W.R. GRACE CAUSED AMMONIA TO ENTER AN UNDERGROUND SOURCE OF DRINKING WATER. IN THE '60S IT OPERATED A FACILITY THAT PRODUCED AGRICULTURAL FERTILIZER, WHICH TRAVELED TO THE MOTOR WHEEL DISPOSAL SITE. THE AMMONIA IN THE RUNOFF LEACHED INTO THE GROUND AND CONTAMINATED THE SAGINAW AQUIFER, WHICH PROVIDES DRINKING WATER FOR LANSING, MI.