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ii <br /> Project No. 58080-06-02 3 <br /> September 30, 1994 <br /> s. Page 3 sE <br /> the north and east of the site. ;Based on the.distribution of''residual TPHg and TPHd in soil, soil <br /> vapor extraction and enhanced insitu bioremediation appear,to be the most appropriate remedial <br /> technology to reduce the mass of petroleum hydrocarbon in the vadose zone. Therefore, the <br /> following"Workplan" includes the installation of additional vapor extraction wells, the performance <br /> Of a vapor extraction pilot test, an evaluation of -alternative remedial technologies and the <br /> preparation of a Problem Assessment Report (PAR). A PAR will be,prepared if the proposed <br /> additional assessment is successful in establishing the limits of petroleum hydrocarbons in soil and <br /> groundwater. <br /> WORKPLAN G, <br /> 3 Based upon the above information: and the specific:requirements cif the FM,And the SJGEHD, <br /> j Geocon proposes the following scope of services: <br /> ;I <br />� rl <br /> i Task J-Prefeld Activities <br /> Prepare and`submit well permit applications and fees to the SJCEHD to obtain weft <br /> permits for two groundwater monitoring wells and three to five. vapor extraction <br /> wells <br /> .i <br /> Pxepare and submit encroachment permit applications and traffic plan to the City <br /> of .Lodi Public Works Department for the installation of two groundwater <br /> monitoring wells in the public right-of-ways. <br /> VV Contact the local public utilities via Underground. Service Alert, to attempt to' <br /> delineate subsurface public 'utilities and conduits in proximity to.-the proposed , <br /> goring/well locations. <br /> Retain the services of..a Mate of California; C-51 1166 ed drilling company to <br /> perform the soil borings and well installations.: <br /> Task It, GeophXsical Survet+= i <br /> Perform a geophysical survey to attempt to tocate:potential abandoned.US`i's and f <br /> product`:vent piping associated with the former�seruice station�aperations at the site: <br /> The survey would be performed using ground penetrating radar(OPR)at a selected. <br /> grid interval:across the parking,perimeter landscaping,sidewalk and adapt street <br /> areas. Prier to the.GPR.,survey, the existing utilities would be located using;pipe. <br /> and cable locating .;quipment. f <br /> Task III - Soil Borings <br /> it <br /> • Advance eight exploratory Borings (GB-6 through GB; 1, 1 IW-4 and.M at the <br /> s� <br /> }} <br /> it <br />