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30 December 1998 <br /> • AGE-NC Project No 95-0173 <br />' Page 6of12 <br /> will be installed approximately one foot bsg and routed from the IAS well heads to an air <br /> compressor The proposed SVE and IAS piping system are illustrated in Figure 5 <br />' Installation of a 15 by 20 foot chain-link gated enclosure will be located in a southeast section of the <br /> site to secure the vapor extraction unit, drop-out drum and air compressor The proposed location <br /> of the gated enclosure is illustrated in Figure 5 <br /> 1 <br /> i <br /> 34 SOIL VAPOR EXTRACTION SYSTEM START-UP PERIOD <br /> During the SVE start-up period (first week of operation), influent and effluent vapor concentrations <br />' will be collected on a daily basis to ensure optimal destruction of recovered hydrocarbon vapors <br /> Operational parameters(air flow,combustion temperature,volume of processed vapor, oxygen level <br /> and the lower explosive limits (%LEL) will be monitored daily during the start-up period <br /> 35 MONITORING AND MAINTENANCE ACTIVITIES <br /> Vapor samples from the Influent will be collected on a monthly basis and submitted to a State of <br /> California Department of Health Services (DHS)-certified laboratory for analysis of the following <br /> constituents <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) In accordance with EPA <br /> Method 8015 Modified/TO-12, <br /> • Volatile aromatics (benzene, toluene, ethyl benzene and xylenes BTEX) and methyl tert- <br /> butyl ether(MTBE) in accordance with EPA Method 8020/TO-12, <br /> Laboratory reports for vapor analysis, testing methods, laboratory quality assurance/quality control <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in monthly reports <br /> Vapor influent concentrations,vapor effluent concentrations and operational parameters(combustion <br /> lemperature, volume of processed vapor, oxygen Level and the lower explosive Limits (%LEL) wiji <br /> be monitored on a weekly basis to ensure optimal destruction of recovered hydrocarbon vapors and <br /> to monitor cleanup progress <br /> The SVE/IAS system will be maintained on a weekly basis according to manufacturers <br /> recommendations (i a lubrication, oil changing, system adjustments, etc ) <br /> Quarterly ground water monitoring and sampling will be performed at the site(MW-I through MW- <br /> Adtianced GeoEmiron mental,Inc <br /> r <br />