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a 819 Striker Avenue, Sui:e <br /> Sequoia Sacramento.C <br /> ` A 9kt <br /> 1 (916)921-90 :-; <br /> FAX <br /> Analytical (916)921 Ot J= <br /> Espana Geotechnical Consulting Project: Highway 991 Hammer Lane Interchange Sampled: 10/19/99 <br /> 502 Guiseppe Court,Ste. 1 1 Project Number: NIA Received: 10/20/99 <br /> Roseville,CA 95678 Project Manager: Michael Wilson Reported: 11/1199 <br /> Diesel Hydrocarbons(C10-C24) by DHS LUFT1Qu2lity 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.- % Noses' <br /> Batch: 9100274 Date Prepared: 10/26/99 Extraction Method: 'EPA 5030Bi{ ieOH) <br /> Blank 9106274-BLK 1 <br /> Extractable Hydrocarbons 10/27/99 ND mg/kg 1.00 <br /> Surrogate: Pentacosane 0.500 0.391 50.0-150 78.1 <br /> LCS 9100274-BSI <br /> Extractable Hydrocarbons 10/27/99 12.5 8.57 mg/kg 60A-140 68.6 <br /> Surrogate: Pentacosane 0.500 0.381 " 50.0-150 76.2 <br /> Alatrix Spike 9100274-ASST 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 9100274-1gSDI 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:_1_0118199 Extraction Method: EPA 3510B <br /> Blank 9100299-RIXI <br /> Extractable Hydrocarbons 10/28/99 ND mgll 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/l 60.0-140 84.3 <br /> Surrogate: Pentacosane 0.0400 0.0112 50.0-150 53.0 <br /> LCS Dun 9100299-BSD1 <br /> Extractable Hydrocarbons 10/28/99 1.00 0.901" tng/l b0.4 149 90.1 54.0 6.65 <br /> Surrogate: Pentacosane 0.0400 0.0377 50.0-150 119 <br /> Sequoia Anal)tieal-Sacramento 'Refer to end of report for test of notes and definitic <br /> Page 7 o <br />