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t28 February 2005 r <br /> • AGE-NC Project No 95-0121 <br /> Page 4 of 5 r <br /> r � , <br />' No analytes of concern were detected in any of the soil vapor samples analyzed Sall vapor analytical <br /> data is summarized in Table 2 The laboratory reports (CTEL Project Nos CT214-0402138, <br /> -0403090,-0404194,-0405170,and-0406213),quality assurance/quality control(QA/QC)reports, <br />' and chain of custody forms are included in Appendix C <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> The implications from first and second quarter 2004 environmental activities are as follows <br />' Between 08 January and 26 January 2004, approximately 0 08 feet of free-phase floating <br /> petroleum product was encountered at well VW-1 on three separate occasions, VW-1 was <br />' hand bailed on each occasion until petroleum product was not observed Thereafter, free- <br /> phase petroleum product was not measured or observed at well VW-1 on 07 and 27 April <br /> 2004 Hand bailing activities appears to have been effective in removing free-phase floating <br /> petroleum product at well VW-I - <br /> Between 03 February and 22 June 2004, the SVE unit operated for approximately <br /> 3,306 hours Extraction flow rates ranged from approximately 38 cfm to73 cfm. <br /> • No analytes of concern were detected in any of the soil vapor samples analyzed <br /> 5.0. RECOMMENDATIONS <br />' Based upon data collected during the first and secondq uarter 2004, AGE recommends <br /> • In accordance with California Underground Storage Tank Regulations, Article 5, Section <br /> 2655, free-phase petroleum product should be routinely monitored If additional petroleum <br /> product is encountered during the monitoring, then manual bailing activities should <br /> commence until the product is no longer visible At a minimum, monitoring of free-phase ,, <br /> petroleum product should be continued at wells VW-1 and EW-1 until free-phase floating <br /> petroleum product is no longer encountered <br /> • Continued operation of the on-site SVE remediation system <br /> Performance of a ground water monitoring event utilizing wells MW-1 through MW-8 and <br /> EW-1,the third quarter 2004 ground water monitoring event was performed'on 19 July 2004 <br /> and a report of findings is pending The first,quarter 2005 ground water monitoring event <br /> should take place in March 2005 <br /> r <br /> Advanced GeoEnvironmental,Inc <br />