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3) Conduct pump test at the newly installed groundwater recovery well to determine <br /> feasibility of dewatering during overe\cavation of former UST area and/or <br /> dewatering in conjunction with vapor extraction <br /> 4) Conduct airsparging/vapor extraction pilot test using air sparging in conjunction with <br /> the installation of horizontal vapor collection piping within a backfilled trench that <br /> traverses the former UST area <br /> LIMITATIONS <br /> The discussion presented in this report is based on the following <br /> 1 The observations and data collected by field personnel <br /> `? The results of laboratory analyses performed by a state certified analytical laboratory <br /> 3 Our understanding of the i egulations of San Joaquin County and State of California <br /> Changes in groundwater conditions can occur due to variations in rainfall, temperature, <br /> local and regional water use, and local construction practices In addition, variations in <br /> the soil and groundwater conditions could exist beyond the points explored in this <br /> investigation State Certified Laboratory analytical results are included in this report <br /> This laboratory follows EPA and State of California approved procedures, however <br /> WEGE is not responsible for errors in these laboratory results <br /> The services performed by Western Geo-Engineers, a corporation under California <br /> Registered Geologist #3037 and/or Contractors License 4513857, have been conducted <br /> in a manner consistent with the level of care and skill ordinarily exercised by members of <br /> our profession currently practicing under similar conditions in the State of California and <br /> San Joaquin County Our work and/or supervision of remediation and/or abatement <br /> operations, active or preliminary at this site is no way meant to imply that we are owners <br /> of operators of this site Please note that the known contamination of soil and/or <br /> groundwater must be reported to the appropriate agencies in a timely manner No other <br /> warranty expressed or implied is made <br /> If you have any questions concerning this report or if we can be of further assistance, <br /> please do not hesitate to contact us at (530) 668-5300 <br /> ,t <br /> t "a 7 j r <br /> C t <br /> Jack E Nap p Ge rge Converse David Threlfall <br /> R G 93037 Project Manager Project Geologist <br /> 4 Sanchez QM 4-6, 2000 <br />