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WCL Condensed History – 1975-1996 <br />•1981 Volatile Organic Compounds and metals found <br />•1983 Ground water pump out for gradient control / spray irrigation for VOC removal <br />•1984 site added to US and MN Superfund lists <br />•1987-1995 Valley Branch Watershed District Project 1007 – pumped volume 50-80 M gal/yr <br />•1993 methane explosion in valve house – gas extraction system installed <br />•1995 site declared “no threat to public health” <br />•1996 Site removed from Superfund status and control transferred to Minnesota Landfill <br />Cleanup Program <br />•1996 New landfill cover and active gas extraction system with flaring planned