Below are descriptions of the projects that Semper Environmental has completed (or is working on) since our inception in July 2017. For all projects listed, Semper Environmental has worked in a subcontractor role, but our contribution in each project has been significant and often times has been in a project-lead capacity.

U.S. Army Tooele Army Depot —
South Area OB/OD Baseline Soil Concentrations

Semper was subcontracted by AQS, Inc. to determine baseline surface soil concentrations for a newly permitted Open Burn/Open Detonation (OB/OD) facility at the Tooele Army Depot—South Area, in Utah. Semper assisted in planning, including coordination and a site visit with environmental regulators, and was responsible for procuring and coordinating with an analytical laboratory. Semper Environmental developed the standard operating procedure and designed the sample units and decision units for the Incremental Sampling Method (ISM) that was used. Semper performed and managed the ISM field sampling and provided GIS mapping support and technical review for the Work Plan and Sampling Report. The project was completed with no issues and on time and within budget. The Army and AQS clients and the Utah Department of Environmental Quality (UDEQ) were very satisfied with the work and the results. The project established the background soil concentrations of organic and inorganic compounds which future soil sampling results will be compared to for this new Army OB/OD facility.

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Utah National Guard—Military Munitions Response Program Historical Records Review and Support for Site Inspection

Drawing on our staff’s significant experience with the Military Munitions Response Program (MMRP), Semper Environmental is helping the Utah Army National Guard and their contractor better understand the history of a new munitions response site (MRS) identified near Camp Williams, Utah. The site is a hill located in a large residential neighborhood where 37mm projectile fragments were recently found by a child with a metal detector. As a subcontractor to Parsons, Semper Environmental completed an Historical Records Review (HRR) and is providing technical consulting to Parsons for the design and performance of a Site Inspection (SI) of this new high-priority MRS. Semper provided review and technical input to Parsons for the SI Work Plan and Unified Federal Policy-Quality Assurance Project Plan (UFP-QAPP), and helped plan and design the upcoming SI field work. As the sole author of the HRR Report, Semper conducted numerous interviews, researched a multitude of historical archives and documents, and evaluated historical aerial photographs and maps. The research showed that the hill was likely used just after World War I, and Semper uncovered evidence that the Utah National Guard may not have been the responsible service branch that impacted the site. The HRR Report was submitted to Parsons and ultimately reviewed by the Utah National Guard client and the National Guard Bureau. Only minor comments were received and no changes to the HRR report were requested.

Municipal Landfill—Wasatch Landfill Groundwater and Landfill Gas Monitoring

Semper Environmental is teamed with AQS, Inc. to provide groundwater and landfill gas monitoring and reporting for the Wasatch Landfill in Davis County, Utah. Semper performs and manages all fieldwork for the project including coordination with the analytical laboratory. Fieldwork includes quarterly low-flow groundwater sampling for a large network of monitoring wells (depths range from 40 to 480 feet); measurement of monitoring well water levels; quarterly explosive gas monitoring; and bi-weekly extraction gas sampling, including performing optimization adjustments to the landfill’s extraction gas system. Semper also provides technical input and review of the quarterly groundwater sampling reports. The contract is ongoing and we have completed our first year of a five-year contract with zero issues. The Semper/AQS team has completed all required groundwater/gas monitoring and related reporting on schedule and with data that meets the project data quality objectives. In doing so, Semper/AQS is ensuring the landfill client remains in compliance with their permit and regulatory requirements. The landfill client is very satisfied and has stated such.

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U.S. Army Dugway Proving Ground Monitoring Well Downhole Camera Survey and Report

Semper Environmental was brought in to assist another contractor that was having difficulty sampling several deep monitoring wells at the U.S. Army Dugway Proving Ground (DPG) facility in Utah. It was suspected that well performance was a possible cause. Semper teamed with AQS Inc. and Argonne National Laboratories to complete a downhole video camera inspection of all monitoring wells at a waste water treatment facility and at the primary landfill at DPG. Well depths ranged between 150 and 240 feet below ground surface. Semper performed all planning, equipment procurement, fieldwork, and reporting for this project. Obstructions and well screen fouling were identified at several locations. At the conclusion of the camera survey, a Semper hydrogeologist provided a detailed report of findings and proposed recommendations to address the issues identified. If implemented, the solutions recommended by Semper Environmental will save the cost of installing new monitoring wells and will ensure the Army remains in compliance with groundwater monitoring and data quality requirements.

U.S. Army Tooele Army Depot, South Area — RCRA Facility Investigation and Hydrogeology Technical Consulting Support

Semper Environmental was contracted by Parsons to assist them in completion of the final stages of a large and complex RCRA Facility Investigation (RFI) at Tooele Army Depot—South Area, Utah, and to provide hydrogeological consulting support for the Army facility’s long-term groundwater monitoring program and plan. The RFI addresses two large sites—solid waste management units (SWMUs)—covering over 1,800 acres where munitions and chemical warfare materiel (CWM) were historically burned and buried in hundreds of large trenches and pits. Numerous groundwater contaminant plumes of chlorinated solvents are present at these sites. Semper assisted Parsons with groundwater-related comments made by the Army and the Utah Department of Environmental Quality (UDEQ) on the Draft and Draft Final versions of the RFI Report. Semper provided responses to comments and made related document changes and improvements in order to facilitate Parsons completion of the Final RFI report. In addition, technical staff at the Tooele Army Depot South Area requested Semper Environmental’s help in addressing UDEQ regulator comments on the installation’s base-wide long-term groundwater monitoring plan. In this capacity, Semper analyzed well logs and reviewed chemical and other environmental data from numerous sites around the installation. Semper used this information to help Parsons and the Army with technical sections of the monitoring plan and Semper developed a 3D block diagram depicting the base-wide conceptual site model for groundwater at the installation. 

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U.S. Army Dugway Proving Ground Monitoring Well Elevation Survey and Report

Semper Environmental was asked to help resolve an apparent groundwater flow direction anomaly in order to help the US Army plan for expansion of the primary landfill at Dugway Proving Ground, Utah. Under contract with AQS Inc. and Argonne National Laboratory, Semper Environmental completed a new top-of-casing elevation survey and revised water-level measurements for all monitoring wells at the English Village Landfill at DPG. Drawing from a network of familiar and high-quality subcontractors, Semper procured an established and reputable surveyor with prior survey experience at DPG. The surveyor also used best-in-class digital level survey equipment approved by the National Geodetic Survey for 1st order survey work. At completion, the new survey identified and corrected a significant error in the published top-of-casing elevation for one of the wells. Further, the final closure for elevation on the network of monitoring wells was less than 0.001 feet, indicating a very high quality and precise survey for the Army at DPG. Surprisingly, the revised top-of-casing elevations and water-level measurements did not result in a change to the anomalous groundwater flow at the landfill. A Semper hydrogeologist reviewed additional data and information sources and provided a comprehensive report of the re-survey that included a detailed interpretation of the likely cause for the apparent groundwater flow anomaly. The report also included recommendations to help the Army better plan for anticipated groundwater monitoring requirements if and when the landfill expansion takes place.

Summit County/DK Environmental—Large Surface Soil Confirmation Sampling Program

Semper Environmental was contracted by DK Environmental of Park City, Utah to help them on short notice with a new large field sampling program as part of their contract with the Summit County government. The land in question is associated with historical Park City silver mining activities and was being considered for purchase. The United States Environmental Protection Agency (USEPA) was one of the stakeholders involved due to the property’s proximity to an area of known metals contamination. The sampling project involved collection of four-point composite samples over a 120-acre parcel. The objective was to complete the sampling in short order and before winter and frozen ground set in. Semper provided four qualified field staff to work with DK’s sample teams to collect over 2,000 surface soil samples on this property. The project was completed on schedule and with no issues, and favorable reviews of the project and sampling teams were given by the on-site USEPA representative.

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Badlands Bombing and Gunnery Range—Military Munitions Response Program Decision Documents

Semper Environmental is contracted with AOR International to write Decision Documents under the Military Munitions Response Program (MMRP) for three Munitions Response Sites (MRSs) in the former Badlands Bombing Range of South Dakota. The sites were previously the subject of an interim remedial action and a Focused Feasibility Study and a Proposed Plan were also completed. Information from these previous investigations and documents is being synthesized by Semper into a Decision Document. When complete, this report will be submitted to AOR and ultimately to their client at the US Army Corps of Engineers, Omaha District.