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NEW RESULTS IN LEAD POISONING PREVENTION: Windows, porches and dust lead standards Jonathan Wilson, Deputy Director David Jacobs, Director of Research.

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Presentation on theme: "NEW RESULTS IN LEAD POISONING PREVENTION: Windows, porches and dust lead standards Jonathan Wilson, Deputy Director David Jacobs, Director of Research."— Presentation transcript:

1 NEW RESULTS IN LEAD POISONING PREVENTION: Windows, porches and dust lead standards Jonathan Wilson, Deputy Director David Jacobs, Director of Research National Center for Healthy Housing

2 Porch Options to Restore Children’s Health The PORCH Study Jonathan Wilson, Sherry Dixon, David Jacobs, Judith Akoto, Katrina Korfmacher, and Jill Breysse

3 Background  No standards exist for exterior PbD  EPA cited a lack of data for not proposing a standard Previous studies have documented high porch dust lead levels (PbD): Rochester (1992)  92 µg/ft2 homes with EBLs  48 µg/ft 2 homes without EBLs Milwaukee (2002)  77 µg/ft 2 by porch railing  59 µg/ft 2 by front steps  2.5 times the avg. interior floor PbD

4 HUD OHHLHC FUNDER: National Center for Healthy Housing PRIME RESEARCHER: 12/2008 – 12/2012 PROJECT PERIOD: Rochester, NY LOCATION: City of Rochester University of Rochester Action for a Better Community (CAA) PARTNERS: PORCH Study

5 Objectives  Analyze existing dust and blood data from 125 homes in the Rochester Lead in Dust study (1992) to consider exterior dust lead standard  Quantify dust lead levels on porches of units undergoing lead hazard control and determine likely sources of the dust lead  Investigate the feasibility of maintaining reductions in dust lead loadings for up to a year following lead hazard control

6 Blood Lead Analysis  Child blood lead levels predicted by:  Exterior deterioration (roof, walls/siding, windows/doors, or foundation)  Interior floor PbD  Porch floor PbD  Window sill PbD if children put their mouths on the sill  Presence of a neighborhood lead point source  Sill surface condition  Attempts to define a specific porch dust lead standard were inconclusive

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8 Data Collected  Out of 102 dwellings enrolled in Rochester LHC program with porches, 79 dwellings were treated and tested at baseline, post-work and one-year post-work  Visual condition of exterior paint  Porch dust lead (by steps, door, and railing)  Type and condition of porch floor surface  Soil lead  Soil coverage  Presence of local point sources  Weather conditions

9 Baseline Results 68 µg/ft 2 (Steps and Entry: 47 µg/ft 2; Railing: 86 µg/ft 2 ) Porch Floor PbD 58% painted wood (92% had LBP) Surface Type: 76% Fair Surface Condition: 82% dwellings; 1,004 ppm* Foundation Bare Soil: 18 µg/ft 2 Interior Floor PbD:

10 Predictive Factors of Porch PbD  Sample location – Railings are higher  Surface condition  Climatic conditions (lower PbD if unpainted and wet)  Floor paint lead level  Condition of other porch surfaces  Not significant:  Soil, exterior condition, cleanliness, season  Neighborhood point sources significant post-work

11 Effects of Exterior Lead Hazard Control Porch Floor Treatment (n) Baseline (µg/ft 2 ) Post- Work (µg/ft 2 ) One- Year (µg/ft 2 ) Remove/Replace (45)9141**21** None (27)3671**42 Paint Stabilization (7)11956**33** All (79)685128** **p<0.05 compared to baseline

12 Predicted One-Year Effects by Baseline PbD

13 Key Findings  Porches are an exposure source that must be considered  Porch PbD is correlated with interior PbD  When porches are not treated, PbD levels rise post-work but later decline  When porches are replaced, PbD levels decline post-work and continue to decline through 1-year  Soil lead was not an influential factor in this study, but was in prior studies

14 Recommendations  Clearance testing on porches should be required post-work  Further studies are needed to identify a risk standard  In the interim, a clearance level of 40 µg/ft2 is feasible  Any standard must specify the location to sample  Porch dust lead is strongly related to the paint and conditions on the porch  Exterior point sources can affect porch dust lead levels but they are not as influential as paint on the porch; property owners can take action that will protect children in residence

15 Acknowledgements  Conrad Floss ~ City of Rochester  Steven Turner & Chanel Hernandez ~ ABC  Gene Pinzer ~ HUD

16 National Center for Healthy Housing Facebook.com/HealthyHousing Jonathan Wilson, MPP Deputy Director Dave Jacobs, PhD, CIH Director of Research


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