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The samples should be collected with as little agitation or disturbance as possible. The vial <br /> should be filled so that there is a meniscus at the top of the vial and absolutely no bubbles or <br /> headspace should be present in the vial after it is capped. After the cap is securely tightened, <br /> the vial should be inverted and tapped on the palm of one hand to see if any undetected <br /> bubbles are dislodged. If a bubble or bubbles are present, the vial should be topped off using a <br /> minimal amount of sample to re-establish the meniscus. Care should be taken not to flush any <br /> preservative out of the vial during topping off. If, after topping off and capping the vial, bubbles <br /> are still present, a new vial should be obtained and the sample re-collected. <br /> Teflon or Teflon-lined polyethylene tubing are preferred when sampling is to include VOCs. If <br /> tubing constructed of other materials is to be used, the substituted materials must not leach <br /> contaminants nor cause interferences to the analytical procedures to be used. <br /> B.14.2. Special Precautions for Trace Contaminant Groundwater Sampling <br /> • A clean pair of new, non-powdered, disposable gloves will be worn each time a different <br /> location is sampled and the gloves should be donned immediately prior to sampling. The <br /> gloves should not come in contact with the media being sampled and should be changed <br /> any time during sample collection when their cleanliness is compromised. <br /> • Sample containers for samples suspected of containing high concentrations of <br /> contaminants shall be stored separately. <br /> • Sample collection activities shall proceed progressively from the least suspected <br /> contaminated area to the most suspected contaminated area if sampling devices are to be <br /> reused. Samples of waste or highly contaminated media must not be placed in the same <br /> ice chest as environmental (i.e., containing low contaminant levels) or background <br /> samples. <br /> • If possible, one member of the field sampling team should take all the notes and <br /> photographs,fill out tags, etc., while the other members collect the samples. <br /> • Clean plastic sheeting will be placed on the ground at each sample location to prevent or <br /> minimize contaminating sampling equipment by accidental contact with the ground <br /> surface. <br /> • Samplers must use new, verified certified-clean disposable or non-disposable equipment <br /> cleaned according to procedures contained in SESD Operating Procedure for Field <br /> Equipment Cleaning and Decontamination (SESDPROC-205) or SESD Operating Procedure <br /> for Field Equipment Cleaning and Decontamination at the FEC (SESDPROC-206) for <br /> collection of samples for trace metals or organic compound analyses. <br /> B.14.3. Sample Handling and Preservation Requirements <br /> 1. Groundwater samples will typically be collected from the discharge line of a pump or from <br /> a bailer, either from the pour stream of an up-turned bailer or from the stream from a <br /> bottom-emptying device. Efforts should be made to reduce the flow from either the <br /> pump discharge line or the bailer during sample collection to minimize sample agitation. <br /> Daub&Associates, Inc. Page B-32 Natural Soda LLC 2022 SAP <br />