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�iivanterra <br /> ,Environmental <br /> Services <br /> IDI <br /> DUPLICATE CONTROL SAMPLE REPORT <br />' Organic Subcontracted Test to Quanterra Santa Ana <br />' Concentration Accuracy Precision <br /> Analyte Spiked Measured Average Y9 (RPD) <br /> DCS1 DCS2 AVG DCS LLimits DCS Limit <br />' Category: RSKSOP175G <br /> Matrix: AQUEOUS <br /> QC Lot: ll DEC 97-AIE <br /> 1 Concentration Units: <br /> Methane 0.3265 0.400 0.400 0.400 123 40-160 0.0 30.0 <br /> Ethane NA NA NA NC NC 40-160 NC 30.0 <br />' Ethene NA NA NA NC NC 40-160 NC 30.0 <br /> Propane (DOT) NA NA NA NC NC 40-160 NC 30.0 <br /> Carbon Dioxide, Free 71 .84 73.4 74.1 73.8 103 40-160 0.9 30.0 <br />' Oxygen NA NA NA NC NC 40-160 NC 30.0 <br /> Nitrogen NA NA NA NC NC 40-160 NC 30.0 <br /> 1 The analyte was positively identified, the quantitation <br /> is an estimation. <br /> NC = Not calculated, calculation not applicable. <br /> The data are unusable due to deficiencies in the ability <br /> to analyze the sample and meet QC criteria. <br /> lecalculations areerformed before re rounding to avoid round-off errors in calculated results. <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> I <br /> I <br /> APR 2 9 1998 <br /> t�NVIHONiviENTAL HEALTH <br /> PERIIIIIT / SERVICES <br />