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17 March 1997 <br /> AGE-NC Project No. 95-0100 <br /> Page 4of7 <br /> Natural gas is readily available on-site. Representatives of P. G. & E. will install a dedicated gas line <br /> that will be connected with the VES unit within'the proposed enclosure. A teeter will be installed <br /> to monitor supplemental fuel consumption. <br /> 4.1.3. MONITORING <br /> The VES will be monitored weekly using a photo-ionization detector (PID) to ensure optimal- <br /> destruction of recovered hydrocarbon vapors,and to monitor the cleanup progress. PID readings will <br /> be recorded from the VES unit at the in fluent, as well as readings before and after catalytic <br /> destruction. Optimal destruction will depend on four operational parameters; combustion <br /> temperature, volume of processed vapor, oxygen level and the lower explosive limits (%11EL). <br /> Air samples will be collected on a monthly basis. The samples will be collected in Tedlar bags and <br /> transported to a state certified laboratory for analysis of total petroleum hydrocarbons quantified as <br /> gasoline (TPH-g), volatile aromatics (benzene, toluene, ethyl benzene and xylenes: BTE&X) and <br /> methyl-tertiary butyl ether (MTBE), in accordance with EPA approved methods. The analytical <br /> results will assist in correlating PID readings and determining when to advance confirmation soil <br /> borings. <br /> During the-"start-up" period for the SVE system, organic vapor monitoring will performed oil at <br /> least three times per week. The anticipated start-up period will be approximately three to four weeks. <br /> 4.2. PERMITTING <br /> An application for a site specific permit will be submitted to the San Joaquin Valley Air Pollution <br /> Control District (SJVAPCD) prior to initiation of the, remediation project: In addition, proper <br /> building permits will be obtained from the'San Joaquin County Building Department for necessary <br /> construction work. <br /> 4.3. SYSTEM MAINTENANCE . <br /> The SVE/IAS system will be maintained on a weekly basis, according to' manufacturers <br /> recommendations: After stabIization;�routine maintenance would represent the'only periods of <br /> "down time"for the unit."About twice monthly (assuming 24-hour operation) the unit will:be shut <br /> down for routine maintenance procedures such as lubrication, oil changing,and system adjustments. <br />