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1551nal Road <br /> Sequoia San Carlosrlm,,CA 94070 <br /> (650)232 9600 <br /> v1w Analytical <br /> FAXsequoislabs 612 <br /> ' www scquoiaiabs corn <br /> 0 er-Ryan/Geostrateptes(l) Project Unoca](4) L208029 <br /> Sierra Court. Suite J Project Number Former Unocal#2859 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/28/02 11 23 <br /> Total Purgeable Hydrocarbons (C6-00) by EPA 8015B modified, BTEXM by EPA 8021B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reponing Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2H23003-EPA 5030B JP/T] <br /> Blank(2H23003-BLKI) Prepared&Analyzed 08/23/02 <br /> Surrogate aaa-Triuoroioluene 890 ug/l 100 890 70-130 <br /> Laboralory Control Sample(2H23003-BSI) Prepared& Analyzed 08/23/02 <br /> Benzene 9 76 050 ug/1 100 976 70-130 <br /> Toluene 101 050 10 0 101 70-130 <br /> Ethylbenzene 102 050 10 0 102 70-130 <br /> Xyienes(total) 295 050 300 983 70-130 <br /> Surrogate a,a,a-Trifluorotoluene 106 100 106 70-130 <br /> Laboratory Control Sample(2H23003-BS2) Prepared&Analyzed 08/23/02 <br /> GgSaline Range Organics(C6-C10) 241 50 ugA 250 964 70-130 <br /> Surrogate a,a a-Triuorotoluene 113 11100 113 70-130 <br /> Matrix Spike(2H23003-1%ISI) Source MLB0394-02 Prepared&Analyzed 08/23/02 <br /> Gasoline Range Organics(C6-C10) 446 50 ug/I 550 ND 81 1 60-140 <br /> Benzene 8 19 0 50 660 ND 119 160-140 <br /> Toluene 352 0 50 397 ND 885 60-140 <br /> Ethylbenzene 833 050 920 ND 905 60-140 <br /> Xylenes(total) 394 050 461 ND 85 5 60-140 <br /> Surrogate a a a-Trrfluoroioluene 11 1 100 111 70-130 <br /> Matrix Spike Dup(2H23003-MSD]) Source MLH0394-02 Prepared&Analyzed 08/23/02 <br /> Gasoline Range Organics(C6-C10) 473 50 ug/l 550 ND 860 60-140 588 25 <br /> Benzene 8 81 0 50 660 ND 129 60-140 729 25 <br /> Toluene 366 0 50 397 ND 92 0 60-140 3 90 25 <br /> Ethylbenzene 865 050 920 ND 94 0 60-140 3 77 25 <br /> Xylenes(total) 414 050 46 1 ND 898 60-140 495 25 <br /> Surrogate a a a-Trlfluoroiohtene 109 100 109 70-130 <br /> is Analytical -San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otheni,ise stated,results are reported on a wet weigh!basis <br /> This analytical report must be reproduced in its entirety <br /> Page 22 of 25 <br />