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Superior Precision Ana/ytica/,Inc. <br /> A member of ESSCON Environmental Support Service Consortium <br /> II � <br /> PURGABLE AROMATIC HYDROCARBONS <br /> Quality Assurance and Controllbata - Soil <br /> i <br /> i <br /> Laboratory Number 928108 <br /> i <br /> f <br /> Method Spike I <br /> Compound Blank RL Recovery Limits. RPD <br /> (mg/Kg) (mg/Kg) <br /> 1 i <br /> Benzene : ND< . 005 . 005 81/851 59-153 Sa <br /> Toluene : ND<. 005 . 005 105/110 59-153 51 <br /> Ethyl Benzene : ND< . 005 . 005 85/86, 59-153 1% <br /> Total Xylenes : ND< . 005 . 005 90/91 59-153 to <br /> M <br /> i <br /> i <br /> i <br /> Definitions : <br /> ND = Not Detected <br /> RPD = Relative Percent Difference � ) <br /> RL = Reporting Limit i <br /> mg/Kg = Parts per million (ppm) ;. Senior Chemist <br /> QC File No. 92808 Account Manager <br /> 1 . <br /> Zagfieed L�ibOrfatoriZs <br /> 825 Arnold Dr., Suite 1 14 1555 Burke St., Unit 1 309 S. Cloverdale St., Suite B-24 <br /> Martinez, California 94553 San Francisco, California 94124 Seattle, Washington 9810E <br /> (5 10) 229-1512 / fax (5 10) 229-1526 (41 5) 647-2081 / fax (41 5) 82 1-7 123 (206) 763-2992 / fax (206) 763-3429 <br />