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r <br /> casing volume. once the well is purged and indicator d after <br /> parameters have stabil'.zed, a sample will be collecte <br /> the water level approaches BO percent of itthei iample <br /> lial <br /> elevation. Where water level recovery is slow, <br /> er stabil <br /> is ample <br /> and enough <br /> will be collected of <br /> water is present to <br /> from transferring Pumps (or bailers) <br /> Cross contamination <br /> from well to well will be avoided by utilizing dedicated <br /> equipment. Where this is not feasible, thorough cleaning of <br /> sampling rounds. <br /> equipment will be performed between <br /> ontaminated to the <br /> Sampling will proceed from the least c <br /> most contaminated well, if information is available before <br /> sample collection,eor o£ it <br /> indicated <br /> ba yperformedfield i for ea <br /> Where several <br /> types <br /> given well, individual samples will be collected on the <br /> following order: <br /> 1. Volatile organics <br /> 2. Purgeable organic carbon <br /> 3. Purgeable organic halogens <br /> 4. Total organic carbon <br /> g• Total organic halogens <br /> 6. Extractable organics <br /> 7. Total metals <br /> g. Dissolved metals <br /> 9. Phenols <br /> 10. Cyanide <br /> The specific analytical methods be utilized for the common <br /> volatile/semivolatile to analyses are ahown on Table 2. <br /> Groundwater samples will be collected with a teflon <br /> will bailer <br /> be <br /> in device. Duplicate same <br /> with bottom emptying tonal Board <br /> r transferred to vials or conGroundwaterers that <br /> fromtthegbailer will <br /> specifications (Table 1) • le container by allowing the fluid <br /> be transferred to the samevess <br /> to flow slowly along the sides of the the opening <br /> Ato <br /> containers will be filled above the lac should be present <br /> form a positive meniscus. No head sp <br /> in tsample <br /> container inverted ted once to checit is ea for. air ebubbles. if <br /> cappedsample will be discarded and <br /> bubbles are Present the ossible to collect a sample without <br /> replaced. If the s not problem will be noted on the field <br /> head space, F <br /> technician's sampling log. <br /> collection, samples will <br /> be <br /> Immediately following sample ice chest containing frozen <br /> labeled and stored in an <br /> lactic bags. sample labels will <br /> chemical ice sealed in p date, time, project ID, <br /> contain the following informati°n: of analysis. All <br /> sample ID, name of sampler and tyP-a protocol <br /> samples will be transported under chaitory <br /> n-of-custody le <br /> to gainer of i lled f incertiied theb laboratorylaora with organic free hin 24 hours. A swayer <br /> cont <br />