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16 <br /> where CV = (rr rzh) (7 48 gals/ft') <br /> TT 3 14, <br /> r = the radius measured from the center of the well to the inside surface <br /> 1of the well casing (feet), and <br /> h = the height of the column of water standing in <br /> the well (feet) <br /> A 1 3 Sa[Dple Withdrawal <br /> Water samples were collected ected from monitoring wells using disposable polyethylene bailers <br /> The bailers were disposed of after one use, thus requiring no decontaminating, therefore mini- <br /> mizing potential for cross contamination due to sampling devices Samples were drawn and <br /> collected in such a manner that agitation and exposure of the groundwater to the atmosphere was <br /> minimal Sample containers were filled by either pouring directly out of the top of the bailer or by <br /> using a disposable attachment which allows flow out of the bottom of the bailer by lifting up on the <br /> check valve <br /> A 1 4 Sample and Ha dling, <br /> Sample containers were supplied certified clean from the laboratory Handling procedures <br /> were <br /> Procp,durei ti Preservalion <br /> EPA 8015 Mod Amber 2-1 liter Cool 4'C <br /> The samples were placed on ice and kept in coolers until delivered to the laboratory for <br /> analysis <br /> Al 5 FL <br /> eld-Analy5is <br /> The pH, electrical conductivity and temperature of the groundwater were measured in <br /> the field during the purging of the wells at the time of sample collection The meters used for <br /> measuring these parameters were calibrated at least once per day prior to their use in the field <br /> according to the instructions provided with the instrument Field measurements were <br /> R\5AC1044MI5C19610 04A WPD A-2 <br /> r <br />