Seepage in basement its7ft below ground level?

Question:the seepage also carries white grit any help thanks Terry

Answers:
sound like your wall have lost the outer covering they put on when it was built i had this happen and had a company come in and do a trench inside all around the inner walls and put a hole in the low side of the basement floor an a sump pump pumping the water to the outside of the house the foundation need s also to be checked by the company doing the inside work also. hope this helps need it done yesterday