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Superior Precision �Irral ica�Inc. <br /> Supe yr' <br /> 1555 Burke Unit I ■ San Francisco California 94124 ■ (415) 647-2081 1 fax (415) 821-7 123 <br /> EPA SN-846 METHOD 8240 - VOLATILE ORGANICS <br /> .,=_Quality Assurance and Control Data - Soil <br /> Laboratory Number 15049 <br /> Method Spike <br /> Compound Blank RL Recovery Limits RPD <br /> (ug/kg) (ug/kg) M <br /> Tetrachloroethene: ND<15 15 <br /> 1,1,2,2-Tetracl-ethane: ND<15 15 <br /> Toluene: ND<15 15 100/98 59-139 2% <br /> Chlorobenzene: ND<15 15 105/103 60-133 2% <br /> Ethyl Benzene: ND<15 15 <br /> Styrene: ND<15 15 <br /> Xylenes; ND<15 15 <br /> 1,3-Dichlorobenzene: ND<15 15 <br /> 1,4-Dichlorobenzene: ND<15 15 <br /> 1,2-Dichlorobenzene: ND<15 15 � <br /> 1,2-Dichloroethane-d4: 97 <br /> Toluene-d8: 98 <br /> �mofluorobenzene: 100 <br /> - <br /> Definitions: <br /> ND = Not Detected <br /> RPD = Relative Percent Difference <br /> RL = Reporting Limit <br /> kg = Parts per billion (ppb) Se for Chem st <br /> File No. 15049 Account Manager <br /> Page 5 of 5 <br /> Certified laboratories <br />