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885 Jarvis Drive <br /> Sequoia <br /> Morgan Hill,CA 95037 <br /> (408)776-9600 <br /> FAX 308 <br /> Analytical worse 0oialab com <br /> • wgnv sequaalabs tom <br /> URS Corporation[ATC01] Protect ARCO#2130,Stockton,CA MOL0602 <br /> 2870 Gateway Oaks DT,Ste 300 Project Number GOBZK-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/04/06 16 01 <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 RPD Limit Notes <br /> Batch 5L21024-EPA 5030H PIT/EPA 8260B <br /> Matrix Spike(5L21024-MSI) Source MOL0602-06 Prepared&Analyzed 12/21/05 <br /> lert-Amyl methyl ether 17 2 050 ug/l 150 ND 115 80 115 <br /> Benzene 6 53 050 5 16 028 121 65-115 HL <br /> ten-Butyl alcohol 178 20 143 ND ]24 75-120 LM <br /> Di-isopropyl ether 195 050 151 ND 129 75-125 LM <br /> 1,2 Dichloroethane 198 050 147 2 0 121 85-130 <br /> Ethanol 247 100 142 9 0 168 70-135 HL,IC <br /> Ethyl tert bury]ether 200 050 15 0 ND 133 75-130 LM <br /> Ethylbenzene 726 050 754 035 92 75 135 <br /> Methyl tert-butyl ether 8 19 050 7 02 0 14 115 65-125 <br /> Toluene 43 4 050 372 030 116 85-120 <br /> Xylenes(total) 419 050 41 2 0 86 100 85-125 <br /> Wusaline Range Organics(C4-C12) 707 50 440 140 129 60-140 <br /> rrogale 12-Dichloroethane d4 2 47 250 99 60-135 <br /> Matrix Spike Dup(5L21024-MSDI) Source MOL0602-06 Prepared&Analyzed 12/21/05 <br /> cert Amyl methyl ether 14 5 050 ug/l 150 ND 97 80 115 17 15 RB <br /> Benzene 627 050 5 16 028 116 65-115 4 20 HL <br /> ten Butyl alcohol 187 20 143 ND 131 75-120 5 25 LM <br /> Di isopropyl ether t 8 5 050 15 1 ND 123 75-125 5 15 <br /> 1 2 Dichloroethane 168 050 147 2 0 101 85-130 16 20 <br /> Ethanol 542 100 142 9 0 375 70-135 75 35 HL,BA,IC <br /> Ethyl tert bury]ether 170 050 150 ND 113 75-130 16 25 <br /> Ethylbenzene 726 050 7 54 035 92 75 135 0 15 <br /> Methyl tert-butyl ether 6 97 050 7 02 014 97 65-125 16 20 <br /> Toluene 420 050 372 030 112 85 120 3 20 <br /> Xylenes(total) 414 050 41 2 086 98 85-125 1 20 <br /> Gasoline Range Organics(C4-C]2) 643 50 440 140 114 60-140 9 25 <br /> Surrogate 12 Dichloroethane-d4 106 250 81 60-135 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance wah the thorn of <br /> • custody document Unless otherwise stared results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 16 of 28 <br />