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Problem Assessment Report November 20, 1990 <br /> Fire Engine Company No. 2, Stockton, California AGS 38009-2 <br /> RECOMMENDATIONS <br /> ® Based on the results of field and laboratory data obtained during <br /> this investigation, Applied GeoSystems recommends the following: <br /> o Purge and sample the existing groundwater monitoring wells,and analyze the <br /> samples for TPHg and BTEX. If the BTEX concentrations remain above the <br /> respective MCL and action levels,we recommend that the wells be monitored <br /> on a quarterly basis. <br /> o Evaluate remediation options for soil and ground water containing gasoline <br /> hydrocarbons. A preliminary summary of available remediation options is <br /> presented in Appendix E to this report. <br /> LIMITATIONS <br /> This report was prepared in accordance with generally accepted standards of environmental <br /> geological practice in California at the time this investigation was performed. This <br /> investigation was conducted solely for the purpose of evaluating environmental conditions <br /> of the soil and ground water with respect to hydrocarbons near the underground storage <br /> tanks. No soil engineering or geot,chnical references are implied or should be inferred. <br /> Evaluation of the geologic conditions at the site for the purpose of this investigation is made <br /> from a limited number of observation points, Subsurface conditions may vary away from <br /> the data points available. Additional work, including further subsurface investigation, can <br /> reduce the inherent uncertainties associated with this type of investigation. <br /> �y <br /> 18 <br /> Applied GeoSyste�ns <br /> MW vim HE Iii. <br />