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819 Striker Avenue Suite 8 <br /> G) Sacramento, 45834 <br /> Sequoia (916)9)921-960Q <br /> Anal tical FAX(916)921-0100 <br /> Y www sequotalabs com <br /> elta Environmental Consultants(Cameron Park) Project ARCO 2168,Stockton,CA <br /> 0 Cameron Park Dr Ste 550 Project Number 2168,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Steve Carter 04/17/02 09 40 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT- Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2030003-EPA 5030B(PIT) <br /> LCS 2030003-BS1Prepared&Analyzed 02/27/02 <br /> Benzene 974 0 50 u9/1 100 974 70-130 <br /> Toluene 9 17 0 50 100 91 7 70-130 <br /> Ethylbenzene 9 18 0 50 too 91 8 70-130 <br /> Xylenes(total) 29 1 0 50 30 0 970 70-130 <br /> Surrogate a,a a-Trifluorotoluene 100 10 0 100 60-140 <br /> Matrix Spike 2030003-MS1) Source 5202278-05 Prepared&Analyzed 02/27/02 <br /> Benzene 9 98 0 50 ug/l 10 0 1 5 84 8 60-140 <br /> Toluene 8 30 0 50 10 0 ND 79 8 60-140 <br /> Ethylbenzene 9 It 0 50 100 090 82 1 60-140 <br /> Xylenes(total) 263 0 50 300 ND 86 1 60-140 <br /> Surrogate a s a-Trifluorotoluene 9 43 100 94 3 60-140 <br /> Matrix Spike Du (2030003-MSD1) Source 5202278-05 Prepared&Analyzed 02/27/02 <br /> ene 11 2 0 50 119/1 100 1 5 970 60-140 11 5 25 <br /> o uene 9 50 0 50 10 0 ND 91 8 60-140 13 5 25 <br /> Ethylbenzene 10 5 0 50 " 10 0 090 96 0 60-140 142 25 <br /> Xylenes(total) 30 7 0 50 300 ND 101 60-140 15 4 25 <br /> Surrogate a s a-Trifluorotoluene 976 100 976 60-140 <br /> Batch 2030007-EPA 5030B_(P/T <br /> Blank 2030007-BLKI) Prepared&Analyzed 02/27/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a s a-Trifluorotoluene 8 60 100 860 60-140 <br /> oia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 10 of 15 <br />