The sediment, as shown in figure 5, was analyzed by GC-2010 gas chromatography with FID detector, equipped with DB-WAX column (30 m * 0.25 mm I.D) and injector at 180 *C with split ratio 180. An oven starting temperature of 180 *C was programmed at 5 *C/min up to 230 *C and hold for 15 min. Detector temperature was 250 *C, according to EN 14103. For EN 14105, GC-2010 gas chromatography provided with DB-1HT column ( 15 m * 0.32 mm I.D) and injector at 370*C with split ratio 5.0. Gradient temperature of oven was set as follow 60 *C hold for 1 min, programmed at 15 *C/ min up to 180 *C programmed at 7 *C/min up to 230 *C, programmed at 10 *C/min up to 370 *C, final temperature hold for 5 min.