Aestus, LLC articles

Aestus performed our GeoTrax Survey to determine potential environmental liabilities at this abandoned gas station site. We discovered a previously unknown buried tank (see image above). The client removed the leaking tank and impacted soils before construction began on this redevelopment project.

Our client was pleased that Aestus’ GeoTrax Survey identified this problem area before impacts to the construction schedule occurred. Our survey also focused remediation activities on

Aestus performed our GeoTrax Surveys to asses the performance of a DNAPL recovery system installed within a waste pit at a hazardous waste landfill. The two remediation wells along our survey transect had been “clean” for two years prior to our confirmation survey work. The GeoTrax Survey results indicated that recovery wells have achieved significant reduction of DNAPLs near the source areas and within the wells’ actual zone of influence which was significantly smaller than

Reducing Risk in the Brownfields Process
If a Phase 1 ESA for a prospective Brownfields investment property indicates environmental impacts are possible or likely, Aestus offers Phase 1.5 Site Inspection scanning to image the site’s subsurface at much higher data density. This non-intrusive screening approach provides a better understanding of subsurface challenges and risks, reduces uncertainties, and makes your investment decisions more profitable. As an added be

Bottom Line:

• GeoTrax Survey was used to locate the source of fresh water springs in the Great Artesian Basin (GAB), South Australia
• Blue zones shown above represent the interpreted distribution of upwelling of GAB fluids to the spring mounds
• Green rectangles shown above represent spring dependent surface vegetation
• Yellow circles represent inferred connections to surface based on GeoTrax imaging
• The white line in center o

Bottom Line:

• Vertically oriented anomalies confirmed to be LNAPL and related dissolved phase contamination; these vertical features would be hard to detect/bound using wells alone (without a high resolution scanning tool like GeoTrax SurveyTM).
• Remediation was ongoing at this gas station site; horizontal air sparge/SVE wells had been installed and were operating before the GeoTrax Survey™ were performed.
• The brown conductive anomalous

Aestus was asked to assist with a dry cleaners site which was operational from 1945 to 1977. The state led cleanup involved a soil excavation and series of bioremediation injectates. The existing monitoring well network showed PCE concentrations above regulatory standards following the remediation attempt. Aestus used our non-invasive ultra-high resolution subsurface scanning method to image the site and update the CSM

Aestus integrated historical and targeted confirmation drilling da

Our GeoTrax Survey technology was used to verify the effectiveness of 10 years and ~$1.4M worth of investigation, pump/treat, surfactant flushing, and oxidizing compound injection. The GeoTrax SurveyTM detected “blobs” of LNAPL (gasoline) remaining between remediation wells as shown above. An EPA managed boring program confirmed the survey results; samples were collected from each boring at 0.5 feet intervals and analyzed for total petroleum hydrocarbons (TPH). The highest TPH val