Elizabeth A. Albright

Quantity of flowback and produced waters from unconventional oil and gas exploration

The management and disposal of flowback and produced waters (FP water) is one of the greatest challenges associated with unconventional oil and gas development. The development and production of unconventional natural gas and oil is projected to increase in the coming years, and a better understanding of the volume and quality of FP water is crucial for the safe management of the associated wastewater. We analyzed production data using multiple statistical methods to estimate the total FP water generated per well from six of the major unconventional oil and gas formations in the United States. The estimated median volume ranges from 1.7 to 14.3millionL (0.5 to 3.8milliongal) of FP per well over the first 5-10years of production. Using temporal volume production and water quality data, we show a rapid increase of the salinity associated with a decrease of FP production rates during the first months of unconventional oil and gas production. Based on mass-balance calculations, we estimate that only 4-8% of FP water is composed of returned hydraulic fracturing fluids, while the remaining 92-96% of FP water is derived from naturally occurring formation brines that is extracted together with oil and gas. The salinity and chemical composition of the formation brines are therefore the main limiting factors for beneficial reuse of unconventional oil and gas wastewater.

Parental dietary seleno-L-methionine exposure and resultant offspring developmental toxicity.

Selenium (Se) leaches into water from agricultural soils and from storage sites for coal fly ash. Se toxicity causes population and community level effects in fishes and birds. We used the laboratory aquarium model fish, Japanese medaka (Oryzias latipes), an asynchronous breeder, to determine aspects of uptake in adults and resultant developmental toxicity in their offspring. The superior imaging properties of the model enabled detailed descriptions of phenotypic alterations not commonly reported in the existing Se literature. Adult males and females in treatment groups were exposed, separately and together, to a dry diet spiked with 0, 12.5, 25, or 50 μg/g (dry weight) seleno-L-methionine (SeMet) for 6 days, and their embryo progeny collected for 5 days, maintained under controlled conditions and observed daily for hatchability, mortality and/or developmental toxicity. Sites of alteration included: craniofacial, pericardium and abdomen (Pc/Ab), notochord, gall bladder, spleen, blood, and swim bladder. Next, adult tissue Se concentrations (liver, skeletal muscle, ovary and testis) were determined and compared in treatment groups of bred and unbred individuals. No significant difference was found across treatment groups at the various SeMet concentrations; and, subsequent analysis compared exposed vs. control in each of the treatment groups at 10 dpf. Increased embryo mortality was observed in all treatment groups, compared to controls, and embryos had a decreased hatching rate when both parents were exposed. Exposure resulted in significantly more total altered phenotypes than controls. When altered phenotypes following exposure of both parents were higher than maternal only exposure, a male role was suggested. The comparisons between treatment groups revealed that particular types of phenotypic change may be driven by the sex of the exposed parent. Additionally, breeding reduced Se concentrations in some adult tissues, specifically the liver of exposed females and skeletal muscle of exposed males. Detailed phenotypic analysis of progeny from SeMet exposed parents should inform investigations of later life stages in an effort to determine consequences of early life exposure.

A study of anthropogenic and climatic disturbance of the New River Estuary using a Bayesian belief network

The present paper utilizes a Bayesian Belief Network (BBN) approach to intuitively present and quantify our current understanding of the complex physical, chemical, and biological processes that lead to eutrophication in an estuarine ecosystem (New River Estuary, North Carolina, USA). The model is further used to explore the effects of plausible future climatic and nutrient pollution management scenarios on water quality indicators. The BBN, through visualizing the structure of the network, facilitates knowledge communication with managers/stakeholders who might not be experts in the underlying scientific disciplines. Moreover, the developed structure of the BBN is transferable to other comparable estuaries. The BBN nodes are discretized exploring a new approach called moment matching method. The conditional probability tables of the variables are driven by a large dataset (four years). Our results show interaction among various predictors and their impact on water quality indicators. The synergistic effects caution future management actions.

Evaluating Informational Inputs in Rulemaking Processes: A Cross-Case Analysis

As legislative venues are increasingly stymied by gridlock, much policymaking responsibility has devolved to the U.S. states. This article analyzes informational inputs and participation by actors within the rulemaking context, focusing on the level of state rulemaking. Specifically, we explore the rulemaking process in Colorado and North Carolina in two environmental sectors. Using data from documents and in-depth interviews, this study finds that goals of deliberative and open regulatory processes are not met in the cases studied here, in part due to informal pre-hearing processes established by agencies which can be navigated most successfully by the regulated community.

Environmental rulemaking across states: Process, procedural access, and regulatory influence:

Rulemaking is central to policymaking in the United States. Additionally, regulatory authority is devolved to the states in many instances. However, our knowledge of state-level rulemaking is not as advanced as that related to federal rulemaking. To advance the scholarship on state rulemaking, this study compares environmental rulemaking across three environmental issues (renewable portfolio standards, concentrated animal feeding operation regulations, and hydraulic fracturing disclosure rules) in five states (California, Colorado, Michigan, North Carolina, and Pennsylvania) to understand procedural and stakeholder participation commonalities among the cases. Using data from public rulemaking documents, stakeholder comment during rulemaking, and in-depth interviews with agency staff and stakeholders, the findings suggest that there are common patterns of pre-process informal stakeholder consultation, public comment and outreach mechanisms, and corollary issues related to stakeholder access across these cases. These findings advance our knowledge of state-level rulemaking as it relates to public input and procedural equity for stakeholders.