DEPARTMENT OF THE ARMY
ETL 1110-1 -162
U.S. Amy Corps of Engineers
CECW-E
Washington, DC 20314-1000
Technical Letter
No. 1110-1-162
30 September 2001
Expires 30 September 2006
Engineering and Design
CHECKLIST FOR HAZARDOUS WASTE LANDFILL COVER
DESIGN
1. Purpose. This engineer technical letter transmits a document for the design of landfill
covers at hazardous waste sites. The document was developed to aid in project planning,
scheduling, and budgeting; scoping pre-design investigations and architect/engineer
services; as a guidance document for the design of landfill covers; and as a source for
technical references.
2. Applicability. This letter applies to HQUSACE elements, major subordinate
commands, districts, laboratories, and field operating activities (FOA) having hazardous,
toxic, or radioactive waste (HTRW) investigation, design, and remedial action
responsibility.
3. Distribution Statement. Approved for public release, distribution is unlimited.
4. References. References are listed in Appendix A.
5. Discussion. This document will focus on covers for hazardous waste sites as
described in the Code of Federal Regulations (CFR) 40 CFR 264. In general, the compo-
nents of a hazardous waste landfill cover consist of a protective cover la yer, a drainage
layer, a low-permeability layer composed of a geomembrane over a low-permeability soil
component, and random fill overlying the waste. Hazardous waste landfill covers also
contain some type of gas control system in many instances. This document is divided
into three appendices: Appendix A, References; Appendix B, Hazardous Waste Landfill
Cover Design Considerations; and Appendix C, Hazardous Waste Landfill Cover Design
Checklist . Appendix B briefly discusses design aspects for the cover components.
Appendix C contains a list of questions covering pertinent aspects of design that were
discussed in Appendix B.
b. The topics listed in this document are to be considered in the design of landfill
covers for hazardous waste sites. It is strongly recommended that input be sought from
the appropriate technical staff for all phases of design and construction of landfill covers.
The involvement of in- house technical expertise is essential to providing a cost-effective,
high-quality service to the customer.
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This ETL supersedes ETL 1110-1-162 dated 31 July 1995.
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