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CV = (n rZh) (7 48 gals/ft3) where n = 314, r m the radius measured from the center of the well to the Inside surface of the well casing (feet), and h a the height of the column of water In rthe well from the bottom of the well to the water table (feet) A 1 3 Sample Withdrawal Water samples were collected from monitoring wells using disposable polyethylene bailers The bailers were disposed of after one use, thus requiring no decontaminating, therefore minimizing potential for cross contamination due to sampling devices Samples were collected in such a manner rthat agitation and exposure of the groundwater to the atmosphere was minimized Samples containers were filled by either pouring directly from the top of the bailer or by using a disposable attachment, which allows flow out of the bottom of the bailer by lifting up on the check valve One monitoring well was selected from which to collect a duplicate groundwater sample The duplicate sample was collected In the same manner as the primary sample, following collection of the primarysample The duplicate sample was submitted to the laboratory as a "blind"duplicate, that is, Its Identification did reveal which well It came from A separate Field Record of Water Sample form was completed for the duplicate sample, and included the identification of the monitoring well from twhich the duplicate sample was taken A 1 4 Sample Preservation and Handling "Certified clean" sample containers, supplied by the laboratory, were used during the collection of groundwater samples Sample handling procedures consisted of Analysis Container Quantit Preservation EPA 8015 Mod Amber 2-1 liter Cool WQ The samples were placed on Ice immediately following collection, and kept in coolers until delivered to the laboratory for analysis A-2 11DM_SAC 11SYSIWORDPRocsac1044misc19809_06 doc DAMES&MOORE