Recently, city staff discovered cracks in the newly constructed
concrete bowls, allowing groundwater to seep in. The puddles of water
were then tested and found to contain Chromium 6, the carcinogen made
famous by the movie, Erin Brockovich.Two years ago, the city encountered
this same toxic groundwater when first attempting to construct the skate
bowls. This earlier accident, and the costly cleanup that followed,
revealed that most of the immediate area has been impacted by an underground
chromium 6 plume from a metal engraver located several blocks upgradient.
Frankly, the city has only itself to blame. The staff
failed to conduct a comprehensive environmental review when the city
purchased the property and chose to forego a site evaluation when first
planning for the deep bowl design of the skate facility. Only because
the City of Berkeley is both the banker and the developer could these
blunders go unchecked. No bank would have financed the purchase of an
industrial site without a Phase I study. This site review would have
uncovered the Chromium 6 groundwater problem and saved much staff time
and taxpayer's money in management, cleanup and redesign.
A year ago, vowing not to repeat its prior mistakes, the
Parks Department finally undertook an environmental evaluation as part
of the redesign process for the skate bowls. The city even contracted
with a special environmental design firm to engineer "containment"
of the chromium 6 and to ensure that there would be "zero seepage".
Yet, even with all this, it was obvious that the redesigned skate park
facility was headed for unavoidable problems.
The park's skate bowls are much like a swimming pool structure.
Many of us have seen basements, underground parking facilities or concrete
ponds, and have noticed how groundwater destabilizes foundations, often
cracking the structure. This concern over hydrology has been consistently
underestimated at the Harrison site.
The skate park property adjoins lower Codornices Creek,
and like much of northwest Berkeley, the groundwater level is quite
shallow. The city's project staff was warned during the public review
of the project that a subsurface design would make structural cracking
a strong possibility given the site's hydrology. There is no question
that this subsurface structure should have not been permitted at this
location, especially for the construction of a children's recreational
The redesign has also failed to isolate the toxic groundwater
plume. Even with the appearance of cracks in the skate bowls, chromium
6 should not have been found in the seeping water. The redesign was
supposed to create a toxic treatment barrier that would control and
neutralize this dangerous chemical. Given the concentrations now being
reported, it is apparent that the city's efforts have done little to
dilute or contain this toxic plume.
Unfortunately, the long-term management of the toxic groundwater
has now become quite problematic when it could have been completely
avoided. Instead of evaluating the property for what it would bear,
the city chose to "reverse engineer" the project and went
looking for ways to accommodate the skate bowl construction in place
of scrutinizing the troubled site. City staff proposed a high tech solution,
both to rationalize the unusual construction project, and to silence
critics who have spoken out against any subsurface structures at that
location. Now, staff must go back and re-engineer a fix for the redesign.
The city has hired a toxicologist to assuage immediate
health concerns over exposure to chromium 6 at the skate park. Their
risk assessment will undoubtedly minimize the dangers from exposure.
(In any case, the report won't be able to predict if concentrations
will be constant or what the health impacts will be if the skate bowl
cracks function as a conduit, drawing even more toxic groundwater onsite
and into the bowls.) Although some see this action as responsible, others
have asked why the city's zoning requirement for parent-signed environmental
waivers has not been fully implemented. Perhaps the answer is linked
to the fact that there is no city staffing of the skate park, a strategy
devised to relieve the City of Berkeley from any direct liability.
Even so, the city has had to bear the liability of its
mismanagement and engineering errors. In private industry, this project
would have nudged the contractor towards bankruptcy, or at least, would
have cost a few of its company's engineers their jobs. The cost for
the Harrison skate park, with its series of overruns and poor decisions,
now stands at more than $800,000! Additionally, more than a half million
dollars has been spent for the hundreds of staff hours consumed by this
There are alternatives to this fiscal madness. Santa
Cruz has a portable, above-ground skate park. No chromium 6, no young
skateboarders navigating their way through industrial corridors, and
all for a fraction of the price Berkeley has paid. (So far.)