How to Reduce Earth Grounding Resistance Below 1ohm

Ground Resistance - It's Not What You Think (12-30-99)
DEEP EARTH GROUNDING
Designing for a Low Resistance Earth Interface (grounding

Have delivered a large quantity of seawater, and tip it into the pit.

1. Provide more electrodes.
2. Piss on them more. Beer is a good start.

Make sure the grounding rods are copper coated. Use more, longer and closer spaced in a larger grounding area. Put some more rods in another area in the vicinity and connect the cable to the other area's rods. After all this is done call the local fire dept and have them conduct a drill on the property. Make sure you arrange for large quantities of water to be used. They love to use their nozzles. Beer for them also helps. If you are located in a salt water subsurface area put all this in that area.

Good Luck, Old Salt

Why dont you try Chemical Electrolytes as Earth Resistance reducing agents. They can reduce the resistance by 65-70%.

For an instrument clean earth connection, the difference between 1 ohm and 2 ohms matters "not a jot".

For power earth, it is the earth loop impedance that matters. Provided the installation is compliant with the contents of British Standard 7671 upon testing before handover, then the actual value is largely irrelevant.

Hope your not using cooper rods in your pit, ammonia and copper don't get along very well. the corrosion alone will be an on going problem.

Why is <...contaminated ammonia water present...> and what is being done about it?