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1 <br /> 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br />' Analytical FAX <br /> 4D (707)792-1865 <br /> (707)792-0342 <br /> • www sequo[alabs coin <br />' URS Corp-Sacramento Project Arco Site 760,Lodi,CA P403547 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number G09JZ-0039 Reported <br /> 1 Sacramento CA,95833 Project Manager Vernon P Elarth 03/26/04 16 49 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B- Quality Control <br /> 1 Sequoia Analytical-Petaluma <br /> Reporting Spike Source °/oREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />' Batch 4030739-EPA 5030,soils <br /> Blank 4030739-BLK1 Pre ared&Analyzed 03/25/04 <br /> 1 Gasoline Range Organics(C6-C 10) ND 10 mg/kg <br /> Benzene ND 00050 <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 ° <br /> Surrogate a a a-Trifluorotoluene 0 298 0 300 99 65-135 <br /> Surrogate 4-Bromofluorobenzene 0 260 0 300 87 65-135 <br /> Laboratory Control Sample 4030739-BS1Prepared&Analyzed 03/25/04 <br /> Gasoline Range Organics(C6-C10) 2 12 1 0 mg/kg 275 77 65-135 <br /> Benzene 00349 00050 00335 104 65-135 <br /> oyienes <br /> oluene 0 179 00050 0 190 94 65-135 <br /> thylbenzene 00440 00050 00455 97 65-135 <br /> (total) 0 213 00050 0 222 96 65-135 <br /> Surrogate a a a-Trefluorololuene 02,19 " 0 300 96 65-135 <br /> Surrogate 4-Bromofluorobenzene 0 265 0 300 88 65-135 <br /> Matrix Spike 4030739-MS1 Source P403546-02 Preared&Analyzed 03/25/04 <br /> Gasoline Range Organics(C6-C 10) 1 96 10 mg/kg 2 75 0 016 71 65-135 <br /> Benzene 00321 00050 '1 0 0335 ND 96 65-135 <br /> Toluene 0 165 0 0050 0 190 000039 87 65-135 <br /> Ethylbenzene 00407 0 0050 0 0455 ND 89 65-135 <br /> 1 Xylenes(total) 0 197 0 0050 0 222 0 00063 88 65-135 <br /> Surrogate a,a a-Trifluorololuene 0 249 0 300 83 65-135 <br /> Surrogate 4-Bromofluorobenzene 0 238 0 300 79 65-135 <br /> 1 Matrix Spike Du 4030739-MSD] Source P403546-02 Prepared&Analyzed 03/25/04 <br /> Gasoline Range Organics(C6-C10) 1 91 1 0 mglkg 2 75 0 016 69 65-135 3 20 <br /> i <br /> Benzene 0 0319 00050 0 0335 ND 95 65-135 0 6 20 <br /> Toluene 0 166 00050 0 190 000039 87 65-135 0 6 20 <br /> Ethylbenzene 00402 00050 i; 00455 ND 88 65-135 1 20 <br /> Xylenes(total) 0 195 00050 0 222 000063 88 65-135 1 20 <br /> Surrogate a a a-Trifluorotoluene 0 268 0 300 89 65-135 <br /> Surrogate 4-Bromofluorobenzene 0 253 0 300 84 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 5 of 7 <br />