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Report Number 32789 <br /> 4C Report Matrix Spike!Matrix Spike Duplicate Date 4/23/2003 <br /> Project Name 7-Eleven Store#17647 <br /> Project Number 77EL 17647 03 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dup Sample Sample Analysis Date Percent Percent Percent Recov Diff <br /> Parameter Sample__ Value Level Level Value Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 32789-01 <0 50 400 400 406 401 uglL EPA 8260B 4/19103 102 100 1 24 70-130 25 <br /> Toluene 32789-01 <0 50 400 400 383 382 ug/L EPA 8260E 4119103 957 956 0 104 70-130 25 <br /> Tert-Butanot 32789-01 <5 0 200 200 212 208 ug/L EPA 8260B 4/19103 106 104 196 70-130 25 <br /> Methyl-t Butyl Ether 32789-01 <0 50 400 400 399 363 ug/L EPA 82608 4119103 998 906 966 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By Jb61 Kiff� 4 <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 U <br />