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Quarterly Groundwater Monitoring Report - First Quarter 2016 <br /> L&M Operable Unit-West Weber Avenue and North Lincoln Street, Stockton, CA <br /> April 29, 2016 <br /> QCEB-3Ff), TPHd was detected slightly above the laboratory method reporting limit (0.064 mg/L) <br /> which could indicate that the data reported for these samples is bias low by 0.014 mg/L. <br /> However, TPHd is within historical ranges for these samples and the detection is not anticipated <br /> to compromise the reported data. <br /> The n-Octacosane surrogate for TPH was outside of quality control (QC) range for percent <br /> recovery in sample MW-17; lab indicates matrix interference. Reported values for TPH were <br /> consistent with historical data and other surrogates were in range. Data is not considered to be <br /> compromised. <br /> The RPD was slightly out of QC range for TPHd in batch 283672 and 283673. Laboratory control <br /> spike/duplicate (LCS/LCSD) are within range thus reported data is not considered to be <br /> compromised. <br /> Stantec QA/QC review of the laboratory reports indicates that all data are considered valid for <br /> 1Q16. <br /> 2.2.5 Waste Disposal <br /> On January 14, 2016 approximately 985 gallons of purge water was transferred to the on-site <br /> remediation system, treated, and discharged to the sewer under the waste water discharge <br /> permit for West Weber Avenue and North Lincoln Street, Stockton, CA. <br /> • <br /> ® Stantec 8 <br />