Maybe lumnari has a point... I've been in the same boat, something definitive would be great. This post gave me something to mull on. IMO, as I have worked in a soils lab; the geotextile process is not a "Set it and forget it" system. The soil being processed will constantly change in type and make up; therefore, it will take a constant treatment of the water before entering the geotextile tubes. Example: The amount of clay in the material will affect the efficiency and rate of purging (Realize I have none of the specifics). Therefore how can you ever say the problem is "solved" when it takes continuous monitoring and adjusting? If I paid that must for a system to purge water of impurities, it would surely come with a company specialist to make sure it worked properly. In summary I think worrying about the "water problem" is "Beating a dead horse". Bottom line is how much gold is recovered.