Design & Installation of Landfill
Cap Systems
Allwest is experienced in all phases of Landfill Cap Systems from initial design to final installation. Allwest has coordinated soil importation programs for large volumes of soil cap material, through to cap installation. Additionally, Allwest is experienced in the important maintenance of installed caps and implementation of quality control programs.
- Preparation of Landfill Cap System Specifications
- Selection of Soil Material
- Establishment of Cap Construction Procedures
- Test (Surcharge) Pad Construction & Evaluation
- Subgrade & Site Preparation
- Placement of Soil Materials
- Quality Control Programs
- Material Evaluation and Testing
- Documentation
- Soil Cap and Geosynthetic Membrane Installations
- Soil Importation Programs
Design & Installation of Landfill Gas Control/Treatment Systems (LFG)
Allwest personnel have designed, installed, and maintained several gas control/treatment systems at major landfill facilities to the satisfaction of local, county, and state regulators including the Department of Toxic Substances Control (DTSC).
- LFG Horizontal Collection Systems
- LFG Off-Site Migration Control Systems
- Condensate Collection and Disposal Systems
- Blower/flare Station Design, Permitting, Installation, Operations, & Maintenance
- LFG Monitoring Systems
- System Permit Document Preparation
Design & Installation of Groundwater Extraction & Leachate Collection and Treatment Systems
Allwest's engineers have years of experience designing successful, customized groundwater extraction system meeting pre-established goals and objectives. Allwest's experience in the operations and maintenance of these systems keeps them on-line, running efficiently, and operating effectively.
- Groundwater Extraction System Design & Installation
- System Operations & Maintenance
- Preparation of Operations Manuals
- Groundwater Monitoring Programs
- Groundwater & Leachate System Inspection, Examination, and Testing
- Design, Installation, Operations, and Maintenance of Leachate Collection, Treatment, and Disposal Systems
Construction Services
Allwest's Construction and General Contracting capabilities separates us from other environmental consulting and engineering firms by allowing us to provide that continued service from initial design to final installation. The following is only a sample of the services our personnel have been providing to customers for decades.
Construction Management- Heavy Equipment Operations
- Soil Excavation & Placement Operations
- Soil compaction Testing & Reporting
- Screen and Crush Concrete & Waste Materials
- Preparation CMB and Class II Road Base Materials
- Guaranteed Maximum Insurance Policy Programs
- Active Facility Compliance Programs
- Preparation and Implementation of Post-Closure Plans
- Hazardous waste, air toxics, and water resources
- Air Quality Compliance Programs and Monitoring
- Rule 403 Fugitive Dust Control Measures
- Design and Implementation of Reasonable Available Control Measures (RACM's)
- Airborne asbestos fiber surveys
- Methane gas testing
- Leachate collection systems
- Solid Waste Assessment Testing (SWAT) and water programs
- Soil-gas/methane testing to confirm the extent of landfill gas migration
- Installation of monitoring wells for review of gas migration
- Mobile laboratory analysis of landfill gases
- Confirmation of landfill collection system compliance
- UST Compliance Programs
Landfill Regulatory Compliance and Permitting
Presentation of a well conceived plan and the ability to carry out that plan is the most effective way of handling the bureaucratic process. Allwest has always been held in high esteem with the regulatory community as a company that presents effective solutions and see's the job through to a completed success.
Facility Audits
- 40 CFR Part 265, subpart G
- 22 CCR Chapter 15, Article 7
- 23 CCR Chapter 15, Article 8
- Clean Air Act
- Ocean Dumping Act
- Clean Water Act
- Federal Insecticide, Fungicide and Rodenticide Act
- Safe Drinking Water Act
- Toxic substances Control Act
- Resource Conservation and Recovery Act
- Comprehensive Environmental Response, Compensation and Liability Act
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