There is no set amount of time that a hazardous condition must be present before an injury occurs. It is more a question of reasonableness and notice of that hazard to the property owner. Was the incident reasonably foreseeable? Did the property owner have actual or constructive notice of the hazardous condition before hand? These are the types of questions to explore in this type of case. The facts and circumstances vary widely on each individual case, so it is very important to contact a personal injury lawyer right away if you have been injured on someone’s premises to find out if they are liable.