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• • 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> Sequoia (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical _ w .sequolalabs.com <br /> Kl7East <br /> Stockton Project Fitzpatrick Homes <br /> 28rtle Street ProjectNumber. 20-4341-11 Reported: <br /> Sto95205 Project Manager: Doug Heard 07/11/01 17:04 <br /> Volatile Oxygenate Compounds by EPA Method 8260A- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %RFC RPD <br /> nalytc Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> atch 1070073-EPA 5030B [MeOH] <br /> lank(1070073-BLKI) - Prepared:07/09/01 Analyzed:07/10/01 <br /> Tat-butyl alcohol ND 10 mg/kg <br /> ethyl terutyl ether ND 0.10 <br /> op " <br /> i-isropyt-bl ether ND 0.10 <br /> Ethyl tert-butyl ether ND 0.10 <br /> ert-amyl methyl ether ND 0.10 " <br /> urrogate:1,2-DCA-d4 2.43 " 2.50 97.2 60-140 <br /> LCS(1070073-BS1) Prepared:07/09/01 Analyzed:07/10/01 <br /> ethyl ten-butyl ether 2.32 0.10 mg/kg 2.50 92.8 60-140 <br /> urrogate:1,2-DCA-d4 2.52 2.50 101 60-140 <br /> fatriz Spike(1070073-MS1) Source: 5107055-02 Prepared:07/09/01 Analyzed:07/10/01 <br /> ethyl tert-butyl ether 2 16 010 mg/kg 2.50 0.30 74.4 60-140 <br /> Surrogate:1,2-DCA-d4 2.37 2.50 94.8 60-140 <br /> Fvfatrix Spike Du p(1070073-MSDI) Source:S107055-02 Prepared:07/09/01 Analyzed:07/10/01 <br /> ethyl tert-butyl ether 1.92 0.10 mg/kg 2.50 0.30 64.8 60-140 11.8 25 <br /> Surrogate:1,2-DCA-d4 2.36 2.50 94.4 60-140 <br /> 1 <br /> 1 <br /> tSequoia 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 8 of 10 <br />