| use of the p,p'-ddd: p,p'-dde concentration ratio to trace contaminant migration from a hazardous waste site. | for approximately 50 years, beginning in the 1920s, hazardous wastes were disposed in an 11-hectare area of the marine corps base (mcb) quantico, virginia, usa known as the old landfill. polychlorinated biphenyls (pcbs) and ddt compounds were the primary contaminants of concern. these contaminants migrated into the sediments of a 78-hectare area of the potomac river, the quantico embayment. fish tissue contamination resulted in the mcb posting signs along the embayment shoreline warning fisherme ... | 2006 | 16758288 |