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GT ENVIRONMENTAL LABORATORY(GTEL) <br /> STANDARD OPERATING PROCEDURE <br />' CONCERNING SAMPLING FOR VOLATILES IN WATER (DISSOLVED GASOLINE, SOLVENTS, ETC ) <br /> SOP '10 <br />' 1. Use only vials properly washed and baked, available from GTEL or I-Chem <br /> 2 Use clean sampling equipment. Scrub with Alconox or equivalent laboratory detergent and water <br />' followed by a thorough water rinse. Complete with a distilled water rinse <br />' Sampling equipment which has come Into contact with liquid hydrocarbons (free product) should <br /> be regarded with suspicion Such equipment should have tubing and cables replaced and all <br /> resilient parts washed with laboratory detergent solution, as above Visible deposits may have to <br /> be removed with hexane Solvent washing should be followed with detergent washing as above <br />' This procedure is valid for volatile organics analysis only For extractable organics (for example, <br /> pesticides, or base neutrals for EPA method 625) a final rinse with pesticide grade isopropyl <br />' alcohol, followed by overnight or oven drying, will be necessary <br /> 3 Take duplicate samples for GTEL Mark on forms as a single sample with two containers to avoid <br /> duplication of analysis <br /> 4 Take a site blank using distilled water or known uncontaminated source This sample will be run <br /> at the discretion of the project manager <br /> I <br /> 5 Fill out labels and forms as much as possible ahead of time Use an Indelible marker. <br /> 6 Preservatives are required for some types of samples Use specially prepared vials from GTEL, <br /> Imarked as Indicated below, or use the appropriate field procedure (SOP 12 for acidification) <br /> Make note on forms that samples were preserved Always have extra vials in case of problems <br /> Samples for volatile analysis should be acidified below pH 2 with hydrochloric acid Use vials with <br /> care and keep them upright Eye protection, foot protection, and disposable vinyl gloves are <br /> required for handling Samples designated for expedited service and analyzed within seven (7) <br /> days of sampling will be acceptable without preservation <br /> Acid causes bums Glasses or goggles (not contact lenses) are necessary for protection of the <br /> eyes Flush eyes with water for 15 minutes If contact occurs and seek medical attention Rinse <br /> off hands frequently with water during handling <br /> GRouNDWAT£R <br /> �_ TECHNOLOGY, INC <br />