Other structures include a warehouse, several drum and aboveground storage tank areas, an office building, a boiler facility, and a wastewater pretreatment facility. Empty drums, dismantled storage tanks and processing equipment have been placed in the northeast corner of the property. Two adjacent railroad sidings run parallel to and just outside the OCI property line on the south and east. The ground surface of the site is relatively flat due to the grading associated with the facility construction. The land surface north and northwest of OCI is lower than the rest of the area because of past sand and gravel mining activities.
Surface runoff is slow, and in general flows northwest toward the Grand River.
OCI is located 0.75 miles southeast of the Grand River, within the Grand River surface water drainage basin. The nearest surface water body to the OCI property is Roy's Creek, located approximately 1,000 feet to the northeast. Two groundwater systems, separated over most of the site by a clay layer, have been identified in the site area. The thickness of this clay layer ranges from a few tenths of a foot to 7.5 feet. Groundwater flow within the shallow aquifer is to the north-northwest toward the Grand River.