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e <br /> 9851a"Dr <br /> a— ) Sequoia Morgan Hill,CA 95037 <br /> Analytical FAX( )782630 <br /> AMR& 1W www sequotalabs con <br /> Stratus Environmental Inc Project ARCO#2168 MMB0420 <br /> 3330 Cameron Park Dr,Suite 550 Project Number ARCO#2168,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 03/18/03 09 25 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical-Morgans Hill <br /> Reporting Spike Source %RITC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3B24040-EPA 5035 <br /> Laboratory Control Sample Dup(3B24040-BSDI) Prepared&Analyzed 0212410.3_ <br /> Methyl tert-butyl ether 9 15 050 ugll 100 915 63-137 757 13 <br /> Benzene 966 050 100 966 78-124 2 15 12 <br /> Toluene 956 050 100 956 78-129 0 946 10 <br /> Surrogate 1 1-Dichloroethane-d4 515 500 103 78-129 <br /> Laboratory Control Sample Dup(3B24040-BSD2) Prepared&Analyzed 02/24/03 <br /> Methyl tert-butyl ether 823 050 u9/1 904 91 0 63-137 370 13 <br /> Benzene 507 0 50 5 44 93 2 78-124 1 19 12 <br /> Toluene 287 0 50 32 8 67 5 78-129 1 05 10 <br /> Gasoline Range Organics(C6-C10) 433 50 " 440 98 4 70-113 644 9 <br /> arrogate 1 2-Dichloroethane-d4 493 500 986 78-129 <br /> Matrix Spike(3B24040-MS1) Source MMB0420-08 Prepared 02/24/03 Analyzed 02/25/03 <br /> Methyl tent-butyl ether 969 050 ugll 904 078 986 0-200 <br /> Benzene 499 050 544 0 15 88 8 78-124 <br /> Toluene 247 050 32 8 0 14 749 78-129 QM-07 <br /> Gasoline Range Organics(C6-C10) 337 50 440 ND 76 6 70-113 <br /> Surrogate 1 2-Dichloroethane-d4 563 500 <br /> 113 78-129 <br /> Matrix S ike Du 31324040-MSD1 Source NYMB0420-08 Prepared 02/24/03 Analyzed 02/25/03 <br /> Methyl tent-butyl ether 999 050 ug/l 904 078 102 0-200 3 05 200 <br /> Benzene 496 050 544 0 15 884 78-124 0 402 12 <br /> Toluene 242 050 " 32 8 0 14 734 78-129 204 10 QM-07 <br /> Gasoline Range Organics(C6-C10) 333 50 440 ND 757 70-113 1 19 9 <br /> Surrogate 1 2-Dichloroethane-d4 5 78 500 116 78-129 <br /> �equota Analytical-Morgan Hill 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 /> 8 of 9 <br />