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Drive <br /> 885 <br /> Sequoia Morgan Hill <br /> CA CA 950375037 <br /> (408)776 9600 <br /> AFAX quoia82 6308 <br /> Analytical <br /> ww v sequoialabs coni <br /> URS Corporationl <br /> Arcot Project ARCO#2130,Stockton,CA MOL0602 <br /> i <br /> 2870 Gateway Oaks Dr,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 SL22002-EPA 5030B P/T 1 EPA 8260B <br /> Laboratory Control Sample(5L22002-BSI) Prepared&Analyzed 12/22/05 <br /> i <br /> tert Amyl methyl ether 724 050 ugll 7 52 96 80 115 <br /> Benzene 300 050 2 58 116 65-115 HL <br /> tert Butyl alcohol 61 0 5 0 71 6 85 75-150 <br /> Dt-isopropyl ether 944 050 756 125 75-125 <br /> 1,2-Dichloroethane 759 050 736 103 85-130 <br /> Ethanol 200 100 708 282 70-135 HL,IC <br /> Ethyl tert butyl ether 7 92 050 752 105 75-130 <br /> Ethylbenzene 380 050 377 101 75-135 <br /> Methyl tert-butyl ether 2 83 050 3 51 81 65-125 <br /> Toluene 20 7 050 18 6 111 85-120 <br /> Xylenes(total) 191 050 206 93 85-125 <br /> AN&asohne Range Organics(C4-C]2) 231 50 220 105 60 140 <br /> 'RWSurrogate 12-Dichloroethane d4 2 00 250 80 60 135 <br /> Matrix Spike(5L22002-MS1) Source MOL0602-08 Prepared&Analyzed 12/22/05 <br /> Cert-Amyl methyl ether 38 8 2 5 ugll 376 ND 103 80-115 <br /> Benzene 14 9 2 5 129 090 109 65 115 <br /> tcrt Butyl alcohol 400 25 358 ND 112 75 120 <br /> Di isopropyl ether 45 4 2 5 378 ND 120 75-125 <br /> 1,2-Dichloroethane 46 0 2 5 368 080 123 85-130 <br /> Ethanol 241 500 354 ND 68 70-135 HM,IC <br /> Ethyl tert-butyl ether 41 4 2 5 376 ND 110 75-130 <br /> Ethylbenzene 59 6 2 5 188 46 72 75-135 LN <br /> Methyl tert butyl ether 21 0 2 5 176 2 3 106 65-125 <br /> Toluene 100 25 93 0 ND 108 85-120 <br /> Xylenes(total) 196 25 103 120 74 85-125 LN <br /> Gasoline Range Organics(C4-Cl 2) 7420 250 1100 8500 0 60-140 BB,LN <br /> Surrogate 12-Dichloroelhane-d4 251 2 50 100 60-135 <br /> Sequoia Analytical-Morgan I lill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 20 of 28 <br />