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885 Jarvis DrSequoia Mcrgm Ii A,CA 95037 <br /> 4D 1W Analytical FAX(408408>(408)776-9600782fi308 <br /> www sequoialsbsccn <br /> Stratus Environmental Inc Project ARCO##2130 MLL0779 <br /> 3330 Cameron Park Dr,Suite 550 Project Number ARCO##2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 01/10/03 16 20 <br /> Notes and Definitions <br /> ✓A-01 The reporting level for TBA has been raised due to instrument contamination causing false positive results <br /> .1 This sample contains a significant amount of 3-methyl-pentane which may give a false high result for MTBE by EPA methods <br /> utilizing GC analysis <br /> i/HT-04 This sample was analyzed beyond the EPA recommended holding time The results may still be useful for their intended purpose <br /> HT-RS This sample was originally analyzed within the EPA recommended hold time Re-analysis for confirmation or dilution was <br /> performed past the recommended hold time The results may still be useful for their intended purpose <br /> ./✓R-05 The sample was diluted due to the presence of high levels of non-target analytes resulting in elevated reporting limits <br /> VS-04 The surrogate recovery for this sample is outside control limits due to interference from the sample matrix <br /> DET Analyte DETECTED <br /> ND Analyte NOT DETECTED at or above the reporting limit <br /> NR Not Reported <br /> dry Sample results reported on a dry weight basis <br /> RPD Relative Percent Difference <br /> Sequoia 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 /> 17 of 17 <br />