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Soil and Groundwater Investigation Re ort <br /> ARCO Facility No 6080 <br /> Lathrop,California <br /> Page 5 <br /> • Soil and groundwater samples collected from boring/monitoring well MW-3 <br /> tested below method detection limits for all compounds analyzed, and <br /> • MTBE was detected in groundwater samples collected from MW-1 and MW-2 <br /> Limitations <br /> This report was prepared in general accordance with accepted standards of care that <br /> existed at the time this work was performed No other warranty, expressed or implied is <br /> made Conclusions and recommendations are based on field observations and data <br /> obtained from this work and previous investigations It should be recognized that <br /> definition and evaluation of geologic conditions is a difficult an inexact art Judgements <br /> leading to conclusions and recommendations are generally made with an incomplete <br /> knowledge of the subsurface conditions present More extensive studies may be <br /> performed to reduce uncertainties This report is solely for the use and information of our <br /> client unless otherwise noted <br /> If you have any questions, please contact Jay Johnson at (530) 676-6000 <br /> Sincerely, <br /> DELTA ENVIRONMENTAL CONSULTANTS, INC. <br /> • 45 , L <br /> M;v <br /> 01 <br /> Scott Bittinger Aa son, R G No 867 <br /> Staff Geologist anager <br /> Attachments Table 1 Soil and Groundwater Analytical Summary and <br /> Groundwater Elevation Data <br /> Figure l Site Location Map <br /> Figure 2 Site Plan <br /> Figure 3 Groundwater Contour Map <br /> Appendix A Soil Boring Logs <br /> Appendix B Field Data Sheets <br /> Appendix C Certified Analytical Results with Chain-of-Custody <br /> Documentation <br /> cc Mr Paul Supple, Atlantic Richfield Company <br /> C 1Arco1608MReports\Soi1&Groundwater Investigation doe <br /> i <br />