Review Of ATSDR Spring Valley Exposure Investigations
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Review Of ATSDRS
pring Valley Exposure Investigations
pring Valley Exposure Investigations
Slide 2
Susan W. Metcalf, MD.
Agency For Toxic Substances And Disease Registry
Agency For Toxic Substances And Disease Registry
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Exposure Investigations
Date | Participants | |
---|---|---|
AU Child Development Center | Feb 2001 | 28 children 4 adults |
Spring Valley I | March 2002 | 23 adults 9 children |
Spring Valley II | July-Nov 2002 | 34 adults 6 children |
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Child Development Center
- Soil arsenic levels
- 57 ppm average
- 498 ppm highest hit
- Children immediately relocated
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Results Of Hair Analysis
- 24 samples: no arsenic detected
- 8 samples: 0 .10ppm to 0 .14 ppm arsenic
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Background Hair Arsenic Levels
- Textbooks: < 1 ppm
- National Research Council 0.2 ppm
- NCEH: 95th percentile: 0.28 ppm
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Spring Valley I
- 20 homes with the highest composite samples
- 62-202 ppm
- Arsenic analyzed
- Hair
- Urine
- House dust
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Spring Valley I Results
- Hair samples
- 6 non-detects
- 19 (.07-.73 ppm)
- House dust samples< -13 homes
- 0-63 ppm
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Spring Valley I Results
- Total urine arsenic
- Range 0-210 µg/L
- Speciated urine arsenic
- 10,12,15 µg/L
- BEI : 35 µg/L
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Spring Valley I Conclusions
- Urine and hair arsenic levels are consistent with background exposure
- These levels would not be expected to be associated with health problems
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Spring Valley II: Eligibility
- Participation in previous EI
- Living on or adjacent to properties as they were being remediated
- Single elevated level of arsenic on property
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Spring Valley II
- Total urine arsenic
- Range 0-76 µg/L
- Speciated urine arsenic
- 10, 14, 29 µg/L
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Spring Valley II Conclusions
- Overall, there was no significant arsenic exposure in the population
- 3 individuals had measurable levels of inorganic arsenic that would not be expected to cause health problems
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Spring Valley I & II
- 19 participants
- Urinary arsenic measured in both investigations
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Spring Valley I & II
Speciated Arsenic
Speciated Arsenic
- 17/19 participants
- Speciated arsenic < 10 µg/L in both investigations
- 2 individuals
- Speciated arsenic >10 µg/L in at least one investigation
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Individual 1
Total As (µg/L) | Inorganic As (µg/L) | |
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EI I | 94 | 15 |
EI 2 | — | Non Detect |
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Individual 2
Total As (µg/L) | Inorganic As (µg/L) | |
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EI I | 26 | 12 |
EI 2 | 34 58 |
Non Detect 29 (13.4 µg/g creatinine) |
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Conclusions
- All the arsenic levels found in our testing are below those associated with health problems
Page last reviewed: September 22, 2015
Content source: Agency for Toxic Substances and Disease Registry