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SECUK From: Superior Analytical Laboratory 11-6-97 0:35am P. 7 of 7 <br /> f <br /> Gasoline Range Petroleum Hydrocarbons and BTXE <br /> by EPA SW-849 5030/8015M/8020 <br /> Gasoline Range quantitated am all compounds from C6-C10 <br /> Quality Assurance and Control Data <br /> Laboratory Number: 23475 <br /> Compound sample SPK Level SPK Result Recovery Limits RPD <br /> cont. -V g <br /> For Water Matrix (ug/L) <br /> DK042.37 02 / - Laboratory Control Spikes <br /> Gasoline Range 2000 1800 95 65-135 <br /> Benzene 20 22 1.10 65-135 <br /> Toluene 20 22 110 65-135 <br /> Ethyl Benzene 20 22 110 65-1.35 <br /> Total Xylenes 60 65 1.08 65-135 <br /> y ogate Recoveries M << <br /> Tixluorotoluene (SS) 101 50-150 <br /> For Water Matrix (ug/L) <br /> DK042,37 03 / 04 - Sample Spiked: 23464 _ 02 <br /> Gasoline Range ND 2000 19010/1900 95/95 65-1.35 0 <br /> Benzene ND 20 23/22 115/110 65-135 4 <br /> Toluene ND 20 22/22 110/110 65-135 0 <br /> Ethyl Benzene ND 20 22/22 11.0/1.1.0 65-135 0 <br /> Total Xylenes ND 60 66/66 110/110 65-1.35 0 <br /> n Surrogate Recoveries (1k) [< <br /> Trifluorotoluene (SS) 99/98 50-150 <br /> 3Pinitions: <br /> 7 = Not Detected <br /> ,:j = Reporting Limit <br /> A = Not ,Analysed <br /> PD = Relative Percent Difference <br /> g/L = parts per billion (ppb) ug/kg = parts per billion (ppb) <br /> 3/1- - parts per million (ppm) mg/kg = parts per million (ppm) <br /> @production of this report is permitted only in its entirety. Page 4 of 4 <br />