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Benzene and Xylene showed a slight increase in concentration compared to the second <br /> ' quarter of 1994. <br /> The down gradient extent of the hydrocarbon plume has not been determined. Additional <br /> monitoring wells will be necessary to determine the lateral extent of the plume. Because of <br /> structures currently at the site, at Ieast one monitoring well will need to be installed in the <br /> City of Stockton right-of-way along Harding Way, north or northwest of the site. <br /> Since a consistent northwest groundwater flow direction has been determined at the site, the <br /> ' San Joaquin County PHS/EHD has agreed that monthly groundwater depth measurements <br /> are no longer necessary. Therefore, GeoAudit is currently preparing a work plan for the <br /> installation of two additional monitoring wells at the site. Both wells will be installed off the <br /> ' site. If proposed well locations are in the City of Stockton right-of-way, encroachment <br /> permits will have to be obtained. <br /> ' 6.0 LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily <br /> ' exercised by environmental consultants practicing in this or similar localities. The findings <br /> were mainly based on analytical results provided by an independent laboratory. No other <br /> warranty, expressed or implied, is made as to the professional recommendations contained <br /> ' in this report. <br /> 1 <br /> 1 <br /> G-1.0M ti&�� [.c. 12 <br /> Heu-IABoi QA3l10.949'73 <br />