Pengaruh Surfaktan Linear Alkylbenzena Sulfonat dalam Mempercepat Bioremediasi Limbah Minyak Bumi. (Studi Kasus : Pengelolaan Lingkungan di Lapangan Minyak Duri-PT Caltex Pacific Indonesia, Riau) = The Effect of Linear Alkylbenzena Sulfonate Surfactant in Accelerating Bioremediation of Oil Waste (A Case Study : Environmental Management in Duri Oil Field - PT Caltex Pacific Indonesia, Riau)