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07 June 2012 AGE-NC Project No. 95-0184 Page 12 of 14 f (�l U remediation and aide in recovery of the volatilized hydrocarbons. Soil vapor samples will be collected at the influent from the extraction wells during the first -� four weeks of operation on a weekly basis. Samples wilt be collected at monthly or on more! regular intervals following one month of the operation of the IAS/SVE. The samples will be collected in Tedlar bags and stored in a cool container and transported under chain-of- custodyto a California-certified laboratory for analysis. Each vaporsample will be analyzed for total petroleum hydrocarbons as gasoline (TPH-g) and volatile organic compounds (BTEX/MTBE) in accordance with in accordance with EPA Methods 8015m and 8260, respectively. The SVE unit will be monitored weekly for organic vapor (OV) using a PID to ensure optimal destruction of recovered hydrocarbon vapor, and to monitor cleanup progress; initially, OV measurements will be collected on a more frequent basis until the system has stabilized. PID measurements will be recorded from the influent and effluent vapor streams of the SVE unit. Vapor samples from the SVE influent and the effluent streams will be collected in Tedlar bags on a monthly basis and submitted to a California Department of Public Health (CDPH)-certified laboratory for analysis for the following constituents: • TPH-g in accordance with EPA Method 8015 Modified; and • BTEX and the fuel additives DIPE, ETBE, MTBE, TAME,TBA, 1,2-DCA, and EDB in accordance with EPA Method 82608. Laboratory reports for vapor analysis,testing methods, laboratory quality assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be presented in periodic reports. The current ground water monitoring program will be continued at the site throughout the remediation period and data collected will be used to monitor the effectiveness of remedial operations. 4.7. MONITORING AND MAINTENANCE ACTIVITIES During the initial "start-up" period for the SVE/IAS system (approximately one week), the SVE unit will be monitored daily using a Dwyer DS-200 flow sensor and a PID. The Dwyer DS-200 flow sensor or rotometer will monitor operational parameters (air flow, combustion Advanced CcoEnvironmental,Inc.