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819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www.sequoialabs.com <br /> 1 . . <br /> Kleinfelder-Stockton Project: DeI Monte S409293 <br /> 2825 East Myrtle Street Project Number: 12280 Reported: <br /> Stockton CA,95205 Project Manager: Joe Zilles 09/29/04 19:13 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B18021B-Quality Control <br /> Sequoia Analytical -Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RHC Lirnits RPD Limit Notes <br /> Batch 4090249-EPA 5030E PIT <br /> Matrix Spike(4090249-MS1) Source:5409291-01 Prepared&Analyzed:09/15/04 <br /> Benzene 10.0 0.50 ug/l 10.0 ND 100 60-140 <br /> Toluene 10.0 0.50 " 10.0 ND 100 60-140. <br /> Ethylbenzene 9.80 0.50 " 10.0 ND 98 60-140 <br /> Xylenes(total) 29.4 0.50 " 30.0 ND 98 60-140 <br /> Surrogate:4-BFB(FID) 8.19 10.0 82 60-140 <br /> Surrogate:a,a,a-TFT(PID) 10.5 1110.0 105 60-140 <br /> Matrix S ike Dup(4090249-MSD1) Source:5409291-01 Prepared&Analyzed:09/15/04 <br /> Benzene 12.7 0.50 ug/I 10.0 ND 127 60-140 24 25 <br /> Toluene 12.6 0.50 10.0 ND 126 60-140 23 25 <br /> Ethylbenzene 12.4 0.50 10.0 ND 124 60-140 23 25 <br /> Xylenes(total) 37.3 0.50 30.0 N17 124 60-140 24 25 <br /> ;arrogate:4-BFB(FID) 10.1 10.0 101 60-140 <br /> Surrogate:a,a,a-TFT(PID) 8.78 10.0 88 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> 1 This analytical report must be reproduced in its entirety, <br /> { <br /> Page 8 of 11 <br />