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Report Number 42458 <br /> QC Report Laboratory Control Sample (LCS) Date 2/26/2005 <br /> Project Name 7-Eleven Store #20632 <br /> Project Number 77EL 20632 04 <br /> LCS <br /> LCS Percent <br /> Spike Analysis Date Percent Recov <br /> Parameter Level Units Method Analyzed Recov Limit <br /> Benzene 400 ug/L EPA 8260E 2122105 102 70-130 <br /> Toluene 400 ug/L EPA 8260B 2122105 99 9 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260E 2122105 91 9 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 8260B 2122105 91 1 70-130 <br /> Benzene 400 ug/L EPA 8260B 2123105 968 70-130 <br /> Toluene 400 ug/L EPA 8260B 2/23/05 971 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 2123105 105 70-130 <br /> Methyl4-Butyl Ether 400 ug/L EPA 8260B 2123105 859 70-130 <br /> Benzene 400 ug/L EPA 8260B 2124105 901 70-130 <br /> Toluene 400 ug/L EPA 8260E 2124105 927 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 2124105 902 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 8260B 2124105 800 70-130 <br /> Benzene 400 ug/L EPA 8260B 2/19105 966 70-130 <br /> Toluene 400 ug/L EPA 8260B 2119105 978 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 2119105 974 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 8260B 2119105 101 70-130 <br /> Benzene 400 ug/L EPA 8260B 2/22105 932 70-130 <br /> KIFF ANALYTICAL, LLC Approved By JO Kiff � <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />