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Superior precision Analytical, Inc. <br /> 825 Arnold Drive. Suite ] 14 ■ Martinez, California 94553 ■ (510' 229-15J2 / falx [510} 229 1 526 <br /> Quality Assurance and Control Data - Soil <br /> Laboratory Number 87618 <br /> i <br /> Average <br /> Method Spike Spike <br /> Compound Blank PQL Recovery Limits RPD Level <br /> (mg/Kg) (mg/Kg) (0) (0) (0) (mg/Kg) <br /> Gasoline : ND<Z 1 940 75-125 60-o 0 .4 <br /> Benzene : ND<0 . 003 0 . 003 109°, 75-125 6% 0 .4 <br /> Toluene : ND<0 . 003 0 . 003 1120 75-125 20 0 .4 <br /> Ethyl Benzene : ND<0 . 003 0 . 003 113°6 75-125 216 0 . 4 <br /> Xylenes : ND<0 . 003 0 . 003 1110 75-125 30 0 .4 <br /> 1 <br /> 1 <br /> Definitions : <br /> ND = Not Detected = Relative Percent Difference <br /> PQL = Practical Quantitation Limit <br />� . QC File No . 87618 14VIoZ4 // <br /> Seni r"'Ahiif st <br /> Page 4 of 4 <br /> Certified Laboratories <br />