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i Report Number: 27963 QC Report : Matrix Spike/Matrix Spike Duplicate Date : 8120102 Project Name : 1267 CountryClub Project Number: 020808-CB2 Duplicate Spiked 11 Duplicate Spiked Spiked�� Sampie Relative Spike Spiked Spiked Sample Sample, Relative Percent Percent Spiked Sample Spike Dup. Sample Sample Analysis Date Percent Percent Percent Recov. Diff. Parameter Sample Value Level Level Value/ Value Units Method Analyzed Recov. Recov.11 Diff. Limit Limit TPH as Diesel Blank <50 1000 1000 837 1020 ug/L M EPA 8015 8113102 83.7 102 19.8 70-130 25 Benzene 27960-01 260 99.5 99.0 327 331 ug/L EPA 82608 8115102 71.6 75.4 5.20 70-130 25 Toluene 27960-01 160 99.5 99.0 250 253 ug/L EPA 82608 8115102 84.2 88.1 4.52 70-130 25 Tert-Butanol 27960-01 7.8 498 495 490 500 ug1L EPA 8260B 8115102 96.9 99.3 2.44 70-130 25 Methyl-t-Butyl Ether 27960-01 230 99.5 99.0 353 346 ug/L EPA 8260E 8115102 123 118 4.81 70-130 25 Benzene 27961-03 <0.50 40.0 40.0 45.6 44.4 ug/L EPA 8260B 8113102 114 111 2.67 70-130 25 Toluene 27961-03 <0.50 40.0 40.0 42.8 41.5 ug/L EPA 8260B 8113102 107 104 3.08 70-130 25 Tert-Butanol 27961-03 <5.0 200 200 212 210 ug/L EPA 8260B 8113102 106 105 0.921 70-130 25 Methyl-t-Butyl Ether 27961-03 4.7 40.0 40.0 43.9 44.0 ug/L EPA 82606 8113102 98.0 98.3 0.280 70-130 25 I j Benzene 27963-04 <0.50 40.0 40.0 41.7 43.3 ug/L EPA 82606 8112102 104 108 3.62 70-130 25 Toluene 27963-04 <0.50 40.0 40.0 39.8 37.7 ug/L EPA 8260E 8112102 99.5 94.2 5.47 70-130 25 Tert-Butanol 27963-04 <5.0 200 200 197 197 ug/L EPA 82608 8112102 98.4 98.5 0.0609 70-130 25 Methyl-t Butyl Ether 27963-04 <0.50 40.0 40.0 40.7 42.4 ug/L EPA 8260B 8112/02 102 106 3.92 70-130 25 i I I i I Approved By: J " I Kiff KIFF ANACAL, LLC • 720 Olive Drive, Suite D is, CA 95616 530-297-4800 • �� II