ARCHIVED REPORTS_XR0004421 - Laserfiche WebLink

Home Browse Search

3rd Quarter SVES Report - Beason #492, Manteca 14 October 1992 f I. PROGRAM SUMMARY - THIRDQ UARTER 1992 A summary of the remediation system performance statistics for the period of operation are presented in the following table: THIRD QUARTER 1992 REMEDIATION STATISTICS Soil Vapor Extraction System Beacon Station #492 Manteca, California Hydrocarbon Mass Extracted 338 Lbs Benzene Mass Extracted 3 Lbs Initial Hydrocarbon Extraction Rate 28 Lbs/Day Final Hydrocarbon Extraction Rate <0.5 Lbs/Day The subject remediation program was conceived as a short term (<90day) operation to clean-up soils in the area of the underground fuel storage tanks. Following start-up, the extracted vapor concentrations dropped rapidly indicating a dwindling contaminant mass. During the later part of the program, the influent benzene concentration was often below detectable limits. Following the last monitoring, the SVES was left on to continue "polish venting" of the soils to the maximum extent possible before the mobile ' equipment was moved to another site. II . INDIVIDUAL MONITORING EVENTS The following section describes the start-up, servicing and monitoring activities carried out during the various site visits. 3 Start Up Activities: The system was initially started on 24 June 1992 for inspection by the San Joaquin Valley Unified Air Pollution Control D7strict (SJVUAPCD) . The District inspector verified compliance with conditions of the Authority to Construct which the SJVUAPCD issued for this project. Although the start-up was granted APCD approval , the operation was shut down following the inspection due to concerns over equipment nose. On 25 June, an acoustical enclosure was installed around the equipment by Bravo Environmental Sound Control Co. of Bakersfield. _ 2 _ k