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a <br /> 1885 Jarvis Drive <br /> / -\ Sequoia Morgan Hill CA9 037 <br /> (408)776-9600 <br /> 'Wa ► Analytical FAX(408)782-6308 <br /> www sequnialabs com <br /> URS Corporation[Arcot] Pr4lect 13P Heritage#11194,Tracy,CA MOH0245 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number 007WZ-0011 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 08/19/05 06 53 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %PEC RPD <br /> Analyte Result Limit Units Level Result "/uREC Limits RPD Limit Notes <br /> Batch 5H12011-EPA 5030B P/T/EPA 8260B <br /> Laboratory Control Sample(5H12011-BS1) Prepared&Analyzed 08/12/05 <br /> Toluene 347 050 ug/l 372 93 85-120 <br /> Xylenes(total) 423 050 414 102 85-125 <br /> Gasoline Range Organics(C4-Cl2) 436 50 440 99 70-124 <br /> Surrogate 1 2-Drchloroeihane-d4 225 250 90 60-135 <br /> Matrix Spike(5H12011-MS1) Source MOH0259-01 Prepared&Analyzed 08/12/05 <br /> tent-Amyl methyl ether 372 10 ug/l 301 40 110 80-115 <br /> Benzene 129 10 103 33 93 65-115 <br /> tert-Bury]alcohol 2730 400 2860 390 82 75-120 <br /> Di-isopropyl ether 255 10 303 ND 84 75-125 <br /> Ethanol 2650 2000 2830 920 61 70-135 LN <br /> )ethyl tett-butyl ether 342 10 300 ND 114 75-130 <br /> Ethylbenzene 237 10 151 110 84 75-135 <br /> ethyl tert-butyl ether 1160 10 " 140 1400 NR 65-125 BB,LN <br /> Toluene 734 10 744 ND 99 85-120 <br /> Xylenes(total) 905 10 828 52 109 85-125 <br /> Gasoline Range Organics(C4-C 12) 11300 1000 8800 2200 103 70-124 <br /> Surrogate 1 2-Dichloroethone-d4 247 2 50 99 60-135 <br /> Matrix Spike Dup(5H12011-MSDI) Source MOU0259-01 Prepared&Analyzed 08/I2/05 <br /> tert-Amyl methyl ether 378 10 ug/1 301 40 112 80-115 2 15 <br /> Benzene 128 10 103 33 92 65-115 0 8 20 <br /> tert-Butyl alcohol 3150 400 2860 390 97 75-120 14 25 <br /> Di-isopropyl ether 338 10 303 ND 112 75-125 28 15 RB <br /> Ethanol 3080 2000 2830 920 76 70-135 15 35 <br /> Ethyl tert-butyl ether 342 10 300 ND 114 75-130 0 25 <br /> Ethylbenzene 226 10 15I 110 77 75-135 5 15 <br /> Methyl tert-butyl ether 1220 10 140 1400 NR 65-125 5 20 BB,LN <br /> Toluene 701 10 744 ND 94 85-120 5 20 <br /> Xylenes(total) 859 10 828 52 103 85-125 5 20 <br /> Gasoline Range Organics(C4 C12) 11100 1000 8800 2200 101 70 124 2 20 <br /> Surrogate 11-Dichloroethane-d4 248 250 99 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 stated results are reported on a wet weight basis <br /> . This analytical report must be reproduced in its entirety <br /> Page 15 of 16 <br />