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Superior Precisiorn Ana/ytiCa/, /rnc- <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-CIO <br /> Quality Assurance and Control Data <br /> Laboratory Number 81770 <br /> Compound Sample SPK Level SPK Result Recovery Limits RPD <br /> conc. <br /> For Water Matrix (ug/L) <br /> BF081 04 04 / 05 - Sample Spiked 81.770 - 03 <br /> Gasoline_Range ND 320 340/360 106/113 65-135 6 <br /> Benzene ND 20 22/21 110/105 65-135 5 <br /> Toluene 1 4 20 22/21 103/98 65-135 5 <br /> Ethyl Benzene ND 20 22/21 11.0/105 65-135 5 <br /> Total Xylenes 0 8 60 64/61 105/100 65-135 5 <br /> » Surrogate Recoveries ($) << <br /> &ifluorotoluene (SS) 104/102 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 /> mg/L = parts per million (ppm) mg/kg = parts per million (ppm) <br /> . Page 6 of 6 <br /> Certified Laboratories <br /> 875 Arnold Dr Suite 114 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 (415) 647-2081 / fax (415) 821-7123 (206) 763-2992 / fax (206) 763-8429 <br />