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i <br /> 88$Jams Dr <br /> Sequoia Morgan Full,CA 95037 <br /> (408)77&9600 <br /> r Analytical FAX(408)782-6308 <br /> www sequoialabs con <br /> Stratus Environmental Inc Protect ARCO#2130 MMCO267 <br /> 3330 Cameron Park Dr,Suite 550 Project Number ARCO#2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 03/28/03 08 08 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3C20001-EPA 5030B PIT <br /> Laboratoa Control Sample 3020001-BS1 Prepared&Analyzed 03/20/03 <br /> Methyl tert-butyl other 955 050 ugA 100 95 5 63-137 <br /> Benzene 9 81 0 50 100 98 1 78-124 <br /> Toluene 898 0 50 too 89 8 78-129 <br /> Surrogate 1 2-Dichloroethane-d4 524 500 105 78-129 <br /> Laboratory Control Sample 3C20001-BS2 Pre ared&Analyzed 03/20/03 <br /> Methyl tert-butyl ether 854 050 ug/l 904 945 63-137 <br /> Benzene 5 25 050 544 965 78-124 <br /> 'toluene 31 0 0 50 328 94 5 78-129 <br /> Gasoline Range Organics(C6-C10) 356 50 440 809 70-113 <br /> W.—II-9-11 <br /> 1,2-Dichloroethane-d4 5 41 500 108 78-129 <br /> Matrix Spike 3C20001-MS1 Source MMCO267-15 Prepared&Analyzed 03/20/03 <br /> Methyl tort-butyl ether 849 50 ug/1 904 ND 939 0-200 <br /> Benzene 3150 50 544 2600 101 78-124 <br /> Toluene 3300 50 3280 260 927 78-129 <br /> Gasoline Range Organics(C6-C10) 55200 5000 44000 20000 goo 70-113 <br /> Surrogate 1,2-Dichloroethane-d4 522 500 104 78-129 <br /> Matrix Spike Dup(3C20001-MSD1) Source MMCO267-15 Prepared&Analyzed 03/20/03 <br /> Methyl tart-butyl ether 936 50 ug/1 904 ND 925 0-200 1 54 200 <br /> Benzene 3070 50 544 2600 864 78-124 2 57 12 <br /> Toluene 3260 50 3280 260 915 78-129 1 22 10 <br /> Gasoline Range Organics(C6-C10) 54800 5000 44000 20000 79 1 70-113 0 727 9 <br /> Surrogate 1,2-Dichloroethane-d4 5 14 " 5 00 103 78-129 <br /> Batch 3C20003-EPA 5030B PIT <br /> Blank 3C20003-BLKI) Prepared&Analyzed 03/20/03 <br /> Ethanol ND 100 ug/E 0-12 <br /> tert-Butyl alcohol ND 20 0-09 <br /> Sequoia 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 /> 17 of 20 <br />