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25 January 2001 <br /> AGE-NC Project No 99-0559 <br /> Page 6 of 14 <br /> 43 REMEDIATION AND MONITORING <br /> Prior to continuous operation of the pump and treat system, an initial test run of treated water will <br /> be pumped into a holding tank and composite grab ground water samples will be collected and <br /> analyzed for TPH-g, BTEX and fuel oxygenates, as specified below to verify effective treatment of <br /> the extracted ground water During the pump and treat start-up period (first two weeks of operation), <br /> ground water influent and effluent of the treatment system, depth to ground water measurements and <br /> operational parameters (ground water flow meters, fluid level sensors, total flow Indicators) will be <br /> monitored daily to ensure optimal removal of dissolved hydrocarbons and MTBE Ground water <br /> treatment operational parameters will be monitored at least once a week to monitor cleanup progress <br /> and adherence to discharge requirements The ground water treatment system components will be <br /> maintained on a weekly basis according to manufacturers' recommendations <br /> Ground water samples from the pump and treat system influent effluent and Intermediate stages and <br /> exhaust vapor samples will be collected on a weekly basis for the first month and monthly thereafter <br /> and submitted to a California Department of Health Services (DHS)-certified laboratory for analysis <br /> of the following constituents <br /> • TPH-g In accordance with EPA Method 8015m/5030, <br /> • Volatile aromatic hydrocarbons - benzene, toluene, ethylbenzene and xylene (BTEX) and <br /> MTBE In accordance with EPA Method 8020, and <br /> • Oxygenated fuel additive compounds - dl-Isopropyl ether (DIPS), ethyl tertiary-butyl ethLi <br /> (ETBE), MTBE, tertiary-amyl methyl ether(TAME) and tertiary butanol (TBA), methanol, <br /> ethanol, ethylene dlbromlde (EDB) and 1,2-dichloroethane (1,2-DCA) In accordance with <br /> 8260, respectively <br /> Laboratory reports for ground water analysis, testing methods, laboratory quality assurance/quality <br /> control (QA/QC) reports, and sample chain of custody documentation will be presented In quarterly <br /> reports <br /> 50 ADDITIONAL SITE ASSESSMENT <br /> To assess the vertical and lateral extent of hydrocarbon- and MTBE-Impacted soil and ground water <br /> on and near the site, completion of the following tasks Is required <br /> • Permitting and pre-field work activities, <br /> • CPT drilling and sample collection, <br /> • Installation and development of multi-level monitoring wells, <br /> Advanced GcO nvironnuental,In <br />