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Superior Precision oo r a ytica/, Inc. <br /> 1555 Burke Unit I • San Francisco California 94124 • (4 15) 647-2081 /fax (4 15) 821-7123 <br /> Polychlorinated Biphenyls Method 8080 � } <br /> Quality Assurance and Control Data - Soil <br /> Laboratory Number 14713 <br /> Average <br /> Method Spike <br /> Compound Blank PQL Recovery Limits RPD <br /> (ug/kg) (ug/kg) M M (%) <br /> AROCLOR 1016: ND<3 3 <br /> AROCLOR 1221: ND<3 3 <br /> AROCLOR 1232 : ND<3 3 <br /> AROCLOR 1242 : ND<3 3 <br /> AROCLOR 1248: ND<3 3 <br /> AROCLOR 1254 : ND<3 3 85% 40-140 11% <br /> AROCLOR 1260: ND<3 3 <br /> Definitions: <br /> ND = Not Detected RPD = Relative Percent Difference <br /> PQL = Practical Quantitation Limit <br /> QC File No. 14713 <br /> . Se or Chemist <br /> Account Manager <br /> Page 3 of 3 <br /> Certified Laboratories <br />