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CA3 rcFLN A WATER LAO'S <br /> QUALITY ASSUMhICEIQUALtfY C-ONTRdl. <br /> MAHAt3 UM3n SUMMARY <br /> Samplo and Document Control <br /> ory coordinated. <br /> It is essential that certain activitiestivities. Sample preparation and analysis time <br /> including scheduling of sampling <br /> requirements.and the tracking of samples from collection to disposal- The Sample <br /> and Document Control Department is the key departure."tt responsible for interfacing <br /> wins Field Services and analytical personnel to insert the integrity of samplm <br /> documents, and data. Procedures used by Sample and xx%cument Control include: <br /> O Chain-of Custody Document <br /> ❑ Laboratory ID and logging: Incoming samples are ,issigied an alphanu- <br /> ,� merit lab ID number logged and tracked in accordance with regulatory <br /> guidelines <br /> ❑ Secure sample storage and preservation <br /> ❑ Correct identification of analysis requirements and preparation of labora- <br /> tory work sheets <br /> ❑ Maintenance of case files: One for each set of <br /> chples eceive chain-of-custody.all reports,data,bi.ls of lading.telephone Iothe samples <br /> acking <br /> records. and all other documents pertai�zg <br /> to❑ SaIIsple tracking: The internal process of tracking samples from log-in to <br /> the final disposition and the facility security procedures of California Water <br /> Labs meet the test of the most stringent chain-of-custody requirements <br /> ❑ Sample statusing: To ensure that turnaround time requirements,.progress <br /> milestones. and timely follow-up procedures are used on all samples <br /> ❑ Sample retention: Samples are held for 30 days following the completion of <br /> analysis unless other arrangements are made. Samples containing hazard- <br /> ous substances will be returned to the customer <br /> ❑ Records retention: All data relating to sample analysis L. retained for a <br /> period of seen years <br /> Reagents,Standards,and Freparallons <br /> All solvents.reagents.and gases used by CWL are of consistent analytical quality <br /> and known purity. purity is continually monitored by analysis and comparison with <br /> newly prepared standards. All organicusolvents <br /> are Gases <br /> a�JScide Pade or equivalent. All <br /> gmde. 'These criteria <br /> — - reagents are reagent grade.ACS.-or_eq -_-...-,-_-- <br /> - are followed unless a specMc methodology has different-requirements. _ <br /> &laterials subject to chemical change on prolonged omposure toambient <br /> air- <br /> ergs <br /> o.ddation. absorption. or loss of water-are never used as q g <br /> without assay or standardization. <br /> CWI.is responsible for the traceability of ail reagents,standards.and preparations <br /> 3 <br />