECHNOLOGY, INC. <br />