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Halby Chemical
Site Photos
Please click the photographs to view them full size.
Aerial
view of Halby.
The
tidal marsh bordering the railroad tracks dividing the Halby and Potts
sites. This marsh is to be drained and filled, and a vegetated soil cover
will then be installed.
A
puddle of residues and rainwater collects at the edge of the on-site lagoon
and the railroad tracks. This entire area is to be drained and paved.
The
in-situ carbon disulfide stabilization process in action -- it was complete
in 1998. The crane-mounted auger churned the soil in place, while sodium
percarbonate was mixed in, rendering the highly reactive cabon disulfide
into harmless compounds.
In
Sept. 1999, ERM installed cartridges to monitor the level of off-gassing,
if any, from the stabilized carbon disulfide. If significant levels had
been detected, then the design of the cap would have been modified to
include a mechanism to allow the gas to escape, preventing it's buildup
under the pavement.
The
edge of the on-site lagoon, Sept. 1999. In order to mitigate the loss
of these wetlands, the preservation or restoration of wetlands at another
location will be performed.