i WANT TO DETECT THE 15 METERS HOLE THAT WE HAVE DUG. THERE WERE SIGNS THAT WE ENCOUNTERED WHEN DUG AND WE SMELLED CHEMICALS. WE ALSO EXPERIENCED ITCHINESS WHILE DIGGING. THE CIRCUMFERECE OF THE HOLE IS ABOUT 5 METERS. THERE ARE LOTS OF SIGNS DOWN THERE AND WE DONT KNOW WHERE TO DIG FURTHER/ PLEASE HELP ME. MY EMAIL ADD: [email protected].