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Gettler-Ryan/Geostrategies(1) Projecr Unocal(4) <br /> 6747 Sierra Court,Suite J Project Number Former Unocal SS#O187 Rtp°rted <br /> Dublin CA,94568 Project Manager Deanna Harding 05/30/01 13 32 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spike Source %REC PPD <br /> Analyte Result Limit Units Level Result 9/oREC Lunits RPD Lunit Notes <br /> Batch 1050118-EPA 5030B(P/T) <br /> Blank(1050118-BLKI) Prepared&Analyzed 05/26/0) <br /> Purgeable Hydrocarbons as Gasoline ND 500 ug/I <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND Soo " <br /> Surrogate a a a-7Yifluorotoluene 9 73 100 973 70-130 <br /> LCS(1050118-BSI) Prepared&Analyzed 05/26/01 <br /> Benzene 8 98 0 500 ug/I 100 998 70-130 <br /> Toluene 882 0 500 100 88 2 70-130 <br /> benzene 9 12 0 500 100 912 70-130 <br /> es(total) 271 0 500 n300 903 70-130 <br /> Surrogate a,a,a-Trifluorotoluene 932 100 932 70-130 <br /> LCS(1050118-BS2) Prepared&Analyzed 05/26/01 <br /> Purgeable Hydrocarbons as Gasoline 246 500 ug/1 250 984 70-130 <br /> Surrogate a a a-Trifluorotoluene 912 " 100 912 70-130 <br /> Matnx Spike(10501 18-MS 1) Source L105144-12 Prepared&Analyzed 05/29/01 <br /> Purgeable Hydrocarbons as Gasoline 244 500 ugfl 250 ND 976 60-140 <br /> Surrogate a,a,a-Wuorotoluene 116 010 0 116 70-130 <br /> Matrix Spike Dnp(1050118-MSD_ 1) Source.L105144-12 Prepared&Analyzed 05/29/01 <br /> Purgeable Hydrocarbons as Gasoline 233 500 ug/l 250 ND 932 60-140 461 25 <br /> Surrogate a,a,a-Trtfluorotoluene 106 100 106 70-130 <br /> Amok <br /> cola Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Thu analytical report must be reproduced in its entirety <br /> Page 24 of 33 <br />