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i <br /> 4i —. <br /> ^' April 25, 1990 <br /> Page 2 <br /> µ' <br /> an <br /> present. a groundwater contamination a4 MW-2 appears to also be limited to <br /> immediately beneath the location of the former waste oil tank. <br /> T We understand thst Bio National Corporation has been extracrin� water from <br /> MW-1 and treating the -water at the surface using ultraviolet, ozone and carbon <br /> filter methodologies. As the levels of contaminants appear to be declining in <br /> MW-1, continued extraction and treatment m:�y bring these levels down to values <br /> acceptable to the Ri�gional Water Quality Control Board and San Joaquin County <br /> Public Health Services. Similar extraction and treatment at MW-2 may be <br /> - warranted. <br /> After submission of this report, further discussions should be held with <br /> both of the above agencies to determine clean-up levels for groundwater <br /> acceptable to them for the Holt Brothers facility. Please feel free to contact <br /> us if you have any questions concerning this report. <br /> Sincerely, <br /> DAMES & MCQRE <br /> Graeme W. Nyland <br /> Senior Engineering Geologist <br /> �•f uane G. Bal-h <br /> Project Manager, Ru #3807 <br /> - to <br /> 6«: DCS/sd <br /> { <br /> 4 <br />