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• 819 Striker Avenue,Suite 8 <br /> � <br /> Se of Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> vo- <br /> Delta Environmental Consultants Project: Arco 2130,Stockton,CA Sampled: 9/28/99 <br /> 3164 Gold Camp Drive,Ste.200 Project Number: N/A Received: 9/29/99 <br /> Rancho Cordova,CA 95670 Project Manager: Ben Heningburg Reported: 9/30/99 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX 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: 9090335 Date Prepared: 9/30/99 Extraction Method: EPA 5030B(MeOH) <br /> Blank 9090335-BLK1 <br /> Purgeable Hydrocarbons 9/30/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) _ ND 0.00500 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.187 60.0-140 93.5 <br /> LCS 9090335-BS 1 <br /> Benzene 9/30/99 0.200 0.177 mg/kg 70.0-130 88.5 <br /> Toluene 0.200 0.176 70.0-130 88.0 <br /> Ethylbenzene 0.200 0.175 70.0-130 87.5 <br /> Xylenes(total) 0.600 0.522 70.0-130 87.0 <br /> Surrogate: ca,a,a-Trifluorotoluene 0.200 0.184 60.0-140 92.0 <br /> Matrix Spike 9090335-MS1 S909401-02 <br /> Benzene 9/30/99 0.200 ND 0.185 mg/kg 60.0-140 92.5 <br /> Toluene 0.200 ND 0.183 60.0-140 91.5 <br /> Ethylbenzene 0.200 ND 0.183 60.0-140 91.5 <br /> Xylenes(total) " 0.600 ND 0.545 60.0-140 90.8 <br /> Surrogate: a,a,a-Triuorotoluene 0.200 0.205 60.0-140 102 <br /> Matrix Spike Dup 9090335-MSDI S909401-02 <br /> Benzene 9/30/99 0.200 ND 0.189 mg/kg 60.0-140 94.5 25.0 2.14 <br /> Toluene 0.200 ND 0.187 60.0-140 93.5 25.0 2.16 <br /> Ethylbenzene 0.200 ND 0.186 60.0-140 93.0 25.0 1.63 <br /> Xylenes(total) 0.600 ND 0.551 60.0-140 91.8 _25.0_ 1.10 _- <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.205 60.0-140 102 <br /> Batch: 9090336 Date Prepared: 9/30/99 Extraction Method: EPA 5030B MOM <br /> Blank 9090336-BLK1 <br /> Purgeable Hydrocarbons 9/30/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.229 60.0-140 114 <br /> LCS 9090336-BSI <br /> Benzene 9/30/99 0.200 0.200 mg/kg 70.0-130 100 <br /> Toluene " 0.200 0.198 it70.0-130 99.0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 8of11 <br />