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3 <br /> 4 <br /> 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> AA . (707)792-1865 <br /> nAytical. FAX(707)792-0342 <br /> M <br /> www.sequoialabs.com <br /> URS Corp-Sacramento Project: Arco Site 5469,Stockton,CA P406178 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: MW6605 Reported: <br /> Sacramento CA,95833 Project Manager: Jay Johnson 06/30/04 13:08 <br /> Notes and Definitions <br /> E The concentration indicated for this analyte is an estimated value above the calibration range of the instrument. <br /> HC-19 Discrete peak @ C5. <br /> HT-01 This sample was received beyond the EPA recommended holding time.The results may still be useful for their intended purpose. <br /> HT-RA 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 used for their intended purpose. <br /> QC01 The percent recovery was above the control limits.The sample results may still be useful for their intended purpose. <br /> QC20 The RPD was outside control limits.The results may still be useful for their intended purpose. <br /> QC21 The RPD result exceeded the control limits;however,both percent recoveries were acceptable.Sample results for the QC batch <br /> were accepted based on percent recoveries and completeness of QC data. <br /> QMO l The spike recovery was above control limits for the MS and/or MSD. The batch was accepted based on acceptable LCS recovery. <br /> QM02 The spike recovery was below control limits for the MS and/or MSD. The batch was accepted based on acceptable LCS recovery. <br /> QM05 The spike recovery was below control limits for the MS and/or MSD due to analyte concentration at 4 times or greater the spike <br /> concentration.The QC batch was accepted based on LCS and/or LCSD recoveries within the acceptance limits. <br /> DET Analyte DETECTED <br /> ND Analyte NOT DETECTED at or above the reporting limit or MDL,if MDL is specified <br /> NR Not Reported <br /> i <br /> dry Sample results reported on a dry weight basis <br /> j RPD Relative Percent Difference <br /> i <br /> i <br /> I <br /> I <br /> I <br /> i <br /> j Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the <br /> chain of custody document, Unless otherwise stated,results are reported on a wet <br /> weight basis. This analytical report must be reproduced in its entirety. <br /> i; <br /> I'. <br /> I' <br />{ Page 36 of 37 <br /> d <br /> .:�.�,..�.�:.:�..._._.,�... Wim,. W_ ... -. .. . .. <br />