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�" �". � m-»v `c��'.„,,.,•, �l� ,ate-..�'Ka` ���� ��� „— am � ,. °' <br /> � ,� -�+'.1r.�.r?+a s.�s � f F` ,*'4 .�i" '�.. zk'" u..c..'r°,. r.�i•".. rc ,� (Y;- t- F. �wc...�" tib. �, r'`} �` Jd?. -a<.c• <br /> a' <br /> ra <br /> 6T ffiiVlltoma NTAL LAORATORX (GTEL) <br /> STANDARD OPERATING PROCEDURE <br /> COXA RNING SAMPLING FOR VOLATITZS IH NATER (DISSOLVED GASOLINE, <br /> SOLVENTS, ETC.) . <br /> .. GOP 10 <br /> I. 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 /> .. 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 vashed with laboratory detergent <br /> solution, as above. Visible deposits may have to be removed <br /> h>> with hexane. Solvent washing should be followed be <br /> detergent washing as above. <br /> 4,a 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 /> 1' pesticide grade isopropyl alcohol, followed by overnight or <br /> oven drying, will be necessary. <br /> 3. Take duplicate sAmpler for GTEL. Mark on firms as a single <br /> sample with two conta_ iera to avoid duplication of analysis. <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 /> the project manager, <br /> 5. Fill out labels and forms as much as possible ahead of <br /> t <br /> -- time. Use an indelible marker. <br /> TrcH1,111+1k;l I%L <br />