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casing volume. Once the well is purged and indicator <br /> parameters have stabilized, a sample will <br /> beafcollected <br /> i itial after <br /> the water level approaches 8o pe <br /> elevation. Where water level recovery is slow, the sample <br /> will be collected after stabilization is achieved and enough <br /> water is present to fill sample containers. <br /> Cross contamination from transferring pumps (or bailers) <br /> from well to well will be avoided by utilizing dedicated <br /> equipment. y"lere this is not feasible, thorough cleaning of <br /> equipment will be performed between sampling rounds. <br /> sampling will proceed from the Icast contaminated to the <br /> most contaminated well, if information is available before <br /> sample collection, or if it is indicated by field evidence. <br /> Where several given wells individual <br /> 1 e performed idual samples w ll becollectedino the <br /> following order: <br /> 1. volatile organics <br /> 2. purgeable organic carbon <br /> 3. Purgeable organic halogens <br /> 4. Total organic carbon <br /> 5. Total organic halogens <br /> 6. Extractable organics <br /> 7. Total metals <br /> B. Dissolved metals <br /> 9. Phenols <br /> 10. Cyanide <br /> The specific analytical methods be utilized for the common <br /> volatile/semivolatile to analyses are shoran on Table 2. <br /> Groundwater samples will be collected with a teflon bailer <br /> with bottom emptying device. Duplicate samples will be <br /> transferred to vials or containers that meet Regional Board <br /> specifications (Table 1). Groundwater from the bailer will <br /> be transferred to the sample container by allowing the fluid <br /> to flow slowly along the sides of the vessel. All <br /> containers will be filled above the top of the opening to <br /> form a positive: meniscus. No head space should be present <br /> in the sample container once it is sealed. After the vial is <br /> capped it will be inverted to check for air bubbles. If <br /> bubbles are present the sample will be discarded and <br /> replaced. If it is possible <br /> sible t beol collect <br /> a sample <br /> mpl the field <br /> hout <br /> head space, the problem <br /> technician's sampling log. <br /> Immediately following sample collection, samples will be <br /> labeled and stored in an ice chest containing frozen <br /> chemical ice sealed in plastic bags. Sample labels will <br /> contain the following information.: date, time, project ID, <br /> sample ID, name of sampler and type of analysis. All <br /> samples will be transported under chainhin of-custody A protocol <br /> to a state certified laboratory with organic free water <br /> container filled in the laboratory 9 <br />