OKLAHOMA CITY (AP) — An Oklahoma auditor says a cleanup contract for the heavily polluted Tar Creek Superfund site cost five times more than it should have.

Auditor Gary Jones renewed his call for a 2011 audit on Monday. He accused the attorney general's office of covering up corruption at the site "by withholding a public document, paid for with public funds and conducted on behalf of the public."

Jones alleged that the Lead-Impacted Communities Relocation Assistance Trust "spent over $3.6 million on a project when the cost could have been less than $600,000."

Jones also accused former Attorn...