The rule is 2 bags per account per day, and 2 accounts per household. I do not know if they enforce that rule. If you have more to drop off they say to call and make an appointment. I tried to do that once, and they said I had to come on a week day during business hours.
Yes there is if your dropping them off and having them do it. Otherwise you can take as many bags you want as long as you're doing the work.
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