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r <br /> . 6 Swale Cellestivn Encedum <br />' Groundwater samples are collected as follows <br /> • A 141ter Teflon bailer is lowered and partially submerged into the well water to <br />' collect a groundwater sample <br /> • If visible PSH is present in the sample bailer, PSH thickness is recorded on the <br /> field Iog, and no sample ns collected for laboratory analysts <br /> • For volatile organic analyses,groundwater samples are collected in chilled., <br /> 40-milliliter,VOA vials having Teflon-lined caps Hydrochloric acid preservative <br /> is added to all vials by the laboratory to lower sample pH to 2 Samples are held <br /> at 2 to 4°Celsius while in the field and in transit to the laboratory Other <br /> Iappropriate containers, preservatives, and holding protocols are used for <br /> non-volatile analyses <br /> • VOA vials are filled completely so that no headspace or air bubbles are present <br />' within the vial Care is taken so that the vials are not overfilled and the <br /> preservative is not lost <br /> • Sample containers are immediately labeled and sealed after collection to prevent <br /> I confusion For VOA vials, the label is placed to overlap the edge of the cap as a <br /> custody seal, unless a separate custody seal is being used <br /> • Samples are stored in a cooler while on site and in transport to the laboratory or <br />' office The cooler has sufficient ice to maintain appropriate temperature prior to <br /> collecting samples The VOA vials are kept cool both pnor to and after filling <br /> Hot or warm containers are not used when volatile compounds are the target <br /> analytes <br /> Ruffitafflination PrOeWOM <br /> Decontamination of monitoring and sampling egwpment is perfonvied prior to all <br /> monitoring and sampling activities Decontamination procedures utilize a three--step process as <br /> Idescribed below <br /> • The initial decontamination is performed using a non-phosphate soap, such as <br />' Sample Green or Alconox,in tap water in a 5-gallon bucket A soft-bnstle <br /> bottlebrush is used to thoroughly clean the inside and outside of the equipment_ <br /> • A second 5-gallon bucket of tap water is used as a first rinse <br />' • A third 5-gallon bucket of deionized water is used as a final rinse <br /> • The brush is used in the first bucket only, it does not travel from bucket to bucket <br /> with the equipment This minimizes any transport of the contaminants that should <br />' stay in the first bucket <br /> f <br /> I <br />