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Table 9b <br />ACCURACY DATA <br />Volatile Organic Compoundl (VOC) Concentration <br />Sample (ppb)2 <br />Parameter Date VC BENZ EDB DCA MECL PCE CCL4 TCA TCE CHCL3 <br />CRM3 Concentration -- 4.6 5.5 6.0 5.6 5.5 5.7 <br />VOC Concentration 3/6/88 4.5 5.0 5.9 5.0 4.9 5.6 <br />Recovery4 (percent) 98 91 98 89 89 98 <br />Accuracy5 (percent) -2 -9 -2 -11 -11 -2 <br />1. VC - vinyl chloride PCE - tetrachloroethylene <br />BENZ -.benzene CCL4 - carbon tetrachloride <br />EDB - ethylene dibromide TCA - 1,1,1 -trichloroethane <br />DCA - 1,2-dichloroethane TCE - trichloroethylene <br />MECL - Methylene chloride CHCL3 - chloroform <br />2. ppb = parts per billion <br />3. CRM = Certified reference mixture <br />4. Recovery (percent) = Concentration of analyte recovered x 100 <br />Concentration of analyte in CRM <br />(Concentration of analyte recovered <br />5. Accuracy (percent) = - Concentration of analyte in CRM) x 100 <br />Concentration of analyte in CRM <br />PJ9 9390304.00D 5-14 <br />5.1 <br />5.8 <br />5.6 <br />5.5 <br />4.6 <br />5.4 <br />5.0 <br />4.9 <br />90 <br />93 <br />89 <br />89 <br />-10 <br />-7 <br />-11 <br />-11 <br />Rev. 0 09/20/88 <br />