The Denver oil and gas company K.P. Kauffman, long under pressure to fix what regulators said were multiple violations, including spills, has lost the ability to sell its product and could lose its license to operate if it doesn’t comply with all state rules in six months. The decision by the Colorado Oil and Gas Conservation Commission on Wednesday follows the approval of a comprehensive cleanup plan in November 2021, multiple hearings and numerous meetings and discussions that the COGCC staff said yielded few results. Other complaints against KPK were leaking flowlines, which carry oil and gas from wells; contaminated soil dumped on a field the company owns with a pond and wetlands nearby; and failure to turn in timely and accurate reports. In a hearing last week, staffers said only three of 58 projects had been completed.