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4 <br /> casing volume. Once the well is <br /> and indicator <br /> parameters have stabilized, a sample willged be collected after <br /> the water level approaches 80 percent of its <br /> elevation. Where water level recoveryinitial <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 utilizin <br /> equipment. Where this is not feasible, thorough cleaning of <br /> 9 dedicated <br /> equipment will be performed between sam lin <br /> Sampling will proceed from the least contaminated rtonthe <br /> most contaminated well, if information is available before <br /> sample collection, or if it is indicated by field evidence. <br /> Where several types of analysis will be <br /> given well, individual samples will be collected performed ino the <br /> following order: <br /> 1. Volatile organics <br /> 2. Purgeable organic carbon <br /> 3. PurfUeable organic halogens <br /> 4• Total organic carbon <br /> 5. Total organic halogens <br /> 6. Extractable organics <br /> 7. Total metals <br /> S. Dissolved metals <br /> 3 9. Phenols <br /> 10. Cyanide <br /> � a The specific ane]. <br /> ical methodsx 1� <br /> utilized for t <br /> volatile/samivolatile to analysesbare shown on Table 2common <br /> Groundwater samples will be collected with a teflon bailer <br /> "_j with bottom emptying device. Duplicate sa <br /> C transferred to vials or mples will be <br /> containers that meet Regional Board <br /> specifications (Table 1). Groundwater from the bailer will <br /> -' be transferred to the sample container by allowing the flrid <br /> £ to flaw slowly along the sides of the vessel. <br /> containers will, be filled above the to All <br /> form a s p of the opening to <br /> Positive meniscus. No head space should be present <br /> in the sample No <br /> once it is sealed. After the vial is <br /> capped it will be inverte3 to check for air r the <br /> bubbles. if <br /> rep-labubbced. <br /> are to the sample will be discarded and <br /> replaced. If it is not possible to collect a sample without <br /> Ik head space, the <br /> technician's sampling lin Problem will. be noted on the field . <br /> .� p g g- <br /> Iaunedatately following; sample collection, samples will be <br /> 3 labeled and <br /> stored in an ice chest ccntatnin <br /> chemicalicesealed in g:--frozen <br /> ai - Plastic--bags. <br /> Sample labels will - <br /> r. contain the following information: date, <br /> p time <br /> ti <br /> sample ` ID, name of sampler. and t prod`-ot ID, <br /> samples will be transported under chain-of-CustodyFs '' all ? <br /> to a state, certified laboratory protocol <br /> container filled in the ]aboratoWithin 24 hours. A sample: <br /> rY with organic free water <br /> i <br /> f <br /> d <br /> Y 1 <br />