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Dames & Moore, 1999 - USDA Forest Service

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Noncarcinogens:<br />

Inhalation of Air<br />

where:<br />

Screening Criteria (ug/l) = RfDxABWlxUCFlxUCF2xHQ<br />

BCF x FCR x FDF<br />

RISK = Acceptable cancer risk level (unitless)<br />

ABWl = Average body weight over period of exposure (kg)<br />

LIFE = Lifetime (years)<br />

UCFl = Unit conversion factor (1,000 pg/rng)<br />

UCF2 = Unit conversion factor (1,000 pg~l)<br />

Rfl> = Reference dose (mglkg-day)<br />

BCF = Fish bioconcentration factor (unitless)<br />

FCR = Fish consumption rate @/day)<br />

FDF = Fish diet hction (unitless)<br />

DURl = Duration of exposure (years)<br />

CPF = Cancer potency factor (kg-daylrng)<br />

Screening criteria based on inhalation of air in a residential setting are developed assuming a child's<br />

exposure. Equations for this pathway are as follows:<br />

Carcinogens:<br />

Noncarcinogens:<br />

where:<br />

Screening Criteria (ug/ rn') =<br />

RISK x ABW2 x LIFE x UCF<br />

CPF x BR x AB2 x DUR2<br />

RfD x ABW2 x UCF x HQ<br />

Screening Criteria (ug/ rn') =<br />

BR x AB2<br />

RISK = Acceptable cancer risk level (unitless)<br />

ABW2 = Average body weight over period of exposure (kg)<br />

LIFE = Lifetime (years)<br />

UCF = Unit conversion factor (1,000 pg/mg)<br />

CPF = Cancer potency factor (kg-daylrng)<br />

RfD = Reference dose (rngkg-day)<br />

G:\~WOJ\rcpom\bold~11-Z\n~74.doc 7-29<br />

17693-00J419Uuly 27. <strong>1999</strong>;5:16 PMORNT FINAL RI REPORT

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