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NI k 885 Jarvis Drive Sequoia Morgan Hill CA 95037 r Analytical (468)772-9600 FAX(408)782-6308 WWW sequoialabs Corr Secor-Rancho Cordova Project ARCO#595 Stockton,CA 3017 Kilgore Rd Suite 100 Project Number ARCO 4595, Stockton,CA Reported Rancho Cordova CA,95670 Project Manager Rusty Benkosky 10/2W02 08 25 Notes and Definitions A-01 The onginal result for this analyte which was analyzed within hold time but exceeded the calibration curve was 72 ppb A-02 The original result for this analyte which was analyzed within hold time but exceeded the calibration curve was 140 ppb A-03 The ongtnal result for this analyte which was analyzed within hold time but exceeded the calibration curve was 100 ppb HC-21 Chromatogram Pattem Gasoline C6-C10 HT-04 This sample was analyzed beyond the EPA recommended holding time The results may still be useful for their intended purpose 0-09 The result was reported with a possible high bias due to the continuing calibration verification falling outside acceptance cntena QM-07 The spike recovery was outside control limits for the MS and/or MSD The batch was accepted based on acceptable LCS recovery QR-02 The RPD result exceeded the control limits,however,both percent recovenes were acceptable Sample results for the QC batch were accepted based on percent recovenes and completeness of QC data 5-02 The surrogate recovery for this sample cannot be accurately quantified due to interference from coeluting organic compounds present in the sample DET Analyte DETECTED ND Analyte NOT DETECTED at or above the reporting limit NR Not Reported dry Sample results repotted on a dry weight basis RPD Relative Percent Difference Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain ofcuslody document This analytical report must be reproduced in its entirely 17 of 17