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819 Sinker Avenue Suite 8 <br /> l Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical uv�FAX 921-0 100 <br /> sequoegttotalabs corn <br /> Gettler-Ryan-Dublin Project Unocal 0187,Stockton,CA <br /> 6747 Stena Court Ste 7 Project Number C-Sparge Test Reported <br /> Dublin CA,94568 Project Manager Paul LeChetninant 03/26/01 11 30 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPU <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1030311 - EPA 5030B P <br /> Blank(1030311-BLK1) Prepared&Analyzed 03/22/01 <br /> Purgeable Hydrocarbons ND 500 ug/1 <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 2 50 " <br /> Surrogate a a a-Trifluorotoluene 10 4 100 104 60-140 <br /> LCS(1030311-BS1) Prepared&Analyzed 03/22/01 <br /> Benzene 850 0 500 ug/1 100 850 70-130 <br /> a <br /> Cticrizene <br /> nc 946 0 500 100 946 70-130 <br /> 101 0 500 100 101 70-130 <br /> Xylenes(total) 313 0 500 300 104 70-130 <br /> Methyl Cert-butyl ether 801 250 too 801 70-130 <br /> Surrogate a a a-Trifluorotoluene 10 9 100 109 60-140 <br /> Matrix Spike(1030311-MS1) Source S103300-26 Prepared&Analyzed 03/22/01 <br /> Benzene 774 0 500 ug/l 100 ND 774 60-140 <br /> Toluene 9 13 0 500 100 ND 913 60-140 <br /> Ethylbenzene 101 0 500 I O 0 ND 101 60-140 <br /> Xylenes(total) 31 2 0 500 300 ND 104 60-140 <br /> Methyl tert-butyl ether 8 18 250 100 ND 81 8 60-140 <br /> Surrogate aaa-Triuorotoluene 103 100 103 60-140 <br /> Matrix Spike Dup(1030311-MSD1) Source 5103300-26 Prepared&Analyzed 03/22/01 <br /> Benzene 7 56 0 500 ug/l 10 0 ND 756 60-140 235 25 <br /> Toluene 888 0 500 10 0 ND 88 8 60-140 2 78 25 <br /> Ethylbenzene 978 0 500 10 0 ND 97 8 60-140 3 22 25 <br /> Xylenes(total) 30 2 0 500 300 ND 101 60-140 3 26 25 <br /> Methyl tert-butyl ether 839 250 l0 0 ND 83 9 60-140 2 53 25 <br /> Surrogate a a a-Trifluorotoluene 101 100 101 60-140 <br /> equota Analytical- Sacramento 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 5 of 7 <br /> r� -- <br />