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Driv <br /> q 8Hi Jarvis 5037 <br /> Sequoia Morgan�B)77G 9600 <br /> a— ) <br /> Analytical FAX(408)782.6308 <br /> www sequotalabs com• <br /> f � <br /> Sector-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MND0090 <br /> 3017 Kilgore Rd Suite 100 Project Number NIP Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/19/04 17 58 <br /> Purgeable Hydrocarbons and BTEX by EPA 801513/80218 - Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units level Result %REC Limits RPD limit 1lotes <br /> Batch 4DO7003-EPA 5030E [P/TJ <br /> Laboratory Control Sample(4D07003-BS2) Prepared&Analyzed 04/07/04 <br /> Gasoline Range Organics(C4 C 12) 545 10 mg/m'Air Soo 109 65 142 <br /> Gasoline Range Organics(C4 C 12) 15 5 24 ppmv 142 109 65 142 <br /> Surrogate a a a-Tris luorotoluene 133 134 993 56-134 <br /> Surrogate a a a-Tris luorotoluene 792 mglm'Air 800 990 56-134 <br /> Surrogate 4-8romof7uorobenzene 107 ppmv 112 955 70-130 <br /> Surrogate 4-Bromofluorobenzene 765 mg/m'Atr 800 956 70-130 <br /> Laboratory Control Sample Dup(4D07003-BSD 1) Prepared&Analyzed 04/07/04 <br /> Benzene 170 010 mg/m'Air 200 850 62-125 290 31 <br /> Benzene 0 532 0 031 ppmv 0 627 848 62-125 296 31 <br /> Toluene 202 010 mg/ml Air 2 00 101 68-121 Goo 29 <br /> Toluene 0 538 0 027 ppmv 0 532 101 68-121 0 186 29 <br /> Ethylbenzene 2 12 010 mg/ml Air 200 106 75-125 0 473 32 <br /> Ethylbenzene 0 489 0 023 ppmv 0 462 106 75-125 0205 32 <br /> Xylenes(total) 1 51 0 047 11138 109 76-121 0 664 29 <br /> Xylenes(total) 654 020 mg/ml Air 600 109 76-121 0 613 29 <br /> Surrogate a a a-Trifluorotoluene 133 ppmv 134 99 3 56-134 <br /> Surrogate a a a-Trifluorotoluene 797 mglm'Air 800 99 6 56-134 <br /> Surrogate 4-Bromofluorobenzene 0 980 ppmv 112 875 70-130 <br /> Surrogate 4-Bromofluorobenzene 701 mg/m'Arr 800 876 70-130 <br /> Laboratory Control Sample Dup(4D07003-BSD2) Prepared&Analyzed 04/07/04 <br /> Gasoline Range Organics(C4-C12) m 555 10 mg/ml Air 500 111 65-142 1 82 50 <br /> Gasoline Range Organics(C4-C]2) 15 7 24 ppmv 14 2 111 65-142 1 28 50 <br /> Surrogate a a a-Triuorotoluene 131 134 978 56-134 <br /> Surrogate a a a-Tri luoratoluene 782 mglm'Air 800 978 56-134 <br /> Surrogate 4-Bromofluorobenzene 107 ppmv 112 955 70-130 <br /> Surrogate 4-Bromofluorobenzene 764 mg/m'Atr 800 95 5 70-130 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed to 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 12 of 15 <br />