Pasadena, CA, United States
Pasadena, CA, United States

Tetra Tech is a provider of consulting, engineering, construction and technical services which includes resource management and infrastructure, based out of Pasadena, California, United States. With approximately 13,000 employees in various countries, including individuals with expertise in science, research, engineering, construction, and information technology. The company's annual revenue for the fiscal year ended September 30, 2012 was $2.02 billion. Their Slogan is, "Complex World. Clear Solutions." Wikipedia.


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Patent
Tetra Tech Inc. | Date: 2016-10-12

A system and method for adjusting light emitter output for a railway track inspection system based on data feedback from one or more sensors.


PASADENA, Calif.--(BUSINESS WIRE)--Tetra Tech, Inc. (NASDAQ: TTEK) announced today that the U.S. Agency for International Development (USAID) has awarded the Company a $25 million single-award contract to provide monitoring and evaluation services in Mozambique. Under the five-year contract, Tetra Tech will support USAID by providing training, research and evaluations, performance monitoring, data verification, and environmental compliance in the region. USAID/Mozambique manages one of the largest in-country programs in sub-Saharan Africa; however, infrastructure limitations and a dispersed population create challenges to provide effective oversight and management of the area. Through the Mozambique Monitoring and Evaluation Mechanism and Services program, Tetra Tech will work to close this gap by conducting data quality assessments and by helping to improve the functionality of web-based monitoring and evaluation and reporting systems that use the latest technologies to enable quick, accurate, and cost-effective collection of data. “Tetra Tech has been supporting USAID in Mozambique for many years including developing innovative water utility and infrastructure programs for the country,” said Dan Batrack, Tetra Tech Chairman and CEO. “We are pleased to continue to support USAID’s efforts in sub-Saharan Africa by providing highly-skilled, technical experts and data scientists to advance the agency’s objectives in Mozambique.” Tetra Tech is a leading, global provider of consulting and engineering services. We are differentiated by Leading with Science to provide innovative technical solutions to our clients. We support global commercial and government clients focused on water, environment, infrastructure, resource management, energy, and international development. With 16,000 associates worldwide, Tetra Tech provides clear solutions to complex problems. For more information about Tetra Tech, please visit tetratech.com, follow us on Twitter (@TetraTech), or like us on Facebook. Any statements made in this release that are not based on historical fact are forward-looking statements. Any forward-looking statements made in this release represent management’s best judgment as to what may occur in the future. However, Tetra Tech’s actual outcome and results are not guaranteed and are subject to certain risks, uncertainties and assumptions ("Future Factors"), and may differ materially from what is expressed. For a description of Future Factors that could cause actual results to differ materially from such forward-looking statements, see the discussion under the section "Risk Factors" included in the Company’s Form 10-K and 10-Q filings with the Securities and Exchange Commission.


Scialli A.R.,Tetra Tech Inc.
Seminars in Fetal and Neonatal Medicine | Year: 2014

The National Birth Defects Prevention Study is a population-based case-control study. The study has actively sought to identify children with any of 34 specified types of malformation. The mothers of affected and unaffected children have been interviewed with regard to demographic information, lifestyle factors, and exposures. A large number of published studies have appeared and continue to appear on diverse exposures and outcomes. An example of such a study identified an increased odds ratio for ondansetron use among the mothers of children with cleft palate. Possible explanations for associations between exposures and outcomes are chance, error, and causation. The ondansetron-cleft palate association may have arisen by chance given the large number of comparisons made in the study. Error appears unlikely as an explanation of the association. The assessment of causation in teratology uses a systematic evaluation based on the Hill criteria or similar criteria of Shepard or Brent. © 2013 Elsevier Ltd.


Gibb H.,Tetra Tech Inc. | O'Leary K.G.,Tetra Tech Inc.
Environmental Health Perspectives | Year: 2014

Background: Mercury (Hg) is used in gold mining to extract gold from ore by forming "amalgam"-a mixture composed of approximately equal parts mercury and gold. Approximately 15 million people, including approximately 3 million women and children, participate in artisanal small-scale gold mining (ASGM) in developing countries. Thirty-seven percent of global air emissions of Hg are produced by ASGM. The recently adopted Minamata Convention calls for nations to gather health data, train health-care workers, and raise awareness in regard to ASGM activity. Objective: The purpose of our review was to evaluate the current literature regarding the health effects of Hg among those working and/or living in or near ASGM communities. Methods: We searched PubMed, ScienceDirect, and Google Scholar for studies relating to health effects and biomarkers of Hg exposure in ASGM communities. Articles published from 1990 through December 2012 were evaluated for relevance. Discussion: Studies reporting health assessments, kidney dysfunction, neurological disorders and symptoms, and immunotoxicity/autoimmune dysfunction in individuals living in or near an ASGM community were identified. More than 60 studies that measured biomarkers of Hg exposure in individuals living in or near ASGM communities were also identified. These studies, conducted in 19 different countries in South America, Asia, and Africa, demonstrated that hair and urine concentrations are well above World Health Organization health guidance values in ASGM communities. Conclusions: ASGM workers and their families are exposed to Hg vapor, and workers, workers' families, and residents of nearby and downstream communities are consuming fish heavily contaminated with methylmercury.


Patent
Tetra Tech Inc. | Date: 2013-01-16

An anthropogenic sorbent material modified for sequestering and/or attenuating multiple chemical and/or biological pollutant species, both organic and inorganic, in an aqueous environment is disclosed as well as a method of sequestering and/or attenuating multiple chemical and/or biological pollutant species, both organic and inorganic, in an aquatic ecosystem by capping at least a portion of a sedimentary basin of the aquatic ecosystem.


A decontaminant and method for decontaminating an infrastructural system is disclosed, the decontaminant including from about 3% to about 5%, by weight, of a permanganate compound; from about 8% to about 12%, by weight, of a strong mineral acid; and from about 80% to about 90%, by weight, of a solvent.


Patent
Tetra Tech Inc. | Date: 2015-05-29

A system and method for adjusting light emitter output for a railway track inspection system based on data feedback from one or more sensors.


Patent
Tetra Tech Inc. | Date: 2015-05-29

A system and method for inspecting a railway track bed using a plurality of sensors that are synchronized for rapid interrogation of a railway track bed while the sensors are in motion at a high rate of speed.


Patent
Tetra Tech Inc. | Date: 2015-05-29

A protective shroud is provided for enveloping light radiating from a light emitter used with a sensor system for mapping of a railway track. The protective shroud includes: a rigid body having a frame and at least one opaque panel connected to the frame, the rigid body defining at least a first portion of a light radiation zone; a skirt formed of high density fibers extending from adjacent a bottom edge of the at least one opaque panel to adjacent a ground surface; at least one light emitter connected to the rigid body adjacent a top edge of the rigid body to emit light radiation into the light radiation zone; and at least one sensor connected to the rigid body adjacent the top edge of the rigid body to sense the light emitted from the at least one light emitter.


Patent
Tetra Tech Inc. | Date: 2015-05-29

A 3D track assessment system is disclosed for identifying and assessing features of a railway track bed based on 3D elevation and intensity data gathered from the railway track bed.

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