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TABLE 2 <br /> FIELD QUALITY CONTROL SAMPLE DESCRIPTIONS <br /> AND COLLECTION FREQUENCIES <br /> Minimum Frequency <br /> QC Samples Sample Description of Collection <br /> Equipment Rinseate Aqueous Matrices: Analyte-free One per 20 samples or one per <br /> water(e.g. distilled or sampling event,whichever is <br /> deionized)is used to rinse more frequent <br /> sampling equipment after <br /> equipment decontamination and <br /> collected. <br /> Solid Matrices: Ashless filter <br /> paper wiped on decontaminated <br /> sampling equipment <br /> Field Duplicate Aqueous and Solid Matrices: One per 20 samples or one per <br /> One sample set collected sampling event,whichever is <br /> identically and consecutively more frequent <br /> over a minimum period of time <br /> Split Sample Aqueous and Solid Matrices: One per 20 samples or one per <br /> Split sample prepared by sampling event,whichever is <br /> collecting an aliquot of more frequent <br /> subdivided sample after <br /> appropriate sample mixing and <br /> homogenization has been <br /> performed in the field. Sample <br /> sent to reference laboratory. <br /> Field Blank Aqueous Matrices: Analyte-free One per 20 samples or one per <br /> water poured into preserved sampling event, whichever is <br /> sample bottle under field more frequent <br /> conditions. <br /> PRIVILEGED AND CONFIDENTIAL CO2085 <br /> �'1{�rA}e6ts1�19�\BAR-�tbl-t�i/�J9F�' <br /> _ _ _ l=Environmental <br />