septic escrow in Washtenaw County, MI and septic recommendation

[Keri Middaugh]

Hello, I'm considering the purchase of a distressed home in a semi-rural area of Washtenaw County, Michigan for the purpose of a total rehab.  It has a well and septic system.  The seller tells me that the county will require an amount equal to 1.5 times the amount of a septic system replacement to be put into escrow in order to transfer title.  Has anyone had any experience with this?  I'd love your insight.  Also, I'll probably need a recommendation for a septic company.  Thank you!