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direction at the site is nortImest Fl0«e\eI, GeoAudit recommends continuing monthly <br /> ' monitoring at the site through the second quarter of 1995 <br /> 52 Petroleum hydrocarbon Impacted Soil <br /> ' The lateral extent of the impacted soil has not been determined Additional assessment will <br /> be necessary to determine the extent of impacted soil and to design an appropriate <br /> remediation system Assessment of the impacted soil will require the drilling of soil borings <br /> on the Jimco property north of the RFS site <br /> GeoAudit is currently preparing a work plan for the drilling and installation of additional <br /> soil borings and monitoring wells At least two of the proposed borings will be located on <br /> the Junco property once an access agreement is Granted <br /> 5.3 Petroleum Hydrocarbon Impacted Gr ound%%ater <br /> Petroleum hydrocarbons continue to be detected in around%vater samples from each <br /> ' monitoring \yell at the site %IW-2 continues to ha\e the highest concentration of <br /> hydrocarbons <br /> ' Although MW-2 was down-gradient of the former UST locations duiing the No\enber <br /> sampling e\ent, the groundwater flow duectron in the region can fluctuate as much as 1800 <br /> as indicated in Section 5 1 <br /> Backgiound research of the Junrco Tiuck Stop site indicates that USTs and dispensers are <br /> located on the piopeity The research also indicates that seveual unauthoiuzed releases of <br /> petroleum hydrocarbons have been repouted in the past Considering the fluctuatuna <br /> gioandwater flow direction in the region (lie possibility exists that hydiocaibons front a <br /> ' release on the Junco site may lime impacted soil and/or Groundwater on the Ripon Faun <br /> Service property <br /> To define the lateral and vertical extent of petroleum hJdiocaibons at the Ripon Farm <br /> Seivice site, we recommend the drilling and installation of t\vo additional groundwater <br /> monitojing wells One monitoring well will be located directly south of MW-3, a second <br /> ' monitoring well will be located in the northwest corner of the RFS property <br /> ' 6 0 LIMITATIONS <br /> Oui professional services were performed using that degree of care and skill oidinanly <br /> ' exercised by environmental consultants practicing in this or similar localities The findings <br /> were based upon analytical results provided by an independent laboratory Evaluations of <br /> the geologuc/hydrogeologuc conditions at the site for the purpose of this investigation aie <br /> made from a limited number of available data points (r a monrtoiing wells) and subsurface <br /> Rin F�r.n S.rvax QR 2959}5 <br />