Improving the Confidence Level in Lead Clearance Examination Results through Modifications to Dust Sampling Protocols

    Volume 8, Issue 8 (September 2011)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 2 August 2011

    Page Count: 12


    Cox, David C.
    QuanTech, Inc,

    Dewalt, F. Gary
    QuanTech, Inc,

    White, Kenneth T.
    QuanTech, Inc,

    Schmehl, Richard
    QuanTech, Inc,

    Friedman, Warren
    U.S. Dept. of Housing and Urban Development Office of Healthy Homes and Lead Hazard Control, HUD Office of Healthy Homes and Lead Hazard Control,

    Pinzer, Eugene A.
    U.S. Dept. of Housing and Urban Development Office of Healthy Homes and Lead Hazard Control, HUD Office of Healthy Homes and Lead Hazard Control,

    (Received 14 October 2010; accepted 16 June 2011)

    Abstract

    Multiple pre-cleaned, four-room residential containments were each subjected to a single high-dust generating activity involving lead-based paint. After dust generation, a geometric wipe sampling grid was used, with a target of 8 interior and 8 perimeter samples in each room, to assess dust-lead on the floors. The containment was then cleaned using the “High Efficiency Particulate Air (HEPA) vacuum/3-bucket wet-mop/HEPA vacuum” procedure found in the U.S. Dept. of Housing and Urban Development Guidelines. Post-cleaning (clearance) floor wipe samples were then taken at side-by-side locations to the pre-cleaning samples. It was found that: [1] floor dust-lead along the perimeters of rooms was three times more difficult to clean than dust-lead from the interiors of the rooms; [2] post-cleaning dust-lead loadings tended to be higher along the perimeters of the rooms than in the interiors of the rooms such that clearance failure was much more likely for individual floor samples collected along the perimeters; and [3] four-wipe composite sampling within each room (two randomly selected from the perimeter and two randomly selected from the interior) provided a very reliable method for detecting clearance failure (99% or greater) versus a randomly selected single wipe sample per room (50% or less).


    Paper ID: JAI103469

    DOI: 10.1520/JAI103469

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    Author
    Title Improving the Confidence Level in Lead Clearance Examination Results through Modifications to Dust Sampling Protocols
    Symposium Symposium on Surface and Dermal Sampling, 2010-10-15
    Committee D22