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Report Number : 41612 <br /> QC Report : Laboratory Control Sample (LCS) Date : 12129/2004 <br /> Project Name : Beacon <br /> Project Number : 3641 Stockton <br /> LCS <br /> LCS Percent <br /> Spike Analysis Date Percent Recov. <br /> Parameter Level Units Method Analyzed Recov. Limit <br /> Benzene 40.0 ug/L EPA 8260B 12/27/04 92.8 70-130 <br /> Toluene 40.0 ug/L EPA 8260B 12/27/04 89.8 70-130 <br /> Tert-Butanol 200 ug/L EPA 82608 12/27/04 95.9 70-130 <br /> Methyl-t-Butyl Ether 40.0 ug/L EPA 82608 12/27/04 100 70-130 <br /> Benzene 40.0 ug/L EPA 8260B 12/22/04 101 70-130 <br /> Toluene 40.0 ug/L EPA 82608 12/22104 99.3 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 12122/04 96.6 70-130 <br /> Methyl-t-Butyl Ether 40.0 ug/L EPA 8260B 12122104 100 70-130 <br /> Benzene 40.0 ug/L EPA 82608 12/28/04 96.8 70-130 <br /> Toluene 40.0 ug/L EPA 8260B 12/28/04 103 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 12/28/04 102 70-130 <br /> Methyl-t-Butyl Ether 40.0 ug/L EPA 8260B 12/28/04 92.0 70-130 <br /> l <br /> "' KIFF AIS"~_i�TICAL, LLC Approved By: JO Kiffv: ` <br />