Health & Safety Articles

  • Building owners need to be concerned about carbon dioxide regulations

    This article examines EPA's Advance Notice of Proposed Rulemaking for regulating carbon dioxide and the potential impact it may have on commercial property owners. The author suggests the time is ripe for property owners to evaluate the operations of their buildings to identify steps they might take to minimize the effect of any such regulation. In the near future, the author says, it may not be ...


    By Bloomberg BNA

  • Groundwater contaminated with chlorinated solvents - Air force center for environmental excellence

    LOCATION:  Dover, DelawarePROJECT DATE:  October 1999 to presentCLIENT:  Air Force Center for Environmental Excellence (AFCEE) BACKGROUND: Groundwater contaminated with chlorinated solvents is a common problem to many US Air Force Bases. TSI in conjunction with Solutions Industrial & Environmental Services (Solutions-IES) of Raleigh, NC approached AFCEE with an innovative method utilizing ...


    By Terra Systems, Inc. (TSI)

  • Triton boosts municipality treating cheese processing waste

    Pre-treatment with a Triton removed odors from the RBC system and boosted treatment performance Problem This Midwestern USA city upgraded its treatment system over the years. Although it has a population of only 2,700, the town’s cheese processing plant makes their influent equivalent to a city of 50,000. In 1986, a mechanical wastewater treatment plant was constructed to be used in ...

  • Korea : Olympic sized clean up

    AIRE-O2® aerators breathed fresh life into the Suyong River and Pusan Harbor Yacht basin, reversing the damage of years of heavy industrial pollution in its upper reaches. Korean officials chose the AIRE-O2® system to improve water quality for the 1988 Olympic Yacht Races due to the aerator’s capabilty to aerate and mix the brackish waters of this vast project. Within days of AIRE-O2® operation, ...

  • Asian games fresher in Beijing, China

    Beijing, China officials enlisted the aid of Aeration Industries International and its AIRE-O2® aeration system to restore water quality in a major river that winds throughout the city, including the sites holding the 1990 Asian Games events. Domestic sewage and industrial discharges into the river had polluted the river which is common to rapidly growing, developing cities. The AIRE-O2® system ...

  • Gasoline spill from underground storage tanks - Conoco, Inc.

    LOCATION:  Watsonville, CaliforniaPROJECT DATE:  July, 1987 to July, 1988CLIENT:  Conoco, Inc. BACKGROUND: A gasoline spill from underground storage tanks at a service station in Watsonville was discovered. Approximately 1,500 gallons were lost to the shallow aquifer of low permeability. Physical recovery operations were not possible. The California Regional Water Quality Control ...


    By Terra Systems, Inc. (TSI)

  • Minnesota, USA: 20 years of water quality

    Since 1978, this Minnesota marina on the Mississippi River has depended on its AIRE-O2® aeration system year-round. During winters where temperatures plunge to -30 oF below zero, the aerators keep the marina free from ice, eliminating the time and expense of removing dock moorings. Algae and odors are controlled in summer when temperatures can surpass 100 oF. During one severe drought stricken ...

  • Pretreatment system a success for meat processor

    Recovery & removal rates doubled with the AIRE-O2 MICROFLOAT® Problem This Midwest USA red meat processor faced rapidly rising surcharges from the municipal wastewater treatment plant that received the processor’s wastewater. City authorities encouraged the processor to help fund an expansion of the treatment plant’s capacity, an option the processor wanted to avoid. A successful ...

  • Improved winter treatment performance at last

    ' Flow rates are higher due to increased biological efficiency,' said the engineer Problem This eastern USA chemical plant produces polyester resins and wastewater containing terephthalic acid and ethylene glycol. Like many wastewater treatment facilities, this plant has had its share of treatment challenges. 'Our waste is rapidly oxidized and tends toward filamentous growth,' said the ...

  • Expansion yields quality standards in Europe

    ' No aerosols/odors, maintenance savings, turndown capability, and improved treatment' resulted with the AIRE-O2® aerators, reported the engineer Problem This European chemical company’s propylene oxide/tertiary butyl alcohol plant decided to expand its activated sludge system. The existing 1.58 MG (6,000 m 3) concrete basin had reached capacity. Also, three 60 hp (45 kW) surface ...

  • TCE contamination of the groundwater - Altus air force base

    LOCATION:  Altus Air Force Base, OklahomaPROJECT DATE:  November 2001 to presentCLIENT:  Air Force Center for Environmental Excellence (AFCEE) BACKGROUND: TCE contamination of the groundwater was found at the Altus AFB Site SS-17 at a depth of 7 to 20 feet below ground surface. The aquifer at Altus AFB consists unconsolidated fine-grained alluvial deposits, primarily clay, overlying a fractured ...


    By Terra Systems, Inc. (TSI)

  • Gasoline storage tank spill - Exxon

    LOCATION:  Millville, New JerseyPROJECT DATE:  June, 1975 to September, 1976CLIENT:  Exxon BACKGROUND: A gasoline spill from a storage tank was found when gasoline fumes were noticed in basements adjacent to the gasoline station. An undetermined amount of gasoline was lost to the shallow, unconfined sandy aquifer of high porosity and permeability. An extensive clay bed lay beneath ...


    By Terra Systems, Inc. (TSI)

  • Gasoline pipeline break - Sun Oil Company

    LOCATION:  Ambler, PAPROJECT DATE:  July, 1972 to January, 1974CLIENT:  Sun Oil Company BACKGROUND: A pipeline break spilled an estimated 3,186 barrels of high octane gasoline into an aquifer composed of a highly fractured dolomite. The gasoline was contained by pumping nearby wells. Physical recovery of the gasoline continued until no longer productive an estimated 1,000 barrels ...


    By Terra Systems, Inc. (TSI)

  • Gasoline pipeline break - Sun Pipeline Company

    LOCATION: Southeastern, PennsylvaniaPROJECT DATE:  November, 1984 to October, 1991CLIENT:  Sun Pipe Line Company BACKGROUND: A pipeline break resulted in the spill of 100,000 gallons of gasoline to a highly fractured shale aquifer. A number of private drinking water wells were affected. In excess of 10 homeowners were forced to vacate due to gasoline vapors in their homes. Producing ...


    By Terra Systems, Inc. (TSI)

  • Chesapeake Bay, USA: Aquatic life returns

    Forced inside to escape noxious odors from the water one summer, Chesapeake Bay area residents could no longer use their swimming pools or barbeques. Forget any out-door parties. Marine birds and aquatic life had vanished from their canal, a tributary to a creek that flows into the Chesapeake Bay. The neighborhood association chose the AIRE-O2® aeration system as a solution for its water quality ...

  • Groundwater contamination of 1,1,1-TCA, PCE - Manufacturing facility

    LOCATION:  Glen Cove, New YorkPROJECT DATE:  September 2000 to presentCLIENT:  Confidential BACKGROUND: Groundwater in a sand and gravel aquifer beneath this active manufacturing facility was contaminated with 1,1,1-TCA (concentrations up to 480 mg/L), PCE, and their degradation products. The site owner, faced with a long term (in excess of 100 years) and expensive pump and treat ...


    By Terra Systems, Inc. (TSI)

  • Wind erosion of waste impoundments in arid climates and mitigation of dust pollution

    Wind can erode and disperse fine-grained material from an impoundment of mining, industrial or municipal waste that stands above the level of its surroundings. Such dust dispersion can be a serious nuisance as well as a health hazard to inhabitants and animals in nearby settlements. It can also degrade crops, making them less marketable, and pollute soil, surface water and ground water. Wind can ...


    By SAGE Publications

  • Impact of heavy metals on the oil products biodegradation process

    Oil products continue to be used as a principal source of energy. Wide-scale production, transport, global use and disposal of petroleum have made them major contaminants in prevalence and quantity in the environment. In accidental spills, actions are taken to remove or remediate or recover the contaminants immediately, especially if they occur in environmentally sensitive areas, for example, in ...


    By SAGE Publications

  • Immobilization of organic pollutants in cement pastes admixed with organophilic materials

    The results of 2-chloroaniline (2-CA) immobilization experiments in cement matrices, using an organophilic clay modified with phenolic resins as pre-sorbent, are shown. The 2-CA suspended in water was kept in contact with the organoclay for 24 h, and the slurry obtained was then admixed with ordinary Portland cement (OPC) without additional water, to obtain a firm solid waste. Six cement—clay ...


    By SAGE Publications

  • Use of stratified cluster sampling for efficient estimation of solid waste generation at household level

    Relatively few studies have been performed to characterize municipal solid waste (MSW) at household level. This is due in part to the difficulties involved with collecting the data and selecting an appropriate statistical sample size. The previous studies identified in this paper have used statistical tools appropriate for analysing data collected at a material recovery facility or landfill site. ...


    By SAGE Publications

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