 Factors such as the weight/amount of the particular substance, age of the offender, and the number of offenses may impact eligibility for expungement as well.For example, in New Jersey, the threshold is 25 grams for marijuana and 5 grams for hashish if the offense occurred when the offender was 21 years of age or younger.Procedures for obtaining an expungement are different in each state, but tend to follow a similar process