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404 N Wiget Lane <br /> S e qu o l a Walnut Geek CA 94598 <br /> (925)988-96061 <br /> Analytical FAX(925)988-9673 <br /> www sequwaiabs com <br /> Gettler Ryan Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal# 2859 Reported: <br /> Dublin CA 94568 Protect Manager Scott Polston I0-Jul-01 11 20 <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 /> Batch 1 F22003- EPA 5030E PIT <br /> Blank(IF22003-BLK1) Prepared&Analyzed 22-Jun-01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 " <br /> Toluene ND 010 <br /> Ethylbenzene ND 010 <br /> Xylenes(total) ND 0 10 <br /> Methyl tert-butvl ether ND 050 <br /> Surrogate a a a-TriJluorotoluene -548 6 00 913 70-130 <br /> Blank(1F22003-BLK2) Prepared&Analyzed 25-Jun-01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 <br /> Toluene ND 010 <br /> Ethylbenzene ND 010 " <br /> Xylenes(total) ND 0 10 <br /> Methyl tert-butyl ether ND 0 50 " <br /> Surrogate a a a-Triuorotoluene S 94 600 990 70-130 <br /> LCS(IF22003-BS1) Prepared 22-Jun-01 Analyzed 27-Jun-01 <br /> Benzene 2 18 0 10 mg/m'Air 200 109 70-130 <br /> Toluene 220 0 10 200 [to 70-130 <br /> Ethylbenzene 222 0 10 200 til 70-130 <br /> Xylenes(total) 694 0 t0 600 116 70-130 <br /> Surrogate a a a-Trifluorotoluene 538 600 89 7 70-130 <br /> LCS(IF22003-BS2) Prepared&Analyzed 25-Jun-01 <br /> Benzene 448 0 10 mg/ml Air 4 00 112 70-130 <br /> i <br /> Toluene 360 0 10 4 00 900 70-130 <br /> Ethylbenzene 3 58 0 10 400 895 70-130 <br /> Xylenes(total) 113 0 10 120 94 2 70-130 <br /> Surrogate aaa-Trtuorototuene 5 92 600 98 7 70-130 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain c <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 6 of 8 <br />