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ANDOVER, Kan. (AP) — Eighteen families in a south-central Kansas neighborhood have filed a lawsuit accusing a pipeline company of contaminating their water, but the company denies the allegations and says it's working with the state to address their concerns. The lawsuit was filed in Sedgwick County District Court on behalf of homeowners in an area northeast of Andover and seeks $2.3 million in damages from San Antonio, Texas-based NuStar Pipeline Operating Partnership L.P. The case is scheduled for trial in 2014. The lawsuit accuses NuStar of refusing to clean up contamination from a 1990 pipeline rupture and claims the contamination has ruined property values. The Wichita Eagle reports that NuStar has owned the pipeline since 2005, and denies the allegations. The company also says residents have failed to show NuStar caused the contamination.