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l i � <br /> 30 December 1998 <br /> • AGE-NC Protect No 95-0173 <br /> IPage 7 of 12 <br /> I 12) throughout the remediation period to monitor remedial progress Depth to ground water and <br /> dissolved oxygen measurements will be collected on a monthly basis to determine if ground water <br /> mounding is occurring as a result of the IAS system <br /> 3 b PROGRESS/CONFIRMATION SAMPLING <br /> IAfter approximately six months of operation or efficiency of the SVE unit has declined, soil samples <br /> will be collected from the "core"petroleum hydrocarbon impacted area at the site Analytical results <br /> of soil samples will serve to approximate remaining petroleum hydrocarbon levels and to determine <br /> if continuing remedial operation is necessary <br /> Soil samples will be analyzed b a State of California Department of Health Services (DHS)- <br /> certified <br /> p y Y p ( ) <br /> certified laboratory for the following constituents <br /> a Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> respectively) in accordance with EPA Method 8015 Modified/5030, <br />' • Volatile aromatics (benzene, toluene, ethyl benzene and xylenes BTEX) and methyl tert- <br /> butyl ether (MTBE) in accordance with EPA Method 8020, and <br />' 0 Fuel oxygenates including MTBE,tertiary-butyl alcohol (TBA), di-isopropyl ether (DIPS), <br /> ethyl tertiary-butyl ether (ETBE) and tertiary-amyl methyl ether (TAME) by EPA Method <br /> 8260 <br /> Laboratory reports for soil analysis, testing methods, laboratory quality assuiance/quality control <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in a report with <br /> findings and recommendations <br /> I4.0. PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist Procedures for SVE/IAS well installation, underground SVE/IAS piping <br /> system installation, SVE system start-up period, sampling, monitoring, maintenance and <br /> progress/confirmation sampling are outlined below <br /> Advanced GeoEmtronmentaf,Inc <br />