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1 <br />' [7wdnyand Srreys TsJ~ (USr) - Gw~wre Sonpru~61'rumc'd <br />10. Addition samples wn11 then be obtained by subsequent balling of the well and <br />placement into appropriate containcn. Samples wtll be obtained in the <br />following order. <br />A Volatiles <br />B. Semi-volanles , <br />' C Metals or Non-volatiles <br />Decontamination Procedures <br />All equipment that will be used for monitoring or sampling wt71 be decontaminated <br />' prior to the entry of that equipment into each monitor well. This wt11 be done to eliminate <br />the possbtliry of cross-contamination between wells. Only new rope or twine wIIf be used <br />at each well, for each activity. This protocol is designed to be used at UST sites specifically <br />' and may not apply to other sites, without modification. <br />UST sites typically involve the analysis for volatile organic compounds, especially <br />' benzene, toluene, ethylbenzene, and xylenes (BTE7~. These constituenu have very low <br />regulatory action levels in the pare per billion (PPB) range, and thus laboratory analytical <br />' detection limiu are in the low PPB range. Another common analysis is total volatile <br />hydrocarbons (TVH). This analysis involves summing and reporting all volatile constituents. <br />Laboratory detection limits are usually in the pan per million (PPM) range. <br />' Analyses for non-volanle organic constituenu include total extractable hydrocarbons <br />(TEH), and oil and grease. <br />' Decontamination of reusable sampling media including purge batters, water level <br />indicators, pumps, etc. is accomplished through the use of preliminary domestic tap water <br />' rinses, non-phosphate detergent solution washes, and final tap water rinses. ]n Greystone's <br />experience, and through the analysis of decontamination blanks this decontamination process <br />ensures that the integrity of samples is maintained. This procedure stresses the repeated »se <br />of copius amounts of rinsing and washing solutions. <br />Reusable Bailer <br />1. Remove the bat7er rope. <br />' 2 Use a hose and tap water to rinse the outride of the bat7er whsle scrubbing <br />with your hands or a clean bntsh. <br />J <br />-5- Aooocd 70/l3N1 <br /> <br />