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Sequoia <br /> e qu o 819 Avenue Suite 8 <br /> 1a Sacramento CA 95834 <br /> (916)921-%00 <br /> Analyt-i c a l FAX 6)921-0100 <br /> �..i� [.a www seeq uolalabs cont <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2168, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number 2168, Stockton,CA Reported <br /> Cameron Park CA 95682 Project Manager Steve Carter 12/21/0109 27 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %RHC RPD <br /> Analyte Result Limit Units Level Result °/aREC Limits RPD Limit Notes <br /> Batch 1120185- EPA 5030B (P/T) <br /> Matrix Spike(1120185-MSI) _ Source S112024-02 Prepared&Analyzed 12/13/01 <br /> Benzene 9 52 0 50 _ ugll 100 ND 95 2 60-140 <br /> Toluene 9 15 050 100 ND 915 60-140 <br /> Ethylbenzene 9 09 0 50 100 ND 909 60-140 <br /> Xylenes(total) 27 1 0 50 300 ND 903 60-140 <br /> Surrogate a a a-Triuorotoluene - : 949 _ 100 949 60-140 <br /> Matrix Spike Dup(I120185-MSD1) _` Source S1I2024-02 Prepared&_Analyzed 12/13/01 _ <br /> Benzene 8 65 050 ug/l 300 ND 865 60-140 958 25 <br /> Toluene 831 0 50 100 ND 83 1 60-140 962 25 <br /> Ethylbenzene 821 0 50 100 ND 821 60-140 102 25 <br /> Xylenes(total) 24 8 G50 300 ND 827 60-140 986 _ 25 <br /> rrogate a a a-Triuorotoluene 8 71 100 871 60-140 <br /> Batch 1120208-EPA 5030B (PIT) <br /> Blank(1120208-BLKI) — Prepared&Analyzed 12/13/01 <br /> Purgeable Hydrocarbons ND 50 ugll <br /> Benzene ND 0 50 <br /> toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a o-Trifluorotoluene 103 _ 100 103 60-140 <br /> LCS(1120208-BS1) _ __ Prepared&Analyzed 12/13/01 <br /> Benzene 9 73 050 ugll 100 973 70-130 <br /> -1 oluene 101 0 50 100 101 70-130 <br /> Ethylbenzene 10 1 050 100 101 70-130 <br /> Xylenes(total) 28 1 0 50 300 93 7 70-130 <br /> Surrogate a a a-Tris luorotoluene _ Joe 100 108 60-140 - <br /> equola Analytical - Sacramento The results in thzs report apply to the samples analyzed in accordance wah the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 14 <br />