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1551 Industrial Road <br /> Sequoia San Ca94670 <br /> (650bso)23 z32-9600 <br /> Analy` { ] FAX equoi labs c 17 <br /> tical vuwwsequoialabscom <br /> Project Unocal(4) <br /> 6WS-Ryan/GeOstrategies(l) <br /> ierra Court Suite I Protect Number Former Unocal SS42859 Stockton CA Reported <br /> Dublin CA, 94568 Protect Manager Deanna Harding 09/06/01 12 14 <br /> Total Purgeable Hydrocarbons (C6-Cl2), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch IH30002 - EPA 5030B IMeOHI <br /> Blank (IH30002-BLKI) Prepared& Analyzed 08/30/01 <br /> Purgeable Hvdrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethvlbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl teri-butyl ether ND 2 5 " <br /> Surrogate a a o-Triuoroioluene 932 100 93 1 70-130 <br /> LCS(1 n30002-13S 1) Prepared&Analyzed 08/30/01 <br /> Benzene 9 56 050 ug/l too 95 6 70-130 <br /> Toluene 926 050 100 92 6 70-130 <br /> Ethylbenzene 976 050 too 97 6 70-130 <br /> Xv s(total) 29 2 0 50 30 0 97 3 70 130 <br /> S re aaa-Tr�uorotoluene 9 57 10 0 9S 7 70-130 <br /> LCS(IH30002-BS2) Prepared& Analyzed 08/30/0) <br /> Purgeable Hydrocarbons 261 50 ug/l 250 104 70-130 <br /> Surrogate a a a-Trifluoroicluene 9 94 1, 100 994 70-130 <br /> Matrix Spike(1"30002-)IS1) Source MKH0543-11 Prepared& Analyzed 08/30/01 <br /> Benzene 105 0 50 ugll 100 ND 105 60-140 <br /> Toluene 105 050 too ND 105 60-140 <br /> Ethylbenzene 107 050 too ND 107 60-140 <br /> Xylenes(total) 32 1 050 300 ND 107 60-140 <br /> Surrogate a a a-Trifluorotoluene 9 92 100 99 2 70-130 <br /> N9atrix Spike Dup(1"30002-1V1SD1) Source MKH0543-11 Prepared&Analyzed 08/30/01 <br /> Benzene 108 0 50 ug/l too ND 108 60-140 282 25 <br /> Toluene 108 0 50 100 ND 108 60-140 282 25 <br /> Ethylbenzene 11 0 0 50 100 ND 110 60-140 276 25 <br /> Xylenes(total) 33 1 050 300 ND 110 60-140 307 25 <br /> Surrogate a,a,a-Triuorotoluene 981 100 981 70-130 <br /> S a Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 21 of 22 <br />