Pre-Purchase Land Environmental Risk Screening: Prairie Gateway Land, Rocky View County, Alberta

Zolena Lab conducted a pre-purchase environmental risk screening of a 100-acre industrial reserve parcel located at Township Road 232 and Range Road 283 in Rocky View County, Alberta — within the approved Prairie Gateway Area Structure Plan zone, approximately 5 minutes from the Calgary Ring Road (Stoney Trail) and adjacent to the CPKC main railway line.

Using Sentinel-2 L2A satellite imagery from the Copernicus open data programme, we analyzed the parcel's current environmental state, four-year historical trajectory, surrounding environmental pressure sources, and climate hazard history. All findings are derived exclusively from satellite-observable surface indicators — not self-reported by the asset owner or selling agent.

The parcel carries a Medium-Low (L2) composite risk profile. The environmental baseline is sound: predominantly agricultural land with good vegetation coverage, no major watercourse within the parcel boundary, no detected hydrocarbon seepage signatures, and low wildfire and flood history. The primary satellite-observable finding requiring formal due diligence attention is a 7.5% decline in the NDVI vegetation health index between 2020 and 2024, concentrated in the western approximately 24 acres — consistent with construction disturbance or hardscape expansion associated with the known northwestern structure.

The most recent Sentinel-2 imagery (summer 2024, cloud cover less than 20%) shows the parcel is predominantly agricultural land with intact vegetation coverage. The RGB true colour composite confirms no large-scale hardscaping, visible contamination plumes, or anomalous surface features across the main parcel body.

SWIR analysis shows healthy vegetation moisture across most of the parcel area, expressed as bright green signature in the B11/B8/B4 composite. The northwestern quadrant contains a built structure with a high-reflectance white body — consistent with a farm building or light industrial facility — surrounded by a managed compound area. The southeastern quadrant shows yellow-orange SWIR tones indicating lower soil moisture or mild surface disturbance in that zone.

No hydrocarbon seepage signatures or anomalous thermal hotspots were detected within the parcel boundary at the 10-metre resolution of the Sentinel-2 sensor. The CPKC railway line is clearly visible at the northern edge of the analysis area, consistent with public infrastructure records.

Comparing summer 2020 and summer 2024 Sentinel-2 imagery on a same-season basis reveals a statistically meaningful decline in vegetation health across the parcel. The 2020 baseline shows a greener, more uniformly vegetated landscape. By 2024, the parcel shows increased brown and bare soil signatures, particularly in the western half of the parcel.

The NDVI change heatmap spatially locates the decline. Approximately 24 acres representing 25% of the parcel show NDVI decline exceeding 0.1. The most significant decline zone is in the northwest quadrant, coinciding with the location of the known built structure — suggesting construction activity, hardscape expansion, or vegetation clearance associated with that facility between 2020 and 2024. Secondary decline zones appear in the upper southwest area and the southeast corner.

This spatial pattern is consistent with localised land preparation activity rather than diffuse chemical contamination, which would typically produce more dispersed NDVI anomalies. However, satellite data alone cannot definitively distinguish between benign construction activity and early-stage subsurface contamination. Formal due diligence is required to verify the specific land activity record for the western zone.

A 500-metre buffer analysis identifies external pressure sources that could transmit environmental risk to the subject parcel through air, water, or soil pathways. The following sources were identified using Sentinel-2 land classification and public infrastructure records:

This Lite Edition addresses the question: is there anything obviously wrong with this parcel? The Pro Edition addresses the question: where exactly could problems arise, and how significant are they? Four dimensions were outside the scope of this Lite report:

This case study is produced by Zolena Lab Inc. (Calgary, Alberta, Canada) based on publicly available satellite remote sensing data and open environmental databases. All findings are derived from satellite-observable surface indicators and publicly available records. No proprietary or commercially purchased satellite data was used in this analysis.

This report does not constitute a Phase I or Phase II Environmental Site Assessment as defined under ASTM Standard E1527 or Canadian Standards Association Z768. Zolena Lab Inc. is not a licensed environmental engineer, legal advisor, or regulated environmental professional under Alberta or Canadian law. This report is intended as a preliminary desktop screening tool and does not replace formal environmental due diligence conducted by qualified professionals.

Sentinel-2 satellite spatial resolution is 10 metres per pixel. Surface features smaller than 10 metres may not be detectable. Sub-surface conditions cannot be assessed through satellite remote sensing alone.

AOI Note: The analysis area of interest (AOI) was defined by visual calibration against Google Maps satellite imagery and road intersection references, and differs from the LoopNet listed area (100.86 acres) by approximately 5% due to rectangular approximation. This AOI is not a legal cadastral boundary. For a precise legal parcel boundary, engage a licensed Alberta Land Surveyor.

Algorithm Reference: Du, K. et al. University of Calgary, Schulich School of Engineering. CC BY 4.0 open licence.