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885 Jarvis Drive <br /> Sequoia Morgan Hill CA 95037 <br /> (408)776-9600 <br /> �� Analytical FAX(498)782-6308 <br /> www sequoialabs com <br /> 0 <br /> URS Corporation [Arcoll Project ARCO#5469, Stockton, CA MOL0448 <br /> 2870 Gateway Oaks Dr, Ste 300 Project Number GOBZP-0002 Reported <br /> Sacramento CA,95833 Protect Manager Jay Johnson 12/22/05 11 44 <br /> Conventional Chemistry Parameters by APHA/EPA Methods - 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 5L14034-General Preparation/EPA 410 4 <br /> Blank(SL14034-BLKI) Prepared&Analyzed 12/14/05 <br /> Chemical Oxygen Demand ND 30000 ugA <br /> Laboratory Control Sample(5L14034-BSI) Prepared&Analyzed 12/14/05 <br /> Chemical Oxygen Demand 122000 33000 ug/I 111000 110 75-120 <br /> Matrix Spike(5L14034-MS1) Source MOL0463-03 Prepared&Analyzed 12/14/05 <br /> Chemical Oxygen Demand 127000 33000 ugA 111000 11000 105 75-120 <br /> Matrix Spike Dup(5L14034-MSD1) Source MOL0463-03 Prepared&Analyzed 12/14/05 <br /> Chemical Oxygen Demand 133000 33000 ug/I 111000 11000 110 75-120 5 15 <br /> �uota 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 16 of 18 <br />