Evaluation of the Webler-Brown model for estimating tetrachloroethylene exposure from vinyl-lined asbestos-cement pipes

Table 3 Number of samples according to percentile categories^a of measured and modeled PCE concentrations

	Measured PCE concentration
		≤ 50^th percentile	> 50–75^th percentile	> 75^th percentile	Total
Model estimated PCE concentration	≤ 50^th percentile	28	10	6	44
	> 50–75^th percentile	12	7	3	22
	> 75^th percentile	5	4	13	22
	Total	45	21	22	88

^a 207 μg/L and 657 ug/L were the 50^th and 75^th percentile modeled PCE concentrations, respectively. 0.5 μg/L and 32 ug/L were the 50^th and 75^th percentile measured PCE concentrations, respectively.

ISSN: 1476-069X