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Description: A well sampling survey was conducted to determine the presence of fenamiphos, fenamiphos sulfoxide, and fenamiphos sulfone in ground water. Wells were sampled in areas where use of fenamiphos coincided with areas of previous contamination by other pesticides, This was possible because fenamiphos is a restricted use pesticide so a spatial record of use was available and the CDFA’s Well Inventory Data Base contains spatial locations of historical pesticide detections in well water. Twenty-four wells were sampled in 16 sections in Fresno County, 12 wells were sampled in 8 sections in San Joaquin County and 5 wells were sampled in 3 sections in Kern County. No residues of fenamiphos or its sulfoxide and sulfone metabolites were detected in any of the samples.
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Subject: Pesticides -- Environmental aspects -- California, Groundwater -- Pollution -- California -- Measurement
Group: Environmental Protection Agency
Creator: Troiano, John J. (John James) , Turner, Bonnie, Miller, Nancy, California. Environmental Hazards Assessment Program
Language: English
Coverage: Fresno County (Calif.), San Joaquin County (Calif.), Kern County (Calif.)
Format: Government Documents
Description: The extent of contamination that occurs during soil sampling was examined for the split-barrel, hollow auger method used by the Environmental Hazards Assessment Program, California Department of Food and Agriculture, and for a manual bucket auger method. The study was conducted at Fresno, California on a sandy soil of the Hanford series. Contamination was measured by applying tracer to the surface of soil, immediately followed by sampling to a 10 foot depth in 6-inch segments. The tracer contained bromide which was not found in background samples. Thus, the presence of bromide in samples below the surface layer indicated contamination of samples. Three 6-inch samples were taken at one time with the split-barrel method whereas single 6-inch samples were obtained with the hand auger.
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Subject: Soils--Sampling, Soil pollution -- California -- Measurement
Group: Environmental Protection Agency
Creator: Troiano, John J. (John James) , California. Environmental Hazards Assessment Program
Language: English
Coverage: California
Format: Government Documents
Date: 1987 August
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