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F Superior PlOcision Anaiyticai,Qnc. <br /> 1555 Burke, Unit I • San Francisco. California 94124 - (41 5) 647-2081 /fax (4 15) 82 1-7 123 <br /> ANALYSIS FOR GASOLINE, BENZENE, TOLUENE, ETHYLBENZENE, AND XYLENES <br /> Quality Assurance and Control Data - Water <br /> Laboratory Number 57991 <br /> Method Spike <br /> Compound Blank RL Recovery Limits RPD <br /> (ug/L) (ug/L) (%) (%) <br /> Gasoline: ND<50 50 85/81 60-134 5% <br /> Benzene: ND<0. 5 0.5 106/107 60-140 1% <br /> Toluene: ND<0. 5 0.5 108/107 75-125 1% <br /> Ethyl Benzene: ND<0. 5 0.5 104/105 75-125 1% <br /> Total Xylenes: ND<0. 5 0.5 103/103 75-125 0% <br /> Definitions: <br /> ND = Not Detected <br /> RPD = Relative Percent Difference <br /> RL = Reporting Limit <br /> ug/L = Parts per billion (ppb) Senior Chemist <br /> QC File No. 57991 Account Manager <br /> Page 3 of 3 <br /> Certified Laboratories <br />