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• <br /> 5.0 LONGTERM MONITORING <br /> Long-term monitoring of the remedial system will include continued quarterly groundwater <br /> sampling as well as monthly monitoring of the vapor extraction system. This frequency will <br /> continue in order to allow monitoring of the extraction system progress Groundwater and <br /> vapor samples will be analyzed for TPHg and BTEX. <br /> It is anticipated that the air permit will require sample analyses of the influent and <br /> effluent vapor concentrations once a week for the first month and monthly thereafter. The <br /> vapor concentrations will be obtained with a photoionization detector (PID) from the off- <br /> gas treatment system and individual extraction vents. The exact monitoring frequency <br /> required will be dictated in the PTO issued by the SJVUAPCD. Quarterly reports will <br /> include the vapor extraction system results which will be submitted to Texaco for their <br /> distribution. <br /> 6.0 REFERENCES <br /> . Groundwater Technology, Inc., 1990, Environmental Assessment Status Report, Texaco <br /> Service Station, 440 West Charter Way, Stockton, California, October 9, 1990. <br /> Groundwater Technology, Inc., 1992, Summary Report of Soil Vapor Extraction Test and <br /> Sampling Activities, Texaco Service Station, 440 West Charter Way, Stockton, California, <br /> September, 16, 1992. <br /> Groundwater Technology, Inc., 1993, Quarterly Status Report, Texaco Service Station, 440 <br /> West Charter Way, Stockton, California, February 8, 1993. <br /> TEXSTOCK SRW SF.ACOR <br /> N0001-006-01 6 <br />