Pesticide aggregate exposure and cumulative risk 22 A cumulative risk assessment incorporates aggregate exposure data(from multiple pathways),for example: food drinking water residential/non-occupational exposure for those chemicals with a common mechanism of toxicity (such as the OP insecticides). OSU 0regonstae Pesticide aggregate exposure and cumulative risk • A cumulative risk assessment incorporates aggregate exposure data (from multiple pathways), for example: – food – drinking water – residential/non-occupational exposure • for those chemicals with a common mechanism of toxicity (such as the OP insecticides)