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Geologu"I Technics lnc 0 Page 4 <br /> ' George's Service <br /> Project No. 425.3 <br /> February 5,2002 <br /> ' operation of the blower. The mass of contaminants removed will be approximately the <br /> same,however, the operation time and power usage will be significantly less. <br /> ' 3.1 Monitoring and Laboratory Analysis <br /> Vapor influent and air emissions will adhere to the Authority to Construct permit and should <br /> ation of the <br /> rbe emedial project using field insfor the rst month trumentationa PID or FID.once a Thereafter for the re resulting data will be used to <br /> optimize the extraction process and to estimate rates of contaminant removal. <br /> ' Note: This monitoring schedule may be adjusted according to requirements of the <br /> SJVUAPCD permit. <br /> ' Inspection events will include monitoring of the following parameters: <br /> a All performance functions of the treatment system. <br /> ' a Measuring and recording air flow &temperature. <br /> a Screening the influent vapor concentration with an organic vapor meter (Thermo <br /> toEnvironmental <br /> tory specifica <br /> tion on with a 100 ppmments Model Bwith a 10.2 eV photoionization con concentration of sobutylene gas).lamp, calibrated <br /> ' to factory sp <br /> A log will be maintained on site that will list cumulative operating hours, OVM monitoring <br /> data,regeneration events, and an estimate of the amount of hydrocarbons removed per day. <br /> ' Once a month a vacuum pump will be used to collect an air sample from the influent and <br /> effluent ports for laboratory analytical evaluation. The samples will be to Air-Toxics in <br /> ' Sacramento for testing of BTEX and TPH-G. The detection limits are listed below. <br /> etecUon imrts: <br /> Air µ <br /> ' 3.2 Rate of Contaminant Removal <br /> ' Mass calculations will be performed each month to determine the pounds of contaminants <br /> removed by vapor extraction. However, due to the complicated nature of natural <br /> attenuation processes, it will not be possible to quantify the mass of contamination <br /> ' destroyed in this manner. <br /> 3.3 Groundwater Monitoring <br /> ' The groundwater elevations will be measured once a month in MW-1, MW-2 and MW-5, <br /> during monitoring of the VETS, to determine if operation of the system is causing a rise in <br /> the groundwater. Groundwater elevation measurements will be made in all of the wells <br /> ' during quarterly groundwater monitoring. <br /> In addition to TPH-G and BTEX, quarterly groundwater monitoring will include the testing <br /> ' for the following compounds by method 8260: <br /> 1 <br />