Looking at bidding for one of the local cities here. First city bid and would like to know if it is normal for them to ask for ten percent of the total bid price to be included with the bid? I understand proof of Ins. and Workmans Comp., I have both and they are also asking for referrences. Any other things to consider. I will not intentionally low bid it. The work would be nice but I will not go broke on my account.