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404 N %Mget Lane <br /> Walnut Creek <br /> reek C 94398 <br /> 4 (925)988 8-9600 <br /> FAX(925)988-%73 <br /> 1% „� Analytical - wwwseguoialalsCO- <br /> Gettler Ryan Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#2859 Reported <br /> Dublin CA 94568 Project Manager Scott Polston 05-Jul-OI 07 40 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical- Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Balch 1 F22003- EPA 5030B P/T <br /> Blank(IF22003-BLKI) Prepared&Analyzed 22-Jun-01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 <br /> Toluene ND 0 t0 <br /> Ethylbenzene ND 010 <br /> Xylenes(total) ND 0 t0 <br /> Methyl tent-butyl ether ND 0 50 <br /> Surrogate 6 a a a-Trruorotoluene 5 48 DO 913 10-130 <br /> Blank(IF22003-BLK2) Prepared&Analyzed 25-Jun-Ol <br /> Burgeable Hydrocarbons ND 10 mg/ml Air <br /> enzene ND 010 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 010 " <br /> Xylenes(total) ND 010 " <br /> Methyl tert-butyi ether ND 050 <br /> Surrogate a a a-Trrfluorotoluene 5 94 700 990 70-130 <br /> LCS(I F22003-BS 1) Prepared 22-Jun-01 Analyzed 27-Jun-01 <br /> Benzene 2 18 010 mg/ml Air 200 109 70-130 <br /> Toluene 220 010 200 110 70-130 <br /> Ethylbenzene 222 0 10 200 111 70-130 <br /> Xylenes(total) 694 0 10 600 116 70-130 <br /> Surrogate a a a-Triuorotoluene 538 600 89 7 70-130 <br /> LCS(I F22003-BS2) Prepared&Analyzed 25-Jun-01 <br /> Benzene 4 48 0 10 mg/m'Air 4 00 112 70-130 <br /> Toluene 3 60 0 10 400 900 70-130 <br /> Ethylbenzene 358 0 10 400 89 5 70-130 <br /> Xylenes(total) 113 0 10 120 94 2 70-130 <br /> Surrogate a a a-Tri luorotoluene 592 600 98 7 70-130 <br /> 0 <br /> Sequoia Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document Mrs analytical report must be reproduced to its entirety <br /> Page 4 of 6 <br />