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0 0 Report Number 69 <br /> 4C Report : Matrix Spike/Matrix Spike Duplicate Date 9130102 <br /> Project Name 2575 Country Club Blvd. <br /> Project Number, 244-0783 <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 28802-11 <0 50 40.0 400 408 399 ug/L EPA 8260B 9127102 102 998 218 70-130 25 <br /> Toluene 28802-11 <0 50 400 400 398 394 ug/L EPA 82608 9127102 99 4 984 1 06 70-130 25 <br /> Tert-Butanol 28802-11 <5 0 200 200 222 223 ug/L EPA 82608 9/27102 111 111 0 401 70-430 25 <br /> Methyl-t Butyl Ether 28802-11 0.84 40.0 400 325 32 0 ug/L EPA 8260E 9127102 791 78 0 143 70-130 25 <br /> Benzene 28809-04 <0 50 400 400 402 39 9 ug/L EPA 82608 9/25/02 101 996 0 949 70-130 25 <br /> Toluene 28809-04 <0 50 400 400 404 39 6 ug/L EPA 8260B 9125/02 101 98.9 212 70-130 25 <br /> Tert-Butanol 28809-04 <5 0 200 200 218 222 ug/L EPA 8260B 9125102 109 111 146 70-130 25 <br /> Methyl-t Butyl Ether 28809-04 <0 50 400 40.0 423 41.0 ug/L EPA 82608 9/25102 106 102 331 70-130 25 <br /> Benzene 28853-01 <0 50 400 400 43.3 43 7 ug/L EPA 82608 9128102 108 109 0 920 70-130 25 <br /> Toluene 28853-01 <0.50 40.0 40.0 407 40.9 ug/L EPA 8260E 9128102 102 102 0 416 70-130 25 <br /> Tert-Butanol 28853-01 <5 0 200 200 217 214 ug/L EPA 82608 9128102 109 107 1 51 70-130 25 <br /> Methyl-t Butyl Ether 28853-01 10 400 400 546 49 7 ug/L EPA 8260E 9128/02 111 98 7 11 6 70-130 25 <br /> 1 <br /> Approved By, J I KifF <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />