A third location that exhibited a soil geochemical anomaly of 557 ppb Au, was drill tested and logged as a sulphidized Iron formation hosting 40% Po and 5% Py (Henriksen 1988).

Source: https://investingnews.com/bold-ventures-reports-progress-at-the-farwell-gold-copper-project/

Both spikes are more than twice the federal ambient air quality standard of 75 ppb.

Source: https://www.denver7.com/news/front-range/commerce-city/air-monitors-detect-sulfur-dioxide-spikes-from-suncor-refinery-in-commerce-city

Encouraging Soil Samples: Soil samples from a 2020 soil sampling program returned values ranging from 5 parts per billion (ppb) gold to 32 ppb.

Source: https://investingnews.com/gander-gold-commences-drilling-in-newfoundland/

Encouraging Soil Samples: Soil samples from a 2020 soil sampling program returned values ranging from 5 parts per billion (ppb) gold to 32 ppb.

Source: https://investingnews.com/gander-gold-commences-drilling-in-newfoundland/

EPA’s maximum safe level for TCE in potable water is five ppb.

Source: https://www.lawsuit-information-center.com/camp-lejeune-water-lawsuit.html

Sample TC202 returned 5031 ppm (0.5%) copper, 299.3 ppm molybdenum, 2.8 ppm silver, 856.3 ppb gold, 2.16% iron and 0.75% sulphur (aqua regia digestion).

Source: https://thegrizzlygazette.com/media-release/completion-of-property-acquisition-by-geologica/?utm_source=rss&utm_medium=rss&utm_campaign=completion-of-property-acquisition-by-geologica

The data are reported in parts per million (ppm) for CO and parts per billion (ppb) for CH.

Source: https://phys.org/news/2023-01-greenhouse-gas-analysis-global-satellite.html

The model found the maximum concentration around the facility would have been eight times as high as the 75 ppb threshold.

Source: https://grist.org/project/accountability/koch-oxbow-port-arthur-texas-clean-air-act-pollution/