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<p> Although successful in laboratory studies, field applications of in situ remediation of chlorinated solvents in groundwater have met with limited success. This is most often attributed to the inability to deliver the amendment evenly throughout the target zone, especially in low permeability and heterogeneous materials. The goal of this research was to employ a prototype of a novel delivery system to evenly deliver amendment across the depth and breadth of the subsurface in a cost-effective method. The research was conducted at 42 Voyager Court, Toronto, ON where concentrations of vinyl chloride in groundwater were in excess of Ontario Ministry of the Environment guidelines (O.Reg.153/04). The subsurface consisted of sandy and clayey silt fill underlain by sandy silt till.</p> <p> The delivery system comprised 29, 1/4" diameter, delivery points with small perforations along the length, installed in a fence perpendicular to groundwater flow, approximately 0.5 m upgradient of the area of concern. The delivery system used low flow rates (approximately 13 to 23% of total groundwater flow) and discrete delivery holes to deliver a potassium permanganate solution (approximately 40 g/L) amended with sodium bromide (approximately 0.8 g/L) across the depth of the subsurface. Fourteen multi-level monitoring wells, each with five sampling ports were installed to monitor the effectiveness.</p> <p> After six months of delivery, sample results indicated that oxidant demand hindered the ability of potassium permanganate to reach and degrade the vinyl chloride. However, elevated bromide concentrations were detected at all downgradient sampling ports within a 1.5 m distance. Thus, the delivery system was successful at delivering the amendment across the depth and breadth of the target area and achieving even delivery.</p> <p> Problems, typically leaks, were encountered with the delivery system design. Additional engineering would be required to improve the header system prior to commercializing this process. This would be a beneficial endeavor, as results of this work indicate that this passive delivery fence technique meets a real need in the remediation industry, which is the even distribution of amendment to target zones in the saturated subsurface, including zones of low permeability.</p> / Thesis / Master of Applied Science (MASc)

On July 1, 1971, the Twenty-Sixth Amendment to the United States Constitution was ratified which prohibited states from denying citizens who had attained the age of eighteen the right to vote. Having passed 96-0 in the Senate and 401-19 in the House of Representatives, the amendment was widely considered a bipartisan effort with minimal resistance from within the two major political parties. This paper seeks to determine how this largely politically unifying amendment process became so politicized since its passage, including an analysis and comparison of factions who fought against initial passage with those who seek to suppress the youth vote. A historical analysis will look deeper into how those battles were won with the ultimate passage of the amendment. Using a mixed methodology approach including a quantitative analysis of polling data and a qualitative analysis of partisan methods to influence youth voter turnout, the paper shows a trend towards increased politicization that has peaked in today's political landscape. Three specific elections serve as case studies and a lens through which to analyze changes in the law, changes in campaign strategies, changes in rhetoric, and changes in salient issues. Youth engagement is particularly valuable to political leaders and to the nation. In American politics, youth voter turnout has become less of a normative good--in many cases it has been deeply politicized. There is a strong association between specific methods taken by political parties and interest groups and their efforts to mobilize or disincentive youth voter turnout. / Master of Arts / A Constitutional amendment requires two-thirds of the House of Representatives and two-thirds of the Senate to propose it and then must be ratified by three-fourths of the states. This process is difficult to accomplish and one that requires bipartisanship in Congress and must have broad support throughout the nation. Outside of the original Bill of Rights, the first ten amendments, only seventeen amendments have been ratified since the inception of the Constitution. The Twenty-Sixth Amendment is an important milestone in the history of the United States as it ultimately lowered the voting age to 18 throughout the country. The amendment passed 96-0 in the Senate and 401-19 in the House of Representatives and was passed by the necessary number of states in less than four months. It marked the quickest ratification timeline of any amendment in the history of the United States. The amendment was a largely bipartisan effort with minimal resistance from within the two major political parties. This paper seeks to determine how this largely politically unifying amendment process has become so politicized since its passage. The paper shows a trend towards increased politicization that has peaked in today's political landscape. Three specific elections serve as case studies and a lens through which to analyze changes in attitudes about young voters. As a high school teacher who values the importance of youth engagement and voting, I provide some strategies that I believe will help overcome the level of polarization and voter suppression laws that have recently been enacted. Both of the two major political parties have an incentive to engage young voters and encourage them to show up for their side.

Broilers are raised indoors on high density farms with bedding/litter to trap their manure. Ammonia gas, which is produced as the manure decomposes, has adverse effects on human health, bird welfare and the environment. Using litter amendments can reduce the amount and, consequently, the effects of ammonia emitted from broiler houses. The objective of this study was to determine the effectiveness of a biodegradable litter amendment (BLA) in reducing ammonia emitted from a broiler house. A pilot scale test was set up with six adjacent, individually ventilated rooms and a stocking density of 0.07 m² per bird. The birds were fed with a standard commercial, corn and soybean meal based diet and water was provided ad libitum. The first flock was grown on 10 cm of fresh, kiln-dried pine shavings, while subsequent flocks were grown on top-dressed reused litter. The two treatments (control (CTL) and BLA) were randomly assigned to the six rooms after flock 1, to give three replicates per treatment. The exhaust air from the rooms was sampled for ammonia concentration for two days each week starting at four days of age to determine the amount of ammonia emitted. Over three subsequent flocks, the total mass of ammonia emitted from rooms treated with BLA was 31% to 47% lower than the control. Ammonia emitted per bird grown on treated litter and per kg of harvested bird weight was 32% to 44% lower, and the exhaust fans ran 7% to 22% less than CTL over the same period. For both BLA and CTL, the amount of ammonia emitted generally increased with bird age and litter reuse. The study showed that BLA effectively reduced ammonia emitted from a broiler house and that there are potential energy savings from using the amendment. However, ammonia emitted from the BLA rooms during the final flock was 57% higher than CTL, which was attributed to insufficient water (less than 18% moisture by weight) to support the reaction between BLA and ammonia. / Ph. D.

Situated within the larger scholarship on the women's liberation movement of the 1970s exists a body of literature that analyzes the rhetorical functions of pro- and anti- Equal Rights Amendment messages in relation to communication studies. Although limited in scope, this literature acknowledges the tremendous impact of Phyllis Schlafly's STOP ERA campaign in the prevention of the ratification and unratification of states. However, with the exception of a few theses and dissertations, a lion's share of published articles proclaim the STOP ERA and Schlafly herself to be predominantly negative and serve solely as prevailing threats to the women's movement. As a result, heterogeneous scholarship grounded in communication theory proves limited when applied to critical rhetorical analyses of anti-feminist rhetoric. Using Kenneth Burke's frames of acceptance and rejection as a perspective for rhetorical criticism, this thesis demonstrates how Schlafly's conservative ideals functioned rhetorically through acceptance-based frames in the past, and through rejection-based frames after the failed ERA ratification in 1982. In doing so, I provide today's scholars with an important body of knowledge to further examine the ERA debate and its influence on contemporary feminism. Until rhetoric is fully explored within the cultural and historical conditions distinctive to Schlafly's main speeches during the ERA debate, meaningful debate about the women's movement and feminism's current state is subject to remain truncated. / Master of Arts

In 1998, the Virginia Department of Transportation (VDOT) adopted standards for soil handling and amendments to improve created non-tidal wetland soil conditions. This study was conducted in sites where these new reconstruction practices were supposedly being implemented. Specific objectives were (i) to determine the relative effects of soil reconstruction practices on mitigation site soils, (ii) to assess the degree to which hydric soil indicators were present, and (iii) to evaluate the relative edaphic potential of mitigation site soils. Soil physical, chemical and morphological properties were analyzed in ten mitigation wetlands located in Virginia's Piedmont and Coastal Plain. Surface soil pH was high due to liming, although some sites demonstrated low subsoil pH, indicating the presence of sulfidic materials. Nutrient levels varied, while C:N ratios were low (<25:1), suggesting a high quality organic matter complex. Organic amendments were generally applied at a rate of 4% soil organic matter content. Actual measured carbon content was <2.6% (<50 Mg ha⁻¹). Sites not receiving organic materials and associated tillage had root-limiting bulk densities at the surface, while the majority of sites had root-limiting subsoil (30 cm) bulk densities due to weakly developed soil structure and a lack of deep ripping practices. Many sites also contained high sand content (>50%), which may negatively affect other soil properties. Nine sites had confirmed Hydric Soil Indicators, with their occurrence in a site as high as 70%. Soil reconstruction methods need to incorporate higher organic amendment rates and/or routine disking/ripping practices to improve mitigation wetland soil conditions. / Master of Science

Salmonella has been shown to survive in soils for extended periods. Anaerobic soil disinfestation (ASD) represents a promising alternative to fumigation used to manage soilborne diseases and pests; however, little is known about ASD's impact on Salmonella. The study aimed to compare Salmonella die-off following inoculation in ASD and non-ASD processed soil and compare Salmonella die-off in amended and non-amended soils following ASD. Two independent experiments were arranged in randomized complete block designs (four replications per treatment). Sandy-loam soil was inoculated with a Salmonella cocktail (5.5±0.2 log CFU/g) and amended with field-applicable rates of rye (R), rapeseed (RS), hairy vetch (HV), or pelletized poultry litter (PPL). Non-amended, anaerobic (ANC) and non-amended, aerobic controls (AC) were performed in parallel. Soils were irrigated to saturation and covered with plastic mulch. ASD was terminated by removal of plastic (3-weeks). Triplicate soil samples were collected pre-ASD and 0, 1, 2, 3, 7, 10, 14, 21, 28, 31, 35, 38 and 42d post-ASD. Post-ASD soil was irrigated weekly. Salmonella was quantified using standard methods and a modified MPN enrichment protocol. Concentrations between treatments and time-points were analyzed for significance (P≤0.05). Separate log-linear models were used to examine effect of amendment and irrigation on Salmonella die-off during ASD and post-ASD. Salmonella concentrations decreased in all treatments during ASD with the greatest decrease being observed in ASD and non-ASD controls. Among ASD-processed, amended soil, the rye and rapeseed amendments had the greatest decrease in Salmonella concentrations. Salmonella concentrations decreased by ~1 log between pre-ASD and post-soil saturation (95% Confidence Interval (CI) =-1.31, -0.99), and by approximately 2 logs between pre-ASD and termination of ASD (CI=-2.14, -1.83). Salmonella concentrations were ~1 log higher in ASD-processed, pelletized poultry litter-amended soil, compared to the ASD control (CI=0.81, 1.26). The average daily die-off rate of Salmonella post-ASD was -0.05 log per g (CI=-0.05, -0.04). Following irrigation, Salmonella concentrations were 0.14 log greater, compared to no irrigation within 7 d (CI=0.05, 0.23). Salmonella serovar distribution differed by treatment, with >70% survival of Newport in pelletized poultry litter. ASD does not eliminate Salmonella concentrations in soil; instead some amendments may enhance Salmonella survival. / Master of Science in Life Sciences / Anaerobic soil disinfestation (ASD) is the process of removing soilborne weeds, soilborne diseases and insect by creating an anaerobic environment in the soil by incorporating easily decomposable soil amendments, covering with plastic mulch, and irrigating to saturation. The anaerobic soil environment persists for two- to six-weeks. ASD represents a promising alternative to fumigation used to manage soil-borne diseases and pests. However, little is known about ASD's impact on Salmonella, which has been shown to survive in soils for extended periods of time and can contaminate the edible part of produce. This study aimed to determine if ASD is an effective strategy to reduce or eliminate Salmonella from soils that contain typical amendments added to promote soil health, determine the distribution of Salmonella serovars in ASD treated soils, and examine the impact of irrigation. Two independent experiments were conducted in growth chambers. A common soil type in produce growing regions of the Eastern Shore of VA, sandy-loam soil was inoculated with a five-serovar Salmonella cocktail (~5.5±0.2 log CFU/g) and mixed with field-applicable rates of rye, rapeseed, hairy vetch, or pelletized poultry litter. ASD processed soils were irrigated to field saturation, covered with plastic mulch, and left for 3 weeks. Post-ASD, soils were irrigated weekly. Salmonella was quantified at least once per week for up to 6 weeks in soil samples collected in triplicate pre-ASD, post-field saturation, and post-ASD. The three-week anaerobic soil environment, created during ASD, allowed for greater Salmonella survival, compared to the aerobic soil environment. Salmonella survival in ASD processed soil was dependent on amendment. Salmonella concentrations decreased in all treatments during ASD with the greatest decrease being observed in ASD and non-ASD controls. Among ASD-processed, amended soil, the rye and rapeseed amendments had the greatest decrease in Salmonella concentrations. Pelletized poultry litter amended soil, in combination with ASD, had the highest Salmonella concentration, while rye had the lowest at each time-point post-ASD. Salmonella serovar distribution differed by treatment with greater survival of S. Poona in rye, S. Braenderup in hairy vetch and S. Newport in pelletized poultry litter. , Salmonella concentrations were 0.14 log greater, compared to no irrigation within 7 d. Overall, ASD did not eliminate Salmonella in soils. Compared to non-ASD processed soil, ASD processed soil had greater survival of Salmonella and the soil amendment used influenced the survival ability. While more research is needed on ASD and different soil amendments, the findings of this research would suggest pelletized poultry litter not be used as an amendment (i.e., carbon source in ASD) for fields used to grow produce eaten raw, especially when soils are potentially contaminated with Salmonella.

School officials are constantly challenged to perform a myriad of duties in an extremely complex and demanding job with numerous responsibilities. They are expected to work with a variety of students, faculty and parents under difficult circumstances. "Faced with multiple needs, with the necessity of making fast decisions in an atmosphere of fragmented time, administrators are liable for everything they do." School administrators need to understand the rights guaranteed to students by the Fourth Amendment and how it applies to the school setting. This document will provide an overview of student search and seizure in kindergarten to 12th grade (K-12) public schools in a non-traditional dissertation (non-experimental design) format by providing an historical review of the relevant case law. Specifically, based upon legal research, it will review relevant Supreme Court cases, post-New Jersey v. T.L.O. federal, Pennsylvania and other state court cases related to search and seizure in K-12 public schools. The conclusion and summary will provide answers to the guiding questions, provide a conceptual model, outline what is a reasonable search, and provide a short practical school law exercise to test the reader's understanding of search and seizure in public schools. / Ed. D.

The study examines the acceptable computer system use policies of each of the public school districts in the Commonwealth of Virginia, as well as the Virginia School Boards Association and the National School Boards Association policies as they relate to cyberbullying. Public middle school and public secondary school administrators across the Commonwealth were surveyed to determine to what extent cyberbullying is an issue in their schools, and to determine their views of their districts' current policies and procedures as they relate to cyberbullying. The study addresses the legal framework, based upon case law and statutory law that school districts must work within to balance students' free speech rights without abandoning the need to provide a safe and controlled learning environment. The study examines five arenas of students' First Amendment rights as they relate to cyberbullying with particular attention paid to Internet Service Provider liability, including: 1) form of the speech, political or obscene, 2) school-sponsored speech, 3) severity of the disruption caused by the incident, 4) site(s) of the incident, and 5) if the incident rises to the level of a true threat. The study evaluates existing school district policies in addition to public school administrators' perceptions relative to related statutory and case law in order to formulate a model policy that is legally defensible and would be appropriate for adoption by Virginia public school districts. / Ed. D.