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Superior Precision Analytical, In <br /> A member ofESSCON 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 /> Method Blank(s) <br /> BC031.20-01 BC061.20-01 <br /> Conc. RL Cone. RL <br /> ug/L ug/L <br /> Gasoline-Range ND 50 ND 5o <br /> Benzene ND 0.5 ND 0. 5 <br /> Toluene ND 0.5 ND 0.5 <br /> Ethyl Benzene ND 0.5 ND 0.5 <br /> Total Xylenes ND 0.5 ND 0.5 <br /> >> Surrogate Recoveries (%) « <br /> Trifluorotoluene (SS) 75 82 <br /> • <br /> Page 3 of 4 <br /> Certified Laboratories <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 98108 <br /> (510) 229-1512 / fax (510) 229-1526 (4 15) 647-2081 / fax (415) 821-7123 (206) 763-2992 / fax (2061763-8429 — <br />