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Drive <br /> Y! . 8Hi Jarvis 5037 <br /> Sequoia Morgan Hill CA 95037 <br /> (408)776 9600 <br /> �� Analytical PAX(408)782-6308 <br /> • www sequotalabs com <br /> URS Corporation[Arcot] Project ARCO#2130,Stockton,CA MOL0602 <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 RPI) <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5L21028-EPA 5030B P/T/EPA 8260B <br /> Laboratory Control Sample(5L21028-1352) Prepared 12/21/05 Analyzed 12/22/05 <br /> Gasoline Range Organics(C4-C 12) 573 50 ug/l 440 130 60-140 <br /> Surrogate I 1-Dichloroethane d4 246 150 98 60-135 <br /> Laboratory Control Sample Dup(5L21028-BSDI) Prepared 12/21/05 Analyzed 12/22/05 <br /> tert-Amyl methyl ether 102 0 50 ug/l too 102 80-115 3 15 <br /> Benzene 115 0 50 loo 115 65-115 4 20 <br /> tert-Butyl alcohol 442 20 500 88 75 150 6 25 <br /> Di-isopropyl ether 1 1 0 050 too 110 75 125 4 15 <br /> 1,2-Dtchloroethane 11 6 0 50 t 0 0 116 85 130 0 9 20 <br /> Ethanol 225 100 200 112 70-135 12 35 <br /> Ethyl tert-butyl ether 107 0 50 100 107 75 130 5 25 <br /> thylbenzene 994 0 50 loo 99 75 135 3 15 <br /> ethyl tcrt butyl ether 13 2 050 too 132 65-125 5 20 HL <br /> Toluene 11 2 050 100 112 85 120 4 20 <br /> Xylenes(total) 314 050 300 105 85-125 2 20 <br /> Surrogate 12-Dtchloroethane d4 151 250 100 60 135 <br /> Matrix Spike(5L21028-MSI) Source MOL0602-15 Prepared 12/21/05 Analyzed 12/22/05 <br /> teri-Amyl methyl ether 168 50 ug/l 150 66 68 80-115 LN <br /> Benzene 1670 5 0 51 6 1600 136 65-115 BB LM <br /> tert Butyl alcohol 1810 200 1430 ND 127 75-120 LM <br /> Di isopropyl ether 187 5 0 151 ND 124 75-125 <br /> 1 2-Dtchloroethane 182 5 0 147 13 115 85-130 <br /> Ethanol 2130 1000 1420 ND 150 70-135 LM <br /> Ethyl tert-butyl ether 192 5 0 150 ND 128 75 130 <br /> Ethylbenzene 1520 5 0 754 1600 0 75 135 BB,LN <br /> Methyl tert butyl ether 81 5 5 0 702 ND 116 65-125 <br /> Toluene 1910 5 0 372 1500 110 85 120 <br /> Xylenes(total) 2950 5 0 412 2800 36 85-125 BB LN <br /> Gasoline Range Organics(C4 C12) 30200 500 4400 24000 141 60 I40 LM <br /> Surrogate 12 Dtchloroethane d4 159 150 104 60 135 <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 otherwise slated results are reported on a wet weight basis <br /> This analytical report must be reproduced in tts entirety <br /> Pa 8 <br /> Page 1 of 2$ <br />