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l J 819 Striker Avenue,Suite 8 <br /> Sequoia r Sacramento,,92 95834 <br /> . � {916}921-9600 <br /> FAX(916)921-0100 <br /> Analytical www.sequoiala6s.com <br /> Gettler-Ryan-Rancho Cordova Project: Former Unocal 0123,Tracy,CA <br /> 3140 Gold Camp Dr.,Ste. 170 Project Number: N/A Reported: <br /> Rancho Cordova CA,95670 Project Manager: David Herzog 09/20/01 12:27 <br /> Total Purgeable Hydrocarbon,BTEX and NIT I IBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source °/uREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1090204-EPA 5030B(MeOH) <br /> Blank(1090204-BLK1) Prepared:09/19/01 Analyzed:09/20/01 <br /> Purgeable Hydrocarbons ND 5.0 mg/kg <br /> Benzene ND 0.025 " <br /> Toluene ND 0.025 " <br /> Ethylbenzene ND 0.025 " <br /> Xylenes(total) ND 0.025 " <br /> Methyl tert-butyl ether ND 0.25 <br /> Surrogate:a,a,a-Triuorotoluene 1.11 i 1.00 111 60-140 <br /> LCS(1090204-BSI) Prepared&Analyzed:09/19/01 <br /> Benzene 1.15 0.025 mg/kg 1.00 115 70-130 <br /> Toluene 1.08 0.025 1.00 108 70-130 <br /> Ethylbenzene 1.14 0.025 1.00 114 70-130 <br /> Xylenes(total) 3.26 0.025 3.00 109 70-130 <br /> Methyl tert-butyl ether 1.26 0.25 1.00 126 70-130 <br /> Surrogate:a,a,a-Trifluorotoluene 1.24 1.00 124 60-140 <br /> Matrix Spike(1090204-MSI) Source: 5109352-01 Prepared&Analyzed:09/19/01 <br /> Benzene 1.26 0.025 mg/kg 1.00 0.096 116 60-140 <br /> Toluene 1.15 0.025 1.00 ND 114 60-140 <br /> Ethylbenzene 1.36 0.025 1.00 0.14 122 60-140 <br /> Xylenes(total) 3.75 0.025 3.00 0.22 118 60-140 <br /> Methyl tert-butyl ether 1.34 0.25 1.00 ND 134 60-140 <br /> Surrogate.-a,a,a-Trifluorotoluene 1.43 1.40 143 60-140 S-02 <br /> Matrix Spike Dup(1090204-MSD1) Source: S109152-01 P epared&Analyzed:09/19/01 <br /> Benzene 1.34 0.025 mg/kg 1.00 0.096 124 60-140 6.15 25 <br /> Toluene 1.09 0.025 1.00 ND 108 60-140 5.36 25 <br /> Ethylbenzene 1.28 0.025 1.00 0.14 114 60-140 6.06 25 <br /> Xylenes(total) 3.57 0.025 3.00 0.22 112 60-140 4.92 25 <br /> Methyl tert-butyl ether 1.19 0.25 1.00 ND 119 60-140 11.9 25 <br /> Surrogate:a,a,a-Triuorotoluene 1.44 1.00 144 60-140 S-02 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 4 of 6 <br />