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Waste management

Back when waste management wasn’t a primary concern, residues from industrial processes were either dumped into rivers or buried in the ground. This didn’t change much until the 1950s when a paradigm shift swept through the industry. Since then, industrial waste from Klybeck has been documented and disposed of in an environmentally sound and safe manner. This also benefits the new owners of the site.

Text by Patrick Tschan and Goran Mijuk, photos by Adriano A. Biondo

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Published on 06/09/2021

Alexander Clavel was expelled from Basel because his dye factory stank to high heaven. As a result, he was forced to relocate to Klybeck in 1864, which was then located well outside the city limits.

Only a short time later, the city walls were torn down, and Basel began to grow rapidly. In 1900, almost 35 years after Clavel’s expulsion, the city’s population had increased from 40 000 to 100 000. At the same time, the city’s boundaries had expanded further north to encompass Klybeck.

At the turn of the 20th century, Ciba, whose roots reached back to Clavel, operated a large chemical manufacturing site in Klybeck, where residents relentlessly complained about the nasty smell pestering the entire neighborhood.

Until the 1950s, the inhabitants of Klybeck had to cover their noses to ward off the pungent smells rising from the chemical factories. Back then, when companies weren’t subjected to strict waste management regulations, harmful waste and toxins were simply discharged into the environment – inconceivable from today’s perspective.

The tall chimneys, which were built to drive the pollutant gases further away, dominated the city’s skyline for many decades.

“You have to realize that, for decades, hazardous waste from  the chemical industry was simply dumped into the Rhine,” says Paul Svoboda, Head of the Water and Soil Department of the canton of Basel-Stadt. “This was the simplest and cheapest solution. The city even set up three ramps – located on Rheinweg, Dreirosenstrasse and Elsaesserstrasse – so that industrial waste could be poured down into the river. At the beginning of the 20th century, a ferry was put into operation to discharge the waste straight into the middle of the Rhine, and thus disperse it more evenly,” Svoboda adds.

This crude way of garbage disposal, which was then actually approved by the government, damaged the ecosystem and threatened the livelihoods of local fishermen, whose yields decreased substantially.

At some point, the city constructed large pipes extending into the Rhine, which enabled factories to release industrial effluents directly into the river. This, in turn, exacerbated the pollution problem and ren-dered fishing unviable. The chemical industry reimbursed the fishermen for their losses by purchasing “fishing leases,” the last payment being made in 1951 – to a former fisherman named Buerglin.

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“In the 1950s, a new water protection ordinance was enacted that prevented waste from being simply dumped into the Rhine. As a result, industry turned increasingly to landfills, which – as we are aware today – caused other problems. However, contrary to what many people think, waste was never stored on factory premises. There were no waste dumps in Klybeck,” explains Paul Svoboda.

Despite measures taken on the site, Klybeck wasn’t spared from contamination. “It’s clear,” says Svoboda, “that over a hundred years of chemical production has left its mark. We know a lot about the area, but not everything. Maybe there were accidents in the 1920s or 1930s that aren’t documented anywhere.”

Hence, there is still potential for unforeseen issues to arise during the planned transformation of the site: “The terrain of Klybeck is fraught with unknown hazards. Even the many boreholes that had been drilled to trace contamination are merely snapshots. Samples taken from a borehole may be fine. This, however, doesn’t preclude the presence of dangerous substances a couple of meters deeper down,” Svoboda elaborates.

Precise documentation

The detailed documentation of all waste handling and disposal activities conducted in Klybeck since the 1960s provide an indispensable basis for all future activities.

All contaminations on the Klybeck site are well understood, except for two areas, where accidents are known to have occurred. Novartis and BASF share the responsibility for their cleanup. As a result, they are required to carry out all remediation work and bear the costs. In the case of Novartis, efforts to remove the chlorobenzene contamination have been in progress since 1990.

If other contaminations are discovered on the site, all remedial actions will be undertaken by Swiss Life and Rhystadt – two firms that bought the entire Klybeck site in 2019 to transform the erstwhile industrial hub into a vibrant urban district. These companies have pledged to take all necessary action to ensure that the future residents of Klybeck would not be adversely affected by the district’s industrial past.

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In future, Klybeck will be full of highrise condos and lofty office buildings towering into the sky. In fact, people in Klybeck were already building upwards a century ago, though not to enjoy the view of the Rhine basin, but to get rid of the noxious odor caused by the industrial activity.

One of the high chimneys of Klybeck was once the tallest structure in Switzerland, having a height of 120 meters. It was erected in 1956 to release toxic gases and to minimize their environmental hazard.

The chimney was shut down in the 1990s when a new air pollution control ordinance was enacted, which prohibited the discharge of untreated contaminants into the atmosphere.

At the beginning of the 21st century, when the impending demolition of the chimney became public, Basel’s heritage department intervened and demanded that the tower be included in the list of historic monuments.

However, the cantonal government refused to grant a permit on heritage grounds: “Given that the restoration and maintenance of the structure would incur costs amounting to millions of Swiss francs, and that any further use of the chimney would result in substantial environmental damage, we believe that demolition is in the public interest.”

Thus, this impressive landmark situated at the heart of Klybeck was destroyed in 2003. The new residents are unlikely to be bothered by this, as the chimney would most likely obstruct the beautiful landscape of the Rhine valley. Perhaps it would even remind them of the past, which would prove a noisome matter.

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