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detected in groundwater samples collected from wells MW-13, MW-14, MW-24, VM-1 and VM-2 at <br /> concentrations ranging 14 to 6,800 gg/I Toluene, ethylbenzene and total xylenes were also detected <br /> in wells MW-13, MW-l4, MW-24, VM-I and VM-2 at concentrations ranging from 2 2 to 930 gg/l <br />' TAME was detected in the groundwater samples collected from wells MW-14 and VM-2 at <br /> concentrations of 53 and 230 µg/l, respectively MTBE, DIRE, TBA and ETBE were not detected <br /> above laboratory method detection limits in each of the groundwater samples collected TPHg, <br />' TPHd, benzene, MTBE and TAME concentrations for the First Quarter - 2002 monitoring event are <br /> depicted on Figure 3, Petroleum Hydrocarbons in Groundwater-May 2002 <br />' CONCLUSIONS .AND RECOMMENDATIONS <br /> The lateral limits of dissolved phase petroleum hydrocarbons appear to be limited to the former UST <br />' excavation area in monitoring wells MW-14, VM-1 and VM-2 Geocon recommends that quarterly <br /> groundwater monitoring continue at the Site to evaluate seasonal trends in groundwater elevation and <br /> contaminant concentrations in the vicinity of the former UST locations The next groundwater <br />' monitoring event is scheduled for July 2002 <br /> If there are any questions concerning the contents of this report, or if Geocon may be of further <br />' service, please contact the undersigned at your convenience <br /> Sincerely, <br /> ��pFESSIp�,� <br />' GEOCON CONSULTANTS, �Q� �3VH�q� �� <br /> ��ccTT <br /> gi <br /> M Jo nE CE �o.46s0103J! Rebecca REA <br /> , {x SV 06i t`� , <br /> of anager N), CI��L ���/ Project Environmental Scientist <br />' RLS JEJ krc 9T�OF CAS-��O <br />' (5) Addressee <br /> Attachments Figure 1, Vicinity Map <br />' Figure 2, Groundwater Elevation Map- May 2002 <br /> Figure 3, Petroleum Hydrocarbons in Groundwater- May 2002 <br />' Table 1, Summary of Groundwater Elevation and Analytical Data <br /> Appendix A, Summary of Historical Groundwater Analytical Data <br />' Appendix B,Monitoring Well Sampling Data Sheets <br /> Appendix C, Laboratory Reports and Chain of Custody Records <br /> 1 <br /> Project No 58475-06-24 -3- June 21,2002 <br />