Class Exercise # 7 - SolutionEstimating RBSL in Groundwater for Toluene

Exposure Route: Ingestion of Drinking Water

Exposure Scenario: EPA Reasonable Maximum

Receptor: Adult Residential

HQ x RfD(mg/kg-d) x BW(kg) x AT(yr x d/yr)

RBSL(mg/l) =

IR(l/d) x EF(d/yr) x ED(yr)

1 x 0.2 mg/kg-d x 70 kg x 30 yr x 365 d/yr

=

2 l/d x 350 d/yr x 30 yr

= 7.3 mg/l (ppm)

= 7300 mg/l (ppb)

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Notes: