Of the 29 positive surface wipe samples
, 17 were collected from surfaces with visible surface defects, while 12 were collected from surfaces without visible defects.
Arsenic found on wipe samples
from the middle of the room was less than half of that found on door wipes, indicating that tracked-in arsenic concentrations become greater the closer one gets to the door adjacent to the CCA-treated deck.
On average, the data collected from the wipe samples
showed that exposure risks are generally relatively low.
Once each month, wipe samples
were shipped on dry ice to the laboratory (Southwest Research Institute, San Antonio, TX), where they were stored at -12[degrees]C.
were soaked and then digested in a laboratory microwave (MDS-2000; CEM Corporation, Matthews, NC).
Blank wipe samples
, spiked wipe samples
with only the IS solution, and 6 calibration standards prepared by a working solution with 20 ADs were adopted to build up a calibration curve at the following concentrations: 1.25, 2.5, 5, 10, 20, 40 ng/wipe.
Lead dust wipe samples
were collected adjacent to the location of the precleaning dust sample.
Additionally, despite hand washing prior to sample collection, three of seven hand wipe samples
tested positive for lead.
Unlike air testing that is used to "clear" completed asbestos abatement projects, wipe samples
are commonly used on lead abatement projects.
A DHEC environmental health team will go out and collect paint, soil and/or wipe samples
"We demonstrated our flexographic printing equipment and actually converted printed and packaged wet wipe samples
on our lab line."
The researchers claimed their study, which used dust and surface wipe samples
from living rooms and children's bedrooms as well as urine and hair samples from the children, was the first to find evidence of lingering smoke contamination in dust.