HomeMy WebLinkAbout1990-06-12 - AGENDA REPORTS - ELSMERE CANYON WATER STUDY (2)CONSENT CALENDAR
DATE: June 12, 1990
SUBJECT: ELSMERE CANYON
DEPARTMENT: Public Works r
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BACKGROUND
AGENDA REPORT
City Manager Approval
Item to be presented b :
A
STUDY
John E. Medina
At the Council's request, we have met with the local water purveyors and the
Castaic Lake Water Agency to discuss mutual concerns regarding potential hazards
to the groundwater supply of the Santa Clarita Valley as a result of the siting
of the proposed Elsmere Canyon Landfill. It was agreed that we would all share
in the cost of using.Richard C. Slade, Consulting Groundwater Geologist, who has
done -several studies and is familiar with the groundwater basin in the Santa
Clarita-Valley. Attached is a copy of the letter from Mr. Slade which describes
the issues which he feels need to be addressed in the siting of the proposed
landfill.
The following is a summary of the issues enumerated in Mr. Slade's letter:
• Geologic - Sufficient historical data and field investigations are
necessary to clearly understand the geology at, and adjacent to, the
proposed site.
• Geologic Structure - Bedding planes, their direction and depth as well
as existing faulting in the area must be complete, without gaps, and in
sufficient detail to determine what effect they may have on the
landfill, and more importantly, on the surrounding area.
• Hydrogeologv - Develop data on the expected.flow of underground water
as it relates to the geology of the area and the effects of a landfill
on this groundwater system.
• Hydrologic - The effects of surface water run-off through the landfill
area.
• General - This relates to a clear direction and support by consultants
registered in their field of expertise, the mitigation measures
proposed, and the integrity of the liner system required by State law
for non -hazardous landfills.
These are certainly not all of the concerns regarding the proposed Elsmere
Landfill. They are simply those which we feel are necessary and must be
considered in the environmental impact process. We propose to send this
information along -with the Council's input on the report to the Los. Angeles
County Sanitation District, the Department of Agriculture, United States Forest
Service for inclusion in the environmental process. A copy will also be sent to
APPROVED Agenda Item:�
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the City, County of Los Angeles, as well 'as to BKK. This letter will be signed
by the City, the Castaic Lake Water Agency, and the Santa Clarita Valley Water
Association which represents the local water purveyors.
We believe that the environmental process which includes all of these issues
will help .all of us assess and have a better understanding of the impacts of
this landfill on our groundwater supply.
Mr. Slade will be available at the meeting to discuss his report.
Authorize the City Manager to sign a joint letter with the water agencies
transmitting the consultants listing of items required to be addressed. Letters
are to be sent to the Los Angeles County Sanitation District, the U.S. Forest
Service, the City of Los Angeles, and legislative representatives that need to
be aware of the concerns expressed by the City, the Agency, and the water
purveyors.