To bring the water through the wall, it has to be hollow, right. So you probally never dealt with that type, since youz pour all yours. Anyways, the idea is to lower the groundwater table. You probally had to dewater some pits in that million foundations. So you may know you can do it from a well or pit close to the site. It doesn't have to be six inches outside the footing or twelve inches inside the footing, thats pretty irrellevant. So an inside trench can lower the table.
And it looks that that guy Mark that started this mess won't like you opinion cuz its your family that does the work, not really you. When did you find time to type. So your family averages 55 foundation a day, 7 days week? I dont even think THE family can do that, Nico.