Project Profile: Sapp Bros. Travel Centers Water/Wastewater System Assessment, Engineering, Repairs & Consultation
“There’s something in the system that’s not operating correctly or it’s not big enough, we’ve outgrown it,” Kolkman said.
CGRS Water/Wastewater Project Engineer Kristan Buck, PhD, CWP, took the lead on the project.
“It is unclear at this time if issues with the wastewater treatment system performance or issues with the monitoring well and/or any surrounding environmental factors are causing the water in the well to be high in nitrate concentration,” she said.
CGRS started assessing the system and historical monitoring well data in August 2020, submitting a Preliminary Engineering Report outlining a plan for further study and sampling to Sapp Bros. and the Wyoming Department of Environmental Quality (DEQ).
“Our outreach and sampling program got underway in January 2021,” Buck said. “We are working with the businesses connected to the wastewater system to monitor and, where necessary, improve their pretreatment practices.
“We are sampling the effluent from the wastewater treatment system to see if it may be the source of the high nitrate concentration in the monitoring well. We will also review data from other monitoring wells and the types of land use in the near area to see if there are other potential sources of nitrate in the groundwater,” she added.
With help from the local vendors who maintain the system, CGRS has identified issues with proper drainage in the pipes in the leach field. CGRS mobilized to the site on April 12 to repair a line in the drain field that didn’t have proper grade for gravity flow, and wrapped up work the next day, before inclement weather set in.
Kolkman said he received no calls and the crew finished ahead of schedule, so he knows they “did just fine.”