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PJ9 9390405.00D 5-9 Rev. 0 09/07/88 <br />0 <br />Table 8 <br />REPRODUCIBILITY DATAI,2 <br />(Continued) <br />Sample <br />Sample <br />Volatile Organic Compound Concentration3 <br />(opb)4 <br />Number <br />Date Parameter VC <br />BENZ EDB DCA MECL PCE CCL4 <br />TCA TCE CHCL3 <br />Mean 3 <br />11 0 3 20 35 0 <br />0 1 0 <br />Reproducibility <br />(percent) <br />Standard 5 <br />12 0 7 40 40 0 <br />0 2 0 <br />Deviation <br />Reproducibility as Relative Percent Difference (RPD) <br />1. <br />Ixlx2 2 <br />2. <br />RPD <br />= x 100 <br />(x + x <br />1 2)/ <br />Where: <br />xI = primary analytical result <br />x2 = duplicate analytical <br />result <br />ND = <br />results assumed equal to one <br />half of laboratory detection limit <br />3. <br />VC = <br />vinyl chloride <br />PCE = tetrachloroethylene <br />BENZ <br />= benzene <br />CCL4 = carbon tetrachloride <br />EDB <br />= ethylene dibromide <br />TCA = 1,1,1 -trichloroethane <br />DCA <br />= 1,2-dichloroethane <br />TCE = trichloroethylene <br />MECL <br />= methylene chloride <br />CHCL3 = chloroform <br />NA = <br />not applicable <br />ND = not detected <br />4. <br />ppb <br />= parts per billion <br />5. <br />Dup <br />= duplicate <br />PJ9 9390405.00D 5-9 Rev. 0 09/07/88 <br />