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' AMERICAN <br /> m <br /> ANALYTICS LABORATORY QA/QC REPORT Page 1 <br /> Client Thrifty Oil Company AA ID No 85967 <br /> Project Name SS# 172 Project No NIA <br /> Method EPA 8020 (BTEX) AA Project No Al 35172-28 <br /> Sample ID Matrix Spike Date Analyzed 04/09/99 <br />' Concentration 20 ug/L Date Reported 04/14/99 <br />' Spike Dup Spike/Dup <br /> Result Recovery Result Recovery RPD Accept Rec <br /> Compounds (ug/I_) (0/6) (ug/L) (%) (%) Range (%) <br />' Benzene 2298 115 2142 107 7 65 - 135 <br /> Ethylbenzene 21 03 105 2241 112 6 77 - 123 <br />' Toluene 21 03 105 2198 110 5 66 - 134 <br /> Xylenes 21 04 105 2238 112 6 73 - 127 <br /> 1 <br /> i <br /> 1 <br /> I <br /> G or Havallas <br /> Lab atory Director <br />