Investigations of Current Chromium Exposures Environmental and - - PowerPoint PPT Presentation

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Jun 23, 2023 41 likes •143 views

Investigations of Current Chromium Exposures Environmental and Occupational Health Sciences Institute Piscataway, NJ EOHSI Principal Investigators Dr. Paul Lioy Dr. Michael Gochfeld Co-Investigators Dr. Stuart Shalat Dr. Zhi-hua (Tina)

SLIDE 1

Investigations of Current Chromium Exposures

Environmental and Occupational Health Sciences Institute

Piscataway, NJ

SLIDE 2

EOHSI

Principal Investigators

Dr. Paul Lioy
Dr. Michael Gochfeld

Co-Investigators

Dr. Stuart Shalat
Dr. Zhi-hua (Tina) Fan

Field Team

Dr. Kathy Black

Marta Hernandez Stephanie Einstein

SLIDE 3

Results from 1990s Studies

Chromium levels in house dust were higher near uncontrolled waste sites Children’s exposure, measured by chromium in the urine, was linked to the levels in the house dust Only measured total chromium

SLIDE 4

Community Concerns

Not all sites have been remediated Some sites have interim remediation methods only Remediation has taken too long

SLIDE 5

Chromium Exposure Study Started in 2006: Two Phase Design

Phase 1: Is there a potential for exposure?

Use levels in house dust

Phase 2: Is there exposure?

Use levels in house dust and children’s urine

Can now measure Cr(VI) in dust

SLIDE 6

Results of Chromium Exposure Study Phase 1

Dust samples collected from 100 homes between Nov 2006 and May 2008; 2 to 3 samples were collected in each home. Cr(VI) found in all homes (average of 3.7 ppm) Six homes had a single high sample (over 20 ppm); no home had more than one high sample. Two homes continued to be high after re- sampling

SLIDE 7

Steps Post – Phase 1

Began Chromium Exposure Study Phase 2 Completed Background Study

Analyze dust samples from another urban NJ area for Cr(VI) Compare levels to those found in Jersey City

SLIDE 8

Background Study Results

Dust samples collected from 20 homes in the New Brunswick area between April and September 2008; 3 samples collected in each home. Cr(VI) found in all homes (average of 4.6 ppm) One home had a single high sample (over 20 ppm) No significant difference between the background area and Jersey City Sources of chromium not defined

SLIDE 9

Chromium Exposure Study Phase 2

Families with young children (6 years old or younger) Collect dust and urine samples $25 payment for participation This study is ongoing

SLIDE 10

Investigations of Current Chromium Exposures Environmental and - - PowerPoint PPT Presentation

Investigations of Current Chromium Exposures

Environmental and Occupational Health Sciences Institute

Piscataway, NJ

EOHSI

Principal Investigators

Co-Investigators

Field Team

Marta Hernandez Stephanie Einstein

Results from 1990s Studies

Chromium levels in house dust were higher near uncontrolled waste sites Children’s exposure, measured by chromium in the urine, was linked to the levels in the house dust Only measured total chromium

Community Concerns

Not all sites have been remediated Some sites have interim remediation methods only Remediation has taken too long

Chromium Exposure Study Started in 2006: Two Phase Design

Phase 1: Is there a potential for exposure?

Use levels in house dust

Phase 2: Is there exposure?

Use levels in house dust and children’s urine

Can now measure Cr(VI) in dust

Results of Chromium Exposure Study Phase 1

Dust samples collected from 100 homes between Nov 2006 and May 2008; 2 to 3 samples were collected in each home. Cr(VI) found in all homes (average of 3.7 ppm) Six homes had a single high sample (over 20 ppm); no home had more than one high sample. Two homes continued to be high after re- sampling

Steps Post – Phase 1

Began Chromium Exposure Study Phase 2 Completed Background Study

Analyze dust samples from another urban NJ area for Cr(VI) Compare levels to those found in Jersey City

Background Study Results

Chromium Exposure Study Phase 2

Families with young children (6 years old or younger) Collect dust and urine samples $25 payment for participation This study is ongoing

Phase 2 Study: For Interested Residents

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