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y 680 Chesapeake Drive Redwood Cit \94063 (650)364-9600 FAX(650)364-9233 <br /> S e a u o 1 a 404 N.Wiget Lane Walnut Cree 94598 (925)988-9600 FAX(925)988-9673 <br /> 1 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 4D�_ Analytical 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Pinnacle/IT Project: Arco <br /> 2201 Broadway Suite 101 Project Number: Arco#6080 Reported: <br /> Oakland CA,94612 Project Manager: Joel Coffman 27-Sep-99 16:20 <br /> Notes and Definitions <br /> A-01 Unidentified Hydrocarbons>C7 <br /> Q-01 The spike recovery for this QC sample is outside of established control limits.Review of associatA d batch QC indicates the <br /> recovery for this analyte does not represent an out-of-control condition for the batch. <br /> Q-07 The RPD value for this QC sample is above the established control limit. Review of associated Q indicates the high RPD does <br /> not represent an out-of-control condition for the batch. <br /> S-04 The surrogate recovery for this sample is outside of established control limits due to a sample mat'x effect. <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-.Walnut Creek The results in this report apply to the.samples analyzed in accordance with the chain of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> Dimple S arena, ro�ect anager Page 6 of 6 <br />