ENVIRONMENTAL ENGINEERING & CONSULTING
PROJECT 1: Solid Waste Beneficial Use Recycling Engineering for a Sugar Beet Processing Facility
Landmark designed and implemented one of the first successful state-approved sugar beet spent lime recycling project at a former sugar beet processing plant in Greeley, Colorado.
Landmark evaluated the effectiveness, feasibility, and cost of recycling spent lime derived from the sugar beet processing for structural fill. Landmark conducted chemical analytical testing of the recycled lime and performed bench scale and pilot scale materials testing of several mixtures of the spent lime with soil. After analytical testing confirmed the spent lime was not an environmental concern, the optimum ratio of recycled lime to soil was identified through geotechnical testing.
Once the positive bench scale and pilot scale geotechnical results were identified, a Design and Operations (DO) Plan was developed to describe how the recycled lime would be placed on two separate properties. The DO Plan was approved by the Colorado Department of Public Health (CDPHE). Because one of the sites was located relative to the flood plain, and the planned design to elevate the property with the recycled lime mixture, a Conditional Letter of Map Revision Based on Fill was prepared for, and approved by, the Federal Emergency Management Agency. The fill placement project was successfully completed and is one of the leading examples in CDPHE’s Solid Waste Beneficial Use recycling programs.
PROJECT 2: Innovative and Cost-Effective Materials Management for Structural Water Reservoir Demolition
Landmark prepared and implemented an innovative Materials Management Plan to manage asbestos-containing material encountered during demolition cost-effectively.
Landmark prepared and implemented an innovative, cost-effective Materials Management Plan (MMP) and Sampling and Analysis Plan (SAP) for a concrete structural water reservoir demolition project. Prior demolition activities inadvertently caused asbestos-containing material (ACM) spill, which the nature and extent had been mischaracterized, resulting in project delays and a potential cost-prohibitive spill response. The purpose of the separate plans was to utilize less rigorous MMP procedures for the safe management of crushed concrete and soils while inspecting and testing for the presence of ACM. When no ACM or asbestos-containing soil (ACS) was identified, the material could be handled and processed by general contractors and used onsite for clean fill. When ACM was identified, the SAP was then followed to manage and properly dispose of regulated ACS.
The demolition was flawlessly executed. There were no notices of violation, project shutdowns due to fiber detections, or injuries during the project. Only one agency inspection was performed, and no adverse findings occurred.