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25 July 2008 <br /> AGE-NC Project No . 99-0682 <br /> Page 4 of 6 <br /> on Figure 6; additional information is included in Appendix B . <br /> i <br /> i ' <br /> I ' <br /> The proposed location of the SVE unit will be in the southeast section of the site (Figure 3), which <br /> will allow the Stallworth Auto Sales facility to conduct day-to-day business with minimal <br /> interference from the operation of the SVE remediation system. The SVE unit will be secured by a <br /> chain-linked, gated enclosure. Utilities are readily available to the site; a dedicated electrical meter <br /> will be installed by PG&E that will connect directly to the SVE unit; a dedicated gas meter will be <br /> installed by representatives of PG&E that will connect directly to the SVE unit. <br /> 2 .5 . INTERIM REMEDIATION START-UP PERIOD <br /> During the SVE start-up period (first week of operation), in order to monitor hydrocarbon <br /> destruction efficiency, influent and effluent air-flow vapor samples will be collected on a dailybasis <br /> and submitted to a California Department of Public Health (CDPH)-certified laboratory for analysis <br /> for the following constituents: <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified; and <br /> • Benzene, toluene, ethylbenzene, and total xylenes (BTEX) and methyl tertiary-butyl ether :. <br /> (MTBE) in accordance with EPA Method 8260B . <br /> SVE operational parameters including soil-vapor concentrations, air flow, vacuum, and temperature <br /> will be monitored on a daily basis to gauge the optimal destruction rate of recovered hydrocarbon <br /> vapors. <br /> Following the SVE start-up period, air-flow vapor samples will be collected on a monthlybasis and <br /> the SVE operational parameters will be monitored on a weekly basis to monitor cleanup progress. <br /> li <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 for six months and submitted to a CDPH-certified laboratory for analysis for <br /> TPH-g, BTEX, and MTBE. Laboratory reports for vapor sample analyses, testing methods, <br /> laboratory quality assurance/quality control (QA/QC) reports, and sample chain of custody <br /> documentation will be presented in quarterly reports. <br /> The SVE interim remediation system will be maintained on a weekly basis according to <br /> Advanced GeoEnvironmental, Inc <br /> i <br />