Bongaigaon Refinery & Petrochemicals (BRPL) today reported a 80% decline in net profit at Rs 26.15 crore for the third quarter ended December 31, 2005 as against Rs 133.62 crore in Q3FY05.According to a release issued by BRPL to the BSE today, total income increased to Rs 1,598.44 crore in Q3FY06 from Rs 1,179.75 crore in Q3FY05.