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r <br /> Sequoia `�/ 819 Striker Avenue,Suite S <br /> ' q Sacramento,CA 958r <br /> Analytic a 1 (916)921-01OC <br /> G; FAX(916)921-0100 <br /> Espana Geotechnical Consulting Project: Highway 99/Hammer Lane Interchange Sampled: 10/19/99 <br /> 502 Guiseppe Court,Ste. 11 Project Number: N/A Received: 10/20/99 <br /> Roseville,CA 95678 Project Manager: Michael Wilson Reported: 1 1/1/99 <br /> Diesel Hydrocarbons(C10-C24) by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analvzed Level Result Result Units Recov.Limits % Limit % Nores'' <br /> Batch: 9100274 Date Prepared: 10/26/99 Extraction Method: EPA 5030B(MeOH) <br /> Blank 9100274-BLK1 <br /> Extractable Hydrocarbons 10/27/99 ND mg/kg 1.00 <br /> Surrogate: Pentacosane 0.500 0.391 50.0-150 78.2 <br /> LCS 9100274-BSI <br /> Extractable Hydrocarbons 10/27/99 12.5 8.57 mg/kg 60.0-140 68.6 <br /> Surrogate: Pentacosane 0.500 0.381 50.0-150 76.2 <br /> Matrix Spike 9100274-NISI S910255-05 <br /> Extractable Hydrocarbons 10/27/99 12.5 1.92 11.5 mg/kg 50.0-150 76.6 <br /> Surrogate: Pentacosane 0.500 0.509 50.0-150 102 <br /> Matrix Spike Dup 9100274-NISD1 S910255-05 <br /> Extractable Hydrocarbons 10/27/99 12.5 1.92 12.4 mg/kg 50.0-150 83.8 50.0 8.98 <br /> Surrogate: Pentacosane 0.500 0.549 50.0-150 110 <br /> Batch: 9100299 Date Prepared: 10/28/99 Extraction Method: EPA 3510B <br /> Rlan 9100299-Ri,KI <br /> Extractable Hydrocarbons 10/28/99 ND mg/l 0.0500 <br /> Surrogate: Pentacosane 0.0400 0.0212 50.0-150 53.0 <br /> LCS 9100299-BSI <br /> Extractable Hydrocarbons 10/28/99 1.00 0.843 mg/I 60.0-140 84.3 <br /> Surrogate: Pentacosane 0.0400 0.0212 50.0-150 53.0 <br /> LCS Dup 9100299-BSD1 <br /> Extractable Hydrocarbons 1028/99 1.00 0.901 mg/I 60.0-140 90.1 50.0 6.65 <br /> Surrogate: Pentacosane 0,0400 0.0477 50.0-150 119 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definiticr s. <br /> Page 7 o S <br />