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819 Striker Avenue Suite 8 <br /> ` Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX 92t-01 <br /> 00 <br /> www sequequ oialabs corn <br /> SPF - <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy,CA <br /> 3017 Kilgore Road Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/11/01 18 40 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spoke Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limn Notes <br /> Batch 1040032 - EPA 50308(PIT) <br /> Blank(1040032-BLK1)_ _ _ Prepared& Analyzed 04/02/01 <br /> Purgeable Hydrocarbons ND 500 ug/l <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Surrogate a a a-Trifuorotoluene 834 100 834 60-140 <br /> _LCS(1040032-BS1) _ Prepared&Analyzed 04/02/01 <br /> Benzene 997 0 500 ug/i 100 997 70-130 <br /> Toluene lot 0 500 100 101 70-130 <br /> E (benzene 101 0 500 100 101 70-130 <br /> s(total) <br /> 300 0 500 300 100 70-130 <br /> Surrogate a s a-Trefluorotoluene 796 100 796 60-140 <br /> Matrix Spike(1040032-MSI) _ Source S103494-02 Prepared&Analyzed 04/02/01 <br /> Benzene 967 0 500 ugll 100 ND 967 60-140 <br /> Toluene 972 0 500 100 ND 972 60-140 <br /> Ethylbenzene 971 0 500 100 ND 971 60-140 <br /> Xylenes(total) 288 0 500 300 ND 960 60-140 <br /> Surrogate a s a-Trefluorotoluene 958 100 958 60-140 <br /> Matrix Spike Dup(10.40032-MSD1) Source 5103494-02 Prepared&Analyzed 04/02/01 <br /> Benzene _ I O 1 0 500 ug/l 100 ND 101 60-140 435 25 <br /> Toluene 102 0 500 " 100 ND 102 60-140 4 82 25 <br /> Ethylbenzene 101 0 500 10 0 ND 101 60-140 394 25 <br /> Xylenes(total) 303 0 500 300 ND 101 60-140 5 08 25 <br /> Surrogate a a a-Trefluorotoluene 100 100 100 60-140 <br /> oia 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 he reproduced in its entirety <br /> Page 9 of 12 <br />