Daniel D. Snow

TL;DR: WWTP effluent was found to be a significant source of pharmaceutical loading to the receiving waters and Methamphetamine, an illicit pharmaceutical, was detected at all but one of the sampling locations, representing only the second report of methamphetamine detected in WW TP effluent and in streams impacted by WWTP effluents.

TL;DR: Analysis of the nitrate and ammonium in these samples by isotopic ratio mass spectrometry indicated delta(15)N characteristic of an animal or human waste source, underscore the role of CAFO as an important source of antibiotic contamination of groundwater.

TL;DR: The co-occurrence of veterinary pharmaceutical and steroid hormone contamination in groundwater at these locations and the correlation between pharmaceutical occurrence in lagoon wastewater and hydraulically downgradient groundwater indicates that groundwater underlying some livestock wastewater impoundments is susceptible to contamination by veterinary pharmaceuticals and steroid hormones originating in wastewater lagoons.

TL;DR: A method using liquid chromatography-tandem mass spectrometry has been developed for determination of trace levels of tetracycline antibiotics in ground water and confined animal feeding operation waste water and variation in recovery from laboratory fortified blanks ranged from 86 to 110% during routine analysis.

TL;DR: Only trace amounts (< or = 1.0 microg/kg) of oxytetracycline were observed in the subsurface soil, and none was detected in water samples from field lysimeters, suggesting that oxytTrinitycline has low mobility in soil.