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. I i pre-cleaned prior to use unless they have been factory sealed in plastic sleeves, and are opened immediately prior to use in the field. Bailers will be lowered into the well with new lengths of polypropylene rope or Teflon coated wire which is capable of being decontaminated. Care will be taken to gently lower the bailer into the water to minimize turbulence, aeration, or degassing of the well water. ! Sample containers will be held in a covered storage area until used, and only opened immediately prior to filling. Prior to sampling, sampling personnel will put on new, clean, latex, surgical gloves to avoid sample or container contamination. The water in the bailer will be slowly dispensed into the sample bottle(s) using a bottom emptying device on the bailer to minimize aeration of the water. All sample containers will be filled completely to the top of the bottle and.sealed with zero head space. The bottles will be immediately labeled, logged, placed in ziplock bags, and stored in a pre-cooled i ice chest pending delivery to the laboratory. When possible, wells shall be sampled in order from least to most contaminated. Samples from wells with observable floating product will not be analyzed for dissolved i phase constituents, however,the thickness of the floating product layer will be noted on j the purging and sampling log, if possible. A chain of custody form will be completed in the field and accompany all samples submitted to the laboratory. Sample Numbering. Unless otherwise specified in the work plan or drilling and sampling plan for this project,groundwater samples will be numbered with the well number followed by a'W' and a number designation (i.e. TV-1-W1, TV-]-W2, etc.). During sample collection, all samples will be labeled and properly packed for shipment. At a minimum,sample labels shall include ERG's job number,job name, sample number, date, initials of the person collecting the samples, and time collected. i i I Samples will be contained in sealed, clear,plastic zip-lock bags with all sample labels and identifiers easily visible. Samples will be packed and shipped in coolers pre-chilled to 4 degrees Centigrade. Temperature will be maintained using dry ice or conventional ice in double plastic bags. Adequate sample protection during shipment will be ensured by surrounding samples with vermiculite, foam pieces, foam rubber, or some comparable i packing material, as required for protection during shipment. j l