Diesel fuel leaking from a mobile oil storage tank on a local farming operation may have caused an intially reported, 4 mile long oil sheen on the Alabama river. Dallas County EMA deployed boom and sorbents in the intitial response; however, their resources were exhausted. ADEM responded and requested assistence from EPA. OSC Dean Ullock was dispatch and hired USES as a response contractor. OSC Ullock and USES were on the river last night to delineate the impacted area and prepare a clean up strategy for today.