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and seal septum onto the vial with lid , teflon side <br /> ( shiny) toward the sample. shake sample enough to <br /> break it up so that whole sample is immersed in <br /> methanol . The rapid progression of steps indicated <br /> here is necessary to prevent loss of volatiles from <br /> the soil . Do not leave vials unopened for any <br /> extended period - the methanol evaporates quickly. <br /> Grit left on threads of vial can cause vial to break . <br /> F. * If required ( see 5 below) . Take a duplicate <br /> sample from the other half directly across from the <br /> first sample, or where ever undisturbed, yet <br /> representative soil occurs . <br /> G. Label vial with legible information as follows : <br /> 1 . Job name or number . <br /> 2 . Date. <br /> 3 . Time. <br /> 4 . Depth and well number. <br /> 5 . Samplers initials . <br /> H. Tape vial across septum with scotch tape and around <br /> cap and sign on the tape with indelible ink to <br /> prevent tampering. <br /> I . Wrap up a representative section of the core equiva- <br /> lent in volume to cube 3 cm on a side in the aluminum <br /> foil square, discarding the rest appropriately. Seal <br /> in saran wrap. This section is for dry weight <br /> determination . Close it in plastic bag with a tag or <br /> write on the bag with an indelible marker. These <br /> samples go into a separate cooler or box and not with <br /> the vials . The cooler for dry weight samples need <br /> not be iced , but overnight delivery is requested. <br /> J. Discard plastic coring syringe, clean the spatula , <br /> and get clean equipment ready for next sample. <br /> K. Ice the sample vials immediately and keep them iced <br /> through shipment. <br /> L. Fill out chain of custody form. SOP 11 gives major <br /> details . Make sure sample requests is for proper <br /> analysis type. <br />