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_ Ss '. x <br /> -`Y`� 'kRM <br /> ra=*-"�'ry dti *xr _ r • ` - ;e a —e x z• r• 1 cmc <br /> . M m...' ,"" <br /> r�-u. <br /> WORK PLAN FOR TANK REHOV" AND SOIL EXCAVATION <br /> t CHEVRON SERVICE STATION NO. 9-0557 <br /> w•r 3.39 SOUTH CENTER STREET <br /> STOCKTON, CALIFORNIA <br /> ,w NOVEMBER 1989 <br /> INTRODUCTION <br /> The following is a work plan for removal of the underground <br /> storage tanks at Chevron U.S.A. Inc. (Chevron) Service Station <br /> Nc 9-0;57 located at 139 South Center Street in Stockton, <br /> California (Figure 1) . In addition to the tank removal work, if <br /> e_ sails impacted by released hydrocarbons are encountered during <br /> tank removal, the soils will be excavated to the apparent limits <br /> of contamination or to limits imposed by the excavateion equipment <br /> and/or the safety of off-site structures. While there is no <br /> evidence that a subsurface release of fuel hydrocarbons has <br /> occurred at this site, it has been Groundwater Technology, Inc. 's <br /> - (GTI) experience that many older service stations will have some <br /> levels of soil contamination associated with the underground <br /> tanks. Even if the tanks and piping are intact, minor spills can <br /> easily have occurred during fuel deliveries. Groundwater <br /> Technology, Inc. ,believes that if impacted soils are encountered <br /> during the tank removal process, immediate removal of this soil <br /> will greatly reduce the total time and expense required to <br /> completely remediate a given site. <br /> t <br /> This plan addresses the removal of the four underground <br /> tanks currently on site and, if required, the excavation of <br /> hydrocarbon-impacted soils. If impacted soils are encountered <br /> -- and field evidence indicates that hydroc&rbons may have entered <br /> the groundwater beneath this site, GTI proposes to also install <br /> groundwater monitoring wells to assess groundwater quality <br /> beneath the site. <br /> QIOUNDW.ATER <br /> TECHKOIAGY,ISC. <br />