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• Page 2 Apnl 26, 2002 <br /> were reported in borehole C-517 Contamination with heavier fractions (purgeable <br /> C6-C12) were found in soil between 25 and 40 FT bgs in boreholes C-2 and C- <br /> 4/6, ranging upwards to extractable petroleum hydrocarbons of 15,500 mg/kg at <br /> 25 FT bgs in borehole C-5/7 <br /> Groundwater was sampled when encountered in the boreholes A detectable level <br /> of BTEX of 0 500 ug/L was found in borehole C-4/6 Diesel like, extractable <br /> hydrocarbons were identified in groundwater samples at boreholes C-1 C-2 C-3 <br /> ' C-4 C-5 and MW-No 1 <br /> Ground water was sampled from the single monitoring well in December 2000, <br /> April 2001, January 2002 and April 2002 <br /> Current Activity <br /> ' Following resumption of monitoring this year, it became apparent that additional <br /> characterization of contamination both on and off site would be required The San <br /> Joaquin County Public Health Services, Environmental Health Division (EHD) in <br /> their letter of April 2, 2002, to WOS's Mr Jeff Hopkins, reaffirmed the county's <br /> position and directed installation of at least two monitoring wells on site to confirm <br /> the on site ground water contamination and to provide data to calculate <br /> groundwater gradient flow direction Additionally, EHD directed that a 2,000 FT <br /> well survey be conducted The area is identified on the attached LOCATION MAP <br /> Permission to access, bore and sample from the adjacent property is required to <br /> continue the characterization It is being actively sought by the client (WOS) A <br /> work plan is currently being developed for submittal to EHDalong with application <br /> for test well drilling on the adjacent down gradient properties <br />