Fig. 3. Bivariate plots of corrected deethylatrazine relative to (A) corrected atrazine, (B) age of ground water, and (C) depth of screened interval (atrazine and deethylatrazine corrected for recovery). The laboratory reporting level divided by 10 (3.2 x 10^–3 nmol L^–1) was substituted for a nondetected value so the data point would plot on the log-log plot (A); this value indicates no atrazine was present in the sample while deethylatrazine was present.