US EPA

2179341 

Journal Article 

Aerial fallout of DDT in southern California 

Young, DR; Mcdermott, DJ; Heesen, TC 

1976 

Yes 

Bulletin of Environmental Contamination and Toxicology
ISSN: 0007-4861
EISSN: 1432-0800 

PESTAB/77/0268 

16 

5 

604-611 

English 

990530 

10.1007/BF01685371 

https://search.proquest.com/docview/83573119?accountid=171501
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PESTAB. As part of a continuing series of studies into the input of DDT and other chlorinated hydrocarbons into the Southern California Bight the levels introduced by dry aerial fallout of DDT were examined. Glass plates covered with mineral oil were left on a flat surface, generally a low building roof, for one week, then the collected material cleaned off by scraping and respraying with mineral oil-hexane. The samples were cleaned up by column chromatography and analyzed by gas chromatography. Seasonal differences in DDT flux were not apparent. The levels found over a coastline area from Point Conception to the US-Mexico border ranged from ca. 50 to almost 700 ng/m2/day in 1973-74. The results generally increased with increasing proximity of the sampling station to Los Angeles rather than to the agricultural regions. The ratio of p,p'-DDT to o,p'-DDT observed in the Bight was 2.5:1, and these two isomers constituted approximately 70% of the total measurable flux of DDT compounds onto the Bight. Sampling stations were established near the site of a plant that formerly produced DDT and near the landfill that received the wastes from this plant up to 1972. DDT constituents collected here were at least an order of magnitude higher than elsewhere in Los Angeles. It was estimated from the results that about 1.3 metric tons/yr of DDT compounds fell onto the coastal waters annually in 1973-1974. 

Air Pollutants; Dichlorodiphenyl Dichloroethylene; 4M7FS82U08; CIW5S16655; Dichlorodiphenyldichloroethane; V14159DF29; Index Medicus; Chemistry; Chemical Phenomena; Dichlorodiphenyldichloroethane -- analysis; California; Isomerism; Air Pollutants -- analysis; Dichlorodiphenyl Dichloroethylene -- analysis; DDT -- analysis