Based on the information reviewed, IDPH concludes:
- The Matheson Gas Products, Inc., site poses a public health hazard because of the drowning hazard posed by the Quarry Pond and because of the opportunity for chronic exposure to lead, benzo(a)pyrene, chrysene, and arsenic that could cause adverse health effects. The site is not completely fenced to restrict access to the Quarry Pond, and the double fence surrounding the tar pit is partially down and easy to climb. Trespassers, especially children, could fall and drown in the pond and pit. On-site workers and trespassers may ingest contaminated soil and sediment. Lead exposure can cause decreased IQ scores, growth retardation, and hearing problems in children, and headache, fatigue, weakness in wrists and ankles in adults. Workers exposured over many years to benzo(a)pyrene, chrysene, and arsenic might increase the risk of getting cancer over their lifetime.
- The existing data do not adequately characterize the surface soil contamination or the contaminant migration into the groundwater.
- No data exist to assess the surface water quality and the contamination in the Cylinder Disposal Area where scrap cylinders were used as fill material. The cylinders have been buried for 20 to 30 years and may be corroding and releasing contaminants into groundwater, surface water, and air.