Wipe, dust

Dust Wiping of hard surface of known dimension acid digestion ICP/AES AAS GFAAS Varies No data ASTM 1998f (ASTM E 1728) ASTM 1998b (ASTM E 1644) ASTM 1998a (ASTM E 1613)... 

ASTM. 1998b. ASTM E 1644. Standard practice for hot plate digestion of dust wipe samples for the determination of lead by atomic spectrometry. American Society for Testing and Materials. 

Dinitrotoluene Unmodified SPCE 161ngml 1 137 ngmU1 Potable water (102.4), dust wipes (73.4) and saliva (47.5) 161ngml 1 Linear sweep voltammetry Honeychurch et al. [193]... 

A homeowner or tenant can also do dust wipe sampling to assess the safety of his or her home. This gives a good indication of how much lead dust is collecting around the home from friction and abrasion or deteriorating paint. 

If a dust wipe from a floor shows a concentration of over 100 xg per square foot, it is considered to indicate a lead hazard. For wipes taken on windowsills, the level suggesting concern is 500 p.g per square foot, and for a window trough, 800 p.g per square foot. 

Provides a state-by-state list of laboratories approved by EPA s National Lead Laboratory Accreditation Program (NLLAP) and recommended for analyzing paint chips, dust wipes, and/or soil. Also information on specific XRF instruments. 

As set forth in U.S. HUD (1995), dust sampling by use of surface wipes is preferred on the basis of ease of use, relative cost, and a generally favorable performance record for routine samplings. For example, children s blood lead levels and dust wipe lead content in the same units are well correlated (Farfel et al., 1994 Lanphear et al., 1995). Certain vacuum collection approaches can also be used with trained operators in research studies. Measuring dust lead loading from hard surfaces is more reliable than firom complex surfaces such as upholstery or carpeting (Ewers et al., 1994). 

Area air samples were collected before, during, and after the work activity. Personal breathing zone air samples were collected during the work activity. Dust wipe samples were collected before work started and after final clean-up. Dust wipe samples were routinely collected from floors near the work activity and in some cases collected from a windowsill and/or window well. 

Dust (wipe sampling only) Risk assessment Risk assessment screen... 

Some commenters questioned the need for dust sampling technicians. One stated that there is no benefit to creating a third inspection-type discipline that has such limited training requirements. Two commenters thought that only EPA- or state-certified risk assessors should be allowed to collect dust wipe clearance samples and two commenters thought that dust... 

Windowsills were also tested. For the dry cloth protocol, 96.4% of the sills that achieved white glove were also confirmed by dust wipe sampling to be below the dust-lead hazard standard for windowsills, and the one sill that did not achieve white glove was also below the standard. For the wet cloth protocol, all of the sills that achieved white glove were also below the dust-lead hazard standard, as were the four sills that did not reach white glove. ... 

The different types of furniture pohshes include hquid or paste solvent waxes, clear oil pohshes, emulsion oil pohshes, emulsion wax pohshes, and aerosol or spray pohshes (3). Nonwoven wipes impregnated with pohsh ingredients have been targeted at consumers who do not wish to expend the time to dust before polishing (11). Compilations of representative formulas are given in References 3, 4, 12, and 13. Paste waxes contain ca 25 wt % wax, the remainder being solvent. Clear oil pohshes contain 10—15 wt % oil and a small amount of wax, the rest being solvent. Aerosol or spray products may contain 2—5 wt % of a sihcone polymer, 1—3 wt % wax, 0—30 wt % hydrocarbon solvent, and ca 1 wt % emulsifier. The remainder is water. 

Outdoor lead dust was found to be a more potent contaminant of children s hands than indoor lead dust at day care centers in New Orleans boys, in general, had higher hand lead levels than girls. The conclusions were based on lead analysis of hand wipe samples taken before and after children played outdoors at four different day care centers (a private inner-city site, a private outer-city site, a public inner-city site, and a public outer-city site). The private inner-city site had a severely contaminated outdoor play area with measured soil lead concentrations ranging from 287 to 1,878 mg/kg. The outdoor play area at the public inner-city site, where children exhibited the lowest hand lead measurements of any site in the study, had been completely paved over with concrete or rubberized asphalt and had well-maintained equipment (Viverette et al. 1996). 

ASTM. 1998f. ASTME 1728. Standard practice for field collection of settled dust samples using wipe sampling methods for lead determination by atomic spectrometry techniques. American Society for Testing and Materials. 

Clean and remove electrostatic charges from the solution tubes by wiping them with a wet towel and drying them with a clean lint-free cloth (without tubbing). Place the tubes in the wire-screen tray, cover them with a cloth to protect them from dust, and allow them to stand near die balance for at least 30 mins to attain equilibrium with the moisture content of the air... 

Note The counterpoise approximates the weight, volume, and exterior surface area of a solution tube containing 10 steel balls and 50ml of dibutylphthalate. It should be kept standing near the balance, covered with a cloth to protect it from dust. Do not wipe tbe counterpoise wiping will disturb its equilibrium with the prevailing temperature, pressure, and humidity... 

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