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Q SLlperior precisiorn Analytical. Inc- <br /> A member of ESSCON Environmental Support Service Consortium <br /> Gasoline Range Petroleum Hydrocarbons and BTXE <br /> by EPA SW-846 5030/8015M/8020 <br /> Gasoline Range quantitated as all compounds from C6-C10 <br /> Quality Assurance and Control Data <br /> Laboratory Number: 50548 <br /> Compound Sample SPK Level SPK Result Recovery Limits RPD <br /> cont. <br /> For Water Matrix (ug/L) <br /> BC031.20 02 / 03 - Laboratory Control Spikes <br /> Gasoline-Range 180 190/200 106/111 65-135 5 <br /> Benzene 10 9 17/8.91 92/89 65-135 3 <br /> Toluene 10 9.45/9.43 95/94 65-135 1 <br /> Ethyl Benzene 10 9.71/9.80 97/98 65-135 1 <br /> Total Xylenes 30 29.3/30.0 98/100 65-135 2 <br /> >> Surrogate Recoveries (%) << <br /> Trifluorotoluene (55) 74/75 50-150 <br /> For Water Matrix (ug/L) <br /> BC061.20 02 / 03 - Sample Spiked: 50539 - 18 <br /> Gasoline-Range ND 180 210/190 117/106 65-135 10 <br /> Benzene ND 10 9.2/8.7 92/87 65-135 6 <br /> Toluene ND 10 9.7/9.0 97/90 65-135 7 <br /> Ethyl Benzene ND 10 9.9/9.4 99/94 65-135 5 <br /> Total Xylenes ND 30 30/28 100/93 65-135 7 <br /> >> Surrogate Recoveries << <br /> Trifluorotoluene (SS) 81/76 50-150 <br /> Definitions: <br /> ND = Not Detected <br /> RL = Reporting Limit <br /> NA = Not Analysed <br /> RPD = Relative Percent Difference <br /> ug/L = parts per billion (ppb) ug/kg = parts per billion (ppb) <br /> 40/L = parts per million (ppm) mg/kg = parts per million (ppm) <br /> Page 4 of 4 <br /> Certified Laboratories <br /> 825 Arnold Or Suite 1 14 1 555 Burke St Unit 1 309 S Cloverdale St Suite B-24 <br /> Martinez, California 94553 San Francisco, California 94124 Seattle Washington 98108 <br /> (510) 229-1512 / fax (5 10) 229-1526 (415) 647-2081 /fax (4 15) 821-7123 (206) 763-2992 / fax (206) 763-8429 <br />