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Mr Barton <br /> September 29, 2006 <br />' Page 4 of 5 <br />' As shown in the table above, TCE and PCE were detected in nine wells and thirteen wells, respectively <br /> As discussed to the Fourth Quarter 2005 Groundwater Monitoring Report (SECOR, 2006), detections of <br /> TCE and PCE are associated with the chlorinated cleaning solvent impacts at Lincoln Village Shopping <br />' Center located upgradsent of the site <br /> Summary and Conclusions <br />' The quarterly groundwater monitoring indicates the following <br />' • Results of the third quarter monitoring event are consistent with results of the first and second <br /> quarter sampling events for 2006 <br /> • Groundwater at the site flowed to the east-southeast at an approximate horizontal hydraulic <br />' gradient of 0 016 fVfl <br /> • Site-related constituents of concern were only detected above MDLs in groundwater samples at <br />' three monitoring wells Benzene was detected below the California Primary MCL at well MW- <br /> 11D, and just above the California Primary MCL at well MW-5 (2 µg/L) MTBE was detected <br /> above the California Primary MCL in monitoring well MW-8 <br />' • TCE and PCE were detected in groundwater samples, however, these compounds are associated <br /> with off-site impacts <br /> SBased on recent and historic groundwater monitoring results, a no further action required (NFAR) status <br /> is recommended for the site A NFAR request is currently being prepared for the site <br />' The next groundwater monitoring and sampling event has been tentatively scheduled for fourth quarter of <br /> 2006 If you have any questions or comments,please contact David Lay by telephone at (315) 671-9197 <br /> or by electronic mail at dlay@bbl-mc com or David Evans by telephone at (916) 843-1276 ext 226 or by <br />' electronic mail at devans@bbl-inc com <br /> Sincerely, <br />' BLASLAND, BOUCK&LEE, INC <br />' David W Lay, C P G Michael P Fleischner, P E <br /> Senior Geologist Principal Engineer <br />' JAS/lw `_ <br /> Qpo_ c�),rim, <br /> Attachments <br /> Figure 1 Groundwater Contour Map,July 19,2006 C 6)5 C 5 <br /> Figure 2 PCE Isoconcentration Contour Map, July 19, 2006 X GRA' ° <br /> 7, <br /> riv- <br /> 047603054 doc < 1\�ON\ %/ <br /> BLASLAND, BOUCK& LEE, INC <br />' an ARCADIS company <br />