scholarly journals Regulations, legislation, and guidelines for artificial surface water and groundwater tracer tests in Canada

2012 ◽  
Vol 47 (1) ◽  
pp. 42-55 ◽  
Author(s):  
Christian Wolkersdorfer ◽  
Jenna LeBlanc
Keyword(s):  
Newfoundland And Labrador ◽  
Tracer Tests ◽  
Tracer Test ◽  
Sodium Fluorescein ◽  
Environment Canada ◽  
Canadian Province ◽  
Quality Guidelines ◽  
Artificial Surface ◽  
Rhodamine Wt ◽  
Fisheries Act

This paper describes Canadian federal and provincial regulations, legislation, and guidelines for artificial tracer tests, where substances are released into water, and provides a world-wide comparison. Alberta is currently the only Canadian province with guidelines and regulations relating to those tests. None of the other provinces have specific tracer test regulations in place, though the injection of artificial substances into waters is covered by Section 36(3) of the federal Fisheries Act. Newfoundland and Labrador, the Northwest Territories, and Nunavut sometimes require a permit to conduct a tracer test, and Quebec is planning to implement guidelines and regulations based on Michigan/USA Environmental Quality guidelines. In each case Fisheries and Oceans Canada (DFO), Environment Canada, and the Provincial environment departments should be contacted and the proposed test described as detailed as necessary. We present potential tracers, such as uranine (sodium fluorescein), or Rhodamine WT, that can be used in artificial tracer tests. This study is the result of contacting personnel from organizations such as Environment Canada, Fisheries and Oceans Canada, provincial departments of environment, researchers, and consultants.

Tracer test and hydraulics modeling of a large WWTP

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
C. Fall ◽  
N. Flores-Alamo ◽  
M. Esparza-Soto ◽  
C. M. Hooijmans
Keyword(s):  
Activated Sludge ◽  
Treatment Plant ◽  
Tracer Tests ◽  
Tracer Test ◽  
Stirred Tank ◽  
Mixing Models ◽  
Concentration Profiles ◽  
Stirred Tank Reactors ◽  
Rhodamine Wt ◽  
Sampling Schedule

Tracer tests with rhodamine WT were performed at the biggest wastewater treatment plant of Mexico (‘Dulces Nombres’ WWTP, 5 m3/s). The aim was to develop the hydraulics sub-model to represent the aeration tanks, in the context of a project for calibrating the activated sludge model N°1 (ASM1). The planning of the experiment was performed by pre-simulation in AQUASIM, which allowed determining the quantities of dye (8 L per reactor) and sampling schedule that were required. After the tests, the rhodamine concentration profiles of the outlet mixed liquors were fit with different alternative of tank mixing models. Simulating the tracer data allowed to estimate the unknown influent flows, as well as determine the best hydraulics model: 4 completely stirred tank reactors retro-connected through the RAS (return activated sludge).

Mixing and Detention Time Distribution in Activated Sludge Tanks

1985 ◽  
Vol 17 (2-3) ◽  
pp. 197-208 ◽  
Author(s):  
H. Bode ◽  
C. F. Seyfried
Keyword(s):  
Activated Sludge ◽  
Time Distribution ◽  
Strong Influence ◽  
Tracer Tests ◽  
Tracer Test ◽  
Evaluation Procedure ◽  
Response Curves ◽  
Detention Time ◽  
Test Study ◽  
Mixing Characteristics

The interrelationship between mixing characteristics and tracer response curves in activated sludge tanks is explained. In some cases the return sludge cycle has a strong influence on the tracer response curves. Results from tracer tests in the field are hard to interpret because the tracer in the return sludge interferes with the initial tracer. Therefore a special evaluation procedure has to be applied. The paper closes with results from a field tracer test study.

A Dissemination Strategy for the Management of Knowledge in Rural Communities

2008 ◽  
pp. 1934-1950
Author(s):  
Ken Stevens
Keyword(s):  
Rural Communities ◽  
Information And Communication Technologies ◽  
Newfoundland And Labrador ◽  
Urban Migration ◽  
Canadian Province ◽  
Dissemination Strategy ◽  
Knowledge Based ◽  
Knowledge Based Economy ◽  
Open Structures ◽  
Autonomous Schools

Schools in rural communities of the Canadian province of Newfoundland and Labrador have been reorganized in the last decade. Because of rural to urban migration and the consequent challenge to the continued existence of many small schools, new academically and administratively open structures have been established within an Internet-based environment. Accordingly, traditional closed, autonomous schools in this province have increasingly become open sites within Internet-linked teaching and learning environments. What began as a research project linking eight schools in a single Digital Intranet has been extended to include schools across the province managed by a recently established branch of the Department of Education of Newfoundland and Labrador—the Centre for Distance Learning and Innovation. This chapter provides an outline of how information and communication technologies have been used to reshape education in a predominantly rural Canadian province, thereby preparing people for participation in the emerging knowledge-based economy.

Characterizing Stormwater Sediments for Ecotoxic Risk

2000 ◽  
Vol 35 (3) ◽  
pp. 341-364 ◽  
Author(s):  
G. vanLoon ◽  
B.C. Anderson ◽  
W.E. Watt ◽  
J. Marsalek
Keyword(s):  
Stormwater Management ◽  
Sediment Quality ◽  
Environment Canada ◽  
Exposure Risk ◽  
Ecosystem Impacts ◽  
Multidisciplinary Study ◽  
Quality Guidelines ◽  
Ecosystem Effects ◽  
Operation And Maintenance ◽  
Potential Risks

Abstract The characteristics of accumulated sediments were investigated, with a focus on selected trace metals, in three Stormwater management facilities and one natural site, all located in the Regional Municipality of Ottawa-Carleton, in Ontario, Canada. This study was conducted in response to concerns expressed by Environment Canada about possible ecosystem impacts by contaminants accumulated in these commonly utilized, passive treatment systems. Also of interest were the effects of facility configuration and operation and maintenance on particulate deposition patterns and resulting exposure risk. This was the first phase of a multidisciplinary study to quantify the risk of ecosystem effects in these systems, and results indicate that there were some significant potential risks present. In addition, results indicate that a simple comparison with provincial sediment quality guidelines may not be sufficient to alert facility owners and operators to these potential risks.

Polycentropus dinkinsorum (Trichoptera: Polycentropodidae), a newly described caddisfly species from the southern Appalachian Mountains, USA

Zootaxa ◽  
2020 ◽  
Vol 4853 (1) ◽  
pp. 126-132
Author(s):  
ALEXANDER B. ORFINGER ◽  
DAVID A. ETNIER
Keyword(s):  
United States ◽  
Newfoundland And Labrador ◽  
Male Genitalia ◽  
Appalachian Mountains ◽  
The United States ◽  
Species Group ◽  
Canadian Province ◽  
Southern Appalachian Mountains ◽  
Southern Appalachian ◽  
First Time

We describe here a new caddisfly species of the genus Polycentropus (Trichoptera: Polycentropodidae) based on males from numerous localities throughout the southern Appalachian Mountains of the United States. Polycentropus dinkinsorum is a member of the P. confusus Species Group and is readily separated from its congeners based on aspects of the male genitalia. A diagnosis and illustrations of male genitalia are provided. In addition, P. pentus Ross 1941 is reported for the first time from the Canadian province of Newfoundland and Labrador. 

DAKO on Trial

2012 ◽  
Vol 16 (3) ◽  
pp. 275-295
Author(s):  
Kimberly Bonia ◽  
Fern Brunger ◽  
Laura Fullerton ◽  
Chad Griffiths ◽  
Chris Kaposy ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Decision Making ◽  
Newfoundland And Labrador ◽  
Pierre Bourdieu ◽  
Laboratory Medicine ◽  
Test Results ◽  
Bruno Latour ◽  
Canadian Province ◽  
Ethical Argument ◽  
Recent Laboratory

This paper tells the story of a recent laboratory medicine controversy in the Canadian province of Newfoundland and Labrador. During the controversy, a DAKOAutostainer machine was blamed for inaccurate breast cancer test results that led to the suboptimal treatment of many patients. In truth, the machine was not at fault. Using concepts developed by Bruno Latour and Pierre Bourdieu, we document the changing nature of the DAKO machine’s agency before, during, and after the controversy, and we make the ethical argument that treating the machine as a scapegoat was harmful to patients. The mistreatment of patients was directly tied to a misrepresentation of the DAKO machine. The way to avoid both forms of mistreatment would have been to include all humans and nonhumans affected by the controversy in the network of decision-making.

A Four-Step Process to Reposition Small Schools as Sites Within Teaching and Learning Networks

2011 ◽  
pp. 149-159
Author(s):  
Ken Stevens
Keyword(s):  
Rural Communities ◽  
Professional Education ◽  
Newfoundland And Labrador ◽  
Teaching And Learning ◽  
Small Schools ◽  
Learning Networks ◽  
Canadian Province ◽  
Small High Schools ◽  
Small Rural Schools ◽  
Senior Students

The international problem facing small high schools in rural communities of providing access to educational and vocational opportunities that approximate those available to urban students has been addressed by repositioning these institutions as sites within teaching and learning networks in the Canadian province of Newfoundland and Labrador. Four inter-connected dimensions of change are outlined (technological, pedagogical, organizational, and conceptual) whereby small rural schools in this Canadian province were repositioned as sites in teaching and learning networks thereby enhancing educational and vocational opportunities for senior students. There are implications in these changes for the professional education of high school teachers who are increasingly likely to be required to teach in networked classes as well as in traditional classrooms.

A Dissemination Strategy for the Management of Knowledge in Rural Communities

2011 ◽  
pp. 221-239
Author(s):  
Ken Stevens
Keyword(s):  
Rural Communities ◽  
Information And Communication Technologies ◽  
Newfoundland And Labrador ◽  
Urban Migration ◽  
Canadian Province ◽  
Dissemination Strategy ◽  
Knowledge Based ◽  
Knowledge Based Economy ◽  
Open Structures ◽  
Autonomous Schools

Schools in rural communities of the Canadian province of Newfoundland and Labrador have been reorganized in the last decade. Because of rural to urban migration and the consequent challenge to the continued existence of many small schools, new academically and administratively open structures have been established within an Internet-based environment. Accordingly, traditional closed, autonomous schools in this province have increasingly become open sites within Internet-linked teaching and learning environments. What began as a research project linking eight schools in a single Digital Intranet has been extended to include schools across the province managed by a recently established branch of the Department of Education of Newfoundland and Labrador—the Centre for Distance Learning and Innovation. This chapter provides an outline of how information and communication technologies have been used to reshape education in a predominantly rural Canadian province, thereby preparing people for participation in the emerging knowledge-based economy.

THE INFLUENCE OF IODIDE AND IODIZED COMPOUNDS ON THE PBI AND THE 131I TRACER TEST WITH SPECIAL REFERENCE TO VARIOUS BIOLOGIC STATES OF THE THYROID

1960 ◽  
Vol XXXV (III) ◽  
pp. 351-358 ◽  
Author(s):  
Arne Thorén
Keyword(s):  
Seed Oil ◽  
Radioactive Iodine ◽  
Radioiodine Therapy ◽  
Tracer Tests ◽  
Tracer Test ◽  
Intravenous Pyelography ◽  
Poppy Seed ◽  
Compound A ◽  
Maximum Duration ◽  
Time Required

ABSTRACT The influence of iodide and iodized compounds upon radioactive iodine tracer tests and on the PBI was investigated by repeated tests in 75 patients. The substances were contrast media for cholecystography and intravenous pyelography, iodized poppy seed oil (»Lipiodol«), iodochlorhydroxyquinoline (»Entero-Vioform«), iodocasein (»Etibol«), and a colloidal iodine preparation (»Tikajod«). The series comprises patients with thyrotoxicosis and with atoxic nodular goiters, patients treated surgically or by radioiodine for thyrotoxicosis, one patient with juvenile atoxic goiter, one who was hypothyroid following radioiodine therapy and, lastly, patients with no known thyroid disease. An attempt was made to determine the time required for normalization of the tests following administration of the various agents and also to ascertain whether the duration of the influence varied with different biological states of the thyroid.–Although the series as a whole exhibits major variations, it is possible to establish for each compound a maximum duration, after which it fails to influence tracer tests and PBI. The tracer test is frequently influenced for a longer period than is PBI. Patients with thyrotoxicosis and, possibly, those with diffuse juvenile goiter are affected for considerably lesser periods than are euthyroid subjects.

The Design and Execution of an Alkaline/Surfactant/Polymer Pilot Test

2013 ◽  
Vol 16 (04) ◽  
pp. 423-431 ◽  
Author(s):  
A.. Sharma ◽  
A.. Azizi-Yarand ◽  
B.. Clayton ◽  
G.. Baker ◽  
P.. McKinney ◽  
...  
Keyword(s):  
Tracer Tests ◽  
Tracer Test ◽  
Lessons Learned ◽  
Chemical Tracer ◽  
The Us ◽  
Single Well ◽  
Initial Discovery ◽  
Sandstone Formation ◽  
Field Perspective ◽  
Alkaline Surfactant Polymer

Summary A tertiary alkaline/surfactant/polymer (ASP) pilot flood was implemented during 2010 in the Illinois basin of the US, and is continuing currently. With initial discovery of the Bridgeport sandstone formation in the early 1900s and more than 60 years of waterflooding, the pilot was designed to demonstrate that ASP flooding could produce sufficient quantities of incremental oil to sanction a commercial project. Laboratory experiments, including corefloods, were performed to determine the optimal chemical formulation for the pilot and to provide essential parameters for a numerical-simulation model. Polymer-injectivity tests, single well chemical tracer tests (SWCTTs), and an interwell-tracer-test (IWTT) program were all performed to prepare for and support a full interpretation of the pilot results. A field laboratory was run through the duration of the pilot to monitor the quality of the injection and production fluids, which turned out to be critical to the success of the pilot. We present the results and interpretation of the ASP pilot to date, the challenges faced during the project, and the lessons learned from the field perspective.

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