Arsenic in the Soils of Northwest Oregon

Ricker, Tracy Ryan

doi:10.15760/etd.927

Cited by 2 publications

(3 citation statements)

References 28 publications

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“…This site was mapped as the Eugene Formation, a marine sedimentary deposit, by both Walker and MacLeod (1991) and McClaughry et al (2010). Marine sediments were also found to have the highest (>7 ppm) concentrations of arsenic in the northwest Oregon study area (Ricker, 2013).…”

Section: Chapter Vii: Conclusionmentioning

confidence: 95%

“…Risk-based concentrations for arsenic in soils in Oregon were based on duration of exposure and ranged from 0.4 to 1.7 ppm for residential and occupational environments (Table 1). Studies in northwest Oregon (Ricker, 2013) have shown most natural soil samples are above that number. To move away from RBC's and refine cleanup standards, an understanding of natural background levels of arsenic and other elements in soils is needed.…”

Section: Purpose and Scopementioning

confidence: 98%

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Naturally Occurring Background Levels of Arsenic in the Soils of Southwestern Oregon

Hurtado¹

2000

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Dr. Scott Burns, your encouragement and confidence has made the process of creating this Master's thesis much more enjoyable than I imagined it could be. Also, I learned a lot from you! David Anderson from DEQ and Neil Morton from GeoEngineers, Inc. were both invaluable resources for questions I had regarding the DEQ data set. I thank Kassandra Lindsey and Aubrey Frimoth for being my post-surgery arms and legs with their physical contributions (digging many holes) and can-do attitude in the field. Classmates Traci Parker and Kimberly Yazzie joined me in playing with my data for a class project, helped troubleshoot appropriate analyses for the data and traded ideas for what the results may imply. To my immediate family: thank you, parents, for emotional support and perspective, always. I also very much appreciate my dog, Daisy, who has kept my toes warm while snuggled under my desk during all of my higher education. My fantastic husband, Josh, with his patience of steel, earns my lifetime of gratitude; he has sacrificed many date-nights through both my Bachelor's and Master's education. Josh, without your sense of humor and support, I would not have had the fun and focus that I am grateful to have experienced through these degrees. Last but not least… Liam, welcome to the world, my son! v

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Section: Chapter Vii: Conclusionmentioning

confidence: 95%

Section: Purpose and Scopementioning

confidence: 98%

Naturally Occurring Background Levels of Arsenic in the Soils of Southwestern Oregon

Hurtado¹

2000

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“…As is lowest in the volcanic soils and both marine sediment and loess soils have similar values. This makes sense since As in Oregon is attributed to tuffs and marine sediments from the Coast Range and not to basalts (Ricker, 2013). The As in the loess soils seems to be coming from the loess itself and not the volcanic bedrock.…”

Section: Soil Chemistrymentioning

confidence: 99%

The Terroir of Pinot Noir Wine in the Willamette Valley, Oregon : A Broad Analysis of Vineyard Soils, Grape Juice and Wine Chemistry

Barnard¹

2000

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Terroir is determined by a combination of factors in the vineyard including the grape varietal, geology and soil, soil hydrology, physiography, and climate. Although most studies have examined regional differences in wine flavors and associated provenance of wine based on chemistry, few have examined the chemistry of the soil and the ability to trace that chemistry to grape juice and, finally, to the wine. This dissertation examines what soil physical and chemical differences specific to this region might influence grape juice chemistry and wine chemistry.Wine-grapes in the Willamette Valley, Oregon, are grown on three major soil parent materials: volcanic, marine sediments, and loess/volcanic. Winemakers have observed differences in the flavor of Pinot Noir wine made from grapes grown on these different parent materials. This dissertation examines differences in the soil properties and elemental chemistry of the soil parent materials at various vineyards to document their effect on wine chemistry as a step towards understanding differences in flavor. All aspects of the terroir are controlled by carefully selecting vineyards with similar exposure and elevation, the same grape varietal and wine making techniques, and only the soils vary. The hypothesis is that the chemistry of the grape juice and wine reflect the soil in which the grapes were grown and that the three parent materials have soils that can be distinguished by their physical and chemical characteristics.ii Soil pits were excavated in 20 vineyards, soil properties were described in the field, and soil samples were later analyzed in the laboratory particle size, organic matter, color, pH, cation exchange capacity (ammonium acetate method), clay mineralogy (x-ray diffraction), and elemental chemistry (ICP-MS/AES). X-ray fluorescence was used to examine the pisolites. ICP-MS/AES was used for elemental analysis of grape juice and wines produced from these vineyards. Principal component analysis was used to compare soil physical and chemical characteristics, grape juice and wine chemistry.

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Arsenic in the Soils of Northwest Oregon

Cited by 2 publications

References 28 publications

Naturally Occurring Background Levels of Arsenic in the Soils of Southwestern Oregon

Naturally Occurring Background Levels of Arsenic in the Soils of Southwestern Oregon

The Terroir of Pinot Noir Wine in the Willamette Valley, Oregon : A Broad Analysis of Vineyard Soils, Grape Juice and Wine Chemistry

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