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Sq 865 Jarvis Drive <br /> e 1,1Q1a Morgan Btll CA 95037 <br /> (408)776-9600 <br /> Analytical FAX 782-6308 <br /> www sequoequotala6s cum <br /> URS Corporation[Arcot] Project BP Heritage#11194,Tracy,CA MOK01 I5 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WZ-0011 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 11/23/05 08 47 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RAD Limit Notes <br /> Batch 5K10030-EPA 5030B PIT 1 EPA 8260B <br /> Blank(5K10030-BLKI) Prepared&Analyzed 11/10/05 <br /> tert Amy]methyl ether ND 050 ug/l <br /> Benzene ND 050 " <br /> ter[-Butyl alcohol ND 20 " <br /> Di isopropyl ether ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl ten-butyl ether ND 050 <br /> Ethylbenzene ND 050 " <br /> Methyl tert butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4 C12) ND 50 <br /> rugate 12-Dichloroethane-d4 228 250 91 60-135 <br /> oratory Control Sample(5K10030-8SI) Prepared&Analyzed 11/10/05 <br /> tcrt Amyl methyl ether 175 050 ugli 150 117 80-115 HL <br /> Benzene 552 050 5 16 107 55-115 <br /> tert-Butyl alcohol 125 20 143 87 75-150 <br /> Di-isopropyl ether 15 9 050 151 105 75 125 <br /> Ethanal 306 100 142 215 70-135 HL <br /> Lthyl tert-butyl ether 169 050 150 113 75-130 <br /> Ethylbenzene 600 050 754 88 75-135 <br /> Methyl tert-bury]ether 794 050 7 02 113 65-125 <br /> Toluene 355 050 372 95 85-120 <br /> Xylenes(total) 366 050 41 2 89 85-125 <br /> Gasoline Range Organics(C4 C12) 475 50 440 108 60-140 <br /> Surrogate 12-Dichloroethane-d4 224 250 90 60-135 <br /> Matrix Spike(5K10030-MS1) Source MOK0005-05 Prepared 11/10/05 Analyzed 11/11/05 <br /> tert Amy]methyl ether 1780 50 ug/l 1500 10 118 80-115 HL <br /> Benzene 6410 50 516 6000 79 65-115 <br /> tert-Butyl alcohol 12800 2000 14300 ND 90 75-120 <br /> Di isopropyl ether 1590 50 1510 20 104 75-125 <br /> Ethanol 33700 10000 14200 1300 228 70 135 HL <br /> Ethyl tert-butyl ether 1730 50 1500 17 114 75-130 <br /> Ethylbenzene 1560 50 754 860 93 75-135 <br /> Methyl tert butyl ether 825 50 702 19 115 65-125 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwrse stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 11 <br />