Laserfiche WebLink
Third Quarter 2005 Groundwater Monitoring Report <br /> Boyett Petroleum,419 S.Main,Manteca,CA <br /> Page 4 <br /> Concentrations of MTBE in groundwater at the Site have decreased significantly during the last two <br /> Years, as shown on the graph in Figure 5, attached. There has also been a corresponding reduction in the <br /> estimated size of the MTBE plume during the same time period. The decrease in concentrations and the <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. The concentrations of dissolved oxygen are lower in the groundwater <br /> purged from MW-9 and MW-11 than in the groundwater purged from the other wells at the Site, which <br /> suggests that intrinsic bioremediation is continuing in the vicinity of MW-9 and MW-11. <br /> Condor prepared the No Further Action Request (NFAR) dated October 7, 2005, The NFAR was <br /> submitted to the SJCEHD and the CRWQCB for consideration. <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 primary <br /> MCL since the June 2004 monitoring event or earlier. The concentrations of MTBE are below the <br /> primary MCL for all the groundwater samples collected from the Site monitoring wells on September 30, <br /> 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 Iocality. Condor is not responsible for the accuracy and <br /> completeness of information collected and developed by others. <br /> • 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 /> Lee H.Morse,P.G. Donald T. Bishop <br /> Associate Geologist �S\Or1AL. Ge. Professional Geolog A No.4852 <br /> 0 <br /> O LEE H. MORSE <br /> 0- <br /> LP No.7654 <br /> W CONDOR <br />