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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)9z i-9600 <br /> Analytical <br /> N-0 FAX(916)921-0 100 <br /> FAX <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: NIA Reported; <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 06/15/01 18:00 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1F12004-EPA 5030B [P/T <br /> Blank(lF12004-ELKI) Prepared&Analyzed: 06/12/01 <br /> Purgeable Hydrocarbons ND 1.0 mg/kg <br /> Benzene ND 0.0050 " <br /> Toluene ND 0.0050 <br /> Ethylbenzene ND 0.0050 " <br /> Xylenes(total) ND 0.0050 " <br /> Surrogate:a,a,a-Triuorotoluene 0.212 0.200 106 60-140 <br /> Surrogate:4-Bromofluorobenzene 0.181 0.200 90,5 60-140 <br /> LCS(1F12004-BSI) Prepared&Analyzed: 06/12/01 <br /> Benzene 0.246 0.0050 mg/kg 0.200 123 70-130 <br /> Toluene 0.252 0.0050 0.200 126 70-130 <br /> lbenzene 0.247 0.0050 0.200 124 70-130 <br /> rues(total) 0 755 0.0050 0.600 126 70-130 <br /> Surrogate:a,a,a-TrjJ7uorotoluene 0.213 0.200 106 60-140 <br /> Surrogate:4-Bromofluorobenzene 0.187 0.200 93.5 60-140 <br /> Matrix Spike(1F12004-MSI) Source: MKF0234-01 Prepared&Analyzed:06/12/01 <br /> Benzene 0.194 0.0050 mg/kg 0200 ND 97.0 60-140 <br /> Toluene 0.200 0.0050 0.200 ND 99.4 60-140 <br /> Ethylbenzene 0.198 0.0050 0.200 ND 99.0 60-140 <br /> Xylenes(total) 0.625 0.0050 0.600 ND 104 60-140 <br /> Surrogate:a,a,a-Triuorotoluene 0.196 0,200 98.0 60-140 <br /> Surrogate:4-Bromofluorobenzene 0.157 0.200 78.5 60-140 <br /> Matrix Spike Dup(IF12_004-MSDI) Source: MKF0234-01 Prepared&Analyzed: 06/12/01 <br /> Benzene 0.184 0.0050 mg/kg 0.200 ND 92.0 60-140 5.29 25 <br /> Toluene 0.192 0.0050 0.200 ND 95.4 60-140 4,08 25 <br /> Ethylbenzene 0.190 0,0050 0.200 ND 95.0 60-140 4.12 25 <br /> Xylenes(total) 0.576 0.0050 0.600 ND 96.0 60-140 8.16 25 <br /> Surrogate:a,a,a-Trifluorotoluene 0.200 0.200 100 60-I40 <br /> Surrogate:4-Bromoflucrobenzene 0.147 0.200 73.5 60-140 <br /> quoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> D Page 7 of 8 <br />