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t 4.5 Monitoring Ik Site monitoring will be to evaluate the site's remediation progress and to comply with agency requirements. To establish a baseline for soils, during installIation of the soil vapor well, soil samples will be collected as described above. These samples will be analyzed for TPHg, TPHd, and BTEX. Additionally, we will coordinate a quarterly groundwater monitoring event to be i conducted prior to the system startup to provide a baseline for groundwater. ;i For the APCD, monitoring and testing will be completed to obtain!�a permit to operate and to subsequently demonstrate compliance with the permit. Monitoring of the treatment system's influent concentrations and the SVE wells will aid in the evaluation of the remediation progress. Groundwater monitoring will continue to monitor the progress of the groundwater remediation. Samples run for quantitative analyses will be submitted to a state-certified laboratory. TPHg, and TPHd analyses will be run using EPA Method 8015 forsoil and groundwater. BTEX compounds will be analyzed using EPA Method 8020 for soil and groundwater. Vapor sample 11 ' will be collected and analyzed using EPA Method TO 14 for volatile organic compounds including BTEX. TPHg will be monitored using a photoionization detector(PID) or flame ionization detector (FID). The instrument, FID or PID, used during startup will be then designated for the project and be used for the program's duration and not interchange. The monitoring program is outline below. SVE Treatment System Monitoring ; ' Start Up—one day • Hydrocarbon concentrations in the oxidizer influent and effluent will be monitored to assess the treatment system's operation. Air samples will be tested using a portable FID or PID. � { • Samples of extracted vapors from the two vapor extraction wells, VEW-1 and VEW-2, will be submitted for TPHg and BTEX analyses to establish a baseline. i,. • As required by the APCD, an influent and-an effluent samplesTwill be collected from the oxidizer and analyzed during system start up. The samples will be run for TPHg and BTEX. • Oxidizer operating temperature will be continuously recorded on a chart recorder. r� sacfl=nrtiseco�zmzAnads �za9az�.ax 4-4 ro�o2oaon� I 4: ' }