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#           Occurrence of pesticides in groundwater and sediments and mineralogy of sediments and grain coatings underlying the Rutgers Agricultural Research and Extension Center, Upper Deerfield, New Jersey, 2007      

      May 6, 2014    

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Water and sediment samples were collected from June through October 2007 from seven plots at the Rutgers Agricultural Research and Extension Center in Upper Deerfield, New Jersey, and analyzed for a suite of pesticides (including fungicides) and other physical and chemical parameters (including sediment mineralogy) by the U.S. Geological Survey. Plots were selected for inclusion in this study on the basis of the crops grown and the pesticides used. Forty-one pesticides were detected in 14 water samples; these include 5 fungicides, 13 herbicides, 1 insecticide, and 22 pesticide degradates. The following pesticides and pesticide degradates were detected in 50 percent or more of the groundwater samples: 1-amide-4-hydroxy-chorothalonil, alachlor sulfonic acid, metolachlor oxanilic acid, metolachlor sulfonic acid, metalaxyl, and simazine. Dissolved-pesticide concentrations ranged from below their instrumental limit of detection to 36 micrograms per liter (for metolachlor sulfonic acid, a degradate of the herbicide metolachlor). The total number of pesticides found in groundwater samples ranged from 0 to 29. Fourteen pesticides were detected in sediment samples from continuous cores collected within each of the seven sampled plots; these include 4 fungicides, 2 herbicides, and 7 pesticide degradates. Pesticide concentrations in sediment samples ranged from below their instrumental limit of detection to 34.2 nanograms per gram (for azoxystrobin). The total number of pesticides found in sediment samples ranged from 0 to 8. Quantitative whole-rock and grain-coating mineralogy of sediment samples were determined by x-ray diffraction. Whole-rock analysis indicated that sediments were predominantly composed of quartz. The materials coating the quartz grains were removed to allow quantification of the trace mineral phases present.

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#### Timothy Reilly

##### Environmental Health Deputy Program Coordinator

Ecosystems Mission Area

tjreilly@usgs.gov

609-771-3962

####             Mark Sandstrom, Ph.D. (Former Employee)          

##### Research Chemist

Water Resources Mission Area

#### Michelle L Hladik, PhD

##### Research Chemist

California Water Science Center

mhladik@usgs.gov

916-278-3183

#### Adam Boehlke

##### Geologist

Central Energy Resources Science Center

aboehlke@usgs.gov

303-236-1629

####             Kathryn Kuivila (Former Employee)          

##### Scientist Emeritus

Oregon Water Science Center

## Related Content

#### Timothy Reilly

##### Environmental Health Deputy Program Coordinator

Ecosystems Mission Area

tjreilly@usgs.gov

609-771-3962

####             Mark Sandstrom, Ph.D. (Former Employee)          

##### Research Chemist

Water Resources Mission Area

#### Michelle L Hladik, PhD

##### Research Chemist

California Water Science Center

mhladik@usgs.gov

916-278-3183

#### Adam Boehlke

##### Geologist

Central Energy Resources Science Center

aboehlke@usgs.gov

303-236-1629

####             Kathryn Kuivila (Former Employee)          

##### Scientist Emeritus

Oregon Water Science Center

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