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10 May 2007 <br /> AGE-NC Project No. 01-0839 <br /> Page 4 of 5 <br /> 2.6. MONITORING AND MAINTENANCE <br /> Following the initial start-up period, influent and effluent air-flow vapor samples will be collected <br /> on a monthly basis and submitted to a DHS-certified laboratory for analysis for TPH-g,BTEX,and <br /> MTBE. Laboratory reports for vapor sample analyses, testing methods, laboratory quality <br /> assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be <br /> presented in quarterly reports. <br /> The SVE interim remediation system will be maintained on a weekly basis according to <br /> manufacturer's recommendations (i.e., lubrication, oil changing, system adjustments, etc.). <br /> 2.7. REPORT PREPARATION <br /> Quarterly reports will be prepared presenting the findings from the SVE interim activities. The <br /> quarterly reports will include a description of work performed and the results of the influent and <br /> effluent vapor samples. Conclusions and recommendations will also be included in the reports, if <br /> applicable.The report will be in a format acceptable to CVRWQCB guidelines and will be reviewed <br /> and signed by a California Professional Geologist. <br /> 3.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Professional Geologist. Procedures for underground piping installation, start-up period, and <br /> weekly/monthly operation and maintenance procedures are described below. <br /> 3.1. REMEDIATION SYSTEM PIPING NETWORK <br /> A network of 2-inch diameter, schedule 40 PVC piping will be installed from remediation wells <br /> VW-2, VW-4, and VW-5 in a series of trenches, approximately 12 inch wide and 18 inches deep. <br /> All PVC piping will be routed from each remediation well head to the SVE condensation entrapment <br /> tank, located inside the SVE remediation system fenced enclosure. A PVC ball valve will be <br /> installed at each SVE well head so that soil-gas vapor can be drawn from each well independently <br /> or from a combination of specific wells. Following piping placement,the trench will be backfilled <br /> with imported road-base sand,compacted,and resurfaced with asphalt.Cross sectional views of the <br /> process piping layout are illustrated on Figure 3. <br /> Advanced GeuEnviromnental,Inc. <br />