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819 Striker Avenue.Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921.9600 <br /> Analytical FAX(916)921 0100 <br /> Espana Geotechnical Consulting Project: Hammer Lane Sampled: 10/14/99 <br /> 502 Guiseppe Court,Ste. 11 Project Number: N/A Received: 10/15/99 <br /> Roseville,CA 95678 Project Manager: Mike Wilson Reported: 10/29/99 <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 Analyzed Level Result Result Units Recov.Limits % Limit % Notes' <br /> Batch: 9100247 Date Prenared: 10/27/99 Extraction Method: EPA 3550A <br /> Blank 9100247-BLK1 . <br /> Extractable Hydrocarbons 10/28/99 ?*D mg/kg 2.00 <br /> Surrogate: Pentacosane 0.500 0.532 50.0-150 106 <br /> LCS 9100247-BSI <br /> Extractable Hydrocarbons 10/27/99 12.5 11.5 mg/kg 60.0-140 92.0 <br /> Surrogate: Pentacosane 0.500 0.544 50.0-150 109 <br /> Matrix Spike 9100247-NISI S910310-01 <br /> Extractable Hydrocarbons 10/27/99 12.5 45.0 55.7 mg/kg 50.0-150 85.6 _D_ <br /> Surrogate: Pentacosane 0.500 1.26 50.0-150 252 5,D <br /> Matrix Spike Dun 9100247-A1SD1 S910310-01 <br /> Extractable Hydrocarbons 10/27/99 12.5 45.0 92.6 mg/kg 50.0-150 381 50.0 127 6,7.D <br /> Surrogate: Pentacosane 110.500 1.62 "` 50.0-150 324 5,D <br /> Batch: 9100274 Date Prepared: 10/26/99 Extraction method: EPA 5030B(I\1eOH) <br /> Blank 9100274-RI,K1 <br /> Extractable Hydrocarbons 10/27/99 ND mg/kg 1.00 <br /> Surrogate: Pentacosane 110.500 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 110.500 0.509 50.0-150 102 <br /> _Matrix Spike Dup 9100274-NISD1 5910255-05 <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: Pentocosone 0.500 0.549 50.0-150 110 <br /> Sequoia Analytical-Sacramento 'Refer to end of report for text of notes and definitions. <br /> Page 6 of 7 <br />