Groundwater Remediation Project
The District has been working closely this past year with
Sacramento Groundwater Association (SGA) Contamination Committee
in addressing regional groundwater contamination issues. The
committee has developed four main objectives:
| |
1. |
Raise awareness of
the growing groundwater contamination to the regulators |
| |
2. |
Delineate and contain
groundwater contamination plume |
| |
3. |
Expedite the cleanup
efforts |
| |
4. |
Develop a plan for
an advanced replacement water supply |
On November 5 the committee met with Regional Water Quality
Control Board (RWQCB), Environmental Protection Agencies
(EPA), State Water Quality Control Board (SWQCB), Department
of Toxic, (DTSC) and the Water Forum to address the above
listed objectives.
The Regulatory Agencies agreed to meet with the SGA committee
on a monthly basis to address the technical concerns of
the water agencies. The Regulators also agreed to quarterly
meetings to discuss policy decisions regarding the groundwater
cleanup efforts.
In December Aerojet
released the Draft Additional Response Actions Report Western
Groundwater Operable Unit (WGOU-3) Aerojet General Superfund
Site. The report includes the results of the data collected
over this past year. The report presents the conceptual/preliminary
remedial design for Areas 3 and 4 of the WGOU. The remedial
action for WGOU addresses chemicals of concern in groundwater
in the Carmichael Community.
The Unilateral Administrative
Order requires Aerojet to construct groundwater extraction
and treatment system to prevent chemicals of concern from
migrating into CWD groundwater facilities and to restore
the groundwater aquifer to cleanup levels defined in the
Unilateral Administrative Order.
For the Carmichael
Area, the preliminary plan that Aerojet has developed is
to install 3 groundwater extraction wells, approximately
8,000 feet of pipeline and two treatment facilities. These
facilities will extract 900 gallons per minute from the
groundwater aquifer. The water extracted will travel through
the pipelines to two different treatment facilities where
chemicals of concerns will be removed. Once the chemicals
of concern are removed through the treatment process the
water will either go into the storm drain system and ultimately
to the American River or might be used as an irrigation
source for the Ancil Hoffman Park.
