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' Second Quarter 2005 Groundwater Monitoring Report <br /> Boyett Petroleum,419 S.Main,Manteca,CA <br /> Page 4 <br /> reduction in the estimated size of the plume suggest that intrinsic bioremediation has been taking place <br /> . within the MTBE plume at the Site. <br /> Condor recommends the Site be considered for closure. The concentrations of MTBE in groundwater <br /> samples collected from MW-2, MW-3, MW-4R, MW-6, MW-8, and MW-9 have been below the MCL <br /> since the June 2004 monitoring event or earlier. The concentrations of MTBE are below the MCL for all <br /> Ithe groundwater samples collected from the Site monitoring wells on June 30, 2005. <br /> LIMITATIONS <br /> This report was prepared under the direct supervision of a Professional Geologist in the State of <br /> California. The standard of care for all services performed or furnished by Condor is commensurate with <br /> the care and skill ordinarily used by a member of the environmental profession practicing under similar <br /> conditions at the same time in the same locality. Condor is not responsible for the accuracy and <br /> completeness of information collected and developed by others. <br /> 1 This report was prepared for the sole use of Boyett Petroleum, and may not be used or relied upon by any <br /> other person(s) without the express written consent and authorization of Boyett Petroleum and Condor. If <br /> any changes are made or errors found in the information used for this report, the interpretations and <br /> conclusions contained herein shall not be considered valid unless the changes or errors are reviewed by <br /> Condor and either appropriately modified or re-approved in writing. Any questions regarding the content <br /> of this document should be addressed to Lee Morse at (209) 388-9601. <br /> Respectfully submitted, <br /> • CONDOR EARTH TECHNOLOGIES, INC. <br /> L i <br /> Lee H. Morse, P.G. c�`a f0 Donald T. Bishop <br /> Associate Geologist y.0 G� Professional Geologist CA N 4852 <br /> I LEE H. MORSE � <br /> 1 n o <br /> No. 7664 <br /> Attachments: <br /> Figures �A <br /> Figure 1 Vicinity Map <br /> Figure 2 Site Map <br /> Figure 3 Groundwater Elevation Contours, June 30, 2005 <br />' Figure 4 MTBE Concentrations in Groundwater, June 30, 2005 <br /> Figure 5 MTBE Concentrations vs. Time <br />' Site History <br /> Historical Groundwater Monitoring Data <br /> Groundwater Monitoring Field Forms <br />_ Certificates of Analyses and Chain of Custody Record <br /> P:0000 P0761 Boyett Manteca1376IC Boyett Manteca Groundwater MonitoringlReports12Q051QMR 2Q05.doc <br /> • <br /> 1 <br /> ZJ CONDOR <br />