The most expensive option would be to haul the contaminated soil to the Coopersville landfill, which is qualified to accept such material. The estimated cost for that is $70,000 to $80,000.
The other remedy is to berm the 650 cubic yards of soil and cap it with clay — estimated to cost $25,000 to $30,000.
Cotton said he believed the lower-cost method of leaving the soil onsite would be effective and could be paid for in part by savings from lower-than-expected project bids.
Cotton said he ordered phase 1 environmental testing on the land several years ago, but the U.S. Army Corps of Engineers in 2010 required more wetland delineation for the bike path project west of School Street.
Cotton said Monday night that he regrets not ordering more testing.
Councilmen Dave Bennett and Jim MacLachlan will comprise the advisory committee and be kept abreast of project developments.
To read more of this story, see today’s print or e-edition of the Grand Haven Tribune.