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ad <br /> ` Sequoia anCarlosCAlR 70 <br /> San Carlos CA 94070 <br /> (650)232 9600 <br /> Analytical FAX(650) labsco2 - <br /> 32 wsv wsequoiala6s com <br /> Gettler-Ryan/Geostrateejes(1) Project Unocal(4) <br /> 6747 Sierra Court Suite I Project Number Former Unocal SS112859 Stockton,CA Reported <br /> Dublin CA, 94568 Project Manager Deanna Harding 09/06/01 12 14 <br /> Total Purgeable Hydrocarbons (C6-02), BTEX and n9TBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> IAnalvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 11128002 - EPA 5030B IP/TJ <br /> Blank(IH28002-BLK1) Prepared& Analyzed 08/28/01 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethvlbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl icrt-butyl ether ND 25 " <br /> Surrogate a a a-Trif7uororoluene 983 100 983 70-130 <br /> LCS(11128002-BSI) Prepared&Analyzed 08/28/01 <br /> Benzene w9 47 k 0 50 _ug/l 10 0 94 7 70-130 <br /> Toluene 9 13 0 50 100 91 3 70-130 <br /> Ethylbenzene 964 050 100 96 4 70-130 <br /> Xvlenes(total) - 28 7 050 300 95 7 70-130 <br /> N9eihyl tent-butyl ether 463 25 70-130 <br /> Surrogate a a a-Triuoroioluene 9 73 100 973 70-130 <br /> LCS (IH28002-BS2) Prepared&Analyzed 08/28/01 <br /> Purgeable Hydrocarbons 274 50 ugh 250 110 70-130 <br /> Surrogate a a,a-Trifluoratoluene 103 100 �V 105 70-130 <br />—MatFixSpiW(1H28002=MS1) – -------Source -MKH0553-07`= Prepared&Analyzed 08/28/01--= ------ -- <br /> Benzene 106 050 ug/) 100 ND 106 60-140 <br /> Toluene 102 050 " 10 0 �ND 101 60-140 <br /> Ethylbenzene 100 050 10 0 ND 100 60-140 <br /> Xylenes(total) 308 050 300 ND 103 60-140 <br /> Surrogate a a,a-Trifiuorotaluene 9 79 100 979 70-130 <br /> Matrix Spike Dup(IH28002-1.1SD1) Source NIKH0553,07 Prepared&Analyzed 08/28/01 <br /> Benzene 103 0 50 ugh 10 0 ND 103 60-140 2 87 25 <br /> Toluene 969 050 100 ND 960 60-140 5 13 25 <br /> Ethylbenzene 948 0 50 10 0 ND 948 60-140 534 25 <br /> Xylenes(total) 293 0 50 300 ND 977 60-140 499 25 <br /> Surrogate a a,a-Trii luorotoluene 962 100 962 70-130 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> 0 <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 16 of 22 <br />