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Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> 4 (916)921-9600 <br /> Analytical FAX (916)921-0100 <br /> )T Group-Rancho Cordova Project: Tosco#4409, Stockton,CA Sampled: 612/99 <br /> ])315 Sunrise Gold Circle#A Project Number: N/A Received: 6/3/99 <br /> Rancho Cordova.CA 95742 Project Manager: Mike Mitcbener Reported: 6123199 <br /> Diesel Hydrocarbons(C10-C24)by DHS LUFTIQuality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes• <br /> Batch: 9060249 ate Prepared- 6116/94 Extraction Method: EPA 3550A <br /> Blank 9060249-1RI XI <br /> Extractable Hydrocarbons 6/21/99 ND mg/kg 1.00 <br /> Surrogate: Pentacosane 110.500 0.597 50.0-150 119 <br /> 1ST 9060249-BSI <br /> Extractable Hydrocarbons 6/21/99 12.5 12.1 mg/kg 60.0.-]40 96.8 <br /> Surrogate.• Pentacosane 0.500 0.638 50.0-150 128 <br /> Matrix Spike 9060249 S9462i9-06 <br /> Extractable Hydrocarbons 6/21/99 12.5 ND 11.6 mglkg 50.0-150 92.8 <br /> " 114 <br /> Su <br /> rg <br /> ro ate: Pentacosane <br /> 0.500 0.621 50 0-150 <br /> Matrix SpikeDun 9060249-MSD/ 5906254-0Aift6 <br /> actable Hydrocarbons 6/21/99 12.5 ND 10.6 mg/kg 50.0-150 84.8 50.0 9.01 <br /> ogate: Pentacosane 0.500 0.546 50.0-150 109 <br /> • *lie er to end a re ort or text o notes and de tuitions. <br /> Sequoia Analytical-Sacramento .f f P f f f <br /> Page 8 of 10 <br />