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06 October 2006 AGE-NC Project No. 04-1207 Page 9 of 9 4.5. REMEDIATION SYSTEM START-UP & MONITORING ACTIVITIES During the initial"start-up"period for the SVE system(approximately 1 week),the vapor extraction system unit will be monitored daily using a Dwyer DS-200 flow sensor and a PID.The Dwyer DS- 200 flow sensor will monitor operational parameters(air flow,combustion temperature,volume of processed vapor, oxygen level, and the lower explosive limits) to ensure optimal destruction of recovered hydrocarbon vapors.The PID will monitor the concentrations of hydrocarbon vapors from the influent and effluent ends of the unit to record before and after catalytic destruction. After start-up,the vapor extraction unit will be monitored weekly using the PID and Dwyer DS-200 flow sensor to ensure optimal destruction of recovered hydrocarbon vapors and to monitor cleanup progress. In addition, vapor samples will be collected on a monthly basis from the influent and effluent ends of the system utilizing the vacuum pump on a Model 580A organic vapor meter (Thermo Environmental Instruments, Inc.); the samples will be collected into Tedlar bags, placed in a chilled container, and transported under chain of custody procedure to a DHS-certified laboratory for analysis. During the pump and treat start-up period(first 2 weeks of operation),ground water influent of the treatment system, depth to ground water measurements, and operational parameters (ground water flow meters, fluid level sensors, total flow indicators) will be monitored daily to ensure optimal removal of dissolved hydrocarbons. In addition, quarterly ground water monitoring and sampling will be conducted throughout the remediation period. 4.6. SOIL VAPOR EXTRACTION SYSTEM MAINTENANCE The SVE system will be maintained on a weekly basis, according to manufacturers recommendations. Maintenance procedures performed will require that the unit be shut down; procedures may include lubrication, oil changing, and system adjustments. 4.7. REPORTING After remediation of hydrocarbon-impacted soil and ground water has been satisfactorily achieved and remediation activities discontinued,a report will be submitted to the EHD and the CVRWQCB. The report will include analytical results and field readings, and will assess the success of short- duration soil and ground water remediation at the site. The report will be reviewed and signed by a California Professional Geologist. Advanced GeoEnvironmental,Inc.