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g <br /> •'S <br /> casing volume. once the well is purged and indicator <br /> parameters have stabilized, a sample will be collected atter <br /> the water level approaches ,80 percent o€ its <br /> elevation. Where water level recovery is slow, the sample <br /> will be collected tafter <br /> stabilization is achieved and enough <br /> water is present <br /> Cross contamination fs. <br /> rom transferring pumps (or bailers) <br /> :from well to well will be avoided by utilizing dedicated <br /> equipment. Where this is not feasible, thorough cleaning of <br /> between <br /> equipment will be performed sampling rounds. <br /> Sampling will proceed from the least contaminated to the <br /> most contaminated well, if information is afield evidenceable s <br /> sample collection, r of analysis it is indicated <br /> be performed for a <br /> Where several types <br /> given well, individual samples will be collected in the <br /> following order: <br /> 1. Volatile organics <br /> 2, purgeable organic carbon <br /> 3. purgeable organic halogens <br /> q„ Total organic carbon <br /> 5. Total organic halogens <br /> 6. Extractable organics <br /> 7• Total metals <br /> 8• Dissolved metals <br /> g• Phenols <br /> 10. Cyanide <br /> The specific analytical methods be utilized for the common <br /> volatile/semivolatile to analyses are hown on Table 2. <br /> s <br /> lle <br /> Groundwater samples will be coc Duplicatebailer <br /> samples swi 1 be <br /> with bottom emptying device' <br /> transferred to vials or containers that meet Regional Board <br /> specifications (Table 1). Groundwater from the bailer will <br /> be transferred to theamsple <br /> amthe csidesnontaieof ythelovess 1.e f1All <br /> to flow slowly g top <br /> containersosi cave meniscus d allovhead the <br /> space oshould be present <br /> form a P <br /> is <br /> in the a pwill bea inverted to check for After <br /> continer once it is airbub les.al If <br /> cappedresent the sample will be discarded and <br /> bubbles are p <br /> replaced. If it is not <br /> pemsible willt collect <br /> on the without <br /> thefield <br /> head space, the p <br /> technician's sampling log• <br /> immediately following sample collection, samples will be <br /> labeled and stored in an i lastice bags chest Sample containing <br /> labels r will <br /> chemical ice sealed in P project ID, <br /> contain the following information: date, time. All <br /> sample ID, name of sampler and type of analysis- All <br /> samples. will be transported <br /> withinn24f hours. <br /> A sample <br /> to a state certified laboratory with organic free water <br /> container filled in the laboratory <br />