Objective 3: Create Landfill Cap Material

Multiple PPS materials will be tested to provide CLL with the most practical composite cap system.  Cap systems presented to CLL will meet necessary Environmental Protection Agency (EPA) and ADEQ regulatory guidelines for an alternative landfill cap.  Testing cap material characteristics and performance will be completed by Wolf Engineering in NAU laboratories and subcontracted material testing firms as necessary. Objective 3 has been broken into the following tasks:

Task 5 – Identify regionally available resources for use in a composite alternative landfill cap. The identified materials will be evaluated for cost and resource availability. Results of resource investigations will be included in a final report.

Task 6 – Determine applicable state and federal standards for the implementation of a final landfill cap system, including required performance characteristics of cap materials.  All applicable standards will be summarized and presented in a final report.

Task 7 – Identify CLL site-specific constraints and requirements for alternative landfill capping materials.  Site-specific constraints and requirements will be mimicked during tests conducted by Wolf Engineering and listed in a final report.

Task 8 – Create multiple PPS-based materials for use in a composite alternative landfill cap system using resources identified in Task 5.  The composition of materials generated for testing will be included in a final report.

Task 9 – Conduct literature and method reviews to identify laboratory procedures and equipment for testing cap material characteristics. 

Task 10 – Test the characteristics and performance of developed composite alternative landfill capping materials using methods identified in Task 10.  A discussion of testing results and a complete listing of data generated will be included in a final report. Material characteristics tested will include: