A statement was misinterpreted in the article "Treating of deicing storm water runoff at Albany International Airport" that I wrote for CLEARWATERS (vol. 29, no. 3, p. 26). In the "performance" section, a sentence regarding the tolyltriazole levels contained in the runoff states, "The level of these compounds was about 10 mg/L in the storm water runoff in the lagoons at Albany." The lagoons contain concentrated glycol runoff collected by vacuum trucks at the gates and other concentrated streams of runoff. These streams are stored in the lagoons for treatment as part of the airport's overall management plan to prevent these compounds from entering the discharge stream. The airport's discharge into the receiving stream is measured and reported to NYSDEC. In-steam propylene glycol (PG) concentrations are limited to 1 mg/L. At this level of PG, even if untreated runoff entered the stream, the concentration of tolyltriazoles, which are present in the untreated deicing fluid formulations at less than 1%, would be less than 1 ppb which is below the level of detection.

I inadvertently forgot to thank Tim Murphy of the Albany County Sewer Authority for his insight and assistance in bringing this project to fruition.
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Roger Owens, EFX Systems, Inc., Westbury, NY.

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