ARCHIVED REPORTS XR0009904 - Laserfiche WebLink

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Corrective Action Plan Page 40 Sampling Procedure Prior to recoveryof groundwater sample from a a g►' p well, the well will be purged of a minimum of 10 casing volumes The purge water be temporarily held in a 50-gallon steel drums Samples will be recovered from each monitoring well to be sampled using a dedicated bailer which will be suspended in the well casing when not in use Water brought to the surface in the bailers will be decanted so as to completely fill clean glassware supplied by the laboratory The sample vials will then be tightly closed, labeled for identification, entered into chain-of-custody control and packed on chemical ice for transport, within 24 hours, to a laboratory certified by the CEPA Following completion of sampling, the depth to groundwater in each monitoring well sampled will be re-measured and checked against the depth measured prior to the start of well purging This will provide information on well-recovery rates and indicate whether or not representative samples of groundwater are being recovered Sample Analyses Each water sample will be analyzed for the following suite of analytes Analyte Method of Analysis Total Petroleum Hydrocarbons EPA Method 5 03 0/8015 (as Gasoline) Benzene EPA Method 602 Toluene EPA Method 602 Ethyl Benzene EPA Method 602 Total Xylenes EPA Method 602 Disposal of Purge Water When the results of the analyses are available, the concentration of contaminants, if any, in the purge water held in the 50-gallon drums will be determined Clean water will be disposed to the municipal sewer and contaminated water will be decanted into a closed, 1000-gallon tank situated on the 152 East 11 th Street property and held there until sufficient has accumulated to render economic its disposal at a permitted treatment facility