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1 <br /> E E <br /> Ms. Evelyn Hubei <br /> February 25, 1999 <br /> Page 7 i <br /> Recommendations <br /> Based on the analytical results of the soil and groundwater samples collected from the subject <br /> site, it does not appear that subsurface soil has been adversely impacted by activities l <br /> associated with 9 floor drains 4 of the 5 hydraulic auto body lifts, and the former ASTs and <br /> drum storage area at the subject site. However, one soil sample collected from a boring <br /> advanced adjacent to the southernmost hydraulic lift contained elevated levels of TPH as motor <br /> F oil. The impacted soil likely resulted from the release of hydraulic oil from a subgrade hydraulic <br /> 4 lift reservoir. ENSR recommends that the petroleum-impacted soil be excavated and properly <br /> disposed of when this hydraulic lift is removed from the site. <br /> ENSR has reviewed a letter issued by the San Joaquin County Public Health Services, <br /> Environmental Health Division that indicates that no further action is required at the site related <br /> to the UST release. The Central Valley Regional Water Quality Control Board has also <br /> indicated, in a letter dated January 28, 1999, that no further action is required at the subject site <br /> related to the UST release. As site closure has been granted relative to the UST release, <br /> ENSR recommends that the 4 existing groundwater monitoring wells located onsite be properly <br /> abandoned in accordance with applicable laws and regulations. <br /> Study Limitations <br /> This report describes the results of ENSR's Phase II investigation to identify the potential <br /> presence of contaminants beneath the subject site. In the conduct of this investigation, ENSR <br /> has attempted to independently assess the potential presence of such a problem within the <br /> limits of the established scope of work as described in our proposal. <br /> This report and all field data and notes where gathered and/or prepared by ENSR in <br /> accordance with the agreed upon scope of work and generally accepted engineering and <br /> scientific practice in effort at the time of ENSR's investigation of the sites. The statements, <br /> conclusions, and opinions contained in this report are only intended to give approximations of <br /> the environmental conditions at each site. Moreover, there are several major modifications that <br /> are inherent in the conduct of this or any other environmental due diligence examinations. <br /> It is difficult to predict which, if any of the potential environmental issues identified will become <br /> actual problems in the future. f=ederal and state environmental regulations continually change, <br /> as do the enforcement priorities of the applicable government agencies involved. <br /> Even for problems currently identified, it is often difficult and sometimes impossible to i <br /> accurately estimate the liabilities that may be involved in remedying the problem(s). The legal <br /> and technological standard for evaluating, remedying, environmental problems tends to be <br /> C highly dependent upon agency negotiations and the sometime arbitrary and unpredictable ! <br />