Alternative Landfill Cover Project Profiles:
Monolithic ET Cover at Yucaipa Landfill, CA
Monolithic ET Cover at Yucaipa Landfill, CA
Last Updated: October 7, 2003
Site Information
Site Name, Location:
Yucaipa Landfill, Yucaipa, CA USA
(EPA Region 9)
Site Type:
MSW landfill
Superfund Site:
No
Federal Facility:
No
Bottom liner:
No
Climate:
Semi-arid climate with seasonal highs ranging from 60-95 degrees F and lows ranging from 40-60 degrees F.
Annual Precipitation:
15 in
Project Information
Project Name:
Monolithic ET Cover at Yucaipa Landfill, CA
Project Scale:
Full scale
Demonstration Program:
Not a demonstration project
Project Status:
Installed
Date Installed:
1997
Project Description/ Purpose:
A monolithic ET cover was installed in 1997, and in order to obtain final approval, performance monitoring has been ongoing.
Regulatory Status:
Conditionally approved
Monitoring System:
Two monitoring stations were installed in January 1998, which measure soil moisture using time domain reflectometry probes to a depth of 6 feet. A weather station was also installed at the site. Additional monitoring, such as air quality, water quality, and vadose zone gas concentrations, is also conducted.
Cover Information
Cover Type:
Monolithic Evapotranspiration
Design of Cover:
48 inches of silty sand (native soil)
Cover Installation:
Soil had a saturated hydraulic conductivity of 5x10-5 cm/s to 5x10-6 cm/s, when compacted to 90% of maximum dry density.
Drainage Layer:
No
Biointrusion Layer:
No
Gas Collection Layer:
No
Water Balance Model:
LEACHM
Modeling Results:
Ten consecutive years with the most precipitation were used for the simulation (average annual precipitation = 18.5 in and 1-year maximum precipitation = 40 in). The model compared an ET cover with native soil and a conventional cover with a hydraulic conductivity of 1x10-6 cm/s. Cumulative percolation over 10 years was approximately 12 cm for the ET cover and 20 cm for the conventional cover.
Designer Name:
GeoSyntec Consultants
Performance Data Available:
Yes
Summary and Description of Performance Data:
Two and a half years of soil moisture data (1/98-5/00) show that actual soil moisture content was comparable to that predicted by the LEACHM model. Soil moisture ranged from approximately 0.1 to 0.3 vol/vol over the 2 and a half year period.
Point(s) of Contact
Primary Contact
Role in Project:
Organization:
GeoSyntec Consultants
Name:
Bert Palmer
Address:
2100 Main Street, Suite 150, Huntington Beach, CA 92648
Kavazanjian, Edward, Jr. 2001. Design and Performance of Evapotranspirative Cover Systems for Arid Region Landfills. 36th Annual Western States Engineering Geology and Geotechnical Engineering Symposium, 28-30 March 2001, University of Nevada, Las Vegas, Nevada. Pages 11-26.
Email from Edward Kavazanjian, GeoSyntec Consultants, to Kelly Madalinski, EPA. July 28, 2003.
