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Excelchem Laboratories, Inc. <br />Ancon Environmental Project: Stockton Diesel Spill <br />570 Business Park Dr. Project Number: 1043326 Date Reported: <br />Lincoln, CA 95678 Project Manager: Nolan Ryan 08/07/20 16:16 <br />Notes and Definitions <br />S-GC Surrogate recovery outside of control limits. The data was accepted based on valid recovery of the remaining <br />surrogate(s). <br />R-07 This sample was diluted due to matrix interference, resulting in elevated reporting limits <br />QR-07 Recoveries are outside acceptable QA/QC parameters due to matrix interferences. <br />QR-03 The RPD value for the sample duplicate or MS/MSD was outside of QC acceptance limits due to matrix interference. <br />QC batch accepted based on LCS and/or LCSD recovery. <br />QM-11 The spike recovery and RPD for this analyte is out of QA/QC parameters due to matrix interferences. <br />QM-01 The spike recovery for this QC sample is outside of established control limits due to sample matrix interference. <br />D-18 The sample chromatogram does not match the standard diesel chromatogram. All peaks were integrated within the <br />diesel range. The result is an estimated value. <br />D-04 The hydrocarbons present are a complex mixture of diesel range and heavy oil range organics. <br />B-03 Analyte was found in the blank but not in the associated sample(s). <br />ND Analyte not detected at reporting limit. <br />NR Not reported <br />Excelchem Laboratories. Inc. 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 />Laboratory Representative <br /> Page 18 of 18